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基于无芯片RFID的低成本湿度传感器设计

王博 李有为 王柯

王博,李有为,王柯. 基于无芯片RFID的低成本湿度传感器设计[J]. 北京航空航天大学学报,2024,50(3):1047-1052 doi: 10.13700/j.bh.1001-5965.2023.0161
引用本文: 王博,李有为,王柯. 基于无芯片RFID的低成本湿度传感器设计[J]. 北京航空航天大学学报,2024,50(3):1047-1052 doi: 10.13700/j.bh.1001-5965.2023.0161
WANG B,LI Y W,WANG K. Design of a low cost chipless RFID humidity sensor[J]. Journal of Beijing University of Aeronautics and Astronautics,2024,50(3):1047-1052 (in Chinese) doi: 10.13700/j.bh.1001-5965.2023.0161
Citation: WANG B,LI Y W,WANG K. Design of a low cost chipless RFID humidity sensor[J]. Journal of Beijing University of Aeronautics and Astronautics,2024,50(3):1047-1052 (in Chinese) doi: 10.13700/j.bh.1001-5965.2023.0161

基于无芯片RFID的低成本湿度传感器设计

doi: 10.13700/j.bh.1001-5965.2023.0161
基金项目: 国家自然科学基金青年科学基金(12204373);陕西省教育厅专项科研计划(17JK0691)
详细信息
    通讯作者:

    E-mail:wangbo_chen@126.com

  • 中图分类号: TN98

Design of a low cost chipless RFID humidity sensor

Funds: Youth Science Foundation of the National Natural Science Foundation of China (12204373); Scientific Research Program by Education Department of Shaanxi Provincial Government (17JK0691)
More Information
  • 摘要:

    设计一款低成本无芯片射频识别(RFID)传感器用于环境湿度监测具有重要意义。为此,将聚乙烯醇(PVA)薄膜用作湿度敏感材料,矩形基板的整体尺寸为18 mm×18 mm×0.5 mm,通过感湿原理和仿真分析,环境湿度的变化引起湿度敏感材料PVA介电常数的变化,进而影响整个传感器谐振频率偏移。仿真结果表明:所设计的湿度传感器相对湿度工作范围为21.9%~52.5%,对应传感器谐振频率范围为2.76~2.51 GHz,偏移总量达到250 MHz,最大相对湿度下平均灵敏度为23.08 MHz/%。所设计的湿度传感器具有小型化、结构简易和低成本等优点,可应用于各种目标环境的湿度监测。

     

  • 图 1  湿度传感器工作原理

    Figure 1.  Working principle of humidity sensor

    图 2  湿度传感器结构剖面图

    Figure 2.  Sectional view of humidity sensor structure

    图 3  湿度传感器侧视图

    Figure 3.  Side view of humidity sensor

    图 4  圆环形谐振器电流分布

    Figure 4.  Current distribution of circular ring resonator

    图 5  湿度传感器仿真模型

    Figure 5.  Simulation model of humidity sensor

    图 6  不同介电常数下传感器谐振频率变化

    Figure 6.  Variation of sensor resonant frequency under different dielectric constants

    图 7  介电常数与谐振频率、相对湿度关系

    Figure 7.  Relationship between dielectric constant and resonant frequency, relative humidity

    图 8  相对湿度与谐振频率变化关系

    Figure 8.  Relation between relative humidity and resonant frequency

    表  1  PVA在不同相对湿度中介电常数变化

    Table  1.   Electrical constant of PVA varies with different relative humidities

    相对湿度/% 介电常数
    2 GHz 3 GHz
    21.9 5.06 5.12
    29.1 5.08 5.14
    35.6 5.18 5.21
    44.7 5.38 5.41
    52.5 6.2 6.18
    64 7.7 7.5
    69.5 8.6 8.4
    80.4 15 14
    90.9 29 27
    94 41 38
    下载: 导出CSV

    表  2  相对湿度为21.9%~52.5%时平均灵敏度$\eta $

    Table  2.   Average sensitivity at 21.9%−52.5% relative humidity

    相对湿度/% $\eta $/(MHz·%−1)
    21.9
    29.1 1.389
    35.6 3.077
    44.7 4.396
    52.5 23.08
    下载: 导出CSV

    表  3  不同湿度传感器参数对比

    Table  3.   Comparison of parameters of different humidity sensors

    传感器 基板材料 敏感材料 面积/cm2 $\eta $/(MHz·%−1) 相对湿度/%
    文献[4] FR4 硅纳
    米线
    16 3.58 30~90
    文献[5] Taconic TLX-0 聚酰
    亚胺
    3.52 2.14 30~100
    文献[6] FR4 PVA 7.55 33~85
    本文 Rogers RO4003 PVA 3.24 8.17 21.9~52.5
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-04-04
  • 录用日期:  2023-09-23
  • 网络出版日期:  2023-10-13
  • 整期出版日期:  2024-03-27

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