Method and Device for Determining the Two-Dimensional Positional Coordinates of a Target Object

摘要

A method for determining the positional coordinates (XM, YM) of a target object (11) in a measurement plane (12) in two dimensions, comprising the steps of:
a target means (13) with a reflector element (31) is positioned at the target object (11),a laser beam is emitted by a transmission element of a laser means (14) along a propagation direction (27) substantially parallel to the measurement plane (12) at the target means (13),at least a part of the laser beam is partly reflected on the reflector element (31),an image of the target means (31[sic; “13”]) is taken by a camera means (15) with the at least partly reflected laser beam as light reflex, with a viewing direction (34) of the camera means (15) being inclined at an elevation angle (φ) to the measurement plane (12),in the image of the target means (13), a focus of the light reflex is determined,from a focal length of the camera means (15), the elevation angle and a first and second image coordinates of the focus of the light reflex in the coordinate system of the camera means, a first and a second distance are calculated, andthe positional coordinates of the target object (11) are calculated from the first and a second distance.

主权项

1. A method for determining the positional coordinates (XM, YM) of a target object (11) in a measurement plane (12) in two dimensions (X, Y), comprising the steps of:
a target means (13) with a reflector element (31) is positioned at the target object (11), a laser beam (44) is emitted by a transmission element (41) of a laser means (14) along a propagation direction (27) substantially parallel to the measurement plane (12) at the target means (13), at least a part of the laser beam (44) is partly reflected on the reflector element (31), an image (61) of the target means (13) is taken by a camera means (15) with the at least partly reflected laser beam (44) as light reflex (62), with a viewing direction (34) of the camera means (15) being inclined at an elevation angle (φ) to the measurement plane (12), in the image (61) of the target means (13), a focus (63) of the light reflex (62) is determined, from a focal length (f) of the camera means (15), the elevation angle (φ) and a first and second image coordinates (Xs, Ys) of the light reflex (62), a first and a second distance (d1, d2) are calculated, the positional coordinates (XM, YM) of the target object (11) are calculated from the first and a second distance (d1, d2).