Larson Davis HVM200 - Page 31

HVM200 Reference Manual Downloading Data 3-14
%% Plot
figure(1);
plot(x_axis,'-b');
hold on;
plot(y_axis, '-r');
plot(z_axis, '-k');
hold off;
legend('x','y','z');
title('HVM200 Data');
save(rawsavename,'x_axis','y_axis','z_axis','Sample_Rate','Sample_Time')
;
%% Further processing through ISO 8041 Wk filter
x_axis_filt = isofilwk(x_axis, Sample_Rate);
y_axis_filt = isofilwk(y_axis, Sample_Rate);
z_axis_filt = isofilwk(z_axis, Sample_Rate);
figure(2);
plot(x_axis_filt,'-b');
hold on;
plot(y_axis_filt, '-r');
plot(z_axis_filt, '-k');
hold off;
title('HVM200 Data with Wk filter');
legend('x','y','z');
save(filteredsavename,'x_axis_filt','y_axis_filt','z_axis_filt','Sample_
Rate','Sample_Time');
Weighting Filters for Raw Data
The "isofilwk()" function comes from sample code taken from the ISO
8041 standard, and can be modified for other weighting filters using the
desired parameters from Table 3-1 'Parameters and transfer functions of
the frequency weightings (source: ISO 8041)'.
Use the following script and table to adjust RAW data file for hand arm or
whole body vibrations.
isofilwk() Sample Code (ISO 8041 standard)
function y = isofilwk(x, fs)
% ISOFILWK
% Filter ISO 8041 Wk
% y = isofilwk(x,fs)