Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970467
V. Utsi
The detection of buried Fibre Optic (FO) cables in an urban environment is a problem when using GPR. The fibres themselves are not detectable as they are essentially sand. What can be detected is the cable strengthening, the jacket, the trenching, the ducts they are in and if included, any tracer wires or tape.
{"title":"Detection of Fibre Optic cables using GPR","authors":"V. Utsi","doi":"10.1109/ICGPR.2014.6970467","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970467","url":null,"abstract":"The detection of buried Fibre Optic (FO) cables in an urban environment is a problem when using GPR. The fibres themselves are not detectable as they are essentially sand. What can be detected is the cable strengthening, the jacket, the trenching, the ducts they are in and if included, any tracer wires or tape.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115111410","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970527
E. Eide, P. A. Våland, J. Sala
This paper describes a new broadband ground coupled antenna array for step-frequency GPR operating continuously over the frequency range from 200 MHz - 3 GHz. The broad frequency range makes the array suitable both for high resolution shallow imaging and deeper investigations where efficient coupling of energy into the ground is crucial. A method for estimating penetration depth based on signal variance is described. The paper contains data examples from the new antenna array and also contains comparison with similar data from an air-coupled bowtie array. Finally, the paper discusses the benefits and disadvantages using air-coupled versus ground-coupled antennas for various applications.
{"title":"Ground-coupled antenna array for step-frequency GPR","authors":"E. Eide, P. A. Våland, J. Sala","doi":"10.1109/ICGPR.2014.6970527","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970527","url":null,"abstract":"This paper describes a new broadband ground coupled antenna array for step-frequency GPR operating continuously over the frequency range from 200 MHz - 3 GHz. The broad frequency range makes the array suitable both for high resolution shallow imaging and deeper investigations where efficient coupling of energy into the ground is crucial. A method for estimating penetration depth based on signal variance is described. The paper contains data examples from the new antenna array and also contains comparison with similar data from an air-coupled bowtie array. Finally, the paper discusses the benefits and disadvantages using air-coupled versus ground-coupled antennas for various applications.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122783331","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970396
G. Leucci
Ground-penetrating Radar (GPR) is a non-destructive methodology that have become a very important tool for non-destructive underground exploration. For the localisation of buried structures, it uses short time duration electromagnetic (EM) pulses lasting from about 1 ns to about 30 ns. Therefore, GPR is characterised by a wide frequency band ranging from 10 MHz to some GHz, and is useful in the localisation of EM discontinuities in the subsurface with high resolution. This case study shows a practical example of the usage of the 3D GPR technique to evaluate the state of maintenance of an hypogeum structure located in an urban area. The hypogeum structure is in danger of falling because of the numerous fractures present in the rock that constitutes the roof of the same structure. The study was made to assist the design of the restoration works of the hypogeum. Because of the very narrow thickness of the fractures, special care was needed in the acquisition and processing steps. Although pushed to the limit of the resolution achievable by the available antenna, the study has given quite good results.
{"title":"3D high resolution GPR applied for evaluating the hypogeum structure conservation state in urban area","authors":"G. Leucci","doi":"10.1109/ICGPR.2014.6970396","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970396","url":null,"abstract":"Ground-penetrating Radar (GPR) is a non-destructive methodology that have become a very important tool for non-destructive underground exploration. For the localisation of buried structures, it uses short time duration electromagnetic (EM) pulses lasting from about 1 ns to about 30 ns. Therefore, GPR is characterised by a wide frequency band ranging from 10 MHz to some GHz, and is useful in the localisation of EM discontinuities in the subsurface with high resolution. This case study shows a practical example of the usage of the 3D GPR technique to evaluate the state of maintenance of an hypogeum structure located in an urban area. The hypogeum structure is in danger of falling because of the numerous fractures present in the rock that constitutes the roof of the same structure. The study was made to assist the design of the restoration works of the hypogeum. Because of the very narrow thickness of the fractures, special care was needed in the acquisition and processing steps. Although pushed to the limit of the resolution achievable by the available antenna, the study has given quite good results.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122789649","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970552
C. Trela, T. Kind, M. Schubert, M. Gunther
GPR surveys on concrete structures like bridges, decks and buildings are successfully applied to detect and localize construction elements mostly made of metal. Defects like air voids behind rebars in incompletely compacted concrete still represent major challenges due to their weak reflection amplitudes. In a systematic study at a concrete test specimen with vertical rebars and simulated air voids of different size and depth, the effects of different GPR data acquisition parameters like antenna frequencies (1.2 up to 2.6 GHz) and antenna orientation on the quality of imaging of these air voids were investigated. Very dense measurements with high position accuracy were carried out using an automated scanning system. Despite the strong shadowing and disturbing interference effects of the reinforcement and the associated strong reflections, the weak scatterers can still be identified to a certain depth using appropriate antenna configurations. Measurements with the antenna orientation perpendicular to the rebars of 1.2 to 2.0 GHz give the best results. Preand postprocessing steps like filtering, gain, 3D SAFT (Synthetic Aperture Focusing Technique) reconstruction and some adapted visualization options were properly applied to improve the imaging results of these weak scatterers.
{"title":"Detection of weak scatterers in reinforced concrete structures","authors":"C. Trela, T. Kind, M. Schubert, M. Gunther","doi":"10.1109/ICGPR.2014.6970552","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970552","url":null,"abstract":"GPR surveys on concrete structures like bridges, decks and buildings are successfully applied to detect and localize construction elements mostly made of metal. Defects like air voids behind rebars in incompletely compacted concrete still represent major challenges due to their weak reflection amplitudes. In a systematic study at a concrete test specimen with vertical rebars and simulated air voids of different size and depth, the effects of different GPR data acquisition parameters like antenna frequencies (1.2 up to 2.6 GHz) and antenna orientation on the quality of imaging of these air voids were investigated. Very dense measurements with high position accuracy were carried out using an automated scanning system. Despite the strong shadowing and disturbing interference effects of the reinforcement and the associated strong reflections, the weak scatterers can still be identified to a certain depth using appropriate antenna configurations. Measurements with the antenna orientation perpendicular to the rebars of 1.2 to 2.0 GHz give the best results. Preand postprocessing steps like filtering, gain, 3D SAFT (Synthetic Aperture Focusing Technique) reconstruction and some adapted visualization options were properly applied to improve the imaging results of these weak scatterers.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130757646","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970521
Xiaojun Liu, S. Lang, Bo Zhao, Feng Zhang, Jun Li, Bin Zhou, G. Fang, X. Cui, Bo Sun
Polar ice penetrating radar is one of the most important devices for polar ice depth sounding. A high resolution ice-penetrating radar is developed to measure the thickness of glacial ice and observe the internal structures and basal conditions of glaciers and ice sheets. With a transmitting frequency at 100-150 MHz, this radar provides a range resolution of about 2m and a penetrating depth about 3000m under polar ice. The radar system uses pulse compression and coherent integration techniques to obtain a high processing gain and improve the signal to noise ratio of the system. A high-speed Direct Digital Synthesizer (DDS) is applied to generate a chirp signal as an input source for the transmitter. The implementation of the digital unit is based on a piece of FPGA chip. To reduce the hardware complexity, intermediate frequency sampling is adopted to digitalize the received analog signal. The measurements were successfully implemented in the 28th Chinese National Antarctic Research Expedition (CHINARE 28, 2011/12) near China Zhongshan Station.
{"title":"A high-resolution polar ice penetrating radar and experiments in the 28th Chinese National Antarctic Research Expedition","authors":"Xiaojun Liu, S. Lang, Bo Zhao, Feng Zhang, Jun Li, Bin Zhou, G. Fang, X. Cui, Bo Sun","doi":"10.1109/ICGPR.2014.6970521","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970521","url":null,"abstract":"Polar ice penetrating radar is one of the most important devices for polar ice depth sounding. A high resolution ice-penetrating radar is developed to measure the thickness of glacial ice and observe the internal structures and basal conditions of glaciers and ice sheets. With a transmitting frequency at 100-150 MHz, this radar provides a range resolution of about 2m and a penetrating depth about 3000m under polar ice. The radar system uses pulse compression and coherent integration techniques to obtain a high processing gain and improve the signal to noise ratio of the system. A high-speed Direct Digital Synthesizer (DDS) is applied to generate a chirp signal as an input source for the transmitter. The implementation of the digital unit is based on a piece of FPGA chip. To reduce the hardware complexity, intermediate frequency sampling is adopted to digitalize the received analog signal. The measurements were successfully implemented in the 28th Chinese National Antarctic Research Expedition (CHINARE 28, 2011/12) near China Zhongshan Station.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115899550","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970442
M. Ahmed, R. Tarefder, A. Maji
Accurate pavement material identification and layer thickness determination are indispensable in a backcalculation of layer moduli from Falling Weight Deflectometer (FWD) test. Conventionally, pavement layer material and thickness are incorporated in the FWD data analysis as collected from design history or coring. However, coring at every FWD test locations is expensive and time-consuming. It is prudent for any state agency to adopt the Ground Penetrating Radar (GPR) technology to identify materials in different layer of pavement and their as-built thicknesses. This study examines the accuracy of backcalculation of layer moduli from FWD test using GPR data. In this study, FWD test is conducted on pavement section at Milepost 141 on Interstate 40 (I-40) near Albuquerque, New Mexico. The backcalculation analysis is performed using the layer thicknesses as collected from the design history. Later, GPR is used to predict the as-built layer thicknesses of this section. Pavement layer moduli are again backcalculated using the GPR predicted thicknesses. It is observed that incorporation of as-built thicknesses in backcalculation process leads to a significant difference in predicted layer moduli. Therefore, a recommendation is made to conduct simultaneous operation of GPR and FWD test for pavement analysis and design.
{"title":"Variation of FWD modulus due to incorporation of GPR predicted laye thicknesses","authors":"M. Ahmed, R. Tarefder, A. Maji","doi":"10.1109/ICGPR.2014.6970442","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970442","url":null,"abstract":"Accurate pavement material identification and layer thickness determination are indispensable in a backcalculation of layer moduli from Falling Weight Deflectometer (FWD) test. Conventionally, pavement layer material and thickness are incorporated in the FWD data analysis as collected from design history or coring. However, coring at every FWD test locations is expensive and time-consuming. It is prudent for any state agency to adopt the Ground Penetrating Radar (GPR) technology to identify materials in different layer of pavement and their as-built thicknesses. This study examines the accuracy of backcalculation of layer moduli from FWD test using GPR data. In this study, FWD test is conducted on pavement section at Milepost 141 on Interstate 40 (I-40) near Albuquerque, New Mexico. The backcalculation analysis is performed using the layer thicknesses as collected from the design history. Later, GPR is used to predict the as-built layer thicknesses of this section. Pavement layer moduli are again backcalculated using the GPR predicted thicknesses. It is observed that incorporation of as-built thicknesses in backcalculation process leads to a significant difference in predicted layer moduli. Therefore, a recommendation is made to conduct simultaneous operation of GPR and FWD test for pavement analysis and design.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123018015","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970502
Xiaoji Song, Yi Su, Yutao Zhu, Chunlin Huang, Min Lu
Holographic radar usually adopts antenna with wide beam pattern to form a big synthetic aperture and to obtain high spatial resolution. However, previous works have indicated that the antenna pattern is essentially a low-pass filter in wavenumber domain and it reduces the practical resolution. To eliminate the influence of the antenna pattern and improve the practical resolution, this paper presents a deconvolution method implemented in two-dimension wavenumber domain. The proposed method acquires parameters by scaling and shifting the target echo to design a Wiener filter. With this Wiener filter, the received signal is deconvolved to restore the wavenumber spectrum. Some numerical simulations and laboratory experiments were conducted. The imaging results of the deconvolved data show that the resolution improved by 50%.
{"title":"Improving holographic radar imaging resolution via deconvolution","authors":"Xiaoji Song, Yi Su, Yutao Zhu, Chunlin Huang, Min Lu","doi":"10.1109/ICGPR.2014.6970502","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970502","url":null,"abstract":"Holographic radar usually adopts antenna with wide beam pattern to form a big synthetic aperture and to obtain high spatial resolution. However, previous works have indicated that the antenna pattern is essentially a low-pass filter in wavenumber domain and it reduces the practical resolution. To eliminate the influence of the antenna pattern and improve the practical resolution, this paper presents a deconvolution method implemented in two-dimension wavenumber domain. The proposed method acquires parameters by scaling and shifting the target echo to design a Wiener filter. With this Wiener filter, the received signal is deconvolved to restore the wavenumber spectrum. Some numerical simulations and laboratory experiments were conducted. The imaging results of the deconvolved data show that the resolution improved by 50%.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129483316","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970564
Xinjian Tang, W.Z. Ren, T. Sun, Renjun Hou
Due to complex subsurface situation, echo signals surveyed with Ground Penetration Radar (GPR) often contain a lot of clutters, including direct-coupling wave, random noises and multiples. Existence of these clutters submerges measured feature signals of rock structures with GPR, so suppression of them is often essential conduct for rock feature extraction. For extracting rockmass structure features from surveyed GPR data signals, sparse representation (SR) of the signals is an invaluable scheme with a small number of elementary signals from over-complete dictionary. In processing GPR signal data for extraction of rock structure and fracture features, this paper investigates sole Curvelet transform or matching pursuit (MP) for directcoupling wave and clutter suppression and feature extraction, and analyzes their limitations. By modeling ground penetrating radar signals with sparse decomposition, the method can achieve better results. Experimental results with simulation as well as real field data show that the proposed sparse decomposition achieves efficient signal representation and yields discriminative features for geological interpretation.
{"title":"Application of sparse representation of ground penetrating radar data in a study of extracting rock fracture signature","authors":"Xinjian Tang, W.Z. Ren, T. Sun, Renjun Hou","doi":"10.1109/ICGPR.2014.6970564","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970564","url":null,"abstract":"Due to complex subsurface situation, echo signals surveyed with Ground Penetration Radar (GPR) often contain a lot of clutters, including direct-coupling wave, random noises and multiples. Existence of these clutters submerges measured feature signals of rock structures with GPR, so suppression of them is often essential conduct for rock feature extraction. For extracting rockmass structure features from surveyed GPR data signals, sparse representation (SR) of the signals is an invaluable scheme with a small number of elementary signals from over-complete dictionary. In processing GPR signal data for extraction of rock structure and fracture features, this paper investigates sole Curvelet transform or matching pursuit (MP) for directcoupling wave and clutter suppression and feature extraction, and analyzes their limitations. By modeling ground penetrating radar signals with sparse decomposition, the method can achieve better results. Experimental results with simulation as well as real field data show that the proposed sparse decomposition achieves efficient signal representation and yields discriminative features for geological interpretation.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125412862","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970449
J. Hugenschmidt, A. Fischer, L. Schiavi
“Punching” describes a mode of failure where a pile remains standing upright but the ceiling carried by the pile collapses. Punching failures of car park ceilings have occurred several times in recent years, sometimes with disastrous results. In order to avoid punching failure, several systems of punching shear reinforcement are available that can be placed during construction in the concrete ceiling in the vicinity of piles. For an evaluation of the risk of punching failure the details of the structure have to be known. In particular, the presence or absence of punching shear reinforcement has to be known. If this is not the case, for example because plans of the building are unavailable, non-destructive testing may be an option. This paper presents a series of experiments carried out in car parks, where the presence or absence of punching shear reinforcement was known. GPR data were acquired around piles and processed subsequently. It can be shown that a range of punching shear reinforcement can be clearly identified.
{"title":"Punching failure of car park ceilings - An analysis using GPR","authors":"J. Hugenschmidt, A. Fischer, L. Schiavi","doi":"10.1109/ICGPR.2014.6970449","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970449","url":null,"abstract":"“Punching” describes a mode of failure where a pile remains standing upright but the ceiling carried by the pile collapses. Punching failures of car park ceilings have occurred several times in recent years, sometimes with disastrous results. In order to avoid punching failure, several systems of punching shear reinforcement are available that can be placed during construction in the concrete ceiling in the vicinity of piles. For an evaluation of the risk of punching failure the details of the structure have to be known. In particular, the presence or absence of punching shear reinforcement has to be known. If this is not the case, for example because plans of the building are unavailable, non-destructive testing may be an option. This paper presents a series of experiments carried out in car parks, where the presence or absence of punching shear reinforcement was known. GPR data were acquired around piles and processed subsequently. It can be shown that a range of punching shear reinforcement can be clearly identified.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125436638","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}
Pub Date : 2014-12-04DOI: 10.1109/ICGPR.2014.6970511
Feng Yang, Xu Qiao, Yuanyuan Zhang, Xianlei Xu
Ground penetrating radar (GPR) technology is one of the main techniques of the underground pipeline detection. We can analyze the information of the underground pipeline effectively and accurately by the ground penetrating radar data. There used to be three kinds of methods to predict pipeline position and diameter by hyperbola: using the method of least square curve fitting, using Hough transform to predict in parameter space, and using template matching method. This paper will begin with a model, and analyze several factors affecting the pipeline detection. According to the model and the factors, we put forward a new method to calculate the position and diameter of pipeline. The difference between this method and the traditional method is to calculate with the help of the hyperbolic asymptote, and to reduce factitious factors by a clustering method. The image of underground target from the movement of GPR will generate edge information like hyperbola. We can extract the hyperbola from the image by extreme value methods or differential operator methods. In contrast, our method neither needs to pre design templates, nor needs complex calculation. It is suitable for real-time data processing of GPR.
{"title":"Prediction method of underground pipeline based on hyperbolic asymptote of GPR image","authors":"Feng Yang, Xu Qiao, Yuanyuan Zhang, Xianlei Xu","doi":"10.1109/ICGPR.2014.6970511","DOIUrl":"https://doi.org/10.1109/ICGPR.2014.6970511","url":null,"abstract":"Ground penetrating radar (GPR) technology is one of the main techniques of the underground pipeline detection. We can analyze the information of the underground pipeline effectively and accurately by the ground penetrating radar data. There used to be three kinds of methods to predict pipeline position and diameter by hyperbola: using the method of least square curve fitting, using Hough transform to predict in parameter space, and using template matching method. This paper will begin with a model, and analyze several factors affecting the pipeline detection. According to the model and the factors, we put forward a new method to calculate the position and diameter of pipeline. The difference between this method and the traditional method is to calculate with the help of the hyperbolic asymptote, and to reduce factitious factors by a clustering method. The image of underground target from the movement of GPR will generate edge information like hyperbola. We can extract the hyperbola from the image by extreme value methods or differential operator methods. In contrast, our method neither needs to pre design templates, nor needs complex calculation. It is suitable for real-time data processing of GPR.","PeriodicalId":212710,"journal":{"name":"Proceedings of the 15th International Conference on Ground Penetrating Radar","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129146148","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}
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