In the use of the I‐Scan system for load distribution analysis, care should be taken as the sampling
frequency has a maximum value of 100 Hz (data frames per second). The results from the tests
conducted with frequencies higher than approximately 40–50 Hz should be used with care because of
the sampling theorem.
Hysteresis and drift effects in the I‐Scan sensor produce some errors in the values of the pressure
distributions obtained. These errors could be easily accounted for in static conditions but are not
straightforward to analyse in dynamic testing. A possibility of improving the system performance in
dynamic applications would be to consider statistical measures to estimate the error. However, using
static calibration still gives applicable results.
The results obtained from sine sweep tests show resonance in the system. The results in Figure 3
show that the responses for different sweep rates are somewhat different. One possible reason for this
is a rate‐dependent material behaviour, but this has not been further elaborated here. By the I‐Scan
system, the pitch motion of the boxes relative to each other can easily be detected.