双环椭圆传感器阵列串扰误差优化研究

Crosstalk Error Optimization of Double-Ring Elliptic Sensor Array

阵列式霍尔电流传感器采用了无磁芯设计,解决了传统电流传感器质量大、体积大的缺点,可以有效检测电流,以达到检测、控制和保护电路的目的。然而在汽车电子、工业仪器等应用场景中,线路排布较为密集,电流传感器在采集电流时易产生串扰误差。首先利用投影法将圆形阵列转化为椭圆形阵列;然后采用双环设计,每对传感器排布在同一径上,方向相反;接着提出了一种运用于椭圆阵列传感器的串扰优化算法,以减小导体偏移阵列中心和干扰导体造成的影响;最后搭建了实验平台,对不同的传感器阵列进行了测量,对串扰优化算法进行了验证。实验结果表明,串扰优化算法可以有效抑制干扰导体产生的串扰误差,将测量误差控制在1%以内,极大地提升了电流检测精度。

The array Hall current sensor adopts the design without magnetic core, which solves the disadvantages of the traditional current sensor with large weight and volume, and can effectively detect the current to achieve the purpose of detecting, controlling and protecting the circuit.However, in automotive electronics, industrial instruments and other application scenarios, the line layout is relatively dense, and the current sensor is easy to produce crosstalk error when collecting current.Firstly, the circular array is transformed into elliptical array by projection method.The double-ring design is adopted, and each pair of sensors is arranged on the same path, in opposite directions.Then, a crosstalk optimization algorithm for elliptic array sensor is proposed to reduce the influence caused by the conductor shifting the array center and interference conductor.Finally, an experimental platform is built to measure different sensor arrays and verify the crosstalk optimization algorithm.The experimental results show that the crosstalk optimization algorithm can effectively suppress the crosstalk error caused by the interference conductor, and the measurement error is controlled within 1%,which greatly improves the current detection accuracy.