采用AT89C51 單片機作為控制器，利用超聲測距的原理，設(shè)計了一種超聲波導(dǎo)盲裝置。
該裝置可以對盲人前面道路上的障礙物進(jìn)行距離探測并把障礙物距離信息轉(zhuǎn)換成聲音提示，盲人可以根據(jù)提示聲音的頻率變化的來判斷有無障礙物及離障礙物的距離，達(dá)到導(dǎo)盲作用。
關(guān)鍵詞： 超聲波 ；單片機 ；導(dǎo)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