Impact Moderation of Power Transmission Lines on the Environment by the Shielding of Trees

Zhou, Hongwei; Ma, Ling; Sun, Lin; Zhou, Hongjv; Liu, Desheng; Cai, Liping

doi:10.15376/biores.13.4.8239-8250

Cited by 2 publications

(3 citation statements)

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“…In the formula 1 = √( − ) 2 + 2 , 2 = √( − V ) 2 + 2 , c is the propagation speed of electromagnetic waves in vacuum, is the relative dielectric constant of the background medium (assuming that the polymer-modified wood material is uniform and isotropic) [21,22], and is the time constant. The calculation process is equivalent to focus at each point ( , ).…”

Section: Methodsmentioning

confidence: 99%

Imaging of Internal Defects of Polymer-Modified Wood Using Total Focusing Method

Sun

Zhou

Jiao

et al. 2019

Advances in Polymer Technology

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Polymer modification can improve the stability and corrosion resistance of wood, but it could create defects inside wood during the modification processing. Detection of defects inside polymer-modified wood can reduce wood losses and prevent the occurring of defects. Data simulation and tomographic imaging of polymer-modified wood internal defects were carried out using electromagnetic waves with nondestructive testing. This study constructed the polymer-modified wood models, simulated the electromagnetic scattering wave, and used the total focusing method to perform tomography of the defects in the polymer-modified wood. By analyzing the imaging characteristics of different types of defects, the effectiveness of electromagnetic waves in the detection of internal defects of polymer-modified wood was proved. This method can be extended to test internal defects of other high molecular polymers.

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Section: Methodsmentioning

confidence: 99%

Imaging of Internal Defects of Polymer-Modified Wood Using Total Focusing Method

Sun

Zhou

Jiao

et al. 2019

Advances in Polymer Technology

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“…analyses in previous studies used simple-shaped tree models that ignored the detailed shapes of the branches and leaves. For example, [3] used a sphere or cylinder, [4] used an ellipsoid with a cylinder, and [5] used a combination of a sphere, truncated cone, and cylinder to approximate the tree shape. However, when these simple-shaped tree models were used, the electric field shielding effect could not be accurately calculated.…”

Section: Journal Of Advanced Simulation In Science and Engineeringmentioning

confidence: 99%

“…However, trees under power lines shield the human body from the electric field, and the electrostatically induced current flowing through the human body is also reduced. The shielding effect of trees has been widely investigated through both measurements and numerical analyses [1,3,4,5]. However, numerical…”

Section: Introductionmentioning

confidence: 99%

Calculation of electrostatically induced steady-state current flowing through human body near a tree under power transmission lines

Tanaka,

Hamada

2024

JASSE

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Trees under power transmission lines effectively shield the human body from electric field exposure. We numerically analyze the electrostatically induced steady-state current that flows through the human body near a tree under three-phase transmission lines and quantitatively investigate the reduction ratio (RR) of the induced current owing to the tree. Stochastic tree models that consider the detailed shapes of branches and leaves are created by controlling the growth direction of the branches using random numbers. Moreover, we create simpleshaped tree models with dimensions similar to those of the stochastic tree models. Comparison of induced currents and RRs calculated using these tree models confirms that the simple-shaped tree model tends to overestimate the RR.

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Impact Moderation of Power Transmission Lines on the Environment by the Shielding of Trees

Cited by 2 publications

References 0 publications

Imaging of Internal Defects of Polymer-Modified Wood Using Total Focusing Method

Imaging of Internal Defects of Polymer-Modified Wood Using Total Focusing Method

Calculation of electrostatically induced steady-state current flowing through human body near a tree under power transmission lines

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