两种多光谱高温计无源温区标定方法抗随机误差能力研究

Research on the Anti-Random Error Abilities of the Two Non-Source Temperature Calibration Methods of Multi-Spectral Pyrometer

两种多光谱高温计无源温区标定方法,即依据图形相似性原理的标定方法和依据高温计传递函数的标定方法。为验证两种方法的实用性,通过对黑体辐射出度加入不同大小的随机误差模拟不同测量精度的多光谱高温测量系统,对这两种方法的抗干扰能力进行了研究。实验结果证明,依据图形相似原理的标定方法具有强抗随机误差能力,适用于随机误差较大的测量系统。当随机误差很小时,其精度低于依据传递函数的标定方法,但当随机误差增加到一定范围,其精度远高于后者。基于高温计传递函数的标定方法虽在一定的随机误差范围内具有高的外推标定精度,但抗随机误差能力较弱,适用于随机误差小的测量系统。

In the present paper, the abilities of resistance to random error of the two non-source temperature calibration methods put forward previously were researched by adding random error of different sizes to blackbody radiant flux to simulate different precisions of the multi-spectral high temperature measurement system. Experimental results show that the non-source calibration method based on cure similarity principle （NCCSP） has strong anti-random error ability and it is suitable for large random error system. When the random error is very small, its precision is lower than the non-source calibration method based on the MSP transfer function （NCCTF）, but when the random error increases to a certain range, the NCCSP accuracy is much higher than the latter. The NCCTF in a certain random error range has a high calibration accuracy of the extrapolation, but its resistance to random error is weak and can be applied to the measurement system of small random error.