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A Distributed Optical Fiber Sensing Pipeline Disturbance Event Detection Method

A distributed optical fiber, event detection technology, applied in measurement devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem of high false alarm rate in the system, achieve high detection probability, eliminate interference, and reduce false alarm rate. Effect

Active Publication Date: 2020-11-10
武汉光谷航天三江激光产业技术研究院有限公司
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Problems solved by technology

[0005] The embodiment of the present invention provides a distributed optical fiber sensing pipeline disturbance event detection method, which solves the technical problem in the prior art that the false zero crossing causes a high false alarm rate in the system, effectively eliminates interference, and greatly reduces the false alarm rate. The technical effect of achieving a higher detection probability

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  • A Distributed Optical Fiber Sensing Pipeline Disturbance Event Detection Method
  • A Distributed Optical Fiber Sensing Pipeline Disturbance Event Detection Method

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Embodiment 1

[0024] Such as figure 1 As shown, the present invention provides a method for detecting a disturbance event in a distributed optical fiber sensing pipeline, the method comprising:

[0025] Step 110: Preprocessing the acquired optical fiber sensing signal to obtain the first signal;

[0026] Further, the preprocessing of the acquired optical fiber sensing signal specifically includes: filtering the acquired optical fiber sensing signal for noise reduction.

[0027] Specifically, the distributed optical fiber sensor obtains the optical fiber sensing signal. The distributed optical fiber sensor is a sensor that uses a unique distributed optical fiber detection technology to measure or monitor the spatial distribution and time-varying information along the optical fiber transmission path. It arranges the sensing fiber along the field, and can obtain the spatial distribution and time-varying information of the measured field at the same time, which is attractive for many industria...

Embodiment 2

[0046] Such as figure 2 As shown, the present invention provides a distributed optical fiber sensing pipeline disturbance event detection device, said device comprising:

[0047] pipeline 102;

[0048] Specifically, the pipeline 102 is used for transporting liquid, gas or loose solid. Such as oil pipelines, natural gas pipelines and other pipelines. Such as figure 2 As shown, the embodiment of the present application takes the pipeline laid below the ground surface 104 as an example for explanation, but the present application is not limited to laying the pipeline below the ground surface 104 , and can also be laid above the ground surface 104 .

[0049] Distributed optical fibers, the distributed optical fibers 106 are laid in parallel along the pipeline 102;

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Abstract

The present invention provides a method for detecting a disturbance event in a distributed optical fiber sensing pipeline. The method includes: preprocessing the acquired optical fiber sensing signal to obtain a first signal; obtaining a second signal according to the first signal, Wherein, the second signal is a windowed signal; according to the second signal, calculate the short-term energy of the second signal and the corrected zero-crossing rate; Zero rate to obtain a reference standard deviation; comparing the short-term average energy and zero-crossing rate standard deviation of the disturbance signal to be detected with the reference standard deviation to determine whether the disturbance exists. It realizes the technical effect of effectively eliminating interference, greatly reducing the false alarm rate, and achieving a higher detection probability, and solves the technical problem of high false alarm rate caused by false zero crossing.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to a method for detecting a disturbance event of a distributed optical fiber sensing pipeline. Background technique [0002] As my country's energy demand increases, the scale of oil and gas pipeline construction increases accordingly. Once an accident occurs along the pipeline, it will not only cause huge losses to the pipeline transportation system and industrial production, but also have a serious impact on society and the natural environment. Many factors, including man-made damage and natural disasters, make pipeline inspection more important. [0003] However, in the process of realizing the technical solution of the invention in the embodiment of the present application, the inventor of the present application found that the above-mentioned technology has at least the following technical problems: [0004] In the prior art, the short-term zero-crossing rate is very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 王重阳邱秀分宋聪孙志伟
Owner 武汉光谷航天三江激光产业技术研究院有限公司
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