The use of ultrasonic distance measurement is a traditional non-contact measurement method. Because it has to be free from outside factor influences and also has certain orientation ability to the environment, simple operation and high precision,the measurements have been widely used.The ultrasonic ranging system is mainly used in reverse, construction site, as well as some industrial scene.
This paper discusses the design of multi-front ultrasonic ranging system based on AT89C51 single-chip with the pulse echo method. By making full use of single-chip system software and hardware resources, the system can automatically launches and receives ultrasonic. According to airborne ultrasound reflection, Piezoelectric ultrasonic sensors to the interface components, application of single-chip technology on the ultrasound in the air to measure the propagation time be able to design a set of ultrasonic ranging system.
First of all, the article briefly introduces the topics background of ultrasonic ranging system, an overview of the development of ultrasonic distance measurement, as well as the basic principles, and introduces the principle of ultrasonic sensors and characteristics.
Then, this part introduces the ultrasonic ranging system of implementation. Based on the introduction to ultrasonic ranging system, the overall composition of the system can be made. Each component of the system hardware and system software architecture is presented in detail.
Finally, the results do the overall design overview and analysis. This includes the causes of measurement error,proposed ways and resolving means and so on.
Key words : ultrasonic ranging; single-chip; ultrasonic sensors;