CALIBRATION OF SEMICONDUCTOR GAS SENSORS AND DEVICE TO THIS END Russian patent published in 2014 - IPC G01N27/12 

FIELD: instrumentation.

SUBSTANCE: invention relates to analysis of gases. Proposed method is implemented with the help of hardware-software measuring complex. It consists in that sensor sensitive element is heated cyclically in clean air preset (PGC-1) number of time (K times) to temperature T1 and cooled to temperature T2. Then, during the next K cycles of heating and cooling test gas mix PGC-2 is fed to sensitive element area. Then, during the next K cycles of heating and cooling test gas mix PGC-3 is fed to sensitive element area. Then, during the next K cycles of heating and cooling test gas mix PGC-N is fed to sensitive element area. Family is constructed from N=4 time dependencies of conductivity of gas-sensitive ply σ(t) for every gas mix and for fixed time moment in the cycle ti to define calibration characteristic. Calibration curve thus constructed is approximated and loaded in the processor of intelligent gas module sensor. Said processor is mounted in gas analyser for sensor processor is polled by central processor of gas analyser to output readings of measured gas concentration at its display.

EFFECT: higher accuracy and validity of calibration.

5 cl, 14 dwg