Noninvasive real-time 2D imaging of temperature distribution during the plastic pellet cooling process by using electrical capacitance tomography
Noninvasive real-time 2D imaging of temperature distribution during the plastic pellet cooling process by using electrical capacitance tomography
复制标题
DOI：
10.1088/0957-0233/27/1/015403
复制
发表时间：
2016-01-01
影响因子：
2.4
通讯作者：
Takei, Masahiro
中科院分区：
文献类型：
--
作者：
Hirose, Yusuke;Sapkota, Achyut;Takei, Masahiro
本研究提出了一种概念，通过结合电容层析成像（ECT）技术和塑料颗粒冷却过程的介电常数-温度校准方程，对实时二维温度分布进行无创成像。该概念分为两个步骤，即通过ECT技术从多个电极之间测量的电容中计算相对介电常数，以及通过介电常数-温度校准方程从相对介电常数中成像温度分布。设计了一种具有12个电极的ECT传感器，用于对聚甲基丙烯酸甲酯颗粒冷却过程中的截面温度分布进行成像。在此过程中，利用相对介电常数分布成功地重建了温度分布图像。与分析热导模拟和热电偶测量相比，图像合理地显示了温度在二维空间和时间中的扩散，随时间变化的温度偏差在0.0065和0.0175之间。
This study has launched a concept to image a real-time 2D temperature distribution noninvasively by a combination of the electrical capacitance tomography (ECT) technique and a permittivity-temperature calibration equation for the plastic pellet cooling process. The concept has two steps, which are the relative permittivity calculation from the measured capacitance among the many electrodes by the ECT technique, and the temperature distribution imaging from the relative permittivity by the permittivity-temperature calibration equation. An ECT sensor with 12 electrodes was designed to image the cross-sectional temperature distribution during the polymethyl methacrylate pellets cooling process. The images of temperature distribution were successfully reconstructed from the relative permittivity distribution at every time step during the process. The images reasonably indicate the temperature diffusion in a 2D space and time within a 0.0065 and 0.0175 time-dependent temperature deviation, as compared to an analytical thermal conductance simulation and thermocouple measurement.