Extraction Method of OPGW Optical Cable Seismic Signal Based on Distributed Optical Fiber Sensing

A distributed optical fiber, seismic signal technology, applied in seismic signal receiver, seismology, geophysical measurement and other directions, can solve the problems of high cost, high price, large volume, etc., and achieve the effect of low cost

Active Publication Date: 2022-02-25
TAIYUAN POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +3
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Problems solved by technology

[0002] At present, seismic wave detection systems are mostly used in national professional institutions. Seismic wave detection devices are mostly precision instruments, which are expensive and bulky, and these seismic wave detection devices need to be installed and embedded in specific regions and depths
Therefore, the existing earthquake monitoring system has defects such as large area, high cost, and unfavorable promotion and use in large areas.

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  • Extraction Method of OPGW Optical Cable Seismic Signal Based on Distributed Optical Fiber Sensing
  • Extraction Method of OPGW Optical Cable Seismic Signal Based on Distributed Optical Fiber Sensing
  • Extraction Method of OPGW Optical Cable Seismic Signal Based on Distributed Optical Fiber Sensing

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Embodiment Construction

[0027] The following examples are further explanations and supplements to the present invention, and do not constitute any limitation to the present invention.

[0028] Such as figure 1 Shown, the extraction method of the OPGW optical cable seismic signal based on distributed optical fiber sensing of the present invention, comprises the steps:

[0029] S10. Collect vibration data of the OPGW optical cable through the distributed optical fiber vibration detection device, and store the collected data as a raw data file.

[0030] In this step, a distributed optical fiber vibration monitoring device is firstly installed in the substation computer room, and the OPGW optical cable vibration data is collected through the distributed optical fiber vibration detection device, and the collected data is stored as a raw data file. Of course, the distributed optical fiber vibration detection device is not limited to be installed in the substation computer room, but can be installed in any...

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Abstract

The invention discloses a method for extracting seismic signals of an OPGW optical cable based on distributed optical fiber sensing, including the following steps: a. collecting vibration data of the OPGW optical cable through a distributed optical fiber vibration detection device, and storing the collected data as an original data file; b. Analyze the data in the original data file, analyze the FFT spectrum, and extract the data in the frequency range of 280Hz to 380Hz in the spectrum; c, make a frequency-time line graph; d, filter out mutations from the rate of change of the frequency-time line graph point, and match the sudden point information with the earthquake information released by the seismic network; e, carry out three frequency band data extraction and analysis on the data near the sudden change point, and obtain the frequency-time data of the three frequency bands; f, according to the three frequency bands The frequency-time data of the frequency band is made into a heat map, and the fan-shaped texture is found from the heat map. The invention does not need to erect seismic wave detection sensors, has low cost, is simple and practical.

Description

【Technical field】 [0001] The invention relates to a seismic signal extraction method, in particular to a low-cost, simple and practical OPGW optical cable seismic signal extraction method based on distributed optical fiber sensing. 【Background technique】 [0002] At present, seismic wave detection systems are mostly used in national professional institutions. Seismic wave detection devices are mostly precision instruments, which are expensive and bulky, and these seismic wave detection devices need to be installed and embedded in specific regions and depths. Therefore, the existing seismic monitoring system has defects such as large area occupation, high cost, and unfavorable popularization and use in large areas. [0003] Distributed optical fiber sensing has dual characteristics of sensing and signal transmission, and can realize continuous measurement distributed along the optical fiber. Compared with point sensors and quasi-distributed sensors, distributed optical fiber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00G01V1/18G08B21/10
CPCG01H9/004G01V1/181G08B21/10
Inventor 张凯原军药炜郭举富盛兴隆刘鹏李强张海宽汪骄阳杨逸郭政杨纯李垠韬金燊宋伟赵阳王波赵杨李建勇
Owner TAIYUAN POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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