| 声表面波传感器检测电路的研究 |
| |
| 引用本文： | 李永刚,李炜,朱嘉林.声表面波传感器检测电路的研究[J].微纳电子技术,2008,45(10). |
| |
| 作者姓名： | 李永刚 李炜 朱嘉林 |
| |
| 作者单位： | 北京信息工程学院,北京,100101 |
| |
| 基金项目： | 国家自然科学基金，北京市自然科学基金 |
| |
| 摘 要： | 针对目前声表面波(SAW)传感器检测电路的缺点,通过对SAW传感器信号的特征分析,设计了一种简单实用的SAW传感器检测电路,降低了硬件成本。该电路利用直接数字频率合成技术产生不同的频率信号,用以激励不同谐振频率的声表面波敏感元件,在间歇收发周期从SAW传感器输出信号中提取出反映被测量的频率信号,通过对该频率的测量得到被测物理量的变化。通过对SAW传感器的温度实验,获得了传感器的温度-频率特性,在较低频率(20MHz)时检测灵敏度可达1.36kHz/℃,具有较好的一致性;在较高频率(75MHz)时检测灵敏度可达2.03kHz/℃,存在一定偏差。
|
| 关 键 词： | 声表面波 传感器 直接数字频率合成 测试电路 延迟线 |
Research of the Surface Acoustic Wave Sensor Test Circuit |
| |
| Li Yonggang,Li Wei,Zhu Jialin.Research of the Surface Acoustic Wave Sensor Test Circuit[J].Micronanoelectronic Technology,2008,45(10). |
| |
| Authors: | Li Yonggang Li Wei Zhu Jialin |
| |
| Institution: | Li Yonggang,Li Wei,Zhu Jialin(Beijing Information Technology Institute,Beijng 100101,China) |
| |
| Abstract: | Aiming at the shortcoming of the present SAW sensor testing circuits,a simple and practical SAW sensor test circuit which saves hardware cost was designed by analyzing the features of the SAW sensor signals.In this circuit,the different frequency signals were produced by direct digital synthesis technology,and were applied to excite SAW sensors with different resonance frequencies.At the intermittent cycle,the frequency signal which reflects the measurement was extracted from the output signal of SAW sensor... |
| |
| Keywords: | SAW(surface acoustic wave) sensor direct digital synthesis test circuit delay line |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
