Through-the-Hull Data Transfer

Wireless modems have been proposed to get around the need for hull penetrators.  The initial goal for these modems will be to support installation of CTD senors which are important for improving the performance of other submarine sensors, but an even larger potential market might exist for a mature, reliable, easily installed, high performance modem with low lifecycle costs which could replace hull penetrators in new submarine construction and retrofits and for other platforms such as deep diving submersibles or undersea infrastructure.  This modem might also have commercial potential based on its ability to replace penetrators used in harsh environments. A novel approach is proposed based on techniques developed for the field of Structural Health Monitoring where a Shunt Damping PZT transducer is used in conjunction with an Electromechanical Impedance Measurement Device to provide wireless through-hull communications at ultra-low power levels and in a manner that allows for a simpler installation process than traditional methods.