Full geometric information measuring model of 3D gear based on laser scanning techniques

Gears are now the basic components of intelligent manufacturing. In this paper, a full geometric information measuring model of 3D gear was developed based on laser scanning techniques. In order to generate a optimum sampling path, a measuring cost function was proposed by considered of the relationship among the sampling interval, sampling point clouds, and measurement precision of key features. On the other hand, 3D tooth surface measurement error was described by quantitative point cloud data. An commercial 3D gear measuring system was also introduced, which has a degrees of laser scanner and self-developed special analysis software. Finally, a series of experiments on typical cylindrical gears (base circle diameter from 100mm to 500mm) were performed to demonstrate this automated path planning technique, measurement cost, and the full geometric measurement accuracy. Those results have been proven to be amenable for practical purposes through many tests so that it might be applicable to achieve full geometric information measuring of 3D gear.