Full-Field Vibration Intensity Chromatographic Analysis Based on Vision Measurement for Rotating Machinery

Abstract

AbstractWith the rapid development of the vision-based measurement, the demand for the global vibration measurement becomes increasingly urgent. This paper proposes a novel full-field vibration intensity analysis approach on the basis of the phase-based motion extraction method for the integral structural vibration measurement. First, local vibration signals can be extracted by the phase-based method. Then a global vibration matrix can be built by the preprocessed local vibration signals. Finally, full-field vibration intensity chromatograms can be obtained according to the vibration matrix through normalization and visualization. Additionally, a series of controlled experiments was conducted on a maglev motor. To verify the accuracy, vibration is measured by high-speed cameras and accelerometers. The experimental results demonstrate that the proposed approach is feasible to reflect the global structural vibration and suitable for the further global measurement application.KeywordsNoncontact measurementVibration measurementGlobal measurementHigh-speed cameraPhase-based optical flowRotating machinery