Abstract: Intelligent control can be run automatically in a pre-set environment without human management. It can be applied in the use of scientific exploration. Based on the simple single-chip smart car is one embodiment.
Based on single-chip smart car simple ultrasonic ranging system can automatically avoid obstacles. The system was designed by combining the software and hardware. The 40KHz Pulse signal was generated by software in the single-chip microcomputer AT89C51. Then the pulse signal was converted into ultrasonic wave and launched by hardware.The ultrasonic wave would return when it met the obstacle.The return signal was received by AT89C51. Then the distance was judged by single-chip microcomputer. If the car was in dangerous range, it would be controlled to avoid obstacle.
The design result is quite ideal. The car can avoid obstacles accurate in the dangerous distance. This technology can be applied to the automotive industry so that the car will be more safety.
Key words: Intelligent; Ultrasonic wave; AT89C51