霍尔传感器温度漂移补偿电路设计

发布时间：2018-05-20 22:09

本文选题：霍尔传感器 + 温度漂移　；参考：《强激光与粒子束》2017年04期

【摘要】：霍尔传感器作为一种半导体器件,其灵敏度随着温度变化而产生漂移的特性,限制了其在高精度磁场测量场合的应用。传统的温度补偿方法虽然对温度变化的一次项进行了完全补偿,但是却引入了温度变化二次项的误差。因此,对于温度变化显著的高精度测量场合,传统温度补偿法将不再适用。设计了一种闭环反馈电路,通过温度传感器采集温度信号,与信号处理电路的最终输出信号进行运算后送回信号处理电路的输入端进行补偿,而并不是简单地将温度信号与霍尔信号的输入信号进行相加后送入信号处理电路。仿真分析结果表明,通过调节补偿电路的反馈比例系数与霍尔芯片温度漂移系数,可以完全补偿霍尔芯片的灵敏度漂移。因此,这种闭环补偿方法可以不引入与温度变化二次项有关的误差,消除因温度变化产生的漂移,不仅适用于霍尔传感器,也适用于其他会随着温度漂移的传感器。
[Abstract]:Hall sensor is a kind of semiconductor device, its sensitivity drift with temperature change, which limits its application in high precision magnetic field measurement. Although the traditional temperature compensation method completely compensates the first term of the temperature change, the error of the quadratic term of the temperature change is introduced. Therefore, the traditional temperature compensation method is no longer suitable for high precision measurement where the temperature change is significant. A closed-loop feedback circuit is designed. Temperature signals are collected by temperature sensor, and the final output signal of the signal processing circuit is calculated and sent back to the input end of the signal processing circuit for compensation. The temperature signal is not simply added to the input signal of Hall signal and then sent to the signal processing circuit. The simulation results show that the sensitivity drift of Hall chip can be completely compensated by adjusting the feedback ratio coefficient of compensation circuit and the temperature drift coefficient of Hall chip. Therefore, the closed-loop compensation method can eliminate the drift caused by the temperature change without introducing the error related to the quadratic term of temperature change, which is suitable not only for Hall sensor, but also for other sensors that drift with temperature.
【作者单位】：中国科学院等离子体物理研究所;中国科学技术大学研究生院科学岛分院;
【基金】：国际热核聚变实验堆(ITER)计划专项(2011GB114000)
【分类号】：TP212

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