Releasable Data Capsule for High-Rate Underwater Transmission
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Solution Overview
Problem
Current underwater communication systems are slow and inefficient, particularly for transmitting large amounts of data from underwater vehicles to surface locations, as radio waves have poor penetration and acoustic modems have limited data rates, especially at long ranges.
Innovation Solution
A releasable data capsule system that includes a USB memory stick, battery, and buoyancy materials, which can surface with data and use a rocket to reach altitude for radio communication, deploying an antenna and parachute for efficient data transmission to ships or satellites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If acoustic modems are used for underwater communication, then data can be transmitted from underwater vehicles to surface locations, but the data rate drops below 1 kilobit at long ranges and lower frequencies
Solution Approach 1:
The patent introduces a surface buoy as an intermediary device that receives data from the underwater vehicle via acoustic modem and then transmits the data to the shore station via high-rate wireless communication. This mediator architecture separates the long-range low-rate acoustic communication from the short-range high-rate wireless communication, resolving the contradiction between communication range and data rate.
Solution Approach 2:
The patent replaces the purely acoustic communication system with a hybrid system that uses wireless electromagnetic communication for the surface-to-shore link. This substitution of communication medium (from acoustic to electromagnetic) enables high data rates while maintaining long overall communication range through the intermediary buoy.
2Speed
If radio waves are used for communication, then high data rates can be achieved, but penetration underwater is very poor except at extremely low frequencies
Solution Approach 1:
The patent divides the communication path into two segments: an underwater segment using acoustic modems and an above-water segment using radio waves. By segmenting the communication channel according to the optimal medium for each segment, the system achieves both underwater penetration and high data rates.
Solution Approach 2:
The surface buoy acts as an intermediary that transitions data from the acoustic domain (underwater) to the electromagnetic domain (air). This mediator enables the use of radio waves for high-rate communication while avoiding their poor underwater penetration characteristics.
3Speed
If the underwater vehicle surfaces to communicate data, then radio communication can achieve reasonable data rates, but the vehicle must stop its mission and return to surface
Solution Approach 1:
The system separates the data collection function (underwater vehicle) from the data transmission function (surface buoy). The vehicle can continue its mission while the buoy handles communication, eliminating the need for the vehicle to surface and lose mission time.
Solution Approach 2:
The surface buoy autonomously receives data from the underwater vehicle and manages its own transmission to the shore station. This self-service capability allows the vehicle to operate independently without needing to return to surface for data offloading.
4Speed
If a tether connection to a docking port is used, then the vehicle can transmit data while underwater, but infrastructure is required that is not typically available in unexplored areas
Solution Approach 1:
The patent uses a simple, deployable surface buoy instead of complex permanent docking infrastructure. The buoy is a relatively simple floating device that can be deployed temporarily in unexplored areas, avoiding the need for expensive, complex underwater docking ports and tethers.
Solution Approach 2:
The system changes the operational parameters by moving the communication infrastructure from underwater (docking port) to above water (buoy). This parameter change eliminates the need for complex underwater infrastructure while maintaining high data rate communication capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Achieves data rates significantly higher than existing acoustic modems, enabling fast and reliable transfer of large data payloads from underwater locations to surface locations, with effective data rates of up to 1.41 Mbps, overcoming the limitations of existing technologies.
Implementation Method 1
a releasable data capsule system that includes a USB memory stick, battery, and buoyancy materials, which can surface with data
Implementation Method 2
a rocket to boost the system out of the water to a higher altitude
Implementation Method 3
Once the system is airborne, it can transmit data to a ship or satellite via radio communications
Data Source
AI summary
The systems and methods described herein include releasable storage devices that can surface with data. The devices include data storage, an antenna, battery and means to propel the device to the surface or into the atmosphere. In certain embodiments, it is a USB memory stick, a battery, suitable buoyancy, and an antenna. In certain embodiments, the systems and methods described herein include a rocket to boost the system out of the water to a higher altitude. Once the system is airborne, it can transmit data to a ship or satellite via radio communications, via other line of site methods such as optical, or may be captured by an aircraft such as a UAV.