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一前言在使用红外测温仪器测量物体表面温度时,发射率的影响是很重要的因素。物体的辐射强度不仅取决于物体的温度,而且还取决于物体的黑度,即发射率(ε)。但发射率的准确数值是不易测得的。影响ε数值的因素很多,它与测量条件、物体的表面状况等都有很密切的关系。许多资料中提到,同一物体,在相同温度下,其辐射率往往有较大差异,这和上面所谈到的诸因素对测试条件的影响是分不开的。但具体到仪器使用时,因现
Preface The impact of emissivity is a very important factor when using infrared thermometers to measure the surface temperature of an object. The radiation intensity of an object depends not only on the temperature of the object but also on the blackness of the object, ie the emissivity (ε). However, the exact value of the emissivity is not easy to measure. Many factors affect the value of ε, which is closely related to the measurement conditions and the surface conditions of objects. Many sources mention that the same object, at the same temperature, often has a large difference in emissivity, which is inseparable from the influence of the above-mentioned factors on the test conditions. But specific to the instrument when used, because of the present