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This study evaluated a digital locking device design using detection distance of 13.4mm of a human bodysensing type magnetic field coil. In contrast to digital locking devices that are used nowadays, the existing serial number entering buttons, lighting, number cover, corresponding pcb, exterior case, and data delivery cables have beendeleted and are only composed of control ON/OFF power switches and emergency terminals. When the magnetic fieldcoil substrates installed inside the inner case detects the electric resistance delivered from the opposite side of the12mm interval exterior contacting the glass body part, the corresponding induced current flows. At this time, the magnetic field coil takes the role as a sensor when coil frequency of the circular coil is transformed. The magnetic coil as a sensor detects a change in the oscillation frequency output before and after the body is detected. This isthen amplified to larger than 2,000%, transformed into digital signals, and delivered to exclusive software to compareand search for embedded data. The detection time followed by the touch area of the body standard to a 12.8O magnetic field coil was 30% contrast at 0.08sec and 80% contrast at 0.03sec, in which the detection distance was 13.4mm, showing the best level

A study on digital locking device design using detection distance 13.4mm of human body sensing type magnetic field coil