Process for investigating particles situated in a gas
US5431714A · kind A · utility
15Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1994 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Feb 25, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the process for investigating particles situated in a gas, a gas stream is guided past a miniaturized UV excimer radiator. In this case, the particles are ionized and subsequently filtered out, and the resultant photoelectrically induced current is measured. Since particles from different sources (petrol engine, diesel engine, cigarette smoke) exhibit a wavelength dependence which is characteristic of the source, by measurements at at least two wavelengths, which is readily possible when using UV excimer radiators with different gas fillings, pollutants can be detected according to the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.