In-situ Extraction Method of Outer Surface Shape of Deforming Thermoplastic Materials during Combustion
In-situ Extraction Method of Outer Surface Shape of Deforming Thermoplastic Materials during Combustion
复制标题
热塑性材料燃烧变形外表面形状的原位提取方法
DOI：
10.11395/jjsem.17.191
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
中村 祐二
中科院分区：
文献类型：
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作者：
松岡 常吉;小池 悠太;中村 祐二
本研究提出了一种原位提取燃烧变形热塑性材料外表面形状的方法。所提出的方法包括对燃烧样本进行背光摄影，提取其阴影图并进行滤波后的反投影。通过初步测试，选择紫外LED作为背光光源，背光强度相对大于火焰化学发光。一种光学系统被开发出来，其中物体是可旋转的，而背光和相机是固定的。首先，进行了不燃烧的草稿试验，以验证所提出方法的有效性。然后用燃烧试样进行了试验，以检验该方法在燃烧变形物体外表面形状提取中的适用性。对当前系统的准确性进行了非燃烧和燃烧试验的评估。将重构图像的截面积与样品设计尺寸和激光位移传感器测量的截面积进行了比较。在此基础上，讨论了需要改进的几点。
This study proposes an in-situ method to extract the outer surface shape of deforming thermoplastic materials during combustion. The proposed method consists of backlight photography of the burning sample which enables extraction of its shadowgraph and following filtered back-projection. Ultraviolet LED is chosen as backlight source based on a preliminary test, which shows the intensity is relatively larger than that of chemiluminescence from flame. An optical system was developed, in which the object was rotatable while the backlight and the camera were fixed. First, a draft test without burning was conducted to confirm the validity of the proposed method. A test with a burning sample was then conducted to check the applicability to extraction of the outer surface shape of the deforming object during combustion. The accuracy of the current system was evaluated for both non-burning and burning tests. The cross-sectional area obtained from the reconstructed image was compared with that obtained from design dimension of sample and that measured by a laser displacement sensor. Several points to be improved are discussed based on the results.