| 摘要 |
PURPOSE: Provided is a golf ball sensor which senses a golf ball with a tag stored within assigned distance from a sensor to cause alarm so that it helps to find the golf ball easily in a golf club. CONSTITUTION: The golf ball sensor comprises the parts of: a tag which includes a resonance circuit at the golf ball; and a sensor which sends a certain type of a wireless signal, modulates the signal into an RF signal, checks the level of the wireless signal returned from surface or materials like the golf ball or so on through an antenna, demodulates the received RF signal into an original signal and causes alarm as the sensed level.
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