基于多传感器融合的泊车位信息感知终端设计

Design of a parking space information perception terminal based on multi-sensor fusion

针对当前仅依赖人工的城市道路侧停车管理效率低下,而现存的基于单一传感器的智能道路侧停车管理系统存在准确率较低的问题,设计了一种基于多传感器融合的泊车位信息感知终端。该终端基于模糊逻辑推理理论,设计地磁判决算法,依据车辆出入位过程中产生地磁扰动变化特征提取特征变化量,结合微波雷达返回帧和红外测距值确定多状态机跳转条件,当系统判决存在冲突时,各传感器的单一判决结果将借助基本信度分配函数量化成信度值输入到D-S证据融合中心,从而实现冲突判决。实验结果表明,终端识别准确率达到99.2%,对提升城市道路侧车位管理效率、缓解城市停车压力具有重要意义。

In view of the low efficiency of urban roadside parking management which only relies on manual work at present,and the accuracy bottleneck of the existing intelligent roadside parking management system based on a single sensor,a parking information perception terminal based on multi-sensor fusion is designed.The terminal is based on fuzzy logic reasoning,and adopts the geomagnetic decision algorithm to extract the feature change according to the geomagnetic disturbance generated during the process of vehicle entry and exit.The switch condition of the multi-state machine is determined by combining the microwave radar return frame and the infrared ranging value.When the system detects conflict,the single decision result of each sensor will be quantized into a confidence value through the basic reliability distribution function and input to the D-S evidence fusion center to make the decision.The experiment show that the accuracy rate of the terminal recognition reaches 99.2%,which is of great significance for the improvement of the management efficiency of urban roadside parking space.