Biomedical Engineering Reference
In-Depth Information
Cantilever sheet battery (1cm
0.3 mm) voltage
and peak current produced for various tip deflections
×
3 cm
×
10
8
6
4
2
Voltage, mV
peak current, mA
0
02468 0 2 4 6 8
Cantilever tip deflection, mm
FIGURE 2.38
Typical voltage/current output of IPMNC samples under flexing/bending. The
IPMNC sample has a dimension of 10-mm width, 30-mm length, and 0.3-mm thickness.
IPMC response under compression
(200N load)
Sensor
output, MV
Load, N
250
250
Sensor output
Load
200
200
150
150
100
100
50
50
0
0
-50
-50
0 0 0 0 0 0 0 0 0
Time (s)
FIGURE 2.39
Outvoltage due to normal impact of 200-N load on a 2-cm × 2-cm × 0.2-mm
IPMNC sample.
observed to generate large output voltage. Endo-ionic motion within IPMNC thin
sheet batteries produced an induced voltage across the thickness of these sheets when
a normal or shear load was applied. A material testing system (MTS) was used to
apply consistent pure compressive loads of 200 and 350 N across the surface of an
IPMNC 2-
2-cm sheet. The output pressure response for the 200-N load (73 psi)
was 80 mV in amplitude and for the 350-N load (127 psi) it was 108 mV.
This type of power generation may be useful in the heels of boots and shoes or
places with a lot of foot or car traffic. Figure 2.39 depicts the output voltage of the
thin sheet IPMNC batteries under 200-N normal load. The output voltage is generally
about 2 mV/cm length of the IPMNC sheet.
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