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Condition monitoring technique of rotating machinery using K‐band Doppler radar
Author(s) -
Im YunTaek
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31018
Subject(s) - radar , doppler radar , harmonics , doppler effect , continuous wave radar , acoustics , harmonic , pulse doppler radar , radar engineering details , wavelength , pulse repetition frequency , electronic engineering , remote sensing , physics , engineering , optics , electrical engineering , radar imaging , telecommunications , geology , voltage , astronomy
A condition monitoring technique using Doppler radar is proposed for rotating machinery. An analysis of the fundamental and harmonic signals is based on the Bessel functions. To measure the vibration signals, a compact K‐band (24.125 GHz) CW radar module is used, and an experiment was carried out to observe the spectral response of a motor at 1190 RPM, where the measurement direction is horizontal. From the spectral responses, the fundamental frequency, or harmonics, is related to the RPM of the rotating machinery. The proposed Doppler radar is the simplest radar, and therefore the condition monitoring system can be easily implemented in a low cost way. In addition, the radar is less sensitive to scattering because the wavelength is much shorter than the wavelength of the LDV, and thus this behavior is suitable for an outdoor installation of the condition monitoring system.