The system implemented parking space detect by using ultrasonic, The ultrasonic installed on the vehicle left/right sides. left/right parking spaces can be detected with precise trajectory estimation. The system can measure width and length of the parking space and provide drive more accurate parking information with large, medium and small three parking space levels judgment.

1. Parking space level judgment: small (5m~6m), medium (6m~8m), large ( > 8m).
2. Accurate vehicle position with wheel speed estimation, precision up to 5cm.
3. Car-PC/TI DSP/ADI DSP HMI embedded system.
4. Vehicle speed 20kph.
5. CAN bus interface with baud rate 500 kbit/sec.

Parking space measurement and judgment/ mobile security robot environment judge/ object length measurement…etc.

5m ultrasonic calculates car moving distance with vehicular, build accurate dynamic space measurement technique, increase value added of high tech application, low cost, has high opportunity to integrate into finished automobile and after marketing, which can help automobile electronics industry technique level improve in Taiwan.