摘要 |
<p>Disclosed is a measuring system comprising a laser tracker (10), a target point marked by a reflector (12), a surveying apparatus (13), and an arithmetic and control unit (14). The laser tracker emits a measuring beam (M) which is reflected by the reflector, a process that is used for determining the distance between the laser tracker (10) and the reflector (12). The surveying apparatus has a known position and orientation relative to the measuring beam (M) while preferably being embodied as a survey camera. The inventive measuring system is designed so as to track the reflector (12) via the measuring beam (M). In a normal tracking mode (A), a measured value for controlling the orientation of the measuring beam (M) is derived from the detection of the measuring beam reflected by the reflector (12). If the measuring beam is not directed onto the reflector, i.e. the measuring beam (M) is not reflected by the reflector and thus no reflected measuring beam can be detected by the laser tracker, the system switches to a special tracking mode in which the measured value for controlling the orientation of the measuring beam (M) is derived from an image (20) of the survey camera (13).</p> |