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A pipeline distributed optical fiber sensor initial strain control device and its control method

A distributed optical fiber and optical fiber sensor technology, applied in the direction of optical devices, measuring devices, instruments, etc., can solve the problems that do not involve the initial strain control method and device of distributed optical fiber sensors, and achieve the effect of improving measurement accuracy

Active Publication Date: 2018-08-28
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Analyzing the research status and patent situation at home and abroad, it can be found that there is no patent related to the initial strain control method and device of the distributed optical fiber sensor.

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  • A pipeline distributed optical fiber sensor initial strain control device and its control method
  • A pipeline distributed optical fiber sensor initial strain control device and its control method
  • A pipeline distributed optical fiber sensor initial strain control device and its control method

Examples

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Embodiment 1

[0030] This embodiment provides a pipeline distributed optical fiber sensor initial strain control device, which is used to uniformly stretch the distributed optical fiber sensor 5 and lay it on the surface of the pipeline 1 to be detected. figure 1 , 2 , which mainly includes two pulley fixing units, pulley 4, weight 7 and fiber optic sensor binding appliance 6.

[0031] The pulley fixing unit is composed of a rigid bracket 2 and a ring clamp 3, and the ring clamp 3 is fastened on the pipeline 1 by bolts, and the specific size of its inner diameter matches the outer diameter of the pipeline; the rigid bracket 2 is composed of a cross bar , the vertical rod and the diagonal brace are fixedly connected, the horizontal rod is fixedly connected above the ring clamp 3, the vertical rod is vertically fixed on the outer end of the horizontal rod, and the diagonal brace is fixedly connected between the above vertical rod and the horizontal rod, It plays the role of rigid support for...

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Abstract

The invention discloses an initial strain control apparatus for a distributed fiber sensor of a pipe and a control method thereof. The control apparatus comprises two pulley fixed units, pulleys, a weight, and fiber sensor binding units. The pulley fixed units are formed by rigid supports and annular clamps; the annular clamps are fastened at a pipe; and two pulleys are installed at each pulley fixed unit. The fiber sensor binding units consist of rigid outer sleeves, flexible inner sleeves, and rope bodies; and the rope bodies wind around the external surfaces of the rigid outer sleeves tightly. In addition, the initial strain control method includes: a laying orientation of a fiber sensor is determined; the two pulley fixed units are fixed at the left end and the right end of the pipe; the fiber sensor goes around the pulleys; the fiber sensor binding units sleeve the two free ends of the fiber sensor and are bound by nylon wires, and a protruding component and the weight are connected respectively; and then the distributed fiber sensor adheres to the surface of the pipe. The apparatus and the method have the following beneficial effects: the initial stress of the fiber sensor is guaranteed to be in a uniform state; and the measurement precision of the distributed fiber sensor is improved.

Description

technical field [0001] The invention relates to a pipeline distributed optical fiber sensor initial strain control device and a control method thereof, and belongs to the technical fields of structural health monitoring and marine engineering. Background technique [0002] Since the advent of distributed fiber optic sensors, due to their high reliability, corrosion resistance, low transmission loss, long transmission distance, and immunity to electromagnetic interference, they have made great progress in the field of structural health monitoring. In particular, the linear long-distance measurement characteristics of fiber optic sensors make it one of the ideal technologies for various pipeline safety monitoring. In the safety monitoring of oil and gas pipelines, the currently used fiber optic sensor technologies mainly include three types: fiber Bragg grating (FBG) technology, distributed fiber optic temperature measurement technology and distributed fiber optic strain monit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 陈同彦李勇徐志刚吴敏冯春健岳晟刘锦昆李毅季文峰蒋习民谭勇李恩清张贺张先锋杨柳
Owner CHINA PETROLEUM & CHEM CORP
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