48
Probe output file
Data from all recorded probes will be output into a single file.
PIV probe data
The PIV data will include four columns for each probe: the X and Y locations of its centroid,
measured from the upper left of the window, and the X and Y velocity at each point in time. The
X/Y location columns will only have entries in the first row.
Note
:
The probe data will only be recorded while the video is playing. Snap shot images or
paused video will not record probe data.
Polygon probe data
The Polygon probe data output depends on the options selected in the
Polygon Probe
Properties
window. The first two columns are the horizontal and vertical pixel location of the
centroid, referenced from the top, left corner of the image. The data columns are listed next
and depend on the display options selected in the
Polygon Probe Properties
window.
Macropixel probe data
The macropixel probe data contains four columns for each probe.
Macropixel sum from {X, Y} defines the location of the macropixel probe. X and Y are the
horizontal and vertical locations, respectively, of the top left corner of the probe.
Span{x, y, n}: defines number of pixels in the horizontal (x) and vertical (y) direction of each sub-
probe; and the selected frame averaging (n).
The probe data column headings {a, b} are the position of the sub-probe in the array {horizontal,
vertical}, with the bottom left corner sub-probe listed as position {0, 0}.
6.5
Saving probes
A set of probes can be saved to disk and recalled later:
1.
Arrange the probes and set their Properties.
2.
Choose
File >Save Probes
As
to create a new probe file. Probe files are saved in the
uScope file format (*.usc).
3.
Select the name and location for the file and click
Save
.
To recall a stored set of probes choose
File > Open
.
