WO2009056303A1 - Verfahren und messgerät zur berührungslosen erfassung des räumlichen formverlaufs von bauteilen - Google Patents
Verfahren und messgerät zur berührungslosen erfassung des räumlichen formverlaufs von bauteilen Download PDFInfo
- Publication number
- WO2009056303A1 WO2009056303A1 PCT/EP2008/009149 EP2008009149W WO2009056303A1 WO 2009056303 A1 WO2009056303 A1 WO 2009056303A1 EP 2008009149 W EP2008009149 W EP 2008009149W WO 2009056303 A1 WO2009056303 A1 WO 2009056303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring
- fork
- measuring device
- component
- light
- Prior art date
Links
Classifications
-
- 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
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2433—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring outlines by shadow casting
-
- 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
Definitions
- the invention relates to a method for non-contact detection of the spatial shape curve of components, in particular of bent tubes, wires, bar stock, semi-finished products, sheets or the like. according to the preamble of claim 1 and a measuring device therefor according to the preamble of claim 16.
- the data acquisition on the test object is carried out using known 3D measuring systems, specifically via a mechanical probe or via a probing head operating with a laser light line. Even simple infrared light barriers are in use.
- Both touch probes are mechanically connected to a measuring arm, which detects the coordinates in relation to the measuring table.
- the 3D coordinates X - Y - Z are determined via an axis mechanism (the so-called measuring arm) with incremental encoders in conjunction with a PC.
- the return of the determined measurement data z. B. to a pipe bending machine with corresponding bending angle setpoint changes already known. However, in this case only a random check with subsequent bending angle change is provided and the measurements are usually carried out only sporadically or according to the end customer predetermined amount in a lot size.
- the present invention has the object to provide a method with which on the one hand a comprehensive review of preferably curved components directly on a machine, preferably a bending machine with continuous setpoint adjustment (adaptive control loop) and on the other hand, an individual detection of the spatial form or the spatial course of preferably so-called master parts or prototypes is possible in order to be able to transfer their shape progression to a production process. Furthermore, this is to create a suitable measuring device, which also for quality control of a running Production of z. B. bent tubes can be used.
- each component illuminates progressively along its path through at least one light transmitter, and thereby the light emitted by the light source
- each component is illuminated progressively along its course on both sides by at least one light emitter and at the same time the shadows caused by the component to be detected on both sides by at least one light receiver.
- a process control is suitable in which at least one light transmitter and the at least one light receiver associated therewith in fork legs of a type
- Measuring process along the course of a component by means of this non-contact cross-fork leg is measured.
- the method according to the invention can be carried out particularly advantageously both with a hand-held and also with a type of measuring arm guided on a measuring arm, namely in order to be able to record the spatial data of a component, the type measuring fork without settling them, with or without measuring arm, continuously over the examinee guided, whereby its geometric data, actually the center axis, are detected.
- the z. B. can reach down to a wire with a few tenths of a millimeter diameter, the detection can advantageously be done all around and an indication of the diameter is not given.
- the diameter can also be detected and calculated for the first case by a special measurement of the measuring fork guided around the tube.
- LEDs light-emitting diodes
- CCDs charge-coupled lines
- the light transmitter preferably the LED's are sequentially driven, and the light receiver, preferably CCD 's, read out in parallel.
- the method according to the invention it is also expedient that it is operated with an integrated own energy source such as a rechargeable battery.
- the type of measuring fork is operated with the aid of an integrated microprocessor and DSP electronics and optical sensors such that trigonometric functions-each based on the principle of shadow casting-have a 3D position Center axis of each component to be measured within a measurement field is detected, in which case the computing system generates a vectorial representation of the component to be measured.
- the kind of measuring fork which may occur in particular when it is guided by a hand, is corrected primarily automatically via the path, acceleration and / or angular deviation.
- the 3D data of the component measured by the type of measuring fork may be transmitted to a higher-level system such as PC, IPC, notebook, Palm or similar systems wirelessly or by means of at least one cable.
- a higher-level system such as PC, IPC, notebook, Palm or similar systems wirelessly or by means of at least one cable.
- This solution offers z. B. then when the inventive method is performed with a meh ' Rachsigen electromechanical measuring arm. This measuring arm is then wired with the Art Measuring fork connected and connected as a unit to a higher-level system such as PC, etc. In this case, the energy supply can also be external.
- the navigation of the type measuring fork can be done in three-dimensional space without the measuring arm by means of integrated acceleration, rotation and magnetic field sensors based on a navigation system formed therewith.
- the type measuring fork preferably along the longitudinal extent of a component to be measured, as along a multiply bent tube or the like, which serves in particular as a reference part, moves and its spatial course is stored to the result then to forward to a bending machine.
- Processing processes within a process such as Equipment for bending workpieces such as pipes or the like. to control.
- the type measuring fork is designed such that it emits an acoustic signal when the main measuring field is left by the manual component of the component to be measured.
- a measuring device for contactless detection of the spatial shape curve of components in particular of bent tubes, wires, bar stock, semi-finished products, sheets or the like.
- Particularly suitable is one which is in the form of a measuring fork, which at least one light emitter and at least has a light receiver.
- Luminescence diodes including lasers - and charge-coupled lines (CCDs) - including CCD chamber systems - have proved successful as light emitters.
- the measuring device itself expediently consists of an ergonomically designed, fork-shaped shell housing, in which in addition a microprocessor, a DSP electronics and optionally a separate energy source such as an accumulator are integrated.
- a microprocessor e.g., a DSP electronics
- a separate energy source e.g., a accumulator
- the training of the measuring fork expediently such that a vectorial representation of the component to be measured can be read.
- Measuring device of the respective imaginary central axis of the component to be measured performs a correction, and especially on the distance, acceleration and / or angular deviation.
- the measuring device is designed in such a way that in particular the 3D data of the component measured with the fork legs can be transmitted wirelessly or by means of at least one cable connection to a higher-level system such as PC, IPC, notebook, Palm or similar systems, where a USB sticker is well suited for this, if you provide an appropriate connection to the meter.
- a higher-level system such as PC, IPC, notebook, Palm or similar systems, where a USB sticker is well suited for this, if you provide an appropriate connection to the meter.
- the 3D data recorded with the fork legs can be stored separately and, with this data, in particular machining processes within the process sequence, such as installations for bending workpieces such as pipes or the like. specifically controllable.
- the fork-shaped shell housing of the measuring device has purpose-bound control buttons and at least one signal generator which sounds an acoustic signal, especially if the forked measuring device differs from the main measuring field of the component to be measured in a manual operation of the fork-shaped measuring device. This will make that the Acoustically asked measuring device leading person to correct its routing in favor of the imaginary center line.
- a light receiver preferably in the form of a charge-coupled line
- Light emitter preferably in the form of light-emitting diodes
- Fig.l is a simplified representation of communication • Vector of the invention
- FIG. 2 shows a measuring fork head shown in a longitudinal section with measuring fields of the measuring device according to the invention
- FIG. 3 shows the measuring fork head according to FIG. 2 with a sketch of an LED arrangement
- FIG. 4 shows the measuring fork head according to FIG. 2 with a sketch for a correction of a CCD position
- FIG. 5 shows the measuring fork head according to FIG. 2 with the sketch of a shadow cast by an introduced object on one side.
- the communication graph shown in simplified form in Fig.l shows the designated measuring device 1 according to the invention with a measuring fork head 2, in which measuring fields 3 are indicated.
- the data acquired by the measuring device 1 can be either wirelessly - indicated at 4 - indicated by cable at 5 - or by means of a USB sticker 6 z. B. to a notebook 7 and from this or directly to a processing machine, such as a pipe bending machine. 8 are transmitted.
- the measuring fork head 2 is shown in detail in a longitudinal section, and this forms the fork-shaped working end of a shell housing 9, which merges into an ergonomically designed handle 10.
- the shell housing 9 is made of plastic, with a suitable light metal is also possible. It is important that the housing material of the measuring fork head 2 only minimally reflected.
- the measuring fork head 2 has fork legs 11 and 12, whose essential leg portions 13 and 14 extend at right angles to each other and as a light receiver CCD's 15 and 16 in line form.
- the leg portions 13 and 14 also have end portions 17 and 18 which are approximately parallel to each other, in each of which three light emitters in the form of LEDs 19 and 20 are housed.
- the measuring fields 3 sketched in FIG. 2 in the measuring fork head 2 are highlighted as follows: In the regions designated by 21, a test object is detected only by one or more LEDs of a fork side. Is it z. B. only one LED, so only an object detection, but no position detection is possible. With two or three LEDs, however, a very rough detection of the position is possible. Normally, however, the areas 21 do not serve the measurement.
- a test object is detected by at least one LED of each side.
- the expected accuracy may be sufficient for one measurement.
- a signal generator (not shown) is provided, which causes an acoustic warning sound sounds when leaving the designated by 23 safe main field by the user.
- between two and five LEDs are involved in the illumination of the measuring object edges. The achieved accuracy can therefore fluctuate accordingly.
- the illumination of the measuring object or its edges takes place through all six LEDs 19 and 20, which are then evaluated by the measuring device via their shadow cast on the CCDs 15 and 16. With a corresponding parameterization, the measurement accuracy within the central region of the main operating field 23 is constant.
- the present measuring system of the measuring device 1 consists of three individual measuring forks according to the principle of shadow casting. These are switched sequentially and an average of the measured values is formed.
- the basic principle of a simple measuring fork before namely a two-sided illumination of a specimen with ideally point-like light sources and an evaluation of the cast shadow by optical sensors.
- the LEDs 19 and 20 are used for illumination and CCD lines 15 and 16 are used to record the shadow.
- the lighting system was simply tripled, with the orientation chosen to maintain the sensor system. Due to the sequential modulation of the LED's 19 and 20 and the parallel reading of the CCD's 15 and 16, a high accuracy can be obtained despite the inferior compared to a laser light source. It also drastically reduces costs.
- the optical paths precisely. As there would be the dimensions of all the components, the length and position of the photosensitive area on the CCDs 15 and 16 and the angles of emission of the LEDs 19 and 20.
- the wavelength of the LED's 19 and 20 should be in one of the sensitivity maxima of the CCD's 15 and 16 and should also be clearly visible to humans. In this case, the highest possible light output with homogeneous radiation must be achieved, and the radiation angle must match the system.
- the CCD's 15 and 16 it is advantageous if they are as simple as possible in the modulation and thereby have a high resolution and the largest possible line length. Moreover, it is advantageous if their sensitivity can be varied within a wide range, which z. B. is to accomplish well by an electronic shutter.
- the mechanical construction of the shell housing 9 it is provided that as narrow as possible a light path to the CCD 's to reduce interference from ambient light
- FIG. 5 the shadow is shown by an inserted object 29 on one side, from which it can be seen that on the CCD surface of the CCD line 16 actually three sufficiently different shadow images are obtained.
- Two sensor plates can be seen in FIGS. 2-5, namely from the respective CCD line 15 or 16 and in each case one attached gyroscope 30 or 31 (eg FIG.
- the outsourcing of the gyroscopes 30, 31 on these boards significantly simplifies the assembly work for the 3-axis system.
- acceleration sensor path-dependent
- a gyroscope as a type Kreiselkompas, responsible for x, y, z position data in space provided.
- a navigation system obtained thereby which comes into play, in particular in the case of a handheld guide of the measuring device, works on the basis of acceleration, rotation and magnetic field sensors.
- the invention in the production and processing z. B. of bent tubes and solid materials are used advantageously, in which case the system according to the invention can serve the detection of master parts and prototypes as well as the quality control of a current production.
- the measuring fork. 1 without dropping them, with or without a measuring arm, simply guiding over the test object, whereby its geometrical data, more precisely its central axis, are recorded.
- the invention can also be advantageously used for measuring turned parts within a lathe or a turning center.
- the test specimen is set in rotation and the measuring fork is moved at a constant feed over the rotating part.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08845757A EP2208014A1 (de) | 2007-10-30 | 2008-10-30 | Verfahren und messgerät zur berührungslosen erfassung des räumlichen formverlaufs von bauteilen |
BRPI0818122 BRPI0818122A2 (pt) | 2007-10-30 | 2008-10-30 | Método e aparelho de medição para o registro sem contato da forma espacial de componentes |
MX2010004784A MX2010004784A (es) | 2007-10-30 | 2008-10-30 | Procedimiento y aparato de medicion para la deteccion sin contacto del desarrolloespacial de la forma de componentes. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710052033 DE102007052033A1 (de) | 2007-10-30 | 2007-10-30 | Verfahren und Messgerät zur berührungslosen Erfassung des räumlichen Formverlaufs von Bauteilen |
DE102007052033.8 | 2007-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009056303A1 true WO2009056303A1 (de) | 2009-05-07 |
Family
ID=40251545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/009149 WO2009056303A1 (de) | 2007-10-30 | 2008-10-30 | Verfahren und messgerät zur berührungslosen erfassung des räumlichen formverlaufs von bauteilen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2208014A1 (de) |
BR (1) | BRPI0818122A2 (de) |
DE (1) | DE102007052033A1 (de) |
MX (1) | MX2010004784A (de) |
RU (1) | RU2460036C2 (de) |
WO (1) | WO2009056303A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009052296A1 (de) | 2009-11-09 | 2011-05-19 | Rosenberger Ag | Vorrichtung zur Positionsbestimmung |
EP2708845B1 (de) * | 2012-09-13 | 2017-05-31 | General Electric Technology GmbH | Verfahren und System zum Bestimmen der Rohrqualität |
US9491412B2 (en) | 2012-09-13 | 2016-11-08 | General Electric Technology Gmbh | Method and system for determining quality of tubes |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944798A (en) | 1974-04-18 | 1976-03-16 | Eaton-Leonard Corporation | Method and apparatus for measuring direction |
US4880991A (en) * | 1987-11-09 | 1989-11-14 | Industrial Technology Institute | Non-contact dimensional gage for turned parts |
WO1992020995A1 (en) * | 1991-05-16 | 1992-11-26 | Cruickshank Partners | Apparatus for measuring the profile of a moving object |
EP0554920A2 (de) | 1989-05-02 | 1993-08-11 | Eaton Leonard, Inc. | Optische Sonde |
US6480290B1 (en) | 2000-01-31 | 2002-11-12 | Carnegie Mellon University | Method and apparatus to measure the cross-sectional area of an object |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5537919A (en) * | 1978-09-11 | 1980-03-17 | Ngk Insulators Ltd | Automatic outer configuration measurement device |
US4576482A (en) * | 1979-09-07 | 1986-03-18 | Diffracto Ltd. | Electro-optical inspection |
US4849643A (en) * | 1987-09-18 | 1989-07-18 | Eaton Leonard Technologies | Optical probe with overlapping detection fields |
-
2007
- 2007-10-30 DE DE200710052033 patent/DE102007052033A1/de not_active Withdrawn
-
2008
- 2008-10-30 EP EP08845757A patent/EP2208014A1/de not_active Withdrawn
- 2008-10-30 BR BRPI0818122 patent/BRPI0818122A2/pt not_active Application Discontinuation
- 2008-10-30 WO PCT/EP2008/009149 patent/WO2009056303A1/de active Application Filing
- 2008-10-30 MX MX2010004784A patent/MX2010004784A/es not_active Application Discontinuation
- 2008-10-30 RU RU2010117017/28A patent/RU2460036C2/ru not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3944798A (en) | 1974-04-18 | 1976-03-16 | Eaton-Leonard Corporation | Method and apparatus for measuring direction |
US4880991A (en) * | 1987-11-09 | 1989-11-14 | Industrial Technology Institute | Non-contact dimensional gage for turned parts |
EP0554920A2 (de) | 1989-05-02 | 1993-08-11 | Eaton Leonard, Inc. | Optische Sonde |
WO1992020995A1 (en) * | 1991-05-16 | 1992-11-26 | Cruickshank Partners | Apparatus for measuring the profile of a moving object |
US6480290B1 (en) | 2000-01-31 | 2002-11-12 | Carnegie Mellon University | Method and apparatus to measure the cross-sectional area of an object |
Non-Patent Citations (1)
Title |
---|
See also references of EP2208014A1 * |
Also Published As
Publication number | Publication date |
---|---|
RU2460036C2 (ru) | 2012-08-27 |
RU2010117017A (ru) | 2011-12-10 |
BRPI0818122A2 (pt) | 2015-03-31 |
DE102007052033A1 (de) | 2009-05-07 |
MX2010004784A (es) | 2010-07-29 |
EP2208014A1 (de) | 2010-07-21 |
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