摘要
针对一些坑道式地下工程需要实现对工作人员实时管控的需求,构建了基于智蜂(ZigBee)无线传感器网络和射频识别(Radio Frequency Identification,FRID)技术的人员管控系统。电子标签的发射功率估算是人员管控系统设计的重要方面,在分析几种典型无线传播模型的基础上,得出了各模型的优缺点和适用范围。就适于地下工程的分隔损耗模型,分析了电子标签发射功率与无线传播距离和传感器节点接收灵敏度之间的关系,并对有源电子标签所需的最小发射功率进行了估算,结果表明,选用最大发射功率为0 dBm,接收灵敏度为-92 dBm的无线芯片便可以满足有源电子标签的设计需求。
In view of the demand for staff management and control in some underground project, this paper designs a personnel management and control system based on ZigBee wireless sensor networks and radio frequency identification （RFID） technology. The transmit power estimation of electronic tag is an important aspect in the system design. Based on analysis of several typical wireless propagation models, the advantages and disadvantages and the scope of application are obtained. With separate-loss model of underground project, this paper analyzes the relationship between the transmit power of electronic tag and the distance of radio propagation as well as the reception sensitivity of sensor node. The results show that the wireless chips with maximum transmit power of 0dBm and reception sensitivity of -92dBm can meet the design requirement of the active electronic tag.
出处
《无线电通信技术》
2013年第3期69-72,共4页
Radio Communications Technology
关键词
无线传感器网络
射频识别
传播模型
功率估算
Wireless Sensor Networks （WSN）
Radio Frequency IDentification （RFID）
propagation model
power estimation
