METHOD FOR DETERMINING PARAMETERS OF DROPS IN NON-STATIONARY AEROSOL FLOW Russian patent published in 2024 - IPC G01N15/02 

FIELD: non-contact optical measurements.

SUBSTANCE: invention relates to non-contact optical measurements of the speed, size and concentration of liquid droplets in non-stationary aerosol flows. The method for determining the parameters of droplets in non-stationary aerosol flows is that the aerosol flow is directed to the focal plane of the microscope lens, illuminated by laser radiation. The illuminated drops are recorded by the microscope video system in the form of images of individual tracks, where the width of the track is determined by the size of the moving droplet. Radiation from a low-power diode laser, operating in a pulse-periodic mode, is passed through a cylindrical lens, which forms a narrow slit-shaped beam of light. The aerosol flow of droplets is directed into the focusing area of a video microscope located at a certain angle to the radiation of a low-power diode laser. Images of the focal points of aerosol droplets are recorded by a digital video microscope, and each drop that falls into the detection area of the video microscope is detected in the frames in the form of an intermittent track of points that correspond to individual laser radiation pulses and the brightness of which is determined by the size of the moving drop. All frames with images of the tracks are transferred to a computer, where the parameters of intermittent tracks are processed, the brightness of the points, the intervals between points for different tracks and the number of recorded tracks in a unit of volume per unit of time are determined, the droplet speeds are calculated, the corresponding histograms are built and the distribution by size and speed, and droplet concentration are determined.

EFFECT: ability to simultaneously determine the size of droplets, their speeds and concentration in the aerosol flow.

1 cl, 5 dwg