MULTI-CHANNEL ON-SITE IDENTIFICATION DEVICE FOR PRECURSOR CHEMICALS AND DETECTION METHOD THEREOF

The invention discloses a multi-channel precursor chemical on-site identification device and a detection method, relates to the technical field of infrared gas sensors, and particularly relates to a multi-channel precursor chemical on-site identification device and method for infrared integrated gas sensors for detecting three components including CO, CO2 and SO2. The multi-channel precursor chemical on-site identification device is characterized by comprising a detection gas chamber, a spectrum transmitting end and a spectrum receiving end, and the spectrum transmitting end and the spectrum receiving end are respectively arranged at the front part and the rear part of the detection gas chamber. The significance of the invention lies in that a novel integrated technology of the voltage-controlled optical filter and the pyroelectric infrared sensor is adopted, spectrum scanning in a long-wave range is realized, a long-wave infrared absorption spectrograph can be developed, and the long-wave infrared absorption spectrograph can be used as a supplementary technology or means of a currently common short-wave infrared absorption spectrograph; a technical foundation is laid for establishing a fingerprint map library of the precursor chemicals, and the purpose of completely solving the detection and analysis problems of the precursor chemicals is expected to be achieved.