Wind power generation monitoring system based on distributed vibration optical fibers

Abstract

The invention relates to a distributed vibration optical fiber-based wind power generation monitoring system, which is characterized in that an optical fiber is arranged in a fan blade in a production link, and adopts the following method: (1) an optical fiber signal is converted into a vibration signal through a photoelectric conversion part, and the detection length of the optical fiber is obtained through the vibration signal; (2) the broken fiber judgment module judges whether fiber relaying occurs or not according to the vibration signal; (3) carrying out feature extraction on the vibration signal, and meanwhile, carrying out further sound restoration to obtain environmental sound information features; the vibration energy features and the environment sound information features are subjected to feature training through a decision tree forest according to application requirements, and effective features are stored in a historical feature library; and (4) performing state judgment and output by performing a feature matching algorithm on the historical feature library in the operation process, and performing reminding when detecting that the state is abnormal. The occurrence of fiber breakage is detected according to the change of the length of the optical fiber, and the problem of intelligent monitoring of the conditions of delamination, cracks, abrasion and the like of the fan blade is solved.

Description

technical field [0001] The invention belongs to the technical field of wind power equipment monitoring, and in particular relates to a wind power generation monitoring system based on distributed vibration optical fibers. Background technique [0002] With the popularization of new energy, more and more green energy has entered everyone's field of vision, especially now that "carbon peaking, carbon neutrality" is proposed, and the demand for small and medium-sized green energy applications is further expanding. Green energy with the same status as solar energy is generally used as a national project, and the requirement is to be in an open and windy environment. However, the vertical axis wind turbine developed by us has greatly broadened its application scenarios and can be widely used in In urban areas, villages and other environments, frequent applications will easily cause delamination, cracks, wear, etc. of fan blades. If not found in time, it will easily develop into m...

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Problems solved by technology

[0002] With the popularization of new energy, more and more green energy has entered everyone's field of vision, especially now that "carbon peaking, carbon neutrality" is proposed, and the demand for small and medium-sized green energy applications is further expanding. Green energy with the same status as solar energy is generally used as a national project, and the requirement is to be in an open and windy environment. However, the vertical axis wind turbine developed by us has greatly broadened its application scenarios and can be widely used in In urban areas, villages and other environments, frequent applications will easily cause delamination, cracks, wear, etc. of fan blades. If not found in time, it will easily develop into mechanical failures and cause serious accidents and economic losses. Traditional mechanical condition monitoring sensors cannot meet existing needs

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