New nodal real time gas concentration monitoring method and sensor
A gas concentration, real-time monitoring technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of interference, short life, poor stability, etc., to overcome the slow response speed, reduce system costs, and real-time online monitoring.
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[0015] See Figure 1 and Figure 2.
[0016] Labels in the figure: 1. Main box, 2. Downhole part, 3. Main power switch, 4. Semiconductor laser temperature and current control module, 5. Signal generation circuit, 6. Near-infrared DFB semiconductor laser, 7. 1×N(N1 ~64 optional, determined by the laser power and the number of points required to be measured) single-mode fiber coupler, 8, output fiber connector, 9, input fiber connector, 10, main power socket, 11, fan, 12, DC stabilizer Piezoelectric source, 13, input 1×N optical switch, 14, input 1×N optical switch drive circuit, 15, self-focusing lens collimator, 16, calibration absorption pool, 17, focusing lens, 18, infrared photodetector, 19. Lock-in amplifier, 20. Data acquisition, processing and control module, 21. Liquid crystal display. The components involved in the above are all installed on the chassis 1 . 22. Output single-mode fiber, 23. Gas absorption cell, 24. Input single-mode fiber, 25. V-groove, 26. Output self...
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