B. GLEICH, I. SCHMALE, T. NIELSEN, AND J. RAHMER, PHILIPS RESEARCH HAMBURG, GERMANY
To wireless check the conditions the sensor is in, the researchers remotely excited the magnets with pulses of current from electromagnetic coils. The distance between the magnets, how much they oscillate, and how much they expand and contract then helps them gauge the sensor’s temperature, pressure and location.In one experiment, the team dropped the sensor inside a long, winding tube to mimic the gastrointestinal tract. They then recorded its path and position in 3D.
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