WO2004008074A3 - Optical transducer for the detection and the remote indication of the positions of a movable member, particularly of a valve member, along a path bethween two end-of-travel positions - Google Patents

Optical transducer for the detection and the remote indication of the positions of a movable member, particularly of a valve member, along a path bethween two end-of-travel positions Download PDF

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Publication number
WO2004008074A3
WO2004008074A3 PCT/EP2003/006966 EP0306966W WO2004008074A3 WO 2004008074 A3 WO2004008074 A3 WO 2004008074A3 EP 0306966 W EP0306966 W EP 0306966W WO 2004008074 A3 WO2004008074 A3 WO 2004008074A3
Authority
WO
WIPO (PCT)
Prior art keywords
positions
light
dimmer
diodes
along
Prior art date
Application number
PCT/EP2003/006966
Other languages
French (fr)
Other versions
WO2004008074A2 (en
Inventor
Lorenzo Bracco
Mario Desilani
Original Assignee
Apss S R L
Rizzio Valvole S P A
Lorenzo Bracco
Mario Desilani
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 Apss S R L, Rizzio Valvole S P A, Lorenzo Bracco, Mario Desilani filed Critical Apss S R L
Priority to AU2003250867A priority Critical patent/AU2003250867A1/en
Publication of WO2004008074A2 publication Critical patent/WO2004008074A2/en
Publication of WO2004008074A3 publication Critical patent/WO2004008074A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34776—Absolute encoders with analogue or digital scales
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0058—Optical means, e.g. light transmission, observation ports

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Optical Transform (AREA)

Abstract

The transducer comprises a pair of fixed and rigid supports (14, 16), fast to each other and located on one side and the other side, respectively, of a dimming plane (P) along which a dimmer (24) moves. One of the supports carries a row of light- emitting diodes (PE) and the other carries a corresponding row of light-receiving diodes (PR). The rows of diodes (PE; PR) extend along respective paths parallel to each other and located on respectiv opposite sides of the dimming plane (P) in which the dimmer is movable. The dimmer (24) has, in the dimming plane, an edge whose outline is such that the light-receiving diodes (PR) are progressively masked and illuminated. The transducer further comprises processing means adapted to receive the electrical signals from light-receiving diodes (PR) and to deliver at least one signal indicative of the masking proportion of the light receiving diodes by the dimmer (24).
PCT/EP2003/006966 2002-07-15 2003-07-01 Optical transducer for the detection and the remote indication of the positions of a movable member, particularly of a valve member, along a path bethween two end-of-travel positions WO2004008074A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003250867A AU2003250867A1 (en) 2002-07-15 2003-07-01 Optical transducer for the detection and the remote indication of the positions of a movable member, particularly of a valve member, along a path bethween two end-of-travel positions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002TO000614A ITTO20020614A1 (en) 2002-07-15 2002-07-15 OPTICAL TRANSDUCER FOR DETECTION AND INDICATION FROM A DISTANCE OF THE POSITIONS OF A MOBILE BODY PARTICULARLY OF A VALVE BODY, LONG
ITTO2002A000614 2002-07-15

Publications (2)

Publication Number Publication Date
WO2004008074A2 WO2004008074A2 (en) 2004-01-22
WO2004008074A3 true WO2004008074A3 (en) 2004-04-08

Family

ID=11459495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/006966 WO2004008074A2 (en) 2002-07-15 2003-07-01 Optical transducer for the detection and the remote indication of the positions of a movable member, particularly of a valve member, along a path bethween two end-of-travel positions

Country Status (3)

Country Link
AU (1) AU2003250867A1 (en)
IT (1) ITTO20020614A1 (en)
WO (1) WO2004008074A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3372883B1 (en) * 2017-03-09 2019-12-11 VAT Holding AG Vacuum valve with optical sensor
CN111307443B (en) * 2020-01-09 2021-03-19 中国矿业大学 Method for testing opening of breather valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476302A1 (en) * 1980-02-19 1981-08-21 Gen Atomic Co POSITION INDICATOR
US6268601B1 (en) * 1998-12-02 2001-07-31 Honeywell International Inc. Apparatus for determing the position of a rotating shaft
WO2002097313A1 (en) * 2001-05-28 2002-12-05 A.P.S.S. S.R.L. Optical transducer for the detection and the remote indication of predetermined positions of a movable member, particularly of a valve member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476302A1 (en) * 1980-02-19 1981-08-21 Gen Atomic Co POSITION INDICATOR
US6268601B1 (en) * 1998-12-02 2001-07-31 Honeywell International Inc. Apparatus for determing the position of a rotating shaft
WO2002097313A1 (en) * 2001-05-28 2002-12-05 A.P.S.S. S.R.L. Optical transducer for the detection and the remote indication of predetermined positions of a movable member, particularly of a valve member

Also Published As

Publication number Publication date
AU2003250867A1 (en) 2004-02-02
WO2004008074A2 (en) 2004-01-22
AU2003250867A8 (en) 2004-02-02
ITTO20020614A0 (en) 2002-07-15
ITTO20020614A1 (en) 2004-01-15

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