DEVICE FOR BUILDING OUTPUT SIGNAL OF INDUCTIVE DIFFERENTIAL MEASUREMENT TRANSDUCER Russian patent published in 2002 - IPC

FIELD: measurement technology. SUBSTANCE: device has at least two branches, two identical rectifiers and the first differential amplifier the main inputs of which are connected to rectifiers outputs, and variable resistor connected to output of one of two rectifiers. Variable resistor slider is connected to the first additional input of differential amplifier. The device has adder of alternating and constant voltage, two identical high frequencies filters and the second differential amplifier. The first differential amplifier has the second additional input, direct current power supply source which output is connected to the first adder input and the second input of which is connected to alternating current power supply source output and its output is connected to inductive differential primary transducer the first output of which is connected to inputs of the first low frequency filter and the first high frequency filter and the second one is connected to inputs of the second high frequency filter identical to the first high frequency filter and the second low frequency filter. Outputs of the first and the second high frequency filters are connected to inputs of the first and the second rectifiers, respectively. Outputs of the first and the second low frequency filters are connected to the second differential amplifier inputs which output is connected to the second additional input of the first differential amplifier. EFFECT: high accuracy of measurements. 1 dwg