Synchronized Metal Detector Timing Circuits for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Metal detectors cannot operate in close proximity due to interference from overlapping electromagnetic fields and have limited detection depth due to the size of their search coils, making it difficult to use them in confined spaces or for deeper penetration.
Innovation Solution
Synchronizing the transmit/receive timing circuits of metal detectors using GPS or other communication interfaces, such as satellite, radio, or cable links, to eliminate interference and increase detection depth by using a ground loop system that generates a larger magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple metal detectors operate in close proximity, then coverage area is increased, but electromagnetic interference between detectors occurs
Solution Approach 1:
The patent implements periodic action by using time-division multiplexing where multiple metal detectors transmit and receive signals in alternating time slots. Each detector is assigned a specific time window during which it actively transmits, while other detectors are in a receiving or idle state. This periodic activation pattern ensures that only one detector is transmitting at any given moment, eliminating electromagnetic interference between multiple detectors operating in close proximity while maintaining comprehensive coverage area.
2Measurement precision
If search coil size is increased, then detection depth is improved, but device portability is reduced
Solution Approach 1:
The patent applies dimensionality change by transitioning from a single large search coil to multiple smaller search coils arranged in a spatial configuration. Instead of relying on one large coil to achieve deep detection, the system uses several smaller coils positioned at different locations and depths. This distributed arrangement allows the system to achieve equivalent or superior detection depth while maintaining portability, as each individual coil remains compact and manageable.
Solution Approach 2:
The patent implements segmentation by dividing the detection function across multiple independent search coils rather than using a single large coil. Each coil is a separate, portable unit that can be independently positioned and adjusted. This segmentation allows the system to achieve deep detection capability through the collective action of multiple smaller coils while preserving the portability and ease of operation of each individual coil unit.
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 multiple metal detectors to operate in close proximity without interference and achieves deeper penetration, allowing for more efficient coverage and detection of metal objects at greater depths.
Implementation Method 1
If a piece of electrically conductive metal is proximate the coil, eddy currents are induced in the metal by the alternating magnetic field and this produces an alternating magnetic field of its own
Implementation Method 2
eddy currents are induced in the metal by the alternating magnetic field and this produces an alternating magnetic field of its own
Implementation Method 3
The coil, or in some forms a second coil, of the metal detector may then measure this magnetic field emanating from the metal object by way of acting as a magnetometer
Implementation Method 4
using a ground loop system that generates a larger magnetic field
Data Source
AI summary
The present application relates to the field of metal detectors, which may find military, industrial and civilian application. In one form, the present application relates to a method and apparatus for a metal detection system in which a first component is synchronized with a second component. The metal detection system is adapted for use in diminishing interference between two or more metal detectors operating in close proximity. In one form, the metal detection system is adapted for use in a ground loop metal detection system that allows for the detection of metal or metallic objects at greater depths than currently available with standard pulse induction or induction type metal detecting equipment.