EP0200186A3 - Light barrier - Google Patents

Light barrier Download PDF

Info

Publication number
EP0200186A3
EP0200186A3 EP86105818A EP86105818A EP0200186A3 EP 0200186 A3 EP0200186 A3 EP 0200186A3 EP 86105818 A EP86105818 A EP 86105818A EP 86105818 A EP86105818 A EP 86105818A EP 0200186 A3 EP0200186 A3 EP 0200186A3
Authority
EP
European Patent Office
Prior art keywords
radiation
light barrier
branches
alarm signal
sensor elements
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
EP86105818A
Other languages
German (de)
Other versions
EP0200186B1 (en
EP0200186A2 (en
Inventor
Kurt Muller
Peter Wagli
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.)
Cerberus AG
Original Assignee
Cerberus AG
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 Cerberus AG filed Critical Cerberus AG
Priority to AT86105818T priority Critical patent/ATE64023T1/en
Publication of EP0200186A2 publication Critical patent/EP0200186A2/en
Publication of EP0200186A3 publication Critical patent/EP0200186A3/en
Application granted granted Critical
Publication of EP0200186B1 publication Critical patent/EP0200186B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Luminescent Compositions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Glass Compositions (AREA)
  • Liquid Crystal (AREA)

Abstract

In a light barrier, especially for outside application and long distances monitored, insensitivity to interfering light and scattering through fumes or fog and an increased range and sensitivity to objects passing through the light barrier are achieved by subdividing radiation from a source into two radiation branches which are offset relative to each other and differently polarized, e.g., by means of a polarization filter divided into two parts, with different linear or oppositely circular polarization of the filter part surfaces. By means of an analogously subdivided polarization filter, the radiation of each of the two radiation branches is focused on a different individual sensor element. The two sensor elements are connected in a differential circuit which triggers an alarm signal in response to signals arriving from both radiation branches in short succession but does not trigger an alarm signal if both sensor elements are equally irradiated.
EP86105818A 1985-04-30 1986-04-26 Light barrier Expired - Lifetime EP0200186B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105818T ATE64023T1 (en) 1985-04-30 1986-04-26 PHOTOELECTRIC BARRIER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1825/85 1985-04-30
CH1825/85A CH667340A5 (en) 1985-04-30 1985-04-30 PHOTOELECTRIC BARRIER.

Publications (3)

Publication Number Publication Date
EP0200186A2 EP0200186A2 (en) 1986-11-05
EP0200186A3 true EP0200186A3 (en) 1987-01-21
EP0200186B1 EP0200186B1 (en) 1991-05-29

Family

ID=4219477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105818A Expired - Lifetime EP0200186B1 (en) 1985-04-30 1986-04-26 Light barrier

Country Status (5)

Country Link
US (1) US4734575A (en)
EP (1) EP0200186B1 (en)
AT (1) ATE64023T1 (en)
CH (1) CH667340A5 (en)
DE (1) DE3679443D1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3641926C1 (en) * 1986-12-09 1988-04-28 Sick Optik Elektronik Erwin Autocollimation light curtain
DE3733656C1 (en) * 1987-10-05 1989-02-02 Hoermann Kg Retro-reflective sensor
EP0388352A1 (en) * 1989-03-15 1990-09-19 Elesta Ag Elektronik One way light barrier arrangement
NL8902314A (en) * 1989-09-15 1991-04-02 Michiel Kassies METHOD AND APPARATUS FOR DETECTING AN ARTICLE
US5955854A (en) * 1992-09-29 1999-09-21 Prospects Corporation Power driven venting of a vehicle
WO1999024850A1 (en) * 1997-11-07 1999-05-20 Leuze Electronic Gmbh + Co. Optoelectronic device
DE102004017183A1 (en) * 2004-04-07 2005-11-10 Siemens Ag Overall system, especially medical equipment
WO2009144707A1 (en) * 2008-04-17 2009-12-03 Shilat Optronics Ltd Intrusion warning system
US8471895B2 (en) * 2008-11-25 2013-06-25 Paul S. Banks Systems and methods of high resolution three-dimensional imaging
JP5458813B2 (en) * 2009-11-10 2014-04-02 オムロン株式会社 Photoelectric sensor
EP2813868B1 (en) * 2013-06-11 2021-08-04 Rockwell Automation Switzerland GmbH Method for synchronizing optical units of a photoelectric barrier and light curtain
CN106464858B (en) 2014-04-26 2019-08-20 泰特拉维公司 The method and system of durable and extension illumination waveform for the depth sense in 3D imaging
DE102014013326A1 (en) * 2014-09-15 2016-03-17 Imos Gubela Gmbh Optical sensor system
US11209664B2 (en) 2016-02-29 2021-12-28 Nlight, Inc. 3D imaging system and method
US11212512B2 (en) 2017-12-28 2021-12-28 Nlight, Inc. System and method of imaging using multiple illumination pulses

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457502A (en) * 1944-08-09 1948-12-28 Shepherd Judson O'd Signal system employing polarized light
US3440427A (en) * 1966-04-12 1969-04-22 Philips Corp Remote control system with a unitary cell bridge circuit
GB1214981A (en) * 1967-05-05 1970-12-09 John Horrocks Control means using light filters
DE1946993A1 (en) * 1969-09-17 1971-03-25 Sick Erwin Fa Light barrier for analog measuring purposes
US4342987A (en) * 1979-09-10 1982-08-03 Rossin Corporation Intruder detection system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333008A (en) * 1975-04-21 1982-06-01 Sanders Associates, Inc. Polarization coded doublet laser detection system
FR2347666A1 (en) * 1976-04-09 1977-11-04 France Etat AUTOMATIC TWO WAVELENGTH PHOTOELASTICIMETER
US4339660A (en) * 1980-05-15 1982-07-13 Erwin Sick Gmbh Optik-Elektronik Reflection light barrier apparatus for recognizing both strongly and weakly reflecting objects

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457502A (en) * 1944-08-09 1948-12-28 Shepherd Judson O'd Signal system employing polarized light
US3440427A (en) * 1966-04-12 1969-04-22 Philips Corp Remote control system with a unitary cell bridge circuit
GB1214981A (en) * 1967-05-05 1970-12-09 John Horrocks Control means using light filters
DE1946993A1 (en) * 1969-09-17 1971-03-25 Sick Erwin Fa Light barrier for analog measuring purposes
US4342987A (en) * 1979-09-10 1982-08-03 Rossin Corporation Intruder detection system

Also Published As

Publication number Publication date
ATE64023T1 (en) 1991-06-15
CH667340A5 (en) 1988-09-30
EP0200186B1 (en) 1991-05-29
EP0200186A2 (en) 1986-11-05
US4734575A (en) 1988-03-29
DE3679443D1 (en) 1991-07-04

Similar Documents

Publication Publication Date Title
EP0200186A3 (en) Light barrier
DE68917419D1 (en) Intrusion alarm procedure and system therefor.
CA2220813A1 (en) Passive infrared motion detector and method
ES503363A0 (en) IMPROVEMENTS IN THE DETECTION OF FAULTS IN SENSOR SYSTEMS
NO841314L (en) INFRARED GAS DETECTOR
ES8202646A1 (en) Supervisory assembly including a television set.
ES505974A0 (en) SECURITY SYSTEM TO DETECT INTRUDERS
ES8707821A1 (en) Infra-red radiation detector devices.
IT1203179B (en) SIGNAL PROCESSING SYSTEM
MX146468A (en) IMPROVEMENTS IN THE SURVEILLANCE SYSTEM WITHIN A SPACE TO DETECT THE PRESENCE OF A WARNING ELEMENT IN AN AREA NOT AUTHORIZED THROUGH A TRANSMITTER RECEIVER OF ELECTROMAGNETIC WAVES
ES2152335T3 (en) CAPACITIVE DETECTOR DEVICE AND ALARM SYSTEM.
ES498841A0 (en) CIRCUIT AND ALARM SYSTEM TO DETECT THE INTRUSION AND LOCATION OF VEHICLES.
DE69002032T2 (en) Particle sensors with electronic detection.
ATE16861T1 (en) MONITORING AND ALARM PROCEDURES AND RELEVANT DEVICE.
GB1447372A (en) Thermal radiation sensing conveyor particularly for a machine producing a roofing tile or the like
ATE173083T1 (en) SENSOR FOR DETECTING ELECTROMAGNETIC RADIATION
FR2450530B1 (en) DETECTION CIRCUIT, IN PARTICULAR AM DETECTOR
KR850005117A (en) Ray boundary
JPS57141574A (en) Warning device for travelling obstacle
SU694877A1 (en) Device for signalizing the presence of smoke
JPS52104248A (en) Abnormality detection device of laser beam
JPS5436457A (en) Actuator abnormality detection system
JPS57181434A (en) Position detector for head in disc storage device
JPH03180729A (en) Pyroelectric type infrared detector
JPS57136174A (en) Optical finding trace system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19860426

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19890912

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910529

Ref country code: NL

Effective date: 19910529

Ref country code: BE

Effective date: 19910529

REF Corresponds to:

Ref document number: 64023

Country of ref document: AT

Date of ref document: 19910615

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3679443

Country of ref document: DE

Date of ref document: 19910704

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920426

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940309

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940316

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940406

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950426

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19950517

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950426

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19951229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960430

Ref country code: CH

Effective date: 19960430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050426