EP1392454A1 - Dispositif de captation d'images - Google Patents

Dispositif de captation d'images

Info

Publication number
EP1392454A1
EP1392454A1 EP02729888A EP02729888A EP1392454A1 EP 1392454 A1 EP1392454 A1 EP 1392454A1 EP 02729888 A EP02729888 A EP 02729888A EP 02729888 A EP02729888 A EP 02729888A EP 1392454 A1 EP1392454 A1 EP 1392454A1
Authority
EP
European Patent Office
Prior art keywords
camera
zoom lens
cuboid
recorded
beam path
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02729888A
Other languages
German (de)
English (en)
Inventor
Peter Stamm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1392454A1 publication Critical patent/EP1392454A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10861—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing of data fields affixed to objects or articles, e.g. coded labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C3/00—Sorting according to destination
    • B07C3/10—Apparatus characterised by the means used for detection ofthe destination
    • B07C3/14—Apparatus characterised by the means used for detection ofthe destination using light-responsive detecting means

Definitions

  • the invention relates to a device for recording images of at least the front and / or rear surfaces in the direction of movement, approximately perpendicular to the transport plane, of rectangular objects moving one after the other at a uniform speed on a transport path at a uniform speed.
  • Each camera has an optoelectronic CCD sensor and a zoom lens with fast zoom adjustment drive and auto focus.
  • at least one control unit for generating actuating signals for the camera / s and a sensor device for determining the position of the guader-shaped objects to be recorded at predetermined locations on the transport path are provided as a function of the path.
  • the camera / s are fixedly arranged above or to the side of the cuboid objects, oriented obliquely to the surface to be recorded.
  • Rectangular objects are automatically sorted and distributed according to the distribution information on the surface, in most cases the recipient addresses or barcode labels, in appropriate facilities.
  • the cuboid objects are aligned on a transport path at a relatively high speed of e.g. 2m / sec at times very small distances between the cuboid objects past the image recording device, which makes the recorded images available to an OCR reader.
  • the fast zoom adjustment drive can be controlled by the control device such that the imaging scale is always the same regardless of the previously measured height of the object surface containing the distribution information.
  • the zoom adjustment drive contains a linear motor (Patent Abstracts of Japan vol. 1997, no. 01, January 31, 1997 & JP 08 248291 A (Sony Corp.), September 27, 1996) ,
  • the cameras must be directed obliquely from above or to the side of the cuboid objects, otherwise the block-shaped neighboring objects block the view.
  • the invention is therefore based on the object of providing a generic device for image recording with which the relatively large areas of the moving approximately cuboid objects can be recorded with obliquely arranged line cameras without distortion.
  • the zoom lens can be controlled so that the side surface facing the camera is also scanned.
  • the line sensor in the camera at an angle to the lens plane in such a way that the line sensor plane is approximately perpendicular or parallel to the surface of the cuboid object to be recorded when the camera is inclined.
  • Control up to the respective item height is also possible if the item height information is available.
  • a lighting device in the camera beam path close to the object, in the center of which there is a deflection mirror. This deflects the camera beams to the camera that is not in the beam path of the lighting device.
  • the luminous flux reaches the surface to be recorded largely unhindered.
  • FIG. 1 shows a schematic side view of a device for image recording
  • Front surface of a cuboid object with representation of the CCD line sensor perpendicular and oblique to the lens axis, 3 shows a schematic side view with lighting.
  • a driven conveyor belt 1 as a transport path on which cuboid objects 2, 3 are transported at a fixed minimum distance at a constant speed from left to right (arrow direction).
  • the conveyor belt 1 there are two cameras 4, 7, each of which has a zoom lens 5, 8 with an adjustment drive and an optoelectronic CCD line sensor 6, 9.
  • the front camera 4 in the transport direction looks obliquely downwards at an angle of approx. 45 ° onto the front surfaces moved past and the camera 7 in the rear transport direction looks obliquely downwards at an angle of approx. 45 ° onto the rear sides of the cuboid objects 2, 3 ,
  • a light barrier and a rotary pulse generator are not shown.
  • the light barrier detects the passage of the front and rear edges of the cuboid objects at a fixed location, and with the help of the rotary pulse encoder, which detects the movement of the conveyor belt, it can then be determined exactly at what times the lower edges
  • the start time In order to accelerate the zoom movement from 0 to the adjustment speed, the start time must be
  • the adjustment path of the zoom lens for each object must be designed uniformly to a height that corresponds at least to the height of the largest cuboid object 2, 3.
  • the thickness of a scanned line is larger than in the case of a camera that is not arranged obliquely, so that overlaps occur at the edges. In addition, there are blurs / distortions.
  • the CCD sensor plane is inclined, as can be seen in FIG. 2, in such a way that it is oriented approximately perpendicular to the surface. Then the scanned line has the thickness as with a camera without inclination and for the sharpness over the line thickness the Scheimpflug condition is approximately reached.
  • the inclination of the sensor parallel to the object surface to be scanned is also possible, but the sharpness is less over the line thickness.
  • FIG 3 a favorable lighting is shown.
  • a channel mirror headlight 10 in the cuboid-shaped object close to the camera beam path. So that the channel mirror headlight 10 is not covered by the camera 7, there is a relatively small deflection mirror 11 in the center of the channel mirror headlight 10, which redirects the reception beams to the camera 7, which are in a non-disturbing position.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Studio Devices (AREA)
  • Image Input (AREA)

Abstract

L'invention concerne un dispositif de captation d'images d'au moins les surfaces d'objets (2, 3) de forme carrée déplacés devant au moins une caméra (4, 7) individuellement, l'un après l'autre sur une bande de transport (1), lesdites surfaces se trouvant, dans le sens de déplacement, respectivement à l'avant et à l'arrière et étant sensiblement perpendiculaires au plan de transport et transversales par rapport au sens de transport. Chaque caméra (4, 7) placée au-dessus ou à côté des objets comporte un capteur à lignes optoélectronique et un objectif zoom (5, 8) pourvu d'un dispositif d'entraînement de réglage de zoom rapide et d'un système autofocus. Le dispositif d'entraînement de réglage de l'objectif zoom (5, 8) peut être commandé de telle sorte que l'image de la surface devant être captée est effectivement captée dans chaque ligne avec sensiblement la même amplification latérale, avec prise en compte de la position de l'objet (2, 3) de forme carrée, de la vitesse de transport et de l'angle du chemin optique de la caméra par rapport à la surface dont l'image doit être captée. Une fois le processus de balayage correspondant terminé, l'objectif zoom (5, 8) est ramené dans sa position initiale respective.
EP02729888A 2001-05-16 2002-05-14 Dispositif de captation d'images Withdrawn EP1392454A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10124054 2001-05-16
DE10124054 2001-05-16
PCT/DE2002/001735 WO2002092246A1 (fr) 2001-05-16 2002-05-14 Dispositif de captation d'images

Publications (1)

Publication Number Publication Date
EP1392454A1 true EP1392454A1 (fr) 2004-03-03

Family

ID=7685149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02729888A Withdrawn EP1392454A1 (fr) 2001-05-16 2002-05-14 Dispositif de captation d'images

Country Status (4)

Country Link
US (1) US7215363B2 (fr)
EP (1) EP1392454A1 (fr)
JP (1) JP2004519798A (fr)
WO (1) WO2002092246A1 (fr)

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US7478754B2 (en) 2003-08-25 2009-01-20 Symbol Technologies, Inc. Axial chromatic aberration auto-focusing system and method
US20060144899A1 (en) * 2004-12-30 2006-07-06 Hu Xiao P Jam detection apparatus and method for indexing of substrates and lead frames
US20060217148A1 (en) * 2005-03-23 2006-09-28 Eastman Kodak Company Camera phone with large sensor
EP1868650B1 (fr) 2005-04-15 2018-10-03 MacroGenics, Inc. Di-anticorps covalents et leurs utilisations
US7809158B2 (en) * 2005-05-02 2010-10-05 Siemens Industry, Inc. Method and apparatus for detecting doubles in a singulated stream of flat articles
DE502007002821D1 (de) * 2007-08-10 2010-03-25 Sick Ag Aufnahme entzerrter Bilder bewegter Objekte mit gleichmässiger Auflösung durch Zeilensensor
DE102007048679A1 (de) 2007-10-10 2009-04-16 Sick Ag Vorrichtung und Verfahren zum Aufnehmen von Bildern von auf einer Fördereinrichtung bewegten Objekten
US8502180B2 (en) * 2009-01-26 2013-08-06 Centre De Recherche Industrielle Du Quebec Apparatus and method having dual sensor unit with first and second sensing fields crossed one another for scanning the surface of a moving article
IT1403978B1 (it) * 2011-02-15 2013-11-08 Datalogic Automation Srl Metodo di acquisizione di immagini
IT1404187B1 (it) * 2011-02-28 2013-11-15 Datalogic Automation Srl Metodo per l'identificazione ottica di oggetti in movimento
KR101316539B1 (ko) * 2011-11-29 2013-10-15 주식회사 힘스 유기발광다이오드 이물검사기
WO2013190880A1 (fr) * 2012-06-21 2013-12-27 ソニー株式会社 Dispositif de commande d'imagerie, procédé de commande d'imagerie et programme
USD736657S1 (en) * 2013-11-12 2015-08-18 Sick Ag Optoelectronic sensor
US10288555B2 (en) 2016-10-24 2019-05-14 Thermo Fisher Scientific, Inc. Tamper seal detection system and method of use
US10035617B1 (en) * 2017-02-01 2018-07-31 Thermo Fisher Scientific, Inc. Tamper seal detection system with conveyor belt and method of use
US10198653B2 (en) * 2017-04-26 2019-02-05 Sensors Incorporated System and method for performing production line product identification
US11908122B2 (en) 2017-04-26 2024-02-20 Sensors Incorporated System and method for performing production line product identification
CN114321627B (zh) * 2021-12-02 2022-09-13 中国科学院西安光学精密机械研究所 一种基于拼接技术的视场可调节成像系统
CN117119327B (zh) * 2023-08-24 2024-03-12 合肥埃科光电科技股份有限公司 一种多传感器相机及其偏差计算方法和安装方法

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DE3942932A1 (de) 1989-12-23 1991-06-27 Licentia Gmbh Verfahren zum verteilen von paketen o. ae.
US5534684A (en) * 1994-08-30 1996-07-09 Norand Corporation Portable optical reader with motion sensing system and method
FR2746330B1 (fr) * 1996-03-22 1998-04-17 Alcatel Postal Automation Syst Systeme d'acquisition d'images pour le tri de paquets
DE19639854A1 (de) * 1996-09-27 1998-06-10 Vitronic Dr Ing Stein Bildvera Verfahren und Vorrichtung zur Erfassung von auf potentiell großflächigen Gegenständen aufgebrachten, optisch erfaßbaren Informationen
ATE202865T1 (de) * 1997-09-17 2001-07-15 Datalogic Spa Gerät und verfahren zur feststellung der anwesenheit und der ausdehnung eines objekts
ATE196694T1 (de) * 1997-12-24 2000-10-15 Datalogic Spa Vorrichtung und verfahren zur fokusierung eines laserstrahls für optische codes
JP3186696B2 (ja) * 1998-05-28 2001-07-11 日本電気株式会社 光学式記号読取装置
DE19851284A1 (de) * 1998-11-06 2000-05-11 Siemens Ag Vorrichtung zur Bildaufnahme von Paketoberflächen

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Also Published As

Publication number Publication date
JP2004519798A (ja) 2004-07-02
US7215363B2 (en) 2007-05-08
US20030142211A1 (en) 2003-07-31
WO2002092246A1 (fr) 2002-11-21

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