DD202352A5 - IDENTIFIZIERUNGSDATENTRAEGER-LESEGERAET - Google Patents

Abstract

An identification data carrier reading apparatus has a first array of flat spiral transmitting coils (8) housed on a printed circuit board (6) and a second array of corresponding flat spiral receiving coils (11) housed on a printed circuit board (7). Selective inhibition of the electromagnetic coupling between the transmitting coils and the receiving coils is effected by conductive inserts (13) disposed on a card-shaped identification data carrier (4) made of an insulating material, which is slid between the two arrays of coils so as to provide one encoded output from the receiver coils (11) for amplification and comparison in an electronic security control system (18-21).

Description

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identification data carrier reader

A field of application of the invention

The present invention relates to identification media readers, d. H. Devices for scanning electronically coded information residing on a flat identification medium, which is usually in card form, devices of this type are used, for example, in data protection systems for checking coded information residing on an identification card, generally applied to a security check before the owner of an identification medium gains access to a restricted area. In using such devices, the verification of the data contained on the identification data carrier can cause the automatic release of a door lock.

Characteristic of the known.technical solutions

A known embodiment of such an identification data carrier reading device is described in GB-PS 1 459 and comprises a combination of components for generating a variable magnetic field, such an arrangement of coils, each of which by a substantially planar spiral of conductive material on a substantially planar insulating pad is formed, for the generation of corresponding signals in response to changes of said magnetic field and a receiving area for the receipt of a Identie-. Magnetic data carrier, which has magnetic field influencing elements. The task of these elements is the

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to reduce electromagnetic coupling between the magnetic field generating elements and some of said coils depending on the arrangement of the magnetic field influencing elements, wherein when such an identification medium is in the receiving area, the signals through the respective coils correspond to the arrangement of the magnetic field influencing elements of the identification information medium be generated.

The magnetic field generating elements of the identification medium carrier reader described and claimed in British Patent No. 1,459,185 are designed to build up a dynamic, variable magnetic field across the receiving area of the identification data carrier. The magnetic field generating elements may include a plurality of magnetic cores and winding elements for substantially simultaneous excitation of the core, either in the form of single windings - one for each individual core - which are electrically connected together, or in the form of a number of windings which are the same enclose large area with an array of coils, and contains a number of magnetic cores. The purpose of the winding elements and the associated cores is to generate magnetic fields of the same field strength in each of the coils of the assembly.

Object of the invention

The aim of the invention is to avoid the aforementioned disadvantages of the prior art.

Explanation of the essence of the invention .

The invention has for its object to provide an improved identification data carrier reading device, in which the components for the production of the variable

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union magnetic field are made simpler and more compact than the corresponding components, which are described in GB-PS 1,459,185.

According to the present invention, there is provided an identification data carrier reading apparatus comprising a first array of placket spiral transmitting coils for generating a spatially varying magnetic field and a second array of pleated spiral receiving coils arranged parallel to and from the first coil group through a receiving receiving area Identification data carrier is separated, having the magnetic field modifying elements in a predetermined manner in such a way that when an identification data carrier of this kind is inserted into the Äufnahmebereich, in the receiving coil induced by the magnetic field of the transmitting coil signals corresponding to the arrangement of the magnetic field modifying elements' of the identification data carrier.

The use of an arrangement of pach spiral coils for generating the required variable magnetic field in the Aufna.hmebereich the identification data carrier allows adequate differentiation of the magnetic Peldes by the receiving coil, without resorting to the components described in GB-PS 1,459,185 for the generation of the magnetic field would. Accordingly, the power consumption of the identification media reader to which the magnetic field generating placket coil assembly of the present invention is applied is substantially reduced as compared to the power consumption of comparable prior art identification disk readers described by British Patent 1,459, the disclosure of which is incorporated herein by reference Reduction by a factor of 50: 1 can be described as typical.

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The identification data carrier reading device according to the present invention also has the advantage of simplicity among the. Manufacturing aspect, since the arrangement of Flachspiralsendespulen with the arrangement of Flachspiralempfangsspulen in the embodiment is substantially identical. The two arrays of coils can each be accommodated on parallel planar insulating layer pads. In a preferred embodiment of the present invention, each coil assembly would be in the form of a printed circuit on an insulating carrier.

The identification medium for the identification medium reading device according to the present invention preferably consists of a sheet-like body of an insulating material or a non-magnetic material which accommodates a number of conductive or magnetic elements which are concealed in the optical device body and in a predetermined configuration are arranged.

The identification media reader may further include electronic comparators for comparing the signals induced in the receiver coils with comparison codes derived, for example, from a keyboard and / or stored data, depending on the output of the comparators, whether an inserted identification medium is accepted or is rejected. If the inserted identification information medium is accepted by the comparator, this generates an output signal which can be used, for example, to release a door lock. With the aid of such a device, it is possible to identify owners of identification data carriers at an attention control point and through the deployment

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of the identification data carrier reading device for controlling the operation of a door lock, restricting access to the owners of certain identification data carriers,

In a preferred embodiment of the present invention, the receiving coils are connected to respective capacitors so that they form with the coils each resonant circuits, which are connected to the detector elements.

The resonant circuits are preferably connected via switching elements to a common detector circuit. The switching elements may be an electronic circuit or an electronically controlled reusable scarf device.

In troduction e1spi e1 ·

The invention will be described in more detail below with reference to the accompanying schematic drawings. In it show: '... ·.

Pig, 1: a practical application of an identification data carrier reading device according to the invention,

Pig. FIG. 2 is a diagrammatic view illustrating the overall structure of an identification medium reading apparatus according to an embodiment of the invention; FIG.

3 is a plan view of the identification data carrier reader illustrated in FIGS. "

Fig. 4 is a plan view corresponding to Fig. 3 but showing an identification medium reading apparatus according to another embodiment of the invention;

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In the drawings, the same reference numerals are used throughout to designate the same or equivalent parts of the invention.

Pig "Figure 1 illustrates a schematic representation of a mounted on a wall identification data medium reading device 1, which communicates with an electromechanical door lock 2 in compound -The identification data medium reading device 1 has a receiving slot _3} in an identification. _; The ID card reader 1 also has a manual entry keypad 5 on which an ID or ID number is entered by the owner of the ID card. ,.

The identification information volume reading device 1 compares a number or other data present on the identification information medium 4 in coded form with the identification number entered on the keypad 5, and releases the door lock 2 only when an im predetermined correspondence has been established between the identification tag code and the "identification or identification number."

The pig. Figures 2 and 3 illustrate in diagrammatic form an embodiment of the identification data carrier reading device 1 according to the present invention, the identification data carrier 4 being in the form of a card consisting of, for example, a multilayer plastic material and inserted through the receiving slot 3 into a receiving area passing through two parallel planar insulating material pads are formed, which are formed by printed circuit boards 6 and 7

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The printed circuit board 6 is provided with a first array of flat spiral transmitting coils 8 applied to the circuit board 6. The transmit coils 8 are nine turn coils which are applied in a (5χ5) arrangement, in this example, where "the coils are in a circuit which includes a proximity switch or other suitable switch 10 so arranged that it only closes the circuit when the identification carrier 4 has been fully inserted into the receiving area, are electrically connected in series with an AC power source 9,.

The printed circuit board 7 is provided with a second array of flat spiral receiving coils 11, each of which is in the form of a nine-turn planar coil and mounted on the circuit board 7, which are each connected individually to capacitors 15 connected to the The arrangement of receiving coils 11 is identical in its design to the arrangement of transmitting coils 8, so that the corresponding transmitting coils 8 and receiving coils 11 are aligned in pairs coaxially with each other through the receiving area of the identification data carrier.

The card-shaped identification data carrier 4 is provided with a number of inserts 13 of a conductive material,

advantageously made of aluminum foil - provided which are arranged and aligned at predetermined locations with a selected pair of transmitting and Empfangsspu- 'leeh 8 and 11, when the identification data carrier 4' has fully inserted into the receiving slot 3, the bodies, on which the inserts 13 are arranged are concealed by the lamination of the identification data carrier and correspond to a coded number which is assigned to the owner of the identification data carrier as a personal data carrier.

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has been assigned. With the aim of complicating counterfeiting of the identification data carrier, the seats of the conductive inserts 13 can be concealed by providing additional conductive inserts within the identification data carrier which will not interfere with the coils 8 and 10 when the identification data carrier has been inserted into the receiving slot 11, or dummies of inserts of non-conductive material may be provided. The inserts 13 counteract the full electromagnetic coupling between certain transmitting coils 8 and the associated receiving coils 11, and then, when the identification data carrier 4 has been fully inserted into the Aufnahmeschl.itζ 3, is in those receiving coils 11, shielded by conductive inserts 13 be induced virtually no power. The spatial proximity of the conductive inserts 13 also effectively damps and detunes the corresponding resonant circuits 16; Consequently, there is a strong contrast between the outputs of the resonant circuits 16 in the absence of an insert 13 and the outputs of the same coils. In the case of immediate spatial proximity to an insert 13, the signal sequence generated with the aid of the resonant circuits 16 essentially becomes the arrangement of the inserts 13 in the identification data carrier 4.

The capacitors 15 of the resonant circuits 16 are connected to a common amplitude detector 17, via a sampling switch or multiplexer 18, which serves to connect each individual resonant circuit 16 alternately to the detector 17.

The multiplexer 18 represents a solid-state circuit controlled by control signals derived from a controller 19 which is

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a counter, a timer or a microprocessor can act. The output of the detector 17 is passed on to an amplifier 20 whose output consists of a signal sequence which uniquely represents the number coded by means of the individual inserts 13 in the order predetermined by the multiplexer 18,

The signals output by your amplifier 20 are compared in a comparator 21 with a comparison number or a comparison code obtained from the owner of the identification data carrier by means of the keypad

5 has been entered. The electronic circuit of the comparator 21 may be constructed in any conventional form; for example, as described in GB-PS 1,459,185. Components of the comparator circuit may be on the printed circuit boards

6 and 7 are housed.

The multiplexer 18 may be controlled by a microprocessor in the controller 19 to sense the voltage applied to any selected resonant circuit 16 for the purpose of plotting the location of the conductive inserts 13 in the identification media 4. The multiplexer controller 19 may include a microprocessor, and this microprocessor may also perform the puncture of the code comparator 21. "

In the alternative embodiment described in the Pig. 4, a second array of flat spiral receiving coils 11 are housed on the printed circuit board, each of which is applied to the printed circuit board 7 in the form of a seven coil planar coil, and each connected individually to respective transistor amplifiers 12 The arrangement of receiving coils 11 is in their execution

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identical to the arrangement of transmitting coils 8, so that the corresponding transmitting coils 8 and receiving coils 11 are aligned in pairs coaxially with each other through the receiving area of the identification data carrier. ...

The transistor amplifiers 12, which are energized in the presence of a card-shaped identification medium 4, will correspond to the placement of the inserts 13 in the identification medium 4, and the signals generated by the transistor amplifiers 12 will unambiguously represent the number encoded by the arrangement of the inserts 13 wMer.

The arrangement of signals output by the transistor amplifiers 12 is compared with a comparison number or a comparison code input by the owner of the identification data carrier using the keypad 5.

It will be understood that identification media readers in accordance with the present invention are suitable for a wide range of practical applications in addition to the particular application described in this specification. For example, in the illustrated use of the identification media reader in electronic door lock controllers, it is possible to deploy the identification media reader in employee identification and employee movement detection systems. For example, in cases where employees are employed on a flexible-time basis ("flexi-time"), the identification media reader may be used to provide information regarding the arrival and departure times of owners of identification media to a recording or storage device Storage system that can be centralized, forwarding,

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from which the possibility arises to separately record the hours worked by each owner of an identification data carrier. On the other hand, when using the identification media reader in an employee movement detection system, each employee would own an identification media bearing his personal identification code and the keypad of the identification media reader would be used by the owner of the identification media such as a local or centralized one Storage device - to give a message about the intended destination of this employee. Such employee movement tracking or employee tracking systems may be used for safety or security reasons, such as maintaining an up-to-date list of employees on an oil rig or in a mining operation. are located. In the two examples mentioned above, the identification data carrier reading device actually undertakes the puncturing of a data station for a local or centralized storage system.

Claims (9)

22. 12. 1981 o, _17Qfi 7 ⁵⁹⁵¹¹ Λ " 317 3o / - is - invention claim 1. A sart type identification data carrier reading apparatus comprising spatially variable magnetic field generating elements and receiving coils spatially separated from the magnetic field generating elements by an identification data carrier receiving area provided with magnetic field influencing elements in a predetermined arrangement is provided so that when the identification data carrier is inserted into the receiving area, the signals induced in the receiving coil by the electromagnetic field correspond to the arrangement of the magnetic field influencing elements of the identification data carrier, characterized in that the magnetic field generating elements comprise a first arrangement of Flachspiralsendespulen (8) and in that the receiving coils are arranged as a second arrangement of flat spiral coils (11) parallel to the first arrangement of coils. 2 * Identification disk reader according to item 1, characterized in that the identification data carrier (4) consists of a sheet-like body of an insulating material, which is provided with a number of conductive elements (13) which are concealed in the insulating material and in a are arranged in a predetermined configuration. 3. Identification disk reader according to item 1 or item 2, characterized in that the first and the second arrangement of coils (8, 11) in the form of · printed circuit boards on parallel planar insulating layer pads. (6, 7) are applied. 22. 12. 1981 231798 7 -.3- "" "" 4. Identification data carrier reading device according to items 1 to 3j, characterized in that the device includes electronic comparators (21) whose task is to compare the signal induced in the receiver coils (11) with a reference signal obtained, for example, from a keypad ( 5) is received, wherein the Yergleichsglieder produce an output signal when the received coil signal and the reference signal in a predetermined relationship to each other. Identification data carrier reading device according to any one of the preceding points, characterized in that it is used together with an identification data carrier which consists of a planar body (4) made of an insulating material or a non-magnetic material comprising a number of conductive or magnetic elements ( 13) which are arranged in the flat body (4) in concealed form and in a predetermined configuration, An identification data carrier reading device according to any one of the preceding points, characterized in that the receiving coils (11) are connected to respective resonant circuits (16) which are connected to detector members (17 to 19). T. Identification disk reader according to item 6, characterized in that each receiving coil (11) is connected in each case to a capacitor (15) which forms one of said resonant circuits (16) with the coil. 22. 12, 1981 _A - 59 511/13 231798 7 -η- 8. Identification data carrier reading device according to item 7, characterized in that the resonant circuits (16) via switching elements (18, 19) are connected to a common detector circuit (17). 9 * Identification disk reader according to item S, characterized in that the switching elements (18, 19) comprise an electronic multiplexing circuit or an electronically controlled multi-way switching device. An identification medium reading apparatus according to any one of items 1 to 6, characterized in that said dummy coils (11) are respectively connected to transistor amplifiers (12). For this 2 pages drawings