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					     Chair-Mounted Computer Workstation
             End-Product Design

                  Senior Design May06-09

                       Client: Lockheed Martin

                  Faculty Advisors: Arun Somani
                                    Zhao Zhang

                  Team Members: Christian Baldus
                                Isi Oamen
                                David Roberts
                                Shawn Yockey

DISCLAIMER: This document was developed as a part of the requirements of an
electrical and computer engineering course at Iowa State University, Ames, Iowa. This
document does not constitute a professional engineering design or a professional land
surveying document. Although the information is intended to be accurate, the
associated students, faculty, and Iowa State University make no claims, promises, or
guarantees about the accuracy, completeness, quality, or adequacy of the information.
The user of this document shall ensure that any such use does not violate any laws with
regard to professional licensing and certification requirements. This use includes any
work resulting from this student-prepared document that is required to be under the
responsible charge of a licensed engineer or surveyor. This document is copyrighted by
the students who produced this document and the associated faculty advisors. No part
may be reproduced without the written permission of the senior design course
coordinator.



                           December 14, 2005
Project Design – Chair-Mounted Computer Workstation


Table of Contents
1.   Introduction ............................................................................................................................. 1
  1.1. Executive Summary ........................................................................................................ 1
  1.2. Acknowledgment ............................................................................................................ 1
  1.3. Problem Statement .......................................................................................................... 1
     1.3.1.    Problem ................................................................................................................... 1
     1.3.2.    Solution ................................................................................................................... 2
  1.4. Operating Environment ................................................................................................... 4
  1.5. Intended Users and Intended Uses .................................................................................. 5
     1.5.1.    Intended User(s) ...................................................................................................... 5
     1.5.2.    Intended Use(s) ....................................................................................................... 5
  1.6. Assumptions and Limitations ......................................................................................... 5
     1.6.1.    Assumptions............................................................................................................ 5
     1.6.2.    Limitations .............................................................................................................. 6
  1.7. Expected end product and other deliverables ................................................................. 6
2. Proposed Approach and Product Design Results.................................................................... 7
  2.1. Approach Used................................................................................................................ 7
     2.1.1.    Design Objectives ................................................................................................... 7
     2.1.1.    Functional Requirements ........................................................................................ 7
     2.1.2.    Design Constraints .................................................................................................. 8
     2.1.3.    Technical Approach Considerations and Results ................................................... 9
     2.1.4.    Testing Approach Considerations ......................................................................... 10
     2.1.5.    Recommendations Regarding Project Continuation or Modification ................... 10
  2.2. Detailed Design ............................................................................................................. 10
     2.2.1.    List of Parts ........................................................................................................... 10
     2.2.2.    Base Computer Design ......................................................................................... 12
     2.2.3.    Wireless Link Design ............................................................................................ 12
3. Estimated Resources and Schedules ..................................................................................... 16
  3.1. Estimated Resource Equipment .................................................................................... 16
     3.1.1.    Personnel Effort Requirement............................................................................... 16
     3.1.2.    Other Resource Requirements .............................................................................. 17
     3.1.3.    Financial Resource Requirements......................................................................... 18
  3.2. Schedules ...................................................................................................................... 21
4. Closure Materials .................................................................................................................. 24
  4.1. Project Team Information ............................................................................................. 24
     4.1.1.    Client Information ................................................................................................. 24
     4.1.2.    Faculty Advisor Information................................................................................. 24
     4.1.3.    Student Team Information .................................................................................... 25
  4.2. Closing Summary.......................................................................................................... 25




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Project Design – Chair-Mounted Computer Workstation


List of Figures
Figure 1-1: Bluetooth Headset for Voice Activation ................................................................ 3
Figure 1-2: Head-mounted Display ........................................................................................... 3
Figure 1-3: Gaming Glove........................................................................................................... 4
Figure 2-1: Wireless Transmitter Block Diagram .................................................................. 13
Figure 2-2: Wireless Receiver Block Diagram ....................................................................... 14
Figure 2-3: Glove Functional Diagram .................................................................................... 15
Figure 3-1: Gantt chart - Fall 2005 Project Calendar ........................................................... 22
Figure 3-2: Gantt chart - Spring 2006 Project Calendar ...................................................... 23
Figure 3-3: Gantt chart - Fall 2005 Deliverables ................................................................... 23




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Project Design – Chair-Mounted Computer Workstation


List of Tables
Table 0-1: Definitions .................................................................................................................. V
Table 2-1: List of Parts .............................................................................................................. 11
Table 3-1: Original Personnel Effort Requirements .............................................................. 16
Table 3-2: Revised Personnel Effort Requirements ............................................................. 17
Table 3-3: Original Other Resource Requirements .............................................................. 17
Table 3-4: Revised Other Resource Requirements ............................................................ 18
Table 3-5: Original Financial Resource Requirements ........................................................ 18
Table 3-6: Original Financial Resource Requirements (cont.) ............................................ 19
Table 3-7: Revised Financial Resource Requirements........................................................ 20
Table 4-1: Client Information .................................................................................................... 24
Table 4-2: Faculty Advisor Information ................................................................................... 24
Table 4-3: Team Member Information .................................................................................... 25




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Project Design – Chair-Mounted Computer Workstation




Table 0-1: Definitions

Term                     Description
Artifact                 Any object made, modified or used by a project team.
                         A device that stores energy and makes it available in an
Battery
                         electrical form.
                         A device whose internal make-up, design, or operation is
Black box                discrete. Its function is known, but usually not its internal
                         components.
                         A radio technology built around a new chip that makes it
Bluetooth                possible to transmit signals over short distances between
                         computers and hand-held devices without the use of wires.
                         A small, pen-like device that can be used to control Bluetooth
Bluewand
                         enabled devices by hand-movements.
                         Compact Disc Read-Only Memory. An optical disc holding
CD-ROM
                         computer data.
Chair                    A seat typically having four legs and a back for one person.
                         A programmable electronic device that can store, retrieve, and
Computer
                         process data.
                         A software program that allows the user to type at 160 words
Dragon Naturally
                         per minute by speaking to the computer in perfectly natural
Speaking
                         continuous speech.
                         Stores and retrieves information on floppy disks. The floppy disk
                         consists of a plastic casing enclosed in a thin piece of plastic.
Floppy drive
                         The plastic has a coding of magnetic particles on it, onto which
                         the information is written in magnetic code.
                         An optical instrument consisting of a pair of lenses and often
Glasses
                         worn on the face.
                         A covering for the hand having separate sections for each of the
Glove
                         fingers and the thumb and often extending part way up the arm.
                         Hard disk drive. It is generally used as a storage device in a
HDD
                         personal computer.
                         A device which allows for hands-free operation via an ear and
Headset
                         mouthpiece.
                         The means by which two systems or devices are connected and
Interface
                         interact with each other.
                         An assemblage of systematically arranged keys by which a
Keyboard
                         machine or device is operated.
                         A monitor that utilizes a liquid crystal display instead of cathode
LCD Screen
                         ray tubes.
Memory stick             A type of transportable data storage device.




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Project Design – Chair-Mounted Computer Workstation


                    A fully integrated, dual-axis miniature gyroscope that is fully
MicroGyro           self-contained for easy integration into human input devices
                    such as computer mice, remote controls and game controllers.
Term                Description
                    A device for converting acoustic sound waves into an electrical
Microphone
                    representation of the sound wave.
                    Structural elements that are interchangeable. Maximum
Modular
                    flexibility in arrangement and size.
                    A cathode-ray tube used for display (as of television pictures or
Monitor
                    computer information).
                    The principal circuit board of the computer that contains the
Motherboard
                    processor.
Pentium             A high-speed microprocessor chip made by Intel.
Pointer device      A device for moving the cursor, e.g. a mouse.
                    The original form which serves as a model on which successors
Prototype
                    are based.
                    Fastened in such a manner as to ensure nothing will shake
Secured for Sea
                    loose in a turbulent environment.
                    An input device commonly used in laptop computers. It is used
Touch pad           to move the cursor, using motions of the user's finger. It is a
                    substitute for a computer mouse.
                    A ball that is mounted usually in a computer console so as to be
Trackball           only partially exposed and is rotated to control the movement of
                    a cursor on a display.
                    An operating system that supports multitasking and is ideally
UNIX
                    suited to multi-user applications (such as networks).
                    Universal Serial Bus. A protocol for transferring data to and
USB
                    from digital devices.
                    Voltage Alternating Current. The voltage measurement in an AC
VAC
                    system.
                    Voltage Direct Current. The voltage measurement in a DC
VDC
                    system.
                    An electronic software/hardware system that can be trained to
Voice recognition   recognize an individual’s voice patterns to allow for an
                    alternative means of computer input replacing the keyboard.
                    A real time camera whose images can be accessed using the
Web cam             World Wide Web, instant messaging, or a personal computer
                    video calling application.
                    A powerful computer often used for scientific applications. Also
Workstation
                    a desk, chair and other equipment at which someone works.




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Project Design – Chair-Mounted Computer Workstation



1. Introduction
Introductory topics develop an overview of the end product and specify design issues as
given by the user. The introductory section covers seven main areas: abstract,
acknowledgement, problem statement, operating environment, intended users and
intended use, assumptions and limitations, and finally the expected end product and
other deliverables.


1.1. Executive Summary
Current computer console paradigms involve the use of significant computer hardware
within an enclosure presented in front of the operator, which must be environmentally
protected and maintained. Specifically in a military application a less cumbersome
method of interface is needed to allow soldiers to accomplish their typical work tasks.
The solution to this problem is the development of a versatile and modular workstation
mounted to a chair allowing greater freedom of movement while maintaining
functionality and durability. The result of this project will be an operational prototype that
may be modeled for future development. This prototype will demonstrate a feasible and
reliable solution to the current problem, allowing the operator mobility without sacrificing
functionality.


1.2. Acknowledgment
Dr. Arun Somani and Dr. Zhao Zhang of Iowa State University will provide technical and
practical advice throughout the creation process. Further, R. J. Monson of Lockheed
Martin will provide design specifications and requirements as appropriate.


1.3. Problem Statement
The problem statement consists of two areas: the problem and the solution. These
statements shall provide the reader with a general overview of the problem and the
approach that will be used to solve the problem. This is included so that the reader will
have the correct conception of the problem and the solution approach upfront.


1.3.1. Problem
The intended placement of the design, as specified by the project client, is in a tactical
military environment aboard either a watercraft or aircraft. The intended operator for the
design is specified as a sailor or airman in the United States military, but the design may
be extended to any similar military or civilian environment. As such, the design assumes
full use of all limbs and fingers and the ability to understand words and symbols
common to the English language. Further, as a high school education or equivalent is
required for participation in the United States military, such a level of education is also
assumed.



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Project Design – Chair-Mounted Computer Workstation


The user interface must allow similar functionality to that of a standard personal
computer system, while simultaneously allowing the greatest freedom of movement
possible. Further, a display must allow the operator unobstructed view of the output
while also allowing a view of his/her peripheral environment. Suitable replacement for
standard input/output devices will be incorporated in a novel configuration to allow the
user full functionality while simultaneously protecting the hardware and software devices
from environmental factors such as impact or excessive movement. Such alternative
devices may include a voice activated system and a function specific programmable
keyboard. The intended power supply for the main unit is 120 volts, alternating current,
to allow for a more universal power adaptation. Further power considerations will
include the use of a rechargeable battery system for the satellite display, voice
activation system, and pointer system. The specific power supplies will be altered as
needed.

To ensure the proper functionality of the workstation, the core system components must
be secured to the chair while the audio, video, and pointer components must be
attached to the body of the operator. To allow non-intrusive communication between the
main unit and the wearable devices, a wireless link must be implemented. In addition to
environmental factors such as heat, cold, dirt, and dust, the design must compensate
for possible environmental instability such as rocking, swaying, tilting and shock.

1.3.2. Solution

In general, research into commercial applications and implementations of similar
products will determine what solutions have and have not worked in the past. A review
of current voice activation technologies will provide information on the durability,
functionality and availability of numerous configurations. Further, speech-oriented input
configurations will be reviewed for applicability within a moderate to high ambient noise
environment. In addition, the microphone needs to be wireless to prevent the user from
being entangled with excessive cords. A Bluetooth microphone very similar to the one
shown below shall be employed. This will allow for discrete, accurate communication
within a low to moderate ambient noise atmosphere. Power for the microphone will be
supplied by a rechargeable internal battery.




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Project Design – Chair-Mounted Computer Workstation




                     Figure 1-1: Bluetooth Headset for Voice Activation


Display implementation will include a wearable display mounted inside a pair of glasses.
The voice activation and display will all be implemented so that the user does not have
constrained mobility. Streaming wireless and battery-operated technologies will be
incorporated to transmit signals from these devices to the main processing unit. The
display unit will be very similar to the monocular head-mounted display shown below.
The battery supply and wireless transmission hardware will be connected via wire to a
small module connected to the user's belt.




                             Figure 1-2: Head-mounted Display


The user will employ a glove to act as a pointer similar to a mouse or trackball. The
hardware for the glove shall be placed on the back of the hand similar to the gaming
glove pictured below. The glove subsystem shall employ Bluetooth technology to
prevent the user from becoming entangled in excessive cables. The power for the
glove shall be worn on the user’s belt with cables routed through a vest to the belt.


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Project Design – Chair-Mounted Computer Workstation


When the user moves their hand up and down or left to right, the pointer shall move
accordingly. The reason for this is a MicroGyro embedded in the glove to monitor
movement. The clicking shall be accomplished with spines similar to the gaming glove.
When the finger moves 90 degrees towards the palm, it is interpreted by the glove to be
a mouse-click. The design of the glove shall enable a member of the military to be able
to perform their duties and operate a computer at the same time.




                                Figure 1-3: Gaming Glove


The main computer will be a laptop that is secured in a docking station under the chair.
This shall expedite maintenance and allow for use of the laptop’s disk drives if need be.
In addition, this shall make the process of securing the computer simpler when not in
use. If the laptop contains classified data it can be placed into the drawer of a safe
when not in use. The laptop will be Bluetooth-enabled to allow it to communicate with
all of the Bluetooth components of the system.


1.4. Operating Environment
The Chair-Mounted Computer Workstation is intended to be a self-contained, modular
system requiring an external 120 volt alternating current and a rechargeable battery
system to operate. The specific values of the power supply will be altered as needed
during product implementation. All hardware will be secured to the chair or operator
and the entire system will be mobile. Potential environmental hazards include
excessive heat, cold, condensation, dust, dirt and environmental movement such as
rocking or tilting. Additionally, operation in a small physical space and the movement of
personnel around the workstation must be considered.




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Project Design – Chair-Mounted Computer Workstation




1.5. Intended Users and Intended Uses
This subsection shall include two separately identified components: the intended user
and the intended use. To properly design an end product that will provide the maximum
satisfaction and perform in the most efficient manner, it is essential to understand the
end user and the associated end uses.


1.5.1. Intended User(s)
The intended operator for the design is a member of the United States Military.
However, the design may be utilized by other individuals as well. Thus, the intended
user group is a constraint of the client specifications, rather than inherent in the design
itself. The design assumes full use of all limbs and fingers and the ability to understand
words and symbols common to the English language and utilized on standard American
computer keyboards. Education level is assumed to be of a high school equivalent or
higher with adequate training on system use prior to operation. The design is intended
for use by both males and females and is not age specific. The workstation shall be
implemented so that any operator may use it regardless of height.

1.5.2. Intended Use(s)
The workstation is intended to be installed on a watercraft or aircraft for military
purposes. As such, the design will facilitate use and proper operation within limited
physical space. The projected prototype shall not be platform specific or require any
special software beyond the standard hardware device drivers. The design will allow
proper operation of any application requiring standard personal computer capabilities.
Input/Output capacities allow further hardware or software expansion as needed.


1.6. Assumptions and Limitations
This subsection describes design assumptions and limitations taken prior to
development. Although these are flexible and may change, the majority shall remain
integral components to the design process. The assumptions are made in regard to
specific uses and functionality, while the limitations are taken in regard to operating
environment and power availability.

1.6.1. Assumptions

1. The initial number of users shall be one, but the system shall be network capable to
   enable communication between systems.
2. The system will be used in a tactical military environment and thus subject to
   tolerable environmental factors such as dust, dirt, temperature variations, gravitation,
   and vibrations.
3. The system will be installed in a secure area; therefore hardware personnel
   identification devices (i.e. identification readers) are not necessary.



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Project Design – Chair-Mounted Computer Workstation


4. Physical area unit utilizes will be limited to smallest design possible while
   maintaining functionality.
5. The workstation shall be sheltered such that direct sunlight, rain, snow, etc. are not
   factors.
6. Only reading capabilities are needed; therefore a standard CD-ROM drive is
   sufficient.
7. Networking implementation will be wireless.
8. The prototype will utilize the Microsoft Windows XP operating system. This allows
   for ease of use and budget considerations and is in no way a limitation of the design
   itself.

1.6.2. Limitations

1. The system will run from both a 120 VAC source and a rechargeable battery system.
2. The system should occupy the smallest amount of space possible.
3. The placement of components cannot interfere with the mobility of the operator.
4. All hardware must be securable to either the chair or the operator.
5. The functionality must match or exceed that of a common personal computer.
6. All components must be modular, allowing for easy replacement and adjustment in a
   tactical environment.
7. All components must be robust and able to endure greater than normal physical
   wear.
8. Although military specifications upon components is desired, budgetary constraints
   impose a limitation to standard components. This is a budgetary imposition and in
   no way reflects a limit of the design itself.

1.7. Expected end product and other deliverables
A standalone, completely operational prototype for the Chair-Mounted Computer
Workstation will be delivered to Lockheed-Martin. The Workstation will provide or
exceed the same functionality as a personal computer, but in a modular and compact
design. Complete functionality will be provided through voice-activated functions in a
novel setup, head-mounted display, and standard input. Communication between the
display module to the main processor shall be wireless. The system shall demonstrate
non-conventional methods of data entry into a computer, allowing for less space to be
used by the traditional computer input devices.

Additional deliverables include:
   Weekly progress report to client
   Oral presentation of design results to client
   Peer review panel on December 6, 2005
   Bound revised design/progress reports by December 14, 2005




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Project Design – Chair-Mounted Computer Workstation



2. Proposed Approach and Product Design Results
This section will address the components of the project that must be met in order to
maintain a high probability of success. Also included in this section will be a listing of
what the end product is expected to do and not to do.

2.1. Approach Used
The following components are essential to the success of the project. In order to
maintain the highest probability of success, each component will be analyzed
thoroughly.


2.1.1. Design Objectives
The following items will be implemented based on the problem statement in the project
plan document.

      Develop a wireless system to transmit video signals to a receiver located on a
       utility belt, which will be displayed on the headset.

      Develop a subsystem that will execute applications and display information
       based on user command. The means by which the execution will take place is
       primarily voice recognition. However, pointing devices and a keyboard will be
       provided as a redundancy to perform the same functions.

      Develop a glove to be used as the pointer for input. The glove will act as a
       mouse while to the user is out of range of the console. The movement of the
       users hand and fingers will be interpreted into mouse clicks and movement.

      Develop a power system to provide mobility to the user and to enable extended
       periods of use.


2.1.1. Functional Requirements
The following functional requirements address what the final product will and will not do.

    Provide wireless graphical feedback to the user
   There will be a wireless transfer of video signals to the headset within a range of five
   meters.

    Data input
   The user will have the capability to enter and manipulate data into the system using
   voice recognition, glove and keyboard.




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Project Design – Chair-Mounted Computer Workstation


    Quick function options
   A series of actions will be available on the keyboard, voice recognition and glove
   that will execute a command or application. This will provide the user with a quick
   way to execute an operation without having to perform a sequence of steps.

    System navigation
   The user will have the capability to navigate through the system using conventional
   devices such as a trackball and keyboard; however there will be an emphasis on the
   unconventional use of data entry.

    Power
   The system will implement both wired and wireless power supplies. The power
   supplied to the chair will be 120 volts, alternating current, while the battery supplying
   power to the microphone and headset will be rechargeable. The specific voltages
   are subject to change based on the needs of the project.

2.1.2. Design Constraints
In the development of the project there are several constraints that need to be
considered. Each constraint causes a limitation on the design and functionality of the
project.

    Size
   The size of the components must fit into the smallest possible area. For this project,
   all non-mobile components shall fit into a cart that is located next to the computer.
   The components shall occupy a space of no more that two cubic feet.

    Mobility
   The user must have the opportunity to be mobile while maintaining the same
   functionality as current computer systems.

    Wireless Reception Range
   The range of the wireless transmission of the wireless components will be five
   meters.

    Power
   The power subsystem must be able to support mobile user operations for two hours.
   While the user is in the chair, the mobile system should be able to be recharged with
   a minimum of hassle for the operator.

    Weight
   The mobile subsystem must be light enough to wear for extended periods of time.
   Therefore, the total weight will be a consideration in all components designed and
   used by the project team. The maximum weight should not exceed four pounds total
   or one-half pound on extremities.



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Project Design – Chair-Mounted Computer Workstation


2.1.3. Technical Approach Considerations and Results
There are several aspects to the system that required further research. All components
of the system will optimize cost, mobility and performance. Some considerations are
the following:

    Display
   The means of technology used in displaying the information can be done with a
   standard LCD screen attached to the armrest, or via a projected screen onto a
   headset worn by the user. The use of a headset display device maximizes mobility.
   Since the LCD screen is attached to the chair, the headset worn by the user was
   selected. It will operate under various lighting conditions in a satisfactory manner.

    Audio input
   All audio input will use a microphone technology. A Bluetooth headset was selected
   because of its transmission range and compatibility with any computer that has a
   USB port and utilizes Windows XP as its operating system.

    Data input
   The methods used for inputting data include a touch sensitive keyboard, glove and
   voice recognition. If one input device should fail, an effort will be made to make an
   alternative device available. Since the voice activation provides the user the most
   freedom and convenience, it was chosen as the primary source. The vast majority
   of computer applications today require a mouse to function properly. The secondary
   input will be the glove subsystem, which will allow the user the ability to compute
   while away from the chair but still within the range of the wireless devices. A
   keyboard and trackball will be implemented as tertiary input methods for
   redundancy.

    System navigation
   The options for system navigation are the traditional trackball and keyboard or voice
   recognition and glove. Both methods will provide the user with special commands to
   execute certain applications. However, since voice recognition and the glove system
   provide the user the best mobility, it will be implemented as the primary option.

    Wireless Link
   The visual display system will use radio frequency (RF) transmission technology at
   1.9 GHz to transfer signals from the main system to the wireless components. The
   RF technology was chosen due to the strength of its signals and it low interference
   to external sources. Bluetooth was not used for the video link as it does not support
   the bandwidth required for the video system. For the glove and voice input
   subsystems Bluetooth shall be utilized. Bluetooth was chosen for its proven
   reliability and for its multi-platform compatibility.




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Project Design – Chair-Mounted Computer Workstation


2.1.4. Testing Approach Considerations
In order to successfully complete this project, there will have to be a focus on each
subsystem and component individually. In order to track the progress of regression
testing, every test will be documented with the person who conducted the test, the date
and the results from the test. All testing will take place in the labs found in Coover Hall
and Town Engineering on the Iowa State University campus. When the main
components to the system are put together, the system will be tested to ensure that it is
capable of standard operation. Next, voice recognition will be tested. Each of the team
members will program the system to perform tasks on command. This will allow
thorough testing of the voice recognition component individually. Lastly, the wireless
transfer of audio, video and glove inputs will be calibrated in order to provide the
maximum range and quality of the signal.


2.1.5. Recommendations Regarding Project Continuation or Modification
At this point in the project there are two alternatives to continuing the project as
envisioned: altering the project prior to continuation and abandoning the project. Based
on the progress of the project thus far, it is believed that the best choice is to alter the
project into a proof of concept demonstration. The reason for this change is due to a
change in the project's budget that will not enable the project team to produce the
prototype envisioned in the beginning of the project. The intentions were to develop a
system with the power of a laptop or desktop computer, but to allow the user greater
freedom and mobility. The proposed design accomplishes both of these intentions. Not
only does the project meet the needs of the user, but it also requires a great deal of
development work. This work involves the implementation of the wireless transmission
of the audio and video signals, glove input and voice recognition.


2.2. Detailed Design
This section provides a detailed description of the chair mounted workstation and its
parts. The following text is broken into groups: list of parts, base computer design, and
wireless link design.


2.2.1. List of Parts
In Table 2-1 below, a detailed list of parts is shown. Headings for this table include
“Part Type”, “Part Source”, "Quantity" and “Cost”. (Note: “Cost” is an estimated value
based on current price quotes.)




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Project Design – Chair-Mounted Computer Workstation




                                 Table 2-1: List of Parts
Part type                           Part Source             Quantity   Cost
Bluetooth Glove:
MicroGyro Developer Kit             www.gyration.com           1       $150.00
                                                                       $0.00
FPGA                                www.altera.com             1
                                                                       (loaned)
Custom Designed Glove                                          1       $25.00
Bluetooth Transceiver                                          1       $50.00

Misc. parts to complete design                                 X       $45.00


Wireless Voice:
                                                                       $0.00
Bluemate Microphone                 www.tigerdirect.com        1
                                                                       (loaned)
                                                                       $0.00
Dragon Naturally Speaking                                      1
                                                                       (loaned)
                                                                       $0.00
Bluetooth USB Reciever                                         1
                                                                       (loaned)

Wireless Video:
                                                                       $0.00
Wireless Video Sender               www.buy.com                1
                                                                       (loaned)
                                                                       $0.00
Head Set Display                                               1
                                                                       Artifact

Mounting:
Chair/Cart                                                     1       $45.00
Mounting Brackets                   Lowe’s                     2       $10.00
Mounting Hardware                   Lowe’s                     X       $5.00

Aux. Input:
                                                                       $0.00
Wireless Keyboard                                              1
                                                                       (loaned)
                                                                       $0.00
Wireless Mouse                                                 1
                                                                       (loaned)

Misc:
Battery Pack                                                   1       $10.00
Utility Belt                                                   1       $10.00
Cables                                                         X       $30.00

                                                             Total:    $380.00



Senior Design May06-09                                                            11
Project Design – Chair-Mounted Computer Workstation


2.2.2. Base Computer Design
This section contains information relating to the processing unit, display unit and
case/mounting apparatus of the computer mounted workstation.

2.2.2.1   Processing Unit
The core processor for the chair system will be a team member’s laptop. Utilizing the
laptop will allow the project team to spend financial resources on subsystems such as
the Glove and the Wireless Video links. In addition, the goal is to produce a technology
that is compatible with a wide range of laptops similar to those found in the United
States military.

2.2.2.2   Display Unit
The display is a monocular device that is small enough for the user to comfortably wear
in a stressful environment. One large advantage to the monocular device is that it
allows the other eye to keep track of things going on in the physical world. Making this
device wireless will increase the freedom for the user by allowing them to move away
from the computer without being disconnected from the system. However, the greatest
usability of the computer system will be when the user is seated. This way the user can
utilize both the keyboard and voice activation to access the system.

2.2.2.3   Case/Mounting Apparatus
The housing for the base unit will be stored in a cart next to the chair. This will allow the
project team to show the concept of the chair and still remain within budget. The
purpose of this project is to deliver new combinations of technologies instead of
demonstrating new ways of mounting computer hardware.

2.2.3. Wireless Link Design
The intent of this project is to develop a bi-directional wireless communications device
to transmit audio and video from the base unit to the wearable components and voice
and pointer inputs to the computer. However, due to limited budget, limited time and
lack of experience with wireless components, this design team will be undertaking a
single transmission of video from the base station to the wearable components. The
design of the glove subsystem has not been completed yet as it will require the
incorporation of two very complex subsystems: a Bluetooth transmitter and a
MicroGyro. In the glove section, the complete list of functional requirements will be
specified.

The first two sections provide an in-depth description of a wireless video
communications device. The device is broken into two physically separate components:
the transmitter and receiver.

2.2.3.1   Video Transmitter
The transmitter is, as shown in Figure 2-1 below, is a combination of a transceiver chip
set to transmit, a high speed analog-to-digital converter, various frequency filters, and
an antenna. The components used for transmitting are highlighted in red.


Senior Design May06-09                                                                    12
Project Design – Chair-Mounted Computer Workstation




                       Figure 2-1: Wireless Transmitter Block Diagram


The transceiver, MAX2410, has the capability of transmitting up to 11Mbps with an
operating range of 800 MHz to 2400 MHz. This chip was chosen to give the project
team the speed needed to keep up with the video transmission. 1.9 GHz transmission
rate was chosen to keep the signal strong and reduce interference from external
sources. This chip also offers built-in LNA (Low Noise Amplifier) for receiving weak
signals and a PA (Power Amplifier) Driver to generate a stronger signal.

The analog-to-digital converter is also a high speed product. With a 60 mega samples
per second sample rate and 14-bit resolution, this product will offer fast and accurate
data representation. Transmitting digitally will provide less noise and inaccurate data
from passing through the transmitter.


2.2.3.2   Video Receiver

The receiver is, as shown in Figure 2-2 below, is a combination of a transceiver chip set
to receive, a high speed digital-to-analog converter, various frequency filters, and an
antenna. The components used for receiving are highlighted in blue.




Senior Design May06-09                                                                13
Project Design – Chair-Mounted Computer Workstation




                        Figure 2-2: Wireless Receiver Block Diagram


The transceiver, MAX2410, has the capability of receiving a weak signal and boosting it
to appropriate levels with the LNA (low noise amplifier).The receiver will be set to
receive a 1.9 GHz digital signal.

The digital-to-analog converter is also a high speed product. With 200 mega samples
per second sample rate and 14-bit resolution, this product will offer fast and accurate
data generation.

2.2.3.3   Bluetooth Glove/Pointer
Below is a functional diagram of the Bluetooth glove, Figure 2-3. The basis for the
Bluetooth transmitter portion of the glove shall be based upon open source Bluetooth
projects such as the Bluewand. The Bluewand is a Bluetooth remote control for
Bluetooth devices. From this design the project team will be able to transmit information
to the base station.




Senior Design May06-09                                                                14
Project Design – Chair-Mounted Computer Workstation




                           Figure 2-3: Glove Functional Diagram
The buttons shall be handled using a spring-loaded potentiometer for the index and
middle fingers. Attached to the potentiometer shall be a spine which is in turn attached
to a ring on the finger. When the ring is at 90 degrees to the palm, this shall be counted
as a mouse click. The last major subsystem of the glove is the MicroGyro. The
MicroGyro will provide feedback based on hand movement to the base station. The 8-
bit signal utilized to monitor the MicroGyro will be transmitted via the Bluetooth
transmitter based on the Bluewand.

2.2.3.4   Voice Input
Voice input is handled via a Bluemate headset, which is a Bluetooth powered
microphone that is worn over one of the user’s ears. Coupled with Dragon Naturally
Speaking, the voice subsystem has a functional range of approximately ten meters.
There are currently a few issues with sound quality with the Bluemate, so it will probably
be replaced with another similar microphone. If due to budget restraints the project
team cannot replace it, the Bluemate headset will still work as a valid proof of concept
for the overall design goals.




Senior Design May06-09                                                                 15
Project Design – Chair-Mounted Computer Workstation



3. Estimated Resources and Schedules
Knowledge of estimated resource requirements and the project schedule are essential
to the proper evaluation of a design plan. This section will discuss both topics in detail.

3.1. Estimated Resource Equipment
Three separate resources make up the estimated resource requirements: personal
effort requirements, other resource requirements, and financial requirements. These
three topics will be discussed and evaluated in this sub-section.

3.1.1. Personnel Effort Requirement
The table below, Table 3-1, displays an in-depth estimate of the personal effort of each
team member in this project. Table 3-2 displays a revised estimate of the original table.
These tables display the personal effort on an individual basis as well as a total of all
effort required per task item. An estimate of one hour per meeting with the adviser and
the special group meetings over the length of the course are the factors included in the
meetings column. The project reports column will include each project report with which
the group has to collaborate and write, as well as the weekly progress reports. Other
project documentation that may be involved is also included. The project construction
column is for the actual project work which includes parts ordering, poster construction,
testing, and assembly. The estimates are also based on the projected effort required to
perform the task correctly.

Table 3-1: Original Personnel Effort Requirements

                                    Project          Project       Project
  Member Name         Meetings                                                     Totals
                                    Reports         Research     Construction


Christian Baldus         60            40             45             65            210


   Isi Oamen             45            35             40             90            210


 David Roberts           60            80             55             30            225


 Shawn Yockey            45            30             65             75            215

      Totals            210           185             205            260           860




Senior Design May06-09                                                                   16
Project Design – Chair-Mounted Computer Workstation

Table 3-2: Revised Personnel Effort Requirements

                                        Project          Project     Project
  Member Name            Meetings                                                 Totals
                                        Reports         Research   Construction


Christian Baldus           65             40               55           65        225


    Isi Oamen              50             35               50          110        245


 David Roberts             65             80               55           30        230


 Shawn Yockey              50             30               70           75        225

      Totals               230           185              230          280        925

The changes between the two tables have occurred because of various reasons. First,
the hours for the meetings have increased because there were more unscheduled
meetings than expected to make sure certain deadlines were met and all members
agreed on critical issues. Also, with the design of new technologies for the system,
project research and construction are now expected to require more hours for most of
the team members.

3.1.2. Other Resource Requirements
When the project team wrote the project plan, they did not have a firm grasp on what
would be required and what would be provided during the senior design process. The
project team was promised $1000 in addition to the $150 allotted senior design budget
to work with on the project, but this is unlikely to occur. Due to the new budget
constraint, the project team has endeavored to bring down the costs of the project
wherever possible.

Table 3-3: Original Other Resource Requirements
Item                       Team Hours             Other Hours      Cost
Project Poster             10                     0                $65.00
Miscellaneous Printing     20                     0                $100.00
Mounting Equipment         3                      0                $45.00
Chair                      0                      0                $20.00
Totals                     33                     0                $230.00

Table 3-4, below, displays the revised other resources budget for the project. The
project team does not have the resources that it was promised; therefore the plan to
build the full prototype of the chair has been replaced with the plan to demonstrate proof
of concept of technologies designed for use with a future chair system.




Senior Design May06-09                                                                  17
Project Design – Chair-Mounted Computer Workstation



Table 3-4: Revised Other Resource Requirements
Item                        Team Hours      Other Hours               Cost
Project Poster              10              0                         $0.00 (Donated)
Miscellaneous Printing      20              0                         $50.00
Cart                        3               0                         $45.00
Totals                      33              0                         $95.00

3.1.3. Financial Resource Requirements
The original plan called for the creation of the entire chair system. The project team
designed the full system but is unable to implement it due to financial constraints. Table
3-5, below, is the part-by-part listing of the project when the project team had a
guaranteed budget of $1000 from the client in addition to the $150 from the senior
design budget. The changes to the entire budget will be covered in detail below.


Table 3-5: Original Financial Resource Requirements
Item                                         Price
Hardware:
LCD Screen                                   $200.00
Head Set Display                             $600.00 (Artifact from last project team)
Keyboard                                     $10.00
Keypad                                       $20.00
Processor                                    $150.00
Motherboard                                  $120.00
Memory                                       $50.00
Mini HDD                                     $175.00
Memory Stick Reader                          $40.00
Trackball                                    $25.00
Webcam                                       $20.00 (Donated from group member)
Laptop Docking Bay                           $40.00
MicroGyro Developing Kit                     $150.00
Bluetooth Headset                            $40.00
Bluetooth USB Transmitter                    $30.00
Utility Belt                                 $10.00
Battery Pack                                 $10.00
Fingerless Gloves                            $25.00
Miscellaneous Cables                         $80.00
Subtotal                                     $1795.00




Senior Design May06-09                                                                   18
Project Design – Chair-Mounted Computer Workstation



Table 3-6: Original Financial Resource Requirements (cont.)
Item                                          Price
Software:
Operating system(Windows XP Pro)              $75.00 (Donated from department)
Dragon Virtually Speaking                     $125.00 (Donated from group member)
Subtotal                                      $200.00

Miscellaneous:
Printing                                      $210.00
Chair                                         $65.00
Fabrication Materials                         $85.00
Subtotal                                      $315.00

Parts, Software, Printing Total
Total Project Cost without Labor              $2310
Donated Total                                 -$820.00
Printing Expenses Paid out of Pocket          -$165
Net Cost:                                     $1280

Labor:
840hours @ $11.00/hr                          $9240
Subtotal                                      $9240

Total with Labor                              $11550
Total with Labor and Donations                $10730




Senior Design May06-09                                                              19
Project Design – Chair-Mounted Computer Workstation



Table 3-7, below, is the revised item-by-item cost estimate in addition to the overall
project cost estimate. The table includes all items needed to complete the project
correctly; hardware, software, and miscellaneous. The project team cannot complete
the full objective, even with an increased budget of $250. With the permission of the
project team’s faculty advisors, the project shall focus on new technologies in keeping
with the spirit of the project. The three subsystems that will be developed and refined
are: display, voice and pointer. With these three subsystems the project team will
demonstrate its ideas for non-traditional computing input. If the project team happens to
be able to obtain donations, the construction of the chair may be placed back upon the
table.

Table 3-7: Revised Financial Resource Requirements
Item                                        Price
Hardware:
Head Set Display                            $0.00 (Artifact from last project team)
MicroGyro Developing Kit                    $150.00
Bluetooth Headset                           $0.00 (Lent from group member)
Bluetooth Reciever                          $0.00 (Lent from group member)
Bluetooth Transceiver                       $50.00
Utility Belt                                $10.00
Battery Pack                                $10.00
Fingerless Gloves                           $25.00
Miscellaneous Cables                        $30.00
Miscellaneous Parts                         $45.00
Hardware Subtotal                           $320.00

Software:
Operating system(Windows XP Pro)            $0.00 (Donated from department)
Dragon Virtually Speaking                   $0.00 (Donated from group member)
Software Subtotal                           $0.00

Miscellaneous:
Project Poster                              $0.00 (Donated from department)
Miscellaneous Printing                      $50.00
Cart                                        $45.00
Mounting Supplies                           $15.00
Misc. Subtotal                              $110.00

Labor:
900hours @ $11.00/hr                        $10021.00
Labor Subtotal                              $10021.00

Total with out Labor                        $430.00
Total                                       $10451.00




Senior Design May06-09                                                                20
Project Design – Chair-Mounted Computer Workstation




3.2. Schedules
A realistic, well-planned schedule is an essential component of every well-planned
project. Most scheduling errors will occur as a result of either not properly identifying all
of the necessary activities or not properly estimating the amount of effort required to
correctly complete the activity. Two types of schedules are shown in this section. The
first two schedules, Figures 3-1 and Figures 3-2, are Gantt charts showing tasks versus
the proposed project calendar. The second type of schedule, Figure 3-3, is a Gantt
chart that indicates when each project deliverable will be delivered. The first two Gantt
charts will cover the entire project from beginning to end. The third Gantt chart will only
cover the project during the Fall 2005 semester because no schedule of deliverables for
Spring 2006 has been provided to the project team.

For Figures 3-1 and 3-2, all projected tasks have been met on time and the team is
continuing on schedule. The May06-09 project team has a huge advantage over the
May04-15 team because the new team had access to the lessons learned by the old
team.     Therefore, blind alleyways that the May04-15 team encountered in
implementation can be avoided. The project team's internal deadlines have not been
moved forward to allow for extra design work on the glove. It is the project team’s firm
intention of staying ahead of schedule to minimize possible risks involving developing
new technologies.

For Figure 3-3, all deliverables up to this date have followed the original schedule and
there are no foreseeable reasons to change the Gantt chart of deliverables for Fall
2005. When the schedule becomes available for deadlines in Spring 2006, the project
team shall produce a Gantt chart of deliverables for that term. Even without a Gantt
chart, work has already begun on second semester project deliverables such as the
poster; however, the team will follow the timetable when it is provided.




Senior Design May06-09                                                                    21
Project Design – Chair-Mounted Computer Workstation




Figure 3-1: Gantt chart - Fall 2005 Project Calendar




Senior Design May06-09                                 22
Project Design – Chair-Mounted Computer Workstation




Figure 3-2: Gantt chart - Spring 2006 Project Calendar




Figure 3-3: Gantt chart - Fall 2005 Deliverables




Senior Design May06-09                                   23
Project Design – Chair-Mounted Computer Workstation




4. Closure Materials
The following section contains information for closure on the design plan including
client, faculty advisor and student team information. It also contains a closing summary
of the design plan.

4.1. Project Team Information
Project team member information is outlined below in tables. The information within
these tables includes addresses and numbers of people involved with the project.

4.1.1. Client Information
Table 4-1 provides information pertaining to contacts provided by our client.

Table 4-1: Client Information
Client Name        Contact Name          Office/Mailing Office               E-Mail Address
                                         Address        Number
Lockheed Martin    R.J. Monson           Eagan, MN         (651)456-2673     robert.j.monson@lmco.com


4.1.2. Faculty Advisor Information
Table 4-2 lists information pertaining to faculty members of Iowa State University that
will be assisting us in our design.

Table 4-2: Faculty Advisor Information

                    Office/Mailing
Advisor Name                             Office Number      Fax Number            E-Mail Address
                       Address
                      2211 Coover                            (515)294-3637
 Dr. Arun Somani                           (515)294-0442                           arun@iastate.edu
                     Ames, IA 50011

                      368 Durham
  Dr. Zhao Zhang                           (515)294-7940     (515)294-3632        zzhang@iastate.edu
                     Ames, IA 50011




Senior Design May06-09                                                                                24
 Project Design – Chair-Mounted Computer Workstation




 4.1.3. Student Team Information

 Table 4-3: Team Member Information

  Member                                                  Phone
                   Major(s)       Mailing Address                         E-Mail Address
   Name                                                   Number
                                            th
                    Computer     211 South 5 Street #2   (515)290-4707   cmbaldus@iastate.edu
Christian Baldus
                   Engineering      Ames, IA 50010

                    Electrical   4335 Maricopa Dr #3
   Isi Oamen                                             (712)540-4652      isi@iastate.edu
                   Engineering     Ames, IA 50014

                    Computer       214 S. Hyland #3      (515)991-4150
 David Roberts                                                           robertdl@iastate.edu
                   Engineering     Ames, IA 50014

                    Computer     110 McDonald Dr #13a    (712)574-0682
Shawn Yockey                                                             syockey@iastate.edu
                   Engineering      Ames, IA 50014




 4.2. Closing Summary
 Current computer workstations involve significant computer hardware in an enclosure
 usually placed in front of the operator, with environmental protection and maintenance
 being required. A less intrusive and smaller workstation than this standard would
 enhance the ability of military personnel to complete required tasks. By providing a
 chair-mounted computer workstation, the size and mobility will become assets rather
 than hindrances. The system will be designed specifically for tasks associated with
 military personnel while maintaining functionality and durability the operator currently
 uses. This project will maintain the efficiency and functionality of current workstations
 while making significant advancements in reducing size and allowing the operator more
 flexibility.




 Senior Design May06-09                                                                         25

				
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