Apparatus for low g-level vibrational pulse detection

Details Apparatus for low g-level vibrational pulse detection Apparatus for low g-level vibrational pulse detection

1981-04-03

1983-03-01

Kreitman, Stephen A.

Measuring and testing

Vibration

Sensing apparatus

73 35, 102427, G01H 1100

Patent

active

043751687

ABSTRACT:
Apparatus is provided for monitoring vibrational activity proximate to a rce of mechanical vibration. The apparatus includes a bridge rectifier which may be positioned proximate to the source, and which provides a voltage output when the source generates a pattern of mechanical vibrations of very low g-level over a brief time interval, such pattern comprising a low g-level vibrational pulse. The apparatus also includes an amplifier coupled to the bridge rectifier for amplifying the voltage output, and further includes a device responsive to the amplified voltage output for providing notice when the source generates a low g-level vibrational pulse. A timing device which is responsive to the amplified voltage output provides a record of the time which elapses between the occurrence of a specified event, which precedes the vibrational pulse, and the occurrence of the vibrational pulse.

REFERENCES:
patent: 3384017 (1968-05-01), Lazarus et al.
patent: 3518941 (1970-07-01), Keithley
patent: 3790927 (1974-02-01), Chwastyk
patent: 3852994 (1974-12-01), Pereda
patent: 3939770 (1976-02-01), Amundson et al.
patent: 3975942 (1976-08-01), Dreitzler et al.
patent: 4112844 (1978-09-01), Held et al.
patent: 4300135 (1981-11-01), Korn et al.
patent: 4301735 (1981-11-01), Menne et al.

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