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Wireless microsensors in factories, hospitals, cars, and so on process information that can save money, energy, and lives. Unfortunately, tiny batteries exhaust quickly, and replacing so many of them frequently is impractical. This is why recharging them with ambient energy is so appealing, especially when vibrations, for example, are abundant and steady. Still, tiny piezoelectric transducers draw...
Wireless microsystems can add intelligence to hospitals, homes, and factories that can save money, energy, and lives. Unfortunately, tiny batteries cannot store sufficient energy to sustain useful microsystems for long, and replacing or recharging the batteries of hundreds of networked nodes is costly and invasive in the case of the human body. Thankfully, shocks and vibrations are prevalent in many...
Piezoelectric harvesters are popular today because they typically draw more power from kinetic energy in motion than electrostatic and electromagnetic systems. Still, tiny transducers only derive a small fraction of what is available. Thankfully, raising the damping force with which transducers draw power increases that fraction, except overinvesting battery energy for that purpose can overdamp the...
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