Noise robust time of flight estimation for acoustic pyrometry
US9702768B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2013 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Nov 5, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K13/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An acoustic signal traversing a hot gas is sampled at a source and a receiver and is represented in overlapping windows that maximize useable signal content. Samples in each window are processed to represented in different sparsified bins in the frequency domain. Determining a signal delay between the source and the receiver from a summation of maximum smoothed coherence transform cross-correlation values of different data windows wherein a sparseness of a mean smoothed coherence transform cross-correlation of windows is maximized. Determining a set of delay times wherein outliers are deleted to estimate a time of flight from which a temperature of the hot gas is calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.