逐次更新型FFTを利用したタコメータの実現に関する検討

概要

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[Abstract] Handy tachometers are utilized to maintain the well workings of electric motors in various plants. The major two systems of frequency counter type and spectrum analyzer type are commonly used for the tachometers. The latter type has many advantages over the former, but it needs costly devices to process the complex calculations. Therefore, our new deductive FFT algorithm rises the possibility to make the implementation simple and reduce the computational cost. However, its deductive algorithm has a problem that computational errors grow by time. This paper describes an examination using a miniature motor to verify whether the computational error spreads or not. As a result, it was indicated that the test system keeps stable during 20 seconds. It is enough for the application of handy tachometers.
近畿大学工業高等専門学校の論文