Dispositivo tastatore, marker per dispositivo tastatore e sistema di misura per effettuare misure fotogrammetriche di oggetti di grandi dimensioni (Feeler device, marker for a feeler device and system for taking photogrammetric measurements of objects)

The present invention relates to the field of coordinate measurements in the three-dimensional (3D) space to be taken on large objects (ranging from one meter to a few tens of meters in size) by using photogrammetric techniques. In particular, the invention relates to a feeler device for photogrammetric measurements, which can provide, with a high degree of accuracy, the three-dimensional coordinates of points touched by the feeler on the surface of an object being measured, by using as a reference a photogrammetric system consisting of high-resolution digital cameras with high depth of field. The invention further concerns a marker for such a feeler device and a measurement system for taking photogrammetric measurements, which allows obtaining accurate measurements on the object to be analyzed.