基于微生物燃料电池供能的无线温度传感系统设计  

Design of wireless temperature sensing system powered by mcrobial fuel cell

作　　者：罗志聪[1,2] 王帅 唐家桓 李景虎 叶大鹏 Luo Zhicong;Wang Shuai;Tang Jiahuan;Li JingHu;Ye Dapeng(College of Mechanical and Electronic Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;FujianEngineering Research Center of Modern Agricultural Equipment,Fujian Agriculture and Foresty University,Fuzhou 350002 China;College of Resources and Environment,Fujian Agriculture and Forestry University,Fuzhou 350002 China;College of Computer and Information Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002 China)

机构地区：[1]福建农林大学机电工程学院,福州350002 [2]现代农业装备福建省高校工程研究中心,福州350002 [3]福建农林大学资源与环境学院,福州350002 [4]福建农林大学计算机与信息学院,福州350002

出　　处：《农业工程学报》2019年第12期209-216,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：福建省自然科学基金(2018J01533);福建省教育厅中青年教师教育科研项目(JAT160156);福建省高峰高原学科项目(712018014);海峡博士后交流资助计划

摘　　要：微生物燃料电池(microbial full cell,MFC)是利用微生物作为生物催化剂将碳水化合物转化为电能的装置。针对MFC输出电压低、功率小、内阻大的特点,该文研制了一种具有最大功率点跟踪(maximum power point tracking,MPPT)功能的能量收集电路和两级升压电路;基于MSP430和CC2500芯片设计了环境温度传感系统。测试结果表明,MFC的输出电压维持在316~390 mV范围内,实现了最大输出功率的跟踪,MPPT电路和升压电路分别输出1.1和3.5 V电压;无线温度传感器以每13 ms的周期将环境温度无线传输到远程终端,验证了环境温度传感系统在最大功率点处对无线传感器网络节点供电工作的可行性,可为实现MFC主动式能量收集提供参考。With the modernization of agriculture and social informatization,the internet of things(IoT)and the wireless sensor network(WSN)are widely used in the agricultural application.The sensor nodes play important roles in IoT and WSN system,which have strict requirements on the battery.In the traditional scheme,WSN is powered by the lithium battery or solar panel.It is very hard to recharge the lithium battery in the wild,while the solar panel is greatly limited by the environment.It brings great challenge to the power supply of sensor nodes.The microbial full cell(MFC)is one of the most promising renewable energy,which can be used for the self-power supply of the sensors in real application.MFC uses microbes as biocatalysts,which can transform carbohydrates into electrical energy.In order to improve the efficiency of MFC,lots research has been done.The maximum power output of MFC has been gradually improved.However,the output open-circuit voltage of MFC is low,about 0.7 V,and the internal resistance is large,so it is impossible to ensure the MFC working at the maximum power point.Based on the polarization curve and output power density of the MFC reactor,a power management module is designed to improve the efficiency of MFC in this paper.The output power management module consists of an energy harvesting circuit and a secondary booster circuit.The energy harvesting circuit consists of a DC-DC converter,hysteresis compactors(ADCMP609 and 74HC32)and a large capacitor,which has a function of the maximum power point tracking(MPPT).The circuit can boost the output voltage of MFC at the maximum power point,which improves the system energy conversion efficiency.The secondary booster circuit consists of an Ener Chip energy processor(CBC915),a charge pump(IC S882Z24),an Ener Chip solid state battery module(CBC51100).The secondary booster circuit can improve the voltage on the large capacitor connected with the output of the energy collection circuit and the working voltage of the wireless temperature sensor,and provide a stab

关 键 词：传感器 设计 农业信息化 微生物燃料电池 最大功率点跟踪 

分 类 号：TM343[电气工程—电机]