Sun et al., 2020 - Google Patents
Small electromagnetic acoustic transducer with an enhanced unique magnet configurationSun et al., 2020
View PDF- Document ID
- 11077301662255669351
- Author
- Sun H
- Urayama R
- Uchimoto T
- Takagi T
- Hashimoto M
- Publication year
- Publication venue
- NDT & E International
External Links
Snippet
We describe a small electromagnetic acoustic transducer (EMAT) that is different from traditional large EMATs. The maximum vertical magnetic flux density decreases quickly, and its distribution becomes very uneven with increasing lift-off distance of the permanent …
- 230000005291 magnetic 0 abstract description 106
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution; Measuring field distribution
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
- G01R33/18—Measuring magnetostrictive properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties, e.g. capacitance or reluctance
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Isla et al. | Optimization of the bias magnetic field of shear wave EMATs | |
| Sun et al. | Small electromagnetic acoustic transducer with an enhanced unique magnet configuration | |
| Ribichini et al. | Study and comparison of different EMAT configurations for SH wave inspection | |
| Pei et al. | A modified meander-line-coil EMAT design for signal amplitude enhancement | |
| Sun et al. | Improvement of unidirectional focusing periodic permanent magnet shear-horizontal wave electromagnetic acoustic transducer by oblique bias magnetic field | |
| Isla et al. | EMAT phased array: A feasibility study of surface crack detection | |
| Dhayalan et al. | Improving the signal amplitude of meandering coil EMATs by using ribbon soft magnetic flux concentrators (MFC) | |
| Jia et al. | Optimal design of point-focusing shear vertical wave electromagnetic ultrasonic transducers based on orthogonal test method | |
| Ma et al. | Excitation and detection of shear horizontal waves with electromagnetic acoustic transducers for nondestructive testing of plates | |
| Sun et al. | Point-focusing of shear-horizontal wave using fan-shaped periodic permanent magnet focusing coils EMAT for plate inspection | |
| KR100561215B1 (en) | Magnetostrictive transducers capable of generating and measuring elastic ultrasonic waves and structural diagnostic devices using them | |
| Sun et al. | New combination of magnet and coil of electromagnetic acoustic transducer for generating and detecting Rayleigh wave | |
| Liu et al. | Development of an omnidirectional SH 0 mode electromagnetic acoustic transducer employing a circumferential periodic permanent magnet array | |
| Xie et al. | A new longitudinal mode guided-wave EMAT with periodic pulsed electromagnets for non-ferromagnetic pipe | |
| Liu et al. | Design and experiment of array Rayleigh wave-EMAT for plane stress measurement | |
| Xie et al. | A flexible thin-film magnetostrictive patch guided-wave transducer for structural health monitoring | |
| Wang et al. | Performance optimization of axial magnetized magnetostrictive patch transducer for transduction of L (0, 2) ultrasonic guided wave for pipe inspection | |
| Sun et al. | Effective focal area dimension optimization of shear horizontal point-focusing EMAT using orthogonal test method | |
| Gao et al. | Noncontact magnetostrictive torsional guided wave sensors for small-diameter pipes | |
| Cai et al. | Enhancement of Lamb-EMAT signal using a modified one-side pitch-catch design | |
| Wu et al. | A type of EMAT for simultaneous detection of two components of Rayleigh wave | |
| Zhang et al. | A flexible EMAT enhanced with array magnetic core for inspection of curved structure | |
| Zhang et al. | Development of dual-main excitation mechanism modes electromagnet EMAT for testing ferromagnetic materials | |
| Yin et al. | Enhancement of Rayleigh wave generated by electromagnetic acoustic transducer based on new magnetic configuration | |
| Dhayalan et al. | A hybrid finite element model for spiral coil electromagnetic acoustic transducer (EMAT) |