To provide a rotational deviation detector, capable of reducing the number of templates and similarity calculation.
A control part 40 of the rotational deviation detector is provided with a template part 48 for generating and holding the template for each plural angle points from a reference mark, obtained by picking up a regular subject to be checked on receiving an instruction from an input part 50, an image processing part 42 to process a detection mark of the subject to be checked obtained by picking up the subject to be checked at an image-pickup part 30, a similarity processing part 44 to be superposed on the detection mark of the image processing part 42, by using at least three templates of the template part 48 and to calculate similarity at every angle point respectively on receiving the instruction by the input part 50 and an angle determining part 46 provided with a functional vertex method 20 for calculating a coordinate X0 at the vertex of a function curve (X, Y) to link points of respective coordinates obtained by defining the similarity as a Y-coordinate and the angle point corresponding to the similarity as an X-coordinate from the calculation and to determine a value of the coordinate X0 as an angle value of rotational deviation of the subject to be checked.
| JP2006090950 | MEASURING SYSTEM OF INCLINATION OF SURFACE TO BE TESTED |
| JPH10197228 | SLIT PLATE FOR STEERING ANGLE SENSOR |
ASAI TAKESHI
NISHI HIROISA
