毕业设计论文基于STC89C52单片机的超声波物位传感器之硬件设计.doc

PAGE 题 目：超声波物位传感器之硬件设计 专 业： 本 科 生： （签名） 指导教师： （签名） 摘 要 随着国家对煤矿安全生产要求的不断提高和企业自身发展的需要，我国矿井基本上都安装了安全监测监控系统，大大提高了矿井安全生产水平。物位传感器为煤矿安全监控系统提供实时物位数据，具有很重要的作用。 本文介绍了一种基于STC89C52单片机的超声波测距系统。由STC89C52单片机、超声波传感器模块、电源模块和LCD液晶显示模块构成了该系统的硬件部分。阐述了超声波测距系统的硬件电路构成及工作原理。该系统硬件结构简单、工作可靠，有良好的测量精度。测量时与被测物体无直接接触，能够清晰稳定地显示测量结果。 超声波具有指向性强，能量消耗缓慢，在介质中传播的距离较远等特点。利用超声波测距具有反应迅速、方便简单、易于实现实时控制等优点，并且，通过实验验证，在测量精度方面能达到工业实用的要求，在煤矿安全监测监控系统中的应用具有重要的现实意义。 关键词：超声波，测距，STC89C52，LCD Subject :The ultasonic thing location of the sensor design of hardware Specialty :Automation Name :Wang Peng (Signature) Instructor: Guo Xiu Cai (Signature) ABSTRACT With the state coal mine safety production requirements and continuously improve their own development needs, Chinas mines are basically installed a security monitoring and control system, greatly improved the level of mine safety. Level sensor for the coal mine safety monitoring system provides real-time object-bit data, play a very important role. The article introduces a microcomputer-based ultrasonic ranging system STC89C52. The system hardware includes the STC89C52 microcontroller, ultrasonic sensor module, power module and LCD liquid crystal display modules. Ultrasonic ranging system described hardware circuitry and how it works. The system hardware structure is simple, reliable, good accuracy. Measurement without direct contact with the measured object, can clearly show stable measurement results. Ultrasound has characters as strong point, low power consumption, slow propagation in the medium distance and so on Using ultrasonic ranging is responsive, convenient and simple, easy-to-real-time control advantages. And the experiments verify the accuracy of practical measures to achieve the requirements of industry in the coal mine safety monitoring system has important practical significance. KEY WORDS：Ultrasonic sensors,Range finder,STC89C52,LCD 目 录 TOC \o 1-4 \h \z \u HYPE