US 11,940,333 B2
Living body internal temperature measuring device and living body internal temperature measuring method
Michiko Seyama, Tokyo (JP); Daichi Matsunaga, Tokyo (JP); and Yujiro Tanaka, Tokyo (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Appl. No. 17/058,555
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed May 14, 2019, PCT No. PCT/JP2019/019125
§ 371(c)(1), (2) Date Nov. 24, 2020,
PCT Pub. No. WO2019/230370, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 2018-101586 (JP), filed on May 28, 2018.
Prior Publication US 2021/0123819 A1, Apr. 29, 2021
Int. Cl. G01K 13/20 (2021.01); A61B 5/01 (2006.01); A61B 5/026 (2006.01); A61B 8/06 (2006.01); G01K 7/42 (2006.01); G01K 17/20 (2006.01); G01J 5/00 (2022.01)
CPC G01K 13/20 (2021.01) [A61B 5/01 (2013.01); A61B 5/026 (2013.01); G01K 7/42 (2013.01); G01K 17/20 (2013.01); A61B 5/0261 (2013.01); A61B 8/06 (2013.01); G01J 5/0025 (2013.01); G01K 7/427 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An internal body temperature measurement device comprising:
a temperature sensor configured to measure an epidermis temperature of a living body;
a heat flux sensor configured to measure a magnitude of a heat flux discharged from a body surface of the living body;
a blood flow sensor configured to measure a blood flow rate in a vicinity of the heat flux sensor;
a non-transitory memory which stores a relation between a plurality of different blood flow rates of the living body and a parameter, the parameter defining a respective delay time until a fluctuation of a core temperature of the living body is reflected on the epidermis temperature of the living body for each of the plurality of different blood flow rates; and
an arithmetic circuit configured to:
calculate the core temperature of the living body from the epidermis temperature and the magnitude of the heat flux;
calculate a delay time corresponding to the epidermis temperature measured by the temperature sensor by correlating the blood flow rate measured by the blood flow sensor in the vicinity of the heat flux sensor and the relation between the plurality of different blood flow rates and the parameter stored in non-transitory memory; and
correct a time corresponding to the core temperature of the living body based on the delay time, wherein correcting the time corresponding to the core temperature of the living body based on the delay time comprises correcting the time corresponding to the core temperature of the living body based on the delay time that is less than a predetermined threshold.