An innovative tomographic technique integrated with acoustic-laser approach for detecting defects in tree trunk

Qiu, Qiwen; Qin, Renyuan; Lam, Josh H. M.; Tang, Alvin M. C.; Leung, Mike W. K.; Lau, Denvid

doi:10.1016/j.compag.2018.11.017

Cited by 33 publications

(15 citation statements)

References 24 publications

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“…This is a well-established tool for the assessment of a tree's structural soundness, with numerous studies over the past 20 years testing its application under various conditions. Many research teams have confirmed the effectiveness of acoustic tomography in detecting tree decay [43][44][45][46][47][48][49][50]. At the beginning of the 21st century, research was conducted on the health condition of urban trees using various research methods (electrical and acoustic tomography and GPR), achieving various degrees of success with them.…”

Section: Discussion-tomograph As a Tool Supporting The Management Of Historical Greenerymentioning

confidence: 99%

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Dudkiewicz

Durlak

2021

Sustainability

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This manuscript summarizes the process by which large trees are protected in Poland, how they gain protected status, and the use of acoustic tomography to assess the structural soundness of five individual trees. The authors discuss tree stressors and tree care options, and how the outcome of each assessment was used in the decision-making process. Moreover, the use of acoustic tomography as an assessment tool helps to gain public acceptance for the assessment. In sustainable development, there is talk of the conscious management of urban vegetation, and specifically tree populations in the city. In line with sustainable development, actions are taken to manage the existing natural resources, e.g., historic trees, properly. Thanks to using an acoustic tomograph, it is possible to diagnose old tree specimens, take care of the safety of people and property near the natural monument, and to test candidates for their eligibility as monuments. Thanks to the research presented, it was ordered that one poplar tree be left and observed in Lublin, that two linden trees be cut down in Sandomierz and Lublin, that arborist works consisting of lowering the height of a linden tree in Sandomierz be undertaken, and that monument protection be applied for an ash tree in Łęczna. A visual tree assessment (VTA) was the starting point for this research. Each of the trees could endanger the safety of site users, and the diagnostics performed using sound waves were crucial in assessing their health condition. Our results highlight that acoustic tomography is an essential diagnostic method applicable to trees belonging to cultural heritage, such as old trees, and is effective in preventive tree management through the monitoring of mid- to long-term changes in internal decay or cavities that are difficult to diagnose with the naked eye.

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Section: Discussion-tomograph As a Tool Supporting The Management Of Historical Greenerymentioning

confidence: 99%

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Dudkiewicz

Durlak

2021

Sustainability

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“…To prevent this from happening, many non-destructive testing (NDT) technologies have great potential for promoting the accuracy and efficiency of aluminum window defects inspection. NDT technologies are strategic procedures for gathering information on structure conditions and existing damage and defining adequate remedial measures; they have a powerful ability to assess health state in a non-invasive manner [ 14 , 15 , 16 ]. These advanced NDT technologies include ultrasonic thickness measurement technology, ultrasonic guided wave inspection, and active infrared thermographic inspection.…”

Section: Introductionmentioning

confidence: 99%

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

2022

Self Cite

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Aluminum windows are crucial components of building envelopes since they connect the indoor space to the external environment. Various external causes degrade or harm the functioning of aluminum windows. In this regard, inspecting the performance of aluminum windows is a necessary task to keep buildings healthy. This review illustrates the deterioration mechanisms of aluminum windows under various environmental conditions with an intention to provide comprehensive information for developing damage protection and inspection technologies. The illustrations reveal that moisture and chloride ions have the most detrimental effect on deteriorating aluminum windows in the long run, while mechanical loads can damage aluminum windows in a sudden manner. In addition, multiple advanced inspection techniques potential to benefit assessing aluminum window health state are discussed in order to help tackle the efficiency problem of traditional visual inspection. The comparison among those techniques demonstrates that infrared thermography can help acquire a preliminary defect profile of inspected windows, whereas ultrasonic phased arrays technology demonstrates a high level of competency in analyzing comprehensive defect information. This review also discusses the challenges in the scarcity of nanoscale corrosion information for insightful understandings of aluminum window corrosion and reliable window inspection tools for lifespan prediction. In this regard, molecular dynamics simulation and artificial intelligence technology are recommended as promising tools for better revealing the deterioration mechanisms and advancing inspection techniques, respectively, for future directions. It is envisioned that this paper will help upgrade the aluminum window inspection scheme and contribute to driving the construction of intelligent and safe cities.

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“…The results showed that the proposed algorithm not only can better reflect internal wood defects qualitatively and quantitatively, but also it has a high quality of reconstructed images. Qiu et al (2019) developed a tomographic technique based on the use of both stress wave and electromagnetic wave for evaluating the defects in tree trunk, the result indicated that the internal air hole and the air gap located within 5 to 20 mm below the tree surface can be effectively detected and quantified.…”

Section: Introductionmentioning

confidence: 99%

Propagation velocity model and two-dimensional defect imaging of stress wave in larch (Larix gmelinii) wood

Wei

Sun

et al. 2021

BioRes

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The propagation law of stress wave in larch (Larix gmelinii) wood was studied in this work. External factors affecting the propagation velocity of stress wave in wood cross-section were studied using the orthogonal experiment method. The most influential factors were shown by the experimental results, and the parameters of the propagation velocity model of stress wave in larch wood were optimized. Based on the optimized propagation velocity model, combined with the traditional defect determination method, a twelve-directional stack imaging (TDSI) steps system was developed for larch wood internal defect detection. The analysis results showed that of the three external factors of temperature, moisture content, and illumination duration, temperature had the greatest influence on the propagation velocity model of stress wave in larch wood cross-section. Using TDSI to image the defective larch wood not only can locate the defective area, but also it can achieve a high imaging precision of 95.52%, and the imaging precision is unrelated to the location of the defect, which has a good quantitative defect detection effect.

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An innovative tomographic technique integrated with acoustic-laser approach for detecting defects in tree trunk

Cited by 33 publications

References 24 publications

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Sustainable Management of Very Large Trees with the Use of Acoustic Tomography

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

Propagation velocity model and two-dimensional defect imaging of stress wave in larch (Larix gmelinii) wood

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