Nut looseness detection method for wind power tower drum

Abstract

The invention relates to a nut looseness detection method for a wind power tower drum. The nut looseness detection method includes: drawing a mark on the nut by using a fluorescent material; collecting an initial nut image and a current nut image through a visual sensor; converting the collected original image and the current image into an HSV color space from an RGB color space, converting the image into a binary image through a set threshold value, highlighting the drawn mark, subtracting the binary image of the original image from the binary image of the current image, comparing the position changes of the marks on the two binary images, and judging whether the nut is loosened or not. Compared with the prior art, the method has the advantages that whether the nut in the fan tower is loosened or not can be automatically detected and judged, the interference of background noise generated by factors such as dim light, narrow space and many obstacles inside the fan tower drum on a shotimage is effectively solved, good visual characteristics are provided for a computer to acquire and analyze pictures and judge nut looseness, judgment errors are effectively reduced, and good guarantee is provided for tower drum safety.

Description

technical field [0001] The invention relates to the field of inspection of wind turbines, in particular to a method for detecting loose nuts of wind power towers. Background technique [0002] The wind farm lines and wind turbines are widely distributed in many areas, the terrain is complex, and the natural environment is harsh. They are often damaged by the natural environment to varying degrees. The inspection of wind turbines and transmission lines is an indispensable task. At present, the main method of wind turbine inspection is manual line inspection. Inspection personnel use binoculars to observe the blades, towers, wires, etc. under the wind turbine. This method is labor-intensive, inefficient, and expensive. The most cumbersome thing in the fan inspection work is the loose identification of the nut at a specific position of the fan unit. The traditional manual inspection method is time-consuming and laborious, and the efficiency is not high. [0003] The tradition...

AI Technical Summary

Problems solved by technology

Observation marks generally use manual direct on-site judgments and remote shooting judgments through camera equipment, which requires time and energy for inspection personnel, and may cause misjudgments

At the same time, because the scene inside the wind turbine is dark and the structure is complex, it further increases the difficulty of judgment

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