Architecting a Low-Power Wireless Sensor Network by kpj11359

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									Architecting a Low-Power Wireless
          Sensor Network
              NIDays 2009
             Jeremy Twaits
      Technical Marketing Engineer
                yp
   Measurement Types and Sensor
   Requirements
                        Humidity       Serial
                                                     Strain

                                                                  o
                                                                Flow
 Pressure                                        pH
        RTD   Voltage

                                   Digital                    Proximity

                                   Temperature
Speed            Analog                               Current
                                                      C     t

                                                 2
Wireless Application Areas




          Environmental                        Resource                            Industrial
           Monitoring                          Monitoring                        Measurements




  Air/      Water/    Indoor       Power          Solar      Wind Farm    Structural    Machine      Process
Climate      Soil    Monitoring   Monitoring    Monitoring   Monitoring    Health      Condition    Monitoring
                                                                          Monitoring   Monitoring




                                                                             3
The Benefits of Wireless Measurements
   Reduce      • Reduce installation costs and time
    Costs      • Reduce maintenance costs

                 Opt e easu e e t processes
               • Optimize measurement p ocesses
  Increase
  I            • Access data almost anywhere and
  Efficiency     anytime
               • Decrease downtime

               • Overcome power and infrastructure
   Monitor       limitations
  Anywhere     • Solve new and previously challenging
                 applications


                                        4
The NI Wireless Platform


    e ess est
 Wireless Test                     e ess easu e e ts
                                Wireless Measurements
    PXI RF       Wireless DAQ          NI WSN           Third Party




                                                5
Simple. Secure. NI Wi-Fi D t A i iti
Si l S             Wi Fi Data Acquisition.
                   Simple: NI C Series modules with
                     direct sensor connectivity and
                     NI-DAQmx driver software

                   Secure: Highest commercially
                     available data encryption and
                     authentication (WPA2)

                   Wi Fi:
                   Wi-Fi: Streaming waveform
                     measurements over 802.11g or
                     Ethernet network infrastructure

                                   6
  Wireless and Ethernet
  C Series Module Support
Measurement    Module                      Signal                   # Chan       Rate
                  WLS-9205
               NI WLS 9205               l i t         bits
                                ±10 V analog input, 16 bit              32         kS/s
                                                                               250 kS/
Analog Input   NI WLS-9206       600 VDC isolated, 16 bits              16     250 kS/s
               NI WLS-9215    Simultaneous sampling, 16 bits            4     100 kS/s/ch
               NI WLS-9211        Thermocouple, 24 bits                 4        14 S/s
Thermocouple
               NI WLS-9213        Thermocouple, 24 bits                 16     75 S/s/ch
Universal      NI WLS-9219
                  WLS 9219         Universal (11 modes)                 4      100 S/s/ch
Sound/Vibration NI WLS-9234   IEPE (accelerometer), 24 bits             4     51.2 kS/s/ch
Bridge         NI WLS-9237      Bridge completion, 24 bits              4      50 kS/s/ch
                  WLS-9421
               NI WLS 9421    11 to 30 VDC sinking digital input        8    Software timed
                                                                             S f       i d
Digital I/O    NI WLS-9472    6 to 30 VDC sourcing digital output       8    Software timed
               NI WLS-9481        60 VDC, 250 Vrms relay                4    Software timed


                                                                    7
Inspection and Monitoring of Fracture-Critical Steel
Bridges
B id
Application: Researching economical methods for
      p      g              g          p
   inspecting and monitoring the temperature,   ,
   strain, and acceleration of steel-girder highway
   bridges at the Ferguson Structural Engineering
   Lab at The University of Texas

Challenge: Continuous, real-time monitoring of a
   loaded steel bridge several hundred feet long

Products: LabVIEW, Wi-Fi DAQ, and WSN

Key Benefit: Time and money saved by
   eliminating cables and wiring




                                                      8
                                  (   )
What Is a Wireless Sensor Network (WSN)?
                                  (   )
What Is a Wireless Sensor Network (WSN)?
WSN System Architecture
                               LabVIEW



 LabVIEW           WSN      LabVIEW for   Database   Worldwide   Wireless-Enabled
 Real-Time        Gateway    Windows       Servers     Web        Smart Objects




                WSN
             Measurement
                Nodes



                                                     12
    Pond Demo
NIC P d D




                13
NI WSN-9791
                Net ork          Gate a
Wireless Sensor Network Ethernet Gateway
 Features
   2.4 GHz        802 15 4
 • 2 4 GHz, IEEE 802.15.4 radio
 • 10/100 Ethernet
 • Connect up to 36 measurement nodes
 • Outdoor range up to 300 m
 • 9 to 30 VDC power input

 Specifications
 • 2U compact form factor
 • Panel or DIN rail mounting
 • Industrial ratings
      • Operating temperature -30 to 70 ºC
      • 50 grms shock 5 g vibration
 • Status LEDs


                                             14
NI WSN-3202 and NI WSN-3212
Wireless Sensor Network Measurement Nodes
   2.4 GHz IEEE 802.15.4 radio
   • Outdoor range up to 300 m
   • Up to 3-year battery life with 4 AA batteries
         • Optional 9 to 30 VDC power input
   • Configurable as a mesh router
   • Four bidirectional digital I/O lines
   • Industrial ratings
         • Operating temperature -40 to 70 ºC
         • 50 grms shock 5 g vibration
         Node              Analog   Digital      Sample     Sample Rate   Resolution              Features
                            Input     I/O        Interval    (samples/      (bits)
                                                (seconds)     minute)
   WSN 3202
NI WSN-3202                  4        4            1            60           16         Sensor power: 20 mA at 12 V
Analog Input Node                                                                       Input Ranges: ±10 V, ±5 V,
                                                                                        ±2 V, ±0.5 V
NI WSN-3212                  4        4            2            30           24         Supports types J, K, R, S, T,
Th        l I t Node
Thermocouple Input N d                                                                  N, B,
                                                                                        N B E


                                                                                   15
NI WSN Accessories and Starter Kit
• Outdoor Enclosure
         a g pending
     IP rating pe d g
     I/O glands for wire feedthrough
     External antenna                       NI WSN-3291



• NI WSN Starter Kit
     WSN-9791 Ethernet Gateway                NI WSN Starter Kit
     2 programmable nodes
     Sensors and power accessories
     LabVIEW Evaluation Software
     Getting Started Guide


                                       16
    Li D
WSN Live Demo




                17
Software: LabVIEW WSN Module
               y
• Extend battery life
     Transmit meaningful data (threshold, averaging, and deadband)
     Adapt sample and transmission rates to operating conditions
• Perform custom analysis
     Convert raw data into meaningful information
     Interface to sensors
• Reduce response time with embedded
  decision making
     Control actuators without host interaction


                                                    19
Programmable Node Demo
P        bl N d D




                         21
Choosing the Right Wireless
Measurement Pl tf
M           t Platform
                   NI Wi-Fi DAQ           NI WSN
                  (IEEE 802.11g)     (IEEE 802.15.4)
Battery Lif ti
B tt Lifetime         to days
                     1t 2d                to
                                        2 t 3 years
Max. Bit Rate        54 Mbit/s              250 kbit/s
Range                 100 m                  300 m
S    it
Security                802 11i
                   IEEE 802.11i         Gateway
                                        G t
                 (WPA2 Enterprise)     Association


                                       22
       Biofuels f  Al
       Bi f l from Algae
  Algae converts sunshine into chemicall energy
• Al                  hi i      h i
• Why algae as a fuel source?
        Does not rely on commercial crops
        Can be grown on arid land or in the ocean
        More efficient (water and land) than crop-based
        biofuels
• NI WSN hardware used to monitor pH levels
  and control the rate of feed
• LabVIEW WSN software performs data
  analysis and local decision making
  “The newly released WSN product family combines many attractive features … wireless
   networking low power consumption, LabVIEW compatibility, and a flexible I/O portfolio.”
   networking,          consumption          compatibility                     portfolio


                                                                         23
  i    / i l
 ni.com/wireless


   e ess est
Wireless Test                     e ess easu e e ts
                               Wireless Measurements
   PXI RF       Wireless DAQ          NI WSN           Third Party




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