DE68913743D1 - Detektorschaltung. - Google Patents

Detektorschaltung.

Info

Publication number
DE68913743D1
DE68913743D1 DE89905133T DE68913743T DE68913743D1 DE 68913743 D1 DE68913743 D1 DE 68913743D1 DE 89905133 T DE89905133 T DE 89905133T DE 68913743 T DE68913743 T DE 68913743T DE 68913743 D1 DE68913743 D1 DE 68913743D1
Authority
DE
Germany
Prior art keywords
detector circuit
detector
circuit
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.)
Expired - Fee Related
Application number
DE89905133T
Other languages
English (en)
Other versions
DE68913743T2 (de
Inventor
John Trett
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.)
Formula Systems Ltd
Original Assignee
Formula Systems 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 Formula Systems Ltd filed Critical Formula Systems Ltd
Application granted granted Critical
Publication of DE68913743D1 publication Critical patent/DE68913743D1/de
Publication of DE68913743T2 publication Critical patent/DE68913743T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Electronic Switches (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Air Bags (AREA)
  • Electrophonic Musical Instruments (AREA)
DE68913743T 1988-07-26 1989-04-17 Detektorschaltung. Expired - Fee Related DE68913743T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8817759A GB2221294B (en) 1988-07-26 1988-07-26 Detection circuitry
PCT/GB1989/000400 WO1990001173A1 (en) 1988-07-26 1989-04-17 Detection circuitry

Publications (2)

Publication Number Publication Date
DE68913743D1 true DE68913743D1 (de) 1994-04-14
DE68913743T2 DE68913743T2 (de) 1994-06-23

Family

ID=10641112

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68913743T Expired - Fee Related DE68913743T2 (de) 1988-07-26 1989-04-17 Detektorschaltung.

Country Status (10)

Country Link
US (1) US5053616A (de)
EP (1) EP0426677B1 (de)
JP (1) JPH04501603A (de)
AU (1) AU622673B2 (de)
CA (1) CA1313546C (de)
DE (1) DE68913743T2 (de)
GB (1) GB2221294B (de)
NZ (1) NZ229921A (de)
PH (1) PH26943A (de)
WO (1) WO1990001173A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266143A (en) * 1992-04-16 1993-10-20 Ind Tech Res Inst Palm-triggered photo switch
US5371353A (en) * 1992-07-31 1994-12-06 Oki Electric Industry Co., Ltd. Object detecting device having multiple optical sensors with a common output line and a common selection signal line
US6050369A (en) * 1994-10-07 2000-04-18 Toc Holding Company Of New York, Inc. Elevator shaftway intrusion device using optical imaging processing
US5644111A (en) * 1995-05-08 1997-07-01 New York City Housing Authority Elevator hatch door monitoring system
DE19718389A1 (de) * 1997-04-30 1998-11-05 Sick Ag Opto-elektronische Sensoranordnung
DE59811662D1 (de) * 1997-04-30 2004-08-19 Sick Ag Opto-elektronische Sensoranordnung mit mehreren in einer Zeile oder einem Array angeordneten photoempfindlichen Elementen
DE19718390A1 (de) * 1997-04-30 1998-11-05 Sick Ag Opto-elektronischer Sensor
US6881972B2 (en) * 2002-11-04 2005-04-19 Hewlett-Packard Development Company, L.P. Media stiffness detection device and method therefor
GB2420176B (en) * 2004-11-15 2009-11-04 Memco Ltd Safety sensing system for a powered door system
US20070210267A1 (en) * 2006-02-27 2007-09-13 Sharp Kabushiki Kaisha Optical ranging sensor and warm water wash toilet seat

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE385746B (sv) * 1974-09-20 1976-07-19 Telub Ab Anordning for detektering av ett i en ljusrida inforbart objekt
DE2538275B2 (de) * 1975-08-28 1979-12-13 Unidor Gmbh, 7530 Pforzheim Lichtschranke
AU509436B2 (en) * 1976-05-05 1980-05-15 3M Australia Pty Limited Optoelectronic detection apparatus
US4085862A (en) * 1976-10-08 1978-04-25 Dickey-John Corporation Automatically controlled seed planter
US4260882A (en) * 1978-05-17 1981-04-07 Barnes Austen B Light sensitive detection circuit
US4309696A (en) * 1978-06-26 1982-01-05 Kabushiki Kaisha Komatsu Seisakusho Trouble detecting unit in an optical security device
US4430646A (en) * 1980-12-31 1984-02-07 American District Telegraph Company Forward scatter smoke detector
DE3277425D1 (en) * 1981-02-10 1987-11-05 Otis Elevator Co Photoelectric obstruction detector for elevator doorways
US4434363A (en) * 1981-05-11 1984-02-28 Matsushita Electric Works, Ltd. Photoelectric switching apparatus
US4539556A (en) * 1983-04-15 1985-09-03 Pittway Corporation Combustion products detector with accelerated test
GB8527277D0 (en) * 1985-11-06 1985-12-11 Formula Systems Ltd Proximity detector
AU623540B2 (en) * 1989-07-10 1992-05-14 Saipem Australia Pty. Limited Acoustic oscillator

Also Published As

Publication number Publication date
AU3542589A (en) 1990-02-19
DE68913743T2 (de) 1994-06-23
AU622673B2 (en) 1992-04-16
EP0426677A1 (de) 1991-05-15
CA1313546C (en) 1993-02-09
EP0426677B1 (de) 1994-03-09
WO1990001173A1 (en) 1990-02-08
GB2221294B (en) 1993-03-03
JPH04501603A (ja) 1992-03-19
PH26943A (en) 1992-12-03
GB2221294A (en) 1990-01-31
NZ229921A (en) 1991-06-25
GB8817759D0 (en) 1988-09-01
US5053616A (en) 1991-10-01

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee