Electronic device and method of estimating core body temperature using the same

An electronic device comprising:

• a first temperature sensor configured to measure a first temperature of a skin surface of a user when the user comes into contact with a main body of the electronic device;
• a second temperature sensor configured to measure a second temperature inside the main body;
• a first heating element disposed between the first temperature sensor and the second temperature sensor, and disposed closer to the first temperature sensor than to the second temperature sensor;
• a second heating element disposed between the first heating element and the second temperature sensor, and disposed closer to the second temperature sensor than to the first temperature sensor;
• an insulator disposed between the first heating element and the second heating element;
• and
• a processor configured to:
• estimate heat flux based on the first temperature and the second temperature by operating the second heating element;
• estimate a blood perfusion rate of the user based on a temperature of the first heating element and the first temperature, and
• estimate a core body temperature of the user based on the first temperature, the estimated heat flux, and the estimated blood perfusion rate,
• wherein the first heating element and the second heating element comprise at least one of a heater, a battery, or a light emitting element (LED),
• wherein by operating the second heating element, the processor is further configured to estimate, as the heat flux, power of the second heating element at a time when the first temperature and the second temperature become equal to each other.