基于单片机超声波测距毕业论文lll530.doc

成都理工大学 毕业设计（论文）报告 题目 基于单片机技术的超声波测距 院 系：核技术及其自动化学院 专业：电气工程及其自动化 学 号 200706050322 姓 名 廖雷 指导教师 李琳琳 起讫日期 超声波测距仪的设计 The design of a Silent Wave Measure Distance 摘 要 近二、三十年,特别是近十年来，由于电子技术及压电陶瓷材料的发展，使超声检测技术得到了迅速的发展。超声波具有聚束、定向及反射、透射等特性。超声检测技术是利用超声波在媒质中的传播特性（声速、反射、衰减、声阻抗等）来实现对非声学量（如浓度、弹性、密度、硬度、粘度、强度、温度、流速、液位、流量、厚度、缺陷等）的测定该系统以空气中超声波的传播速度为条件,利用反射超声波测量待测距离。超声波测距，可以应用汽车倒车、建筑施工工地一些工业现场位置监控，也可用于如液位、管道长度井深的测量等场合。以AT89S52单片机为核心的、低成本高精度微型化数字显示的软件设计硬件电路方法。超声波测距仪 在这些基础上设计了系统的总体方案，最后通过硬件和软件实现了各个功能模块。相关部分附有硬件电路图、程序流程图，经实验证明，这套系统软硬件设计合理、实时性良好、抗干扰能力强，经过系统扩展和升级，可以有效地解决汽车倒车、建筑施工工地以及一些工业现场的位置监控。 关键词：AT89S52; 超声波测距 As technology development needs, increasing living standards improve, speed up urban development, urban water supply and drainage system also has a larger development, continuous improvement of their condition. However, reaction time due to historical reasons to live many unforeseen factors, the drainage system is often lag behind urban development, particularly in urban water supply and drainage system. Therefore, the excavation often a good building facilities have been built to transform the phenomenon of the drainage system. Urban sewage has brought trouble to the people, so to clear the box culvert on the city sewage treatment water supply and drainage systems, human comfort is very important. Ultrasonic distance measurement can not only point and continuous ranging, and can facilitate the provision of telemetry and remote control signals required. Ultrasonic distance measurement techniques can use gas, liquid, solid as a sound transmission medium, and thus have greater flexibility. Ultrasonic ranging device, can be applied to car parking, construction sites and the location of some industrial-site monitoring can also be used such as the level, depth, pipe length measurement occasions. This design is the use of the AT89S52 microcontroller as the core, high-precision, low-cost miniaturized ultrasonic range finder digital displa