Adaptive noise silencing system of combustion apparatus
US5445517A · kind A · utility
72Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1993 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Oct 13, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/32121
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Pressure variation of combustion noise is detected by a microphone set in a combustion chamber, and the pressure propagation characteristic for the path from the gas flow control valve to the microphone is identified while the combustion apparatus is operating, and then an adaptive control is made using one signal detected by an microphone and the other signal produced by passing the signal of the microphone through a filter, and then a corrected anti-phase signal of a combustion noise is computed by the coefficient updating circuit, and the computed result is inputted to a gas flow control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.