精准数据中农业低功耗无线网络传感系统研究  

Research on agricultural low-power wireless network sensing system in precision data

作　　者：龙君芳 LONG Jun-fang(School of Data Science and Computer Science,Guangdong Peizheng University,Guangzhou 510000,Guangdong,China)

机构地区：[1]广东培正学院数据科学与计算机学院,广东广州510000

出　　处：《贵阳学院学报（自然科学版）》2023年第3期45-49,共5页Journal of Guiyang University：Natural Sciences

摘　　要：针对精准数据管理中植物失水胁迫监测所需的传感问题,提出了一种低成本、低功耗的新型无线传感系统,以便更好地替代传统的土壤水分测量。首先,该系统采用两个温度传感器测量叶片和空气之间的温差。其次,使用标签通过模数转换器从叶子传感器收集信息,并使用单站后向散射体系结构与低成本的软件定义无线电读取器进行远程通信。该标签由传感器板、微控制器、外部定时器和用于通信的射频前端组成。定时器产生用于同时访问多个标签的子载波频率。最后,该系统采用868 MHz载波的低复杂度摩尔斯电码进行无线通信调制,且由一个柔性太阳能电池板供电。室内环境中的单站样机测试结果表明,在活动模式下的最大功耗分别为20.7μW和362μW,在休眠模式下的功耗仅为1μW,在2m距离内接收端可清楚地呈现传输的码字,适用于大规模精准农业应用中的环境参数分布式监测。A new wireless sensor system with low cost and low power consumption is proposed to replace the traditional soil moisture measurement in order to monitor the water loss stress of plants in accurate data management.Firstly,the system uses two temperature sensors to measure the temperature difference between the blade and the air.Secondly,the tag is used to collect information from the leaf sensor through the analog-to-digital converter,and the single-station backscattering architecture is used for remote communication with the low-cost software-defined radio reader.The tag consists of a sensor board,a microcontroller,an external timer and a radio frequency front-end for communication.A timer generates subcarrier frequencies for accessing multiple tags at the same time.Finally,the system uses 868MHz carrier Morse code for wireless communication modulation,and is powered by a flexible solar panel.The results of single-station prototype test in indoor environment show that the maximum power consumption in active mode is 20.7μW and 362μW respectively,and the power consumption in dormant mode is only 1W.The receiver can clearly present the transmitted code words within 2m distance,which is suitable for distributed monitoring of environmental parameters in large-scale precision agriculture applications.

关 键 词：精准农业 传感网 射频识别 软件定义无线电 摩尔斯电码 

分 类 号：TN929.1[电子电信—通信与信息系统]