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利用核磁共振仪对恒温霍尔元件在磁场为0.7～2.1T范围内进行了标定.为了使拟合公式也能应用到0.7T以下的范围,提出了一种解决问题的方法.其主要点是:(1)同时在正负磁场(±0.7～±2.1T)下进行标定.(2)磁场作为霍尔电压的函数B(H)可以看作是一个对称函数B~S和一个反对称函数B~A的叠加,(3)用直尺和坐标纸对B~S和B~A公式化.最后得到一个对正负磁场区都适合的拟合公式,标定区的计算值与实验值的最大偏差小于0.025％,在应用到磁场为0.7T以下时也具有较小的误差.高于0.15T误差小于0.1％.
The calibration of constant temperature Hall element in the magnetic field of 0.7 ~ 2.1T was carried out by using a nuclear magnetic resonance (NMR) instrument. In order to make the fitting formula applicable to the range below 0.7T, a method to solve the problem is proposed : (1) Calibrate in both positive and negative magnetic fields (± 0.7 ~ ± 2.1T). (2) The magnetic field as a function of Hall voltage B (H) can be regarded as a symmetric function B ~ S and an antisymmetric function B ~ A, (3) B ~ S and B ~ A are formulated by using ruler and coordinate paper.Finally, a fitting formula suitable for both positive and negative magnetic fields is obtained, and the calculated and experimental values of the calibration area are the maximum The deviation is less than 0.025%, with a smaller error when applied to a magnetic field below 0.7 T. The error above 0.15T is less than 0.1%.