Presentation on theme: "Micro-triangulation for high accuracy short range measurements of dynamic objects Vasileios Vlachakis 1 st PACMAN Workshop 2 - 4 February 2015 CERN, Geneva,"— Presentation transcript:
Micro-triangulation for high accuracy short range measurements of dynamic objects Vasileios Vlachakis 1 st PACMAN Workshop 2 - 4 February 2015 CERN, Geneva, Switzerland
2 Outline What we measure?Angles What we can do with such observations?Geodetic Networks How precise the system can be?Micrometres Why μ-Triangulation and QDaedalus?O bject T arget R ecognition What this system can contribute to PACMAN?Fiducials + Wire Are there any potential for improvement?Yes, as always!
QDaedalus Developed at the Institute of Geodesy and Photogrammetry, ETH Zurich Consists of hardware and software developments Replaces eye piece with CCD camera, non destructively Object Target Recognition
Why micro-triangulation and QDaedalus has been chosen for this project? Using the OTR, in principle it can measure whatever is visible (emits radiation) (images of targets) Can measure spheres (fiducials) Has the potential to measure the stretched wire Can measure even well machined holes on the objects Can measure targets around the object in case we need absolute reference frame (image of module+instruments) Why QDaedalus in PACMAN? Object Target Recognition (OTR) Can measure spheres Can measure circles Can possibly measure the stretched wire
How μ-Triangulation can contribute to PACMAN? Can measure targets (fiducials) and the stretched wire in a common coordinate system
Which are the main advantages? Portable metrology solution Automatic measurements Without observer, remote control, cheap targets Massive measurements Accurate measurements High precision instruments, targets and algorithms Without human error Low cost
Software improvements Improve Graphical User Interface (GUI) Upgrade QDaedalus - LGC communication (input, output) Visualize network adjustment results
Leica Nova TS50 Hardware improvements Control several instruments simultaneously Develop online, remote control Reduce cabling / increase precision and portability
Algorithms improvements Enhance auto-focus functionality Implement automatic intensity adjustment Drive instrument through the image Improve points management
Stretched wire detection & measurement Combine focusing techniques Determine which pixels depict the centre of the wire (image processing) Extract angle measurements Estimate the plane (surface) that passes through the wire and the instrument Reconstruct the wire as a section of these planes (surfaces) Calculate the precision of the measurement Compare results with FSI and CMM
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