Metal detection sensor and metal detector including the same

摘要

The present invention relates to a metal detection sensor and a metal detector including the metal detection sensor. The present invention can detect a minute metal foreign object with high precision while responding to various situations. The magnet 12 is magnetized as magnetization means of a metal foreign substance arranged to generate a magnetic field in a range in which the magnetic field generated by the sensor coil 11 and the sensor coil 11 that generates the magnetic field by winding the conductor 13 around the core 12 is generated. An eddy current is generated in the package portion or the inspected object itself when the inspected object moves to the magnetic field for magnetization in the metal detection sensor 10A which detects the metallic foreign substance of the inspected object in the sensor coil 11 with the magnet 14A The magnetic field for detection functions as a cancellation magnetic field which reduces the vortex to a level at which vortexes do not disappear or failures, so that the sensor coil 11 is a metal foreign matter detection means, And functions as cancel means.