Dynamic calibration method of temperature sensor based on Quasi-delta pulse temperature excitation
Dynamic calibration method of temperature sensor based on Quasi-delta pulse temperature excitation
复制标题
基于准δ脉冲温度激励的温度传感器动态校准方法
DOI：
10.1002/mop.30944
复制
发表时间：
2018
影响因子：
1.5
通讯作者：
Cheng Hang
中科院分区：
文献类型：
--
作者：
Li Yanfeng;Zhang Zhijie;Hao Xiaojian;Cheng Hang
针对温度传感器动态校准方法中存在的问题，提出准δ脉冲温度动态校准方法。阐述了准δ脉冲动态校准原理，分析了准δ脉冲函数的特点，得到了准δ信号脉冲宽度、可校准频率范围和校准精度之间的关系。以激光为热源构建准δ脉冲温度动态校准系统，产生动态校准所需的激发温度。系统中光学聚焦系统采用椭球面镜设计，具有更好的共轭成像性能。应用动态校准系统对K型铠装热电偶进行动态校准，并采用基于特殊白化滤波器的广义最小二乘法建立了被校准热电偶的数学模型。分析了热电偶的时域和频域动态特性。
Aiming at the existing problems in the dynamic calibration method of temperature sensor, Quasi‐δ pulse temperature dynamic calibration method is proposed. The Quasi‐δ pulse dynamic calibration principle was described, the characteristics of Quasi‐δ pulse function were analyzed, and the relationship among pulse width of Quasi‐δ signal, frequency range that can be calibrated, and calibration precision was obtained. Quasi‐δ pulse temperature dynamic calibration system was built using the laser as the heat source which generates the excitation temperature required for dynamic calibration. In the system, optical focusing system was designed using ellipsoidal mirror which has a better conjugate imaging property. Applying the dynamic calibration system, a K‐type armored thermocouple was calibrated dynamically, and mathematical model of the calibrated thermocouple was established by generalized least squares method based on a special whitening filter. Dynamic characteristics of the thermocouple in time domain and frequency domain were analyzed.