毕 业 课 程 设 计题目： 超 声 波 测 距 姓 名：_ _ 所在学院： 所学专业：_ 电气工程及其自动化 班 级 ___08 级 02 班 学 号 __ _ 指导老师：____ 完成时间：____2025.12.15 摘要现今超声波测距已被应用在现实生活的各个领域。它与传统的测距方法相比精确度更高、操作更方便、安全系数更高。超声波测距是一种利用声波特性和电子计数相结合来实现距离测量的方法。本次课程设计主要介绍以 AT89C51 为核心的超声波测距系统。测距系统主要由超声波发射电路、超声波接收检测电路和显示电路组成。设计利用 51 单片机系统的 I/O 口，发出 40MHZ 的超声波，反射回来的超声波信号，经过放大和整形电路进入单片机，比较调试后确定其对应的距离，完成测距。可实现距离在 3m 内，盲区 7cm 的有效测距，测量精度为 1cm,测量时与被测物体无直接接触，能够在 LED 上稳定的显示测量结果。该测距系统测量精度高，使用方便，可应用于汽车倒车雷达、建筑施工施工场地以及一些工业现场的位置监控，也可用于如液位、井深、管道长度的测量等。Nowadays ultrasonic ranging has been used in real life in all areas. It compared with traditional ranging accuracy is higher, operation methods more convenient and safety coefficient. Ultrasonic ranging is a use of acoustic properties and electronic counting combination to achieve distance measurement method. This course mainly introduces the design USES AT89C51 as the core of ultrasonic ranging system. Distance measuring system mainly by ultrasonic launching circuit, ultrasonic receiving detection circuit and display circuit composed. Using 51 SCM system design of I/O mouth, issued 40MHZ ultrasonic, reflected ultrasonic signals, amplified and plastic circuit into microcontroller, comparative after testing to determine its corresponding distance, complete range. Can realize distance for 3m, blind area within the effective range-finding 7cm, measurement accuracy for measuring 1cm, with no direct contact with the object to be tested, can be in LED d...
