Visually determining vibrometric behavior of aerial vehicles
US10861164B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2019 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | May 31, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30248
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Natural frequencies of vibration of objects, such as aerial vehicles, are identified based on imaging data captured while the objects are subjected to excitation. The imaging data is captured using high-speed cameras, and changes in intensities of pixels corresponding to surfaces of the object are used to determine a spectral diagram of the vibrations from which natural frequencies of vibration (e.g., vibration modes) are determined. The visibility of the vibrating objects is enhanced by providing video images to band-pass filters within small bands around the natural frequencies, and magnifying the vibration based on the amplitudes or phases determined from each of the video images. A stream of the modified video images may be used to determine a mode shape corresponding to the vibration of the objects at or around a natural frequency of vibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.