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EP2082085B1 - Optoelektrischer garnsensor - Google Patents

Optoelektrischer garnsensor Download PDF

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Publication number
EP2082085B1
EP2082085B1 EP07818840A EP07818840A EP2082085B1 EP 2082085 B1 EP2082085 B1 EP 2082085B1 EP 07818840 A EP07818840 A EP 07818840A EP 07818840 A EP07818840 A EP 07818840A EP 2082085 B1 EP2082085 B1 EP 2082085B1
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EP
European Patent Office
Prior art keywords
light
yam
light source
feeding device
scanning zone
Prior art date
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Not-in-force
Application number
EP07818840A
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English (en)
French (fr)
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EP2082085A1 (de
Inventor
Jerker Hellström
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Iro AB
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Iro AB
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Publication date
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Publication of EP2082085A1 publication Critical patent/EP2082085A1/de
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Publication of EP2082085B1 publication Critical patent/EP2082085B1/de
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Classifications

    • 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 a yarn feeding device according to the preamble of claim 1 and to an electro-optical yarn sensor according to the preamble of claim 16.
  • DE-A-19612953 discloses an electro-optical yarn sensor in a yarn feeding device, the yarn sensor comprising a flat barcode-like reflection strip which is bounded either by a strip aperture or by sidewardly located aperture zones. Only part of the light of the light source is used for scanning the yarn.
  • the electro-optical yarn sensor of the yarn feeding device has as light source either an LED or a laser diode, namely a so-called VCSEL (Vertical Cavity Surface Emitting Laser) capable of generating a narrow conical light beam directed on the reflective yarn scanning zone of the storage body.
  • the light beam generates a substantially round, e.g. annular and small, light spot on the scanning zone.
  • the scanning zone is retroreflective, i.e. reflects the light in the same direction as the light hits on the light scanning zone.
  • the reflective yarn scanning zone is curved convexly in circumferential direction of the storage body such that the light spot is somewhat spread to a longitudinal or elliptical light strip while being reflected to the receiver.
  • the light spot is spread in the direction of the axes of yarn windings carried by the storage body periphery.
  • the publication mentions an embodiment with a lens or aperture in the light path e.g. in the case of a light emitting diode as the light source to achieve a light spot on the reflective yarn scanning zone as small and sharp as possible. Due to the fact that reflective light from the concentrated small light spot is only spread a little in circumferential direction of the storage body by the convex reflective yarn scanning zone, relatively high precision is needed for positioning and aligning the light source and the receiver properly. Unavoidable manufacturing and assembly tolerances deteriorate the reading quality of the receiver and cause severe scanning fluctuations within a series of yarn feeding devices equipped with theoretically identical yarn sensors.
  • the transparent spreading body provided in the light path surprisingly improves the reading quality of the receiver and compensates better for unavoidable manufacturing and assembly tolerances.
  • the yam sensor operation is not at all sensitive to unavoidable relative movements occurring between the stationarily mounted light source/receiver combination and the reflective yam scanning zone on the storage body.
  • this improvement results from the fact that the transparent spreading body already spreads the small light spot created by the light beam from the light source on the spreading body essentially linearly in circumferential direction of the storage body into a relatively long and sharp light strip on the reflective yam scanning zone, with the longitudinal axis of the light strip being oriented essentially parallel to the axes of the yam windings carried on the storage body.
  • the light concentration in the light strip is high and results in a high concentration in the light reflected to the receiver.
  • the receiver then is subjected to concentrated light which the transparent spreading body retransmits to the receiver, and for this reason, reliably responds to the reflected light irrespective of manufacturing and assembly tolerances and also of the unavoidable relative movements of the storage body.
  • any reflection from the light strip is interrupted so sharply that the receiver reliably responds to the resulting high degree of modulation between the full light and the shadowed conditions.
  • the output signal from the receiver is strong and for this reason does not need significant amplification.
  • the transparent and solid spreading body already spreads the small and concentrated light spot into the sharp light strip distant from the reflective yam scanning zone such that the light strip will be relatively narrow but relatively long on the reflective yam scanning zone.
  • the reflected light is collected by the transparent spreading body and is converted again into a substantially round, e.g. annular, reflection light spot from which the light travels to the receiver. The longer the light strip on the scanning zone is, the better reflected light can be evaluated and processed by the receiver.
  • the provision of the markedly transparent spreading body allows to improve the yam sensor performance for fair cost.
  • the yam sensor may not only be implemented in yam feeding devices but also may be used for other yam scanning applications operating with light reflection.
  • the transparent spreading body preferably, is structured such that it operates similarly in both light directions along the optical axis of the yam sensor.
  • a majority of the light reflected from the longitudinal light strip on the scanning zone is collected by the transparent spreading body and is converted into a substantially round light beam directed to the location of the light source/receiver combination in order to actuate the receiver.
  • Collected reflected light is emitted from a light spot which is essentially round or annular and has a size which assures that the receiver reliably is hit by the reflected light irrespective of manufacturing and assembly tolerances.
  • the light source is a laser light source for emitting a slightly conical round and/or ring-shaped laser light beam, preferably of infrared light.
  • a laser light source is of particular advantage because of a strong light beam and a relatively low power consumption.
  • VCSEL vertical cavity surface emitting laser-diode
  • the light source may be a light diode, preferably emitting a slightly conical infrared light beam.
  • Reflective object sensors available from OPTEK Technology Inc., Texas 75006, USA types OPB 609, OPB 609V are perfect for the implementation in yam feeding devices, because the reflective object sensor contains the source (infrared emitting diode or VCSEL) and the receiver (NPN silicone phototransistor) side by side on parallel axes in a compact plastic housing which easily can be mounted, e.g. according to the surface mounting technology, on a printed circuit board. Combining these reflective object sensor types with the transparent spreading body results in an optimum performance of the yam sensor particularly in a yam feeding device.
  • the distance between the light source and the receiver is, preferably, less than 1.0 mm.
  • the transparent spreading body is arranged about halfway between the light source/receiver combination and the scanning zone. This arrangement assures similar optical conditions for both light directions. In particular the distance between the transparent spreading body and the reflective scanning zone results in a magnifying effect such that a sharp light line formed on the exit side of the transparent spreading body from the light spot created by the light source will form a relatively long and well defined light strip on the scanning zone.
  • the transparent spreading body is injection moulded from plastic material having optimised optical properties.
  • the transparent spreading body as well could be made from glass.
  • Surface parts of the transparent spreading body which are not used for receiving or emitting light could be covered with light absorbing or other types of coatings.
  • the transparent spreading body is a solid cylinder with the cylinder axis oriented perpendicular to the storage body axis and parallel to a tangent on the storage body periphery.
  • a simple solid cylinder converts a round light spot into a linear light line or light strip in one direction, and collects reflected light and converts the collected reflected light in a substantially round light spot and a well defined light beam to the receiver.
  • the transparent spreading body is solid and has two diametrically opposed and spaced apart convex cylindrical surface regions with at least substantially the same radius of curvature and straight parallel generatrices.
  • the radius of curvature is either equal or longer than the largest distance between both surface regions along the optical axis of the yam sensor.
  • the "squeezed" cylinder shape with a radius of curvature of each cylindrical surface region being larger than the distance between the surface regions along the optical axis treats the light in both directions such that the light is well focused to a certain extent.
  • the reflective scanning surface either is constituted by a reflector which is inserted into the storage body periphery, or by the storage body periphery itself, e.g., in the latter case by providing a mirror surface region on the storage body periphery.
  • the inserted reflector expediently, is positioned such that its outer surface is swept over by the yam windings when the yam windings are conveyed forward on the storage body periphery. This results in a desirable self-cleaning effect.
  • the scanning zone preferably, is curved convexly in circumferential direction of the storage body and has a straight generatrice essentially parallel to the storage body axis.
  • the convex curvature of the reflective scanning zone preferably, is similar to the curvature of the storage body periphery.
  • the reflective scanning zone is retroreflective. Retroreflective means that the majority of the light is reflected in the same direction as it hits the scanning zone.
  • a yam feeding device F in Fig. 1 e.g. a weft yarn feeding device for a weaving machine or a knitting yam feeding device for a knitting machine, comprises a housing 1 containing an electric motor 2 and a drum-shaped storage body 3.
  • the storage body 3 rotatably supported on a not shown drive shaft, however, is hindered by co-acting magnets 3' to rotate with the drive shaft (stationary storage drum).
  • the feeding device could be equipped with a rotatable storage body instead.
  • the drive shaft drives a winding element 4 which winds a yarn Y inserted from the left side into the yarn feeding device F into adjacent windings on the periphery of the storage body 3.
  • the yam then is withdrawn from the frontmost winding overhead of the storage body 3 and, optionally, through a withdrawal eyelet 6 axially.
  • the housing has a housing bracket 5 in which, in the shown embodiment, two electro-optical yam sensors S are mounted stationarily which are directed from the exterior into a reflective scanning zone 12, e.g. constituted by an inserted reflector M in the storage body 3.
  • the yam sensors S are in signal transmitting connection with a control unit C of the electric motor 2.
  • the control unit C executes the control of the electric motor 2, e.g.
  • the yam sensors S in order to accelerate, decelerate, or stop the electric motor, i.e., to drive winding element 4 such that a predetermined number of windings will be present on the storage body periphery for consumption.
  • the predetermined number of windings or the size of the yam store on the storage body is scanned by the yam sensors S in conventional fashion.
  • Each of the yam sensors S includes at least one light source E and one receiver R.
  • the light source E emits a slightly conical light beam to the reflector M; the receiver R receives reflective light from the reflector M.
  • the emitted light beam e.g. generates a light strip on the reflector M which light strip is shadowed while a yam winding is passing.
  • the receiver R responds to the shadowing or the presence of the light strip and generates a control signal representing the presence or absence, or passage of a yam winding, respectively.
  • the yam sensor S may scan the position of the frontmost boundary of the yam store on the storage body 3.
  • the yarn sensor S on the right side in Fig. 1 may scan either a maximum size of the yam store or the passage of each withdrawn yam winding.
  • the yam feeding device could be equipped with a single yam sensor only, or with more than two yam sensors. An additional yam sensor of the same type could be used to detect yam breakages. Even in the region of the withdrawal eyelet 6 a yam sensor S could be installed.
  • the light source E either is a light emitting diode (preferably infrared light) or a laser light source L, preferably a VCSEL (Vertical Cavity Surface Emitting Laser).
  • the receiver R is a photodiode or phototransistor. Particularly useful is a so-called "Reflective Object Sensor” as available from OPTEK Technology Inc., Texas 75006, USA, product types OPB 609, OPB 609V. Such a reflective object sensor is shown in Fig.
  • a light source/receiver combination 8 consisting of either an infrared emitting diode or a VCSEL as the IR emitter and an NPN silicone phototransistor 24 which are mounted side by side on parallel axes in a plastic housing 22.
  • each yam sensor S Part of each yam sensor S is a transparent spreading body B made from plastic material or glass having optimised optical properties.
  • the transparent spreading body is an injection moulded plastic part.
  • the transparent spreading body B is mounted about halfway between the light source/receiver combination 8 and the reflector M in the light path or optical axis of the yam sensor S, i.e. spaced apart from the light source/receiver combination 8 and also from the reflective scanning zone 12 of the storage body 3 (yam passing gap).
  • the light source/receiver combination 8 e.g. is mounted on a printed circuit board 7 in the housing bracket 5.
  • the transparent spreading body B as well may be mounted on the circuit board 7, e.g. by means of fastening elements 10 and spacers 11.
  • the spreading body B is integrally shaped with mounting lugs 9.
  • the transparent spreading body B has the shape of a "squeezed" cylinder with diametrically opposed convex cylindrical surface regions 13, 14 having essentially the same radius of curvature X and straight generatrices which extend perpendicular to the axis of the storage body and parallel to a tangent on the storage body periphery.
  • the radius of curvature X is either equal or larger (as shown) than the biggest diametrical distance between both surface regions 13, 14. For this reason, the thickness of the transparent spreading body B in the direction of the optical axis of the yam sensor S is about the same as the radius of the curvature X or even is less.
  • the reflective yam scanning zone 12 is conventional, i.e. either is constituted by a mirror surface on the storage body periphery, or by the shown inserted reflector M.
  • Surface portions of the transparent spreading body B which are not used for passing light may be covered or coated like surface 15 that is shown in Fig. 3 .
  • the light source E emits a slightly conical (about 20°) light beam 16 ( Fig. 4 ) which hits the surface region 13 and produces a light spot 17 which is round or annular.
  • the transparent spreading body B is structured, e.g. by its geometrical shape, such that it spreads the light spot 17 on the lower surface region 14 in the direction of the cylinder axis and such that ( Fig. 6 ) an axial light line 17' is formed from which the light beam continues as indicated by 19 and hits the scanning zone 12.
  • a longitudinal sharp light strip 18 is generated ( Fig. 5 ), the longitudinal extension of which is by far larger than the dimension of the light spot 17.
  • the longitudinal axis of the light strip 18 extends in circumferential direction, i.e.
  • the longitudinal extension L of the light strip 18 e.g. may be as long as the length of the transparent spreading body B, or even longer.
  • Fig. 3 indicates that in the light source/receiver combination 8 the light source E and the receiver R are arranged in close proximity to each other. Both are facing transparent spreading body B.
  • the reflective yam scanning zone 12 preferably; is convexly curved in circumferential direction of the storage body 3, preferably with the same radius X1 as the storage body periphery.
  • the curvature of the scanning zone 12 is of advantage in order to suppress oscillations in the reflected light ( Fig. 7 ) caused by unavoidable relative movements occurring in operation of the feed-up device between the storage body 3 and the housing bracket 5.
  • the reflective scanning zone 12 may have a polished finish or a mirror or is even made retroreflective. Retroreflective means that the light is reflected in the same direction as it hits the reflective scanning zone 12.
  • Fig. 7 illustrates how light 20 is reflected from the light strip 18 back to the transparent spreading body B where it hits the lower cylindrical surface region 14.
  • the transparent spreading body B is structured such that it collects the reflected light 20 and forms on the upper cylindrical surface region 13 a light spot (round or annular) which is similar to the light spot 17 but may be somewhat larger. From this light spot the reflected light 21 is directed to the location of the receiver R. In other words, the receiver R sees a clear round or annular light spot or light ring on the upper cylindrical surface region 13 of the transparent spreading body B.
  • the yam sensor S is configured to respond to the reflective light 20, 21, i.e. to either output a signal when a yam winding is absent at the location of the light strip 18 or when a yam winding is present at the location of the light strip 18, or while the winding is passing.
  • the transparent spreading body B does not necessarily have to have the shape as shown in Figs 2 to 7 . Instead any transparent spreading body B could be used which has the above-mentioned properties, e.g. a prismatic transparent body or the like.
  • the transparent spreading body B Since the transparent spreading body B generates a well defined and relatively long light strip 18 on the reflective yam scanning zone 12, and since reflected light is reliably brought back to the receiver R, unavoidable manufacturing and assembly tolerances in the geometric relation or optical chain between the light source/receiver combination 8, the transparent spreading body B and the reflective yam scanning zone 12 do not deteriorate the scanning property or performance of the yam sensor.
  • the transparent spreading body B is a fair cost component like the VCSEL, meaning that the yarn sensor can be manufactured for fair cost, is reliable and has a long service life.
  • more than one spreading body could be mounted in series along the light path, in order to achieve the same function, but to an even higher performance.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Facsimile Heads (AREA)
  • Light Receiving Elements (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Claims (18)

  1. Fadenliefervorrichtung (F), mit einem Gehäuse (1), das zum Generieren einer relativen Rotation zwischen einem Speicherkörper (3) und einem Wickelelement (4) einen Elektromotor (2) enthält, um auf die Peripherie des Speicherkörpers (3) aufeinander folgend Fadenwindungen aufzuwickeln, mit einer elektronischen Motorsteuervorrichtung (C)und mit zumindest einem elektro-optischen Fadensensor (S), der außerhalb des Speicherkörpers (3) an dem Gehäuse fixiert ist und zumindest eine Kombination aus einer Lichtquelle (E) und einem Empfänger (R) physikalisch eng benachbart zu der Lichtquelle (E) besitzt, wobei die Lichtquelle einen dünnen Lichtstrahl von außen auf eine reflektierende Fadenwindungsabtastzone (12) des Speicherkörpers richtet und der Empfänger (R) auf von der Abtastzone (12) reflektiertes Licht (20, 21) mit Signalen zumindest für die Motorsteuervorrichtung (C) anspricht, dadurch gekennzeichnet, dass
    in dem Lichtweg zwischen der Lichtquellen/Empfänger-Kombination und der reflektierenden Abtastzone (12) zumindest ein transparenter optischer Lichtverteilungskörper (B) angeordnet ist, und dass der transparente Lichtverteilungskörper (B) so strukturiert ist, dass er einen durch den Lichtstrahl (16) auf dem transparenten Lichtverteilungskörper (B) generierten, substanziell runden Lichtpunkt (17) in einen vorwiegend langgestreckten Lichtstreifen (18) auf der Abtastzone (12) aufspreizt, wobei die Ausdehnung (L) des Lichtstreifens (18) auf der Abtastzone (12) entlang dessen Längsachse erheblich größer ist als die Ausdehnung des Lichtpunktes (17) auf dem transparenten Lichtverteilungskörper (B), und dass der transparente Lichtverteilungskörper (B) so angeordnet ist, dass die Längsachse des Lichtstreifens (18) auf der reflektierenden Abtastzone (12) an dem Speicherkörper (3) substanziell parallel zu den Achsen der von der Peripherie des Speicherkörpers getragenen Windungen des Fadens (Y) orientiert ist.
  2. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) so strukturiert ist, dass die Majorität von dem Lichtstreifen (18) an der reflektierenden Abtastzone (12) reflektierten Lichts (20) in dem transparenten Lichtverteilungskörper (B) in einen substanziell runden Lichtstrahl (21) umgewandelt wird, der zurück zu der Stelle der Lichtquellen/Empfänger-Kombination emittiert wird.
  3. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Lichtquelle (E) eine Laserlichtquelle zum Emittieren eines geringfügig konisch runden oder ringförmigen Laserlichtstrahls (16) ist, vorzugsweise aus infrarotem Licht.
  4. Fadenliefervorrichtung gemäß Anspruch 3, dadurch gekennzeichnet, dass die Laserlichtquelle eine VCSEL ist.
  5. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die Lichtquelle (E) eine Lichtdiode zum Emittieren eines geringfügig konischen Lichtstrahls (16) ist, vorzugsweise aus Infrarotlicht.
  6. Fadenliefervorrichtung gemäß zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lichtquellen/Empfänger-Kombination ein elektronischer Modul (8) ist, der entweder aus einer Infrarotlicht-emittierenden Diode oder einem Vertikalhohlraum-oberflächlich emittierenden Laser (VCSEL) als dem IR-Emitter (E) und einem Fototransistor (24) als IR-Empfänger (R) besteht, die beide Seite an Seite mit parallelen Achsen und mit einem Abstand von weniger als 1,0 mm dazwischen in einem Gehäuse (22) montiert sind.
  7. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) annähernd an der Hälfte des Weges zwischen der Lichtquellen/Empfänger-Kombination und der Abtastzone (12) angeordnet ist.
  8. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) aus einem Kunststoffmaterial mit optimierten optischen Eigenschaften spritzgussgeformt ist, z. B. aus einem Polycarbonat, wie Grilamid®.
  9. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) aus einem Glasmaterial mit optimierten optischen Eigenschaften gebildet ist, z. B. aus Quarz, wie geschmolzener Silica.
  10. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) ein massiver Zylinder ist, und dass die Zylinderachse senkrecht zu der Achse des Speicherkörpers und parallel zu einer Tangente an die Peripherie des Speicherkörpers orientiert ist.
  11. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) massiv ist und zwei diametral gegenüberliegende und voneinander beabstandete konvexe zylindrische Oberflächenregionen (13, 14) mit zumindest substanziell demselben Krümmungsradius (x) und geraden parallelen Erzeugenden aufweist, und dass der Krümmungsradius (x) entweder gleich oder länger ist als der größte Abstand zwischen beiden Oberflächenregionen (13, 14).
  12. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) zumindest einen integrierten Montieransatz (9) aufweist.
  13. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die reflektierende Abtastzone (12) entweder durch einen Reflektor (M) konstituiert wird, welcher in die Peripherie des Speicherkörpers eingesetzt ist, oder durch die Peripherie des Speicherkörpers selbst.
  14. Fadenliefervorrichtung gemäß Anspruch 13, dadurch gekennzeichnet, dass die reflektierende Oberfläche der Abtastzone (12) in Umfangsrichtung des Speicherkörpers (3) konvex gekrümmt ist und eine gerade Erzeugende besitzt, die essentiell zu der Achse des Speicherkörpers parallel ist.
  15. Fadenliefervorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass die reflektierende Abtastzone (12) retroreflektierend ist.
  16. Elektro-optischer Fadensensor für eine Fadenverarbeitungsvorrichtung, insbesondere für eine Fadenliefervorrichtung (F), wobei der Fadensensor (S) eine Kombination aus einer Lichtquelle (E) und einem Empfänger (R) aufweist, der in enger Beziehung zu der Lichtquelle (E) angeordnet ist, und die Lichtquelle (E) einen dünnen Lichtstrahl (16) entlang eines Lichtpfades emittiert, der in eine beabstandete reflektierende Fadenabtastzone (12) gerichtet ist, und der Empfänger (R) auf von der reflektierenden Fadenabtastzone (12) reflektiertes Licht (21) mit einem Signal anspricht, dadurch gekennzeichnet, dass in dem Lichtpfad der Lichtquellen/Empfänger-Kombination ein solider transparenter optischer Lichtverteilungskörper (B) angeordnet ist, und dass der transparente Lichtverteilungskörper (B) so strukturiert ist, dass er zumindest einen durch den Lichtstrahl (16) an dem transparenten Lichtverteilungskörper (B) generierten, substanziell runden Lichtpunkt (17) in einen vorherrschend länglichen Lichtstreifen (18) auf der Abtastzone (12) aufspreizt, wobei die Ausdehnung (L) des Lichtstreifens (18) entlang seiner Längsachse größer ist als die Ausdehnung des Lichtpunkts (17) an dem transparenten Lichtverteilungskörper (B), und dass der transparente Lichtverteilungskörper (B) so angeordnet ist, dass die Längsachse des an der reflektierenden Abtastzone (12) generierten Lichtstreifens (18) substanziell parallel zu den Achsen der auf der Peripherie des Speicherkörpers getragenen Windungen des Fadens (Y) orientiert ist.
  17. Elektro-optischer Fadensensor gemäß Anspruch 16, dadurch gekennzeichnet, dass die Lichtquelle/Empfänger-Kombination ein elektronischer Modul (8) ist, der entweder aus einer infrarotemittierenden Diode oder einem Vertikalhohlraum-oberflächlich emittierenden Laser (VCSEL) als dem IR-Emitter und einem Fototransistor (24) als dem IR-Empfänger besteht, die beide Seite an Seite mit parallelen Achsen mit einem Zwischenabstand von weniger als 1,0 mm in einem Kunststoffgehäuse (22) montiert sind.
  18. Elektro-optischer Fadensensor gemäß Anspruch 16, dadurch gekennzeichnet, dass der transparente Lichtverteilungskörper (B) zwei diametral gegenüberliegende und voneinander beabstandete, konvexe zylindrische Oberflächenbereiche (13, 14) mit substanziell demselben Krümmungsradius (x) und geraden parallelen Erzeugenden aufweist, und dass der Krümmungsradius (x) gleich oder länger ist als der größte Abstand zwischen beiden Oberflächenregionen (13, 14).
EP07818840A 2006-11-10 2007-10-09 Optoelektrischer garnsensor Not-in-force EP2082085B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602412 2006-11-10
PCT/EP2007/008767 WO2008055571A1 (en) 2006-11-10 2007-10-09 Electro-optical yarn sensor

Publications (2)

Publication Number Publication Date
EP2082085A1 EP2082085A1 (de) 2009-07-29
EP2082085B1 true EP2082085B1 (de) 2010-12-15

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EP07818840A Not-in-force EP2082085B1 (de) 2006-11-10 2007-10-09 Optoelektrischer garnsensor

Country Status (6)

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EP (1) EP2082085B1 (de)
CN (1) CN101563489B (de)
AT (1) ATE491834T1 (de)
DE (1) DE602007011311D1 (de)
TW (1) TW200844285A (de)
WO (1) WO2008055571A1 (de)

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EP2907907A1 (de) * 2014-02-13 2015-08-19 L.G.L. Electronics S.p.A. Fadenzufuhrspeicher mit Drehtrommel und Garnabwickelsensor

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CN104843542A (zh) * 2014-02-13 2015-08-19 爱吉尔电子股份公司 带有旋转卷线轴和纱线缠开传感器的储存纱线馈送器
CN104843542B (zh) * 2014-02-13 2019-04-02 爱吉尔电子股份公司 带有旋转卷线轴和纱线缠开传感器的储存纱线馈送器

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WO2008055571A1 (en) 2008-05-15
DE602007011311D1 (de) 2011-01-27
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CN101563489B (zh) 2011-08-31
ATE491834T1 (de) 2011-01-15
EP2082085A1 (de) 2009-07-29

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