Multi-parameter Distributed Optical Fiber Sensing System

A technology of distributed optical fiber and sensing system, 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 the accuracy and simple structure.

Active Publication Date: 2018-07-31
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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  • Multi-parameter Distributed Optical Fiber Sensing System
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  • Multi-parameter Distributed Optical Fiber Sensing 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 the detection signal to the optical fiber, it first uses an acousto-optic modulator to modulate the optical signal generated by the light source into periodic pulsed light, and makes the periodic pulse The amplitude of the pulse in the light is different. The external vibration information is collected when the pulse amplitude is large, and the external temperature and strain information are collected when the pulse amplitude is small. The light intensity of the Rayleigh scattered light changes more obviously, and it can avoid the Stokes light generated by the optical fiber from introducing nonlinear noise when collecting the external temperature and strain information, thereby improving the accuracy of information collection; using a single The information acquisition channel can realize the distributed multi-parameter acquisition of vibration, temperature and strain, the structure is relatively simple, and the system production cost 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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Patent Type & Authority Patents(China)
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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