Method and device for the measuring of wheel angles
First Claim
1. Marker device for the measuring of wheel angles on vehicles with an electronic camera, in particular toe in, camber and thrust misalignment between wheels and body, comprising:
- a supporting structure provided with fastening means enabling mounting on a vehicle perpendicular to the length axis of the vehicle and at each end being provided with at least three markers that are detectable by the camera, the three markers at each end being placed so that at least two have different positions relative to the length axis of the vehicle and at least two have different positions perpendicular to the length axis of the vehicle, the positions of the markers are well defined as to dimensions and configuration so that the marker device can serve as a base for parallelism and camera angles at a measuring of the wheel angles so that the measurements of the left and right side can be correlated.
1 Assignment
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Accused Products
Abstract
Measuring system for the measuring of wheel angles comprising cameras (21) pivotable on rear wheel (22) fastenings and looking both on front wheel marker arrangements (24) and a marker device (25) arranged perpendicular relative the length direction of the vehicle. The camera registers the angles of the wheel it is mounted on by viewing the marker device and the angles of the front wheel by subtracting the angles of the wheel with the camera from those obtained for the marker arrangement on the front wheel. The marker arrangement is diametrically symmetric and allows together with pivotability of the camera a rotating of the wheels over a half revolution so that possible mounting errors can be detected and correlated for.
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Citations
17 Claims
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1. Marker device for the measuring of wheel angles on vehicles with an electronic camera, in particular toe in, camber and thrust misalignment between wheels and body, comprising:
a supporting structure provided with fastening means enabling mounting on a vehicle perpendicular to the length axis of the vehicle and at each end being provided with at least three markers that are detectable by the camera, the three markers at each end being placed so that at least two have different positions relative to the length axis of the vehicle and at least two have different positions perpendicular to the length axis of the vehicle, the positions of the markers are well defined as to dimensions and configuration so that the marker device can serve as a base for parallelism and camera angles at a measuring of the wheel angles so that the measurements of the left and right side can be correlated. - View Dependent Claims (2, 3, 4, 5, 8, 9, 14, 15)
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6. Marker arrangement for mounting on the wheels when measuring wheel angles on vehicles with an electronic camera, in particular toe in, camber and thrust misalignment between wheels and body, comprising:
- at least three markers that are detectable by the camera, the three markers being placed so that at least two have different positions relative to the length axis of the vehicle and at least two have different positions perpendicular to the length axis of the vehicle, the positions of the markers are well defined as to dimensions and configuration so that the wheel angles can be registered.
- View Dependent Claims (7, 16, 17)
- 10. Camera for the measuring of wheel angles on vehicles, in particular toe-in, camber and thrust misalignment between wheels and body, comprising a fastening means for fastening it on a vehicle wheel and that the camera is journaled on the fastening means pivotable on an axle that is essentially coinciding with the vehicle wheel and that the camera has its center of gravity and pivot axle so located that the camera automatically will hang looking forwards with the optical axis of the camera essentially perpendicular to the pivot axis.
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13. Method for the measuring of wheel angles on vehicles, in particular toe in, camber and thrust misalignment between wheels and body, comprising the use of an electronic camera looking along the vehicle and bars provided with two markers at each end that are easy for the camera to detect, which bars are of the same length and arranged horizontally and laterally symmetrically at different locations lengthwise of the vehicle, marker bars serving as a base for parallelism at the measuring of the wheel angles so that the measurements of the left and right side can be correlated.
Specification