Optical structural health monitoring
US11486697B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Dec 28, 2018 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Dec 28, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30164
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method, system and devices for optical structural health monitoring that implements digital image correlation (DIC) by applying an invisible pattern comprising a random dot pattern and/or codes, which is applied using a coating containing a dye or substance that is not visible during the normal lighting conditions. The structure is imaged at different time intervals by capturing images of the pattern and codes using a camera and suitable light source. The captured images of the pattern and codes are stored in a CAD file that represents the structure or part to which the pattern and codes are applied, and includes the locations of the pattern and codes. Comparative measurements of the pattern and codes (e.g., using DIC) determine one or more structural health parameters, such as strain, deformation, and other stresses or averse conditions that may be detected from one interval to another (e.g., between measurements).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.