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Emergency Vehicle Detector for Use in Consumer’s Motor Vehicle. Georgia Institute of Technology School of Electrical and Computer Engineering ECE 4007. Ehren Bendler, Jose Crespo, Tyler Evans, Richard Yee. October 21, 2008. Project Overview.

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emergency vehicle detector for use in consumer s motor vehicle

Emergency Vehicle Detector for Use in Consumer’s Motor Vehicle

Georgia Institute of Technology

School of Electrical and Computer Engineering

ECE 4007

Ehren Bendler, Jose Crespo,

Tyler Evans, Richard Yee

October 21, 2008

project overview
Project Overview

EMV Detector will warn motorist of approaching EMV

EMVs are involved in thousands of accidents per year that are preventable with proper warning

EMV Detector can be used by any motorist

Total estimated cost of project is $51,406.25 including labor and equipment

design objectives
Design Objectives

Capture audio from outside of vehicle

Process signal to determine if EMV is approaching

Detect siren 5dB over ambient noise

Refresh every 2 seconds or less

Use audio and visual (LED) warnings

Fit in dashboard of any vehicle

design flow

EMV Detector

Design Flow

Input Audio

No

Siren?

Output Warnings

Yes

Doppler Shift?

Car Radio

Shut Off Radio

Approaching

Moving Away

Give All-Clear

Turn On Radio

detection algorithm
Detection Algorithm
  • Implement in MATLAB
  • Perform FFT on audio input
  • Look for presence of siren frequencies above ambient noise level
  • Use Doppler shift to determine direction
    • Higher frequency means approaching
    • Lower frequency means moving away
computer specifications
Computer Specifications
  • Motherboard: Intel D945GCLF2
    • 4 USB 2.0 ports
    • Integrated VGA output
    • Realtek ALC662 HD Audio
  • Processor: Embedded Intel Atom 330
    • 2 cores at 1.60GHz
  • Memory: 2GB DDR2-667
led controller
LED Controller
  • Cypress CY8CLED04
    • USB Interface
    • Analog and Digital I/O
    • PSoC Architecture
    • 512 Registers
design analysis
Advantages

Client-side only product

Software can be modified to enhance product in the future

Inexpensive

Disadvantages

Cannot determine distance and location of EMVs

Cannot distinguish between different EMV types

Design Analysis
demonstration plan
Demonstration Plan
  • Demonstrate project in a laboratory setting
  • Use a SPL meter to determine the loudness of microphone input
  • Subject system to standard siren sounds at varying levels of loudness to determine minimum functionality level
  • Subject system to Doppler shifted sirens and ambient road noise
problems
Problems
  • Turning off stereo
  • Delayed parts acquisition
  • Distinguishing between different EMVs
project schedule
Project Schedule
  • Finish hardware and software: 10/31
  • Write final project summary: 11/24
  • Prepare demo: 11/24
  • Write final project report and finalize website: 12/1
current status
Current Status
  • Software correctly detects the wail type siren
  • Hardware is assembled and Windows XP operating system installed
  • Algorithms are being developed to detect other types of sirens