基于单片机的电子测距系统设计.docVIP

中国知网查重5% 基于单片机的电子测距系统的设计 电子测距系统设计（软、硬件） 中 文 摘 要 当前电子测距所采用的方法主要有红外线测距、激光测距和超声波测距等，其中激光测距法相较其他测距系统的性能是比较优越的，但因其价格过高，目前生活中使用很少。本设计考虑到倒车测距需具有较快的反应时间和很强的排干扰能力，所以超声波测距是最佳的方案，它也被广泛使用于工、农业等领域。 本篇论文利用超声波测距原理，结合超声波传感器和STC89C52单片机的性能，进行合理的电路设计。系统可以实现超声波测距，并用温度传感器进行温度补偿，在规定距离内实现声光报警，最终在液晶屏上显示温度和距离。整个系统的电路结构易懂，各方面的参数也达到应用的标准[1]。实际使用时，利用电子测距仪的检测和报警来及时提醒驾驶人员，需要精准的报警和简单的方式让驾驶人员轻松操作，最终以减少一些不必要事故的发生，让人们的安全得到保障。 关键词：超声波；单片机；STC89C52； Electronic measure distance system (Hardware and Software) ABSTRACT The current method of electronic distance measurement used mainly infrared , laser and ultrasonic ranging distance measurement, the method of laser ranging which compared the performance of other ranging system is more superior, but because the price is too high, the current life use very little. The design considerations need to reverse Ranging faster reaction time and has a strong platoon interference, so the best option ultrasonic ranging, it is also used in the field of engineering and geoponics become more and more widely . In this thesis, we use the theory of ultrasonic ranging , combined with ultrasonic sensors and STC89C52 MCU performance,to design a reasonable circuit . The system of Ultrasonic ranging can achieve temperature sensor, temperature compensation can realize within a specified distance alarm of the acousto-optic , temperature and distance in the final display on the LCD screen. Circuit structure of the whole system to understand all aspects of the parameters are up to standard applications. Actual use, the use of electronic rangefinder timely detection and alarm to alert the driver, the police need accurate and simple way to make it easy for the driver to operate, and ultimately to reduce the unnecessary accidents to happen, so that peoples safety is guaranteed. KEY WORD: Ultrasonic; controller;STC89C52; 目 录 第一章 绪论 1 1.1 研究背景 1 1.2 研究目的和意义 1 第二章 超声波测距原理 2 2.1超声波传感器 2 2.1.1 超声波传感器的原理 2 2.1.2 超声波传感器的特性 2 2.2 超声波测距原理 3 第三章 测距方案比较和单片机简介 4 3.1 基于单片机的超声波测距系统