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Engineers Build Battery-Free, Wireless Underwater Camera

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The autonomous camera is powered by sound. It converts mechanical energy from sound waves traveling through water into electrical energy that powers its imaging and communications equipment.

Credit: Adam Glanzman

Massachusetts Institute of Technology (MIT) engineers developed a battery-free, wireless underwater camera which they describe as approximately 100,000 times more energy-efficient than other undersea cameras.

The camera powers its imaging and communications components by converting mechanical energy from sound waves into electricity, and also uses sound waves to send data to a receiver that reconstructs images.

Exterior piezoelectric transducers harvest energy from sound waves to produce electrical energy.

Red, green, and blue light-emitting diodes enhance the camera's low-power imaging sensors to produce color photos, while data is transmitted to the receiver through underwater backscattering.

MIT's Fadel Adib said, "This technology could help us build more accurate climate models and better understand how climate change impacts the underwater world."

From MIT News
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