FIELD: measurement technology.
SUBSTANCE: temperature-dependent compensation resistor is installed in series with working resistance strain gauge in specified arm of bridge circuit and nominal value of temperature-dependent compensation resistor is calculated followed by subsequent balancing of initial level of output signal. Bridge circuit is preliminary balanced with precision of +-5% nominal output signal of detector. Resistance temperature factors of all the arms of the bridge circuit are determined taking introduction of balancing resistor and preliminary balancing performed into account. Initial level of output signal of detector is determined at normal temperature and temperature of exploitation. Arm of the bridge circuit is selected where temperature-dependent compensation resistor is switched on. The arm of bridge circuit is selected from the sign of change in of non-compensated but balanced detector's initial level of output signal. If initial level of output signal is positive at positive change in temperature the mentioned resistor is switched into one of the arms together with resistance strain gauges receiving compression deformation. If change in level is negative, the resistor is switched into the arm together with resistance strain gauges accepting elongation deformation. Value of temperature-dependent compensation resistance is calculated after its is put into specific arm of bridge circuit. Bridge circuit is balanced without making changes in temperature resistance coefficients of balanced arm.
EFFECT: improved technological effectiveness; improved precision.
