Example displacement data files

One example displacement data file in each of the five compatible formats is available in this dedicated Dropbox folder.

Inside, the dropbox folder should look like this:

Each of the example files contains the same dataset, simply in different formats.

About the example dataset

The example dataset is a full matrix captured from a 1D, periodic array with the following array parameters:

• Number of array elements $n$: $105$
• Number of displacement measurements per A-scan $m$: $1000$
• Array pitch (centre-to-centre spacing between elements): $0.25$ mm

The array was formed on the surface of the following sample:

The sample was made of tungsten, for which the following elastic wave speeds may be taken:

• $c_\mathrm{L}=5182\mathrm{ms^{-1}}$
• $c_\mathrm{T}=2870\mathrm{ms^{-1}}$
• $c_\mathrm{LSAW}=5182\mathrm{ms^{-1}}$

Creating TFM images from the example dataset

To create TFM images using this dataset, the elastic wave speeds for tungsten given above may be used.

An imaging grid with a width of 30mm in the $x$-axis and a height of 12mm in the $z$-axis captures most of the features of the sample.

Example images produced using Chorus: