EP1012805A1 - Rauchmelder - Google Patents
RauchmelderInfo
- Publication number
- EP1012805A1 EP1012805A1 EP98928058A EP98928058A EP1012805A1 EP 1012805 A1 EP1012805 A1 EP 1012805A1 EP 98928058 A EP98928058 A EP 98928058A EP 98928058 A EP98928058 A EP 98928058A EP 1012805 A1 EP1012805 A1 EP 1012805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiation
- smoke
- smoke detector
- detector according
- hollow ellipsoid
- 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
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 invention is based on the genus as stated in independent claim 1.
- Smoke detectors are generally used for early fire detection.
- One method of detecting smoke particles is to measure radiation scattered on smoke particles.
- Such smoke detectors based on the scattered radiation principle usually use the method of forward
- Such a smoke detector consists of a radiation transmitter (usually pulsed), a lens for bundling the beams and a radiation receiver, for example a photodiode, optionally with a lens for capturing the scattering cone of the scattered radiation.
- Radiation receivers and radiation transmitters have no direct line of sight, but are optically separated from one another by appropriate mechanical measures. There is an obtuse angle between the radiation emitting direction and the receiving direction, and the scattering angle at the smoke particles to be detected is also obtuse.
- the radiation transmitter and the radiation receiver are arranged next to one another, the scattering angle is acute (patent specification DE 38 31 654 C2).
- a disadvantage of the known methods is that only a small proportion of the scattered radiation falls on the radiation receiver, while the remaining scattered radiation is lost for the measurement. Furthermore, only one of the preferred measurement effects, forward and backward scattering, is used in each case.
- the invention makes it possible to supply almost all of the radiation scattered on the smoke particles to a radiation receiver as a measurement signal. This includes both the forward-scattered radiation, the back-scattered radiation, and the scattered radiation from all intermediate areas. This makes the measurement more sensitive overall, since there is almost no loss due to radiation that has not been captured.
- the smoke detector according to the invention also takes into account the scattering properties based on different particle diameters.
- a light-emitting diode, a semiconductor laser or a flash lamp can be provided as the radiation transmitter.
- Figure 4 is a schematic, perspective view of another embodiment according to the invention.
- Figure 1 shows the basic arrangement with a section through the focal points 1 and 2 of a hollow ellipsoid 3.
- the hollow ellipsoid 3 is mirrored on the inside and provided with openings 4 which are small in relation to the inner surface of the hollow ellipsoid 3, for example max. Make up 10% of the inner surface.
- the first focal point 1 and its immediate surroundings form the measuring field 5, where smoke particles can be irradiated at the same time by a radiation transmitter 6 and can be detected by a radiation receiver 7 in the focal point 2.
- a radiation collector, which is attached in the second focal point 2 belongs to the radiation receiver 7.
- the radiation receiver can also be used there instead be appropriate.
- a hemispherical lens can serve as the radiation collector for the half-shell of the hollow ellipsoid 3 lying below the drawing plane or above the drawing plane.
- the radiation receiver can consist of one or more photodiodes or an equivalent component.
- the photodiodes can be arranged such that one preferably receives the radiation from the backward scatter and the other preferably receives the radiation from the forward scatter, as indicated in FIG. 2, so that the area of the backward scattering is designated by the reception angle 8. This makes it possible to separately evaluate the scattered radiation received from the different scattering angles in a single evaluation unit and to draw conclusions about the type of fire that is typical of the respective particle size. Other meaningful evaluations of angular ranges are possible.
- the mirror formed by the hollow ellipsoid 3 can be provided with a number of openings 4, which enable the smoke particles to penetrate into the measuring field 5.
- the openings 4 are small in terms of surface area compared to the total surface, so that there is no significant loss in the proportion of the radiation reflected by the hollow ellipsoid 3.
- FIG. 3 shows, it is also possible to cut one tip or both tips at the ends of the longitudinal axis of the hollow ellipsoid 3 in order to allow smoke to enter through an opening 4a.
- FIG. 4 it is possible to use only a partial shell 9 of a hollow ellipsoid in order to allow free access of the smoke particles for measurement.
- This solution is characterized by a simple construction.
- a light trap 10 is arranged in the extension of the path from the radiation transmitter 6 to the measuring field 5.
- Holding elements 11 for the radiation receiver 7 are shown schematically.
- All of the exemplary embodiments described can, as is customary in the case of optical smoke detectors, be provided with a labyrinth in order to prevent the entry of extraneous light into the hollow ellipsoid 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19741853A DE19741853A1 (de) | 1997-09-23 | 1997-09-23 | Rauchmelder |
DE19741853 | 1997-09-23 | ||
PCT/DE1998/000857 WO1999016033A1 (de) | 1997-09-23 | 1998-03-24 | Rauchmelder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1012805A1 true EP1012805A1 (de) | 2000-06-28 |
EP1012805B1 EP1012805B1 (de) | 2002-06-19 |
Family
ID=7843273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98928058A Expired - Lifetime EP1012805B1 (de) | 1997-09-23 | 1998-03-24 | Rauchmelder |
Country Status (9)
Country | Link |
---|---|
US (1) | US6239710B1 (de) |
EP (1) | EP1012805B1 (de) |
JP (1) | JP2001517843A (de) |
CN (1) | CN1111829C (de) |
AT (1) | ATE219592T1 (de) |
AU (1) | AU8007498A (de) |
DE (2) | DE19741853A1 (de) |
ES (1) | ES2178839T3 (de) |
WO (1) | WO1999016033A1 (de) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19945856B4 (de) | 1999-09-24 | 2005-12-29 | Robert Bosch Gmbh | Sprinklervorrichtung mit einem Ventil für Löschflüssigkeit |
US6876305B2 (en) * | 1999-12-08 | 2005-04-05 | Gentex Corporation | Compact particle sensor |
DE10012705B4 (de) | 2000-03-08 | 2006-09-14 | Torsten Dipl.-Ing. Clauß | Verfahren und Vorrichtung zum Früherkennen und Bekämpfen von Feuer im Innen- und Außenbereich, insbesondere Wohnbereich, von Häusern und Gebäuden |
DE10060044C2 (de) * | 2000-12-02 | 2003-01-09 | Rubitec Gesellschaft Fuer Innovation & Technologie Ruhr Univ Bochum Mbh | Streulichtdetektor |
US7119899B2 (en) * | 2003-07-23 | 2006-10-10 | Lighthouse Worldwide Solutions, Inc | Particle sensor system |
DE102004001699A1 (de) * | 2004-01-13 | 2005-08-04 | Robert Bosch Gmbh | Brandmelder |
CN100394456C (zh) * | 2004-04-06 | 2008-06-11 | 诺瓦尔有限公司 | 火灾识别方法及实施该方法的火灾报警器 |
US7502110B2 (en) * | 2004-07-21 | 2009-03-10 | Lighthouse Worldwide Solutions, Inc | Design for particle sensor system |
US7847700B2 (en) * | 2007-07-03 | 2010-12-07 | Conforti Fred J | System and method for an optical particle detector |
US8941505B2 (en) * | 2008-10-09 | 2015-01-27 | Hochiki Corporation | Smoke detector |
GB2484930B (en) * | 2010-10-26 | 2017-04-26 | Uh Ventures Ltd | An improved low cost apparatus and method for the detection of a fluid-borne particle |
KR20120071453A (ko) * | 2010-12-23 | 2012-07-03 | 삼성전자주식회사 | 미생물 검출장치 |
DE102011108389A1 (de) | 2011-07-22 | 2013-01-24 | PPP "KB Pribor" Ltd. | Rauchdetektor |
DE102011108390B4 (de) | 2011-07-22 | 2019-07-11 | PPP "KB Pribor" Ltd. | Verfahren zur Herstellung eines Rauchdetektors vom offenen Typ |
FR2995640B1 (fr) * | 2012-09-19 | 2015-03-20 | Efs Sa | Dispositif de mesure d’une quantite de fluide injectee par un injecteur |
JP6438319B2 (ja) * | 2015-02-18 | 2018-12-12 | アズビル株式会社 | 粒子検出装置 |
JP6688966B2 (ja) | 2015-07-27 | 2020-04-28 | パナソニックIpマネジメント株式会社 | 粒子検出センサ |
EP3128493A1 (de) * | 2015-08-06 | 2017-02-08 | Siemens Schweiz AG | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
US10241043B2 (en) * | 2015-12-14 | 2019-03-26 | Mitsubishi Electric Corporation | Micro object detection apparatus |
KR102380173B1 (ko) * | 2017-04-14 | 2022-03-29 | 엘지이노텍 주식회사 | 입자 센싱 장치 |
CN112213245B (zh) * | 2020-11-26 | 2021-05-28 | 江西嘉德物联传感技术有限责任公司 | 一种基于物联网的烟雾感应报警设备 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2357888A1 (fr) * | 1976-04-01 | 1978-02-03 | Cerberus Ag | Detecteur de fumee |
CH660244A5 (de) * | 1983-01-11 | 1987-03-31 | Cerberus Ag | Photoelektrischer rauchdetektor und dessen verwendung. |
DE3483519D1 (de) * | 1983-12-24 | 1990-12-06 | Inotech Ag Wohlen | Vorrichtung zum fuehren und sammeln von licht in der fotometrie od. dgl. |
EP0175940B1 (de) * | 1984-08-23 | 1990-12-05 | Nohmi Bosai Kogyo Co., Ltd. | Photoelektrischer Rauchdetektor |
KR900700871A (ko) * | 1988-03-30 | 1990-08-17 | 마틴 테렌스 콜레 | 유체 오염 모니터 |
CH684556A5 (de) * | 1992-09-14 | 1994-10-14 | Cerberus Ag | Optischer Rauchmelder. |
-
1997
- 1997-09-23 DE DE19741853A patent/DE19741853A1/de not_active Withdrawn
-
1998
- 1998-03-24 JP JP2000513256A patent/JP2001517843A/ja active Pending
- 1998-03-24 CN CN98806808A patent/CN1111829C/zh not_active Expired - Fee Related
- 1998-03-24 ES ES98928058T patent/ES2178839T3/es not_active Expired - Lifetime
- 1998-03-24 EP EP98928058A patent/EP1012805B1/de not_active Expired - Lifetime
- 1998-03-24 AU AU80074/98A patent/AU8007498A/en not_active Abandoned
- 1998-03-24 AT AT98928058T patent/ATE219592T1/de not_active IP Right Cessation
- 1998-03-24 US US09/445,878 patent/US6239710B1/en not_active Expired - Lifetime
- 1998-03-24 WO PCT/DE1998/000857 patent/WO1999016033A1/de active IP Right Grant
- 1998-03-24 DE DE59804533T patent/DE59804533D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9916033A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2178839T3 (es) | 2003-01-01 |
US6239710B1 (en) | 2001-05-29 |
DE59804533D1 (de) | 2002-07-25 |
EP1012805B1 (de) | 2002-06-19 |
AU8007498A (en) | 1999-04-12 |
ATE219592T1 (de) | 2002-07-15 |
CN1111829C (zh) | 2003-06-18 |
DE19741853A1 (de) | 1999-03-25 |
WO1999016033A1 (de) | 1999-04-01 |
JP2001517843A (ja) | 2001-10-09 |
CN1261972A (zh) | 2000-08-02 |
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