Structure Optimization of a Piezomagnetic Resistance Sensor Based on Orthogonal Experiment

The piezomagnetic resistance sensor of cross core was taken as the research object to ensure the minimum volume of the sensor under safe working conditions. The structure principle of piezomagnetic sensor was introduced. Based on the ANSYS Workbench software, the whole structure of the sensor was analyzed by finite element method. The stress and deformation distribution of the sensor were obtained. The main structural parameters of the sensor model were optimized by orthogonal experiment method, and the optimal structural parameters were determined. The results show that the resistance sensor of cross core was subjected to both horizontal and vertical forces, which improved the sensitivity of the sensor. By optimization, the comprehensive performance of the sensor was further improved. The maximum equivalent stress was reduced from 456.53 MPa to 298.95 MPa, which increased the safety margin. At the same time, the volume was reduced to 238.8mm, which reduced the manufacturing cost.