基于旋转体视的润滑油固体颗粒污染物三维外型检测

Three-dimensional Shape Measurement of Particles Contamination in Lubricant Based on Rotational Stereoscopic Vision

为了深入研究固体颗粒污染物的特性以及对摩擦副滑润、磨损影响的机制,确定固体颗粒的三维特征变得十分重要。针对固体颗粒三维外型特征的测量,首先研究了旋转体视显微检测理论,利用四元数表示法描述了绕任意轴旋转的旋转体视模型,根据该模型提出了成像极线几何关系,并由极线几何约束引出F矩阵来计算三维坐标点。在旋转体视显微检测的理论基础上,提出了旋转体视显微检测系统总体方案、硬件组成和软件功能模块,进行了系统开发与实现,并对固体颗粒进行了旋转体视显微检测应用研究。研究表明:旋转体视显微检测系统实现了对润滑油固体颗粒污染物的三维外型检测,可以计算出三维坐标点,最终恢复得到固体颗粒的三维模型。

In order to research the characteristics of particles and its effecting mechanism to lubrication and wear, it is important that show three-dimensional shape of particles. Aimed at three-dimensional shape measurement of particles, the three-dimensional rotational stereo measuring theory was researched, rotational stereoscopic model was described by quaternion method, imaging polar line geometrical relationship was put forward, F matrix was deduced by polar geometry, and three dimensional coordinate point was calculated by using F matrix. A visual measuring instrument based on micro rotational stereoscopic vision was developed, the general solution of the system was given, and the hardware and software of the system was designed and achieved. The particles contamination was measured by using the three-dimensional rotational stereoscopic measuring system. The results show that three-dimensional stereoscopic measuring system can measure threedimensional shape of particle contamination, and calculate three-dimensional coordinate point, and reconstruct three-dimensional model.