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A tensile force measuring device based on an optical fiber interferometer

A technology of optical fiber interferometer and tensile force measurement, which is applied in the direction of measuring devices, measuring force, instruments, etc., can solve problems such as creep and zero drift, complex structure, mechanical hysteresis, etc., and achieve small angle, small volume, and high precision Effect

Pending Publication Date: 2018-02-02
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, tension sensors and high-precision tension sensors are the most commonly used, and there are shortcomings such as mechanical hysteresis, creep and zero drift, low precision and complex structure.

Method used

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  • A tensile force measuring device based on an optical fiber interferometer
  • A tensile force measuring device based on an optical fiber interferometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 and figure 2 As shown, a tension measurement device based on fiber optic interferometer, which includes a tension deformation component, an optical fiber interference system, an optical fiber adjustment system, and a control unit. The optical fiber adjustment system corrects the optical fiber interference system before tension measurement, and the tension deformation The force on the component causes the optical fiber interference system to generate interference fringes, and the optical fiber interference system transmits the data of the interference fringes to the control unit for analysis and measurement.

[0028] Wherein, the tensile deformation assembly includes a support 1, a spring piece 2, and a hook frame 3, one end of the spring piece 2 is connected to one side of the support 1, the other end of the spring piece 2 is connected to an end of the pull hook frame 3, and the pull hook frame 3 The other end is connected with the other side of the brac...

Embodiment 2

[0034] The working process of measuring tension;

[0035] Press the switch key to turn on the measuring device when starting the measurement;

[0036] Perform zero adjustment at zero tension;

[0037] When the tension is zero, adjust the two adjustment heads 17 in the direction of the X reference axis, observe the interference fringes on the control screen 20, and make the thin lines fixed on the control screen 20 parallel to the interference fringes;

[0038] When the tension is zero, adjust one adjustment head 17 in the direction of the Y reference axis, and observe the interference fringes on the control screen 20, so that the interference fringes on the control screen 20 disappear and become fully bright or completely dark;

[0039] At this time, the end face of the data optical fiber 8 is parallel to the face of the reflector 7, and the included angle is very small.

[0040] Calibration of measuring devices:

[0041] Hang the calibration code 1 for the first time...

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Abstract

The invention relates to the technical field of force testing and in particular provides a tensile force measuring device based on an optical fiber interferometer. The tensile force measuring device comprises a tensile force deformation component, an optical fiber interference system, an optical fiber adjusting system and a control unit. The optical fiber adjusting system performs correction on the optical fiber interference system before tensile force measurement; the tensile force deformation component bears force to make the optical fiber interference system generate interference fringes; the optical fiber interference system transmits the interference fringe data to the control unit for analysis and measurement. The device has the advantages of high precision (the elastic change displacement of optical interference measurement reaching the nm level), simple and stable structure, high performance and small size.

Description

technical field [0001] The invention relates to the technical field of force testing, in particular to a tension measuring device based on an optical fiber interferometer. Background technique [0002] At present, there are many kinds of tension measurement methods, different working principles, application characteristics and application ranges are different. Its classification is also very different. Common types can be generally divided into: resistance strain gauge type, electromagnetic force type, photoelectric type, capacitive type, hydraulic type, etc. [0003] The most widely used and most mature form of resistance strain gauge tension sensor and its accuracy is relatively high. It uses the elastic body to produce elastic deformation under the action of external tension, and converts the change of resistance into electrical signals through the phase measurement circuit. But its disadvantages are mechanical hysteresis, creep and zero drift. When measuring tiny ten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24
CPCG01L1/242
Inventor 赖学辉师文庆王文华安芬菊许剑杨文虎黄江谢玉萍张海康邱彩虹王伟宏
Owner GUANGDONG OCEAN UNIVERSITY