Metal powder bed fusion (PBF) methods need in-process measurement methods to increase user confidence and encourage further adoption in high-value manufacturing sectors. In this paper, a novel measurement method for PBF systems is proposed that uses multi-view fringe projection to acquire high-resolution surface topography information of the powder bed. Measurements were made using a mock-up of a commercial PBF system to assess the system’s accuracy and precision in comparison to conventional single-view fringe projection techniques for the same application. Results show that the multi-view system is more accurate, but less precise, than single-view fringe projection on a point-by-point basis. The multi-view system also achieves a high degree of surface coverage by using alternate views to access areas not measured by a single camera.

中文翻译：

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用于金属粉末床融合过程中表面形貌测量的多视图条纹投影系统。

金属粉末床融合（PBF）方法需要过程中测量方法，以提高用户的信心并鼓励在高价值制造业中进一步采用。本文提出了一种新颖的PBF系统测量方法，该方法使用多视点条纹投影来获取粉末床的高分辨率表面形貌信息。使用商用PBF系统的模型进行测量，以评估该系统的准确性和精确度，与用于同一应用的传统单视场条纹投影技术相比。结果显示，在逐点的基础上，多视图系统比单视图条纹投影更准确，但精度更低。多视图系统还通过使用备用视图访问未由单个相机测量的区域来实现高度的表面覆盖。