EP0338274A1 - Data transmission system for a wireless danger signal arrangement - Google Patents

Data transmission system for a wireless danger signal arrangement Download PDF

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Publication number
EP0338274A1
EP0338274A1 EP89105072A EP89105072A EP0338274A1 EP 0338274 A1 EP0338274 A1 EP 0338274A1 EP 89105072 A EP89105072 A EP 89105072A EP 89105072 A EP89105072 A EP 89105072A EP 0338274 A1 EP0338274 A1 EP 0338274A1
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Prior art keywords
data
transmission
frequency
phase
transmission system
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EP89105072A
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German (de)
French (fr)
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EP0338274B1 (en
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Klaus Dr.-Ing. Von Pieverling
Gerhard Dipl.-Ing. Ritter
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Siemens AG
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Siemens AG
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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
    • G08B25/06—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 power transmission lines

Definitions

  • the invention relates to a data transmission system for a wireless hazard detection system with a plurality of room control centers, each with associated hazard detection devices and a building alarm center, which are connected to one another via existing light mains cables.
  • a high level of interference immunity and sabotage security is required for the signal transmission of binary hazard detection data from the sensors or hazard detectors to the alarm center.
  • the data is transmitted between the room control center and the building control center via an existing lighting network. This places high demands on such a data transmission system with regard to a safe and reliable transmission of the hazard reporting data.
  • a carrier-frequency transmission system with phase modulation is formed by using the microprocessor system already present in the respective control centers for the processing of the binary hazard reporting data by means of additionally provided network transmission devices, that the adjustable carrier frequency is derived from the microprocessor quartz that the transmission in time-division multiplex operation takes place in selectively selectable frequency channels, and that the signal evaluation is carried out in the respective microprocessor system.
  • No separate microprocessor is required for the network transmission device for the data transmission system according to the invention, because the microprocessor already present in the room control centers and the building alarm center for the actual data transmission, i.e. Sending and receiving via the light network is used.
  • the signals are evaluated in the existing microprocessor.
  • the microprocessor quartz which is also present, is used as a further advantage for the derivation of the adjustable carrier frequency. This has the advantage of a very high frequency constancy of the carrier frequency and a very narrow bandwidth for the transmit and receive data, so that an optimal signal-to-noise ratio is achieved. This enables an optimal reduction of broadband interference and suppression of line interference, such as those caused by multiples of the line frequency of television sets.
  • the GM hazard detectors are connected via the associated infrared transmitter IRSn to the room control center RZi, which has correspondingly assigned infrared receivers IRIn.
  • This infrared transmission device within a room to be monitored is described in the above-mentioned German patent application P 37 39 042.
  • the data received in the room control center RZi and processed and processed with the microprocessor system MP there are transmitted via a network transmission device NUE to the building control center GZ via the existing light line network NL.
  • a network transmission device NUE In addition to a microprocessor system MP and other devices for alarm processing, alarm output AL and fault display ST, which are not shown here, this also has a network transmission device NUE.
  • the data transmission takes place by means of the network transmission device NUE, with the use of the microprocessor system MP of the respective center.
  • the network transmission device NUE provided for this purpose is shown with the existing microprocessor system MP and the coupling NKE to the light line network NL in FIG. 2 in the block diagram.
  • the network transmission device NUE has, inter alia, a frequency synthesizer FS which is supplied with a frequency divider FT by the microprocessor system MP and which controls the phase modulator PM with the selected carrier frequency PF, for example 100 kHz, and two phase detectors PT1 and PT2 via a phase splitter PSP.
  • a phase detector PT1 preferably by 90 ° phase shifted carrier frequency PF passes over the other phase detector PT2, which receives the carrier frequency TF to the neutral phase.
  • three channels with preferably 0 o / 120 o / 240 o phase can also be provided.
  • the data SD to be transmitted arrive in a coded form at the phase modulator PM, from which the modulated transmission data SDm run to a transmission stage SEN and from which they are transmitted to the light line network NL via the network coupling device NKE.
  • the frequency divider FT divides the processor clock frequency, for example 12 MHz, down to the 100 kHz carrier frequency in accordance with a desired division ratio of here, for example, 120: 1.
  • the hazard reporting data GMD which arrive from the individual infrared receivers, are processed and processed in the microprocessor system MP, but this need not be explained further here.
  • the received data EDm transmitted via the light network NL reach the receiver EMP via the network coupling device NKE.
  • the receiver has the two phase detectors PT1 and PT2, on which the carrier frequency TF with 0 o and 90 o phase is also present.
  • the received data are sent from the phase detectors to the microprocessor system MP according to the components X and Y, ie EDX and EDY, via respective filters F, preferably low-pass filters and A / D converters.
  • the analog-digital converters provided for this purpose are integrated in the microprocessor system MP.
  • the angle corresponding to the data content is calculated in the microprocessor system MP from the two quadrature components, the demodulated received data EDX and EDY.
  • phase modulator PM consists of an exclusive-OR gate EXOR, to which the carrier frequency TF, for example 100 kHz, is supplied.
  • the binary input data SD are fed to the second input of the exclusive odor, so that the exclusive-OR gate generates a phase shift of 90 o or 180 o , ie the modulated carrier, at the output.
  • the transmitter stage SEN has a field effect transistor FTR which is driven directly via an AND gate AND. The second input of the AND gate AND is acted upon by an on / off command I / O from the microprocessor system MP.
  • the output of the transmitter stage SEN leads to a downstream filter FF, which attenuates the harmonics generated by the rectangular carrier.
  • the filter FF which is no longer described here, also serves to roughly limit the receiver bandwidth in the case of reception.
  • filters are known per se and also the network connection NKE used here. It is also not necessary to describe the low-pass filter TPF and the sample-and-hold circuit in more detail.

Abstract

The transmission system has a multiplicity of area central units in each case with associated danger alarm devices and a building alarm central unit (GZ), interconnected via existing lighting circuit lines (NL). Danger alarm data (GMD) from danger alarm detectors is transmitted from the danger alarm devices via infrared transmitters to the infrared receiving devices of the area central unit. This data is processed therein in a respective microprocessor system (MP) and transmitted as binary data via the line network (NKE; NL) to the building central unit and vice versa. This is carried out by means of the network transmission device (NUE) provided for this purpose which, by making use of the existing microprocessor system (MP), forms a carrier-frequency transmission system with phase modulation (PM; PD1, PD2), where the adjustable carrier frequency (TF) is stabilised by a quartz crystal (MQ). The transmission is performed in time-division multiplex mode in selectable channels, while the signal evaluation is carried out in the respective microprocessor system (MP). <IMAGE>

Description

Die Erfindung bezieht sich auf ein Datenübertragungssystem für eine kabellose Gefahrenmeldeanlage mit einer Vielzahl von Raumzentralen mit jeweils zugehörigen Gefahrenmeldeein­richtungen und einer Gebäude-Alarm-Zentrale, welche über bestehende Licht-Netzleitungen miteinander verbunden sind.The invention relates to a data transmission system for a wireless hazard detection system with a plurality of room control centers, each with associated hazard detection devices and a building alarm center, which are connected to one another via existing light mains cables.

Gefahrenmeldeanlagen und Übertragungseinrichtungen über Netz­leitungen sind an sich bekannt. In der deutschen Patent­anmeldung P 37 39 042.2 vom 17.11.87 wurde bereits ein kabel­loses Gefahrenmeldesystem mit mindestens einer Raumzentrale, die über vorhandene Netzleitungen mit einer Gebäudezentrale verbunden ist, vorgeschlagen. Dazu ist für die Datenüber­tragung zwischen den jeweiligen Raumzentralen und der Gebäude­zentrale eine jeweilige Netzübertragungseinrichtung erforder­lich, die dort jedoch nicht beschrieben ist.Hazard detection systems and transmission facilities via power lines are known per se. In German patent application P 37 39 042.2 dated November 17, 1987, a wireless hazard detection system with at least one room control center, which is connected to a building control center via existing power lines, has already been proposed. For this purpose, a respective network transmission device is required for the data transmission between the respective room control centers and the building control center, but this is not described there.

Für den Intrusionsschutz ist für die Signalübertragung binärer Gefahrenmeldedaten von den Sensoren bzw. Gefahrenmeldern zur Alarmzentrale eine hohe Störsicherheit und Sabotagesicherheit erforderlich. Um den hohen Installationsaufwand für die Er­richtung einer Gefahrenmeldeanlage zu vermeiden, werden die Daten zwischen der Raumzentrale und der Gebäudezentrale über ein bestehendes Lichtnetz übertragen. Dies erfordert hohe An­forderungen an ein derartiges Datenübertragungssystem im Hin­blick auf eine sichere und zuverlässige Übertragung der Ge­fahrenmeldedaten.For intrusion protection, a high level of interference immunity and sabotage security is required for the signal transmission of binary hazard detection data from the sensors or hazard detectors to the alarm center. In order to avoid the high installation effort for setting up a hazard alarm system, the data is transmitted between the room control center and the building control center via an existing lighting network. This places high demands on such a data transmission system with regard to a safe and reliable transmission of the hazard reporting data.

Es ist daher Aufgabe der Erfindung, für eine eingangs beschrie­bene Gefahrenmeldeanlage ein Datenübertragungssystem zu schaffen, welches eine hohe Ausfallsicherheit und Störsicher­heit und einen geringen Energieverbrauch aufweist.It is therefore an object of the invention to provide a data transmission system for a hazard detection system described in the introduction create, which has a high reliability and immunity to interference and a low energy consumption.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß unter Mitausnutzung des bereits in den jeweiligen Zentralen vor­handenen Mikroprozessorsystems für die Verarbeitung der binären Gefahrenmeldedaten mittels zusätzlich vorgesehener Netzüber­tragungseinrichtungen ein trägerfrequentes Übertragungssystem mit Phasen-Modulation gebildet ist, daß die einstellbare Trägerfrequenz vom Mikroprozessor-Quarz abgeleitet wird, daß die Übertragung im Zeitmultiplexbetrieb in selektiv wählbaren Frequenzkanälen erfolgt, und daß die Signalauswertung im jeweiligen Mikroprozessorsystem durchgeführt wird.This object is achieved in that a carrier-frequency transmission system with phase modulation is formed by using the microprocessor system already present in the respective control centers for the processing of the binary hazard reporting data by means of additionally provided network transmission devices, that the adjustable carrier frequency is derived from the microprocessor quartz that the transmission in time-division multiplex operation takes place in selectively selectable frequency channels, and that the signal evaluation is carried out in the respective microprocessor system.

Für das erfindungsgemäße Datenübertragungssystem ist kein je­weiliger eigener Mikroprozessor für die Netzübertragungsein­richtung erforderlich, weil in vorteilhafter Weise der bereits vorhandene Mikroprozessor in den Raumzentralen und der Gebäude-­Alarm-Zentrale für die eigentliche Datenübertragung, d.h. Senden und Empfangen über das Lichtnetz, herangezogen wird. Dabei erfolgt die Signalauswertung im vorhandenen Mikro­prozessor. Zudem wird als weiterer Vorteil der ebenfalls vorhandene Mikroprozessor-Quarz für die Ableitung der ein­stellbaren Trägerfrequenz mitgenutzt. Das hat den Vorteil einer sehr großen Frequenzkonstanz der Trägerfrequenz und einer sehr schmalen Bandbreite für die Sende- bzw. Empfangsdaten, so daß ein optimaler Störabstand erzielt wird. Damit ist eine optimale Reduzierung von Breitbandstörungen sowie Ausblendung von Linienstörungen, wie sie beispielsweise durch Vielfache der Zeilenfrequenz von Fernsehgeräten hervorgerufen werden, möglich.No separate microprocessor is required for the network transmission device for the data transmission system according to the invention, because the microprocessor already present in the room control centers and the building alarm center for the actual data transmission, i.e. Sending and receiving via the light network is used. The signals are evaluated in the existing microprocessor. In addition, the microprocessor quartz, which is also present, is used as a further advantage for the derivation of the adjustable carrier frequency. This has the advantage of a very high frequency constancy of the carrier frequency and a very narrow bandwidth for the transmit and receive data, so that an optimal signal-to-noise ratio is achieved. This enables an optimal reduction of broadband interference and suppression of line interference, such as those caused by multiples of the line frequency of television sets.

Weitere Einzelheiten und Vorteile des erfindungsgemäßen Daten­übertragungssystems ergeben sich aus den Unteransprüchen und den Erläuterungen zu einem möglichen Ausführungsbeispiel, welches anhand der Zeichnung im folgenden erläutert wird.Further details and advantages of the data transmission system according to the invention result from the subclaims and the explanations of a possible exemplary embodiment, which is explained below with reference to the drawing.

Dabei zeigenShow

  • Fig. 1 ein Blockschaltbild einer kabellosen Gefahrenmelde­anlage,1 is a block diagram of a wireless hazard detection system,
  • Fig. 2 ein Blockschaltbild einer Netzübertragungseinrichtung (Sender/Empfänger) mit bereits vorhandenem Mikroprozessor undFig. 2 is a block diagram of a network transmission device (transmitter / receiver) with an existing microprocessor and
  • Fig. 3 ein Schaltbeispiel eines Phasenmodulators mit nachgeschalteter Senderstufe.Fig. 3 is a circuit example of a phase modulator with a downstream transmitter stage.

In Fig. 1 ist schematisch eine kabellose Gefahrenmeldeanlage mit einer Vielzahl (z.B. i = 16) von Raumzentralen RZ1 bis RZi mit jeweils zugehörigen Infrarotsendern IRSn (z.B. n = 8 pro Raumzentrale RZ) und zugehörigen Gefahrenmeldern GM und mit einer Gebäude-Alarm-Zentrale GZ gezeigt. Die Gefahrenmelder GM sind über den zugehörigen Infrarotsender IRSn mit der Raumzentrale RZi, die entsprechend zugeordnete Infrarot­empfänger IRIn aufweist, verbunden. Diese Infrarotübertragungs­einrichtung innerhalb eines zu überwachenden Raumes ist in der oben bereits genannten deutschen Patentanmeldung P 37 39 042 beschrieben. Die in der Raumzentrale RZi empfangenen und mit dem dortigen Mikroprozessorsystem MP verarbeiteten und aufbe­reiteten Daten werden über eine Netzübertragungseinrichtung NUE über das vorhandene Licht-Leitungsnetz NL zur Gebäudezentrale GZ übertragen. Diese weist neben einem Mikroprozessorsystem MP und weiteren, hier nicht näher dargestellten Einrichtungen für die Alarmbearbeitung, Alarmausgabe AL und Störungsanzeige ST ebenfalls eine Netzübertragungseinrichtung NUE auf.In Fig. 1 is a wireless hazard detection system with a plurality (e.g. i = 16) of room control centers RZ1 to RZi with associated infrared transmitters IRSn (e.g. n = 8 per room control center RZ) and associated hazard detectors GM and with a building alarm center GZ shown. The GM hazard detectors are connected via the associated infrared transmitter IRSn to the room control center RZi, which has correspondingly assigned infrared receivers IRIn. This infrared transmission device within a room to be monitored is described in the above-mentioned German patent application P 37 39 042. The data received in the room control center RZi and processed and processed with the microprocessor system MP there are transmitted via a network transmission device NUE to the building control center GZ via the existing light line network NL. In addition to a microprocessor system MP and other devices for alarm processing, alarm output AL and fault display ST, which are not shown here, this also has a network transmission device NUE.

Erfindungsgemäß erfolgt die Datenübertragung mittels der Netz­übertragungseinrichtung NUE unter Mitausnützung des Mikro­prozessorsystems MP der jeweiligen Zentrale. Die dafür vorgesehene Netzübertragungseinrichtung NUE ist mit dem vorhandenen Mikroprozessorsystem MP und der Ankopplung NKE an das Licht-Leitungsnetz NL in der Fig. 2 im Blockschaltbild dargestellt.According to the invention, the data transmission takes place by means of the network transmission device NUE, with the use of the microprocessor system MP of the respective center. The network transmission device NUE provided for this purpose is shown with the existing microprocessor system MP and the coupling NKE to the light line network NL in FIG. 2 in the block diagram.

Gemäß der Fig. 2 weist die Netzübertragungseinrichtung NUE u.a. einen vom Mikroprozessorsystem MP mit einem Frequenzteiler FT beaufschlagten Frequenzsynthesizer FS auf, der mit der ausgewählten Trägerfrequenz PF, z.B. 100 kHz, den Phasen­modulator PM und über einen Phasensplitter PSP zwei Phasen­detektoren PT1 und PT2 ansteuert. An den einen Phasen­detektor PT1 gelangt die vorzugsweise um 90o phasenver­schobene Trägerfrequenz PF gegenüber dem anderen Phasen­detektor PT2, der die Trägerfrequenz TF mit der Nullphase erhält. In einem derartigen Übertragungssystem können auch drei Kanäle mit vorzugsweise 0o/120o/240o-Phase vorgesehen werden. Die zu sendenden Daten SD gelangen in einer codierten Form an den Phasenmodulator PM, von dem die modulierten Sendedaten SDm zu einer Sendestufe SEN laufen und von der sie über die Netzankopplungseinrichtung NKE auf das Licht-Leitungsnetz NL gegeben werden. Der Frequenzteiler FT teilt die Prozessor-Taktfrequenz, beispielsweise 12 MHz, entsprechend einem gewünschten Teilungsverhältnis von hier beispielsweise 120 : 1 auf die 100 kHz-Trägerfrequenz herunter. Die Gefahren­meldedaten GMD, die von den einzelnen Infrarotempfängern ankommen, werden im Mikroprozessorsystem MP verarbeitet und aufbereitet, was hier jedoch nicht weiter erläutert werden muß.According to FIG. 2, the network transmission device NUE has, inter alia, a frequency synthesizer FS which is supplied with a frequency divider FT by the microprocessor system MP and which controls the phase modulator PM with the selected carrier frequency PF, for example 100 kHz, and two phase detectors PT1 and PT2 via a phase splitter PSP. To a phase detector PT1 preferably by 90 ° phase shifted carrier frequency PF passes over the other phase detector PT2, which receives the carrier frequency TF to the neutral phase. In such a transmission system, three channels with preferably 0 o / 120 o / 240 o phase can also be provided. The data SD to be transmitted arrive in a coded form at the phase modulator PM, from which the modulated transmission data SDm run to a transmission stage SEN and from which they are transmitted to the light line network NL via the network coupling device NKE. The frequency divider FT divides the processor clock frequency, for example 12 MHz, down to the 100 kHz carrier frequency in accordance with a desired division ratio of here, for example, 120: 1. The hazard reporting data GMD, which arrive from the individual infrared receivers, are processed and processed in the microprocessor system MP, but this need not be explained further here.

Die über das Lichtnetz NL übertragenen Empfangsdaten EDm gelangen tiber die Netzankopplungseinrichtung NKE an den Empfänger EMP. Der Empfänger weist die beiden Phasendetektoren PT1 und PT2 auf, an denen auch die Trägerfrequenz TF mit 0o- und 90o-Phase ansteht. Von den Phasendetektoren werden die Empfangsdaten nach den Komponenten X und Y, also EDX und EDY, über jeweilige Filter F, vorzugsweise Tiefpässe, und A/D-­Wandler an das Mikroprozessorsystem MP gegeben. Die hierfür vorgesehenen Analog-Digital-Wandler sind in dem Mikro­prozessorsystem MP integriert. Aus den beiden Quadratur­komponenten, den demodulierten Empfangsdaten EDX und EDY, wird im Mikroprozessorsystem MP der Winkel berechnet, der dem Dateninhalt entspricht.The received data EDm transmitted via the light network NL reach the receiver EMP via the network coupling device NKE. The receiver has the two phase detectors PT1 and PT2, on which the carrier frequency TF with 0 o and 90 o phase is also present. The received data are sent from the phase detectors to the microprocessor system MP according to the components X and Y, ie EDX and EDY, via respective filters F, preferably low-pass filters and A / D converters. The analog-digital converters provided for this purpose are integrated in the microprocessor system MP. The angle corresponding to the data content is calculated in the microprocessor system MP from the two quadrature components, the demodulated received data EDX and EDY.

Bei diesem Datenübertragungssystem ist es möglich, in der Gebäude-Alarm-Zentrale durch kurzen Testbetrieb, der regel­ mäßig für alle vorgesehenen Übertragungskanäle, z.B. 20, durch­geführt wird, das Signal-Rausch-Verhältnis des Systems zu ermitteln und in Abhängigkeit vom optimalen Verhältnis einen betreffenden Kanal auszuwählen. Eine solche Frequenz-Kanal­optimierung ist nicht nur vor Inbetriebnahme des Übertragungs­systems möglich, sondern auch während des Betriebes, so daß dieses Übertragungssystem immer selbsttätig den optimalen Kanal auswählen kann. Es ist damit auch möglich, in einem Gebäude­komplex mehrere Übertragungskanäle gleichzeitig auf verschie­denen Kanälen zu betreiben.With this data transmission system it is possible to carry out a short test operation in the building alarm center is carried out moderately for all intended transmission channels, for example 20, to determine the signal-to-noise ratio of the system and to select a relevant channel as a function of the optimal ratio. Such frequency-channel optimization is possible not only before the transmission system is started up, but also during operation, so that this transmission system can always select the optimal channel automatically. It is therefore also possible to operate several transmission channels simultaneously on different channels in a building complex.

In Fig. 3 ist ein Schaltbeispiel des Phasenmodulators PM und der schaltbaren Senderstufe SEN gezeigt. Der Phasenmodulator PM besteht aus einem Exclusiv-Oder-Gatter EXOR, dem die Träger­frequenz TF, z.B. 100 kHz, zugeführt wird. Dem zweiten Eingang des Exclusiv-Oders werden die binären Sendedaten SD zugeführt, so daß das Exclusiv-Oder-Gatter am Ausgang eine Phasendrehung von 90o oder 180o, d.h. den modulierten Träger, erzeugt. Die Senderstufe SEN weist einen Feldeffekttransistor FTR auf, der über ein UND-Gatter AND direkt angesteuert wird. Der zweite Eingang des UND-Gatters AND ist mit einem Ein/Ausschaltbefehl E/A vom Mikroprozessorsystem MP beaufschlagt. Der Ausgang der Senderstufe SEN führt auf ein nachgeschaltetes Filter FF, welches die Oberwellen, die vom rechteckigen Träger erzeugt werden, bedämpft. Das Filter FF, das hier nicht mehr beschrieben ist, dient im Falle des Empfangs zugleich zur groben Begrenzung der Empfängerbrandbreite. Derartige Filter sind an sich bekannt sowie auch die hier verwendete Netzankopplung NKE. Ebenso ist es nicht erforderlich, die Tiefpaßfilter TPF und die Sample-and-Hold-Schaltung näher zu beschreiben.3 shows a switching example of the phase modulator PM and the switchable transmitter stage SEN. The phase modulator PM consists of an exclusive-OR gate EXOR, to which the carrier frequency TF, for example 100 kHz, is supplied. The binary input data SD are fed to the second input of the exclusive odor, so that the exclusive-OR gate generates a phase shift of 90 o or 180 o , ie the modulated carrier, at the output. The transmitter stage SEN has a field effect transistor FTR which is driven directly via an AND gate AND. The second input of the AND gate AND is acted upon by an on / off command I / O from the microprocessor system MP. The output of the transmitter stage SEN leads to a downstream filter FF, which attenuates the harmonics generated by the rectangular carrier. The filter FF, which is no longer described here, also serves to roughly limit the receiver bandwidth in the case of reception. Such filters are known per se and also the network connection NKE used here. It is also not necessary to describe the low-pass filter TPF and the sample-and-hold circuit in more detail.

Mit diesem Übertragungssystem ist es möglich, digitale Daten über das Lichtnetz innerhalb eines Gebäudekomplexes zuver­lässig zu übertragen, so daß es für die besonderen An­forderungen in einem Intrusionsschutzsystem besonders geeignet ist.With this transmission system it is possible to reliably transmit digital data via the lighting network within a building complex, so that it is particularly suitable for the special requirements in an intrusion protection system.

Claims (7)

1. Datenübertragungssystem für eine kabellose Gefahren­meldeanlage mit einer Vielzahl (i) von Raumzentralen (RZi) mit jeweils zugehörigen Gefahrenmeldeeinrichtungen (IRSn, GM) und einer Gebäude-Alarm-Zentrale (GZ), welche über bestehende Licht-Netzleitungen (NL) miteinander verbunden sind, wobei jede Raumzentrale (RZ) neben Infrarot-Empfangsein­richtungen und die Gebäudezentrale (GZ) jeweils ein Mikro­prozessorsystem (MP) zur Verarbeitung der Gefahrenmeldedaten (GMD) aufweisen,
dadurch gekennzeichnet,
daß unter Mitaus­nutzung des Mikroprozessorsystems (MP) mittels zusätzlicher vorgesehener Netzübertragungseinrichtungen (NUE) ein träger­frequentes Übertragungssystem mit Phasen-Modulation gebildet ist, daß die einstellbare Trägerfrequenz von einem Schwing-­Quarz stabilisiert ist, daß die Übertragung im Zeitmultiplex­betrieb in selektiv wählbaren Frequenz-Kanälen erfolgt, und daß die Signalauswertung im jeweiligen Mikroprozessorsystem (MP) durchgeführt wird.1. Data transmission system for a wireless hazard detection system with a large number (i) of room control centers (RZi) with associated hazard detection devices (IRSn, GM) and a building alarm center (GZ), which are connected to each other via existing light mains cables (NL) , each room control center (RZ) in addition to infrared receiving devices and the building control center (GZ) each having a microprocessor system (MP) for processing the hazard reporting data (GMD),
characterized by
that by using the microprocessor system (MP) by means of additional network transmission devices (NUE), a carrier-frequency transmission system with phase modulation is formed, that the adjustable carrier frequency is stabilized by a quartz crystal, that the transmission takes place in time-division multiplex operation in selectively selectable frequency channels, and that the signal evaluation is carried out in the respective microprocessor system (MP). 2. Datenübertragungssystem nach Anspruch 1,
dadurch gekennzeichnet, daß die Netz­übertragungseinrichtung (NUE) im wesentlichen folgende Kompo­nenten aufweist:
a) einen Frequenzsynthesizer (FS), der von einem Phased-Looked-­Loop-System oder einem Frequenzteiler gebildet und von einem Quarzgenerator synchronisiert ist, wobei die erzeugte Träger­frequenz (TF) einem Phasenmodulator (PM) und einem Phasensplit­ter (PSP) zugeführt wird; b) einen Phasenmodulator (PM), der die Sendedaten (SD) in der Phase und Amplitude moduliert, wobei die Phase und Amplitude von den zu übertragenden Sendedaten abgeleitet sind; c) einen Sender (SEN), der die modulierten Sendedaten (SDm) vom Modulator (PM) verstärkt und über eine Netzankopplungsein­richtung (NKE), die den Trägerfrequenzbereich von der Netz­frequenz trennt, auf die Licht-Netzleitung (NL) gibt; d) einen Empfänger (EMP), der mindestens zwei Phasendetektoren (PD1 und PD2) und nachgeschaltete Filter (F) sowie A/D-Wandler (A/D) aufweist und die Daten dem Mikroprozessorsystem (MP) zuführt, wobei die Phasendetektoren jeweils von den modulierten Empfangsdaten (EDm) und von dem Phasensplitter (PSP) mit (Δφ1 - φ2) beaufschlagt sind. 2. Data transmission system according to claim 1,
characterized in that the network transmission device (NUE) essentially has the following components:
a) a frequency synthesizer (FS) which is formed by a phased-look-loop system or a frequency divider and is synchronized by a quartz generator, the generated carrier frequency (TF) being fed to a phase modulator (PM) and a phase splitter (PSP); b) a phase modulator (PM), which modulates the transmission data (SD) in phase and amplitude, the phase and amplitude being derived from the transmission data to be transmitted; c) a transmitter (SEN), which amplifies the modulated transmission data (SDm) from the modulator (PM) and outputs it via a network coupling device (NKE), which separates the carrier frequency range from the network frequency, to the light network line (NL); d) a receiver (EMP), which has at least two phase detectors (PD1 and PD2) and downstream filters (F) and A / D converter (A / D) and feeds the data to the microprocessor system (MP), the phase detectors each from the modulated received data (EDm) and from the phase splitter (PSP) with (Δφ1 - φ2). 3. Datenübertragungssystem nach Anspruch 2,
dadurch gekennzeichnet, daß der Quarz­generator von dem Mikroprozessor-Quarz (MQ) und einem Frequenzteiler (FT) des Mikroprozessorsystems (MP) gebildet ist.3. Data transmission system according to claim 2,
characterized in that the quartz generator is formed by the microprocessor quartz (MQ) and a frequency divider (FT) of the microprocessor system (MP). 4. Datenübertragungssystem nach Anspruch 2,
dadurch gekennzeichnet, daß die Amplitude vom Mikroprozessorsystem her ein-/ausgeschaltet wird.4. Data transmission system according to claim 2,
characterized in that the amplitude is switched on / off by the microprocessor system. 5. Datenübertragungssystem nach Anspruch 2,
dadurch gekennzeichnet, daß die Amplitude zum Erreichen eines schmalbandigen Sendespektrums eine spezielle Kurvenform erhält.5. Data transmission system according to claim 2,
characterized in that the amplitude is given a special curve shape in order to achieve a narrow-band transmission spectrum. 6. Datenübertragungssystem nach Anspruch 2,
dadurch gekennzeichnet, daß zur Digitali­sierung der demodulierten Empfangsdaten (EDX, EDY) Analog-­Digital-Wandler (A/D) vorgesehen sind, die im Mikroprozessor­system (MP) integriert sind.6. Data transmission system according to claim 2,
characterized in that analog-digital converters (A / D) are provided for digitizing the demodulated received data (EDX, EDY) and are integrated in the microprocessor system (MP). 7. Datenübertragungssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet,
daß bei Eintreten von Übertragungsstörungen eine automatische Frequenz-Störanalyse durch das Mikroprozessorsystem (MP) durchgeführt wird und aufgrund dieser Analyse ein automatischer Wechsel auf den optimalen Frequenz-Kanal erfolgt.7. Data transmission system according to one of the preceding claims, characterized in that
that when transmission interference occurs, an automatic frequency interference analysis is carried out by the microprocessor system (MP) and, based on this analysis, an automatic change to the optimal frequency channel takes place.
EP89105072A 1988-04-19 1989-03-21 Data transmission system for a wireless danger signal arrangement Expired - Lifetime EP0338274B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813075 1988-04-19
DE3813075 1988-04-19

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EP0338274A1 true EP0338274A1 (en) 1989-10-25
EP0338274B1 EP0338274B1 (en) 1994-08-31

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EP89105072A Expired - Lifetime EP0338274B1 (en) 1988-04-19 1989-03-21 Data transmission system for a wireless danger signal arrangement

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EP (1) EP0338274B1 (en)
AT (1) ATE110870T1 (en)
DE (1) DE58908251D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29609583U1 (en) * 1996-05-30 1996-08-22 Roehrig Karl Heinz Alarm system
US6327245B1 (en) 1995-06-30 2001-12-04 Philips Electronics North America Corporation Automatic channel switching for jamming avoidance in burst-mode packet data wireless communication networks
WO2003098845A2 (en) * 2002-05-16 2003-11-27 Michel Cuvelier Infrared connection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266985A1 (en) * 1974-04-03 1975-10-31 Orion Radio Radio communication method for service conversations - has message and distance monitoring signal transmission in digital form

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
FR2266985A1 (en) * 1974-04-03 1975-10-31 Orion Radio Radio communication method for service conversations - has message and distance monitoring signal transmission in digital form

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Title
ELEKTRONIK, Band 32, Nr. 20, 7. Oktober 1983, Seiten 100-104, München, DE; R. KÜNZEL: "Datenübertragung über das 220-V-Netz" *
T.N. NACHRICHTEN, Nr. 90, September 1986, Seiten 24-29, Frankfurt au Main, DE; U. OPPELT: "Das Meldesystem MZ 1000" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6327245B1 (en) 1995-06-30 2001-12-04 Philips Electronics North America Corporation Automatic channel switching for jamming avoidance in burst-mode packet data wireless communication networks
DE29609583U1 (en) * 1996-05-30 1996-08-22 Roehrig Karl Heinz Alarm system
WO2003098845A2 (en) * 2002-05-16 2003-11-27 Michel Cuvelier Infrared connection device
WO2003098845A3 (en) * 2002-05-16 2004-01-15 Michel Cuvelier Infrared connection device

Also Published As

Publication number Publication date
ATE110870T1 (en) 1994-09-15
EP0338274B1 (en) 1994-08-31
DE58908251D1 (en) 1994-10-06

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