Signal enhancement method and system for distributed perimeter system based on time-domain reflectometry technology

A technology of time domain reflection and system signal, applied in the field of signal processing, can solve the problems of strong noise and weak sensing signal, and achieve the effect of signal enhancement and poor signal-to-noise ratio.

Active Publication Date: 2014-12-03
WUHAN WUTOS
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a filtered signal with less distortion and enhanced Effective excitation signal, signal enhancement method and system of distributed perimeter system based on time domain reflection technology to obtain better signal-to-noise ratio

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  • Signal enhancement method and system for distributed perimeter system based on time-domain reflectometry technology
  • Signal enhancement method and system for distributed perimeter system based on time-domain reflectometry technology

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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The signal enhancement method of the distributed perimeter system based on the time-domain reflection technology of the present invention can effectively solve the characteristics of weak time-domain reflection signals, and preserve signal information as much as possible while improving the signal. The present invention mainly uses wavelet analysis, wavelet analysis is a window method with variable range, it can obtain more accurate low-frequency information with a long time interval, and can also obtain more accurate high-frequency information with a short time interval, so it It has goo...

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Abstract

The invention discloses a signal enhancement method and system for a distributed perimeter system based on the time-domain reflectometry technology. The method comprises the following steps of caching sensing signals acquired within a preset time, carrying out discrete wavelet decomposition on the cached sensing signals, extracting the decomposition low-frequency coefficient of each order of decomposed signals, reconstructing the decomposed signals according to the decomposition low-frequency coefficient of each order of decomposed signals to obtain reconstructed signals, calculating a difference value sequence of the reconstructed signals to remove the low low-frequency interference part, in the reconstructed signals, of the distributed perimeter system, and carrying out summation on the difference value sequence to obtain enhanced excitation signals. According to the signal enhancement method and system, the signal-to-noise ratio of the distributed perimeter system based on the time-domain reflectometry technology can be increased.

Description

technical field [0001] The present invention relates to a signal processing method, in particular to a distributed perimeter system signal enhancement method and system based on time domain reflection technology. Background technique [0002] Oil pipelines have the characteristics of large pipe diameter, high pressure and large transportation volume. Due to sudden natural disasters such as the gradual aging of pipeline anti-corrosion coatings, as well as man-made drilling and oil theft, oil leakage occurs from time to time, seriously threatening The safety of the oil pipeline transmission line has been compromised, and a series of serious consequences such as the loss of crude oil, environmental pollution, and suspension of production and transportation have been caused. [0003] The distributed perimeter system based on time domain reflectometry has the characteristics of high sensitivity, large dynamic range, and long-distance continuous monitoring, etc., and has broad app...

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Application Information

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IPC IPC(8): G08B13/18
Inventor 刘军荣印新达闫奇众董雷
Owner WUHAN WUTOS
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