CPC A61B 5/01 (2013.01) [A61B 2562/0271 (2013.01)] | 10 Claims |
1. An in-vivo temperature measurement device comprising:
a plurality of thermal resistors;
a plurality of first temperature sensors at a first end of the plurality of thermal resistors configured to face a living body;
a plurality of second temperature sensors provided at a second end of the plurality of thermal resistors opposite to the first end;
a memory configured to store an estimation model of a core temperature of the living body according to a non-thermal equilibrium state of the living body and thermal resistance values of the plurality of thermal resistors; and
an arithmetic circuit configured to estimate the core temperature of the living body based on the estimation model, the thermal resistance values, and a plurality of temperatures measured by the plurality of first temperature sensors and the plurality of second temperature sensors;
wherein the first temperature sensors are configured to measure a first temperature indicating an epidermis temperature of the living body;
wherein the second temperature sensors are configured to measure a second temperature at a position away from the living body;
wherein the thermal resistance values of the plurality of thermal resistors are different from one another; and
wherein the estimation model is represented by a following expression:
wherein Tc indicates the core temperature at a measurement time t, RSi (i=1, 2, 3) indicates a corresponding thermal resistance value of each of the plurality of thermal resistors, TSi (i=1, 2, 3) indicates a corresponding first temperature measured by each of the plurality of first temperature sensors, Ti, =(TSi(t)-TUi(t)), TUi (i=1, 2, 3) indicates a corresponding second temperature measured by each of the plurality of second temperature sensors, and TSi′=dTSi(t)/dt.
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