Real-time online detection method of tension of multiple fibers in composite preform weaving process

Abstract

The invention relates to a real-time online detection method of tension of multiple fibers in a composite weaving process and belongs to the crossing field of composite, mechanical weaving and computer technologies. The method comprises the steps that an industrial CCD camera is adopted to automatically collect a grayscale image of the multiple fibers in the weaving process, median filtering processing is performed on the grayscale image, a threshold-added Canny operator edge extraction algorithm is adopted to extract an edge line between each fiber and a background in the image, a B-spline curve is utilized to automatically search for the edge line of every single fiber, and the real-time tension of the fibers is calculated through a formula. Through the real-time online detection method of the tension of the multiple fibers in the composite preform weaving process, the automatic degree is high, and real-time online detection of the tension of the multiple beams can be realized. Compared with a traditional tension detection method, detection cost of tension values of the multiple fibers can be effectively lowered, and equipment control difficulty is lowered; and meanwhile, compared with contact measurement, wearing caused by friction of the fibers can be avoided.

Description

technical field [0001] The invention relates to a method for detecting tension during the weaving process of a composite material prefabricated body, and belongs to the cross technical field of composite materials, mechanical weaving and computer technology. Background technique [0002] Advanced composite materials represented by continuous fiber reinforced composite materials have much higher specific stiffness and specific strength than steel materials. In addition, they also have the advantages of corrosion resistance, fatigue resistance and strong designability. They are widely used in launch vehicles, Satellite, wind power, rail transit and other industrial fields. For a long time, two-dimensional structural composite materials have been one of the most widely used structures in composite material structures due to their simple fabrication, mature forming technology and equipment. [0003] Three-dimensional structural composite materials introduce reinforcements in th...

AI Technical Summary

Problems solved by technology

The existing three-dimensional structure composite material preparation process is relatively cumbersome, the weaving cycle is long, and there are many manual interventions, resulting in unstable forming performance of the composite material; immature

[0004] In recent years, researchers have conducted a lot of research on tension detection methods, but most of them use tension sensors and only detect the tension of a single fiber.

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