EP1519178B1 - Méthode et dispositif pour détecter les mouvements de balourd d'un tambour de machine à laver. - Google Patents

Méthode et dispositif pour détecter les mouvements de balourd d'un tambour de machine à laver. Download PDF

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Publication number
EP1519178B1
EP1519178B1 EP04022474A EP04022474A EP1519178B1 EP 1519178 B1 EP1519178 B1 EP 1519178B1 EP 04022474 A EP04022474 A EP 04022474A EP 04022474 A EP04022474 A EP 04022474A EP 1519178 B1 EP1519178 B1 EP 1519178B1
Authority
EP
European Patent Office
Prior art keywords
actuator
axis
drum
rotation
sensing element
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
EP04022474A
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German (de)
English (en)
Other versions
EP1519178A1 (fr
Inventor
Martin Weinmann
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.)
Diehl AKO Stiftung and Co KG
Original Assignee
Diehl AKO Stiftung and Co KG
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.)
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Publication date
Priority claimed from DE10345591A external-priority patent/DE10345591B3/de
Application filed by Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Publication of EP1519178A1 publication Critical patent/EP1519178A1/fr
Application granted granted Critical
Publication of EP1519178B1 publication Critical patent/EP1519178B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/16—Imbalance
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/26—Imbalance; Noise level

Definitions

  • the invention relates to methods and a device according to the preamble of the independent claims.
  • a method and a device for detecting unbalance-dependent movement phenomena in a laundry drum by means of rotational speed measurement are known, for example, from EP 0 349 798 B1.
  • a transmission driven by a controllable in its speed electric motor, which is equipped with a tachogenerator as a rotary encoder.
  • a tachogenerator as a rotary encoder.
  • Whose rotor rotates as an actuator torsionally rigid with the motor shaft, while its stator is fixed as a transducer rigidly on the motor housing, which in turn is mounted on the tub, within which rotates the drum mounted in the tub end wall.
  • the output voltage or the output frequency of the rotary encoder is a measure of the instantaneous engine speed and thus also for the current, the engine speed over-reduced, drum speed.
  • Such movements can not be detected with a sensor whose transducer is rigidly connected to the tub, since they are not centripetal to the axis of rotation oriented about the inertia axis of the drum rotation, but on unbalanced oscillations around the Y and about the Z axis of a spatially Cartesian coordinate system based, if its X-axis is the axis of rotation of the laundry drum.
  • Such unbalanced vibrations in addition to those about the X-axis occur in particular when the laundry unevenly distributed in the axial direction within the drum. This occurs, for example, in higher-priced machines, in which the axis of the laundry drum runs inclined backwards from the engagement opening for easier viewing and for greater ease of loading and unloading.
  • the present invention is based on the technical problem to detect in the loaded laundry drum and those imbalances that lead to Taumelbe screw screw the drum, which are not detectable due to speed fluctuations around the drum axis, but also to avoid critical unbalance induced deflections of the tub over the drum drive control technology counteracted should be able to.
  • unbalanced vibrations of the drum can be detected, which can not be detected with a coupled in a conventional manner rigidly to the machine encoder.
  • the object of the present invention is to further improve such a method and such a device.
  • Drum becomes more likely. This can lead to wobble in the high-speed drum rotation, which are not detectable by conventional encoder systems with their rigid device connection.
  • the two angular accelerations must be detected around the inertia axes orthogonal to the main mass-axis of inertia X.
  • the drum speed indicating output signal of the rotary encoder undergoes a dependent of the additional pitching or yawing movements of the laundry drum variation, because the respective sensor of the encoder according to the invention is no longer rigidly fixed, but in the transverse plane to the drum axis of rotation under the influence of the tumbling forces is displaceable against the elastic force of a return device.
  • Two in this transverse plane orthogonal to each other given inventive displacement capabilities of encoder receivers thus provide separate influences on the results of the current speed measurements on the drum, namely in accordance with the pitch and the yaw stresses of the laundry drum.
  • the inventive detection of tumbling movements by the displaceable at the rotary encoder pickup the current speed measurement fluctuations is applicable not only for horizontal or slightly inclined relative to the horizontal axis of rotation of the drum, but at any spatial angular position of the axis of rotation and therefore also with vertical X or axis of rotation the drum, as in the case of the so-called actuator washing machines.
  • a laundry drum 11 of a household washing machine or a Moschiescheschleuder is sketched in front view against their rear side opposite the loading opening, which is rotatably mounted here in the rear wall of a cubic outlined tub 12.
  • the tub 12 is vibratable, but elastically damped, suspended in a machine housing 13.
  • a directly or getrieb coupled to the laundry drum 11 motor for the rotational movement of the laundry drum 11 to their example, with respect to the horizontal inclined axis of rotation 14 is omitted in the simplified representations of the drawing.
  • 1 is a transmission 15 for the rotationally rigid coupling of the permanent magnetic rotor of a tachogeneratorischen rotary encoder 18 to the electric motor driven laundry drum 11.
  • the axis of rotation 20 of the rotor in the rotary encoder 18 is oriented substantially parallel to the axis of rotation 14 of the laundry drum 11, which in turn spatial Cartesian coordinate system (as indicated in Fig. 1) is defined as X-axis. This is the main mass axis of inertia of the rotating system of the loaded Laundry drum 11 for the case of an approximately axially symmetric distributed to its center mass assignment.
  • the rotor of the rotary encoder 18 is rotatably mounted on the tub 12 via its stator. Driven by the drum 11, the rotor rotates within the coil system of its stator. The rotor is thus the actuator 16 and the coil system of the transducer 17 of the encoder 18.
  • the supplies as tachogenerator a speed-dependent output voltage or frequency generator as a speed-dependent pulse train to an evaluation circuit may be provided separately, in practice but preferably is realized with in the microprocessor control of the drive motor for the operation of the laundry drum 11.
  • this rotary encoder 18 lies in the fact that its transducer 17 in the form of the stator is no longer rotationally fixed to the tub 12 or other drum member 11 rotatably supporting device part is fixed, but is pivotable about an elastic return device 19 about the axis of rotation 20 of the actuator 16, wherein the maximum pivotable deflection alternatively or additionally to the elastic return device 19 by two (not shown) stops (one per pivoting direction) may be limited.
  • the transducer 17 in this case has an eccentric mass distribution with respect to its axis of rotation 20, which is illustrated in the sketch by an eccentric additional mass 21 applied externally locally.
  • a drive of the unbalanced laundry drum 11 with a moderate speed of rotation leads to relatively long period of the fluctuating output signals of the encoder 18, which can be eliminated with respect to possible distortions due to slight oscillations of the transducer 17 metrologically, insofar as they are not completely negligible in practice.
  • this relative speed error increases with increasing speed of the drum 11 due their then stronger tendency to tumble, which is why at the high speeds of the spin operation at the output of the encoder 18 due to correspondingly strong taumel employmenter displacement of the transducer 17, an evaluable large speed error occurs.
  • the laundry drum 11 is equipped directly with the actuator 16 of the rotary encoder 18, so that the drum rotation axis 14 and the actuator rotation axis 20 coincide with the main mass-axis of inertia X.
  • a pickup 17 ' is here rigidly mounted on the tub or housing (12 or 13 in Fig. 1).
  • the actuator 16 rotating with the laundry drum 11 has a lapping structure, such as (in the enlargement of Fig. 2 indicated) in the form of uniformly successive slots in the duty cycle "1" or Aperture holes of, for example, approximately rectangular cross-section.
  • the gap of this actuator 16 is overlapped in this example case along its outer edge of a forked light barrier as the transducer 17 'U-shaped.
  • the rotary encoder 18 responds because the sensor 17 'is switched through.
  • the repetition frequency of the pulses thus triggered by the light barrier is a measure of the instantaneous rotational speed of the laundry drum 11 about its axis 14.
  • this actuator 16 is overlapped in the form of rotating with the laundry drum 11 void ring of a pickup 17, which is indeed mounted on the tub 12 and housing 13, but not rigidly fixed, sondem again against a return device 19 in and against the direction of movement Actuator 16 to a structurally predetermined degree displaced.
  • the maximum displacement of the pickup 17 may be limited alternatively or in addition to the restoring device 19 by one or two (not shown for clarity) stops (one per movement direction of the pickup 17).
  • This variable pulse frequency difference is a measure of the yawing motion of the laundry drum 11, ie its deflection about the vertical Y-axis in the horizontal Z-direction transverse to the X-direction, the axis of rotation 14, which is assumed to be substantially horizontal for these embodiments.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Testing Of Balance (AREA)
  • Centrifugal Separators (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (12)

  1. Procédé pour détecter des mouvements de balourd d'un tambour de machine à laver en mesurant son mouvement de rotation, avec lequel des accélérations angulaires produites autour d'un axe d'inertie transversal par rapport à l'axe de rotation du tambour de machine à laver sont détectées par le biais d'un décalage de l'enregistreur ou de l'actionneur d'un système de codeur rotatif sous la forme d'une fluctuation dans la valeur mesurée de la vitesse de rotation, caractérisé en ce que le décalage de l'enregistreur ou de l'actionneur du système de codeur rotatif est dirigé contre une force de rappel élastique de manière tangentielle ou périphérique à l'axe de rotation de l'actionneur.
  2. Procédé selon la revendication 1, caractérisé en ce que le décalage de l'enregistreur ou de l'actionneur du système de codeur rotatif s'effectue en plus contre au moins une, de préférence deux butées.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la fluctuation mesurable du fait du décalage est détectée dans le signal de sortie du codeur rotatif sous la forme d'une mesure de la nutation résultant des contraintes superposées de tangage ou de lacet du tambour de machine à laver.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les variations relatives de la vitesse de rotation sont détectées dans des directions orthogonales l'une à l'autre transversalement à l'axe de rotation du tambour de machine à laver.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que la variation de la vitesse de rotation dépendante du décalage est comparée avec le signal de vitesse de rotation provenant d'un autre codeur rotatif qui est fixé à demeure ou qui peut lui aussi être décalé par effet élastique par rapport à un autre axe d'inertie.
  6. Dispositif pour détecter des mouvements de balourd d'un tambour de machine à laver (11), lequel est équipé d'un codeur rotatif (18) servant d'instrument de mesure de la vitesse de rotation et dont une composante de l'actionneur (16) qui tourne avec le tambour de machine à laver (11) ou de l'enregistreur (17) fixe sur l'appareil peut être décalée par rapport à l'autre composante dans le même sens ou en sens inverse de la rotation de l'actionneur, caractérisé en ce que le dispositif présente un dispositif de rappel élastique, l'une des composantes de l'actionneur (16) ou de l'enregistreur (17) pouvant être décalée par rapport à l'autre composante de manière tangentielle ou périphérique à l'axe de rotation de l'actionneur contre ce dispositif de rappel élastique (19).
  7. Dispositif selon la revendication 6, caractérisé en ce que l'actionneur (16) ou l'enregistreur (17) peuvent en plus être décalés contre au moins une, de préférence deux butées.
  8. Dispositif selon la revendication 7, caractérisé en ce que le codeur rotatif (18) est réalisé sous la forme d'un générateur tachymétrique délivrant une tension ou délivrant une fréquence dont le rotor à magnétisme permanent fait office d'actionneur (16) qui tourne dans le système des bobines de stator d'un enregistreur (17), lequel présente une distribution excentrique des masses par rapport à son axe de rotation et peut exercer une torsion par rapport au mouvement de l'actionneur (16) contre la force de rappel élastique du dispositif de rappel (19) et/ou contre la ou les butées.
  9. Dispositif selon la revendication 7, caractérisé en ce que le codeur rotatif (18) prévu est un codeur à impulsions avec un modèle d'impulsions couplé de manière rotative avec le tambour de machine à laver (11) et faisant office d'actionneur (16), dont l'enregistreur (17) peut être décalé dans le sens tangentiel par rapport au mouvement de l'actionneur (16) contre la force de rappel élastique du dispositif de rappel (19) et/ou contre la ou les butées, un codeur rotatif optoélectronique (18) muni d'un disque d'obturation perforé ou fendu étant de préférence prévu comme actionneur (16) dans une barrière photoélectrique faisant office d'enregistreur (17).
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce qu'il est en plus prévu un enregistreur non décalable (17') dont la fréquence de sortie est comparée avec la fréquence de sortie de l''enregistreur décalable (17).
  11. Dispositif selon l'une des revendications 6 à 9, caractérisé en ce que dans le plan transversal par rapport à l'axe de rotation du tambour (14) sont prévus deux enregistreurs (17, 17a) basculés orthogonalement l'un par rapport à l'autre et à chaque fois décalables, les fréquences de sortie des deux enregistreurs décalables (17, 17a) étant comparées entre elles.
  12. Dispositif selon l'une des revendications 6 à 11, caractérisé en ce que le mécanisme d'entraînement du tambour de machine à laver (11) agit à l'encontre de sa nutation en fonction de la fluctuation du signal de la vitesse de rotation provenant du codeur rotatif (18) en influençant la vitesse de rotation ou son gradient ou encore par une redistribution du linge ou par des fluctuations superposées en phase du couple du mécanisme d'entraînement.
EP04022474A 2003-09-29 2004-09-22 Méthode et dispositif pour détecter les mouvements de balourd d'un tambour de machine à laver. Expired - Lifetime EP1519178B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10345591 2003-09-29
DE10345591A DE10345591B3 (de) 2003-09-29 2003-09-29 Verfahren und Einrichtung zum Erfassen von unwuchtabhängigen Bewegungserscheinungen bei einer Wäschetrommel
DE102004028365 2004-06-11
DE102004028365 2004-06-11

Publications (2)

Publication Number Publication Date
EP1519178A1 EP1519178A1 (fr) 2005-03-30
EP1519178B1 true EP1519178B1 (fr) 2007-01-17

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ID=34195779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04022474A Expired - Lifetime EP1519178B1 (fr) 2003-09-29 2004-09-22 Méthode et dispositif pour détecter les mouvements de balourd d'un tambour de machine à laver.

Country Status (4)

Country Link
US (1) US20050066450A1 (fr)
EP (1) EP1519178B1 (fr)
AT (1) ATE352029T1 (fr)
DE (1) DE502004002660D1 (fr)

Families Citing this family (10)

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DE102004053216B3 (de) * 2004-06-18 2006-02-09 Diehl Ako Stiftung & Co. Kg Vorrichtung zur Erfassung einer Schwingbewegung einer Wäschetrommel
DE102005037144B4 (de) * 2005-02-18 2007-04-19 Diehl Ako Stiftung & Co. Kg Schwingfähig aufgehängtes Innenaggregat einer Wäschebehandlungsmaschine mit einem Schwingungssensor
KR100664070B1 (ko) 2005-09-06 2007-01-03 엘지전자 주식회사 진동 저감형 모터의 고정자 및 이를 구비한 드럼 세탁기
US7581272B2 (en) * 2006-05-19 2009-09-01 Whirlpool Corporation Dynamic load detection for a clothes washer
KR101272341B1 (ko) * 2006-09-19 2013-06-05 엘지전자 주식회사 세탁기의 진동 감지 장치 및 방법
US8695381B2 (en) * 2008-03-28 2014-04-15 Electrolux Home Products, Inc. Laundering device vibration control
US8533882B2 (en) * 2009-11-20 2013-09-17 Whirlpool Corporation Laundry treating appliance with controlled oscillating movement
CN105403186B (zh) * 2015-12-31 2016-08-24 金华职业技术学院 一种差速滚筒长度比测试装置
CN113932971B (zh) * 2021-09-30 2024-06-04 广东万德盛自动化设备有限公司 重量平衡偏差检测感应片、检测系统、检测方法
CN119643085B (zh) * 2024-12-06 2025-10-10 赛旺检验检测认证有限公司 一种用于洗衣机滚筒振动实验的支撑架

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US2943472A (en) * 1959-05-18 1960-07-05 Gen Electric Unbalance sensing arrangement for machines having a centrifugal liquid extraction step
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US4440024A (en) * 1982-08-26 1984-04-03 Westinghouse Electric Corp. Tachogenerator
DE3421845A1 (de) * 1984-06-13 1985-12-19 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum erfassen der unwucht eines rotierenden koerpers
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Publication number Publication date
ATE352029T1 (de) 2007-02-15
DE502004002660D1 (de) 2007-03-08
EP1519178A1 (fr) 2005-03-30
US20050066450A1 (en) 2005-03-31

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