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Low-cost long-distance fiber Bragg grating sensor demodulation system

A Bragg grating and demodulation system technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., can solve the problems of complex system and high cost of demodulation system, and achieve the effect of efficient adjustment

Inactive Publication Date: 2018-09-14
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing fiber Bragg grating sensor demodulation system is costly and complex

Method used

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  • Low-cost long-distance fiber Bragg grating sensor demodulation system
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  • Low-cost long-distance fiber Bragg grating sensor demodulation system

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referre...

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Abstract

The invention relates to the technical field of fiber Bragg gratings and particularly relates to a low-cost long-distance fiber Bragg grating sensor demodulation system. The low-cost long-distance fiber Bragg grating sensor demodulation system comprises a computer body; the computer body is linearly connected with a wavelength adjusting system and an adjusting box; the wavelength adjusting systemis linearly connected with a second extraction fiber; the adjusting box is linearly connected with the fiber Bragg grating and a monitoring module; the fiber Bragg grating is linearly connected with aremote terminal, a sensor and a compensation sensor; one end, far away from the fiber Bragg grating, of the compensation sensor is linearly connected with an adjusting module; one end, far away fromthe adjusting box, of the monitoring module is linearly connected with a cable; and the remote terminal is linearly connected with a solar module and a wireless module. The low-cost long-distance fiber Bragg grating sensor demodulation system had the advantages of resisting electromagnetic interference, being stable in performance and long in monitoring distance, being not affected by light strength and the like, and is particularly suitable for being used in a strong electromagnetic environment of an insulator and adverse temperature and humidity environments, and the system cost is low.

Description

technical field [0001] The invention relates to the technical field of fiber Bragg gratings, in particular to a low-cost long-distance fiber Bragg grating sensor demodulation system. Background technique [0002] Bragg gratings are now mainly divided into two categories: fiber Bragg gratings (FBG) and volume Bragg gratings (VBG). [0003] Volume Bragg grating (VBG) is a new type of grating element. It is based on the technology of photosensitive glass (Photo-Thermo-Refractive, referred to as PTR). ) The permanent change of the refractive index, thus forming a regular internal refractive index distribution inside the PTR. It is with this holographic technique that a volumetric Bragg grating (VBG) is fabricated. [0004] The existing optical fiber Bragg grating sensor demodulation system is costly and complex. Contents of the invention [0005] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a low-cost long-distance optical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35316
Inventor 董波
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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