METHOD FOR AUTOMATIC CONTROL OF PARTICLE SIZE IN STREAM OF MATERIAL Russian patent published in 2010 - IPC G01N15/02 

FIELD: physics.

SUBSTANCE: method for automatic control of particle size in a stream of material involves periodical probing of particles of the material with a micrometric probe with conversion of the measured particles during their period of fixation with a probing mechanism into an electrical signal of an inductive transducer. A given threshold value U_n of the signal of the inductive transducer for measuring the particles is then set. Further, the average value of n-minimum values of the electrical signal of the inductive transducer is calculated in a range of values lower than the given threshold in each measurement cycle. The value of the control size of the pulp (medium) is defined as a value which is functionally dependent on the average value of n-minimum values of the electrical signal of the converter in each measurement cycle. In the method for automatic control of particle size, the value of the given threshold signal (U_n) and the number of averaged minimum values are selected based on the condition: U_m>U_n≥U_m ⁿ n≥3, where U_m ⁿ is the value of signal corresponding to the maximum possible particle size; U_m is the maximum possible value of the signal of the transducer in a measurement cycle.

EFFECT: more accurate measurement of particle size only during its fixation.

2 cl, 3 dwg