EP0868382B1 - Verfahren zum überwachen der abtastverhältnisse beim steuern einer fadenliefervorrichtung - Google Patents

Verfahren zum überwachen der abtastverhältnisse beim steuern einer fadenliefervorrichtung Download PDF

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Publication number
EP0868382B1
EP0868382B1 EP96942317A EP96942317A EP0868382B1 EP 0868382 B1 EP0868382 B1 EP 0868382B1 EP 96942317 A EP96942317 A EP 96942317A EP 96942317 A EP96942317 A EP 96942317A EP 0868382 B1 EP0868382 B1 EP 0868382B1
Authority
EP
European Patent Office
Prior art keywords
signal
threshold value
sensor device
circuit component
scanning
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
EP96942317A
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German (de)
English (en)
French (fr)
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EP0868382A1 (de
Inventor
Friedrich Weber
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.)
Memminger IRO GmbH
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Memminger IRO GmbH
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Filing date
Publication date
Application filed by Memminger IRO GmbH filed Critical Memminger IRO GmbH
Publication of EP0868382A1 publication Critical patent/EP0868382A1/de
Application granted granted Critical
Publication of EP0868382B1 publication Critical patent/EP0868382B1/de
Anticipated expiration legal-status Critical
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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
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/486—Monitoring reserve quantity
    • 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 method according to the preamble of claim 1 and a thread delivery device according to the preamble of claim 7.
  • the output signal of a sensor becomes a speed signal derived for the control circuit.
  • a certain quality of light transmission is required for the sensor device to work. Pollution when processing thread inevitable fluff accumulation worsens with increasing Operating time the light transmission quality.
  • the sensor device fails and to empty the storage area. This can lead to an error in the Guide the product in the textile machine by the thread delivery device with thread is supplied. It is therefore common for an operator to have experience based cleaning of the light transmission path, e.g. with compressed air or by wiping. However, these cleaning operations either done more often than necessary or it happens due to lack of care the operator occasionally to a fault.
  • the invention has for its object a method of the type mentioned and to specify a thread delivery device, with the structurally and technically simple and reliable such a deterioration in the sampling ratios is determined and displayed , which still allows proper functioning of the sensor device and itself without damage to the product of the textile machine supplied by the thread delivery device can be eliminated.
  • the method uses an object output signal generated for control purposes also for checking the quality of the sampling ratios, e.g. the quality of light transmission, used, with surface areas of the storage area and / or an object Thread can apply.
  • This does not require any noteworthy additional components in the sensor device or on the storage surface.
  • It will be the one for the function decisive sampling ratios of the sensor device, e.g. the light transmission quality, checked in the scanning zone, i.e. exactly where they are required for the function of the Sensor device for control, e.g. the drive motor, are crucial, and not at a location away from the scan zone.
  • the scanning conditions are checked exactly in the thread delivery device the location where the object is scanned, i.e. where the quality of the sampling ratio crucial for the correct functioning of the sensor device Has. Because the object output signal itself is additionally used as the basis for the test signal there are no additional sensor parts or tools on the storage area required. It will be the components that are already available for object scanning also used for the test routine. This also ensures that the sampling ratio only checked during working periods and that the operating personnel alarm signal prompting for fault elimination is generated, in which a Deterioration of the sampling ratio disturb the operation of the sensor device can, and not permanently, i.e. not during unimportant periods in which the sampling ratio anyway has no influence on the operation of the sensor device Has.
  • the structural features provided are both for a thread delivery device with storage area driven by the drive motor (rotary driven storage body) as well as for thread delivery devices with a storage area that is stationary during operation (stationary storage drum and rotary winding element) useful to be able to reliably determine when to rectify a fault is required.
  • a simple logical evaluation of the occurrence or non-occurrence of the two signals is carried out to prevent the Generate alarm signal at the right time and based on the right sampling condition.
  • the object output signal both the test signal and that usable for control purposes of the drive motor Speed signal formed.
  • the sampling ratios are only checked then when the drive motor is to be driven and the danger of emptying the storage space. Although from the Failure of the test signal the alarm signal is generated the speed signal is still for unobstructed use on.
  • the comparison is of the signals reliable because the output signal and that Test signal can be compared to a threshold value.
  • the higher threshold represents the just allowed Deterioration of the sampling ratios.
  • the output signal and the test signal are not only synchronous, but also in their decisive for the comparison with the threshold Signal level equal. Because the threshold for that Test signal is higher, the test signal remains off as soon as the just acceptable deterioration has occurred.
  • the Output signal is still present and can be used for control purposes use the predetermined manner. In the absence of the test signal, however, the alarm signal is generated.
  • the low threshold can be conveniently set to a stronger one Deterioration of the sampling ratios can be set at the proper functioning of the sensor device is not more is guaranteed. Should not respond to the alarm signal then the thread delivery device, and expediently also the textile machine supplied with thread, if there is also no output or speed signal be turned off to empty the storage area avoid.
  • both signals compared with the same threshold, but previously the signal level of the test signal changes so that off its comparison with the alarm threshold provides a precise statement the need for the alarm signal is obtained.
  • the method can be particularly useful in the case of optoelectronic and non-contact scanning in one with one opto-electronic sensor device equipped thread delivery device apply, according to claims 6 and 9, because between the signal level and the light transmission quality there is a predictable relationship.
  • this is the Object output signal representing the rotation speed of the drum used for the test routine, which is only due to the absence of the thread in the scanning zone Drum rests.
  • the alarm signal can then be generated simply and reliably, if the sampling ratios deteriorate accordingly to have. It is particularly useful that the operational security is only checked when the drive motor is driven and complements the thread supply. Because then there is the risk of emptying the storage area because the Limit of the thread supply depending on consumption behind the scanning zone has decreased. However, the drive motor no drive, no check is carried out. This is irrelevant, because then there will be a large thread supply anyway located on the storage area that extends into the scan zone enough. The troubleshooting or cleaning takes place expediently when the drive motor is at a standstill, so that the thread delivery device does not turn off needs and the production process of the textile machine does not have to be interrupted by the thread delivery device is supplied with thread.
  • test signal fails to appear as before applied output signal as speed signal for control considered and generates the alarm signal separately. It is advisable to use the already existing one Microprocessor of the control of the thread delivery device to use as linkage or monitoring device, because the microprocessor is usually one for this extra Program routine has sufficient capacity and only a software adjustment is required.
  • the device switches the thread delivery device via the shutdown element and expediently also on the textile machine supplied by it as soon as the opposite of the threshold value Speed signal fails because for some reason If the alarm signal occurs, the fault has not been rectified. This is a double security function.
  • the voltage divider generates the same signal level for the output signal and the test signal.
  • the two comparators set the two Signal level against two different threshold values. This means that what may be required for the control Speed signal even when a just permissible is reached Deterioration of the sampling ratio is still present, although the test signal has dropped and the alarm signal is produced.
  • the signal level for that is already in the voltage divider Test signal changed compared to the signal level of the output signal. From the output signal this can still be done if necessary speed signal required for control derived be while while reaching a just allowed Deterioration of the sampling ratio the test signal drops and the alarm signal is generated.
  • a thread delivery device F according to FIG. 1, in particular one Thread delivery device for a knitting machine, has a housing 13 for an electric drive motor 15 with which A drum 1 can be driven in rotation via a shaft 16.
  • an opto-electronic Sensor device 7 with (Fig. 2) several in the circumferential direction spaced apart on a scanning zone 12 (dash-dotted lines) aligned sensors S, e.g. adjustable, arranged parallel to the drum axis.
  • the sensor device 7 is via a control circuit L with a Control C of the drive motor 15 connected. Every sensor can, for example, from its own light source, e.g. For infrared light, and a receiver, e.g. a photodiode, exist that respond to reflection light.
  • the drum 1 defines a storage area 2 for a thread supply 5, which consists of turns 6 of a thread Y, the from the textile machine (not shown) (e.g. knitting machine) subtracted from the drum 1 as required becomes.
  • the thread Y is in an upper region of the drum 1 1 and wound up by the rotation of the drum 1, the drive motor 15 being controlled so that despite varying consumption of the Y thread, the thread supply 5 tried to maintain a size with which the thread supply 5 extends into the scanning zone 12.
  • the drive motor 15 Located in the scan zone 12 thread before, the drive motor 15 is stopped or delayed. If there is no thread in the scanning zone 12 before, then the drive motor 15 is driven or accelerated.
  • the drive speed is controlled via control C. of the drive motor 15 approximately the thread consumption customized.
  • the drum 1 can be designed as a rod cage with longitudinal rods R, which are separated by spaces Z from each other are separated. Instead of continuous spaces Z could also open longitudinal grooves in the drum 1 be provided. It is also conceivable to have a drum 1 smooth surface to use, the alternating in the circumferential direction Surface areas A, B with each other clearly various, e.g. optical, scanning properties. In the embodiment shown, the bars define R and the spaces Z first and second peripheral sections 8, 9 with clearly different scanning properties for sensors S of sensor device 7. Distribution of Surface areas A, B should be regular in the circumferential direction his. In the sensor device are in this embodiment three sensors S spaced apart in the circumferential direction, that at least one sensor S has a first circumferential section 8 and at least one second sensor S simultaneously a second one Circumferential section 9 scans.
  • the spokes 18 through the gaps Z extend up to a rotary bearing 17 on the shaft 16.
  • the pivot bearing 17 and the spoke star 19 are inclined to the axis 3 of the drum 1. Since the pivot bearing 17 on a Sleeve 17a is arranged to rotate with the Shaft 16 is prevented, the spoke star 19 pushes the thread supply 5 axially forward towards the scanning zone 12.
  • the feed effect could be a conical one Formation of the drum 1 can be achieved on the thread feed side.
  • the sensors S are housed together in a housing 30.
  • Translucent cover plates 31 or one for all Sensors S common cover window protect sensors S against direct pollution.
  • Fig. 3 schematically illustrates a possible block diagram Embodiment of the control circuit L, with the drive control signals for the drive motor 15 from the output signal of the sensor device 7 or the output signals of the sensors S are generated.
  • the sensors S consist of transmitters D7, D8 and D9 and receiver elements T1, T2 and T3, which preferably work with infrared light.
  • the sensors, the receivers and operational amplifiers 20, 21 and 22 cooperating with them connected together to a constant voltage source.
  • the received infrared radiation generates a photo current, which is the voltage across the working resistors influenced.
  • the voltages are amplified in the operational amplifiers 20, 21 and 22.
  • the outputs of the operational amplifiers 20, 21 and 22 are via a diode network connected to a central load resistor 40.
  • the diodes are like this polarized that the positive voltages at the upper point of the Working resistance 40 and the negative voltages at the base of the Working resistance 40 arrive.
  • a maximum is thus formed at the working resistor 40 Differential voltage between the maximum highest positive voltage and the maximum lowest negative voltage.
  • the positive value is about one Amplifier 38, the negative value, however, via an amplifier 39 to a differential amplifier 41 headed.
  • the voltage at the output of differential amplifier 41 corresponds to the proportional portion of the thread supply on the storage area.
  • the Voltage at the output of differential amplifier 41 is via a diode and a resistor network fed to a comparator 43. On a potentiometer 44 leaves the nominal value of the thread supply is set.
  • the comparator 43 provides control of the drive motor 15 the commands: run or stop.
  • the output signal of a sensor element S (D7, T1) is on the operational amplifier 20 additionally tapped over 14 and a circuit part D and a parallel circuit part E fed.
  • a line 24 leads from point 23 to an input of a Comparator 26, the other input of which is adjustable Threshold element 27 is connected.
  • the output of the comparator 26 is to a linkage or monitoring device V connected, preferably in a microprocessor M is integrated.
  • a warning signal generator is connected to it 4 and possibly a shutdown element 11.
  • the parallel circuit part E branches at point 23 with a line 25 from connected to an input of a second comparator 28 is the other entrance with a second Threshold element 29 is connected.
  • the exit of the second Comparator 28 is also connected to device V.
  • the threshold value element 27 is at a low threshold value which corresponds, for example, to a signal level, below that, e.g. due to deteriorated light transmission quality, the sensor device 7 is no longer functional is.
  • the threshold value element 29, however, is on one higher threshold value set, which is just a permissible Represents deterioration in light transmission quality, where the sensor device is still working properly can, an elimination of the light transmission quality
  • a test signal becomes synchronous and essentially at the same time and formed with the same signal level as the output signal.
  • the threshold value element 29 has a higher threshold value is set as the threshold 27, it remains Test signal on the device V off as soon as its level below the threshold drops.
  • the signal generator 4 activates, preferably, an optical one or emit an acoustic signal. Will the pollution not eliminated, then the microprocessor M can fail also activate the shutdown element 11 of the speed signal and turn off the thread delivery device and the textile machine, to avoid emptying the drum 1 if necessary.
  • Fig. 4 illustrates a variation of the circuit part D and of the parallel circuit part E.
  • line 14 is a Voltage divider provided from resistors 32, 33, 34. in the Point 35 between resistors 32 and 33 branches the line 24 to an input of the comparator 26. From point 37 however, the line branches between resistors 33 and 34 25 to an input of the second comparator 28.
  • the Signal level (voltage level) from the output signal at the point 37 (test signal) is lower than at point 35.
  • the respective other input of the first and second comparators 26, 28 is connected to a common threshold element 36 which is set to a certain threshold (a reference voltage).
  • the threshold 36 is exactly on point set, at which the pollution just barely permissible, but too high for the signal level of the test signal Limit reached.
  • the comparator 28 switches at a higher threshold than that Comparator 26. If the sensor device is contaminated accordingly, so the comparator 28 can no longer switch through. By checking the equivalency of the output voltages of the comparators 26, 28 is determined in the microprocessor M that a Warning signal is to be issued. The warning signal generator 4 is activated.
  • FIG. 5 illustrates the object output signal 38 'in a U / t diagram. in line 14, as determined by sensor S, D7, T1 depending on the passage of the circumferential sections 8, 9 or of the different surface areas A, B is generated.
  • the light transmission quality is at the first two signal levels still flawless.
  • the quality of the Light transmission off. 3 - as in the diagram 5A - a signal 39 'on.
  • the one set on the threshold 27 Threshold is indicated by U1.
  • the comparator 26 results a signal sequence C according to FIG. 5C.
  • the comparator 28 results however, a signal sequence G according to FIG. 5C.
  • the signal sequence is G not available anymore.
  • a check for the equality of the signal sequences results in a logical one Signal sequence H in Fig. 5C.
  • the microprocessor M activates this Doubletree 4.
  • the threshold value U2 represents a just acceptable deterioration of the Sampling ratios, i.e. the light transmission quality at which the sensor device 7 still working properly, as indicated by the one in Fig. 5A below signal 39 'still present after time X and signal sequence C in FIG. 5C is made clear. It should be noted that the light transmission quality usually deteriorates within a significantly longer period of time than it can be derived from FIGS. 5, 5A, 5B, 5C. These figures are in terms of time To be better understood as a schematic only.
  • the diagram according to FIG. 5B belongs to the variant according to FIG. 4.
  • a signal 39 "corresponding to signal 39 'of FIG. 5A is present.
  • the threshold U1 corresponds to the threshold value U1 of FIG. 5A. It can be seen at the top in FIG. 5B that how due to the voltage divider the signal level from the object output signal 38 'derived test signal 40 "are respectively lower than the signal levels of signal 39 ", but the same for test signal 40" Threshold value U1 is taken into account as for signal 39 ". The first three signal levels of the test signal 40 "are still high enough to close the second comparator 28 happen. However, the fourth signal level is lower than the threshold value U1, so that then the test signal 40 "does not appear at the logic device V and the warning signal is produced.
  • An antivalence control device is used to evaluate the components Matching the test signal with the speed signal created.
  • This antivalence control device can be easily implemented in the microprocessor M on the software side. The quality of the light transmission is only checked if if the drive motor is driven to supplement the thread supply, because at idle drum anyway the sensor device only scans the thread and the reflective rods R does not see or the quality of the reflection light transmission cannot judge reliably.
  • the method can also be used with other physical scanning principles, e.g. when scanning using sound, induction, magnetism, capacitance or the like.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP96942317A 1995-12-08 1996-12-03 Verfahren zum überwachen der abtastverhältnisse beim steuern einer fadenliefervorrichtung Expired - Lifetime EP0868382B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19545891 1995-12-08
DE19545891A DE19545891A1 (de) 1995-12-08 1995-12-08 Verfahren zum Überwachen der Abtastverhältnisse beim Steuern einer Fadenliefervorrichtung
PCT/EP1996/005383 WO1997021620A1 (de) 1995-12-08 1996-12-03 Verfahren zum überwachen der abtastverhältnisse beim steuern einer fadenliefervorrichtung

Publications (2)

Publication Number Publication Date
EP0868382A1 EP0868382A1 (de) 1998-10-07
EP0868382B1 true EP0868382B1 (de) 2000-05-03

Family

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Application Number Title Priority Date Filing Date
EP96942317A Expired - Lifetime EP0868382B1 (de) 1995-12-08 1996-12-03 Verfahren zum überwachen der abtastverhältnisse beim steuern einer fadenliefervorrichtung

Country Status (7)

Country Link
US (1) US6125663A (zh)
EP (1) EP0868382B1 (zh)
KR (1) KR100303145B1 (zh)
CN (1) CN1103734C (zh)
DE (2) DE19545891A1 (zh)
TW (1) TW308614B (zh)
WO (1) WO1997021620A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007010417A1 (de) 2007-03-01 2008-09-04 Memminger-Iro Gmbh Selbstreinigende Nadelüberwachungseinrichtung

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WO1998033812A1 (en) * 1997-02-05 1998-08-06 Brigham And Women's Hospital, Inc. Mast cell protease peptide inhibitors
KR100493986B1 (ko) * 2001-09-20 2005-06-27 학교법인 두원학원 방사상태 제어시스템의 제어방법
DE10153856A1 (de) * 2001-11-02 2003-05-15 Iropa Ag Fadenliefervorrichtung und Verfahren zur Fadenlieferung
DE10159227A1 (de) * 2001-12-03 2003-06-18 Iropa Ag Fadenliefergerät
CN1307425C (zh) * 2003-03-13 2007-03-28 鸿富锦精密工业（深圳）有限公司 老化台车测试监控改良装置
CN102677384A (zh) * 2012-06-08 2012-09-19 慈溪太阳洲纺织科技有限公司 储纱器
CN102704165A (zh) * 2012-06-08 2012-10-03 慈溪太阳洲纺织科技有限公司 一种控制储纱器上输线轮运动状态的方法
CN102965799B (zh) * 2012-12-21 2013-11-06 慈溪太阳洲纺织科技有限公司 储纬器
CN103225166A (zh) * 2013-04-23 2013-07-31 慈溪太阳洲纺织科技有限公司 圆桶形针织机和圆桶形针织机上的织针损坏监测方法
EP2907908B1 (en) * 2014-02-13 2016-06-22 L.G.L. Electronics S.p.A. Yarn-unwinding sensor for storage yarn feeders with rotary drum
CN103832879A (zh) * 2014-02-28 2014-06-04 江阴市华方新技术科研有限公司 一种储纱装置
USD931740S1 (en) * 2019-09-06 2021-09-28 Saurer Technologies GmbH & Co. KG Quality sensor

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Publication number Priority date Publication date Assignee Title
DE102007010417A1 (de) 2007-03-01 2008-09-04 Memminger-Iro Gmbh Selbstreinigende Nadelüberwachungseinrichtung

Also Published As

Publication number Publication date
US6125663A (en) 2000-10-03
WO1997021620A1 (de) 1997-06-19
DE19545891A1 (de) 1997-06-12
CN1103734C (zh) 2003-03-26
CN1207083A (zh) 1999-02-03
EP0868382A1 (de) 1998-10-07
DE59605149D1 (de) 2000-06-08
KR19990071981A (ko) 1999-09-27
TW308614B (zh) 1997-06-21
KR100303145B1 (ko) 2001-12-12

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