谢志远,张畅,谢思哲.阵列式霍尔传感器去偏心误差优化算法设计[J].电测与仪表,2020,57(22):133-138. xiezhiyuan,zhangchang,xiesizhe.Design of Array Hall Sensor De-wire Array Center Error Optimization Algorithm[J].Electrical Measurement & Instrumentation,2020,57(22):133-138.
阵列式霍尔传感器去偏心误差优化算法设计
Design of Array Hall Sensor De-wire Array Center Error Optimization Algorithm
In practical applications, the error caused by the deviation of the wire from the center of the sensor will greatly affect the measurement accuracy of the array Hall sensor. In order to solve this problem, this paper takes a circular array Hall current sensor composed of eight Hall elements as an example. Based on the analysis of the influence of the positional deviation of the wire on the measurement accuracy of the Hall sensor, it is compared with the predecessors. The wire positioning algorithm proposes and elaborates the optimization algorithm design for the error caused by the deviation of the wire from the center of the sensor. The output of each Hall element is detected by detecting the change of the output voltage of each Hall element caused by the displacement of the wire position. The voltage gain is automatically feedback adjusted to minimize the complexity of the algorithm and to eliminate the error caused by the wire leaving the center of the sensor. The simulation results show that the feedback adjustment of the output voltage-weighted gain coefficient of the Hall element can well eliminate the influence of the error caused by the deviation of the wire from the center of the sensor, and the measurement accuracy of the sensor is greatly improved. The algorithm is applicable to all circular array Hall current sensors and can be extended to all current measurement sensors based on circular array structures.
