| 主权项 |
1. A method for determining a closed trajectory curve (10) by a laser (12) and a laser light sensor (14) having a flat field of view (16),
wherein the field of view (16) has a coordinate system (18) with an X coordinate axis (20) and a Y coordinate axis (22) at a right angle to the X coordinate axis (20), with the laser light sensor (14) being set up so as to record on the field of view (16) the X coordinate and Y coordinate of the position of the laser light spot (24) of a laser light beam (26) of the laser (12) impinging on the field of view (16), wherein the method comprises the following steps: (A) Arrangement of the field of view (16) in a circular cylindrical bore (36) of a body (39) and conveying of the field of view (16) into a first position; (B) Irradiation of the field of view (16) with a laser light beam (26) generated by the laser (12) and recording of the X coordinate and Y coordinate of the position of the laser light spot (24) of the laser light beam (26) that the laser light spot (24) assumes on the field of view (16); (C) Conveying of the field of view (16) in temporal succession into at least two further positions, irradiation of the field of view (16) with the laser light beam (26) in each of the further positions and recording of the X coordinate and Y coordinate of the positions of the laser light spot (24) of the laser light beam (26) that the laser light spot (24) assumes on the field of view (16) in each of the further positions, wherein, in the first position and also in each of the further positions, the X coordinate axis (20) and the Y coordinate axis (22) are oriented at a right angle to the center axis (38) of the bore (36) and the origin (51) of the coordinate system (18) has a predetermined distance from the inner surface (46) of the bore (36) in the direction of the X coordinate axis (20) or the Y coordinate axis (22), wherein further positions differ in terms of the magnitude of the positional angle (φr) at which the Y coordinate axis (22) or the X coordinate axis is inclined in a predetermined direction of rotation (44) with respect to the Y coordinate axis (22) or the X coordinate axis (20) of the field of view (16) in the first position, and wherein the field of view (16) in step (C) is conveyed in temporal succession into the at least two further positions in such a way that the positional angle of each of the further positions is greater than the positional angle of each temporally previously assumed position, with, in the temporally last assumed position, the magnitude of the positional angle being at least 90 degrees; (D) Assignment of zero degrees to the value of the positional angle of the X coordinate and Y coordinate recorded in the first position of the field of view (16); (E) Determination of the closed trajectory curve (10) by means of the X coordinate recorded in step (B) and (C) and/or the Y coordinate recorded in step (B) and (C), wherein, in step (E), furthermore, a plot of the trajectory curve (10) is determined on the basis of the recorded X coordinate and/or the recorded Y coordinate, said plot being parameterized by the positional angle of the field of view (16), which is measured starting from a positional angle value of zero degrees in the direction of the predetermined direction of rotation. |
