Remote calibration device of borehole deformation instrument for borehole ground deformation measurement

Abstract

The invention discloses a remote calibration device of a borehole deformation instrument for borehole ground deformation measurement. The device comprises a micro-displacement device, a calibration device body and a calibration and control device, wherein the micro-displacement device is provided with a movable displacement driving portion which is connected with the measuring polar plate in the middle of a tripolar differential capacitor type micro-displacement sensor of a borehole strainmeter and can measure the measuring polar plate; the calibration device body is arranged on one side of the measuring polar plate of the tripolar differential capacitor type micro-displacement sensor and can detect the displacement variation of the measuring polar plate; the calibration and control device is respectively in communication with the micro-displacement device and the calibration device body and can send the received displacement variation of the measuring polar plate to a remote data processing terminal, wherein the displacement variation is detected by the calibration device body; a displacement control signal sent by the data processing terminal is transmitted to the micro-displacement device, so that the displacement driving portion of the micro-displacement device is controlled to move the measuring polar plate of the tripolar differential capacitor type micro-displacement sensor according to the displacement control signal. The remote calibration device is simple in structure and facilitates remote calibration of the borehole deformation instrument.

Description

technical field [0001] The invention relates to the field of calibration and calibration of borehole strain gauges, in particular to a remote calibration device for borehole strain gauges which can be used for convenient linear calibration and calibration in borehole deformation measurement. Background technique [0002] In the measurement of borehole deformation, the measuring probe is usually coupled with the rock in the way of cement coupling. Once the probe is installed in the well, it cannot be taken out. During more than ten years of work, the sensors and electronic measurement systems of downhole instruments will undergo slight changes due to factors such as the working environment and working years. The change of sensor performance directly affects the quality of observation data. Therefore, the industry standard for seismic instruments requires that downhole instruments connected to the network must have the ability of downhole physical static calibration, and be a...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a remote calibration device for a borehole deformation gauge used for borehole deformation measurement, which can be conveniently installed on the downhole probe in cooperation with the sensor of the borehole strain gauge, and can be easily connected with the remote data The processing terminal cooperates to realize remote linear calibration and calibration, so as to solve the problem that the existing borehole strain gauges used for borehole deformation measurement can only be calibrated statically downhole, and it is difficult to realize convenient remote linear calibration and calibration

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