TDLAS技术温度测量的不确定度分析方法研究

Uncertainty Analysis Method in TDLAS Temperature Measurement

中文关键词:  可调谐二极管激光吸收光谱  温度测量  误差分析  不确定度评定

英文关键词:TDLAS  temperature measurement  error analysis  uncertainty evaluation

中文摘要:

      随着可调谐二极管激光吸收光谱（TDLAS）技术在工业测量与科学研究领域的广泛应用，对其测量结果的质量进行量化评定已成为迫切需要。以一套已集成的TDLAS测温系统为例，根据最新国家标准，基于不确定度传播律，理论分析了影响测温结果测量不确定度的因素，给出了评定TDLAS测温系统在线测量结果不确定度的一般方法。分析表明TDLAS系统测温结果的测量不确定度随所测温度值的变化而变化，并受所选谱线参数、吸收信号信噪比、系统响应情况等条件的影响。理论推导了针对测温系统的不确定度评定公式，结果表明对特定测温范围与测温系统，需对其进行温度标定，补偿系统误差。

英文摘要:

      Tunable diode laser absorption spectroscopy(TDLAS) technology has been widely used in the fields of industrial measurement and scientific research.Therefore,it is urgent to quantitatively evaluate the quality of its measurement results.A set of integrated TDLAS temperature measurement system was taken as an example,according to the latest national standard,based on the uncertainty propagation law,the factors affecting the measurement uncertainty of the temperature measurement results were theoretically analyzed.A general method for evaluating the uncertainty of online measurement results of TDLAS temperature measurement system was given.The analysis shows that the measurement uncertainty of the temperature measurement results changes with the measured temperature value,and is affected by the selected spectral line parameters,the signal-to-noise ratio of the absorption signal,and the system response.The uncertainty evaluation formula of temperature measurement system is theorotically derived.The results show that for a specific temperature range and temperature measurement system,temperature calibration is required to compensate for system errors.