Method and system for identifying gas film hole penetration area by using high-speed camera, and medium

Abstract

The embodiment of the invention discloses a method and system for identifying a gas film hole penetration area by using a high-speed camera, and a medium. The method comprises the following steps of dividing an air film hole into a plurality of detection areas according to a set acquisition sequence by utilizing a to-be-processed image acquired by a high-speed camera in a laser processing process of the air film hole; obtaining target detection areas where bright spots in a real-time acquired image are located in all the detection areas; determining a gray value change trend of the target monitoring areas according to the gray value of the target detection areas; and determining that the target detection areas of the gas film hole are penetrated in response to the fact that the gray value change trend of the target monitoring areas conforms to a set criterion.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of laser processing, and in particular, to a method, system and medium for identifying a gas film hole penetration area by using a high-speed camera. Background technique [0002] Laser beam machining (LBM, Laser Beam Machining) technology is the most common processing technology in laser applications, and has been widely used in important national economic fields such as microelectronics, automobiles, aerospace, and machinery manufacturing. Laser processing technology includes laser cutting, laser welding, laser drilling and micromachining. [0003] At present, the cooling technology of aero-engine turbine blades uses external film cooling technology. External film cooling technology is to use laser processing technology to process one row or several rows of tiny holes on the wall of the turbine blade. The cold air released inside the turbine blade flows out through the tiny holes to ...

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Problems solved by technology

However, the related technology has the following defects: First, the human eye can visually distinguish pictures at a limit of 30 frames per second, and what is collected by an industrial CCD camera is a continuous video, and the accuracy of the turbine blade penetration area cannot be accurately determined by human eyes. Second, the structure of the cavity of the turbine blade is complex, and there will be problems such as insufficient filling or cleaning of the filling material after processing; then, the sealed cavity of the turbine blade with a small wall-to-wall distance cannot be filled with protective materials

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