EP1124651B1 - Dispositif pour prises de vues de surfaces de paquets - Google Patents

Dispositif pour prises de vues de surfaces de paquets Download PDF

Info

Publication number
EP1124651B1
EP1124651B1 EP99959227A EP99959227A EP1124651B1 EP 1124651 B1 EP1124651 B1 EP 1124651B1 EP 99959227 A EP99959227 A EP 99959227A EP 99959227 A EP99959227 A EP 99959227A EP 1124651 B1 EP1124651 B1 EP 1124651B1
Authority
EP
European Patent Office
Prior art keywords
parcel
camera
parcels
heights
lens
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.)
Expired - Lifetime
Application number
EP99959227A
Other languages
German (de)
English (en)
Other versions
EP1124651A1 (fr
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
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP1124651A1 publication Critical patent/EP1124651A1/fr
Application granted granted Critical
Publication of EP1124651B1 publication Critical patent/EP1124651B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 package surfaces according to the preamble of claim 1.
  • Parcels are automatically sorted and distributed according to the distribution information on the surface, in most cases the recipient addresses, in appropriate facilities.
  • the packets are guided on a transport device at a relatively high speed of approx. 2 m / sec with sometimes very small distances between the packets past the device for image recording, which makes the recorded images available to an OCR reader. Since the height of the packages fluctuates greatly, the optical system of the image recording device must be adapted to the different distances between the camera and the package surfaces in very short time intervals so that the images to be evaluated do not have any quality fluctuations.
  • the image sharpness was therefore automatically adapted to the different distances between the package surface and the image recording device.
  • the distance was measured with a height sensor known per se, for example a laser sensor or a light barrier line.
  • the image sharpness was then adjusted accordingly by lens shifting in an adjustable lens of an image recording device located vertically above the package (EP-A-0796 671) or the image plane receiver, for example a CCD line sensor, was moved in the direction of the optical axis shifted towards the lens to create a sharp image.
  • the lighting which is usually integrated in the scanner, shines obliquely on the package, at an angle in the transport direction.
  • 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 object of the invention specified in claim 1 is to provide a device for image recording of packet surfaces for recognizing the distribution information, such as recipient names and addresses, located on the packet surface, which illuminates the packets with a consistently high resolution for packets of different heights, that the package surface captured by the camera with the distribution information is always evenly and shadow-free illuminated at different package heights.
  • the distribution information such as recipient names and addresses
  • the side lighting and the correspondingly selected light cross-sections, light distribution and beam direction guarantee shadow-free illumination of the package surface in any case.
  • the packages are transported on tilting trays 2, conveyor belts are also possible in the direction indicated by the arrow at a speed of> 1.7 m / s.
  • the distances between the packages 1 can be 150 mm and smaller be.
  • they pass two sensors 3 for package height measurement mounted above them, for example ultrasonic sensors.
  • a side light curtain can also be used.
  • the packets 1 arrive in the recording area of a camera 4 mounted above the packets with a zoom lens 5 and auto focus.
  • the camera 4 has a CCD diode line that scans the package surface during transport.
  • the zoom lens 5 is driven by a fast linear motor 6 which is controlled by a control device 7, to which the sensors 3 for measuring the package height are also connected.
  • the linear motor 6 is controlled by the control device 7 such that the imaging scale is always the same with high resolution, regardless of the packet height.
  • a light barrier which is also connected to the control device 7 and reports the occupancy of the tilting shells 2 with packages 1.
  • two lighting devices 8 are mounted laterally above the packages 1, which illuminate the packages 1 at an angle. The direction of light, the luminous area and the light distribution of the lighting devices 8 are selected such that the package surface detected by the camera 4 with the distribution information at the different package heights is always illuminated in a shadow-free and uniform manner.

Landscapes

  • Sorting Of Articles (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Image Input (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Claims (1)

  1. Installation pour la prise de vues de surfaces de paquets qui contiennent des informations de distribution, comprenant une caméra (4), dirigée à la verticale de la surface de paquets à enregistrer, qui contient un détecteur CCD et un objectif de prise de vues (5), au moins un détecteur (3) pour mesurer la hauteur des paquets et un dispositif de commande (7) pour produire des signaux de réglage pour la caméra (4) en fonction de la hauteur de paquets mesurée et un moyen de transport pour transporter en continu les paquets devant la caméra, la caméra (4) présentant en tant qu'objectif de prise de vues (5) un objectif à focale variable avec un entraînement de réglage du zoom (6) rapide et étant aussi munie d'un autofocus, l'entraînement de réglage de zoom rapide (6) pouvant être commandé par le dispositif de commande (7) de telle manière que l'échelle de reproduction soit toujours identique, indépendamment de la hauteur préalablement mesurée de la surface de paquets contenant l'information de distribution, caractérisé en ce que deux dispositifs d'éclairage (8) ou plus sont placées transversalement à la direction de transport et latéralement par rapport aux paquets et envoient obliquement des rayons sur les paquets d'un profil transversal tel et d'une répartition de lumière telle que la surface de paquets enregistrée par la caméra est toujours éclairée de façon régulière et sans ombres quelle que soit la hauteur des paquets.
EP99959227A 1998-11-06 1999-11-02 Dispositif pour prises de vues de surfaces de paquets Expired - Lifetime EP1124651B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19851284 1998-11-06
DE19851284A DE19851284A1 (de) 1998-11-06 1998-11-06 Vorrichtung zur Bildaufnahme von Paketoberflächen
PCT/DE1999/003483 WO2000027549A1 (fr) 1998-11-06 1999-11-02 Dispositif pour prises de vues de surfaces de paquets

Publications (2)

Publication Number Publication Date
EP1124651A1 EP1124651A1 (fr) 2001-08-22
EP1124651B1 true EP1124651B1 (fr) 2003-01-29

Family

ID=7886960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99959227A Expired - Lifetime EP1124651B1 (fr) 1998-11-06 1999-11-02 Dispositif pour prises de vues de surfaces de paquets

Country Status (6)

Country Link
EP (1) EP1124651B1 (fr)
JP (1) JP2003503865A (fr)
CA (1) CA2349605C (fr)
DE (2) DE19851284A1 (fr)
IL (1) IL142902A0 (fr)
WO (1) WO2000027549A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002092246A1 (fr) * 2001-05-16 2002-11-21 Siemens Aktiengesellschaft Dispositif de captation d'images
US7385743B2 (en) 2001-10-16 2008-06-10 Accu-Sort Systems, Inc. Linear imager rescaling method
JP2005064633A (ja) * 2003-08-08 2005-03-10 Hitachi Ltd 帳票読取装置
ATE457500T1 (de) 2007-08-10 2010-02-15 Sick Ag Aufnahme entzerrter bilder bewegter objekte mit gleichmässiger auflösung durch zeilensensor
DE102007048679B4 (de) 2007-10-10 2025-03-13 Sick Ag Vorrichtung und Verfahren zum Aufnehmen von Bildern von auf einer Fördereinrichtung bewegten Objekten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044227A (en) * 1975-08-07 1977-08-23 The Upjohn Company Bar code reader
US4869813A (en) * 1987-07-02 1989-09-26 Northrop Corporation Drill inspection and sorting method and apparatus
US4782238A (en) * 1987-10-20 1988-11-01 Eastman Kodak Company Apparatus for generating edge position signals for use in locating an address element on a mailpiece
US4920255A (en) * 1988-10-31 1990-04-24 Stephen C. Gabeler Automatic incremental focusing scanner system
JPH02171883A (ja) * 1988-12-23 1990-07-03 Nec Corp 光学文字読取装置
JP3414040B2 (ja) * 1995-03-09 2003-06-09 ソニー株式会社 レンズ鏡筒
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

Also Published As

Publication number Publication date
IL142902A0 (en) 2002-04-21
WO2000027549A1 (fr) 2000-05-18
DE19851284A1 (de) 2000-05-11
EP1124651A1 (fr) 2001-08-22
DE59904191D1 (de) 2003-03-06
CA2349605C (fr) 2005-10-18
CA2349605A1 (fr) 2000-05-18
JP2003503865A (ja) 2003-01-28

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