With the proliferation of wireless equipment comes the problem of powering it. There are batteries, of course, but these are impractical when it comes to equipping hard-to-reach sensors. That's why a number of alternative solutions have been studied, involving the recovery of local energy (thermal, vibration, wind, radiation, etc.) to power the equipment. This is what the Anglo-Saxons call Energy Harvesting. According to market research firm Companies & MarketsEnergy Harvesting is expected to generate sales in excess of $4 billion in 10 years' time. The research report indicates that some 200 companies are active in this field, including Ambient Research, Arveni, Boeing, Cymtox, Ferro Solutions, General Electric, IntAct, KCF Technologies, Northrop Grumman, Omron, Polatis Photonics, Rockwell Scientific, Selex Galileo, Syngenta Sensors UIC and Trophos Energy.
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