Use of Ground Penetrating Radar in the Evaluation of Wood Structures: A Review

This paper is a review of published studies involving the use of ground penetrating radar (GPR) on wood structures. It also contains background information to help the reader understand how GPR functions. The use of GPR on wood structures began to grow in popularity at the turn of the millennium. GPR has many characteristics that make it attractive as an inspection tool for wood: it is faster than many acoustic and stress wave techniques; it does not require the use of a couplant; while it can also detect the presence of moisture. Moisture detection is of prime concern, and several researchers have labored to measure internal moisture using GPR. While there have been several laboratory studies involving the use of GPR on wood, its use as an inspection tool on large wood structures has been limited. This review identified knowledge gaps that need to be addressed to improve the efficacy of GPR as a reliable inspection tool of wood structure. Chief among these gaps, is the ability to distinguish the type of internal feature from the GPR output and the ability to identify internal decay.

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Non-Invasive Moisture Detection for the Preservation of Cultural Heritage

Heritage ◽

10.3390/heritage1010011 ◽

2018 ◽

Vol 1 (1) ◽

pp. 163-170 ◽

Cited By ~ 3

Author(s):

Pier Barone ◽

Carlotta Ferrara

Keyword(s):

Cultural Heritage ◽

Ground Penetrating Radar ◽

Critical Issue ◽

Established Method ◽

Heritage Sites ◽

Non Invasive ◽

Wall Structures ◽

Moisture Detection ◽

Ground Penetrating ◽

Non Destructive

Moisture damage is the most critical issue regarding the preservation and integrity of cultural heritage sites. The electromagnetic (EM) sensitivity to the presence of moisture, in both soils and structural materials, is a well-known phenomenon. Thereby, studying the EM response to the presence of moisture, in order to prevent the damages done to sites of cultural heritage, is a well-established method. This paper will discuss the ability of a geophysical non-destructive technique (NDT), present in a Ground Penetrating Radar (GPR) system, to investigate a very precious building in Rome that is affected by a moisture problem (the Turkish Room at Villa Medici). This geophysical instrument is able to locate and estimate the extent of water ingression, which can aid in the development of restoration plans before permanent damage occurs. The main objective of this paper is to help restorers understand the related hazards, due to the presence of moisture in the wall structures, in real-time and to rapidly and non-invasively develop strategies for the preservation of cultural heritage sites.

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Non-Destructive Corrosion Inspection of Reinforced Concrete Using Ground-Penetrating Radar: A Review

Materials ◽

10.3390/ma14040975 ◽

2021 ◽

Vol 14 (4) ◽

pp. 975

Author(s):

Ksenija Tešić ◽

Ana Baričević ◽

Marijana Serdar

Keyword(s):

Reinforced Concrete ◽

Ground Penetrating Radar ◽

Concrete Structures ◽

Condition Assessment ◽

Concrete Cover ◽

Corrosion Process ◽

Laboratory Studies ◽

Corrosion Assessment ◽

Ground Penetrating ◽

Non Destructive

Reduced maintenance costs of concrete structures can be ensured by efficient and comprehensive condition assessment. Ground-penetrating radar (GPR) has been widely used in the condition assessment of reinforced concrete structures and it provides completely non-destructive results in real-time. It is mainly used for locating reinforcement and determining concrete cover thickness. More recently, research has focused on the possibility of using GPR for reinforcement corrosion assessment. In this paper, an overview of the application of GPR in corrosion assessment of concrete is presented. A literature search and study selection methodology were used to identify the relevant studies. First, the laboratory studies are shown. After that, the studies for the application on real structures are presented. The results have shown that the laboratory studies have not fully illuminated the influence of the corrosion process on the GPR signal. Also, no clear relationship was reported between the results of the laboratory studies and the on-site inspection. Although the GPR has a long history in the condition assessment of structures, it needs more laboratory investigations to clarify the influence of the corrosion process on the GPR signal.

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Analysis of soil moisture detection using ground penetrating radar

2014 International Conference on Computer, Communications, and Control Technology (I4CT) ◽

10.1109/i4ct.2014.6914164 ◽

2014 ◽

Author(s):

R. Mardeni ◽

N. N. Ahmad ◽

C.W. Yap

Keyword(s):

Soil Moisture ◽

Ground Penetrating Radar ◽

Moisture Detection ◽

Ground Penetrating

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REFLECTION COEFFICIENT OF AN ELECTROMAGNETIC WAVE IN CONDUCTIVE MEDIA

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2018-1-100-106 ◽

2018 ◽

pp. 100-106

Author(s):

M. S. Sudakova ◽

M. L. Vladov ◽

M. R. Sadurtdinov

Keyword(s):

Reflection Coefficient ◽

Ground Penetrating Radar ◽

Electromagnetic Waves ◽

Water Contamination ◽

Survey Design ◽

Direct And Inverse Problems ◽

The Difference ◽

Ground Penetrating ◽

Ideal Dielectric

Within the ground penetrating radar bandwidth the medium is considered to be an ideal dielectric, which is not always true. Electromagnetic waves reflection coefficient conductivity dependence showed a significant role of the difference in conductivity in reflection strength. It was confirmed by physical modeling. Conductivity of geological media should be taken into account when solving direct and inverse problems, survey design planning, etc. Ground penetrating radar can be used to solve the problem of mapping of halocline or determine water contamination.

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Deteksi Bentuk Objek Bawah Tanah Menggunakan Pengolahan Citra B-Scan pada Ground Penetrating Radar (GPR)

TELKA - Telekomunikasi Elektronika Komputasi dan Kontrol ◽

10.15575/telka.v3i1.54 ◽

2017 ◽

Vol 3 (1) ◽

pp. 73-83

Author(s):

Rahmayati Alindra ◽

Heroe Wijanto ◽

Koredianto Usman

Keyword(s):

Signal Processing ◽

Ground Penetrating Radar ◽

Post Processing ◽

Data Survey ◽

Ground Penetrating

Ground Penetrating Radar (GPR) adalah salah satu jenis radar yang digunakan untuk menyelidiki kondisi di bawah permukaan tanah tanpa harus menggali dan merusak tanah. Sistem GPR terdiri atas pengirim (transmitter), yaitu antena yang terhubung ke generator sinyal dan bagian penerima (receiver), yaitu antena yang terhubung ke LNA dan ADC yang kemudian terhubung ke unit pengolahan data hasil survey serta display sebagai tampilan output-nya dan post processing untuk alat bantu mendapatkan informasi mengenai suatu objek. GPR bekerja dengan cara memancarkan gelombang elektromagnetik ke dalam tanah dan menerima sinyal yang dipantulkan oleh objek-objek di bawah permukaan tanah. Sinyal yang diterima kemudian diolah pada bagian signal processing dengan tujuan untuk menghasilkan gambaran kondisi di bawah permukaan tanah yang dapat dengan mudah dibaca dan diinterpretasikan oleh user. Signal processing sendiri terdiri dari beberapa tahap yaitu A-Scan yang meliputi perbaikan sinyal dan pendektesian objek satu dimensi, B-Scan untuk pemrosesan data dua dimensi dan C-Scan untuk pemrosesan data tiga dimensi. Metode yang digunakan pada pemrosesan B-Scan salah satunya adalah dengan teknik pemrosesan citra. Dengan pemrosesan citra, data survey B-scan diolah untuk didapatkan informasi mengenai objek. Pada penelitian ini, diterapkan teori gradien garis pada pemrosesan citra B-scan untuk menentukan bentuk dua dimensi dari objek bawah tanah yaitu persegi, segitiga atau lingkaran.

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