基于51单片机的超声波测距仪的设计参考.docVIP

摘 要 随着科学技术的快速发展，现在距离测量已经是一项非常重要的技术，已经应用到各行各业当中，尤其是非接触式测量，从汽车雷达到建筑施工工地Abstract With the rapid development of science and technology, todays distance measurement is a very important technology, which has been applied to all walks of life, especially non-contact measurement, from the automotive radar is used to construction sites and submarine sonar, ultrasonic ranging. Looking forward to the future ,as an important tool,the ultrasonic rangefinder will be a great space for development in all aspects. The design is based on the 51 MCU technology ,which realizes in front of the object distance measurement by using the ultrasound technology. Ultrasonic points to strong energy slow propagation in the medium distance, less interference by external conditions. The system uses ultrasonic sensors to sense objects in front, through the program the microcontroller in transmitting and receiving ultrasonic sensor ultrasonic signal analysis and calculation processing, the final data will be processed in the LCD display. AT89S51 microcontroller based ultrasonic ranging system, the system based on ultrasonic propagation in the air emission principle, the ultrasonic sensors of the interface components, application of microcontroller technology with ultrasonic propagation in the air to measure the distance of the time difference in order to design a set of automatic ultrasonic Ranging system. Ultrasonic transmitter circuit of the system by transmitting ultrasound to the measured object, from the ultrasound receiving circuit to receive the reflected ultrasound, ultrasound through the MCU timer records the measured object and the rangefinder in the time between the transmission, which can function using SCM Calculation function to calculate the measured distance between the object and the rangefinder. Keywords: 51 MCU； SensorUltrasonic Sensor； Telemeter 目 录1 绪论 1 1.1 选题背景及研究意义 1 1.2 超声波测距的发展 1 1.3研究步骤及方法 1 2 系统的方案论证 2 2.1 系统的设计要求： 2 2.2 系统设计的目的 3 2.3 系统的工作原理 3 2.4 超声