FR2442457A1 - Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap - Google Patents

Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap

Info

Publication number
FR2442457A1
FR2442457A1 FR7833402A FR7833402A FR2442457A1 FR 2442457 A1 FR2442457 A1 FR 2442457A1 FR 7833402 A FR7833402 A FR 7833402A FR 7833402 A FR7833402 A FR 7833402A FR 2442457 A1 FR2442457 A1 FR 2442457A1
Authority
FR
France
Prior art keywords
beams
light beam
optical filter
different wavelengths
support cap
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
FR7833402A
Other languages
French (fr)
Other versions
FR2442457B1 (en
Inventor
Patric Crosnier
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.)
OPTEL
Original Assignee
OPTEL
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 OPTEL filed Critical OPTEL
Priority to FR7833402A priority Critical patent/FR2442457A1/en
Publication of FR2442457A1 publication Critical patent/FR2442457A1/en
Application granted granted Critical
Publication of FR2442457B1 publication Critical patent/FR2442457B1/fr
Granted 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/04—Systems determining the presence of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/74—Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Mechanical Engineering (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

A photoelectric security system detects products or objects which break a light beam. Reflecting objects can cause erroneous signals and this is overcome by emitting two light beams of different wavelengths in the same direction. Two emitters (1, 2) powered from a common source (9) utilise a separator (5) to emit beams on the same axis. The rays are collected by a lens (8) and a microprism reflector (14) reflects the beams to a receiving lens (7). The received beams are separated (6) for two receivers (3, 4). An optical filter on the reflector support cap (13) permits only certain wavelengths to be reflected. The receiver outputs are applied to amplifier stages (10, 11) and a logic circuit (12) provides a single data output signal.
FR7833402A 1978-11-27 1978-11-27 Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap Granted FR2442457A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7833402A FR2442457A1 (en) 1978-11-27 1978-11-27 Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7833402A FR2442457A1 (en) 1978-11-27 1978-11-27 Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap

Publications (2)

Publication Number Publication Date
FR2442457A1 true FR2442457A1 (en) 1980-06-20
FR2442457B1 FR2442457B1 (en) 1982-12-10

Family

ID=9215380

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833402A Granted FR2442457A1 (en) 1978-11-27 1978-11-27 Detection of objects passing through light beam - uses two beams of different wavelengths to eliminate erroneous reflections and has optical filter on reflector support cap

Country Status (1)

Country Link
FR (1) FR2442457A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105528A2 (en) * 1982-10-06 1984-04-18 Erwin Sick GmbH Optik-Elektronik Reflection light barrier
FR2554598A1 (en) * 1983-11-04 1985-05-10 Onera (Off Nat Aerospatiale) Opto-electronic method and apparatus for locating targets carrying polarised luminous points
FR2554612A1 (en) * 1983-11-04 1985-05-10 Onera (Off Nat Aerospatiale) METHOD AND DEVICE FOR AUTOMATICALLY GUIDING MOBILES, PARTICULARLY SELF-PROPELLED SELF-DRIVEN TROLLEYS
EP0273215A2 (en) * 1986-12-09 1988-07-06 Erwin Sick GmbH Optik-Elektronik Autocollimatory light curtain
EP0273433A2 (en) * 1986-12-26 1988-07-06 OMRON Corporation Reflection type photoelectric switch
EP0329083A2 (en) * 1988-02-15 1989-08-23 Omron Tateisi Electronics Co. Photoelectric switching apparatus of reflection type
WO1991004499A1 (en) * 1989-09-15 1991-04-04 Michiel Kassies A method of, and apparatus for, detecting an object
EP0560459A1 (en) * 1992-03-11 1993-09-15 N.V. Nederlandsche Apparatenfabriek NEDAP Device for detecting the position of a movably body
EP1376160A2 (en) * 2002-06-22 2004-01-02 Hans-Erich Sen. Gubela Partial reflector and optical security sensor system
EP4040197A1 (en) * 2021-02-09 2022-08-10 Sick Ag Spectral sensitive optoelectronic device and method for monitoring of a surveillance area

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1038402A (en) * 1962-03-12 1966-08-10 Ass Elect Ind Improvements relating to radiation sensitive equipment
GB1138115A (en) * 1966-01-26 1968-12-27 Servodan As Controlling system using modulated light
DE1934321A1 (en) * 1969-07-07 1971-01-21 Sick Erwin Photoelectric barrier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1038402A (en) * 1962-03-12 1966-08-10 Ass Elect Ind Improvements relating to radiation sensitive equipment
GB1138115A (en) * 1966-01-26 1968-12-27 Servodan As Controlling system using modulated light
DE1934321A1 (en) * 1969-07-07 1971-01-21 Sick Erwin Photoelectric barrier

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105528A2 (en) * 1982-10-06 1984-04-18 Erwin Sick GmbH Optik-Elektronik Reflection light barrier
EP0105528A3 (en) * 1982-10-06 1986-07-02 Erwin Sick GmbH Optik-Elektronik Reflection light barrier
FR2554598A1 (en) * 1983-11-04 1985-05-10 Onera (Off Nat Aerospatiale) Opto-electronic method and apparatus for locating targets carrying polarised luminous points
FR2554612A1 (en) * 1983-11-04 1985-05-10 Onera (Off Nat Aerospatiale) METHOD AND DEVICE FOR AUTOMATICALLY GUIDING MOBILES, PARTICULARLY SELF-PROPELLED SELF-DRIVEN TROLLEYS
EP0146428A1 (en) * 1983-11-04 1985-06-26 Office National D'etudes Et De Recherches Aerospatiales(O.N.E.R.A.) Automatic guiding method and apparatsu for moving objects especially for driverless self-propelled vehicles
EP0273215A2 (en) * 1986-12-09 1988-07-06 Erwin Sick GmbH Optik-Elektronik Autocollimatory light curtain
EP0273215A3 (en) * 1986-12-09 1988-07-27 Erwin Sick Gmbh Optik-Elektronik Autocollimatory light curtain
EP0273433A2 (en) * 1986-12-26 1988-07-06 OMRON Corporation Reflection type photoelectric switch
US5004908A (en) * 1986-12-26 1991-04-02 Omron Tateisi Electronics Co. Reflection type photoelectric switch for detecting the presence of an object
EP0273433A3 (en) * 1986-12-26 1989-11-15 Omron Tateisi Electronics Co. Reflection type photoelectric switch
EP0329083A3 (en) * 1988-02-15 1990-02-14 Omron Tateisi Electronics Co. Photoelectric switching apparatus of reflection type
EP0329083A2 (en) * 1988-02-15 1989-08-23 Omron Tateisi Electronics Co. Photoelectric switching apparatus of reflection type
US5008529A (en) * 1988-02-15 1991-04-16 Omron Tateisi Electronics Co. Photoelectric switching apparatus of reflection type projecting red and infrared light
WO1991004499A1 (en) * 1989-09-15 1991-04-04 Michiel Kassies A method of, and apparatus for, detecting an object
EP0560459A1 (en) * 1992-03-11 1993-09-15 N.V. Nederlandsche Apparatenfabriek NEDAP Device for detecting the position of a movably body
EP1376160A2 (en) * 2002-06-22 2004-01-02 Hans-Erich Sen. Gubela Partial reflector and optical security sensor system
DE10228013A1 (en) * 2002-06-22 2004-01-15 Hans-Erich Sen. Gubela Partial transmission reflector and optical safety sensor system
EP1376160A3 (en) * 2002-06-22 2004-06-23 Hans-Erich Sen. Gubela Partial reflector and optical security sensor system
DE10228013B4 (en) * 2002-06-22 2005-11-03 Hans-Erich Sen. Gubela Partial transmission reflector, use of the partial transmission reflector and optical sensor system
EP4040197A1 (en) * 2021-02-09 2022-08-10 Sick Ag Spectral sensitive optoelectronic device and method for monitoring of a surveillance area

Also Published As

Publication number Publication date
FR2442457B1 (en) 1982-12-10

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