| 摘要 |
A coin discrimination sensor for discriminating among desired and undesired coins, comprised of an excitation coil for producing an alternating magnetic field. These alternating magnetic fields couple to said desired and undesired coins to induce eddy-currents. The sensor also is comprised of a detection coil for detecting eddy-currents from desired and undesired coins. The detection coil produces a differential voltage corresponding to the composition of the desired and undesired coins being sensed.
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