Patent · US Active

Fill level measurement with improved distance determination

US9958310B2 · kind B2 · utility

0Cited by

5References

13Claims

0Family size

Assignee

ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

Harald Faber · Lörrach, DE
Winfried Mayer · Hobrechtsfelde, DE
Alexey Malinovskiy · Maulburg, DE

Key dates

Filing date	Apr 22, 2014
Grant date	May 1, 2018
Priority date	—
Expiry date	Oct 20, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01S7/356
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for determining frequency components of a discrete time signal, comprising steps as follows: transforming the discrete time signal into the frequency domain by means of a fast Fourier transformation, wherein a frequency spectrum is obtained as a sequence of frequency sample values, detecting peaks in the frequency spectrum, introducing at least one additional frequency support point in the vicinity of a detected peak, determining a frequency amplitude at the at least one additional frequency support point by means of the Goertzel algorithm, and determining the position of the peak maximum of the detected peak by applying both the frequency sample values delivered by the fast Fourier transformation as well as also the frequency amplitude at the at least one additional frequency support point.

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