Design and implementation of in-situ improved calibration system of low-frequency magneto-electric vibration transducers
Aiming at the problem of large calibration errors in high frequency range of the in-situ calibration of the pickup,a system model with the improved calibration circuit is constructed.Through experiments,the relative error of the normalized sensitivity of the in-situ calibration and laser interference method is obtained,and it is found that the relative error after the improved circuit is smaller than the relative error before the improved circuit.In addition,during the experiments,the horizontal sensor has high requirements of the installation angle,and calibration result of laser interference method and the in-situ calibration method are obtained by changing the angle between the sensor and the horizontal surface,and it is found that when the sensor had a certain angle with the horizontal surface,the calibration error of sensitivity in low frequency and high frequency become larger by using the improved calibration method.
sensitivitymagneto-electric sensorin-situ calibrationlow frequency vibration
万方数据
维普
