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Optical fiber Bragg grating type stick force sensor

A technology of optical fiber Bragg and force sensor, which is applied in the measurement of force by measuring the change of optical properties of the material when it is stressed, and can solve the problems of fiber Bragg grating sensor cross sensitivity, etc., and achieve light weight, high precision and small size Effect

Inactive Publication Date: 2013-08-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a fiber Bragg grating type rod force sensor, which can eliminate the influence of temperature while measuring the rod force, and effectively improve the sensitivity of the fiber optic Bragg grating type rod force sensor. The process is simple, the signal processing is simple, and the problem of cross-sensitivity of fiber Bragg grating sensors is solved

Method used

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  • Optical fiber Bragg grating type stick force sensor
  • Optical fiber Bragg grating type stick force sensor
  • Optical fiber Bragg grating type stick force sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: attached figure 1 It is a fiber Bragg grating type rod force sensor according to Embodiment 1 of the present invention, which includes a first associated parallel beam 1, a second associated parallel beam 2, a first fiber Bragg grating strain sensor 3, and a second fiber Bragg grating strain sensor 4 , the third Fiber Bragg Grating strain sensor 5, the fourth Fiber Bragg Grating strain sensor 6: the first Fiber Bragg Grating strain sensor 3 and the second Fiber Bragg Grating strain sensor 4 are symmetrically pasted on 1-1 of the first associated parallel beam 1 On the central axis parallel to the rectangular hollow rectangular frame on the surface; the third fiber Bragg grating strain sensor 5 and the fourth fiber Bragg grating strain sensor 6 are symmetrically pasted on the 2-1 surface of the second associated parallel beam 2 with the rectangular hollow rectangular frame On the central axis parallel to the frame; the first FBG strain sensor 3 and the thir...

Embodiment 2

[0038] Embodiment 2: see attached figure 1 , the difference from Example 1 is that the first Fiber Bragg Grating strain sensor 3, the second Fiber Bragg Grating strain sensor 4, the third Fiber Bragg Grating strain sensor 5 and the fourth Fiber Bragg Grating strain sensor 6 are all It is a patch type fiber Bragg grating strain sensor.

Embodiment 3

[0039] Embodiment 3: see attached image 3 , the difference from Example 1 is that on the basis of the sensor structure of Example 1, the fifth Fiber Bragg Grating strain sensor 7, the sixth Fiber Bragg Grating strain sensor 8, the seventh Fiber Bragg Grating strain sensor 9 and The purpose of the eighth fiber Bragg grating strain sensor 10 is to improve the sensitivity of the sensor. Wherein the first Fiber Bragg Grating strain sensor 3, the second Fiber Bragg Grating strain sensor 4, the third Fiber Bragg Grating strain sensor 5, the fourth Fiber Bragg Grating strain sensor 6, the fifth Fiber Bragg Grating strain sensor 7, the sixth Fiber Bragg The grating strain sensor 8, the seventh fiber Bragg grating strain sensor 9 and the eighth fiber Bragg grating strain sensor 10 are all bare fiber Bragg gratings, and the first fiber Bragg grating strain sensor 3 and the second fiber Bragg grating strain sensor 4 are identical The bare fiber Bragg grating; the third fiber Bragg grat...

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Abstract

The invention relates to an optical fiber Bragg grating type stick force sensor which is characterized by comprising a first relevance parallel beam and a second relevance parallel beam, wherein a first optical fiber Bragg grating strain sensor and a second optical fiber Bragg grating strain sensor are symmetrically pasted on the outer side of one beam in the relevance parallel beams along the axis of the first relevance parallel beam; a third optical fiber Bragg grating strain sensor and a fourth optical fiber Bragg grating strain sensor are symmetrically pasted on the outer side of one beamin the relevance parallel beams along the axis of the second relevance parallel beam; the first optical fiber Bragg grating strain sensor and the third optical fiber Bragg grating strain sensor are linked in series; and the second optical fiber Bragg grating strain sensor and the fourth optical fiber Bragg grating strain sensor are linked in series. The optical fiber Bragg grating type stick force sensor provided by the invention has the characteristics of electromagnetic interference resistance, high accuracy, rapid dynamic response, small volume, light weight, simple structure and the like and has reliability, stability and simplicity.

Description

technical field [0001] The invention relates to an optical fiber Bragg grating type rod force sensor, which can eliminate the influence of temperature on the optical fiber Bragg grating type sensor and effectively improve the precision and sensitivity of the optical fiber Bragg grating type rod force sensor, belonging to the field of optical fiber sensing. Background technique [0002] As a very important branch of fiber optic sensors, fiber Bragg grating sensors have gradually become the focus and hotspot of sensor research. Now the sensor made by the principle of fiber Bragg grating has been widely used in measuring physical quantities such as strain, temperature, pressure and liquid level, and the manufactured sensor has the advantages of small size, high measurement accuracy, anti-electromagnetic interference, corrosion resistance, reliability and stability Good performance, good durability and so on. [0003] In the rod force sensing system, the current mainstream tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24
Inventor 杨德兴张铭姜亚军许增奇
Owner NORTHWESTERN POLYTECHNICAL UNIV