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| 用于声子晶体检测的外差测量信号处理研究 | |
| 引用本文： | 王连坤,李锋,吴一辉,赵晓飞,陈明刚.用于声子晶体检测的外差测量信号处理研究[J].压电与声光,2011,33(5). |
| 作者姓名： | 王连坤 李锋 吴一辉 赵晓飞 陈明刚 |
| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033;中国科学院研究生院,北京100039 2. 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春,130033 3. 长春轨道客车有限公司,吉林长春,130025 4. 徐工集团徐州重型机械有限公司,江苏徐州,221000 |
| 基金项目： | 国家自然科学基金资助项目(60871043) |
| 摘 要： | 为了满足声子晶体谐振频率测量要求,即测量出其振动形式且可连续测量,该文运用光外差测量技术测得光电信号,声子晶体激励采用压电激励方式.由于光电信号很微弱,故用自动增益控制电路对光电信号放大,然后运用锁相混频技术,解调出振动信息.本系统中自动增益控制电路,使系统对实验台倾斜等原因造成的连续测量时光电信号大幅变化带来的困难得以解决.该系统实现了对微弱振动的实时、灵敏度及信噪比均高的精确连续测量,对于声子晶体在线、连续检测具有重要意义. |
| 关 键 词： | 光外差测量 声子晶体 锁相混频 自动增益控制 |
Study on the Processing of the Heterodyne Interference Signal for Phononic Crystal Detections |
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| WANG Liankun,LI Feng,WU Yihui,ZHAO Xiaofei,CHEN Minggang.Study on the Processing of the Heterodyne Interference Signal for Phononic Crystal Detections[J].Piezoelectrics & Acoustooptics,2011,33(5). | |
| Authors: | WANG Liankun LI Feng WU Yihui ZHAO Xiaofei CHEN Minggang |
| Affiliation: | WANG Liankun1,2,LI Feng1,WU Yihui1,ZHAO Xiaofei3,CHEN Minggang4(1.The State Key Lab.of Applied Optics,Changchun Institude of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China,2.Postgraduate Institute of Chinese Academy of Sciences,Beijing 100039,3.Changchun Railway Vehicles Co.LTD,Changchun 130025,4.Xuzhou Heavy Machinery Co.LTD Xuzhou Construction Machine Group,Xuzhou 221000,China) |
| Abstract: | To satisfy the demands for the resonance frequency detection of the phononic crystal,that is to get the form of vibration of the phononic crystals(PCs),which include the amplitude and the phase information of the vibration continually,we use the optical heterodyne interference technique to detect the vibration so as to get the photocurrent which contains the information we need to process.The phononic crystal was excited by the piezoelectric excitation.As the photocurrent is weak,we use the auto-gain-contro... |
| Keywords: | optical heterodyne interference PCs PLL frequency-mixing AGC |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
