1、 1 摘要摘要 本文详细介绍了一种基于 AT89C51 单片机的脉冲反射式双传感器超声 波测距系统设计,具体内容为测距单元硬件设计和单片机应用程序设计; 该系统是以空气中超声波的传播速度为确定条件,利用发射超声波与反射 回波的时间差来测量待测距离。 本超声波测距系统设计基于 Polaroid 6500 系列的超声波传感器及其 驱动模块两套,设计以 AT89C51 单片机为核心的超声波测距电路,能实现 多模式距离测量与温度补偿以及距离结果显示,并且能够以串行通信方式 将处理后的测距数据信号传送到 PC 机,并从 PC 机接受控制信号。 本系统安装使用方便,价格便宜,并可与遥测遥控系统配合使用,有
2、 较广阔的应用前景。 关键词关键词: : 超声波,超声波传感器,超声波测距系统,AT89C51 单片机,温度 补偿。 2 ABSTRACTABSTRACT The thesis introduces a kind of single-pulse-reflection double- -ultrasonic sensors distance measurement system design in detail based on the AT89C51 SCM. The specific contents are the designs of hardwares unit and applica
3、tion of the SCM; This system could measure certain distance with the time between transmitted wave and reflected wave on condition in which the speed of transmitting wave is fixed in room。 The ultrasonic distance measuring system is based on the Polaroid 6500 series of ultrasonic sensors and two set
4、s of drive module, the design has used taking the AT89C51 SCM as the core of ultrasonic ranging circuit, to achieve multi-mode distance measurement and temperature compensation, the results displayed by LED. And sent the ranging data signals to the PC by the way of Serial communication after the sig
5、nals been dealt with, accept controlling signals from the PC. This system is easy to be installed and applied,low in Price and capable of being used in combination with the systems of telemetering and telecontrolling ,and it has extensive application prospects. Key Words:Ultrasonic wave,Ultrasonic sensor, Ultrasonic distance-measurement system,The AT89C51 SCM,Temperature compensation. * 论文 目录 0 目录目录 第第 1 1 章章 绪论绪论 1 1.1 课题的提出 1 1.2 超声测距技术的研究情况及其发展2 1.3 本课题的研究内容及其意义3 第第 2 2 章章 超声波测距技术综述超声波测距技术综述5 2.1 超声波简介5 2.2 超声波测距的一般原理和方法6 2.3 超声波传感器的主要参数及选择7 第第 3 3 章章 超声测距系统总体设计方案超声测距系统总体设计方案