A dynamic calibration system for transcient surface temperature transducers

A dynamic calibration system is developed which includes a pulse laser and a continue wave laser as the excitation sources, an optically conjugate focusing system and an infrared detection system. The temperature rise rate can be controlled by the pulsewidth of the laser and the amplitude by the laser output. A large aperture focusing system is used to raise the signal-to-noise ratio on the infrared detector, which, including its conditioning circuit, has a time constant as low as 0.17 μs, such that the real temperature-time relation can be received. The static temperature-voltage relation of the infrared detector and its conditioning circuit is also calibrated on that system. The only change is that the continue wave laser is used as exciting source. A quick response thermocouple has been tested on the system. The rise time of 0.68 μs shows that the performance of both the thermocouple and the calibration system is excellent