Hall sensor chip temperature compensation method for automobile

Abstract

The invention belongs to the technical field of sensing chip temperature compensation, and particularly relates to a Hall sensor chip temperature compensation method for an automobile, wherein the method comprises the following steps: S1, establishing a function relationship among a detected current, an output voltage of a Hall current sensor and a working temperature of the Hall current sensor by adopting a two-dimensional regression analysis method, carrying out data fusion processing, and establishing a training database; S2, receiving a measured signal; S3, analyzing the detected signal and a corresponding set threshold value; S4, performing temperature effect compensation according to the standard value calculated by the training database; and S5, outputting the measured current after temperature compensation. Real-time temperature compensation of the Hall current sensor can be realized, recalculation and analysis of acquired data caused by temperature change in a working process are not needed, the method has the characteristics of high processing speed, stability and reliability, meanwhile, the method has good self-adaptivity, and actual measurement requirements are met.

Description

technical field [0001] The invention relates to the technical field of sensor chip temperature compensation, in particular to a temperature compensation method for a Hall sensor chip used in automobiles. Background technique [0002] The Hall current sensor is greatly affected by temperature, so it is necessary to perform temperature compensation on the sensor. During the measurement experiment, different test currents are usually applied to the Hall current sensor in a constant temperature field, and its operating temperature is monitored with a temperature sensor. According to the monitoring results, the measured current is established by two-dimensional regression analysis. The Hall current sensor The functional relationship between the output voltage and its working temperature is processed by data fusion to weaken the interference of the temperature on the current sensor. The fusion results show that the measurement accuracy of the current sensor after compensation is ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for temperature compensation of the Hall sensor chip used in automobiles, which solves the problem that the existing two-dimensional regression analysis method software temperature compensation method is used for temperature compensation of the Hall current sensor. It is necessary to continuously use the two-dimensional regression equation to calculate the corresponding input measured target parameters. The single-chip computer has a large amount of calculation and a heavy burden. The response speed is affected by a large number of complex calculations, and the temperature compensation processing efficiency is low.

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