Ultrasonic Thickness Measurement Principle
Ultrasonic refers to the sound wave with its acoustic frequencies
above the range audible to the human ear, or above approximately
20,000 hertz. Its waveform is quite similar to audible sound
wave, but the biggest difference is its wavelength shorter than
common wave; therefore, through utilizing it we can get bigger
resolving power and smaller reflection surface to reflect the
measured wave. This kind of characteristics determined that
ultrasonic has much more application scope in the filed of non-destructive
measurement, and it is also the reason for applying this technology
for wall thickness measurement
Please find below
for the schematic drawing of the measuring principle:
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