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Blind Spot Detection

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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  1. Blind Spot Detection Group #7 UGuenChoi, ChangKi Lee ECE 445 Senior Design December 1 2010

  2. 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

  3. 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

  4. System Overview • Hardware • Voltage Regulator • Sensor and MSP430 • Voltage Amplifier • Warning Indicator • Software • A/D convertor • Calculation for approaching of the object

  5. Blind Spot Detector

  6. 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

  7. Schematics

  8. 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

  9. 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

  10. Voltage Amplifier Audio Signal Filtered Output

  11. Voltage Amplifier After Voltage Amplified Down-powered Voltage

  12. Distance Determination 1 foot 2 feet

  13. 3 feet 5 feet 4 feet 6 feet

  14. Unable to determine an objectin special case Standing in front of wall No object in front of wall

  15. Define the failure of detecting an object at far distance Data table Data graph

  16. Software overview • MSP430 program • A/D convertor • Counter • Pin recognition • Variable

  17. Flow Chart

  18. Counter

  19. A/D convertor

  20. 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

  21. Future Improvement

  22. Future Improvement

  23. Question?

  24. Thank you The end

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