基于磁感原理的非接触多通道电流测试仪的设计与验证

Design and verification of non-contact multi-channel current tester based on magnetic induction principle

功率环和信号环的电流检测是太阳帆板驱动机构的重要测试项目。现有检测方法对SADA电流回路进行接触式检测,若检测设备故障或者人员操作不当会对SADA造成损伤。为了避免损伤,基于霍尔效应设计了一种非接触式多通道电流测试仪,可以在不接触被测目标的情况下,对SADA功率环和信号环中电流进行有效测量,检测精度优于0.2%。与原有检测方法的对比试验表明,两种方法对SADA信号环和功率环的相对误差均在0.1%之内。可见,该仪器测量精度足以有效满足SADA信号环和功率环的测试需求,其优点在于降低检测过程中产品损坏的风险。

The current detection of the power loop and the signal loop is an important test item for the solar array driving mechanism(SADA).Existing detection methods perform contact detection on the SADA current loop.If the detection equipment fails or the personnel operate improperly,it will cause damage to the SADA.In order to avoid damage,a non-contact multi-channel current tester is designed based on the Hall effect,which can effectively measure the current in the SADA power loop and signal loop without touching the target under test,and the detection accuracy is better than 0.2%.The comparison test with the original detection method shows that the relative errors of the two methods for the SADA signal loop and power loop are both within 0.1%.It can be seen that the measurement accuracy of this instrument is sufficient to effectively meet the test requirements of the SADA signal loop and power loop,and its advantage is to reduce the risk of product damage during the detection process.