2016 16th International Conference on Ground Penetrating Radar (GPR)最新文献_第8页

Mapping paleochannels in the Libyan Sahara with ground penetrating radar 利用探地雷达绘制利比亚撒哈拉地区的古河道

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572655

J. Francke

{"title":"Mapping paleochannels in the Libyan Sahara with ground penetrating radar","authors":"J. Francke","doi":"10.1109/ICGPR.2016.7572655","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572655","url":null,"abstract":"It has been well documented that the Sahara Desert experienced a number of humid periods during the late Quaternary, which resulted in the development of substantial lakes and fluvial networks. Today, the region is known for its hyper-arid conditions, with few isolated oases and no sizable surface drainage system. The remnants of these palaeochannels are now buried beneath the dunefields of the contemporary desert. However, their presence as potential groundwater migration pathways are of importance in understanding the palaeohydrological history of the Sahara, as well potential sources to tap for desert irrigation projects. Conventional means of locating these buried channels have used accurate terrain models to map contemporary seasonal drainage networks (wadis), or satellite-borne radar to penetrate a few meters beneath the sand sheet. An alternative approach is through the use of ground-based geophysics employing a deep-profiling ground penetrating radar technology. A survey over a 15 km × 18 km gravel plain in the Wädi al-Hayät in the Libyan Sahara reveals that ground radar technology can map buried channels rapidly and cost-effectively, given suitable ground conditions.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"3 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123482172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Foundation pile and cavity detection by the 3D directional borehole radar system, ReflexTracker 利用三维定向钻孔雷达系统ReflexTracker进行桩基和空腔探测

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572652

K. Wada, S. Karasawa, K. Kawata, T. Ueki, S. Ebihara

{"title":"Foundation pile and cavity detection by the 3D directional borehole radar system, ReflexTracker","authors":"K. Wada, S. Karasawa, K. Kawata, T. Ueki, S. Ebihara","doi":"10.1109/ICGPR.2016.7572652","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572652","url":null,"abstract":"In order to evaluate our developing 3D directional borehole radar system, ReflexTracker®, we carried out experimental studies on its capability to detect foundation piles in poor subsoil in the Tokyo area, and cavities beside a housing complex in Aichi Prefecture, central Japan. To evaluate foundation pile detectability, we took omnidirectional and directional borehole radar measurements in two boreholes (vertical and tilted at 60 degrees) near known concrete piles. We utilized existing drawings and specifications that well described the piles at the site in terms of their materials, structures, locations, and depths, and conducted GPR and vertical differential magnetic surveys to confirm the exact locations of the pile heads. The measurements were successfully taken for both boreholes. The estimated 3D locations of the reflected points were in good agreement with the known pile locations, with an accuracy of 0.14 to 0.20 m from the pile for measurements with the vertical and the titled boreholes, respectively. For the cavity detectability evaluation, we collected core samples to check geological conditions and existing cavities estimated by drilling operations and N-values by SPT. The directional borehole radar measurements showed several significant reflected phases in a radargram and revealed the existence of the cavities corresponding to the drilling results obtained from 3D reflected points. As a result of the two experimental studies for foundation piles and cavity detectability of the ReflexTracker, we concluded that the system could be applied to civil engineering issues in poor subsoil ground.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128130609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A study of antenna configuration for bistatic ground-penetrating radar 双基地探地雷达天线结构研究

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572697

W. Kang, C. Kim, J. H. Kim, S. Park, S. J. Cho, J. Son, K. W. Kim

引用次数: 10

Simulation of GPR in anisotropic medium by finite element time domain method 各向异性介质中探地雷达的有限元时域模拟

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572685

H. Wang, M. Wang, H. Liu

{"title":"Simulation of GPR in anisotropic medium by finite element time domain method","authors":"H. Wang, M. Wang, H. Liu","doi":"10.1109/ICGPR.2016.7572685","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572685","url":null,"abstract":"A two-dimensional finite element time domain (FETD) algorithm for simulation of ground penetrating radar (GPR) on an anisotropic medium with conductive loss is described. In this algorithm, the finite element method is used to discretize computational area by using the unstructured Delaunay mesh and Newmark difference method for time discretization. The anisotropy of the medium is modeled be orthorhombic symmetry and expressed as the permittivity and conductivity tensors of different propagation directions. The convergence property of our algorithm is verified by comparing it with the analytical solutions of homogenous isotropic and anisotropic media. The influence of material anisotropy to phase velocity and attenuation coefficient of electromagnetic waves are analyzed by comparison with snapshots of homogeneous isotropic and anisotropic media. A model consisting of a cylinder target embedded in an anisotropic medium is further tested to understand the propagation characteristics of the reflected wave. The results demonstrate that material anisotropy can cause significant amplitude and phase velocity distortions. The proposed FETD algorithm for anisotropic medium can be applied to calculate anisotropic GPR problems with high accuracy.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131472541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture characterization with GPR: A comparative study 探地雷达骨折表征的比较研究

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572679

D. Arosio, J. Deparis, L. Zanzi, S. Garambois

{"title":"Fracture characterization with GPR: A comparative study","authors":"D. Arosio, J. Deparis, L. Zanzi, S. Garambois","doi":"10.1109/ICGPR.2016.7572679","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572679","url":null,"abstract":"Provided that the frequency of the GPR antenna is properly selected, detecting rock fractures is generally an achievable task because most of the investigated rocks are resistive. On the other hand, fractures can be generally envisaged as thin-beds embedded in a homogenous rock formation, thus yielding a complex reflection pattern caused by the reverberation of the GPR signal back and forth within the bed. As a result, dedicated approaches must be developed in order to extract quantitative information about fracture properties, i.e. thickness and permittivity of filling material, encoded in the thin-bed response. This work presents a comparison of two approaches for fracture characterization that we recently tested on synthetic, lab as well as field datasets. Although both approaches rely on amplitude and phase information in the frequency domain, their strategies significantly differ. The first one is based on common-offset data and involves deterministic deconvolution, while the second one processes common-midpoint reflections according to an amplitude-and-phase-variation-with-offset inversion. We test the performance of both approaches on a lab specimen scanned with high frequency antennas. Our aim is to identify shortcomings and advantages of the tested approaches, and to evaluate their outcomes according to the needs of possible field applications, in terms of acquisition time and accuracy.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"106 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130054928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Multi-frequency GPR data fusion 多频GPR数据融合

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572512

A. De Coster, S. Lambot

引用次数: 3

A survey of electromagnetic characteristics of soils in the Donbass region (Ukraine) for evaluation of the applicability of GPR and MD for landmine detection 顿巴斯地区(乌克兰)土壤电磁特性调查，以评估探地雷达和MD在地雷探测方面的适用性

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572688

T. Bechtel, S. Truskavetsky, L. Capineri, G. Pochanin, N. Simić, K. Viatkin, A. Sherstyuk, T. Byndych, P. Falorni, A. Bulletti, P. Giannelli, V. Ruban, L. Varyanitza-Roschupkina, M. Bechtel

{"title":"A survey of electromagnetic characteristics of soils in the Donbass region (Ukraine) for evaluation of the applicability of GPR and MD for landmine detection","authors":"T. Bechtel, S. Truskavetsky, L. Capineri, G. Pochanin, N. Simić, K. Viatkin, A. Sherstyuk, T. Byndych, P. Falorni, A. Bulletti, P. Giannelli, V. Ruban, L. Varyanitza-Roschupkina, M. Bechtel","doi":"10.1109/ICGPR.2016.7572688","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572688","url":null,"abstract":"In order to design holographic and impulse GPRs, as well as metal detector (MD) sensors for humanitarian demining in the Donbass conflict zone, we have compiled a listing of the AP and AT mines that have been confirmed in use in Donbass, and their dimensions and construction. Just as importantly, we have attempted, from existing literature (since it is an active war zone), to characterize the specific soils in this region in order to understand the physical property contrasts between mine casings/components and the soils in which they may be buried, as well as the propagation characteristics of radar signals in these soils. We conclude that MD should be generally effective for locating Donbass mines, and GPRs operating near the frequency of 2GHz should provide sufficient penetration for detection and, simultaneously, sufficient resolution to assist with discrimination of mines from clutter. As is common in GPR applications, the main limiting factor may be soil moisture content, so operations may be restricted to dry periods or seasons. Field measurements are scheduled to confirm the values from the literature.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127872877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A step towards quantitative target analysis for GPR 探地雷达定量目标分析的一步

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572643

A. P. Annan, N. Diamanti

{"title":"A step towards quantitative target analysis for GPR","authors":"A. P. Annan, N. Diamanti","doi":"10.1109/ICGPR.2016.7572643","DOIUrl":"https://doi.org/10.1109/ICGPR.2016.7572643","url":null,"abstract":"Ground penetrating radar (GPR) has been employed as an effective means for mapping features buried in the ground or in man-made structures for several decades. The content of a typical GPR reflection profile is graphically displayed showing the signal amplitude versus space and time after signal emission. The position and travel time information of features are then used to characterize target spatial position and depth. We refer to this as `qualitative' analysis, which depends heavily on the human visual interaction with the data. There is a wealth of information in the GPR signal vector fields which is seldom used. Quantitative analysis entails using the amplitude information for more than just a visual selection of target presence. In this paper, we postulate a model similar to the radar range equation approach that can help with simple performance prediction and automated data reduction to material and target parameters. We illustrate the use of three-dimensional (3D) numerical modelling to ascertain the reliability of simplifying assumptions and develop simple models to characterize targets. This approach holds the promise of enabling quantitative data analysis without resorting to complex numerical modelling.","PeriodicalId":187048,"journal":{"name":"2016 16th International Conference on Ground Penetrating Radar (GPR)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125145280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

3D GPR imaging of shallow plastic pipes, tree roots, and small objects 三维探地雷达成像浅塑料管，树根和小物体

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572671

M. Grasmueck, A. Novo

引用次数: 9

Integrated GPR and passive seismic investigations at cultural heritage sites: Case studies in Malta 文化遗址的综合探地雷达和被动地震调查:马耳他案例研究

2016 16th International Conference on Ground Penetrating Radar (GPR) Pub Date : 2016-06-13 DOI: 10.1109/ICGPR.2016.7572608

R. Persico, L. Matera, S. D’Amico, R. Borg, P. Galea

引用次数: 0