CW Radar Toroidal Antenna Saltwater Metal Detection
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Solution Overview
Problem
Current underwater detection technologies, such as magnetometers and sub-bottom sonar, are limited in their ability to detect and differentiate between ferrous and non-ferrous metals in saltwater environments, and they often suffer from interference and limited range.
Innovation Solution
A continuous-wave (CW) radar system that uses toroidal ring stacks and wire wrapping to induce an oscillating magnetic field, allowing for the detection of ferrous and non-ferrous metals in underwater environments by analyzing return signals from transmitter and receiver antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetometers and sub-bottom sonar are used for underwater detection, then detection capability is provided, but the ability to differentiate between ferrous and non-ferrous metals is limited and interference occurs
Solution Approach 1:
The patent divides the detection process into multiple frequency bands (e.g., 1 kHz and 10 kHz) to separately analyze ferrous and non-ferrous metal responses. By segmenting the electromagnetic spectrum into distinct frequency ranges, the system can differentiate between metal types that would otherwise be indistinguishable using a single frequency approach.
Solution Approach 2:
The system changes the operating frequency parameter of the electromagnetic transmitter to optimize detection of different metal types. By varying frequency as a key parameter, the radar can adjust its detection characteristics to enhance differentiation between ferrous and non-ferrous metals while reducing environmental interference.
2Length of stationary object
If electromagnetic waves are propagated through saltwater, then detection range is extended, but signal attenuation and interference increase
Solution Approach 1:
The system employs periodic transmission of electromagnetic pulses through the saltwater medium. By using periodic action with appropriate pulse intervals, the system allows the medium to recover between transmissions and minimizes cumulative heating effects, thereby reducing signal attenuation while maintaining extended detection range.
Solution Approach 2:
The patent replaces traditional acoustic sonar systems with electromagnetic radar systems. This substitution enables operation in saltwater environments with extended range, as electromagnetic waves at the selected frequencies experience different attenuation characteristics compared to acoustic waves, reducing energy loss over distance.
3Measurement precision
If continuous-wave radar system with toroidal ring stacks is implemented, then geolocation accuracy and metal identification capability are improved, but device complexity increases
Solution Approach 1:
The patent implements a nested configuration where multiple toroidal ring stacks are arranged concentrically, with each ring containing or supporting the next smaller ring. This nesting approach achieves the complex three-dimensional electromagnetic field requirements for accurate geolocation and metal identification while consolidating the physical structure into a compact, integrated unit that reduces overall system complexity.
Solution Approach 2:
The antenna system uses composite construction combining toroidal rings with wire wrapping techniques. This composite approach creates a structurally robust antenna that generates the required oscillating magnetic field while simplifying manufacturing and assembly compared to traditional complex antenna designs.
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 CW radar system effectively increases radar geolocation accuracy, enables the identification of metal types, determines the size and shape of targets, and maps objects onto 2D and 3D coordinate systems, while overcoming the limitations of existing technologies.
Implementation Method 1
A continuous-wave (CW) radar system that uses toroidal ring stacks and wire wrapping to induce an oscillating magnetic field
Implementation Method 2
analyzing return signals from transmitter and receiver antennas
Data Source
AI summary
The present invention includes systems and methods for a continuous-wave (CW) radar system for detecting, geolocating, identifying, discriminating between, and mapping ferrous and non-ferrous metals in brackish and saltwater environments. The radar system (e.g., the CW radar system) generates multiple extremely low frequency (ELF) electromagnetic waves simultaneously and uses said waves to detect, locate, and classify objects of interest. These objects include all types of ferrous and non-ferrous metals, as well as changing material boundary layers (e.g., soil to water, sand to mud, rock to organic materials, water to air, etc.). The radar system (e.g., the CW radar system) is operable to detect objects of interest in near real time.