Dear All,
Would someone guide me please, about:
I am mechanically exciting a piezoelectric polymer device at a very low frequency range (1-5Hz).
With an oscilloscope, the V-phase appears to fall out-of-phase and I cannot understand why V and Load phases are not overlapping?
This is not the case when using a NI-DAQmx though; and the voltage and applied load phases match exactly and perfectly on each others.
Therefore, I wondered if, generally, oscilloscopes are not a suitable way of acquiring data at low-frequency piezo excitations?
(or is there something else which I am not aware of about these two systems data acquisition method)?
Will really appreciate any idea and help.
Thanks in advance.
Ali
Would someone guide me please, about:
I am mechanically exciting a piezoelectric polymer device at a very low frequency range (1-5Hz).
- Using an Oscilloscope and a NI-DAQmx software, I received the same pk-pk Voltage magnitudes; but with different voltage-load phase configurations.
With an oscilloscope, the V-phase appears to fall out-of-phase and I cannot understand why V and Load phases are not overlapping?
This is not the case when using a NI-DAQmx though; and the voltage and applied load phases match exactly and perfectly on each others.
Therefore, I wondered if, generally, oscilloscopes are not a suitable way of acquiring data at low-frequency piezo excitations?
(or is there something else which I am not aware of about these two systems data acquisition method)?
Will really appreciate any idea and help.
Thanks in advance.
Ali