基于超声波的盲人导盲系统的设计

摘要

In order to avoid the interference problem receiving equipment appear to use infrared automatic perceived barriers equipment itself actively send the signal, the design of a portable device, the blind when walking to the device worn on the arm, or installed on a crutch, the device can real-time detect whether there exist obstacles within a distance in front. And by the voice system sends reminders, can effectively avoid the blind man hit the barrier and the injuries. Ultrasonic wave has strong direction, energy easy to set in, communication distance, and has certain accuracy, relatively small volume, convenient carrying, low price and other characteristics of the obstacles by using ultrasonic distance measurement positioning, design and implementation of the blind guide device, has a certain practical value.%为了避免使用红外线自动感知障碍设备时出现的接收设备本身主动发送信号的干扰问题，设计一种简易便携装置，盲人在行走时把此装置戴在手臂上，或者安装在拐杖上，该装置能够实时探测前方一段距离内是否有障碍物存在，并由语音系统发出提醒，可以有效地避免盲人撞到障碍物而受伤的情况。超声波具有方向性强、能量易于集在中、传播距离较远，以及对障碍物定位具有一定的精确性、体积相对较小、方便携带、价格低廉等特点，采用超声波测距实现盲人导盲器的设计，具有一定的实用价值。