Methods, apparatus and computer programs for correcting a buff of tread from a crown of a tire, the steps of the method including measuring the distance between the tire crown surface and the belt at each of the plurality of locations; calculating a projected distance between the crown surface and t
Methods, apparatus and computer programs for correcting a buff of tread from a crown of a tire, the steps of the method including measuring the distance between the tire crown surface and the belt at each of the plurality of locations; calculating a projected distance between the crown surface and the belt at each of the plurality of transverse locations across the crown using proposed buff radii, choosing a new position of the buffing radius origin from the one or more proposed origin positions; and buffing the tread from the tire crown along the arc described by the buff radius having the buffing radius origin at the new position.
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1. A method for correcting a buff of tread from a crown of a tire, the buff being an asymmetrical buff, the method comprising: receiving a signal from a sensor, the sensor scanning a transverse path across at least a portion of the crown of the tire, the signal being received from each of a pluralit
1. A method for correcting a buff of tread from a crown of a tire, the buff being an asymmetrical buff, the method comprising: receiving a signal from a sensor, the sensor scanning a transverse path across at least a portion of the crown of the tire, the signal being received from each of a plurality of transverse locations across the portion of the tire crown, the signal being generated by the sensor as a function of a distance between the tire crown surface and a belt in the tire;interpreting the sensor signal as a measured distance between the tire crown surface and the belt at each of the plurality of locations;selecting one or more proposed origin positions for a new buffing radius, wherein each of the proposed origin positions are not on a centerline of the tire;calculating a projected distance between the crown surface and the belt at each of the plurality of transverse locations across the crown, wherein each projected distance is based upon an arc described by a buffing radius having the one or more proposed origin positions;choosing a new origin position for the new buff radius from the one or more proposed origin positions; andbuffing the tread from the tire crown along the arc described by the new buff radius. 2. The method of claim 1, further comprising: determining if the buff of the tread from the crown of the tire at a buffed buffing radius was an asymmetrical buff, a symmetrically deviated buff or a combination thereof. 3. The method of claim 2, further comprising: determining to move the position of the origin normal to the centerline if the buff was asymmetrical; anddetermining to move the origin to a position that is in a direction normal to the centerline and then in a direction along a line that is parallel to the centerline if the buff was both asymmetrical and symmetrically deviated. 4. The method of claim 1, further comprising: progressing through a series of iterations to select the proposed origin positions for the new buff radius. 5. The method of claim 1, wherein the step of choosing the new position further comprises: choosing the new origin position through statistical analysis of calculated differences between the measured distances and a target distance and calculated differences between the projected distances and the target distance, the differences being calculated for each of the plurality of transverse locations. 6. The method of claim 5, wherein the statistical analysis is the least sum of the squares technique. 7. The method of claim 1, further comprising: shortening a length of the new buff radius, wherein the arc is closer to the belt of the tire than an arc described by a buffed buffing radius. 8. A computer program product including instructions embodied on a computer readable storage medium, the computer program product acting to correct a buff of tread from a crown of a tire, the buff being an asymmetrical buff, the computer program comprising: receiving instructions for receiving a signal from a sensor, the signal being received from each of a plurality of transverse locations across a portion of the tire crown, the signals being generated by the sensor as a function of a distance between the tire crown surface and a belt in the tire;interpreting instructions for interpreting each sensor signal as a measured distance between the tire crown surface and the belt at each of the plurality of locations;selecting instructions for selecting one or more proposed origin positions for a buffing radius, wherein the proposed origin positions are not on a centerline of the tire;calculating instructions for calculating a projected distance between the crown surface and the belt at each of the plurality of transverse locations across the crown, wherein each projected distance is based upon an arc described by the buffing radius having the one or more proposed origin positions;choosing instructions for choosing a new position of the buffing radius origin from the one or more proposed origin positions; andbuffing instructions for buffing the tread from the tire crown along the arc described by the buff radius having the buffing radius origin at the new position. 9. The computer program product of claim 8, further comprising: determining instructions for determining if the buff of the tread from the crown of the tire at a buffed radius was an asymmetrical buff, a symmetrically deviated buff or a combination thereof. 10. The computer program product of claim 8, further comprising: changing instructions for changing a length of the buff radius having the buffing radius origin at a new position; andbuffing instructions for buffing the tread from the tire crown along the arc described by the buff radius having the buffing radius origin at the new position and the changed length. 11. The computer program product of claim 9, further comprising: selecting instructions for selecting the proposed origin position as being one that is not on a line that is both normal to a centerline and passing through the buffed radius origin if the buff is both asymmetrical and symmetrically deviated. 12. The computer program product of claim 8, further comprising: progressing instructions for progressing through a series of iterations of selecting a plurality of proposed origin positions for proposed buff radii; andcalculating instructions for calculating the projected distance between the crown surface and the belt at each of the plurality of transverse locations across the crown, wherein each projected distance is based upon an arc described by each of the plurality of proposed buffing radii having the plurality of proposed origin positions. 13. The computer program product of claim 8, wherein the instructions for choosing the new position further comprise: choosing instructions for choosing the new origin position through statistical analysis of calculated differences between the measured and projected distances at each of the plurality of transverse locations. 14. The computer program product of claim 13, wherein the statistical analysis is the least sum of the squares technique. 15. A tire buffing machine for correcting a buff of tread from a crown of a tire, the buff being an asymmetrical buff, the buffing machine comprising: a sensor that provides a sensor output signal that is a function of a distance between the tire crown surface and a belt in the tire;a controller, the controller comprising a processor and a memory storage device that stores instructions executable by the processor, such executable instructions including the instructions of claim 8; anda buffing head for buffing the tire. 16. The tire buffing machine of claim 15, wherein the sensor is operably mounted in fixed relation to the buffing head. 17. The tire buffing machine of claim 16, wherein the computer executable instructions further comprise: determining instructions for determining a location of the sensor relative to a centerline of the tire based upon the fixed relation of the sensor to the buffing head. 18. A tire buffing machine for buffing a tread from a crown of a tire, the buffing machine comprising: a sensor that provides a sensor output signal that is a function of a distance between the tire crown surface and a belt in the tire, the sensor being operably mounted in fixed relation to the buffing head;a buffing head for buffing the tire; anda controller, the controller comprising a processor and a memory storage device that stores instructions executable by the processor, such executable instructions including instructions to control the contact between the crown of the tire and the buffing head; anddetermining instructions executable by the processor for determining a location of the sensor relative to a centerline of the tire based upon the fixed relation of the sensor to the buffing head.
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이 특허에 인용된 특허 (24)
Simpson John R. (Charlotte NC) Lozier ; Jr. Robert E. (Monroe NC), Apparatus and method for displaying the measurement of a tire.
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