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[1]杨柳,殷晨波,朱斌,等.基于振荡检测法的延迟线型声表面波气体传感器特性[J].南京工业大学学报(自然科学版),2015,37(01):60-64.[doi:10.3969/j.issn.1671-7627.2015.01.011]
 YANG Liu,YIN Chenbo,ZHU Bin,et al.Characteristics of delay line type surface acoustic wave gas sensor based on oscillation[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(01):60-64.[doi:10.3969/j.issn.1671-7627.2015.01.011]
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基于振荡检测法的延迟线型声表面波气体传感器特性()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年01期
页码:
60-64
栏目:
出版日期:
2015-01-19

文章信息/Info

Title:
Characteristics of delay line type surface acoustic wave gas sensor based on oscillation
文章编号:
1671-7627(2015)01-0060-05
作者:
杨柳殷晨波朱斌张子立
南京工业大学 机械与动力工程学院,江苏 南京 211800
Author(s):
YANG Liu YIN Chenbo ZHU Bin ZHANG Zili
College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211800, China
关键词:
延迟线型SAW 简化模型 叉指电极 振荡电路
Keywords:
delay line type SAW simplified model inter-digital electrodes oscillation circuit
分类号:
TP212.1
DOI:
10.3969/j.issn.1671-7627.2015.01.011
文献标志码:
A
摘要:
研究延迟线型声表面波(SAW)气体传感器的信号传输损耗和相位变化,考察了振荡检测法中相移电路和滤波电路对传感器性能的影响。基于延迟线型SAW气体传感器简化数学模型和频率特性测试,探讨叉指电极(IDTs)对传感器性能和传输过程中信号相位幅值变化量的影响。利用不同阶低通滤波器的性质和相移电路频率特性曲线研究振荡电路对延迟线型SAW传感器振荡频率、灵敏度和稳定性的影响机制。结果表明:延迟线型SAW传感器插入损耗和信号带宽反比叉指对数; 传输过程中信号相位变化受振荡频率、波速和中心距共同影响; 滤波器幅频特性随滤波电路阶次降低而变好,同时传感器灵敏度提高。
Abstract:
The insertion loss and the variation phase of wave propagating in delay line type surface acoustic wave(SAW)gas sensors were investigated. The influence of phase-shift circuit and low-pass filter circuit on the performance of SAW gas sensor based on oscillation was considered. The simplified mathematical model and testing frequency characteristics of delay line type SAW gas sensors were used to study the influence of metal inter-digital transducers(IDTs)on the characteristics of gas sensor, the variation of wave phase and amplitude in propagation process. The influence mechanism of oscillation circuit on oscillation frequency, sensitivity and stability of SAW gas sensors was discussed, based on properties of low-pass filter and frequency characteristics of phase shift circuit. The insertion loss and the signal bandwidth were decreased with increasing the number of IDTs. The phase change was influenced by the oscillation frequency, the acoustic velocity and the distance between two centers of IDTs. The phase-frequency characteristics of low-pass filter were improved with decreasing the order of filters, and the sensitivity of delay SAW was increased with decreasing the order of filters.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-09-09
基金项目:国家自然科学基金(50875122); 江苏省普通高校研究生科研创新计划(CXZZ11_0340)
作者简介:杨柳(1988—),男,江苏宿迁人,博士生,主要研究方向为声表面波气体传感器; 殷晨波(联系人),教授,E-mail:yinchenbo@njtech.edu.cn.
引用本文:杨柳,殷晨波,朱斌,等.基于振荡检测法的延迟线型声表面波气体传感器特性[J].南京工业大学学报:自然科学版,2015,37(1):60-64..
更新日期/Last Update: 2015-01-20