Hall current sensor calibration device and method

Abstract

The invention discloses a Hall current sensor zero calibration device. The device is applied to calibration of the Hall current sensor. The device comprises a calibration winding, a zero detection coil, a calibration current source and an excitation current detector. The primary side of the zero detection coil is wound with a compensation winding, and the secondary side of the zero detection coilis wound with an excitation current detection winding. The calibration winding is wound on the primary side of the Hall current sensor. The Hall current sensor is in a running state. The calibration current source, the calibration winding and the compensation winding are connected in sequence to form a loop. Two ends of the excitation current detection winding are respectively connected with the excitation current detector, so that the excitation current detector measures the current of the excitation current detection winding. The excitation current detector adjusts the output current of thecalibration current source according to the measured current of the excitation current detection winding. According to the invention, online zero calibration can be carried out on the Hall current sensor, the calibrated Hall current sensor does not need to be dismounted, and the calibration efficiency is improved.

Description

technical field [0001] The present application relates to sensor calibration, in particular to a Hall current sensor calibration device and method. Background technique [0002] The Hall current sensor is a current sensor commonly used in satellite and spacecraft power supply and distribution systems. It has the advantages of lightness, compactness, and high accuracy. Drift increases measurement error. After research, the main measurement error of the Hall current sensor comes from zero point error and linearity error, and the error component introduced by the linearity of the Hall current sensor has less influence than the zero point error, while the zero point error mainly comes from the magnetic flux leakage in the core gap , zero magnetic error introduced by hysteresis and geomagnetic effect and zero potential drift error introduced by integrated operational amplifier and Hall element, when the Hall current sensor is used for a long time in satellites or other complex e...

AI Technical Summary

Problems solved by technology

[0002] The Hall current sensor is a current sensor commonly used in satellite and spacecraft power supply and distribution systems. It has the advantages of lightness, compactness, and high accuracy. Drift increases measurement error

After research, the main measurement error of the Hall current sensor comes from zero point error and linearity error, and the error component introduced by the linearity of the Hall current sensor has less influence than the zero point error, while the zero point error mainly comes from the magnetic flux leakage in the core gap , zero magnetic errors introduced by hysteresis and geomagnetic effects and zero potential drift errors introduced by integrated operational amplifiers and Hall elements. When the Hall current sensor is used in satellites or other complex environments on the ground for a long time, the drift of the zero point will affect the measurement results. Therefore, it is necessary to solve the problem of zero point error calibration of the mounted current sensor

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