Imaging flame detection system
US5937077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/40
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An imaging flame detection system for detecting flames of fires against false alarms using continuous imaging and pattern recognition of infrared (IR) images of a protected area under surveillance by the system. The system uses a Silicon (Si) Charge-Coupled-Device (CCD) array to detect the IR images, which first have passed through a wide field of view lens to establish a wide surveillance of the protected area, and have been filtered by a narrow band IR filter centered at 1,140 nm wavelength to remove false alarms originated from background sources of the protected area. Then, the system digitizes and thresholds these images into binarized images for pattern recognition to remove any remaining false alarms. To accomplish this function, this process forms blobs of suspect flames from the binarized images, extracts from these blobs characteristic parameters for statistical evaluation of the suspect blobs, matches these parameters with those stored in a system database to establish a vote for a flame or a false alarm, and then declares the suspect blob as a flame when the voting value exceeds an empirically-determined threshold. On a conclusive declaration, the system automatically a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.