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Online detection device and detection method for knitting needles of knitting machine

A detection device and technology for knitting machines, applied in the field of knitting machines, can solve the problems of frequent shutdown, reduced accuracy, inability to identify defects in fabrics, etc., and achieve the effects of improving efficiency, reducing reject rate, and improving measurement sensitivity

Active Publication Date: 2013-12-25
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the light transmittance of the fabric will change due to the change of the fabric structure, fabric color and process conditions, thereby reducing the accuracy, and often causing frequent shutdowns due to misjudgment
The disadvantage of this method is that the yarn vibration will also occur due to yarn breakage or other external factors (such as uneven dial speed), which will cause misjudgment; In case of defects

Method used

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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  • Online detection device and detection method for knitting needles of knitting machine
  • Online detection device and detection method for knitting needles of knitting machine
  • Online detection device and detection method for knitting needles of knitting machine

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited thereby.

[0041] see first figure 1 , figure 1 It is a structural block diagram of the knitting needle online detection device of the present invention. Depend on figure 1It can be seen that the knitting needle online detection device of the knitting machine of the present invention is mainly composed of a photoelectric sensing unit 1, a modulation and demodulation unit 2, a comparator 3, a microcomputer control unit 4 and a position sensor 5;

[0042] The photoelectric sensing unit 1 includes a light emitting path and a light receiving path, and the light emitting path is composed of a light emitting light source 11 and a cylindrical focusing mirror 12; the light emitted by the light emitting light source 11 is focused on the knitting needle head 6 through the cylindrical focusing...

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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Abstract

The invention relates to an online detection device and detection method for knitting needles of a knitting machine. The device comprises a photoelectric sensing unit, a modulation-demodulation unit, a comparator, a microcomputer control unit and a position sensor. Damaged knitting needles including broken needles and crooked needles can be accurately detected, the knitting needles can be encoded, and the relative positions of the damaged knitting needles are positioned, so that the damaged knitting needles are conveniently and timely replaced by operators. The device has the advantages of long working distance, small size, low cost, high detection sensitivity, fine real-time performance and the like.

Description

technical field [0001] The invention relates to a knitting machine, in particular to an online detection device and a detection method for knitting needles of a knitting machine. Background technique [0002] At present, during the working process of the knitting machine, the knitting needles are often damaged, such as broken needles (needle breakage) or crooked needles (lateral bending), which will cause defects on the fabric and cause fabric waste. Therefore, for knitting needles It is very necessary to detect whether it is damaged. [0003] In the prior art 1 "Automatic Detection Device for Knitting Machine Fabric Defects" (Chinese Patent No. 90212451.X, inventor Xu Yisun), it is based on the fact that when a fabric has a defect, its light transmittance will undergo a large mutation and is designed by a comparative formula. A defect automatic detection device composed of a photoelectric sensing system and a differential operational amplifier control circuit system. In t...

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): D04B35/18
Inventor 廖小情刘鹭朱永康赵永凯黄立华郭凯黄惠杰
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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