DETERMINATION OF DUST PARTICLE CONCENTRATION ND MEAN SIZE Russian patent published in 2014 - IPC G01N21/94 G01N15/02 

FIELD: instrumentation.

SUBSTANCE: proposed method comprises conversion of pulse voltage into light flux for analysed medium area to be probed therewith. Measuring channel containing analysed medium and extra channel filled with gas mix cleaned of gas mix are used. Said light flux is splitted in said channels to wide and narrow fluxes to be converted into electric signals while signal proportional to reference channel narrow light flux is subtracted from measuring channel narrow light flux. Obtained signal is synchronously detected and processed by microcontroller. Besides, signal proportional to reference channel wide light flux is subtracted from signal proportional to measuring channel wide flux. Obtained signal is synchronously detected and processed by microcontroller to define total concentration of dust and dust particle size.

EFFECT: higher precision of measurement.

2 dwg