Inverse Estimation Radius Calculation for Ferromagnetic Target Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional acoustic detection methods for underwater ferromagnetic targets, such as shipwrecks and mines, face challenges like false alarms due to seabed topography and high background noise, making large-distance detection difficult and costly.
Innovation Solution
An inverse estimation-based radius calculation method using power frequency electromagnetic waves to detect ferromagnetic targets by simulating a scale model and measuring disturbance signals, allowing for the calculation of detection radius through empirical formulas considering air and sea water attenuation coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acoustic detection methods are used to detect underwater ferromagnetic targets, then detection capability is provided, but false alarms increase due to seabed topography and background noise
Solution Approach 1:
The patent replaces acoustic detection mechanisms with electromagnetic field-based detection. Specifically, it uses power frequency electromagnetic waves to interact with ferromagnetic targets, generating measurable disturbance signals that indicate target presence. This substitution eliminates the harmful interaction between acoustic waves and seabed topography, thereby reducing false alarms while maintaining detection capability.
Solution Approach 2:
The patent changes the detection parameter from acoustic wave properties to electromagnetic field properties. By measuring the disturbance of power frequency electromagnetic waves caused by ferromagnetic targets, the system achieves more reliable detection. The disturbance signal characteristics (amplitude, frequency, duration) serve as new detection parameters that are less susceptible to environmental interference.
2Area of stationary object
If acoustic detection arrays are deployed to detect underwater targets, then detection coverage is improved, but system cost increases significantly
Solution Approach 1:
The patent replaces complex acoustic detection arrays with a simpler electromagnetic field-based detection system. Instead of requiring multiple hydrophones and signal processing units, the system uses the disturbance of power frequency electromagnetic waves by ferromagnetic targets to achieve detection. This reduces device complexity while maintaining or improving detection coverage.
Solution Approach 2:
The patent exploits the inherent property of ferromagnetic targets to disturb power frequency electromagnetic waves. The target itself generates the detection signal through its interaction with the electromagnetic field, eliminating the need for active acoustic transmitters and multiple detection arrays. This self-service approach reduces system complexity and cost.
3Length of stationary object
If acoustic detection is used for large-distance detection, then detection range is extended, but performance deteriorates due to background noise
Solution Approach 1:
The patent substitutes acoustic detection with electromagnetic field detection for large-distance underwater target detection. Power frequency electromagnetic waves can propagate through water with less attenuation and interference over long distances compared to acoustic waves. The disturbance signals generated by ferromagnetic targets remain detectable at extended ranges, overcoming the background noise limitation of acoustic detection.
Solution Approach 2:
The patent changes the detection mechanism from acoustic wave propagation to electromagnetic field interaction. By measuring the disturbance of power frequency electromagnetic waves, the system achieves better signal-to-noise ratio at long distances. The electromagnetic field-based approach provides more stable detection performance in noisy marine environments compared to acoustic detection.
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
Enables precise large-distance wide-range detection of ferromagnetic targets concealed by sea noise, improving detection accuracy and reducing costs by utilizing low-frequency electromagnetic waves with high penetrating capabilities.
Implementation Method 1
The power frequency electromagnetic waves have high penetrating performance, and can penetrate the sea to act on a ferromagnetic target
Implementation Method 2
The ferromagnetic target may generate disturbance to the power frequency electromagnetic waves
Data Source
AI summary
Disclosed is an inverse estimation-based radius calculation method and system for ferromagnetic target detection. The calculation method includes a data acquisition step and a ferromagnetic target detection radius calculation step. Distrubance of a scale model to power frequency electromagnetic waves is used to inversely estimate a corresponding ferromagnetic target detection radius. Inverse estimation is performed separately for an air layer and a sea water layer according to test results of multiple scale model tests and in consideration of both a stationary state and a motion state of the scale model, so as to acquire a ferromagnetic target detection radius calculation formula. Weights of factors such as mass, speed, depth, and height are great in inverse estimation, so that inverse estimation precision is improved. The majority of background noise interference can be screened out of the power frequency electromagnetic waves.