| 数字化ECT成像系统 |
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| 引用本文： | 马敏,王化祥,郝魁红. 数字化ECT成像系统[J]. 河南科学, 2009, 27(12): 1515-1519 |
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| 作者姓名： | 马敏 王化祥 郝魁红 |
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| 作者单位： | 1. 中国民航大学,航空自动化学院,天津,300300
2. 天津大学,电气与自动化学院,天津,300072 |
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| 基金项目： | 国家自然科学基金，Scientific Research Foundation of Civil Aviation University of China |
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| 摘 要： | 基于电容敏感原理设计的数字化电容层析成像系统，利用有限元法，分析了阵列电极结构对敏感场分布的影响，通过优化设计和仿真试验，改善了敏感场分布的均匀性；构建了以DSP为核心、FPGA协同工作的12电极的数字化ECT系统，提出了由离线预迭代和在线一步成像所构成的新的图像重建算法——预迭代法，其成像速度及精度均明显提高．
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| 关 键 词： | 电容层析成像 数字化 阵列电极 DSP FPGA 预迭代法 |
A Digitized Electrical Capacitance Tomography System |
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| Ma Min,Wang Huaxiang,Hao Kuihong. A Digitized Electrical Capacitance Tomography System[J]. Henan Science, 2009, 27(12): 1515-1519 |
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| Authors: | Ma Min Wang Huaxiang Hao Kuihong |
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| Affiliation: | Ma Min, Wang Huaxiang, Hao Kuihong (1. College of Aeronautical Automation, Civil Aviation University of China, Tianjin 300300, China; 2. School of Electrical and Automatic Engineering, Tianjin University, Tianjin 300072, China) |
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| Abstract: | This paper introduces the basic principle of electrical capacitance tomography(ECT)system,and analyzes the effects of the structure parameters of array electrodes on the sensitivity distribution using finite element method(FEM),and also makes optimum design.Using the Digital Signal Processing(DSP)and the Field Program Gate Array(FPGA)devices,a digital system of electrical capacitance tomography is designed.At the game time,a new reconstruction algorithm,namely pre-iteration method is presented which possesses the advantages of both the high data acquisition speed and the high image resolution |
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| Keywords: | DSP FPGA electrical capacitance tomography digital system array electrode DSP FPGA pre-iteration algorithm |
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