Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
  • G06M1/00—Design features of general application
  • G06M1/08—Design features of general application for actuating the drive
  • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
  • G06M1/101—Design features of general application for actuating the drive by electric or magnetic means by electro-optical means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
  • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
  • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
  • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
  • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
  • B65H63/062—Electronic slub detector
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
  • G01N33/36—Textiles
  • G01N33/365—Filiform textiles, e.g. yarns
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/30—Handled filamentary material
  • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

• the present invention allows to serve and to check, like with the human eye, one or more textile yarns in real time mode, on the basis of successions of numerical photographs taken by a camera and processed by a microprocessor
• the microprocessor By means of an internal analysis by the microprocessor comprised in the device, it allows i a to recognize the form and the colour of a yam or yarns, as well as to identify the number of yarns present or passing in front of the field of vision of the camera in the device
• devices for the detection of yarns are commonly mechanical, electrical or optical devices working with visible or infrared light These types of devices gain information about "all or nothing” (presence or absence of an object) and do not either allow the detection of several yarns at the same time at one single detection device
• the device according to this invention results in an automatic instrument or apparatus allowing to observe and to check in real time mode one or more yarns at the same time
• the device according to the invention is primarily characterized in that it comprises a numerical camera associated with an image processing microprocessor It is thereby able i a to detect the presence or absence of one or a plurality of yarns and to determine for each yarn in said plurality its movement, as well as its form, cross-section and/or colour
• the device according to the invention compasses at least
• a numerical camera of a type of CCD or CDD an image processing microprocessor a communication microprocessor, a continuous and regulated power supply
• the numerical camera successively and permanently takes very high-speed photographs of the yarn or yarns present or moving in front of its field of vision. Said photographs are then processed by a microprocessor which determines in a logical way i.a. the presence of the yam or yarns, as well as various information about it or them, such as the form, cross-section, movement, if any, and colour or colours.
• the device according to the invention allows the observation, in real-time, of one or several yarns found in the field of vision of the numerical camera. Thanks to its microprocessor the device can store, check and follow the yarn or yarns in real-time mode.
• An advantage of this invention resulting from the use of a numerical camera is that this camera allows it to see, like with the human eye, what is found within its field of vision.
• each photograph taken by the numerical camera is transformed into a binary image.
• This image (N) is stored and then compared to a stored earlier image (N - 1) with respect to various information such as the number of yarns that are present, their form, thickness (yam count or titre), colour, etc.
• the same microprocessor can determine the number of yarns present in front of the camera and for each one of them find out the movement resp. non-movement, the speed, the form, the thickness, colour, etc.
• Said invention is able to determine:
• Said invention can also determine the colour of the yarn or yams found in front of the field of vision of the camera. -> -
• the device according to the invention is able to give information about the number of yarns present in front of the camera, to find out if they move and in case they do with what speed, as well as to inform about the form of the yarn or yarns and colour or colours.
• the device according to the invention is able to send out information of a detection of a fault (error).
• the information of a fault may be used to stop the machine for which the device is provided.
• one or more yarns is or are not present as expected in front of the numerical camera
• one or more yarns does or do not move although it or they are supposed to;
• one or more yams does or do not move with the desired speed:
• one or more yarns does or do not have the right form but has or have imperfect spots or portions, e.g. so called weak spots (too small thickness), knots, too thick portions, etc.;
• one or more yarns has or have a colour which differs or differ from a desired colour or colours.
• the device according to the invention may transmit and receive information to resp. from one or more other information devices or systems (Fig. 4).
• the device can measure with high precision the respective position of the yarn or yarns present between the numerical camera and the laser beam facing it.
• two or more numerical cameras may be placed perpendicularly with respect to each other in order to observe the yarn or yarns in more than one dimension.
• the device according to the invention may also incorporate two numerical cameras as explained above, each associated with a laser emitting a rectilinear beam, the rays of which are completely parallel and directed towards the cameras.
• the device can recognize even very complex yarn or yarns in which the fibres of filaments e.g. are extremely high-twisted, or intermingled.
• the device according to the invention can recognize other complex yarn or yarns in which the fibres or filaments have different colour, different thickness or comprise of different material.
• the device according to the invention is characterized by an illumination source S arranged to face a numerical camera C such that a yarn or yarns F being present in the field of vision SC are observed like with a human eye.
• the numerical camera C which is illuminated by the light source S observes the yarn or yarns F.
• a microprocessor P comprised in the device is continuously taking successive photographs of the view seen by the camera C and stores them for further processing and comparing purposes.
• the light source L may be a laser which illuminates the numerical camera C.
• the particular property of such a light source L is that the laser generates rectilinear rays which allow to achieve a constant, identical illumination of the entire vision surface of the numerical camera C.
• the yarn or yarns F which is or are present between the source L and the camera C are then observed and recognized with a very high degree of precision.
• the numerical camera continuously sees all that is found in its field of vision, the microprocessor takes an image thereof and digitizes said image into a digital or numerical photograph N at a point in time T, which the microprocessor then compares to an earlier taken and stored photograph N - 1. After complex calculations, said comparison allows to determine the number of yarns present, their movements, if any, their displacements, their speed, their quality, i.e. their form, thickness (yarn count or titre), imperfections, their colours, etc.
• the microprocessor is the heart or rather brain of the device which is able to recognize and analyze the yarn or yarns as well as to determine any faults or deficiencies which may occur.
• the microprocessor can send a stop signal to a machine served by the detection device but it can also transmit and receive information to resp. from one or several other microprocessor information units. Furthermore, it is possible to observe the photographic numerical image "at distance" by the microprocessor and the numerical camera in order to have all relevant information or parameters of this photograph in real time.
• the microprocessor takes several hundreds of photographs per second allowing to obtain a living sequence of the yarns on a real time basis.
• the detection device can be used to collect in real time desired or necessary information about the detected yarn or yarns, such as e.g. their presence, movement, quality, form, structure, imperfections, thickness (yarn count or titre), colour, any fault conditions, etc.
• the information gained by the observation in the detection device could e.g. be used in any field of yarn processing, e.g. in the weaving or knitting field, more closely for example in, upstream or downstream a yam feeding device supplying yarn to a weaving or knitting machine, e.g.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Quality & Reliability (AREA)
• Health & Medical Sciences (AREA)
• Theoretical Computer Science (AREA)
• Food Science & Technology (AREA)
• Medicinal Chemistry (AREA)
• Analytical Chemistry (AREA)
• Biochemistry (AREA)
• General Health & Medical Sciences (AREA)
• Immunology (AREA)
• Pathology (AREA)
• Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20416542

Family Applications (1)

Country Status (4)

Cited By (4)

Families Citing this family (9)

Family Cites Families (7)

• 1999
  • 1999-07-21 SE SE9902753A patent/SE9902753D0/xx unknown
• 2000
  • 2000-07-21 EP EP00982721A patent/EP1212255A1/de not_active Withdrawn
  • 2000-07-21 AU AU24823/01A patent/AU2482301A/en not_active Abandoned
  • 2000-07-21 WO PCT/EP2000/007009 patent/WO2001007352A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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