基于图像配准与融合的胎/路接触应力测试方法

Tire-Road Contact Stress Testing Method Based on Image Registration and Fusion Technology

提高路面抗滑性能是解决道路交通安全问题的关键,而轮胎与路面粗糙构造的接触行为本质上是接触力学问题。为获得轮胎与粗糙路面的完整接触应力信息,文中采用柔性薄膜压力胶片传感技术,并借助医学图像处理技术,提出一种基于图像配准与融合的胎/路接触应力测试方法,并进行了配准与融合效果评价、适应性分析。结果表明:基于轮胎与路面的接触印痕的双目标特征,采用进化算法可以解决多规格胶片图像配准收敛与最优解问题;文中提出的动态参考图像配准(DRIR)算法具有较高的配准精度和运算效率,在不同沥青路面均具备良好的适应性,路面的接触应力集中分布指标相对误差可控制在5%以内。文中测试方法操作简单、测量精度高、数据三维直观,为轮胎接地特性与路面抗滑性能研究提供了一种新的技术手段。

The skid resistance performance of the pavement is the key to solve the traffic safety problem, and the contact behavior between the tire and the rough surface texture is essentially a contact mechanics problem. In order to obtain the complete contact stress information of tire and rough pavement, this study adopted flexible pressure film sensor technology. A tire-road contact stress testing method based on image registration and fusion technology was proposed with the help of medical image process technology. And the registration and fusion effect evaluation and adaptability analysis were carried out. The results show that, based on the dual objective characteristics of the contact imprints between tire and pavement, the problem of convergence and optimal solution of multi-specification film image registration can be resolved by evolutionary algorithms. The proposed dynamic reference image registration(DRIR) algorithm has high registration accuracy and computational efficiency, and it can be applied to diffe-rent asphalt pavements. The relative error of the contact stress concentration distribution index can be restricted within 5%. The proposed method is easy to operate, accurate and 3 D visual, and provides a new technical means for the study of tire-ground characteristics and pavement skid resistance performance.