Six DOF Measurement in Engineering Constructions and Control Operations in Space

The content of the paper is focused on the six degrees-of-freedom measurement (DOF) of structural dynamic properties in engineering constructions and for control operation in space. Described measurement system is derived from a pyramid modular sensory system for the sampling of six- component information about three axial shiftings and three angular displacements. The subject of this device is the sampling and information processing used in the conversion of four 2-D CCD arrays images into three axial and three angular displacement values. Every CCD array image consists of one light spot produced by light beam from four laser sources. These light beams form the edges of a pyramidal shape with four 2-D arrays forming its base and the origin of the laser sources is forming its apex. The modular design presented here enables easy customization of six DOF measurement by means of three universal portable modules.