用于聚合物粉末微量水分测定的微波谐振腔体设计与测试  

Design and Measurement of Microwave Resonant Cavity for Trace Moisture Determination of Polymer Powder

作　　者：伍国柱 胡玉荣 乔晓婷 黄辉 王俊雄 宋振飞 WU Guozhu;HU Yurong;QIAO Xiaoting;HUANG Hui;WANG Junxiong;SONG Zhenfei(Shenzhen Institute for Technology Innovation(SITI),NIM,Shenzhen Guangdong 518000,China;Xinchen Technologies Co.,Ltd.,Beijing 100000,China)

机构地区：[1]深圳中国计量科学研究院技术创新研究院,广东深圳518000 [2]北京芯宸科技有限公司,北京100000

出　　处：《传感技术学报》2024年第5期913-915,共3页Chinese Journal of Sensors and Actuators

基　　金：国家重点研发计划(2021YFF0603704)。

摘　　要：主要研究了用于聚合物材料含水率测量的同轴谐振腔设计与测试,加工完成的谐振腔空腔谐振频率为3.38 GHz,负载Q值为3328。选取了0.06%和0.24%两种含水率聚四氟乙烯粉末,通过分析粉末体积占比与混合介电常数和负载Q值的关系来验证谐振腔对于微量含水率粉末的分辨力,测试结果显示了设计的谐振腔能够有效用于微量含水率范围内的粉末含水率分辨,并且有潜力通过负载Q值进行含水率精密测量。The design and measurement of the coaxial resonator used for measuring the moisture content of polymer materials is studied.The resonant frequency of the processed empty resonator cavity is 3.38 GHz,and the loaded Q value is 3328.Two kinds of polytetrafluoroethylene powders with moisture content of 0.06%and 0.24%are selected,and the relationships between the powder volume ratio and the mixed dielectric constant and loaded Q value is analyzed to verify the resolution of the resonant cavity for trace moisture content powders.The measurement results show that the designed resonant cavity can be effectively used for the resolution of powder moisture content in the range of trace moisture content,and has the potential to carry out precise measurement of moisture content according to loaded Q value.

关 键 词：微波测量 同轴谐振腔 粉末含水率 介电常数 品质因素 粉末体积占比 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]