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Martin Molitor, Veit Stockmann
New Opto-electronic Incremental System for Implementation in Magnetic Bearings
For the application in mechanical engineering a magnetically levitated manufacturing system using the TransRapid magnetic bearing principle has been developed. Because of the free levitation of the rotor and the complete freedom of motion of the system, only a non-contact measuring system could be applied for the high precision determination of the angle of rotation. This system has to be tolerant above the air gap and should still provide accurate values with high velocity. Therefore it was necessary to develop a novel technology for the control of the angle of rotation. This technology bases on an incremental measuring device. It uses trapezoid structures as increments which are scanned by transmitted light. The practical investigation work to determine the features of this measurement method took place in two ways. On the one hand a laser-scanner had been used to prove that a high definition can be realised with this new measuring principle. On the other hand a matrix camera came into operation to simulate the potential of measuring speed. On the basis of these results a practical realisation of this device in combination with magnetic bearings will be developed.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 71, 07/2004
Pages: 398 - 403