Patent ID: 9530269
Filing Date: 2016-12-27
CPC Classification: G07D

Claim Text:
1. A device for identifying a coin-shaped identification object to identify authenticity and/or condition of a coin-shaped identification object of multiple types, the device comprising: a passage path, through which the identification object passes through; an exciting coil and a detection coil; a core body around which the exciting coil and the detection coil are wound; and a control unit to which the detection coil is connected; wherein, the core body comprises a first core, placed at a first side in a thickness direction of the identification object passing through the passage path, the exciting coil being wound around the first core; and a second core, placed at a second side in the thickness direction of the identification object passing through the passage path, the detection coil being wound around the second core; wherein an analog coil output signal created on the basis of an output from the detection coil is input into the control unit, a signal level of the coil output signal rising if the identification object passes through the passage path; the control unit is configured to obtain a signal value of the coil output signal at a time when the signal level of the coil output signal is equal to or higher than a predetermined threshold, and identify the identification object on the basis of the obtained signal value of the coil output signal; and among identification objects of multiple types, an identification object having a largest outer diameter, a thickest thickness, and a lowest electrical resistivity is a first identification object; and an identification object having a smallest outer diameter, a thinnest thickness, and a highest electrical resistivity is a second identification object; and where a first thickness represents a thickness of the core body in a passing direction of the identification objects in the case where a bottom value of the signal level of the coil output signal, at a time when a plurality of first identification objects continuously pass with no space between every two of the first identification objects through the passage path, is equal to a peak value of the signal level of the coil output signal, at a time when the second identification objects pass through the passage path; a thickness of the core body in the passing direction of the identification objects is less than the first thickness.