EP0837829B1 - Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame - Google Patents

Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame Download PDF

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Publication number
EP0837829B1
EP0837829B1 EP96923976A EP96923976A EP0837829B1 EP 0837829 B1 EP0837829 B1 EP 0837829B1 EP 96923976 A EP96923976 A EP 96923976A EP 96923976 A EP96923976 A EP 96923976A EP 0837829 B1 EP0837829 B1 EP 0837829B1
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EP
European Patent Office
Prior art keywords
slit
measuring
thread
aperture
receivers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96923976A
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German (de)
English (en)
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EP0837829A2 (fr
Inventor
Henrik Lilja
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Picanol NV
Iro AB
Original Assignee
Picanol NV
Iro AB
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Filing date
Publication date
Application filed by Picanol NV, Iro AB filed Critical Picanol NV
Publication of EP0837829A2 publication Critical patent/EP0837829A2/fr
Application granted granted Critical
Publication of EP0837829B1 publication Critical patent/EP0837829B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum

Definitions

  • the invention relates to an optoelectronic sensor device according to the preamble of claim 1 and a Weft thread measuring device according to the preamble of the claim 4th
  • GB-C-1 283 528 Sensor device is the cross passage of a spun Fadens detected in a ring spinning machine, the running Thread runs in an opening.
  • the opening is from penetrated by a beam of light, one in an opening wall arranged light source diametrically through the opening onto one opposite receiver throws.
  • a Aperture slit provided in front of the recipient.
  • the receiver speaks on light variations or the shadow passing through the aperture slit of thread. Interferences such as vibrations, extraneous light and Like. Can cause the receiver to issue an error signal, although the thread has the aperture slit in the scanning zone didn't happen properly.
  • weft thread measuring devices As they are typically for a long time on jet looms to provide the Weft thread is used for control and monitoring exact information of the insertion process of each weft necessary when and that the weft when pulling passes a scan zone.
  • Trigger sensor provided with one on the illuminated Scanning zone aligned, responsive to light variations Receiver is equipped. Because in practice operational Vibrations, extraneous light and other disturbances affect the receiver also make it respond, is the meaningfulness the signals obtained from the passages of the weft unreliable.
  • the signal evaluated in the differential circuit is therefore because of the gradual increase in signals and also gradual signal drop weak and requires considerable Reinforcement effort, but also effective with interference becomes. Furthermore, one is clear in such measurement storage devices aixal back and forth movement of the limit on the trigger side of the thread supply present on the storage body is indispensable, especially when working with thread separation and / or a vivid pattern is woven.
  • the invention has for its object a simple optoelectronic Sensor device of the type mentioned and to provide a weft measuring storage device in which from the thread passage a strong and meaningful as well easily discriminable against signals from interference Useful signal can be generated.
  • the measuring storage device With the measuring storage device the take-off sensor despite varying thread take-off speed, different thread qualities and changing Position of the longitudinal direction of the thread in the scanning zone exact information provide when and that the thread passes the scanning zone.
  • thread generally refers to thread-like ones Substrates such as yarns, threads, threads, threads, wires, Ribbon, film strips and the like
  • Sensor devices the receiver with an illustration or sharpen the object to be scanned and position sensitive detectors, imaging optics with an aperture and high quality circuitry.
  • Sensor devices are for scanning a thread passage too expensive for itself or in a measurement storage device and expensive and depart from it for other reasons a use from (e.g. WO 89/00215, WO-A-90 06 504, EP-A-0 519 281).
  • the task is in an optoelectronic sensor device with the features of claim 1 and in a weft measuring memory device with the features of Claim 4 solved.
  • the response of the two receivers in the as a differential circuit designed evaluation circuit generates the useful signal.
  • a compact Reach the design of the trigger sensor the trigger sensor practically independent of the speed variations of the thread moving through the scanning zone and before all regardless of the respective position of the longitudinal direction of the thread is in the scan zone.
  • the embodiment according to claim is particularly expedient 6. Here it is ensured that the thread from both receivers only in areas restricted by the slits of the receiver surfaces and regardless of the position of the longitudinal direction of the thread temporally and / or geometrically in the scanning zone is perceived differently.
  • a particularly expedient embodiment is based on claim 7 out. It is useful if the crossbar of the T of the thigh maintains a small distance so that about the geometric configuration of the diaphragm slots Asymmetry in the scanning of the thread results for the Differentiation between useful and interference signal and for a strong useful signal is important.
  • Diaphragm slots of the same size are advantageous.
  • the embodiment according to claim 10 is particularly important. With this adjustment of the positions of the diaphragm slots on the possible positions of the longitudinal direction of the thread in the scanning zone it is excluded that the thread of both receivers is geometric or is perceived at the same time.
  • a compact, reliable and reliable design of the trigger sensor possible.
  • the holder with its channels, the receivers, the light source and the slit is a simple and component that can be prefabricated inexpensively and with high precision, which can be accommodated cheaply even in tight spaces and can be easily replaced.
  • the cover plate avoids contamination or dust in the holder arranged components.
  • the distance dimensioning according to claim 14 has proven to be advantageous proven.
  • Fig. 1 illustrates schematically the structure of an optoelectronic Sensor device S for determining the passage one is also transverse to its longitudinal direction D (e.g. in the direction the arrow 1) through a scanning zone 3 moving thread Y.
  • the thread Y also in the direction of arrow 2, i.e. in its Longitudinal direction D, are moved.
  • the scanning zone S is on spatial area that is at least one light source L is illuminated, and on those in the embodiment shown two receivers R1, R2 with their receiver surfaces 4 and 5 are aligned.
  • two receivers R1, R2 with their receiver surfaces 4 and 5 are aligned.
  • offset light source L could either be on the side of the Receiver or on the side opposite the receiver a central light source L 'may be provided.
  • R2 Before the Receiver area 4 or 5 of each receiver R1, R2 is a Aperture slit A1 or A2 is provided in the beam path between the thread Y or the scanning zone 3 and each receiver surface 4 and 5.
  • the two aperture slots A1 and A2 are, for example, of the same size, have the same geometric configuration and a cross-sectional main axis 6 and one each secondary axis 7 lying perpendicular to it.
  • the aperture slots For example, A1, A2 are approximately 1 with a length of approximately 4 mm mm wide.
  • aperture slit A2 is the aperture slit A2 with its Main axis 6 to that defined by the two receivers R1, R2 Main direction aligned while the aperture slit A1 runs perpendicular to this, with an extension of the aperture slot A2 cuts the aperture slit A1 approximately in the middle.
  • Both aperture slots A1, A2 could be relative to each other also be twisted, but it is important that they are together include an acute angle up to a maximum of 90 °.
  • 2A and 2B illustrate the side views of two Design variants of the sensor device according to FIG. 1.
  • 2A are the light source L and the two receivers R1, R2 on the same side of the scanning zone 3, under the there is an element 8, either as a reflector or is designed as a light absorber. Between element 8 and an at least partially translucent cover 10 a passage gap is defined for the Y thread.
  • the Light source L and the two receivers R1, R2 are taken into account certain light reflection angle to each other aligned. Both receivers R1, R2 are based on that of the Light source L illuminated scanning zone 3 and aligned reflected by the reflection light.
  • Each receiver R1, R2 is an aperture slit A1, A2, e.g. in an aperture element 9, upstream.
  • each receiver R1, R2 speaks to that Light variation on. Both receivers R1, R2 are connected to an evaluation circuit C (Fig. 2B) connected by the differential principle works and from the difference of photoelectric Response signals of the receiver R1, R2 a useful signal generated.
  • element 8 absorbs the light from the light source L, then the receivers R1, R2 speak to that reflected by the thread Y. Light on.
  • the 2B operates according to the Light barrier principle, i.e. the light from the light source L ' passes through the scanning zone 3 and meets the receivers R1, R2, corresponding to the passage of the Y thread the outline of the Y thread.
  • the receivers R1, R2 of Fig. 2A or 2B matched to the light coming from the light source L. are in the absence of the thread Y by the Aperture slots A1, A2 limited area of the receiver surfaces 4, 5 fully loaded with light.
  • the evaluation circuit C results from the difference of the response signals of both Receiver R1, R2 the value zero or a constant signal value (e.g. a voltage value).
  • the thread Y passes the scanning zone 3 in the direction of arrow 1, then the by the Aperture slit A1 limited area on the receiver surface 4 of the receiver R1 at least partially shadowed, and later also the one limited by the aperture slit A2 Area on the receiver area of the second receiver R2.
  • the sensor device S is a trigger sensor Thread delivery device that has a thread supply on a storage area B. 13 of several, preferably axially spaced, Thread turns carries from which the thread Y over a pull-off edge 12 is withdrawn in the direction of an arrow 2, wherein the thread Y rotates in the direction of arrow 1 and the receiver R1, R2 with their front diaphragm slots A1, A2 happens.
  • Thread delivery device varies the axial position of the limit 14 considerable (double arrow 15).
  • Thread withdrawal also the longitudinal direction D in the area of the receiver R1, R2 between an almost axial position and one Almost circumferentially oriented position can vary. This is indicated by the arrows D.
  • the position of the thread longitudinal direction D in the scanning zone of the sensor device mainly because of the order of the two aligned with each other at an acute angle Aperture slits A1, A2, from one thread passage won a meaningful useful signal as an indication that a Thread turn has been withdrawn and when it was withdrawn has been.
  • the aperture slots A1, A2 are in the form of a T. arranged, the crossbar of the T adjacent the trigger edge 12 and is aligned in the circumferential direction.
  • the dashed line also indicates that the reverse is also used Arrangement of the aperture slots A1, A2 is possible, or even (indicated on the left and dashed lines) an inclined position of both Aperture slots A1, A2 with respect to the circumferential Deduction margin 12.
  • the aperture slits A1 are shorter than the diameter of the circular receiver area each Receiver R1, R2. But it is also conceivable, the aperture slots to train the same length or even longer than that Diameter of the receiver surfaces.
  • FIG. 4 schematically illustrates a selection of possible shapes for the aperture slots A1, A2.
  • a rectangular shape is conceivable with the cross-sectional and major axis 6 and the cross-sectional and main axis 7, which are perpendicular to the cross-sectional main axis 6 lies. It is also possible to cover the slits A1, A2 oval, double concave or double convex each in view of the fact that the outline of the to be detected Fadens in its full size as quickly as possible over the Aperture slot is or the aperture slot if possible leaves quickly to get a strong useful signal strong frequency component or a strong modulation.
  • 5A, 5B is a concrete embodiment of a weft measuring memory device F shown. These devices have been around have long been known and are used, for example, to deliver a Weft thread used for a jet loom, the Measurement storage device F in addition to the task, one for the respective pattern of sufficiently large thread supply for pulling off to keep ready with constant pull voltage, too the task accomplished, the respective peelable weft length limit to an adjustable value.
  • a drive shaft 16 is rotatably mounted on the a storage body B, e.g. a bar drum or bar cage 20 from several axially extending and in the circumferential direction spaced rods 21, in turn is rotatably mounted.
  • a housing 23 is attached in which in addition a stop device with a stop element 24 as a trigger sensor serving optoelectronic sensor device S housed is.
  • the thread is pulled under the housing 23.
  • the stop element 24th extended as soon as no thread may be drawn off. Becomes however, thread is required, then the stop element 24 is withdrawn and the thread pulled off.
  • the sensor device S registers each winding is subtracted and transmits a Representing the point in time and the occurrence of a passage Useful signal to the control device 19 before reaching of the thread length to be withdrawn, the stop element 24 again indent.
  • the distance can be adjusted with an adjusting device V. adjust the rods 21 from the axis of the device, and hence the length of each thread turn.
  • a block-shaped holder 26 e.g. a Plastic molding, has a storage body B facing lower surface 27. Three channels open into surface 27 28, 29 and 30.
  • the light source L is arranged in the channel 30.
  • the channels R1 and R2 are in the channels 28 and 29 intended.
  • the aperture slots A1, A2 are formed.
  • a translucent cover plate 31 is arranged on the surface 27 be.
  • the channel 30 is up with respect to a radial plane the drive shaft 16 is set at an angle ⁇ 3 of approximately -27 °, while the channel 28 with an angle ⁇ 2 of approximately + 22 ° and the channel 29 inclined at an angle ⁇ 1 of approximately + 32 ° is.
  • the axes of all three channels are aimed in the scanning zone 3.
  • the trigger sensor S is expedient in the direction of rotation of the thread immediately after pulling off Stop element 24 arranged.
  • the aperture slots A1, A2 could be in aperture plates (in Fig. 3 indicated), which are in their rotational positions have it adjusted, e.g. depending on the direction of rotation of the Drive shaft or taking into account the respective thread geometry optimal deduction of the relative positions when subtracting the aperture slots A1, A2 relative to each other and in To make reference to the axis of the memory body. Also, both aperture slots A1, A2 could be combined in one for tuning rotatable aperture plates with fixed mutual Assignment should be provided.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Claims (15)

  1. Détecteur optoélectronique (S) pour déterminer le passage d'un fil (Y) Ci se déplace transversalement à sa direction longitudinale (D) à travers une zone de balayage (3), avec une source de lumière (L, L') illuminant la zone de balayage et au moins un récepteur (R1, R2) répondant à des variations de lumière et aligné sur la zone de balayage, le récepteur étant connecté à un circuit sélecteur électrique (C), et avec une fente d'obturateur (A1, A2) disposée entre le fil (Y) et la surface de réception (4, 5) du récepteur, caractérisé en ce qu'au moins deux récepteurs adjacents (R1, R2) sont alignés sur la zone de balayage (3), respectivement une fente d'obturateur (A1, A2) étant placée en amont des surfaces de réception (4, 5), en ce que chaque fente d'obturateur (A1, A2) présente une configuration géométrique avec un axe de section principal long (6) et un axe de section secondaire court (7) perpendiculaire à celui-ci, et en ce que les fentes d'obturateur (A1, A2) avec l'axe de section principal (6) d'une fente d'obturateur (A1) sont disposées sous un angle aigu d'un maximum de 90° transversalement par rapport à l'axe de section principal de la fente d'obturateur avoisinante (A2).
  2. Détecteur selon la revendication 1, caractérisé en ce que chaque surface de réception (4, 5) est approximativement circulaire dans la direction d'incidence de la lumière, et en ce que la longueur de l'axe de section principal de la fente d'obturateur placée en amont (A1, A2) est plus courte que le diamètre de la surface de réception.
  3. Détecteur selon les revendications 1 et 2, caractérisé en ce que les deux récepteurs (R1, R2) sont connectés ensemble au circuit sélecteur (C) réalisé comme un circuit différentiel.
  4. Dispositif de stockage de mesure de fil de trame (F) avec un détecteur optoélectronique (S) en tant que détecteur de levée d'un fil de trame (Y) pouvant être levé en tournant et à la défilée à partir d'un élément de stockage (B), le détecteur présentant au moins deux récepteurs optoélectroniques (R1, R2) disposés l'un après l'autre dans la direction axiale de l'élément de stockage (B), au moins une source de lumière (L) pour illuminer une zone de balayage (3) sur l'élément de stockage, et un circuit sélecteur électronique (C), qui permet de générer un signal utile à partir des variations de lumière apparaissant à chaque passage du fil de trame (Y) par la zone de balayage (3), caractérisé en ce qu'entre la zone de balayage (3) et chaque récepteur (R1, R2), une fente d'obturateur (A1, A2) est prévue, et en ce qu'une fente d'obturateur (A1) est disposée sous un angle aigu d'un maximum de 90° par rapport à l'autre fente d'obturateur (A2).
  5. Dispositif de stockage de mesure selon la revendication 4, caractérisé en ce qu'une fente d'obturateur (A1) s'étend dans la direction circonférentielle et l'autre fente d'obturateur (A2) s'étend dans la direction axiale de l'élément de stockage (B).
  6. Dispositif de stockage de mesure selon la revendication 4, caractérisé en ce que une prolongation imaginaire d'une fente d'obturateur (A2) coupe l'autre fente d'obturateur (A1).
  7. Dispositif de stockage de mesure selon la revendication 5, caractérisé en ce que les deux fentes d'obturateur (A1, A2) sont disposées en T.
  8. Dispositif de stockage de mesure selon au moins l'une quelconque des revendications 4 à 7, caractérisé en ce que les deux fentes d'obturateur (A1, A2) présentent une forme rectangulaire, doublement concave ou doublement convexe.
  9. Dispositif de stockage de mesure selon au moins l'une quelconque des revendications 4 à 8, caractérisé en ce que les deux fentes d'obturateur (A1, A2) ont la même dimension.
  10. Dispositif de stockage de mesure selon au moins l'une des revendications 4 à 9, caractérisé en ce que les deux fentes d'obturateur (A1, A2) sont disposées par rapport à toutes les positions de la direction longitudinale du fil (D) dans la zone de balayage (3), possibles lors de la levée du fil, de telle sorte qu'un mouvement du fil (Y), simultané sur le plan géométrique ou temporel par l'intermédiaire des deux fentes d'obturateur (A1, A2), est exclu.
  11. Dispositif de stockage de mesure selon la revendication 4, caractérisé en ce que sur l'élément de stockage (B), au-dessous de la zone de balayage (3), est disposé un réflecteur (8), en ce que dans un boítier (23) disposé de façon stationnaire à l'extérieur de l'élément de stockage (B) est disposé un support en forme de bloc (26), qui possède une surface (27) tournée vers la zone de balayage (3), surface sur laquelle débouchent des canaux (28, 29, 30), qui visent la zone de balayage (3), provenant d'au moins une source de lumière (L) disposée dans le support et de deux récepteurs (R1, R2), de préférence des photodiodes, disposés dans le support, et en ce que les embouchures des canaux (28, 29) des récepteurs (R1, R2) sont réalisées comme des fentes d'obturateur (A1, A2) avec une configuration approximativement rectangulaire.
  12. Dispositif de stockage de mesure selon la revendication 11, caractérisé en ce que les canaux (28, 29, 30) se trouvent dans un plan axial commun (16') de l'élément de stockage (B), en ce que le canal (30) provenant de la source de lumière (L) est incliné à environ -27° par rapport à un plan radial (X) de l'élément de stockage (B), et en ce qu'un canal (28) provenant d'un récepteur (R2) est incliné à environ +22° et l'autre canal (29) provenant de l'autre récepteur (R1) à environ +32° par rapport au plan radial.
  13. Dispositif de stockage de mesure selon les revendications 11 et 12, caractérisé en ce qu'une plaque de recouvrement transparente (31) est disposée au niveau de la surface (27) du support (26).
  14. Dispositif de stockage de mesure selon la revendication 11, caractérisé en ce que la distance vue dans la direction axiale de l'élément de stockage (B) entre les fentes d'obturateur (A1, A2) correspond approximativement à la largeur de chaque fente d'obturateur (A1, A2).
  15. Dispositif de stockage de mesure selon au moins l'une quelconque des revendications 4 à 14, caractérisé en ce que chaque fente d'obturateur (A1, A2), ou les deux fentes d'obturateur (A1, A2), est/sont découpée(s) dans une plaquette d'obturateur qui est fixée dans une position rotative au choix, de préférence réglable, dans une monture, de préférence sur la surface (27) du support (26) ou dans l'embouchure d'un des canaux (28, 29).
EP96923976A 1995-07-11 1996-07-05 Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame Expired - Lifetime EP0837829B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19525260A DE19525260A1 (de) 1995-07-11 1995-07-11 Optoelektronische Steuervorrichtung und Schußfaden-Meßspeichergerät
DE19525260 1995-07-11
PCT/EP1996/002975 WO1997003012A1 (fr) 1995-07-11 1996-07-05 Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame

Publications (2)

Publication Number Publication Date
EP0837829A2 EP0837829A2 (fr) 1998-04-29
EP0837829B1 true EP0837829B1 (fr) 1999-09-29

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EP96923976A Expired - Lifetime EP0837829B1 (fr) 1995-07-11 1996-07-05 Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame

Country Status (7)

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US (1) US5966211A (fr)
EP (1) EP0837829B1 (fr)
JP (1) JP2915147B2 (fr)
KR (1) KR100293027B1 (fr)
CN (1) CN1084285C (fr)
DE (2) DE19525260A1 (fr)
WO (1) WO1997003012A1 (fr)

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SE0401676D0 (sv) * 2004-06-29 2004-06-29 Iropa Ag Optoelektronisk garngivar-anordning
DE102007037004A1 (de) * 2007-08-06 2009-02-26 Memminger-Iro Gmbh Vielseitige Fadensensoreinheit
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CN103437043A (zh) * 2013-08-20 2013-12-11 海安金太阳纺织有限公司 可调控传纱角度的储纬器
CN103698277A (zh) * 2013-12-06 2014-04-02 浙江师范大学 一种微细物体的差动检测方法
CN107285112B (zh) * 2017-08-04 2019-04-23 国网四川省电力公司广元供电公司 基于自动控制技术的履带式牵引装置
IT202400004420A1 (it) * 2024-02-29 2025-08-29 Roj S R L Porgitrama per telai di tessitura comprendente un gruppo ottico indipendente, integrato nel gruppo elettromagnete di rilascio del filo di trama

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Publication number Publication date
KR19990028680A (ko) 1999-04-15
CN1190379A (zh) 1998-08-12
JP2915147B2 (ja) 1999-07-05
CN1084285C (zh) 2002-05-08
DE19525260A1 (de) 1997-01-16
KR100293027B1 (ko) 2001-11-15
US5966211A (en) 1999-10-12
WO1997003012A1 (fr) 1997-01-30
JPH10511069A (ja) 1998-10-27
EP0837829A2 (fr) 1998-04-29
DE59603233D1 (de) 1999-11-04

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