Microwave sensing for determination of loading of filters
US7679374B2 · kind B2 · utility
23Cited by
13References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 30, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | May 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Method for determining loading of a filter. The filter has a first dielectric constant. The filter becomes loaded with contaminant material that has a second dielectric constant. The filter, such as a diesel particulate filter, is contained within a metallic enclosure forming a microwave cavity. The method includes establishing microwave energy in the cavity and monitoring changes in the cavity microwave response, the changes being related to filter loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.