GAS DETECTION DEVICE AND GAS DETECTION METHOD

摘要

In a gas detection device and a gas detection method according to the present invention, detection light that has been subjected to frequency modulation is emitted while being scanned, a light reception output signal that is obtained by receiving the reflected light of the detection light is subjected to phase-sensitive detection, the detection output signal thereof is sampled, and a gas GA to be detected is detected on the basis of the sampling result. The modulation frequency of the detection light is controlled on the basis of the scanning speed.