Papers by Author: Erwin Christian Lovasz

Abstract: The paper describes an equipment specialized in digitization of single documents, journal-type documents and books. The equipment is designed and assembled at Politehnica University of Timisoara and works in a station developed within the European project thinkMOTION. The optical calculus aimed optimal illumination of two symmetrical areas and high quality of captured images. The object of scanning is printed matter, which exists exclusively in paper form and originates from different periods of scientific evolution. The mechanical design was based on criteria such as: flatness of active surfaces, quick placement and removal of the original document, mechanical raw focusing facilities, adjustment regarding the thickness of the original document and finding constructive solutions so that no damage is inflicted upon the original document, which may be one of a kind and, hence, historically very valuable. An original software was created in order to control the scanning process, to organize files and folders, which stock captured images in different stages of processing. The effective efficiency of the equipment is 10 12 pages/minute.

Abstract: This paper describes an overview regarding library automation and present possibilities to handle books using robots in the context of library activities. In this context, library automation is referring to hardware and software systems that are implemented in the library process activities in order to automate book handling applications. Some similar developments are presented. Also, two CAD models of the proposed book manipulator using linear drives are presented.

Abstract: In the last two decades most information sources both old and new were digitized or prepared directly in digital form. This process allows a better accessibility and visibility of information throughout the world. In order to find useful information easily and quickly, it is important to have a coordinated search engine. The paper deals with the development of a demonstrative digital technical library. The controlled search engine is based on the multilingual illustrated micro-thesaurus in the technical field of mechanisms science according to the librarian indexation rules. Some search possibilities are presented.

Abstract: The paper proposes two methods for kinematic analysis of a belt mechanism with circular eccentric output element (link). One of them is based on the mechanisms geometry and the second on its kinematics in order to obtain the transmission functions of different order. Both approaches are based on a imaginary cam mechanism instantaneous isokinetic with the given belt mechanism. The transmission functions obtained by means of proposed procedures are in a numerical form due to the finite incremental method used in solving the problem.

Abstract: The manipulators, used to handling products or devices in industrial departments, needs to be self-balanced in order to compensate the different weight of the load in its position in the workspace. The known technical solution for self-balancing with counterweight, springs and actuators can be substituted through a band mechanism. The paper proposed a new self-balancing solution for the conco-balancer manipulator with band mechanism and presents its synthesis approach. The non-circular profile of the band mechanism permits the variation of the compensated moment in order to be easy manipulated the load by the operator.

Abstract: In this paper is presented the 3D acquisition and reconstruction process of complex geometry objects: two types of hip and cervical-cephalic prosthesis. The reconstruction process is based on triangulation single camera solution method with a 3D optical non-contact scanner which uses an emitted laser beam to sweep the object surfaces.