Patent ID: 7069169

Claim:
A method for measuring the heat flux on an object surface, wherein the emission intensity of a temperature-sensitive paint that varies with the temperature of the object surface is chronologically captured and sensed as video information at a high frame rate, and the heat flux in each domain is calculated using the following formula on the basis of temperature history in each of the separate domains on the object surface in a state in which excitation light is incident on the object surface that comprises an arbitrary material and is coated with a temperature-sensitive paint: q . ⁡ ( t ) = 2 ⁢ ρ ⁢ ⁢ c ⁢ ⁢ k π ⁢ ∑ i = 1 m ⁢ ⁢ T ⁢ ( i ) - T ⁡ ( i - 1 ) ( t m - t i ) 1 / 2 + ( t m - t i - 1 ) 1 / 2 ⁢ .