Vibration level sensor

Details Vibration level sensor Vibration level sensor

2006-02-14

2006-02-14

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid level or depth gauge

C073S29000R

Reexamination Certificate

active

06997052

ABSTRACT:
A filling level sensor comprises a tunable electrical resonant circuit, a mechanical oscillator that can be excited to resonance oscillation by the resonant circuit, and a control circuit for tuning the resonant circuit to a resonance frequency of the mechanical oscillator. A device for comparing the amplitude of the mechanical oscillator with a minimum value ascertains a malfunction of the mechanical oscillator if its amplitude falls below the minimum value.

REFERENCES:
patent: 5895848 (1999-04-01), Wilson et al.
patent: 6389891 (2002-05-01), D'Angelico et al.
patent: 30 44 354 (1982-03-01), None
patent: 198 35 370 (2000-10-01), None

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