MULTI-FREQUENCY REMOTE COMMUNICATIONS SYSTEM

摘要

This invention relates to remote two-way data communication between units through the wall of a pipeline, storage tank or other containment vessel. The efficient control of devices deployed within metal containment vessels such as pipelines or storage tanks is difficult without intrusion into the vessel by wires. Prior art systems have been limited in range and speed of data transfer. The present invention comprises a control unit located remote from the containment vessel and capable of two-way RF communication with a translator unit located on the outside of the containment vessel. The translator unit is capable of two-way RF communication with the control unit and two-way EM communication at low frequency with a command unit attached to a device located inside the containment vessel. Signals sent from the control unit to the translator unit are converted to low frequency EM and transmitted through the wall of the containment vessel to the command unit for controlling the device inside the vessel. Signals and data from the device inside the vessel are sent by low frequency EM back through the vessel wall to the translator where they are converted to RF for transmission to the hand held control unit located remote from the containment vessel.