Article
Engineering, Electrical & Electronic
Hongyu Sun, Lisha Peng, Shen Wang, Songling Huang, Kaifeng Qu
Summary: In this work, a new frequency-mixed point-focusing SH guided-wave EMAT is proposed to accurately obtain defect positions and plate thickness simultaneously. By utilizing variational mode decomposition and continuous wavelet transform, noise can be removed and guided wave information under different frequencies and modes can be obtained, leading to improved detection accuracy and signal intensity. Additionally, a new deep learning model, GFresNet, is introduced for defect classification, showing high accuracy in identifying defects of different sizes without the need for complex feature engineering.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Electrical & Electronic
Zhaoxi Li, Danfeng Wang, Chunlong Fei, Pingying Jiang, Shuxiao Zhang, Dongdong Chen, Di Li, Chenxi Zhen, Runcong Wu, Xiao Peng, Yang Xu, Zeyu Chen, Wei Feng, Yintang Yang
Summary: A new acoustic holographic computing method is proposed, and a disc-shaped hologram with a central hole is used to achieve the required focusing effect and increased sensitivity in ultrasound applications. The transducer with the hole hologram showed lower insertion loss compared to a conventional hologram, enabling new applications of acoustic hologram in ultrasound imaging.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Zhaoxi Li, Jianxin Zhao, Chenxue Hou, Chunlong Fei, Chenxi Zheng, Lifei Lou, Dongdong Chen, Di Li, Yintang Yang
Summary: An active gradient metamaterial (AGM) based on composite structure on traditional piezoelectric materials is proposed to achieve the acoustic impedance matching and underwater acoustic focusing. The active self-focusing and broadband focusing behaviors of the AGM are demonstrated through simulation and experimental results.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Acoustics
Yunfei Zhang, Bing Li, Jiaqi Wang
Summary: This article proposes a focusing formula to describe the periodic focusing phenomenon of guided waves. This formula is of great significance for solving the fundamental problems of guided waves propagation in pipes and its applications in nondestructive evaluation. The study finds that the angular profile of guided waves varies periodically during propagation, and this period is related to the pipe radius. Experimental verification is conducted, and the results are in good agreement with theoretical predictions.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Integrative & Complementary Medicine
Geonwoo Kim, Young-In Hwang, Yeonhee Ryu, Hak-Joon Kim, Young-Min Bae, Ki-Bok Kim
Summary: This study introduced an ultrasonic moxibustion device (UMD) to overcome the disadvantages of traditional moxibustion therapy, achieving the proposed design parameters through simulation, experimentation, and performance testing. The results showed that UMD did not cause skin tissue damage during treatment, indicating its potential as a better alternative to traditional methods.
INTEGRATIVE MEDICINE RESEARCH
(2021)
Article
Chemistry, Analytical
Pengzhi Ma, Chunguang Xu, Dingguo Xiao
Summary: With the rapid development of the aerospace industry, the study proposed an ultrasonic inspection system for industrial robots with a six degree of freedom (DOF) to solve the challenge of automated NDT inspection of aero-engine blades. A defect detection model and a thickness detection method were developed based on the thickness variation of the blades, and the system was found to achieve high accuracy in defect detection and thickness measurement through quantitative analysis.
Article
Engineering, Mechanical
Xinyu Zhao, Zemin Ma, Jiaying Zhang
Summary: The advantages and limitations of the full matrix focusing method of ultrasonic phased array in Ultrasonic NDT are discussed in this paper. Two simplified matrix focusing methods, the triangular matrix focusing algorithm and the trapezoidal matrix focusing algorithm, are proposed to address the problem of time-consuming data acquisition and processing. Experimental results show that both algorithms significantly improve the imaging quality and efficiency compared to the original full matrix focusing method.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
Mohammad Javad Ranjbar Naserabadi, Sina Sodagar
Summary: This study presents an innovative experimental approach to optimize the setup parameters of phased array and enhance the detection ability of guided wave signals. Results show that commercially available phased array ultrasonic systems can generate guided wave modes, and the selected mode can detect surface and in-depth defects as small as 2 mm in diameter.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2022)
Article
Optics
Chenkai Xie, Lirong Huang, Wenbing Liu, Wei Hong, Jifei Ding, Wei Wu, Min Guo
Summary: This paper proposes an all-dielectric guided wave-driven metasurface that can convert in-plane guided modes in the waveguide into desired out-of-plane free-space modes, achieving the functions of coupling guided modes to free-space waves, bifocal metalens, and polarization demultiplexing.
Article
Acoustics
Ediguer E. Franco, Helver M. Barrera, Paulo O. Formigoni, Flavio Buiochi
Summary: This work presents a novel ultrasonic viscosity measurement device with increased sensitivity, which is based on determining the complex reflection coefficient of shear-waves at the solid-liquid interface. By replacing the flat surface at the measurement interface with a grooved surface, sensitivity is enhanced through double reflection with oblique incidence. Results show that this method is effective for measuring viscosity, as demonstrated with corn syrup-water mixtures.
Article
Physics, Applied
Soo-Ho Jo, Donghyu Lee, Heonjun Yoon, Byeng D. Youn
Summary: The integration of defect-introduced phononic crystals (PnCs) and piezoelectric materials has led to the development of new conceptual products for energy harvesting, wave filtering, and ultrasonic sensing. However, previous work has been limited to single-defect situations. This study aims to expand the PnC design space into double defects to make ultrasonic transducers useful at multiple frequencies. The study focuses on longitudinal wave generation and modifies a previous analytical model to predict the wave-generation performance under a double-defect situation. Two parametric studies analyze the effect of input voltage setting and spacing between double defects on output responses. These ultrasonic transducers have potential applications in nondestructive testing and ultrasonic imaging.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Automation & Control Systems
Hongyu Sun, Lisha Peng, Junming Lin, Shen Wang, Wei Zhao, Songling Huang
Summary: This study proposes a physics-informed deep neural network called GuwNet for accurate quantification of microcrack defects using a high-frequency, high-order shear horizontal guided wave electromagnetic acoustic transducer (EMAT). By introducing the concept of NDT physics, the poor predictive abilities of the deep neural network trained on small datasets are compensated.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2022)
Article
Physics, Applied
Takaaki Fukuchi, Takahiro Hayashi, Naoki Mori
Summary: This paper presents a stacked thin-plate region that can focus transmitted waves in a bulk medium by utilizing the dispersion nature of Lamb waves. Numerical calculations show that the incident plane wave changes its wavefront and is focused at the target due to the different phase velocities in plates with different thicknesses in the stacked region. Moreover, when a delayed longitudinal wave is applied, the preserved wavefront in the stacked plate region leads to appropriate targeting of the transmitted longitudinal wave at the desired location. Such a focusing device is valuable for phased array inspection.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Zhu Qi, Xu Duo, Zhang Yuan-Jun, Li Yu-Juan, Wang Wen, Zhang Hai-Yan
Summary: Unlike classical defects, white etching defects (WED) can cause surface spalling and significantly shorten service life. This study successfully characterizes the different evolutionary stages of WED using simulated ultrasonic inspections and microstructure variations based on Voronoi diagram. Deep learning techniques are employed to accurately recognize and evaluate WED, which is crucial for early failure prediction and residual life assessment.
ACTA PHYSICA SINICA
(2022)
Article
Acoustics
Xiangwei Geng, Chengcheng Zhang, Jian Zhang, Guoqiang Luo, Qiang Shen
Summary: This study proposes an ultrasonic method for measuring layer thicknesses in thin layered materials and compares it with a traditional method. The use of an inversion algorithm based on particle swarm optimization improves the accuracy of the measurements. Experimental results demonstrate that this method is more accurate compared to the traditional method.
Article
Materials Science, Multidisciplinary
Wisam Ali Basher Baara, B. T. Hang Tuah B. Baharudin, Mohd Khairol Anuar, Mohd Idris Shah B. Ismail
Article
Materials Science, Multidisciplinary
Shayan Dehghan, Mohd Idris Shah B. Ismail, Mohd Khairol Anuar B. Mohd Ariffin, B. T. Hang Tuah B. Baharudin
Article
Automation & Control Systems
Shayan Dehghan, M. I. S. Ismail, M. K. A. Ariffin, B. T. H. T. Baharudin
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Shayan Dehghan, Rasol Abbasi, B. T. Hang. Tuah b. Baharudin, Mohsen Loh Mousavi, Ehsan Soury
Summary: Joining dissimilar materials is always a challenging and interesting topic. This study experimentally and numerically investigated the friction drill joining technique for joining different materials and proposed a method for improving joint strength. A thermo-mechanical finite element model was developed to analyze the material behavior and mechanical properties of the process, and the significant effect of improvement conditions on joint strength and quality was found.
Article
Materials Science, Multidisciplinary
Q. Azpen, H. Baharudin, S. Sulaiman, F. Mustapha
Summary: Incremental sheet forming (ISF) is a promising alternative to traditional sheet forming processes. Heat-assisted ISF processes, particularly frictional stir-assisted single point incremental forming (SPIF), have been recommended for forming difficult materials. This study investigates the impact of process parameters on the thinning rate of AA6061-T6 sheets and finds that spindle speed is the most influential parameter.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Article
Green & Sustainable Science & Technology
Syed Radzi Bin Rahamaddulla, Zulkiflle Leman, B. T. Hang Tuah Bin Baharudin, Siti Azfanizam Ahmad
Summary: This study aims to propose a readiness assessment model tailored for small and medium enterprises to address the gaps in existing models in this field. By reviewing existing maturity assessment models, a framework incorporating 4M attributes and Industry 4.0 characteristics was proposed to help SMEs better address uncertainties in adopting this concept.
Article
Materials Science, Multidisciplinary
M. Asnawi Omar, B. T. H. T. Baharudin, S. Sulaiman, M. I. S. Ismail, M. Afian Omar
Summary: This paper discusses the application of metal additive manufacturing technology in stent manufacturing, which can meet the needs of patients through custom design, and explores the potential of MAM technology in the future field of stent manufacturing.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2021)
Article
Engineering, Mechanical
Nor Aznan Mohd Nor, B. T. H. T. Baharudin, J. A. Ghani, Z. Leman, M. K. A. Ariffin
JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES
(2020)
Proceedings Paper
Engineering, Industrial
Z. Wahid, M. K. A. M. Ariffin, B. T. H. T. Baharudin, M. I. S. Ismail, F. Mustapha
INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN INDUSTRIAL ENGINEERING AND MANUFACTURING
(2019)
Proceedings Paper
Energy & Fuels
M. K. A. Mohd Ariffin, N. A. Sukindar, B. T. H. T. Baharudin, C. N. A. Jaafar, M. I. S. Ismail
2017 INTERNATIONAL CONFERENCE ON POWER AND ENERGY ENGINEERING
(2018)
Proceedings Paper
Engineering, Aerospace
K. N. M. Tohit, N. Zulkifli, S. Sulaiman, B. T. H. T. Baharudin
INTERNATIONAL CONFERENCE ON AEROSPACE AND MECHANICAL ENGINEERING (AEROMECH17)
(2018)
Article
Engineering, Mechanical
S. Gholizadeh, Z. Leman, B. T. H. T. Baharudin, O. Inayatullah
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2018)
Review
Engineering, Multidisciplinary
Q. M. Azpen, B. T. H. T. Baharudin, S. Shamsuddin, F. Mustapha
JOURNAL OF ENGINEERING SCIENCE AND TECHNOLOGY
(2018)
Proceedings Paper
Materials Science, Multidisciplinary
Subramaniasarma Sreenivasan, Shamsuddin Sulaiman, Mohd Khairol Anuar Mohd Ariffin, B. T. Hang Tuah Baharudin, Khalina Abdan
MATERIALS TODAY-PROCEEDINGS
(2018)
