DK0615218T3 - Method and device for compensating for the humidity of a diffuser light detector - Google Patents
Method and device for compensating for the humidity of a diffuser light detectorInfo
- Publication number
- DK0615218T3 DK0615218T3 DK94103217.9T DK94103217T DK0615218T3 DK 0615218 T3 DK0615218 T3 DK 0615218T3 DK 94103217 T DK94103217 T DK 94103217T DK 0615218 T3 DK0615218 T3 DK 0615218T3
- Authority
- DK
- Denmark
- Prior art keywords
- light
- receiver
- light transmitter
- humidity
- compensating
- Prior art date
Links
Classifications
-
- 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
- G08B17/103—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The compensating method involves using a second light transmitter(LS2) is provided, which with the existing light receiver(LE) detects a moisture coating on the receiver optic(EL). Whilst periodically the smoke density(MWR) is measured with t he first light transmitter(LS1), and at times alternates with the humidity(MWF) measured with the first light transmitter(LS2). The two measurement values are processed. The second light transmitter is arranged in the direct vicinity of the light receiver(LE) or its receiver optic(EL), such that the transmitted light brushes the receiver optic(EL) approximately tangentially, and the moisture coating(WT) reflects the light of the second light transmitter. So that the receiver output signal weakens, depending on the thickness of the moisture coating.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4307585A DE4307585C1 (en) | 1993-03-10 | 1993-03-10 | Compensating for air humidity in stray light signal unit for fire alarm system - contg. first light transmitter with associated optic and light receiver with associated optic with its output signal representing measured value of smoke density |
Publications (1)
Publication Number | Publication Date |
---|---|
DK0615218T3 true DK0615218T3 (en) | 1996-11-04 |
Family
ID=6482440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK94103217.9T DK0615218T3 (en) | 1993-03-10 | 1994-03-03 | Method and device for compensating for the humidity of a diffuser light detector |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0615218B1 (en) |
AT (1) | ATE142807T1 (en) |
DE (2) | DE4307585C1 (en) |
DK (1) | DK0615218T3 (en) |
ES (1) | ES2091645T3 (en) |
GR (1) | GR3021486T3 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5781291A (en) * | 1996-10-22 | 1998-07-14 | Pittway Corporation | Smoke detectors utilizing a hydrophilic substance |
DE19912911C2 (en) * | 1999-03-22 | 2001-07-19 | Schako Metallwarenfabrik | Device for detecting smoke |
DE102004020489B4 (en) * | 2004-04-26 | 2007-06-28 | Minimax Gmbh & Co. Kg | Fire detector for use in outdoor atmosphere |
DE102004023524B3 (en) | 2004-05-13 | 2005-09-15 | Job Lizenz Gmbh & Co. Kg | Smoke and mist detection device for activation of fire alarm and sprinkler system in building has chamber with grilles at ends containing support for photosensor and indirect illumination LED |
DE102004032294B4 (en) * | 2004-07-03 | 2012-02-09 | Minimax Gmbh & Co. Kg | Heated fire alarm |
EP3899501B1 (en) | 2020-02-05 | 2023-06-07 | Durag GmbH | Device for the scattered light measurement of particles in a gas |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH571750A5 (en) * | 1974-09-10 | 1976-01-15 | Nohmi Bosai Kogyo Co Ltd | Photoelectricccc aerosol or smoke detector - second photo cell receives reflected light from prism surface to compensate for contamination |
ES2061859T3 (en) * | 1989-09-19 | 1994-12-16 | Siemens Ag | PROCEDURE AND DEVICE FOR COMPENSATION OF AIR MOISTURE IN AN OPTICAL SMOKE ALARM. |
-
1993
- 1993-03-10 DE DE4307585A patent/DE4307585C1/en not_active Expired - Fee Related
-
1994
- 1994-03-03 AT AT94103217T patent/ATE142807T1/en not_active IP Right Cessation
- 1994-03-03 DK DK94103217.9T patent/DK0615218T3/en active
- 1994-03-03 EP EP94103217A patent/EP0615218B1/en not_active Expired - Lifetime
- 1994-03-03 ES ES94103217T patent/ES2091645T3/en not_active Expired - Lifetime
- 1994-03-03 DE DE59400613T patent/DE59400613D1/en not_active Expired - Fee Related
-
1996
- 1996-10-25 GR GR960402845T patent/GR3021486T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
GR3021486T3 (en) | 1997-01-31 |
DE4307585C1 (en) | 1994-03-10 |
ATE142807T1 (en) | 1996-09-15 |
DE59400613D1 (en) | 1996-10-17 |
ES2091645T3 (en) | 1996-11-01 |
EP0615218A1 (en) | 1994-09-14 |
EP0615218B1 (en) | 1996-09-11 |
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