Detection of Internal Cracks in Square Billets Using Time of Flight of Longitudinal Waves
スポンサーリンク
概要
- 論文の詳細を見る
We propose a method for the reconstruction of internal cracks using time of flight (TOF) of longitudinal waves. Since the longitudinal wave is the fastest elastic wave, it is possible to reconstruct cracks using a matrix method with apparent sound velocities calculated from the TOF. This method can neglect mode transformation and other waves because the first wave received is always the longitudinal wave. In addition, this method has the potential to be free from a blind sector and to detect the cracks precisely, because it is a transmission method and uses time domain analysis. We simulate crack detection using the transmission-line matrix (TLM) method. This proposed method detects cracks regardless of their location, direction, and number. It was also possible to detect the cracks when their length was smaller than the wavelength or when the billet had some error in its shape. This technique is expected to be useful for ultrasonic testing.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2009-07-25
著者
-
Mizutani Koichi
Graduate School Of Systems And Information Engineering Univ. Of Tsukuba
-
Mitsui Hideto
Graduate School Of Systems And Information Engineering University Of Tsukuba
-
Wakatsuki Naoto
Graduate School Of Systems And Information Engineering University Of Tsukuba
-
Mizutani Koichi
Graduate School of System and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
関連論文
- Acoustic Beam Scanning Using Annular Transducer Array Introducing Decentering Operation(Advanced Technology of Vibration and Sound)
- 205 SCANNING OF ACOUSTIC BEAM USING DECENTERING OPERATION FOR ANNULAR TRANSDUCER ARRAY(O.S.4 Measurement and Sensor I)
- Effect of decentering ratio of elements in a variable radiation direction sound source on beam profile
- P3-45 Reconstruction of Vibrating Surface of Ultrasonic Transducer Using O-CT and Acoustical Holography(Poster session 3)
- P3-4 Measuring Sound Fields in Air by Michelson Interferometer(Poster session 3)
- P2-4 Propagation Characteristics of Negative Group Velocity of Lamb-type Waves in a Glass-Water-Glass Layer(Poster session 2)
- Numerical Analysis of Piezoelectric Sensor Using Multimode Vibration for Liquid Density and Viscosity Measurement
- Monolithic Piezoelectric Sensor for Measurement of Triaxial Forces Applied to Bridge by String Vibration
- Design for Underwater Aplanatic Straubel Acoustic Mirror
- Experimental Study on Measurement of Acoustic Cavitation Bubbles in Spatial Frequency Domain Using Optical Spectrometer
- A Method for Estimating the Location of the Drill-Bit During Horizontal Directional Drilling Using a Giant-Magnetostrictive Vibrator
- Design for Underwater Aplanatic Acoustic Mirror
- Flow Velocity Measurement Using an Orthogonally Radiated Ultrasonic Beam
- Optical visualization of coupling modes of leaky Lamb waves with negative group velocity in the solid/fluid/solid trilayer
- P2-15 Correlation Characteristic Improvement of Sound Probe Using Inverse Problem(Short oral presentation for posters)
- P2-13 Temperature Measurement Using Network Controlled Acoustic Sensors(Short oral presentation for posters)
- Precise Wireless Triggering System for Anemometers with Long-Baseline Acoustic Probes
- Underground Imaging Method Using Magnified Cross-Correlation Analysis
- Detection of Underground Concrete Block Using Giant-Magnetostriction Vibrator Applying Magnified Cross-Correlation Analysis
- Ultrasonic Fog Detector for Greenhouse with Evaporative Fog Cooling System
- Artifact Reduction in Tomographic Images for Nondestructive Testing of Square Billets Using Ultrasonic Computerized Tomography
- P2-11 Simple Ultrasonic Anemometer Using a Bended Sound Probe(Short oral presentation for posters)
- Locality of Area Coverage on Digital Acoustic Communication in Air using Differential Phase Shift Keying
- Measurement of Vertical Temperature Distribution Using a Single Pair of Loudspeaker and Microphone with Acoustic Reflection
- Fluctuation of Long-Distance Sound Propagation in the Central Pacific
- Investigation of Thermal Conductivity and Heat Characteristics of Oil Sands Using Ultrasound Irradiation for Shortening the Preheating Time (Special Issue : Ultrasonic Electronics)
- Ultrasonic Measurement System for Detecting Penetration of Boulders by Autocorrelation Analysis
- Simulation of Internal Crack Detection in Shape-Distorted Cast Billets Using Time-of-Flight Measurements of Longitudinal Ultrasonic Waves
- Estimation of Sound Velocity Distribution Using Sectional Near-Field Acoustical Holography and Global Search
- Temperature Distribution Estimated by Optimization and Near-Field Acoustical Holography
- Artifact Reduction in Tomographic Images for Nondestructive Testing of Square Billets Using Ultrasonic Computerized Tomography
- Temperature Measurement Using Acoustic Reflectors
- Basic Study of Orthogonal Signal Division Multiplexing for Underwater Acoustic Communication: A Comparative Study
- Micrometeorology Measurement by Acoustic Method
- Differential Phase Shift Keying Acoustic Communication in Air for Low-Signal-to-Noise Ratio Environment
- Temperature Distribution Measurement with Acoustic Computerized Tomography Using Rectangular Arrangement of Transducers
- Defect Detection in Square Billet Using Time-of-Flight of Longitudinal Waves
- Reconstruction of Three-Dimensional Sound Field from Two-Dimensional Sound Field Using Optical Computerized Tomography and Near-Field Acoustical Holography
- Directional Trimming of Radiated Ultrasonic Beam Using Decentered Annular Transducer Array
- Indirect Measurement of Vibrating Surface of Ultrasonic Transducer Using Optical Computerized Tomography and Acoustical Holography
- Direction-Variable Beam by Decentered Annular Array Sound Source with Rounded Width of Elements
- Effect of Decentering Ratio Fluctuation of Annular Array Element in Direction-Variable Type Sound Sources
- Optimal Transducer Arrangement for Temperature Distribution Measurement in Arbitrary Convex-Shaped Space by Acoustic Computerized Tomography
- Temperature Distribution Measurement Using Reflection with Acoustic Computerized Tomography
- Measurement of Sound Fields Using Mach–Zehnder Interferometer
- Visualization of Mode Conversion of Lamb-Type Waves in Glass Plates Using Pulsed Light Source
- Chip-Interleaved Multiple Access for Underwater Acoustic Communication and Its Performance Evaluation in Propagation Simulation
- Measurements of Wind Velocity and Direction Using Acoustic Reflection against Wall
- Phase Shift Keying Acoustic Communication in Air with Impulse Response
- Detection of Internal Cracks in Square Billets Using Time of Flight of Longitudinal Waves
- Design for Aplanatic Fresnel Acoustic Lens for Underwater Imaging
- Error Analysis for Micrometeorological Measurements Using Bidirectional Sound Probe with Long Baseline in Wind Fields
- Noncontact Measurement of Humidity and Temperature Using Airborne Ultrasound
- Two-Axis Anemometer with Acoustic Reflector Using Single Pair of Loudspeaker and Microphone
- Temperature Dependence of Parametric Phenomenon in Airborne Ultrasound for Temperature Measurement
- Design for an Aspherical Acoustic Fresnel Lens with Phase Continuity
- Variation in Cutoff Effect and Sound Field Caused by Geometrical Structures near the Coast
- Relationships between Existence of Negative Group Velocity and Physical Parameters of Materials for Lamb-Type Waves in Solid/Liquid/Solid Structure
- Negative Group Velocities of Lamb-Type Waves in a Glass/Water/Glass Structure Controlled by the Thickness of Water Layer
- Air Temperature Distribution Measurement Using Asynchronous-Type Sound Probe
- Association between Phase Modulation and Waveform on Phase Information Transmission by Phase Conjugate Wave
- A Simple Technique for Realizing an Ultrasonic Anemometer Using a Loudspeaker
- Optical Computerized Tomography for Visualization of Ultrasonic Fields Using Michelson Interferometer
- Fundamental Study on Inspection of Steel Pipe Covered with Insulator in Oil Complex
- Acoustic Communication in Air Using Differential Biphase Shift Keying with Influence of Impulse Response and Background Noise
- Measurement of Temperature Distribution Using Acoustic Reflector Array