发明名称 |
Systems and methods for proximity control of a barrier |
摘要 |
Disclosed is a system and method for proximity control of a barrier comprising a stationary wireless signal receiving device and a mobile transmitting device. The wireless signal receiving device may monitor at least one transmitting device within a predetermined coverage area and may be a radio frequency receiver or a spread spectrum receiver located near the barrier. In one embodiment, the transmitter device emits a control signal that is received by the receiving device when the transmitter is within a reception range. In one embodiment, the control signal includes transmitter identification information, directional information and position information.
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申请公布号 |
US2005206497(A1) |
申请公布日期 |
2005.09.22 |
申请号 |
US20040875343 |
申请日期 |
2004.06.23 |
申请人 |
TSUI GALLEN K L;TSUI PHILIP Y |
发明人 |
TSUI GALLEN K.L.;TSUI PHILIP Y. |
分类号 |
E01F13/10;E05F15/20;G07C9/00;G08C17/02;G08C21/00;H04B1/00;(IPC1-7):H04B1/00 |
主分类号 |
E01F13/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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