摘要
传统湿度传感器制造工艺复杂、需有线连接信号,对此,文中提出一种纸基无芯片射频识别(Radio Frequency Identification,RFID)湿度传感器。为提升传感器谐振特性,选择非对称开口环内部分布式加载金属碎片作为传感器结构,聚乙烯醇(PVA)作为湿敏材料,使用遗传算法和HFSS射频仿真软件来设计并优化传感器结构。以喷墨打印技术制作传感器样品,采用滴涂法在传感器表面分别制备了5%、10%、15%三种质量浓度比的PVA薄膜。湿敏特性仿真及测试结果一致表明:PVA与纸基底协同作用可显著提高传感器灵敏度。随PVA浓度增加灵敏度增加,15%PVA传感器灵敏度最高,高湿灵敏度达到12.22 MHz/%RH,但随PVA浓度增加恢复特性变差,5%PVA湿度传感器具有良好的恢复特性,恢复度达83.87%。通过长期多次实验验证了PVA纸基湿度传感器具有良好的温度稳定性与中长期稳定性。与同类研究成果对比,文中设计在感湿范围及灵敏度方面有优势且制造工艺更简单,为低成本湿度传感器的大规模使用提供了可能。
In order to solve the problems of the traditional humidity sensor,such as the complex manufacturing process and the need for wired connection signal,this paper proposes a chipless RFID humidity sensor based on paper substrate.In order to improve the resonant characteristics of the paper based resonator,the distributed metal fragments loaded inside the asymmetric open ring are selected as the sensor structure,and the polyvinyl alcohol(PVA)is used as the humidity sensitive material.The structure of the sensor is optimized by genetic algorithm and HFSS software RF simulation.The sensor samples are prepared by inkjet printing technology,and PVA films with concentration ratios of 5%,10%and 15%are prepared on the sensor surface by droplet coating method.The results of simulation and test show that the synergistic effect of PVA and paper base can obviously improve the sensitivity of the sensor.With the increase of PVA concentration,the sensitivity of the 15%PVA humidity sensor can reach 12.22 MHz/%RH,but with the increase of PVA concentration,the recovery performance of the 5%PVA humidity sensor is poor,and the recovery performance of the 5%PVA humidity sensor can reach 83.87%.The PVA paper based humidity sensor has good temperature stability and medium and long term stability.Compared with similar research results,the PVA paper based humidity sensor developed in this paper has advantages in terms of humidity sensing range and sensitivity,and the manufacturing process is simpler,which provides the possibility of large-scale use of low-cost humidity sensor.
作者
夏雨人
薛严冰
冯冲
陈宝君
鞠艳杰
XIA Yu-ren;XUE Yan-bing;FENG Chong;CHEN Bao-jun;JU Yan-jie(College of Electrical and Information Engineering,Dalian Jiaotong University,Dalian 116028,China;College of Information and Communication Engineering,Dalian Minzu University,Dalian 116600,China)
出处
《微波学报》
CSCD
北大核心
2022年第4期82-87,共6页
Journal of Microwaves
基金
辽宁省教育厅科学研究项目(JDL2019008)
辽宁省自然科学基金(2019ZD0107)。
关键词
无芯片射频识别湿度传感器
纸基底
湿敏特性
聚乙烯醇薄膜
chipless radio frequency identification(RFID)humidity sensor
paper substrate
humidity sensitivity
polyvinyl alcohol(PVA)film
