A method for calibrating a magnetic flux sensor acquisition instrument
A magnetic flux sensor and calibration method technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of small changes in cable magnetic flux and large differences in acquisition instruments, and achieve the effects of eliminating differences, consistent indicators, and reducing deviations
Active Publication Date: 2019-04-05
JIANGXI FASHION TECH
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Problems solved by technology
[0002] For the known magnetic flux sensor collector, due to the small change in the magnetic flux of the cable, the accuracy of the magnetic flux is required to be high. The collector is composed of analog components, and the difference between different collectors is large. As a result, for the same cable, each collector needs to be re-calibrated before it can be used.
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[0019] Attached below figure 1 The present invention is described in detail:
[0020] A method for calibrating a magnetic flux sensor acquisition instrument, the method is as follows:
[0021] The method includes using a magnetic flux collector 8 and a magnetic flux calibrator (1);
[0022] The internal first DSP chip 9 of the magnetic flux acquisition instrument 6 sends an adjustable duty cycle PWM signal, which is converted into a sinusoidal signal after passing through the low pass of the excitation module 7, and then amplified and output by the excitation module 7;
[0023] There is a high-speed ADC module 3 inside the magnetic flux acquisition and calibration instrument 1. The ADC module 3 is used to collect the excitation signal sent by the magnetic flux acquisition instrument and transmit it to the second DSP chip 2. The second DSP chip 2 passes the received excitation signal into the digital circuit. Convert to obtain the root mean square value of the excitation sign...
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The invention relates to a calibration method of a magnetic flux sensor acquisition instrument, belongs to the civil engineering field and is applied to the structural safety and health monitoring industry. The excitation signals of a magnetic flux acquisition instrument are detected through a magnetic flux calibration instrument, and the magnetic flux acquisition instrument automatically corrects the excitation signals; and the magnetic flux calibration instrument sends out standard induction signals for the correction of the induction receiving circuit of the magnetic flux acquisition instrument. According to the calibration method of the invention, the excitation signals of a cable and the receiving circuit are automatically compensated, and therefore, differences between magnetic flux acquisition instruments can be eliminated, the indexes of the produced magnetic flux acquisition instruments can be consistent, deviation between the acquisition instruments can be decreased, and the produced magnetic flux acquisition instruments can be consistent.
Description
technical field [0001] The invention relates to a calibration method for a magnetic flux sensor acquisition instrument, which belongs to the field of civil engineering and is applied to the structural safety and health monitoring industry. Background technique [0002] For the known magnetic flux sensor collector, due to the small change in the magnetic flux of the cable, the accuracy of the magnetic flux is required to be high. The collector is composed of analog components, and the difference between different collectors is large. As a result, for the same cable, each collector needs to be re-calibrated before it can be used. . Contents of the invention [0003] In order to overcome the above-mentioned defects, the present invention aims to provide a method for calibrating magnetic flux sensor collectors. By automatically correcting the collectors, the indicators of each magnetic flux collector are consistent, reducing the deviation between the collectors, and making the...
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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 李松王辅宋刘付鹏孙立锴董元清
Owner JIANGXI FASHION TECH