Static calibration method for mine fiber Bragg grating force measuring anchor rod

A technology of optical fiber Bragg and static calibration, applied in the field of sensing, can solve problems such as heavy workload, achieve accurate measurement results and reduce calibration workload

Active Publication Date: 2018-11-30
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of the present invention is to provide a static calibration method for mining fiber Bragg grating force-measuring bolts that saves time and effort and reduces workload in view of the technical problem that the calibration test causes a large amount of work for personnel.

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  • Static calibration method for mine fiber Bragg grating force measuring anchor rod
  • Static calibration method for mine fiber Bragg grating force measuring anchor rod
  • Static calibration method for mine fiber Bragg grating force measuring anchor rod

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Embodiment Construction

[0022] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0023] Such as figure 1 As shown in the connection diagram of the calibration test equipment, the instruments used in the static calibration test include a universal testing machine 1, an optical fiber demodulator, a static resistance strain gauge and a computer.

[0024] The static calibration method of the mine optical fiber Bragg grating force measuring bolt of the present invention adopts a static calibration device, and the static calibration device includes a universal testing machine 1, an optical fiber demodulator 7, a static resistance strain gauge 11 and a computer 12, and the static calibration method is specific Proceed as follows:

[0025] a. Fix the two ends of the anchor rod 4 on the clamp 2 of the universal testing machine 1 with the chuck 3, fix the fiber Bragg grating sensor 5 and the resistance strain gauge 9 in the middle of the anch...

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Abstract

The invention discloses a static calibration method for a mine fiber Bragg grating force measuring anchor rod and belongs to the field of sensing technology. The method comprises the main steps that all parameters of the fiber Bragg grating force measuring anchor rod in a light-force conversion equation in a strain transmission process are determined; tension input in uniaxial drawing of the anchor rod is measured; data output of a fiber Bragg grating sensor and a resistance strain gauge in uniaxial drawing of the anchor rod is measured; a function relation between the input and the output isdetermined; whether a calibration parameter difference in the function is within an allowed error range is judged, and whether sensor measurement accuracy is real and reliable is evaluated; and errorcompensation and correction are performed. Through the method, it is not needed to perform calibration testing on each sensor before application, and therefore the calibration workload can be greatlyreduced. The method is simple, and the measurement result is accurate.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a static calibration method for a mine fiber Bragg grating force-measuring bolt. Background technique [0002] Fiber Bragg grating sensor has high sensitivity, strong anti-electromagnetic interference ability, corrosion resistance, and is suitable for harsh environments. It has been successfully applied in the field of coal mines and gradually promoted. Its accuracy is of great significance to the quality of mine pressure monitoring data. At present, most fiber Bragg grating sensors used in mines are calibrated in the laboratory in advance, and then the calibration parameters are input into the designed software and converted into the required physical quantities. However, since each sensor needs to be calibrated before application, it is time-consuming and labor-intensive, which greatly increases the workload of personnel. Contents of the invention [0003] Technical problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00G01L1/22
CPCG01L1/22G01L25/00
Inventor 方新秋梁敏富陈宁宁卢海洋宁耀圣
Owner CHINA UNIV OF MINING & TECH
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