EP0362798B1 - Method for the energy-saving operation of risk detectors in a risk detection arrangement - Google Patents
Method for the energy-saving operation of risk detectors in a risk detection arrangement Download PDFInfo
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- EP0362798B1 EP0362798B1 EP89118339A EP89118339A EP0362798B1 EP 0362798 B1 EP0362798 B1 EP 0362798B1 EP 89118339 A EP89118339 A EP 89118339A EP 89118339 A EP89118339 A EP 89118339A EP 0362798 B1 EP0362798 B1 EP 0362798B1
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- 238000000034 method Methods 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 title description 14
- 230000011664 signaling Effects 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 238000004886 process control Methods 0.000 description 1
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- 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
- G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade
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- the invention relates to a method for the energy-saving operation of hazard detectors in a hazard detection system, which operates in the pulse detection system according to the principle of chain synchronization, with a control center with several two-wire primary reporting lines, to which a plurality of detectors are connected in a chain, which are routinely operated from the control center cyclically controlled and queried for their respective analog detector measured value, each detector having a voltage measuring device that monitors the line voltage applied, a downstream logic logic with an associated sensor, a downstream control device, an energy store and a switching transistor, the logic logic being formed by a microcomputer.
- Such a hazard detection system is known from DE-PS 25 33 382.
- the individual detectors are connected in a chain to the detection line.
- the measured values of the individual detectors are queried cyclically from the control center and sent to the central evaluation device in order to obtain differentiated fault or alarm messages from the analog values to be linked.
- all detectors are separated from the detection line by a voltage change and then switched on again in a predetermined order in such a way that each detector, after a time delay corresponding to its measured value, by means of a switching transistor arranged in one of the wires of the detection line, additionally the following detectors turns on.
- the respective detector address is derived from the number of previous increases in the line current and the analog measured value from the length of the relevant switching delays.
- the detectors are operated from their energy storage during this time. After the query, the energy stores are recharged during the so-called rest period with increased line voltage.
- Control commands can also be transmitted from the control center to the individual detectors, which are received by the individual detectors, as is already known from DE-PS 25 33 354.
- the data received and reported by the individual detectors can also be transmitted in the form of pulse telegrams within certain time windows.
- the object of the invention is to provide, while avoiding the disadvantages described above, a method for the energy-saving operation of hazard detectors of a hazard detection system, which allows a relatively simple and reliable switching on and off of a microcomputer.
- This object is achieved with a method described in the introduction in that the microcomputer is switched into an energy-saving idle state and switched on again as a function of certain switching criteria that are specific to the hazard alarm system, with a required start-up time being guaranteed for the microcomputer.
- the special feature of the method according to the invention is that no additional and complex criteria have to be created specifically. Rather, switching criteria are used for switching the microcomputer on and off in the respective detector, which are specific to a hazard alarm system and already exist, i.e. which are used and designed in a special way for this.
- the microcomputer is used as a function of a specific line voltage (a switch-off voltage) switched to the power-saving idle state and switched on again with the application of another predetermined line voltage, a switch-on voltage, so that the detector is activated after a certain start-up time.
- a specific line voltage a switch-off voltage
- the cut-off voltage is expediently formed from the idle voltage which is present anyway and the cut-off voltage from the start voltage likewise required for the cyclical interrogation, which is generally zero and thus switches off all detectors in a line.
- the microcomputer switches itself into the idle state when the detector in question switches through to the next detector via its switching transistor.
- a multiplicity of detectors M1 to Mn are connected to a control center here, for example, only on one reporting primary line ML.
- the line current IL flows on the signaling line and the line voltage UL is present, which can be switched to different values.
- the detector M shown in FIG. 2 has, in addition to the switching transistor T switched on in the one wire of the detection line ML the logic logic, which is the heart of the detector and is formed by a microcomputer.
- the logic logic serves the actual sensor part.
- the logic logic VL is acted upon by the voltage measuring device, which monitors the line voltage and gives switching functions to the logic logic VL in accordance with the line voltage applied.
- This logic logic causes signals to a control device ST and also signals to turn on the switching transistor T so that the following detector is connected to the line voltage. It is also indicated by a capacitor C in the detector of the energy store, which is charged when a voltage is applied in the idle state and supplies the detector with energy when required in the disconnected state.
- Fig. 3 shows how the individual detectors are switched on in sequence.
- the line voltage UL is plotted against the time t for the detectors M1 to M3.
- the rest voltage UR is present on the detection line ML.
- An interrogation cycle then begins by separating the line from the line voltage, i.e. the starting voltage US, which is generally zero, is applied for the starting time ts. After the start time TS has elapsed, the actual query of the entire detection line for the time tla begins.
- the interrogation voltage UA is generally below the value of the quiescent voltage UR. It is shown for the detector M2 that it only receives the interrogation voltage UA after the DS of the first detector M1 has been switched through. The same applies to detector M3.
- the data transmission to the detector generally takes place by modulating the line voltage UL in the control center, while data transmission to the control center is carried out by modulating the line current IL in the detector.
- the microcomputer switches itself into the energy-saving idle state when it receives the signal from the voltage measuring device MU that the control center Z has applied the open circuit voltage UR (is the cutoff voltage UAB).
- the open circuit voltage UR is the cutoff voltage UAB.
- All the microcomputers (U) are switched off and have only a minimal power consumption in the time tr in which the quiescent voltage UR is applied.
- All the microcomputers are inactive and can neither operate the sensor section S nor accept or process control commands or send requests from the control center. This is also not necessary in the transmission system based on the principle of chain synchronization.
- the microcomputers (VL) in all detectors (Mn) are only reactivated when the starting voltage US is applied (is equal to the switch-on voltage UAN), operate the sensor part S and are at the different times for the transmission of the query voltage UA for the individual detectors from and to the headquarters.
- the start time ts corresponds to the start-up time tan for the microcomputer, ie a sufficiently long settling time is available.
- the microcomputer only needs significant energy during the short time, which is composed of the start time ts and the line query time tla.
- the microcomputer switches itself into the energy-saving idle state when it switches through to the next detector via its assigned switching transistor T in the detection line ML (DS).
- T in the detection line ML ML
- the time in which the microcomputers are switched off and have minimal power consumption is further extended.
- the first detector in the line is then in the power-saving state for almost the entire line inquiry time Tla, so that on average all detectors, the microcomputers for half the line inquiry time tla, are active and require energy, which means that the corresponding energy requirement of a signaling primary line continues, to almost half, is reduced.
- the microcomputers are only active for a few percent of the total time and therefore use little energy.
- This method according to the invention advantageously does not require any circuit extensions worth mentioning compared to the known method of pulse signaling technology.
- the improved performance characteristics are achieved in that the microcomputer in the individual detectors is equipped accordingly, e.g. B. by expanding the control program (firmware).
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Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum energiesparenden Betrieb von Gefahrenmeldern in einer Gefahrenmeldeanlage, die im Pulsmeldesystem nach dem Prinzip der Kettensynchronisation arbeitet, mit einer Zentrale mit mehreren zweiadrigen Meldeprimärleitungen, an die kettenförmig eine Vielzahl von Meldern angeschlossen ist, die regelmäßig von der Zentrale aus zyklisch angesteuert und auf ihren jeweiligen analogen Meldermeßwert abgefragt werden, wobei jeder Melder eine Spannungsmeßeinrichtung, die die angelegte Linienspannung überwacht, eine nachgeschaltete Verknüpfungslogik mit zugeordnetem Sensor, eine nachgeschaltete Steuereinrichtung, einen Energiespeicher und einen Durchschaltetransistor aufweist, wobei die Verknüpfungslogik von einem Mikrorechner gebildet ist.The invention relates to a method for the energy-saving operation of hazard detectors in a hazard detection system, which operates in the pulse detection system according to the principle of chain synchronization, with a control center with several two-wire primary reporting lines, to which a plurality of detectors are connected in a chain, which are routinely operated from the control center cyclically controlled and queried for their respective analog detector measured value, each detector having a voltage measuring device that monitors the line voltage applied, a downstream logic logic with an associated sensor, a downstream control device, an energy store and a switching transistor, the logic logic being formed by a microcomputer.
Eine derartige Gefahrenmeldeanlage ist aus der DE-PS 25 33 382 bekannt. Bei dieser Gefahrenmeldeanlage, insbesondere Brandmeldeanlage, zur Übertragung von analogen Meldermeßwerten sind die einzelnen Melder kettenförmig an der Meldelinie angeschlossen. Dabei werden die Meßwerte der einzelnen Melder zyklisch von der Zentrale aus abgefragt und zur zentralen Auswerteeinrichtung gegeben, um dort daraus differenzierte Störungs- bzw. Alarmmeldungen aus den zu verknüpfenden Analogwerten zu gewinnen. Zu Beginn eines jeden Abfragezyklus werden alle Melder durch eine Spannungsänderung von der Meldelinie abgetrennt und dann in vorgegebener Reihenfolge in der Weise wieder angeschaltet, daß jeder Melder nach einer seinem Meßwert entsprechenden Zeitverzögerung mittels eines in einer der Adern der Meldelinie angeordneten Durchschaltetransistors den jeweils nachfolgenden Melder zusätzlich anschaltet.Such a hazard detection system is known from DE-PS 25 33 382. In this hazard alarm system, in particular fire alarm system, for the transmission of analog detector measured values, the individual detectors are connected in a chain to the detection line. The measured values of the individual detectors are queried cyclically from the control center and sent to the central evaluation device in order to obtain differentiated fault or alarm messages from the analog values to be linked. At the beginning of each interrogation cycle, all detectors are separated from the detection line by a voltage change and then switched on again in a predetermined order in such a way that each detector, after a time delay corresponding to its measured value, by means of a switching transistor arranged in one of the wires of the detection line, additionally the following detectors turns on.
In der zentralen Auswerteeinrichtung wird die jeweilige Melderadresse aus der Anzahl der vorhergehenden Erhöhungen des Linienstroms und der analoge Meßwert aus der Länge der betreffenden Schaltverzögerungen abgeleitet. Die Melder werden während dieser Zeit aus ihrem Energiespeicher betrieben. Die Energiespeicher werden nach der Abfrage in der sogenannten Ruhezeit mit erhöhter Linienspannung wieder aufgeladen.In the central evaluation device, the respective detector address is derived from the number of previous increases in the line current and the analog measured value from the length of the relevant switching delays. The detectors are operated from their energy storage during this time. After the query, the energy stores are recharged during the so-called rest period with increased line voltage.
In zunehmendem Maße benötigen Gefahrenmelder eine hochwertige Sensorik und Ubertragungstechnik. Anstatt einer Kollektivadresse wird eine Einzeladressierung verlangt, wie dies bei der oben geschilderten Gefahrenmeldeanlage der Fall ist. Es können auch von der Zentrale aus Steuerbefehle an die einzelnen Melder übertragen werden, die von den einzelnen Meldern empfangen werden, wie bereits aus der DE-PS 25 33 354 bekannt ist. Es können die Daten, die von den einzelnen Meldern empfangen und gemeldet werden, auch in Form von Pulstelegrammen innerhalb bestimmter Zeitfenster übermittelt werden.Increasingly, hazard detectors require high-quality sensors and transmission technology. Instead of a collective address, individual addressing is required, as is the case with the hazard alarm system described above. Control commands can also be transmitted from the control center to the individual detectors, which are received by the individual detectors, as is already known from DE-PS 25 33 354. The data received and reported by the individual detectors can also be transmitted in the form of pulse telegrams within certain time windows.
Wegen der hohen Kosten des Leitungsnetzes werden immer mehr Melder an einer Meldeprimärleitung betrieben. Alle diese Einflüsse vergrößern den Energiebedarf der einzelnen Melder und erst recht den Energiebedarf der mit mehreren Meldern bestückten Meldeprimärleitung. Besonders problematisch wird es, wenn die Funktionsanforderungen den Einsatz von schnellen Mikrorechnern mit ihrem erheblichen Energiebedarf auch in den Meldern erforderlich machen und wenn über dieselbe Leitung auch noch die notwendige Energie zugeführt wird, wie bisher üblich.Due to the high cost of the line network, more and more detectors are operated on a primary signal line. All of these influences increase the energy requirements of the individual detectors, and even more so the energy requirements of the primary line with several detectors. It becomes particularly problematic if the functional requirements also require the use of fast microcomputers with their considerable energy requirements in the detectors and if the necessary energy is also supplied via the same line, as was previously the case.
Es ist beispielsweise bekannt, stromsparende Schaltkreistechniken, z.B. CMOS zu verwenden und spezielle Sensoren, z.B. den Meßteil eines optischen Streulicht-Rauchmelders gepulst zu betreiben. Ferner ist bekannt, um den Spannungsabfall auf der Meldelinie genügend klein zu halten, diese mit dickem Draht und kurz auszuführen, was natürlich die Kosten erhöht und/oder dem Wunsch zuwiderläuft, eine Vielzahl von Meldern auf einer Leitung zu betreiben. Ebenfalls bekannt ist die Möglichkeit, die nötige Energie ganz oder teilweise getrennt, z.B. über eine eigene Leitung zuzuführen, was ebenfalls die Komplexität und die Kosten einer Gefahrenmeldeanlage erhöht.It is known, for example, to use power-saving circuit technologies, for example CMOS, and to operate special sensors, for example the pulsed measuring part of an optical stray light smoke detector. It is also known, in order to keep the voltage drop on the detection line sufficiently small, to carry it out with thick wire and short, which of course increases the costs and / or runs counter to the desire to operate a large number of detectors on one line. Also known is the possibility of supplying the necessary energy in whole or in part separately, for example via a separate line, which is also complex and the cost of a hazard alarm system increases.
Es ist ganz allgemein schon vorgeschlagen worden, Mikrorechner abzuschalten, wenn sie nicht benötigt werden, um deren Energieverbrauch zu reduzieren. Das hat aber in der Regel den Nachteil, daß einerseits geeignete Kriterien für das Aus- und Einschalten nicht verfügbar bzw. nur mit großem, zusätzlichen Aufwand herstellbar sind und andererseits das Einschalten eines Mikrorechners relativ lange dauert, weil z.B. der Taktgenerator mehrere Millisekunden lang anschwingen muß, bevor er funktionsfähig ist.It has been proposed in general to switch off microcomputers when they are not needed in order to reduce their energy consumption. However, this usually has the disadvantage that, on the one hand, suitable criteria for switching off and on are not available or can only be produced with great additional effort, and on the other hand, switching on a microcomputer takes a relatively long time, because e.g. the clock generator must oscillate for several milliseconds before it is functional.
Aufgabe der Erfindung ist es, unter Vermeidung der oben geschilderten Nachteile ein Verfahren zum energiesparenden Betreiben von Gefahrenmeldern einer Gefahrenmeldeanlage an zugeben, welches ein verhältnismäßig einfaches und zuverlässiges An- und Abschalten eines Mikrorechners gestattet.The object of the invention is to provide, while avoiding the disadvantages described above, a method for the energy-saving operation of hazard detectors of a hazard detection system, which allows a relatively simple and reliable switching on and off of a microcomputer.
Diese Aufgabe wird mit einem eingangs beschriebenen Verfahren dadurch gelöst, daß der Mikrorechner in Abhängigkeit von bestimmten Schaltkriterien, die spezifisch für die Gefahrenmeldeanlage sind, in einen stromsparenden Ruhezustand geschaltet und wieder eingeschaltet wird, wobei eine erforderliche Anlaufzeit für den Mikrorechner gewährleistet ist.This object is achieved with a method described in the introduction in that the microcomputer is switched into an energy-saving idle state and switched on again as a function of certain switching criteria that are specific to the hazard alarm system, with a required start-up time being guaranteed for the microcomputer.
Das besondere bei dem erfindungsgemäßen Verfahren besteht darin, daß keine zusätzlichen und aufwendigen Kriterien eigens geschaffen werden müssen. Vielmehr werden für das An- und Abschalten des Mikrorechners im jeweiligen Melder Schaltkriterien herangezogen, die für eine Gefahrenmeldeanlage spezifisch sind und bereits vorhanden sind, d.h. die in besonderer Weise hierfür genutzt und ausgestaltet werden.The special feature of the method according to the invention is that no additional and complex criteria have to be created specifically. Rather, switching criteria are used for switching the microcomputer on and off in the respective detector, which are specific to a hazard alarm system and already exist, i.e. which are used and designed in a special way for this.
So wird beispielsweise in einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens der Mikrorechner in Abhängigkeit von einer bestimmten Linienspannung (einer Abschaltspannung) in den stromsparenden Ruhezustand geschaltet und mit dem Anlegen einer anderen vorgegebenen Linienspannung, einer Anschaltspannung wieder eingeschaltet, so daß der Melder nach einer gewissen Anlaufzeit aktiviert ist. Dabei wird zweckmäßigerweise die Abschaltspannung von der ohnehin vorhandenen Ruhespannung gebildet und die Anschaltspannung von der ebenfalls für die zyklische Abfrage erforderliche Startspannung, die in der Regel Null beträgt und damit alle Melder einer Linie abschaltet.For example, in an advantageous embodiment of the method according to the invention, the microcomputer is used as a function of a specific line voltage (a switch-off voltage) switched to the power-saving idle state and switched on again with the application of another predetermined line voltage, a switch-on voltage, so that the detector is activated after a certain start-up time. The cut-off voltage is expediently formed from the idle voltage which is present anyway and the cut-off voltage from the start voltage likewise required for the cyclical interrogation, which is generally zero and thus switches off all detectors in a line.
In einer weiteren Ausgestaltung der Erfindung schaltet der Mikrorechner sich selbst in den Ruhezustand, wenn der betreffende Melder über seinen Durchschaltetransistor zum nächsten Melder durchschaltet.In a further embodiment of the invention, the microcomputer switches itself into the idle state when the detector in question switches through to the next detector via its switching transistor.
Im folgenden wird das erfindungsgemäße Verfahren näher erläutert, dabei wird zum besseren Verständnis das bekannte Pulsmeldesystem anhand der Zeichnung erläutert.
Dabei zeigen
- Fig. 1
- eine schematische Darstellung einer Gefahrenmeldeanlage,
- Fig. 2
- schematisch einen Melder in der Melderprimärleitung und
- Fig. 3
- Linienspannungsdiagramme für drei Melder.
Show
- Fig. 1
- a schematic representation of a hazard detection system,
- Fig. 2
- schematically a detector in the primary detector line and
- Fig. 3
- Line voltage diagrams for three detectors.
Bekanntermaßen sind an eine Zentrale beispielsweise hier nur an einer Meldeprimärleitung ML eine Vielzahl von Meldern M1 bis Mn angeschlossen. Auf der Meldeleitung fließt der Linienstrom IL und es liegt die Linienspannung UL an, die auf verschiedene Werte umschaltbar ist.As is known, a multiplicity of detectors M1 to Mn are connected to a control center here, for example, only on one reporting primary line ML. The line current IL flows on the signaling line and the line voltage UL is present, which can be switched to different values.
Der in Fig.2 gezeigte Melder M weist neben den in der einen Ader der Meldelinie ML eingeschalteten Durchschaltetransistor T die Verknüpfungslogik auf, die das Herzstück des Melders darstellt und von einem Mikrorechner gebildet ist. Die Verknüpfungslogik bedient das eigentliche Sensorteil. Die Verknüpfungslogik VL ist von der Spannungsmeßeinrichtung beaufschlagt, welche die Linienspannung überwacht und entsprechend der angelegten Linienspannung Schaltfunktionen an die Verknüpfungslogik VL gibt. Diese Verknüpfungslogik veranlaßt Signale an eine Steuereinrichtung ST und auch Signale zum Durchschalten des Durchschaltetransistors T, damit der nachfolgende Melder an die Linienspannung angeschlossen wird. Es ist noch durch einen Kondensator C im Melder der Energiespeicher angedeutet, der im Ruhezustand beim Anliegen einer Ruhespannung aufgeladen wird und im abgetrennten Zustand den Melder bei Bedarf mit Energie versorgt.The detector M shown in FIG. 2 has, in addition to the switching transistor T switched on in the one wire of the detection line ML the logic logic, which is the heart of the detector and is formed by a microcomputer. The logic logic serves the actual sensor part. The logic logic VL is acted upon by the voltage measuring device, which monitors the line voltage and gives switching functions to the logic logic VL in accordance with the line voltage applied. This logic logic causes signals to a control device ST and also signals to turn on the switching transistor T so that the following detector is connected to the line voltage. It is also indicated by a capacitor C in the detector of the energy store, which is charged when a voltage is applied in the idle state and supplies the detector with energy when required in the disconnected state.
In Fig.3 ist nochmals veranschaulicht, wie die einzelnen Melder der Reihe nach angeschaltet werden. Dabei ist die Linienspannung UL über der Zeit t aufgetragen für die Melder M1 bis M3. Während der Ruhezeit tr liegt auf der Meldelinie ML die Ruhespannung UR an. Ein Abfragezyklus beginnt dann mit dem Abtrennen der Linie von der Linienspannung, d.h. es wird für die Startzeit ts die Startspannung US, die im allgemeinen gleich Null ist, angelegt. Nach Ablauf der Startzeit TS beginnt die eigentliche Abfrage der gesamten Meldelinie für die Zeit tla. Die Abfragespannung UA liegt hierfür im allgemeinen unter dem Wert der Ruhespannung UR. Für den Melder M2 ist gezeigt, daß er erst nach dem Durchschalten DS des ersten Melders M1 die Abfragespannung UA erhält. Gleiches gilt für den Melder M3.Fig. 3 shows how the individual detectors are switched on in sequence. The line voltage UL is plotted against the time t for the detectors M1 to M3. During the rest period tr, the rest voltage UR is present on the detection line ML. An interrogation cycle then begins by separating the line from the line voltage, i.e. the starting voltage US, which is generally zero, is applied for the starting time ts. After the start time TS has elapsed, the actual query of the entire detection line for the time tla begins. For this purpose, the interrogation voltage UA is generally below the value of the quiescent voltage UR. It is shown for the detector M2 that it only receives the interrogation voltage UA after the DS of the first detector M1 has been switched through. The same applies to detector M3.
Die Datenübertragung zum Melder geschieht im allgemeinen durch Modulation der Linienspannung UL in der Zentrale, während eine Datenübertragung zur Zentrale durch die Modulation des Linienstroms IL im Melder vorgenommen wird.The data transmission to the detector generally takes place by modulating the line voltage UL in the control center, while data transmission to the control center is carried out by modulating the line current IL in the detector.
Mit dem erfindungsgemäßen Verfahren schaltet sich der Mikrorechner selbst in den stromsparenden Ruhezustand, wenn er von der Spannungsmeßeinrichtung MU das Signal erhält, daß die Zentrale Z die Ruhespannung UR (ist gleich Abschaltspannung UAB) angelegt hat. Das bedeutet, daß in der Zeit tr, in der die Ruhespannung UR anliegt, alle Mikrorechner (U) abgeschaltet sind und nur einen minimalen Stromverbrauch haben. Dabei sind alle Mikrorechner inaktiv und können weder den Sensorteil S bedienen noch Steuerbefehle oder Sendeaufforderungen von der Zentrale entgegennehmen oder bearbeiten. Dies ist bei dem Übertragungssystem nachdem Prinzip der Kettensynchronisation auch nicht nötig. Erst mit dem Anlegen der Startspannung US (ist gleich Anschaltspannung UAN) werden die Mikrorechner (VL) in allen Meldern (Mn) wieder aktiviert, bedienen der Sensorteil S und stehen bei den für die einzelnen Melder unterschiedlichen Zeitpunkte des Anlegen der Abfragespannung UA für die Ubertragung von und zu der Zentrale zur Verfügung. Dabei entspricht die Startzeit ts der Anlaufzeit tan für den Mikrorechner, d.h., es steht eine ausreichend lange Einschwingzeit zur Verfügung. Somit benötigt in vorteilhafter Weise der Mikrorechner nur während der kurzen Zeit, die sich aus der Startzeit ts und der Linienabfragezeit tla zusammensetzt, nennenswerte Energie.With the method according to the invention, the microcomputer switches itself into the energy-saving idle state when it receives the signal from the voltage measuring device MU that the control center Z has applied the open circuit voltage UR (is the cutoff voltage UAB). This means that all the microcomputers (U) are switched off and have only a minimal power consumption in the time tr in which the quiescent voltage UR is applied. All the microcomputers are inactive and can neither operate the sensor section S nor accept or process control commands or send requests from the control center. This is also not necessary in the transmission system based on the principle of chain synchronization. The microcomputers (VL) in all detectors (Mn) are only reactivated when the starting voltage US is applied (is equal to the switch-on voltage UAN), operate the sensor part S and are at the different times for the transmission of the query voltage UA for the individual detectors from and to the headquarters. The start time ts corresponds to the start-up time tan for the microcomputer, ie a sufficiently long settling time is available. In an advantageous manner, the microcomputer only needs significant energy during the short time, which is composed of the start time ts and the line query time tla.
In einer weiteren Ausgestaltung des erfindungsgemäßen Verfahrens schaltet sich der Mikrorechner selbst in den stromsparenden Ruhezustand, wenn er über seinen zugeordneten Durchschaltetransistor T in der Meldelinie ML zum nächsten Melder durchschaltet (DS). Auf diese Weise wird die Zeit, in der die Mikrorechner abgeschaltet sind und nur einen minimalen Stromverbrauch haben, weiter verlängert. Der erste Melder in der Linie ist dann für fast die gesamte Linienabfragezeit Tla im stromsparenden Zustand, so daß im Mittel alle Melder die Mikrorechner für die halbe Linienabfragezeit tla aktiv sind und Energie benötigen, womit der entsprechende Energiebedarf einer Meldeprimärleitung weiter, auf nahezu die Hälfte, reduziert wird. Insgesamt sind also die Mikrorechner nur noch wenige Prozent der Gesamtzeit aktiv und verbrauchen entsprechend wenig Energie.In a further embodiment of the method according to the invention, the microcomputer switches itself into the energy-saving idle state when it switches through to the next detector via its assigned switching transistor T in the detection line ML (DS). In this way, the time in which the microcomputers are switched off and have minimal power consumption is further extended. The first detector in the line is then in the power-saving state for almost the entire line inquiry time Tla, so that on average all detectors, the microcomputers for half the line inquiry time tla, are active and require energy, which means that the corresponding energy requirement of a signaling primary line continues, to almost half, is reduced. Overall, the microcomputers are only active for a few percent of the total time and therefore use little energy.
Dieses erfindungsgemäße Verfahren benötigt in vorteilhafter Weise keine gegenüber dem bekannten Verfahren der Pulsmeldetechnik nennenswerte Schaltungserweiterungen. Die verbesserten Leistungseigenschaften werden dadurch erreicht, daß der Mikrorechner in den einzelnen Meldern entsprechend ausgestattet ist, z. B. durch Erweiterung des Steuerprogramms (firmware).This method according to the invention advantageously does not require any circuit extensions worth mentioning compared to the known method of pulse signaling technology. The improved performance characteristics are achieved in that the microcomputer in the individual detectors is equipped accordingly, e.g. B. by expanding the control program (firmware).
Claims (4)
- Method for the energy-saving operation of alarm detectors in an alarm signalling system which works according to the principle of chain synchronisation in the pulse alarm system, having a central station (Z) with a plurality of two-wire primary alarm lines (ML) to which a multiplicity of detectors (Mn) are connected in the manner of a chain, said detectors being regularly cyclically polled by the central station (Z) and interrogated for their respective analog detector measured value, in which each detector (Mn) has a voltage measuring means (MU) which monitors the applied line voltage (UL), a downstream logic circuit (VL) with associated sensor part (S), a downstream control device (St), an energy store (C) and a switching transistor (T), the logic circuit (VL) being essentially formed by a microprocessor that can be switched on and off, characterised in that the microprocessor can be switched into an energy-saving idle state and switched on again in dependence on certain switching criteria specific to the alarm signalling system, a required warm-up time (tan) for the microprocessor being ensured.
- Method according to Claim 1, characterised in that the microprocessor switches itself into the idle state in dependence on a specific line voltage (switch-off voltage UAB) and switches itself on again upon the application of another predetermined line voltage (switch-on voltage UAN), so that the detector is activated after a given warm-up time (tan).
- Method according to Claim 2, characterised in that the specific line voltage (UAB) is equal to the open-circuit voltage (UR) and the other line voltage (UAN) is equal to the starting voltage (US), and in that the warm-up time (tan) is formed from the starting time (ts).
- Method according to Claim 1, characterised in that the microprocessor switches itself into the idle state when the respective detector switches through (DS) to the next detector via its switching transistor (T).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89118339T ATE101445T1 (en) | 1988-10-06 | 1989-10-03 | PROCEDURE FOR ENERGY-SAVING OPERATION OF SECURITY DETECTORS IN A SECURITY DETECTION SYSTEM. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3834044 | 1988-10-06 | ||
| DE3834044 | 1988-10-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0362798A2 EP0362798A2 (en) | 1990-04-11 |
| EP0362798A3 EP0362798A3 (en) | 1991-01-16 |
| EP0362798B1 true EP0362798B1 (en) | 1994-02-09 |
Family
ID=6364535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89118339A Revoked EP0362798B1 (en) | 1988-10-06 | 1989-10-03 | Method for the energy-saving operation of risk detectors in a risk detection arrangement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0362798B1 (en) |
| AT (1) | ATE101445T1 (en) |
| DE (1) | DE58906937D1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59108262D1 (en) * | 1990-12-18 | 1996-11-14 | Siemens Ag | Hazard detection system |
| CA2427147C (en) | 2000-11-09 | 2008-12-30 | Orica Explosives Technology Pty Ltd | Sensor for monitoring electronic detonation circuits |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2131991B (en) * | 1982-11-12 | 1986-05-29 | Robert Philp | Telemetry and like signaling systems |
| DE3313137A1 (en) * | 1983-04-12 | 1984-10-18 | Siemens AG, 1000 Berlin und 8000 München | CIRCUIT ARRANGEMENT FOR CANCELING NOISE IN OPTICAL SMOKE DETECTORS |
| KR910008738B1 (en) * | 1987-02-20 | 1991-10-19 | 닛본 덴기 가부시기가이샤 | Portable radio apparatus having battery saved channel scanning function |
-
1989
- 1989-10-03 EP EP89118339A patent/EP0362798B1/en not_active Revoked
- 1989-10-03 AT AT89118339T patent/ATE101445T1/en not_active IP Right Cessation
- 1989-10-03 DE DE89118339T patent/DE58906937D1/en not_active Revoked
Also Published As
| Publication number | Publication date |
|---|---|
| EP0362798A3 (en) | 1991-01-16 |
| DE58906937D1 (en) | 1994-03-24 |
| EP0362798A2 (en) | 1990-04-11 |
| ATE101445T1 (en) | 1994-02-15 |
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