EP0732011A1 - Procede et dispositif de demande d'informations sans fil - Google Patents

Procede et dispositif de demande d'informations sans fil

Info

Publication number
EP0732011A1
EP0732011A1 EP95928976A EP95928976A EP0732011A1 EP 0732011 A1 EP0732011 A1 EP 0732011A1 EP 95928976 A EP95928976 A EP 95928976A EP 95928976 A EP95928976 A EP 95928976A EP 0732011 A1 EP0732011 A1 EP 0732011A1
Authority
EP
European Patent Office
Prior art keywords
capacitance
inductance
station
conductive substance
electrically conductive
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Withdrawn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
EP95928976A
Other languages
German (de)
English (en)
Inventor
Gerhard Kirchhoff
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.)
VWB GmbH
Original Assignee
Dorma Deutschland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dorma Deutschland GmbH filed Critical Dorma Deutschland GmbH
Publication of EP0732011A1 publication Critical patent/EP0732011A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/22—Capacitive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/143—Inductive couplings for signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/45—Transponders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation

Definitions

  • the invention relates to a device for a device for wireless information retrieval.
  • an answering station supplies the polling station with the necessary energy and the corresponding information by means of a wireless polling signal.
  • This includes, for example, a device that is supplied with the necessary energy wirelessly via a reading device and also wirelessly transmits the information to an interrogation station, the reading station being able to be moved over a predetermined distance during the reading process.
  • the invention includes a method for producing such a device.
  • a portable, field-programmable detector plate has been described in European patent application 0441 237.
  • an inductance is used for energy transmission and also for sending the data.
  • a field trial is also programming possible.
  • the data are transmitted by pulse pause modulation and digitally evaluated.
  • the object of the invention is to provide a device for energy transmission and for reading and writing data, which is very simple and inexpensive to be mass-produced inexpensively.
  • an inductance which is provided with a carrier.
  • This inductance can, for example, be wound, etched or also vapor-deposited onto the corresponding carrier material.
  • a self-supporting inductor instead of the carrier, which is so dimensionally stable as a coil that it does not lose its shape even under mechanical stress.
  • a high-resistance but conductive substance is then applied to this inductance.
  • This substance represents the capacitor surfaces and is therefore to be produced from two geometrically independent structures which are not connected to one another but are located one inside the other. It is absolutely necessary for the conductive substance that its electrical resistance value is very high-impedance, because this does not affect the magnetic fields of the inductance.
  • this substance must also be so low-resistance that a perfect capacitive transmission of information is guaranteed.
  • the capacitor areas lie directly above the inductance, which makes it clear that the conductive substance must not have a low resistance, since otherwise it would represent a short circuit in itself and also for the radiation field of the inductance.
  • This close coupling of the inductance and the capacitance in the smallest space makes it possible, for example, to produce a response station which works according to the transponder system, can communicate with the stationary station and is also inexpensive to produce, namely by virtue of the fact that a thin credit card format, for example built response station can be realized.
  • the capacitor surfaces can be placed one inside the other.
  • a carbon varnish for example, can be used as the conductive substance, which is very high-resistance and therefore does not represent a short-circuit ring for the capacitance.
  • the carbon varnish is to be understood as a conductive varnish, which is preferably produced as a two-component screen printing varnish.
  • This carbon-conductive varnish has been enriched with a special carbon black and / or a special type of graphite, so that it has sufficient electrical conductivity. In addition to the conductivity, such a lacquer also has a very high mechanical strength.
  • Such a lacquer can also be used for soldering tapes, so that contacting does not pose any difficulties, and likewise no changes in the resistance value can be determined after hot tinning.
  • it can be enriched, for example, with a two-component insulating paste. Such an approach does not influence the inductance. Capacitive feeding of the device is therefore possible.
  • a device of the type described enables capacitive data transmission in any position with the simultaneous advantage of the high reading distance. It is possible, for example, to use full-duplex operation with such a device be carried out, ie with the transmission of energy it is also possible to query and send data.
  • inductance and capacitor are virtually in one plane or are placed directly next to one another.
  • in one plane means that when they are designed as a thin element without a corresponding support, they lie directly in front of one another.
  • a conductive substance e.g. a carbon varnish or any other conductive substance because it has a very high resistance to the existing inductance and is sufficiently conductive as a capacitive surface.
  • a resist varnish is applied by placing stencils at the locations of the device where a capacitor surface is to be produced.
  • the varnish can be applied by spraying, brushing or printing (screen printing).
  • the thickness of the order also determines the resistance value.
  • all other high-resistance materials can be used, which can be applied by the aforementioned manner.
  • it is also possible to use correspondingly conductive plastics or foils, the resistance value of which is correspondingly high-ohmic and at the same time can be used as a capacitive material.
  • the size of the capacitive areas depends on the application, but the geometric shape of these areas is completely independent and can therefore be easily adapted to the requirements of the market.
  • the capacitor surfaces can have an annular or circular shape such that they lie inside one another.
  • the capacitor areas do not have to be closed, they can also be open at one point, only in such a case a larger active area is required for the capacitance.
  • Figure 1 a circular and annular capacitor surface
  • Figure 2 shows a section AA through this capacitor surface according to Figure
  • Figure 4 a section B-B through the capacitor surfaces of Figure 3 with inductance
  • Figure 5 shows a section through the arrangement of the capacitor surface
  • FIG. 1 shows a circular capacitor area 2, around which a second capacitor area 2 is placed in an annular manner. There is an intermediate space between the two capacitor surfaces 1 and 2, which acts as a dielectric 15 between the plates.
  • the capacitance 12 created in this way is applied as described above by a high-resistance conductive substance in conjunction with the corresponding method.
  • the contacts required for connecting the connecting lines are not shown in this illustration.
  • the capacitor areas 1 and 2 are located on a carrier 3 on its side 11.
  • This carrier 3 can be, for example, a film or some other suitable electrically non-conductive material.
  • the inductor 4 is located on the opposite side 10 of the carrier 3. As previously described, this inductor can be positively connected to the carrier 3 by etching, vapor deposition or as a winding body.
  • This type of representation makes it clear that there is a very close coupling, in particular, between the capacitor 12 with its capacitor areas 1 and 2 and the capacitance 4. However, this close coupling is only possible insofar as the capacitor surfaces 1 and 2 consist of a high-resistance conductive substance. If this were not the case, the magnetic field of the inductor would be short-circuited.
  • FIG. 1 A variant of a capacitor is shown in FIG.
  • a capacitance 14 is formed from capacitor areas 5 and 6, which are located in the latter If there is no short circuit in each case. Rather, an interruption is present at any point in the annular capacitor surface 5. Furthermore, the inner capacitor surface 6 separated by the dielectric 15 is likewise of annular design and also has an interruption 14 at any point. If the capacitance 14 is formed in the manner described above, however, larger areas are necessary for a correspondingly equivalent capacitance, as described in FIG. 1.
  • FIG. 4 shows in section B-B of FIG. 3 that the capacitance 14 has been applied directly to the inductor 4. This is possible if the inductor 4 is a body which is stable in itself and which allows direct application of the high-resistance conductive substance.
  • a circuit 9 available for processing information or for storing information can, as shown in FIG. 5, be used with appropriate placement within the inductor.
  • the capacitor areas 1 and 2 on a carrier 3 are closely related to the inductance 8.
  • the contacting of the capacitor surfaces 1 and 2 by the carrier 3 can be made directly with the circuit 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Near-Field Transmission Systems (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)

Abstract

L'invention concerne un dispositif et un procédé de réalisation de demande d'informations sans fil. L'énergie ou les données sont transmises entre la station de réponse et la station d'interrogation de manière capacitive ou inductive. A cet effet, les capacités et les inductances sont étroitement couplées et les capacités sont réalisées dans une substance conductrice à grande valeur ohmique.
EP95928976A 1994-09-12 1995-08-25 Procede et dispositif de demande d'informations sans fil Withdrawn EP0732011A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4432324 1994-09-12
DE4432324A DE4432324A1 (de) 1994-09-13 1994-09-13 Vorrichtung f}r eine Einrichtung zur drahtlosen Informationsabfrage und Verfahren zur Herstellung der Vorrichtung
PCT/DE1995/001127 WO1996008880A1 (fr) 1994-09-12 1995-08-25 Procede et dispositif de demande d'informations sans fil

Publications (1)

Publication Number Publication Date
EP0732011A1 true EP0732011A1 (fr) 1996-09-18

Family

ID=6527941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95928976A Withdrawn EP0732011A1 (fr) 1994-09-12 1995-08-25 Procede et dispositif de demande d'informations sans fil

Country Status (11)

Country Link
US (1) US5841122A (fr)
EP (1) EP0732011A1 (fr)
CN (1) CN1134766A (fr)
CZ (1) CZ285611B6 (fr)
DE (1) DE4432324A1 (fr)
ES (1) ES2090002T1 (fr)
FI (1) FI962006L (fr)
HU (1) HUT76003A (fr)
PL (1) PL315117A1 (fr)
SK (1) SK59696A3 (fr)
WO (1) WO1996008880A1 (fr)

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Also Published As

Publication number Publication date
FI962006A0 (fi) 1996-05-10
ES2090002T1 (es) 1996-10-16
CZ285611B6 (cs) 1999-09-15
CN1134766A (zh) 1996-10-30
DE4432324A1 (de) 1996-03-14
HU9600991D0 (en) 1996-06-28
PL315117A1 (en) 1996-10-14
HUT76003A (en) 1997-06-30
WO1996008880A1 (fr) 1996-03-21
SK59696A3 (en) 1998-07-08
FI962006A7 (fi) 1996-05-10
US5841122A (en) 1998-11-24
CZ138496A3 (en) 1997-04-16
FI962006L (fi) 1996-05-10

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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