基于矩形贴片天线的应变测量技术
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摘要
为了研究基于矩形贴片天线的应变测量技术,根据传输线模型,分析了矩形贴片天线与应变间的作用机理,明确了天线辐射单元尺寸受应变影响,可导致贴片天线中心频率发生偏移,且获得了频率偏移量与应变间的线性关系理论表达式.设计3种不同中心频率的矩形贴片天线,利用高频结构模拟器(high frequency structure simulator,HFSS)电磁仿真软件和拉伸应变检测系统,对不同应变状态下,贴片天线中心频率随应变的变化趋势进行了仿真与实验测试.仿真和实验结果表明:贴片天线的中心频率的偏移量与应变之间线性关系明显,且贴片天线的中心频率越高,应变灵敏度越大.利用矩形贴片天线作为应变传感器,可满足结构应变测量要求,为结构健康无线监测研究奠定了基础.
To study the strain measurement technique based on the rectangular patch antenna,according to the transmission line model,the interaction mechanism between rectangular patch antenna and strain was analyzed. The effect of strain on the dimensional size of the radiating area of the patch antenna can shift the central frequency of the antenna. The linear relationship between frequency shift and the strain was also obtained. Three types of rectangular patch antennas with different center frequencies were designed. Simulation and experiments were carried out to extract the variation of the central frequency versus structural strain,using high frequency structure simulator( HFSS) and tensile strain testing system on different strain states. According to the simulation and experimental results,the relationship between the shift of the center frequency of the patch antenna and the strain is obviously linear. The higher the center frequency of the patch antenna is,the greater the strain sensitivity is obtained. This shows that the rectangular patch antenna, as a strain sensor, can meet the requirements of structural strain measurement,which lays a foundation for the wireless structural health monitoring.
To study the strain measurement technique based on the rectangular patch antenna,according to the transmission line model,the interaction mechanism between rectangular patch antenna and strain was analyzed. The effect of strain on the dimensional size of the radiating area of the patch antenna can shift the central frequency of the antenna. The linear relationship between frequency shift and the strain was also obtained. Three types of rectangular patch antennas with different center frequencies were designed. Simulation and experiments were carried out to extract the variation of the central frequency versus structural strain,using high frequency structure simulator( HFSS) and tensile strain testing system on different strain states. According to the simulation and experimental results,the relationship between the shift of the center frequency of the patch antenna and the strain is obviously linear. The higher the center frequency of the patch antenna is,the greater the strain sensitivity is obtained. This shows that the rectangular patch antenna, as a strain sensor, can meet the requirements of structural strain measurement,which lays a foundation for the wireless structural health monitoring.
引文
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[15]李明洋. HFSS电磁仿真设计应用详解[M].北京:人民邮电出版社,2010:81-159.
[16] TATA U S. Study of patch antennas for strain measurement[D]. Arlington:The University of Texas at Arlington,2008.
[2]左芳君.机械结构的疲劳寿命预测与可靠性方法研究[D].成都:电子科技大学,2016.ZUO F J. Research on methods for reliability analysis and fatigue life prediction for mechanical structure[D].Chengdu:University of Electronic Science and Technology of China,2016.(in Chinese)
[3]范哲,冯新,周晶.基于分布式应变监测的大跨度斜拉桥结构损伤探测[J].防灾减灾工程学报,2014,34(1):46-50.FAN Z,FENG X,ZHOU J. Damage detection of longspan cable-stayed bridge based on the distributed strain monitoring[J]. Journal of Disaster Prevention and Mitigation Engineering, 2014, 34(1):46-50.(in Chinese)
[4] LYNCH J P. A summary review of wireless sensors and sensor networks for structural health monitoring[J]. Shock&Vibration Digest,2006,38(2):91-128.
[5]葛航宇,李浩,陈跃良,等.一种基于微带天线的应变测量技术[J].中国科学:技术科学,2014,44(9):973-978.GE H Y,LI H,CHEN Y L,et al. A strain measurement method based on microstrip patch antennas[J]. Scientia Sinica Technological, 2014, 44(9):973-978.(in Chinese)
[6] SEMKIN V,BISOGNIN A,KYROM,et al. Conformal antenna array for millimeter-wave communications:performance evaluation[J]. International Journal of Microwave and Wireless Technologies,2017,9(1):241-247.
[7] CHEN S C, SZE J Y, CHUANG K J. Isolation enhancement of small-size WLAN MIMO antenna array for laptop computer application[J]. Journal of Electromagnetic Waves and Applications,2017,31(3):323-334.
[8] TATA U,HUANG H,CARTER R L,et al. Exploiting a patch antenna for strain measurements[J]. Measurement Science and Technology,2008,20(1):015201.
[9] XU X,HUANG H. Battery-less wireless interrogation of microstrip patch antenna for strain sensing[J]. Smart Materials&Structures,2012,21(12):1-9.
[10] DALIRI A,GALEHDAR A,JOHN S,et al. Circular microstrip patch antenna strain sensor for wireless structural health monitoring[J]. Lecture Notes in Egineering&Computer Science,2010,2184(1):1-12.
[11] DALIRI A,GALEHDAR A,JOHN S,et al. Wireless strain measurement using circular microstrip patch antennas[J]. Sensors&Actuators A Physical,2012,184(3):86-92.
[12] ALI D,AMIR G,ROWE W S T,et al. Quality factor effect on the wireless range of microstrip patch antenna strain sensors[J]. Sensors,2014,14(1):595-605.
[13] RUFUS E. Microstrip antenna on kapton substrate for strain sensing applications[C]∥International Conference on Advanced Communication Technology. New York:IEEE,2014:453-455.
[14]张钧.微带天线理论与工程[M].北京:国防工业出版社,1988:39-48.
[15]李明洋. HFSS电磁仿真设计应用详解[M].北京:人民邮电出版社,2010:81-159.
[16] TATA U S. Study of patch antennas for strain measurement[D]. Arlington:The University of Texas at Arlington,2008.