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1
US9986232B1
Publication/Patent Number: US9986232B1
Publication date: 2018-05-29
Application number: 14/695,819
Filing date: 2015-04-24
Inventor: Shylanski, Mark S.  
Abstract: A method for distance calibration of machine vision optical targets and associated observing imaging sensors using separation distances between discrete surface measurement points. First, a spatial position for each surface point is established from a series of observations by the associated observing imaging sensor of the optical targets mounted to a calibration fixture. Second, measures of a linear separation distance between particular pairs of surface points are identified independently from the machine vision observations. All resulting spatial positions and measurements are conveyed to a processing system configured with a set of software instructions for carrying out distance calibration calculations to establish a set of refined distance calibration parameters associated with each combination of optical target and observing imaging sensor. During subsequent use of the machine vision vehicle service system, the parameters are retrieved and utilized to improve vehicle measurement precision. A method for distance calibration of machine vision optical targets and associated observing imaging sensors using separation distances between discrete surface measurement points. First, a spatial position for each surface point is established from a series of observations by ...more ...less
3
EP3364149A1
Publication/Patent Number: EP3364149A1
Publication date: 2018-08-22
Application number: 18165658.8
Filing date: 2011-04-07
Abstract: An optical target assembly (100) to secure an optical target relative to a vehicle wheel assembly (10) consisting of a wheel rim having a circumferential lip and a tire mounted thereon for rotation about an axis, comprises: a base assembly (102) including a contact surface (110) configured for non-determined abutting placement at a plurality of contact points against an outer surface of the vehicle wheel assembly, between the circumferential lip of the wheel rim and an axial center point of the wheel rim; characterized by a target support assembly (108) removably secured to said base assembly axially outboard from said contact surface (110); and at least one attachment mechanism configured (104A, 104B, 106, 300) to maintain each of said contact points of said contact surface in contact with, and immobile relative to, said outer surface of the wheel assembly during a vehicle service procedure; and wherein said target support assembly (108) includes a first target surface (200A) and a separate second target surface (200B), with a plurality of optical target elements (202) disposed on each of said first and second target surfaces, the second target surface (200B) separately disposed axially inward from the first target surface (200A), and is offset from a plane of the first target surface (200A). An optical target assembly (100) to secure an optical target relative to a vehicle wheel assembly (10) consisting of a wheel rim having a circumferential lip and a tire mounted thereon for rotation about an axis, comprises: a base assembly (102) including a contact surface (110) ...more ...less
4
US9665793B2
Publication/Patent Number: US9665793B2
Publication date: 2017-05-30
Application number: 14/209,552
Filing date: 2014-03-13
Abstract: A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images corresponding to the wheel assembly, such as by recognition of the wheel rim edge. The identified portion of each image is cropped and a resulting point cloud of data rotational aligned by an optimization procedure to remove the effect of wheel translation and rotation between each image, as well as to identify a center of rotation and amount of rotation for each image which yields a best-fit result. Superimposing the resulting point clouds produces a generated image with a high density of data points on the optimally fit surfaces of the wheel assembly, which can be used to further refine the axis of rotation determination. A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images ...more ...less
5
US9544545B2
Publication/Patent Number: US9544545B2
Publication date: 2017-01-10
Application number: 14/464,534
Filing date: 2014-08-20
Abstract: A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the imaging sensor. The optical target includes a plurality of visible target elements disposed on at least two surfaces in a determinable geometric and spatial configuration which are calibrated prior to use. A processing unit in the system is configured to receive at least two sets of image data from the imaging sensor, with each set of image data acquired at a different rotational position of the wheel assembly around an axis of rotation and representative of at least one visible target element on each of the two surfaces, from which the processing unit is configured to identify said axis of rotation of the wheel assembly. A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the ...more ...less
6
US9644952B2
Publication/Patent Number: US9644952B2
Publication date: 2017-05-09
Application number: 13/830,867
Filing date: 2013-03-14
Abstract: A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of view, with a common overlapping region associated with each respective side of the vehicle support structure. Optical targets disposed within each of the overlapping field of view regions are observed by the imaging components to establish performance ratings for the system as a whole, for groups of components within the system, and for individual components within the system. A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of ...more ...less
7
EP2972076A1
Publication/Patent Number: EP2972076A1
Publication date: 2016-01-20
Application number: 14768865.9
Filing date: 2014-03-13
8
EP2972076A4
Publication/Patent Number: EP2972076A4
Publication date: 2016-11-09
Application number: 14768865
Filing date: 2014-03-13
9
CN105841639A
Publication/Patent Number: CN105841639A
Publication date: 2016-08-10
Application number: 201610188334
Filing date: 2011-04-07
Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position
10
CN103080694B
Publication/Patent Number: CN103080694B
Publication date: 2016-04-06
Application number: 201180042684
Filing date: 2011-04-07
Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position
11
US2014267699A1
Publication/Patent Number: US2014267699A1
Publication date: 2014-09-18
Application number: 14/209,552
Filing date: 2014-03-13
Abstract: A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images corresponding to the wheel assembly, such as by recognition of the wheel rim edge. The identified portion of each image is cropped and a resulting point cloud of data rotational aligned by an optimization procedure to remove the effect of wheel translation and rotation between each image, as well as to identify a center of rotation and amount of rotation for each image which yields a best-fit result. Superimposing the resulting point clouds produces a generated image with a high density of data points on the optimally fit surfaces of the wheel assembly, which can be used to further refine the axis of rotation determination. A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images ...more ...less
12
WO2014151666A1
Publication/Patent Number: WO2014151666A1
Publication date: 2014-09-25
Application number: 2014026211
Filing date: 2014-03-13
Abstract: A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images corresponding to the wheel assembly A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images ...more ...less
13
US8875407B2
Publication/Patent Number: US8875407B2
Publication date: 2014-11-04
Application number: 13/781,977
Filing date: 2013-03-01
Abstract: A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the imaging sensor. The optical target includes a plurality of visible target elements disposed on at least two surfaces in a determinable geometric and spatial configuration which are calibrated prior to use. A processing unit in the system is configured to receive at least two sets of image data from the imaging sensor, with each set of image data acquired at a different rotational position of the wheel assembly around an axis of rotation and representative of at least one visible target element on each of the two surfaces, from which the processing unit is configured to identify said axis of rotation of the wheel assembly. A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the ...more ...less
14
US2014354818A1
Publication/Patent Number: US2014354818A1
Publication date: 2014-12-04
Application number: 14/464,534
Filing date: 2014-08-20
Abstract: A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the imaging sensor. The optical target includes a plurality of visible target elements disposed on at least two surfaces in a determinable geometric and spatial configuration which are calibrated prior to use. A processing unit in the system is configured to receive at least two sets of image data from the imaging sensor, with each set of image data acquired at a different rotational position of the wheel assembly around an axis of rotation and representative of at least one visible target element on each of the two surfaces, from which the processing unit is configured to identify said axis of rotation of the wheel assembly. A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the ...more ...less
15
US2014111645A1
Publication/Patent Number: US2014111645A1
Publication date: 2014-04-24
Application number: 13/830,867
Filing date: 2013-03-14
Abstract: A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of view, with a common overlapping region associated with each respective side of the vehicle support structure. Optical targets disposed within each of the overlapping field of view regions are observed by the imaging components to establish performance ratings for the system as a whole, for groups of components within the system, and for individual components within the system. A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of ...more ...less
16
WO2014062877A1
Publication/Patent Number: WO2014062877A1
Publication date: 2014-04-24
Application number: 2013065361
Filing date: 2013-10-17
Abstract: A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of view A process for calibrating and evaluating a machine-vision vehicle wheel alignment system having front and rear imaging components associated with each of the left and right sides of a vehicle support structure. Each pair of imaging components defines a front and rear field of ...more ...less
17
US8341848B2
Publication/Patent Number: US8341848B2
Publication date: 2013-01-01
Application number: 12/875,796
Filing date: 2010-09-03
Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed on a plurality of target surfaces. Images of the optical target elements are acquired by an imaging system, together with target identifying indicia, and utilized together with previously stored target characterization data to determine a spatial orientation of the optical target assembly and an alignment of the vehicle wheel onto which it is secured. A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed ...more ...less
18
US8561307B2
Publication/Patent Number: US8561307B2
Publication date: 2013-10-22
Application number: 13/693,750
Filing date: 2012-12-04
Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed on a plurality of target surfaces. Images of the optical target elements are acquired by an imaging system, together with target identifying indicia, and utilized together with previously stored target characterization data to determine a spatial orientation of the optical target assembly and an alignment of the vehicle wheel onto which it is secured. A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed ...more ...less
19
US2013250098A1
Publication/Patent Number: US2013250098A1
Publication date: 2013-09-26
Application number: 13/693,750
Filing date: 2012-12-04
Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed on a plurality of target surfaces. Images of the optical target elements are acquired by an imaging system, together with target identifying indicia, and utilized together with previously stored target characterization data to determine a spatial orientation of the optical target assembly and an alignment of the vehicle wheel onto which it is secured. A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed ...more ...less
20
US8490290B2
Publication/Patent Number: US8490290B2
Publication date: 2013-07-23
Application number: 13/483,976
Filing date: 2012-05-30
Abstract: A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the imaging sensor. The optical target includes a plurality of visible target elements disposed on at least two surfaces in a determinable geometric and spatial configuration which are calibrated prior to use. A processing unit in the system is configured to receive at least two sets of image data from the imaging sensor, with each set of image data acquired at a different rotational position of the wheel assembly around an axis of rotation and representative of at least one visible target element on each of the two surfaces, from which the processing unit is configured to identify said axis of rotation of the wheel assembly. A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the ...more ...less