Abstract :
When it comes to preventive maintenance, electric motors are pretty obliging. The vibration they produce is not just the source of an irritating noise. It is also a handy guide to the health of the motor. And for a new generation of sensors that can detect tell-tale changes in vibration, it acts as a source of energy. Energy harvesting is making it possible to power sensors from their environment. But i puts severe pressure on the radio transceivers.
