The space distributing characteristics of lattice temperature are described,and the influence of t_ temp(delay time of lattice temperature) on t_ drain(delay time of drain voltage) is proposed.

Based on the comparison method, the fast temperature calibration experiment with single contact point of thermocouple on LF5-constantan and 6063T6-constantan were carried out, then the perfect temperature calibration curves of this two kinds of aluminous alloys were obtained.

Several techniques, such as the compensation for the nonuniformity of the responsivity with a multiplier, the elimination of the nonuniformity of the background current with a digital type alteration processor, the improvement of the S/N ratio with multiple field averaging technique, to overcome the difficulties met in the temperature calibration of infrared TV systems are discussed.

The temperature calibration has an important impact on the temperature accuracy, which is one of the two key performance parameters of distributed fiber optic temperature sensing systems.

Under complicated and hard environment in blast furnace,a dynamic temperature calibration algorithm based on cross-beam temperature measurement is expounded,which connects the values of thermocouples with their corresponding areas of infrared image by gray scale statistical distribut.