DE69225487D1 - Vorrichtung und Verfahren zur Funktionssicherstellung insbesondere einer Lichtschranke - Google Patents

Vorrichtung und Verfahren zur Funktionssicherstellung insbesondere einer Lichtschranke

Info

Publication number
DE69225487D1
DE69225487D1 DE69225487T DE69225487T DE69225487D1 DE 69225487 D1 DE69225487 D1 DE 69225487D1 DE 69225487 T DE69225487 T DE 69225487T DE 69225487 T DE69225487 T DE 69225487T DE 69225487 D1 DE69225487 D1 DE 69225487D1
Authority
DE
Germany
Prior art keywords
microcontroller
machine
watchdog
intrusion
stopping sequence
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
DE69225487T
Other languages
English (en)
Other versions
DE69225487T2 (de
Inventor
James Dogul
Sandip Sarkar
Frederick Thomson
Robert Thomson
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.)
Frost Controls Inc
Original Assignee
Frost Controls Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25039694&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69225487(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Frost Controls Inc filed Critical Frost Controls Inc
Publication of DE69225487D1 publication Critical patent/DE69225487D1/de
Application granted granted Critical
Publication of DE69225487T2 publication Critical patent/DE69225487T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • G06F11/26—Functional testing
    • G06F11/261—Functional testing by simulating additional hardware, e.g. fault simulation
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Electronic Switches (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Safety Devices In Control Systems (AREA)
DE69225487T 1991-09-05 1992-08-31 Vorrichtung und Verfahren zur Funktionssicherstellung insbesondere einer Lichtschranke Expired - Fee Related DE69225487T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/755,566 US5218196A (en) 1991-09-05 1991-09-05 Light curtain system with system and watchdog microcontrollers
PCT/US1992/007368 WO1993005412A1 (en) 1991-09-05 1992-08-31 Area light switch

Publications (2)

Publication Number Publication Date
DE69225487D1 true DE69225487D1 (de) 1998-06-18
DE69225487T2 DE69225487T2 (de) 1999-03-25

Family

ID=25039694

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69225487T Expired - Fee Related DE69225487T2 (de) 1991-09-05 1992-08-31 Vorrichtung und Verfahren zur Funktionssicherstellung insbesondere einer Lichtschranke

Country Status (5)

Country Link
US (2) US5218196A (de)
EP (2) EP0605496B1 (de)
AU (1) AU2561392A (de)
DE (1) DE69225487T2 (de)
WO (1) WO1993005412A1 (de)

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Also Published As

Publication number Publication date
EP0605496A1 (de) 1994-07-13
WO1993005412A1 (en) 1993-03-18
EP0605496A4 (de) 1995-03-22
DE69225487T2 (de) 1999-03-25
US5559664A (en) 1996-09-24
EP0605496B1 (de) 1998-05-13
EP0819881A2 (de) 1998-01-21
EP0819881A3 (de) 2001-08-22
AU2561392A (en) 1993-04-05
US5218196A (en) 1993-06-08

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