Optical fiber event identification method based on angle detection
An angle detection and identification method technology, applied in measuring devices, using optical devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of high-sensitivity fading of optical fiber sensing, inaccurate testing, easy to cause false alarms, etc., to achieve speed and performance improvement, fading avoidance, and cost reduction effects
Inactive Publication Date: 2019-04-26
江苏光为传感设备有限公司
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[0005] Aiming at the deficiencies of the prior art, the present invention provides an optical fiber event recognition method based on angle detection, which has the advantages of classifying vibration sources and improving recognition accuracy, and solves the problem of high sensitivity and fading of optical fiber sensing in some prevention fields. It is easy to cause false positives and lead to inaccurate tests
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[0025] The following describes the technical solutions in the embodiments of the present invention clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, there are other embodiments obtained by those of ordinary skill in the art without creative work, which fall within the protection scope of the present invention.
[0026] See figure 1 , The present invention proposes a method for identifying optical fiber events based on angle detection, which includes the following steps:
[0027] S1: Data input: input the previously transported comparison data into the data center in the vibration sensor host;
[0028] S2: Spectrum calculation: The vibration sensor host collects data in a certain format;
[0029] S3: Spectrum interval energy accumulation: Perform Fourier (FFT) changes on the collected data to obtain the spectrum energy map of each ...
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The invention relates to the technical field of optical fiber event identification methods and discloses an optical fiber event identification method based on angle detection. The method comprises thefollowing steps of: S1, inputting data, wherein comparison data subjected to transportation is input into a data center in a vibration sensing main machine, S2, calculating a frequency spectrum, wherein data is acquired by the vibration sensing main machine according to a certain format; S3, accumulating frequency spectrum interval energy, wherein Fourier (FFT) change is carried out on the acquired data to obtain a frequency spectrum energy map of each position, a frequency spectrum range of 0-400Hz is taken, and the energy distribution in the frequency spectrum range is calculated; S4, basing on a simple threshold, a threshold value is determined, the point exceeding the threshold value is reserved as an event point and is in a coordinate system taking time, distance and event as coordinates. The thread rubbing processing method of a combined screw can solve the problems of inaccurate test caused by error report easily caused by the influence of high sensitivity, fading and the likeof optical fiber sensing in some prevention fields in the prior art.
Description
Technical field [0001] The present invention relates to the technical field of optical fiber event identification methods, in particular to an optical fiber event identification method based on angle detection. Background technique [0002] The distributed optical fiber vibration sensing system has the advantages of anti-electromagnetic interference, good electrical insulation, corrosion resistance, high sensitivity, and can realize long-distance perimeter monitoring, and can directly use the buried underground communication optical cable. It can be used to monitor and protect important areas and places such as national borders, military bases, power plants, oil pipelines, nuclear facilities and prisons. When the sensing fiber is disturbed by the outside world, part of the characteristics of the transmitted light in the fiber will change. The identification terminal collects the signal, analyzes the characteristics of the collected signal to determine the change in its optical ch...
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IPC IPC(8): G01H9/00G01B11/26
CPCG01B11/26G01H9/004
Inventor 陈凯
Owner 江苏光为传感设备有限公司