EP1952314A1 - Apparatus and method for testing the reading reliability of smart labels - Google Patents

Apparatus and method for testing the reading reliability of smart labels

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Publication number
EP1952314A1
EP1952314A1 EP06819367A EP06819367A EP1952314A1 EP 1952314 A1 EP1952314 A1 EP 1952314A1 EP 06819367 A EP06819367 A EP 06819367A EP 06819367 A EP06819367 A EP 06819367A EP 1952314 A1 EP1952314 A1 EP 1952314A1
Authority
EP
European Patent Office
Prior art keywords
smart
reader
smart label
tested
antenna
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Withdrawn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
EP06819367A
Other languages
German (de)
French (fr)
Inventor
Volker Brod
Henrik Bufe
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.)
Muehlbauer GmbH and Co KG
Original Assignee
Muehlbauer GmbH 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.)
Filing date
Publication date
Application filed by Muehlbauer GmbH and Co KG filed Critical Muehlbauer GmbH and Co KG
Publication of EP1952314A1 publication Critical patent/EP1952314A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
    • 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
    • G06K7/10366—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 interrogation device being adapted for miscellaneous applications
    • G06K7/10415—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 interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM
    • G06K7/10425—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 interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM the interrogation device being arranged for interrogation of record carriers passing by the interrogation device
    • G06K7/10435—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 interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM the interrogation device being arranged for interrogation of record carriers passing by the interrogation device the interrogation device being positioned close to a conveyor belt or the like on which moving record carriers are passing
    • 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
    • G06K7/10366—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 interrogation device being adapted for miscellaneous applications
    • G06K7/10465—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 interrogation device being adapted for miscellaneous applications the interrogation device being capable of self-diagnosis, e.g. in addition to or as part of the actual interrogation process

Definitions

  • the invention relates to an apparatus and method for testing the read reliability of smart labels.
  • Smart labels are known in the art. They usually have a coil-shaped antenna, which is applied to a substrate, and a chip connected to the antenna. To protect the components corresponding cover layers are provided. Smart labels are very thin and are offered in practice, for example in the form of self-adhesive labels.
  • a measuring device which has a combined transmitting and receiving unit (the so-called reader) and an antenna connected to the reader.
  • the reader communicates contactlessly with a standardized data protocol with the smart label to be tested arranged at a distance from the antenna.
  • the achievable distance for a stable communication between the reader and the smart label is essentially due to the transmission power of the reader, the structure of the and determined by the influences of the current environment (eg free field, metallic surfaces, liquids, etc.) for the entire transmission path.
  • the smart label When the smart label is affixed to an object, it can also have an additional influence on the reading range, depending on the high-frequency features.
  • the read reliability of smart labels was tested with the known measuring device by keeping the transmitting power of the reader constant and changing the distance between the smart label and the reader antenna.
  • the transmission power was for example 0.5 watts.
  • the range of the reading range ie the area in which the smart label could still be read, was the measure of the read reliability. Read reliability was documented for each smart label.
  • a disadvantage of the known method is the time factor. It is laborious to move the smart labels over a relatively wide range to determine the demolition of the communication. In addition, arise in the known test device problems in the size of the test setup. Smart labels can have ranges of several meters, so that the test device must have corresponding dimensions.
  • the invention has for its object to provide a test device under the elimination of the disadvantages described, which is able to test smart labels faster and with lower device complexity on their reading reliability out.
  • the device mentioned above a reader, arranged at a distance from the reader transport device for receiving and transporting the smart labels, and means for adjusting the transmission power of the reader, wherein the reader comprises a reader antenna whose distance to the transport device is changeable.
  • the device according to the invention makes it possible, via the adjustable antenna, first of all, to adapt the wave propagation characteristic to the measuring arrangement to provide a favorable presetting of the distance between the antenna and the smart label. to take.
  • Essential in this context are the wave minima and maxima of the respective field.
  • the transmission power is gradually reduced and the smart label is read out in each case.
  • the area in which the smart label can be reproducibly read (and possibly written) determines the degree of read reliability.
  • the entire reader (with antenna) can be moved towards the smart label.
  • the antenna is movable relative to the smart label. This reduces the moving masses and thus increases the response accuracy and speed.
  • the transport device has a conveyor belt.
  • the smart labels are transported on this conveyor belt into the test device, read in the test device (or described) and led out of the device, where they can then be removed.
  • a stepper motor for driving the conveyor belt is provided, which can otherwise rotate on rollers.
  • a shield is provided, which ensures that the reader only communicates with a smart label.
  • the other already read or following smart labels are shielded.
  • the shielding will be arranged at a suitable distance from the smart labels. As advantageous, a small distance has been found.
  • a base element is arranged on the side of the respective smart label opposite the reader - A -
  • the base element can be coupled to the smart label, wherein advantageously the read reliability of the overall module can be determined.
  • the distance between the base member and the smart label is changeable.
  • the base element may be the later carrier itself. However, it can also be provided that the base element corresponds to the object on which the smart label (later) is applied. It is particularly advantageous if the physical properties of the base element correspond to the object on which the smart label is attached.
  • the antenna and the smart label to be tested are arranged in a space of the measuring device which is high-frequency-damped (RF-attenuated) with respect to the environment.
  • the space may be formed by a measuring chamber which has at least on its inside RF-absorbing absorber material.
  • the outer walls are suitably made of metal.
  • a preferred embodiment of the invention is characterized in that the reader is also arranged inside the measuring chamber.
  • the object is further achieved by a method for testing the read reliability of smart labels, wherein at least one smart label is transported in a measuring device having a reader and an antenna coupled thereto, the distance between the antenna and the reader in is preset in a first step, and wherein in a second step, the transmission power of the reader at a preset distance of the antenna is reduced.
  • the smart labels tested with the method according to the invention can be classified on the basis of the determined reading sensitivity.
  • the determined level for each smart label can be defined as a key figure, which can be used to deduce the read range of the smart label.
  • the smart labels are gradually transported into the measuring device. This ensures a fast and continuous test sequence.
  • a high throughput is ensured by the fact that several smart labels are consecutively fed into the measuring device, in each case only one smart label is described or read and the others are shielded.
  • the carrier material of the smart label can also have an influence on the read range of the smart label.
  • the distance between the smart label and the base element is preferably changeable.
  • FIG. 1 shows a device 1 for testing the reading range of smart labels.
  • the individual smart labels 3 are transported through a measuring chamber 4. This is done stepwise via a conveyor belt 5.
  • the smart labels 3 are thus tested in the step method, wherein in the respective reading or writing process even the smart labels stand still and are transported further after a successful test. A high throughput with good measurement reliability is the result.
  • the device 1 has a reader, that is to say a read / write unit 6, which is coupled to a reader antenna 7.
  • the antenna 7 is in the direction of the arrow P1 movable.
  • the reader 6 is used to emit an RF signal (high-frequency signal) to the respectively to be tested smart label 8 and possibly to receive the output from the smart label signals.
  • the transmission power of the signals is adjustable according to the invention. In this way, a different distance between the antenna 7 and the smart label 8 can be simulated.
  • the distance d between the antenna and the smart label 8 to be tested is set, specifically to adapt the wave propagation characteristic (minimums and maximums of the HF wave) to the measuring arrangement.
  • the transmission power of the reader 6 is gradually reduced, thereby simulating a progressive distance between the antenna 7 and the smart label.
  • a shield 9 is arranged such that only the Smart Label 8 to be tested communicates with the antenna.
  • the shield 9 may be formed like an aperture with an opening 10.
  • the opening 10 may be adjustable in size.
  • a base member 11 is arranged below the conveyor belt 5.
  • This basic element preferably corresponds in terms of its properties to the object on which the smart label is later arranged.
  • the base element 1 1 is held by a support device 12, wherein the distance to the smart label by means of an adjusting device 13 is variable, as indicated by the arrow P2. By the base element 1 1 later circumstances can be simulated even during the measurement.
  • the measuring chamber 4 has side walls 14 made of metal, which are lined with an absorber material 15.
  • the absorber material is used for UHF wave attenuation. In this way, external, the measurement result falsifying disturbances can be avoided. LIST OF REFERENCES

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  • Computer Vision & Pattern Recognition (AREA)
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Abstract

The invention relates to an apparatus for testing the reading reliability of smart labels (3), having a reader (6), a transport device (2) arranged at a distance from the reader (6), for receiving and transporting the smart labels (3), and a device for setting the transmission power of the reader (6), the reader (6) having a reader antenna (7) whose distance (d) from the transport device (2) can be altered.

Description

Vorrichtung und Verfahren zum Testen der Lesezuverlässigkeit von Smart Labels Apparatus and method for testing the read reliability of smart labels
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Testen der Lesezuverlässigkeit von Smart Labels.The invention relates to an apparatus and method for testing the read reliability of smart labels.
Smart Labels sind aus dem Stand der Technik bekannt. Sie weisen üblicherweise eine spu- lenförmige Antenne, die auf ein Substrat aufgetragen ist, und einen mit der Antenne verbundenen Chip auf. Zum Schutz der Bauelemente sind entsprechende Deckschichten vorgesehen. Smart Labels sind sehr dünn und werden in der Praxis beispielsweise in Form von Selbstklebeetiketten angeboten.Smart labels are known in the art. They usually have a coil-shaped antenna, which is applied to a substrate, and a chip connected to the antenna. To protect the components corresponding cover layers are provided. Smart labels are very thin and are offered in practice, for example in the form of self-adhesive labels.
Ein wesentliches Auswahlkriterium bei Smart Labels ist die Lese-/Schreib-Reichweite. Man spricht hier auch von der Lesezuverlässigkeit der Smart Labels. Um eine Aussage über die Lesezuverlässigkeit zu erhalten, werden Smart Labels auf ihre Reichweite hin getestet.An important selection criterion for smart labels is the read / write range. This is also referred to as the read reliability of smart labels. To get a sense of the read reliability, smart labels are tested for their range.
Es ist eine Messvorrichtung bekannt, die eine kombinierte Sende- und Empfangseinheit (den sogenannten Reader) und eine mit dem Reader verbundene Antenne aufweist. Der Reader kommuniziert mit dem im Abstand zu der Antenne angeordneten zu prüfenden Smart Label kontaktlos mit einem standardisierten Daten Protokoll.A measuring device is known which has a combined transmitting and receiving unit (the so-called reader) and an antenna connected to the reader. The reader communicates contactlessly with a standardized data protocol with the smart label to be tested arranged at a distance from the antenna.
Der erreichbare Abstand für eine stabile Kommunikation zwischen dem Reader und dem Smart Label ist im Wesentlichen durch die Sendeleistung des Readers, den Aufbau der An- tenne und durch die Einflüsse der aktuellen Umgebung (z.B. Freifeld, metallische Flächen, Flüssigkeiten etc.) für die gesamte Übertragungsstrecke bestimmt. Bei Befestigung des Smart Labels auf einem Gegenstand kann auch dieser, je nach hochfrequenztechnischen Merkmalen, auch einen zusätzlichen Einfluss auf die Lesereichweite nehmen.The achievable distance for a stable communication between the reader and the smart label is essentially due to the transmission power of the reader, the structure of the and determined by the influences of the current environment (eg free field, metallic surfaces, liquids, etc.) for the entire transmission path. When the smart label is affixed to an object, it can also have an additional influence on the reading range, depending on the high-frequency features.
Die Lesezuverlässigkeit von (bereits auf dem Träger befestigten) Smart Labels wurde mit der bekannten Messvorrichtung getestet, indem die Sendeleistung des Readers konstant gehalten und der Abstand zwischen Smart Label und Readerantenne verändert wurde. Die Sendeleistung betrug dabei beispielsweise 0,5 Watt.The read reliability of smart labels (already mounted on the carrier) was tested with the known measuring device by keeping the transmitting power of the reader constant and changing the distance between the smart label and the reader antenna. The transmission power was for example 0.5 watts.
Der Bereich der Lesereichweite, also derjenige Bereich, in dem das Smart Label noch ausgelesen werden konnte, war das Maß für die Lesezuverlässigkeit. Die Lesezuverlässigkeit wurde für jedes Smart Label dokumentiert.The range of the reading range, ie the area in which the smart label could still be read, was the measure of the read reliability. Read reliability was documented for each smart label.
Nachteilig an dem bekannten Verfahren ist der Zeitfaktor. Es ist aufwendig, die Smart Labels über einen relativ weiten Bereich zu bewegen, um den Abriss der Kommunikation festzustellen. Darüber hinaus ergeben sich bei der bekannten Testvorrichtung Probleme in der Größe des Testaufbaus. Smart Labels können Reichweiten von mehreren Metern aufweisen, so dass auch die Testvorrichtung entsprechende Ausmaße aufweisen muss.A disadvantage of the known method is the time factor. It is laborious to move the smart labels over a relatively wide range to determine the demolition of the communication. In addition, arise in the known test device problems in the size of the test setup. Smart labels can have ranges of several meters, so that the test device must have corresponding dimensions.
Der Erfindung liegt die Aufgabe zugrunde, unter Behebung der geschilderten Nachteile eine Testvorrichtung zu schaffen, die in der Lage ist, Smart Labels schneller und mit geringerem vorrichtungstechnischen Aufwand auf ihre Lesezuverlässigkeit hin zu testen.The invention has for its object to provide a test device under the elimination of the disadvantages described, which is able to test smart labels faster and with lower device complexity on their reading reliability out.
Zur Lösung dieser Aufgabe weist die eingangs genannte Vorrichtung einen Reader, eine im Abstand zu dem Reader angeordnete Transporteinrichtung zur Aufnahme und zum Transport der Smart Labels, und eine Einrichtung zur Einstellung der Sendeleistung des Readers auf, wobei der Reader eine Readerantenne umfasst, deren Abstand zu der Transporteinrichtung veränderbar ist.To solve this problem, the device mentioned above a reader, arranged at a distance from the reader transport device for receiving and transporting the smart labels, and means for adjusting the transmission power of the reader, wherein the reader comprises a reader antenna whose distance to the transport device is changeable.
Durch die erfindungsgemäße Vorrichtung ist es möglich, über die verstellbare Antenne zunächst zur Anpassung der Wellenausbreitungscharakteristik an die Messanordnung eine günstige Voreinstellung des Abstands zwischen der Antenne und dem Smart Label vorzu- nehmen. Wesentlich in diesem Zusammenhang sind die Wellenminima und -maxima des jeweiligen Feldes.The device according to the invention makes it possible, via the adjustable antenna, first of all, to adapt the wave propagation characteristic to the measuring arrangement to provide a favorable presetting of the distance between the antenna and the smart label. to take. Essential in this context are the wave minima and maxima of the respective field.
Nach Einstellung des Abstands wird die Sendeleistung schrittweise reduziert und das Smart Label jeweils ausgelesen. Der Bereich, in dem das Smart Label reproduzierbar gelesen (und ggf. beschrieben) werden kann, bestimmt den Grad der Lesezuverlässigkeit. Mit dem erfindungsgemäßen Verfahren wird durch die Absenkung des Leistungspegels eine zunehmende Entfernung zwischen Prüfling und Sende-/Leseeinheit simuliert, so dass auch von einer „Fernfeld-Simulation" gesprochen werden kann.After setting the distance, the transmission power is gradually reduced and the smart label is read out in each case. The area in which the smart label can be reproducibly read (and possibly written) determines the degree of read reliability. With the method according to the invention an increasing distance between the test object and the transmitting / reading unit is simulated by lowering the power level, so that it is also possible to speak of a "far field simulation".
Grundsätzlich kann vorgesehen sein, dass der gesamte Reader (mit Antenne) zum Smart Label hin bewegt werden kann. Besonders vorteilhaft ist es jedoch, wenn nur die Antenne relativ zum Smart Label bewegbar ist. Dies verringert die bewegten Massen und steigert damit die Ansprechgenauigkeit und -geschwindigkeit.In principle, it can be provided that the entire reader (with antenna) can be moved towards the smart label. However, it is particularly advantageous if only the antenna is movable relative to the smart label. This reduces the moving masses and thus increases the response accuracy and speed.
Vorzugsweise weist die Transporteinrichtung ein Transportband auf. Die Smart Labels werden auf diesem Transportband in die Testvorrichtung transportiert, in der Testvorrichtung gelesen (bzw. beschrieben) und aus der Vorrichtung herausgeführt, wo sie anschließend entnommen werden können. Vorzugsweise ist ein Schrittmotor zum Antrieb des Transport- bandes vorgesehen, das im Übrigen auf Rollen umlaufen kann.Preferably, the transport device has a conveyor belt. The smart labels are transported on this conveyor belt into the test device, read in the test device (or described) and led out of the device, where they can then be removed. Preferably, a stepper motor for driving the conveyor belt is provided, which can otherwise rotate on rollers.
Bei einer wie zuvor beschriebenen taktweise arbeitenden Testvorrichtung ist darauf zu achten, dass nicht versehentlich mehrere Smart Labels zum gleichen Zeitpunkt gelesen werden. Dies verfälscht das Messergebnis. Vorteilhafterweise ist daher eine Abschirmung vorgese- hen, die dafür sorgt, dass der Reader nur mit einem Smart Label kommuniziert. Die anderen bereits gelesenen oder nachfolgenden Smart Labels werden abgeschirmt. Die Abschirmung wird man in einem geeigneten Abstand zu den Smart Labels anordnen. Als vorteilhaft hat sich ein geringer Abstand erwiesen.In a test device operating in cycles as described above, care must be taken to ensure that several smart labels are not accidentally read at the same time. This falsifies the measurement result. Advantageously, therefore, a shield is provided, which ensures that the reader only communicates with a smart label. The other already read or following smart labels are shielded. The shielding will be arranged at a suitable distance from the smart labels. As advantageous, a small distance has been found.
Es wurde bereits eingangs angedeutet, dass auch das (spätere) Trägermaterial des Smart Labels einen Einfluss auf die Lesereichweite, also die Lesezuverlässigkeit haben kann. Insofern ist es wünschenswert, einen Wert für die Lesezuverlässigkeit auch des „fertigen" Produkts zu erhalten. In wesentlicher Weiterbildung der Erfindung wird auf der dem Reader entgegengesetzten Seite des jeweiligen Smart Labels ein Basiselement angeordnet, das mit - A -It has already been indicated at the outset that the (later) carrier material of the smart label can also have an influence on the read range, ie the read reliability. In this respect, it is desirable to obtain a value for the read reliability of the "finished" product as well. <br/><br/> In essential development of the invention, a base element is arranged on the side of the respective smart label opposite the reader - A -
dem Smart Label zusammenwirkt. Das Basiselement kann mit dem Smart Label gekoppelt werden, wobei vorteilhaft die Lesezuverlässigkeit des Gesamtmoduls ermittelbar ist.interacts with the smart label. The base element can be coupled to the smart label, wherein advantageously the read reliability of the overall module can be determined.
Vorzugsweise ist der Abstand zwischen dem Basiselement und dem Smart Label veränder- bar.Preferably, the distance between the base member and the smart label is changeable.
Bei dem Basiselement kann es sich um den späteren Träger selbst handeln. Es kann jedoch auch vorgesehen sein, dass das Basiselement demjenigen Gegenstand entspricht, auf dem das Smart Label (später) aufgebracht wird. Besonders vorteilhaft ist es, wenn die physikali- sehen Eigenschaften des Basiselements demjenigen Gegenstand entsprechen, auf dem das Smart Label befestigt wird.The base element may be the later carrier itself. However, it can also be provided that the base element corresponds to the object on which the smart label (later) is applied. It is particularly advantageous if the physical properties of the base element correspond to the object on which the smart label is attached.
Von wesentlichem Ausschlag für die Messgenauigkeit ist auch die Umgebung, von der unerwünschte Störstrahlung ausgehen kann. Zur Steigerung der Messgenauigkeit wird daher vorgeschlagen, dass zumindest die Antenne und das zu testende Smart Label in einem Raum der Messvorrichtung angeordnet sind, der gegenüber der Umgebung hochfrequenzgedämpft (HF-gedämpft) ist. Dabei kann der Raum durch eine Messkammer gebildet sein, die zumindest auf ihrer Innenseite HF-dämpfendes Absorbermaterial aufweist. Die Außenwände bestehen zweckmäßigerweise aus Metall.Of major importance for the accuracy of measurement is also the environment from which unwanted spurious radiation can emanate. To increase the accuracy of measurement, it is therefore proposed that at least the antenna and the smart label to be tested are arranged in a space of the measuring device which is high-frequency-damped (RF-attenuated) with respect to the environment. In this case, the space may be formed by a measuring chamber which has at least on its inside RF-absorbing absorber material. The outer walls are suitably made of metal.
Eine bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass auch der Reader innerhalb der Messkammer angeordnet ist.A preferred embodiment of the invention is characterized in that the reader is also arranged inside the measuring chamber.
Die Aufgabe wird erfindungsgemäß ferner gelöst durch ein Verfahren zum Testen der Lese- Zuverlässigkeit von Smart Labels, wobei mindestens ein Smart Label in eine Messvorrichtung transportiert wird, die einen Reader und eine mit diesem gekoppelte Antenne aufweist, der Abstand zwischen der Antenne und dem Reader in einem ersten Schritt voreingestellt wird, und wobei in einem zweiten Schritt die Sendeleistung des Readers bei voreingestelltem Abstand der Antenne reduziert wird.The object is further achieved by a method for testing the read reliability of smart labels, wherein at least one smart label is transported in a measuring device having a reader and an antenna coupled thereto, the distance between the antenna and the reader in is preset in a first step, and wherein in a second step, the transmission power of the reader at a preset distance of the antenna is reduced.
Die mit dem erfindungsgemäßen Verfahren getesteten Smart Labels können anhand der ermittelten Leseempfindlichkeit klassifiziert werden. Dies bedeutet, dass für jedes Smart Label der ermittelte Pegel als Kennzahl festgelegt werden kann, mit dem auf die Lesereichweite des Smart Labels geschlossen werden kann. Vorzugsweise werden die Smart Labels schrittweise in die Messvorrichtung transportiert. Dies gewährleistet eine schnelle und kontinuierliche Testfolge.The smart labels tested with the method according to the invention can be classified on the basis of the determined reading sensitivity. This means that the determined level for each smart label can be defined as a key figure, which can be used to deduce the read range of the smart label. Preferably, the smart labels are gradually transported into the measuring device. This ensures a fast and continuous test sequence.
Ein hoher Durchsatz wird dadurch gewährleistet, dass mehrere Smart Labels hintereinander in die Messvorrichtung geführt werden, wobei jeweils nur ein Smart Label beschrieben oder ausgelesen wird und die übrigen abgeschirmt werden.A high throughput is ensured by the fact that several smart labels are consecutively fed into the measuring device, in each case only one smart label is described or read and the others are shielded.
Wie bereits vorstehend erläutert, kann auch das Trägermaterial des Smart Labels einen Ein- fluss auf die Lesereichweite des Smart Labels haben. In diesem Zusammenhang wird es als vorteilhaft angesehen, dass unter das Smart Label ein Basiselement geschoben wird, das mit dem Smart Label zusammenwirkt. Der Abstand zwischen dem Smart Label und dem Basiselement ist vorzugsweise veränderbar.As already explained above, the carrier material of the smart label can also have an influence on the read range of the smart label. In this context, it is considered advantageous that under the smart label a base element is pushed, which interacts with the smart label. The distance between the smart label and the base element is preferably changeable.
In Weiterbildung der Erfindung wird vorgeschlagen, dass zunächst ein Smart Label ohne Basiselement und anschließend das Smart Label mit Basiselement getestet wird. Dadurch kann der Unterschied der Leseempfindlichkeit mit und ohne Basiselement beurteilt werden und ggf. mit geeigneten Maßnahmen beeinflusst werden.In a further development of the invention, it is proposed that first a smart label without base element and then the smart label with base element is tested. As a result, the difference in reading sensitivity with and without base element can be assessed and possibly influenced by suitable measures.
Im Folgenden wird die Erfindung anhand eines bevorzugten Ausführungsbeispiels im Zusammenhang mit der anhängenden Zeichnung näher erläutert. Die Figur zeigt in:In the following the invention will be explained in more detail with reference to a preferred embodiment in conjunction with the attached drawings. The figure shows in:
Figur 1 eine erfindungsgemäße Vorrichtung zum Testen der Lesezuverlässigkeit von1 shows an inventive device for testing the read reliability of
Smart Labels.Smart Labels.
Figur 1 zeigt eine Vorrichtung 1 zum Testen der Lesereichweite von Smart Labels. Mit einer Transporteinrichtung 2 werden die einzelnen Smart Labels 3 durch eine Messkammer 4 transportiert. Dies geschieht schrittweise über ein Transportband 5. Die Smart Labels 3 werden also im Schrittverfahren getestet, wobei bei dem jeweiligen Lese- bzw. Schreibvorgang selbst die Smart Labels still stehen und nach erfolgtem Test weitertransportiert werden. Ein hoher Durchsatz bei gleichzeitig guter Messzuverlässigkeit ist die Folge.FIG. 1 shows a device 1 for testing the reading range of smart labels. With a transport device 2, the individual smart labels 3 are transported through a measuring chamber 4. This is done stepwise via a conveyor belt 5. The smart labels 3 are thus tested in the step method, wherein in the respective reading or writing process even the smart labels stand still and are transported further after a successful test. A high throughput with good measurement reliability is the result.
Die erfindungsgemäße Vorrichtung 1 weist einen Reader, also eine Lese-/Schreibeinheit 6 auf, der mit einer Readerantenne 7 gekoppelt ist. Die Antenne 7 ist in Richtung des Pfeils P1 beweglich. Dadurch kann der Abstand d zu den Smart Labels eingestellt werden, wie es im Folgenden noch näher ausgeführt wird.The device 1 according to the invention has a reader, that is to say a read / write unit 6, which is coupled to a reader antenna 7. The antenna 7 is in the direction of the arrow P1 movable. Thereby, the distance d to the smart labels can be set, as will be explained in more detail below.
Der Reader 6 dient zum Aussenden eines HF-Signals (Hochfrequenzsignals) an das jeweils zu testende Smart Label 8 und ggf. zum Empfang der von dem Smart Label abgegebenen Signale. Die Sendeleistung der Signale ist erfindungsgemäß einstellbar. Auf diese Weise kann ein unterschiedlicher Abstand zwischen der Antenne 7 und dem Smart Label 8 simuliert werden.The reader 6 is used to emit an RF signal (high-frequency signal) to the respectively to be tested smart label 8 and possibly to receive the output from the smart label signals. The transmission power of the signals is adjustable according to the invention. In this way, a different distance between the antenna 7 and the smart label 8 can be simulated.
Erfindungsgemäß wird in einem ersten Schritt der Abstand d zwischen der Antenne und dem zu testenden Smart Label 8 eingestellt, und zwar zur Anpassung der Wellenausbreitungscharakteristik (Minima und Maxima der HF-Welle) an die Messanordnung. In einem zweiten Schritt wird die Sendeleistung des Readers 6 schrittweise herabgesetzt und damit ein fortschreitender Abstand zwischen der Antenne 7 und dem Smart Label simuliert.According to the invention, in a first step, the distance d between the antenna and the smart label 8 to be tested is set, specifically to adapt the wave propagation characteristic (minimums and maximums of the HF wave) to the measuring arrangement. In a second step, the transmission power of the reader 6 is gradually reduced, thereby simulating a progressive distance between the antenna 7 and the smart label.
Zur Vermeidung von Störungen ist eine Abschirmung 9 derart angeordnet, dass nur das zu testende Smart Label 8 mit der Antenne kommuniziert. Die Abschirmung 9 kann blendenartig mit einer Öffnung 10 ausgebildet sein. Je nach Anwendung kann die Öffnung 10 in ihrer Größe einstellbar sein.To avoid interference, a shield 9 is arranged such that only the Smart Label 8 to be tested communicates with the antenna. The shield 9 may be formed like an aperture with an opening 10. Depending on the application, the opening 10 may be adjustable in size.
Unterhalb des Transportbandes 5 ist ein Basiselement 11 angeordnet. Dieses Basiselement entspricht in seinen Eigenschaften vorzugsweise dem Objekt, auf dem später das Smart Label angeordnet wird. Das Basiselement 1 1 wird von einer Stützeinrichtung 12 gehalten, wobei der Abstand zu dem Smart Label mittels einer Einstelleinrichtung 13 veränderbar ist, wie dies durch den Pfeil P2 angedeutet ist. Durch das Basiselement 1 1 können bereits bei der Messung spätere Gegebenheiten simuliert werden.Below the conveyor belt 5, a base member 11 is arranged. This basic element preferably corresponds in terms of its properties to the object on which the smart label is later arranged. The base element 1 1 is held by a support device 12, wherein the distance to the smart label by means of an adjusting device 13 is variable, as indicated by the arrow P2. By the base element 1 1 later circumstances can be simulated even during the measurement.
Die Messkammer 4 weist Seitenwände 14 aus Metall auf, die mit einem Absorbermaterial 15 ausgekleidet sind. Das Absorbermaterial dient zur UHF-Wellendämpfung. Auf diese Weise können äußere, das Messergebnis verfälschende Störungen vermieden werden. BezuqszeichenlisteThe measuring chamber 4 has side walls 14 made of metal, which are lined with an absorber material 15. The absorber material is used for UHF wave attenuation. In this way, external, the measurement result falsifying disturbances can be avoided. LIST OF REFERENCES
1 Vorrichtung1 device
2 Transporteinrichtung2 transport device
3 Smart Labels3 smart labels
4 Messkammer4 measuring chamber
5 Transportband5 conveyor belt
6 Reader6 readers
7 Antenne7 antenna
8 zu testende Smart Label8 smart labels to test
9 Abschirmung9 shielding
10 Öffnung10 opening
1 1 Basiselement1 1 base element
12 Stützeinrichtung12 support device
13 Einstelleinrichtung13 adjusting device
14 Seitenwände14 side walls
15 Absorbermaterial 15 absorber material

Claims

Vorrichtung und Verfahren zum Testen der Lesezuverlässigkeit von Smart LabelsPatentansprüche Apparatus and method for testing the read reliability of smart label claims
1. Vorrichtung zum Testen der Lesezuverlässigkeit von Smart Labels (3), mit1. Device for testing the read reliability of smart labels (3), with
- einem Reader (6),a reader (6),
- einer im Abstand zu dem Reader (6) angeordneten Transporteinrichtung (2) zur Aufnahme und zum Transport der Smart Labels (3), und- A spaced apart from the reader (6) arranged transport means (2) for receiving and transporting the smart labels (3), and
- einer Einrichtung zur Einstellung der Sendeleistung des Readers (6),a device for adjusting the transmission power of the reader (6),
- wobei der Reader (6) eine Readerantenne (7) aufweist, deren Abstand (d) zu der Transporteinrichtung (2) veränderbar ist.- wherein the reader (6) has a reader antenna (7) whose distance (d) to the transport device (2) is variable.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Antenne (7) relativ zum Reader (6) bewegbar ist.2. Apparatus according to claim 1, characterized in that the antenna (7) relative to the reader (6) is movable.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Transporteinrichtung (2) ein Transportband (5) aufweist.3. Apparatus according to claim 1 or 2, characterized in that the transport device (2) has a conveyor belt (5).
4. Vorrichtung nach einem der Ansprüche 1 - 3, gekennzeichnet durch eine Abschirmung (9), die vorzugsweise derart angeordnet ist, dass der Reader (6) jeweils nur mit einem zu testenden Smart Label (8) kommuniziert.4. Device according to one of claims 1-3, characterized by a shield (9), which is preferably arranged such that the reader (6) in each case communicates only with a smart label to be tested (8).
5. Vorrichtung nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, dass auf der dem Reader (6) entgegengesetzten Seite des zu testenden Smart Labels (8) ein Basiselement (1 1 ) angeordnet ist, das mit dem Smart Label zusammenwirkt.5. Device according to one of claims 1 - 4, characterized in that on the reader (6) opposite side of the smart label to be tested (8) a base element (1 1) is arranged, which cooperates with the smart label.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Abstand zwischen dem Basiselement (1 1 ) und dem zu testenden Smart Label (8) veränderbar ist.6. Apparatus according to claim 5, characterized in that the distance between the base element (1 1) and the smart label to be tested (8) is variable.
7. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass das Basiselement (1 1 ) demjenigen Gegenstand entspricht, auf dem das Smart Label befestigt wird. 7. Apparatus according to claim 5 or 6, characterized in that the base element (1 1) corresponds to the object on which the smart label is attached.
8. Vorrichtung nach einem der Ansprüche 5 - 7, dadurch gekennzeichnet, dass die physikalischen Eigenschaften des Basiselements (11 ) demjenigen Gegenstand entsprechen, auf dem das Smart Label aufgebracht wird.8. Device according to one of claims 5-7, characterized in that the physical properties of the base member (11) correspond to the object on which the smart label is applied.
9. Vorrichtung nach einem der Ansprüche 1 - 8, dadurch gekennzeichnet, dass zumindest die Antenne (7) und das zu testende Smart Label (8) in einem Raum (4) angeordnet sind, der gegenüber der Umgebung hochfrequenzgedämpft (HF-gedämpft) ist.9. Device according to one of claims 1-8, characterized in that at least the antenna (7) and the smart label to be tested (8) in a space (4) are arranged, which is high-frequency damped (RF-attenuated) with respect to the environment ,
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass der Raum durch eine Messkammer (4) gebildet ist, die zumindest auf ihrer Innenseite HF-dämpfendes Absorbermaterial (15) aufweist.10. The device according to claim 9, characterized in that the space is formed by a measuring chamber (4) having at least on its inside RF-damping absorber material (15).
11. Verfahren zum Testen der Lesezuverlässigkeit von Smart Labels (3), wobei11. A method for testing the read reliability of smart labels (3), wherein
- mindestens ein zu testendes Smart Label (8) in eine Messvorrichtung (1 ) transpor- tiert wird, die einen Reader (6) und eine mit diesem gekoppelte Antenne (7) aufweist,at least one smart label (8) to be tested is transported into a measuring device (1) which has a reader (6) and an antenna (7) coupled thereto,
- der Abstand zwischen der Antenne (7) und dem zu testenden Smart Label (8) in einem ersten Schritt voreingestellt wird, und wobei- the distance between the antenna (7) and the smart label to be tested (8) is preset in a first step, and wherein
- in einem zweiten Schritt die Sendeleistung des Readers (6) bei voreingestelltem Abstand (d) der Antenne (7) reduziert wird.- In a second step, the transmission power of the reader (6) at a preset distance (d) of the antenna (7) is reduced.
12. Verfahren nach Anspruch 11 , dadurch gekennzeichnet, dass die Smart Labels (3) schrittweise in die Messvorrichtung (1 ) transportiert werden.12. The method according to claim 11, characterized in that the smart labels (3) are transported stepwise into the measuring device (1).
13. Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass mehrere Smart Labels (3) hintereinander in die Messvorrichtung (1 ) geführt werden, wobei jeweils nur ein zu testendes Smart Label (8) beschrieben oder ausgelesen wird und die übrigen abgeschirmt werden.13. The method according to claim 11 or 12, characterized in that a plurality of smart labels (3) in a row in the measuring device (1) are guided, in each case only one to be tested smart label (8) is described or read and the rest are shielded.
14. Verfahren nach einem der Ansprüche 1 1 - 13, dadurch gekennzeichnet, dass unter das zu testende Smart Label (8) ein Basiselement (1 1 ) geschoben wird, das mit dem zu testenden Smart Label (8) zusammenwirkt.14. The method according to any one of claims 1 1 - 13, characterized in that under the Smart Label to be tested (8) a base element (1 1) is pushed, which cooperates with the Smart Label to be tested (8).
15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass der Abstand zwischen dem zu testenden Smart Label (8) und dem Basiselement (1 1 ) veränderbar ist. 15. The method according to claim 14, characterized in that the distance between the Smart Label to be tested (8) and the base element (1 1) is variable.
16. Verfahren nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass zunächst ein zu testendes Smart Label (8) ohne Basiselement (1 1 ) und anschließend das zu testende Smart Label (8) mit Basiselement (11 ) getestet wird. 16. The method according to claim 14 or 15, characterized in that first to be tested smart label (8) without base element (1 1) and then the tested Smart Label (8) is tested with base element (11).
EP06819367A 2005-11-17 2006-11-09 Apparatus and method for testing the reading reliability of smart labels Withdrawn EP1952314A1 (en)

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DE102005055381 2005-11-17
DE102006007423A DE102006007423A1 (en) 2005-11-17 2006-02-17 Apparatus and method for testing the read reliability of smart labels
PCT/EP2006/068290 WO2007057343A1 (en) 2005-11-17 2006-11-09 Apparatus and method for testing the reading reliability of smart labels

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