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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

Vigilant Sensing Technology

VST1000 Remote Sensing System

Preliminary Design Review

Development Team: Patrick Hauser

Joel Keesecker

Mark Kien

review outline
Review Outline
  • Project Objectives
  • Motivation
  • System & Module Descriptions
  • Division of Labor
  • Condensed Schedule
  • Risks & Mitigation
  • Questions
project system objectives
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 environments.
  • Use non-dedicated lines to communicate with the sensors in the field.
system modules
System Modules
  • Master Control Unit
  • RF Remote Sensing Unit
  • Power Line Remote Sensing Unit
  • PC Interface
mcu basic functions
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 microcontroller requirements
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.
mcu power line modem requirements
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
mcu rf modem requirements
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 requirements
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
rsu basic functions
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 microcontroller requirements
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
rsu power line sensor
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
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
gui host pc basic functions
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
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
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
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
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
risks mitigation
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.