ZHENG Tian-xiang, LI Lu, CHEN Shuo. Research on frequency grading scanning method for surface acoustic wave temperature sensor[J]. 2016, 35(5): 28-31. DOI: 10.13873/J.1000-9787(2016)05-0028-04.
声表面波温度传感器频率分级扫描方法研究
摘要
针对声表面波(SAW)谐振腔体的频率响应单侧单调特征
为提高传感器的温度响应速度
提出了一种频率分级扫描方法
将频率扫描分为粗扫频和精扫频两个阶段
以不同的扫频步长依次进行。利用粗扫频确定中心谐振频率所处的频率区间
再在该频率区间内利用精扫频得到腔体中心谐振频率
可将温度传感器扫频时间降为原来的1/7。利用提出的频率扫描方法开展实验研究
分别研究了单个传感器的温度量测不确定度和多个传感器的温度量测一致性
并分析了实验结果。
Abstract
Frequency responses of surface acoustic wave( SAW) resonators are monotonous in single side around resonant frequency
a grading scanning method is proposed to enhance response speed of SAW sensor for temperature sensing. The scanning method contains two frequency scanning levels
named as the coarse-level and the fine-level. With the method
scanning time of the SAW sensor for temperature is reduced to 1 /7. The experiments are performed to testify the effectiveness of the method. The uncertainty with a single SAW sensor and the inconsistency of multi-SAW sensors on temperature measurement are extracted by the experiments
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