一、引言NASA刘易斯研究中心用试验方法测定了几种热偶探头的恢复修正、辐射修正和时间常数。试验目的是进行热偶探头的结构、尺寸和误差校验的标准化工作。误差校验的标准化可以降低传感器的成本。在具体应用中,热偶探头的选择要兼顾到许多特性,对探头尺寸的考虑很重要。本文研究了两种探头结构。一种是无屏蔽楔形探头,对十种不同尺寸的该种探头进行了校验;另一种是屏蔽楔形探头,对五种 I. INTRODUCTION NASA Lewis Research Center measured the recovery correction, radiation correction and time constant of several thermocouple probes by the test method. The purpose of the test is to standardize the structure, size and error checking of the thermocouple probe. The standardization of error checking can reduce the cost of the sensor. In specific applications, the choice of thermocouple probe to take into account many features, the size of the probe is important to consider. This paper studies two probe structures. One is unshielded wedge-shaped probe, the probe of ten different sizes of the probe was verified; the other is shielded wedge probe, the five