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由于红外技术的发展,人们对热象仪提出了量度要求,以期获得不仅是定性的,而且是定量的物体的热场信息。为了校准热象仪的测量通道,采用由一个或几个辐射面构成的红外辐射器作为校准用的辐射源,其温度可以精确地调节并稳定在零点几度,然而,这种辐射器不能保证校准的精度。因为,接收的红外辐射通量,即红外探测器的信号电压与探测物体的温度成非线性关系。因此,必须全面校准热象仪传递函数的线性。为此,就需要有这样一种辐射器,其辐射表面的温度与几何参数如辐射面的长度成线性关系,即需要一种热楔型
Due to the development of infrared technology, people put forward the measurement requirements for the thermal imager in order to obtain the thermal field information of not only qualitative but also quantitative objects. In order to calibrate the measuring channel of the thermal imagers, the use of an infrared radiator consisting of one or several radiating surfaces as a source of radiation for its calibration can be precisely regulated and stabilized at zero degrees, however, this radiator can not be guaranteed Calibration accuracy. Because, received infrared radiation flux, infrared detector signal voltage and the temperature of the probe into a non-linear relationship. Therefore, the linearity of the thermometer transfer function must be fully calibrated. To this end, there is a need for a radiator whose radiant surface temperature is linearly related to geometric parameters such as the length of the radiating surface, ie a thermal wedge