Measurement device for determining the position and orientation of moving platform on parallel kinematic linkage employs reference object and laser beams

摘要

A reference piece (14) is mounted on a moving platform and carries three bars (7). Transmitters (10,11) located at right angles to one another project a laser beam through the bars so that rows of light are interrupted by the bars forming shadow images picked up by facing receivers (12,13). The bars are arranged relative to one another so that no lines intersect and the received images can be processed electronically to adjust the platform position