Vertical Metal Detector Coil for Radar Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle-based detection systems for buried mines and booby traps face challenges in simultaneously detecting metallic and non-metallic objects due to the interference between ground radar and metal detectors, requiring complex navigation and limited depth of penetration for ground-penetrating radar.
Innovation Solution
A compact sensor unit combining ground radar and metal detector is created, where the metal detector's coil plane is vertically aligned to minimize interference with the ground radar, allowing for undisturbed propagation of electromagnetic waves and reducing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ground radar and metal detector are integrated in a compact sensor unit, then the integration effort and weight are reduced, but the metal detector may influence the functionality of the ground radar
Solution Approach 1:
The patent applies dimensional change by rotating the metal detector coil plane from horizontal to vertical orientation. This spatial reconfiguration in the vertical dimension allows the compact integration of both sensors while minimizing electromagnetic interference, as the vertical coil plane presents minimal radar cross-section to the horizontally polarized radar waves.
Solution Approach 2:
The patent changes the orientation parameter of the metal detector coil plane from horizontal to vertical. This parameter change fundamentally alters the electromagnetic interaction characteristics, reducing the radar scattering cross-section from a large horizontal surface to a minimal vertical edge, thereby resolving the interference issue while maintaining compact integration.
2Reliability
If the ground radar and metal detector are positioned at different points on the vehicle, then the two sensor systems do not influence each other, but the detection data must be referenced to one position requiring complex navigation systems
Solution Approach 1:
The patent merges the ground radar and metal detector into a single integrated sensor unit with common housing, mounting structure, and position reference. This combination eliminates the need for complex navigation systems to correlate data from separately positioned sensors, as both sensors now share the same physical location and orientation on the vehicle.
Solution Approach 2:
The integrated sensor unit serves multiple detection functions (metallic and non-metallic object detection) from a single positioned structure. This multi-functional design eliminates the need for separate positioning and navigation systems that would be required if the sensors were distributed at different vehicle locations.
3Measurement precision
If the coil plane of the metal detector is arranged horizontally, then metal objects perpendicular to the ground can be detected effectively, but the radar scattering cross-section increases causing multiple reflections that overlay useful signals
Solution Approach 1:
The patent rotates the coil plane from horizontal to vertical orientation, changing the spatial dimension of the metal detector structure. This vertical orientation presents minimal cross-section to the horizontally propagating radar waves, reducing radar scattering and multiple reflections while maintaining the ability to detect metal objects through the vertical magnetic field orientation.
Solution Approach 2:
The patent converts the potential harm of the metal detector coils acting as radar reflectors into a benefit by vertically orienting them. The vertical coil structure minimizes radar interference while still effectively detecting metal objects, thus transforming what could be a harmful interference source into a compatible integrated sensor configuration.
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
This configuration enhances detection sensitivity and reduces false alarm rates while enabling easier integration and weight savings for vehicle-mounted systems, allowing for effective detection of both metallic and non-metallic objects before the vehicle drives over them.
Implementation Method 1
A metal detector, in turn, consists of a group of coils that serve to excite and receive magnetic fields
Implementation Method 2
the ground radar, which is guided close above the ground, and the ground surface, which are known to be undesirable since they would overlay the useful signals from the ground
Implementation Method 3
When considering how to find ideas, it was assumed that it is advantageous for a ground radar (GPR-Ground Penetrating Radar) if it is subject to a low radar scattering cross-section
Data Source
Figure 1~2
Figure 3~5
Figure 3~5
AI summary
The invention relates to a combined ground penetrating radar (1) and metal detector (10) for detecting metal as well as non-metal type bodies (6) that can be found in the ground (8), in particular landmines and/or booby traps or the like. For this purpose, the ground penetrating radar and the metal detector are structurally combined with each other such that the surface normal (n) of the metal detector (10) points in the direction of the polarization of the electric field strength (E) of the transmitted or received radar pulse of the ground penetrating radar (1).