INDUSTRIAL METAL DETECTOR FOR DETERMINATION OF PERCENTAGE CONTENT OF FERROMAGNETIC IN ORE Russian patent published in 2014 - IPC G01N27/83 

FIELD: measurement equipment.

SUBSTANCE: invention relates to ore dressing industry and is used to determine percentage content of ferromagnetic in ore. The device comprises excitation coils, an AC generator, which develops AC excitation magnetic field, a receiving coil, arranged in parallel to the transmitting ones in the middle, a summator, a DAC signal of compensation of x.x. receiving coil, an ADC, a speed sensor, an additional receiving coil, connected in parallel with the transmitting ones, weights, a unit of a central processor, a calibration loop, arranged in parallel to the receiving coil, at the same time high evenness of measurement of the response value is achieved due to usage of several transmitting coils for creation of the even field, a processing logic with account of a signal of an additional coil, arranged in parallel to the transmitting one, generation of a signal of compensation x.x. with account of re-distribution of harmonics of the main frequency and compensation of the signal x.x. with account of the varying environment (climatic, mechanical changes) dynamically, i.e. without drop of sensitivity in the mode of real time.

EFFECT: increased evenness of measurement of a value of magnetising field response.

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