LIU Xiao, WANG Xiaoxin, HU Hongli, et al. Improved Offline Iteration and Online Reconstruction Algorithm in Electrical Capacitance Tomography Imaging Technology[J]. 2014, 48(4): 35-40.
DOI:
LIU Xiao, WANG Xiaoxin, HU Hongli, et al. Improved Offline Iteration and Online Reconstruction Algorithm in Electrical Capacitance Tomography Imaging Technology[J]. 2014, 48(4): 35-40.DOI: 10.7652/xjtuxb201404007.
Improved Offline Iteration and Online Reconstruction Algorithm in Electrical Capacitance Tomography Imaging Technology
In inverse problem of electrical capacitance tomography(ECT)
the image reconstruction precision contradicts the rate. For a 12-electrode ECT system
improved offline iteration online reconstruction(OIOR)is put forward to meet the requirement of image reconstruction. Iterative filtering process joins the existing OIOR to improve the imaging precision and to simultaneously ensure the reconstruction rate. The simulated and measured capacitances are evaluated and analyzed for imaging results
relative error
correlation coefficient and the reconstruction period. The simulation and experiments show that the improved OIOR method is able to improve the precision of reconstructed image and reduce the relative error by 20% via 100 recursive filterings within 20 ms. The reconstruction period can be reduced to 10% of the traditional iterative method under the same image precision requirement.
关键词
Keywords
references
HUANG S M, PLASKOWSKI A B, XIE C G, et al. Capacitance-based tomographic flow imaging system[J]. Electrics Letters, 1988, 22(7): 173-177
HU Hongli, ZHANG Juan, DONG Jun, et al. Identification of gas-solid two-phase flow regimes using Hilbert-Huang transform and neural-network techniques[J]. Instrumentation Science and Technology, 2011, 39(2): 198-210
CHEN Xia, HU Hongli, ZHANG Juan, et al. An ECT system based on improved RBF network and adaptive wavelet image enhancement for solid/gas two-phase flow[J]. Chinese Journal of Chemical Engineering, 2012, 20(2): 359-367[4] DICLIN F J, BECK M S. Tomographic imaging of industrial process equipment: techniques and applications[J]. IEE Proceeding: G, 1992, 139(1): 72-82[5] WANG Hongmei, HU Hongli, WANG Lijuan, et al. Image reconstruction for an electrical capacitance tomography(ECT)system based on a least squares support vector machine and bacterial colony chemotaxis algorithm[J]. Flow Measurement and Instrumentation, 2012, 27(5): 59-66
YANG W Q. Modeling of capacitance tomography sensors[J]. IEE Proc Sci Meas Technol, 1997, 144: 203-220
QU Gangrong, WANG Caifang, JIANG Min. Necessary and sufficient convergence conditions for algebraic image reconstruction algorithms: research announcement[J]. Advances in Mathematics, 2007, 36(3): 379-381
LI Liangchao, YANG Jianyu, CUI Guolong. Super-resolution processing of passive millimeter-wave images based on conjugate-gradient algorithm[J]. Journal of Systems Engineering and Electronics, 2009, 20(4): 762-767
YI Jianqiang, WANG Qian, ZHAO Dongbin, et al. BP neural network prediction-based variable-period sampling approach for networked[J]. Control Systems, 2007, 185(2): 976-988
WANG Huaxiang, WANG Chao, YIN Wuliang. A pre-iteration method for the inverse problem in electrical impedance tomography[J]. IEEE Trans on Instrumentation and Measurement, 2004, 53(4): 1093-1096
YANG Wuqiang, PENG Lihui. Image reconstruction algorithms for electrical capacitance tomography[J]. Measurement Science and Technology, 2003, 14(1): 1-13
LIU Shi, YANG Wuqiang. Prior-online iteration for image reconstruction with electrical capacitance tomography[J]. IEE Proc-Sci Meas Technol, 2004, 151(3): 195-200
YANG W Q, SPINK D M, YORK T A. An image-reconstruction algorithm based on Landweber's iteration method for electrical capacitance tomography[J]. Meas Sci Technol, 1999, 10: 1065-1069
WANG Xiaoxin, YAN Jiebing, HU Hongli, et al. An ECT flow regime identification technology for gas/solid two-phase flow phase concentration measurement[C]∥Proceedings of the Second International Conference on Instrumentation & Measurement, Computer, Communication and Control. Piscataway, USA: IEEE, 2012: 1318-1321
颜华. 电容层析成像系统中微小电容测量法[J]. 仪表技术与传感器, 1998, 4(2): 15-19.YAN Hua. The measurement of low value capacitance in electrical capacitance tomography system[J]. Instrument Technique and Sensor, 1998, 4(2): 15-19
陈夏, 胡红利, 高享想, 等. 代数重建和同步迭代重建在电容层析成像中的比较研究[J]. 西安交通大学学报, 2011, 45(4): 25-29.CHEN Xia, HU Hongli, GAO Xiangxiang, et al. Comparison of algebraic reconstruction technique and simultaneous iterative reconstruction technique in electrical capacitance tomography image reconstruction[J]. Journal of Xi'an Jiaotong University, 2011, 45(4): 25-29
HU Hongli, XU Tongmo. A novel capacitive system for the concentration measurement of pneumatically conveyed pulverized fuel at power stations[J]. Flow Measurement and Instrumentation, 2006, 17: 87-92
HAO Jianna, YIN Wuliang, ZHAO Qian, et al. Preconditioning of projected SIRT algorithm for electromagnetic tomography[J]. Flow Measurement and Instrumentation, 2013, 29: 39-44.