SE432161B - PHOTOELECTRIC ROCK DETECTION DEVICE - Google Patents

PHOTOELECTRIC ROCK DETECTION DEVICE

Info

Publication number
SE432161B
SE432161B SE7711904A SE7711904A SE432161B SE 432161 B SE432161 B SE 432161B SE 7711904 A SE7711904 A SE 7711904A SE 7711904 A SE7711904 A SE 7711904A SE 432161 B SE432161 B SE 432161B
Authority
SE
Sweden
Prior art keywords
photoelectric
detection device
rock detection
rock
photoelectric rock
Prior art date
Application number
SE7711904A
Other languages
Swedish (sv)
Other versions
SE7711904L (en
Inventor
K Tatetsuki
T Hanahara
T Nakano
K Morisue
Original Assignee
Matsushita Electric Works Ltd
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
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of SE7711904L publication Critical patent/SE7711904L/en
Publication of SE432161B publication Critical patent/SE432161B/en

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)
SE7711904A 1976-10-26 1977-10-21 PHOTOELECTRIC ROCK DETECTION DEVICE SE432161B (en)

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 SE7711904L (en) 1978-04-27
SE432161B true 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) DE2747692C3 (en)
FR (1) FR2369746A1 (en)
SE (1) SE432161B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5247700B2 (en) * 1972-03-06 1977-12-05
US3917956A (en) * 1974-03-08 1975-11-04 Pyrotector Inc Smoke detector
US3946241A (en) * 1973-11-26 1976-03-23 Pyrotector, Incorporated Light detector with pulsed light source and synchronous data gating
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

Also Published As

Publication number Publication date
SE7711904L (en) 1978-04-27
FR2369746A1 (en) 1978-05-26
DE2747692A1 (en) 1978-04-27
JPS5354000A (en) 1978-05-16
DE2747692B2 (en) 1980-02-28
FR2369746B1 (en) 1982-11-05
DE2747692C3 (en) 1988-09-08
JPS6130320B2 (en) 1986-07-12

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