一种基于视频相位放大反馈的微振动测量方法及系统
By employing a video phase amplification feedback method, combined with image smoothing and energy maximization selection strategies, the problem of poor robustness of visual measurement methods in noisy environments is solved. This enables high signal-to-noise ratio extraction and visualization of micro-vibration signals, thereby improving measurement accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN ENG UNIV
- Filing Date
- 2022-09-19
- Publication Date
- 2026-07-17
AI Technical Summary
Existing vision-based micro-vibration measurement methods are not robust in noisy environments, resulting in poor measurement results. In particular, they are difficult to accurately extract micro-vibration signals when the imaging quality is low, the lighting is insufficient, or the camera system is noisy.
A video phase amplification feedback method is adopted, which extracts and amplifies vibration signals by image smoothing, variance-based energy maximization selection strategy and variational mode decomposition, combined with phase alignment and cross-correlation calculation, and constructs a feedback processing system to improve the signal-to-noise ratio.
The visualization and accurate extraction of micro-vibration signals were achieved in high-noise environments, improving the accuracy and reliability of measurements and enabling the accurate extraction of weak vibration signals in complex environments.
Smart Images
Figure CN115560841B_ABST