Measuring and testing – Vibration – By mechanical waves
Patent
1981-03-26
1983-06-07
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73660, G08B 2100
Patent
active
043865267
ABSTRACT:
A method for the quality control of processes and construction components by diagnosing their sound vibrations during a predetermined period of time. The invention has the purpose of objectively and reliably evaluating acoustic vibrations, independent of the subjective evaluation of monitoring personnel, which can also detect very fine differences in the vibration behavior of the monitored device at an early time. To this end, the invention provides two possible solutions. In one method according to the invention, the oscillation height (.DELTA.A.sub.1 . . . .DELTA.A.sub.n) of the amplitudes of the signals are measured, depending upon a predetermined discharge time of an integrator (FIG. 1). In a second method, the impulse density of those impulses of the signal which exceed a predetermined threshold value (S) are measured.
REFERENCES:
patent: 3745815 (1973-07-01), Bentone et al.
patent: 3798626 (1974-03-01), Weichbrodt
patent: 3913084 (1975-10-01), Bollinger et al.
patent: 3979739 (1976-09-01), Birchall
patent: 4006625 (1977-02-01), Davis
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