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Three-dimensional stress sensor calibration device and calibration method thereof

A technology of a three-dimensional stress and calibration device, which is applied in the field of sensors, can solve the problems such as the lack of a hollow-body fiber Bragg grating three-dimensional stress sensor, and achieve the effects of improving the calibration efficiency, the method is simple and fast, and the structure is simple.

Active Publication Date: 2020-06-16
兖矿能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there is no calibration technology for the three-dimensional stress sensor of the hollow inclusion fiber Bragg grating.

Method used

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  • Three-dimensional stress sensor calibration device and calibration method thereof
  • Three-dimensional stress sensor calibration device and calibration method thereof
  • Three-dimensional stress sensor calibration device and calibration method thereof

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Experimental program
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Embodiment 1

[0035] see figure 1 , is the overall schematic diagram of the three-dimensional stress sensor calibration device in this embodiment, the calibration device includes a three-dimensional stress sensor 1 , a cubic homogeneous sample 2 and a biaxial loader 3 . The three-dimensional stress sensor 1 is set on the cubic homogeneous sample 2, and the cubic homogeneous sample 2 is set on the biaxial loading machine 3, and the biaxial loading machine 2 performs biaxial loading on the cubic homogeneous sample 2.

[0036] see Figure 1 ~ Figure 3 , the modulus of elasticity of the cubic homogeneous sample 2 is not less than 3GPa, and the side length is not less than 150mm. The cubic homogeneous sample of this embodiment is preferably made of organic glass, whose modulus of elasticity is 3.5 GPa, and the side length is 300 mm. A borehole is arranged at the center of one face of the cubic homogeneous sample 2, the borehole is perpendicular to the face and runs through the cube homogeneous...

Embodiment 2

[0071] The difference between this embodiment and embodiment 1 is that the cubic homogeneous sample 2 is made of epoxy resin, and its modulus of elasticity is 5GPa, and the others are the same.

[0072] The three-dimensional stress sensor calibration device of the present invention adopts the coordinative design of the hollow package three-dimensional stress sensor of the optical fiber Bragg grating and the biaxial loading machine, and can accurately transmit the sensor data while ensuring the accurate and stable change of the loading value, and at the same time the data acquisition instrument It transmits, stores and exports data with the data summarization unit, and the calibration unit uses the exported data for calibration analysis to realize effective calibration of the three-dimensional stress sensor. The structure is simple, the measurement results are accurate, and the efficiency of sensor calibration is improved.

[0073] In addition, the three-dimensional stress senso...

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Abstract

The invention belongs to the technical field of sensors, and particularly relates to a three-dimensional stress sensor calibration device. The device comprises a three-dimensional stress sensor, a cubic homogeneous sample and a biaxial loading machine. The three-dimensional stress sensor is in communication connection with a data acquisition instrument, the data acquisition instrument is in communication connection with a data summarization unit, and the data summarization unit is in communication connection with a calibration unit. The invention further relates to a calibration method. The three-dimensional stress sensor is installed in a cubic homogeneous sample drill hole, the biaxial loading machine establishes a space rectangular coordinate system to be loaded from zero to a preset loading value, the data summarizing unit stores and exports data, and the calibration unit performs calibration analysis. In the invention, a cooperative design of the three-dimensional stress sensor and the biaxial loading machine is adopted, the data summarization unit is utilized to derive a wavelength value change trend, the calibration unit calculates a calibration coefficient according to thederived data, accuracy is high, the structure is simple, the method is simple and convenient, time and a labor are saved, and an application field is wider.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a three-dimensional stress sensor calibration device and a calibration method thereof. Background technique [0002] The three-dimensional stress of surrounding rock is the direct factor that causes engineering instability and destruction, so the monitoring of three-dimensional stress of surrounding rock is very important, especially in underground engineering fields such as geotechnical and mining. The three-dimensional stress of coal and rock mass is mainly composed of two parts, one is the original rock stress, which existed in the coal and rock mass before human engineering activities occurred, and its size and direction are fixed for a specific position; The other part is disturbance stress, which is the stress caused by human engineering activities such as coal seam mining, and its magnitude and direction change with mining activities. [0003] Traditional in-s...

Claims

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Application Information

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IPC IPC(8): G01L25/00
CPCG01L25/00
Inventor 邢天海王富奇陈勇郑有雷代长春程文武贾晓东杨洋
Owner 兖矿能源集团股份有限公司