GB2238379A - Obstruction detection apparatus - Google Patents

Obstruction detection apparatus Download PDF

Info

Publication number
GB2238379A
GB2238379A GB8923141A GB8923141A GB2238379A GB 2238379 A GB2238379 A GB 2238379A GB 8923141 A GB8923141 A GB 8923141A GB 8923141 A GB8923141 A GB 8923141A GB 2238379 A GB2238379 A GB 2238379A
Authority
GB
United Kingdom
Prior art keywords
receiver
view
transmitter
field
reflector
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.)
Withdrawn
Application number
GB8923141A
Other languages
English (en)
Other versions
GB8923141D0 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB8923141A priority Critical patent/GB2238379A/en
Publication of GB8923141D0 publication Critical patent/GB8923141D0/en
Priority to AU66142/90A priority patent/AU6614290A/en
Priority to CA 2066613 priority patent/CA2066613A1/fr
Priority to EP19900915791 priority patent/EP0494976A1/fr
Priority to PCT/GB1990/001549 priority patent/WO1991006018A1/fr
Priority to JP51480690A priority patent/JPH05501304A/ja
Publication of GB2238379A publication Critical patent/GB2238379A/en
Withdrawn legal-status Critical Current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
    • G01V8/22—Detecting, e.g. by using light barriers using multiple transmitters or receivers using reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Geophysics And Detection Of Objects (AREA)
GB8923141A 1989-10-13 1989-10-13 Obstruction detection apparatus Withdrawn GB2238379A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB8923141A GB2238379A (en) 1989-10-13 1989-10-13 Obstruction detection apparatus
AU66142/90A AU6614290A (en) 1989-10-13 1990-10-09 Obstruction detection apparatus
CA 2066613 CA2066613A1 (fr) 1989-10-13 1990-10-09 Dispositif de detection d'obstacles
EP19900915791 EP0494976A1 (fr) 1989-10-13 1990-10-09 Appareil detecteur d'obstructions
PCT/GB1990/001549 WO1991006018A1 (fr) 1989-10-13 1990-10-09 Appareil detecteur d'obstructions
JP51480690A JPH05501304A (ja) 1989-10-13 1990-10-09 障害物検知装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8923141A GB2238379A (en) 1989-10-13 1989-10-13 Obstruction detection apparatus

Publications (2)

Publication Number Publication Date
GB8923141D0 GB8923141D0 (en) 1989-11-29
GB2238379A true GB2238379A (en) 1991-05-29

Family

ID=10664556

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8923141A Withdrawn GB2238379A (en) 1989-10-13 1989-10-13 Obstruction detection apparatus

Country Status (6)

Country Link
EP (1) EP0494976A1 (fr)
JP (1) JPH05501304A (fr)
AU (1) AU6614290A (fr)
CA (1) CA2066613A1 (fr)
GB (1) GB2238379A (fr)
WO (1) WO1991006018A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207297A (en) * 1991-12-04 1993-05-04 Trli, Inc. High lift warning system
DE4205251A1 (de) * 1992-02-21 1993-08-26 Hella Kg Hueck & Co Vorrichtung zur ueberwachung des schliessvorganges einer motorisch angetriebenen fensterscheibe, insbesondere einer kraftfahrzeugfensterscheibe
US11867499B2 (en) * 2020-02-19 2024-01-09 Faro Technologies, Inc. System and method for verifying a position of a component on an object

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641549A (en) * 1970-06-25 1972-02-08 Sanders Associates Inc Electro-optical perimeter intrusion alarm
GB1425896A (en) * 1972-03-28 1976-02-18 Visomat Geraete Gmbh Photoelectric detection device
US4029176A (en) * 1975-10-06 1977-06-14 Mills Gerald W Doorway safety device
GB1577638A (en) * 1976-02-02 1980-10-29 Jay Electronique Sa Optical device for an optical safety barrier
GB2060113A (en) * 1979-10-01 1981-04-29 Schieber Universal Maschf Guard for the zone of movement of the carriage of a flatbed knitting machine
US4847488A (en) * 1987-12-23 1989-07-11 Cerberus Ag Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2247053C3 (de) * 1972-09-26 1979-08-09 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Lichtschrankengitter
JPS56158977A (en) * 1980-05-13 1981-12-08 Mitsubishi Electric Corp Presence detector
JPS60151575A (ja) * 1984-01-18 1985-08-09 Iseki & Co Ltd 粒状物通過検出装置
US4649270A (en) * 1984-12-10 1987-03-10 Louis Goldenberg Photo-electric object detector having removable field stop means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641549A (en) * 1970-06-25 1972-02-08 Sanders Associates Inc Electro-optical perimeter intrusion alarm
GB1425896A (en) * 1972-03-28 1976-02-18 Visomat Geraete Gmbh Photoelectric detection device
US4029176A (en) * 1975-10-06 1977-06-14 Mills Gerald W Doorway safety device
GB1577638A (en) * 1976-02-02 1980-10-29 Jay Electronique Sa Optical device for an optical safety barrier
GB2060113A (en) * 1979-10-01 1981-04-29 Schieber Universal Maschf Guard for the zone of movement of the carriage of a flatbed knitting machine
US4847488A (en) * 1987-12-23 1989-07-11 Cerberus Ag Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization

Also Published As

Publication number Publication date
CA2066613A1 (fr) 1991-04-14
WO1991006018A1 (fr) 1991-05-02
AU6614290A (en) 1991-05-16
EP0494976A1 (fr) 1992-07-22
GB8923141D0 (en) 1989-11-29
JPH05501304A (ja) 1993-03-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)