Device for measuring swing velocity of the golf club head using the resonance circuit

A device for measuring swing velocity of a golf club head, comprising a resonance circuit portion having a first parallel resonance circuit and a second parallel resonance circuit that are spaced from each other by a predetermined distance, a first voltage detector and a second voltage detector for detecting voltage signal by the amount of impedance change generated from each resonance circuit as a golf club head having conductivity becomes closer to said first and second parallel resonance circuits, and an oscillator applying predetermined frequency to said first and second parallel resonance circuits;

• an amplification portion for amplifying each voltage signal detected by said first and second voltage detectors;
• a wave shaping portion for outputting each voltage signal output from said amplification portion as pulse-shaped peak wave on the basis of predetermined comparative voltage value;
• a microcomputer for controlling the operation of calculating a time difference between the peak waves, and indicating swing velocity data of the golf club head using the time difference and the distance between said first parallel resonance circuit and said second parallel resonance circuit;
• and
• a display portion for displaying the swing velocity data according to the output signal of said microcomputer.