CN103789922B - The detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part - Google Patents
The detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part Download PDFInfo
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- CN103789922B CN103789922B CN201410064199.4A CN201410064199A CN103789922B CN 103789922 B CN103789922 B CN 103789922B CN 201410064199 A CN201410064199 A CN 201410064199A CN 103789922 B CN103789922 B CN 103789922B
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- crochet hook
- length
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Abstract
The present invention relates to knitting machine field, in particular to the detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part. The method, comprising: the real-time imaging that obtains described crochet hook part; From the real-time imaging of described crochet hook part, extract the shape information of described crochet hook part; The shape information of the complete crochet hook part extracting by the shape information of described crochet hook part and in the image of the complete crochet hook part that obtains and preserve in advance compares, and obtains the similarity of shape information; Determine that according to the similarity of described shape information whether described crochet hook part is complete. The detection method of crochet hook part provided by the invention, checkout gear and the knitting machine of crochet hook part, can not make the post-rift crochet hook part of part work on, and causes knitting machine to produce defect ware or waste product, and the operating efficiency of knitting machine is higher.
Description
Technical field
The present invention relates to knitting machine field, in particular to the detection method of crochet hook part,The checkout gear of crochet hook part and knitting machine.
Background technology
Knitting machine contains multiple weaving crochet hook parts, when knitting machine is in the time working long hours, and hookPin part easily ruptures, if find not in time and solve, can produce nonconformingSubstandard products.
In correlation technique, the detection method of crochet hook part is by add a light in the front of crochet hook partWhether fine device, detect crochet hook part by light reflection principle and rupture, traditional fiber deviceSensor have good positioning, when weaving crochet hook part rotates in light area, if crochet hook partFracture, does not have light and reflects back, and reflects back if unglazed, shows the fracture of crochet hook part.
But the crochet hook part of knitting machine is in real work, crochet hook part is likely that part is disconnectedSplit, so still have light transmitting and go back, so can produce erroneous judgement, make part post-riftCrochet hook part works on, and causes knitting machine to produce defect ware or waste product, the work of knitting machineEfficiency is lower.
Summary of the invention
The object of the present invention is to provide the detection method of crochet hook part, the checkout gear of crochet hook partAnd knitting machine, to solve the above problems.
The detection method that crochet hook part is provided in an embodiment of the present invention, comprising: obtain instituteState the real-time imaging of crochet hook part;
From the real-time imaging of described crochet hook part, extract the shape information of described crochet hook part;
By the shape information of described crochet hook part and the complete crochet hook part that obtains and preserve in advanceThe shape information of the complete crochet hook part extracting in image compares, and obtains the phase of shape informationLike degree;
Determine that according to the similarity of described shape information whether described crochet hook part is complete.
Preferably, in the detection method of above-mentioned crochet hook part, according to described shape informationSimilarity determine that whether described crochet hook part complete after, also comprise: if described shape informationSimilarity be less than default similarity threshold, send shut down and/or alarm command.
Preferably, in the detection method of above-mentioned crochet hook part, described crochet hook part comprises: pinTip, top and shank;
The described shape information that extracts described crochet hook part from the real-time imaging of described crochet hook part,Comprise:
From the real-time imaging of described crochet hook part, extract described needle tip real time length information,The real time length information at described top and the real time length information of described shank.
Preferably, in the detection method of above-mentioned crochet hook part, described by described crochet hook partThe complete hook extracting in the image of shape information and the complete crochet hook part that obtains and preserve in advanceThe shape information of pin part compares, and obtains the similarity of shape information, comprising:
By the length of the needle tip of the real time length information of described needle tip and described complete crochet hook partDegree information compares, and obtains the similarity of the length of needle tip;
By the length at the top of the length information at the top of described crochet hook part and described complete crochet hook partDegree information compares, and obtains the similarity of the length at top;
By the length of the shank of the length information of the shank of described crochet hook part and described complete crochet hook partDegree information compares, and obtains the similarity of the length of shank.
Preferably, in the detection method of above-mentioned crochet hook part, described according to described form letterThe similarity of breath determines that whether described crochet hook part is complete, comprising:
If the similarity of the length of described needle tip is greater than default threshold value, determine described hookPin part is complete;
If the similarity of the length of described needle tip is less than described default threshold value and described topThe similarity of length be greater than described default threshold value, determine the needle tip of described crochet hook partFracture;
If the similarity of the length of described needle tip is less than described default threshold value, described topThe similarity of length be less than described default threshold value, and the length of described shank is similarDegree is greater than described default threshold value, determines the top fracture of described crochet hook part;
If the similarity of the length of described needle tip is less than described default threshold value, described topThe similarity of length to be less than the similarity of length of described default threshold value, described shank littleIn described default threshold value, determine the shank fracture of described crochet hook part.
The checkout gear that crochet hook part is also provided in an embodiment of the present invention, comprising: camera,Image processor;
Described camera obtains the real-time imaging of described crochet hook part and sends it to described image placeReason device;
Described image processor extracts described crochet hook part from the real-time imaging of described crochet hook partShape information, by the shape information of described crochet hook part and the complete hook that obtains and preserve in advanceThe shape information of the complete crochet hook part extracting in the image of pin part compares, and obtains form letterThe similarity of breath, and determine that according to the similarity of shape information whether described crochet hook part is complete.
Preferably, in the checkout gear of above-mentioned crochet hook part, also comprise: controller, instituteState controller obtains the shape information of described crochet hook part similarity from described image processor,If the similarity of described shape information is less than default similarity threshold, to described crochet hook partThe control system of the knitting machine at place sends shuts down and/or alarm command.
Preferably, in the checkout gear of above-mentioned crochet hook part, described image processor comprises:Shape information extraction unit and shape information comparing unit;
Described shape information extraction unit extracts described hook from the real-time imaging of described crochet hook partThe shape information of pin part sends to described shape information comparing unit;
Described shape information comparing unit receives the shape information of described crochet hook part, and described in inciting somebody to actionIn the image of the shape information of crochet hook part and the complete crochet hook part that obtains and preserve in advance, extractThe shape information of complete crochet hook part compare, true according to the similarity of described shape informationWhether fixed described crochet hook part is complete.
Preferably, in the checkout gear of above-mentioned crochet hook part, described shape information extracts singleUnit comprises: length extraction unit;
Described shape information comparing unit comprises: length comparing unit;
Described length extraction unit extracts described crochet hook part from the real-time imaging of described crochet hook partLength information, the length information of needle tip and the length information of shank at top send to instituteState length comparing unit;
Described length comparing unit receives length information, the needle tip at the top of described crochet hook partLength information and the length information of shank, and by the length information at the top of described crochet hook part,The length information of needle tip and the length information of shank and the complete hook that obtains and preserve in advanceThe length information at the top of the complete crochet hook part extracting in the image of pin part, the length of needle tipThe length information of information and shank compares, and determines described crochet hook part according to result relativelyWhether complete.
Knitting machine is also provided in an embodiment of the present invention, has comprised for controlling crochet hook part fortuneThe control system of row, also comprises the checkout gear of the crochet hook part as described in above-described embodiment.
The detection method of the crochet hook part that the embodiment of the present invention provides, the checkout gear of crochet hook part andKnitting machine, it is by obtaining the real-time imaging of crochet hook part, and from the real-time imaging of crochet hook partExtract the shape information of crochet hook part, from the shape information of crochet hook part with obtain and preserved in advanceThe shape information of the complete crochet hook part extracting in the image of whole crochet hook part compares, and obtainsThe similarity of shape information; Determine that according to the similarity of shape information whether crochet hook part is complete.In the time that crochet hook part part ruptures, the form of the crochet hook part extracting from the real-time imaging of crochet hook partInformation is different from the shape information of complete crochet hook part, therefore can not produce erroneous judgement, can not make portionDivide post-rift crochet hook part to work on, cause knitting machine to produce defect ware or waste product, pinThe operating efficiency of loom is higher.
Brief description of the drawings
Fig. 1 shows the signal of a kind of embodiment of the detection method of crochet hook part of the present inventionFigure;
The structural representation of a kind of embodiment of Fig. 2 crochet hook part of the present invention.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is done further in detail below by specific embodimentDescribe.
The detection method of crochet hook part is provided in an embodiment of the present invention, as shown in Figure 1,Comprise:
S101: the real-time imaging that obtains crochet hook part;
S102: the shape information that extracts crochet hook part from the real-time imaging of crochet hook part;
S103: by the shape information of crochet hook part and the complete crochet hook part that obtains and preserve in advanceImage in the shape information of the complete crochet hook part that extracts compare, obtain shape informationSimilarity;
S104: determine that according to the similarity of shape information whether crochet hook part is complete.
Wherein, obtaining the real-time imaging of crochet hook part can be by the mode of taking pictures or to videoAutomatic or manual screenshotss obtain, in order to ensure the daylighting of real-time imaging, and can be in crochet hook part and phaseThe side setting that machine or video recorder deviate from mutually can scattering backlight or parallel backlight mendLight; The shape information of the crochet hook part that extracts from the real-time imaging of crochet hook part can be crochet hookThe length information of part, width information, shape information etc.
The detection method of the crochet hook part that the embodiment of the present invention provides, by obtaining the reality of crochet hook partTime image, and from the real-time imaging of crochet hook part, extract the shape information of crochet hook part, from crochet hookThe shape information of part with obtain and preserve in advance extract in the image of complete crochet hook part completeThe shape information of crochet hook part compares, and obtains the similarity of shape information; Believe according to formThe similarity of breath determines that whether crochet hook part is complete. In the time that crochet hook part part ruptures, from crochet hook partThe shape information of crochet hook part that extracts of real-time imaging and the shape information of complete crochet hook part notWith, therefore can not produce erroneous judgement, can not make the post-rift crochet hook part of part work on, leadCause knitting machine and produce defect ware or waste product, the operating efficiency of knitting machine is higher.
Preferably, in the detection method of above-mentioned crochet hook part, according to the phase of shape informationAfter determining that like degree whether crochet hook part is complete, also comprise: if the similarity of shape information is less thanDefault similarity threshold, sends and shuts down and/or alarm command.
By after whether definite crochet hook part is complete, if it is little to increase the similarity of shape informationIn default similarity threshold, send the action of shutdown and/or alarm command, can rapid pinWhen imperfect to crochet hook part, the similarity of shape information is less than the feelings of default similarity thresholdCondition is made the reply of shutting down or reporting to the police, and reduces the pin at the imperfect rear crochet hook part of crochet hook part placeLoom is produced the probability of defect ware or waste product.
Preferably, in the detection method of above-mentioned crochet hook part, as shown in Figure 2, crochet hook partComprise: needle tip 201, top 202 and shank 203; From the real-time imaging of crochet hook part, carryThe shape information of hook taking pin part, comprising: from the real-time imaging of crochet hook part, extract needle tipThe real time length information at real time length information, top and the real time length information of shank.
By the form letter of the further crochet hook part clearly extracting from the real-time imaging of crochet hook partBreath comprise the real time length information at real time length information, top of needle tip and shank in real timeLength information, is convenient to carry out the shape information of crochet hook part and the shape information of complete crochet hook partRelatively.
Preferably, in the detection method of above-mentioned crochet hook part, by the shape information of crochet hook partShape with the complete crochet hook part extracting in the image of the complete crochet hook part that obtains in advance and preserveState information compares, and obtains the similarity of shape information, comprising: by needle tip in real timeThe length information of the needle tip of length information and complete crochet hook part compares, and obtains needle tipThe similarity of length; By the top of the length information at the top of crochet hook part and complete crochet hook partLength information compare, obtain the similarity of the length at top; By the shank of crochet hook partLength information and the length information of the shank of complete crochet hook part compare, obtain shankThe similarity of length.
By further clearly obtaining the method for the similarity of shape information, be convenient to determine fastThe similarity of shape information, and then determine that according to the similarity of shape information crochet hook part is fastNo complete.
Preferably, in the detection method of above-mentioned crochet hook part, similar according to shape informationDegree determines that whether crochet hook part is complete, comprising: default if the similarity of the length of needle tip is greater thanThreshold value, determine crochet hook part complete; If it is default that the similarity of the length of needle tip is less thanThe similarity of the length at threshold value and top is greater than default threshold value, determines the needle point of crochet hook partPortion's fracture; If the similarity of the length of needle tip is less than the length at default threshold value, topSimilarity is less than default threshold value, and the similarity of the length of shank is greater than default threshold value,Determine the top fracture of crochet hook part; If the similarity of the length of needle tip is less than default thresholdThe similarity of length that the similarity of the length at value, top is less than default threshold value, shank is littleIn default threshold value, determine the shank fracture of crochet hook part.
By further clearly determining that according to the similarity of shape information whether crochet hook part is completeMethod, is convenient to determine that according to the similarity of shape information whether crochet hook part is complete fast.
The checkout gear that crochet hook part is also provided in an embodiment of the present invention, comprising: camera,Image processor; Camera obtains the real-time imaging of crochet hook part and sends it to image processor;Image processor extracts the shape information of crochet hook part from the real-time imaging of crochet hook part, by crochet hookThat in the image of the shape information of part and the complete crochet hook part that obtains and preserve in advance, extracts is completeThe shape information of whole crochet hook part compares, and obtains the similarity of shape information, and according to shapeThe similarity of state information determines that whether crochet hook part is complete.
The checkout gear of the crochet hook part that the embodiment of the present invention provides, obtains crochet hook part by cameraReal-time imaging, and from the real-time imaging of crochet hook part, extract crochet hook part by image processorShape information, from the shape information of crochet hook part with obtain and preserve in advance complete crochet hook partImage in the shape information of the complete crochet hook part that extracts compare, obtain shape informationSimilarity; Determine that according to the similarity of shape information whether crochet hook part is complete. When crochet hook part portionPoint when fracture, the shape information by the crochet hook part that extracts from the real-time imaging of crochet hook part withThe shape information difference of complete crochet hook part, therefore can not produce erroneous judgement, can not make part fractureAfter crochet hook part work on, cause knitting machine to produce defect ware or waste product, knitting machineOperating efficiency is higher.
Preferably, in the checkout gear of above-mentioned crochet hook part, also comprise: controller, controlDevice processed obtains the similarity of the shape information of crochet hook part from image processor, if shape informationSimilarity is less than default similarity threshold, to the control system of the knitting machine at crochet hook part placeSystem sends shuts down and/or alarm command.
By controller is set, be less than default similarity threshold according to shape information similarity,Send and shut down and/or alarm command to the control system of the knitting machine at crochet hook part place, can be quickWhen imperfect for crochet hook part, the similarity of shape information is less than default similarity thresholdSituation is made the reply of shutting down or reporting to the police, and reduces at the imperfect rear crochet hook part of crochet hook part placeKnitting machine is produced the probability of defect ware or waste product.
Preferably, in the checkout gear of above-mentioned crochet hook part, image processor comprises: shapeState information extraction unit and shape information comparing unit; Shape information extraction unit is from crochet hook partReal-time imaging in extract crochet hook part shape information send to shape information comparing unit; ShapeState information comparing unit receives the shape information of crochet hook part, and by the shape information of crochet hook part withThe form of the complete crochet hook part extracting in the image of the complete crochet hook part that obtains in advance and preserveInformation compares, and determines that according to the similarity of shape information whether crochet hook part is complete.
By being set, shape information extraction unit from the real-time imaging of crochet hook part, extracts crochet hook partShape information send to shape information comparing unit; Shape information comparing unit is set to be receivedThe shape information of crochet hook part, and by the shape information of crochet hook part with obtain and preserve in advance completeThe shape information of the complete crochet hook part extracting in the image of whole crochet hook part compares, according toThe similarity of shape information determines that whether crochet hook part is complete, can not produce erroneous judgement, can not make portionDivide post-rift crochet hook part to work on, cause knitting machine to produce defect ware or waste product, makeThe operating efficiency of knitting machine is higher.
Preferably, in the checkout gear of above-mentioned crochet hook part, shape information extraction unit bagDraw together: length extraction unit; Shape information comparing unit comprises: length comparing unit; LengthExtraction unit extracts length information, the pin at the top of crochet hook part from the real-time imaging of crochet hook partThe length information of tip and the length information of shank send to length comparing unit; Length RatioUnit receives length information, the length information of needle tip and the length of shank at the top of crochet hook partDegree information, and by the length information of the length information at the top of crochet hook part, needle tip and shankThe image of length information and the complete crochet hook part that obtains and preserve in advance in extract completeThe length information of the length information at the top of crochet hook part, the length information of needle tip and shank entersRow relatively, determines that according to result relatively whether crochet hook part is complete.
Comprise length extraction unit by further clear and definite shape information extraction unit, form letterBreath comparing unit comprises length comparing unit, thereby by length extraction unit and Length RatioUnit completes length information and compares, and determines that according to comparative result whether crochet hook part is complete,Whether definite crochet hook part that can be is rapidly and efficiently complete.
Knitting machine is also provided in an embodiment of the present invention, has comprised for controlling crochet hook part fortuneThe control system of row, also comprises, as the checkout gear of the crochet hook part of above-described embodiment.
The knitting machine that the embodiment of the present invention provides, by comprising for controlling crochet hook part operationControl system and comprising as the checkout gear of the crochet hook part of above-described embodiment, by crochet hook partCamera in checkout gear obtains the real-time imaging of crochet hook part, and by the detection dress of crochet hook partThe image processor of putting extracts the shape information of crochet hook part from the real-time imaging of crochet hook part,Extract with obtaining and preserve in advance the image of complete crochet hook part from the shape information of crochet hook partThe shape information of complete crochet hook part compare, obtain the similarity of shape information; According toThe similarity of shape information determines that whether crochet hook part is complete. In the time that crochet hook part part ruptures, logicalCross the shape information of the crochet hook part extracting from the real-time imaging of crochet hook part and complete crochet hook partShape information difference, therefore can not produce erroneous judgement, can not make the post-rift crochet hook part of part continueContinuous work, causes knitting machine to produce defect ware or waste product, and the operating efficiency of knitting machine is higher.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,For a person skilled in the art, the present invention can have various modifications and variations. AllWithin the spirit and principles in the present invention, any amendment of doing, be equal to replacement, improvement etc.,Within all should being included in protection scope of the present invention.
Claims (7)
1. the detection method of crochet hook part, is characterized in that, described crochet hook part comprise needle tip,Top and shank, described detection method comprises: the real-time imaging that obtains described crochet hook part;
From the real-time imaging of described crochet hook part, extract described needle tip real time length information,The real time length information at described top and the real time length information of described shank;
By the real time length information of described needle tip and the complete crochet hook that obtains and preserve in advanceThe length information of the needle tip of the complete crochet hook part extracting in the image of part compares, and obtainsThe similarity of the length of needle tip;
By the length at the top of the length information at the top of described crochet hook part and described complete crochet hook partDegree information compares, and obtains the similarity of the length at top;
By the length of the shank of the length information of the shank of described crochet hook part and described complete crochet hook partDegree information compares, and obtains the similarity of the length of shank;
According to the similarity of the length at the similarity of the length of described needle tip, described top withAnd the similarity of the length of described shank determines that whether described crochet hook part is complete.
2. the detection method of crochet hook part according to claim 1, is characterized in that,According to the similarity of the length at the similarity of the length of described needle tip, described top and instituteThe similarity of stating the length of shank also comprises after determining that whether described crochet hook part is complete: ifThe similarity of the similarity of the length of described needle tip, the length at described top and described handleIn the similarity of the length of portion, one of be at least less than corresponding default similarity threshold, sendShut down and/or alarm command.
3. the detection method of crochet hook part according to claim 1, is characterized in that, instituteState according to the similarity of the length at the similarity of the length of needle tip, described top and described inThe similarity of the length of shank determines that whether described crochet hook part is complete, comprising:
If the similarity of the length of described needle tip is greater than default threshold value, determine described hookPin part is complete;
If the similarity of the length of described needle tip is less than described default threshold value and described topThe similarity of length be greater than described default threshold value, determine the needle tip of described crochet hook partFracture;
If the similarity of the length of described needle tip is less than described default threshold value, described topThe similarity of length be less than described default threshold value, and the length of described shank is similarDegree is greater than described default threshold value, determines the top fracture of described crochet hook part;
If the similarity of the length of described needle tip is less than described default threshold value, described topThe similarity of length to be less than the similarity of length of described default threshold value, described shank littleIn described default threshold value, determine the shank fracture of described crochet hook part.
4. the checkout gear of crochet hook part, is characterized in that, described crochet hook part comprise needle tip,Top and shank, described checkout gear comprises: camera, image processor;
Described camera obtains the real-time imaging of described crochet hook part and sends it to described image placeReason device;
Described image processor extracts described crochet hook part from the real-time imaging of described crochet hook partThe length information of the length information at top, the length information of needle tip and shank, by described hookThe image of the length information of the needle tip of pin part and the complete crochet hook part that obtains and preserve in advanceThe length information of the needle tip of the complete crochet hook part of middle extraction compares, and obtains needle tipThe similarity of length, by the length information at the top of described crochet hook part and described complete crochet hook partThe length information at top compare, obtain the similarity of the length at top, by described hookThe length information of the shank of pin part compares with the length information of the shank of described complete crochet hook part, obtain the similarity of the length of shank, and according to the similarity of the length of described needle tip,The similarity of the similarity of the length at described top and the length of described shank is determined described hookWhether pin part is complete.
5. the checkout gear of crochet hook part according to claim 4, is characterized in that, alsoComprise: controller, described controller obtains the length of described needle tip from described image processorThe similarity of length at similarity, the described top of degree and the length of described shank similarDegree, if the similarity of the length at the similarity of the length of described needle tip, described top andIn the similarity of the length of described shank, one of be at least less than corresponding default similarity threshold,Send and shut down and/or alarm command to the control system of the knitting machine at described crochet hook part place.
6. the checkout gear of crochet hook part according to claim 4, is characterized in that, instituteStating image processor comprises: length extraction unit and length comparing unit;
Described length extraction unit extracts described crochet hook part from the real-time imaging of described crochet hook partLength information, the length information of needle tip and the length information of shank at top send to instituteState length comparing unit;
Described length comparing unit receives length information, the needle tip at the top of described crochet hook partLength information and the length information of shank, and by the length information at the top of described crochet hook part,The length information of needle tip and the length information of shank and the complete hook that obtains and preserve in advanceThe length information at the top of the complete crochet hook part extracting in the image of pin part, the length of needle tipThe length information of information and shank compares, and determines described crochet hook part according to result relativelyWhether complete.
7. knitting machine, is characterized in that, comprises the control system for controlling the operation of crochet hook part,Also comprise the checkout gear of the crochet hook part as described in claim 4-6 any one.
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| CN201410064199.4A CN103789922B (en) | 2014-02-25 | 2014-02-25 | The detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part |
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| CN201410064199.4A CN103789922B (en) | 2014-02-25 | 2014-02-25 | The detection method of crochet hook part, checkout gear and the knitting machine of crochet hook part |
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| CN104131411B (en) * | 2014-07-23 | 2016-08-24 | 中国科学院上海光学精密机械研究所 | Circular knitting knitting machine needle screening device and knitting needle discriminating method |
| CN109881356B (en) * | 2018-12-25 | 2021-03-16 | 西安工程大学 | Hosiery machine knitting needle online detection device and method based on SVM image classification |
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| US3659437A (en) * | 1969-07-25 | 1972-05-02 | Reynolds Tobacco Co R | Knitting machine defective needle detector |
| US4020655A (en) * | 1975-01-22 | 1977-05-03 | Centre Technique Industriel Dit: Institut Textile De France | Device for detecting defects in needles on a knitting loom which is in operation |
| CN85107461B (en) * | 1985-10-13 | 1986-09-17 | 河南省驻马店地区内衣厂 | Magnetic cotton guide |
| US5333208A (en) * | 1990-05-08 | 1994-07-26 | Theodor Grosz & Sohne | Method and arrangement for optical control of the needles of knitting machines |
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| JPH0314663A (en) * | 1989-06-12 | 1991-01-23 | Gunze Ltd | Sensor for needle breakage in knitting machine |
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|---|---|---|---|---|
| US3529445A (en) * | 1968-04-08 | 1970-09-22 | Sick Erwin | Apparatus for controlling the operation of circular knitting machines |
| US3659437A (en) * | 1969-07-25 | 1972-05-02 | Reynolds Tobacco Co R | Knitting machine defective needle detector |
| US3646542A (en) * | 1970-02-25 | 1972-02-29 | Russell Mills Inc | Monitor systems |
| US4020655A (en) * | 1975-01-22 | 1977-05-03 | Centre Technique Industriel Dit: Institut Textile De France | Device for detecting defects in needles on a knitting loom which is in operation |
| CN85107461B (en) * | 1985-10-13 | 1986-09-17 | 河南省驻马店地区内衣厂 | Magnetic cotton guide |
| US5333208A (en) * | 1990-05-08 | 1994-07-26 | Theodor Grosz & Sohne | Method and arrangement for optical control of the needles of knitting machines |
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