Photoacoustic detector with acoustic and vibration noise compensation
US8746038B2 · kind B2 · utility
3Cited by
9References
16Claims
0Family size
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Key dates
| Filing date | Apr 1, 2011 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | May 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/1702
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photoacoustic detector includes a sensing region for receiving atmospheric samples. One microphone receives acoustic samples from the sensing region. Another microphone receives acoustic samples from a displaced region. Microphone outputs can be subtracted to eliminate common noise and to generate an indicium of gas present in the sensing region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.