Apparatus for harmonic oscillation analysis

Details Apparatus for harmonic oscillation analysis Apparatus for harmonic oscillation analysis

1980-05-06

1983-12-13

Kreitman, Stephen A.

Measuring and testing

Vibration

Sensing apparatus

G01H 100

Patent

active

044198973

ABSTRACT:
Apparatus for harmonic oscillation analysis includes a detector for taking up, as electric oscillation, mechanical vibration generated during the operation of a rotary machine system, a comb filter for extracting from the detector's output signal having a composite periodic oscillation wave form only fundamental wave component of a determined fundamental frequency fo and its harmonic wave component, and a clock pulse generator for generating clock pulses to drive the comb filter by the clock pulse having the fundamental frequency fo and a discriminator for evaluating abnormality of the rotary machine system depending upon the particular signal components extracted through the comb filter.

REFERENCES:
patent: 3971249 (1976-07-01), Bachofer
patent: 4196629 (1980-04-01), Philips
patent: 4213346 (1980-07-01), Polovnikov et al.

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