Stepped-Type Photoacoustic Resonator for Simultaneous Dual-Gas Detection
Dalian University of Technology · Electric Power Research Institute · +1 more institution
Abstract
A stepped-type resonator-based photoacoustic (PA) sensor is proposed for simultaneous dual-gas detection. The sensor employs a dual-resonance architecture, with a stepped resonant tube capable of acoustic amplification at two different frequencies. An optimized design of the PA resonator response is conducted using finite element analysis. When the amplitudes of the two resonance peaks are high and the relative signal strength is also high, the simulated values of the two resonance frequencies are 2370 and 4220 Hz, respectively. A dual-channel synchronous digital lock-in amplifier is employed to achieve simultaneous detection in the two channels. Two lasers for methane and acetylene detection are modulated…
Citation impact
- FWCI
- 44.93
- Percentile
- 100%
- References
- 60
Authors
7Topics & keywords
- Resonator
- Photoacoustic imaging in biomedicine
- Amplifier
- Laser
- Resonance (particle physics)
- Photoacoustic spectroscopy
- Time delay and integration
- Detection limit
- Affordable and clean energy