Aircraft skin structure monitoring method based on wireless machine vision

Abstract

The invention, which belongs to the aircraft skin structure health monitoring field, discloses an aircraft skin structure monitoring method based on wireless machine vision. In the method, a wall-climbing robot, which is equipped with an image acquisition apparatus, is used to move on an aircraft skin surface so as to real-timely collect skin image information; the skin image information is sent to a PC machine in a work station through wireless communication; the PC machine carries out image preprocessing, image feature extraction, classification and identification to the image information and finally gives a skin damage diagnosis and decision according to an identification result. By using the method of the invention, an untethered operation of the aircraft skin structure monitoring can be realized, simultaneously continuity of the monitoring can be guaranteed and accuracy and working efficiency of the monitoring can be raised.

Description

technical field [0001] The invention relates to a monitoring method, in particular to an aircraft skin structure monitoring method based on wireless machine vision, and belongs to the field of aircraft skin structure health monitoring. Background technique [0002] In 1988, the fuselage skin damage accident on the Boeing 737 aircraft of Aloha Airlines led to the in-depth research on aging aircraft in the world, and successively put forward the requirements for corrosion prevention and control programs, as well as measures to prevent widespread fatigue damage. Therefore, In the civil aviation system, the research on the detection technology of structural defects of aging aircraft has been paid more and more attention by the aviation organizations of various countries. [0003] Aircraft non-destructive testing technology is mainly aimed at aircraft structural damage, which can be roughly divided into the following five types: ①Defects in the manufacturing process of aircraft s...

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Problems solved by technology

[0004] At present, the aircraft skin inspection is mainly based on manual inspection, and the manual non-destructive inspection method is adopted. The quality of non-destructive inspection of aircraft maintenance depends to a large extent on the actual operation of the inspectors. This method has the disadvantages of high labor intensity, long inspection cycle, and leakage high detection rate

In recent years, the aircraft fatigue detection technology has become more and more mature. Among them, the pulsed eddy current detection method overcomes the shortcomings of the traditional eddy current detection method, such as slow speed and the need for professional inspectors to manually adjust the frequency parameters. However, the visibility of the results is poor and requires professional operation. A large number of cables are laid for power supply and data communication, which increases the complexity of the detection system. At the same time, due to the complex shape, size and surface condition of the aircraft structure and components, and most of the inspections in aircraft maintenance are local key inspections, Therefore automatic or semi-automatic detection devices cannot be used

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