超声波导盲器的设计

采用AT89C51 单片机作为控制器，利用超声测距的原理，设计了一种超声波导盲装置。
该装置可以对盲人前面道路上的障碍物进行距离探测并把障碍物距离信息转换成声音提示，盲人可以根据提示声音的频率变化的来判断有无障碍物及离障碍物的距离，达到导盲作用。
关键词： 超声波 ；单片机 ；导盲
Abstract: This article recommends a device of ultrasonic wave guide which is designed
to adopt AT89C51 single-chip microprocessor computer as controller and apply the
principle of ultrasonic distance measuring. The device can detect the distance between
the blind and an obstruction in the road ahead and convert the message to a sound
reminder .According to frequency variation of the reminding sound, it will enable the
blind to judge whether there is an obstruction and the distance from the obstruction
then accomplish the purpose of guiding the blind.
Key words: Ultrasonic wave ；Single-chip microprocessor ； Guiding the blind