| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform projective transformation without being affected by a temperature property. <P>SOLUTION: Projective transformation T is determined on the basis of output voltages of load sensors S1-S4 (or output voltages of amplifiers A1-A4) which are linearly changed with respect to a temperature. A detection position (X'i, Y'i), i=1 to 4, which is determined from a ratio of forces when pushing arbitrary four points (X1, Y1), (X2, Y2), (X3, Y3) and (X4, Y4) with a predetermined load F1 at a temperature t°C is determined on the basis of an output voltage corresponding to output of the load sensors S1-S4 according to following expressions of X'i=(Fi1+Fi2)/(Fi1+Fi2+Fi3+Fi4), Y'i=(Fi2+Fi3)/(Fi1+Fi2+Fi3+Fi4). Then, the projective transformation T for transforming (X'1, Y'1), (X'2, Y'2), (X'3, Y'3) and (X'4, Y'4) into (X1, Y1), (X2, Y2), (X3, Y3) and (X4, Y4) is determined. <P>COPYRIGHT: (C)2012,JPO&INPIT |
