JPS6455699A - Dimming type smoke sensor - Google Patents

Dimming type smoke sensor

Info

Publication number
JPS6455699A
JPS6455699A JP21245587A JP21245587A JPS6455699A JP S6455699 A JPS6455699 A JP S6455699A JP 21245587 A JP21245587 A JP 21245587A JP 21245587 A JP21245587 A JP 21245587A JP S6455699 A JPS6455699 A JP S6455699A
Authority
JP
Japan
Prior art keywords
light
level
received
infrared rays
monitor area
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.)
Granted
Application number
JP21245587A
Other languages
Japanese (ja)
Other versions
JP2949286B2 (en
Inventor
Yoji Konishi
Yutaka Kojima
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.)
Panasonic Electric Works Co Ltd
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
Priority to JP62212455A priority Critical patent/JP2949286B2/en
Publication of JPS6455699A publication Critical patent/JPS6455699A/en
Application granted granted Critical
Publication of JP2949286B2 publication Critical patent/JP2949286B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE:To find a fire and to monitor the degree of contamination of air in a room by detecting the change of the quantity of light of infrared rays emitted from a light emitting part which are received by a light reception processing part after passing a monitor area. CONSTITUTION:Since the quantity of light of infrared rays received by a light reception processing part II is reduced according as the carbon dioxide concentration in a monitor area 7 is increased, the detection signal level of a pyroelectric infrared detector 3 is reduced according as this concentration is increased. Since only the variation of received infrared rays is detected in accordance with the characteristic of the pyroelectric infrared detector 3 and the differential output is obtained, this signal is amplified to a prescribed level by a signal amplification processing circuit 4, and thereafter, the processing output is obtained by peak holding or integration. The obtained processing output is compared with a reference level by a level discriminating circuit 5 because it is reduced in accordance with the carbon dioxide concentration in the monitor area 7, and an abnormality signal is outputted if it is lower than the reference level. Thus, smoke and flames are sensed and the degree of contamination of air due to existence of persons or the like is detected.
JP62212455A 1987-08-26 1987-08-26 Dimmable carbon dioxide concentration sensor Expired - Lifetime JP2949286B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62212455A JP2949286B2 (en) 1987-08-26 1987-08-26 Dimmable carbon dioxide concentration sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62212455A JP2949286B2 (en) 1987-08-26 1987-08-26 Dimmable carbon dioxide concentration sensor

Publications (2)

Publication Number Publication Date
JPS6455699A true JPS6455699A (en) 1989-03-02
JP2949286B2 JP2949286B2 (en) 1999-09-13

Family

ID=16622908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62212455A Expired - Lifetime JP2949286B2 (en) 1987-08-26 1987-08-26 Dimmable carbon dioxide concentration sensor

Country Status (1)

Country Link
JP (1) JP2949286B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04507161A (en) * 1990-04-02 1992-12-10 ガズテク　インタナショナル　コーポレイション simple fire detector
JP2018515787A (en) * 2015-03-06 2018-06-14 フラウンホーファー−ゲゼルシャフト ツル フェルデルング デル アンゲヴァンテン フォルシュング エー ファウＦｒａｕｎｈｏｆｅｒ−Ｇｅｓｅｌｌｓｃｈａｆｔ ｚｕｒ Ｆｏｅｒｄｅｒｕｎｇ ｄｅｒ ａｎｇｅｗａｎｄｔｅｎ Ｆｏｒｓｃｈｕｎｇ ｅ．Ｖ． Method and apparatus for optically detecting motion in a biological sample having spatial extent
CN113161253A (en) * 2021-01-25 2021-07-23 上海磬采电力科技开发有限公司 Wafer surface impurity pollution degree detection system
WO2022127458A1 (en) * 2020-12-16 2022-06-23 青岛海尔空调器有限总公司 Air conditioner, and control method and system therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101938A1 (en) * 2010-02-16 2011-08-25 日本電気株式会社 Infrared ray sensor, infrared ray detection device, and electronic apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4896098A (en) * 1972-03-21 1973-12-08
JPS5732842U (en) * 1980-07-31 1982-02-20
JPS58218639A (en) * 1982-06-15 1983-12-19 Tetsuji Matsui Open light path system infrared-ray gas analyzer
JPS5934252A (en) * 1982-08-23 1984-02-24 有限会社友信開発 Low friction artificial joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4896098A (en) * 1972-03-21 1973-12-08
JPS5732842U (en) * 1980-07-31 1982-02-20
JPS58218639A (en) * 1982-06-15 1983-12-19 Tetsuji Matsui Open light path system infrared-ray gas analyzer
JPS5934252A (en) * 1982-08-23 1984-02-24 有限会社友信開発 Low friction artificial joint

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04507161A (en) * 1990-04-02 1992-12-10 ガズテク　インタナショナル　コーポレイション simple fire detector
JP2018515787A (en) * 2015-03-06 2018-06-14 フラウンホーファー−ゲゼルシャフト ツル フェルデルング デル アンゲヴァンテン フォルシュング エー ファウＦｒａｕｎｈｏｆｅｒ−Ｇｅｓｅｌｌｓｃｈａｆｔ ｚｕｒ Ｆｏｅｒｄｅｒｕｎｇ ｄｅｒ ａｎｇｅｗａｎｄｔｅｎ Ｆｏｒｓｃｈｕｎｇ ｅ．Ｖ． Method and apparatus for optically detecting motion in a biological sample having spatial extent
WO2022127458A1 (en) * 2020-12-16 2022-06-23 青岛海尔空调器有限总公司 Air conditioner, and control method and system therefor
CN113161253A (en) * 2021-01-25 2021-07-23 上海磬采电力科技开发有限公司 Wafer surface impurity pollution degree detection system

Also Published As

Publication number Publication date
JP2949286B2 (en) 1999-09-13

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