发明名称 |
DEVICE FOR MEASURING THE VELOCITY OF A MAGNETICALLY RECEPTIVE OBJECT |
摘要 |
A device for measuring the speed of a golf club has a pair of coils spaced a given distance apart with each of the coils forming an oscillating electro-magnetic field which are positioned to interrupt the course of the head of a golf club. When a golf club head successively passes through the first and second oscillating magnetic fields, the natural frequency of the combined fields is altered. A detector circuit including a phase locked loop detects the change in frequency as the club successively pass through the two fields and the time elapsed is measured by a clock and recorded in the memory of a microprocessor which uses the information, along with the given distance between the fields to calculate the speed of the club.
|
申请公布号 |
US2002079887(A1) |
申请公布日期 |
2002.06.27 |
申请号 |
US20000746387 |
申请日期 |
2000.12.21 |
申请人 |
ZAJAC GERRY W.;GALLAS JAMES M.;PANOSH RICHARD |
发明人 |
ZAJAC GERRY W.;GALLAS JAMES M.;PANOSH RICHARD |
分类号 |
A63B69/36;G01P3/66;(IPC1-7):G01P3/66 |
主分类号 |
A63B69/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|