Gas short-range laser remote sensing signal rapid processing circuit

The utility model relates to a gas short-range laser remote sensing signal rapid processing circuit, which comprises a laser device, a laser device driving module, a photoelectric detection module, an A/D (Analog to Digital) sampling converting circuit and a rapid digital signal processing circuit, wherein sine carrier wave and slope scanning signals are combined by a digital signal combining unit in the circuit into signals with the same cycle and phase to repeatedly drive the laser device. An A/D sampling converting module receives a sine triggering signal in the combined signals when being used for analog-digital conversion, the two signals have the same phase, the digital signal processing circuit completes the multiplying, integration, phase correction and low-pass filtering of digital signals, and characteristic signals for characterizing gas are output; and the phase correction and the low-pass filtering only need one path of signal. Through the combination of digital signal combined driving, synchrono