New underwater camera could help scientists explore unknown regions of the ocean, track pollution, or monitor the effects of climate change. More than 95 percent of Earth’s oceans have never been observed, according to estimates by scientists, which means we have seen less of our planet’s ocean t
A battery-free, wireless underwater camera developed at MIT could have many uses, including climate modeling. “We are missing data from over 95 percent of the ocean. This technology could help us build more accurate climate models and better understand how climate change impacts the underwater world,” says Associate Professor Fadel Adib. Credit: Adam Glanzman
Fadel Adib associate professor in the Department of Electrical Engineering and Computer Science and director of the Signal Kinetics group in the MIT Media Lab, and Research Assistant Waleed Akbar display the battery-free wireless underwater camera that their group developed. Credit: Adam Glanzman Transducers made from piezoelectric materials are placed around the camera’s exterior and are used to acquire energy. Piezoelectric materials produce an electric signal when a mechanical force is applied to them. When a sound wave traveling through the water hits the transducers, they vibrate and that mechanical energy is converted into electrical energy.
They solved both problems simultaneously using red, green, and blue LEDs. When the camera captures an image, it shines a red LED and then uses image sensors to take the photo. It repeats the same process with green and blue LEDs.
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