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100 Cătălin Ungureanu et al.
VI generates in a specific file (*.lvm) in the default LabVIEW Data folder
installed by LabVIEW in the default file folder of the operating system.
Experimental data were represented graphic with a Matlab application.
Calibration curve was presented in [6]. Diagram thus obtained is shown in
Fig.3.
d [mm]
0.02
0.01
0
-0.01
-0.02
0 50 100 150
l [mm]
Fig. 3 – Experimental diagram.
In these diagrams “l” represents the length of the measured piece in
mm and “d” the form deviation also in mm.
Trough numerous measurement data recorded it is possible that the
chart should be influenced by measurement noise. To remove these
noises, was made a filtration of data with a Matlab application using
smooth function [7]. The default syntax of smooth function is
yf = smooth (y,span),
where y is a column vector containing the acquired data and yf is the
result column vector after a moving average filter is applied. The smooth
function implements a lowpass filter with filter coefficients equal to the
reciprocal of the span. The span must be odd but the default span for the