随着社会的发展以及科学技术的进步超声波测距在实际中的应用也变得越来越重

随着社会的发展以及科学技术的进步超声波测距在实际中的应用也变得越来越重要，例如汽车倒车时对距离的测量、机器人对障碍物的避让以及工业中对液体高度、井的深度、管道的长度等的测量。从而使超声波测距的研究有很重要的现实意义。<br>本文在系统设计部分主要分为两部分，分别是从机和主机。从机的主要作用是对采集的数据进行处理和测量，并在nRF24L01的协助下发送给主机。主机的主要任务是接收超声波并在液晶上进行显示，而且还能通过三键完成报警距离的参数设置。当测量的距离相对较小时，发光二极管就会发生报警。从而实现主机与从机之间数据的传输以及实现远距离的测量。<br>通过设计实现以上描述的功能，可以深化学生对单片机理论知识的理解并且该系统成本低且便于学生制作，可以作为对学校实验项目的补充。<br>关键词：STC89C52；超声波；无线通信

随着社会的发展以及科学技术的进步超声波测距在实际中的应用也变得越来越重要，例如汽车倒车时对距离的测量、机器人对障碍物的避让以及工业中对液体高度、井的深度、管道的长度等的测量。 从而使超声波测距的研究有很重要的现实意义。<br>本文在系统设计部分主要分为两部分，分别是从机和主机。 从机的主要作用是对采集的数据进行处理和测量，并在nRF24L01的协助下发送给主机。 主机的主要任务是接收超声波并在液晶上进行显示，而且还能通过三键完成报警距离的参数设置。 当测量的距离相对较小时，发光二极管就会发生报警。 从而实现主机与从机之间数据的传输以及实现远距离的测量。<br>通过设计实现以上描述的功能，可以深化学生对单片机理论知识的理解并且该系统成本低且便于学生制作，可以作为对学校实验项目的补充。<br>关键词：STC89C52；超声波；无线通信

With the development of society and the progress of science and technology, the application of ultrasonic distance measurement in practice has become more and more important, such as the measurement of distance when reversing cars, the avoidance of obstacles by robots, and the measurement of liquid height, well depth, pipe length in industry. So the research of ultrasonic distance measurement has very important practical significance.<br>This paper is divided into two parts in the system design, namely, slave and host. The main function of the slave is to process and measure the collected data and send it to the host with the help of nRF24L01. The main task of the host is to receive the ultrasonic wave and display it on the LCD, and to set the parameters of the alarm distance by three keys. When the measured distance is relatively small, the LED will give an alarm. So as to realize the data transmission between the host and the slave as well as the remote measurement.<br>Through the design and implementation of the functions described above, students can deepen their understanding of the theoretical knowledge of single-chip microcomputer, and the system is low-cost and easy for students to make, which can be used as a supplement to school experimental projects.<br>Key words: STC89C52; ultrasound; wireless communication<br>