METHOD FOR MEASURING THE TEMPERATURE OF THE MEDIUM Russian patent published in 2022 - IPC G01K7/16 

FIELD: thermometry.

SUBSTANCE: invention relates to the field of thermometry and can be used to measure the temperature of a medium or objects. The method for temperature measurement consists in powering a resistance thermometer connected by a two-wire line, shunted by a capacitor directly on its connecting contacts, with voltage pulses through a reference resistor with a duty cycle at which the average current through the resistance thermometer does not exceed the permissible value. In this case, the voltage at the input of the two-wire line is integrated from the moment the voltage pulse is completed and the integral value is measured at time t₁ and at the end of the transient discharge of the shunt capacitor. The resistance of the resistance thermometer is calculated from the measured voltage values, the duration of the t₁ interval and the voltage drop on the reference resistor measured in a steady state at the end of the voltage pulse, and the temperature value is determined by the calibration characteristic of the resistance thermometer.

EFFECT: reduction in the temperature measurement error caused by the resistance of a two-wire line, interference and noise of quantization of analog-to-digital conversion during digital integration of the voltage at the input of a two-wire line.

1 cl, 1 dwg