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Broken yarn detection method based on video signal processing

A detection method and yarn breakage detection technology, which is applied in textiles, textiles, papermaking, looms, etc., and can solve problems such as false detection and detector influence

Inactive Publication Date: 2013-01-09
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

This type of detector is easily affected by the harsh working conditions of the textile factory (such as vibration, dust, etc.), and generally only detects one point, which is likely to cause false detection

Method used

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  • Broken yarn detection method based on video signal processing

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Embodiment Construction

[0007] The gauze woven by the textile machine is generally a solid color (such as white). If there is no broken yarn, the gray value of the entire image collected by the camera is consistent. Once there is a broken yarn (usually a thread broken in the vertical direction), a certain The gray value of the image along the vertical axis is abnormal. This patent realizes broken yarn detection based on this principle.

[0008] Since the broken yarn detection has high requirements on real-time performance, and the loom will rotate when it is working, it is necessary to use a high-speed camera for image acquisition, otherwise it will easily cause ghosting and false detection. In order not to miss detection, the system must have high-speed data processing capabilities. Therefore, high-speed A / D converters are used to sample and analog-to-digital convert image signals, and FPGAs with fast running speed and strong parallel processing capabilities are used to directly process image in...

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Abstract

The invention belongs to the field of signal detection and processing in textile industry and relates to a broken yarn detection method for looms. The broken yarn detection method for looms overcomes the defects in the existing broken yarn detection, and uses area means instead of point means, so that broken yarn detection is more accurate and reliable. A system of broken yarn detection comprises a high-speed camera, a high-speed A / D (analog / digital) converter, FPGAs (field programmable logic devices), an active RFID (radio frequency identification device), a handheld terminal and the like. Pictures of gauze are captured by the high-speed camera, the high-speed A / D converter is used for sampling and analog-digital conversion for image analog signals, image data are rapidly analyzed and processed by FPGA technology, signals are output to stop a loom according to processing results, and wireless alarm signals are transmitted to the handheld terminal through the active RFID.

Description

technical field [0001] The invention relates to a detection method for yarn breakage of a loom in the textile industry. Background technique [0002] The textile industry occupies a very important position in China's national economy. As a traditional labor-intensive industry, it has played an irreplaceable supporting role in the construction of China's national economy. According to an internal document of the China National Textile and Apparel Council, in 2012, the total number of employees in China's textile industry has increased from more than 13 million in 2000 to about 20 million, and enterprises with annual sales revenue of more than 20 million yuan have reached 36,700 households. What is worrying is that this industry with a large number of employees is encountering periodic difficulties. The sharp drop in trade volume and the meager profit margins put some enterprises under enormous pressure to survive. Therefore, how to improve production efficiency and save re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D03D51/18D04B35/14
Inventor 王玉凤范必双
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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