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公开(公告)号：US20190178812A1
公开(公告)日：2019-06-13
申请号：US16301024
申请日：2017-05-29
Applicant: BOBST MEX SA
Inventor： Matthieu RICHARD , Francis PILLOUD
Abstract: A surface inspection system (10) for inspecting the surface of sheet elements (2) present in an inspection area (5): The system includes an image evaluation unit (18), two light sources (12, 14) arranged adjacent each other on opposite sides of an illumination plane (O11) and oriented for illuminating the inspection area (5), and a camera (16) for capturing line images (I12, I14) of the inspection area (5) along a viewing plane (O16). The illumination plane (O11) and the viewing plane (O16) are arranged on opposite sides of a median plane (M) which is perpendicular to an inspection plane. The angle (α) between the illumination plane (O11) and the median plane (M) is the same as the angle (α) between the viewing plane (O16) and the median plane (M). Also, a method of inspecting the surface of sheet elements (4) by using the surface inspection system (10) as defined above, wherein a first of the two light sources (12, 14) directs light onto the sheet element (4) to be inspected, and the camera (16) captures a line image (I12; I14) of the inspection area (5), and then a second of the two light sources (14, 12) directs light onto the sheet element (4) to be inspected, and the camera (16) captures a line image (I14; I12) of the inspection area (5). Then an image evaluation unit (18) compares the captured line images (I14; I12) with each other, and in particular subtracts the images from each other.
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2.发明申请公开(公告)号：US20190154589A1
公开(公告)日：2019-05-23
申请号：US16099706
申请日：2017-05-17
Applicant: BOBST MEX SA
Inventor： Matthieu RICHARD , Francis PILLOUD
IPC: G01N21/89
CPC classification number: G01N21/8914 , G01N21/8901 , G01N2021/8905 , G01N2021/8908 , G01N2021/8917 , G01N2201/0626 , G01N2201/0634 , G01N2201/0636 , G01N2201/0637
Abstract: A quality control station (2) for a sheet element processing machine, having at least one camera (6) arranged for capturing images of sheet elements (4) transported through the quality control station (2), and further having an illumination unit (5) with at least one light emitter (16) and two reflectors (12, 14), the illumination unit (5) directing light onto a viewing area of the camera (6) such that the illumination intensity is constant despite changing media thickness. An illumination unit for such quality control station is disclosed.
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Patent Agency Ranking
公开(公告)号：US20220182556A1
公开(公告)日：2022-06-09
申请号：US17593327
申请日：2020-03-18
Applicant: BOBST MEX SA
Inventor： Francis PILLOUD , Pablo ANTOLINEZ , Olivier PORRET
Abstract: This invention is about an imaging system that uses conventional cameras and a single laser line to perform quality control at the output of a converting machine or a press. The system uses several cameras distributed over the width of the printed sheets. Thanks to the laser line, it can reconstruct the complete image of the printed matter even when the sheets are not perfectly flat or at varying height, compensating geometric as well as photometric distortions. The use of conventional cameras results in a cost effective system.
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公开(公告)号：US20190154578A1
公开(公告)日：2019-05-23
申请号：US16099042
申请日：2017-05-29
Applicant: BOBST MEX SA
Inventor： Matthieu RICHARD , Francis PILLOUD
Abstract: A surface inspection system (10) for inspecting the surface of sheet elements (4) present in an inspection area (20). The system includes an image evaluation unit (18), a camera (12), a dark-field illuminator (14) and a bright-field illuminator (16). The image evaluation unit (18) subtracts a line image captured under bright-field illumination conditions from a line image captured under dark-field illumination conditions. A method of identifying highly reflective surface areas on a sheet element (4) being moved through a sheet element processing machine, wherein first a line image (I16) of the surface of the sheet element (4) in the viewing area (20) is captured under bright-field illumination conditions and a line image (I14) of the same surface of the sheet element (4) in the viewing area (20) is captured under dark-field illumination conditions, and then the two line images (I14, I16) are compared, in particular subtracted from each other, wherein the surface is identified as being reflective if the difference (Sn) between the two line images (I14, I16) is above a predefined threshold.
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公开(公告)号：US20240326405A1
公开(公告)日：2024-10-03
申请号：US18580065
申请日：2022-07-14
Applicant: BOBST MEX SA
Inventor： Thomas HOFMANN , Francis PILLOUD
CPC classification number: B41F33/0036 , B41F5/24 , B41F33/0081
Abstract: The invention relates to an inspection device (42) for checking the position of at least one coating on a blank (1) transported through a converting machine (10). The inspection device comprising a camera (49) configured to capture an image of a portion of the blank provided with a reference mark (30) comprising at least one coating,
An optical axis (A) of the camera is arranged at first angle ((p) in relation to a vertical axis (V) defined by a normal vector (N) of a surface of the blank (1). An illumination system (50) is configured to emit incident light rays towards a measuring point (Pm) on the blank 1. The incident light rays from the illumination system are directed to the reference mark and specular reflected light rays from the reference mark are captured by the camera.-
公开(公告)号：US20230356422A1
公开(公告)日：2023-11-09
申请号：US18246226
申请日：2021-10-01
Applicant: BOBST MEX SA
Inventor： Francis PILLOUD , Thomas HOFMANN , Olivier FAUCONNEAU
CPC classification number: B26D5/007 , B26D7/2628
Abstract: A sheet material processing unit (10) is described. It comprises an upper tool (18) and a lower tool (14), wherein the upper tool (18) and the lower tool (14) are configured to interact with each other in order to process sheet material (26). Furthermore, a camera unit (40) is provided which is arranged such that it is able to simultaneously capture a portion of the upper tool (18) comprising a first opening (28) and a portion of the lower tool (14) lying behind the first opening (28) for aligning the tools (14, 18). The sheet material processing unit (10) additionally comprises a first and a second set of light sources which are distinct from one another and are configured for subsequently illuminating the portions to be captured. Moreover, methods for assessing an alignment of the upper tool (18) with respect to the lower tool (14) and with respect to the sheet material (26) are presented.
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7.发明申请公开(公告)号：US20190145760A1
公开(公告)日：2019-05-16
申请号：US16098576
申请日：2017-05-17
Applicant: BOBST MEX SA
Inventor： Matthieu RICHARD , Francis PILLOUD
Abstract: An image capturing system (10), and a corresponding method, for determining the position of an embossed structure (30) on a sheet element (4) moved though a viewing area (18). It includes a camera (12) adapted for capturing a line image of the surface of the sheet element (4) in the viewing area (18), and an illumination unit (14) with a plurality of light sources (20, 21, . . . ) each adapted for illuminating the viewing area (18). The light sources (20, 21, . . . ) are arranged at different inclinations with respect to the viewing area (18). An image evaluation unit (16) determines an inclination-related parameter for the surface of the sheet element (4) in the viewing area (18) across the viewing area (18).
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