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Ultrasonic anemometry in rain
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Journal Title
Journal ISSN
Volume Title
Perustieteiden korkeakoulu |
Master's thesis
Electronic archive copy is available via Aalto Thesis Database.
Authors
Date
Department
Major/Subject
Mcode
SCI3106
Degree programme
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