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Distributed type optical fiber temperature sensing system and method for automatically acquiring calibrated parameter

A distributed optical fiber and sensing system technology, applied in thermometers, thermometer testing/calibration, thermometers with physical/chemical changes, etc., can solve problems such as inconvenient use, improve stability, improve system errors, and reduce calibration The effect of the maintenance work

Inactive Publication Date: 2018-11-02
ZHUHAI XIMO ELECTRIC TECH
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  • Description
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Problems solved by technology

Therefore, the equipment needs regular maintenance, which is very inconvenient to use

Method used

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  • Distributed type optical fiber temperature sensing system and method for automatically acquiring calibrated parameter
  • Distributed type optical fiber temperature sensing system and method for automatically acquiring calibrated parameter
  • Distributed type optical fiber temperature sensing system and method for automatically acquiring calibrated parameter

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] In the embodiment of the distributed optical fiber temperature sensing system and the method for automatically obtaining the calibrated parameters of the present invention, the structural diagram of the distributed optical fiber temperature sensing system is as follows figure 2 shown. figure 2 Among them, the distributed optical fiber temperature sensing system includes a temperature demodulation device 1, a temperature measurement master 2 and a sens...

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Abstract

The invention discloses a distributed type optical fiber temperature sensing system and a method for automatically acquiring calibrated parameters. The system comprises a temperature demodulating device, a temperature measuring host, and a sensing optical fiber. The temperature demodulating device comprises a computer and a synchronous control unit. The temperature measuring host comprises a lasergenerator, a dense wavelength division multiplexing system, a first avalanche photodiode and a second avalanche photodiode, a first amplifier, a second amplifier, a double-channel data acquisition card, a first constant-temperature groove and a second constant-temperature groove. The dense wavelength division multiplexing system is respectively connected with the laser generator, the first avalanche photodiode, the second avalanche photodiode and the first constant-temperature groove. The second constant-temperature groove is respectively connected with the first constant-temperature groove and the sensing optical fiber, and a certain temperature difference exists between the first constant-temperature groove and the second constant-temperature groove. The invention is advantageous in that the system error caused by light attenuation of the laser generator can be effectively improved, the stability is improved, and the maintenance work that the system needs to be calibrated periodically is reduced.

Description

technical field [0001] The invention relates to the field of optical fiber temperature sensing systems, in particular to a distributed optical fiber temperature sensing system and a method for automatically acquiring calibrated parameters. Background technique [0002] Distributed optical fiber temperature sensing uses the entire transmission optical fiber as a sensor, and every point on the optical fiber (optical cable) has both "transmission" and "sensing" functions. In the distributed optical fiber temperature sensing system, when a strong pulsed laser signal is transmitted in the optical fiber (optical cable), every point in the optical fiber will produce extremely weak backscattering of the laser signal, and the Raman scattering signal The intensity is correlated with the temperature at the location of the point. By detecting the light intensity of the scattered light signal at each point, the temperature information of the point is obtained, and then the temperature di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K15/00
CPCG01K11/32G01K15/005G01K11/324
Inventor 傅翔郑克林高伟能
Owner ZHUHAI XIMO ELECTRIC TECH
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