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Ultrasonic anemometry from very to low to high air flow speeds using a cw or long pulse ultrasonic wave
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Dixon, Steve M., Greenshields, David, Li, Z., Sun, W. and Smith, Luke D. (2023) Ultrasonic anemometry from very to low to high air flow speeds using a cw or long pulse ultrasonic wave. In: FLOMEKO 2022 : 19th International Flow Measurement Conference 2022, Chongqing, CHINA, 1-4 Nov 2022. Published in: Proceedings of 19th International Flow Measurement Conference 2022, FLOMEKO 2022 pp. 1-2. ISBN 9781713871989. doi:10.21014/tc9-2022.059
An open access version can be found in:
Official URL: http://doi.org/10.21014/tc9-2022.059
Abstract
Ultrasonic anemometers have a wide dynamic range, no moving parts and potentially high accuracies for measuring wind speed, but can also be used for indoor air flow monitoring. Some designs of ultrasonic anemometer already use flexural ultrasonic transducers (FUTs)- a sensor that is used extensively in car parking sensors as they are low cost, robust and reliable. Ultrasonic anemometers often use a method called transit time difference, where the different transit time generally with or against the air flow gives rise to a transit time difference, that can be used to calculate air flow speed. In most conventional ultrasonic anemometers, each transducer in a pair is pulsed in turn, with one generating whilst the other detects, and then the roles are reversed by multiplexing. The ADC captured signals and are processed using cross-correlation (or similar). Arranging pairs of transducers at different angles facilitates 2D and 3D measurements of air flow speed - the most common being 2D anemometers. Both air flow speed and direction (velocity) can be calculated. Challenges with this approach include that ADC and signal processing needed are relatively power-hungry and expensive.
Item Type: | Conference Item (Other) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Proceedings of 19th International Flow Measurement Conference 2022, FLOMEKO 2022 | ||||
Publisher: | International Measurement Confederation (IMEKO) | ||||
ISBN: | 9781713871989 | ||||
Book Title: | Proceedings of the 19th International Flow Measurement Conference 2022 on Flow Measurement - FLOMEKO 2022 | ||||
Official Date: | 2023 | ||||
Dates: |
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Page Range: | pp. 1-2 | ||||
DOI: | 10.21014/tc9-2022.059 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Free Access (unspecified licence, 'bronze OA') | ||||
Conference Paper Type: | Other | ||||
Title of Event: | FLOMEKO 2022 : 19th International Flow Measurement Conference 2022 | ||||
Type of Event: | Conference | ||||
Location of Event: | Chongqing, CHINA | ||||
Date(s) of Event: | 1-4 Nov 2022 | ||||
Open Access Version: |
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