曲轴影像测量系统精度与误差补偿技术研究

发布时间：2018-10-25 09:23

【摘要】：由于发动机曲轴对汽车性能具有重要的影响，所以曲轴的制造已经成为汽车制造业关键步骤。过渡沟槽是曲轴中重要的结构，它使得轴颈上应力不会集中，保证曲轴使用时不会发生疲劳破损，因而对曲轴关键尺寸进行高精度测量已是保证曲轴制造精度及性能效率的重要方式。随着发动机曲轴加工精度的提高，其测量的精度要求也更高，对曲轴影像系统进行精度和误差补偿能够进一步提高测量的精度，具有十分重要的意义。基于已开发的曲轴影像系统，分析了系统测量精度和误差等多方面的影响因素，并进行了分析、优化和处理。研究了高质图像获取技术，通过改善系统硬件、优化核心算法和提出的快速二维标定方法，提高曲轴影像系统的测量精度。研究了基于多体系统的空间误差建模方法，对曲轴影像系统的空间误差进行了系统、全面的分析，然后建立了曲轴影像系统的空间误差模型，并优化了模型。研究了基于激光跟踪仪的空间误差的快速精确测量方法，包括曲轴影像系统几何误差的测量并分析了误差对曲轴影像系统的影响；三维空间运动误差的测量并对测量结果进行了处理分析，得到了各项空间误差因素的值。对基于激光跟踪仪的曲轴影像系统误差建模与误差测量方法进行了实验验证，，利用激光跟踪仪可以对曲轴影像系统的空间误差进行快速、准确的测量。首先测量和分析了曲轴影像系统的几何误差，然后测量了三维空间运动误差并计算各项误差源的值，最后进行系统综合误差补偿精度验证，提高了曲轴影像系统的测量精度。
[Abstract]:Since the engine crankshaft has an important influence on the performance of the automobile, the manufacture of the crankshaft has become a key step in the automobile manufacturing industry. The transition groove is an important structure in the crankshaft, so that the stress on the journal is not concentrated, the fatigue damage does not occur when the crankshaft is used, and therefore, the key dimension of the crankshaft is measured with high precision, which is an important way to ensure the manufacturing precision and the performance efficiency of the crankshaft. With the improvement of the machining precision of the crankshaft of the engine, the precision requirement of the measurement is higher, and the precision and error compensation of the crankshaft image system can further improve the accuracy of the measurement, and it is very important. Based on the developed crankshaft image system, the factors affecting the measurement accuracy and error of the system are analyzed, and the analysis, optimization and optimization are carried out. This paper deals with the high quality image acquisition technology, improves the system hardware, optimizes the kernel algorithm and the proposed fast two-dimensional calibration method, and improves the image system of the crankshaft. The space error modeling method based on the multi-body system is studied, the space error of the crankshaft image system is systematically analyzed, and then the space error model of the crankshaft image system is established. The model is optimized and the model is optimized. The rapid measurement method of space error based on laser tracker is studied, including the measurement of the geometric errors of the crankshaft image system and the influence of the error on the crankshaft image system. The measurement results are analyzed and analyzed. In this paper, the system error modeling and error measuring method of crankshaft image based on laser tracker is experimentally verified. firstly, measuring and analyzing the geometric error of the crankshaft image system, measuring the motion error of the three-dimensional space and calculating the value of each error source, and finally verifying the system comprehensive error compensation precision,
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH161.5;TP391.41

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