METHOD AND DEVICE FOR PORTION-BY-PORTION WEIGING OF GNAULAR MATTERS IN FLOW FOLLOWED BY PRELIMINARY MEASURING Russian patent published in 2006 - IPC G01G13/04 

FIELD: weight measuring equipment.

SUBSTANCE: method and device can be used for measuring granular matters in flow and portion-by-portion weighing of large masses of granular matters. When weighing any preliminary measured portion of matter, the matter pressure force velocity increase onto weight-receiving unit is measured pressure force velocity increase value is memorized during the value grows linearly when weighing any portion. Then matter pressure force velocity increase onto weight-receiving unit is calculated during period of its linear growth while weighing any portion in relation to memorized matter pressure force velocity increase when weighing the first portion. Preliminary measured value of matter portion is changed inversely proportional to the relation during next subsequent cycle of measurement. When weighing any portion, the moment of first zero value of matter pressure force velocity increase onto weight-receiving unit is achieved, is determined, starting from which moment the real value of weight of portion is determined as math expectation of average value of pressure onto weight-receiving unit after that portion was loaded. Device for realization of the method has preliminary weighing unit and weight measuring device, provided with force strain-gauge force converter; both units are mounted in series inside flow. Device also has indication unit, calculator, device for measuring fill-in of preliminary weighing unit, and preliminary weighing unit fill-in regulator. Outputs of pressure converter and preliminary weighing unit fill-in meter are connected to first and second input of calculator correspondingly. First output of calculator is connected with input of preliminary weighing unit fill-in regulator. Second output of calculator is connected with input of indication unit. Third and fourth outputs of calculator are connected with control inputs of preliminary weighing unit and weight-measuring device correspondingly.

EFFECT: simplified design; increased velocity of metering of granular matters.

2 cl, 2 dwg