A New Calibration Method for Piezoelectric Testing System Based on Orthogonal Calibration Method

The accuracy of piezoelectric test system has a direct influence on the accuracy of the vector force detection. Piezoelectric sensor parameters are obtained by calibration system calibrated through orthogonal calibration method. Accuracy of the application of field test lacks the corresponding theoretical basis, resulting in test system test accuracy is questioned. In this paper, piezoelectric force test system is used as the research object. In order to verify accuracy of piezoelectric test system through calibration of orthogonal calibration method, a variable angle deflection loading device was designed. An incremental calibration method for thrust test is put forward by applying vector force at different angles. Based on vector force coordinate transformation matrix, a deflection load test and analysis model are established. The vector force coordinates transformation matrix is used to calculate the experimental data obtained from the deviation angle test system, and the deviation of the vector force value is obtained. Finally, the accuracy, effectiveness and rationality of piezoelectric test system through the orthogonal calibration method are verified.