J. Mike Walker '66 Department of Mechanical Engineering, Texas A&M University 3123 TAMU, College Station, Texas 77843, USA.
Rev Sci Instrum. 2023 Mar 1;94(3):035109. doi: 10.1063/5.0135514.
This paper presents novel surface profilometry for both geometric part error and metallurgical material property distribution measurements of the additively manufactured and post-processed rods. The measurement system, the so-called fiber optic-eddy current sensor, consists of a fiber optic displacement sensor and an eddy current sensor. The electromagnetic coil was wrapped around the probe of the fiber optic displacement sensor. The fiber optic displacement sensor was used to measure the surface profile, and the eddy current sensor was used to measure the change in permeability of the rod under varying electromagnetic excitation conditions. The permeability of the material changes upon exposure to mechanical forces, such as compression or extension and high temperatures. The geometric part error and material property profiles of the rods were successfully extracted by using a reversal method that is conventionally used for spindle error separation. The fiber optic displacement sensor and the eddy current sensor developed in this study have a resolution of 0.286 µm and 0.00359 μ, respectively. The proposed method was applied not only to characterize the rods but also to characterize composite rods.
本文提出了一种新颖的表面轮廓测量方法，可同时测量增材制造和后处理棒材的几何零件误差和冶金材料性能分布。该测量系统，即所谓的光纤电涡流传感器，由光纤位移传感器和电涡流传感器组成。电磁线圈缠绕在光纤位移传感器的探头周围。光纤位移传感器用于测量表面轮廓，电涡流传感器用于测量在不同电磁激励条件下棒材磁导率的变化。材料的磁导率会因机械力（如压缩或拉伸以及高温）而发生变化。通过使用传统上用于主轴误差分离的反转方法，成功地提取了棒材的几何零件误差和材料性能轮廓。本研究中开发的光纤位移传感器和电涡流传感器的分辨率分别为 0.286 µm 和 0.00359 μ。该方法不仅应用于棒材的特性化，也应用于复合材料棒材的特性化。
