METHOD OF TEMPERATURE SENSOR THERMAL TIME CONSTANT MEASURING Russian patent published in 2018 - IPC G01K15/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of thermal measurements, in particular to the temperature sensors constant thermal inertia (thermal time constant) index measurement. Proposed is a method of the temperature sensor thermal time constant measuring, consisting in placing the latter in a medium with the constant heat transfer coefficient, recording and graphical plotting of the time-varying temperature sensor cooling temperature. According to the plotted graph, the changes in the temperature sensor registered temperature in time determining the temperature sensor initial temperature T₀ = T₀(t₀) for the arbitrarily selected reference time t₀ within the recording interval. Calculating the temperature sensor expected temperature T (t_Oh) for the moment of time t_Exp=t₀+τ according to the formula and then performing transitions from the T₀ value to the T(t_Exp) value and further from the T(t_Exp) value to the t_Exp value, at which the T(t_Exp) value is recorded. Calculating the thermal time constant value according to the formula: τ = t_Exp-t₀. Thus, any known device can be used to plot the temperature sensor recorded temperature in time, used for the temperature sensors verification or calibration and able to detect the temperature sensor temperature change in time.

EFFECT: technical result is simplification of the temperature sensor thermal inertia index determining process and ensuring high accuracy of the obtained result.

1 cl, 1 dwg