WO2004105967A1 - Dispositif d'imagerie - Google Patents

Dispositif d'imagerie Download PDF

Info

Publication number
WO2004105967A1
WO2004105967A1 PCT/NL2004/000380 NL2004000380W WO2004105967A1 WO 2004105967 A1 WO2004105967 A1 WO 2004105967A1 NL 2004000380 W NL2004000380 W NL 2004000380W WO 2004105967 A1 WO2004105967 A1 WO 2004105967A1
Authority
WO
WIPO (PCT)
Prior art keywords
row
mirrors
products
housing
image
Prior art date
Application number
PCT/NL2004/000380
Other languages
English (en)
Dutch (nl)
Inventor
Servaes Joordens
Robert Peters
Poppo Jan Wit
Original Assignee
Fps Food Processing Systems B.V.
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 Fps Food Processing Systems B.V. filed Critical Fps Food Processing Systems B.V.
Publication of WO2004105967A1 publication Critical patent/WO2004105967A1/fr

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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
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
    • 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

Definitions

  • the present invention relates to a device according to the preamble of claim 1.
  • Such a device is known from NL1013375, also of applicant. This describes in which manner the components from which the device has been assembled need to be positioned to be able to compose images of the products, which enable reliable sorting of the products. More in particular, in this arrangement, it was decided to image surface parts near the bearing parts of the products on the conveyor rollers, with the mirrors being placed directly next to the rollers. However, it has been found that the mirrors thus arranged quickly become soiled. Applicant has also sought to obviate this drawback, as described in WO00/27550.
  • the mirrors can adequately be kept clean, it cannot prevent the regular occurrence of hitches resulting from conveyance of too large products or non-singled products, for instance two smaller products which have still ended up in a single nest formed by two successive rollers so that the products get stuck between the mirrors.
  • a further problem is that, when constructing the beams, not only optical path lengths should be taken into account, but also the possibility of providing sorting rows next to one another, and, consequently, avoiding the crossing and, accordingly, covering of parts of beams.
  • the device according to the present invention has solved above-mentioned problems and is, for this purpose, characterized in that, by means of the system of mirrors, on each side of the row, two beams are led from the product to a single camera, while the image of a single product is composed of at least three surface strips.
  • angles of the beams coming directly from the products are evenly distributed over the two quadrants, formed by the vertical through the row, and located above the row, in particular that the angles in these quadrants are between 5° and 185°, more particularly that the two angles furthest apart are preferably in the range of 70° to 45° with the vertical.
  • the invention is characterized in that, for each beam, at least two mirrors are used.
  • the device is further characterized in that the lighting elements are metal vapor lamps which are provided symmetrically with respect to the row and the vertical plane, more particularly that the lamps are substantially tubular and are cased in a cylindrical casing transmitting the lighting which is at least partly flown through by a cooling fluid likewise transmitting the lighting.
  • the lamps are directed substantially parallel to the beams which are directed at the two angles furthest apart.
  • the mirrors are mounted on plates of which the two ends are connected, by means of a mortise and tenon clamped joint, with the two end plates, downstream and upstream, of the housing.
  • the tenon comprises a middle part, with a recess in the middle thereof, and with two edge ends with bends perpendicular to the middle part in the same direction, with the tenon being clampingly provided in a mortise in an end plate of the housing, with the recess over a cam-shaped curvature of a corresponding middle part of the mortise, and with the bends against contact edges on both sides of the middle part of this mortise.
  • Fig. 1 diagrammatically shows, for a first exemplary embodiment, the positioning of camera, mirrors and products for a single row;
  • Fig. 2 diagrammatically shows a situation for four rows next to one another utilizing the exemplary embodiment according to Fig. 1;
  • FIG. 3A and 3B diagrammatically show two further exemplary embodiments
  • Fig. 4 shows a perspective view of a housing for the device according to the invention
  • Fig. 5 shows a detail of the attachment of parts of the device according to the invention.
  • Fig. 1 diagrammatically shows a vertical cross section of a frame 1 in which the device according to the invention has been included, with the frame resting on a support of a sorting device (not drawn).
  • sorting devices are generally known, for instance from EP687508.
  • products P for instance apples
  • Fig. 1 shows, for a first exemplary embodiment, a cross section, namely perpendicular to a single row.
  • V represents a vertical plane through such a row.
  • plane V is a plane of symmetry.
  • a horizontal bridge 2 with a vertical column 3 thereon.
  • a camera 4 and support means for a number of mirrors of a system of mirrors are included.
  • beams from the surface of a rotating product are projected on the focal plane of the camera 4. Of these four beams, two are on one side and two are on the other side of the plane of symmetry V, symmetrically with respect to V.
  • first beam 100, 100', 100" and a second beam 200, 200', 200" are, in cross section, a first beam 100, 100', 100", and a second beam 200, 200', 200", and on the other side a first beam which is only designated by reference numeral 101 and which is symmetrical to the first beam on the one side, and a second beam with only reference numeral 201 which is symmetrical to the second beam on the one side.
  • the Figure shows how, on the one side, the first beam 100, successively via mirrors 10 and 20, and the second beam, via mirrors 30 and 40, find their way to the camera 4.
  • the symmetrically arranged mirrors 11 and 21 are used for the first beam, and the symmetrically arranged mirrors 31 and 41 for the second beam.
  • mirror holders are shown, namely mirror holder 5 for mirror 10, and mirror holder 6 for mirror 30.
  • further mirror holders are accommodated in the column 3.
  • dotted lines indicate the center lines of all beams.
  • angles which the beams make with the vertical plane V are shown between the dotted lines and the drawn vertical line representing plane V. These are chosen such that the beams coming directly from the products P divide the quadrant as equally as possible, taking into account the above drawbacks.
  • the angle for the first beam 100 is approximately 50° and for the second beam 200 approximately 10°.
  • the length of the mirrors reckoned in the direction parallel to the conveyor direction which is equal to the direction of the row, is chosen in a suitable manner, taking into account the above-mentioned parameters and the size of the fruits.
  • Lighting elements are not shown in the present Fig. 1. It can be noted about these that they make an angle with the vertical such that the products are lighted on all sides as optimally as possible. Because the frame 1 is generally accommodated in a case or box-shaped housing, or, alternatively, forms a part thereof, the angles are chosen for this purpose, more particularly approximately at the height of the beams with the largest angles. Unlike in many known devices according to the state of the art, where, usually, strip lights are used in combination with infrared lamps, in the device according to the invention, halogen vapor lamps or metal vapor lamps have been chosen, for instance mercury vapor lamps of the firm of OSRAM. These have both the advantages of compactness and the broad spectrum emitted by these lamps.
  • cylindrical casings for cooling can be used.
  • these are close-fitting cylinders transmitting the lighting which are at least partly flown through by a cooling fluid likewise transmitting the lighting, such as water.
  • the lighting may further be provided with polarization filters, depending on the colors and properties of the surfaces of the products.
  • extra infrared lamps may be used, so that, accordingly, a suitable camera, or cameras, need(s) to be chosen to be used.
  • a transparent screening may be provided at the height of the horizontal bridge 2, to further prevent pollution of the system of mirrors.
  • Fig. 2 shows an arrangement for multiple rows.
  • mirror 10 has been divided into a system of two mirrors 10' and 10".
  • Figs. 3A and 3B show further exemplary embodiments, in the manner as shown in Fig. 1, in which three beams are used to image surface strips. Again, the optical path lengths are equal. Such configurations may also be used for multiple rows next to one another. The differences with the first exemplary embodiment can be accounted for by different guiding, also called "folding", of the light beams in order to thus obtain more advantageous layouts of rows next to one another.
  • images will be obtained of three of four surface strips of a product. These strips will generally be contiguous to one another such that they allow the imaging of the whole surface of a product P.
  • Fig. 4 shows a view of a housing in more detail, with frame 1 itself forming part of the housing. It will be clear to any skilled person that a different choice may also be made for this. However, when the frame 1 has been placed in a housing, this will generally require more space .
  • T designates the conveying direction of the products
  • 50 designates a part of a conveying device by means of which the products P are conveyed.
  • end plates 51, 51' are shown, upstream and downstream, as well as plates 52 on which the mirrors have been mounted. Ends of these plates are provided in mortises 60 in the end plates 51, 51' shown.
  • Fig. 5 shows a detail of an end of a plate 52 inserted into a mortise 60.
  • the mortise 60 consists of a middle part 61, drawn horizontally here, connecting two end mortise parts 63, 63'. Along one of the edges of the middle part 61, a small curvature, bulge or cam 62 has been provided. It will be clear that such a mortise 60 is usually provided in plate metal to thus ensure stiffness and rigidity.
  • the end of the plate 52 provided in such a mortise 60 can be considered a tenon inserted into the mortise. At least the end or the tenon also has a middle part 70, a recess 71 therein, and two ends 73, 73' bent perpendicularly towards the same side at bends 72.
  • the lighting elements and the camera devices may also be clampingly mounted by means of the mortise and tenon joints.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Multimedia (AREA)
  • Sorting Of Articles (AREA)

Abstract

La présente invention concerne un dispositif qui permet de former l'image de produits transportés sur un rail de transporteur, par exemple des oeufs ou des fruits, lequel dispositif comprend : des moyens de transport déplacés par le rail de transporteur, sur lesquels les produits sont transportés en au moins une rangée formée à l'avance et peuvent tourner au cours du transport ; des éléments d'éclairage logés dans un boîtier, destinés à éclairer, le long d'une trajectoire bien définie, les surfaces de chaque produit de la rangée de produits ; un dispositif caméra logé dans un boîtier, destiné à enregistrer une image de chaque produit éclairé ; un système de miroirs logé dans le boîtier, comprenant des miroirs de chaque côté de la rangée, parallèles et symétriques par rapport à la rangée, et formant un angle par rapport à un plan vertical traversant la rangée, les longueurs de trajet optique de tous les faisceaux provenant des produits, qui sont dirigés par les miroirs vers la caméra, étant égales ; et un dispositif de traitement d'image destiné à traiter les images obtenues par le dispositif caméra en un flux de données image dans lequel au moins une partie des données image sont comparées à des propriétés image préétablies, le système de miroirs de chaque côté de la rangée permettant de diriger vers une seule caméra au moins un faisceau unique en provenance des produits, l'image d'un seul produit étant composée d'au moins trois bandes de surface. En particulier, les angles des faisceaux en provenance directe des produits sont distribués de façon uniforme sur les deux quadrants formés par la verticale et l'horizontale traversant la rangée, et sont situés au-dessus de la rangée. En outre, les éléments d'éclairage sont refroidis et les diverses pièces sont fixées entre elles par un assemblage à tenons et à mortaises. L'invention permet de la sorte d'obtenir un dispositif d'imagerie compact et fiable ne nécessitant pas d'entretien.
PCT/NL2004/000380 2003-05-27 2004-05-27 Dispositif d'imagerie WO2004105967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP03076642 2003-05-27
EP03076642.2 2003-05-27

Publications (1)

Publication Number Publication Date
WO2004105967A1 true WO2004105967A1 (fr) 2004-12-09

Family

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Family Applications (1)

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PCT/NL2004/000380 WO2004105967A1 (fr) 2003-05-27 2004-05-27 Dispositif d'imagerie

Country Status (2)

Country Link
CL (1) CL2004001298A1 (fr)
WO (1) WO2004105967A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724029A1 (fr) * 2005-05-17 2006-11-22 Visys NV Système de détection pour appareil de tri, méthode pour déterminer la dérive de ce système de détection et appareil de tri avec un tel système de détection
EP1724030A3 (fr) * 2005-05-17 2007-08-15 Visys NV Système de détection pour appareil de tri, méthode pour déterminer la dérive de ce système de détection et appareil de tri avec un tel système de détection
CN104949987A (zh) * 2015-05-12 2015-09-30 上海理工大学 产品检测装置
CN105424717A (zh) * 2014-09-05 2016-03-23 由田新技股份有限公司 多重瑕疵检出的光学检测设备
CN105841927A (zh) * 2016-04-22 2016-08-10 安徽捷迅光电技术有限公司 一种试验分选箱
CN110773453A (zh) * 2019-10-31 2020-02-11 博罗承创精密工业有限公司 一种led支架料带在线检测冲切方法及装置
CN111715546A (zh) * 2020-06-23 2020-09-29 云南得禄供应链管理有限公司 一种生鲜全自动快速称重分拣成套设备
EP4030234A1 (fr) * 2021-01-19 2022-07-20 Sick Ag Dispositif caméra et procédé de détection d'un objet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258810A2 (fr) * 1986-08-30 1988-03-09 Kabushiki Kaisha Maki Seisakusho Méthode et appareil pour inspecter les apparences des articles
WO1996024084A1 (fr) * 1995-02-03 1996-08-08 British Technology Group Limited Dispositif de visualisation
EP0736339A1 (fr) * 1995-04-06 1996-10-09 Materiel Pour L'arboriculture Fruitiere (M.A.F.) S.A. Dispositif d'analyse en vue du tri automatique de produits, notamment de fruits ou légumes
NL1013375C2 (nl) * 1999-10-22 2001-04-24 Food Processing Systems Inrichting voor het afbeelden van op een transportbaan getransporteerde producten.
WO2003023455A1 (fr) * 2001-09-13 2003-03-20 Anzpac Systems Limited Procede et appareil d'inspection d'articles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258810A2 (fr) * 1986-08-30 1988-03-09 Kabushiki Kaisha Maki Seisakusho Méthode et appareil pour inspecter les apparences des articles
WO1996024084A1 (fr) * 1995-02-03 1996-08-08 British Technology Group Limited Dispositif de visualisation
EP0736339A1 (fr) * 1995-04-06 1996-10-09 Materiel Pour L'arboriculture Fruitiere (M.A.F.) S.A. Dispositif d'analyse en vue du tri automatique de produits, notamment de fruits ou légumes
NL1013375C2 (nl) * 1999-10-22 2001-04-24 Food Processing Systems Inrichting voor het afbeelden van op een transportbaan getransporteerde producten.
WO2003023455A1 (fr) * 2001-09-13 2003-03-20 Anzpac Systems Limited Procede et appareil d'inspection d'articles

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1724029A1 (fr) * 2005-05-17 2006-11-22 Visys NV Système de détection pour appareil de tri, méthode pour déterminer la dérive de ce système de détection et appareil de tri avec un tel système de détection
EP1724030A3 (fr) * 2005-05-17 2007-08-15 Visys NV Système de détection pour appareil de tri, méthode pour déterminer la dérive de ce système de détection et appareil de tri avec un tel système de détection
US7557922B2 (en) 2005-05-17 2009-07-07 Visys Nv Detection system for use in a sorting apparatus, a method for determining drift in the detection system and a sorting apparatus comprising such detection system
CN105424717A (zh) * 2014-09-05 2016-03-23 由田新技股份有限公司 多重瑕疵检出的光学检测设备
CN105424717B (zh) * 2014-09-05 2017-12-15 由田新技股份有限公司 多重瑕疵检出的光学检测设备
CN104949987A (zh) * 2015-05-12 2015-09-30 上海理工大学 产品检测装置
CN104949987B (zh) * 2015-05-12 2017-08-01 上海理工大学 产品检测装置
CN105841927A (zh) * 2016-04-22 2016-08-10 安徽捷迅光电技术有限公司 一种试验分选箱
CN110773453A (zh) * 2019-10-31 2020-02-11 博罗承创精密工业有限公司 一种led支架料带在线检测冲切方法及装置
CN111715546A (zh) * 2020-06-23 2020-09-29 云南得禄供应链管理有限公司 一种生鲜全自动快速称重分拣成套设备
CN111715546B (zh) * 2020-06-23 2021-10-22 云南得禄供应链管理有限公司 一种生鲜全自动快速称重分拣成套设备
EP4030234A1 (fr) * 2021-01-19 2022-07-20 Sick Ag Dispositif caméra et procédé de détection d'un objet
DE102021100947A1 (de) 2021-01-19 2022-07-21 Sick Ag Kameravorrichtung und Verfahren zur Erfassung eines Objekts
US20220229291A1 (en) * 2021-01-19 2022-07-21 Sick Ag Camera device and method for detecting an object
DE102021100947B4 (de) 2021-01-19 2022-07-28 Sick Ag Kameravorrichtung und Verfahren zur Erfassung eines Objekts
CN114827395A (zh) * 2021-01-19 2022-07-29 西克股份公司 用于检测对象的相机设备和方法

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Publication number Publication date
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