EP0926646A1 - Optischer Rauchmelder - Google Patents
Optischer Rauchmelder Download PDFInfo
- Publication number
- EP0926646A1 EP0926646A1 EP97122894A EP97122894A EP0926646A1 EP 0926646 A1 EP0926646 A1 EP 0926646A1 EP 97122894 A EP97122894 A EP 97122894A EP 97122894 A EP97122894 A EP 97122894A EP 0926646 A1 EP0926646 A1 EP 0926646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- receiver
- smoke detector
- detector according
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- G08B17/11—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 an optical smoke detector with a detector insert, an optics module and an evaluation circuit, the optics module being a Light source, a measuring chamber and one connected to the evaluation circuit Has light receiver.
- the invention is now a stray light detector with a significantly improved Response behavior to open fires can be specified.
- this object is achieved in that the light source for transmission radiation in the wavelength range of visible light.
- the wavelength of the radiation emitted by the light source is in the range of blue or red light and is preferably 460 nm or 660 nm.
- Backscatter are known to be scattered light detectors with a scattering angle of over 90 °, which better recognize open fires, but where the receiver signal only one Fraction of the receiver signal from forward spreaders is.
- the reason for this improved Detection of open fires is likely to be due to the shorter wavelengths Smaller aerosols, such as those that arise especially in the case of open fires, very much can be better detected.
- the optics module is designed so that it goes from the light receiver to the evaluation circuit emitted signal a function of the impinging on it, in a Plane is polarized stray light.
- a third preferred embodiment of the smoke detector according to the invention is characterized in that a superimposition of the signal in the evaluation circuit of the light receiver with a compensation signal, which is selected so that the signal of the light receiver is adjusted to zero.
- the light source and the light receiver are arranged such that their optical axes lie in a common horizontal plane and with each other are kinked.
- labyrinth parts serve the radiation of the light source and the Limit the field of view of the light receiver and light coming from outside at the entrance into the measuring chamber. The better the labyrinth fulfills these functions, the more it hinders the penetration of smoke into the measuring chamber the detector may only respond after a certain delay.
- the invention should now also the penetration behavior of smoke in the measuring chamber can be significantly improved.
- Smoke detector solved that the arrangement of light source and light receiver is selected so that the optical axes of the transmitter and the receiver Beam path spanned plane runs obliquely to the horizontal plane.
- the axis of the beam path on the receiver side preferably runs vertically to that of the beam path on the transmitter side.
- the labyrinth can be dispensed with almost completely, so that practically unimpeded smoke entry into the measuring chamber is made possible.
- the optics module 1 shown in Fig. 1 is part of a detector insert 2, which in one preferably mounted on the ceiling of the room to be monitored (not shown) can be fastened.
- the optics module 1 consists essentially of an optoelectronic Measuring chamber 3 with a light emitting diode (LED) Light source 4, a light receiver 5 also formed by a diode, a central one Aperture 6 and a so-called labyrinth 7.
- the central aperture 6 prevents that light rays go directly from the light source 4 to the light receiver 5 can, and the labyrinth 7 serves as a light barrier to limit the field of view of the light receiver 5.
- the measuring chamber 3 is through a side wall 8 and completed a cover, not shown, light-tight. This detector structure is known and will not be described here. It is in this context on the EP-A-0 772 170 and to the international application PCT / CH 97/00269.
- the optical axes of the light source 4 and the light receiver 5 are not on a common straight line, but have a bent course, the central aperture 6 is arranged close to the intersection of these two axes.
- the Labyrinth 7 suppresses the so-called background light, which is undesirable Scatter or reflection is caused. The better suppresses this background light the lower the base pulse, that is the signal that is detected when in there are no light-scattering particles in the measuring chamber 3.
- the cutting area of the radiation beam emitted by the light source 4 and the field of view of the Light receiver 5 forms the actual one, hereinafter referred to as the scattering space Measuring range.
- the light source 4 sends short, intense light pulses into the scattering space, the light receiver 5 indeed the scattering space, but not the light source 4
- the light from the light source 4 is scattered by smoke penetrating into the scattering space, and part of this scattered light falls on the light receiver 5.
- the receiver signal generated in this way is processed by evaluation electronics (FIG. 2).
- the diode used as the light source 4 transmits infrared radiation instead of the previously customary one with a wavelength of about 880 nm red or blue light of one wavelength from about 660 nm or 460 nm.
- These shorter wavelengths have the advantage that smaller aerosols, such as those that arise especially with open fires, do a lot can be detected better, so that compared to infrared radiation, the response behavior significantly improved on open fires.
- a polarization filter is arranged in front of the light receiver 5, which only contains the polarization component perpendicular to the scattering plane (this is the plane in which the optical axes of light source 4 and light receiver 5) passes, or if the measuring chamber 3 is exposed to polarized light.
- polarizing filters and polarized light is applied to CH-A-682 428 referred.
- the light source (LED) 4 is preceded by a first modulator 9 a suitable modulation of the radiation emitted by the light source 4 takes place.
- This radiation preferably consists of a continuous sequence of pulses and Pulse pauses, so that the measuring chamber 3 (Fig. 1) with a pulsating red or blue Light is applied. It can also be useful to follow a certain sequence Number of pulses and pulse pauses to insert a longer, predetermined transmission pause.
- the measuring chamber is irradiated by intermittently emitted and pulse trains or pulse packets interrupted by pauses in transmission. You can the transmission breaks to the pulse trains in a fixed or in a variable time Relationship.
- the first modulator 9 is controlled by a control stage 10, which receives its clock from a clock 11.
- the control stage 10 determines in particular the chronological sequence and the length of the output to the light source 4 Signals.
- the scattered light reaching the light receiver 7 is converted into a proportional current (receiver signal) I e , which is fed to a current / voltage converter 12 connected downstream of the light receiver 5 and is converted into a voltage (received signal) U e by the latter.
- the converter 12 additionally acts as a type of filter in that it suppresses external light originating from natural or artificial lighting.
- a frequency filter 13 connected downstream of the current / voltage converter 12, undesired frequencies are filtered out of the received signal U e .
- the output of the frequency filter 13 is connected to a switch 14 controlled by the control stage 10 in time with the modulation of the light source 4.
- the switch 14 is controlled by the control stage 10 in such a way that the received signal U e is transmitted to one integrator, for example to the integrator 15, during the duration of the pulses and to the other integrator, for example to the integrator 15 ', during the pulse pauses. , is directed. During any pauses in transmission between the pulse trains or pulse packets, the switch 14 remains in a neutral position in which neither of the two integrators 15 or 15 'is acted upon by the received signal.
- the switch 14 is preferably formed by a controlled switch.
- the integrator 15 receives only the scattered light generated in the scattering space, including any remnants of the filtered interference signal from the time of the transmission pulses, and the integrator 15 'only receives any remnants of the filtered interference signal from the time of the pulse pauses, so that the scattered light can be obtained by simply forming the difference between the output signals of the two integrators 15 and 15 '. This difference formation takes place in a stage 16 connected downstream of the two integrators 15, 15 '. Its output signal is the scattered light which has largely been cleaned of interference and strikes the light receiver 5 and which forms the useful signal U n for the signal evaluation.
- the useful signal U n is supplied on the one hand to a comparator 18 and on the other hand to the one input of a second modulator 19, the second input of which is connected to the control stage 10 and the output of which is led via a resistor 20 to the input of the current / voltage converter 12.
- This control loop can be compared to a self-balancing bridge circuit. If properly constructed, this circuit allows the resolution of photo currents down to the picoampere range.
- the comparator 18 compares the useful signal U n with at least one threshold value and delivers a corresponding signal to an alarm output 21 when it is exceeded
- the signal at alarm output 21 can be further evaluated, for example for plausibility it is checked what can be done in the detector or in the associated control center, or it is sent to the head office without further processing, where the corresponding one is then sent Condition registered and alarm triggered if necessary.
- the signal at the alarm output 21 can additionally or alternatively a light emitting diode arranged in the detector activate.
- a measuring channel it is also possible instead of a measuring channel to provide two measuring channels, one of which has a conventional structure, for example is and an infrared transmitter diode 4 and a receive diode 5 and the other one contains colored LED and / or a polarization filter 22.
- the polarization filter 22 can also be arranged between transmitter diode 4 and measuring chamber 3.
- the scattered light detector shown in Figures 3 and 4 differs from that shown in Fig. 1 essentially in that the optical axes of the transmitter and receiver beam path are not in a common horizontal but in a plane inclined to the horizontal plane, so that the light receiver 5 not in the horizontal direction but diagonally from top to bottom or vice versa looks ".
- the optical axis of the beam path on the receiver side runs vertically from top to bottom, but it could also run in the opposite direction and their angle of inclination to the optical axis of the beam path could also be be smaller or larger than 90 °. It is essential that the optical axis of the receiver Ray goose is oriented so that the recipient's field of vision is not through one component that inhibits the entry of smoke into the measuring chamber must be limited.
- the detector insert 2 has essentially the shape of a flat, open at the top round box, in the interior of a circuit board (not shown) with the evaluation electronics is arranged.
- a detector hood 23 is put over the detector insert 2, which is provided with smoke entry slots 24.
- a housing 25 At the bottom of the bottom of the Detector insert 2 are a housing 25 with the light transmitter 4 and holding means 26 for the one denoted by reference numeral 27 and closing the measuring chamber 3 at the bottom Cover provided.
- the cover 27 carries an upwardly projecting against the bottom of the detector insert 2 Light barrier 28.
- the measuring chamber is between the light source 4 and the light barrier 28 3 formed.
- the side wall 8 of the lid 27 is largely except for the light barrier 28 open, which ensures that smoke can enter the measuring chamber as freely as possible 3 is guaranteed.
- the axis of the beam cone emitted by the light source 4 runs across the Measuring room 3 in a horizontal plane parallel to the bottom of the detector insert 2.
- the Light barrier 28 prevents the light emitted by the light source 4 from the Detector can penetrate to the side.
- the light receiver 5 is in the middle of the floor the detector insert 2 arranged, and is shown just above of this.
- the bottom of the detector insert 2 points below the light receiver 5 and in alignment with this an opening which is against the measuring space 13 of is surrounded by an annular diaphragm 30 and into which a lens 31 is preferably inserted is.
- the light receiver 5, the aperture 30 and possibly the lens 31 define the optical axis of the beam path on the receiver side, which runs in the vertical direction and perpendicularly crosses the horizontal optical axis on the transmitter side.
- the light receiver 5 thus looks, as it were, from above onto the beam of rays emitted by the light source 4.
- the scattering space forming the actual measuring range in the cutting area of the transmitter and of the receiver-side beam is designated by the reference numeral 32.
- the field of view of the light receiver 5 is through the bottom of the lid 27 and through the detector hood 23 limits and direct irradiation of the light receiver 5 with External light is prevented by the aperture 30.
- the side wall 27 loses their previous functions and can be omitted, reducing the penetration behavior of smoke and aerosols in the measuring chamber 3 is markedly improved.
- the above a short area of the side wall of the cover 27 still existing and from the Functionally not necessarily necessary light barrier 28 has the penetration behavior practically no influence from smoke.
Abstract
Description
- Fig. 1
- eine vereinfachte Ansicht des Optikmoduls eines ersten Ausführungsbeispiels eines erfindungsgemässen Streulichtmelder,
- Fig. 2
- ein Blockschaltbild eines Ausführungsbeispiels der Auswerteschaltung des Streulichtmelders von Fig. 1,
- Fig. 3
- eine schematische Darstellung eines zweiten Ausführungsbeispiels eines erfindungsgemässen Streulichtmelders,
- Fig. 4
- einen Querschnitt durch ein dritten Ausführungsbeispiel eines erfindungsgemässen Streulichtrauchmelder im Niveau der optischen Achse der Lichtquelle mit Blickrichtung gegen den Meldersockel; und
- Fig. 5
- einen schematischen Schnitt nach der Linie V-V von Fig. 4.
Claims (10)
- Optischer Rauchmelder mit einem Meldereinsatz (2), einem Optikmodul (1) und einer Auswerteschaltung, wobei das Optikmodul (1) eine Lichtquelle (4, 4'), eine Messkammer (3) und einen mit der Auswerteschaltung verbundenen Lichtempfänger (5, 5') aufweist, dadurch gekennzeichnet, dass die Lichtquelle (4) zur Aussendung einer Strahlung im Wellenlängenbereich des sichtbaren Lichts ausgebildet ist.
- Rauchmelder nach Anspruch 1, dadurch gekennzeichnet, dass die Wellenlänge der von der Lichtquelle (4) ausgesandten Strahlung im Bereich von blauem oder rotem Licht liegt und vorzugsweise 460 nm beziehungsweise 660 nm beträgt.
- Rauchmelder nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Optikmodul (1) so ausgebildet ist, dass das vom Lichtempfänger (5') an die Auswerteschaltung abgegebene Signal eine Funktion des auf diesen auftreffenden, in einer Ebene polarisierten Streulichts ist.
- Rauchmelder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zwei Messkanäle mit entweder einem Lichtsender (4) und zwei Lichtempfängern (5, 5', 5'') oder zwei Lichtsendern (4) und einem Lichtempfänger (5) vorgesehen sind, wobei in einem der Messkanäle ein Polarisationsfilter (22) angeordnet ist.
- Rauchmelder nach Anspruch 4, dadurch gekennzeichnet, dass bei einer Anordnung mit zwei Lichtsendern (4) und einem Lichtempfänger (5) einer der Lichtsender (4) durch eine farbiges Licht aussendende Diode gebildet ist.
- Rauchmelder nach Anspruch 4, dadurch gekennzeichnet, dass bei einer Anordnung mit zwei Lichtempfängern (5, 5', 5'') einer der Lichtempfänger (5'') mit Rückwärts-Streulicht beaufschlagt ist.
- Rauchmelder nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass in der Auswerteschaltung eine Überlagerung des Signals (Ie) des Lichtempfängers (5, 5') mit einem Kompensationssignal (Ik) erfolgt, welches so gewählt ist, dass das Signal des Lichtempfängers (5, 5') auf den Wert null ausgeregelt wird.
- Rauchmelder nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Anordnung von Lichtquelle (4, 4') und Lichtempfänger (5, 5') so gewählt ist, dass die von den optischen Achsen des sender- und des empfängerseitigen Strahlengangs aufgespannte Ebene schräg zur Horizontalebene verläuft.
- Rauchmelder nach Anspruch 8, dadurch gekennzeichnet, dass die Achse des empfängerseitigen Strahlengangs vertikal zu derjenigen des senderseitigen Strahlengangs verläuft.
- Rauchmelder nach Anspruch 9, dadurch gekennzeichnet, dass der Meldereinsatz (2) an seinem Boden ein Gehäuse (25) mit der Lichtquelle (4) und Haltemittel (26) für einen die Messkammer (3) nach unten begrenzenden Deckel (27) mit einer weitgehend offenen Seitenwand (8) aufweist, und dass der Lichtempfänger (5) im Bereich des Bodens des Meldereinsatzes (2) angeordnet ist.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59711621T DE59711621D1 (de) | 1997-12-24 | 1997-12-24 | Optischer Rauchmelder |
AT97122894T ATE284603T1 (de) | 1997-12-24 | 1997-12-24 | Optischer rauchmelder |
EP97122894A EP0926646B8 (de) | 1997-12-24 | 1997-12-24 | Optischer Rauchmelder |
PT97122894T PT926646E (pt) | 1997-12-24 | 1997-12-24 | Detector optico de fumo |
ES97122894T ES2221946T3 (es) | 1997-12-24 | 1997-12-24 | Detector de humo optico. |
DK97122894T DK0926646T3 (da) | 1997-12-24 | 1997-12-24 | Optisk rögdetektor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97122894A EP0926646B8 (de) | 1997-12-24 | 1997-12-24 | Optischer Rauchmelder |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0926646A1 true EP0926646A1 (de) | 1999-06-30 |
EP0926646B1 EP0926646B1 (de) | 2004-05-12 |
EP0926646B8 EP0926646B8 (de) | 2004-09-22 |
Family
ID=8227883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97122894A Expired - Lifetime EP0926646B8 (de) | 1997-12-24 | 1997-12-24 | Optischer Rauchmelder |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0926646B8 (de) |
AT (1) | ATE284603T1 (de) |
DE (1) | DE59711621D1 (de) |
DK (1) | DK0926646T3 (de) |
ES (1) | ES2221946T3 (de) |
PT (1) | PT926646E (de) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1087352A1 (de) * | 1999-09-22 | 2001-03-28 | Siemens Building Technologies AG | Optischer Rauchmelder |
EP1103937A1 (de) * | 1999-11-19 | 2001-05-30 | Siemens Building Technologies AG | Brandmelder |
WO2001050432A1 (en) * | 1999-12-31 | 2001-07-12 | Digital Security Controls, Ltd. | Photoelectric smoke detector and chamber therefor |
EP1701161A2 (de) | 2005-03-08 | 2006-09-13 | Robert Bosch Gmbh | Gassensor |
EP1732049A1 (de) | 2005-06-10 | 2006-12-13 | Siemens S.A.S. | Brand- oder Rauchmelder mit erhöhter Fehlalarmunterdrükungsleistung |
US7365846B2 (en) | 2002-06-20 | 2008-04-29 | Siemens Aktiengesellschaft | Scattered light smoke detector |
US7463159B2 (en) | 2002-06-20 | 2008-12-09 | Siemens Building Technologies Ag | Fire detector |
DE19902319B4 (de) * | 1999-01-21 | 2011-06-30 | Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 | Streulichtbrandmelder |
DE102015117361A1 (de) | 2014-10-13 | 2016-04-14 | Universität Duisburg-Essen | Vorrichtung zur Identifikation von Aerosolen |
EP3029647A1 (de) * | 2014-12-04 | 2016-06-08 | Siemens Schweiz AG | Offener Streulichtrauchmelder, insbesondere mit einer Sidelooker-LED |
WO2018089660A1 (en) * | 2016-11-11 | 2018-05-17 | Carrier Corporation | High sensitivity fiber optic based detection |
WO2020064935A1 (de) | 2018-09-28 | 2020-04-02 | Siemens Schweiz Ag | Streulichtrauchmelder mit einer zweifarben-led, einem photosensor und einem dem photosensor vorgeschalteten oder der zweifarben-led nachgeschalteten wellenlängenselektiven polarisator sowie geeignete verwendung eines solchen polarisators |
CN111795951A (zh) * | 2020-05-28 | 2020-10-20 | 南京颗粒光电科技有限公司 | 一种新能源电池热失控检测用一体化传感器及预警方法 |
US10957176B2 (en) | 2016-11-11 | 2021-03-23 | Carrier Corporation | High sensitivity fiber optic based detection |
US11127270B2 (en) | 2016-11-11 | 2021-09-21 | Carrier Corporation | High sensitivity fiber optic based detection |
US11132883B2 (en) | 2016-11-11 | 2021-09-28 | Carrier Corporation | High sensitivity fiber optic based detection |
US11145177B2 (en) | 2016-11-11 | 2021-10-12 | Carrier Corporation | High sensitivity fiber optic based detection |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0031096A1 (de) * | 1979-12-20 | 1981-07-01 | Heimann GmbH | Optische Anordnung für einen Rauchmelder nach dem Lichtstreuungsprinzip |
EP0530723A1 (de) * | 1991-09-06 | 1993-03-10 | Cerberus Ag | Optischer Rauchmelder mit aktiver Überwachung |
CH682428A5 (de) * | 1991-09-13 | 1993-09-15 | Cerberus Ag | Optischer Rauchmelder. |
-
1997
- 1997-12-24 EP EP97122894A patent/EP0926646B8/de not_active Expired - Lifetime
- 1997-12-24 ES ES97122894T patent/ES2221946T3/es not_active Expired - Lifetime
- 1997-12-24 DE DE59711621T patent/DE59711621D1/de not_active Expired - Lifetime
- 1997-12-24 DK DK97122894T patent/DK0926646T3/da active
- 1997-12-24 AT AT97122894T patent/ATE284603T1/de active
- 1997-12-24 PT PT97122894T patent/PT926646E/pt unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0031096A1 (de) * | 1979-12-20 | 1981-07-01 | Heimann GmbH | Optische Anordnung für einen Rauchmelder nach dem Lichtstreuungsprinzip |
EP0530723A1 (de) * | 1991-09-06 | 1993-03-10 | Cerberus Ag | Optischer Rauchmelder mit aktiver Überwachung |
CH682428A5 (de) * | 1991-09-13 | 1993-09-15 | Cerberus Ag | Optischer Rauchmelder. |
Non-Patent Citations (1)
Title |
---|
D. S. GOODMAN: "METHOD FOR LOCALIZING LIGHT SCATTERED PARTICLES", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 27, no. 5, October 1984 (1984-10-01), pages 3164, XP002066860 * |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19902319B4 (de) * | 1999-01-21 | 2011-06-30 | Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 | Streulichtbrandmelder |
EP1087352A1 (de) * | 1999-09-22 | 2001-03-28 | Siemens Building Technologies AG | Optischer Rauchmelder |
EP1103937A1 (de) * | 1999-11-19 | 2001-05-30 | Siemens Building Technologies AG | Brandmelder |
CZ301163B6 (cs) * | 1999-11-19 | 2009-11-25 | Siemens Aktiengesellschaft | Hlásic požáru |
WO2001050432A1 (en) * | 1999-12-31 | 2001-07-12 | Digital Security Controls, Ltd. | Photoelectric smoke detector and chamber therefor |
AU775466B2 (en) * | 1999-12-31 | 2004-08-05 | Tyco Safety Products Canada Ltd | Photoelectric smoke detector and chamber therefor |
US7463159B2 (en) | 2002-06-20 | 2008-12-09 | Siemens Building Technologies Ag | Fire detector |
US7365846B2 (en) | 2002-06-20 | 2008-04-29 | Siemens Aktiengesellschaft | Scattered light smoke detector |
EP1701161A3 (de) * | 2005-03-08 | 2007-04-25 | Robert Bosch Gmbh | Gassensor |
US7791056B2 (en) | 2005-03-08 | 2010-09-07 | Robert Bosch Gmbh | Gas sensor for use as a fire detector |
EP1701161A2 (de) | 2005-03-08 | 2006-09-13 | Robert Bosch Gmbh | Gassensor |
US7760102B2 (en) | 2005-06-10 | 2010-07-20 | Siemens Ag | Fire or smoke detector with high false alarm rejection performance |
EP1732049A1 (de) | 2005-06-10 | 2006-12-13 | Siemens S.A.S. | Brand- oder Rauchmelder mit erhöhter Fehlalarmunterdrükungsleistung |
EP3096130A2 (de) | 2014-10-13 | 2016-11-23 | Universität Duisburg-Essen | Vorrichtung zur identifikation von aerosolen |
DE102015117361A1 (de) | 2014-10-13 | 2016-04-14 | Universität Duisburg-Essen | Vorrichtung zur Identifikation von Aerosolen |
EP3029647B1 (de) | 2014-12-04 | 2017-05-31 | Siemens Schweiz AG | Offener Streulichtrauchmelder, insbesondere mit einer Sidelooker-LED |
US9666048B2 (en) | 2014-12-04 | 2017-05-30 | Siemens Schweiz Ag | Scattered light smoke detector of the open type, in particular having a sidelooker led |
EP3029647A1 (de) * | 2014-12-04 | 2016-06-08 | Siemens Schweiz AG | Offener Streulichtrauchmelder, insbesondere mit einer Sidelooker-LED |
WO2018089660A1 (en) * | 2016-11-11 | 2018-05-17 | Carrier Corporation | High sensitivity fiber optic based detection |
US10957176B2 (en) | 2016-11-11 | 2021-03-23 | Carrier Corporation | High sensitivity fiber optic based detection |
US11127270B2 (en) | 2016-11-11 | 2021-09-21 | Carrier Corporation | High sensitivity fiber optic based detection |
US11132883B2 (en) | 2016-11-11 | 2021-09-28 | Carrier Corporation | High sensitivity fiber optic based detection |
US11145177B2 (en) | 2016-11-11 | 2021-10-12 | Carrier Corporation | High sensitivity fiber optic based detection |
US11151853B2 (en) | 2016-11-11 | 2021-10-19 | Carrier Corporation | High sensitivity fiber optic based detection |
WO2020064935A1 (de) | 2018-09-28 | 2020-04-02 | Siemens Schweiz Ag | Streulichtrauchmelder mit einer zweifarben-led, einem photosensor und einem dem photosensor vorgeschalteten oder der zweifarben-led nachgeschalteten wellenlängenselektiven polarisator sowie geeignete verwendung eines solchen polarisators |
US11506590B2 (en) | 2018-09-28 | 2022-11-22 | Siemens Schweiz Ag | Scattered light smoke detector having a two-color LED, a photosensor, and a wavelength-selective polarizer connected upstream of the photosensor or connected downstream of the two-color LED, and suitable use of such a polarizer |
CN111795951A (zh) * | 2020-05-28 | 2020-10-20 | 南京颗粒光电科技有限公司 | 一种新能源电池热失控检测用一体化传感器及预警方法 |
Also Published As
Publication number | Publication date |
---|---|
ATE284603T1 (de) | 2004-05-15 |
ES2221946T3 (es) | 2005-01-16 |
PT926646E (pt) | 2004-10-29 |
EP0926646B8 (de) | 2004-09-22 |
DE59711621D1 (de) | 2004-06-17 |
DK0926646T3 (da) | 2004-09-20 |
EP0926646B1 (de) | 2004-05-12 |
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