Micro-water measuring method and device based on TDLAS technology

The invention provides a micro-water measuring method based on a TDLAS technology. The micro-water measuring method comprises the following steps: calculating concentration information of measured gas and calculating a network sample data residual error. The invention further provides a micro-water measuring device based on the TDLAS technology; when micro-water is detected through a TDLAS experimental platform, due to the fact that a light path is exposed in the air, water molecules in the air certainly interfere with the detection result of the experiment, and secondly, the background gas such as nitrogen also contains trace water molecules, and the detection precision can be affected by all of them. In order to avoid the phenomenon, the laser is divided into two beams with the intensities of 95% and 5% respectively, wherein the laser with the intensity of 5% is used as a reference signal to eliminate interference of moisture in air and background gas; in addition, the influence of external factors on the c