Surface form inspection with contact coordinate measurement: a review

Abstract

Parts with high-quality freeform surfaces have been widely used in industries, which require strict quality control during the manufacturing process. Among all the industrial inspection methods, contact measurement with coordinate measuring machines or computer numerical control machine tool is a fundamental technique due to its high accuracy, robustness, and universality. In this paper, the existing research in the contact measurement field is systematically reviewed. First, different configurations of the measuring machines are introduced in detail, which may have influence on the corresponding sampling and inspection path generation criteria. Then, the entire inspection pipeline is divided into two stages, namely the pre-inspection and post-inspection stages. The typical methods of each sub-stage are systematically overviewed and classified, including sampling, accessibility analysis, inspection path generation, probe tip radius compensation, surface reconstruction, and uncertainty analysis. Apart from those classical research, the applications of the emerging deep learning technique in some specific tasks of measurement are introduced. Furthermore, some potential and promising trends are provided for future investigation.

A smooth surface measurement method by flexible contact using multiple fingers device

“…Compensation operation is performed on Pt+1 point at point B, as shown in equation (11). Half chord length compensation hclsmall is obtained in the Y direction, and chord distance compensation dsmall is subtracted from the radius in the Z direction.…”

“…proposed [7][8][9], and a knowledge base model for inspecting prismatic parts with complex surfaces has been developed [10]. Shen et al [11] systematically summarized the existing research in the contact measurement field. The touch-trigger probe can measure in point-by-point or line scanning by a 3axes CMM.…”

Development of a Six-Degree-of-Freedom Analog 3D Tactile Probe Based on Non-Contact 2D Sensors

“…The size and weight of the system are also affected by the proposed applications for CMMs and MTs, and it could be used by design as a self-centering [15] or measuring probe. Thus, the developed probe could be integrated as an on-machine measuring system, which may be particularly useful for self-optimizing production systems, e.g., machine tool verification processes [16][17][18], or for surface form inspection [19].…”