基于超声技术的室内定位设计

本设计以STC89LE52AD单片机和超声换能器为核心,采用时间到达法,移动节点的超声波接收模块和射频发射模块以及固定节点的超声波发射模块和射频信号接收模块。利用三点决定一个平面原理设定三个固定超声波发射点。用射频信号的发射和接收时间作为计时点,根据固定节点超声波发射和移动节点接收到超声波之间的时间差确定固定节点和移动节点之间的间距,实现对移动节点的定位功能。

The core of this design is STC89LE52AD single chip microcomputer and ultrasonic transducer.Adoption of Time arrival method,Ultrasonic receiving module and RF emission module for mobile nodes and Ultrasonic emission module and RF signal receiving module for fixed nodes are used.Using three points to determine a plane principle to set three ultrasonic emission points The launch and reception time of the RF signal is used as the timing point,The spacing between the fixed node and the moving node is determined according to the time difference between the ultrasonic emission and the receiving, So as to realize the positioning of mobile nodes.

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