04-07-2017, 04:14 PM
The wireless underwater mesh could be developed for underwater sensor networks. This requires the wireless transmission of power from the sensor hub to the transducer module and the bidirectional wireless data communication between the hub and the transducer. The results of an experimental deployment of systems with conventional waterproof couplings show that these are a significant deficiency of existing systems. Experiments show that a Zigbee transceiver operating in the 2.4 GHz band can communicate with low error rates up to 40mm at low RF power (-25dBm) and up to 70mm at higher power (-3 DBm) in sea water. The ranges are slightly higher in fresh water. Inductive power transfer, which uses a split transformer design, can transmit low power, in the 50-100mW range with an efficiency of approximately 50%, demonstrating that wireless sensor couplings are feasible.
