毕 业 设 计 毕业设计题目：超声波测距仪的设计学生姓名： 学 号：系 别：专业班级： 指导老师姓名及职称：起止时间：摘 要现代的社会已经进入了飞速进展的阶段，人们在各个领域对测距仪的应用，有越来越广泛的需求。针对愈发广泛的应用需求，设计一种经济有用﹑准确度高﹑响应灵敏的测距仪很有必要，而本文设计的超声波测距仪恰好满足以上要求。由于超声波具有指向性强和传送距离远等优点，人们很容易利用超声波制成测距仪。为了实现测距功能，本设计以 AT89S51 芯片为核心，再结合 4 位一体共阴 LED 数码管、超声波传感器模块和12.0M 晶振等器件。系统里包括了单片机系统，LED 显示电路，复位电路以及超声波发射接收电路。关键词 超声波 测距仪 AT89S51 芯片AbstractModern society, has entered a stage of rapid development. Application of range finder in many fields , has a growing demand. In order to meet the increasing demands , it is necessary to design an economical range finder, which has a high accuracy and a sensitive response. The ultrasonic range finder designed in this thesis just satisfies the above requirements. Because of good directivity and long transmission of ultrasonic, it is easy to fabricate an range finder by ultrasonic. In order to achieve the function of measuring distance , ultrasonic range finder is designed with AT89S51 chip as the core. It also contains four in one common cathode LED digital tube, ultrasonic sensor module, and 12.0M crystal . The ultrasonic range finder is made up ofa single-chip system, LED display circuit, reset circuit, and an ultrasonic transmitting and receiving circuits.Key words：Ultrasonic Range finder AT89S51 chip目 录第 1 章 绪论......................................................11.1 设计的背景..................................................11.2 设计的意义..................................................1第 2 章 超声波测距原理..........................................22.1 超声波简介.......
