Yuechong SHI, Yafei LI, Fang SONG, Chuantao ZHENG, Yiding WANG. Hardware Reconfigurable Near Infrared Wavelength Modulated Methane Sensor and Its Application（Invited）[J]. Acta Photonica Sinica, 2023, 52(10): 1052407
- Acta Photonica Sinica
- Vol. 52, Issue 10, 1052407 (2023)
Fig. 1. HITRAN-based CH4 absorption line and the curve of laser current versus emission wavelength number at 36 ℃
Fig. 2. Structure block diagram of hardware reconfigurable wavelength modulated CH4 sensor，and a photo of the electrical part based on FPGA
Fig. 3. FPGA internal logic structure diagram of the sensor
Fig. 4. Test waveform under continuous and intermittent working modes
Fig. 5. According to Modelsim software，simulated gas absorption waveform，laser driving signal waveforms and second harmonic waveform
Fig. 6. Sine signal verification experiment and result analysis
Fig. 7. Stability analysis of sine signal amplitude acquisition
Fig. 8. CH4 detection experiment and result analysis
Fig. 9. Dynamic response time test of the sensor
Fig. 10. Stability analysis of the sensor system
Fig. 11. Field detection results of CH4 leakage test
|
Table 1. System reconfigurable functions and parameters
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20