Patent ID: 11965735
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A thickness measurement method of measuring a thickness of a measurement object, comprising:
performing a heating operation by a heating device such that a surface of the measurement object is locally heated in a dot shape having a heated position as a center of the dot shape;
generating thermal images corresponding to a temperature of the surface of the measurement object by capturing an image of the heated surface of the measurement object at a predetermined time interval by an imaging device, the image comprising multiple positions, each having a distance r from the heated position on the surface;
acquiring temperature data indicating temporal changes in temperature at the multiple positions on the surface of the measurement object based on the thermal images generated by the imaging device;
fitting a solution function to the temperature data for each of the multiple positions, the solution function indicating a solution of a heat conduction equation corresponding to a point heat source and including a parameter, which is a constant in the solution function and related to the thickness of the measurement object; and
calculating the thickness of the measurement object based on a value of the parameter included in the fitted solution function obtained by the fitting.