Method and device for machine diagnosis, especially for...

Details Method and device for machine diagnosis, especially for... Method and device for machine diagnosis, especially for...

2005-05-24

2005-05-24

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Lubricant testing

C073S061420, C073S061710, C324S204000

Reexamination Certificate

active

06895808

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 (2) wound on a coil core (11), on the surface of which ferritic wear particles (3) to be detected accumulate. Opposite the coil (2) a rotating toothed wheel (6) is arranged which influences the inductance of the coil (2). The output signal of the coil (2) is pulsed with a constant amplitude, the pulse frequency depends on the rotation speed of the toothed wheel (6). Deviations of the amplitude are attributable to the accumulation of ferritic wear particles (3) on the coil (2) and therefore provide a measurement of the condition of the machine or transmission.

REFERENCES:
patent: 4219805 (1980-08-01), Magee et al.
patent: 5594173 (1997-01-01), Frey et al.
patent: 6435013 (2002-08-01), Rodriguez et al.
patent: 29 33 822 (1986-10-01), None
patent: 44 29 311 (1998-05-01), None
patent: 100 58 844 (2002-06-01), None
patent: 2 029 580 (1980-03-01), None

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