Calibration device and method for eddy current sensor used for shaft displacement measurement

Abstract

The application provides a calibration device and method for an eddy current sensor used for shaft displacement measurement. The calibration device includes: a base; a displacement guide rail fixed on the base; a displacement platform slidingly connected to the displacement guide rail; a displacement adjustment mechanism, and the displacement adjustment mechanism is used to make the displacement platform controllable on the displacement guide rail ground movement; the x-axis displacement sensor support, the x-axis displacement sensor support is used to set the x-axis displacement sensor on the sliding direction of the displacement platform; the y-axis displacement sensor support, the y-axis displacement sensor support is used to The y-axis displacement sensor is arranged on the y-axis. The calibration method is to adjust the position of the x-axis displacement sensor and / or y-axis displacement sensor and the test sample to obtain the calibration of the displacement of the rotating shaft measured by a single eddy current sensor, the calibration of the position deviation of the center line of the eddy current sensor and the calibration of the mutual interference of the eddy current sensor calibration method.

Description

technical field [0001] The present application relates to the technical field of sensor calibration, in particular to a calibration device for an eddy current sensor used for measuring the displacement of a rotating shaft and a calibration method for the eddy current sensor used for measuring the displacement of a rotating shaft. Background technique [0002] The eddy current sensor is a device that can be used to measure the displacement of an object. It has been widely used in the field of measurement due to its high measurement accuracy, fast response speed, strong anti-interference and pollution capabilities. [0003] When the eddy current sensor is used to measure the displacement of various rotating shafts, two eddy current sensors are usually required, which are arranged at an angle of 90° in a certain plane perpendicular to the center line of the rotating shaft, so as to measure the displacement of the rotating shaft perpendicular to the center line of the rotating sh...

AI Technical Summary

Problems solved by technology

The existing eddy current sensor calibration platform cannot measure the influence of the sensor centerline position deviation on the signal

[0006] At the same time, as the diameter of the rotating shaft decreases, the eddy current induction areas formed on the surface of the rotating shaft by the two sensors arranged in the same plane begin to overlap each other and the degree of superimposition continues to increase, resulting in signal interference and increasing measurement errors

The existing eddy current sensor calibration platform can only be calibrated for a single sensor, and cannot take into account the influence of mutual interference of two sensors arranged at a certain angle on the same plane

[0007] In the application of existing eddy current sensors to measure the displacement of the rotating shaft, in order to avoid the above-mentioned measurement errors, the diameter of the rotating shaft is usually required to be not less than 3 times or even 10 times the diameter of the eddy current sensor probe, which greatly limits the use of eddy current sensors in small and medium-sized rotating machinery. Application in Rotary Shaft Displacement Measurement

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