WO2009021515A1 - Appareil et procédé de comptage, d'identification et/ou de tri d'articles - Google Patents

Appareil et procédé de comptage, d'identification et/ou de tri d'articles Download PDF

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Publication number
WO2009021515A1
WO2009021515A1 PCT/DK2008/000287 DK2008000287W WO2009021515A1 WO 2009021515 A1 WO2009021515 A1 WO 2009021515A1 DK 2008000287 W DK2008000287 W DK 2008000287W WO 2009021515 A1 WO2009021515 A1 WO 2009021515A1
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WO
WIPO (PCT)
Prior art keywords
photoelectric sensor
objects
sensor unit
scanning plane
unit
Prior art date
Application number
PCT/DK2008/000287
Other languages
English (en)
Inventor
Knud Stovring
Original Assignee
Anker Andersen A/S
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 Anker Andersen A/S filed Critical Anker Andersen A/S
Publication of WO2009021515A1 publication Critical patent/WO2009021515A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B07C5/122—Sorting according to size characterised by the application to particular articles, not otherwise provided for for bottles, ampoules, jars and other glassware
    • B07C5/126—Sorting according to size characterised by the application to particular articles, not otherwise provided for for bottles, ampoules, jars and other glassware by means of photo-electric sensors, e.g. according to colour
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/06—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by returnable containers, i.e. reverse vending systems in which a user is rewarded for returning a container that serves as a token of value, e.g. bottles
    • G07F7/0609—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by returnable containers, i.e. reverse vending systems in which a user is rewarded for returning a container that serves as a token of value, e.g. bottles by fluid containers, e.g. bottles, cups, gas containers

Definitions

  • the present invention relates to an apparatus and a method for counting, identifying and/or sorting objects, in particular recyclable beverage containers, such as bottles or cans.
  • An apparatus for such a method is known from WO 2006/125436, wherein packages are forwarded sequentially through a recording unit and an identification marking on each package is detected by one or more cameras and compared to a reference value whereby information about the package may be determined.
  • the apparatus furthermore comprises one or more detectors, which are used for determining the presence of the objects in the recording unit of the apparatus.
  • the detector means are positioned in the scanning plane perpendicular to the axis of movement of the objects in between the cameras in the annular ring with the objects on the conveyor means substantially in the centre of this scanning circle.
  • the detector means are either photoelectric sensors with combined transmitter and receiver parts where the transmitter part emits light towards the objects and associated mirrors are positioned opposite the light emitting sensors reflecting the light back into the receiver part or separate transmitter and receiver parts where the transmitter emits light towards the object and is detected by the receiver part positioned opposite to the transmitter part.
  • the detector parts It is important to keep the detector parts clean in order to safeguard the function of the detectors.
  • residues of fluids in the cans and bottles often escape during the processing of the containers in the apparatus which accumulates inside the apparatus and in particular the recording unit.
  • the detector parts In relation to recording recycled beverage containers in a reverse vending system, the detector parts must often be cleaned or otherwise the detectors fail to record the presence of a container which is then not recorded and no refund is paid.
  • the detector parts are cleaned by an operator on a regular basis, often several times per day.
  • the invention concerns an apparatus for counting and/or sorting objects, in particular recyclable beverage containers, such as bottles or cans, said apparatus comprising a receiving section from which the objects are forwarded on conveyor means to a recording unit and subsequently forwarded for counting and/or sorting, said recording unit comprising a scanning plane generally perpendicular to the direction of travel of the objects, and at least one photoelectric sensor unit provided in said scanning plane for registering the presence of an object in the scanning plane, said at least one photoelectric sensor unit comprising at least one transmitter part comprising at least one light emitting unit for emitting light towards the objects, and at least one receiver part for receiving the light emitted from the at least one transmitter part, the apparatus characterized in that the at least one photoelectric sensor unit is self-adjustable, preferably by continuously adjusting the characteristics of the at least one light emitting unit to compensate for degraded reflection characteristics of the at least one photoelectric sensor unit.
  • the invention regards a method for counting and/or sorting objects, in particular recyclable beverage containers, such as bottles or cans, said method comprising the steps of:
  • At least one transmitter part comprising at least one light emitting unit for emitting light towards the objects
  • At least one photoelectric sensor unit for receiving the light emitted from the transmitter part, said at least one photoelectric sensor unit being self-adjustable, preferably by continuously adjusting the characteristics of the at least one light emitting unit to compensate for degraded reflection characteristics of the at least one photoelectric sensor unit, and
  • At least one mirror is located opposite the at least one transmitter part and the at least one receiver part, whereby light emitted from the transmitter part is reflected in the at least one mirror back into the receiver part.
  • the transmitter part and the receiver part are thereby preferably located together whereby the photoelectric sensor unit can be substantially one component.
  • the mirror is an additional recipient of dust, filth and liquids in addition to the transmitter and the receiver parts.
  • the at least one transmitter part and the at least one receiver part is located substantially opposite each other, whereby light emitted from the transmitter part is received in the receiver part.
  • any object that enters the recording unit can be detected and thereby counted.
  • identification of the objects must be provided.
  • a plurality of cameras is arranged in the scanning plane.
  • at least part of the recyclable beverage containers are provided with at least one visibly detectable identification marking, whereby the beverage containers can be identified by means of scanning the at least one identification marking, preferably by means of cameras.
  • An identification marking may also be identified by means of one or more scanners, such as bar code scanners.
  • cameras in the recording unit may be replaced or supplied by one or more scanners.
  • more than one scanning plane is provided.
  • Recording unit(s) can be provided in each scanning plane to decrease the risk of not registering objects.
  • Cameras can be provided in each scanning plane to decrease the risk of not identifying objects.
  • Cameras may be in one scanning plane and recording unit(s) in another scanning plane.
  • more than one sensor unit can be provided, preferably distributed in the scanning plane.
  • at least two photoelectric sensor units are provided with an angular displacement in the scanning plane, said angular displacement preferably being between 45-135°.
  • the use of two sensor units in the scanning plane in the recording unit means that transparent containers, such as water bottles of transparent plastic, may be detected from different angles, whereby the risk of missing detection of containers is further decreased, even if the emitted light from one of the sensor units passes through the transparent bottle and is received by the receiving part of the sensor.
  • the conditions inside the recording unit may change during operation. Humidity, temperature, dirt, filth, dust, liquids and the like may change the operating conditions as well as influencing lenses, mirrors, light sources and other sensitive components.
  • a way of correcting for the changing conditions is to monitor the contrast in the recording unit and adjust the sensor when the contrast changes and/or how the contrast changes.
  • an automatic contrast tracking system is comprised. Thereby e.g. resetting of said photoelectric sensor can be provided. This resetting can be provided at regular intervals or when a change is detected by the contrast tracking system.
  • the sensor unit can furthermore compensate for varying conditions by adjusting the level of emitted light.
  • the photoelectric sensor unit can preferably automatically adjust the level of emitted light just appropriate to provide detection of almost any object in the light beam.
  • This can for example be provided by an automatic calibration procedure, preferably provided in a short period without objects in the light beam between the transmitter and the receiver.
  • This calibration procedure may include comparing the level of light detected by the receiver with and without a predefined object, item, foil or the like in the light beam, said object, item, foil or the like having known light transparency. Thereby the receiver sensitivity and/or the level of emitted light can be adjusted to automatically calibrate the sensor unit.
  • This calibration procedure may be provided at regular intervals and/or when a change in operating condition is detected.
  • a particular embodiment of the invention is an apparatus for identifying objects for sorting the objects, in particular recyclable beverage containers, such as bottles or cans, which are provided with at least one visibly detectable identification marking, said apparatus comprising a receiving section from which the objects are forwarded on conveyor means to a recording unit and after the recording the objects are forwarded for sorting, said recording unit comprises a plurality of cameras arranged in a scanning plane generally perpendicular to the direction of travel of the objects, at least one photoelectric sensor unit is provided in said scanning plane for registering the presence of an object in the scanning plane, said photoelectric sensor unit comprises a light emitting and receiving unit and a reflector unit provided opposite said light emitting unit, wherein the light emitting unit of the sensor unit is self-adjustable so that said light emitting unit of the sensor unit continuously adjusts the characteristics of the light emitting unit to compensate for degraded reflection characteristics of the photoelectric sensor unit.
  • Yet another embodiment of the invention is an apparatus for identifying objects for sorting the objects, in particular recyclable beverage containers, such as bottles or cans, which are provided with at least one visibly detectable identification marking, said apparatus comprising a receiving section from which the objects are forwarded on conveyor means to a recording unit and after the recording the objects are forwarded for sorting, said recording unit comprises a plurality of cameras arranged in a scanning plane generally perpendicular to the direction of travel of the objects, at least one photoelectric sensor unit is provided in said scanning plane for registering the presence of an object in the scanning plane, said at least one photoelectric sensor unit comprising at least one transmitter part comprising at least one light emitting unit for emitting light towards the objects, and at least one receiver part for receiving the light emitted from the at least one transmitter part, the at least one photoelectric sensor unit is self-adjustable, preferably by continuously adjusting the characteristics of the at least one light emitting unit to compensate for degraded reflection characteristics of the at least one photoelectric sensor unit.
  • the degradation of the reflected light signal from the transmitter part, the reflector part or the receiver part may be adjusted for. This means that less manual cleaning is required. Hereby dirt covers on the reflectors may be automatically adjusted for.
  • the typical application used in most countries in reverse vending systems is where the total refund is based on counting the beverage containers and detecting one or more identification markings (bar codes and/or security markings) on the beverage container. For each container counted there must be associated one or more identification markings to validate the total refund.
  • identification markings bar codes and/or security markings
  • Fig. 1 is a schematic view of one embodiment of an apparatus according to the invention used in a recording and sorting apparatus
  • fig. 2 is a schematic side view of a recording unit in one embodiment of an apparatus according to the invention
  • fig. 3 is a schematic front view of the recording unit in fig. 2.
  • the this particular embodiment of the invention relates to a recording and sorting apparatus for handling recycled objects 1 , in particular beverage containers such as bottles of various plastic materials and cans of aluminium or steel, in particular beverage containers 1 that are part of a return vending system.
  • Returned objects 1 are collected and filled into a container 10 and forwarded along a conveyor section 11 comprising a plurality of conveyors in series and through a recording unit 12 for identifying the objects 1.
  • the objects 1 are forwarded into the recording unit 12 on a first conveyor 15 and out of the recording unit 12 on a second conveyor 16 to a sorting section 13 where the packages 1 are sorted according to one or more characteristics detected in the recording unit 12 and recorded and processed in a control system 14.
  • Each object 1 is provided with an identification marking 5, such as a bar code and possibly also a security marking 6 verifying that the identification marking 5 is authentic.
  • the identification marking 5 and the security sign 6 are scanned by the cameras 2.
  • two photoelectric sensor units 3, 4 are furthermore provided.
  • each sensor unit comprises a photoelectric sensor with combined transmitter and receiver parts 3 where the transmitter part emits light towards the objects and associated mirrors 4 are positioned opposite the light emitting sensors reflecting the light back into the receiver part.
  • each sensor unit comprises separate transmitter and receiver parts where the transmitter part 3 emits light towards the object and is detected by the receiver part 4 positioned opposite to the transmitter part,
  • the light emitting unit 3 of the sensor unit is self-adjustable by continuously adjusting the characteristics of the emitted light to compensate for degraded reflection characteristics of the photoelectric sensor unit.
  • two sensor units 3, 4 are provided with a mutual angular displacement in the scanning plane, such as an angular displacement between 45-135° (see fig. 3).
  • the use of two sensor units 3, 4 in the scanning plane S in the recording unit 12 means that transparent containers 1 , such as water bottles of transparent plastic, may be detected from different angles, whereby the risk is eliminated that no container is detected even if the emitted light from one of the sensor units 3, 4 passes through the transparent bottle and is reflected back by the mirror back through the transparent bottle.
  • the sensor units 3, 4 When the sensor units 3, 4 are installed, the sensor units may automatically adjust for condition changes, such as dirt on the lenses or reflectors in the sensor units 3, 4. This adjustment may be achieved because the sensors 3 include an automatic contrast tracking system so that the sensor is capable of resetting itself at regular intervals.
  • condition changes such as dirt on the lenses or reflectors in the sensor units 3, 4.
  • a traditional photo sensor is implemented in basically 2 ways:
  • the photo sensor comprises a single unit, which comprises a transmitting part and a receiving part.
  • the transmitting part emits light towards the object to be detected and is reflected by a mirror, preferably positioned diagonally and substantially opposite to the transmitter behind the object to be detected.
  • a mirror preferably positioned diagonally and substantially opposite to the transmitter behind the object to be detected.
  • the light transmitted by the transmitter is travelling uninterrupted from the transmitter to the mirror and back to the receiving part of the photo sensor.
  • the light beam is interrupted and no (or less) light passes back to the receiving part of the photo sensor.
  • the photo sensor comprises two units, a transmitting part and a receiving part.
  • the transmitting part emits light towards the object to be detected.
  • the light transmitted by the transmitter is travelling uninterrupted from the transmitter to the receiving part and will be detected by the receiving part.
  • the light beam is interrupted and no (or less) light passes from the transmitting part to the receiving part of the photo sensor.
  • the light emitted by the transmitting part can be diffused or focused light, monochromatic or broadband light, modulated or un-modulated light, polarised or un- polarised light.
  • the level of light received by the receiver part of the photo sensor now depends on the setting of the light level, which has been done manually plus contribution from the following parameters:
  • Dirt, scratches or dust on the surface of the transmitter part of the photo sensor Dirt, scratches or dust on the surface of the mirror. • Dirt, scratches or dust on the surface of the receiving part of the photo sensor.
  • the present invention is based on a so-called “self adjusting photo sensor” which operates as follows:
  • the self adjusting photo sensor will during power up preferably perform an automatic calibration equivalent to the manual adjustment procedure explained above.
  • the self adjusting photo sensor will automatically set the level of light just appropriate to detect "object” or “no object” in the light beam.
  • the self adjusting photo sensor will basically be subject to the same kind of degradation caused by dirt, dust and remaining liquids in the beverage containers as is the case with the traditional photo sensor.
  • the self adjusting photo sensor is able to continuously perform the self adjusting / calibration procedure.
  • the self adjusting photo sensor will preferably perform the calibration procedure and thereby eliminate the effect of the degradation build up since the last calibration procedure took place.
  • the calibration procedure may only last a few milliseconds and will not interfere with the basic operation of the apparatus.
  • the self adjusting photo sensor according to the invention automatically adapts to the environment and the changes in the operating conditions whereas a traditional photo sensor will require manual intervention on a regular basis to maintain the operational quality of the apparatus. With the requirements to the sensitivity and efficiency of modern return vending systems, a photo sensor requiring manual intervention is not applicable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sorting Of Articles (AREA)

Abstract

La présente invention concerne un appareil pour compter et/ou trier des articles (12), en particulier des conteneurs de boisson recyclables, qu'il s'agisse de canettes ou de bouteilles ; l'appareil se compose d'une section de réception à partir de laquelle les articles sont acheminés sur une bande transporteuse (15) à une unité d'enregistrement (12) puis acheminés pour leur comptage et/ou leur tri. Cette unité d'enregistrement comprend un plan de balayage (5) généralement perpendiculaire au sens d'acheminement des articles et au moins un capteur photoélectrique (3, 4) inclus dans le plan de balayage mentionné (5) pour enregistrer la présence d'un article sur le plan de balayage. Ce ou ces capteurs photoélectriques (3, 4) comprennent au moins une pièce de transmission (3) comprenant au moins une unité émettrice de lumière pour émettre de la lumière vers les articles, et au moins une portion réceptrice (4) pour recevoir la lumière émise par la ou les pièces de transmission. L'appareil se caractérise en ce que le ou les capteurs photoélectriques sont auto-réglables, de préférence en ajustant continuellement les caractéristiques de la ou les unités émettrices de lumière afin de compenser les caractéristiques de réflexion dégradées du ou des capteurs photoélectriques.
PCT/DK2008/000287 2007-08-13 2008-08-13 Appareil et procédé de comptage, d'identification et/ou de tri d'articles WO2009021515A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200701151 2007-08-13
DKPA200701151 2007-08-13

Publications (1)

Publication Number Publication Date
WO2009021515A1 true WO2009021515A1 (fr) 2009-02-19

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
DE102010002487A1 (de) 2010-03-01 2011-09-01 Sielaff Gmbh & Co. Kg Automatenbau Vorrichtung zur optischen Erkennung von Merkmalen auf Verpackungen sowie entsprechendes Verfahren
WO2012034562A1 (fr) * 2010-09-15 2012-03-22 Anker Andersen A/S Appareil de comptage et de tri de multiples objets
EP2538392A1 (fr) * 2011-06-24 2012-12-26 Tomra Systems ASA Système et procédé pour la lecture de fonctions dans des machines de reprise de récipients consignés
EP2538393A1 (fr) * 2011-06-24 2012-12-26 Tomra Systems ASA Machine de reprise de récipients consignés et procédé pour détecter de la saleté dans une telle machine
EP2295156A3 (fr) * 2009-09-10 2013-05-29 Krones AG Dispositif de transport avec moyens de détection d'articles renversés et son procédé de commande
EP3035303A1 (fr) * 2014-12-17 2016-06-22 Wincor Nixdorf International GmbH Automate de reprise
EP3208782A1 (fr) * 2016-02-22 2017-08-23 Wincor Nixdorf International GmbH Dispositif de reprise pour bouteilles consignees
WO2018141337A1 (fr) * 2017-02-02 2018-08-09 Reverse Logistics GmbH Dispositif de détection de produit
US10943425B2 (en) 2016-03-04 2021-03-09 Datalogic Usa, Inc. Device and system for high-speed bottom scanning of barcodes
JP2021526212A (ja) * 2018-06-20 2021-09-30 ホイフト ジュステームテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング テスト容器プロトコール法
US11548729B1 (en) * 2021-07-27 2023-01-10 Oregon Beverage Recycling Cooperative Recycling system with discrete conveyor bins for improved accuracy

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US2988218A (en) * 1955-04-05 1961-06-13 Owens Illinois Glass Co Apparatus for gauging and inspecting glassware
US3411625A (en) * 1965-08-12 1968-11-19 Industrial Dynamics Co Pattern recognition device
GB1466181A (en) * 1973-02-23 1977-03-02 Datz H Sehrt Testing hollow ware
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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295156A3 (fr) * 2009-09-10 2013-05-29 Krones AG Dispositif de transport avec moyens de détection d'articles renversés et son procédé de commande
EP2363837A1 (fr) 2010-03-01 2011-09-07 Sielaff Gmbh & Co. Kg Automatenbau Dispositif de reconnaissance optique de caractéristiques sur des emballages et procédé correspondant
DE102010002487A1 (de) 2010-03-01 2011-09-01 Sielaff Gmbh & Co. Kg Automatenbau Vorrichtung zur optischen Erkennung von Merkmalen auf Verpackungen sowie entsprechendes Verfahren
WO2012034562A1 (fr) * 2010-09-15 2012-03-22 Anker Andersen A/S Appareil de comptage et de tri de multiples objets
WO2012177148A1 (fr) * 2011-06-24 2012-12-27 Tomra Systems Asa Système et procédé permettant de lire des caractéristiques dans des déconsigneurs
WO2012177146A1 (fr) * 2011-06-24 2012-12-27 Tomra Systems Asa Récupératrice automatique de déchets et procédé de détection de saletés dans une récupératrice automatique de déchets
US9785868B2 (en) 2011-06-24 2017-10-10 Tomra Systems Asa Reverse vending machine and method of detecting dirt in a reverse vending machine
EP2538393A1 (fr) * 2011-06-24 2012-12-26 Tomra Systems ASA Machine de reprise de récipients consignés et procédé pour détecter de la saleté dans une telle machine
CN103797522A (zh) * 2011-06-24 2014-05-14 陶朗系统公司 用于读取反向自动售货机器中的特征的系统和方法
US20140210967A1 (en) * 2011-06-24 2014-07-31 Tomra Systems Asa System and method for reading features in reverse vending machines
JP2014525072A (ja) * 2011-06-24 2014-09-25 トムラ・システムズ・エイ・エス・エイ 容器回収機内の特性を読み取るシステムおよび方法
AU2012273535B2 (en) * 2011-06-24 2016-01-21 Tomra Systems Asa System and method for reading features in reverse vending machines
EP3477606A1 (fr) * 2011-06-24 2019-05-01 Tomra Systems ASA Système et procédé pour la lecture de fonctions dans des machines de reprise de récipients consignés
US9934454B2 (en) 2011-06-24 2018-04-03 Tomra Systems Asa System and method for reading features in reverse vending machines
EP2538392A1 (fr) * 2011-06-24 2012-12-26 Tomra Systems ASA Système et procédé pour la lecture de fonctions dans des machines de reprise de récipients consignés
CN105712069A (zh) * 2014-12-17 2016-06-29 德利多富国际有限责任公司 自动收回装置
US20160182861A1 (en) * 2014-12-17 2016-06-23 Wincor Nixdorf International Gmbh Reverse vending machine
EP3035303A1 (fr) * 2014-12-17 2016-06-22 Wincor Nixdorf International GmbH Automate de reprise
US10554933B2 (en) 2014-12-17 2020-02-04 Wincor Nixdorf International Gmbh Reverse vending machine
EP3208782A1 (fr) * 2016-02-22 2017-08-23 Wincor Nixdorf International GmbH Dispositif de reprise pour bouteilles consignees
EP3208782B1 (fr) 2016-02-22 2022-10-19 Wincor Nixdorf International GmbH Dispositif de reprise pour bouteilles consignees
US10623658B2 (en) 2016-02-22 2020-04-14 Wincor Nixdorf International Gmbh Return device for empties
US10943425B2 (en) 2016-03-04 2021-03-09 Datalogic Usa, Inc. Device and system for high-speed bottom scanning of barcodes
WO2018141337A1 (fr) * 2017-02-02 2018-08-09 Reverse Logistics GmbH Dispositif de détection de produit
JP2021526212A (ja) * 2018-06-20 2021-09-30 ホイフト ジュステームテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング テスト容器プロトコール法
JP7312199B2 (ja) 2018-06-20 2023-07-20 ホイフト ジュステームテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング テスト容器プロトコール法
US11747285B2 (en) 2018-06-20 2023-09-05 Heuft Systemtechnik Gmbh Test bottle protocol method
US11548729B1 (en) * 2021-07-27 2023-01-10 Oregon Beverage Recycling Cooperative Recycling system with discrete conveyor bins for improved accuracy
US20230031937A1 (en) * 2021-07-27 2023-02-02 Oregon Beverage Recycling Cooperative Recycling system with discrete conveyor bins for improved accuracy

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