{
  "$type": "site.standard.document",
  "description": "The invention states to a complex proximity, detection system. The invention provides a proximity detection system comprising a generator (22, 44, 46) that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a…",
  "path": "/patents/959098",
  "publishedAt": "2015-07-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60Q9/008",
    "STRATA PROXIMITY SYSTEMS LLC [US]"
  ],
  "textContent": "The invention states to a complex proximity, detection system. The invention provides a proximity detection system comprising a generator (22, 44, 46) 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 (30, 32, 34) 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.",
  "title": "Interactive magnetic marker field for safety systems and complex proximity warning system"
}