Wind turbine generator blade defect non-contact monitoring device and method

Abstract

The invention discloses a wind turbine generator blade defect non-contact monitoring device and additionally further discloses a corresponding method. The wind turbine generator blade defect non-contact monitoring device comprises an acoustic emission sensor, a signal processing and transmitting unit and a signal receiving terminal which are in signal connection sequentially; the acoustic emissionsensor converts pneumatic noise signals of blades of a wind turbine generator into voltage signals to be input into the signal processing and transmitting unit; the signal processing and transmittingunit extracts the signals, in a monitoring frequency band, of the voltage signals and wirelessly transmits the signals to the signal receiving terminals; and the signal receiving terminals wirelesslyreceives the signals transmitted by the signal processing and transmitting unit and conducts frequency domain converting on the signals, and accordingly monitoring information of the signals is obtained. The monitoring information in operation of the blades of the wind turbine generator can be obtained in real time, and accordingly the damage situation of the fan blades is diagnosed timely.

Description

technical field [0001] The invention relates to a wind turbine blade defect monitoring technology, in particular to a wind turbine blade defect monitoring device and method. Background technique [0002] With the increasingly serious energy crisis and environmental pollution problems, the exploration and application of new energy sources have received more and more attention from various countries. Wind energy is a green and environmentally friendly renewable resource. Under the urgent situation of the world's urgent need for new energy, vigorously developing wind power generation will inevitably become the trend and trend of future development. [0003] Blades are one of the key components of wind turbines. During the working process, they are subjected to strong wind loads, sand erosion, atmospheric oxidation, and corrosion of humid air. Pores, cracks, wear, and corrosion will inevitably occur. In addition, during the manufacturing process, typical defects such as porosit...

AI Technical Summary

Problems solved by technology

For in-service fan blades, due to the influence of on-site factors and height limitations, it is difficult to use X-ray inspection methods to achieve on-site inspection

However, the ultrasonic detection cycle is long, and probes of different specifications are required for different types of defects, and coupling agents are required during the detection process. Therefore, it is difficult for ultrasonic detection technology to achieve real-time dynamic monitoring.

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