Mechanical vibrator

Details Mechanical vibrator Mechanical vibrator

1985-11-15

1987-07-21

Kreitman, Stephen A.

Measuring and testing

Vibration

Sensing apparatus

G01H 900

Patent

active

046809686

ABSTRACT:
A mechanical vibrator for resonance operation, and particularly well suited for use with a beam chopper, comprises a mechanically stiff vibrator arm representing a fixed mass. A spring with a fixed spring constant is attached to and acts upon the vibrator arm. The vibrator arm and the spring comprise a mass/spring system. A drive means is connected to the vibrator arm and has a positive feedback circuit for self-excitation at the resonance frequency of the mass/spring system. At least one first magnetic system is arranged on the vibrator arm and at least one second magnetic system is located off the vibrator arm in operational connection with the first magnetic system for measuring and/or influencing the time ratio of the two half waves (t.sub.o, t.sub.g) of the vibration amplitude waveform of the vibration arm.

REFERENCES:
patent: 2940306 (1960-06-01), Lozier
patent: 4567771 (1986-02-01), Nelson et al.

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