发明名称 |
Volleyball net touch detecting and indicating system |
摘要 |
Volleyball net touch violations are detected and an indicator identifying the offending team is actuated by a system that incorporates antennas into the volleyball net and utilizes radiant energy generated by court illuminating lights. A wire mesh antenna is affixed to each side of the net. The outputs of the antennas are amplified and compared with a reference. A player touching either net adds capacitance to the system producing a measurable signal. A NAND gate logic circuit determines which net was touched and actuates the appropriate indicator. The system does not respond to the volleyball which is a dielectric material does not add capacitance to the system.
|
申请公布号 |
US4398724(A) |
申请公布日期 |
1983.08.16 |
申请号 |
US19820350500 |
申请日期 |
1982.02.19 |
申请人 |
WILSON, WAYNE D.;JOYCE, JAMES J. |
发明人 |
WILSON, WAYNE D.;JOYCE, JAMES J. |
分类号 |
A63B71/06;(IPC1-7):A63B71/06;A63B61/00 |
主分类号 |
A63B71/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|