JPH02108193U - - Google Patents

Info

Publication number
JPH02108193U
JPH02108193U JP1739589U JP1739589U JPH02108193U JP H02108193 U JPH02108193 U JP H02108193U JP 1739589 U JP1739589 U JP 1739589U JP 1739589 U JP1739589 U JP 1739589U JP H02108193 U JPH02108193 U JP H02108193U
Authority
JP
Japan
Prior art keywords
voltage
amplifier
smoke detector
inverting
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
JP1739589U
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 JP1739589U priority Critical patent/JPH02108193U/ja
Publication of JPH02108193U publication Critical patent/JPH02108193U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例の回路図、第2図は
同上の動作波形図、第3図は同上の要部回路図、
第4図は本考案に対する比較例の回路図、第5図
は従来例の回路図、第6図は同上の動作波形図、
第7図は従来の光電式煙感知器のブロツク図であ
る。 Cはコンデンサ、Qはアナログスイツチ、A
はバツフアアンプである。

Claims (1)

    【実用新案登録請求の範囲】
  1. 間欠的に発光する発光部と、煙による散乱光を
    受光する受光素子と、受光素子の光電流を電圧信
    号に変換する電流―電圧変換増幅器と、前記電圧
    信号を反転増幅する反転電圧増幅器と、ある濃度
    以上の煙か否かを判定するための電圧比較器と、
    前記反転電圧増幅器と前記電圧比較器の間に配さ
    れてコンデンサと該コンデンサの電位を定常化す
    るために短時間オンされるアナログスイツチを含
    む直流カツト回路とを備える光電式煙感知器にお
    いて、前記反転電圧増幅器と前記直流カツト回路
    の間にバツフアアンプを設けたことを特徴とする
    光電式煙感知器。
JP1739589U 1989-02-15 1989-02-15 Pending JPH02108193U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1739589U JPH02108193U (ja) 1989-02-15 1989-02-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1739589U JPH02108193U (ja) 1989-02-15 1989-02-15

Publications (1)

Publication Number Publication Date
JPH02108193U true JPH02108193U (ja) 1990-08-28

Family

ID=31231141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1739589U Pending JPH02108193U (ja) 1989-02-15 1989-02-15

Country Status (1)

Country Link
JP (1) JPH02108193U (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652468A (ja) * 1992-07-28 1994-02-25 Matsushita Electric Works Ltd 光電式煙感知器
JP2009036562A (ja) * 2007-07-31 2009-02-19 Nohmi Bosai Ltd 煙感知器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0652468A (ja) * 1992-07-28 1994-02-25 Matsushita Electric Works Ltd 光電式煙感知器
JP2009036562A (ja) * 2007-07-31 2009-02-19 Nohmi Bosai Ltd 煙感知器

Similar Documents

Publication Publication Date Title
JPH02108193U (ja)
JPS6348178U (ja)
JPS6257447U (ja)
JPS62165532U (ja)
JPS61195428U (ja)
JPH0250696U (ja)
JPH0358795U (ja)
JPS6335135U (ja)
JPS62158325U (ja)
JPS6411536U (ja)
JPS62158592U (ja)
JPS6232379U (ja)
JPS6395330U (ja)
JPS648842U (ja)
JPH0295809U (ja)
JPS6279767U (ja)
JPS62180366U (ja)
JPH0448711U (ja)
JPS62166654U (ja)
JPH03101035U (ja)
JPS62198708U (ja)
JPS628253U (ja)
JPS62168528U (ja)
JPS6214323U (ja)
JPS6326130U (ja)