原理图中并接在超声波接收头两端的瓷片电容不用的话可以增强信号，但是抗干扰性不强。我的做法是牺牲抗干扰性，提高距离，呵呵，没办法只能这样了。另外还有要说明的是发送与接收探头的距离是8个cm！！这样才能保证测量距离，我做好的测距距离是接近6米。发送与接收探头的距离可能还可以小一点，但不能小于4cm（网上说的），我做过间距为2cm的时候测距距离为3米左右-Schematic diagram of the ultrasonic receiver and then the first ceramic capacitors at both ends so no need to enhance the signal, but do not have a strong anti-interference. My approach is the expense of anti-jamming and increase the distance Oh, no way can only be the case. Another note is sent to and received from the probe was 8 cm! ! Way to ensure the distance measurement, I do a good job close to the range distance is 6 meters. Send and receive the distance between the probe may also be smaller, but not less than 4cm (online said), I had the time spacing ranging from 2cm to about 3 meters