EP0115747A1 - Elektronische Diebstahlsicherung mit einem elektronischen Schlüssel - Google Patents
Elektronische Diebstahlsicherung mit einem elektronischen Schlüssel Download PDFInfo
- Publication number
- EP0115747A1 EP0115747A1 EP83830002A EP83830002A EP0115747A1 EP 0115747 A1 EP0115747 A1 EP 0115747A1 EP 83830002 A EP83830002 A EP 83830002A EP 83830002 A EP83830002 A EP 83830002A EP 0115747 A1 EP0115747 A1 EP 0115747A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- inductance
- signal
- electronic key
- receiver part
- 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- Withdrawn
Links
Images
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
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- 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
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00777—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by induction
Definitions
- the subject of the present invention is an electronic anti-theft device comprising an electronic key which can be engaged with a fixed receiver part having the function of carrying out a process of identification of the electronic key engaged therewith and of providing an enabling signal to actuator means when the electronic key engaged with the receiver part has predetermined characteristics.
- Anti-theft devices of the said type generally include electronic keys in each of which there are incorporated electrical or electronic circuits, of the analogue or digital type, connected to electrical contacts fixed to the outer surface of the electronic key.
- the fixed receiver part is similarly provided with electrical contacts which are accessible from the outside and are intended to couple with the contacts of the key when the latter is inserted in the receiver part to achieve the electrical connection of the internal circuits of the key with the internal circuits of the receiver part.
- the internal circuit of the electronic key may also be constituted solely by one or more resistors having a calibrated resistance value or may include more complex circuits such as for example memory circuits, shift registers, etc.
- the devices of the types noted above have a problem due to the fact that their correct operation depends in a decisive manner on the state of the electrical contacts of the key and of the receiver part. In effect, even a single partially oxidised or dirty contact can cause lack of recognition of the correct electronic key.
- the problem displayed by the said electrical contacts has a further aspect.
- the receiver part of an anti-theft device is usually installed in a place accessible to the public, for example close to an access door to an environment of which it is desired to allow the.opening only to the possessors of a particular electronic key. This gives rise to a real danger from acts of vandals who might damage the electrical contacts of the receiver part, thus making the identification of the electronic keys subsequently coupled to this receiver part impossible.
- the object of the present invention is to provide an electronic anti-theft device of the electronic key type which does not have the disadvantages of the prior art devices and in which both the electronic key and the receiver part do not require electrical contacts which are accessible from outside for operation of the device.
- the present invention provides an electronic anti-theft device of the type specified above, the main characteristic of which lies in the fact that the receiver part comprises:
- the electronic anti-theft device includes an electronic key 1 which can be engaged with a receiver part 2 fixed, for example, to a wall 3 close to a door for access to an environment (not shown).
- the receiver part 2 includes an oscillator 4 connected to a resonant circuit of the LC-series type including a capacitor 5 and an inductance 6.
- 7 shows an amplitude demodulating circuit having its input connected to the common terminal of the inductance 6 and the capacitor 5.
- the output of the demodulating circuit 7 is connected to a comparator and recognition circuit 8 the output of which is connected to actuator means (not shown) constituted,for example,by devices for opening a lock or devices which control the operation of optical and/or acoustical type alarms.
- the electronic key 1 includes a second inductance 9 intended to be coupled magnetically to the inductance 6 of the receiver part 2 when the electronic key 1 is engaged with the receiver part.
- the receiver part 2 includes a support body 2a having afrontally open recess 2b for receiving a complementary shaped projection 1a which extends from an end face of the electronic key 1.
- Within the projection 1a of the electronic key 1 is located the winding of the inductance 9 which is also constituted by an annular coil.
- the projection 1a of the key engages the recess 2b of this receiver part and the inductance winding 9 is located concentrically within the inductance winding 6.
- the magnetic field generated by the current circulating in the inductance 6 is, in this situation, coupled to the inductance winding 9 of the electronic key 1.
- a transistor 10, of the NPN type has its emitter connected to one end of the inductance winding 9 and its collector connected to the other end of this winding through a resistor 11.
- This resistor has a rather low resistance value.
- the point of connection of the inductance winding 9 to the resistor 11 is connected to the anode of a rectifier diode 12, the cathode of which is connected to the input of a stabilized supply 13.
- a capacitor 14 is connected between the cathode of the diode 12 and earth.
- AA coded-binary signal generator circuit 15 has its output connecte o the base of the transistor 10 through a resistor 16 and an inverter 15a.
- the coded-signal generator circuit 15 is arranged to output an information signal of the type illustrated by way of example in Figure 3.
- This signal includes successive signal portions of equal duration T with each of which is associated an information bit.
- Each of these signal portions may assume a first or a second waveform according to whether the information bit associated therewith corresponds to a logic "0" or a logic "1".
- the waveform associated with "0" is preferably constituted by a pulse of duration T having a constant amplitude V 0 .
- the waveform associated with "1" is constituted by a pulse of duration ⁇ T, having a constant amplitude V o followed or preceded by an interval of duration T - ⁇ in which the signal has substantially zero anplitude.
- Figure 3 shows a portion of signal associated with the sequence "....010.".
- the waveform 3 associated with the "0" and the "1" may obviously be interchanged.
- the oscillator 4 is arranged,in a manner known per se to generate a signal having a predetermined frequency wnich is independent of the variations in the load impedance of the oscillator.
- the resonant frequency of the resonant circuit comprising the capacitor 5 and the inductance 6, under the conditions in which the electronic key is not engaged with the receiver part is the same as the frequency of the oscillator 4.
- This frequency may for example, be 100 KHz.
- the amplitude of the voltage across the inductance 6 remains constant. Consequently the output signal of the demodulator circuit 7 is a continuous signal, which,under these conditions, has a constant amplitude.
- This coded signal is passed through the inverter 15a to the transistor base 10. Consequently when the coded signal has an amplitude V 0 the transistor 10 is cut off. When the coded signal has a substantially zero amplitude the transistor 10 is saturated. At each change from the condition of saturation to the condition of cut-off of the transistor 10 there is a corresponding variation which can be sensed by the inductive component of the impedance of the resonant circuit in the receiver part 2. The resonant frequency of this circuit, and consequently the amplitude of the voltage across the inductance 6 varies correspondingly. In other words, the coded signal emitted by the generator circuit 15 acts as a signal modulating the amplitude of the voltage across the inductance 6.
- the amplitude demodulator 7 outputs a unidirectional signal the sequential progress of which follows the variations in the sequential progress of the modulating signal, that is, the signal putput of the generator circuit 15.
- the signal output of the demodulating circuit 7 is compared by the comparator and recognition circuit 8 with a predetermined reference sequence. When these coincide, the .electronic key 1 coupled to the receiver part 2 is "recognised” and the comparator and recognition circuit 8 outputs an enabling signal to actuator means of the type mentioned above, or prevents the actuation of alarm means. In the case of lack of recognition of the key, the comparator and recognition circuit 8 activates the alarm means or inhibits the actuation of the actuator means mentioned above.
- the inductance 9 When the signal output of the generator circuit 15 causes saturation of the transistor 10 the inductance 9 is substantially short-circuited. In this situation it is necessary that the short-circuiting of the inductance 9 does not last for an excessively long time, in order to avoid reduction of the supply of the coded-signal generator circuit 15.
- the coded signal ouput of the generator circuit 15 must not remain at the low level beyond a fraction of the duration T of an individual portion of the coded signal.
- the above-mentioned characteristic of the coded signal output of the generator circuit 15 lies in the fact that this coded signal has an average v lue which is not zero in any time interval of duration T, ensuring the continuity of the supply to the coded signal generator circuit 15 when the key 1 is inserted in the receiver part 2.
- the electronic key anti-theft device has the advantage of not requiring the use of fixed contacts for the key and the receiver part and thus is free of all the disadvantges which result from the presence of such contacts.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lock And Its Accessories (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83830002A EP0115747A1 (de) | 1983-01-11 | 1983-01-11 | Elektronische Diebstahlsicherung mit einem elektronischen Schlüssel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83830002A EP0115747A1 (de) | 1983-01-11 | 1983-01-11 | Elektronische Diebstahlsicherung mit einem elektronischen Schlüssel |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0115747A1 true EP0115747A1 (de) | 1984-08-15 |
Family
ID=8191588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83830002A Withdrawn EP0115747A1 (de) | 1983-01-11 | 1983-01-11 | Elektronische Diebstahlsicherung mit einem elektronischen Schlüssel |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0115747A1 (de) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2158870A (en) * | 1984-05-17 | 1985-11-20 | Waertsilae Oy Ab | Locking system |
GB2174452A (en) * | 1985-05-03 | 1986-11-05 | Ymos Ag | A locking device operating by mechanical and electrical means |
US4663952A (en) * | 1985-01-18 | 1987-05-12 | Egon Gelhard | Device for the contactless coupling of the control and output currents between the electronic elements on the locking cylinder and the electronic elements in the key of an electro/mechanical locking device |
FR2603933A1 (fr) * | 1986-09-17 | 1988-03-18 | Espinadel Gerard | Dispositif de commande par rapprochement notamment pour serrures electriques |
WO1988003594A1 (en) * | 1986-11-14 | 1988-05-19 | Nederlandse Organisatie Voor Toegepast-Natuurweten | Identification system |
FR2619410A2 (fr) * | 1986-09-17 | 1989-02-17 | Espinadel Gerard | Dispositif de commande par rapprochement notamment pour serrures electriques |
GB2209793A (en) * | 1985-11-21 | 1989-05-24 | Kokusan Kinzoku Kogyo Kk | Wireless signal controlled vehicle lock system |
EP0514772A1 (de) * | 1991-05-22 | 1992-11-25 | Kabushiki Kaisha TEC | Schlüssel |
EP0640734A1 (de) * | 1993-08-31 | 1995-03-01 | Siemens Aktiengesellschaft | System zur kontaktlosen Daten- bzw. Energieübertragung |
EP0659963A1 (de) * | 1993-12-20 | 1995-06-28 | Siemens Aktiengesellschaft | Elektronische Wegfahrsperre für ein Kraftfahrzeug |
FR2721882A1 (fr) * | 1994-07-04 | 1996-01-05 | Valeo Securite Habitacle | Dispositif de detection de presence de cle et systeme antivol utilisant un tel dispositif |
FR2731035A1 (fr) * | 1995-02-28 | 1996-08-30 | Ymos France | Ensemble constitue d'une serrure electrique de portiere avec fonction de secours electrique et de ses moyens de commande, et equipement comprenant plusieurs de ces ensembles |
EP0730071A1 (de) * | 1995-03-03 | 1996-09-04 | Siemens Aktiengesellschaft | Diebstahlschutzsystem für ein Kraftfahrzeug |
EP0767286A2 (de) * | 1995-10-02 | 1997-04-09 | Motorola, Inc. | Fernbedienbares schlüsselloses Eingangs- und Wegfahrsperresystem für Kraftfahrzeuge |
WO1997030255A1 (en) * | 1996-02-15 | 1997-08-21 | Toyota Jidosha Kabushiki Kaisha | Locking system for a vehicle |
DE19729402A1 (de) * | 1997-07-09 | 1999-02-11 | Siemens Ag | Diebstahlschutzsystem für ein Kraftfahrzeug |
DE19748329A1 (de) * | 1997-10-31 | 1999-05-06 | Siemens Ag | Vorrichtung und Verfahren zum Erkennen eines in ein Kraftfahrzeug-Schloß eingesteckten Schlüssels |
DE4341333B4 (de) * | 1993-12-03 | 2004-04-29 | Deltron Elektronische Systeme Gmbh | Verfahren zum Betreiben einer elektronischen Wegfahrsperre und elektronische Wegfahrsperre für Kraftfahrzeuge |
DE4434587B4 (de) * | 1993-10-01 | 2004-12-16 | Marquardt Gmbh | Elektronisches Zündstartschloßsystem an einem Kraftfahrzeug |
CN101189405B (zh) * | 2005-05-31 | 2012-02-01 | 三洋电机株式会社 | 电子式钥匙系统及使用其的二轮机动车 |
US8122746B2 (en) | 1995-09-29 | 2012-02-28 | Hyatt Jr Richard G | Electromechanical cylinder plug |
US8528373B2 (en) | 1997-06-06 | 2013-09-10 | Richard G. Hyatt, Jr. | Electronic cam assembly |
EP2266123B1 (de) | 2008-03-17 | 2018-10-10 | Powermat Technologies Ltd. | Induktives übertragungssystem |
US11387688B2 (en) | 2008-07-02 | 2022-07-12 | Powermat Technologies, Ltd. | System and method for coded communication signals regulating inductive power transmissions |
US11979201B2 (en) | 2008-07-02 | 2024-05-07 | Powermat Technologies Ltd. | System and method for coded communication signals regulating inductive power transmissions |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3979647A (en) * | 1975-06-11 | 1976-09-07 | The Eastern Company | Inductively coupled lock |
DE2634303A1 (de) * | 1976-07-30 | 1978-02-02 | Knorr Bremse Gmbh | Elektronische schliesseinrichtung |
GB1531951A (en) * | 1977-02-04 | 1978-11-15 | Eastern Co | Keyhole-less electronic lock |
-
1983
- 1983-01-11 EP EP83830002A patent/EP0115747A1/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3979647A (en) * | 1975-06-11 | 1976-09-07 | The Eastern Company | Inductively coupled lock |
DE2634303A1 (de) * | 1976-07-30 | 1978-02-02 | Knorr Bremse Gmbh | Elektronische schliesseinrichtung |
GB1531951A (en) * | 1977-02-04 | 1978-11-15 | Eastern Co | Keyhole-less electronic lock |
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2158870A (en) * | 1984-05-17 | 1985-11-20 | Waertsilae Oy Ab | Locking system |
US4663952A (en) * | 1985-01-18 | 1987-05-12 | Egon Gelhard | Device for the contactless coupling of the control and output currents between the electronic elements on the locking cylinder and the electronic elements in the key of an electro/mechanical locking device |
GB2174452A (en) * | 1985-05-03 | 1986-11-05 | Ymos Ag | A locking device operating by mechanical and electrical means |
GB2209793A (en) * | 1985-11-21 | 1989-05-24 | Kokusan Kinzoku Kogyo Kk | Wireless signal controlled vehicle lock system |
GB2209793B (en) * | 1985-11-21 | 1990-12-19 | Kokusan Kinzoku Kogyo Kk | Wireless signal controlled vehicle lock system |
FR2603933A1 (fr) * | 1986-09-17 | 1988-03-18 | Espinadel Gerard | Dispositif de commande par rapprochement notamment pour serrures electriques |
FR2619410A2 (fr) * | 1986-09-17 | 1989-02-17 | Espinadel Gerard | Dispositif de commande par rapprochement notamment pour serrures electriques |
WO1988003594A1 (en) * | 1986-11-14 | 1988-05-19 | Nederlandse Organisatie Voor Toegepast-Natuurweten | Identification system |
EP0514772A1 (de) * | 1991-05-22 | 1992-11-25 | Kabushiki Kaisha TEC | Schlüssel |
US5268560A (en) * | 1991-05-22 | 1993-12-07 | Tokyo Electric Co., Ltd. | Key device |
EP0640734A1 (de) * | 1993-08-31 | 1995-03-01 | Siemens Aktiengesellschaft | System zur kontaktlosen Daten- bzw. Energieübertragung |
DE4434587B4 (de) * | 1993-10-01 | 2004-12-16 | Marquardt Gmbh | Elektronisches Zündstartschloßsystem an einem Kraftfahrzeug |
DE4341333B4 (de) * | 1993-12-03 | 2004-04-29 | Deltron Elektronische Systeme Gmbh | Verfahren zum Betreiben einer elektronischen Wegfahrsperre und elektronische Wegfahrsperre für Kraftfahrzeuge |
EP0659963A1 (de) * | 1993-12-20 | 1995-06-28 | Siemens Aktiengesellschaft | Elektronische Wegfahrsperre für ein Kraftfahrzeug |
FR2721882A1 (fr) * | 1994-07-04 | 1996-01-05 | Valeo Securite Habitacle | Dispositif de detection de presence de cle et systeme antivol utilisant un tel dispositif |
EP0730072A1 (de) * | 1995-02-28 | 1996-09-04 | Ymos France | Anordnung bestehend aus einem elektrischen Türschloss mit einer elektrischen Notfunktion und aus seinen Steuerungsmitteln |
FR2731035A1 (fr) * | 1995-02-28 | 1996-08-30 | Ymos France | Ensemble constitue d'une serrure electrique de portiere avec fonction de secours electrique et de ses moyens de commande, et equipement comprenant plusieurs de ces ensembles |
EP0730071A1 (de) * | 1995-03-03 | 1996-09-04 | Siemens Aktiengesellschaft | Diebstahlschutzsystem für ein Kraftfahrzeug |
US5889471A (en) * | 1995-03-03 | 1999-03-30 | Siemens Aktiengesellschaft | Anti-theft system for a motor vehicle |
US8141399B2 (en) | 1995-09-29 | 2012-03-27 | Hyatt Jr Richard G | Electromechanical cylinder plug |
US8122746B2 (en) | 1995-09-29 | 2012-02-28 | Hyatt Jr Richard G | Electromechanical cylinder plug |
EP0767286A2 (de) * | 1995-10-02 | 1997-04-09 | Motorola, Inc. | Fernbedienbares schlüsselloses Eingangs- und Wegfahrsperresystem für Kraftfahrzeuge |
EP0767286A3 (de) * | 1995-10-02 | 1998-10-14 | Motorola, Inc. | Fernbedienbares schlüsselloses Eingangs- und Wegfahrsperresystem für Kraftfahrzeuge |
WO1997030255A1 (en) * | 1996-02-15 | 1997-08-21 | Toyota Jidosha Kabushiki Kaisha | Locking system for a vehicle |
US8528373B2 (en) | 1997-06-06 | 2013-09-10 | Richard G. Hyatt, Jr. | Electronic cam assembly |
DE19729402A1 (de) * | 1997-07-09 | 1999-02-11 | Siemens Ag | Diebstahlschutzsystem für ein Kraftfahrzeug |
DE19729402C2 (de) * | 1997-07-09 | 2003-07-03 | Siemens Ag | Diebstahlschutzsystem für ein Kraftfahrzeug |
US6351206B1 (en) | 1997-07-09 | 2002-02-26 | Siemens Aktiengesellschaft | Antitheft protection system for a motor vehicle |
US6396390B1 (en) | 1997-10-31 | 2002-05-28 | Siemens Aktiengesellschaft | Device for detecting a key inserted into a motor vehicle lock |
DE19748329C2 (de) * | 1997-10-31 | 1999-12-30 | Siemens Ag | Vorrichtung zum Erkennen eines in ein Kraftfahrzeug-Schloß eingesteckten Schlüssels |
FR2770563A1 (fr) | 1997-10-31 | 1999-05-07 | Siemens Ag | Dispositif de reconnaissance d'une cle engagee dans une serrure de vehicule automobile |
DE19748329A1 (de) * | 1997-10-31 | 1999-05-06 | Siemens Ag | Vorrichtung und Verfahren zum Erkennen eines in ein Kraftfahrzeug-Schloß eingesteckten Schlüssels |
CN101189405B (zh) * | 2005-05-31 | 2012-02-01 | 三洋电机株式会社 | 电子式钥匙系统及使用其的二轮机动车 |
EP2266123B1 (de) | 2008-03-17 | 2018-10-10 | Powermat Technologies Ltd. | Induktives übertragungssystem |
US11837399B2 (en) | 2008-03-17 | 2023-12-05 | Powermat Technologies, Ltd. | Transmission-guard system and method for an inductive power supply |
EP2266123B2 (de) † | 2008-03-17 | 2024-09-11 | Powermat Technologies Ltd. | Induktives übertragungssystem |
US11387688B2 (en) | 2008-07-02 | 2022-07-12 | Powermat Technologies, Ltd. | System and method for coded communication signals regulating inductive power transmissions |
US11979201B2 (en) | 2008-07-02 | 2024-05-07 | Powermat Technologies Ltd. | System and method for coded communication signals regulating inductive power transmissions |
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Legal Events
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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 |
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AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI NL SE |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SAET S.P.A. |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19850416 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CROSETTO, PIETRO |