Error analysis of multi-station and time-sharing measurement by laser tracker

Laser tracker as a three-dimensional measuring instrument has been widely used in industrial measurement. To further improve the measurement accuracy of the laser tracker, the multi-station and time-sharing measurement is adopted. This method is based on GPS principle, and only distance is involved in the measurement to avoid the impact of error caused by angle measurement on the overall measurement accuracy. Taking the detection of motion accuracy in machine tool by multi-station and time-sharing measurement for example, the factors affecting the measurement accuracy are analyzed in-depth, such as time-sharing measurement, measurement layout, the error of instrument, etc. The results will provide a basis for further improve the accuracy of this method.