WO2001044834A2 - Dispositif de mesure de distance d'un mouvement tridimensionnel a partir d'un seul point de reference - Google Patents

Dispositif de mesure de distance d'un mouvement tridimensionnel a partir d'un seul point de reference Download PDF

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Publication number
WO2001044834A2
WO2001044834A2 PCT/IT2000/000523 IT0000523W WO0144834A2 WO 2001044834 A2 WO2001044834 A2 WO 2001044834A2 IT 0000523 W IT0000523 W IT 0000523W WO 0144834 A2 WO0144834 A2 WO 0144834A2
Authority
WO
WIPO (PCT)
Prior art keywords
laser
displacements
refractive element
measuring system
laser technology
Prior art date
Application number
PCT/IT2000/000523
Other languages
English (en)
Other versions
WO2001044834A3 (fr
Inventor
Guido A. Danieli
Original Assignee
Luise, Nadia, Silvana
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 Luise, Nadia, Silvana filed Critical Luise, Nadia, Silvana
Priority to EP00988998A priority Critical patent/EP1309886A2/fr
Publication of WO2001044834A2 publication Critical patent/WO2001044834A2/fr
Publication of WO2001044834A3 publication Critical patent/WO2001044834A3/fr

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
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/16—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
    • 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
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S17/36—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal

Definitions

  • Displacement's distant optical measurements are of fundamental utility in modern technique. For these measurements the LASER is becoming increasingly important.
  • the present invention allows instead to obtain all components of the motion of a point starting from a single reference point, simply motorising the refractive element of a Laser, that must reflect the Laser ray to allow the measurement of the phase shift and hence of the distance, adding on the side of the first laser, a second laser or a light source whose ray must be focused to generate a light dot in proximity of the refractor element, on a CCD sensor (CCD, Charge Coupled Device) of a digital video camera, whose optic has been replaced by a black tube to reduce natural light interference.
  • CCD sensor Charge Coupled Device
  • the spot of light generates an image on the CCD.
  • the entire video camera complete with optical system is placed inside a container presenting a dark screen in front of the camera to cut the natural light, while the bright spot generates once again an image on the video camera sensor. All these elements have then to be mounted on a device able to move on a plane approximately perpendicular to the Laser ray.
  • the image so generated is transmitted to a computer or digital processor, that, with a programme in Visual Basic or in any other language, analyses the image to detect position modifications, and moves the device with the help of step motors to newly centre the image.
  • the Figure 1 illustrates the system in its completeness, with the two lasers placed in parallel and fixed to the reference system, and with refractor and video camera mounted on the system of which the displacement must be measured.
  • Figure 2 is schematised the distal portion of the measuring device, containing the step motors, video camera and refractors.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

La présente invention concerne un dispositif de mesure de composants de déplacement d'un point dans trois directions perpendiculaires. La base de l'instrument étant un système de mesure de distance au laser, qui mesure l'écart de phase d'un rayon réfracté au moyen d'un élément de réfraction placé sur un point de mesure, et qui fournit avec une précision millimétrique la variation de la distance entre la source laser et l'élément de réfraction. L'instrument traditionnel ne permet cependant pas de mesurer les déplacements dans un plan perpendiculaire au rayon laser. La présente invention montée avec un élément de réfraction sur une plaque motorisée par deux moteurs pas-à-pas permet en ajoutant une caméra vidéo à l'élément de réfraction et une seconde source de lumière parallèle au premier laser de générer sur le capteur de caméra vidéo un spot de lumière, et en analysant l'image digitale, de toujours conserver l'élément de réfraction centré par rapport au rayon agissant sur les moteurs pas-à-pas. Etant donné que les déplacements nécessaires au maintien de l'image centrée sont exactement opposés à ceux de l'instrument, le simple enregistrement des mouvements fournit les deux composants perpendiculaires. Une seconde configuration possible de l'invention est caractérisée par une sensibilité moindre à des déplacements x, y.
PCT/IT2000/000523 1999-12-15 2000-12-15 Dispositif de mesure de distance d'un mouvement tridimensionnel a partir d'un seul point de reference WO2001044834A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00988998A EP1309886A2 (fr) 1999-12-15 2000-12-15 Dispositif de mesure de distance d'un mouvement tridimensionnel a partir d'un seul point de reference

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITCS99A000021 1999-12-15
IT99CS000021A ITCS990021A1 (it) 1999-12-15 1999-12-15 Misuratore a distanza di moto relativo tridimensionale tramite tecnolo gia laser, capace di fornire i valori degli spostamenti del punto di m

Publications (2)

Publication Number Publication Date
WO2001044834A2 true WO2001044834A2 (fr) 2001-06-21
WO2001044834A3 WO2001044834A3 (fr) 2002-07-11

Family

ID=11348390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2000/000523 WO2001044834A2 (fr) 1999-12-15 2000-12-15 Dispositif de mesure de distance d'un mouvement tridimensionnel a partir d'un seul point de reference

Country Status (3)

Country Link
EP (1) EP1309886A2 (fr)
IT (1) ITCS990021A1 (fr)
WO (1) WO2001044834A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305329B6 (cs) * 2010-01-25 2015-08-05 Univerzita Tomáše Bati ve Zlíně Způsob minimalizace průmětové chyby při snímání a analýze dějů kamerovým systémem a zařízení k provádění tohoto způsobu

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641993A2 (fr) * 1993-09-03 1995-03-08 Canon Kabushiki Kaisha Appareil de mesure de formes
EP0661520A1 (fr) * 1993-12-28 1995-07-05 Nikon Corporation Système géodésique à laser
EP0919830A2 (fr) * 1997-10-17 1999-06-02 The Secretary of State for Trade and Industry of Her Majesty's Britannic Government Système de poursuite
US5940180A (en) * 1994-10-11 1999-08-17 Giddings & Lewis Laser interferometer measurement system for use with machine tools

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0641993A2 (fr) * 1993-09-03 1995-03-08 Canon Kabushiki Kaisha Appareil de mesure de formes
EP0661520A1 (fr) * 1993-12-28 1995-07-05 Nikon Corporation Système géodésique à laser
US5940180A (en) * 1994-10-11 1999-08-17 Giddings & Lewis Laser interferometer measurement system for use with machine tools
EP0919830A2 (fr) * 1997-10-17 1999-06-02 The Secretary of State for Trade and Industry of Her Majesty's Britannic Government Système de poursuite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LEIGH-LANCASTER C J ET AL: "Development of a laser tracking system" MECHATRONICS AND MACHINE VISION IN PRACTICE, 1997. PROCEEDINGS., FOURTH ANNUAL CONFERENCE ON TOOWOOMBA, QLD., AUSTRALIA 23-25 SEPT. 1997, LOS ALAMITOS, CA, USA,IEEE COMPUT. SOC, US, 23 September 1997 (1997-09-23), pages 163-168, XP010248272 ISBN: 0-8186-8025-3 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ305329B6 (cs) * 2010-01-25 2015-08-05 Univerzita Tomáše Bati ve Zlíně Způsob minimalizace průmětové chyby při snímání a analýze dějů kamerovým systémem a zařízení k provádění tohoto způsobu

Also Published As

Publication number Publication date
ITCS990021A1 (it) 2000-03-15
WO2001044834A3 (fr) 2002-07-11
EP1309886A2 (fr) 2003-05-14

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