DEVICE AND METHOD OF REGISTRATION OF CONDUCTING PARTICLES IN LIQUID Russian patent published in 2015 - IPC G01N27/90 

FIELD: electricity.

SUBSTANCE: invention relates to the device for registration of conducting particles (20) in a liquid (16) flowing in a pipe (10) with a speed (v), and the transmission coils (18) subject liquid to effects of periodic variation electromagnetic fields for induction in particles of vortex currents, the trapping coils (15) register the periodic electric signal corresponding to vortex currents and containing the carrier oscillation. When particles are appeared in the effective width of the zone of sensitivity of the trapping coils, the presence of a particle induces the formation of amplitude and/or phase of a signal, the cascade of analogue-digital converters converts a signal of the trapping coil into a digital form, the signal processing unit (17, 19, 35, 37, 52, 60, 68, 74, 76, 78, 80, 88, 90, 94) creates a useful signal from the signal of the trapping coil converted into a digital form, and the data processing unit (50, 60, 64) processes a useful signal to register passing in the pipe of conducting particles. According to the invention by means of the signal processing unit by monitoring of the shape of curve of the signal of the trapping coil converted into a digital form the overmodulation of cascade of analogue-digital converters by the trapping coil signal is determined, and then by mathematical approximation of the trapping coil signal converted to a digital form a signal part cut off by the cascade of analogue-digital converters is reduced.

EFFECT: expanded range of measurements, higher localization of errors.

11 cl, 5 dwg