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

Claim 7:
8. A thickness measurement device configured to measure a thickness of a measurement object, comprising:
an input interface configured to receive thermal images, each generated by capturing an image of a heated surface of the measurement object at a predetermined time interval, each of the thermal images being obtained by 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 heating position as a center of the dot shape, and comprising multiple positions, each having a distance r from the heated position on the surface; and
a processor configured to perform a calculation for obtaining a thickness of the measurement object based on the thermal images, wherein
the processor is configured to:
acquire temperature data indicating temporal changes in temperature at multiple positions on the surface of the measurement object based on the thermal images;
fit 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

calculate the thickness of the measurement object based on a value of the parameter included in the fitted solution function obtained by the fitting.