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Optical fiber strain sensor based on bellows spring structure and preparation method thereof

A spring structure and optical fiber strain technology, which can be used in instruments, optical devices, measuring devices, etc., can solve the problems of low strain sensitivity of optical fiber strain sensors, and achieve the effect of easy interference length, easy deformation, and increased deformation ability.

Inactive Publication Date: 2020-06-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The application provides an optical fiber strain sensor based on a bellows spring structure and a preparation method thereof to solve the technical problem of low strain sensitivity of an optical fiber strain sensor based on a Fabry-Perot interferometer

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  • Optical fiber strain sensor based on bellows spring structure and preparation method thereof
  • Optical fiber strain sensor based on bellows spring structure and preparation method thereof
  • Optical fiber strain sensor based on bellows spring structure and preparation method thereof

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Embodiment Construction

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0038] In the first aspect, the application provides an optical fiber strain sensor based on a bellows spring structure, such as figure 1 with figure 2 shown, including:

[0039] A hollow quartz tube, a first single-mode optical fiber 1 and a second single-mode optical fiber 2, the hollow quartz tube includes a first area 3, an intermediat...

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Abstract

The invention provides an optical fiber strain sensor based on a corrugated pipe spring structure and a preparation method thereof. Firstly, a first single-mode optical fiber is inserted into a firstarea and is welded together; then, the middle area of the hollow quartz tube is heated; a single micro-bubble can be formed in the middle area after one-time heating; cascade microbubbles can be formed in the middle area after multiple times of heating; a second single-mode optical fiber is inserted into the single microbubble or the microbubble at the outermost edge of the cascaded microbubble; in this way, the optical fiber strain sensor is obtained, the deformation capacity of the optical fiber strain sensor can be improved through the single microbubble or the cascaded microbubble, the optical fiber strain sensor is easier to deform and higher in sensitivity, and the size of L can be flexibly adjusted by adjusting the preparation process; in conclusion, the cascaded microbubbles in theoptical fiber strain sensor based on the corrugated pipe spring structure provided by the invention can enable the sensor to deform more easily, and the interference length is easy to adjust at the same time.

Description

technical field [0001] The present application relates to the technical field of optical fiber sensors, in particular to an optical fiber strain sensor based on a bellows spring structure and a preparation method thereof. Background technique [0002] The optical fiber strain sensor has the advantages of simple structure, fast response speed and anti-electromagnetic interference. It has been widely used in the real-time measurement of temperature, pressure and other parameters of high-voltage cables and other facilities. The sensitivity of the conventional optical fiber strain sensor is relatively low, resulting in The strain error is large. [0003] The fiber optic strain sensor based on the Fabry-Perot interferometer is made by fusing a section of quartz capillary between the optical fibers. The strain force applied to the axial direction of the quartz capillary limits the sensitivity to only 1pm / με; in order to improve the Fabry-Perot interferometer based Commonly used m...

Claims

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Application Information

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IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 钱国超雷嘉丽彭庆军陈伟根邹德旭王建新张知先王山洪志湖
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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