The Development of Ultrasonic Distance Measuring System
Abstract：The ultrasonic distance measuring technology is free of light effect, and has advantages of simple structure, low costs, simple reliable information processing etc; it also has certain adaptive capacity for measured things which are in abominable environment, such as dark, poisonous, smoggy. Hence, this technology is widely applied. This paper has presented a microcontroller-based single-pulse reflection ultrasonic distance measuring system. The ultrasonic sensor’s basic principle and characteristics are expounded in the paper, regarding the range measuring system ultrasonic wave frequency, the signal pulse, the component models and so on the main parameter has carried on the discussion; and in the foundation of introducing ultrasonic distance measuring system functions, the total system constitution was proposed and hardware design proposal of the system launching, receiving, examination and displaying modules are demonstrated. According to the system requests, the system the algorithm is designed by modular the programming mentality, the ultrasonic launching and the distance-amplitude displaying function is completed. Finally through software and hardware synthesis debugging, the basic measuring function of the system in short range is realized.
Key words : Ultrasonic distance measuring, Sensors, Microcontroller
