EP0316853A1 - Système sans fil pour signaler des dangers - Google Patents

Système sans fil pour signaler des dangers Download PDF

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Publication number
EP0316853A1
EP0316853A1 EP88118986A EP88118986A EP0316853A1 EP 0316853 A1 EP0316853 A1 EP 0316853A1 EP 88118986 A EP88118986 A EP 88118986A EP 88118986 A EP88118986 A EP 88118986A EP 0316853 A1 EP0316853 A1 EP 0316853A1
Authority
EP
European Patent Office
Prior art keywords
infra
room
control center
infrared
pulse
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
EP88118986A
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German (de)
English (en)
Other versions
EP0316853B1 (fr
Inventor
Friedrich Dr.-Ing. Schumacher
Walter Dipl.-Ing. Freter (Fh)
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT88118986T priority Critical patent/ATE102727T1/de
Publication of EP0316853A1 publication Critical patent/EP0316853A1/fr
Application granted granted Critical
Publication of EP0316853B1 publication Critical patent/EP0316853B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
    • G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
    • 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
    • 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
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults

Definitions

  • the invention relates to a wireless hazard detection system, consisting of at least one room control center, a building control center, which is connected to the room control center via existing power lines, and several infrared transmission devices arranged in a respective room, each of which is connected to at least one hazard detector and which an IR transmission device in the room control center.
  • a device for hazard reporting with individual detectors and a signaling center in one room is already known from European laid-open specification 0 125 387. There, the signal transmission between the individual detectors and the signaling center takes place alternately with the aid of infrared radiation transmission.
  • the individual detectors are periodically requested by the signal center with an interrogation signal to transmit. The individual detectors respond after different time delays characteristic of the individual hazard detectors, from which the detector in question, ie its address, can be determined.
  • Such a device for hazard reporting has also been proposed in order to reduce or avoid the not inconsiderable installation outlay, in particular when a hazard alarm system has to be installed subsequently.
  • the individual detectors are therefore battery-powered and should therefore have low energy consumption.
  • the individual detectors are also disadvantageously equipped with an infrared receiver and are therefore constantly switched on and ready to receive, and nevertheless cause considerable energy consumption in this way.
  • the object of the present invention is therefore to avoid the disadvantages listed above and to enable interference-free and sabotage-proof signal transmission with the lowest possible energy consumption of the individual hazard detectors and transmitting devices for a wireless hazard detection system as described at the beginning.
  • the individual detectors and transmitters should be constantly monitored for their functionality.
  • the infrared transmission devices for one or more detectors have only one infrared transmitter, which sends data to the room control center with a relatively low expenditure of energy.
  • the emitting diodes of the individual infrared transmitters which are provided with simple optics, require a low transmission energy due to the orientation towards the room center.
  • the received data from the individual infrared transmitters are processed and processed in the room control center using a microprocessor system and transmitted via a network transmission device via the existing line network to a common building control center, which evaluates the corresponding messages and issues an alarm message in the event of a dangerous state.
  • the hazard detection system according to the invention can have an all-round infrared receiving device in the central room.
  • this has the advantage that a single infrared receiving device must be provided, which is non-directional and therefore has no special optics, but which on the other hand has a decoding device in order to determine the individually coded signals of the individual transmitters according to their origin.
  • the room control center has a plurality of infrared receivers, each of which is associated with an optical receiving system with a very extreme beam bundling.
  • This beam bundling can be less than two degrees, for example.
  • Each of these infrared receiving devices with the optics is aligned with a corresponding infrared transmitter.
  • this has the advantage that all infrared transmitters can be of identical design and therefore do not require individual coding.
  • This has the additional advantage that, due to the exact alignment, a very low transmission energy is sufficient to receive a sufficiently strong transmission signal with a large signal-to-noise ratio.
  • this arrangement has the decisive advantage that, with the extremely narrow beam bundling and exact alignment, it is extremely difficult to deceive or disrupt the infrared receivers of the room control center with extraneous light or specifically during sabotage treatment.
  • the infrared transmitters regularly emit pulse telegrams with different pulse intervals, at least four different message states being able to be transmitted.
  • the respective state is determined from the different pulse intervals by real-time measurement.
  • an evaluation program can be provided in the microprocessor system of the room control center, which program determines the corresponding state from the pulse intervals determined. If, for example, no pulses are received, the transmission is disturbed. If impulses are received at a certain predetermined distance, the transmission is OK and an idle state can be signaled continuously. If the impulses are transmitted with a different pulse interval, the transmission is also OK and the status is interpreted in response to a danger message. If a lot of impulses occur, a foreign transmitter interference is recognized.
  • double pulses can be generated, both the spacing of the pulses between a double pulse and the different spacing of the pulse pairs being able to be used for the various status information. This further increases the security of transmission and the number of message states.
  • An expedient embodiment of the invention for reducing the power consumption of the individual transmitters consists in that, in the alarm state, a series of alarm pulses with a smaller pulse interval compared to the Ruheim pulses is emitted immediately and then automatically switched over to a power-saving continuous alarm pulse transmission, the pulse interval for the permanent alarm transmission in the area of the pulse interval for the Ruheim pulses, for example a slightly larger pulse interval.
  • This is particularly advantageous for intrusion detectors because certain areas, e.g. during the day, the formwork is defocused at the headquarters. Alarm messages that are triggered by the contacts of such monitoring devices lead to a status message and transmission for alarm, but are not forwarded as an official alarm in the control center for the duration of the disarming.
  • an alarm state is continuously transmitted from the relevant infrared transmitter via the associated room control center to the building control center, but is not reported there as an alarm because of the disarming. Since there is no information transfer from the room control center to the infrared transmitter for reasons of energy saving, the automatic switchover to the permanent alarm according to the invention ensures that the hazard detector in question is monitored in a manner similar to the transmission of the idle state if no alarm is given, but the functionality of the hazard detector, the infrared transmitter, is Transmission route and the room control center is continuously checked.
  • the pulser IC can be controlled in each infrared transmitter in such a way that a high pulse sequence with, for example, 20 to 50 ms pulse spacing is emitted.
  • this state can be output as analog DC voltage via a digital-analog converter and thus the tone frequency of a loudspeaker can be modulated so that the respective optics can be aligned quickly and precisely on the basis of the pitch.
  • the room control center can advantageously be battery-backed, so that monitoring of dangerous states is ensured at all times even in the event of a power failure.
  • the building control center is equipped with a mains-independent power supply anyway, if necessary.
  • a wireless hazard detection system with directional infrared transmission is shown schematically.
  • the building control center can be a conventional danger control center which, as only indicated here, indicates faults ST and alarm AL, but which has a suitable network transmission for data exchange.
  • a network transmission NUB is shown in block diagram form in the room control center RZ1. It is controlled by the MPS microprocessor system.
  • Infrared receivers IRE1 to IRE8 are connected to the microprocessor system MPS.
  • the infrared receivers are each connected to an infrared transmitter IRS1 to IRS8, which is arranged in the same room, for example in the area of a window, via an infrared transmission link.
  • IRS1 to IRS8 which is arranged in the same room, for example in the area of a window, via an infrared transmission link.
  • the reception optics of the room control center are aligned with the transmission optics of the infrared transmitter.
  • FIG. 1 only two further infrared transmitters IRS2 and IRS3 are indicated.
  • two danger detectors GM and a door contact TK are connected to the infrared transmitter IRS2.
  • a motion detector BM is connected to the third infrared transmitter IRS3 as a hazard detector GM.
  • the infrared transmitter IRS1 has, for example, two hazard detectors, a window contact FK and a glass break detector GBM.
  • a battery-powered (BAT) pulse generator IC (PIC) which is explained in more detail in principle with reference to FIG. 3, feeds an LED transmitter, which can have, for example, two transmitter diodes SD, which are not shown here.
  • the wireless hazard detection system allows the various intrusion signal sources within a room to be wirelessly connected to the room control center.
  • not only eight but also sixteen infrared transmitters can be connected to a room control center. All infrared transmitters transmit the status information that is present at their hazard detectors, for example alarm contacts, to the room control center, which receives these signals from the individual infrared transmitters.
  • Each infrared transmitter has a battery-operated, free-running, quartz-controlled transmitter that emits periodic patterns of pulses.
  • the individual pulse can be formed by a very short, for example 1.5 ⁇ s long, but have a high pulse current, for example up to 2 amps.
  • the infrared transmitter can, for example, regularly send an impulse described above at intervals of 250 ms.
  • This pulse sequence is received in the room control center and interpreted as the detector's idle state, so that a wire connection is present in accordance with a quiescent current monitoring.
  • the pulses received in the room control center RZ via the individual infrared receivers IRE1 to IRE8 are processed by means of an MPS microprocessor system.
  • a computational evaluation is provided.
  • the real-time measurement of the pulse intervals is carried out, for example, using a 24-bit synchronous counter, which is counted up by a 2 MHz quartz oscillator.
  • the connected computer ie the MPS microprocessor system, reads the data from the buffer memory and uses an evaluation program to find the respective status information of the infrared transmitters or the danger detectors connected to them from the pulse intervals determined. At least four status information are provided for each transmission channel: No pulses means that the transmission is disturbed (STu). Pulses with a defined interval for rest (RUP), for example 10 seconds, means that the transmission is OK and the connected hazard detectors are at rest.
  • URP defined interval for rest
  • impulses arrive at a much shorter pulse interval (ALP), for example at a interval of 250 ms, this means that the transmission is OK, but a hazard detector has responded and an alarm message is therefore available.
  • ALP pulse interval
  • STf third-party transmitter
  • the pulse generator IC PIC is formed by a synchronization and changeover logic SUL, a changeover switch UMS, several dividers (EIT, TL, VOT) and a pseudo random generator ZGE.
  • the synchronization and switchover logic SUL has, for example, four GMEG hazard detection inputs: A glass break detector input GBM with an associated reset input RGBM and three contact inputs, for example window contacts FK.
  • the synchronization and switchover logic SUL has a set input SEE for setting up the optics and for setting the pseudo additional sequence. To set up the optics, a very high pulse sequence ARP is generated via this set input SEE.
  • the pulse is generated, for example, with a simple clock quartz UQ and a downstream prescaler VOT, which, for example, divides the vibrations of 32 kHz down to a ratio of 32: 1, so that a 1 ms cycle arises, which on the one hand is based on an adjustable divider EIT and on the other hand on the random number generator CGU arrives.
  • the random generator ZGE can be controlled via a reset input R by the synchronization and switching logic component SUL.
  • the clock pulses generated are, on the one hand, via the adjustable divider EIT, which is also controlled by the synchronizing and switching logic SUL, and via a further divider TL and one from the synchronizing and switching logic controlled switching device UNS via a pulse driver PTR.
  • the Ruheim pulses RUP which are emitted at a pulse interval of, for example, 10 seconds, are obtained from the pulses, which are divided down again via the divider TL, and reach the transmitter diode SD via the changeover switch UMS on the normally closed contact RU.
  • the pulses present at the output of the adjustable divider EIT which for example have a spacing of 250 ms, are given to the transmitter diode SD via the switch contact AL of the switch UMS.
  • the pseudo pulses PS which can have a pulse interval of approximately 70 seconds, pass from the random generator ZGE via the changeover contact SS to the transmitter diode SD.
  • the basic circuit diagram illustrates the mode of operation of the hazard detection system according to the invention, the necessary switching elements in the pulse generator IC PIC being implemented in the infrared transmitter IRS.
  • FIG. 3 shows time diagrams of the infrared transmission pulses. Three different pulse telegrams are shown in the first diagram and the pulse sequence in the event of an alarm in the pulse telegram shown below.
  • a high pulse sequence ARP with, for example, a pulse interval of 20 ms is generated, which is controlled for the alignment via the set input (SEE to SUL) in the infrared transmitter.
  • Ruheim pulses RUP with a pulse interval of 10 sec. Are regularly transmitted from the infrared transmitters to the room control center, for example.
  • pseudo pulses PS are also initiated via the set input (SEE) in the synchronization and switchover logic (SUL) according to FIG. 2, which may have a pulse interval of approximately 70 seconds, for example.
  • SEE set input
  • SUL synchronization and switchover logic
  • an alarm pulse delivery ALP is generated immediately, which has a pulse interval of, for example, 250 ms. Has. This pulse is emitted, for example, sixteen times, then - as already explained above - an alarm message is automatically switched over to save electricity in such a way that the alarm pulse is given as a permanent alarm DALP with a substantially larger pulse interval, which may be, for example, close to the usual home pulse intervals.
  • a pulse interval of 9 seconds is provided here, for example.
  • a larger pulse interval can also be selected, for example 12 seconds, which is then greater than the interval for Ruheim pulses.
  • an average power consumption of less than 3 ⁇ A is achieved, so that a capacity for five years can be guaranteed with the long-term batteries provided there. Therefore, such a battery capacity design is certainly sufficient for such hazard detection systems, so that additional monitoring of the capacity of the battery is not necessary.
  • One too early decrease in battery capacity would in any case be reported as a fault if the specified pulse sequences no longer arrive at the room control center in time and can be interpreted accordingly by the evaluation there.
EP88118986A 1987-11-17 1988-11-14 Système sans fil pour signaler des dangers Expired - Lifetime EP0316853B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88118986T ATE102727T1 (de) 1987-11-17 1988-11-14 Kabelloses gefahrenmeldesystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3739042 1987-11-17
DE3739042 1987-11-17

Publications (2)

Publication Number Publication Date
EP0316853A1 true EP0316853A1 (fr) 1989-05-24
EP0316853B1 EP0316853B1 (fr) 1994-03-09

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EP88118986A Expired - Lifetime EP0316853B1 (fr) 1987-11-17 1988-11-14 Système sans fil pour signaler des dangers

Country Status (3)

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EP (1) EP0316853B1 (fr)
AT (1) ATE102727T1 (fr)
DE (1) DE3888291D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477411A1 (fr) * 1990-09-27 1992-04-01 Siemens Aktiengesellschaft Système de télécommande pour espaces étendues
DE4242973A1 (de) * 1992-12-18 1994-06-23 Grundig Emv Funkalarmanlage mit einer Vielzahl von nach dem Code-Multiplexverfahren gebildeter Nachrichtenkanäle
DE4243026A1 (de) * 1992-12-18 1994-06-23 Grundig Emv Funkalarmanlage mit asynchroner Übermittlung von Meldungen über Zeitkanäle unterschiedlicher Periodendauern
DE4307244A1 (de) * 1993-03-08 1994-09-15 Siemens Ag Gefahrenmeldesystem
EP0911775A2 (fr) * 1997-09-30 1999-04-28 Siemens Aktiengesellschaft Procédé de transmission radio dans un système de signalisation d'alarmes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006021597A1 (de) * 2006-05-09 2007-11-22 Siemens Ag Vorrichtung und System zum Erkennen einer Beeinträchtigung eines Netzelementes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125387A1 (fr) * 1983-04-29 1984-11-21 Cerberus Ag Méthode et dispositif de signalisation de risque
EP0197815A1 (fr) * 1985-03-15 1986-10-15 Societe Electronique De La Region Pays De Loire Procédé pour assurer la surveillance de personnes et/ou de biens et système pour la mise en oeuvre de ce procédé
FR2588682A1 (fr) * 1985-10-16 1987-04-17 Gurba Jean Luc Dispositif d'alarme comprenant au moins un capteur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0125387A1 (fr) * 1983-04-29 1984-11-21 Cerberus Ag Méthode et dispositif de signalisation de risque
EP0197815A1 (fr) * 1985-03-15 1986-10-15 Societe Electronique De La Region Pays De Loire Procédé pour assurer la surveillance de personnes et/ou de biens et système pour la mise en oeuvre de ce procédé
FR2588682A1 (fr) * 1985-10-16 1987-04-17 Gurba Jean Luc Dispositif d'alarme comprenant au moins un capteur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PROC. CARNAHAM CONFERENCE ON CRIME COUNTERMEASURES, Lexington, 6.-8. April 1977, Seiten 45-50; R. PERRAU et al.: "Technology developments for low-cost residential alarm systems" *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477411A1 (fr) * 1990-09-27 1992-04-01 Siemens Aktiengesellschaft Système de télécommande pour espaces étendues
DE4242973A1 (de) * 1992-12-18 1994-06-23 Grundig Emv Funkalarmanlage mit einer Vielzahl von nach dem Code-Multiplexverfahren gebildeter Nachrichtenkanäle
DE4243026A1 (de) * 1992-12-18 1994-06-23 Grundig Emv Funkalarmanlage mit asynchroner Übermittlung von Meldungen über Zeitkanäle unterschiedlicher Periodendauern
DE4307244A1 (de) * 1993-03-08 1994-09-15 Siemens Ag Gefahrenmeldesystem
EP0911775A2 (fr) * 1997-09-30 1999-04-28 Siemens Aktiengesellschaft Procédé de transmission radio dans un système de signalisation d'alarmes
EP0911775A3 (fr) * 1997-09-30 2000-12-27 Siemens Aktiengesellschaft Procédé de transmission radio dans un système de signalisation d'alarmes

Also Published As

Publication number Publication date
DE3888291D1 (de) 1994-04-14
EP0316853B1 (fr) 1994-03-09
ATE102727T1 (de) 1994-03-15

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