Depto. de Ingeniería Robótica, Universidad Politécnica del Bicentenario, Carr. Silao-Romita Km 2, San Juan de los Duran, C.P. 36283 Silao, Guanajuato, Mexico.
TecNM/Instituto Tecnológico de Aguascalientes, Adolfo López Mateos 1801, 20256 Aguascalientes, Mexico.
Sensors (Basel). 2018 Dec 20;19(1):12. doi: 10.3390/s19010012.
A method for measuring planar temperature fields of fluid flows is proposed. The focusing schlieren technique together with a calibration procedure to fulfill such a purpose is used. The focusing schlieren technique uses an off-axis circular illumination to reduce the depth of focus of the optical system. The calibration procedure is based on the relation of the intensity level of each pixel of a focused schlieren image to the corresponding cutoff grid position measured at the exit focal plane of the schlieren lens. The method is applied to measure planar temperature fields of the hot air issuing from a 10 mm diameter nozzle of a commercial Hot Air Gun Soldering Station Welding. Our tests are carried out at different temperature values and different planes along the radial position of the nozzle of the hot air. The experimental values of temperature measurements are in agree with those measured using a thermocouple.
提出了一种测量流体流动平面温度场的方法。使用聚焦纹影技术和校准程序来实现这一目的。聚焦纹影技术使用离轴圆形照明来减小光学系统的景深。校准程序基于聚焦纹影图像中每个像素的强度水平与在纹影透镜出射焦平面上测量到的相应截止网格位置之间的关系。该方法应用于测量从商业热风枪焊接台的 10 毫米直径喷嘴喷出的热空气的平面温度场。我们的测试在不同的温度值和不同的平面上进行，这些平面沿着热空气喷嘴的径向位置。使用热电偶测量的温度实验值与测量值吻合。
