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为提高红外热像仪图像及测温精度,根据红外热像仪的测温原理和红外辐射原理,通过使用红外热像仪、CCD相机以及激光表面形状测量显微镜,研究了SUS304钢在单轴拉伸塑性变形过程中表面粗糙度与目标发射率的关系;并用热电偶和红外热像仪对塑性变形过程中的温度分布进行了测量。研究结果表明,目标发射率随表面粗糙度成比例增大,造成红外热像仪测定的塑性变形区域比实际变形区域大;通过预先设定材料的表面粗糙度,以提高有效目标发射率,能得到较好的红外图像和测温精度。
In order to improve the thermal imaging camera image and temperature measurement accuracy, according to the principle of thermal imaging and infrared radiation principle of infrared thermal imager, by using infrared camera, CCD camera and laser surface shape measurement microscope, The relationship between surface roughness and target emissivity during plastic deformation was measured. The temperature distribution during plastic deformation was measured by thermocouple and infrared thermography. The results show that the target emissivity increases proportionally with the surface roughness, resulting in the area of plastic deformation measured by the infrared camera being larger than the actual deformation area. By pre-setting the surface roughness of the material to improve the effective target emissivity, Get better infrared image and temperature measurement accuracy.