Critical Design Review VST Vigilant Sensing Technologies

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Critical Design Review VSTVigilant Sensing
Technologies

• Joel Keesecker, Mark Kien, Pat Hauser

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Outline

• System Description and Diagrams
• Status Update
• Schematic
• Power Subsystem
• Sensor Interface
• Firmware and Software
• Division of Labor
• Schedule Deliverables
• Parts List and Budget
• Q A

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System Description

• Modular and expandable sensor network utilizing
  RF and power-line communication

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Status Update

• MCU/RSU
• Power system design 80 complete
• Schematic under development
• Sensors
• Generic interface schematic complete
• Embedded Software
• Operation states and sub-modules identified
• GUI
• Visual structure and layout
• COM port communication
• System
• System command set developed

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RSU/MCU Module Diagram
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Board Schematic
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MaxStream Xbee Series 2

• 2.4 GHZ
• Up to 250Kbps
• UART Interface
• 2mW Transmit Power

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Yitran IT800D-SPIM

• DCSK (Differential Code Shift Keying)
• Hardware Forward Error Correction
• Collision Avoidance
• Up to 7.25Kbps
• UART Interface
• Arrived Yesterday

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Prototyping

• Plan to make simple breakout board with MAX233
  and line coupling components to interface PC
  directly with XBee module and SPIM.
• Test basic functionality and config
• Aide software development

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Power System Specifications

• Wide load variation regulated supply
• 3.3V Load Variation 52 mA to 402 mA
• 12 V Load Variation 50 mA to 260 mA
• Uninterrupted operation (All modules)
• High efficiency 3200mAh Li-Ion battery
• Integrated inline charger
• Worst case efficiency is 50

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Power System Block Diagram
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Sensor - Types

• Motion Sensor
• Powered from single 3.3 V supply.
• Produces an interrupt.
• Cell Phone Detector
• Powered from single 3.3 V Supply.
• Produces a V/dB output of the power level
• Temperature Sensor
• Located on sensor I/F board
• Data taken transferred serially over SPI
  interface.

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Sensor Interface Features

• Generic sensor interface for most sensors
• DIP switch to identify sensor type and ID
• Generates interrupt based on analog level
• Noise immunity provided by coax transmission lines

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Sensor Interface
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Embedded S/W - States

• Initialization
• Configure profile
• Run
• Update
• Error

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Embedded Software - Modules

• Read sensor id/type
• Check In
• Set time/date
• Store test profile
• Configure profile
• Check profile status
• Store data record
• Configure interrupts
• Transmit data record
• Receive data record
• Configure modem
• Error handler

• Check charge level
• Read sensor analog
• Read sensor digital
• Update LCD
• Update LEDs
• Send system config
• Terminate profile
• Store system config
• Configure timeouts
• Wait and listen
• Command interpreter

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Embedded S/W High Level Execution
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Embedded S/W Error Handler
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VST1000 - Data Tab
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VS1000 - Sensor Status Tab
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VST1000 - Configuration Tab
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VST1000 - Background Process
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Division of Labor
Pat Hauser Joel Keesecker Mark Kien
Primary GUI Development PC Interface Embedded Software Primary RSU/MCU Board Development Research Primary H/W Testing Sensor Development Embedded Software Project Manager Power Supply Design
Secondary Research Testing Secondary Embedded Software Power Supply Design Testing Secondary Circuit Design
All Documentation All Documentation All Documentation
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Schedule Overview
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Schedule cont.
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Schedule cont.
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Schedule cont.
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Milestone 1

• Sensors
• 2 of 3 sensors tested and working
• MCU/RSU
• Interface board complete
• Rev1 Board populated
• Power system operational
• Firmware
• Able to communicate between Host PC and
  development micro-controller
• Host PC
• COM port communication working
• Data viewer tab done

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Milestone 2

• Sensors
• Ready for integration
• MCU/RSU
• Unit testing complete ready for system
  integration
• Firmware
• Module testing complete
• Host PC
• GUI done but not integrated into system

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Expo

• Demonstrate complete system functionality
• All pieces integrated
• Documentation complete

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Parts List
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Questions?