Underwater Ferromagnetic Detection Using Seawater Field Enhancement
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Solution Overview
Problem
Existing underwater ferromagnetic target detection methods are limited by weak electromagnetic field signals, high costs, and inability to perform long-distance large-scale detection due to interference from seabed terrain and background noise, without considering seawater as a conductor or ships as secondary radiation sources.
Innovation Solution
A method and system using multiple power frequency radiation sources, including a power transmission network generating a power frequency electromagnetic field, considering seawater as a conductor to enhance induced currents and incorporating ships as secondary radiation sources to augment electromagnetic field signals, with a detection model based on Maxwell's electromagnetic equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing underwater ferromagnetic target detection methods are used, then detection can be achieved, but electromagnetic field signals are weak and long-distance large-scale detection cannot be performed
Solution Approach 1:
The patent introduces seawater as an intermediary conductor between the power frequency radiation source and the underwater ferromagnetic target. The seawater generates induced currents that act as a mediator to enhance the electromagnetic field signal, allowing the signal to propagate over longer distances while maintaining detection capability.
Solution Approach 2:
The patent changes the physical parameters of the detection system by utilizing the electrical conductivity parameter of seawater. By considering seawater's conductivity and its interaction with power frequency electromagnetic fields, the system transforms the weak direct signal into a enhanced signal through induced currents, enabling long-distance detection.
2Measurement precision
If power frequency electromagnetic field is used for detection, then detection can be performed, but signal strength is insufficient due to not considering seawater as conductor
Solution Approach 1:
The patent applies the self-service principle by utilizing seawater's natural electrical conductivity property without requiring additional active components. The seawater itself serves the function of signal enhancement through induced currents, eliminating the need for complex external signal amplification devices.
Solution Approach 2:
The patent changes the approach by considering the electrical conductivity parameter of seawater, transforming it from a passive medium into an active signal enhancement component. This parameter consideration enables signal strength improvement through natural physical processes rather than complex device additions.
3Measurement precision
If traditional detection methods are used, then detection is possible, but accuracy is reduced due to interference from seabed terrain and background noise
Solution Approach 1:
The patent uses seawater as an intermediary that selectively enhances the electromagnetic field signal while naturally filtering out certain interference components. The induced currents in seawater create a focused enhancement effect on the target signal, improving the signal-to-noise ratio and reducing the impact of seabed terrain interference and background noise.
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
Enhances electromagnetic field signals for long-distance large-scale detection of underwater ferromagnetic targets by combining induced and secondary magnetic fields, providing accurate detection through power frequency electromagnetic field distribution analysis.
Implementation Method 1
a power transmission network generating a power frequency electromagnetic field in a spatial range, the underwater ferromagnetic target generating an induced electromagnetic field under the action of the power frequency electromagnetic field
Implementation Method 2
seawater inside and outside the underwater ferromagnetic target generating alternating currents under the action of the power frequency electromagnetic field, and the alternating currents acting on the underwater ferromagnetic target to generate a secondary magnetic field
Implementation Method 3
seawater inside and outside the underwater ferromagnetic target generating alternating currents under the action of the power frequency electromagnetic field
Implementation Method 4
an induced current generated by the ship on the water under the action of the power frequency electromagnetic field (wave) generating a power frequency electromagnetic field (wave) serving as the secondary radiation source that acts on the underwater ferromagnetic target nearby
Data Source
AI summary
Disclosed are an underwater ferromagnetic target detection method and system employing multiple power frequency radiation sources, pertaining to the technical field of non-acoustic underwater detection. The method includes: a power transmission network generating a power frequency electromagnetic field in a spatial range, and an underwater ferromagnetic target generating an electromagnetic field under the combined action of the power frequency electromagnetic field and seawater inside and outside the underwater ferromagnetic target; if there are multiple ships on the water serving as secondary radiation sources acting on the underwater ferromagnetic target, obtaining a secondary magnetic field generated by the underwater ferromagnetic target, and adding the secondary magnetic field and the electromagnetic field generated by the underwater ferromagnetic target under the combined action of the power frequency electromagnetic field and the seawater inside and outside the underwater ferromagnetic target to obtain a total electromagnetic field generated by the underwater ferromagnetic target; and acquiring a power frequency electromagnetic field distribution around the underwater ferromagnetic target, and performing underwater ferromagnetic target detection according to the power frequency electromagnetic field distribution. The present invention can enhance power frequency electromagnetic field signals of an underwater ferromagnetic target, and achieves underwater ferromagnetic target detection.