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2. Description of the test bench
A typical measurement bench consists of an electrical pulse generator, an oscilloscope for visualization and/or an acquisition card for transferring ultrasonic signals to a computer for signal processing. It is of course essential to use a sampling frequency at least equal to twice the signal frequency to meet Shannon's criterion. One or two ultrasonic probes are connected to the electrical generator, depending on the chosen working mode: reflection or transmission (figure 6 ). This description can be supplemented by displacement plates, attitude adjustment systems, etc.
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Description of the test bench
Measurements for solids characterization
Bibliography
Standards and norms
- Standard Practice for Measuring Ultrasonic Velocity in Materials, ASTM International, West Conshohocken, PA - ASTM E494-15 - 2015
Patents
MARTINOTY (P.), COLLIN (D.). Piezo-Rheometric Measuring Cell and Corresponding Piezo-Rheometer. US 20080236255 A1. WO 2006/018516.
SINHA (D.N.). – Non invasive identification of fluids by swept-frequency acoustic interferometry. Patent number 5767407 (1998).
Software tools
Disperse Software. Guided wave dispersion curve calculation. Developed by LOWE (M.J.S.) et al, Imperial College London NDT.
Cast3M – Finite element calculation software developed by the French Atomic Energy Commission (CEA).
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