METHOD FOR PRELIMINARY CALIBRATION OF CAPACITIVE SENSOR OF MEDIUM INTERFACE LEVEL Russian patent published in 2023 - IPC G01F23/26 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment, and it is intended for measurement of medium interface levels in different industries. A method for preliminary calibration of a capacitive sensor of a medium interface level consists in implementation of stages, at which, during the assembly of the mentioned sensor: capacities of the main measuring channel, which, within preliminary calibration, is only one of metal rods connected to a computing unit of the capacitive sensor, are measured; capacities of each compensation measuring channel are measured; by means of a microcontroller of the mentioned computing unit, differences between each value of capacity of compensation and main measuring channels are calculated. Next, operations are repeated during a time interval to obtain a set of primary correction factors. By means of the microcontroller, an averaged value of a correction factor is calculated based on the set of primary correction factors, memorizing the resulting value in non-volatile memory of the computing unit.

EFFECT: increase in the reliability and manufacturability of a structure and, consequently, increase in the accuracy of measurements of a medium interface level.

14 cl, 32 dwg