DE8233198U1 - CODE CARD FOR A READER - Google Patents

Description

Re. G 82 33 198.7 Annex to _; A gobe .v. »7./J2.83 Code card for a reader The invention relates to a code card for a reader that is with

equipped with a magnetic field sensor and through which the code tokens is moved through for electronic data evaluation.

Such cards are used, for example, for a controlled read-out at entrances, petrol stations, bank accounts and the like. All data carriers are magnetic strips, metal

ΐ masks for inductive scanning, electronically coded

it. Cards and cards with perforations in use.

An essential criterion for practical usability

10 such cards in all card systems consists in the extent to which the cards are protected against imitations or forgeries are. In the known designs one is content with the fact that high manufacturing conditions of the Card and its coding an unauthorized imitation eΓΙ 5 serious should. However, these measures place a burden on the manufacturing costs and achieve the desired level of security not down to the last consequence, especially because a primary, own authenticity check is missing, so that under Counterfeit cards can also be used in certain circumstances.

The object of the invention is therefore to provide a for all systems of code cards to create a suitable device / which serves exclusively to prevent an imitation or forgery the card with great security to prevent and at the same time

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to signal the attempted forgery. Furthermore, the additional Costs are in a favorable relationship to the valuable properties achieved.

According to the invention this is achieved with code cards of the treated type 5 characterized in that the code card _m is provided it is a «Wiegand wire that activates the magnetic field sensor for outputting a Frkennungssignals at the card run-through.

, As in the magazine "Elektronik" No. 7/1980 under the Headline: "An alternative magnetic sensor: The

Wiegand module "is executed, the solution to the

The present problem used the "Wiegand effect" in particular in that it determines the presence and change of a magnetic field by emitting an electrical pulse of several volts, the type of which is appropriate, without intermediate amplification to be processed as a detection signal. In the present

In the application, the Wiegand wire in the code card passes through a contactless magnetic field sensor when it passes through the reader and triggers the control signal for the computer.

As is evident from the above publication, is used ^at the iiiegandmodul useful due to its properties far in code cards only for storing encoded information. Since the Wiegand wire is monopolized in the trade, the falsification of the information is made more difficult, as is the effort required for material and production

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however does not seem sufficient; here the spontaneous one Forgery signaling is missing, which is caused by the measure according to the invention has been achieved "

Another advantage of the proposed invention is / that the Wiegand wire is used as a control element Code cards of all known systems because of the simplicity of its use is useful. The The length of the wire and its shape can be adapted to the given circumstances.

In this sense, the inventive use of the Wiegand wire is of high technical value, especially when the wire is used with code cards that are due to most exposed to forgery attempts because of their inexpensive and functionally reliable simplicity are. These are punch cards, with which the data is exclusively provided by appropriately arranged smiles are set in the map. Such cards are the subject of De-Gbm 7 900 331. The means disclosed there improve the conventional punch cards and increase their

Usability while maintaining the typical advantages,

So in particular cheap production, no susceptibility to failure and a large selection of materials.

The transfer of the present invention therefore results in an even higher value for this card system, since now the often criticized susceptibility to forgery is eliminated in an advantageous manner, whereby the effort for

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this security is very low in relation to success is »Through this inventive application there is a The obstacle to the perfect usability of the known, simple punch card is eliminated opposition.

Another feature of the invention is therefore their Use for punch cards with the following Me * ki \; I «n, made known by De-Gbm 7 900 331:

{ ) a) The punched card is provided with a middle row of holes running in the longitudinal direction of the card, which serves as a clock track for the electronic control of the card flow, with the clock track beginning or ending within an edge distance that is the same on the inlet side and the same on the trailing side.

b) The clock track is provided with a bit at both ends, which serves as an information unit for the evaluation processor of the reader is used.

^ Due to the combination of these advantageous according to the invention Features with the basic idea of the invention, the object is achieved in a way that the relevant Technology by increasing the quality with surprisingly simple Funds.

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Further details of the invention are explained with reference to the drawing, in which an exemplary embodiment of the invention is shown.
It shows:

Fig. 1 shows the schematic plan view the reader with the code card

Fig. 2 the enlarged section A / A from Fig. 1 «

[Q The reader labeled 1 is only shown in outline,

$ 10 since the electronic reading devices and the transit port devices for the passage of the code card 3 are known and do not belong to the subject of the invention *

The sensor head 2 of the magnetic field sensor with its magnet 2a is arranged in the passage 3a of the s 15 code card 3 in the reader 1, indicated by dashed lines. The Wiegand wire

f runs transversely to the direction of passage and is. * according to Fig. 2,

I completely embedded in the code card 3.

I / ν The code card 3 is known per se with a mean <och-I series T, which has functional advantages as a clock track

:. 20 results because it controls the card flow and within

a certain entry or trailing edge distance runs.

\ Furthermore, the code card has one at both ends

Bit 5 or 6, which serves as an information unit for the reading processor and an automatic position identification of the code

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ϊ card results, thereby simplifying the handling of the reader

is simplified.

When it passes through the reader, the code card 3 runs over with the Wiegand wire in the reader contactless the sensor head 2, whereby a detection signal is activated, the electrical strength for an immediate Processing, i.e. without signal processing, in the computer is sufficient.

C. Equipping the Code-Kurte with an impulse exciter

1.0 any other metal would be ineffective because the The sensor head is precisely matched to the specific properties of the Wiegand wire.

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Claims (1)

Re. G 82 33 198.7 Annex ζ. Input ν. 7.Ί2.83 Claim Ί Code card for a reader, which is equipped with a magnetic field sensor, characterized in that the code card \ 3) is provided with a Wiegand wire (4) to protect against counterfeiting, which activates the magnetic field sensor (2, 2a) O ^to emit a detection signal when the card is passed through .