Photoacoustic spectrometry gas sensing system of active air chamber based on semiconductor laser

The invention discloses a photoacoustic spectrometry gas sensing system of an active air chamber based on a semiconductor laser. The photoacoustic spectrometry gas sensing system comprises an integrated semiconductor laser, a photoacoustic pool, a microphone, a photoelectric detection module, a signal processing module, a semiconductor laser control module, and a data output module, the integratedsemiconductor laser is directly integrated with one end of the photoelectric pool, the microphone is arranged on a side wall of the photoelectric pool, and a photosensitive surface of the photoelectric detection module aligns at a light extraction port of the photoelectric pool; the photoelectric detection module and an output terminal of the microphone are connected with an input terminal of thesignal processing module, the output terminal of the signal processing module is connected with the semiconductor laser control module, and the other output terminal is connected with the data outputmodule; and the semiconduc