AU750314B2 - Light obstruction type smoke sensor - Google Patents

Light obstruction type smoke sensor Download PDF

Info

Publication number
AU750314B2
AU750314B2 AU15428/99A AU1542899A AU750314B2 AU 750314 B2 AU750314 B2 AU 750314B2 AU 15428/99 A AU15428/99 A AU 15428/99A AU 1542899 A AU1542899 A AU 1542899A AU 750314 B2 AU750314 B2 AU 750314B2
Authority
AU
Australia
Prior art keywords
light
level
control signal
generation control
received light
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.)
Ceased
Application number
AU15428/99A
Other languages
English (en)
Other versions
AU1542899A (en
Inventor
Isao Asano
Satoshi Nakajima
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
Application filed by Hochiki Corp filed Critical Hochiki Corp
Publication of AU1542899A publication Critical patent/AU1542899A/en
Application granted granted Critical
Publication of AU750314B2 publication Critical patent/AU750314B2/en
Anticipated expiration legal-status Critical
Ceased 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
    • 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

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)
AU15428/99A 1998-02-05 1999-02-04 Light obstruction type smoke sensor Ceased AU750314B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10-024358 1998-02-05
JP10024358A JPH11224387A (ja) 1998-02-05 1998-02-05 減光式煙感知器

Publications (2)

Publication Number Publication Date
AU1542899A AU1542899A (en) 1999-08-26
AU750314B2 true AU750314B2 (en) 2002-07-18

Family

ID=12135984

Family Applications (1)

Application Number Title Priority Date Filing Date
AU15428/99A Ceased AU750314B2 (en) 1998-02-05 1999-02-04 Light obstruction type smoke sensor

Country Status (6)

Country Link
US (1) US6094143A (enExample)
JP (1) JPH11224387A (enExample)
AU (1) AU750314B2 (enExample)
CH (1) CH694649A5 (enExample)
DE (1) DE19904535A1 (enExample)
GB (1) GB2334096B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4559664B2 (ja) * 2001-06-29 2010-10-13 ニッタン株式会社 光電分離型煙感知器および防災システム
DE60210738T2 (de) * 2002-01-16 2007-04-12 Leeds Electronic Eng. Ltd. Diebstahlschutzalarm mit reduzierter Verdrahtung
US8021469B2 (en) * 2005-07-14 2011-09-20 Access Business Group International Llc Control methods for an air treatment system
DE202007013986U1 (de) * 2007-10-05 2008-02-07 Cedes Ag Vorrichtung zur Steuerung eines angetriebenen Bewegungselements, insbesondere einer Tür oder eines Tores
CN106155861A (zh) * 2015-04-22 2016-11-23 鸿富锦精密工业(武汉)有限公司 电子设备报警电路
KR102508926B1 (ko) * 2022-06-09 2023-03-14 (주)전원테크 광전식 화재감지기의 수명을 관리할 수 있는 화재감시 시스템

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074721A (en) * 1980-04-23 1981-11-04 Furnace Construction Co Ltd Smoke sensor apparatus
GB2095821A (en) * 1981-03-17 1982-10-06 Malinowski William J Self-calibrating smoke detector and method
US5708414A (en) * 1993-08-19 1998-01-13 Sentrol, Inc. Sensitivity fault indication technique implemented in smoke detector system with self-diagnostic capabilities

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60144458U (ja) * 1984-03-05 1985-09-25 ホーチキ株式会社 火災検出装置
JPS61247918A (ja) * 1985-04-26 1986-11-05 Hochiki Corp アナログセンサの出力補正装置
GB9212060D0 (en) * 1992-06-04 1992-07-22 Appleby David Obscuration sensor
JP3231886B2 (ja) * 1993-03-31 2001-11-26 能美防災株式会社 光電式火災感知器
EP0629983A1 (en) * 1993-06-02 1994-12-21 David Appleby Obscuration type smoke detector
FR2723233B1 (fr) * 1994-07-29 1996-10-04 Lewiner Jacques Perfectionnements aux detecteurs optiques de fumees
GB2314618B (en) * 1996-06-26 1999-12-29 David Appleby Smoke detector using light scatter and extinction
US5705988A (en) * 1996-07-08 1998-01-06 Detection Systems, Inc. Photoelectric smoke detector with count based A/D and D/A converter
US5831537A (en) * 1997-10-27 1998-11-03 Slc Technologies, Inc. Electrical current saving combined smoke and fire detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074721A (en) * 1980-04-23 1981-11-04 Furnace Construction Co Ltd Smoke sensor apparatus
GB2095821A (en) * 1981-03-17 1982-10-06 Malinowski William J Self-calibrating smoke detector and method
US5708414A (en) * 1993-08-19 1998-01-13 Sentrol, Inc. Sensitivity fault indication technique implemented in smoke detector system with self-diagnostic capabilities

Also Published As

Publication number Publication date
GB2334096A (en) 1999-08-11
DE19904535A1 (de) 1999-08-12
CH694649A5 (de) 2005-05-13
US6094143A (en) 2000-07-25
AU1542899A (en) 1999-08-26
GB2334096B (en) 2002-05-29
JPH11224387A (ja) 1999-08-17

Similar Documents

Publication Publication Date Title
US7440100B2 (en) Method for evaluation of a scattered light signal and scattered light detector used for carrying out said method
US6153985A (en) LED driving circuitry with light intensity feedback to control output light intensity of an LED
CA1234199A (en) Photoelectric smoke sensor
US6646251B1 (en) Separate type photoelectric switch
US6611611B2 (en) Particle sensor
AU750314B2 (en) Light obstruction type smoke sensor
US4713545A (en) Device for detecting objects, particularly such in motion
AU666445B2 (en) Fire detector
US5623249A (en) Video monitor motion sensor
JP7443154B2 (ja) 光学式レインセンサの発光デバイスのドライバ電流の実時間微調整
US4647763A (en) Linear analog light-level monitoring system
JPH10276048A (ja) オフセット補償回路
CN114062213A (zh) 烟雾检测传感器电路及烟雾传感器
EP1494324A2 (en) Semiconductor laser drive circuit and photoelectric sensor
JPH08178618A (ja) 光学式センサ
US7502568B1 (en) Method of using low bandwidth sensor for measuring high frequency AC modulation amplitude
JPH11238185A (ja) 減光式煙感知器
USRE33205E (en) Linear analog light-level monitoring system having short leads to reduce electronic noise
JPH0694843A (ja) 光電スイッチ
JPS63288515A (ja) 光検出装置
JPH085456A (ja) 光センサ回路および光センサ回路を用いた制御装置
JP3152582B2 (ja) カード検出回路
JPH0332836B2 (enExample)
JP2000315836A (ja) レーザダイオード劣化判定装置
JPH02193426A (ja) 光出力低下アラーム発出方法