Ultrasonic anemometry in rain
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URL
Journal Title
Journal ISSN
Volume Title
Perustieteiden korkeakoulu |
Master's thesis
Authors
Date
2024-03-11
Department
Major/Subject
Advanced Energy Technologies
Mcode
SCI3106
Degree programme
Master’s Programme in Engineering Physics
Language
en
Pages
46
Series
Abstract
This work aims to identify the issues related to low power ultrasonic anemometry in rain. To begin, the operating principles of ultrasonic anemometers are introduced to the reader with a focus on the time of flight method. The factors that the measurement depends upon are discussed along with the affects of rain on the measurement. The standardisation landscape for anemometer performance in rain is scoped. A range of ultrasonic anemometers were tested at varying wind speeds in rain under laboratory conditions. The performance of each is assessed against operation in dry conditions and the presence of water on transducers is observed to be most detrimental. Finally, mechanical features designed to mitigate the affect of water are evaluated and design considerations are provided.Description
Supervisor
Lund, PeterThesis advisor
Askola, JanneKeitaanniemi, Joonas
Keywords
ultrasound, anemometry, rain, low power