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Fabrication and Characterization of a Low-Cost Piezoelectric using Rochelle
Salt for Energy Harvesting and Sensor Applications
And then, the real thing happened. We tapped on the thin film,
shown in Figure 53, which resulted in the oscilloscope showing
results in real-time; it was like watching the film responding to the
force we imparted on manifestation of mechanical stress on
electrical response. This whole process taught us the unique
behaviour of the material in piezoelectricity.
Figure 53: Tapping testing
Impact Hammer Test
In this experiment, results were measured and analysed using a
Hantek dual digital storage oscilloscope DSO5202P. The setup
was simple: the impact hammer was connected to the
oscilloscope's second channel, while the experimental device was
connected to the first channel. The impact hammer, which has an
aluminium tip, was then used to exert mechanical stress on the
thin film. Anti-static gloves were worn to eliminate any possibility
of static interference. The impact hammer, as shown in Figure 54
and 55, was carefully used to apply stress and record responses
from the material. These measurements provided insight into the
piezoelectric properties of the material.
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