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Calibration device for rock radial deformation sensor

A radial deformation and calibration device technology, applied in the direction of measuring devices, mechanical solid deformation measurement, instruments, etc., can solve the problems of undetermined system errors, installation errors, poor repeatability, etc., and achieve wide applicability, convenient operation, and structure simple effect

Inactive Publication Date: 2011-01-05
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chain sensor is calibrated by stretching the open end in a straight line, which cannot simulate the actual working state; the cantilever sensor is difficult to center during calibration, and there are installation errors; the elastic steel ring sensor uses a trapezoidal tower-shaped standard block for calibration, which has poor repeatability
These three types of calibration methods are different, and the systematic error between different calibration methods cannot be determined

Method used

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  • Calibration device for rock radial deformation sensor
  • Calibration device for rock radial deformation sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Calibration of chain radial deformation sensor.

[0016] The main process of calibration is as follows:

[0017] 1. Set the spherical outer contacts of the four lateral displacement rods 5 with a calibration steel ring, wind the chain of the chain type radial deformation sensor around the calibration steel ring, and install the sensor;

[0018] 2. Slowly turn the knob on the top of the screw micrometer 1 at a uniform speed, apply downward displacement step by step, and transmit it to the lateral displacement rod 5 through the displacement converter 3, so that it generates a horizontal displacement, driving the opening end of the steel ring 8 to increase, The opening end of the chain increases accordingly, and the data collector connected with the radial deformation sensor will record the variation of the opening end of the sensor through a computer.

[0019] 3. By analyzing the proportional relationship between the standard value and the measured value, the calibration...

Embodiment 2

[0021] Calibration of elastic steel ring radial deformation sensor.

[0022] The main process of calibration is as follows:

[0023] 1. Set the elastic steel ring of the radial deformation sensor on the spherical outer contacts of the four lateral displacement rods 5;

[0024] 2. Slowly turn the knob on the top of the screw micrometer 1 at a constant speed, apply downward displacement step by step, and transmit it to the lateral displacement rod 5 through the displacement converter 3, so that it generates horizontal displacement, driving the elastic steel ring of the radial deformation sensor The opening end increases, and the data collector connected with the radial deformation sensor will record the variation of the opening end of the sensor through a computer.

[0025] 3. By analyzing the proportional relationship between the standard value and the measured value, the calibration and calibration of the radial deformation sensor is realized.

Embodiment 3

[0027] Calibration of cantilever radial deformation sensor.

[0028] The main process of calibration is as follows:

[0029] 1. Suspend the cantilever type radial deformation sensor on the guide connector 4, so that the screws on the four cantilevers are in good contact with the spherical outer contacts of the four lateral displacement rods 5 respectively;

[0030] 2. Slowly turn the knob on the top of the screw micrometer 1 at a constant speed to apply a downward displacement step by step, which is transmitted to the lateral displacement rod 5 through the displacement converter 3, so that it generates a horizontal displacement and drives the four cantilevers of the radial deformation sensor Expand outward, and the data collector connected with the radial deformation sensor will record the opening amount of the sensor cantilever through the computer.

[0031] 3. By analyzing the proportional relationship between the standard value and the measured value, the calibration and c...

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Abstract

The invention relates to a calibration device for a rock radial deformation sensor, which is suitable for calibrating or correcting radial deformation sensor when in rock indoor test. The calibration device for a rock radial deformation sensor comprises a screw micrometer and a displacement switch device; the displacement switch device comprises a connecting and fixing sleeve, a displacement switcher, a guide connector, a transverse displacement rod, a spring and a screw cap; when in calibration, the radial deformation sensor to be calibrated is sheathed on the guide connector and is contacted with the transverse displacement rod; a knob above the screw micrometer is rotated so as to produce downward displacement; and the displacement is transmitted to the transverse displacement rod through the displacement switcher so as to produce horizontal displacement. The invention solves the problems of inconsistent calibration precision and error analysis among different calibration methods of the sensor. The calibration device has simple structure, easy manufacturing, convenient operation and wide applicability, and can be used for calibrating and correcting the three types of currently normally-used radial deformation sensor.

Description

technical field [0001] The invention relates to a rock deformation sensor calibration technology, and more particularly relates to a rock radial deformation sensor calibration device, which is used for calibrating or calibrating the radial deformation sensor during rock laboratory tests. Background technique [0002] Indoor rock uniaxial and conventional triaxial tests are the most basic and important methods to obtain the physical and mechanical properties of rocks. The accuracy and precision of sensors are directly related to the reliability of test results. In order to ensure the validity of test results, it is necessary to periodically Calibrate and calibrate. [0003] In rock laboratory tests, the radial deformation sensors commonly used generally include three types: cantilever sensors, chain sensors, and elastic steel ring sensors. The chain sensor is calibrated by straight-line stretching at the open end, which cannot simulate the actual working state; the cantileve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/62G01B5/30
Inventor 胡元育高红艾东海
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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