Application of Electrical Impedance Tomography on Water Seepage Nondestructive Testing of Cementitious Material
-
摘要: 为探索对水泥基材料渗水状态的无损检测新方法，采用动态电阻抗成像技术（Electrical Impedance Tomography， EIT）对渗水的水泥圆盘试件进行了断层图像重建。通过搭建16电极EIT系统，基于注入电流采集电压的方式，用相邻电极激励测量方法获得成像数据，运用基于等位线反投影方法的电阻抗成像技术进行图像重构，并对比分析了EIT方法与红外热成像法的优缺点。结果表明：动态EIT方法可以对水泥圆盘的渗水状况进行可视化处理，能定位渗水区域范围：相对红外热成像法，动态EIT方法不仅能检测材料表面渗水状况，还能对不利于目测观察的内部渗水进行检测。该研究可为水泥结构物渗水的原位无损检测提供新的思路和参考。Abstract: This paper presents a novel method, the dynamic electrical impedance tomography (EIT), for water seepage nondestructive testing in a cementitious cylinder. In this work, an EIT measurement system including 16 electrodes was designed to implement adjacent stimulation pattern with current injection and voltage acquisition mode. The Equipotential Back-Projection Method was used to process the original data, and then to image the water seepage situation of the specimen. In order to get the advantages and disadvantages of EIT technology, infrared thermography technology has been investigated and compared. The results show the capabilities of EIT technology for water seepage detection in cementitious material/structures. Moreover, EIT can detect water seepage on the material surface, and image the internal seepage which is not suitable for direct observation. This study is beneficial to the development of nondestructive water seepage testing for cementitious material/structures.
-
-
[1] 蒋济同, 范晓义. 红外热像技术在混凝土检测中的应用现状和发展趋势[J].无损检测,2011,33(2):52-55. [2] FENG Q, WANG G,RÖSHOFF K. Detection of water leakage sing laser images from 3D laser scanning data[J].IAEG, 2006, 750: 1-7.
[3] 徐云乾, 黄春华, 陆雪萍,等. 高密度电阻率法在水库坝肩渗漏隐患检测中的应用[J]. 无损检测, 2016, 38(5): 41-68. [4] 程姝菲,黄宏伟.盾构隧道长期渗漏水检测新方法[J]. 地下空间与工程学报,2014, 10(3): 126-130. [5] 张敏, 刘元绘. 同位素示踪技术在洪泽湖大堤渗水检测中的应用[J]. 中国农村水利水电, 2003(1):39-41. [6] 水中和, 周紫晨, 袁新顺,等.混凝土结构物渗漏检测技术[J]. 无损检测, 2009, 31(10):832-835. [7] 王振宇. 土木工程的层析成像与广义反演研究[D]. 杭州:浙江大学, 2003. [8] BROWN B H, BARBER D C. Electrical impedance tomography, the construction and application to physiological measurement of electrical impedance images[J]. Medical Progress through Technology, 1987, 13(2):69-75.
[9] 任超世. EIT——一种诱人的医学成像新技术[J]. 电子商务, 1996(5):9-13. [10] 徐管鑫. 电阻抗成像技术理论及应用研究[D]. 重庆:重庆大学, 2004: 80-81. [11] 徐桂芝.基于EIT技术的脑内电特性与功能成像研究[D]. 天津:河北工业大学, 2002. [12] HOU T C, LYNCH J P. Electrical impedance tomographic methods for sensing strain fields and crack damage in cementitious structures[J]. Journal of Intelligent Material Systems & Structures, 2009, 20(11):1363-1379.
[13] 杨剑雄, 李星恕, 崔猛. 基于EIT的土壤中油菜根茎检测[J]. 农机化研究, 2015(3):187-190. [14] BROWN B H, SEAGAR A D. The Sheffield data collection system[J]. Clinical Physics & Physiological Measurement, 1987, 8(4A):91-7.
[15] BARBER D C, BROWN B H. Applied potential tomography[J]. Journal of the British Interplanetary Society, 1989, 42(7):1680-1684.
[16] GRAHAM B M, ADLER A. Electrode placement configurations for 3D EIT[J]. Physiological Measurement, 2007, 28(7): 29-44.
[17] 徐桂芝,李颖.生物医学电阻抗成像原理[M].北京: 机械工业出版社, 2010. [18] 何为,罗辞勇,徐征,等.电阻抗成像原理[M].北京: 科学出版社, 2009. [19] ADLER A, LIONHEART W R. Uses and abuses of EIDORS: an extensible software base for EIT.[J]. Physiological Measurement, 2010, 27(5):25-42.
计量
- 文章访问数: 4
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
