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

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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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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