Adjustable automatic wave amplitude gain compensation method and circuit for ultrasonic thickness gauge
An automatic gain compensation, ultrasonic thickness gauge technology, applied in the direction of using ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problems of poor automation and slow response speed, and achieve high automation, fast response speed and cost. low cost effect
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[0047] This embodiment of the present invention provides an adjustable amplitude automatic gain compensation method for an ultrasonic thickness gauge, which is combined below Figure 8a , Figure 8b with Figure 9 The adjustable amplitude automatic gain compensation method of the ultrasonic thickness gauge of the present invention will be described in detail.
[0048] First, set a fixed gain voltage; then, using the influence of the ultrasonic transmission distance, when the ultrasonic transmission distance is longer, the amplitude of the reflected ultrasonic wave will be smaller, and the triangular voltage will be generated by the integrating circuit within the ultrasonic transmission time, and the triangular voltage will be generated by the adder. The voltage and the gain voltage are superimposed together to realize the automatic compensation of the amplitude of the ultrasonic thickness measurement. For the basic and specific circuit design, please refer to Figure 8a , ca...
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