温度监测系统中传感器网络和RFID半无源标签的硬件动态行为评估

Hardware Dynamic Behavior Assessing of WSN and Semi-passive RFID Tags in Temperature Monitoring System

针对传统的低温监控系统容易忽略硬件动态行为特性的问题,提出一种基于无线传感器网络(Wireless Sensor Network,WSN)和射频识别(Radio Frequency Identification,RFID)半无源标签的动态行为评估方法。实验的测试温度有冷冻室温度(5℃)、室内温度(23℃)和温室温度(35℃),并对3种不同传感器配置的WSN尘粒和4种RFID标签(封装或不封装)进行比较。为了评估硬件的动态范围,对传感器一阶响应进行对数和非线性拟合。实验结果显示,含有无线和RFID节点的温度传感器封装方式会影响其动态响应,其特性可以监控高速变化的温度,保证低温运输系统的正常运行。

For the issue that traditional low temperature monitoring systems tend to ignore the dynamic behavior characteristics of hardware,a dynamic behavior characteristic assessing method based on wireless sensor networks（ WSN） and semi-passive tags of radio frequency identification（ RFID） is proposed. Thus,the aim is to evaluate the sensors dynamic behavior. The experimental test temperature is freezer temperature（ 5 ℃）,room temperature（ 23 ℃） and greenhouse temperature（ 35 ℃）. And three different sensor configurations WSN motes particles and four kinds of RFID tags（ packaged or not packaged） were compared. In order to assess the hardware dynamic range of the sensor response,first-order response of the sensor is logarithmically and nonlinearly fitted. Experimental results show that the temperature sensor packages containing wireless and RFID nodes will affect the dynamic response,and its properties can monitor fast temperature changes,ensuring the normal operation of the cold chain system.