Submerged Buoy Data Acquisition System Using Digital Signal Processing
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Solution Overview
Problem
Existing submerged buoy systems experience signal attenuation and interference due to long-distance towing ropes, which degrade the acquisition performance of marine environmental data.
Innovation Solution
A new submerged buoy data acquisition system incorporating a battery compartment, main control processor, GPS receiver, gigabit Ethernet interface module, and data acquisition boards with hydrophone sensors, AD/DA conversion circuits, FPGA, ARM processor, and storage modules, which convert analog sound signals to digital and transmit them via gigabit Ethernet to reduce attenuation and ensure synchronous data acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple hydrophones are connected in series/parallel through a long-distance towing rope to increase received signal energy, then the signal energy is improved, but signal attenuation and interference increase
Solution Approach 1:
The patent replaces the mechanical/electrical signal transmission system (analog signal through towing rope) with a digital signal processing system. The hydrophone signals are converted to digital format through ADC circuits, processed digitally by FPGAs and ARM processors, and transmitted via Ethernet cables. This substitution eliminates the signal attenuation and interference problems associated with long-distance analog signal transmission through towing ropes, while maintaining the ability to collect and process signals from multiple hydrophones.
Solution Approach 2:
The patent introduces digital signal processing components (ADC circuits, FPGA, ARM processor) as intermediaries between the hydrophones and the host computer. These intermediaries convert analog signals to digital format, perform signal processing and enhancement locally, and then transmit the processed digital signals. This intermediary system resolves the contradiction by preventing signal degradation during transmission while still allowing multiple hydrophones to contribute to the overall signal energy.
2Power
If multiple hydrophones are connected in series/parallel to increase received signal energy, then the signal energy is improved, but acquisition performance deteriorates
Solution Approach 1:
The patent replaces the simple series/parallel electrical connection system with a sophisticated digital signal processing architecture. Multiple hydrophones are connected to independent data acquisition boards, each with its own ADC, FPGA, and ARM processor. The signals are processed digitally with advanced algorithms for noise reduction, signal enhancement, and synchronization. This digital system maintains high signal energy from multiple hydrophones while significantly improving acquisition performance through intelligent signal processing.
Solution Approach 2:
The patent divides the data acquisition system into multiple independent data acquisition boards, each handling specific hydrophones. Each board is a self-contained unit with hydrophone sensors, front-end drive circuits, ADC conversion circuits, clock modules, DA conversion circuits, FPGA, ARM processors, and storage modules. This segmentation allows parallel processing of multiple signals, improving both signal energy accumulation and acquisition performance simultaneously, while enabling independent optimization of each channel.
3Device complexity
If analog sound signals are transmitted through a long-distance towing rope to a host computer, then the system structure is simple, but signal attenuation and interference occur
Solution Approach 1:
The patent replaces the simple analog signal transmission system with a digital signal processing and transmission system. Instead of transmitting analog signals through a long towing rope, the system converts signals to digital format using ADC circuits, processes them through FPGAs and ARM processors, and transmits digital data through Ethernet cables to the host computer. This substitution eliminates signal attenuation and interference while the modular architecture keeps the overall system structure organized and manageable.
Solution Approach 2:
The patent introduces digital signal processing components (ADC circuits, FPGA, ARM processor, Ethernet interface) as intermediaries between the hydrophones and the host computer. These intermediaries convert analog signals to digital format, perform local processing and enhancement, and transmit the processed digital signals through robust Ethernet communication. This intermediary system resolves the signal attenuation problem while maintaining reasonable system complexity through standardized digital interfaces.
4Loss of energy
If data are stored on SD cards and transmitted via gigabit Ethernet, then signal attenuation is reduced, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by storing processed digital signals locally on SD cards within each data acquisition board before transmission to the host computer. This pre-storing of data eliminates the need for continuous analog signal transmission through long cables, thereby preventing signal attenuation. The data can be stored temporarily and then transmitted via gigabit Ethernet when needed. While this adds some complexity, it is offset by the use of standardized storage interfaces and the benefits of eliminating analog transmission infrastructure.
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
The system effectively reduces signal attenuation and interference, enhancing data acquisition performance by converting analog signals to digital and storing them on SD cards for transmission to a host computer, while providing precise timing for clock calibration and synchronous control.
Implementation Method 1
a hydrophone includes a hydrophone sensor, and the hydrophone sensor is configured to receive a sound signal in an ocean
Data Source
AI summary
The present invention discloses a new submerged buoy data acquisition system, including a battery compartment, a main control processor, a GPS receiver, a gigabit Ethernet interface module, and a plurality of data acquisition boards, where the GPS receiver is connected to the main control processor, and the main control processor is connected to a host computer by using the gigabit Ethernet interface module; the data acquisition board includes a hydrophone sensor, a front-end drive circuit, an AD conversion circuit, a clock module, a DA conversion circuit, an FPGA, an ARM processor, and a storage module; the hydrophone sensor is connected to the AD conversion circuit by using the front-end drive circuit, the AD conversion circuit is connected to the FPGA, the FPGA is connected to the ARM processor, the storage module is connected to the ARM processor, the DA conversion circuit is connected to the FPGA and the clock module, the clock module is connected to the FPGA, and the ARM processor is connected to the main control processor. The present invention improves acquisition performance of the submerged buoy data acquisition system, and implements synchronous acquisition and control of the entire system.