HIGH-FREQUENCY LEVEL MEASURING INSTRUMENT Russian patent published in 2009 - IPC G01F23/28 

FIELD: physics, measurements.

SUBSTANCE: invention relates to contactless measurements of level of various physical media and can be used in automated control systems of technological processes. The high-frequency level measuring instrument contains the self-oscillator of harmonic oscillations incorporating a parallel inductance-capacitance oscillatory circuit with its sensitive element representing a transmitting aerial, a phase indicator measuring shift of phases between current and voltage at the device input, an amplifier acting as a buffer in the circuit "self-oscillator - sensitive element" and preventing frequency shift and failure of self-oscillations, and a resistance indicator located and connected in parallel with the said phase indicator. Note also that the proposed level measuring instrument comprises a computer to define a computing impedance of the aerial with due allowance for data signals from the phase indicator of a phase and the resistance indicator. The resulted readings of the latter allow a contactless continuous current level measurement.

EFFECT: contactless continuous measurement of current level.

1 dwg