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1. WO1997027571 - METHOD FOR DYNAMICALLY ADJUSTING FIRE DETECTION CRITERIA

Publication Number WO/1997/027571
Publication Date 31.07.1997
International Application No. PCT/US1997/001264
International Filing Date 28.01.1997
Chapter 2 Demand Filed 26.08.1997
IPC
G08B 17/10 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases
G08B 17/117 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases
117by using a detection device for specific gases, e.g. combustion products, produced by the fire
G08B 29/18 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
G08B 29/20 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
20Calibration, including self-calibrating arrangements
G08B 29/26 2006.01
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
20Calibration, including self-calibrating arrangements
24Self-calibration, e.g. compensating for environmental drift or ageing of components
26by updating and storing reference thresholds
CPC
G08B 17/10
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases ; automatic alarm devices for analysing flowing fluid materials by the use of optical means
G08B 17/113
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases ; automatic alarm devices for analysing flowing fluid materials by the use of optical means
11using an ionisation chamber for detecting smoke or gas
113Constructional details
G08B 17/117
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17Fire alarms; Alarms responsive to explosion
10Actuation by presence of smoke or gases ; automatic alarm devices for analysing flowing fluid materials by the use of optical means
117by using a detection device for specific gases, e.g. combustion products, produced by the fire
G08B 29/183
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
183Single detectors using dual technologies
G08B 29/26
GPHYSICS
08SIGNALLING
BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
29Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
18Prevention or correction of operating errors
20Calibration, including self-calibrating arrangements
24Self-calibration, e.g. compensating for environmental drift or ageing of components
26by updating and storing reference thresholds
Applicants
  • ENGELHARD SENSOR TECHNOLOGIES, INC. [US]/[US] (AllExceptUS)
  • WONG, Jacob, Y. [US]/[US] (UsOnly)
Inventors
  • WONG, Jacob, Y.
Agents
  • SIEGEL, Timothy, E.
Priority Data
08/593,25329.01.1996US
08/593,75029.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR DYNAMICALLY ADJUSTING FIRE DETECTION CRITERIA
(FR) PROCEDE D'ADAPTATION DYNAMIQUE DES CRITERES DE DETECTION D'INCENDIE
Abstract
(EN)
A fire detector that combines a CO2 gas detector with a photoelectric smoke detector to minimize false alarms by logic means that can be integrated into a single chip that can have an ASIC section and a microprocessor section is disclosed. The CO2 gas detector can be single or dual channel. The CO2 gas detector and the photoelectric smoke detector can be separated or combined in a single device that uses a common light source. Also, the CO2 gas detector and photoelectric smoke detector can be combined on a single substrate within a common housing. The smoke based fire detection criteria of the fire detector is dynamically adjusted in response to the measurements formed by the CO2 gas detector.
(FR)
La présente invention concerne un détecteur d'incendie associant un détecteur de gaz (CO2) à un détecteur de fumée à cellule photoélectrique de façon à ramener à un minimum les fausses alarmes produites par la logique qui s'intègre dans un seul microcircuit pouvant être constitué d'un circuit spécialisé et d'un microprocesseur. Le détecteur de gaz peut être monocanal ou bicanal. Le détecteur de gaz (CO2) et le détecteur de fumée à cellule photoélectrique peuvent être distinct ou rassemblés en un seul dispositif utilisant une source lumineuse commune. En outre, le détecteur de gaz (CO2) et le détecteur de fumée à cellule photoélectrique peuvent être combinés sur un seul substrat à l'intérieur d'un boîtier commun. Les critères de détection d'incendie par la fumée du détecteur d'incendie subissent une adaptation dynamique en réaction aux mesures produites par le détecteur de gaz (CO2).
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