SE7711904L - DETECTOR SIGNAL PROCESSING CIRCUIT AT A PHOTOELECTRIC SMOKE DETECTOR - Google Patents
DETECTOR SIGNAL PROCESSING CIRCUIT AT A PHOTOELECTRIC SMOKE DETECTORInfo
- Publication number
- SE7711904L SE7711904L SE7711904A SE7711904A SE7711904L SE 7711904 L SE7711904 L SE 7711904L SE 7711904 A SE7711904 A SE 7711904A SE 7711904 A SE7711904 A SE 7711904A SE 7711904 L SE7711904 L SE 7711904L
- Authority
- SE
- Sweden
- Prior art keywords
- detector
- signal processing
- processing circuit
- photoelectric smoke
- smoke detector
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
-
- 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
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)
- Burglar Alarm Systems (AREA)
- Fire Alarms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:The reliability of operation of smoke detectors is enhanced by detecting only the signal by the smoke at the fire without responding to external noises.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12893876A JPS5354000A (en) | 1976-10-26 | 1976-10-26 | Detection signal processing circuit of photoelectric type smoke detectors |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7711904L true SE7711904L (en) | 1978-04-27 |
SE432161B SE432161B (en) | 1984-03-19 |
Family
ID=14997107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7711904A SE432161B (en) | 1976-10-26 | 1977-10-21 | PHOTOELECTRIC ROCK DETECTION DEVICE |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5354000A (en) |
DE (1) | DE2747692B2 (en) |
FR (1) | FR2369746A1 (en) |
SE (1) | SE432161B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5544690A (en) * | 1978-09-26 | 1980-03-29 | Matsushita Electric Works Ltd | Signal processing circuit |
GB2044504B (en) * | 1979-03-17 | 1983-04-20 | Hochiki Co | Count discriminating fire detector |
EP0971329B1 (en) * | 1998-07-10 | 2003-03-05 | Siemens Building Technologies AG | Device for testing smoke detectors of the light diffusion type |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5247700B2 (en) * | 1972-03-06 | 1977-12-05 | ||
US3946241A (en) * | 1973-11-26 | 1976-03-23 | Pyrotector, Incorporated | Light detector with pulsed light source and synchronous data gating |
US3917956A (en) * | 1974-03-08 | 1975-11-04 | Pyrotector Inc | Smoke detector |
IL45331A (en) * | 1973-11-26 | 1977-12-30 | Chloride Batterijen Bv | Photoelectric smoke detector |
JPS518983A (en) * | 1974-07-11 | 1976-01-24 | Omron Tateisi Electronics Co | FUNIKIKENCHISOCHI |
CH576175A5 (en) * | 1974-12-19 | 1976-05-31 | Cerberus Ag |
-
1976
- 1976-10-26 JP JP12893876A patent/JPS5354000A/en active Granted
-
1977
- 1977-10-21 SE SE7711904A patent/SE432161B/en not_active IP Right Cessation
- 1977-10-25 FR FR7732152A patent/FR2369746A1/en active Granted
- 1977-10-25 DE DE19772747692 patent/DE2747692B2/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE2747692B2 (en) | 1980-02-28 |
SE432161B (en) | 1984-03-19 |
FR2369746A1 (en) | 1978-05-26 |
DE2747692A1 (en) | 1978-04-27 |
FR2369746B1 (en) | 1982-11-05 |
JPS6130320B2 (en) | 1986-07-12 |
JPS5354000A (en) | 1978-05-16 |
DE2747692C3 (en) | 1988-09-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
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