FIELD: measuring equipment.
SUBSTANCE: by means of a coherent radar unit or a coherent sonar, operating in the ultrasonic range, a vibrating surface is irradiated. The reflected signal is received, and the vibration frequency is measured. The amplitudes of the first four harmonics are measured, and the values obtained are evaluated. Based on the results of this evaluation, a pair of harmonics - either odd or even - is selected, and the ratio of the amplitudes of these harmonics is determined. From this amplitude ratio, the vibration amplitude value is calculated.
EFFECT: increasing the accuracy of determining the vibration amplitude and expanding the method application scope due to eliminating the effect on the results of the measurements of the phase shift factor of the signal.
1 dwg
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