Thin film resistance thermometer is usually used in shock wave tunnel to measure the heat flux. A postprocessor method which is based on one-dimension inverse heat conduction problem is studied and the coupling relationship between temperature rising and heat flux is considered to improve the data precision of heat flux measurement. One-dimension inverse heat conduction analysis method is used to convert voltage signal to heat flux. The distribution of temperature of platinum film is calculated by finite element method based on three-dimension and one-dimension semi-infinite heat conduction equation respectively, and the difference is studied to correct the postprocessor error. The postprocessor method is validated by comparison with CookFelderman and thermoelectric analog network method, and the method provides a "software" way to improve the precision of heat flux measurement.%薄膜电阻温度计是高超声速测热试验中一种常用的传感器,多用于激波风洞中.改进薄膜电阻温度计测热数据的后处理方法,分析其原理性误差,提出修正方法,可以进一步提高热流测量精度,为防热设计提供可靠数据.应用三维热传导理论,考虑热流和温升的耦合影响,计算了气动加热条件下薄膜电阻温度计结构温升情况,得到了铂层内的温度分布规律,并与一维半无限简化理论得到的薄膜电阻温度计表层温度相互对比,得到了模型简化带来的原理性误差;建立了由表面温升计算表面热流的导热反问题计算方法,与经典的Cook-Felderman处理公式和热电模拟网络处理方法相互对比,提出了修止热流值的方法,为提高热流测量精度提供了一种可行的手段.
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