Analytical tachometers

Details Analytical tachometers Analytical tachometers

G - Physics

01

M

G01M 15/00 (2006.01) G01H 11/06 (2006.01) G01M 15/10 (2006.01) G01M 15/12 (2006.01) G01P 3/48 (2006.01) F02B 1/04 (2006.01)

Patent

CA 2167900

Method and apparatus for engine and rotary machine analysis provides a vibration sensor adapted to produce a plurality of superimposed waveforms corresponding to engine or machine operating parameters including rotational speed. The signals are transmitted by an RF transmitter/receiver system in analogue modulated form to a data capture and analytical function utilising a software sub-system in which a power spectral density plot is produced containing a signature characteristic of the engine or other machine under test. This signature is recognised by a signature detect algorithm which can recognise and trace the signature across the frequency spectrum covered by the apparatus so as to provide a continuous tachometric function not requiring the filtering-out or other removal of irrelevant data. A diagnostic function arises from detection of the presence of additional harmonic peaks within the signature. A capacitive coupling offers a simplified tachometric function based upon low voltage signals in the injector leads to a spark ignition engine.

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