Processing of Complex Modulated Ultrasonic Signals in Gas Flow Metering

O. Ricken; Volker Hans

doi:10.4028/www.scientific.net/KEM.381-382.615

Paper Titles

Using of Validated Software for Uncertainty Analyses Tools in Accredited Laboratories
p.599

Universal Designed Structures for Strict Pitch Measurements Using Scanning Probe Microscopes
p.605

An Intelligent Design for Foot Orthoses
p.607

Study on In-Process Detection and Diagnosis of Faults Arc Based on Early Sounds Signature and Intermittent Chaos
p.611

Processing of Complex Modulated Ultrasonic Signals in Gas Flow Metering
p.615

Investigation on the Noise Separation in Watt Balance Experiments
p.619

Advanced Analog-to-Digital Conversion Using Voltage-to-Frequency Converters for Remote Sensors
p.623

Correlation Processing of the Signals of the Single-Fiber Intermode Interferometer with a Small Number of Excited Modes
p.627

Research on Automatic Flaw Classification and Feature Extraction of Ultrasonic Testing
p.631

HomeKey Engineering MaterialsKey Engineering Materials Vols. 381-382Processing of Complex Modulated Ultrasonic Signals...

Processing of Complex Modulated Ultrasonic Signals in Gas Flow Metering

Abstract:

In ultrasonic gas flow metering the ultrasonic wave is complex modulated by natural or artificial structures in the fluid. The determination of the shifted phase angle makes problems if the limited range of the arctan-function is exceeded. It results in phase jumps and ambiguities of the phase angle [1]. This paper presents a new method of phase angle determination which is called differential procedure [2]. The differential procedure has been proved good to determine undersampled ultrasonic data in a wider range of phase shift. The expanded range of phase angle is advantageous for vortex measurement as well as for correlation measurement. Phase and amplitude modulation are physically mutually connected. Phase modulation corresponds to frequency modulation and results in connection with the receiving response of the ultrasound sensor in an additional nonlinear amplitude modulation.

You might also be interested in these eBooks

Measurement Technology and Intelligent Instruments VIII

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 381-382)

Pages:

615-618

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.381-382.615

Citation:

Cite this paper

Online since:

June 2008

Authors:

O. Ricken, Volker Hans

Keywords:

Complex Demodulation, Differential Procedure, Gas Flow Metering, Signal Processing, Ultrasound (US)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] V. Hans: Signal Processing of Complex Modulated Ultrasonic signals, Fluid Mechanics of Flow Metering, ed. W. Merzkirch, Springer, 5 (2005), 7 -94.

DOI: 10.1007/3-540-26725-5_5

Google Scholar

[2] O. Ricken: Verarbeitung komplex modulierter Ultraschallsignale bei Wirbelfrequenz- und Korrelationsverfahren zur Durchflussmessung, PhD thesis, University of Duisburg-Essen, Shaker, (2007).

Google Scholar

[3] V. Hans, and E. v. Lavante: Vortex Shedding Flow Metering Using Ultrasound, Fluid Mechanics of Flow Metering, ed. W. Merzkirch, Springer, 5 (2005), 95-110.

DOI: 10.1007/3-540-26725-5_6

Google Scholar

[4] Massa, Hingham, MA/USA. Datasheet E-188, www. massa. com/datasheets/e188. html.

Google Scholar