Description
This presentation reviews the project “Alignment of Antenna Measurement Facilities with Machine Vision Technology”. Different approaches for using a machine vision tool in performing antenna and probe positioner mechanical alignment are presented and compared. A machine vision alignment system for aligning a spherical roll-over-azimuth setup, based on fitting coordinate data to a geometrical model, is presented. A detailed description of the alignment steps and derivation of the model equations for this alignment system are given. Procurement and maintenance complexity and costs are assessed for different solutions. Obtainable accuracy and its influence on antenna measurement uncertainty are also estimated and compared for different approaches.
The picture shows the AUT positioner and probe tower of the DTU-ESA Spherical Nearfield Antenna Test Facility and the adjustment tools for mechanical alignment of vertical axis, horizontal axis on AUT positioner as well as probe positioning and pointing on probe tower. One or more of such mechanical alignments are generic and can be found in most antenna measurement facilities.
