EP0484880A2 - Système radio d'alarme - Google Patents

Système radio d'alarme Download PDF

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Publication number
EP0484880A2
EP0484880A2 EP91118836A EP91118836A EP0484880A2 EP 0484880 A2 EP0484880 A2 EP 0484880A2 EP 91118836 A EP91118836 A EP 91118836A EP 91118836 A EP91118836 A EP 91118836A EP 0484880 A2 EP0484880 A2 EP 0484880A2
Authority
EP
European Patent Office
Prior art keywords
unit
radio
alarm
receiver
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
EP91118836A
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German (de)
English (en)
Other versions
EP0484880A3 (en
EP0484880B1 (fr
Inventor
Norbert Schaaf
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.)
Diehl Stiftung and Co KG
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Individual
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Filing date
Publication date
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Application filed by Individual filed Critical Individual
Publication of EP0484880A2 publication Critical patent/EP0484880A2/fr
Publication of EP0484880A3 publication Critical patent/EP0484880A3/de
Application granted granted Critical
Publication of EP0484880B1 publication Critical patent/EP0484880B1/fr
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/16—Security signalling or alarm systems, e.g. redundant 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
    • G08B25/01—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
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/007—Wireless interrogation

Definitions

  • the invention relates to a radio alarm system according to the preamble of claim 1.
  • Class A only includes private houses that contain valuables up to DM 200,000.00
  • class B private houses with valuables over DM 200,000.00
  • medium-sized commercial objects such as supermarkets, schools, shops etc.
  • Class C includes jewelry stores, banks, etc.
  • class A one assumes occasional offenders, with class B from perpetrators who, with a certain planning, also scout out objects beforehand and ultimately with class C from perpetrators who, after weeks of observation, may come to grips with extensive measuring instruments and special tools.
  • the radio alarm center consists of the control unit 20a, a voltage supply device 20b, a radio receiver 20c and a radio transmitter 20d.
  • An infrared motion detector 21a is connected to a voltage supply device 21b and to a radio transmitter 21c.
  • the motion detector 21a issues a control command to the radio transmitter 21c.
  • the latter then sends a so-called data telegram to the radio receiver 20c.
  • the wireless alarm center handles the further processing.
  • an opening contact 22a for example on a door, which with a Power supply device 22b and a radio transmitter 22c is connected.
  • a bolt switch lock 23a is used, which is connected to a mechanical locking element 23e, a radio transmitter 23c, control electronics 23d and a voltage supply device 23b.
  • a radio pulse is emitted to the radio receiver 20c of the alarm center via the radio transmitter 23c, whereupon the system is activated.
  • a telephone dialing device 24a is provided, which is connected to a radio receiver 24c, a voltage supply device 24b (for example a power supply unit with a battery emergency power supply) and a radio transmitter 24d.
  • the control center controls the radio transmitter 20d, which emits a radio signal to the radio receiver 24c.
  • This radio receiver 24c controls the telephone dialer 24a via an output. The same applies to the radio transmitter 24d: this transmits a sabotage message to the radio receiver 20c of the alarm center.
  • an external siren 25a is provided, which is connected to control electronics 25d, a voltage supply device 25b, a radio receiver 25c and a radio transmitter 25e.
  • the external siren 25a receives a signal via the radio transmitter 20d and the receiver 25c.
  • the receiver 25c controls the external siren 25a via the control electronics 25d.
  • the radio transmitter 25e is used to transmit a sabotage message to the radio receiver 20c of the alarm center.
  • a detector 30 opens or closes its alarm contact and thus controls a switching logic 31.
  • a fixed coding which is set, for example, with dip switch switches or can also be hard-wired, is modulated together with the switching states in a modulation stage 34 and is transmitted via the transmitter 35 as already mentioned Data telegram sent.
  • This data telegram is received by the receiver 36 and demodulated in the demodulation stage 41.
  • the switching logic 42 controls e.g. outputs 38, 39 or 40.
  • 10 bits are used for transmitter identification (coding), so that 1024 codings are possible.
  • the invention has for its object to provide a radio alarm system which does not have the disadvantages of known systems described.
  • manipulation from the outside, in particular with identical transmitters, and intentional or unwanted blocking of a transmission from a radio transmitter to the alarm center or from the alarm center to an alarm device should not be possible, or should be possible only under very difficult circumstances.
  • all components (with the exception of the alarm center), in particular the signaling units, should be operated with a commercially available battery with transmitter and receiver.
  • the reporting units each emit at least two radio signals for the same message, which have a different carrier frequency and are encoded in data telegrams of fixed, predetermined coding, that a device is provided in the receiver unit of the central unit which detects the field strength of each received radio signal, the data telegrams are analyzed for the affiliation of the reporting units that they deliver to the system, in the event that an invalid data telegram is found, compares the value of the received field strength of the radio signal in question with a predetermined minimum value and, if this value is exceeded, by a predeterminable amount and after a certain period of time has elapsed, the is preferably about 10 seconds, triggers a warning display.
  • the background to this security measure is that the signal signals of the respective transmitter modules with the associated field strengths can be stored in the central unit, so that the at least valid field strengths that arrive are known.
  • the device in the central unit can therefore decide whether the incoming field strength with an invalid data telegram is strong enough to block a possibly valid message from the transmitter modules. If an invalid data telegram is received, the device decides whether the associated field strength exceeds the minimum value of a valid radio signal. If so, a warning is triggered.
  • the said device triggers each radio signal by the predeterminable amount of alarm upon detection of the invalidity of all received data telegrams and when the minimum values of the field strengths which are stored as described are exceeded. In this case, the entire radio system is inoperable.
  • a blocking of a transmission path from a detector with a transmitter unit, which emits at least two radio signals, to the central unit is thus avoided by using several transmitter-receiver pairs with different frequencies, so that even if a transmitter-receiver is interrupted or disturbed, Route the other transmitter-receiver routes remain in operation.
  • the likelihood of wanted or unwanted blocking of a transmission link decreases drastically with increasing number of transmitters and receiver modules used in the reporting unit or in the central unit.
  • reporting units each have at least two transmitters and two receivers and that after a reporting unit has sent its signals to the control center via the transmitters, the request comes from the control center to the reporting unit, this message to confirm again.
  • Security can be further increased here by coding the at least two radio transmitters that are assigned to each detector unit differently. This increases security with 10-bit coding of each transmitter by the exponent 10 for each additional transmitter.
  • Battery operation of the signaling units is achieved in that the entire circuits in the signaling unit as well as the receivers and the transmitters are only activated when an event occurs.
  • a signaling event occurs, the voltage supply for the circuit and the transmitters is switched on via a signaling relay located at the detector output.
  • the circuit associated with the receivers is switched on by means of at least one HF detector when an incoming input signal is received.
  • the at least one RF detector monitors the signal energy that is applied to the antenna. If the receivers and the downstream circuitry determine that this is a valid signal (as a rule, valid input signals are a request from the control center to carry out a status report or signal repetition), the transmitters are activated.
  • each of the HF detectors is advantageously preceded by a dynamization element, which only puts the circuit into operation or switches on the voltage supply in the case of newly arriving input signals.
  • the signaling units with double battery monitoring.
  • the alarm center can be constructed in such a way that a signal is set when the battery arrives for the first time, for example a light-emitting diode at the center or a display, so that the operator is informed in good time of the battery that will soon be exhausted.
  • the background to this measure is that in the event of a fault message - and this is the case in known systems with a single battery message - the operator may no longer be able to arm the system. In addition, it cannot be assumed that the operator has the right spare battery in stock.
  • the measure according to the invention of monitoring two threshold values ensures that there is a sufficient period of time after receipt of the notification of the battery falling below the first threshold, since the operator is able to sharply close the system until the message falls below the second threshold switch.
  • the circuits shown can be implemented in a radio alarm system with the units, as has already been explained with reference to FIG. 1.
  • FIG. 3 shows an example of the structure of a transmitter module of a detector 1, for example an infrared motion detector.
  • Control electronics 2 are arranged within a housing 27 which is advantageously made of metal and which is controlled by signals from detector 1 via lines 3. This information is forwarded by the control electronics 2 via a line 4 to a modulation stage 5, the coding of a hard-wired coding stage 6 being adopted by the modulation stage 5 and processed into a common data telegram and finally being forwarded to the transmitter unit 7.
  • a voltage supply 8 supplies all components of the module, the voltage of the voltage supply 8 being constantly checked by a voltage monitoring unit 9. The sending unit sends all information to the receiver level in the alarm center.
  • the receiver stage consists of a receiver unit 10 which sends the incoming radio signals to a Demodulation stage 11 passes on, from where the data telegrams in the evaluation stage 12 for data telegrams are checked for validity - or invalid - on the basis of the coding assigned to the respective detector 1 and in which the information content of the transmitted switching states is simultaneously forwarded to the interface 13.
  • the switching states contain information regarding the current state of each detector.
  • a central controller 14 takes the information present from the interface 13 and forwards it to a processing stage 15 or to the display 16.
  • the receiver unit 10, the demodulation stage 11 and the evaluation stage 12 for the data telegrams are preferably arranged in a metallic housing 17 in order to avoid electromagnetic interference.
  • FIG. 4 shows further details of the transmitting and receiving modules.
  • Each transmission unit 22 consists of several transmitters a to n, which emit signals with different carrier frequencies.
  • the transmitted signals are encoded.
  • the transmitters a to n receive the codes from a likewise n-stage modulation stage which is connected upstream of the transmitter unit 22.
  • the modulation stage 21 imprints codings on the signals, which it receives from the n-stage coding stage 20 connected upstream of it. Switching states are also added to the coding via a line 28.
  • the transmitter unit 22 thus sends n radio signals, each of which has a different frequency and is coded differently. According to a simplified embodiment, it is possible to give the same coding to all n radio signals.
  • An n-stage receiver stage 23 is provided on the receiver side, which receives the n radio signals of the transmitter unit 22.
  • Each receiver a to n is assigned to the modulator a to n in a demodulation stage 24.
  • the demodulated signals are fed via a line 29 in the present exemplary embodiment to the evaluation stage 12 for data telegrams as shown in FIG. 3.
  • the received signals are fed to an analog / digital converter 25.
  • the evaluation unit 26 checks whether the data telegrams associated with the individual radio signals a to n are valid or invalid, that is to say that is, whether they come from a unit belonging to the radio alarm system or not. If the check reveals that a data telegram is invalid, the field strength size is used to determine whether there is a radio interference.
  • the messages from the respective transmitters a to n with the associated field strengths are stored in the evaluation unit 26, so that the at least valid field strengths arriving are known.
  • the received field strength of a received radio signal with an invalid data telegram is strong enough to block a valid message from the transmitter. If such a field strength exceeds the stored value for field strengths of signals with a valid data telegram, this can be done in the display device are displayed.
  • the evaluation unit 26 is also designed so that it triggers an alarm when it is determined that all incoming data telegrams are invalid and all field strengths exceed the said minimum value for a predetermined period of time, since in this case the alarm system is inoperative.
  • Figure 5 shows an example of the structure of a detector unit 1, e.g. of a motion detector.
  • the entire detector unit is advantageously located in a metal housing 56, although the detector 73 can also be located outside of this housing.
  • the receiver unit 63 which consists of at least two receivers for different carrier frequencies, as well as the processor or the circuit electronics 61 and the transmitter unit 62, which consists of at least two transmitters with different carrier frequencies, are de-energized because the switching elements 53 and 54 supply the voltage interrupted by open switch.
  • the transmit / receive switch 65 is in the "receive" position.
  • the signal outputs C ', D' or E 'in the event of a reporting event or signal outputs A' or B 'in the event of a battery monitoring event become the processor 61 via lines 69 fed.
  • the processor 61 is connected to the supply voltage of the battery 50 via the signal outputs A to E. This causes the processor 61 to close the switching element 54 via the line 60 and thus also to supply the transmission unit 62 with voltage.
  • the information is prepared in accordance with radio technology to the Transmitter unit 62 passed on, whereby before the signal is passed on to the transmitters the processor 61 switches the transmit and receive switch 65 to "transmit" via a line 72, so that the transmit unit then leads via line 70 to the transceiver switch 65 and further to the antenna 55 can send their signals. Since the signal outputs from the detector or from the battery monitoring switch on the necessary voltage supply only very briefly, the processor has its own coupling 71 to the battery 50, which it maintains until the transmission unit has sent the data telegrams via the antenna 55. Only then is the power supply for the transmitter unit switched off via the line 60 and the switching element 54, then the transmitter and receiver switch 65 is switched back to "reception" via line 72.
  • the processor 61 now waits for a certain period of time for the request from the central unit to repeat and thus to confirm the previously emitted signal. If no request signal is received, the processor 61 causes the transmission unit 62 to transmit this signal until the request from the central unit is received. After receiving this signal, processor 61 switches itself off via voltage coupling 71. If a radio signal is received by the antenna, either transmitted by the alarm center or if there is a third-party carrier of the same frequency, a pulse is produced by the transmitting and receiving switch 65 from the applied signal in the dynamization element 75, which is generated by the RF detector 51 is evaluated in such a way that it closes the switching element 53 via line 80 and thus switches on the voltage supply for the receiver unit 63 and the processor 61.
  • the Receiver unit 63 feed the incoming data signal to the processor via line 82.
  • the processor 61 decides whether it is a valid data telegram or not. In the former case, the transmission unit 62 is activated via line 60, the transmission and reception switch 65 previously switched over to transmission mode via line 72 and then the transmission unit is instructed to send data telegrams prepared by the processor to the control center. In the second case, if it is an invalid data telegram, the processor is programmed so that it opens the switching element 53 or its switch via line 83 and thus switches off the power supply or the voltage supply for the receiver unit 63 and the processor 61.
  • the detector 73 emits an alarm signal to the processor via the information line 69, and if this information is forwarded via the processor 61 and the transmission unit 62 to the alarm center, and if the alarm center is in an armed state, the alarm center will prompt the notification unit 1 to to confirm the information given again.
  • the processor 61 is now requested via the receiving side to activate the transmitting unit 62 again for the same information delivery. Since with the renewed request on the part of the control center, this also sent the information about its armed state, the processor now knows that it must control the memory display 78 of the detector 73 via the line 77. At the same time, the signal is sent via the transmitting unit 62 to the receiving center, which then triggers an alarm.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
EP91118836A 1990-11-05 1991-11-05 Système radio d'alarme Expired - Lifetime EP0484880B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4035070A DE4035070A1 (de) 1990-11-05 1990-11-05 Funkalarmanlage
DE4035070 1990-11-05

Publications (3)

Publication Number Publication Date
EP0484880A2 true EP0484880A2 (fr) 1992-05-13
EP0484880A3 EP0484880A3 (en) 1993-08-11
EP0484880B1 EP0484880B1 (fr) 1997-02-26

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ID=6417632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118836A Expired - Lifetime EP0484880B1 (fr) 1990-11-05 1991-11-05 Système radio d'alarme

Country Status (3)

Country Link
EP (1) EP0484880B1 (fr)
AT (1) ATE149262T1 (fr)
DE (2) DE4035070A1 (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599192A1 (fr) * 1992-11-26 1994-06-01 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Procédé pour la surveillance et le fonctionnement d'une liaison radio entre capteurs et unité centrale d'un système d'alarme
EP0607562A1 (fr) * 1992-12-18 1994-07-27 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes
WO1994022118A1 (fr) * 1993-03-15 1994-09-29 Neighbourlink Limited Systemes de securite
FR2708774A1 (fr) * 1993-08-05 1995-02-10 Guillo Jean Dispositif de sécurité à liaison radio bi-directionnelle.
DE4425530A1 (de) * 1993-08-19 1995-02-23 Siemens Ag Sicherheitssystem, insbesondere für ein Kraftfahrzeug
DE4335815A1 (de) * 1993-10-20 1995-04-27 Hirschmann Richard Gmbh Co Funkalarmanlage
EP0670693A1 (fr) * 1992-11-09 1995-09-13 I Am Fine, Inc. Appareil et procede de surveillance a distance de parametres physiologiques
DE4408268A1 (de) * 1994-03-11 1995-09-21 Grundig Emv Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage
DE4417632A1 (de) * 1994-05-19 1995-11-23 Norbert Schaaf Verfahren zum Betreiben einer Funkalarmanlage
EP0729124A1 (fr) * 1995-02-23 1996-08-28 Peter John Goddard Système de signalisation de risques sans fils et procédé
EP0742539A1 (fr) * 1995-05-10 1996-11-13 Telenot Electronic Gmbh Système radio d'alarme
DE19539312A1 (de) * 1995-10-23 1997-04-24 Grundig Emv Verfahren zur Erhöhung der Übertragungssicherheit bei Funkalarmanlagen
EP0772172A1 (fr) * 1995-10-27 1997-05-07 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Dispositif d'alarme à sécurité de perturbation élevée
EP0814445A2 (fr) * 1996-05-20 1997-12-29 Pittway Corporation Système d'alarme automatique avec analyse d'un signal de surveillance
FR2787905A1 (fr) * 1998-12-23 2000-06-30 Cedi Securite Installation de communication asynchrone multifrequence
WO2002086837A1 (fr) * 2001-04-23 2002-10-31 Cardionet, Inc. Communication bidirectionnelle entre une unite de capteur et une unite de moniteur permettant de surveiller d'un patient
WO2005082687A1 (fr) 2004-03-01 2005-09-09 Toyota Jidosha Kabushiki Kaisha Système antivol et dispositif antivol pour les véhicules détectant les brouillages radio
EP1884905A1 (fr) * 2006-07-31 2008-02-06 Siemens Building Technologies Fire & Security Products GmbH & Co. oHG Gestion de canal pour un réseau de communication radio asynchrone
EP2416300A1 (fr) * 2009-04-02 2012-02-08 Hochiki Corporation N ud sans fil de prévention de sinistre, et système sans fil de prévention de sinistre
US9474445B2 (en) 2001-04-23 2016-10-25 Braemar Manufacturing, Llc Controlling access to medical monitoring system

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DE4242973C2 (de) * 1992-12-18 1995-01-05 Grundig Emv Funkalarmanlage mit einer Vielzahl von nach dem Code-Multiplexverfahren gebildeten Nachrichtenkanälen
DE4314282C1 (de) * 1993-04-30 1994-06-01 Grundig Emv Funkalarmanlage mit erhöhter Störsicherheit
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
DE4337211C1 (de) * 1993-10-30 1994-12-15 Grundig Emv Funkalarmanlage mit einer Funkstrecke zwischen den Außenstationen und der Zentraleinheit einer Alarmanlage
DE4337212A1 (de) * 1993-10-30 1995-05-04 Grundig Emv Funkalarmanlage mit einer Vielzahl von nach dem Frequenz-Hopping-Verfahren gebildeten Nachrichtenkanälen
DE4344172C2 (de) * 1993-12-23 2001-02-22 Grundig Ag Verfahren und Anordnung zur Synchronisierung der Außeneinheiten einer Funkalarmanlage mit der Zentraleinheit
DE19522113C1 (de) * 1995-06-19 1996-11-14 Klaus O K Dr Kamin Anlage zum Überwachen und Alarmieren bei Störungen innerhalb eines überwachten Bereichs
DE19531081C2 (de) * 1995-08-23 1999-07-15 Oliver Bartels Drahtlose Alarmanlage
DE19644565A1 (de) * 1996-10-26 1998-04-30 Teves Gmbh Alfred Sich bewegende Objekte, feststellende Überwachungseinrichtung, insbesondere für Kraftfahrzeuge
DE19757235C2 (de) * 1997-12-22 2000-01-05 Honeywell Ag Leitsystem für ein Gebäude bzw. für einen oder mehrere Räume eines Gebäudes
EP1018692B1 (fr) 1999-01-08 2006-06-28 Anatoli Stobbe Système de sécurité, transpondeur et dispositif de réception
US6694177B2 (en) 2001-04-23 2004-02-17 Cardionet, Inc. Control of data transmission between a remote monitoring unit and a central unit
US6664893B1 (en) 2001-04-23 2003-12-16 Cardionet, Inc. Method for controlling access to medical monitoring device service
US6665385B2 (en) 2001-04-23 2003-12-16 Cardionet, Inc. Medical monitoring system having multipath communications capability
DE102008031923A1 (de) * 2008-07-08 2010-01-14 Hochschule Ostwestfalen-Lippe Verfahren für die Überwachung eines Raums

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FR2502817A1 (fr) * 1981-03-27 1982-10-01 Mere Malleray Et Cie Dispositif de telecommande multi-porteuse
US4511887A (en) * 1981-09-14 1985-04-16 Radionics, Inc. Long range wireless alarm monitoring system
US4603325A (en) * 1984-06-05 1986-07-29 Pittway Corporation Evaluation apparatus

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0670693A1 (fr) * 1992-11-09 1995-09-13 I Am Fine, Inc. Appareil et procede de surveillance a distance de parametres physiologiques
EP0670693A4 (fr) * 1992-11-09 1996-03-06 I Am Fine Inc Appareil et procede de surveillance a distance de parametres physiologiques.
EP0599192A1 (fr) * 1992-11-26 1994-06-01 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Procédé pour la surveillance et le fonctionnement d'une liaison radio entre capteurs et unité centrale d'un système d'alarme
EP0607562A1 (fr) * 1992-12-18 1994-07-27 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Système radio d'alarme à transmission de messages de manière asynchrone aux canaux temporels à durée différente de périodes
WO1994022118A1 (fr) * 1993-03-15 1994-09-29 Neighbourlink Limited Systemes de securite
FR2708774A1 (fr) * 1993-08-05 1995-02-10 Guillo Jean Dispositif de sécurité à liaison radio bi-directionnelle.
DE4425530A1 (de) * 1993-08-19 1995-02-23 Siemens Ag Sicherheitssystem, insbesondere für ein Kraftfahrzeug
DE4335815A1 (de) * 1993-10-20 1995-04-27 Hirschmann Richard Gmbh Co Funkalarmanlage
DE4408268A1 (de) * 1994-03-11 1995-09-21 Grundig Emv Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage
DE4408268C2 (de) * 1994-03-11 2000-11-02 Grundig Ag Verfahren zur Erhöhung der Störsicherheit einer Funkalarmanlage
DE4417632A1 (de) * 1994-05-19 1995-11-23 Norbert Schaaf Verfahren zum Betreiben einer Funkalarmanlage
DE4417632C2 (de) * 1994-05-19 1998-10-22 Diehl Stiftung & Co Verfahren zum Betreiben einer Funkalarmanlage
EP0729124A1 (fr) * 1995-02-23 1996-08-28 Peter John Goddard Système de signalisation de risques sans fils et procédé
EP0742539A1 (fr) * 1995-05-10 1996-11-13 Telenot Electronic Gmbh Système radio d'alarme
DE19539312A1 (de) * 1995-10-23 1997-04-24 Grundig Emv Verfahren zur Erhöhung der Übertragungssicherheit bei Funkalarmanlagen
EP0770977A1 (fr) 1995-10-23 1997-05-02 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co. KG. Procédé pour l'augmentation de la sécurité de transmission d'un dispositif d'alarme radio
EP0772172A1 (fr) * 1995-10-27 1997-05-07 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig GmbH & Co. KG Dispositif d'alarme à sécurité de perturbation élevée
EP0814445A3 (fr) * 1996-05-20 1999-04-14 Pittway Corporation Système d'alarme automatique avec analyse d'un signal de surveillance
EP0814445A2 (fr) * 1996-05-20 1997-12-29 Pittway Corporation Système d'alarme automatique avec analyse d'un signal de surveillance
FR2787905A1 (fr) * 1998-12-23 2000-06-30 Cedi Securite Installation de communication asynchrone multifrequence
WO2002086837A1 (fr) * 2001-04-23 2002-10-31 Cardionet, Inc. Communication bidirectionnelle entre une unite de capteur et une unite de moniteur permettant de surveiller d'un patient
EP2355065A1 (fr) * 2001-04-23 2011-08-10 Cardionet, Inc. Communication bidirectionnelle entre une unité de capteur et une unité de surveillance pour la surveillance de patient
US9474445B2 (en) 2001-04-23 2016-10-25 Braemar Manufacturing, Llc Controlling access to medical monitoring system
WO2005082687A1 (fr) 2004-03-01 2005-09-09 Toyota Jidosha Kabushiki Kaisha Système antivol et dispositif antivol pour les véhicules détectant les brouillages radio
US7443286B2 (en) 2004-03-01 2008-10-28 Toyota Jidosha Kabushiki Kaisha Anti-theft system for vehicle and anti-theft device for vehicle
EP1884905A1 (fr) * 2006-07-31 2008-02-06 Siemens Building Technologies Fire & Security Products GmbH & Co. oHG Gestion de canal pour un réseau de communication radio asynchrone
WO2008015124A1 (fr) * 2006-07-31 2008-02-07 Siemens Building Technologies Fire & Security Products Gmbh & Co.Ohg Gestion de canal pour réseaux de radiocommunication asynchrones
EP2416300A1 (fr) * 2009-04-02 2012-02-08 Hochiki Corporation N ud sans fil de prévention de sinistre, et système sans fil de prévention de sinistre
EP2416300A4 (fr) * 2009-04-02 2013-07-17 Hochiki Co N ud sans fil de prévention de sinistre, et système sans fil de prévention de sinistre

Also Published As

Publication number Publication date
EP0484880A3 (en) 1993-08-11
ATE149262T1 (de) 1997-03-15
EP0484880B1 (fr) 1997-02-26
DE59108569D1 (de) 1997-04-03
DE4035070C2 (fr) 1993-04-15
DE4035070A1 (de) 1992-05-07

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