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1. (WO2003073050) MULTI- CHANNEL VIBRATION ANALYZER

Pub. No.:    WO/2003/073050    International Application No.:    PCT/IB2003/000739
Publication Date: Sep 4, 2003 International Filing Date: Feb 27, 2003
IPC: G01H 1/00
G01H 1/10
Applicants: EATON CORPORATION
Inventors: SIRRINE, Scott, Anthony
MILLER, Lon, Charles
O'NEILL, Scott, Thomas
JAMES, Frederick, Earl
Title: MULTI- CHANNEL VIBRATION ANALYZER
Abstract:
A diagnostic vibration analyzing system (10) and method for measuring and characterizing the torsional vibrations in a vehicle or a piece of industrial equipment (collectively a 'vehicle'). An electronic control unit (22) and sensor (12) cooperate to measure speed fluctuations occurring between the passing of adjacent teeth of a rotating gear. These time measurements (18) are the basis for displacement, velocity and acceleration calculations which, combined with driveshaft rotational order information, can be used to pinpoint the source of excessive driveline torsional vibrations. The use of multiple sensors (12) can maximize per test the information available for analysis. The use of multiple sensors (12) in a substantially simultaneous manner can isolate particular components in the tested vehicle.