Car Parking Sensor System

As the load of urban traffic system increasingly aggravated accompanying vehicle population increase, the traffic accident caused by backing car became more and more, which often brought the great economic loss to drivers. So it is very necessary to develop the study on the high performance automobile back a car radar. Based on the ultrasonic distance measurement principle and according to the concrete demand of drivers in the car backing process, the performance indexes of automobile back a car radar system was formulated and the whole design scheme was also presented.The hardware and software design was detailed introduced. The hardware circuit based on the SST89E58RD2 single chip as main controller was mainly described in the hardware part, and also the system had been builds in a circuit board. The software design part of the system was divided into several function modules with modular design method, such as main program, temperature measurement module, ultrasonic distance measuring module, LCD display module, and voice alarm module. The main program was responsible for dispatching management all the modules.The system debugging of the hardware and software was implemented at last. Experimental results showed that the measured data was accurate between 30cm and 50cm. Real-time displays of distance and indoor and outdoor temperature and also the obstacle direction is realized with LCD in the system, and also voice prompt is different when distance changed. There are several additional advantages of the automobile back a car radar system, such as high integration, wide measuring range, low cost and so on, which can meet the needs of drivers and reached design requirements. The study on this has certain theoretical value and practical value.