METHOD AND DEVICE FOR AUTONOMOUS REMOTE DETERMINATION OF CONCENTRATION OF ATMOSPHERIC GAS COMPONENTS Russian patent published in 2020 - IPC G01N21/61 

FIELD: gas analysis.

SUBSTANCE: invention relates to gas analysis and concerns an apparatus for independent remote determination of concentration of atmospheric gas components. Device includes an optical unit containing a diode laser, which provides a probing beam and a signal amplitude modulating system, a receiving system of an analytical channel, a reference cell and a control unit for receiving and processing data. Data control, reception and processing unit detects probing radiation passed through analyzed gas, extracts signal at first higher harmonic component of modulation frequency f and on secondary component 2f and calculates the probing beam absorption degree by the measured gas relative to the first harmonic component to the second harmonic component. Stabilization of the diode laser is carried out from the position of the peak of the absorption line of the measured gas on the component at frequency 3f with accuracy of 10^-4 cm^-1. Distance is calculated from phase shift to laser radiation scattering surface.

EFFECT: technical result consists in increase of sensitivity, reduction of weight and size characteristics and provision of possibility of gas analyzer installation on unmanned aerial vehicles.

5 cl, 6 dwg