EP0361288A2 - Dispositif de sécurité - Google Patents

Dispositif de sécurité Download PDF

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Publication number
EP0361288A2
EP0361288A2 EP89117339A EP89117339A EP0361288A2 EP 0361288 A2 EP0361288 A2 EP 0361288A2 EP 89117339 A EP89117339 A EP 89117339A EP 89117339 A EP89117339 A EP 89117339A EP 0361288 A2 EP0361288 A2 EP 0361288A2
Authority
EP
European Patent Office
Prior art keywords
code signal
transmitter
signal
password
alarm
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Withdrawn
Application number
EP89117339A
Other languages
German (de)
English (en)
Other versions
EP0361288A3 (fr
Inventor
Hans-Werner Weber
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.)
Telefunken Electronic GmbH
Original Assignee
Telefunken Electronic GmbH
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 Telefunken Electronic GmbH filed Critical Telefunken Electronic GmbH
Publication of EP0361288A2 publication Critical patent/EP0361288A2/fr
Publication of EP0361288A3 publication Critical patent/EP0361288A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/008—Alarm setting and unsetting, i.e. arming or disarming of the security system

Definitions

  • the invention relates to a safety device according to the preamble of the first claim.
  • a security device of this type has already been proposed, in which a transmitter is provided for emitting a high-frequency signal which is modulated with a code signal word, that is to say a pulse sequence of a specific frequency or a specific pulse duration pattern.
  • the security device also includes an adapted receiver, which is designed for receiving and demodulating or decoding the signal words emitted by the transmitter. If a defined information content of the coded RF signal is available, an alarm transmitter assigned to the receiver is triggered.
  • the invention has for its object to develop a security device according to the preamble of the first claim so that an unauthorized use of the transmitter difficult and its scope is expanded.
  • a transmitter When a transmitter is constructed in accordance with the invention, it is only possible to emit a radio-frequency signal modulated with a code signal word when an entered password has a stored password matches.
  • Each password is assigned a pair of code signal words that can be called up in a code signal generator.
  • the corresponding code signal word is then generated by selective activation of the code signal generator and at the same time the generation of the high-frequency signal is released, to which the code signal word generated in each case is modulated.
  • the pair of code signal words contains information for an alarm signal and information for a reset signal.
  • Demodulation means or decoding means are accordingly provided in the adapted receiver, which decrypt the code signal words and either activate an assigned alarm device or deactivate the alarm device again by switching off via the reset signal.
  • the user of the transmitter identified as authorized by the password is thus able to activate a receiver, for example attached to a product or person, ie to activate its alarm device or to deactivate it afterwards.
  • a timer is provided in the switching device assigned to the transmitter. Each time the device is switched on, one of the code signal words is started again and the transmitter is ready to transmit for a defined period of time. After this time has elapsed, the supply circuit is switched off and can only be returned to the state in which the modulated high-frequency signal can be emitted by entering the password. This also ensures that the transmitter is automatically switched to the unusable state when the authorized user has moved away from the transmitter or there is no need to use the transmitter.
  • the stored password can also preferably be changed and a pair of code signal words is assigned to each of these passwords. This makes it possible to use a transmitter for different receivers that are set up for different code signal words.
  • a multi-position switch is preferably provided on the transmitter, via which the multi-digit password can be entered one after the other, one position of the password determining the pair of code signal words.
  • Separate button switches for an alarm signal and for a reset signal for calling up the code signal word are preferably assigned to the transmitter.
  • the switching device provided in the transmitter has a microprocessor which uses control paths to query the switching position of the key switches and via which the associated code signal word is then generated in the code signal generator depending on the key switch actuated.
  • a safety device consists of a transmitter 1, which in the present case is realized by the components arranged within a dash-dotted line, and an adapted receiver 2.
  • the high-frequency transmitter part of the transmitter 1 comprises a high-frequency oscillator 3, to which a bandpass filter 4 that is matched to the oscillation frequency of the oscillator is connected downstream.
  • the oscillator signal thus freed in particular from harmonic and subharmonic or other interference frequencies then becomes fed to a high-frequency amplifier 5, the power-amplified output signal is fed to a low-pass filter, the cut-off frequency of which is matched to the basic oscillator frequency. Harmonics are isolated in the low-pass filter, which can arise due to non-linearities in the amplifier 5.
  • the power-amplified high-frequency signal is applied to a modulator 7, which contains pin diodes as modulation elements and which thereby permits very high degrees of modulation, which can range up to 100%.
  • the modulator 7 is additionally supplied with a code signal word via a special line 8, which is modulated onto the high-frequency signal in the modulator 7.
  • the high-frequency signal thus modulated with information content then arrives at a transmitting antenna 10 via a further low-pass filter 9.
  • the cut-off frequency of the second low-pass filter 9 is also matched to the basic oscillator frequency in conjunction with the modulated code signal word and attenuates frequencies above the useful signal to a considerable extent.
  • the actual transmitter constructed in this way has a very high spurious rejection, so that, in accordance with the relevant regulations, no inadmissible interference radiation is emitted via the antenna 10.
  • the modulator 7 offers an optimal adaptation to the low-pass filters 6, 9 at high degrees of modulation.
  • the modulation signal fed into the modulator 7 via the line 8 is a code signal word which is generated in a code signal generator 11. It preferably consists of a predetermined sequence of pulses of a certain frequency, but the pulses can also have different widths or amplitudes.
  • the code signal generator 11 is part of a microprocessor 12 which is programmed to control the periphery of the transmitter.
  • the transmitter is used to reach certain receivers 2, which are set up to demodulate the code word sent in each case.
  • An acoustic or optical alarm transmitter 13 is assigned to the receiver for identification purposes, so that an adapted receiver 2 entering the transmission range of the transmitter 1 activates its alarm transmitter via a decoder when the transmitter emits the associated alarm signal. If, on the other hand, transmitter 1 sends a reset signal, then after corresponding demodulation or decoding in the decoder, the alarm device 13 in the addressed receiver 2 is deactivated.
  • the transmitter is assigned an activation switching unit 14, which identifies a manually operated key switch 15 for triggering an alarm signal and a manually operated key switch 16 for triggering a reset signal.
  • a control signal is emitted to the code signal generator 11, which then generates a code signal word which activates the alarm transmitter 13 in the receiver 2.
  • the reset button switch 16 is pressed, then the code signal generator 11 is controlled in such a way that it generates a reset signal which is intended for resetting or switching off the alarm transmitter in the receiver 2.
  • a supply circuit 17 is also switched through by the activation unit 14, so that the oscillator 3 and the amplifier 5 are activated.
  • the generated by it Power high-frequency signal is then modulated with the code signal word selected in each case via the key switches 15, 16 and transmitted via the transmission antenna 10.
  • a memory for a password is assigned to the microprocessor 12.
  • the pair of code signal words which are stored in the memory 18 and to which the receiver 2 is tuned are determined via switch paths which can be optionally connected and which are queried via the microprocessor when the comparison value is input.
  • the password also serves to release the readiness for transmission of the actual transmitter train 3 to 10, in which this password defined in the memory 18 is compared in the microprocessor 12 with a password which can be generated via a manually operated input device 19 and via a password line 20 Microprocessor 12 is supplied.
  • the input device 19 comprises a multi-digit switch 21 via which the user has to enter a predetermined password and which is to be switched to the password line 20 via an acknowledgment key 22.
  • the resulting numerical code representing the password 20 also sets the code word generator 11 ready for work via a standby line 23. Only then can the code word generator 11 be put into the transmit state by actuating the key switches 15 or 16 queried by the microprocessor 12 while simultaneously connecting the oscillator 3 and the amplifier 5 to the associated supply voltage.
  • the transmitter 1 can then only be put on standby by entering the password again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Transmitters (AREA)
  • Lock And Its Accessories (AREA)
  • Circuits Of Receivers In General (AREA)
EP19890117339 1988-09-27 1989-09-20 Dispositif de sécurité Withdrawn EP0361288A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832667 1988-09-27
DE3832667A DE3832667A1 (de) 1988-09-27 1988-09-27 Sicherungseinrichtung

Publications (2)

Publication Number Publication Date
EP0361288A2 true EP0361288A2 (fr) 1990-04-04
EP0361288A3 EP0361288A3 (fr) 1991-05-02

Family

ID=6363739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890117339 Withdrawn EP0361288A3 (fr) 1988-09-27 1989-09-20 Dispositif de sécurité

Country Status (4)

Country Link
US (1) US5077831A (fr)
EP (1) EP0361288A3 (fr)
JP (1) JPH02121096A (fr)
DE (1) DE3832667A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5263181A (en) * 1990-10-18 1993-11-16 Motorola, Inc. Remote transmitter for triggering a voice-operated radio
US5252960A (en) * 1991-08-26 1993-10-12 Stanley Home Automation Secure keyless entry system for automatic garage door operator
WO1996036131A1 (fr) * 1995-05-12 1996-11-14 Telefonaktiebolaget Lm Ericsson (Publ) Reduction de signaux parasites dans des circuits integres d'emetteurs hf
US5758268A (en) * 1995-11-07 1998-05-26 Sony Corporation Transmitter
US6349201B1 (en) * 1998-02-25 2002-02-19 Sean Ford Bullet-proof vest with distress signaling system
US6031465A (en) 1998-04-16 2000-02-29 Burgess; James P. Keyless entry system for vehicles in particular
US7106171B1 (en) 1998-04-16 2006-09-12 Burgess James P Keyless command system for vehicles and other applications
US20050242923A1 (en) * 1998-04-16 2005-11-03 David Pearson Passive entry systems for vehicles and other applications
EP1001664A1 (fr) * 1998-11-13 2000-05-17 Balteau X-Ray S.A. Procédé de commande d'un générateur de rayons ionisants et installation pour la mise en oeuvre de ce procédé
DE10032916A1 (de) * 2000-07-06 2002-01-24 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Absperrung eines Parkraums für ein Fahrzeug
US7015791B2 (en) * 2003-08-19 2006-03-21 General Motors Corporation Keyless entry module and method
JP2007117227A (ja) * 2005-10-26 2007-05-17 Quick Art:Kk 風船及びその製造方法
US8712648B2 (en) 2011-03-08 2014-04-29 Gm Global Technology Operations Passive charge cord release system for an electric vehicle
US8690591B2 (en) 2011-06-09 2014-04-08 GM Global Technology Operations LLC Electric vehicle with secondary charge cord release mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503428A1 (fr) * 1981-04-03 1982-10-08 Hamon Nicolas Systeme d'alarme a distance
GB2135487A (en) * 1983-02-16 1984-08-30 Veltronic Spa Remote signalling apparatus

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648187A1 (de) * 1976-10-25 1978-04-27 Wolfgang Dipl Ing Luecker Drahtloser melder und alarmmelder
US4247850A (en) * 1977-08-05 1981-01-27 Prince Corporation Visor and garage door operator assembly
DE2828755A1 (de) * 1978-06-30 1980-01-03 Bosch Gmbh Robert Funknetz
DE3006128A1 (de) * 1980-02-19 1981-08-20 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Schliesseinrichtung
US4412211A (en) * 1981-08-28 1983-10-25 American District Telegraph Co. System for test sequence annunciation
US4463340A (en) * 1981-09-18 1984-07-31 Darrell E. Issa Anti-theft control system
DE3213271A1 (de) * 1981-10-22 1983-05-05 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Verfahren zur herstellung von solarabsorberschichten fuer hohe temperaturen
DE3213272C1 (de) * 1982-04-08 1983-10-13 Siemens AG, 1000 Berlin und 8000 München Verfahren zum Erhöhen der Störsicherheit bei der drahtlosen Übertragung von Informationen
US4529980A (en) * 1982-09-23 1985-07-16 Chamberlain Manufacturing Corporation Transmitter and receiver for controlling the coding in a transmitter and receiver
DE3516613A1 (de) * 1985-05-06 1986-11-06 Lutz Dipl.-Ing. 1000 Berlin Pawlik Elektronische passwortkarte zur automatischen erzeugung wechselnder zeichenfolgen fuer die anmeldung von edv-benutzern zur berechtigungspruefung in edv-systemen
US4786900A (en) * 1985-09-30 1988-11-22 Casio Computer Co. Ltd. Electronic key apparatus
DE3642951A1 (de) * 1986-02-06 1987-08-20 Notifier Co Detektorsystem, insbesondere sicherungssystem, und verfahren zur erzeugung einer anzeige eines zustandes an mindestens einer entfernten stelle
DE3741324A1 (de) * 1987-12-05 1989-06-15 Alltronik Gmbh Handsender zur aussendung codierter elektromagnetischer impulse und darauf abgestimmter empfaenger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503428A1 (fr) * 1981-04-03 1982-10-08 Hamon Nicolas Systeme d'alarme a distance
GB2135487A (en) * 1983-02-16 1984-08-30 Veltronic Spa Remote signalling apparatus

Also Published As

Publication number Publication date
JPH02121096A (ja) 1990-05-08
EP0361288A3 (fr) 1991-05-02
DE3832667C2 (fr) 1991-04-11
DE3832667A1 (de) 1990-04-05
US5077831A (en) 1991-12-31

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