Patents by Inventor Ulf Hassler
Ulf Hassler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10308464Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: GrantFiled: April 25, 2016Date of Patent: June 4, 2019Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Guenther Kostka, Peter Schmitt, Oliver Scholz, Ulf Hassler
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Publication number: 20160236892Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: ApplicationFiled: April 25, 2016Publication date: August 18, 2016Inventors: Guenther KOSTKA, Peter SCHMITT, Oliver SCHOLZ, Ulf HASSLER
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Patent number: 9322642Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: GrantFiled: September 23, 2014Date of Patent: April 26, 2016Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Guenther Kostka, Peter Schmitt, Oliver Scholz, Ulf Hassler
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Publication number: 20150009510Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: ApplicationFiled: September 23, 2014Publication date: January 8, 2015Inventors: Guenther KOSTKA, Peter SCHMITT, Oliver SCHOLZ, Ulf HASSLER
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Patent number: 8892396Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: GrantFiled: February 16, 2011Date of Patent: November 18, 2014Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.Inventors: Guenther Kostka, Peter Schmitt, Oliver Scholz, Ulf Hassler
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Publication number: 20110202309Abstract: A distance measure between a beginning and an end of a material strip wound onto a body in a tangential direction can be determined by creating a height profile of a surface of the material strip, which covers the beginning and the end of the wound material strip in the tangential direction. If a position value of the beginning of the material strip is determined in the created height profile, the distance measure can be determined using this position value and the height profile covering the end of the material strip.Type: ApplicationFiled: February 16, 2011Publication date: August 18, 2011Inventors: Guenther Kostka, Peter Schmitt, Oliver Scholz, Ulf Hassler
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Patent number: 7257996Abstract: A surface of a body includes a structure bounded by edges and a substantially edge-free unevenness. The structure is considered a quality impairment and the unevenness a potential quality impairment. A device includes a means for generating a height representation of the surface including the structure and the unevenness. A means for calculating a variation representation calculates the variation for every point of the height so that a high variation is obtained at a boundary of the structure and a low variation is obtained at a boundary of the unevenness. A means for detecting regions that potentially affect quality detects when a variation magnitude is smaller than a predetermined variation threshold value. These regions are examined to exclude uncritical regions and to determine the actual number of regions that affect quality. Quality control is performed on vehicle tires having structures such as inscriptions, and which also have bulges or constrictions that are substantially edge-free and uneven.Type: GrantFiled: August 4, 2005Date of Patent: August 21, 2007Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Ulf Hassler, Peter Schmitt, Guenther Kostka
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Patent number: 7088442Abstract: A device for quality testing of a body comprising a surface comprising a structuring bounded by edges and a substantially edge-free unevenness, wherein the structuring illustrates a quality impairment and wherein the unevenness illustrates a potential quality impairment, includes a means for generating a height representation, wherein the height representation of the surface includes the structuring and the unevenness. A means for calculating a variation representation calculates the variation associated to the point for every point of the height representation, so that at a boundary of the structuring a high variation is obtained, while at a boundary of the unevenness a low variation is obtained. A means for detecting regions which are potentially quality affecting detects regions as potentially quality-affecting which comprise a variation which is smaller than a predetermined variation threshold value regarding its magnitude.Type: GrantFiled: December 13, 2001Date of Patent: August 8, 2006Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.VInventors: Ulf Hassler, Peter Schmitt, Guenther Kostka
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Patent number: 7012701Abstract: In a method for characterizing a surface comprising a localized unevenness, a contour line of the surface is initially created as a function of a location variable. Subsequently, the localized unevenness is detected in the contour line and eliminated from the contour line, so that an incomplete contour line results as a function of the location variable, which characterizes the surface without the localized unevenness. The incomplete contour line may be used to either be able to evaluate the surface without any localized points of unevenness, for example to determine the side wobble or height wobble of a tire, if the surface is a side flank and/or a running tread of a vehicle tire, or to classify the localized points of unevenness without any influence of the surface.Type: GrantFiled: December 5, 2001Date of Patent: March 14, 2006Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.Inventors: Ulf Hassler, Peter Schmitt, Günther Kostka
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Publication number: 20050286046Abstract: A device for quality testing of a body comprising a surface comprising a structuring bounded by edges and a substantially edge-free unevenness, wherein the structuring illustrates a quality impairment and wherein the unevenness illustrates a potential quality impairment, includes a means for generating a height representation, wherein the height representation of the surface includes the structuring and the unevenness. A means for calculating a variation representation calculates the variation associated to the point for every point of the height representation, so that at a boundary of the structuring a high variation is obtained, while at a boundary of the unevenness a low variation is obtained. A means for detecting regions which are potentially quality affecting detects regions as potentially quality-affecting which comprise a variation which is smaller than a predetermined variation threshold value regarding its magnitude.Type: ApplicationFiled: August 4, 2005Publication date: December 29, 2005Inventors: Ulf Hassler, Peter Schmitt, Guenther Kostka
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Patent number: 6975697Abstract: An apparatus and method for establishing a correction characteristic curve for a reduction of artefacts in a tomography are described. Projection data of the object is provided, wherein the projection data comprises transmission values for the object. A representation of the object is calculated from the projection data to obtain two or three-dimensional representation data for the object. A measure for the transmission length of the object is determined by using the representation data. A transmission value, which is associated to the determined measure for the transmission length, is determined and the correction characteristic curve of several determined measures is generated for transmission lengths and associated transmission values, wherein a precorrection of the projection data can be performed by using the determined correction characteristic curve, to iteratively determine the correction characteristic curve by using the precorrected transmission values.Type: GrantFiled: June 4, 2004Date of Patent: December 13, 2005Assignee: Fraunhofer-Gesellschaft zur Foerdering der Angewandten Forschung e.v.Inventors: Stefan Kasperl, Ulf Hassler, Ingo Bauscher, Stefan Schroepfer
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Publication number: 20050259859Abstract: In a method for characterizing a surface comprising a localized unevenness, a contour line of the surface is initially created as a function of a location variable (10). Subsequently, the localized unevenness is detected in the contour line (12) and eliminated from the contour line (14), so that an incomplete contour line results as a function of the location variable, which characterizes the surface without the localized unevenness. The incomplete contour line may be used to either be able to evaluate the surface without any localized points of unevenness, for example to determine the side wobble or height wobble of a tire, if the surface is a side flank and/or a running tread of a vehicle tire, or to classify the localized points of unevenness without any influence of the surface.Type: ApplicationFiled: December 5, 2001Publication date: November 24, 2005Inventors: Ulf Hassler, Peter Schmitt, Gunther Kostka
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Publication number: 20050154563Abstract: An apparatus for evaluating a state of an object includes a means for providing a three-dimensional representation of the object including information about the state to be evaluated. The three-dimensional representation is then subdivided into a plurality of sub-areas that are subsequently evaluated sub-area by sub-area, namely by two-dimensionally examining each sub-area of the plurality of sub-areas, in order to ascertain data about a place in a sub-area at which the state deviates from a default state. A three-dimensional connection analysis using the data about the places from the individual sub-areas provides a three-dimensional description of a three-dimensional place whose state deviates from the default state. By splitting up the three-dimensional representation into several sub-areas that may be analyzed two-dimensionally, powerful image processing algorithms may be employed. The three-dimensionality is then again achieved by means of a connection analysis of the two-dimensional data.Type: ApplicationFiled: February 27, 2004Publication date: July 14, 2005Inventors: Ulf Hassler, Steven Oeckl, Thomas Wenzel, Randolf Hanke, Guenther Kostka
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Publication number: 20050013404Abstract: An apparatus for establishing a correction characteristic curve for a reduction of artefacts in a tomography comprises a means for providing projection data of the object, wherein the projection data comprise transmission values for the object, a means for calculating a representation of the object from the projection data, to obtain two or three-dimensional representation data for the object, a means for determining a measure for the transmission length of the object by using the representation data, a means for determining a transmission value, which is associated to the determined measure for the transmission length, and a means for generating the correction characteristic curve of several determined measures for transmission lengths and associated transmission values, wherein a precorrection of the projection data can be performed by using the determined correction characteristic curve, to iteratively determine the correction characteristic curve by using the precorrected transmission values.Type: ApplicationFiled: January 23, 2003Publication date: January 20, 2005Inventors: Stefan Kasperl, Ulf Hassler, Ingo Bauscher, Stefan Schroepfer
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Publication number: 20040071334Abstract: A device for quality testing of a body comprising a surface comprising a structuring bounded by edges and a substantially edge-free unevenness, wherein the structuring illustrates a quality impairment and wherein the unevenness illustrates a potential quality impairment, includes a means for generating a height representation, wherein the height representation of the surface includes the structuring and the unevenness. A means for calculating a variation representation calculates the variation associated to the point for every point of the height representation, so that at a boundary of the structuring a high variation is obtained, while at a boundary of the unevenness a low variation is obtained. A means for detecting regions which are potentially quality affecting detects regions as potentially quality-affecting which comprise a variation which is smaller than a predetermined variation threshold value regarding its magnitude.Type: ApplicationFiled: October 23, 2003Publication date: April 15, 2004Inventors: Ulf Hassler, Peter Schmitt, Guenther Kostka
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Patent number: 6539789Abstract: A device for the contactless detection of a potentially existing essentially edge-free irregularity in a convex surface, which has a structuring that is delimited by edges, comprises a unit for creating a three-dimensional representation of the surface, a unit for extracting the convexity from the three-dimensional representation of the surface and for smoothing the edges of the structuring so as to obtain a convex-free representation of the convex surface which exhibits the irregularity and the structuring, whose edges have now been smoothed, a unit for comparing the convex-free representation with a threshold value so as to identify areal regions of the convex-free representation which are determined by a predetermined relationship to the threshold value, and a unit for analyzing the areas of the identified regions, a region being detected as an irregularity if its area exceeds a predetermined area.Type: GrantFiled: July 16, 2001Date of Patent: April 1, 2003Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e. V.Inventors: Guenther Kostka, Peter Schmitt, Ulf Hassler, Randolf Hanke