EP0081765A2 - Dispositif anti-vol pour véhicules automobiles - Google Patents

Dispositif anti-vol pour véhicules automobiles Download PDF

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Publication number
EP0081765A2
EP0081765A2 EP82111179A EP82111179A EP0081765A2 EP 0081765 A2 EP0081765 A2 EP 0081765A2 EP 82111179 A EP82111179 A EP 82111179A EP 82111179 A EP82111179 A EP 82111179A EP 0081765 A2 EP0081765 A2 EP 0081765A2
Authority
EP
European Patent Office
Prior art keywords
signal
transmitter
receiver
code
code signal
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.)
Granted
Application number
EP82111179A
Other languages
German (de)
English (en)
Other versions
EP0081765B1 (fr
EP0081765A3 (en
EP0081765B2 (fr
Inventor
Arnost Proske
Walter Weishaupt
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25797947&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0081765(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19813149259 external-priority patent/DE3149259A1/de
Priority claimed from DE19823240945 external-priority patent/DE3240945A1/de
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0081765A2 publication Critical patent/EP0081765A2/fr
Publication of EP0081765A3 publication Critical patent/EP0081765A3/de
Publication of EP0081765B1 publication Critical patent/EP0081765B1/fr
Application granted granted Critical
Publication of EP0081765B2 publication Critical patent/EP0081765B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • the invention relates to an anti-theft device for motor vehicles, with a first transmitter for wireless and contactless transmission of a code signal to a receiver arranged in or on the vehicle, which allows the motor vehicle to be used when the code signal matches a stored code signal, such as it is known from DE-OS 24 37 314.
  • the transmission can take place in an electromagnetic, acoustic or optical way.
  • a third way also known from DE-OS 29 26 304, is to reduce the spread of the transmitter. Since this reduction, owing to the physical properties of the transmitter, can never lead to an only punctiform transmission beam or there is always a certain spread, it is also possible to listen to the code signal here. On the other hand, even with a point-like transmission beam, the targeting of the receiver would be almost impossible and the use of the safety device would therefore be made considerably more difficult.
  • the invention has for its object to ensure effective protection of the security device from unauthorized persons in a simple manner.
  • the invention solves this problem by a second transmitter for a similar second signal, the orientation of which is chosen differently from that of the transmitter for the code signal so that when the code signal transmitter is aligned with the receiver, the second signal does not reach the receiver or is only weakened considerably.
  • the receiver only receives the code signal if it is aligned accordingly. in the area surrounding the motor vehicle, on the other hand, code and second signals are superimposed. If this signal resulting from the superimposition of the two signals is directed at the receiver by an unauthorized person, this signal is different from the code signal and the use of the motor vehicle is therefore not possible.
  • the second signal can be designed in various ways. It can be an interference signal. If, for example, the transmitted code consists of the sequence of identical transmission pulses with a variable sequence corresponding to the code with two defined intervals, the interference signal consists, for example, of a sequence of at least equally long pulses with the same interval. This distance is equal to the smaller of the two distances of the pulse train of the code signal.
  • the second signal can be another code signal which, when the transmitter for the (first) code signal is aligned with the associated (first) receiver, meets a second receiver in or on the motor vehicle.
  • the two code signals are superimposed outside the motor vehicle. The two signals can no longer be separated from one another, so that the unauthorized sensor of this superimposition of the two code signals cannot use the motor vehicle either.
  • the mode of operation of the second signal can be considerably improved by arranging the second transmitter in or on the motor vehicle.
  • the second transmitter Due to the rigid arrangement of the second transmitter, it is readily possible to have the latter transmit a second signal which does not reach the receiver, but otherwise reaches all locations outside the receiver. It is thus possible to cover the entire space outside the receiver with the second signal without gaps.
  • the second transmitter can be arranged at different locations in or on the motor vehicle.
  • the location of the receiver itself represents a particularly advantageous location. In this way, the condition of transmitting the second signal to all locations outside the receiver can be met in a particularly elegant manner.
  • the operating mode of the second transmitter can also be selected differently.
  • One of these options is to operate the second transmitter continuously. Against. it is much cheaper in terms of energy technology to activate the second transmitter with the first transmitter.
  • the second transmitter only works approximately when the first transmitter transmits its code signal. This offers the additional advantage that either the superimposition of code and second signal or only the second signal alone can be received at locations outside the receiver for a short time.
  • the second signal is difficult to analyze. This analysis can be further complicated by the fact that the second signal is modified each time it is transmitted compared to the last time.
  • the second transmitter can be activated in various ways by the first transmitter. It is thus possible for the first transmitter to send an activation signal before the actual code signal, after receiving which the second transmitter sends the second signal for a predetermined time within which the code signal occurs. An improved adaptation of the second to the code signal can be achieved in that the second transmitter is itself activated by the code signal emitted by the first transmitter. The second transmitter starts to work when the code signal arrives and ends when the code signal is also finished.
  • An anti-theft device for motor vehicles consists of a receiver 2 arranged in the motor vehicle 1, which is followed by a code comparator 3. This is connected to a memory 4 for a stored code signal and controls, for example, relay 6 for unlocking or locking the doors or flaps of the motor vehicle, not shown, with the aid of a schematically illustrated switch 5.
  • the user of the motor vehicle can transmit a code signal in the form of a radio, ultrasound or infrared signal with the aid of a mobile transmission device 7.
  • a transmitter 8 is used, which emits a sequence of similar pulses when a switch 9 is actuated.
  • the impulses are sent out at two different intervals according to the embossed code.
  • Such a pulse sequence is shown schematically and labeled I.
  • the transmitting device 7 also has a transmitter 10 with which a similar interference signal II is simultaneously emitted when the key switch 9 is actuated.
  • This interference signal consists of a sequence of pulses of the same length and strength as in the code signal I, the distance between which is chosen to be the smaller of the two distances for the pulses of the code signal I.
  • the code signal emitted by the transmitter 8 is superimposed with a second signal outside the motor vehicle in the device as shown schematically in FIG. 2.
  • the second signal is a second code signal to which a second receiver 2 'is assigned in addition to the receiver 2 for the first code signal from the transmitter 8 and a second code memory 4'.
  • the alignment of the two transmitters 8 and 10 is chosen so that their emitted code signals can be directed individually to the two receivers 2 and 2 'without interference. Outside the motor vehicle, however, the two code signals are superimposed or separated. It is therefore not possible to distinguish between the two code signals outside the motor vehicle, or the two signals cannot be recorded at the same place at the same time. The use of the motor vehicle is therefore also not possible for an unauthorized person.
  • this superimposition of the two code signals is shown schematically.
  • the two transmitters 8 and 10 emit code signals, for example, as shown in the diagram opposite and designated I and I '.
  • the superimposition of the code signals outside the motor vehicle is designated III.
  • the invention shows a surprisingly simple way, the intercepted signal to render it worthless by distinguishing it from the code signal or signals received in the motor vehicle.
  • a transmitter 10 ' is located approximately at the location of the receiver 2, with which a similar interference signal is emitted simultaneously with the code signal.
  • This interference signal consists of a sequence of pulses of the same length and strength as in the code signal, the distance between which is chosen to be the smaller of the two distances for the pulses of the code signal.
  • the transmitter 10 ' is activated by the code signal of the transmitter 8 that occurs.
  • a signal generator 11 is connected to the receiver 2, which is activated by the code signal occurring and operates the transmitter 10 'until the end of the code signal.
  • the position of the transmitter 10 'relative to the receiver 2 and its transmission range is selected so that the interference signal emitted by the transmitter 10' cannot get into the receiver 2, but otherwise at any point outside of the receiver 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
EP19820111179 1981-12-11 1982-12-02 Dispositif anti-vol pour véhicules automobiles Expired - Lifetime EP0081765B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3149259 1981-12-11
DE19813149259 DE3149259A1 (de) 1981-12-11 1981-12-11 Diebstahl-sicherungsvorrichtung fuer kraftfahrzeuge
DE3240945 1982-11-05
DE19823240945 DE3240945A1 (de) 1982-11-05 1982-11-05 Diebstahl-sicherungsvorrichtung fuer kraftfahrzeuge

Publications (4)

Publication Number Publication Date
EP0081765A2 true EP0081765A2 (fr) 1983-06-22
EP0081765A3 EP0081765A3 (en) 1984-02-08
EP0081765B1 EP0081765B1 (fr) 1986-04-02
EP0081765B2 EP0081765B2 (fr) 1991-07-03

Family

ID=25797947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820111179 Expired - Lifetime EP0081765B2 (fr) 1981-12-11 1982-12-02 Dispositif anti-vol pour véhicules automobiles

Country Status (1)

Country Link
EP (1) EP0081765B2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9312460U1 (de) * 1993-08-19 1994-12-15 Siemens AG, 80333 München Elektronische Anordnung zur Überwachung eines Zustandes eines oder mehrerer Gegenstände, z.B. einer Sache und/oder Person
DE4340260A1 (de) * 1993-10-01 1995-04-06 Marquardt Gmbh Schließsystem, insbesondre für Kraftfahrzeuge
US5841363A (en) * 1993-10-01 1998-11-24 Marquardt Gmbh Locking system especially for automobiles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1267955C (fr) * 1985-08-09 1990-04-17 Dispositif d'acces sans clef pour vehicule
SE448803B (sv) * 1986-05-22 1987-03-16 Ljungmans Ind Ab Sett att forhindra obehorig atkomst av information
US4845505A (en) * 1987-02-13 1989-07-04 Toyota Jidosha Kabushiki Kaisha Automobile antenna system for diversity reception

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2437314A1 (de) * 1974-08-02 1976-02-12 Thomas Schubert Lichtelektronischer schalter fuer eine alarmanlage in kraftfahrzeugen
FR2420008A1 (fr) * 1978-03-17 1979-10-12 Neiman Sa Dispositif de commande d'une serrure de vehicule automobile
DE2911828A1 (de) * 1979-03-26 1980-10-16 Vdo Schindling Verfahren zur drahtlos fernbedienbaren tuerverriegelung, insbesondere einer zentralverriegelung von kraftfahrzeugen und einrichtung zur durchfuehrung des verfahrens
DE2926304A1 (de) * 1979-06-29 1981-01-29 Daimler Benz Ag Vorrichtung zum verhindern unbefugten oeffnens und unbefugter benutzung eines fahrzeugs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9312460U1 (de) * 1993-08-19 1994-12-15 Siemens AG, 80333 München Elektronische Anordnung zur Überwachung eines Zustandes eines oder mehrerer Gegenstände, z.B. einer Sache und/oder Person
DE4340260A1 (de) * 1993-10-01 1995-04-06 Marquardt Gmbh Schließsystem, insbesondre für Kraftfahrzeuge
US5841363A (en) * 1993-10-01 1998-11-24 Marquardt Gmbh Locking system especially for automobiles

Also Published As

Publication number Publication date
EP0081765B1 (fr) 1986-04-02
EP0081765A3 (en) 1984-02-08
EP0081765B2 (fr) 1991-07-03

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