Knitting needle screening device and knitting needle screening method for large circular knitting machine
A large circular knitting machine and knitting needle technology, applied in the field of knitting machines, can solve the problems of electrical signal waveform differences, reduce production efficiency, and easily cause false alarms, etc., and achieve the effect of eliminating different reflectivity and good real-time performance
Active Publication Date: 2016-08-24
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
During the fast operation of the knitting machine, the reflectivity of each knitting needle is different, and there are subtle differences in the reflection end surface of the needle, which leads to a large difference in the waveform of the electrical signal corresponding to each knitting needle
When detecting broken needles and crooked needles, all knitting needles use the same threshold to judge, which is likely to cause false alarms and reduce production efficiency
Method used
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[0028] The device for discriminating knitting needles of a large circular knitting machine proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that all the drawings are in very simplified form, and are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.
[0029] The present invention provides a knitting needle identification device and a knitting needle identification method of a large circular knitting machine. The device and method are applied to the identification of knitting needle signals in the detection process of large circular knitting machine needles to identify abnormal needles such as broken needles and crooked needles. It has the characteristics of good real-time performance and no false alarm rate.
[0030] Please refer to figure 1 The circular knitting needle identification device...
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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The invention discloses a knitting needle distinguishing device and method for a circular knitting machine. The knitting needle distinguishing device comprises a control processing unit, a period ratio calculation unit, a duty ratio calculation unit, a threshold processing unit and an abnormal needle distinguishing unit. The signal feature of each knitting needle is extracted, a broken needle threshold value and an oblique needle threshold value corresponding to each knitting needle are calculated out, the threshold values are used for distinguishing whether abnormal knitting needles such as broken needles and laterally bent needles exist in the turnover process of the circular knitting machine or not, and the serial numbers of the abnormal knitting needles are output. The abnormal knitting needles such as broken needles and oblique needles can be distinguished out for the circular knitting machine, and the knitting needle distinguishing device and method have the advantages of being good in real-time performance and free of false alarm rate.
Description
technical field [0001] The invention relates to the technical field of knitting machines, in particular to a circular knitting needle identification device and a knitting needle identification method used in the detection process of large circular knitting machine needles. Background technique [0002] When the circular knitting machine works for a long time, the needles of the knitting needles tend to break or bend sideways, resulting in broken or crooked needles, which will lead to continuous defects on the fabric and result in fabric waste. Therefore, if abnormal needles (including broken needles and crooked needles) can be detected in time, such losses can be effectively avoided. [0003] In the prior art, the most practical detection technology for knitting machine broken needles is the reflective intensity modulation optical fiber sensor detection technology. The electrical signal is converted into an electrical signal, and the broken needle detection is realized afte...
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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IPC IPC(8): D04B35/18
Inventor 廖小情郭凯黄立华黄惠杰
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI