METHOD AND SYSTEM OF TEMPERATURE AND PRESSURE CONTROL BY TENSOMETER BRIDGE Russian patent published in 2019 - IPC G01K7/16 G01L1/22 G05B11/01 G05D16/20 G05D23/30 G05D27/02 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment, in particular to temperature and pressure control by tensometer bridge. In the method for controlling temperature and pressure by a tensometer bridge, which includes supplying current to the diagonal of supplying the tensometer bridge and measuring voltage on the measuring diagonal U₊, when changing direction of feed current of tensometer bridge, voltage U_-. Unlike prototype, output variables of temperature t and pressure p of controlled object in digital equivalents are supplied to controller input, control signal of which corresponds to desired properties of output variables of temperature T and pressure P of controlled object, and it is realized with normalized error ε, which serves as automatic controller, which adapts by ranges and temperature and pressure due to evaluation of actual values of input Q and output q variable temperature t and pressure p to standardized equivalents T, P of their maximum values at each moment of time and corresponding ratio of difference and sum of products of temperature T and pressure P of command input Q = RT and output q = pt of variable controlled object. In a temperature and pressure control system, a tensometer bridge comprising a controller in series connected through an actuator to a controlled object of the strain gage, the actuator is a digital-to-analogue converter and an analogue-to-digital converter connected between the output of the strain gage and the controller input, in contrast to the prototype, the controller consists of a command value generator with a temperature and pressure decoder in series connected to the multiplier and an adder, the outputs of which, through a divider, are connected to outputs of the controller, the inputs of which are the second inputs of the second multiplier, which serve for output variables of the controlled object, and the second multiplier is connected to the second inputs of the divider through the second adder.

EFFECT: technical result is reduction of control error when controlling pressure and temperature due to increased linearity of control of desired signal, which ultimately improves metrological efficiency of temperature and pressure control.

3 cl, 8 dwg