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Vigilant Sensing Technology

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

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Vigilant Sensing Technology

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  1. Vigilant Sensing Technology VST1000 Remote Sensing System Preliminary Design Review Development Team: Patrick Hauser Joel Keesecker Mark Kien

  2. Review Outline • Project Objectives • Motivation • System & Module Descriptions • Division of Labor • Condensed Schedule • Risks & Mitigation • Questions

  3. Project/System Objectives • Seamless turnkey operation • Broadband pipeline for expandability • Selection of narrowband sensors • Clandestine packaging of remote units

  4. Motivations • Provide generic, economical remote sensing ability for use in public safety and medical environments. • Use non-dedicated lines to communicate with the sensors in the field.

  5. System Level Diagram

  6. System Modules • Master Control Unit • RF Remote Sensing Unit • Power Line Remote Sensing Unit • PC Interface

  7. System Interfaces

  8. Master Control Unit (MCU)

  9. 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

  10. MCU Module Interfaces

  11. MCU Microcontroller Requirements • 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.

  12. MCU Power Line Modem Requirements • 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

  13. 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

  14. MCU Power Supply Requirements • Highly efficient design – switching • Will supply all modules with specific needs • Strive for single supply solution • High likelihood for final design group build

  15. Remote Sensor Unit (RSU)

  16. 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

  17. Sensors • 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

  18. RSU Interfaces

  19. RSU Microcontroller Requirements • 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, ICSP/ISP

  20. 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

  21. 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

  22. PC Interface

  23. 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

  24. 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

  25. 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

  26. 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

  27. 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

  28. Division of Labor

  29. Condensed Schedule

  30. 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.

  31. Questions / Suggestions

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