Vigilant Sensing Technology by gnAMGr1


									Vigilant Sensing Technology

 VST1000 Remote Sensing System
   Preliminary Design Review

    Development Team: Patrick Hauser
                      Joel Keesecker
                      Mark Kien
             Review Outline
•   Project Objectives
•   Motivation
•   System & Module Descriptions
•   Division of Labor
•   Condensed Schedule
•   Risks & Mitigation
•   Questions
      Project/System Objectives
•   Seamless turnkey operation
•   Broadband pipeline for expandability
•   Selection of narrowband sensors
•   Clandestine packaging of remote units
• Provide generic, economical remote sensing
  ability for use in public safety and medical
• Use non-dedicated lines to communicate
  with the sensors in the field.
System Level Diagram
            System Modules
•   Master Control Unit
•   RF Remote Sensing Unit
•   Power Line Remote Sensing Unit
•   PC Interface
                    System Interfaces

                                                      POWER LINE
                                                    REMOTE SENSING
           Keyboard/                                     UNIT

                                                     Power Packet OFDM
                                                     HomePlug 1.0 Standard
                                   MASTER CONTROL
Outside World         Host PC
                                                     2.4 GHz Wireless


                                                      RF REMOTE
                                                     SENSING UNIT
Master Control Unit (MCU)
         MCU Basic Functions
•   LCD: Sensor data, errors, and status
•   Status LEDs: Tx, Rx, Power, Error
•   Liaison between Remote Unit and Host PC
•   Store data when com link is lost (100 Recs)
•   Error monitoring and detection routines
    MCU Module Interfaces

                                  Power Line Modem

                                   General Purpose Serial
                                   Interface (GPSI) 14Mbs
 LCD             Off the shelf
Display         Microcontroller


                                  2.4 GHz RF Modem
        MCU Microcontroller
• Single Board Microcontroller
• Memory to support the following:
  – Buffering and storage of sensor data (record
    size TBA).
  – Operating firmware (code size TBA).
• Ports: 1-GPSI, 2-RS232, 16-GPIO
• Speed to support data movement.
      MCU Power Line Modem
•   Support serial high speed data – 14Mbps
•   Provide P/S for MCU or use single supply
•   FCC approved for industrial use
•   Small and easy to assimilate into MCU
    MCU RF Modem Requirements
•   2.4 GHz FCC Unlicensed Band Operation
•   Support serial high speed data – 250Kbps
•   Single power supply
•   Small and easy to assimilate into MCU
           MCU Power Supply
•   Highly efficient design – switching
•   Will supply all modules with specific needs
•   Strive for single supply solution
•   High likelihood for final design group build
Remote Sensor Unit (RSU)
         RSU Basic Functions
• Monitor sensors, send data when critical threshold
  is reached
• Format and communicate sensor data to MCU
• Respond to commands from MCU
• Status LEDs: Tx, Rx, Power, Error, Low Battery
• Report RSSI to monitor link quality
• Custom PCB
• Unique ID for each sensor
• Original Idea: Radiation Detection
• Possible Sensors:
   – Temperature
   – Wireless Signal Detection
      • Possibly ADL5500
   – Motion
   – Air Quality (eg. Clean Room)
• Board capable of supporting a variety of sensors
              RSU Interfaces
           Additional I/O for         Power Line
          expandability, I2C,          Modem
  ICSP         SPI, etc

                                      General Purpose Serial
                                      Interface (GPSI) 14Mbs
Sensors             Microcontroller
                                      2.4 GHz RF
          RSU Microcontroller
• Same architecture for both boards
    (TI / Freescale / Atmel)
•   Low power consumption
•   At least 2 channel 8-bit onboard ADC
•   Onboard UART
•   Real time clock
•   Ports: 1 GPSI/RS-232/RS-485, 8-16 GPIO,
       RSU Power line Sensor
• GPSI Interface to power line transceiver
  – Possibly using Asoka PL80-9105-001
• If broadband power line communication
  proves to difficult fall back to narrowband.
• AC-DC switching power supply
        RSU Wireless Sensor
• 2.4 GHz wireless communication
  – Using Xbee or RS-232 Wireless Modem
• Battery, Charger, and monitor
  – 9-12 V Lithium-ion Battery
  – Charger Purchased or own design
• DC-DC switching power supply
• Low standby power consumption
        PC Interface
                                                  Power Line
        RF Remote

                                                  2.4 GHz           Power Line
         RF Remote   Traffic

                                                                                           RF Over Power Communication Link

                                   2.4 GHz    -

       GUI on Host PC

We don’t want the system
to be User Friendly. This
way we assure ourselves                                         Master Controller
       job security.                                                  Unit

                                             Serial Interface
    GUI/Host PC Basic Functions
•   Interface through RS232 to the MCU
•   View historic and “real time” sensor data
•   Control data acquisition
•   Store data to database
•   Monitor sensor status (RSSI, Battery life)
•   Error monitoring and detection routines
             GUI Data Viewer
•   Table of detects
•   Detailed info of selected detect
•   Detailed info on most recent detect
•   Get Detect from wireless device
•   Get Detect from power line device
        GUI Sensor Information
•   Battery power (wireless device)
•   Sensor unit RSSI
•   Number of sensors on power line unit
•   Number of sensors on wireless unit
•   ID mapping
    – ID number and corresponding sensor
Host PC RS232 Communication
• Script to read and write to port
  – On read, update database
• Communicates with master controller
• Continuous/Scheduled update
• Fetch data upon GUI request
        GUI - If Time Permits
• Website
  – Data viewing only
  – Way to view data from anywhere
• Historical Info
  – Plot user defined historical data
  – Scatter or bar graph depending on data
     • Ex. Temperature over time
     • Ex. Number of Motion detects/day over 1 week
                   Division of Labor
    Pat Hauser         Joel Keesecker              Mark Kien
Primary               Primary                  Primary
•GUI Development      •Remote Unit Circuit &   •H/W Testing
•PC Interface         PCB Design               •Sensor Development
                      •Research                •Embedded Software
                                               •Project Manager
                                               •Power Supply Design
Secondary             Secondary                Secondary
•Embedded Software    •Embedded Software       •Circuit Design (remote)
•Research             •Power Supply Design
•Testing              •Testing
                        All: Documentation
Condensed Schedule
            Risks & Mitigation
• Noisy lines could make power line
  communications difficult
   – Down grade to narrow band modems or drop Power
     Line Modem option altogether.
• Part availability
   – Address part concerns well in advance of need
• Resources limited
   – Reduce scope and/or leverage additional dev. tools.
Questions / Suggestions

To top