Compressional wave velocity Vp and shear wave velocity Vs are measured by recording the travel time of a transmitted ultrasonic wave through a sample of known length.
Travel time is calculated from the first break for P-wave and from the zero crossing for the S-wave. Overall accuracy of the measurement is 50 m/s for P-waves and 100 m/s for S-waves.
Elastic wave velocity measurement can be performed at variable axial, radial and fluid pressure condition. It can be combined with geotechnical and flooding tests.
Technical specifications
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Waves: Compressional wave and two shear waves at perpendicular directions.
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Frequency: 100 kHz to 1000 kHz.
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Amplitude: 5 Volt
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Stress level: 1 MPa to 50 MPa
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Stress condition: Uniaxial, hydrostatic.
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Temperature: 15°C to 25°C
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Sample size: