Energy Harvesting for Mobile Computing Joe Paradiso Responsive ...
Energy Harvesting for Mobile Computing Joe Paradiso Responsive ...
Energy Harvesting for Mobile Computing Joe Paradiso Responsive ...
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4/04<br />
©<br />
MIT-ML<br />
Active Hydraulic Chopping at Heel Strike<br />
• Heel compresses Hydraulic bladder by 8 mm<br />
– μ-hydraulic transducers hammer PZT stack<br />
– Many charge-pump cycles per footstep<br />
– Piezo driven at resonance frequency (20 kHz)<br />
• PZT generators occupy 1-cm cube<br />
– Each produces a watt<br />
• 40% efficiency<br />
– 3 per shoe gives 3 watts total<br />
• Components Tested<br />
– Fully integrated?<br />
8 mm<br />
JAP<br />
35
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