The Adaptive Approach to Measurements of Deviations of Cylindrical Parts

Abstract

Measurements of form deviations of 3D elements can be conducted with various strategies. Such strategies differ in a number and distribution of sampling points located on an investigated surface. The low number of sampling points can bring about the situation that some surface irregularities cannot be detected by a measuring system. An application of higher density of sampling points, in turn, results in significant lengthening of measurement time, which is undesirable. This is why the authors propose to develop a novel adaptive measurement strategy. Proposed adaptive strategy consists of two stages: a preliminary measurement and additional measurements. During the preliminary measurement, an investigated area is scanned along a preselected trajectory. If the measurement results show that there is a significant change in sensor readings in a certain fragment of an investigated surface, then we conduct additional measurements in the area where the large change in sensor readings occurred. The paper presents the state-of-the-art on contemporary measurement strategies of 3D elements and fundamentals of the adaptive strategy proposed by the authors.

An Iterative Minimum Zone Algorithm for assessing cylindricity deviation

“…For example, the helical trace strategy is a compromise solution between the Roundness profile and Generatrix strategies. Though the helical trace strategy was not described in the standard ISO 12180, it is often applied under industrial conditions [58,59]. IMZA can complete the calculation using the data obtained through the helical trace measurement strategy.…”