摘要超声具有方向性强、能量消耗慢、传播距离长等优点。因此，超声波测速是传感器技术与自动控制技术相结合的最常用的方法。它广泛应用于路边监视、倒车雷达等领域。随着科学技术的飞速发展，超声在速度测量中的应用将越来越广泛。它将朝着更高的精度发展，以满足社会日益增长的需求。本文详细介绍了超声波传感器的原理和特点，以及 STC 公司 STC89C52 单片机的性能和特点。在分析超声波测距原理的基础上，指出了测速系统设计中应注意的问题和思路。介绍了基于 STC89C52单片机的低成本、高精度、小型化数字显示超声波测速的硬件电路和软件设计方法该系统电路设计合理，工作稳定，性能好，检测速度快，计算简单，易于实时控制，能满足工业应用对测量精度的要求。关键词：超声波，单片机，STC89C52，测速 Abstract Ultrasonic wave has strong pointing to nature ,slowly energy consumption ,propagating distance farther ,so, in utilizing the scheme of distance finding that sensor technology and automatic control technology combine together ,ultrasonic wave finds range to use the most general one at present ,it applies to guard against theft , move backward the radar , water level measuring , building construction site and some industrial scenes extensively。With the rapid development of science and technology, ultrasound will be more widely applied in the range finder . It will be toward more high set Precision of direction, in order to meet the growing needs of the community. This subject has introduced the principle and characteristic of the ultrasonic sensor in detail ,and the performance and characteristic of one-chip computer STC89C52 of STC Company ,and on the basis of analyzing principle that ultrasonic wave finds range ,the systematic thinking and questions needed to consider that have pointed out that designs and finds range ,provide low cost , the hardware circuit of high accuracy , ultrasonic range finder of miniature digital display and...
