SENSOR

PROBLEM TO BE SOLVED: To provide a sensor that, for example, can detect and identify an object to be detected without any contact by detecting the influence of the object to be detected to a high-frequency electromagnetic field to pay attention to electrostatic and electromagnetic characteristics that the object to be detected has. SOLUTION: A first excitation coil that is driven by a high-frequency power supply is wound around the core body of a magnetic material for forming a flux loop, a resonance circuit is formed by the first excitation coil and a first excitation-side capacitor, and voltage that is induced by the resonance circuit comprising a first detection coil that is wound around the core body electromagnetically and electrostatically connected to the first excitation coil and a first detection-side capacitor is changed due to the electrostatic and electromagnetic influence of the object to be detected near a detection end having the magnetic gap of the core body, thus, for example, detecting and identifying the object to be detected without any contact. COPYRIGHT: (C)2003,JPO