Bicycle Black Box (BBB)

Christopher KiddAnne Marie Carpenter

Advisor: Dr. WileyPreliminary Design Review (PDR)

November 30, 2013EEL 4906 Professional Issues and Engineering Design I

Introduction• Project Objective: To provide bicycle users

with a recording of proof in the event of a collision, theft, or other illegal event

• Benefits include hit-and-run identification and user sense of security with activated captures.

Design ApproachComponents:Accelerometer

digital, 3D, +-6G, +50Hz BW

MicroprocessorRaspberry Pi B rev. 2

Camera25 x 24mm, 1080p, 5Mp

Storage Device SD Card to Pi

A G

Design ApproachSimulation and Design Tools

Labview and PSpice

Example pseudo code//Power switch initializes board#define //set necessary definitionsmain(){ //set camera video quality and data specifications//code video buffer saves and dumps 2 minutes of data frame by frame//assign accelerometer values to desired bit rates, sampling frequency, g

range, etcif (Accel_I2C_pin >= (trigger value)) {

//copy current saved segment to ssd//save following segment to ssd after waiting 2 minutes }

else if (manual_pin_get(1)) {//repeat accel statements }}

Action items

• Purchase Equipment• Simulating a bike being hit • Testing the sensors for sensitivity, deciding on

“hit” values”• LabVIEW simulation• Program Raspberry Pi • Prototype test on bicycle

Timeline: Milestones

1. Sensitivity Testing compared to bike hit simulation

2. Successfully program raspberry pi to recognize all inputs

3. Successfully saving recording footage after any sensor triggers raspberry pi

Summary

Outside San Francisco:Transportation Injury Mapping System reported 83 Hit and Run Accidents in 2011