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Innovation

Images: Energy-saving sensors

By Bill Detwiler May 24, 2006, 4:38 AM PDT on Twitter billdetwiler

Image
1
of 4

Zinc oxide nanowires
Zinc oxide nanowires
Images: Energy-saving sensors

Georgia Institute of Technology

Professor Zhong Lin Wang at the Georgia Institute of Technology has devised a sensor that can harvest mechanical energy and convert it into electricity.rn

rnThe green field is an electron microscope image of an array of zinc oxide nanowires. In the middle is a drawing of how the probe, from an atomic force microscope, bends the nanowires. The third field shows the voltages produced by the array as it is scanned.

Georgia Institute of Technology
Images: Energy-saving sensors

At Intel, researchers are looking at ways to let radio-frequency identification tags exploit energy from RFID readers to perform additional tasks. The sensor detects motion around it. The microprocessor inside the sensor does not run on batteries or electricity from a wall socket, but on energy stored from a blast from an RFID reader.

Images: Energy-saving sensors

Joshua Smith of Intel Research Seattle and a WISP light sensor. In an experiment, Smith hung the sensor on his window and it detected light levels for 12 hours. These sensors take an ordinary RFID tag and increase its functionality.

Images: Energy-saving sensors

A WISP sensor running a second hand on a watch. If companies can develop microprocessors that require almost no power, sensors can be placed everywhere and their owners won’t have to worry about changing the batteries.

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By Bill Detwiler
Bill Detwiler is the Editor for Technical Content and Ecosystem at Celonis. He is the former Editor in Chief of TechRepublic and previous host of TechRepublic's Dynamic Developer podcast and Cracking Open, CNET and TechRepublic's popular online show.
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