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2018 17th International Conference on Ground Penetrating Radar (GPR)最新文献

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A high-stability dual-chip GPR for cooperative target probing 一种用于协同目标探测的高稳定双芯片探地雷达
Pub Date : 2018-06-18 DOI: 10.1109/ICGPR.2018.8441645
D. Rabus, F. Minary, G. Martin, J. Friedt
A complete Ground Penetrating RADAR (GPR) system, including emitter, receiver and processing circuit, has been assembled with minimum part numbers for a compact, low power solution aimed at probing passive cooperative targets acting as sub-surface sensors. The high timing stability of the recorded signal needed for phase analysis is met by clocking all circuits, including the stroboscopic timer, with a quartz disciplined reference signal. We demonstrate 21 ps timing stability when measuring the long term evolution of two echoes separated by 300 ns, consistent with the ability to measure with 1 K resolution surface acoustic wave transducers designed as GPR cooperative sensors, dedicated to temperature sensing in the current demonstration. The solution takes advantage of some of the latest microcontroller peripherals including a timer with 217 ps resolution, for an equivalent time sampling up to 4.6 GS/s. Wireless measurement at a range of 70 cm is demonstrated through air, with a signal to noise ratio allowing for far range measurement in dielectric sub-surface media.
一个完整的探地雷达(GPR)系统,包括发射器、接收器和处理电路,已经组装成一个紧凑、低功耗的解决方案,旨在探测作为地下传感器的被动合作目标。相位分析所需的记录信号的高定时稳定性是通过对包括频闪计时器在内的所有电路进行时钟处理来满足的,这些电路使用石英纪律参考信号。在测量间隔300 ns的两个回波的长期演变时,我们展示了21 ps的定时稳定性,这与使用设计为GPR合作传感器的1 K分辨率表面声波换能器进行测量的能力一致,该传感器在当前演示中专门用于温度传感。该解决方案利用了一些最新的微控制器外设,包括一个217 ps分辨率的定时器,等效时间采样高达4.6 GS/s。无线测量在70厘米的范围内演示了通过空气,信噪比允许在介电地下介质的远距离测量。
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引用次数: 1
Ice volume estimates of Swiss glaciers using helicopter-borne GPR — an example from the Glacier de la Plaine Morte 利用直升机机载探地雷达估算瑞士冰川的冰量——以冰川de la Plaine Morte为例
Pub Date : 2018-06-18 DOI: 10.1109/ICGPR.2018.8441613
M. Grab, A. Bauder, F. Ammann, L. Langhammer, Sebastian Hellmann, G. Church, Lino Schmid, L. Rabenstein, H. Maurer
Better knowledge of the existing ice volume and the bedrock topography of Alpine glaciers is required to overcome challenges occurring from the environmental and economic impact of the ongoing melting of the glaciers. To obtain this information, we have recently developed a helicopter-borne GPR-system from commercially available components, and we have established a MATLAB®-based processing software package. Using the example of the Glacier de la Plaine Morte, we demonstrate how this instrument and software can be employed to image the bedrock topography and to determine the spatial ice thickness distribution.
为了克服冰川持续融化所带来的环境和经济影响所带来的挑战,需要更好地了解高山冰川的现有冰量和基岩地形。为了获得这些信息,我们最近利用市售组件开发了一种直升机机载gpr系统,并建立了基于MATLAB®的处理软件包。以冰川de la Plaine Morte为例,我们演示了如何使用该仪器和软件对基岩地形进行成像并确定空间冰厚分布。
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引用次数: 24
Use of GPR for Monitoring Expansion Mechanism of Subsurface Cavity 利用探地雷达监测地下空腔膨胀机理
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441539
Yeon Tae Kim, J. Choi, H. Park, Ki Deok Kim
Recently, many road collapse accidents have occurred due to subsurface cavities in the urban areas of Korea. This study is aimed to figure out the expansion of the subsurface cavity and estimate the time of pavement failure with repeated load applications through accelerated pavement testing (APT) and ground penetrating radar (GPR) testing. The different sizes of artificial cavities made by ice cubes were installed at different depths in the full-scale APT testbed. The GPR testing was utilized to monitor the expansion of the subsurface cavity with APT load applications.
最近,在韩国城市地区,由于地下洞而发生的道路坍塌事故很多。本研究旨在通过加速路面试验(APT)和探地雷达(GPR)试验,估算重复荷载作用下路面的地下空腔扩展情况和破坏时间。在全尺寸APT试验台上,在不同深度安装了不同尺寸的冰块人工空腔。GPR测试用于监测APT载荷作用下地下空腔的扩张情况。
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引用次数: 0
A m-sequence UWB radar system design and contrast test with an impulse radar m序列超宽带雷达系统设计及与脉冲雷达的对比试验
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441647
Xin Liu, Kunyu Yan, Zhongcheng Chen, Cheng Li, Jingwei Zhang, S. Ye, G. Fang
UWB radar is widely used ranging from tracing through the wall, anti-terrorist stabilization, earthquake and disaster relief to archaeological discoveries and geological surveys. In this paper, a m-sequence UWB radar is designed to solve the problem of detection range and resolution, and to meet the relatively simple structure and can be applied to a variety of application scenarios. Finally, the contrast field test with an impulse radar was carried out, and it confirmed that the m-sequence UWB radar has more detection capability and anti-noise performance than impulse radar
超宽带雷达广泛应用于墙体追踪、反恐稳定、地震救灾、考古发现和地质调查等领域。本文设计了一种m序列超宽带雷达,解决了探测距离和分辨率的问题,满足了结构相对简单,可应用于多种应用场景。最后,与脉冲雷达进行了对比场试验,验证了m序列超宽带雷达比脉冲雷达具有更强的探测能力和抗噪声性能
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引用次数: 6
Noise suppression of GPR data using Variational Mode Decomposition 基于变分模态分解的探地雷达数据噪声抑制
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441627
Xuebing Zhang, Xuan Feng, E. Nilot, Minghe Zhang
Ground penetrating radar (GPR) has been used in the many aspects, such as civil engineering and the earth sciences. And the analysis and noise suppression of GPR data have always been the research focus. In this study, a new self-adaptive time-frequency decomposition tool called the variational mode decomposition (VMD) is introduced. We use the VMD method to derive a set of stationary sub-components, and based on the decomposition, we separate the valid signals and the components which are corresponded to the noise. One trace of GPR data are given to test the effect of the VMD decomposition, and the empirical mode decomposition (EMD) is also employed as a comparison. And a primary noise-suppression method based on the VMD scheme is also proposed. The application of the field GPR data further demonstrates the better performance of the proposed method in both noise suppression and the retention of geophysical events.
探地雷达(GPR)在土木工程和地球科学等诸多领域都有广泛的应用。而探地雷达数据的分析与噪声抑制一直是研究的热点。本文介绍了一种新的自适应时频分解工具——变分模态分解(VMD)。利用VMD方法推导出一组平稳子分量,在此基础上分离出有效信号和噪声对应分量。以一段探地雷达数据为例,验证了VMD分解的效果,并与经验模态分解(EMD)进行了比较。并提出了一种基于VMD方案的初级噪声抑制方法。实地探地雷达数据的应用进一步证明了该方法在噪声抑制和地球物理事件保留方面具有较好的效果。
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引用次数: 2
Nondestructive Inspection of an Airport Pavement by MIMO Array GPR YAKUMO MIMO阵列探地雷达对机场路面的无损检测
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441623
Lilong Zou, Kazutaka Kikuta, Motoyuki Sato
In this paper, an efficient and objective method to detect the occurrence of layer de-bonding in asphalt pavement layer has developed. This method evaluates the lateral wave amplitude of CMP gathers by a multiple-input and multiple-output (MIMO) GPR system YAKUMO. The system operates in the frequency range from 50 MHz to 1.5 GHz. It consists of 8 transmitting antenna array and 8 receiving antenna array. Each antenna has 24 cm separation spacing, both transmitting and receiving antenna array. Considering the antenna configuration and designing survey lines spacing, amount of CMP gathers could extract out in a large survey area. After the amplitude correction, the lateral wave amplitude of each CMP gather was analyzed. In particular, this method allows us to distinguish the multiple echoes contribution which was generated by the stripping phenomenon occurred between asphalt layers. The real application demonstrated this method at Tokyo International airport taxiway. The method shows a high consistency of the traditional sounding method. It provides an innovative way for the stripping detection of the partially damaged pavement while were hard to be observed by the reflected signals.
本文提出了一种高效、客观的检测沥青路面层脱粘现象的方法。采用多输入多输出(MIMO)探地雷达系统YAKUMO对CMP采集的横向波幅进行了评价。系统工作频率范围为50mhz ~ 1.5 GHz。它由8个发射天线阵和8个接收天线阵组成。每个天线有24厘米的间隔,发射和接收天线阵列。考虑天线的配置和测量线间距的设计,可以在较大的测量区域内提取出大量的CMP集。振幅校正后,对各CMP集的横向波振幅进行分析。特别是,该方法使我们能够区分沥青层之间发生剥离现象所产生的多重回波贡献。该方法在东京国际机场滑行道上进行了实际应用。该方法与传统测深方法具有较高的一致性。该方法为反射信号难以观测到的部分破损路面剥离检测提供了一种创新方法。
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引用次数: 2
Dual Sensor “ALlS” for Humanitarian Demining 人道主义排雷双传感器“all”
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441662
Motoyuki Sato, Kazutaka Kikuta, Iakov Chemyak
ALIS is a handheld “Dual sensor” which is designed to be used for humanitarian demining. The ALIS system is compact and light weight which is less than 3.1kg, and can be used for more than 6 hours. ALIS is a dual sensor, which combines EMI (Electromagnetic Induction) sensor and GPR (Ground Penetrating Radar). This is a hand held sensor, equipped with position tracking system, therefore ALIS can acquire the EMI and GPR signal together with its position information, while it is scanned on the ground surface by an operator by hand manually. Then, the data can be processed using Synthetic Aperture Radar (SAR) processing (migration) and can reconstruct 3-D subsurface image. GPR of ALIS operates at 1-3GHz, and the penetration depth of the GPR is 20-50cm. The development of ALIS started in 2002, and after evaluation test in some mine affected countries including Afghanistan, a long-term evaluation test has been conducted in Cambodia since 2009. We found that the prototype of ALIS is capable for imaging buried mines, and can reduce the false alarm ratio drastically. We have detected more than 80 buried land mines in Cambodia mine fields. The ALIS is based on these practical evaluation conducted together with CMAC (Cambodian Mine Action Center).
ALIS是一种手持“双传感器”,设计用于人道主义排雷。ALIS系统结构紧凑,重量轻,小于3.1kg,可使用6小时以上。ALIS是一种双传感器,结合了EMI(电磁感应)传感器和GPR(探地雷达)。这是一个手持传感器,配备位置跟踪系统,因此ALIS可以获取EMI和GPR信号及其位置信息,同时由操作员手动在地面上进行扫描。然后,利用合成孔径雷达(SAR)对数据进行处理(偏移),重建三维地下图像。ALIS的探地雷达工作频率为1-3GHz,探地雷达穿透深度为20-50cm。ALIS的研制始于2002年,在阿富汗等一些受地雷影响的国家进行了评价试验后,从2009年开始在柬埔寨进行了长期评价试验。结果表明,该系统能够对埋地地雷进行成像,大大降低了误报率。我们在柬埔寨雷区发现了80多枚地雷。ALIS是基于这些与CMAC(柬埔寨地雷行动中心)一起进行的实际评估。
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引用次数: 4
Effect of Two Different Protective Surface Materials on Ground Penetrating Radar Signal Characteristics 两种不同防护表面材料对探地雷达信号特性的影响
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441540
R. Jacob, F. Berna, T. Urban, M. Chazan
Minimizing the disturbance caused during ground penetrating radar (GPR) data collection at archaeologic sites with loose surface material, such as at the Wonderwerk Cave, is critically important to archaeologists. We evaluate the potential use of two commercially available materials that could protect the surface from the movement of the GPR antennas. The average time amplitude and average frequency spectrum from GPR data collected on each material indicate differences between the materials, in addition to the difference to GPR data collected directly on the ground surface. Further differences are documented for the velocity estimates from a subsurface reflection. However, the amplitude versus offset from the same reflection is similar between the GPR data collected on the different surface protective materials and the direct contact data.
对考古学家来说,尽量减少在具有松散地表物质的考古遗址(如Wonderwerk洞穴)收集探地雷达(GPR)数据时造成的干扰是至关重要的。我们评估了两种商用材料的潜在用途,这两种材料可以保护表面免受GPR天线的移动。每种材料上的探地雷达数据的平均时幅和平均频谱除了与直接在地面上采集的探地雷达数据的差异外,还表明了材料之间的差异。进一步的差异记录了从地下反射估计的速度。然而,在不同表面防护材料上收集的探地雷达数据与直接接触数据之间,同一反射的振幅与偏移量相似。
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引用次数: 2
GPR (Ground Penetrating Radar) Survey at Notion (June 2017) 探地雷达(GPR)测量在概念(2017年6月)
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441675
Firat Yiğit, G. Tucker, Serkan Özcelik
In June 2017, we conducted a GPR (Ground Penetrating Radar) survey at the ancient city of Notion as part of the Notion Archaeological Survey. In prior seasons, magnetic gradiometry survey revealed much of the form and fabric of the city, and this season we decided to complement these results with GPR investigations in the hope of obtaining more detailed 3-dimensional results in targeted areas of the site. The survey was undertaken with 200 and 400 MHz shielded antennae with a focus on mapping the bedrock profile as well as features within 2.5m of the ground surface. The survey areas across the site targeted places where the results could best help answer the research questions of the project and include a terrace near the city wall overlooking the valley to the north with two visible threshold blocks and two terraces to the east side of the site which prior survey has shown were likely domestic spaces. The purpose of surveying these areas was to explore the possible buried roads and houses, more precisely mapping them and identifying their depth. The collected data have been combined to produce a 3-D cube representing the features laying beneath the subsurface. From these 3-D cubes, it is possible to produce amplitude time-slices at various depths below the surface, which show the anomalies detected during the survey. The initial results of the GPR survey have been inspiring and will contribute greatly to our understanding of the site, while also forming the basis for future investigations through further survey or excavation.
2017年6月,作为概念考古调查的一部分,我们在概念古城进行了探地雷达(GPR)调查。在前几个季节,磁梯度测量揭示了城市的许多形式和结构,这一季我们决定用探地雷达调查来补充这些结果,希望在场地的目标区域获得更详细的三维结果。该调查使用200和400兆赫的屏蔽天线进行,重点是绘制基岩剖面以及距地面2.5米以内的特征。整个场地的调查区域针对的是结果最能帮助回答项目研究问题的地方,包括城墙附近的一个露台,俯瞰北部的山谷,有两个可见的门槛块和场地东侧的两个露台,先前的调查显示这些露台可能是家庭空间。调查这些地区的目的是探索可能被埋的道路和房屋,更精确地绘制它们的地图并确定它们的深度。收集到的数据被组合成一个三维立方体,代表地下的特征。通过这些三维立方体,可以在地表以下不同深度产生振幅时间片,显示调查期间检测到的异常。探地雷达的初步调查结果令人鼓舞,将大大有助于我们对遗址的了解,同时也为未来进一步调查或挖掘奠定基础。
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引用次数: 1
Application of the Attribute Analysis for Interpretation of GPR Survey Data 属性分析在探地雷达测量数据解释中的应用
Pub Date : 2018-06-01 DOI: 10.1109/ICGPR.2018.8441609
N. Pudova, M. Shirobokov, A. Kuvaldin
An investigation of extended road surfaces with artificial pavement, as well as of railways, airfield runways and monolithic concrete structures when searching for defects, cracks and voids in the pavement, or locating weakness zones in high humidity areas and sub-base subsidences. The application of an Attribute Analysis for interpreting data obtained while Ground Penetrating Radar (GPR) surveying allows one to isolate anomaly zones of a given section with much less effort. The attributes offered allow one to undertake an analysis of amplitude and frequency parameters, as well as of the parameters associated with the attenuation of an electromagnetic field in the temporal and frequency domains. The Attribute Analysis boosts the quality of GPR data, simplifies finding the location of fractured zones in artificial structures, easily locates high humidity areas, ground compaction and possible voids under the hard surface of engineering structures with extended areas, and visually provides data in a simple to grasp form.
对有人工路面的延伸路面、铁路、机场跑道和整体混凝土结构进行调查,以寻找路面的缺陷、裂缝和空洞,或在高湿地区和次基层沉降中定位薄弱区域。应用属性分析对探地雷达(GPR)测量时获得的数据进行解释,使人们能够以更少的努力隔离给定剖面的异常带。所提供的属性允许人们进行幅度和频率参数的分析,以及在时域和频域中与电磁场衰减相关的参数。属性分析提高了探地雷达数据的质量,简化了人工构筑物裂缝区位置的查找,便于对面积较大的工程构筑物坚硬表面下的高湿区、地面压实区和可能存在的空洞进行定位,并以易于掌握的形式直观地提供数据。
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引用次数: 2
期刊
2018 17th International Conference on Ground Penetrating Radar (GPR)
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