基于功率检波技术的声表面波标签识别方法  

The Identification Method of SAW Tag Based on Power Detection Technology

作　　者：钟悦芸 陈智军[1,2] 孙聪[1] 王昕辰 童锐[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016 [2]南京大学近代声学教育部重点实验室,江苏南京210093

出　　处：《压电与声光》2016年第1期55-59,68,共6页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51475240);航空科学基金资助项目(2014ZD52053);江苏高校优势学科建设工程基金资助项目

摘　　要：声表面波射频识别系统应用前景广阔,选择结构简单、解码可靠的声表面波标签识别方法十分重要。分析比较了基于IQ解调和功率检波两种不同技术的声表面波标签识别方法,基于功率检波技术的识别方法更具优势。设计制作了基于功率检波技术的阅读器,在测试了阅读器关键元件对数功率检波器静态性能和动态性能的基础上,结合声表面波标签进一步验证了阅读器识别标签编码的能力。实验结果表明,采用功率检波技术可以实现声表面波标签编码的准确识别,且阅读器电路结构更简单,成本更低。As SAW RFID system has broad application prospects,it is vital to select an effective and uncomplicated method to identify SAW tags accurately.Through analysis and comparison of two different identification methods of SAW tags which are based on IQ demodulation technology and power detection technology respectively,the power detection technology based identification method has more advantages.A SAW-tag reader based on power detection technology is designed and manufactured.The static and dynamic performances of the power detector,which is the key part of the reader,are tested.Furthermore,utilizing the SAW tag,the practicability of the reader for SAW tag identification is verified.The experimental results show that the power detection technology based method can identify SAW tag accurately,and has simpler reader circuit structure and lower cost.

关 键 词：功率检波 声表面波 射频识别 阅读器 

分 类 号：TN85[电子电信—信息与通信工程]