DEVICE TO MEASURE LEVEL OF DIELECTRIC SUBSTANCE Russian patent published in 2013 - IPC G01F23/26 

FIELD: measurement equipment.

SUBSTANCE: device for measurement of a dielectric substance level comprises a standard, the first output of which is connected to the first input of a switching unit, and the second output is connected to the output of a generator of sine voltage and to the first measurement input of the device. Metering inputs of the device from the second to (n+1), where n - quantity of dipoles, are connected to inputs of the switching unit, the outlet of which via serially connected current-voltage converter, a scale amplifier and an analogue-to-digital converter is connected to the input of the measurement control block, outputs of which are connected to the switching unit, the scale amplifier and the analogue-to-digital converter, and also to the control block by frequency and to a calculator of electric capacitance and a calculator of active resistance. The measurement control block is connected to a mode control block, outputs of which are connected to inputs of the control block by frequency, a calculator of full increment of electric capacitance, a calculator of level, a calculator of current increment of electric capacitance and a block of switching control, the outlet of which is connected to the switching unit. The electric capacitance calculator is connected to the calculator of current increment of electric capacitance and to the calculator of full increment of electric capacitance, which is connected to the level calculator. The analogue-to-digital converter is connected to the electric capacitance calculator and the active resistance calculator, which are connected to the control block by frequency, the outlet of which is connected to the generator of sine voltage. The calculator of current increment of electric capacitance is connected to the level calculator, at the same time the output of the switching control unit is the device output. At the same time the device comprises the second unit of substitution circuit unit, besides, outputs of the first and second blocks of substitution circuit setting are connected to the first switch, the control input of which is connected to the control input of the second switch and to the mode control block. At the same time the output of the first switch is connected to the calculator of electric capacitance and active resistance calculator, which is connected to the second switch, the output of which is connected to the threshold element, which is connected to the measurement control block, and the output of the threshold element is an output of the device and is connected to the control input of the third switch, which is connected to the level calculator, at the same time the outlet of the second switch and the outlet of the third switch are the device outputs.

EFFECT: higher reliability of measurement.

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