基于地磁感应的新型无线车辆检测器设计

A New Design of Wireless Vehicle Detector Node Based on Geomagnetic Induction

摘要:

为了顺应智慧交通技术的发展需求,进一步提高车辆检测的准确率,提出了基于地磁感应的新型无线车辆检测器设计思想,该设计集成传感网ZigBee、时钟同步以及地磁感应等技术；检测器硬件以ZigBee芯片MC13213为核心,外围扩展无线高频模块,并通过IIC接口与地磁芯片MAG3110支撑电路相连；软件则是通过在主控芯片中植入具有地磁检测算法,运用时钟同步、无线网等技术从而实现车速、车长等重要数据估算；经过应用测试分析,该检测器器能针对不同车型、不同车速等作出正确响应,准确率可达97%以上,应用前景十分广阔。

Abstract:

In order to meet the requirements of intelligent transportation technology and further accuracy of vehicle detection, a new wireless vehicle detector based on geomagnetic induction was proposed which is integrated of ZigBee protocol of WSN, time synchronization, and geomagnetic induction. Detector hardware takes ZigBee MC13213 chip as the core, extended with peripheral high frequency module, and connects MAG3110 support circuit with IIC interface. Software was implanted into main control chip with geomagnetic detection algorithm, time synchronization and WSN technology to implement estimating vehicle speed, length and other important data. By experiments, this detector and make quick response to different type vehicle and different speed with 97 percent accuracy.