Method for remotely monitoring damage of interlayer structure of wind power blade

Abstract

A method for remotely monitoring damage of the interlayer structure of a wind power blade is used for monitoring the damage position and the damage degree of the interlayer structure of the wind power blade. According to the method, a carbon fiber intelligence layer (6) is laid on a beam cap (2) below one outer skin of the wind power blade (1) and a rear edge beam below another outer skin of the wind power blade (1) based on the functional characteristics of the carbon fiber intelligence layer (6) and the special shape following performance of composite materials, a sensitivity field is established between the carbon fiber intelligence layer (6) and the structure to be monitored, the carbon fiber intelligence layer (6) converts a force field of the structure to be monitored into an electric field easy to detect, the conditions of stress and strain of the structure to be monitored can be known through an ERT tomography system (10) according to resistivity distribution of the electric field, and then the damage position and the damage degree of the structure to be monitored can be judged. By means of the method, the use process of the wind power blade (1) can be remotely monitored in real time without disassembly of the blade or a halt which influences normal operation of a wind power generator, and the condition of crack growth in the structure of the wind power blade (1) can be known in real time so as to give an alarm in time.

Description

Technical field [0001] The invention belongs to the technical field of structural non-destructive testing, and mainly relates to a method for remotely monitoring structural damage between layers of wind power blades. Background technique [0002] As we all know, the main methods used for non-destructive testing of product structural parts so far are ultrasonic non-destructive testing, X-ray machines, gamma ray machines, magnetic particle flaw detectors, etc. There is also a method of implanting sensing materials inside the structure on the surface of the product. And the internal structure is tested. However, for large-scale composite products such as wind power blades, among the above-mentioned detection methods, only the ultrasonic nondestructive testing method is suitable for the detection of wind power blades. The portable ultrasonic fast scanner is used for testing, but there is a prerequisite that the wind power blades are not installed. Before going on the wind turbine. ...

AI Technical Summary

Problems solved by technology

At the same time, because the wind turbine nacelle is extremely far from the ground, depending on the length of the blades, the distance varies from 80 meters to 200 meters, and special equipment must be used for installation. Therefore, the installation cost of wind turbine blades is extremely high. Real-time monitoring during operation, that is, a technology for remote monitoring of damage between blade layers is required to achieve

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