FIELD: measurement equipment.
SUBSTANCE: fibre mass of specified weight is combed out, shaped into a package of specified size, configuration, and placed into a drying chamber, the set time is maintained at the specified temperature, weighed, scanned with acoustic oscillations, placed between linings of an air condenser, and condenser impedance is identified at the specified frequency, the amplitude of the acoustic signal is fixed, again placed into the drying chamber. Weighing is repeated, as well as identification of condenser impedance and measurement of amplitude of acoustic oscillations. The operation is repeated to achieve stable weight of the fibre mass sample. The procedure is repeated for samples of different weight, and accordingly number of fibres in the scanning direction. Functional dependences are built for dependence of amplitude of acoustic oscillations on number of fibres in scanning direction and moisture of fibres on condenser impedance, the investigated fibre is placed between sensors of acoustic oscillations and linings of the air condenser, by dependence of amplitude of acoustic oscillations on number of fibres in the scanning direction they identify actual weight of the sample, and the moisture of fibre mass is found as the ratio of difference of sample weight before drying and after weighing to the sample weight after drying in percentage multiplied by the ratio of actual weight to the specified one.
EFFECT: increased accuracy, objectivity and efficiency of fibre moisture control in mass.
1 dwg
