摘要
为提高停车位信息采集的实时性与可靠性,利用CAN总线通信技术设计并实现1种感知停车场车位空满状态的检测器。提出车位检测器总体技术架构与硬件组成,分析软件设计流程、车位检测优化算法、以及通信报文协议,并给出具体实现方案。通过对100个设备节点进行组网测试,结果表明:检测器的车位状态判定准确率大于98%,车位信息报文上传时延小于1.5ms,丢包率小于1%。
In order to improve the reliability and real-time parking information collection,a detector which can sense the free or occupied parking space based on CAN-bus communication technology is designed and realized.This research proposes the overall technical architecture and the hardware structure of the detection system,and it analyzes the software design procedure,the optimization algorithm of parking space detection,and the protocol of communication for a concrete implementation scheme.The test of 100-device node network shows that the accuracy of parking space determination is higher than 98%,while the message upload delay of each node is less than 1.5ms and the packet loss rate is less than 1%.
出处
《交通信息与安全》
2014年第4期137-142,159,共7页
Journal of Transport Information and Safety
基金
上海市科学技术委员会项目(批准号:11dz1201500)资助
关键词
智能交通
停车位检测器
CAN总线
超声波测距
报文协议
intelligent transportation
parking space detector
CAN-bus
hardware structure
optimization algo-rithm
message protocol
