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Data processing method and device based on distributed optical fiber temperature measurement

A distributed optical fiber and data processing technology, applied to measuring devices, thermometers, measuring heat, etc., can solve the problems of heavy processing burden, long processing time, and accumulated data in signal segments, etc., and achieve safe and convenient use and good denoising effect , the effect of suppressing noise

Inactive Publication Date: 2019-11-15
STATE GRID HEBEI ENERGY TECH SERVICE CO LTD +3
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Problems solved by technology

[0004] The present invention provides a data processing method and device based on distributed optical fiber temperature measurement, which can effectively solve the problem of temperature measurement caused by the accumulation of signal segments for a long time in the existing distributed optical fiber temperature measurement data processing proposed in the background technology. The data display is slow, and because the accumulated data of the signal segment is large, the processing time is long and the processing burden is heavy, which further reduces the temperature data detection rate, which is not conducive to quickly understanding the temperature at the sensing fiber

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  • Data processing method and device based on distributed optical fiber temperature measurement

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[0039] Example: such as Figure 1-2 As shown, the present invention provides a technical solution, a data processing method based on distributed optical fiber temperature measurement, comprising the following steps:

[0040] S1. Signal sampling: Accumulate and store signals through synchronous accumulation method;

[0041] S2. Signal processing: sequentially process the accumulated and stored multi-segment signals;

[0042] S3. Signal output: Bring the output signal into the formula to obtain the temperature at the local area of ​​the optical fiber.

[0043] According to the above technical solution, in step S1, the signal is accumulated N times by the synchronous accumulation method, and n times are set as a group, where N=an, n≠0, when it is carried out to the nth time, 1~n The cumulative signal output of the time period is stored and recorded as Tn. When it is performed 2n times, the accumulated signal output of the n~2n time period is stored and recorded as T2n, and the ...

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Abstract

The invention discloses a data processing method and device based on distributed optical fiber temperature measurement. The method comprises the following steps: signal sampling, signal processing andsignal output.Single processing data is reduced by setting multi-segment accumulation, so that the processing process is accelerated, a user can know the sensing temperature more quickly, and finally, the temperature at the local area of the optical fiber can be more accurately known by averaging all temperatures; besides, in the processing process, initial noise reduction is achieved by time domain signal cumulative average detection, and most of the noise is effectively removed; low-frequency noise in signals is removed by digital accumulation, the interference caused by noise with zero-average statistical characteristic in an optical fiber temperature measurement system is reduced; finally,the noise is almost completely suppressed by soft threshold wavelet transform, and characteristicpeak points reflecting original signals can be well preserved, so that the noise reduction effect is better, and approximate optimal estimation of the original signals can be obtained.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber sensing, in particular to a data processing method and device based on distributed optical fiber temperature measurement. Background technique [0002] Distributed optical fiber temperature measurement technology is a new type of temperature measurement technology. Distributed optical fiber temperature sensing technology can detect the location of local hot spots in the power cable temperature in time, calculate the current carrying capacity of the conductor and detect the insulation state of the operating line. It has intrinsic safety, With the advantages of accurate temperature measurement, large monitoring range and no electromagnetic interference, it is suitable for applications that require large-scale multi-point measurement. In order to improve the signal-to-noise ratio in the existing distributed optical fiber temperature measurement data processing, long-term Accumulatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 王丽丽范晓舟高树国刘云鹏孙路律方成邢超张克谦相晨萌
Owner STATE GRID HEBEI ENERGY TECH SERVICE CO LTD
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