发明名称 |
Interactive magnetic marker field for safety systems and complex proximity warning system |
摘要 |
A proximity detection comprising a generator that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a radio frequency device that sends radio frequency signals, the radio frequency device being capable of sensing the magnetic field and generating a radio frequency response. In the proximity detection system, the generator generates the magnetic field for a first predefined time period, and thereafter senses for a radio frequency response signal from the radio frequency device within a second predefined time period. The invention also provides for shaping proximity detection zones by overlaying magnetic field boundaries to produce a different boundary. The invention also provides for varying the strength of magnetic fields by adjusting a width of a timed pulse. |
申请公布号 |
ZA200802673(B) |
申请公布日期 |
2010.05.26 |
申请号 |
ZA20080002673 |
申请日期 |
2008.03.26 |
申请人 |
FREDERICK MINING CONTROLS LLC. |
发明人 |
FREDERICK, LARRY D.;HAMMOND, PAUL L. |
分类号 |
F16P;G05F;G08B |
主分类号 |
F16P |
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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