交通信息与安全2016，Vol.34Issue(5)：53-60,8.DOI:10.3963/j.issn1674-4861.2016.05.008
基于矢量运算和多级阈值判断的地磁车位占用检测算法研究
A Detection Algorithm of Parking Occupancy via Geomagnetic Field Based on Vector Operation and Multilevel Threshold
王维锋 1万剑 1谢斌 1周云城 1谭挺1
作者信息
- 1. 中设设计集团股份有限公司 南京 210014
- 折叠
摘要
Abstract
An algorithm is proposed to deal with the issues that the existing detection algorithms cannot exclude the interference of ortho parking spaces and the corresponding judgment criteria fail to accommodate multiple types of vehicles and parking scenarios.Based on the analysis of the magnetic dipole model, the geomagnetic disturbance vector of targeted parking space is extracted through a vector operation during parking process, which can effectively eliminate the negative impact on geomagnetic field caused by the parking process from the ortho parking spaces.With a collection of large number of real geomagnetic disturbance data, the intensity of geomagnetic disturbances and characteristics of direction changes are statistically deduced and the multilevel thresholds are thus determined as the detection criterion, which ensures that the detection algorithm is suitable to various vehicle types and parking application scenarios.With a three-month field test, it is found that the detection precision of the proposed algorithm achieves 99.3%, superior to the algorithms with a single-feature using either pure intensity or certain direction.Moreover, the method could detect whether the parking is standard.The algorithm has not been applied to large passenger cars, trucks or special vehicles.关键词
智能交通/车位占用检测算法/多级阈值/地磁场扰动/矢量运算Key words
intelligent transportation/detection algorithm of parking occupancy/multilevel threshold/disturbance of geomagnetic field/vector calculation分类
信息技术与安全科学引用本文复制引用
王维锋,万剑,谢斌,周云城,谭挺..基于矢量运算和多级阈值判断的地磁车位占用检测算法研究[J].交通信息与安全,2016,34(5):53-60,8.
