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A distributed optical fiber vibration signal noise reduction method based on variational mode decomposition

A technology of variational mode decomposition and distributed optical fiber, which is applied in character and pattern recognition, instrumentation, calculation, etc., can solve the problems of low signal-to-noise ratio of optical fiber vibration data and poor accuracy of optical fiber vibration signal

Pending Publication Date: 2019-05-07
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] This application provides a noise reduction method for distributed optical fiber vibration signals based on variational mode decomposition to solve the technical problems of low signal-to-noise ratio of optical fiber vibration data and poor accuracy of optical fiber vibration signal processing in the prior art

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  • A distributed optical fiber vibration signal noise reduction method based on variational mode decomposition
  • A distributed optical fiber vibration signal noise reduction method based on variational mode decomposition
  • A distributed optical fiber vibration signal noise reduction method based on variational mode decomposition

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[0044] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0045] Such as figure 1 As shown, it is a schematic diagram of a noise reduction method for distributed optical fiber vibration signals based on variational mode decomposition provided by the embodiment of the present application;

[0046] This application provides a noise reduction method for distributed optical fiber vibration signals base...

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Abstract

The invention discloses a distributed optical fiber vibration signal noise reduction method based on variational mode decomposition. The method comprises the steps that distributed optical fiber vibration signals are acquired, variational mode decomposition is conducted on the distributed optical fiber vibration signals, original signals can be divided into components of different modes, high-frequency noise in the vibration signals can be filtered out in the decomposition process, high-frequency noise of the vibration signals is filtered out, and good signal-to-noise separation performance isachieved; Wavelet packet threshold denoising is carried out on each modal component, and types of noise such as granular noise and low-frequency noise in environment noise can be further filtered out. And the processed signal is reconstructed to obtain the denoised optical fiber vibration data, so that the signal-to-noise ratio of the optical fiber vibration data and the optical fiber vibration signal processing accuracy can be effectively improved.

Description

technical field [0001] The present application relates to the technical field of vibration signal processing, in particular to a noise reduction method for distributed optical fiber vibration signals based on variational mode decomposition. Background technique [0002] The distributed optical fiber interference vibration detection system has the advantages of high sensitivity, good real-time signal processing, long monitoring distance, and large dynamic detection range. middle. [0003] Since the distributed optical fiber interference vibration detection system is an interference sensing system, the system is very sensitive to the external environment, and the detected disturbance signal often has background noise. These background noises mainly include thermal noise, shot noise and low frequency noise. When the signal is greatly affected by noise, the useful signal may be completely submerged in the noise, and the vibration signal cannot be detected accurately, so it is ...

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Application Information

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IPC IPC(8): G06K9/00G01H9/00
Inventor 彭庆军钱国超古洪瑞陈伟根万福马仪程志万周仿荣邹德旭黄星洪志湖刘光祺颜冰
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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