The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2005
Filed:
Jul. 03, 2003
Hubert Remmlinger, Friedrichshafen, DE;
Robert Ingenbleek, Kressbronn, DE;
Gabriele Schuwerk, Ravensburg, DE;
Rolf Schmitz, Friedrichshafen, DE;
Hubert Remmlinger, Friedrichshafen, DE;
Robert Ingenbleek, Kressbronn, DE;
Gabriele Schuwerk, Ravensburg, DE;
Rolf Schmitz, Friedrichshafen, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
The present invention concerns a method and a device for machine diagnosis and, in particular, for transmission diagnosis in a machine or motor vehicle. The measurement system, according to the invention, comprises a coil () wound on a coil core (), on the surface of which ferritic wear particles () to be detected accumulate. Opposite the coil () a rotating toothed wheel () is arranged which influences the inductance of the coil (). The output signal of the coil () is pulsed with a constant amplitude, the pulse frequency depends on the rotation speed of the toothed wheel (). Deviations of the amplitude are attributable to the accumulation of ferritic wear particles () on the coil () and therefore provide a measurement of the condition of the machine or transmission.