JPH02123691U - - Google Patents

Info

Publication number
JPH02123691U
JPH02123691U JP1989032146U JP3214689U JPH02123691U JP H02123691 U JPH02123691 U JP H02123691U JP 1989032146 U JP1989032146 U JP 1989032146U JP 3214689 U JP3214689 U JP 3214689U JP H02123691 U JPH02123691 U JP H02123691U
Authority
JP
Japan
Prior art keywords
light
smoke detector
change
detection
photoelectric smoke
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.)
Pending
Application number
JP1989032146U
Other languages
English (en)
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 filed Critical
Priority to JP1989032146U priority Critical patent/JPH02123691U/ja
Priority to GB9004603A priority patent/GB2230853B/en
Publication of JPH02123691U publication Critical patent/JPH02123691U/ja
Pending legal-status Critical Current

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)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)

Description

【図面の簡単な説明】
第１図は本考案による光電式煙感知器の一実施
例におけるブロツク図、第２図は第１図の感知器
における各部の周囲温度と光出力との関係を示す
特性曲線図、第３図は発光素子の周囲温度と光出
力との関係を示す特性曲線図、第４図は受光素子
の周囲温度と受光感度との関係を示す特性曲線図
、第５図は従来の出力補償手段を有した光電式煙
感知器の概略構成図である。 ３……煙検出空間、１……発光素子、４……受
光素子、６……温度補償回路、Ｔｈ……サーミス
タ、７……オペアンプ。

Claims (1)

  1. 【実用新案登録請求の範囲】 (1) 煙検出空間に光を照射するように配置され
    た発光素子と、上記煙検出空間の煙により減衰し
    た光または散乱した光を受光するように配置され
    た受光素子とを有すると共に、上記受光素子の出
    力変化を検出する検出手段を有する光電式煙感知
    器において、上記検出手段内に、周囲温度変化に
    基づく検出出力の変化を補償する温度補償手段を
    具備させたことを特徴とする光電式煙感知器。 (2) 温度補償手段として、周囲温度変化によつ
    て抵抗値の変化するサーミスタにより増幅度が制
    御される増幅器とした請求項１記載の光電式煙感
    知器。 (3) 増幅器として、オペアンプとした請求項２
    記載の光電式煙感知器。
JP1989032146U 1989-03-23 1989-03-23 Pending JPH02123691U (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989032146U JPH02123691U (ja) 1989-03-23 1989-03-23
GB9004603A GB2230853B (en) 1989-03-23 1990-03-01 Photoelectric smoke sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989032146U JPH02123691U (ja) 1989-03-23 1989-03-23

Publications (1)

Publication Number Publication Date
JPH02123691U true JPH02123691U (ja) 1990-10-11

Family

ID=12350762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989032146U Pending JPH02123691U (ja) 1989-03-23 1989-03-23

Country Status (2)

Country Link
JP (1) JPH02123691U (ja)
GB (1) GB2230853B (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06288917A (ja) * 1993-03-31 1994-10-18 Nohmi Bosai Ltd 煙式火災感知器
DE19902319B4 (de) * 1999-01-21 2011-06-30 Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 Streulichtbrandmelder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61285598A (ja) * 1985-06-11 1986-12-16 八洲電機株式会社 煙感知装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172354A (en) * 1966-02-16 1969-11-26 Pyrene Co Ltd Improvements relating to Smoke Detectors
US3879718A (en) * 1970-09-16 1975-04-22 Gordon A Roberts Smoke detection unit with dual purpose alarm circuit
CA1052887A (en) * 1974-11-27 1979-04-17 Pyrotector Smoke detector
US4249169A (en) * 1979-05-18 1981-02-03 Malinowski William J Optical smoke detector
DE3146110A1 (de) * 1980-11-24 1982-06-16 Hekatron GmbH, 7811 Sulzburg "optischer rauchdetektor"
AU573243B2 (en) * 1983-08-12 1988-06-02 Vision Systems Limited Pollution detecting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61285598A (ja) * 1985-06-11 1986-12-16 八洲電機株式会社 煙感知装置

Also Published As

Publication number Publication date
GB2230853B (en) 1993-03-17
GB2230853A (en) 1990-10-31
GB9004603D0 (en) 1990-04-25

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