Polar plate coil assembly for electromagnetic field calibration and electromagnetic field on-site calibration device

Abstract

The invention relates to a pole plate coil assembly used for electromagnetic field calibration and an electromagnetic field on-site calibration device. The pole plate coil assembly is composed of twoelectric field pole plates and two magnetic field coils, and the electromagnetic field on-site calibration device comprises a monitoring host and a support device; and a low-frequency power signal source, a high-precision voltmeter, a signal switching device and a control unit are arranged in the monitoring host. During calibration, the signal switching device switches output signals of the low-frequency power signal source between the electric field polar plate and the magnetic field coil, the control unit reads probe data and compares the probe data with theoretical electric field intensitygenerated by the electric field polar plate or magnetic field intensity generated by the magnetic field coil, and probe calibration is achieved. According to the invention, the calibration period of the probe can be prolonged, the metering cost and the operation and maintenance burden are reduced, and the calibration accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic field measurement, and relates to on-site calibration of a low-frequency electromagnetic field monitoring probe, in particular to a pole plate coil assembly and an electromagnetic field on-site calibration device for electromagnetic field calibration. Background technique [0002] The calibration of the probe is one of the necessary means to ensure the accuracy of the test. Through calibration, it can be judged whether the probe is working normally, and at the same time, the latest probe calibration factor can be obtained (the calibration factor can be used as a correction for the actual test result). [0003] Electromagnetic field probes include portable electromagnetic field probes and fixed electromagnetic field probes. The former is more convenient for measurement and calibration, while the latter needs to be installed at monitoring points for long-term continuous monitoring (mainly for...

AI Technical Summary

Problems solved by technology

With the increase of the probe usage time, when the data changes, it is often impossible to accurately evaluate the change. Usually, the latest probe correction coefficient can only be obtained through one-year or two-year calibration. However, in the measurement cycle It is impossible to determine the change rule of the data in the

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