WO2008092803A1 - Dispositif de détection automatique d'objets - Google Patents

Dispositif de détection automatique d'objets Download PDF

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Publication number
WO2008092803A1
WO2008092803A1 PCT/EP2008/050855 EP2008050855W WO2008092803A1 WO 2008092803 A1 WO2008092803 A1 WO 2008092803A1 EP 2008050855 W EP2008050855 W EP 2008050855W WO 2008092803 A1 WO2008092803 A1 WO 2008092803A1
Authority
WO
WIPO (PCT)
Prior art keywords
rfid
objects
absorber material
rfid reading
reading
Prior art date
Application number
PCT/EP2008/050855
Other languages
German (de)
English (en)
Inventor
Thomas Bleisteiner
Clemens Bopp
Michael Dallhammer
Gerhard RÖTTER
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2008092803A1 publication Critical patent/WO2008092803A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • 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
    • B07C3/00—Sorting according to destination
    • B07C3/18—Devices or arrangements for indicating destination, e.g. by code marks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
    • G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10118—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the sensing being preceded by at least one preliminary step
    • G06K7/10128—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the sensing being preceded by at least one preliminary step the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device

Definitions

  • the invention relates to a device for automatic detection of objects, wherein the device comprises an RFID reader provided with at least two walls for checking the presence of the objects, which can be passed through a gap formed by the two walls, and a processing device for processing the presence results of the RFID reading device. Moreover, the invention relates to an RFID reading device and an article guidance system, in particular an airport baggage tracking system.
  • a device in which a so-called RFID (Radio Frequency Identification Device) technique is used, is sufficiently z.
  • B. in the context of an airport baggage tracking system known. During the transport of a piece of luggage on a belt conveyor by an RFID reader in the form of a
  • RFID cabin detects at least one arranged within this cabin, connected to an RFID reading unit RFID antenna information stored in a memory of an attached on the luggage RFID transponder (RFID tag) are deposited.
  • RFID tag RFID transponder
  • This information evaluates a processing device and, depending on an evaluation or presence result, the processing device controls a switch in such a way that the item of luggage is transported to a predetermined destination.
  • the correct chronological order of baggage detection is important. It may happen, for example, that a piece of luggage is transported to the destination of a piece of luggage following on the belt conveyor because this subsequent piece of luggage was first detected. In particular, when the distance of the luggage on the belt conveyor is too low, such erroneous transport piles up.
  • RFID booths are usually made of metal and curtainsed in the passageway.
  • the RFID booth with closed curtains shields the used RFID frequency range, ie the signals of the RFID transponders of the luggage outside the metal cabin are well shielded.
  • the signals of a piece of luggage still transported outside the cabin can be detected instead of the signals of a piece of luggage in the cabin . It has been shown in practice that even with a distance between two pieces of luggage of about one meter, the order of these pieces of luggage is no longer safely recognized correctly.
  • the present invention has for its object to provide a device of the type mentioned, with which a faulty detection of objects is largely avoided.
  • an RFID reading and / or writing device as well as an article guidance system, in particular an airport baggage tracking system, with which pieces of luggage can be detected largely error-free.
  • the chronological order of the detection of the objects in the RFID reading device corresponds to the time sequence of the transport of these objects by the RFID reading device.
  • the objects are also recorded correctly in time, if the distances of the objects are very small.
  • it ensures that the signals of the RFID transponders do not interfere with RFID readers of neighboring devices.
  • the invention is based on the idea of reading the signals of an RFID transponder only in the near field of an antenna of an RFID reader. This is aided in that the absorber material in the used RFID frequency range outside of the spatial reading range has an absorbing effect and dampens the RFID signal, which in particular greatly reduces reflections of the RFID signal in a metallic cabin. Namely, these metallic cabs reflect the electromagnetic wave extremely frequently, so that a controlled detection of the signal of the transponder without the use of absorber material is difficult. To avoid such reflections, you could indeed the cabin of non-conductive materials, eg. B. materials in the form of plastic or wood, form.
  • non-conductive materials eg. B. materials in the form of plastic or wood, form.
  • the electromagnetic wave penetrates the structure and a further RFID structure close to the location, which operates in the same frequency band with the same protocol, is disturbed.
  • signals are not read by their own but by transponders of other adjacent RFID reading stations.
  • all wall sides or both the wall sides and the inner sides of the cabin floor and the car ceiling are provided completely with absorber material or a layer which acts absorbing in the RFID frequency range used.
  • Transport route and Figure 9 shows a further advantageous embodiment of the device according to the invention.
  • FIGS. 6 to 8 a known basic structure of a transport path with an RFID reading device is shown.
  • objects in the form of objects 1, 2 are moved on a conveyor belt 3, wherein an RFID reading device 4 detects the objects 1, 2 transported through them, which means that the presence of the objects 1, 2 in the RFID reading device 4 is checked.
  • a processing unit not shown here, which may be part of the RFID reader 4, evaluates the detection or presence results and also controls a switch of the transport path, not shown here in such a way that the objects 1, 2 to their intended destinations 5, 6 are steered. It is assumed that the processing unit is programmed to transport the item 1 to the destination 5 and the item 2 to the destination 6. For this purpose, it is necessary that the objects 1, 2 are detected correctly in time in the RFID reader 4. This means that the chronological order of the detection of the objects 1, 2 corresponds to the time sequence of the transport of these objects 1, 2 by the RFID reading device 4.
  • the article 1 is transported to the destination 5 and the article 2 is transported to the destination 6 in accordance with the programming or parameterization of the processing unit (FIG. 7).
  • the objects 1, 2 are not recorded correctly in time, because the RFID signal of a transponder 8 arranged or fastened to the object 1 is detected or detected later in the RFID reading device 4 as the RFID signal of a transponder 9 of the object 2
  • this article 2 moves after the article 1 through the RFID reader 4, the articles 1, 2 are misdirected. That is, the object 1 moves to the target 6 instead of the predetermined target 5 and the article 2 moves to the target 5 instead of the predetermined target 6 (FIG. 8).
  • At least one inner wall of the RFID Reading device with absorber material or with an absorber material layer which is suitable for the absorption of the RFID signals of the transponder outside a predetermined or defined spatial reading area is provided.
  • FIGS. 1 to 5 in which an RFID reading device in the form of an RFID booth with differently arranged absorber material layers is shown, wherein parts in FIGS.
  • 10 denotes an RFID booth whose side walls 11 and their floor 12 and ceiling 13 are provided inside the cabin 10 with a layer 14 made of absorber material on the layers 14 of the side walls 11, the floor 12 and the ceiling 13 of the cabin, an RFID antenna 15 is attached in each case, which is connected via a cable to an RFID reader 16.
  • the absorber material 14 is selected so that a spatial reading range in the region of the antennas 15 is set up, ie only the RFID Signal of a transponder of an object, which moves in the vicinity of the antennas is detected, RFID signals outside this reading range, however, are a bsorbiert.
  • the RFID booth 10 has a maximum passage opening for the passage of larger objects.
  • a car 17 is shown with a restricted passage opening through which a conveyor belt 18 is passed in the figures 2 and 3.
  • the cabin 17 also has, on the inner sides of the walls 11 and on the inner sides of the floor 12 and the ceiling 13, a layer 14 consisting of absorber material, on each of which an RFID antenna 15 is attached.
  • FIG. 9 shows a further embodiment of the device according to the invention.
  • Moving objects 1, in particular items of luggage are thus also identified with particular certainty in their chronological order if they are passed successively through the RFID reading device of an airport luggage guidance system on a conveyor belt at a short distance.
  • the device or RFID reading device 17 has a cabin with two side walls 11, a bottom 12 and a ceiling 13.
  • This cabin 17, whose side panels and floor and ceiling have substantially the same length and thus almost is formed square, the luggage is moved through on a conveyor belt 18. All cabin parts 11, 12, and 13 are provided with a layer of the absorber material, but not shown in detail in FIG. 9.
  • an RFID antenna 15 is provided in the two upper corners of the cabin 17 in each case.
  • These RFID antennas 15 are aligned with respect to each other and with respect to the conveyor belt 18 so that they can detect all RFID transponders, regardless of their location on the luggage with the respective spatial reception areas of their antennas.
  • the arrangement shown in FIG. 9 has proven to be particularly advantageous, in which the two antennas 15 are aligned at an angle of approximately 40 to 50 degrees. To further improve the detection, especially if the RFID
  • Transponder should come to rest on the bottom of the bag between bag and the conveyor belt 18, at least one further RFID antenna 15 is provided between bottom 12 and conveyor belt 18.
  • the arrangement shown in FIG. 9 consisting of two RFID antennas 15 arranged side by side transversely to the transport direction has proven to be particularly advantageous.
  • these two RFID antennas 15, which are arranged between base and conveyor belt to be able to detect the RFID transponders on the conveyor belt, this must be transparent to the RFID signals at least in the spatial reception area of the RFID antennas 15.
  • the entire conveyor belt 18 is made of a non-metallic material.
  • FIGS. 4 and 5 show RFID reading devices 19, 20, of which the device 19 has no ceiling and the device 20 has neither a floor nor a ceiling.
  • Such devices are z. B. suitable for detecting vehicles, to each of which an RFID transponder is mounted. Due to the layers 14 of absorber material, the sequence recognition of the objects is achieved, in particular, in that the RFID signal or the electromagnetic wave is damped outside a predefinable or defined reading area in the absorber material, so that only in the near field of the antennas arranged on the absorber material the signal of the transponder is read. The number of antennas in a cabin is of minor importance.
  • the RFID reading devices 10, 17, 19, 20 can also be designed as RFID writing devices for writing information in tags arranged or attached to objects.
  • a write area is defined, wherein absorber material is provided for absorbing the RFID signals outside a defined write area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Control Of Conveyors (AREA)

Abstract

L'invention concerne un dispositif de détection automatique d'objets (1, 2), dispositif comprenant : un dispositif de lecture RFID (10, 17, 19, 20) muni d'au moins deux parois (11), destiné au contrôle de la présence d'objets (1, 2) susceptibles de se déplacer à travers un espace intermédiaire formé par les deux parois (11), et un dispositif de traitement destiné au traitement des résultats de présence du dispositif de lecture RFID (10, 17, 19, 20). Des dispositions appropriées permettent d'éviter, dans une large mesure, une détection erronée d'objets (1, 2), du fait que l'invention garantit que la séquence temporelle de la détection des objets (1, 2) dans le dispositif de lecture RFID (10, 17, 19, 20) correspond à la séquence temporelle du transport de ces objets (1, 2) à travers le dispositif de lecture RFID (10, 17, 19, 20).
PCT/EP2008/050855 2007-01-29 2008-01-25 Dispositif de détection automatique d'objets WO2008092803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07001851.0 2007-01-29
EP07001851 2007-01-29

Publications (1)

Publication Number Publication Date
WO2008092803A1 true WO2008092803A1 (fr) 2008-08-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2490150A1 (fr) * 2011-02-21 2012-08-22 Sick AG Tunnel de lecture RFID et procédé de lecture de transpondeurs RFID
WO2012156780A1 (fr) * 2011-05-16 2012-11-22 Usta Teknoloji Elektronik Insaat Imalat Camasir Yikama Gida Sanayi Ve Ticaret Limited Sirketi Dispositif de suivi d'article utilisant l'identification radiofréquence (rfid)
DE102016122682A1 (de) 2016-11-24 2018-05-24 Balluff Gmbh Verfahren und Einrichtung zur Bestimmung der Reihenfolge von Objekten mittels Transpondertechnologie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627736A1 (de) * 1996-07-10 1998-01-15 Telesensomatic Gmbh Verfahren zur Lokalisierung und/oder Verfolgung von mobilen Objekten und Anordnung zur Durchführung des Verfahrens
US6104291A (en) * 1998-01-09 2000-08-15 Intermec Ip Corp. Method and apparatus for testing RFID tags
US6696954B2 (en) * 2000-10-16 2004-02-24 Amerasia International Technology, Inc. Antenna array for smart RFID tags
EP1612579A2 (fr) * 2004-07-01 2006-01-04 Omron Corporation Appareil pour la communication avec des étiquettes RFID comprenant une antenne à balayage électronique
US20060170556A1 (en) * 2005-01-18 2006-08-03 Lexin Technology Inc. System for detecting an RFID tag
US20060244607A1 (en) * 2005-03-29 2006-11-02 Zhong-Min Liu RFID conveyor system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627736A1 (de) * 1996-07-10 1998-01-15 Telesensomatic Gmbh Verfahren zur Lokalisierung und/oder Verfolgung von mobilen Objekten und Anordnung zur Durchführung des Verfahrens
US6104291A (en) * 1998-01-09 2000-08-15 Intermec Ip Corp. Method and apparatus for testing RFID tags
US6696954B2 (en) * 2000-10-16 2004-02-24 Amerasia International Technology, Inc. Antenna array for smart RFID tags
EP1612579A2 (fr) * 2004-07-01 2006-01-04 Omron Corporation Appareil pour la communication avec des étiquettes RFID comprenant une antenne à balayage électronique
US20060170556A1 (en) * 2005-01-18 2006-08-03 Lexin Technology Inc. System for detecting an RFID tag
US20060244607A1 (en) * 2005-03-29 2006-11-02 Zhong-Min Liu RFID conveyor system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2490150A1 (fr) * 2011-02-21 2012-08-22 Sick AG Tunnel de lecture RFID et procédé de lecture de transpondeurs RFID
US8902046B2 (en) 2011-02-21 2014-12-02 Sick Ag RFID reading tunnel and method for reading RFID transponders
WO2012156780A1 (fr) * 2011-05-16 2012-11-22 Usta Teknoloji Elektronik Insaat Imalat Camasir Yikama Gida Sanayi Ve Ticaret Limited Sirketi Dispositif de suivi d'article utilisant l'identification radiofréquence (rfid)
DE102016122682A1 (de) 2016-11-24 2018-05-24 Balluff Gmbh Verfahren und Einrichtung zur Bestimmung der Reihenfolge von Objekten mittels Transpondertechnologie

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