Inspection and Imaging of Tree Trunk Defects Using GPR Multifrequency Full-Waveform Dual-Parameter Inversion

Feng, Deshan; Liu, Yuxin; Wang, Xun; Zhang, Bin; Ding, Siyuan; Yu, Tianxiao; Li, Bingchao; Zheng, Feng

doi:10.1109/tgrs.2023.3244946

Cited by 13 publications

(5 citation statements)

References 52 publications

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“…The satellite data investigations were complemented with close range analyses, including 3d photogrammetrical modelling [5] and infrared thermography (IRT), performed using drone and ground penetrating radar (GPR) prospection [6]. Some example are shown in Figure 5 and 6.…”

Section: Resultsmentioning

confidence: 99%

From Space to Tree: multisensor and multiscale remote sensing based approach for monitoring monumental trees. The case of archaeological park of Colosseum in Rome. Preliminary results

Masini,

Strano,

Fiorentino

et al. 2023

Proceedings of the 2022 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage

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The paper deals with a multi-scale, multisensor remote sensing approach ("from space to tree") based on the integration of Big satellite data analysis and proximal imaging sensing technologies ((thermal infrared camera, georadar, LiDAR) with the aim to support the management of historical and archaeological parks with a focus on: (i) analysing the health and changes in the tree, some of them affected by Toumeyella parvicornis;(ii) assessing the biomechanical stability of monumental trees; (iii) identifying critical issues at the vegetation-monument interface areas. The Colosseum Park in Rome is one of the 'scenarios-laboratories' selected for technology experimentation. The obtained results are the following: (i) the integration between the diverse sensors, in a multi-scalar perspective, combined with the knowledge of the end user's needs and application goals, leads to an improvement in the operability of the technologies; ii) in the case of the Colosseum, the minimum monitoring unit, using Sentinel 2, is the single tree; (iii) removing seasonality helps to better discriminate between healthy and diseased trees; (iv) the best period to identify the effects of Toumeyella parvicornis is Spring, especially May-June.

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Section: Resultsmentioning

confidence: 99%

From Space to Tree: multisensor and multiscale remote sensing based approach for monitoring monumental trees. The case of archaeological park of Colosseum in Rome. Preliminary results

Masini,

Strano,

Fiorentino

et al. 2023

Proceedings of the 2022 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage

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“…While having found some applications for concrete members [101][102][103], the use of FWI to study timber structures is not common owing to the complex nature of wood, which makes it difficult to model the ultrasonic wave propagation accurately and to obtain reliable inversion results. However, in a recent article [104], a GPR multifrequency FWI algorithm is considered both permittivity and conductivity to aid in tree protection and restoration, particularly in detecting trunk defects. The method utilized total-variation (TV) regularization and surface-coupled commercial GPR common-offset data.…”

Section: Full Waveform Inversion Imagingmentioning

confidence: 99%

Imaging of Structural Timber Based on In Situ Radar and Ultrasonic Wave Measurements: A Review of the State-of-the-Art

Pahnabi,

Schumacher,

Sinha

2024

Sensors

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With the rapidly growing interest in using structural timber, a need exists to inspect and assess these structures using non-destructive testing (NDT). This review article summarizes NDT methods for wood inspection. After an overview of the most important NDT methods currently used, a detailed review of Ground Penetrating Radar (GPR) and Ultrasonic Testing (UST) is presented. These two techniques can be applied in situ and produce useful visual representations for quantitative assessments and damage detection. With its commercial availability and portability, GPR can help rapidly identify critical features such as moisture, voids, and metal connectors in wood structures. UST, which effectively detects deep cracks, delaminations, and variations in ultrasonic wave velocity related to moisture content, complements GPR’s capabilities. The non-destructive nature of both techniques preserves the structural integrity of timber, enabling thorough assessments without compromising integrity and durability. Techniques such as the Synthetic Aperture Focusing Technique (SAFT) and Total Focusing Method (TFM) allow for reconstructing images that an inspector can readily interpret for quantitative assessment. The development of new sensors, instruments, and analysis techniques has continued to improve the application of GPR and UST on wood. However, due to the hon-homogeneous anisotropic properties of this complex material, challenges remain to quantify defects and characterize inclusions reliably and accurately. By integrating advanced imaging algorithms that consider the material’s complex properties, combining measurements with simulations, and employing machine learning techniques, the implementation and application of GPR and UST imaging and damage detection for wood structures can be further advanced.

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“…Different from conventional GPR detection, tree trunk detection uses GPR to detect along the outer barks of tree trunks as shown in Figure 1a, which makes the distortion of the reflection a hyperbolic shape [36]. It indicates that low-quality GPR data caused by irregular trunk shape and source dislocation should be taken into account.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Quantitative Evaluation for the Internal Defects of Tree Trunks Based on the Wavefield Reconstruction Inversion Using Ground Penetrating Radar Data

Feng

Liu

Wang

et al. 2023

Forests

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A reliable inspection of the tree trunk internal defects is often considered vital in the health condition assessment for the living tree. There has been a desire to reconstruct the internal structure quantitatively using a non-destructive testing technology. This paper intends to apply wavefield reconstruction inversion (WRI) to obtain high-precision information from tree trunk detection using ground penetrating radar data. The variational projection method and the grouped multi-frequency strategy are adopted to strengthen the algorithm stability and adaptability by inverting frequency components sequentially. Through an irregular trunk model test, the influence of the penalty parameter, initial model, frequency strategy, and grid generation methods are investigated on WRI. Additionally, the comparison between full waveform inversion and WRI is discussed in detail. This synthetic case indicates that WRI is efficient and for a reasonable result, a proper multi-frequency strategy and an accurate mesh closer to reality are important. Furthermore, a field case of a historical tree is used to prove the validity and reliability of the algorithm. The success in this case indicates that our algorithm can characterize the distribution of media parameters of tree trunks accurately, which could provide data support for the rejuvenation and maintenance of living trees.

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Inspection and Imaging of Tree Trunk Defects Using GPR Multifrequency Full-Waveform Dual-Parameter Inversion

Cited by 13 publications

References 52 publications

From Space to Tree: multisensor and multiscale remote sensing based approach for monitoring monumental trees. The case of archaeological park of Colosseum in Rome. Preliminary results

From Space to Tree: multisensor and multiscale remote sensing based approach for monitoring monumental trees. The case of archaeological park of Colosseum in Rome. Preliminary results

Imaging of Structural Timber Based on In Situ Radar and Ultrasonic Wave Measurements: A Review of the State-of-the-Art

Quantitative Evaluation for the Internal Defects of Tree Trunks Based on the Wavefield Reconstruction Inversion Using Ground Penetrating Radar Data

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