Modular distributed optical fiber sensing device

Abstract

The invention discloses a modular distributed optical fiber sensing device which comprises a machine case, a modulation module, a photoelectric module, a signal collecting and processing module and a controller module. The modulation module, the photoelectric module, the signal collecting and processing module and the controller module are all matched with the type of a slot of the machine case, an embedded controller is adopted in the controller module, the modulation module generates electric pulses to drive a modulator in the photoelectric module to generate optical pulses, the optical pulses are output out of an optical interface of the photoelectric module, meanwhile, optical signals returned by measured optical fibers are received and are converted into electric signals by a photoelectric detector, the signal collecting and processing module collects and processes the electric signals transmitted by the photoelectric module, and a measuring result is transmitted to the controller module to be stored and displayed. The integrated, standardized and modularized production of the distributed optical fiber sensing device can be pushed, and therefore the flexibility and universality of the device are improved, and the cost of the sensing device is greatly lowered.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a distributed optical fiber sensing device for optical fiber line characterization, event identification and fault location. Background technique [0002] Since optical fiber can also be used as a communication and sensing medium, its passive, anti-electromagnetic interference, corrosion resistance, high temperature resistance and other characteristics determine its great potential in the development of smart grids. Mature optical fiber sensing technology and equipment have been applied in the electric power industry, such as Raman optical time domain reflectometer for transformer temperature monitoring, Brillouin optical time domain reflectometer for submarine cable temperature / stress monitoring, Brillouin optical time domain reflectometer for submarine cable temperature / stress monitoring, Yuanguang time-domain analyzer is used for icing monitoring of transmission lines, ap...

AI Technical Summary

Problems solved by technology

[0003] At present, the flexibility and versatility of distributed optical fiber sensing devices are poor, and there is no uniform standard for system structure design, such as Raman optical time domain reflectometer, Brillouin optical time domain reflectometer, phase optical time domain reflectometer, Devices such as Brillouin optical time domain analyzer and polarized optical time domain reflectometer are very similar in hardware structure and some functions, but lack of unified and standard functional module division, so it is difficult to realize the multiplexing of various sensing functions and integration, so it is difficult to reduce the cost of distributed optical fiber sensing devices in practical engineering applications

In terms of research on distributed optical fiber sensing devices at home and abroad, the main focus is on the overall performance of the device, such as: the patent "distributed optical fiber sensor" (application number: 200980147933.0) and "distributed optical fiber sensor" (application No.: 200480043385.4), the patent "distributed optical fiber vibration sensor" (application number: 201110008557.6) applied by the Shanghai Institute of Precision Mechanics and Optics, Chinese Academy of Sciences and the patent "distributed optical fiber temperature sensing system" applied by Shanghai Huawei Optical Fiber Sensing Technology Co., Ltd. "Optoelectronic Device" (application number: 200910055922.1), etc., and in terms of commercial distributed optical fiber sensing devices, there are no products designed and assembled according to functional modules on the market

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