ECE 445 Track Vehicle Project Team 25: Kuangxiao Gu Jialun Liu Jilin Jiang

Introduction  Railroad project  Scrutinizing and recording the condition of railroad  Our goal: Picture acquisition mechanism

Features  12v marine battery, DC Buck Converter  Automatic picture recording  Instant speed feedback with display  Obstacle Detection  Adjustable vehicle speed

Design Overview

Buck Converter Features: 1) 12v - 5v dc converter 2) 1A maximum output current 3) 10v - 15v input voltage range

Buck Converter  Circuit diagram

Buck Converter  Simulation and Testing

Buck Converter  Simulation and Testing

Ultrasonic Obstacle Detection  Stop the motor when obstacle detected The left PIC is for Obstacle detection module. (PIC16F877A) Input: Ultrasonic sensor(Maxbotix EZ0) Output: Stop signal(LED light)

Ultrasonic Obstacle Detection  Circuit diagram

Ultrasonic Obstacle Detection  Flow chart keep

Demos and Test Procedures Start the vehicle Block the sensor Alarm signal (LED) triggered Move obstacle Further Remove Obstacle

Camera Triggering  Trigger the camera every 30cm  No redundant pictures Speed Encoder PIC Microcontroller Camera Pulse signal GPIO

Camera Triggering  Flow chart

Camera Triggering  No redundant picture

Wireless Speed Display PIC Microcontroller (from speed encoder) Display pad wireless

1.5v power supply 2.LED lights on transmitting 3.7-segment display Wireless Speed Display

Breadboard Transmitter Receiver Frequency Display

Wireless Speed Display

Wireless Speed Display design Before the Design: I.Signal transmits instantaneously II.Stored in a register

Linx Transceiver 1.8-bit of signal 2.Microcontro ller 3.RS bit of signal 5.Serial transmitting

Receiver Test Results Reliability Analog Signal Generator

Future work  Automatic exposure control  Accurate Position Recording  Braking system (mechanical part) 1) braking disk 2) reverse motor operation

Ethical Problem  Battery - environment pollution  Braking system is mandatory

Credits  Prof. Andy Singer  Professor P. Scott Carney  Professor John M. Hart  Mr. Igor Fedorov  Mr. Mark Smart

THANK YOU!