| 摘要 |
A proximity detector includes a low frequency magnetic field generator, located with an individual being monitored, the generator sequentially generating a plurality of time-varying magnetic fields having mutually orthogonal polarizations. A magnetic field sensor unit is provided within a second device, carried by another individual. The magnetic field sensor unit is operative to detect magnetic field energy associated with one or more of the magnetic fields generated by the magnetic field generator. Preferably, the magnetic field sensor unit includes a plurality (two or more) of magnetic field sensors having respective magnetic field polarization sensitivities that are oriented mutually orthogonal with respect to one another. |
