通过发射42KHz或者40KHz的超声波信号,然后在信号接触到探测物体之后声波返回探测模块,然后模块计算这个时间算出距离,但是模块无法判断返回的声波是否为自己发出来的。 所以可以通过另外一个模块伪造探测返回的波形,让探测的模块得出错误的距离
汽车上倒车雷达普遍用42KHz
市面上常见的超声波探测模块40KHz
避障小车
光电开关也是用这种方式去探测的,倒车雷达探测如果距离过近会被判断成无任何障碍物!!
This project forked from mobier/ultrasoundattack
伪造超声波模块探测距离
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