DE3023784C2 - Fotoelektrischer Detektor - Google Patents

Fotoelektrischer Detektor

Info

Publication number
DE3023784C2
DE3023784C2 DE3023784A DE3023784A DE3023784C2 DE 3023784 C2 DE3023784 C2 DE 3023784C2 DE 3023784 A DE3023784 A DE 3023784A DE 3023784 A DE3023784 A DE 3023784A DE 3023784 C2 DE3023784 C2 DE 3023784C2
Authority
DE
Germany
Prior art keywords
circuit
light
power supply
intermittent
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.)
Expired
Application number
DE3023784A
Other languages
German (de)
English (en)
Other versions
DE3023784A1 (de
Inventor
Hiroshi Hino Tokyo Honma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hochiki Corp
Original Assignee
Hochiki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP8009579A external-priority patent/JPS5932838B2/ja
Priority claimed from JP8344679A external-priority patent/JPS5832439B2/ja
Application filed by Hochiki Corp filed Critical Hochiki Corp
Publication of DE3023784A1 publication Critical patent/DE3023784A1/de
Application granted granted Critical
Publication of DE3023784C2 publication Critical patent/DE3023784C2/de
Expired legal-status Critical Current

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Communication System (AREA)
DE3023784A 1979-06-27 1980-06-25 Fotoelektrischer Detektor Expired DE3023784C2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8009579A JPS5932838B2 (ja) 1979-06-27 1979-06-27 光電式検出器
JP8344679A JPS5832439B2 (ja) 1979-07-03 1979-07-03 減光式分離型火災感知器

Publications (2)

Publication Number Publication Date
DE3023784A1 DE3023784A1 (de) 1981-01-22
DE3023784C2 true DE3023784C2 (de) 1983-09-29

Family

ID=26421141

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3023784A Expired DE3023784C2 (de) 1979-06-27 1980-06-25 Fotoelektrischer Detektor

Country Status (7)

Country Link
US (1) US4333724A (enExample)
AT (1) AT384903B (enExample)
AU (1) AU533232B2 (enExample)
CH (1) CH637779A5 (enExample)
DE (1) DE3023784C2 (enExample)
FR (1) FR2460012A1 (enExample)
GB (1) GB2057121B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604603A1 (de) * 1985-02-23 1986-09-04 Hitachi, Ltd., Tokio/Tokyo Optischer schaltkreis

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640621A (en) * 1983-06-17 1987-02-03 Eastern Technical Associates, Inc. Transmissometer and optical elements therefor
HU195589B (en) * 1986-09-15 1988-05-30 Peter Hakkel Portable optical system for protecting field
US4914720A (en) * 1986-12-04 1990-04-03 Cascadia Technology Corporation Gas analyzers
US4859858A (en) * 1986-12-04 1989-08-22 Cascadia Technology Corporation Gas analyzers
DE3715507A1 (de) * 1987-05-09 1988-11-17 Berufsgenossenschaft Nahrungsm Verfahren und vorrichtung zur messung von staubkonzentrationen in gasen oder festpartikelkonzentrationen in fluessigkeiten
GB9905155D0 (en) * 1999-03-06 1999-04-28 Mayer David Signalling device
DE19940280C2 (de) 1999-08-26 2001-11-15 Draeger Safety Ag & Co Kgaa Gassensor mit offener optischer Meßstrecke
US7017408B2 (en) * 2004-02-13 2006-03-28 Be Intellectual Property, Inc. Electro-optic liquid level sensing system for aircraft beverage brewing
US8102259B2 (en) 2006-10-17 2012-01-24 Honeywell International Inc. Fluorescent light immunity through synchronous sampling
US10786948B2 (en) 2014-11-18 2020-09-29 Sigma Labs, Inc. Multi-sensor quality inference and control for additive manufacturing processes
US10207489B2 (en) * 2015-09-30 2019-02-19 Sigma Labs, Inc. Systems and methods for additive manufacturing operations

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1082973A (en) * 1964-04-02 1967-09-13 Int Research & Dev Co Ltd Electrical interrupted-beam alarm systems
CH417405A (de) * 1964-07-14 1966-07-15 Cerberus Ag Werk Fuer Elektron Vorrichtung zur Feststellung von Aerosolen in Luft
CH424968A (de) * 1965-08-04 1966-11-30 Zellweger Uster Ag Verfahren und Vorrichtung zur Steuerung von elektrischen Apparaten mit Hilfe von insbesondere tonfrequenten Impulsen, die dem Starkstromnetz überlagert werden
DE2059656A1 (de) * 1970-12-04 1972-06-29 Alfons Endl Lichtschranke mit einer Schaltung zum Konstanthalten der Schaltwelle
US3846772A (en) * 1972-08-11 1974-11-05 Chubb Fire Security Ltd Fire detector responsive to amplitude modulation of a pulsed em beam
US3889118A (en) * 1973-06-14 1975-06-10 Rockwell International Corp Electronic presence sensing device
US3973852A (en) * 1974-08-30 1976-08-10 The Dow Chemical Company Method and apparatus for measuring particulate concentration in the atmosphere
US3995960A (en) * 1975-07-25 1976-12-07 Nasa Method and apparatus for background signal reduction in opto-acoustic absorption measurement
US4065759A (en) * 1976-01-07 1977-12-27 Handing Theodore E Smoke detector
US4126790A (en) * 1976-09-20 1978-11-21 Solomon Elias E Strobed smoke detector
US4200399A (en) * 1978-11-20 1980-04-29 General Motors Corporation Resonant optoacoustic spectroscopy apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604603A1 (de) * 1985-02-23 1986-09-04 Hitachi, Ltd., Tokio/Tokyo Optischer schaltkreis

Also Published As

Publication number Publication date
FR2460012A1 (fr) 1981-01-16
ATA336280A (de) 1987-06-15
FR2460012B1 (enExample) 1983-12-16
DE3023784A1 (de) 1981-01-22
CH637779A5 (fr) 1983-08-15
GB2057121A (en) 1981-03-25
AU5941280A (en) 1981-01-08
AU533232B2 (en) 1983-11-10
AT384903B (de) 1988-01-25
US4333724A (en) 1982-06-08
GB2057121B (en) 1983-04-27

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8128 New person/name/address of the agent

Representative=s name: LUEKE, D., DIPL.-ING., PAT.-ANW., 1000 BERLIN

8126 Change of the secondary classification

Free format text: H03K 17/78 G08B 13/18

D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8380 Miscellaneous part iii

Free format text: ES ERFOLGT NEUDRUCK DER PATENTSCHRIFT NACH AUFRECHTERHALTUNG