MEDIUM GIVEN MAGNETIC SUBSTANCE AND MAGNETIC SUBSTANCE DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide a medium given a magnetic substance and a magnetic substance detector whose detecting accuracy is increased by suppressing detection errors due to the directions in which the magnetic substance detector detects the medium without contact.

SOLUTION: The medium is given the magnetic substance that produces a signal by being given a magnetic field. The magnetic substance has at least two or more directions in which magnetization is easy, and creates information that specifies the medium based on the signal that the magnetic substance produces by being given a magnetic field.

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