METHOD FOR DETERMINING GRANULOMETRIC COMPOSITION OF AIR FOR TUBELESS DUST SENSOR AND MOBILE DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC G01N15/02 

FIELD: measuring equipment.

SUBSTANCE: invention relates to a method for determining the granulometric composition of air for a tubeless dust sensor and an electronic computing device for its implementation. The method for determining the granulometric composition of air for the tubeless dust sensor contains stages, in which: a laser beam is focused at a point in space to set the sensing volume in the area near a focus point of the laser beam, wherein the size of the sensing volume is variable depending on the size of particles to be detected; a threshold value is set for particle signals, wherein particle signals are received laser radiation scattered on particles flying through the sensing volume, while the threshold value is at least one of at least a shape of a signal envelope and the maximum amplitude of the signal; particle signals are detected from particles flying through the sensing volume; values of signal parameters are extracted from each detected particle signal, wherein signal parameters are at least one of the signal amplitude, the signal oscillation frequency, the number of oscillations in the signal, the time of flight of the particle through the sensing volume, the shape of the signal envelope; a statistical distribution of extracted values of at least one signal parameter selected from the signal amplitude, the number of oscillations in the signal and the shape of the signal envelope or a combination of all signal parameters is built; the particle size distribution is built using built statistical distribution and a trained particle size distribution model.

EFFECT: improvement in the quality of determination of the granulometric composition of air.

14 cl, 7 dwg