Ultrasound Measurement Technique for Validation of Cryogenic Flows†
Institute of Sensor and Actuator Technology (ISAT), Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany
*
Author to whom correspondence should be addressed.
†
Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.
Proceedings 2018, 2(13), 1090; https://doi.org/10.3390/proceedings2131090
Published: 11 December 2018
(This article belongs to the Proceedings of Eurosensors 2018)
PDF [656 KB, uploaded 11 December 2018]
Abstract
An ultrasound sensor system based on the transmission-mode approach is developed to enable the monitoring and sensing of cryogenic liquids and gases—especially gaseous bubbles and gas-liquid interfaces in liquid nitrogen (LN2). Common sensors do not meet requirements of cryogenic and microgravity-environments. Therefore, a special encapsulation design for the optimization of the electrical connection and the mechanical coupling of the ultrasound sensors is needed. The ultrasound system is qualified in LN2 and is able to measure bubbles (size and location) and fill levels with a high spatial resolution in a submillimetre range and a sampling rate of more than 500 Hz.Keywords:
ultrasound transmission; flow imaging; cryogenic two-phase flow; gas and liquid flow; ultrasound tomography; cryogenic ultrasound sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Becker, D.; Schmidt, R.; Lindner, G.; Drese, K.S. Ultrasound Measurement Technique for Validation of Cryogenic Flows. Proceedings 2018, 2, 1090.
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