标题：Sub-Micro Particle Matter Detection for Metal 3-D Printing Workshop
作者：Qiao, Yingying; Tao, Jifang; Zhang, Yao; Qiu, Jifang; Hong, Xiaobin; Wu, Jian; Chen, Chia-Hung
作者机构：[Qiao, Yingying; Chen, Chia-Hung] Natl Univ Singapore, Dept Biomed Engn, Singapore 117583, Singapore.; [Qiao, Yingying; Qiu, Jifang; Hong, Xiaobin; 更多
通讯作者：Chen, CH;Qiu, JF;Chen, ChiaHung
通讯作者地址：[Chen, CH]Natl Univ Singapore, Dept Biomed Engn, Singapore 117583, Singapore;[Qiu, JF]Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & 更多
来源：IEEE SENSORS JOURNAL
关键词：Complicated parabolic collector (CPC); light scattering; Mie scattering;; particle sensor; backscattering
摘要：The metal powder as one kind of 3-D printing material is easy to diffuse into the air and suspend in the air in a long period because of its small size. Evidences show that particles with an aerodynamic diameter of less than 1.0 mu m seriously threaten human health because they can get deep into your respiratory and bloodstream system easily with the size decreasing. The conventional monitors for this fine-particle detection are either bulky or lack of accuracy in sub-micro particle detection. In this paper, we report a novel particle sensor for sub-micro, even nanoscale, particle detection. The particle sensor is based on an optical method in which an ultra-large collecting angle of scattered light is achieved by a complicated parabolic collector, and the final shape of core optical component is a cylinder with a dimension of 11 mm (height) x 25 mm (diameter). The testing results are consistent with the simulation results based on the Rayleigh scattering and Mie scattering theory model. Finally, the resolution of the particle sensor is around 7.9 mu g/m(3). It can be adopted by the applications of particle concentration detection in metal 3-D printing workshop.