Gas flow rate survey meter based on tunable diode laser absorption spectroscopy technology
A technology of laser absorption spectroscopy and gas flow rate, which is applied in fluid velocity measurement, absorption/scintillation/reflection spectroscopy, velocity/acceleration/shock measurement, etc., to achieve high measurement accuracy, reduced system maintenance, and large measurement range.
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[0032] see figure 1 , 2, a gas flow rate measuring instrument based on tunable semiconductor laser absorption spectroscopy technology, including a red light source 5, a laser 13, a signal generator 14, a laser emitting device 9, a laser receiving device 10, a data acquisition card 19, and an optical fiber interferometer 15. The detector 17 and the data processing and display module 20, the area between the laser emitting device 9 and the laser receiving device 10 has the gas flow to be measured, and the subsequent optical path of the laser 13 is provided with a fiber combiner 6 and 1×4 optical fiber in sequence The beam splitter 7, the indicator light emitted by the red light source 5 and the laser beam emitted by the laser 13 are combined by the optical fiber beam combiner 6, and then divided into four beams by the 1×4 optical fiber beam splitter 7, one of which is sequentially passed through The fiber optic interferometer 15 and the data acquisition card 19 are input to the...
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