DE102010053759A1 - Method for automatically checking periodic structures of e.g. twisted wire, involves providing image area larger such that periods of structures of commodities are detected, and determining parameters of commodities by evaluation unit - Google Patents
Method for automatically checking periodic structures of e.g. twisted wire, involves providing image area larger such that periods of structures of commodities are detected, and determining parameters of commodities by evaluation unit Download PDFInfo
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- DE102010053759A1 DE102010053759A1 DE201010053759 DE102010053759A DE102010053759A1 DE 102010053759 A1 DE102010053759 A1 DE 102010053759A1 DE 201010053759 DE201010053759 DE 201010053759 DE 102010053759 A DE102010053759 A DE 102010053759A DE 102010053759 A1 DE102010053759 A1 DE 102010053759A1
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- camera
- evaluation unit
- commodities
- goods
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- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
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- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0691—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of objects while moving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Stand der TechnikState of the art
Die vollautomatische Kontrolle mit Kameras zur Sicherung der Produktqualität ist heute Stand der Technik. Hierbei handelt es sich entweder um einzelne Objekte, die auf einer Fördereinrichtung an einer oder mehrere Kameras vorbei geführt werden oder um fortlaufende Bahnware, die kontinuierlich kontrolliert werden muss. Im ersten Fall triggert das fahrende Objekt über eine Lichtschranke oder ähnliches eine Kamera, so dass man pro Objekt ein Bild erhält. Im zweiten Fall erfolgt die Kontrolle meist über eine Zeilenkamera. Hierbei wird für kleine konstante Wegintervalle, die die Bahnware zurücklegt, jeweils ein Puls ausgelöst um eine Bildzeile quer zur Bewegungsrichtung zu erfassen. So erhält man ein lückenloses Abbild.The fully automatic control with cameras to ensure product quality is state of the art today. These are either individual objects that are guided past one or more cameras on a conveyor or continuous web material that has to be continuously monitored. In the first case, the moving object triggers a camera via a light barrier or the like, so that one image per object is obtained. In the second case, the control is usually done via a line scan camera. In each case, a pulse is triggered for small, constant path intervals traveled by the web material in order to capture a picture line transversely to the direction of movement. So you get a complete picture.
Bei der Kontrolle aufeinanderfolgender Objekte gibt es verschiedene Möglichkeiten, den separaten Trigger zu ersetzen: Zum einen kann man eine Aufnahme des gesamten Kamerabildes auslösen, indem man eine Teilmenge der Sensorelemente mit sehr hoher Frequenz erfasst, auswertet und zu dem Zeitpunkt, zu dem das Objekt ins Bild kommt, eine Komplettaufnahme macht. Durch die CMOS-Technologie ist dies technisch machbar, vgl.
Bei scheibenförmigen Objekte, die dicht hintereinander auf einem Förderband liegen, ist es schwierig, pro Objekt einen Trigger zu erzeugen. Deshalb wird in
Um periodische Bewegungen zu analysieren, gibt es seit langem das Stroboskop. Hierbei wird ein sich bewegendes Objekt immer in der gleichen Phasenlage blitzartig beleuchtet. So entsteht für den Betrachter ein stehendes Bild. So können langsame Bewegungen, die einer schnellen Bewegung überlagert sind, sichtbar gemacht werden. In
In
Beschreibung der AufgabeDescription of the task
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu finden, mit dem die Parameter von fortlaufender Ware, welche periodische Strukturen aufweist, so zu erfassen, dass man für jede Periode einen entsprechenden Satz von Parameter, insbesondere Amplitude und Wellenlänge, erhält. Die sonst übliche Verwendung einer Zeilenkamera hat einen entscheidenden Nachteil, wenn die Wellenlänge mit hoher Genauigkeit ermittelt werden soll. Um ein massstabsgetreues Bild zu erhalten, muss die Zeilenkamera mit einem Geber getriggert werden, der synchron zur Bewegung der Ware Triggersignale auslöst. Ein eventueller Schlupf zwischen der Bewegung der Ware und der Bewegung, die die Zeilenkamera, triggert führt zu einer Verfälschung des Messergebnisses für die Wellenlänge. Wenn die Gefahr eines Schlupfes besteht, ist die Zeilenkamera unbrauchbar. Die Verwendung eines Initiators scheidet ebenfalls aus, wenn die Objektgeometrie hierfür zu ungünstig ist, wie dies zum Beispiel bei Seilen oder verdrillten Drähten der Fall ist.The invention has for its object to find a method by which the parameters of continuous product, which has periodic structures to capture so that for each period receives a corresponding set of parameters, in particular amplitude and wavelength. The usual use of a line camera has a decisive disadvantage when the wavelength is to be determined with high accuracy. In order to obtain a true-to-scale image, the line scan camera must be triggered with a sensor which triggers trigger signals synchronously with the movement of the goods. A possible slip between the movement of the goods and the movement, which triggers the line scan camera, leads to a falsification of the measurement result for the wavelength. If there is a risk of slippage, the line scan camera is unusable. The use of an initiator is also eliminated if the object geometry is too unfavorable for this purpose, as is the case, for example, with ropes or twisted wires.
Kameras, die nach dem in
Beschreibung der ErfindungDescription of the invention
Wenn der Bildbereich (
Zeigt sich die periodische Struktur nur in einer Ebene, muss die Kamera (
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10119498 [0002] DE 10119498 [0002]
- DE 102009040649 [0003] DE 102009040649 [0003]
- DE 10017162 [0004] DE 10017162 [0004]
- DE 102006000946 [0005, 0007] DE 102006000946 [0005, 0007]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010053759 DE102010053759A1 (en) | 2010-12-08 | 2010-12-08 | Method for automatically checking periodic structures of e.g. twisted wire, involves providing image area larger such that periods of structures of commodities are detected, and determining parameters of commodities by evaluation unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010053759 DE102010053759A1 (en) | 2010-12-08 | 2010-12-08 | Method for automatically checking periodic structures of e.g. twisted wire, involves providing image area larger such that periods of structures of commodities are detected, and determining parameters of commodities by evaluation unit |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102010053759A1 true DE102010053759A1 (en) | 2012-06-14 |
DE102010053759A8 DE102010053759A8 (en) | 2012-08-30 |
Family
ID=46144244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201010053759 Withdrawn DE102010053759A1 (en) | 2010-12-08 | 2010-12-08 | Method for automatically checking periodic structures of e.g. twisted wire, involves providing image area larger such that periods of structures of commodities are detected, and determining parameters of commodities by evaluation unit |
Country Status (1)
Country | Link |
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DE (1) | DE102010053759A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10017162A1 (en) | 2000-03-03 | 2001-09-27 | Xion Gmbh | Stroboscopic recording and reproduction of repetitive processes involves forming image information summations from successive exposures in memory |
DE10119498C1 (en) | 2001-04-20 | 2002-01-24 | Mikrotron Gmbh | Image recording release device for digital camera uses digital signals provided by freely selected image sensors of CMOS image sensor semiconductor element |
DE102006000946A1 (en) | 2006-01-07 | 2007-07-12 | Isra Vision Systems Ag | Method and system for optical inspection of a periodic structure |
DE102009040649A1 (en) | 2008-09-11 | 2010-05-20 | Schott Ag | Method and apparatus for generating digital frames of disc-shaped elements in a manufacturing process |
-
2010
- 2010-12-08 DE DE201010053759 patent/DE102010053759A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10017162A1 (en) | 2000-03-03 | 2001-09-27 | Xion Gmbh | Stroboscopic recording and reproduction of repetitive processes involves forming image information summations from successive exposures in memory |
DE10119498C1 (en) | 2001-04-20 | 2002-01-24 | Mikrotron Gmbh | Image recording release device for digital camera uses digital signals provided by freely selected image sensors of CMOS image sensor semiconductor element |
DE102006000946A1 (en) | 2006-01-07 | 2007-07-12 | Isra Vision Systems Ag | Method and system for optical inspection of a periodic structure |
DE102009040649A1 (en) | 2008-09-11 | 2010-05-20 | Schott Ag | Method and apparatus for generating digital frames of disc-shaped elements in a manufacturing process |
Also Published As
Publication number | Publication date |
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DE102010053759A8 (en) | 2012-08-30 |
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R005 | Application deemed withdrawn due to failure to request examination |