Wind-generator blade defect damage inspection method and inspection system based on unmanned helicopter

Abstract

The invention discloses a wind-generator blade defect damage inspection method and an inspection system based on an unmanned helicopter. According to the method and the system, acquisition apparatuses for light, heat and sound signals are arranged on a small-size unmanned helicopter, the unmanned helicopter is controlled to approach a blade on a wind turbine tower in a wind farm for acquiring the light, heat and sound signals of the blade and recording or sending back the signals, so that a ground worker can analyze the blade state and timely discover blade damages and defects and adopts corresponding measures, and thus the operation reliability of blades is improved, and major accidents such as fracture and falling off of a blade and the like are prevented from generating. The inspection system comprises the small-size unmanned helicopter, a controller, a minitype visible-light image gatherer, a minitype thermal infrared imager, a sound sensor, a distance sensor, a signal emission device and a signal reception and processing device. The inspection system is capable of acquiring the light, heat and sound signals of blades in a close range, is accurate and reliable in information, convenient to operate and short in inspection time.

Description

technical field [0001] The invention relates to a state inspection technology of a wind power generator blade, in particular to a short-distance inspection of a blade in a tower state, and belongs to the field of wind power generation safety assurance. Background technique [0002] Wind turbine blades (hereinafter referred to as "blades") are important components in wind power systems that convert wind energy into electrical energy. The blades are installed on the wind power tower and rotate around the axis under the wind force to drive the generator to generate electricity. With the development of wind energy development, the large-scale characteristics of wind turbines are becoming more and more obvious, the wind power towers are getting higher and higher, and the blades are getting larger and larger. The height of the tower makes it more difficult to climb and inspect the hanger. The increase in size increases the area where the blades are affected by wind, sand, freezin...

AI Technical Summary

Problems solved by technology

Low temperature, freezing rain, etc. will cause the surface of the blade to freeze, and the ice will affect the normal operation of the fan

[0004] The blades run on the top of the wind power tower, and maintenance personnel are not easy to access. The daily inspection is mainly based on long-distance (80-100 meters) observation on the ground. Among the common damages of the above-mentioned blades, early trachoma, erosion, horizontal stripes, longitudinal cracking, debonding, etc. Both are small, and it is difficult to detect from a long-distance observation on the ground; although the icing on the surface is relatively large in size, it is colorless and transparent, and it is difficult to detect from a long-distance observation on the ground

Close observation can be carried out by climbing, hangers, etc., but it takes a long time and it is difficult to implement high-density inspections, making it difficult to find many defects or damages in the early stage, leaving a large safety hazard for the operation of wind turbines

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