WO2001077610A1 - Procede et dispositif pour mesurer des objets en trois dimensions - Google Patents

Procede et dispositif pour mesurer des objets en trois dimensions Download PDF

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Publication number
WO2001077610A1
WO2001077610A1 PCT/EP2001/004140 EP0104140W WO0177610A1 WO 2001077610 A1 WO2001077610 A1 WO 2001077610A1 EP 0104140 W EP0104140 W EP 0104140W WO 0177610 A1 WO0177610 A1 WO 0177610A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensors
feeler
movement
measuring
probe
Prior art date
Application number
PCT/EP2001/004140
Other languages
German (de)
English (en)
Inventor
Günther PERTHEN
Harald Riffert
Original Assignee
Helios Messtechnik Gmbh & Co. Kg
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 Helios Messtechnik Gmbh & Co. Kg filed Critical Helios Messtechnik Gmbh & Co. Kg
Publication of WO2001077610A1 publication Critical patent/WO2001077610A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
    • G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points

Definitions

  • the present invention relates to a device and a method for the three-dimensional measurement of objects, in particular objects of larger dimensions.
  • optical methods are also known, be it triangulation with theodolites or with lasers or imaging methods. Such optical methods are generally very complex or fail when undercut components have to be measured.
  • DE-A-36 24 959 an automatic method for non-contact three-dimensional measurement of objects of large dimensions is known.
  • motorized camera sensors are used there, which detect a characteristic point on the surface of the object in the image and angular position and the data in a computer process that the position of the point results in three-dimensional space.
  • the linking of several measuring points enables the dimensions of the measurement object to be determined.
  • this method which is disclosed in DE-A-36 24 959, is relatively complex and can therefore be used advantageously only for special applications, for example of measurement objects that are difficult or difficult to access.
  • multi-coordinate measuring machines that can be used universally are known. However, these measuring machines are relatively large and bulky and can therefore only be used if the measuring objects can be brought to the measuring machine. In addition, such multi-coordinate measuring machines are relatively expensive.
  • the new device or the new method should make it possible to measure three-dimensionally large-scale objects in a simple manner and with a high level of measurement accuracy, the device or the method being universally applicable.
  • this object is achieved by a device with the features of claim 1 or a method with the features of claim 19.
  • the new device or the new method is characterized in that the measurement by means of a feeler device known per se, which detects the surface of the measurement object to be measured, a motion detection system rigidly connected thereto, which detects the position of the feeler device in space directly via corresponding sensors, and an evaluation unit is carried out.
  • the device can be designed in particular as a portable hand-held device and thus allows direct, arbitrary access to the measurement object. Because of the relatively simple construction and the few components of the device, the device according to the invention can also be produced relatively inexpensively in comparison to the conventional measuring machines.
  • the motion detection system consists of at least three sensors for detecting a movement of the feeler device and for generating corresponding measurement signals which are a measure of the movement of the feeler device, the three sensors preferably being acceleration sensors which detect three different directional components of the translational movement of the feeler device.
  • the three spatial coordinates of the position of the feeler device are continuously calculated by integrating three corresponding differential equations.
  • the device preferably also has at least three further sensors for detecting a rotary movement of the probe device and for generating corresponding measurement signals which are a measure of the rotation of the probe device, so that the evaluation unit comprises a total of six measurement signals from the at least three sensors and the at least one three other sensors can continuously calculate the three current coordinates and angles of the probe in space.
  • the three further sensors can also be acceleration sensors, or they can be designed as differential acceleration sensors or rotation rate sensors.
  • the measuring device has an interface for transmitting the measuring signals generated by the sensors and the further sensors and / or the values calculated by the evaluation unit for the position and orientation of the probe device to an external device for further processing.
  • Figure 1 is a greatly simplified perspective view of an inventive
  • FIG. 2 shows a schematic illustration of the structure of the measuring device from FIG. 1.
  • FIGS. 1 and 2 show a preferred embodiment of a measuring device according to the present invention in a greatly simplified representation.
  • the essential elements of the measuring device 1 are a probe device 2 for detecting the surface of a measuring object to be measured (not shown), a motion detection system 8 and an evaluation unit 11.
  • the measuring device 1 consists of a housing 3 in which the components 4-12 of the measuring device are housed and on the outside at a suitable point the touch device 2 is attached.
  • the probe device 2 is preferably attached to the housing 3 in an exchangeable manner in order to be able to use a suitable probe device 2 depending on the type of object to be measured and / or the type of measurement, and thus to increase the flexibility of the measuring device 1.
  • any known touch device can be used as the touch device 2, which is suitable for detecting the surface of a measurement object to be measured is.
  • this is a sufficiently precise switch which, when the measurement object is touched, sends a corresponding measurement signal to the evaluation unit 2.
  • the mechanical switch can also be replaced by a switch that optically detects the surface of the measuring object, or, if necessary, by a switch that detects magnetically, capacitively or the like.
  • the switch is replaced by a measuring system "(electro) magnetically gathering can be realized also both mechanically antastend and optically, capacitively or.
  • the movement detection system 8 in the exemplary embodiment shown consists of six independent sensors 9, 10.
  • the type and arrangement of the sensors 9, 10 it should be noted that six independent quantities of the movement of the measuring device are used at all times and thus the probe device 2 rigidly attached to the measuring device 1 can be determined. In this way it is possible to determine the position of the measuring and probe devices 1, 2 in space in the six degrees of freedom, i.e. in the three spatial coordinates and the three solid angles.
  • the measurement signals coming from the sensors 9, 10 are brought into a form suitable for the evaluation unit 11. Then a corresponding system of six differential equations is continuously integrated in the evaluation unit 11.
  • the evaluation unit 11 usually contains a microprocessor or digital signal processor.
  • other electrically or optically operating methods for evaluating the measurement signals are also conceivable.
  • a position measuring system 8 with at least six independent sensors 9, 10 is preferably used, while the position measuring system 8 with only three independent sensors 9 is only used in few cases with lower demands on the measurement accuracy should be sufficient.
  • acceleration sensors are used to detect the translational movement of the feeler device 2.
  • Acceleration sensors are basically known from the prior art thereof will be omitted here a more detailed description of the operation and structure, and can in principle be used in any known "or possible embodiment of the inventive Meßvomchtung first principle, it would also be conceivable, instead of the acceleration sensors 9 to use three independent speed sensors, but higher acceleration accuracies can be achieved with the preferred acceleration sensors.
  • the other three independent sensors 10 of the position measuring system 8 can also be acceleration sensors.
  • the acceleration sensors 10 must be arranged in the measuring device 1 in such a way that they detect acceleration components in directions other than those of the acceleration sensors 9.
  • rotation rate sensors or differential acceleration sensors can also be used, for example, to detect the rotary movement of the feeler device 2.
  • Rotation rate sensors for measuring the absolute rotational speed and differential acceleration sensors for detecting the differential acceleration are also known from the prior art, which is why a more detailed description thereof is not given here.
  • rotation rate sensors utilizing the Coriolis effect are known from DE-Cl-198 31 594 or DE-Cl-198 32 906.
  • a differential acceleration sensor is disclosed for example in EP-B1-0 557 034.
  • the exemplary embodiment of the measuring device 1 further comprises a display device 4, an interface 7, a main switch 5 and a switch 6 for resetting the position data.
  • the switch 6 the current position data of the measuring device 1 can, if necessary, be set to an initial value, i.e. in particular a zero point.
  • the display device 4 provides the user with the position data determined by the evaluation unit 11, ie, for example, the position data of the last approached Measuring point on the measuring object and the current position data of the measuring device, displayed.
  • the interface 7 which is preferably designed as an infrared interface, the position data determined by the evaluation unit 11 and optionally also the measurement signals of the sensors 9, 10 can be transmitted to external devices (not shown), where for example a further evaluation and / or the transmitted signals can be stored.
  • the main switch 5 provided on the housing 3 of the measuring device 1 serves to switch the connection of the measuring device 1 to a power supply 12 on and off.
  • the power supply 12 can be provided both internally and externally.
  • the power supply 12 is preferably implemented by batteries or accumulators provided in the housing 3.
  • the position data are optionally reset to a position zero point by actuating the corresponding switch 6. Then a desired measurement point on the surface of the measurement object to be measured is approached by means of the probe device 2 of the measurement device 1.
  • the sensors 9, 10 generate corresponding measurement signals from the movement of the measurement device 1, from which the evaluation unit 11 continuously calculates the current position data of the measurement device from several differential equations by integrating the system as described above.
  • the pushbutton device 2 sends a signal to the evaluation unit 11 when the first measuring point is touched on the surface of the measurement object.
  • the evaluation unit 11 holds the current position data, which it derives from the measurement signals the sensors 9, 10 has just calculated, and stores them as first position data in a storage device (not shown) of the measuring device.
  • the recorded and stored position data of the first position are displayed in parallel in a corresponding field of the display device.
  • the touch device 2 is not designed as a switch which emits a touch signal when the measurement object is touched, a corresponding touch signal must be entered by the user via an appropriate device (not shown) in order to Record and save position data of the first measuring position.
  • the position data of the first measuring position can also be set to zero at this time by actuating the switch 6.
  • the measuring device 1 is then removed with the probe device 2 from the first measuring point and moved in the direction of a second measuring point on the surface of the measuring object.
  • the sensors 9, 10 continuously send corresponding measurement signals to the evaluation unit 11, which continuously calculates the current position data of the measuring device therefrom.
  • the touch device 2 or the user When the second measurement point is touched on the measurement object, the touch device 2 or the user in turn generates a touch signal in order to record the current position data of the measurement device 1 and also to store it in the memory device.
  • the position data of the second measuring position can also be displayed on the display device 4.
  • the evaluation unit 11 also calculates, for example, the distance between the two measuring points and displays this calculated value as a third display on the display device 4.
  • the two position data can be, for example, that of the first and the last recorded position or that of the two last recorded positions.
  • all position data can be transmitted via the interface 7 to an external device, such as a computer, monitor, printer or the like. There the data can be further evaluated, processed, saved, displayed or printed out.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant de mesurer des objets en trois dimensions. Ledit procédé peut être utilisé de manière universelle, notamment pour mesurer des objets de grande taille, avec une grande précision. A cet effet, un point de mesure est détecté sur l'objet au moyen d'un dispositif palpeur (2). Un système de détection de mouvement (8) connecté de manière fixe au dispositif palpeur (2) et servant à détecter un déplacement du dispositif palpeur (2) et à produire des signaux de mesure appropriés, ainsi qu'une unité d'évaluation (11) permettent de déterminer la position présente du dispositif palpeur (2) sur la base des signaux de mesure produits depuis le système de détection de mouvement (8).
PCT/EP2001/004140 2000-04-12 2001-04-11 Procede et dispositif pour mesurer des objets en trois dimensions WO2001077610A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10018107.4 2000-04-12
DE2000118107 DE10018107A1 (de) 2000-04-12 2000-04-12 Vorrichtung und Verfahren zum dreidimensionalen Vermessen von Objekten

Publications (1)

Publication Number Publication Date
WO2001077610A1 true WO2001077610A1 (fr) 2001-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/004140 WO2001077610A1 (fr) 2000-04-12 2001-04-11 Procede et dispositif pour mesurer des objets en trois dimensions

Country Status (2)

Country Link
DE (1) DE10018107A1 (fr)
WO (1) WO2001077610A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2395316A1 (fr) * 2010-06-09 2011-12-14 Martin Knauer Dispositif de mesure de coordonnées, procédé de fonctionnement d'un dispositif de mesure de coordonnées et produit de programme informatique
WO2015132181A1 (fr) * 2014-03-03 2015-09-11 Stotz Feinmesstechnik Gmbh Dispositif de mesure d'objets

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023645B4 (de) * 2004-05-08 2006-09-07 Carl Mahr Holding Gmbh Computer kompatibler Längenmesstaster und Messtastersystem
US7281402B2 (en) 2004-05-10 2007-10-16 Speciality Minerals (Michigan) Inc. Method and apparatus for optimizing forging processes
DE102010035147B4 (de) 2010-08-23 2016-07-28 Jenoptik Industrial Metrology Germany Gmbh Meßvorrichtung
DE102012018580B4 (de) 2012-09-20 2015-06-11 Jenoptik Industrial Metrology Germany Gmbh Messvorrichtung und Messverfahren zur Inprozess-Messung an Prüflingen während eines Bearbeitungsvorganges an einer Bearbeitungsmaschine, insbesondere einer Schleifmaschine
DE102015007631A1 (de) * 2015-06-15 2016-12-15 Thomas Dinter Verfahren zur Erfassung einer Länge oder eines Umfangs eines Körperteils oder -segments mit Hilfe einer Sensoranordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045938A (en) * 1979-03-09 1980-11-05 Newall Electronics Ltd Dimension measuring device
DE3722646A1 (de) * 1987-07-09 1989-01-19 Ruhrgas Ag Verfahren zum molchen von erdverlegten rohrleitungen und rohrmolch zur durchfuehrung des verfahrens
US5440492A (en) * 1992-12-23 1995-08-08 Kozah; Ghassan F. Kinematically positioned data acquisition apparatus and method
EP0971308A1 (fr) * 1998-07-06 2000-01-12 Thomas Dr. Riedel Dispositif pour l'entrée de données à trois dimensions et procédé de numérisation d'objets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2045938A (en) * 1979-03-09 1980-11-05 Newall Electronics Ltd Dimension measuring device
DE3722646A1 (de) * 1987-07-09 1989-01-19 Ruhrgas Ag Verfahren zum molchen von erdverlegten rohrleitungen und rohrmolch zur durchfuehrung des verfahrens
US5440492A (en) * 1992-12-23 1995-08-08 Kozah; Ghassan F. Kinematically positioned data acquisition apparatus and method
EP0971308A1 (fr) * 1998-07-06 2000-01-12 Thomas Dr. Riedel Dispositif pour l'entrée de données à trois dimensions et procédé de numérisation d'objets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2395316A1 (fr) * 2010-06-09 2011-12-14 Martin Knauer Dispositif de mesure de coordonnées, procédé de fonctionnement d'un dispositif de mesure de coordonnées et produit de programme informatique
WO2015132181A1 (fr) * 2014-03-03 2015-09-11 Stotz Feinmesstechnik Gmbh Dispositif de mesure d'objets

Also Published As

Publication number Publication date
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