Devesse Wim, De Baere Dieter, Guillaume Patrick
Vrije Universiteit Brussel, Department of Mechanical Engineering, Pleinlaan 2, B-1050 Brussels, Belgium.
Sensors (Basel). 2017 Jan 5;17(1):91. doi: 10.3390/s17010091.
A contactless temperature measurement system is presented based on a hyperspectral line camera that captures the spectra in the visible and near infrared (VNIR) region of a large set of closely spaced points. The measured spectra are used in a nonlinear least squares optimization routine to calculate a one-dimensional temperature profile with high spatial resolution. Measurements of a liquid melt pool of AISI 316L stainless steel show that the system is able to determine the absolute temperatures with an accuracy of 10%. The measurements are made with a spatial resolution of 12 µm/pixel, justifying its use in applications where high temperature measurements with high spatial detail are desired, such as in the laser material processing and additive manufacturing fields.
提出了一种基于高光谱线相机的非接触式温度测量系统，该相机可捕获大量紧密间隔点的可见和近红外（VNIR）区域的光谱。测量得到的光谱用于非线性最小二乘优化程序，以计算具有高空间分辨率的一维温度分布。对AISI 316L不锈钢液体熔池的测量表明，该系统能够以10%的精度确定绝对温度。测量的空间分辨率为12 µm/像素，这证明了它在需要高空间细节的高温测量应用中的适用性，例如在激光材料加工和增材制造领域。
