Patent ID: 9720087
Date: 2017-08-01
CPC Classifications: G01S

Claim:
1. A method for determining a spatial orientation of a measuring aid object, which has reference features, which are attached in a defined spatial relationship and provide light spots, for and using a laser tracker having: a base, which defines a standing axis, a support, which is pivotable by a motor about the standing axis in relation to the base, a pivot unit, which is rotatable by a motor about a tilt axis in relation to the support, having an image capture unit for capturing an image of the light spots, a radiation source for emitting a laser beam, a distance measuring unit for measuring the distance to the measuring aid object by means of the laser beam, and an angle measuring functionality for determining an emission direction of the laser beam in relation to the base; the method comprising: capturing an image in the direction of the measuring aid object having light spots, which can each be captured in dependence on at least one position and/or on an alignment of the measuring aid object; deriving a spatial orientation of the measuring aid object by means of image analysis from image positions in the image for the light spots captured in the image; defining a local consideration criterion with respect to an appearance of an individual light spot in the image for the image analysis or a global consideration criterion with respect to a position relationship between a number of light spots in the image is defined for the image analysis; performing a check of a fulfillment of the local or global consideration criterion for at least one of the light spots captured in the image; and if the consideration criterion is not fulfilled, weighting the at least one of the light spots captured in the image in reduced form for the derivation of the spatial orientation.