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SP2 INFRASENS WSN Luca Gioanola Maurizio Spirito ISMB (Italy) INFRASENS Partner

SP2 INFRASENS WSN Luca Gioanola Maurizio Spirito ISMB (Italy) INFRASENS Partner gioanola@ismb.it spirito@ismb.it. SAFESPOT. SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008. Table of contents. WSN overview Sensing Node prototypes Measurement campaigns

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SP2 INFRASENS WSN Luca Gioanola Maurizio Spirito ISMB (Italy) INFRASENS Partner

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  1. SP2 INFRASENS WSN Luca Gioanola Maurizio Spirito ISMB (Italy) INFRASENS Partner gioanola@ismb.it spirito@ismb.it SAFESPOT SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008

  2. Table of contents • WSN overview • Sensing Node prototypes • Measurement campaigns • Gateway Node ↔ Sensor Nodes Radio Communication • Planning SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 2

  3. Sensor Node 1 (SN1) Sensor Node k-1 Sensor Node n Gateway Node (GN) WSN overview ISM Snn: sensor node ID (2B) Count: vehicle counter (7b) D: direction (1b) V : speed value (1B) Snn Count D V f = 2.4 GHz Pout = 1 mW , 0 dB Radio module Radio module Radio module Sensors data acquisition A/D conversion Local Detection algorithm Radio module Sensor module Sensor module Sensor module Serial ISMB 1 2 Driver Pre-processing Detection algorithm Ethernet / UDP PC (Server) Detection algorithm and data received partners RSU (Client PC) SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 3

  4. RF Board 5 Sensor Board Pyro 1 Sensor Board AMR 1 14 10 Base Board 14 10 Sensor Board Pyro 2 Sensor Board AMR 2 AMR: Anisotropic Magneto-Resistive Sensor Pyro: Pyroelectric sensor RF Board Sensor Board 1 (AMR1 and Pyro1) BaseBoard Sensor Node prototypes Sensor Nodes v. 1.0 &1.1 (Oct, 2007) Radio module Sensor module Sensor Node v. 1.2 (Jan, 2008. Last and final HW version) Radio module Sensor Board 2 (AMR2 and Pyro2) Sensor module SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 4

  5. Connector to Sensor Board 1 (sx) Temperature sensor Connector to Sensor Board 2 (dx) A/D 16bit convertitor uP 32 bit, core ARM7 USB interface Memory 4 * FRAM 32Kbyte Radio module serial interface Power Sensor Node v. 1.2, Sensor Module Base Board Temperature uP ARM 7 SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 5

  6. Pyro sensor A1 A2 Polarization circuit Connector to Base Board Ax AMR sensor Ay Set-Reset circuit Offset regulation Power Sensor Node v. 1.2, Sensor Module Sensor Board Pyro AMR Connector SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 6

  7. Measurement campaign with Sensor Node v. 1.2 Test site: Italy, Turin – Milan highway junction under construction. Pyroelectric sensors Positive automatic threshold Amplitude (mV) Negative automatic threshold Pyroelectric sensor 1 Pyroelectric sensor 2 Time (s) Set-up characteristics From one to three vehicles was passed with three different velocities: 70, 100, 120 km/h. A few alternatives of the measure points positioning and orientation have been considered. Four versions of local detection algorithm have been evaluated in order to establish which is the most capable of detecting passing vehicles and the speed in both directions for each one of them. Future steps Implementing the 1.2 version of local detection algorithm into the base board. A new measurement campaign using the new algorithm. 1H March SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 7

  8. GN ↔ SN Radio Communication: Messages SN GN Sensor Radio • Data Request • Command:‘Get Data’ • Reply: ‘Send Data d1=i, d2=j, .. dM=w’ • Data Deletion • Command:‘Del Data’ • Reply: ‘Data Deleted’ • Parameters configuration • Command:‘Set Sensor-parameters p1 p2 .. pK’ • Reply: ‘Sensor-parameters set’ • Sensor-status Acquisition • Command:‘Get sensor status’ • Reply: ‘Sensor status s1=x, s2=y, .. sL=z’ An example Get sensor status Get sensor status Sensor status s1=x, s2=y, sL=z Sensor status s1=x, s2=y, sL=z SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 8

  9. Gateway Node Communication between Sensor Network and Server PC 1 2 Each row contains data of a vehicle (data stream of 6 bytes). The Server PC receives a table of N rows, for example, every ten seconds. (Setting other download frequency values is foreseen). When the table isn’t full, the Server PC receives the whole table with some empty rows. The communication between Sensor Network and Server PC is independent from WSN features and performances. The rows and the columns of the table above could perform more than just the data of each vehicle. For example, GW Server PC could have an embedded algorithm, which provides average information of the monitored. Finally, it will be possible adding few more user defined columns. SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 9

  10. Planning 1/2 • Wireless Sensors Network vs 1.0 • Wireless Sensors Network with three Sensing Nodes and a Gateway Node • Preliminary test and characterization in laboratory • Integration between sensing and communication units • Measurement campaign on the road • Detection algorithm and communication protocols improvement • Application modules design and development 2H March SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 10

  11. Planning 2/2 • Wireless Sensors Network vs 1.1 • Wireless Sensors Network with more than three Sensing Nodes and a Gateway Node • Extensive test and performance evaluation in laboratory • Measurement campaign on the road • Application modules integration • Refinement and optimization of detection algorithm and communication protocols • Wireless Sensors Network vs 1.2 • Wireless Sensors Network with from 30 up to 50 Sensing Nodes and a Gateway Node • Extensive measurement campaign on the road End of July SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 11

  12. THANKS SAFESPOT SP2 Meetings Munich, Mar 3-4, 2008 12

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