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Threat Verification - NAVATA Design Presentation

Networked Advanced Vehicle Anti-Tamper & Alert System. 2011- Vermont Technical College Electro-Mechanical Senior Project. Threat Verification - NAVATA Design Presentation. Tim Quinn, Jacques Dupuis, Henry Mossell. Table of Contents. Background Problem Statement Solution Statement

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Threat Verification - NAVATA Design Presentation

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  1. Networked Advanced Vehicle Anti-Tamper & Alert System 2011- Vermont Technical College Electro-Mechanical Senior Project Threat Verification - NAVATADesign Presentation Tim Quinn, Jacques Dupuis, Henry Mossell

  2. Table of Contents • Background • Problem Statement • Solution Statement • Array Placement Concept • System Overview • Sensors Evaluated • Mechanical Design • Original and Final • Assembly • O-ring Gland Design for PIR door • Verify O-ring Seal • Electrical Design • Microcontroller Circuit Board Schematic • Microcontroller • Actuator Subsystem • CAN Communication Subsystem • Software Design • States, Inputs, and Outputs • State Diagram • Schedule • Cost of Engineering and Design • Questions

  3. Background • Deployed Vehicles Unattended • Vehicles tampered with unattended • A vibration sensor is currently employed • Wide open spaces and wind gust • Not immune to vibrations due to wind • False alarms • Determine an actual threat from wind gusts

  4. Problem Statement • Check Feasibility of Different Sensors • Discrete Package • Robust • Water Proof • Easy to Replace • Sensitivity • 5 Volt • Max current 0.577 A • Detection is directly under the Vehicle

  5. Sensor Evaluation Maxbotix LV-EZ0 Gust detector using a ping- pong ball and optical sensor Pitot Tube Pressure Sensor Freescale MXP2010 PIR

  6. Solution Statement • To design a system that uses a Passive Infrared Sensors (PIR) • An array of PIRs shall be installed on the under carriage • Create a detection envelope directly under the vehicle • The sensors will only be deployed when the alarm is activated

  7. System Overview • Person crawls under vehicle to tamper with it • PIR detects persons movement under vehicle • Sends threat verification signal through the CANbus • Threat is detected

  8. Sensor Array Concept These beams are not actual but a visual concept of the array and detection envelope

  9. Maximum Sensor Detection Envelope • Elliptical Shape • 50 ° x 41 ° • 2*(18’’*Tan 50 °)= 42.8’’ • 2*(18’’*Tan 41°)= 31.2’’ • Volume • π*31.2’’*42.8’’*18’’/3 = 25170 in³

  10. Mechanical DesignOriginal and New Design Original Design New Design

  11. Mechanical DesignAssembly

  12. Mechanical DesignO-ring Gland Design for PIR door • Dimension's modeled after recommendations • from Parker O-Ring Handbook • Actuator Retracted • Submerged • No Leaks

  13. Mechanical DesignVerify 80 N (17 lb-force) to Compress Viton O-ring 40 % 30 % 20 % Durometer of 60 to 70 Highlighted 10 % 5 % Parker O-ring Handbook

  14. Electrical Concept External I/O PIR External I/O CAN Transceiver Freescale MSCAN Microprocessor CANH CANL CANsleep Config Out Background Reset CANH CANL CANsleep Config IN H-Bridge Crystal Oscillator Linear Actuator

  15. Electrical DesignMicrocontroller Circuit Board Schematic Actuator Subsystem Microcontroller CAN Communication Subsystem

  16. Electrical DesignMicrocontroller • MC8S08DZ60AMLC • 2.5 V – 5.5 V • 32 Pin • 26 I/Os • CAN Capable • Surface mount Reset Background Config Out Oscillator Config In Ground +5 V Disable 1 CANsleep Enable Actuator Position IN2 Current Feedback IN1 To H-Bridge Receive CAN Transmit CAN PIR High

  17. Electrical DesignActuator Subsystem • MC33887 • H-Bridge • 5 Amp • 5 V – 28 V • Current Feedback at 1/375 of actual • L123010006P • Linear Actuator • 30 mm Stroke Length • 100:1 Gear Ratio • 5 V – 6 V Operating Voltage • Position Feedback IN1 Current Feedback +5 V Position IN2 Actuator Position Actuator Position Disable 1 Out 1 Out 1 Enable Ground Position Out 2 Out 2 +5 V

  18. Electrical DesignCAN Communication Subsystem • MCP2551 • CAN Transceiver • 75 mA Maximum Input Current • 5 V – 28 V Operating Voltage • Oscillators • 4 MHz crystal Receive CAN 120 Ω Transmit CAN Microprocessor CANH CANL RS/CANsleep +5 V

  19. Software - I/O, States, Timers

  20. Device Fail Retract Power Off Power On Deployed 1000 0000 0001 0000 0100 Possible Threat 0000 Tact Expired && Current ≥ 250 mA && Pos ≤ 0.42 V Vehicle == OFF Threat Verified PIR != 0 0010 PIR == 0 && Tpir Expired Tact Expired && Current ≤ 250 mA // Pos ≥ 0.42 V Manual Reset PIR != 0 && Tpir Expired Manual Reset Vehicle == On Tact Expired && Current ≤ 250 mA // Pos ≤ 4.70 V Tact Expired && Current ≥ 250mA && Pos ≥ 4.70 V Software Design State Diagram

  21. Schedule Pushed project out 3 weeks

  22. Cost of Engineering and Design

  23. Thank you • Applied Research Associates • Mr.CoryKreig, New Products Group Leader • Mr.John-Mike Taylor, Assistant Director ARA New England Division • LEDDynamics • Mr. Sam Colwell • FujiFilmDimatix • Mr. Eric Robinson • Prof. Andre St.Denis, MSEE • Mr. Carl Wolf, MSME • Mr. Theodore Keppner

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