Device used for dynamic and static calibration of eddy current sensor

Abstract

The invention provides a device used for dynamic and static calibration of an eddy current sensor. The device comprises a pedestal, wherein a vibrating stand module and a clamp for clamping a sensor to be calibrated, a motion executing module of the clamp and a grating ruler assembly are arranged on the pedestal; a sensing disc and a standard acceleration sensor are installed on a working tableboard of the vibrating stand module, and the sensing disc is arranged between the working tableboard and the clamp; the motion executing module consists of a position-adjusting driving assembly which drives the clamp to move along the radial direction of the sensing disc, and a calibration driving assembly which drives the clamp to move along the axial direction of the sensing disc; when static calibration is carried out, the vibrating stand module is in a non-operating state, the calibration driving assembly drives the clamp to do lineal reciprocating motion to be close to or away from the sensing disc, and the grating ruler assembly obtains actual displacement of a calibrated sensor at each test point; and when dynamic calibration is carried out, the calibration driving assembly is in a non-operating state, and the vibrating stand module drives the sensing disc to generate sinusoidal vibration. The device provided by the invention has the advantages of wide calibration frequency range.

Description

technical field [0001] The invention relates to a device for dynamic calibration and static calibration of an eddy current sensor. [0002] technical background [0003] The eddy current sensor can measure the relative displacement between the measured metal conductor and the surface of the sensor probe in a non-contact manner, and is a non-contact linearization measurement tool. [0004] Chinese patent No. 200810036312.2 discloses a fully automatic eddy current sensor dynamic and static calibrator, including a static test unit composed of a static calibration specimen plate and a static calibration probe mounting frame, a dynamic calibration probe mounting frame, a dynamic inclined Disk, a dynamic test unit composed of a dynamic swash plate drive motor. The specific structure is: on the linear module driven by the stepping motor, set a movable guide rail extension rack driven by it, set the static calibration test piece disk and the dynamic calibration probe installation ra...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the dynamic swash plate is driven by a motor, its rotation speed is r / min ( It is generally difficult to reach more than 10000r / min), so the calibration frequency input to the eddy current sensor is only Hz, that is, the dynamic calibration frequency range of the device is relatively narrow

[0006] 2. Static calibration and dynamic calibration are performed by different synchronous motors to perform positioning and calibration movements, the overall mechanical structure is complex, and there is no effective integration of repeated functional modules

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