Spatial resolution testing method and device for distributed optical fiber temperature sensing system
A distributed optical fiber and spatial resolution technology, applied in thermometer testing/calibration, measuring devices, thermometers, etc., can solve problems such as uneven distribution of optical fiber circles, high requirements for test occasions, and inconvenient test portability. Improved test efficiency and stable test results
Inactive Publication Date: 2020-04-17
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
During the measurement process, optical fibers of different lengths need to be manually wound, and there is a certain length measurement error; and the manual winding has uneven distribution of optical fiber coils, which is easy to introduce measurement errors; the method of constant temperature heating in a water tank has a large device volume, which is not convenient for field testing. The disadvantage is that each test needs to have sufficient heating water source, which has high requirements for the test occasion; and the constant temperature heating of the water tank is used, the temperature rises slowly, and the test efficiency is low.
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[0041] The present invention will be further elaborated below in conjunction with embodiment.
[0042] Such as figure 1 As shown, a distributed optical fiber temperature sensing system spatial resolution testing device includes: distributed optical fiber temperature sensing system 1 , sensing optical fiber 2 , and optical fiber heating device 3 .
[0043] The optical fiber heating device 3 heats the sensing optical fiber 2, reads the temperature information of the optical fiber under test through the distributed optical fiber temperature sensing system 1, and analyzes and calculates the temperature information with spatial resolution.
[0044] Such as figure 2 As shown, the first test method for the spatial resolution of a distributed optical fiber temperature sensing system includes the following steps:
[0045] (1) According to the theory of distributed optical fiber temperature sensing, roughly evaluate the spatial resolution of the distributed optical fiber temperature ...
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The invention relates to a spatial resolution testing device for a distributed optical fiber temperature sensing system. The system comprises a distributed optical fiber temperature sensing system, asensing optical fiber and an optical fiber heating unit, the distributed optical fiber temperature sensing system realizes distributed temperature measurement and positioning based on an inelastic scattering effect generated by light in the optical fiber and an optical time domain reflection principle, and the distributed optical fiber temperature sensing system is connected with the sensing optical fiber; the sensing optical fiber is arranged on the surface of a measured object, the optical fiber heating unit is used for heating the sensing optical fiber to enable the temperature of the sensing optical fiber to change, the distributed optical fiber temperature sensing system measures the temperature distribution of the optical fiber and obtains a temperature distribution curve, temperature information of the measured object is obtained, and therefore the resolution of the distributed optical fiber temperature sensing system is calculated. According to the invention, the spatial resolution of the distributed optical fiber temperature sensing system can be tested efficiently, accurately, quickly and conveniently.
Description
technical field [0001] The invention belongs to the technical field of optical fiber sensing, and relates to a method and device for testing the spatial resolution of a distributed optical fiber temperature sensing system. Background technique [0002] Optical fiber sensing technology has gradually become one of the most representative emerging technologies in the field of sensing due to its passive sensing medium, corrosion resistance, anti-electromagnetic interference, and long service life. Among them, distributed optical fiber sensing technology uses optical time domain reflection technology to locate the backscattered signal at any point in the optical fiber. Therefore, it has the function of measuring the distribution of physical quantities along the optical fiber. The monitoring of relevant physical quantities in the range of several kilometers or even tens of kilometers can be realized through a single optical fiber. The backscattering signal in the optical fiber ca...
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IPC IPC(8): G01K15/00G01K11/32G01K11/324
CPCG01K15/007G01K11/32G01K11/324
Inventor 李瑞艳朱晓非李娜潘亮杨潇君
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES