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Ink jet space-time recorder

Grant number: 99/06249-1
Support type:Research Grants - Innovative Research in Small Business - PIPE
Duration: October 01, 1999 - August 31, 2002
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Yoshikazo Ernesto Nagai
Grantee:Yoshikazo Ernesto Nagai
Company:Optron Micromecânica Óptica Ltda. - ME
City: Campinas


The present research project is intended to develop an alternative to the high-voltage sparker used in classical mechanics experiments: a space-time recorder based on the same principle and the head of an ink-jet printer with a piezoelectric element. Classical mechanics experiments in schools and universities, when offered, are generally trivial and with conceptually poor content, in contrast to the elegance with which the theory approaches and solves teaching problems, making use of conservation laws such as linear moment. Nonetheless, for direct proof of such straightforward laws as these, equipment is required. Tracks and air tables minimize the effect of attrition, maintaining a fine layer of compressed air between the moving part and the surface over which it slides. Furthermore, they are equipped with high- voltage space-time recorders leaving fine black dots on waxed paper (or fax paper) over the trajectory and periodically over time. A dangerous inconvenience of this type of apparatus is the high voltage present throughout its length. Fed by common batteries, the space-time recorder here planned could be built in to the moving part, thus avoiding any impediment to the movement. The rest of the equipment would be the same as the conventional track or air table. (AU)