Calibration of a 3D working space by multilateration

• DOI: 10.1016/j.precisioneng.2015.11.005
• Publication Date: 2015-12-15T21:37:27Z
• Authors: Martin Camboulives; Claire Lartigue; Pierre Bourdet; José Salgado
• Keywords: Reflector (photography); Visibility; Laser tracker; Total station

Abstract This paper deals with a calibration procedure of a 3D working space based on multilateration using a unique tracking interferometer. The key point of the procedure, detailed for a Cartesian CMM, is the definition of a reference measuring system built from the successive locations of a single tracer independently of the machine kinematics. Procedure limits are thus highlighted and can be classified into three types: limits of the devices (interferometer and measuring rule performances), limits linked to the use of a single tracer (reflector reorientation for visibility purposes), and limits linked to the algorithm. To evaluate associated uncertainties, a virtual measurement module has been developed which simulates a realistic 3D calibration and allows the study of the influence of each uncertainty component on the calibration procedure. The approach applied to the calibration of a virtual CMM proves that the simulation module is an efficient tool to investigate uncertainties associated with calibration procedures based on multilateration using a single tracer.