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Device for detecting wave spring optical fiber bending loss

A bending loss and detection device technology, which is applied in the direction of transmitting sensing components with optical devices, can solve the problem of hindering the improvement of the dynamic range and precision of the fiber attenuator, limiting the dynamic range and precision of the fiber attenuator, and the size of the plate cannot be too large and other issues, to achieve reliable and fast testing, low production and operating costs, and high practical value

Inactive Publication Date: 2012-07-04
XIAN JINHE OPTICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The solution provided by Chinese patent 87107210 is based on the microbending loss of the optical fiber to realize the microbending optical fiber strain gauge, but because it is realized by two plates, the size of the plates cannot be too large, so that the length of the bendable optical fiber Limited, hindering the improvement of dynamic range and accuracy of this type of fiber attenuator
In addition, the adjustable distance of the relative movement of the two plates is only a few hundred microns at most, and the two plates must be kept basically parallel during the movement, so this type of attenuator has high requirements for the mechanical structure of the adjustment, which not only increases the implementation cost, It also limits the improvement of the dynamic range and precision of this type of fiber attenuator

Method used

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  • Device for detecting wave spring optical fiber bending loss
  • Device for detecting wave spring optical fiber bending loss
  • Device for detecting wave spring optical fiber bending loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 The shown a kind of corrugated spring optical fiber bending loss detection device comprises a first signal optical fiber 33, a curved test channel for the first signal optical fiber 33 to pass through, and is connected to the first signal optical fiber 33 and connected to the first signal optical fiber 33. A test unit 5 for synchronously testing the power variation of the optical signal in the test unit 5, the test unit 5 is connected with a processing unit 7, and the curved test channel includes a curved support 10 composed of at least two layers of corrugated spring wire. The wavy concave-convex of the upper corrugated spring wire-4-1 of the curved support 10 and the wavy concave-convex of the lower corrugated spring wire-4-2 are staggered correspondences, and between the convex heads of the two are formed for one or more first A curved test channel through which the signal optical fiber 33 passes, and the wave-shaped concave-convex of the upper corru...

Embodiment 2

[0047] Such as image 3 As shown, the only difference between this embodiment and Embodiment 1 is that the curved bracket 10 is made of multi-layer corrugated spring wire, which can further extend the length of the first signal optical fiber 33 as the sensing area and improve the test sensitivity. In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

Embodiment 3

[0049] Such as Figure 4 , Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the curved bracket 10 is formed of a helical structure made of multi-layer corrugated spring wire, which not only prolongs the length of the sensing area of ​​the first signal optical fiber 33, but also improves the test sensitivity. , and other physical quantities can be tested, for example, after the curved stent 10 is bent as a whole, the overall bending curvature can be detected. In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

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Abstract

The invention discloses a device for detecting wave spring optical fiber bending loss, which comprises a first signal optical fiber, a curve testing channel for the first signal optical fiber to penetrate through and a testing unit connected with the first signal optical fiber and used for conducting synchronous testing on power variation of optical signals in the first signal optical fiber. The testing unit is connected with a processing unit. The curve testing channel comprises a curve support formed by at least two layers of wave spring wires. Wave concave and convex of a first upper wave spring wire on the curve support correspond to wave concave and convex of a first lower wave spring wire on the curve support in staggered mode. The curve testing channel for one or more first signal optical fibers to penetrate through is formed between convex portions of the first upper wave spring wire and the first lower wave spring wire, and the wave concave and convex of the first upper wave spring wire and the first lower wave spring wave are arranged on two sides of the first signal optical fiber correspondingly. The device for detecting the wave spring optical fiber bending loss is simple in structure, reasonable in design and convenient to process and manufacture and saves a large amount of manufacture time.

Description

technical field [0001] The invention relates to a detection device, in particular to a corrugated spring optical fiber bending loss detection device. Background technique [0002] There are many types of existing optical fiber sensors, mainly including light intensity adjustable optical fiber sensors, fiber grating sensors, and optical fiber interference sensors. The latter two are characterized by high sensing sensitivity, but in the actual application process, there are complex equipment , High operating costs and other defects and deficiencies, which greatly restrict the application and promotion of optical fiber sensors. Especially for high-sensitivity optical fiber sensors, which will respond to changes in various environmental conditions during use, such as optical fiber interference sensors, due to their high sensitivity, but when they are applied to actual conditions, it is found that temperature, air pressure, Environmental factors such as vibration will affect its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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