Development of free curved plate thickness measurement system - Improvement of interpolation for continuous path

A method to generate a high-continuity thickness measuring path has been proposed in our own developed automatic system using laser displacement sensors and an industrial robot to measure and evaluate a free curved plate thickness. Besides the system generates the thickness measuring path on the basis of the point cloud data representing a workpiece shape, in this method, a quaternion is used to represent a change in the measuring posture with squad which is an interpolation algorithm. This paper presents a new method to determine the positions and the postures of the representative points for continuous interpolation. These positions and the postures are determined using 3D Configuration space(C-Space) consisting three parameters for representing the measuring posture. For details, the measurable postures are mapped in the C-Space on each measuring point. Then, the positions of the representative points are determined using a local maximum value of the distance between centroid coordinate of the measurable postures in adjacent points. Moreover, the postures of them are determined using the common postures of adjacent points or the distance from the origin of the C-Space. The continuity of the measuring path is evaluated from the change in the joint angle of the robot. Specifically, angular acceleration of the joint angle is used to evaluate for stabilization of the high-speed robot motion. The experimental result shows that the angular acceleration of the robot joint in generated path is smaller than that of the path generated by a conventional method

Integrated Rapid Prototyping: Efficient Development of Custom Orthotics

Integrated Rapid Prototyping (IRP) is a systematic approach of optimizing product development from conception to realization, a process which we defined by the combination of 3D Digitization, 3D Modeling, Finite Element Methods, Additive Manufacturing, and Non-Destructive Testing. IRP has numerous applications, from consumer accessibility to industry level manufacturing. Our process was applied to the medical field through the creation of a custom orthotic device. A process done by using leg scans from a portable scanner, designing an orthotic model, analysis, fabrication via additive manufacturing, and product testing. Through this application, the development process was validated and analyzed by considering material characteristics, surface metrology, and full field optical techniques

A Summary of the Naval Postgraduate School Research Program, 1986

This report contains 227 summaries of research projects which were carried out under funding to the Naval Postgraduate School Research Program. This research was conducted under the areas of Computer Science, Mathematics, Administrative Sciences, Operations Research, National Security Affairs, Physics, Electrical and Computer Engineering, Meteorology, Aeronautics, Oceanography, and Mechanical Engineering. The table of contents identifies specific research topics.Approved for public release; distribution is unlimited

The establishment of soft tissue thicknesses and profiles for reconstruction of the adult male Zulu face

A thesis submitted to the Faculty of Dentistry, University of the Witwatersrand, Johannesburg, for the Degree of Doctor of Philosophy. 1993Three-dimensional forensic facial reconstruction involves the building up in clay of the soft tissues of the human face onto an unidentified skull to suggest the identity of its owner. Early researchers physically punctured the facial tissues of cadavers at known anthropological to measure their depth. Later workers used radiography, ultrasonography and magnetic resonance imaging for collecting both depth and surface data on the head and face.GR 201