[1]林天衣,李武森,陈文建,等.基于ADA2200的开关电容微位移传感器信号处理电路研究[J].南京理工大学学报(自然科学版),2018,42(06):693.[doi:10.14177/j.cnki.32-1397n.2018.42.06.009]
 Lin Tianyi,Li Wusen,Chen Wenjian,et al.Signal processing circuit based on ADA2200 in switch-capacitancemicro-displacement sensor[J].Journal of Nanjing University of Science and Technology,2018,42(06):693.[doi:10.14177/j.cnki.32-1397n.2018.42.06.009]
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基于ADA2200的开关电容微位移传感器信号处理电路研究()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
42卷
期数:
2018年06期
页码:
693
栏目:
出版日期:
2018-12-30

文章信息/Info

Title:
Signal processing circuit based on ADA2200 in switch-capacitancemicro-displacement sensor
文章编号:
1005-9830(2018)06-0693-07
作者:
林天衣1李武森1陈文建1戚永军2郑 南1肖 悦1
1.南京理工大学 电子工程与光电技术学院,江苏 南京 210094; 2.中国科学院国家天文台 南京天文光学技术研究所,江苏 南京 210042
Author(s):
Lin Tianyi1Li Wusen1Chen Wenjian1Qi Yongjun2Zheng Nan1Xiao Yue1
1.School of Electronic and Optical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China; 2. National Astronomical Observatories,Nanjing Institute of AstronomicalOptical Technology,Nanjing 210042,China
关键词:
主动光学 开关电容 微位移传感器 天文望远镜 电容检测 同步解调 采样模拟技术
Keywords:
active optics switched capacitances micro-displacement sensors astronomical telescopes capacitance detection synchronous demodulation sampling analog technology
分类号:
TP212.1
DOI:
10.14177/j.cnki.32-1397n.2018.42.06.009
摘要:
为实现天文望远镜子镜之间微小位移的精密测量,采用信号处理电路去除噪声影响。采用基于开关电容技术的驱动与检测器和以ADA2200为中心的位移信号解调方法,设计了主要电路模块。电容检测模块包含了开关电容驱动和电容/电压(C/V)转换电路。同步解调模块使用了ADA2200芯片,基于采样模拟技术(SAT)对信号进行同步正交解调。实验结果表明,该文方案可以实现电容极板之间相对微小位移的检测,ADA2200芯片对包含静态位移信息的调幅波的解调精度优于2.5%,对动态变化的位移参数也能够实现实时解调。
Abstract:
The signal processing circuit of a micro-displacement sensor is researched to get rid of the noise and realize the precise measurement of the micro-displacement between two segments of an astronomical telescope. Main circuit modules are designed using a detector with drive based on switched capacitors and the displacement signal demodulation method based on ADA2200. The capacitance detection module combines the switched capacitance technology and a capacitance/voltage converter. The synchronous demodulation module adopts ADA2200 chip to realize synchronous orthogonal demodulation of signals based on sampling analog technology(SAT). Experimental results show that the micro-displacement between the capacitors’plates can be detected,the demodulation based on ADA2200 chip can realize precision better than 2.5%,and the dynamics displacement can be demodulated in real time.

参考文献/References:

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相似文献/References:

[1]刘保安.开关电容电路的分析方法[J].南京理工大学学报(自然科学版),1995,(04):340.
 LiuBaoan.An Analysis Method of Switched Capacitor Circuits[J].Journal of Nanjing University of Science and Technology,1995,(06):340.

备注/Memo

备注/Memo:
收稿日期:2017-07-03 修回日期:2018-09-17
基金项目:国家自然科学基金(U1531138)
作者简介:林天衣(1993-),女,硕士生,主要研究方向:光电信号处理,E-mail:1379197045@qq.com; 通讯作者:李武森(1968-),男,博士,副教授,主要研究方向:光电信号处理,E-mail:liwusen@njust.edu.cn。
引文格式:林天衣,李武森,陈文建,等. 基于ADA2200的开关电容微位移传感器信号处理电路研究[J]. 南京理工大学学报,2018,42(6):693-699.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2018-12-30