Internal Defect Detection in Standing Timber Based on Microwave Tomography

Meirong Wu; Liming Wang; Xingcheng Han; Xiuli Luo

doi:10.3788/LOP202158.0211003

Laser & Optoelectronics Progress, Volume. 58, Issue 2, 0211003(2021)

Internal Defect Detection in Standing Timber Based on Microwave Tomography

Meirong Wu, Liming Wang^*, Xingcheng Han, and Xiuli Luo

Shanxi Key Laboratory of Information Detection and Processing, College of Information and Communication Engineering, North University of China, Taiyuan, Shanxi 030051, China

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Figures & Tables(8)

Fig. 1. Concept map of MWT system

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Fig. 2. Framework of MWT system simulation modeling

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Fig. 3. Antenna array and MWT system

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Fig. 4. Electric field with frequency of 1 GHz

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Fig. 5. Healthy trunk model and reconstruction result. (a) Trunk model; (b) reconstruction result

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Fig. 6. Decayed trunk models and reconstruction results. (a) Decayed trunk model; (b) reconstruction result of decayed tree trunk; (c) decayed and hollow trunk model; (d) reconstruction result of decayed and hollow trunk

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Table 1. Dielectric properties, conductivity and modeling parameters of wood ^[2]
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Table 1. Dielectric properties, conductivity and modeling parameters of wood ^[2]
Layer ε_r σ /(S·m^-1) Thickness /m
Air layer 1 0 0.45
Bark layer 5 0.0015 0.05
Sapwood layer 11 0.0012 0.05
Core layer 13 0.0010 0.10
Decay layer 17 0.0200 0.05

Table 2. MSSIM of reconstructed image
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Table 2. MSSIM of reconstructed image
Type Healthy trunk Decayed trunk Decayed and hollow trunk
MSSIM 0.4921 0.4328 0.4068

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Meirong Wu, Liming Wang, Xingcheng Han, Xiuli Luo. Internal Defect Detection in Standing Timber Based on Microwave Tomography[J]. Laser & Optoelectronics Progress, 2021, 58(2): 0211003

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Paper Information

Category: Imaging Systems

Received: Jun. 12, 2020

Accepted: Jul. 17, 2020

Published Online: Jan. 8, 2021

The Author Email: Liming Wang (wlm@nuc.edu.cn)

DOI:10.3788/LOP202158.0211003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Dielectric properties, conductivity and modeling parameters of wood [2]

Table 1. Dielectric properties, conductivity and modeling parameters of wood [2]

Table 2. MSSIM of reconstructed image

Table 2. MSSIM of reconstructed image

Table 1. Dielectric properties, conductivity and modeling parameters of wood ^[2]

Table 1. Dielectric properties, conductivity and modeling parameters of wood ^[2]