Flame detector
US6346712B1 · kind B1 · utility
28Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N5/082
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A flame detector with a radiation sensor (1) sensitive in the ultra-violet and/or visible range of the electro-magnetic spectrum, forms from the signal U1 at the output of the radiation sensor, a first signal U2 which is proportional to the direct voltage portion of the signal U1, and a second signal U3 which is proportional to the alternating voltage portion of the signal U1. The output signal UA of the flame detector is formed such that UA=U2−U3. Ignition sparks can thereby be effectively suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.