電気キャパシタンス・トモグラフィ法を用いた溶融プラスチック流れ場の断面温度分布計測

Abstract

This study has launched a concept to measure real time two-dimensional temperature distribution non-invasively by a combination of electrical capacitance tomography (ECT) technique and a permittivity-temperature equation for melting polyethylene (PE). The concept has two steps which are the relative permittivity calculation from the measured capacitance among the many electrodes by ECT technique, and the temperature distribution calculation from the relative permittivity distribution by permittivity-temperature equation. ECT sensor with 12-electrode was located an injection molding machine, which is designed to measure and visualize the cross sectional relative permittivity distribution. The images of the relative permittivity distribution were successfully reconstructed at every time step during the process. The images indicate that the value of wall side is difference from the centre area value.