Ultrasonic Distance Measuring Technology has been widely used in our social life, such as reversing remind, distance measuring of construction and industrial sites. Although the current measuring range could reach to hundred meters,the accuracy of measuring could only reach to cm magnitude, for those reasons above, the demands of high-precision ultrasonic distance measuring system is growing rapidly.
This article provides an overview of the development and the basic principles of ultrasonic testing, introduces the principle and characteristics of ultrasonic sensors. The key parameters of ranging system have been discussed. On this basis, I have contrasted and made a choice for time measurement program, studied on the overall composition of the system, demonstrated the design of all the launching and receiving parts. At the end I present the application of Single-chip in this system, and have designed the realization of all the hardware and software of Ultrasonic Distance Measuring Alarm System parts.