| 12电极ECT测量电路设计 |
| |
| 引用本文： | 苏祥芳,潘敏,卢振陶,黄乐新,王延平.12电极ECT测量电路设计[J].武汉大学学报(理学版),1997(5). |
| |
| 作者姓名： | 苏祥芳 潘敏 卢振陶 黄乐新 王延平 |
| |
| 作者单位： | 武汉大学电子信息学学院 |
| |
| 摘 要： | 介绍了１２电极ＥＣＴ成像系统测量的原理及设计．研制了一种高频抗杂散电容的充电转换差分放大探测电路，并设计出与１２电极相配合、数据稳定、高分辨的一套控制时序，较好的实现了低漂移、高灵敏度及低噪声的测量．该测量电路可应用于最大成像率为１００帧／ｓ的系统
|
| 关 键 词： | ECT，电容测量电路，充电注入效应，低噪声，数据捕获率 |
DESIGN OF SENSOR ELECTRONICS FOR A 12 ELECTRODE ECT SYSTEM |
| |
| Su Xiangfang,Pan Min,Lu Zhentao,Huang Lexin,Wang Yanping.DESIGN OF SENSOR ELECTRONICS FOR A 12 ELECTRODE ECT SYSTEM[J].JOurnal of Wuhan University:Natural Science Edition,1997(5). |
| |
| Authors: | Su Xiangfang Pan Min Lu Zhentao Huang Lexin Wang Yanping |
| |
| Abstract: | The principle and design of the sensor electronics for a tomographic imaging system for a electrical capacitance sensor of 12 electrode system is descriped,and the current detector and the parallel measurement channels are emphasized.The performance of the sensor electronics is crucial to the performance of the imaging system.The problems associated with such a measurement process are discussed and solutions are descriped.Test results show that the present design has a resolution of 0.01 pF,a large dynamic range of 76 dB and a data acquisition speed of 6 600 measurements per second.This enables sensors with up to 12 electrods to be used in a system with maximum imaging rate of 100 frames per second. |
| |
| Keywords: | ECT capacitance charge injection effect low noise level data capture rate |
| 本文献已被 CNKI 等数据库收录！ |
