Patent · US Active

Process for measuring a fill level or limit state, circuit for a device that measures a fill level or limit state, and device that measures a fill level or limit state

US8201447B2 · kind B2 · utility

1Cited by

1References

9Claims

0Family size

Assignee

VEGA Grieshaber KG · DE

Inventors

Joerg Boersig · Schapbach, DE
Josef Fehrenbach · Lenzkirch, DE
Martin Mellert · Steinach, DE

Key dates

Filing date	Aug 5, 2009
Grant date	Jun 19, 2012
Priority date	—
Expiry date	Oct 7, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01F23/2967
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Measuring a fill level or limit state is performed using an electromagnetic vibrating system, in which a transmission signal(s) is generated. A vibrating body (20) is excited into a state of vibration by the transmission signal (s); and by means of the reception signal (e) that is then produced by the vibrating body (2) the transmission signal (s) is modified for at least one subsequent excitation of the vibrating body (2), while a natural frequency (fe) of the vibrating body—or a magnitude (te) dependent on the natural frequency (fe)—is determined from the reception signal (e), and the transmission signal (s) is thereby modified.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.