中文摘要：

以成型中的聚合物为对象,研究处于高压、中温的密闭成型设备中的物料形变与流动行为的层析图像无损测量方法.首先,利用物料层析图像测量系统来获取由成型设备和聚合物物料组成的成型系统的层析图像.为了提高目标的信息量,以目标与背景的分割误差最小为条件,对密闭成型系统的层析图像进行处理,从中提取出物料的目标图像.然后,运用包括时间、空间、物质吸收系数等多参数的图像分割算法对物料层析图像进行特征提取 采用高维贯穿和低维分凝的层析链算法,对物料层析特征进行图像识别,利用物质吸收系数的阈值算法,对物料层析特征结构形态进行测量 利用物质吸收系数的阈值算法,对物料层析特征结构形态进行测量 通过物料层析特征结构在成型设备中的几何特征量及其分布来分析物料的流变行为.最后,对层析图像测量的实验进行了讨论.

英文摘要：

A nondestructive measurement of polymer rheological behavior in the processing device of high pressure and medium temperature is developed by computed tomography image. First, the tomography image of polymer and processing device is obtained by computed tomography measurement system. To increase the amount of object infor- mation, it is necessary to extract polymer （object） image from the tomography image of processing system by using the minimum error based on segmentation algorithm. The image segmentation of object character is put forward for polymer, which include many parameters, such as time, space and polymer absorption coefficient, according to tomography image feature. Then, it is carried out that object tomography image character is identified by the algo- rithm that the tomography chain of high dimension interpenetrate very strongly and the one of low dimension overlap only slightly. Next, the object character of tomography image is measured by polymer absorption coefficient and its image gray, which can measure not only the length, area and centroid of object features structure, but also the dis- tributing of object features structure along the radial and axial directions of the extruder screw. Finally, tomography image measurement experimental is discussed in detail.