US 12,385,870 B2
Joint portion evaluating method and joint portion evaluating device
Mikio Muraoka, Akita (JP); Nobuyuki Kamihara, Tokyo (JP); Kiyoka Takagi, Tokyo (JP); Sota Kamo, Tokyo (JP); Naomoto Ishikawa, Tokyo (JP); Hideki Horizono, Tokyo (JP); and Toshiyuki Takayanagi, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and AKITA UNIVERSITY, Akita (JP)
Appl. No. 18/275,906
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP); and Akita University, Akita (JP)
PCT Filed Feb. 9, 2022, PCT No. PCT/JP2022/005150
§ 371(c)(1), (2) Date Aug. 4, 2023,
PCT Pub. No. WO2022/172961, PCT Pub. Date Aug. 18, 2022.
Claims priority of application No. 2021-020761 (JP), filed on Feb. 12, 2021.
Prior Publication US 2024/0118234 A1, Apr. 11, 2024
Int. Cl. G01N 27/24 (2006.01)
CPC G01N 27/24 (2013.01) 15 Claims
OG exemplary drawing
 
1. A joint portion evaluating method for measuring and evaluating a joint state of a joint portion at which a first joint body and a second joint body are joined together, the joint portion evaluating method comprising:
acquiring as a reference value a capacitance value of the joint portion in a reference measurement state serving as a reference for measurement conditions;
changing a measurement state from the reference measurement state, and acquiring as a measured value a capacitance value of the joint portion in a changed measurement state arising after the changing of the measurement state;
deriving as a measurement evaluation value a value obtained by referencing the measured value with the reference value; and
performing an evaluation based on the measurement evaluation value derived,
wherein the reference measurement state includes a reference temperature serving as a reference at the joint portion, and
wherein the acquiring of the measured value includes changing a temperature of the joint portion from the reference temperature, and acquiring as the measured value a capacitance value of the joint portion at a changed temperature serving as the changed measurement state arising after the change of the temperature.