Magnetic Field Vector Differencing for Accurate Object Search
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Solution Overview
Problem
Existing magnetic exploration methods are hindered by the interference of magnetic materials other than the exploration objects, leading to inaccurate detection.
Innovation Solution
A magnetic exploration method and system that utilizes a movable first magnetic field sensor to measure magnetic field vectors, calculates vector differences with a reference magnetic field vector, and estimates the position of the exploration object based on these differences, employing a coordinate system and synchronized measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If magnetic field sensors are used to detect exploration objects containing magnetic materials, then the exploration capability is improved, but interference from other magnetic materials in the environment reduces measurement precision
Solution Approach 1:
The patent extracts and removes the interference component from the magnetic field measurements by calculating the difference between measured magnetic field vectors and reference magnetic field vectors. This differential measurement approach isolates the magnetic signal from the exploration object by eliminating background magnetic interference from surrounding magnetic materials.
Solution Approach 2:
The patent introduces reference magnetic field vectors as an intermediary element that mediates between the raw magnetic field measurements and the final exploration object detection. By comparing measured vectors against reference vectors obtained from areas without exploration objects, the system can identify and isolate the magnetic signature of the exploration object.
2Measurement precision
If multiple magnetic field sensors are deployed to improve measurement accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the magnetic field sensor multi-functional by using it for both measuring the magnetic field vectors at exploration points and calculating the reference magnetic field vectors. The same sensor type and measurement process serve dual purposes, eliminating the need for separate reference sensors and reducing overall system complexity.
Solution Approach 2:
The system performs self-calibration by using its own magnetic field sensor to measure and establish reference magnetic field vectors in the exploration area. The sensor serves itself to characterize the background magnetic environment, eliminating the need for external reference equipment or additional calibration devices.
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 approach allows for more accurate exploration of objects containing magnetic materials by minimizing interference from surrounding magnetic materials, enhancing the precision of position and size estimation.
Implementation Method 1
measuring magnetic field vectors at a plurality of measurement points in the coordinate system with a movable first magnetic field sensor
Data Source
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AI summary
To provide a system that can more accurately explore an exploration object. This method includes a step of setting a coordinate system in a exploration area where the an exploration object (MM) is estimated to be present, a step of measuring exploration magnetic field vectors of multiple measurement points in the coordinate system using a movable first magnetic field sensor (S51, S52), a step of measuring or calculating a reference magnetic field vector in the coordinate system in the exploration area (S53), a step of calculating the vector difference between each exploration magnetic field vector measured at the measurement points and the reference magnetic field vector (S54), and a step of estimating the position of the exploration object based on the vector difference for each measurement point (S55).