Phase calibration and correction method for mechanical impedance measurement
A mechanical impedance and phase calibration technology, which is applied in the direction of measuring device, measuring mechanical impedance, measuring ultrasonic/sonic wave/infrasonic wave, etc., can solve the problems of mechanical impedance characteristic deviation, affecting loss factor, restricting the improvement of elastic element design technology, etc. , to achieve the effect of reducing the phase deviation and reducing the error
Inactive Publication Date: 2013-10-09
中国船舶重工集团公司第七〇二研究所
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Abstract
The invention relates to a phase calibration and correction method for mechanical impedance measurement. Signals of measured force and accelerated speed during calibration of a force and accelerated speed measurement system are obtained by means of the quality loading method, an amplitude and a phase between a force measuring channel and an accelerated speed measuring channel are corrected, deviations of the amplitude and the phase between the force channel measuring channel and the accelerated speed channel are obtained, and a correction factor is combined to correct mechanical impedance. According to the method, under the condition that only calibration of the amplitude of a sensor is considered, and the phase is not deeply researched in the past, calibration is conducted on frequency response of the amplitude and the phase of the whole measurement system, calibration results are used for mechanical impedance measurement and data processing, the deviations of the phase of the mechanical impedance are greatly reduced, and errors, caused by the measurement system, of measurement of the mechanical impedance can be effectively reduced.
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PhysicsCalibration result +5
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