METHOD TO CALIBRATE OPTICAL MEASUREMENT EQUIPMENT IN ASSESSMENT OF AVERAGE DIAMETER OF DISPERSED PARTICLES Russian patent published in 2013 - IPC G01N15/02 G01R35/00 

FIELD: measurement equipment.

SUBSTANCE: measurements of characteristics of a disperse system are carried out with calibrated equipment and a photorecording device with subsequent determination of dependence between the signal of the calibrated equipment and the average diameter of particles identified visually, at the same time the liquid is exposed to ultrasound, thus a disperse system is created, it is illuminated with periodical pulses of light with duration of T_p≤0.1T_uo (where T_uo - period of ultrasonic oscillations), synchronised with ultrasonic oscillations, during light pulses they measure the average diameter of dispersed particles with calibrated equipment and determine it on the basis of photorecording results (d_av._e and d_av.p accordingly), the phase shift is changed between light pulses and ultrasonic oscillations, as well as ultrasound capacity, afterwards the measurements and photorecording are continued until the necessary quantity of the calibration levels is obtained, the calibration characteristic is determined as dependence of the value d_av._e on d_av.p.

EFFECT: simplified calibration due to exclusion of operations related to usage of reference powders, expansion of area of application due to calibration of instruments that realise integral methods of optics in disperse systems.

2 cl, 3 dwg