基于有源RFID的牧场定位技术研究

Research on pasture positioning technology based on active RFID

随着物联网技术的发展,无线传感网络对牧场管理显得日益重要。在原有可溯源射频识别(RFID)标签的基础上,牧场提出了增加生命体征监测及定位的需求。针对牧场对奶牛的实时监控管理需求,设计了一种能采集动物体温的有源RFID标签以及一种基于接收信号强度(RSSI)测距的定位算法。实现与测试了有源RIFD标签及定位算法,标签发射距离可达50 m,定位算法在20×20 m2范围内平均定位精度为1.39 m,满足牧场对奶牛定位及生命体征监测的需求。

With the development of Internet of Things,wireless sensor network is becoming more and more important for pasture management.On the basis of the original traceable Radio Frequency Identification（ RFID） tags,the demand for monitoring and positioning of vital signs was put forward. Aiming at the needs of real-time monitoring and management of dairy farms,a new active RFID tag that can collect animal temperature and a location algorithm based on Received Signal Strength Indication（ RSSI） ranging is designed. The RIFD tag and the positioning algorithm are realized and tested,the launch distance of the tag is up to 50 m,the average positioning accuracy of the algorithm in the 20 × 20 m2 range is 1. 39 m,which can meet the needs of dairy cattle positioning and vital signs monitoring.