EP0188476A1 - Mit magnetischen mitteln arbeitendes schloss mit zugehöriger passend codierter schlüsselkarte - Google Patents
Mit magnetischen mitteln arbeitendes schloss mit zugehöriger passend codierter schlüsselkarteInfo
- Publication number
- EP0188476A1 EP0188476A1 EP19850903262 EP85903262A EP0188476A1 EP 0188476 A1 EP0188476 A1 EP 0188476A1 EP 19850903262 EP19850903262 EP 19850903262 EP 85903262 A EP85903262 A EP 85903262A EP 0188476 A1 EP0188476 A1 EP 0188476A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lock
- holes
- plate
- key
- coding
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
- G07C9/00722—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with magnetic components, e.g. magnets, magnetic strips, metallic inserts
- G07C9/00738—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with magnetic components, e.g. magnets, magnetic strips, metallic inserts sensed by Hall effect devices
-
- 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
- G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
- G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
- G06K7/087—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors flux-sensitive, e.g. magnetic, detectors
Definitions
- the invention relates to a lock working with magnetic means with an associated, appropriately coded key card, in which the coding in rows in the direction of insertion is partly formed by magnetizable metal, which is invisibly embedded on both sides from the outside, with each row of information points containing a read head on the lock side is assigned to the plug-in level for the key card adjacent to a perpendicularly aligned permanent magnet and a magnetically sensitive semiconductor arranged in series with this in relation to the direction of flow, the output signals of which are converted into electrical voltages and are comparable with a lock-side stored, fixed setpoint coding and if they match with the key-side coding to unlock or release the lock.
- identification key systems serve to prevent the use of special technical facilities or to release a certain group of people using the identification key as a means of identification. Areas of application are therefore goods dispensing devices, liquid dispensing devices, opening devices for doors and barriers or the commissioning of machines and vehicles.
- identification key systems In addition to the conventional key systems, in which identification keys made of metal are used which, due to their shape, bring about mechanical or electromechanical unlocking, identification key systems are known in which rectangular plug-in cards consist of plastic or of metal foils embedded in plastic, which are inductive, capacitive, optically by light - or infrared light barriers can be scanned. A typical example of this are ID cards according to DE-B 29 20 012, in which the front and back are covered with film.
- a lock to be operated with a key it is known from DE-B 29 33 453 to provide a key body of rectangular cross-section made of non-magnetic material with upper and lower coding pieces made of soft magnetic material and to insert the key body into a reading head to actuate the lock consisting of two magnets, ring-shaped flux guide pieces and a Hall generator arranged in an air gap of the flow guide pieces.
- a magnetic shunt that is asymmetrical with respect to the Hall generator is produced through the central opening of the yoke, which is delimited by the flux guide pieces and the magnets, the position of the respective shunt in relation to the Hall generator controlling the direction of the magnetic flux through it and the respective one Code number of the associated information point defined.
- the Hall generator is penetrated by the magnetic flux in one direction and the other time in the opposite direction.
- Card-shaped keys which consist of three layers, the middle layer of which has coding holes and which are covered on the outside by layers which make the coding invisible, are known from GB-A 21 27 4.79 and DE-A 24 61 908 known.
- the middle layer is impervious to infrared radiation and can be formed, for example, by a perforated metal foil. Each is located on both sides of the insertion slot
- Row of holes assigned to infrared transmitter and infrared receiver The infrared receivers register the holes provided in rows in the middle layer each time a hole passes between the transmitter and the receiver while the key card is inserted into the lock.
- the coding is scanned after the key card has been inserted by means of a predetermined pattern of sensors which correspond in size and position to the pattern of the metal dots and the holes in the card.
- a predetermined pattern of sensors which correspond in size and position to the pattern of the metal dots and the holes in the card.
- Sensors which correspond in size and position to the pattern of the metal dots and the holes in the card.
- the scanning is thus inductive and static.
- the inserts embedded in plastic consist of magnetizable metal.
- no metal insert is provided in a row that is detected by one of two magnet-sensitive semiconductors that respond to the Hall effect.
- This series embodies the one of two logical states for the criterion evaluated in the trigger circuit, whether the key card inserted into the lock is a key card that is suitable for the lock or a counterfeit key card, for example made entirely of magnetizable metal.
- the invention has for its object to provide a lock / key system in the manner of a key system of the type mentioned, which has the advantages of high strength, an externally covered, also.
- This object is achieved in that the coding is produced by punching holes in a plate made of magnetizable metal, that the hole pattern is designed such that clock pulses can be derived during insertion of the key card to enable serial reading of the coding and that magnetically sensitive semiconductor is designed as a field plate and a reading head is assigned to each row of holes.
- the key-side coding is determined here by the arrangement of the holes running in rows in the key card itself. These holes are arranged in each row within a middle plate, which is preferably made entirely of magnetizable metal, according to an identification key system at certain distances and a certain number from one another.
- a hole matrix known per se within a plate made of magnetizable metal offers a large number of different combinations and thus a high degree of encryption.
- the metal forms a low magnetic resistance between two holes, whereas when the key card is inserted into the lock, the transition between the metal surface and a hole causes a change in the magnetic field line and thus a sudden change in the magnetic induction, which is caused by measured value conversion can be evaluated as electrical counting signals in the field plate penetrated by the magnetic field of the permanent magnet.
- An intensive flow of field lines through the field plate results when it is arranged, for example glued, in the pole shoe of the permanent magnet corresponding to the N pole with the interposition of a carrier.
- Such field plates are subject to the longitudinal Hall effect or Gaussian effect.
- the charge carriers passing through such semiconductors are laterally deflected by the action of the transverse magnetic field, the path of the charge carriers being extended with an increasing magnetic field and the electrical resistance in the field plate thereby being increased. Electrical count signals obtained in this way are then fed to the evaluation circuit.
- one of the outer plates covering the plate having the holes has an edge which is crimped in accordance with the thickness of the central plate and which is firmly connected to the edge of the respective other plate.
- the flanged edge is formed in a Z-shape and is firmly connected to the edge of the other covering plate with a flat surface, receiving the metal plate between them.
- one of the rows of holes is completely covered with holes arranged at equidistant intervals, which form an additional clock track. Regardless of the speed and uniformity with which a user inserts the key card into the slot of the lock, at any time determined by the clock track the associated column of the row is scanned for information points during the insertion of the key card and the key-side coding in the lock-side evaluation or identification circuit is compared with the fixed target value coding stored there. If the codes in the key card and in the evaluation circuit match, the device to which access is to be created can be opened or started.
- the plate containing the information points consists of non-magnetizable material and has a plurality of rows arranged, punched holes, which are filled with ferromagnetic material according to the predetermined coding, which with the read head arranged in the lock when inserting the Key card in the lock interacts magnetically.
- Embedding flux guide pieces made of ferromagnetic material in key bodies made of non-magnetizable material is known per se from DE-A 31 44 616.
- the distances between the individual information points of an information track are the same size in this known key body.
- the value of the individual information points is embodied by flux guide pieces of different magnetic resistance or flux guide pieces with the same magnetic resistance are used and flux guide plates are assigned to them, which form a magnetic shunt.
- the production of the code elements that can be used in a recess of the key is very complex in this known construction, since the flow guide pieces and flow guide plates embodying the different code values have to be milled, punched and glued.
- a code-like composition is required for code elements with coding according to a higher-value code.
- Figure 1 shows a cross section through the key card along the line I-I in Figure 3;
- Figure 2 the lock-side insertion opening for the key card
- Figure 4 shows a cross section through the key card inserted into the lock with a reading head assigned to a row of holes when the magnetic field passes through the metal plate of the key card between two holes in each case;
- Figure 5 shows a cross section corresponding to Figure 4 when the magnetic field passes through one of the holes in the key card.
- Figure 6 shows a cross section through the key card on an enlarged scale according to line II in Figure 3 according to a second embodiment;
- Figure 7 shows a corresponding cross section according to another embodiment.
- the key card essentially consists of a plate 3 made of metal with a plurality of rows running in the direction of insertion of the key card and having holes arranged according to a key system 4. The number of holes and the spacing between the holes in each row of holes the coding of the key card in relation to the predetermined lock-side coding.
- the plate 3 consists of non-magnetizable material, the holes provided in this plate being filled with ferromagnetic material.
- circular metal discs are punched into the holes.
- the holes 4 can additionally be filled with iron powder 3a, it being expedient to cover the holes on both sides with a magnetically permeable binder.
- the plate 3 is covered by plates 1 and 2 made of non-magnetizable material, which makes the hole pattern invisible to the outside.
- One covering plate 1 has a z-shaped edge which is crimped according to the thickness of the plate 3 and which forms a frame 5 with the flat edge of the plate 2 and after inserting the plate 3 is firmly connected to the edge of the plate 2. This results in an asymmetrical profile of the key card in the longitudinal cross section, which matches the profile of the lock-side insertion opening 8.
- the key card is provided on one end face with a mouthpiece 7, the direction of insertion of the key card into the lock being marked by an arrow pointing towards the mouthpiece 7.
- Each row of holes is assigned a reading head, which consists of a permanent magnet 9 and a transducer 6.
- the permanent magnet 9 is oriented in such a way that its magnetic field emerging from one pole piece penetrates a portion of the slot behind the lock-side insertion opening 8 before it re-enters the other pole piece.
- a so-called field plate which is applied to the one pole shoe and which represents a magnetically controllable resistance, the influence of which is based on the longitudinal Hall effect or Gaussian effect, is used as the measured value converter 6.
- the charge carriers passing through the semiconductor are deflected laterally by the action of the transverse magnetic field, the path of the charge carriers being extended with an increasing magnetic field.
- a hole that is air, and the metal of the plate 3 located between two holes alternately get into the leakage flux of the permanent magnet.
- a signal is generated by deflecting the bias field with the help of the passing metal area between two holes, as is the case with this Figure 4 indicates symbolically.
- the leakage flux escaping is increased and the field plate resistance increases.
- the leakage flux that emerges is reduced and, as indicated in FIG. 5, gives way to those adjacent to the hole
- Each change between air and metal has a sudden change in the magnetic flux through the field plate acting as a transducer 6, which generates a current surge which is supplied as a counting pulse via lines R to an evaluation circuit, not shown in the drawing.
- the logic of the evaluation circuit is chosen so that regardless of the speed and the uniformity with which the key card is inserted into the lock, a correlation is always created between the individual rows of holes.
- the key card with the hole pattern according to Figure 3 is a key card that matches the associated lock
- the coding matches the lock-side, predefined coding if, when the key card is inserted into the lock, all four transducers holes in the last Show picture 3 on the line II.
- the places where there are no holes form information gaps that are noticeable when a counting pulse fails.
- the left row of holes in the top view of the key card according to Figure 3 is completely filled with holes puts. These holes generate clock signals for which, depending on the position of the key card in the lock, one, two or three counts are generated in the remaining three rows.
- Clock and counting pulses can be temporarily stored in the evaluation circuit until the key card has been completely inserted into the opening 8 on the lock side.
- the comparison then made with the lock-side coding then leads to an actuation of the lock, for example to an opening or activation of the device, if the codes have been found to match.
- the invention is not restricted to the exemplary embodiment explained. Versions are conceivable in which an annular permanent magnet is provided instead of a rod-shaped one and has an air gap corresponding to the width of the insertion slot.
- the magnetic field concentrates on the cross section of the air gap.
- the metal plate can be provided with narrow slits running transversely to the direction of insertion, whereby a very precise response of the transducers can be achieved, since there are straight edges between metal and air, on which the magnetic force flow changes abruptly when the key card is moved .
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Lock And Its Accessories (AREA)
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3423714 | 1984-06-27 | ||
DE19843423714 DE3423714C1 (de) | 1984-06-27 | 1984-06-27 | Mit magnetischen Mitteln arbeitendes Schloß mit zugehöriger passend codierter Schlüsselkarte |
DE19843435030 DE3435030A1 (de) | 1984-09-24 | 1984-09-24 | Mit magnetischen mitteln arbeitendes schloss mit zugehoeriger passender schluesselkarte |
DE3435030 | 1984-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0188476A1 true EP0188476A1 (de) | 1986-07-30 |
Family
ID=25822453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850903262 Ceased EP0188476A1 (de) | 1984-06-27 | 1985-06-26 | Mit magnetischen mitteln arbeitendes schloss mit zugehöriger passend codierter schlüsselkarte |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0188476A1 (de) |
WO (1) | WO1986000364A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0619933A (ja) * | 1992-05-11 | 1994-01-28 | Nobuyuki Sonoya | 無形信号販売集計システム |
DE102016013283A1 (de) * | 2016-11-08 | 2018-05-09 | Liebherr-Hausgeräte Lienz Gmbh | Kühl- und/oder Gefriergerät |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1471893A (fr) * | 1965-03-24 | 1967-03-03 | Siemens Ag | Porteur d'informations à exploration galvanomagnétique comportant un organe d'exploration |
DE2154114A1 (de) * | 1971-10-29 | 1973-05-10 | Ddm Hopt Schuler Fa | Datenverwertungssystem |
CH556068A (fr) * | 1972-01-03 | 1974-11-15 | Sodeco Compteurs De Geneve | Appareil lecteur de cartes d'identification. |
US3896292A (en) * | 1973-06-18 | 1975-07-22 | Michael May | Hall effect position coded card detector |
-
1985
- 1985-06-26 EP EP19850903262 patent/EP0188476A1/de not_active Ceased
- 1985-06-26 WO PCT/EP1985/000310 patent/WO1986000364A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8600364A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1986000364A1 (en) | 1986-01-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19860319 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH FR GB IT LI NL SE |
|
17Q | First examination report despatched |
Effective date: 19880225 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19900305 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: URBAN, UWE Inventor name: KAISER, CHRISTIAN Inventor name: HUESTER, BERNHARD |