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High-sensitivity wide-range stress-strain sensing optical cable and monitoring method thereof

A technology of stress-strain and sensing optical cables, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of being easily affected by the environment, small monitoring range, and low monitoring sensitivity, so as to reduce the difficulty of laying and increase the measurement range , Increase the effect of monitoring range

Active Publication Date: 2013-03-20
CHINA XIDIAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional sensing optical cables are mainly divided into two categories. One is the sensing optical cable with tight sleeve structure, which is mainly used for stress and strain monitoring of regular objects. The disadvantage is that the monitoring range is small and it is easily affected by the environment; the second type is redundant. Structural sensing optical cables are mainly used for the monitoring of complex structures and complex environments. The disadvantage is that the monitoring sensitivity is low.

Method used

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  • High-sensitivity wide-range stress-strain sensing optical cable and monitoring method thereof
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  • High-sensitivity wide-range stress-strain sensing optical cable and monitoring method thereof

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Embodiment Construction

[0030] see figure 1 , figure 2 , the high-sensitivity wide-range stress-strain sensing optical cable used in the safety monitoring of structures in the present invention comprises an outer sheath 1 and a strengthening member 2 of twisted structure arranged in the outer sheath 1, a semi-tight sleeve Sensing unit 3 and loose sleeve sensing unit 4. The reinforcement member 2, the semi-tight sleeve sensing unit 3 and the loose sleeve sensing unit 4 are placed in parallel.

[0031] The strengthening member 2 in the sensing optical cable can be made of metal material or non-metallic material, and the structural size of the strengthening member 2 is consistent with the size of the loose-tube sensing unit 4 . The pitch ratio of stranding ranges from 40 to 100; the number of stranding elements is 2 to 7; the diameter of a single element is 0.4 to 1.2 mm; the stranding form is concentric stranding.

[0032] see image 3 , the semi-tight sleeve sensing unit 3 includes first sensing ...

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Abstract

The invention discloses a high-sensitivity wide-range stress-strain sensing optical cable for structure safety monitoring, and a monitoring method of the optical cable. The optical cable comprises an outer protection layer, a reinforcing member, a half-tight sleeve sensing unit and a loose sleeve sensing unit, wherein the reinforcing member adopts a twisted structure; and the reinforcing member, the half-tight sleeve sensing unit and the loose sleeve sensing unit are placed in parallel. According to the optical cable, the testing sensitivity of the half-tight sleeve sensing unit is improved by the reinforcing member in the twisted structure, and a range scope of the stress-strain sensing optical cable is expanded by regulating excessive length of the loose sleeve sensing unit and a testing scope of the half-tight sleeve sensing unit. The optical cable can be applied to various measuring occasions, has an extremely large measuring range and takes the measuring sensitivity into consideration, categories of the sensing optical cable are reduced, the cost is saved, and the laying difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of signal detection and analysis, and relates to a high-sensitivity wide-range stress-strain sensing optical cable and a monitoring method thereof for structure safety monitoring. Background technique [0002] In recent years, in structural health monitoring and geological disaster monitoring, the optical fiber sensing monitoring system using Brillouin distributed optical fiber monitoring technology has been developed rapidly. At present, the manual data collection method based on conventional electrical measuring sensors is widely used in engineering However, this method has small monitoring range, heavy workload, low efficiency, and large investment, and cannot guarantee the long-term stability and accuracy of monitoring data. Optical fiber sensors have the characteristics of anti-electromagnetic interference, waterproof, corrosion resistance, long durability, wide measurement range, and easy laying and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44G01B11/16
Inventor 陈勇是溪明张富县査云飞
Owner CHINA XIDIAN GRP CO LTD
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