MAGNETIC COMMUNICATION THROUGH METAL BARRIERS

摘要

A wireless magnetic through-hull communications apparatus and method which permit higher data-rate communications through materials than presently available using acoustic techniques is described. A signal source on one side of a barrier is directed into a coil driver which generates an amplified, modulated signal responsive thereto. The resulting signal is used to drive a transmitter coil which generates a time-varying magnetic field that penetrates the barrier as well as any gaps comprising water, air or other material between the barrier and the transmitter coil. On the other side of the barrier, and perhaps through additional gaps comprising water, air or other material, a receiver coil detects the time-varying magnetic field. This signal may be amplified and then digitized by a signal processor. The signal processor may then communicate with a data processing and/or display unit, another sensor or some other device. Electric power may also be transmitted through the barrier for providing power to instrumentation without the need for batteries.