Method for determining vehicle wheel alignments
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United States of America Patent
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Mar 3, 1998
Grant Date -
N/A
app pub date -
Sep 16, 1996
filing date -
Apr 23, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for calculating vehicle wheel alignment, comprising: use of two television cameras arranged in such positions as to frame and observe two different visual angles contemporaneously of a single wheel of a vehicle; designation of geometrical entities characteristic of said single wheel by means of which a plane of said wheel is identified; calculation of two transformations between coordinates of at least three unaligned points of said plane of said wheel and position of said correspondences respectively on focal planes on which images of said television cameras are formed, by means of two application matrices; calculation of said application matrices obtained by means of observation of the two television cameras of a set of points positioned in a known way in space; calculation of two inverse applications through which it is possible to derive coordinates in space of three unaligned points of said wheel plane starting from a knowledge of the coordinates of said points of focal planes of said two television cameras; calculation of an equation of a plane of said wheel and of a vector normal thereto, as well as angles formed by said vector with reference axes.
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