Apparatus and method of photoacoustic sensor signal acquisition
US8689607B2 · kind B2 · utility
5Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Feb 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02809
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photoacoustic detector includes first and second microphones carried by an acoustic sensing chamber. Signals from the microphones are processed using lock-in detection to increase the signal-to-noise ratio. An acoustic pressure generator can be incorporated to calibrate the microphones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.