To identify the weaknesses of concrete from GPR images with employing evolution curve model
GPR systems emit a series of signals in microwave format. The emitted signals will pass through or be reflected at the interface between two different materials. While the emitted signals pass through different materials, the velocities of the emitted signals are changed due to the properties of the materials, like the properties of dielectric permittivity and conductivity permittivity. GPR systems clearly record the changes of the reflected energy of the emitted signals. The weaknesses of concrete usually are caused with the unbalance forces acting during grouting concrete, temperature changes at curing concrete, sea water erosions and etc. The research assumes that the emitted signals will have different behaviors while the signals pass through the weaknesses of concrete with comparing that the signals pass through the health concrete. This paper employs curve evolution model implemented with the level set scheme to isolate the regional boundaries from the image recorded with GPR system. With the proposed approach, the proposed algorithm maintains the numerical stability, and the regional boundaries of the weaknesses of concrete are located such that the elements contained in the same region will have the similar properties in GPR images.
Regional Boundaries Evolution Curve GPR
Yishuo HUANG Sung-Chi HUS Shang-Yuh LIN
Department of Construction Engineering, Chaoyang University of Technology, Wufeng, Taiwan 413
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
251-256
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）