The Research Of Parking Distance Control System

The paper introduces a kind of Ultrasonic Pulse Distance-Measurement Parking Distance Control is system in detail based on microcontroller. The system could measure certain distance with the reflected wave on condition in which the speed of transmitting wave is fixed. It generally specifies the theoretical foundation of the system, the electronic design of the ultrasonic sensor, and the benefits of Fujutsu MB89F538 microcontroller for the system. It is limited in indoor range in advance. So the design of the system and the choice of the components are decided according to this reason.This paper summarizes the development and fundamental principle of ultrasonic detection. Then it presents the theory and characters of ultrasonic sensor. Moreover, it proposes the whole structure of the system by introducing the function of ultrasonic Distance-Measurement. And then the transmission, receiver, detection, channel control, display scheme of this Distance-Measurement system is brought out. The design theory of the thesis take practicability for principal objective, use transmitting-receipting transducer, by means of optical time division multiplexing(OTDM). Overcome the disadvantages of drive voltage too high, bad delicacy and needing add insulation to control transmitting-receipting. Also, this system may work at terribly abominable condition, author take some hardware design for anti-jamming.This paper demonstrates the practicability of the Parking Distance Control is system, analyzes many reasons for affecting precision. Specially, after the application of MB89F538 microcontroller, design and finish the development board and main system board. It analyzes the hardware and software realization of each part in this system. Modular design methodology is applied in the system.,Let this system can arrive at miniaturization and low lost, commercial standard.At last the result and error analysis of the experiments is presented. It is proved by experiments that the design of the system is provided with high accuracy and reliability. In the end, the further measures of modification are presented.