DETECTION SYSTEM AND MUSICAL INSTRUMENT
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Nov 20, 2024
filing date -
Nov 20, 2024
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Abstract
A first detection signal is generated based on a distance between a first detectable coil disposed on a first key and a first drive coil. A second detection signal is generated based on a distance between a second detectable coil disposed on a second key and a second drive coil. The first drive coil includes first and second drivers through which current flows in a first direction and in a second direction opposite to the first direction, respectively. The second drive coil includes third and fourth drivers through which current flows in the first direction. The first detectable coil includes first and second portions in which induction currents in opposite directions are generated by electromagnetic induction of the first drive coil. The second detectable coil includes third and fourth portions in which induction currents in the same direction are generated by electromagnetic induction of the second drive coil.
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