Optical fiber length automatic calibration and automatic testing method of optical fiber temperature distribution tester
A technology of optical fiber length and optical fiber temperature, which is applied in the field of optical fiber temperature distribution tester, can solve the problems of difficult to meet the requirements of optical fiber temperature distribution tester, low efficiency, etc.
Active Publication Date: 2019-11-15
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology
[0004] Aiming at the problem that the optical fiber length calibration of the existing optical fiber temperature distribution tester mainly relies on manual calibration, the efficiency is very low, and it is difficult to meet the needs in the production and use of the optical fiber temperature distribution tester, the present invention provides an optical fiber temperature distribution tester optical fiber Length automatic calibration and automatic test method
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[0168] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0169] combine Figure 1 to Figure 7 , an optical fiber temperature distribution tester optical fiber length automatic calibration and automatic testing method, comprising the following steps:
[0170] Step 101: start the optical fiber temperature distribution tester, and disconnect the optical fiber under test;
[0171] Step 102: Start the automatic fiber length calibration function, input the actual length FL of the fiber, the 1550nm refractive index IR_IN of the fiber, the 1550nm refractive index IR_IN can be given by the fiber manufacturer, set the anti-Stokes optical refractive index IR_AS to IR_IN, and set the Stokes The optical refractive index IR_S is IR_IN, the spatial resolution parameter SFR is set to 1m, the sampling resolution SAMF is 0.2m, the test range is set to FR=optical fiber length FL+1km, the internal ...
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The invention discloses an optical fiber length automatic calibration and automatic testing method of an optical fiber temperature distribution tester. The optical fiber length calibration of the existing optical fiber temperature distribution tester mainly depends on artificial calibration, and the calibration effect can be affected since multiple subjective elements are existent in artificial analysis, and the demands in the production and use process of the optical fiber temperature distribution tester are hard to satisfy since the artificial calibration efficiency is extremely low. The multi-downsampling composite data length analysis method based on Stokes and anti-Stokes data can perform deep analysis on the Stokes and anti-Stokes data in the optical fiber temperature distribution tester system, the identification computation on the Stokes curve and anti-Stokes curve optical fiber tail end can be realized, and the analysis on the accessed optical fiber length of the optical fibertemperature distribution tester can be realized based on the identification computation. The automatic testing method disclosed by the invention is saved in manpower cost, high in calibration precision, high in calibration efficiency, free from hardware changing and hardware cost increasing.
Description
technical field [0001] The invention relates to the field of optical fiber temperature distribution testers, in particular to an automatic calibration of optical fiber length and an automatic test method for the optical fiber temperature distribution tester. Background technique [0002] Optical fiber temperature distribution tester (also known as Raman optical time domain reflectometer, referred to as ROTDR) has been widely used in Temperature monitoring of power cables, temperature monitoring of intelligent pipe racks, temperature monitoring of oil transportation and storage facilities, and fire warning, etc., but in the development, production and use of ROTDR, whether the positioning of temperature detection and fire warning is accurate depends heavily on Accurate calculation and calibration of fiber length. [0003] At present, the calibration of ROTDR fiber length mainly depends on manual calibration. By manually analyzing the fiber temperature curve, Stokes curve or ...
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IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 袁明张洋闫继送徐瑞龚侃郭洪龙李鹏徐玉华张志辉毕宗义
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP