Method and apparatus for diagnosing machine condition

Details Method and apparatus for diagnosing machine condition Method and apparatus for diagnosing machine condition

1983-11-15

1985-07-23

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73660, G01N 2904

Patent

active

045302405

ABSTRACT:
For use in predicting machine failure a transducer sensor, such as piezoelectric crystal, is applied to a machine for sensing machine motion and structure borne sound, including vibration friction, and shock waves. The structure borne sound and motion sensed is converted to electrical signals which are filtered to leave only the friction and shock waves, which waves are processed, as by detecting the envelope and integrating beneath the envelope, resulting in a measure of friction and shock wave energy. This measure may be compared with that of a less used machine, say the same machine when new, to indicate the rise in energy due to change in machine parts.

REFERENCES:
patent: 3554012 (1971-01-01), Sohoel
patent: 3842663 (1974-10-01), Harting et al.
patent: 4429578 (1984-02-01), Czechowski

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