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Multi-parameter distributed optical fiber sensing system

A distributed optical fiber and sensing system technology, applied in the field of information detection, can solve the problems of complex structure and high construction cost of multi-parameter acquisition system, and achieve the effect of improving the accuracy of information acquisition, improving accuracy and simple structure

Active Publication Date: 2017-01-04
成都塔科光电技术有限公司
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Problems solved by technology

[0004] The invention provides a multi-parameter distributed optical fiber sensing system to solve the problem of complex structure and high construction cost of the multi-parameter acquisition system

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0032] In the description of the present invention, unless otherwise specified and limited, it should be noted that the term "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be Directly connected or indirectly connected through an intermediary, those skilled in the art can understand the specific meanings of the above terms according to specific situations.

[0033] see figure 1 , is a ...

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Abstract

The invention provides a multi-parameter distributed optical fiber sensing system. When the system transmits a detection signal to an optical fiber, an acousto-optic modulator is used to modulate an optical signal generated by a light source into a periodic pulse light. The magnitude of pulses in the periodic pulse light is different. External vibration information is collected when the pulse amplitude is large. When the pulse amplitude is small, the external temperature and strain information are collected. When the external vibration information is collected, the light intensity change of a Rayleigh scattered light generated by the optical fiber is obvious. Non-linear noise introduced by a stokes light generated by the optical fiber can be avoided when the external temperature and strain information are collected. The accuracy of information collection can be improved. A single information acquisition channel can be used to realize distributed multi-parameter acquisition of vibration, temperature and strain. The structure is relatively simple. The production cost of the system can be reduced.

Description

technical field [0001] The invention belongs to the field of information detection, and in particular relates to a multi-parameter distributed optical fiber sensing system. Background technique [0002] In the health monitoring and diagnosis of major projects and infrastructures such as large-scale building structures, aerospace, petrochemical, and power systems, optical fiber sensing technology has gradually gained popularity due to its small sensitive components, high durability, absolute measurement, and distributed monitoring. It is a trend to replace electrical sensors as the preferred sensitive components for sensor health monitoring. Among them, the technical research and application of distributed monitoring of vibration, temperature and strain in a long-distance range by using optical fiber is continuously deepening. [0003] In the existing technology, vibration, temperature and strain information need to be monitored by independent systems, which not only increas...

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Application Information

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IPC IPC(8): G01D5/353G01K11/32G01B11/16G01K11/322
CPCG01B11/16G01D5/35364G01K11/32G01K11/322
Inventor 朱涛张敬栋
Owner 成都塔科光电技术有限公司
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