scholarly journals Development of a Novel Guided Wave Generation System Using a Giant Magnetostrictive Actuator for Nondestructive Evaluation

Sensors ◽  
2018 ◽  
Vol 18 (3) ◽  
pp. 779 ◽  
Author(s):  
Mingzhang Luo ◽  
Weijie Li ◽  
Junming Wang ◽  
Ning Wang ◽  
Xuemin Chen ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Wave Generation ◽  
Guided Wave ◽  
Generation System ◽  
Magnetostrictive Actuator

scholarly journals Signal Strength Enhancement of Magnetostrictive Patch Transducers for Guided Wave Inspection by Magnetic Circuit Optimization

2019 ◽  
Vol 9 (7) ◽  
pp. 1477 ◽  
Author(s):  
Jianjun Wu ◽  
Zhifeng Tang ◽  
Keji Yang ◽  
Fuzai Lv
Keyword(s):  
Magnetic Field ◽  
Magnetic Circuit ◽  
Energy Conversion Efficiency ◽  
Wave Generation ◽  
Guided Wave ◽  
Shear Mode ◽  
Circuit Optimization ◽  
Affecting Factors ◽  
Long Distance ◽  
Dynamic Magnetic Field

Magnetostrictive patch transducers (MPT) with planar coils are ideal candidates for shear mode generation and detection in pipe and plate inspection with the advantages of flexibility, lightness and good directivity. However, the low energy conversion efficiency limits the application of the MPT in long distance inspection. In this article, a method for the enhancement of the MPT was proposed by dynamic magnetic field optimization using a soft magnetic patch (SMP). The SMP can reduce the magnetic resistance of the magnetic circuit, which increases the dynamic magnetic field intensity in the magnetostrictive patch during wave generation and restricts the induced dynamic magnetic field within the area around the coils for sensing during wave detection. Numerical simulations carried out at different frequencies verified the improvement of the dynamic magnetic fields by the SMP and influence of different affecting factors. The experimental validations of the signal enhancement in wave generation and detection were performed in an aluminum plate. The amplitude magnification could reach 12.7 dB when the MPTs were covered by the SMPs. Based on the numerical and experimental results, the SMP with a large relative permeability and thickness and close fitting between the SMP and coils were recommended when other application conditions were met.

Integrated guided wave generation and sensing using a single laser source and optical fibers

2010 ◽  
Vol 21 (10) ◽  
pp. 105207 ◽  
Author(s):  
Hyeonseok Lee ◽  
Hyun-Jun Park ◽  
Hoon Sohn ◽  
Il-Bum Kwon
Keyword(s):  
Optical Fibers ◽  
Wave Generation ◽  
Guided Wave ◽  
Laser Source ◽  
Single Laser

Guided Wave Generation and Sensing in an Elastic Beam Using MFC Piezoelectric Elements: Theory and Experiment

2010 ◽  
Vol 21 (16) ◽  
pp. 1617-1625 ◽  
Author(s):  
Evgeny Glushkov ◽  
Natalia Glushkova ◽  
Oleg Kvasha ◽  
Dominik Kern ◽  
Wolfgang Seemann
Keyword(s):  
Elastic Beam ◽  
Wave Generation ◽  
Guided Wave ◽  
Piezoelectric Elements ◽  
Theory And Experiment

scholarly journals A Microcomputer-Based Wave Generation System

1985 ◽  
Vol 18 (9) ◽  
pp. 111-115
Author(s):  
Zhang Quan ◽  
Zhao Jing ◽  
Pei Run ◽  
Lan Pusen
Keyword(s):  
Wave Generation ◽  
Generation System

Development of Wave-Generation System For Lighted Buoy

2016 ◽  
Vol 3 (3) ◽  
pp. 141-146
Author(s):  
Soo-Yeol Park ◽  
◽  
Byung-Yeon Won ◽  
Keum-Soo Yeo ◽  
Chang-Hwan Ji ◽  
...  
Keyword(s):  
Wave Generation ◽  
Generation System
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