EP2394944A1 - Dispositif de capteur de poussière pour fils et peluches - Google Patents

Dispositif de capteur de poussière pour fils et peluches Download PDF

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Publication number
EP2394944A1
EP2394944A1 EP10005999A EP10005999A EP2394944A1 EP 2394944 A1 EP2394944 A1 EP 2394944A1 EP 10005999 A EP10005999 A EP 10005999A EP 10005999 A EP10005999 A EP 10005999A EP 2394944 A1 EP2394944 A1 EP 2394944A1
Authority
EP
European Patent Office
Prior art keywords
sensor
lint
comb
dust
thread
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.)
Withdrawn
Application number
EP10005999A
Other languages
German (de)
English (en)
Inventor
Steffen Dr. Heinz
Udo Neumann
Wolfgang Dr. Schäfer
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.)
Sentex Chemnitz GmbH
Original Assignee
Sentex Chemnitz GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sentex Chemnitz GmbH filed Critical Sentex Chemnitz GmbH
Priority to EP10005999A priority Critical patent/EP2394944A1/fr
Publication of EP2394944A1 publication Critical patent/EP2394944A1/fr
Withdrawn legal-status Critical Current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
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B65H61/005—Applications of devices for metering predetermined lengths of running material for measuring speed of running 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
    • 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
    • B65H63/064—Electronic slub detector using capacitor sensing means, i.e. the defect signal is a variation of impedance
    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/3073—Detection means therefor
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • 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 invention relates to a thread-fluff-dust sensor arrangement, in particular for use in weaving machines for monitoring the thread arrival and / or in filter systems for residual dust monitoring.
  • the state of the art for detecting the thread arrival is the use of an optical light barrier system.
  • the task of the light barrier is to control the thread arrival, i. the recognition of the exact time of yarn arrival at a defined location.
  • the sensor signal is part of the weaving process and triggers a stop command of the thread transport.
  • the disadvantage is the fact that no simultaneous precise speed measurement can be performed.
  • the main disadvantage is that the mounting of the light barrier system requires an inevitable division of the reed of the loom, which is associated with considerable overhead.
  • a dust particle moving past the sensor, a strip conductor arrangement called the sensor comb only generates a short pulse train. From this short pulse train of a single particle, the fundamental frequency can hardly and in particular can not be determined in real time. Certain materials will cause faulty sensor messages. The cause of these faults are lint, small particles of dust that move in the reed channel and generate a "sensor signal", thus erroneously signaling the arrival.
  • the object of the invention is to develop a thread-fluff-dust sensor arrangement, which allows the detection of the charge of passing yarns, dust and / or lint particles without contact, which can calculate speed by means of the described method and beyond a fast, ie made in a few milliseconds, distinction between thread and lint (dust particles) allowed.
  • the advantage of the invention is that the thread fluff dust sensor arrangement according to the invention can also be used for dusty environments and / or dust-generating materials and that, in addition to the measurement of the speed, detection of further interference states, e.g. in web processes, e.g. to distinguish between thread and lint, or to determine a disturbed threadline (referred to as ball formation) or a thread breakage is possible.
  • the thread-lint-dust sensor arrangement is also suitable for controlling the dust content in flowing gases. Compared to conventional methods, the speed of the dust particles and thus the gas flow velocity can be measured simultaneously.
  • basically known stripline arrangements serve as charge sensors.
  • the effect of the electric field between particles and the individual strip conductors of the sensor comb results in a charge shift (influence) in the sensor comb.
  • this charge shift generates a charge spectrum in the time domain.
  • the arrangement is also suitable for the detection of dust particles in flowing gases.
  • the double comb arrangement according to the invention is suitable for this purpose.
  • FIG. 2 shows the block diagram of a thread-lint-dust sensor assembly. It consists of at least one double comb arrangement 1 with two sensor combs K1 and K2 arranged one behind the other, wherein a preamplifier 2 is assigned to each sensor comb K1 and K2.
  • the two sensor combs K1 and K2 serve for charge detection by means of influence.
  • the double comb arrangement 1 is connected via an analog part 3, a digital part 4 downstream.
  • the comb structures consist of two nested sensor combs K1 and K2.
  • the two preamplifiers 2 e.g., TLC072DGN
  • the analog part 3 consists of two instrumentation amplifiers 5, e.g. from two instrumentation amplifiers of type INA2128AU with programmable potentiometers for setting the amplification and the switching thresholds of two Schmitt triggers 6.
  • the core of the digital part 4 forms, for example, a microprocessor 7, for example one of the type ATMega324p, which is connected to a display 8, eg an LCD display. It serves the signal evaluation.
  • a microprocessor 7 For the communication with the microprocessor 7, an interface 9, for example an RS-232 interface, and a programming input 10 are arranged.
  • the entire electronics can also be realized with the help of one or more ASICs (Application-Specific Integrated Circuit).
  • ASICs Application-Specific Integrated Circuit
  • the two sensor combs K1 and K2, FIG. 3 lie in this embodiment in the direction of movement of the objects to be detected one behind the other.
  • the front-end electronics for signal evaluation and processing must be mounted relatively close to the sensor combs K1 and K2.
  • the sensor arrangement or the double comb arrangement 1 is fitted from above and at any point in the thread channel, the sensor combs K1 and K2 may be strip-shaped or cylindrical.
  • FIG. 3 are three variants of the sensor combs K1 and K2, which are similar in a double comb assembly 1, and the associated preamplifier electronics.
  • both the distance and the width of the strips of both sensor combs K1 and K2 and the spacing and the width of the strips within a sensor comb K1 or K2 can vary.
  • threshold value switch To distinguish between thread and lint the evaluation of the charge signals by means of threshold value switch (comparator) is sufficient. The difference between “signal” and “no signal” is evaluated.
  • the thresholds for the "signal” and “no signal” decision are variable and programmable in the described embodiment.
  • the evaluation of the charge spectrum is omitted for the time being, but this can be done in addition. The omission of the spectrum evaluation significantly reduces the circuit complexity for the application.
  • the thread fluff dust sensor arrangement according to the invention offers several advantages over the prior art.
  • the comb assembly is relatively insensitive to dirt accumulation and provides a simultaneous uptake of gas velocity. This can be done on the one hand with the help of time measurement by the sensor combs and evaluation and on the other hand by evaluation of the charge spectrum.
  • the combination of particle number and velocity measurement and a database with regard to the relationship between charge spectrum and particle size / particle mass make it possible to directly deduce the dust content per unit volume.
  • FIG. 4 is the basic structure of a dust filter with a thread-lint-dust sensor arrangement shown.
  • a filter cartridge 11 of the dust filter filters particles from a dirty air stream 12 from the raw gas side to the clean gas side of the dust filter flows through.
  • the dust particles still contained in the clean air stream 13 on the clean gas side generate charge impulses on the residual dust sensor (as described above with double comb arrangement 1).
  • the particle velocity and thus the air velocity are determined by the method described above. With a low particle concentration, the velocity determination takes place with the aid of the double comb arrangement 1; with a higher particle concentration, the time domain frequency domain transformation from the charge spectrum can be used.
  • the residual dust control has been required by law in the wood processing industry for air returning filter systems since 2008.
  • the monitoring obligation for other industries is expected.
  • Various sensor principles are suitable for controlling the dust content.
  • a fundamental distinction can be made in optical methods and methods with charge evaluation. In the optical methods scattered light and transmitted light detectors are used. They achieve high precision at a high cost.
  • the monitoring of the particle and dust content of the clean gas side of a ventilation or filter system is preferably carried out by means of the triboelectric effect.
  • the use of triboelectric sensors is inexpensive and state of the art.
  • a charge exchange between particle and sensor takes place.
  • the sensor thus records the particle contact on a sensor rod made of metal by impulses. It creates a count pulse sequence.
  • a relation to the residual dust content (unit mg / m 3 ) can be produced only indirectly. This requires additional information, namely the volume flow of the air (flow velocity and tube volume) and the mean mass of the particles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Sampling And Sample Adjustment (AREA)
EP10005999A 2010-06-10 2010-06-10 Dispositif de capteur de poussière pour fils et peluches Withdrawn EP2394944A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10005999A EP2394944A1 (fr) 2010-06-10 2010-06-10 Dispositif de capteur de poussière pour fils et peluches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10005999A EP2394944A1 (fr) 2010-06-10 2010-06-10 Dispositif de capteur de poussière pour fils et peluches

Publications (1)

Publication Number Publication Date
EP2394944A1 true EP2394944A1 (fr) 2011-12-14

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ID=43012793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10005999A Withdrawn EP2394944A1 (fr) 2010-06-10 2010-06-10 Dispositif de capteur de poussière pour fils et peluches

Country Status (1)

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EP (1) EP2394944A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192106A (zh) * 2014-08-08 2016-12-07 索若德国两合股份有限公司 多站式纺织机
WO2017174381A1 (fr) * 2016-04-08 2017-10-12 Koninklijke Philips N.V. Capteur de qualité de fibre
CN110670214A (zh) * 2019-09-19 2020-01-10 苏州伟创电气科技股份有限公司 一种探纬器及喷水织机系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912510A1 (de) * 1969-03-12 1970-09-24 Glanzstoff Ag Verfahren und Vorrichtung zur beruehrungslosen Messung von Faden- oder Garngeschwindigkeiten
US3927356A (en) * 1973-07-13 1975-12-16 Nat Res Dev Yarn detection devices
CH596344A5 (fr) * 1975-09-29 1978-03-15 Luwa Ag
GB1539541A (en) * 1975-03-21 1979-01-31 Ltg Lufttechnische Gmbh Control apparatus in textile machines
DE9216181U1 (de) * 1992-11-27 1993-02-18 Otto Stüber GmbH & Co KG, 73266 Bissingen Kapazitiver elektronischer Fadenwächter mit Dual-Elektroden
WO2010028642A1 (fr) * 2008-09-15 2010-03-18 Neumann Elektronik Gmbh Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé
DE102009018720B3 (de) * 2009-04-27 2010-09-16 Neumann Elektrotechnik Gmbh Faden-Flusen-Staubsensor-Anordnung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1912510A1 (de) * 1969-03-12 1970-09-24 Glanzstoff Ag Verfahren und Vorrichtung zur beruehrungslosen Messung von Faden- oder Garngeschwindigkeiten
US3927356A (en) * 1973-07-13 1975-12-16 Nat Res Dev Yarn detection devices
GB1539541A (en) * 1975-03-21 1979-01-31 Ltg Lufttechnische Gmbh Control apparatus in textile machines
CH596344A5 (fr) * 1975-09-29 1978-03-15 Luwa Ag
DE9216181U1 (de) * 1992-11-27 1993-02-18 Otto Stüber GmbH & Co KG, 73266 Bissingen Kapazitiver elektronischer Fadenwächter mit Dual-Elektroden
WO2010028642A1 (fr) * 2008-09-15 2010-03-18 Neumann Elektronik Gmbh Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé
DE102009018720B3 (de) * 2009-04-27 2010-09-16 Neumann Elektrotechnik Gmbh Faden-Flusen-Staubsensor-Anordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192106A (zh) * 2014-08-08 2016-12-07 索若德国两合股份有限公司 多站式纺织机
CN106192106B (zh) * 2014-08-08 2019-02-12 索若德国两合股份有限公司 多站式纺织机
WO2017174381A1 (fr) * 2016-04-08 2017-10-12 Koninklijke Philips N.V. Capteur de qualité de fibre
CN110670214A (zh) * 2019-09-19 2020-01-10 苏州伟创电气科技股份有限公司 一种探纬器及喷水织机系统
CN110670214B (zh) * 2019-09-19 2021-04-27 苏州伟创电气科技股份有限公司 一种探纬器及喷水织机系统

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