Blind spot detection
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Blind Spot Detection. Group #7 UGuen Choi , ChangKi Lee ECE 445 Senior Design December 1 2010. Introduction. Blind Spot Detection warns the driver to prevent the accident due to the object in the blind spot

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Blind Spot Detection

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Blind spot detection

Blind Spot Detection

Group #7

UGuenChoi, ChangKi Lee

ECE 445 Senior Design

December 1 2010


Introduction

Introduction

  • Blind Spot Detection warns the driver to prevent the accident due to the object in the blind spot

  • Blind Spot Detection is done by two types: image processing and ultrasonic sensor


Features

Features

  • MCU determines approaching of the object

  • Ultrasonic sensors

  • Use audio output signal from PC instead of RS232

  • Image processing from Camera to detect the car


System overview

System Overview

  • Hardware

    • Voltage Regulator

    • Sensor and MSP430

    • Voltage Amplifier

    • Warning Indicator

  • Software

    • A/D convertor

    • Calculation for approaching of the object


Blind spot detector

Blind Spot Detector


Hardware overview

Hardware Overview

  • Voltage Regulator

    • Regulate 9V battery to 3.3V and 5V for IC chips

  • Sensor

    • Sending analog signal to MCU

  • MSP430

    • Get all input signals and send output signals

  • Voltage Amplifier

    • Amplify the audio signal from PC

  • Warning Indicator

    • Current amplifying for practical output


Schematics

Schematics


Blind spot detection

Voltage Regulator

Sensor

Using either 3.3V or 5V, but use 5V to get further detection

Have envelop signal and analog signal for testing

  • Regulate 9V voltage to 5V and 3.3V for components

  • Capacitors are crucial otherwise, it will get burn


Blind spot detection

MSP430

Voltage Amplifier

Voltage for audio signal is between 100mV and 400mV

Audio signal is AC

Need rectifier and amplifier to get clear signal for MCU

  • Convert analog signal to digital signal using integrated A/D convertor

  • Calculate approaching of the object

  • Get analog signal from sensor and audio signal from PC

  • Get “gear” and “turning signal” from the user

  • Send output signal for warning to the driver


Voltage amplifier

Voltage Amplifier

Audio Signal

Filtered Output


Voltage amplifier1

Voltage Amplifier

After Voltage Amplified

Down-powered Voltage


Distance determination

Distance Determination

1 foot

2 feet


Blind spot detection

3 feet

5 feet

4 feet

6 feet


Unable to determine an object in special case

Unable to determine an objectin special case

Standing in front of wall

No object in front of wall


Define the failure of detecting an object at far distance

Define the failure of detecting an object at far distance

Data table

Data graph


Software overview

Software overview

  • MSP430 program

    • A/D convertor

    • Counter

    • Pin recognition

    • Variable


Flow chart

Flow Chart


Counter

Counter


A d convertor

A/D convertor


Future improvement

Future Improvement

  • Pick a different sensor to be more practical in closed space situation

  • We may change the type of sensor to be more precise on detecting an approaching object


Future improvement1

Future Improvement


Future improvement2

Future Improvement


Question

Question?


Thank you

Thank you

The end


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