EP0219060B1 - Dispositif de sécurité pour véhicule à moteur - Google Patents

Dispositif de sécurité pour véhicule à moteur Download PDF

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Publication number
EP0219060B1
EP0219060B1 EP19860113981 EP86113981A EP0219060B1 EP 0219060 B1 EP0219060 B1 EP 0219060B1 EP 19860113981 EP19860113981 EP 19860113981 EP 86113981 A EP86113981 A EP 86113981A EP 0219060 B1 EP0219060 B1 EP 0219060B1
Authority
EP
European Patent Office
Prior art keywords
code signal
code
signal
transmitter
signals
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.)
Expired - Lifetime
Application number
EP19860113981
Other languages
German (de)
English (en)
Other versions
EP0219060A2 (fr
EP0219060A3 (en
Inventor
Walter Weishaupt
Arnost Proske
Michael Tigges
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0219060A2 publication Critical patent/EP0219060A2/fr
Publication of EP0219060A3 publication Critical patent/EP0219060A3/de
Application granted granted Critical
Publication of EP0219060B1 publication Critical patent/EP0219060B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional 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
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G07C2009/00238—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed
    • G07C2009/00253—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks the transmittted data signal containing a code which is changed dynamically, e.g. variable code - rolling code
    • 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
    • G07C2009/00785—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 light
    • 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
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/06—Involving synchronization or resynchronization between transmitter and receiver; reordering of codes

Definitions

  • the invention relates to a security device for a motor vehicle, in particular for access control or as theft protection, with a portable transmitter for an arbitrarily emitted code signal which is changed when it is emitted compared to the previous code signal and with a receiver arranged on the motor vehicle for the actually emitted and the expected one Code signal emits a switching signal.
  • the code signal which is emitted and which is essentially the basis of the comparison is determined after a previously matched first emitted code signal with a stored code signal as a second code signal with the aid of a random generator. This generates a question code, which is transmitted to the key and which prompts the latter to issue an answer code that essentially determines the second code signal.
  • the comparison device now compares this response code with the response code expected on the basis of the question code and, if the two response codes match, emits a switching signal, for example for unlocking a door lock.
  • a disadvantage of the known security device is primarily the three-time transmission of a code signal, namely the previously sent code signal, the question code and the answer code, which leads to transmission errors, particularly in motor vehicles due to the high susceptibility to faults. As a result, the rightful user of the motor vehicle is prevented from using it.
  • the transmitter since the transmitter must be designed as a transponder. He must be able to receive the question code signal sent by the motor vehicle. The same applies to the receiver arranged on the motor vehicle, which must also be able to serve as a transmitter for the question code.
  • the invention is based on the object of creating a safety device of the type mentioned at the outset which offers the greatest possible degree of safety with regard to the function with little design effort.
  • the invention solves this problem in that the emitted code signal is reproducibly variable in accordance with an individual law of education, that the comparison device compares this code signal with a number of code signals which follow the expected code signal based on the law of education that if the emitted does not match Code signal with one of the code signals from the number of code signals, the comparison device compares a further code signal which is arbitrarily emitted by the transmitter with the code signal which follows the code signal first transmitted on the basis of the Education Act.
  • the reproducible change in the code signal in the transmitter is fundamental to the invention.
  • a "catch area" with the first number of code signals is available in the receiver, which is relatively large.
  • the reason for this is that it is possible to change the code signal of the transmitter arbitrarily, for example with the aid of a pushbutton arranged there, even when the transmitter is not used to trigger the switching signal of the safety device.
  • the code signal of the transmitter directed at the receiver does not lead to a positive result when the received code signal is compared with the first number of code signals used for comparison Recipient.
  • a single code signal can be used for a second comparison, which results from the first received code signal based on the Education Act. Unauthorized users, unless they are in possession of the Education Act, cannot generate the code signal expected by the recipient. The second comparison also does not lead to the triggering of the switching signal.
  • An advantageous improvement of the invention consists in comparing the second code signal of the transmitter with a second number of code signals of the receiver for the second comparison. This number should be significantly smaller than the number of code signals for the first comparison.
  • the decisive factor here is the consideration that the "catch area", i.e. the number of code signals used for the second comparison can be kept relatively small for the authorized vehicle user, since he sends the second code signal relatively quickly after the first code signal has been ineffectively transmitted.
  • the receiver On the basis of the law of formation of the code signals which is identical in the transmitter and receiver, the receiver "knows" which code signal is transmitted by the transmitter as a second code signal on the basis of the code signal received first.
  • a warning or alarm signal can then be generated which indicates an obviously abusive attempt to operate the safety device.
  • a corresponding interlock can be used to make a new comparison between a transmitted code signal and a code signal from the determined number of code signals for a predetermined time prevented.
  • a renewed comparison between a transmitted code signal and the number of code signals can be carried out, if necessary after a specified blocking time has elapsed, on the basis of the code signal originally expected by the comparison device.
  • the authorized user of the motor vehicle can actuate the security device when the code signal is first sent.
  • a schematically shown motor vehicle 1 has a receiver 2 for a code signal, which is supplied by a portable transmitter 3.
  • the code signal is transmitted, for example, on an infrared or radio frequency basis.
  • a comparator 4 is connected to the receiver 2, which in turn is connected to a code signal memory 5 or alternatively to a code signal computer.
  • the comparator 4 controls, for example, a locking device 6, not shown in detail, of a lock, also not shown, and additionally, if necessary, a generally acoustic warning display.
  • the code signals supplied by the transmitter 3 and contained in the memory 5 are subject to the same individual education law, for example with regard to the pulse / pause ratio. Each code signal is in a defined relationship with the preceding and the following one. This can be given, for example, by a consecutive number.
  • the code signal received at the receiver 2 is identical to the code signal which is contained in the memory 5 and which is expected for this transmission / reception process.
  • the comparator 4 determines the agreement of the two code signals and outputs a corresponding switching signal to the unlocking device 6.
  • the code signal is changed using the specified education law.
  • the code signal of the transmitter 3 is changed by correspondingly actuating the switch 7 a number of times and that the code signals respectively sent do not reach the receiver 2. In this case, asynchrony occurs between transmitter 3 and receiver 2.
  • the comparator 4 also delivers a corresponding switching signal for the unlocking device 6 in this case, a number (1) of code signals is present in the memory 5 for each code signal actually expected, which code signals follow the expected code signal and which are determined by the Education Act.
  • the number of these code signals is predetermined and is, for example, 20.
  • the comparator 4 compares the received code signal with one of the stored ones 20 code signals and delivers a corresponding switching signal to the unlocking device 6.
  • the comparator 4 determines the mismatch between the code signal then transmitted by the transmitter 3 and received with the receiver 2 and the stored 20 code signals and delivers the switching signal to the unlocking device 6 not.
  • a second code signal sent out by the transmitter 3 within a relatively short period of time and modified in accordance with the law on education compared to the first code signal sent is compared in the comparator 4 with a code signal that is contained in the memory 5 in a number (11) of code signals.
  • This second number of code signals is significantly smaller than the first number (1) of code signals taken into account for the first comparison.
  • the code signals of the second number result on the basis of the first code signal of the transmitter 3 recorded with the receiver on the basis of the still valid education law.
  • This second number is, for example, equal to 3.
  • the checking of the second code signal of the transmitter 3 with the code signals of the second number of the memory 5 is made possible with the aid of a timing element 8 which is switched on in the connection between the memory 5 and the comparator 4.
  • the timing element 8 is activated by the comparator 4 when the first comparison is carried out.
  • code signal memory 5 it is also possible to use a code signal calculator which generates the first and second number of code signals taken into account for the comparison on the basis of the code code which was decisive last or the first code signal emitted.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)

Claims (5)

  1. Dispositif de sécurité pour un véhicule à moteur, en particulier pour contrôle d'accès ou protection contre le vol, avec un émetteur portatif pour un signal codé à délivrer volontairement, signal modifié lors de la délivrance par rapport au signal codé précédent et avec un récepteur disposé sur le véhicule à moteur pour le signal codé, auquel est associé un dispositif de comparaison pour le signal codé effectivement émis et le signal codé attendu et qui délivre un signal de commutation quand il y a coïncidence des deux signaux codés, dispositif de sécurité caractérisé en ce que le signal codé émis est variable d'une manière pouvant être reproduite en fonction d'une formule individuelle, de telle sorte que ce signal codé puisse être comparé dans le dispositif de comparaison (4) avec une série (1) de signaux codés, qui se joignent, sur la base de la formule au signal codé attendu et en ce que en cas de non coïncidence du signal codé émis et de l'un des signaux codés provenant de la série de signaux codés, un autre signal codé, délivré volontairement par l'émetteur (3) peut être comparé avec le signal codé dans le dispositif de comparaison (4), signal qui se joint au signal codé émis d'abord sur la base de la formule.
  2. Dispositif de sécurité selon la revendication 1, caractérisé en ce que dans le dispositif de comparaison l'autre signal codé délivré volontairement par l'émetteur peut être comparé avec une deuxième série (II) de signaux codés sensiblement plus petite par rapport à la première série, signaux qui se raccordent au signal codé d'abord émis sur la base de la formule.
  3. Dispositif de sécurité selon l'une des revendications 1 ou 2, caractérisé en ce qu'un dispositif d'alerte (9) en cas de défaut de coïncidence entre les signaux codés lors de la première et de la deuxième comparaison, délivre un signal d'alarme ou d'alerte.
  4. Dispositif de sécurité selon l'une des revendications 1 à 3, caractérisé en ce qu un système temporisé (8) active le dispositif de comparaison (4) après réception du premier signal codé de l'émetteur (3) pendant seulement un court instant après cette réception et bloque pour une période de temps suivante plus longue.
  5. Dispositif de sécurité selon l'une des revendications 1 à 4, caractérisé en ce que dans le dispositif de comparaison (4) le signal codé attendu initialement demeure comme point de départ en cas de défaut de coïncidence entre les signaux codés lors de la première et de la deuxième comparaison.
EP19860113981 1985-10-11 1986-10-09 Dispositif de sécurité pour véhicule à moteur Expired - Lifetime EP0219060B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853536378 DE3536378A1 (de) 1985-10-11 1985-10-11 Sicherheitseinrichtung fuer ein kraftfahrzeug
DE3536378 1985-10-11

Publications (3)

Publication Number Publication Date
EP0219060A2 EP0219060A2 (fr) 1987-04-22
EP0219060A3 EP0219060A3 (en) 1988-08-24
EP0219060B1 true EP0219060B1 (fr) 1992-06-03

Family

ID=6283404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860113981 Expired - Lifetime EP0219060B1 (fr) 1985-10-11 1986-10-09 Dispositif de sécurité pour véhicule à moteur

Country Status (2)

Country Link
EP (1) EP0219060B1 (fr)
DE (2) DE3536378A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2026498T3 (es) * 1986-08-12 1992-05-01 Siemens Aktiengesellschaft Instalacion electronica de cierre con al menos una cerradura especialmente para automoviles.
DE3636822C2 (de) * 1986-10-29 1993-12-23 Ruf Kg Wilhelm Elektronische Fernbetätigungseinrichtung, insbesondere für Zentralverriegelungsanlagen von Kraftfahrzeugen
GB8813730D0 (en) * 1988-06-10 1988-07-13 Omni Services Ltd Time defence system
IT1249853B (it) * 1991-10-18 1995-03-28 Trw Sipea Spa Telecomando per mezzi attuatori, in particolare di un autoveicolo.
DE4302550C2 (de) * 1993-01-29 1997-02-20 Siemens Ag Fahrzeug-Schließsystem
DE4308899C1 (de) * 1993-03-19 1994-02-03 Siemens Ag Verfahren zum Betrieb eines in einem Dialogverfahren fernsteuerbaren Schließsystemes, z.B. eines Kfz
BE1008699A3 (fr) * 1994-09-09 1996-07-02 Banksys Procede et agencement pour donner selectivement un acces dans un systeme de securite.
DE4440349A1 (de) * 1994-11-11 1996-05-15 Bayerische Motoren Werke Ag Verfahren zum Synchronisieren zweier dialogfähiger Sender-Empfängereinheiten für ein Codesignal in einer Kraftfahrzeug-Schließanlage
DE9419635U1 (de) * 1994-12-09 1995-03-02 Engel, Gerhard, Dipl.-Ing., 41564 Kaarst Sicherungseinrichtung insbesondere für Kraftfahrzeuge
US5774858A (en) * 1995-10-23 1998-06-30 Taubkin; Vladimir L. Speech analysis method of protecting a vehicle from unauthorized accessing and controlling
FR2745135B1 (fr) 1996-02-15 1998-09-18 Cedric Colnot Procede pour faire autoriser par un serveur l'acces a un service a partir de dispositifs portatifs a microcircuits electroniques du type carte a memoire par exemple
US6617961B1 (en) 1999-11-15 2003-09-09 Strattec Security Corporation Security system for a vehicle and method of operating same

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1101513A (fr) * 1976-11-08 1981-05-19 Leonard J. Genest Systeme de securite
DE2824421C2 (de) * 1978-06-03 1985-10-10 Robert Bosch Gmbh, 7000 Stuttgart Schaltanordnung zum Betreiben von Schließeinrichtungen und ähnlichen Sicherheitseinrichtungen, insbesondere als Diebstahlschutz an einem Kraftfahrzeug
DE2911160A1 (de) * 1979-03-22 1980-10-02 Daimler Benz Ag Vorrichtung zum verhindern unbefugter inbetriebsetzung von fahrzeugen
DE2926304A1 (de) * 1979-06-29 1981-01-29 Daimler Benz Ag Vorrichtung zum verhindern unbefugten oeffnens und unbefugter benutzung eines fahrzeugs
DE2952151C2 (de) * 1979-12-22 1982-02-18 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zur elektronischen Ver- oder Entriegelung von Sicherheitseinrichtungen, insbesondere als Diebstahlsschutz in einem Kraftfahrzeug
EP0068437B2 (fr) * 1981-06-24 1989-10-25 Nissan Motor Co., Ltd. Système d'entrée sans clef pour véhicule automoteur
DE3225754A1 (de) * 1982-07-09 1984-01-12 Hülsbeck & Fürst GmbH & Co KG, 5620 Velbert Verfahren zur schliesswirksamen wechselwirkung eines schluesselartigen teils mit einem schlossartigen teil
DE3244049C2 (de) * 1982-11-27 1986-06-26 Kiekert GmbH & Co KG, 5628 Heiligenhaus Zentralverriegelungsanlage für ein Kraftfahrzeug
DE3300170C2 (de) * 1983-01-05 1986-12-18 DATA-LÖSCH Gesellschaft für Sicherheitstechniken im Datenschutz mbH, 4420 Coesfeld Sperrwerk-Steuerungsanlage
DE3300732A1 (de) * 1983-01-12 1984-09-20 Kiekert GmbH & Co KG, 5628 Heiligenhaus Zentralverriegelungsanlage fuer ein kraftfahrzeug
DE3313098C1 (de) * 1983-04-12 1984-10-11 Daimler-Benz Ag, 7000 Stuttgart Elektronisches Schloßsystem
DE3320721A1 (de) * 1983-06-08 1984-12-13 Siemens AG, 1000 Berlin und 8000 München Verfahren zur code-sicherung bei einem elektronischen schluessel
JPS6065875A (ja) * 1983-09-19 1985-04-15 日産自動車株式会社 車両用施錠制御装置
FR2556115B1 (fr) * 1983-12-02 1987-05-07 Lewiner Jacques Perfectionnements aux dispositifs de commande a code

Also Published As

Publication number Publication date
EP0219060A2 (fr) 1987-04-22
EP0219060A3 (en) 1988-08-24
DE3536378A1 (de) 1987-04-16
DE3685541D1 (de) 1992-07-09

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