Component temperature measuring method

Abstract

A method of measuring temperature of a component capable of emitting thermal radiation and reflecting background radiation having the steps of: providing a pyrometer for measuring the radiation from the component, characterised by coating a part of the component with a first emissivity coating and a part of the component with a different and second emissivity coating, each with known emissivities EH and EL respectively, recording a first radiation measurement from the first emissivity coating RH and a second radiation measurement from the second emissivity coating RL, then calculating the true radiation RBlade from the component from the equation R Blade = ( R H E H - R L E H ⁢ ( 1 - E H 1 - E L ) ) ( 1 - E L E H ⁢ ( 1 - E H 1 - E L ) ) and relate the RBlade value to the true component temperature by calibration of the pyrometer.

Dependencies are inferred from the claim text.