Absolute radiation thermometer

摘要

An absolute radiation thermometer capable of evaluating the absolute value of infrared radiation power emitted from a target (1) and received by a radiation sensor by means of electrical calibration, and calculating the temperature of the target basing on the responsive signal generated in the radiation sensor (10, 100A, 100B, 100C, 100D, 100E, 100F, 100G). To solve "Microphonic" problem, two identical sensors connected in parallel with the polarized orientations of their pyroelectric layers being in opposite directions so as to cancel the piezoelectric signals generated in the two sensors are used. Further, by using a floating power supply, which is isolated from the system power supply of the thermometer, for performing electrical heating, power supply noise can be greatly reduced.