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Bamboo joint type stress sensing optical cable

A sensing optical cable and bamboo-shaped technology, which is applied in the direction of light guides, optics, optical components, etc., can solve the unfavorable production, storage and transportation, installation and maintenance of micro-bent optical fiber sensing devices, and limit the popularization and use of structural sensing devices and construction Difficulties and other problems, to achieve the effect of simple structure, low cost and good performance

Inactive Publication Date: 2020-03-06
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this typical structure cannot be bent, so it is difficult to construct a distributed or quasi-distributed optical fiber sensing system, and the long-length microbend optical fiber sensing device is not conducive to production, storage, installation and maintenance, which limits the structure of the sensor. Promoting the use of sensing devices

Method used

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  • Bamboo joint type stress sensing optical cable
  • Bamboo joint type stress sensing optical cable
  • Bamboo joint type stress sensing optical cable

Examples

Experimental program
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Embodiment approach

[0027] Implementation: as figure 2 , image 3 and Figure 4 A bamboo-type stress sensing optical cable shown, comprises a plurality of micro-bending units connected in series by the sensing optical fiber 1, and a confining layer 8 arranged outside the micro-bending units, and each of the micro-bending units is formed by a side part A. 2 and B side part 3, on the opposite surfaces of A side part 2 and B side part 3 are respectively arranged with staggered corresponding deformed teeth, including deformed teeth 1 21 and deformed teeth 2 22, the sensing fiber 1 clamps It is held between the deformed teeth on both sides, and there is a gap between adjacent micro-bending units. Preferably, the restraint layer 8 shrinks radially under the action of axial tension. E.g, image 3 There are micro-bending unit 1 5 and micro-bending unit 2 6 on the inner side of the middle bound layer 8 , the sensing fiber 1 is clamped inside the micro-bending unit 1 5 and the micro-bending unit 2 6 ,...

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Abstract

The invention discloses a bamboo joint type stress sensing optical cable. The bamboo joint type stress sensing optical cable comprises a plurality of micro-bend units connected in series by a sensingoptical fiber, and a bind-up layer arranged at outside of the micro-bend units, wherein each micro-bend unit is composed of an A side part and a B side part, moreover, interlaced corresponding deformation teeth are respectively distributed on opposite surfaces of the two sides, the sensing optical fiber is clamped between the deformation teeth of the two sides, and a gap exists between neighboringmicro-bend units. When the sensing optical cable bears axial tension, the bind-up layer shrinks on a radial direction of the sensing optical cable, thus, a bending state of the sensing optical fiberis changed, and the change can be detected by a test instrument mounted at a tail end of the sensing optical fiber.

Description

technical field [0001] The invention relates to an optical fiber cable for sensing, in particular to a sensing optical cable based on the bending effect of an optical fiber. Background technique [0002] Landslide disaster is the third largest geological disaster after earthquakes and floods. Due to the different geological structures, the formation and development process of landslides are complex. How to monitor the changes of landslides in real time is a research hotspot, especially monitoring the deep parts of landslides. Displacement is one of the key parameters, and optical fiber sensing is one of the most potential sensing systems for landslide monitoring. However, the optical fiber is very thin, and the common outer diameter of the optical fiber is between 0.25 mm and 0.90 mm. In actual engineering, a small sand and stone may damage the optical fiber; in addition, the protection of the optical fiber should not be too much, otherwise the transmission of the optical fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44
CPCG02B6/4415G02B6/443
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH