| 静电传感器空间滤波效应及频率响应特性 |
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| 引用本文： | 许传龙,赵延军,杨道业,汤光华,周宾,王式民.静电传感器空间滤波效应及频率响应特性[J].东南大学学报(自然科学版),2006,36(4):556-561. |
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| 作者姓名： | 许传龙 赵延军 杨道业 汤光华 周宾 王式民 |
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| 作者单位： | 1. 东南大学洁净煤发电与燃烧技术教育部重点实验室,南京,210096
2. 河北理工大学计算机与控制学院,唐山,063009 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，高等学校博士学科点专项科研项目 |
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| 摘 要： | 介绍了静电传感器空间率波的基本原理,分析了静电传感器空间率波特性,在此基础上推导了传感器的频率响应特性.并在重力输送颗粒流装置上对静电传感器测量系统的动态特性进行了实验研究.理论和试验结果表明:静电传感器在空间频域上充当低通滤波器,而且径向位置越小,空间频带越窄;电极轴向长度越小,空间频带越宽;在时间频域内测量系统相当于带通滤波器,电极的轴向长度和颗粒径向位置对频带宽度的影响与空域频率特性相似;此外,颗粒速度越大,时域频带越宽,颗粒尺寸越大,频带越窄.
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| 关 键 词： | 频率响应 空间滤波效应 静电传感器 气固两相流 颗粒静电化 |
| 文章编号： | 1001-0505（2006）04-0556-06 |
| 收稿时间： | 12 8 2005 12:00AM |
| 修稿时间： | 2005-12-08 |
Spatial filtering effect and frequency response characteristics of electrodynamic sensor |
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| Xu Chuanlong,Zhao Yanjun,Yang Daoye,Tang Guanghua,Zhou Bin,Wang Shimin.Spatial filtering effect and frequency response characteristics of electrodynamic sensor[J].Journal of Southeast University(Natural Science Edition),2006,36(4):556-561. |
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| Authors: | Xu Chuanlong Zhao Yanjun Yang Daoye Tang Guanghua Zhou Bin Wang Shimin |
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| Institution: | 1. Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096, China;2. College of Computer and Automatic Control, Hebei Polytechnic University, Tangshan 063009, China |
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| Abstract: | The spatial filtering fundamental theory of electrodynamic sensor is introduced and its spatial filtering property is also analyzed quantitatively in the paper.Further,the temporal frequency response characteristics of electrodynamic sensor are derived and the experimental test results on a gravity-fed conveyor are presented.Theoretical and experimental results obtained demonstrate that electrodynamic sensor acts as a low-pass filter in the spatial frequency domain and the spatial frequency bandwidth broadens with the increase of radial coordinate and the decrease of the axial length of the electrode.The measurement system including electrodynamic sensor and its signal electronics acts as a band pass filter in the temporal frequency domain.The effects of radial position and the axial length of the electrode on the temporal frequency bandwidth are similar to the spatial frequency domain.In addition higher particle velocity and smaller particle size result in a wider temporal frequency bandwidth. |
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| Keywords: | frequency response characteristics spatial filtering effect electrodynamic sensor gas-solid two-phase flows particle electrification |
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