FBG optical fiber sensing demodulation system for marine environment monitoring

A sensing solution and optical fiber technology, which is applied in the field of marine sensors and optical fiber communication, can solve problems such as large noise, and achieve the effect of improving system performance and demodulation accuracy

Active Publication Date: 2019-03-22
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

In the FBG sensing demodulation system, since the optical path and the circuit involve many hardware circuit modules, there must be a lot of noise in the demodulation process

Method used

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  • FBG optical fiber sensing demodulation system for marine environment monitoring
  • FBG optical fiber sensing demodulation system for marine environment monitoring
  • FBG optical fiber sensing demodulation system for marine environment monitoring

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Embodiment Construction

[0016] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

The invention provides an FBG optical fiber sensing demodulation system for marine environment monitoring. The system comprises a signal input source and a signal sensing module, and further comprisesa demodulation technology module and a signal processing module. The demodulation technology module is used for receiving and demodulating a reflected optical signal output by the signal sensing module, outputting a demodulated transmitted optical signal, and converting the transmitted optical signal into an electrical signal, the signal processing module collects the electrical signal output bythe demodulation technology module, and information of demodulated monitored variable is obtained through a signal processing algorithm. The system is based on a tunable optical fiber FP filter, adopts a cascade algorithm combing a peak-detection algorithm and an adaptive filtering improvement algorithm to improve the demodulation accuracy and improve the system performance in the premise of not changing hardware facilities.

Description

technical field [0001] The invention relates to the field of marine sensors and optical fiber communication, in particular to a demodulation system of an FBG optical fiber sensor used for marine environment detection. Background technique [0002] At present, the main means of ocean monitoring include satellite remote sensing, automatic monitoring of ship floating, and fixed monitoring of pile foundation platforms. These are inseparable from ocean sensor technology. Traditional physical sensors have poor stability and high cost in ocean monitoring. Based on the transmission of electrical signals, the structure is usually large and not durable, and it is difficult to embed the structure for measuring internal characteristics, and this type of sensor is a local (or point) sensor, which is limited to only measure a parameter at the current position and cannot be easily reused . In addition, long-term online early warning cannot be realized, which can no longer meet the needs o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/353
Inventor 汪洋丁丽琴胡子祥刘露平瞿侬
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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