International
2017.01.16 10:59
Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement
댓글 0조회 수 168223추천 수 0
Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement
http://aip.scitation.org/doi/abs/10.1063/1.4940513
Experimental comparison of nonlinear parameters obtained from absolute measurement and relative measurement
Jongbeom Kim1b), , Dong-Gi Song1c), , and Kyung-Young Jhang2a),
View Affiliations
ABSTRACT
The second-order ultrasonic nonlinear parameter β is obtained from the displacement of fundamental and second-harmonic frequency components, so it needs to measure the absolute displacement of fundamental and second-harmonic frequency components. However, the displacement of high-frequency harmonic component is not easily measured because that is very weak. Therefore, many researchers have measured a relative ultrasonic nonlinear parameter β` using the detected signal instead of measuring absolute displacement. The parameter β` is more convenient than measuring the parameter β, which is effective to compare before and after damage of a material; however, the parameter β` has never been verified in comparison with absolute ultrasonic nonlinear parameter. This study compares the relative parameter with the absolute parameter, and we make it clear that the fractional ratio of the relative parameters is identical to that of the absolute parameters when the detected signal amplitude is linearly proportional to the actual displacement amplitude. For the experimental verification, the absolute and the relative parameters were measured for two different materials, fused silica and Al6061-T6. The experimental results showed that the ratio of absolute parameters and that of relative parameters were in good agreement.
-
Thermal damages on the surface of a silicon wafer induced by a near-infrared laser
Date2014.09.29 CategoryInternational Views638377 -
Analysis of the influence of surface roughness on measurement of ultrasonic nonlinearity parameter using contact-type transducer
Date2021.08.25 CategoryInternational Views506873 -
Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter
Date2017.01.16 CategoryInternational Views303159 -
Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime
Date2015.09.16 CategoryInternational Views282746 -
Real-time detection of surface cracks on silicon wafers during laser beam irradiation
Date2015.09.16 CategoryInternational Views249595 -
Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic
Date2015.09.16 CategoryInternational Views232728 -
Feasibility of MFC (Macro-Fiber Composite) Transducers for Guided Wave Technique
Date2014.09.29 CategoryDomestic Views222821 -
Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter
Date2017.01.16 CategoryInternational Views207949 -
Evaluation of Ultrasonic Nonlinear Characteristics in Heat-Treated Aluminum Alloy (Al-Mg-Si-Cu)
Date2014.03.05 CategoryInternational Views191766 -
Imaging of Harmonic Wave Generated by Contact Acoustic Nonlinearity in Obliquely Incident Ultrasonic Wave
Date2014.03.05 CategoryDomestic Views191740 -
Surface characteristics of aluminum 6061-T6 subjected to Nd:YAG pulsed-laser irradiation
Date2012.06.21 CategoryInternational Views187717 -
Non-contact Single-Mode Guided Wave Technique by the Combination of Wavelength-Matched Laser Generation and Angle-Matched Leak Wave Detection
Date2012.05.03 CategoryInternational Views183064 -
Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement
Date2017.01.16 CategoryInternational Views168223 -
Finite Difference Method Analysis of Ultrasonic Nonlinearity in Partially Degraded Material
Date2012.05.03 CategoryInternational Views160409 -
Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy
Date2015.09.16 CategoryInternational Views160169 -
Fatigue-induced microdamage characterization of stainless steel 316L using innovative nonlinear acoustics
Date2012.06.21 CategoryInternational Views148392 -
Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System
Date2015.09.16 CategoryInternational Views147751 -
Single-mode guided wave technique using ring-arrayed laser beam for thin-tube inspection
Date2012.05.03 CategoryInternational Views144532 -
모드선택성을 강화한 비접촉식 유도초음파 기술
Date2012.05.03 CategoryDomestic Views143333 -
Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers
Date2017.01.16 CategoryInternational Views140302