摘要：介绍了一种基于AT89S52的超声波测距系统。该系统采用HC-SR04超声波模块，以DS18B20传感器测取环境温度，对声速进行温度补偿，提高了测量精度，通过LCD1602显示环境温度和测量结果。详细的论述了系统的组成原理和软件构成。系统由主控芯片，测温单元，超声波传感器模块和显示模块四部分构成，实现测距，测量精度可达0.3cm，测量范围在3cm到400cm。
　　关键词：单片机；温度补偿；超声波
　　中图分类号：TP271文献标识码：A 文章编号：1009-3044(2011)26-6512-02
　　Design of Ultrasonic Range Finding System Based on AT89S52
　　AN Yu-lEi
　　(School of Information, Zhuhai Campus, BEIjing Institute of Technology, Zhuhai 519085, China)
　　Abstract: Introduced an ultrasonic range finding system based on MCU AT89S52. The system adopts the HC-SR04 ultrasonic module, using DS18B20 measuring environment temperature for temperature compensation. Temperature and distance displays on LCD1602. Discussed in detail of the principle of the system composition. The system contains four parts, the AT89S52, temperature measurement unit, ultrasonic sensor module and display module. The measurement precision can reach 0.3 cm, the measurement range from 3cm to 400cm.
　　K

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