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Long-distance distributed Brillouin dynamic strain measurement system

A dynamic strain and measurement system technology, applied in the field of measurement systems, can solve problems such as difficult to meet long-distance dynamic strain measurement, and achieve the effects of eliminating polarization fading, reducing average times, and reducing average times

Inactive Publication Date: 2018-11-16
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sensing distance of the existing F-BOTDA is usually on the order of hundreds of meters, which is difficult to meet the long-distance dynamic strain measurement

Method used

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Embodiment Construction

[0014] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0015] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0016] Please refer to figure 1 As shown, it is a block diagram of a preferred embodiment of a lo...

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Abstract

The invention discloses a long-distance distributed Brillouin dynamic strain measurement system, and the system comprises a narrow linewidth laser, a coupler, a first light modulator, a second light modulator, a first optical amplifier, a second optical amplifier, a microwave source, an arbitrary waveform generator, a first dense wavelength division multiplexer, a second dense wavelength divisionmultiplexer, a circulator, a first polarization controller, a second polarization controller, a polarization beam combiner, a sensing fiber, an isolator, and a balance detector. The system provided bythe invention can achieve the measurement of a long-distance object, and is lower in cost.

Description

technical field [0001] The invention belongs to a measurement system, in particular to a long-distance distributed Brillouin dynamic strain measurement system based on pump pulse frequency sweep and cyclic coding. Background technique [0002] With the continuous construction of large-scale infrastructure, online safety and health monitoring and fault prevention of facilities such as large bridge structures, oil pipelines, highways, and railways have become important needs for economic development. However, due to the huge scale and complex structure of this type of infrastructure, it is difficult to meet its monitoring requirements with traditional point sensors. Due to its excellent characteristics such as anti-electromagnetic interference, small size, light weight, high sensitivity, and continuous distributed measurement of measurement targets, distributed optical fiber sensing technology has become one of the important means of monitoring the health status of large build...

Claims

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Application Information

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IPC IPC(8): G01B11/16
CPCG01B11/168
Inventor 朱涛郑华张敬栋
Owner CHONGQING UNIV