Abstract

Reversing range finder is a single-chip control of the car parking safety aids. The range finder combines the real-time control and data processing functions of the microcontroller with the ultrasonic distance measurement technology and the sensor technology to measure and display the distance of the vehicle in the rear of the vehicle and send it with the intermittent "beep" Alarm, "beep" sound gap with the obstacle distance narrowed, the driver can not only directly observe the distance displayed, but also can be judged by the car after the obstacle from the vehicle near the distance, the lifting of the driver parking and start Vehicles around the visit caused by the troubled, and can help the driver to remove the visual field deadline and blurred vision to improve the safety of driving. This topic mainly includes the design of the main control module of the single chip, the design of the ultrasonic transmitting and receiving module and the display module and the design of the audio alarm module.

Now on the market reversing range finder mostly use ultrasonic distance measurement principle, under the control of the controller, the ultrasonic signal is transmitted by the sensor, and when the obstacle is encountered, the echo signal is generated. After receiving the echo signal, the sensor is carried out by the controller Issued by the processing to determine the location of the obstacle, the display by the display distance, images and other warning signals issued by the timely warning, so that the driver reversing to be aware of the number, so that reversing becomes safe and easy.

This paper introduces a single-chip ultrasonic distance measurement reversing auxiliary system, the system can accurately measure the distance between the rear and the obstacles to guide the driver safety reversing.

 

Key words: ultrasonic; single chip microcomputer; ranging