Magnetic force generating device and collision prevention system including the same
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jun 25, 2015
app pub date -
May 15, 2014
filing date -
Dec 25, 2013
priority date (Note) -
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Abstract
A magnetic force generating device is provided for application to a first object that is movable relative to a second object providing a first magnetic force, and includes a coil disposed on the first object, a sensing module disposed on the first object adjacent to the coil for sensing a distance between the first and second objects, and a processor. When the sensed distance is shorter than a threshold value, the processor enables provision to the coil of a driving current having a magnitude negatively correlated to the sensed distance, so that the coil generates a second magnetic force, which is repulsive to the first magnetic force, in response to the driving current.
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