基于分形盒子维数的物流车辆位置追溯模型设计

王克铸

六安职业技术学院 经济管理学院，安徽 六安  237000

摘要：为解决传统物流车辆位置追溯模型存在信息转发限制、追溯时产生较大距离误差的问题，设计基于分形盒子维数的物流车辆位置追溯模型。将物流车辆所在空间整合为1个空间集合，确定物流车辆的分形盒子维数参数，采用两跳机制处理物流车辆的位置数据信息，将同步位置信息发送至处理基站，并转化数据包原有的转发限制，设定车辆位置更新流程，定义多重分形谱偏斜度，构建位置追溯模型。分别采用传统的基于微型电子机械系统（micro-electro mechanical system，MEMS）传感器的物流车辆位置及姿态追溯模型、基于轻量化图像分割的物流车辆特征定位模型及基于分形盒子维数的物流车辆位置追溯模型进行物流车辆位置追溯对比试验。结果表明：与传统的追溯模型相比，基于分形盒子维数的物流车辆位置追溯模型可正确匹配的物流车辆位置点最多，溯源位置误差最小。基于分形盒子维数的物流车辆位置追溯模型可为研究物流车辆追溯方法提供理论依据。

关键词：分形盒子维数；物流车辆；追溯模型；转发限制

The design of logistical vehicle location traceability model based on fractal box dimension

WANG Kezhu

School of Economics and Management, Lu′an Vocational Technical College, Lu′an 237000, China

Abstract:In order to solve the problems of limited information forwarding and large distance error showing in traditional logistical vehicle position tracing model, the logistical vehicle position tracing model based on fractal box dimension is designed. The new model includes many activities such as: the spaces where logistical vehicles are located are integrated into one space set; and fractal box dimension parameters of logistical vehicles are determined; then the two-hop mechanism is used to process the positions data of logistical vehicles, after that, the synchronous positioning information is sent to the processing base station; and the original forwarding restriction of data packets is transformed, and the updated process of vehicle positions is set, and the skewing degree of multi-fractal spectrum is defined, and the position traceability model is built. In order to trace the positions of logistical vehicle, the comparative tests among logistical vehicle position tracing models,including the traditional micro-electro mechanical system(MEMS), lightweight image segmentation based logistical vehicle feature tracking model and fractal box dimension based logistical vehicle position tracking model, are done. The results show that the logistical vehicle positions tracing model based on fractal box dimension can correctly match the most logistical vehicle positions compared with the traditional traceability model, and the traceability position error is the least. The position tracing model of logistical vehicle based on fractal box dimension can provide theoretical basis for the research of logistical vehicle tracing methods.

Keywords:fractal box dimension; logistical vehicle; tracing model; forwarding limitation