EP1630758B1 - Scattered light smoke detector - Google Patents
Scattered light smoke detector Download PDFInfo
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- EP1630758B1 EP1630758B1 EP04023740A EP04023740A EP1630758B1 EP 1630758 B1 EP1630758 B1 EP 1630758B1 EP 04023740 A EP04023740 A EP 04023740A EP 04023740 A EP04023740 A EP 04023740A EP 1630758 B1 EP1630758 B1 EP 1630758B1
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- Prior art keywords
- scattered light
- signals
- smoke detector
- der
- detector according
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
- G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
-
- 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
- G08B29/18—Prevention or correction of operating errors
- G08B29/20—Calibration, including self-calibrating arrangements
-
- 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
- G08B29/18—Prevention or correction of operating errors
- G08B29/20—Calibration, including self-calibrating arrangements
- G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Definitions
- the present invention relates to a scattered light smoke detector with an opto-electronic device for measuring stray signals at a forward and a backward scattering angle, and with evaluation electronics for obtaining a measured value from the stray signals and the comparison of an alarm value derived therefrom with an alarm threshold.
- the JP 11 160238 A describes a photoelectric ionization smoke detector for discriminating white and black smoke. At least two light receivers are used for this, so that the emitted light can be received by a light transmitter at different scattering angles. By evaluating the received light, a distinction is made between white and black smoke.
- the US 6218950 B1 describes a scattered light detector for the evaluation of scattered light signals.
- the microprocessor-based scattered light detector measures scattered light signals at two scattered light angles and determines an alarm parameter.
- An alarm value is determined by the ratio of the scattered light signals and subsequent comparison with the specific alarm parameter.
- the US 5726633 describes a multi-sensor smoke detector having at least one ionization and one photoelectric sensor. Coefficients are determined for each sensor output and combined accordingly in a processing work.
- the use of the difference of the stray signals or smoke signals for the formation of the measured value instead of a weighting of the measured value as a function of the ratio of the stray signals has the advantage that much less computer effort is needed and thus a short response time of the detector is ensured.
- the difference of the scattered signals as well as their quotient allows the recognition of the type of smoke.
- a first preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that said linear combination takes place according to the formula [k 1 (BW + FW) + k 2 (BW-FW)], in which k 1 and k 2 are two among others are constants influenced by an application factor dependent on the environmental conditions at the intended installation location of the detector.
- k 1 and k 2 are two among others are constants influenced by an application factor dependent on the environmental conditions at the intended installation location of the detector.
- 0 ⁇ k 1 . k 2 ⁇ 5 preferably 0 ⁇ k 1 . k 2 ⁇ 3.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Die vorliegende Erfindung betrifft einen Streulicht-Rauchmelder mit einer opto-elektronischen Anordnung zur Messung von Streusignalen unter einem Vorwärts- und einem Rückwärtsstreuwinkel, und mit einer Auswerteelektronik für die Gewinnung eines Messwerts aus den Streusignalen und den Vergleich eines von diesem abgeleiteten Alarmwerts mit einer Alarmschwelle.The present invention relates to a scattered light smoke detector with an opto-electronic device for measuring stray signals at a forward and a backward scattering angle, and with evaluation electronics for obtaining a measured value from the stray signals and the comparison of an alarm value derived therefrom with an alarm threshold.
Die
Die
Die
Es ist schon lange bekannt, dass das bei Vorwärts- und Rückwärtsstreuung die beiden Streulichtanteile für verschiedene Arten von Bränden in charakteristischer Weise verschieden sind. Dieses Phänomen ist beispielsweise in der
Durch die Erfindung soll nun die Fehlalarmsicherheit der Streulicht-Rauchmelder der eingangs genannten Art erhöht werden, wobei gleichzeitig ein möglichst rasches Ansprechen gewährleistet sein soll.
Diese Aufgabe wird erfindungsgemäss durch einen Streulicht-Rauchmelder nach Anspruch 1 und ein Verfahren nach Anspruch 19 gelöst.It has long been known that in forward and backward scattering, the two stray light components are characteristically different for different types of fires. This phenomenon is for example in the
With the invention, the false alarm safety of the scattered light smoke detector of the type mentioned is now to be increased, at the same time the fastest possible response should be ensured.
This object is achieved by a scattered light smoke detector according to claim 1 and a method according to
Die Verwendung der Differenz der Streusignale oder Rauchsignale für die Bildung des Messwerts anstatt einer Gewichtung des Messwerts in Abhängigkeit vom Verhältnis der Streusignale hat den Vorteil, dass wesentlich weniger Rechneraufwand benötigt wird und somit eine kurze Ansprechzeit des Melders gewährleistet ist. Die Differenz der Streusignale ermöglicht ebenso wie deren Quotient die Erkennung der Rauchart.The use of the difference of the stray signals or smoke signals for the formation of the measured value instead of a weighting of the measured value as a function of the ratio of the stray signals has the advantage that much less computer effort is needed and thus a short response time of the detector is ensured. The difference of the scattered signals as well as their quotient allows the recognition of the type of smoke.
Eine erste bevorzugte Ausführungsform des erfindungsgemässen Streulicht-Rauchmelders ist dadurch gekennzeichnet, dass die genannte lineare Verknüpfung nach der Formel [k1(BW+FW) + k2(BW-FW)] erfolgt, in welcher k1 und k2 zwei unter anderem von einem von den Umgebungsbedingungen am vorgesehenen Installationsort des Melder abhängigen Applikationsfaktor beeinflusste Konstanten sind. Für die genannten Konstanten gilt 0 < k1. k2 < 5, vorzugsweise 0< k1. k2 ≤ 3.A first preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that said linear combination takes place according to the formula [k 1 (BW + FW) + k 2 (BW-FW)], in which k 1 and k 2 are two among others are constants influenced by an application factor dependent on the environmental conditions at the intended installation location of the detector. For the stated constants, 0 <k 1 . k 2 <5, preferably 0 <k 1 . k 2 ≤ 3.
Der Applikationsfaktor ist anwendungsspezifisch wählbar, und zwar vorzugsweise in Abhängigkeit von einem den Anforderungen des Kunden entsprechenden Satz von Einstellparametern des Melders.
Eine Zweite bevorzugte Ausführungsform des erfindungsgemässen Streulicht-Rauchmelders ist dadurch gekennzeichnet, dass eine Verarbeitung des Messwerts in zwei Pfaden erfolgt, dass im ersten Pfad eine Bestimmung des Typs des betreffenden Feuers erfolgt und ein entsprechendes Steuersignal gebildet wird und im zweiten Pfad eine Verarbeitung des genannten Messwerts und dessen Vergleich mit einer Alarmschwelle erfolgt, und dass die Verarbeitung des Messwerts im zweiten Pfad durch das im ersten Pfad gebildete Steuersignal gesteuert ist.
Eine dritte bevorzugte Ausführungsform des erfindungsgemässen Streulicht-Rauchmelders ist dadurch gekennzeichnet, dass bei der Bestimmung des Typs des betreffenden Feuers eine Unterscheidung nach Schwelbrand und offenem Brand und gegebenenfalls weiteren Brandarten erfolgt.
Eine vierte bevorzugte Ausführungsform ist dadurch gekennzeichnet, dass die Verarbeitung des Messwerts im zweiten Pfad eine Begrenzung des Messwerts in einer nachfolgend als Slope Regler bezeichneten Stufe umfasst, wobei eine Beschränkung des Messwerts auf ein bestimmtes Niveau oder dessen Verstärkung durch Addition eines Zusatzsignals erfolgt.
Eine weitere bevorzugte Ausführungsform des erfindungsgemässen Streulicht-Rauchmelders ist dadurch gekennzeichnet, dass der Slope Regler sowohl einen raschen Anstieg des Messwerts aufgrund von Signalspitzen verhindert als auch langsame Signalanstiege bei Schwelbränden akzentuiert. Vorzugsweise ist der Slope Regler durch das im ersten Pfad gebildete Steuersignal gesteuert. Im Slope Regler wird durch eine sehr langsame Filterung des Messwerts ein langsames Rauchsignal gewonnen.
Weitere bevorzugte Weiterentwicklungen und Verbesserungen des erfindungsgemässen Streulicht-Rauchmelders sind in den Ansprüchen 12 bis 18 beansprucht.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels und der Zeichnungen näher erläutert; es zeigt:
- Fig. 1 eine schematische Blockbilddarstellung eines erfindungsgemässen Rauchmelders; und
- Fig. 2 einschematisches Blockdiagramm der Signalverarbeitung des Rauchmelders von Fig. 1.
Die
Zur besseren Diskriminierung zwischen verschiedenen Aerosolen können im Strahlengang sender- und/oder empfängerseitig aktive oder passive Polarisationsfilter vorgesehen sein. Als weitere Option können als
Der Melder 1 macht beispielsweise alle 2 Sekunden eine Messung, wobei die Vorwärts- und die Rückwärts-Streulichtsignale sequentiell erzeugt werden. Die Signale der Empfangsdiode, die nachfolgend als Sensorsignale bezeichnet werden, werden in einem
Der Sensor Control Software ist zusätzlich zu den Streusignalen SB und SF noch ein Offset-Signal OF zugeführt. Dieses ist das Ausgangssignal der Empfangsdiode 4, wenn diese nicht mit Streulicht von einer der beiden
Die Verarbeitung der Signale der verschiedenen Sensoren mit der Sensor Control Software 13 soll nun anhand von Fig. 2 erläutert werden: Zuerst erfolgt eine getrennte Vorverarbeitung sowohl der Streusignale SB und SF sowie des Offsetsignals OF einerseits als auch der Signale T1, T2 der
In der
Das Temperatursignal T gelangt ausserdem in eine mit dem
Die in der
In der
Das Ergebnis der linearen Verknüpfung ist der am Ausgang der
Jeder Melder 1 besitzt einen an die Umgebung seines Installationsortes und an Wünsche des Kunden angepassten Satz geeigneter Parameter, das ist der so genannte Parametersatz. Dieser ist beim Melder 1 beispielsweise von der kritischen Feuergrösse, dem Brandrisiko, dem Personenrisiko, der Wertkonzentration, der Raumgeometrie und von Täuschungsgrössen abhängig, wobei die Täuschungsgrössen beispielsweise durch nicht von einem Feuer herrührenden Rauch, Abgase, Dampf, Staub, Fasern oder elektromagnetische Störungen gebildet sein können. Bei der linearen Verknüpfung der Rauchwerte gemäss Formel 1 gilt für die beiden Applikationsfaktoren k1 und k2: 0 < k1. k2 < 5, vorzugsweise 0 < k1. k2 ≤ 3.
In der
Der Messwert S wird vom Ausgangl der Extraktionsstufe 20 einerseits der schon erwähnten Bewertungsstufe 21 und andererseits einer
Zur Bestimmung des Störungskriteriums werden die aus der Standardabweichung berechneten Störungen (Medianfilter 19) mit einem Schwellwert verglichen. Zur Bestimmung des Monotoniekriteriums wird die bei der abgeleiteten Analyse in
Der Ausgang der Bewertungsstufe 21 ist
In einigen Parametersätzen möchte man beispielsweise rein optische, also nur durch Rauch verursachte Alarme verbieten, beschränken oder unterstützen. Dazu verwendet man eine Methode, die den Messwert S beim Anstieg auf einen bestimmten Wert beschränkt und anderseits aus einem verzögerten Rauchsignal einen bestimmten Maximalwert ableitet, und dann je nachdem, ob eine Zündung erfolgt ist, einen der beiden Werte für die weitere Verarbeitung verwendet. Dadurch erfolgt einerseits eine Beschränkung von sehr schnellen, durch Signalspitzen verursachten Anstiegen des Messwerts S und andererseits eine Betonung (Unterstützung) von durch Schwelbrände verursachten sehr langsam ansteigenden Signalen.
Am Ausgang
Der Rauchwert S' und der Temperaturwert T' werden in Form von je zwei Werten Wos und Wop beziehungsweise Wts und Wtp verarbeitet, dabei bedeutet:
- Wos Gewicht des optischen Pfades für Summenbildung
- Wop Gewicht des optischen Pfades für Produktbildung
- Wts Gewicht des thermischen Pfades für Summenbildung
- Wtp Gewicht des thermischen Pfades für Produktbildung.
In einer auf die Gefahrensignal-
A second preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the measured value is processed in two paths, that the type of fire in question is determined in the first path and a corresponding control signal is formed and in the second path a processing of said measured value and its comparison with an alarm threshold, and that the processing of the measurement value in the second path is controlled by the control signal formed in the first path.
A third preferred embodiment of the inventive scattered light smoke detector is characterized in that when determining the type of fire in question, a distinction to smoldering fire and open fire and possibly other types of fire takes place.
A fourth preferred embodiment is characterized in that the processing of the measured value in the second path comprises a limitation of the measured value in a level hereinafter referred to as Slope controller, wherein a limitation of the measured value to a certain level or its gain takes place by addition of an additional signal.
A further preferred embodiment of the scattered-light smoke detector according to the invention is characterized in that the slope controller both prevents a rapid increase in the measured value due to signal peaks and accentuates slow signal increases in the case of smoldering fires. Preferably, the slope controller is that in the first path controlled control signal controlled. In the slope regulator, a slow smoke signal is obtained by very slowly filtering the measured value.
Further preferred developments and improvements of the inventive scattered light smoke detector are claimed in
In the following the invention will be explained in more detail with reference to an embodiment and the drawings; it shows:
- 1 shows a schematic block diagram of a smoke detector according to the invention; and
- FIG. 2 is a schematic block diagram of the signal processing of the smoke detector of FIG. 1. FIG.
The
For better discrimination between different aerosols can be provided in the beam path transmitter and / or receiver side active or passive polarizing filter. As a further option, 2 and 3 diodes can be used as light sources emitting radiation in the wavelength range of visible light (see
For example, the detector 1 makes a measurement every 2 seconds, whereby the forward and backward scattered light signals are generated sequentially. The signals of the receiving diode, which are hereinafter referred to as sensor signals, are freed in a
In addition to the scatter signals SB and SF, the sensor control software also supplies an offset signal OF. This is the output signal of the receiving diode 4, if it is not exposed to stray light from one of the two
The processing of the signals of the various sensors with the
In the
The temperature signal T also passes into a designated with the
The pre-processed in
In the
The result of the linear combination is the so-called measured value S available at the output of the
Each detector 1 has a set of suitable parameters adapted to the environment of its installation location and to the wishes of the customer, this is the so-called parameter set. This is the detector 1, for example, on the critical fire size, the fire risk, the personal risk, the value concentration, the space geometry and deception sizes, the deception sizes, for example, formed by non-fire smoke, exhaust gases, steam, dust, fibers or electromagnetic interference could be. For the linear combination of the smoke values according to formula 1, for the two application factors k 1 and k 2 : 0 <k 1 . k 2 <5, preferably 0 <k 1 . k 2 ≤ 3.
In the
The measured value S is supplied from the output 1 of the
To determine the interference criterion, the interferences calculated from the standard deviation (median filter 19) are compared with a threshold value. To determine the monotonicity criterion, the monotonicity of the sensor signal calculated in the derived analysis in the
The output of the
In some parameter sets, for example, one would like to prohibit, restrict or support purely optical alarms, that is, only smoke-induced alarms. For this purpose, a method is used which restricts the measured value S to a certain value during the rise and, on the other hand, derives a specific maximum value from a delayed smoke signal and then uses one of the two values for further processing, depending on whether ignition has taken place. On the one hand, this results in a limitation of very rapid rises in the measured value S caused by signal peaks, and on the other hand an emphasis (support) for very slowly rising signals caused by smoldering fires.
Two signals are available at the output of the
The smoke value S 'and the temperature value T' are processed in the form of two values W os and W op or W ts and W tp , where:
- W os Weight of the optical path for summation
- W op Weight of the optical path for product formation
- W ts Weight of the thermal path for summation
- W tp Weight of the thermal path for product formation.
In a
Claims (19)
- Scattered light smoke detector with an optoelectronic arrangement for measurement of scatter signals (SB, SF) detected below at least one forward scatter angle and one backscatter angle, and with evaluation electronics (12) for obtaining a measured value from the scatter signals (SB, SF), characterized in that the scattered light smoke detector features a median filter (19) for obtaining backward and forward smoke signals (BW, FW) from the backscatter and forward scatter signals (SB, SF), with the median filter (19) obtaining the backward and forward smoke signals (BW, FW) from the difference between the median value selected of a number of consecutive values of the backscatter and forward scatter signals (SB, SF) and the average value of the said consecutive values of the backscatter and forward scatter signals (SB, SF) as regards the sequence, and that the measured value (S) being formed by a linear linkage of the sum of the scatter signals (SB, SF) or smoke signals (BW, FW) with the difference between the smoke signals (BW, FW).
- Scattered light smoke detector according to claim 1, characterized in that the said linear linking is undertaken using the formula [k1(BW+FW) + k2(BW-FW)], in which k1 and k2 are two constants influenced inter alia by an application factor dependent on one of the environmental conditions at the intended installation site of the detector.
- Scattered light smoke detector according to claim 2, characterized in that the following applies for said constants: 0 < k1. k2 < 5, preferably 0 < k1. k2 ≤ 3.
- Scattered light smoke detector according to claim 2,
characterized in that the application factor is able to be selected for a specific application. - Scattered light smoke detector according to claim 4, characterized in that the application factor is able to be detected depending on a set of setting parameters of the detector (1) corresponding to the requirements of the customer.
- Scattered light smoke detector according to one of the claims 1 to 5, characterized in that the measured value (S) is processed in two paths, that in the first path (21, 23) the type of fire involved is determined and a corresponding control signal is formed and in the second path (22, 25-30) the measured value (S) is processed and is compared with an alarm threshold, and that the processing of the measured value (S) in the second path (22, 25-30) is controlled by the control signal formed in the first path (21, 23).
- Scattered light smoke detector according to claim 6, characterized in that, when the type of fire involved is being determined, a distinction is made between smoldering fire and open fire and where necessary further fire types.
- Scattered light smoke detector according to claim 7, characterized in that the processing of the measured value (S) in the second path (22, 25-30) includes a restriction of the measured value (S) in a stage subsequently referred to as slope regulator (22), with a restriction of the measured value (S) to a specific level or its amplification by addition of a supplementary signal.
- Scattered light smoke detector according to claim 8, characterized in that the slope regulator (22) both prevents a rapid increase in the measured value (S) as a result of signal peaks and also accentuates slow signal increases with smoldering fires.
- Scattered light smoke detector according to claim 9, characterized in that the slope regulator (22) is controlled by the control signal formed in the first path (21, 23).
- Scattered light smoke detector according to claim 10, characterized in that a slow smoke signal (S+) is obtained in the slope regulator (22) by a very slow filtering of the measured value (S).
- Scattered light smoke detector according to claim 11, characterized in that at least one temperature sensor (5, 6) arranged in or on the housing of the detector (1) is provided for measuring the ambient temperature of the detector (1) and for outputting the appropriate temperature signal (T).
- Scattered light smoke detector according to claim 12, characterized in that the alarm is determined, from the output signal of the slope regulator (22) subsequently referred to as the smoke value (S'), from the slow smoke signal (S+) and from the temperature value (T) .
- Scattered light smoke detector according to claim 13, characterized in that both a summation (26) and a product formation (27) are undertaken with the smoke value (S') and the temperature value (T').
- Scattered light smoke detector according to claim 14, characterized in that the smoke value (S') and the temperature value (T') are each processed in the form of two values (Wos, Wop or Wts, Wtp), with Wos designating the weight of the optical path for the summation, Wop the weight of the optical path for the product formation, Wts the weight of the thermal path for the summation and Wtp the weight of the thermal path for the product formation.
- Scattered light smoke detector according to claim 15, characterized in that the signal with the highest value is selected from the result of the summation and the product formation and compared with the alarm threshold.
- Scattered light smoke detector according to claim 16, characterized in that, by comparing the said signal with the highest value to various alarm thresholds the signal is assigned to different risk levels and subsequently these risk levels are verified.
- Scattered light smoke detector according to claim 17, characterized in that the verification of the risk levels is controlled by the control signal formed in the first path (21, 22).
- Method for forming a measured value with a scattered light smoke detector featuring an optoelectronic arrangement for measurement of scatter signals (SB, SF) below a forward scatter angle and a backscatter angle, and with evaluation electronics (12) for obtaining a measured value from the scatter signals (SB, SF), characterized in that a median filter (19) of the scattered light smoke detector is used for obtaining backward and forward smoke signals (BW, FW) from the backscatter and forward scatter signals (SB, SF), with the median filter (19) obtaining the backward and forward smoke signals (BW, FW) from the difference between the median value selected from a number of consecutive values of the backscatter and forward scatter signals (SB, SF) and the average value of the said consecutive values of the backscatter and forward scatter signals (SB, SF) as regards the sequence and the measured value (S) being formed by a linear linkage of the sum of the scatter signals (SB, SF) or smoke signals (BW, FW) and the difference between the smoke signals (BW, FW).
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04023740A EP1630758B1 (en) | 2004-08-31 | 2004-10-06 | Scattered light smoke detector |
PCT/EP2005/055076 WO2006037804A1 (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
KR1020077009287A KR20070058647A (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
AU2005291248A AU2005291248A1 (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
CNA2005800340892A CN101036173A (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
RU2007116951/09A RU2007116951A (en) | 2004-10-06 | 2005-10-06 | SMOKE SIGNALS USING DIFFERENT LIGHT |
MX2007004102A MX2007004102A (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector. |
CA002583731A CA2583731A1 (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
BRPI0516553-9A BRPI0516553A (en) | 2004-10-06 | 2005-10-06 | stray light smoke detector |
US11/664,874 US7777634B2 (en) | 2004-10-06 | 2005-10-06 | Scattered light smoke detector |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04020577A EP1630759B1 (en) | 2004-08-31 | 2004-08-31 | Scattered-light smoke detector |
EP04023740A EP1630758B1 (en) | 2004-08-31 | 2004-10-06 | Scattered light smoke detector |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1630758A2 EP1630758A2 (en) | 2006-03-01 |
EP1630758A3 EP1630758A3 (en) | 2006-03-08 |
EP1630758B1 true EP1630758B1 (en) | 2008-01-02 |
Family
ID=35520197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04023740A Not-in-force EP1630758B1 (en) | 2004-08-31 | 2004-10-06 | Scattered light smoke detector |
Country Status (10)
Country | Link |
---|---|
US (1) | US7777634B2 (en) |
EP (1) | EP1630758B1 (en) |
KR (1) | KR20070058647A (en) |
CN (1) | CN101036173A (en) |
AU (1) | AU2005291248A1 (en) |
BR (1) | BRPI0516553A (en) |
CA (1) | CA2583731A1 (en) |
MX (1) | MX2007004102A (en) |
RU (1) | RU2007116951A (en) |
WO (1) | WO2006037804A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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TWI456531B (en) * | 2011-10-24 | 2014-10-11 | Panasonic Corp | Smoke sensor |
CN109601019A (en) * | 2016-08-25 | 2019-04-09 | 西门子瑞士有限公司 | For carrying out the method for fire detection and such scattered light smoke warner according to scattering light principle, by for connecting different wave length alternately with the other LED unit for the other optical pulse strikes for scattering angular |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1630758B1 (en) | 2004-08-31 | 2008-01-02 | Siemens Schweiz AG | Scattered light smoke detector |
EP1884904A1 (en) * | 2006-07-26 | 2008-02-06 | Siemens Schweiz AG | Danger type determination by means of at least two signals |
EP2565858A1 (en) * | 2007-03-09 | 2013-03-06 | Xtralis Technologies Ltd | Method and system for particle detection |
TW201007634A (en) * | 2008-08-06 | 2010-02-16 | Univ Nat Taiwan | Fire-fighting detection system and its weighting-value correction method |
DE102010015467B4 (en) * | 2010-04-16 | 2012-09-27 | Winrich Hoseit | Fire detector for monitoring a room |
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- 2005-10-06 AU AU2005291248A patent/AU2005291248A1/en not_active Abandoned
- 2005-10-06 WO PCT/EP2005/055076 patent/WO2006037804A1/en active Application Filing
- 2005-10-06 MX MX2007004102A patent/MX2007004102A/en not_active Application Discontinuation
- 2005-10-06 CA CA002583731A patent/CA2583731A1/en not_active Abandoned
- 2005-10-06 KR KR1020077009287A patent/KR20070058647A/en not_active Application Discontinuation
- 2005-10-06 US US11/664,874 patent/US7777634B2/en not_active Expired - Fee Related
- 2005-10-06 BR BRPI0516553-9A patent/BRPI0516553A/en not_active IP Right Cessation
- 2005-10-06 RU RU2007116951/09A patent/RU2007116951A/en not_active Application Discontinuation
- 2005-10-06 CN CNA2005800340892A patent/CN101036173A/en active Pending
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CN109601019A (en) * | 2016-08-25 | 2019-04-09 | 西门子瑞士有限公司 | For carrying out the method for fire detection and such scattered light smoke warner according to scattering light principle, by for connecting different wave length alternately with the other LED unit for the other optical pulse strikes for scattering angular |
CN109601019B (en) * | 2016-08-25 | 2021-07-06 | 西门子瑞士有限公司 | Method for fire detection based on the scattered light principle and scattered light smoke alarm |
Also Published As
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AU2005291248A1 (en) | 2006-04-13 |
RU2007116951A (en) | 2008-11-20 |
CA2583731A1 (en) | 2006-04-13 |
KR20070058647A (en) | 2007-06-08 |
US7777634B2 (en) | 2010-08-17 |
CN101036173A (en) | 2007-09-12 |
EP1630758A2 (en) | 2006-03-01 |
EP1630758A3 (en) | 2006-03-08 |
BRPI0516553A (en) | 2008-09-09 |
WO2006037804A1 (en) | 2006-04-13 |
MX2007004102A (en) | 2007-06-15 |
US20090009347A1 (en) | 2009-01-08 |
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