P22 - Flow Measurement by Means of Wideband Ultrasonic Signals in Acoustic Waveguides
- Event
- iCCC2024 - iCampµs Cottbus Conference
2024-05-14 - 2024-05-16
Cottbus - Band
- Poster
- Chapter
- Sensorik
- Author(s)
- J. Monsalve, M. Jongmanns, S. Koch - Fraunhofer IPMS, Dresden , H. Schenk - Brandenburgische Technische Universität Cottbus-Senftenberg, Cottbus
- Pages
- 186 - 189
- DOI
- 10.5162/iCCC2024/P22
- ISBN
- 978-3-910600-00-3
- Price
- free
Abstract
An alternative method to measure flow (and speed of sound) in a duct with ultrasound is presented, not based on the high-frequency emission of a pulse across the duct’s diameter but on the lowfrequency emission of a wave packet across the duct’s length. MEMS electrostatic transducers were implemented to transmit wideband signals that lead to a robust time delay estimation via crosscorrelation. Measurement of the speed of sound was consistent with an alternative sensing method, and that of flow velocity was consistent with the waveguide’s dimensions.