Particulate matter detection device and particulate matter detection method
US7862649B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2009 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Aug 14, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particulate matter detection device includes a collection electrode that collects the particulate matter, a discharge electrode that allows a corona discharge to occur when a voltage is applied between the collection electrode and the discharge electrode, a measurement electrode, the impedance between the collection electrode and the measurement electrode changing when the collection electrode has collected the particulate matter, and a measurement section that detects a change in the impedance between the collection electrode and the measurement electrode, the particulate matter detection device detecting the particulate matter by charging the particulate matter contained in the gas by utilizing the corona discharge, collecting the charged particulate matter by the collection electrode by utilizing an electrostatic force, and detecting a change in the impedance between the collection electrode that has collected the particulate matter and the measurement electrode using the measurement section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.