Photoacoustic detector with long term drift compensation
US8939006B2 · kind B2 · utility
6Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2011 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Dec 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/1702
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photoacoustic detector wherein control circuits compensate for long term variations of components therein including a light source and sensing microphones. The control circuits intermittently energize the source to evaluate changes in at least source resistance. The control circuits intermittently energize an acoustic generator to evaluate changes in one or more generator responsive microphones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.