反射率补偿型声表面波标签的温度测量  

Temperature measurement of reflectance compensated SAW tag

作　　者：蒋玲[1] 陈智军[1] 高智翔[1] 徐海林[2] 童锐[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]中国电子科技集团第55研究所,南京210016

出　　处：《仪器仪表学报》2014年第10期2372-2377,共6页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51475240);江苏省科技支撑计划工业(BE2011180);航空科学基金(2014ZD52053);江苏高校优势学科建设工程资助项目

摘　　要：声表面波器件卓越的性能,极其适于集识别与传感一体的应用。研究了反射率补偿型声表面波标签的温度测量可行性：分析并消除了反射栅结构差异对相位延迟的影响;提出相位比例尺递推的思想,在保证测温精度同时,极大拓展了测温范围;反射栅间相位延迟的线性拟合,减少了噪声相位对测温的影响;提出斜率温度系数的概念,理论推导表明此参数与反射栅位置、结构无关,简化了测温标签的标定工作量。实验验证了反射率补偿型声表面波标签测温的有效性,并在30~130℃内获得了±0.3℃的测温精度。The excellent performance of SAW makes it extremely suitable for integrated identification and sensing applications. The fea- sibility of temperature measurement of reflectivity compensated SAW tag is studied： the effect of the structure difference between reflec- tion grids on phase delay is analyzed and eliminated; the idea of recursive phase scale is put forward, which expands the temperature measurement range while ensuring the temperature measurement accuracy; the linear fitting of the phase delay between reflection grids decreases the effect of noise phase on temperature measurement. The concept of the slope of the temperature coefficient is proposed, and theoretical analysis shows that this parameter is independent of the position and structure of reflection grid, which simplifies the calibra- tion workload of temperature label. Experiments verify the validity of the temperature measurement of SAW RFID system, and the tem- perature measurement accuracy of ± 0.3℃ is achieved within 30 - 110℃.

关 键 词：反射率补偿 声表面波标签 温度测量 斜率温度系数 相位比例尺递推 

分 类 号：TH7[机械工程—仪器科学与技术]