Zapico Pablo, Meana Victor, Cuesta Eduardo, Mateos Sabino
Department of Construction and Manufacturing Engineering, Campus of Gijon, University of Oviedo, 33204 Gijon, Spain.
Materials (Basel). 2023 Aug 3;16(15):5443. doi: 10.3390/ma16155443.
Traditionally, 3D digitizing sensors have been based on contact measurement. Given the disadvantages of this type of measurement, non-contact sensors such as structured light sensors have gained the attention of many sectors in recent years. The fact that their metrological performance is affected by the optical properties of the digitized material, together with the lack of standards, makes it necessary to develop characterization work to validate materials and calibration artifacts for the qualification and calibration of these sensors. This work compares and optically characterizes different materials and surface finishes of reference spheres used in the calibration of two structured light sensors with different fields of application, with the aim to determine the most suitable sphere material-sensor combination in each case. The contact measurement system of a CMM is used as a reference and, for the processing of the information from the sensors, the application of two different filters is analyzed. The results achieved point to sandblasted stainless steel spheres as the best choice for calibrating or qualifying these sensors, as well as for use as registration targets in digitizing. Tungsten carbide spheres and zirconium are unsuitable for this purpose.
传统上，三维数字化传感器基于接触式测量。鉴于此类测量的缺点，近年来，诸如结构光传感器等非接触式传感器已引起许多领域的关注。其计量性能受数字化材料光学特性的影响，再加上缺乏标准，因此有必要开展特性描述工作，以验证用于这些传感器的鉴定和校准的材料及校准工件。这项工作对用于校准两个具有不同应用领域的结构光传感器的参考球的不同材料和表面光洁度进行了比较和光学特性描述，目的是确定每种情况下最合适的球材料 - 传感器组合。三坐标测量机的接触式测量系统用作参考，并且对于来自传感器的信息处理，分析了两种不同滤波器的应用。所取得的结果表明，喷砂不锈钢球是校准或鉴定这些传感器以及用作数字化中的配准目标的最佳选择。碳化钨球和锆不适合用于此目的。
