A Calibration Method for Measuring Voltage by Hall Voltage Sensor

Abstract

The invention discloses a correction method for Hall voltage sensor measuring voltage. The correction method includes the steps of S1), measuring amplitude-frequency characteristic data of a Hall voltage sensor; S2), calculating frequency responses corresponding to different input signal frequency values of the Hall voltage sensor; S3), drawing fitting curves of the frequency responses; S4), subjecting the fitting curves of the frequency responses to piecewise linear evaluation to acquire representative values of the frequency responses in piecewise corresponding to input signal frequency of the Hall voltage sensor; S5), calculating correction coefficients in piecewise corresponding to the input signal frequency of the Hall voltage sensor; S6), tabulating the correction coefficients corresponding to piecewise intervals of the input signal frequency. By the correction method, the frequency response range of the Hall voltage sensor is expanded, alternating-current voltage signals within 2kHz can be accurately measured, and the correction method can be applied to measuring of input voltage of a high-voltage industrial power amplifier system.

Description

technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a correction method for voltage measurement by a Hall voltage sensor, in particular to a method capable of accurately measuring AC voltage signals within 2kHz by using a Hall voltage sensor. Background technique [0002] In the field of electronic circuits, in order to measure high-voltage output signals (voltages as high as several thousand volts), the resistance voltage division detection method is usually used to divide the high voltage by using resistors in series, and then calculate the voltage before the voltage division by measuring the voltage of the voltage division resistor. voltage. [0003] In the prior art, the scheme of using Hall voltage sensor to measure voltage is as follows: figure 1 Shown: First, the output voltage of the upper stage passes through the voltage divider circuit, and then is sent to the Hall voltage sensor after being isol...

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Problems solved by technology

[0008] In order to solve the above-mentioned problems existing in the prior art, the object of the present invention is to provide a correction method for the voltage measured by the Hall voltage sensor, which introduces the correction coefficient by performing piecewise linear evaluation on the response frequency of the Hall voltage sensor The calculation can improve the output voltage result of the Hall voltage sensor due to the frequency response problem, so that even if the input signal frequency is relatively wide, the measurement results of the Hall voltage sensor have certain accuracy

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