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Title: Development of Micro-Scale Anemometer
Author: Sheng-Cyuan Fan Jiann-Hua Jeng Ying-Chun Lin Jiunn-Haur Shaw
Source: 2018 International Symposium on Fluid Flow Measurement
Year Published: 2018
Abstract: The objective of this research is to design a low speed micro anemometer with wind speed ranging from 0.01 m/s to 1 m/s and the resolution is 0.01 m/s. This paddle-type cantilever structure is made of polyethylene terephthalate (PET), with the upper cantilever layer coated with a layer of resistive nickel-chromium alloys. As the force induced by the air motion applies to the cantilever structure, deformation of it results in change in the resistance of the nickel-chromium alloy. Based on this principle, authors developed a micro anemometer modeled with theoretical analysis and wind tunnel verification. In this paper, a mathematical model, starting from a stress-strain relationship, for variations of resistance of the upper Ni-Cr alloy against deformation of the micro cantilever is presented. A formulation for parameter of geometric dimensions and material, in associate with the resistance variation, is further developed. A prototype was then made based on the analysis and tested in a standard wind tunnel at wind speeds ranging from 0 m/s to 5 m/s. The test results will be used for further study in order to improve for revision of the low speed micro anemometer.




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