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Coreless optic fiber hybrid sensor and experimental system

An optical fiber sensor and coreless optical fiber technology, which is applied in the direction of using optical devices to transmit sensing components, can solve problems such as crosstalk of different parameters, and achieve the effect of solving crosstalk.

Pending Publication Date: 2018-11-30
STATE GRID CORP OF CHINA +2
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  • Abstract
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Problems solved by technology

[0004] The embodiment of the present invention provides a coreless optical fiber hybrid sensor and an experimental system to solve the problem of crosstalk between different parameters

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  • Coreless optic fiber hybrid sensor and experimental system
  • Coreless optic fiber hybrid sensor and experimental system
  • Coreless optic fiber hybrid sensor and experimental system

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Embodiment Construction

[0021] 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.

[0022] The external cavity optical fiber Fabry-Perot sensor (referred to as F-P sensor) consists of a single-mode-coreless-single-mode F-P cavity. Compared with FBG, it has many advantages: the F-P sensor is not based on the principle of ultraviolet light refractive index modulation, and can withstand higher The cross-sensitivity to temperature is far less than that of the FBG sensor. When the temperature change is relatively stable, the influence of the temper...

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Abstract

The invention provides a coreless optic fiber hybrid sensor and an experimental system. The coreless optic fiber hybrid sensing experimental system comprises a coreless optic fiber hybrid sensor, broadband light source, a spectrograph and a coupler. The coreless optic fiber hybrid sensor comprises a Michelson optic fiber sensor and an F-P cavity structure. The Michelson optic fiber sensor and theF-P cavity structure are in cascade connection. The F-P cavity structure comprises two single-mode fibers and one coreless fiber. The coreless fiber is welded between the two single-mode fibers, and aFresnel reflection film is formed at the welding position. The light generated by the broadband light source enters the Michelson optic fiber sensor through the coupler. Part of the light travels through the cladding of Michelson optic fiber sensor, is reflected back to a fiber core of the Michelson optic fiber sensor by the Fresnel reflection film of the F-P cavity structure, is in interferencewith the other part of the light propagating in the fiber core of the Michelson optical fiber sensor, and returns to a spectrometer. The problem of crosstalk between different parameters is solved byusing the filtering and sensing characteristics of optical fiber type interference.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a coreless optical fiber hybrid sensor and an experimental system. Background technique [0002] During the use of the dam, under the long-term action of complex loads and with the aging of materials, the resistance of the dam structure decays, and catastrophic accidents will occur under extreme working conditions, seriously endangering people's lives, property and safety. In recent years, with the construction of ultra-high dams at home and abroad such as Xiaowan, Jinping II, Xiluodu and other super-large water conservancy projects, in order to ensure the safety, integrity, applicability and durability of the dam structure, many major dams have been built. Engineering structures and infrastructure urgently need to adopt effective means to detect and evaluate their safety status, repair and control damage, and provide early warning of damage caused by various reason...

Claims

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Application Information

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IPC IPC(8): G01D5/26
CPCG01D5/26
Inventor 郑雪琴马保东王勇桂中华杜雅楠李佳霖戴江鸿兰柏潘凌陈瑞董阳伟卢伟甫孙晓霞于珊孙慧芳马传宝凌超王珏
Owner STATE GRID CORP OF CHINA
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