Magnetic Sensor System With Fixed Scalar Magnetometers
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Solution Overview
Problem
Conventional magnetic sensor assemblies for detecting subsurface ferromagnetic materials face challenges due to the limited operational range of magnetometers, which requires mechanical reorientation systems to maintain accuracy, adding complexity and risking system failure.
Innovation Solution
A magnetic sensor system comprising multiple scalar point-sensor magnetometers with fixed axes, allowing at least one axis to remain within its operational range at any given time, along with a computer processor to determine which signal to use based on angle and signal strength, eliminating the need for mechanical reorientation systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnetometer is used with limited operational range, then the device complexity is reduced, but the reliability of magnetic sensing deteriorates when the magnetometer axis angle exceeds its operational range
Solution Approach 1:
The patent divides the sensing function into multiple magnetometers (first, second, and third magnetometers), each with its own axis oriented at different angles. This segmentation allows the system to maintain reliable sensing across a wider range of orientations by distributing the sensing capability across multiple independent sensors rather than relying on a single magnetometer.
Solution Approach 2:
Each magnetometer is positioned and oriented to detect magnetic field variations in specific directional ranges. The first magnetometer detects variations in a first direction, the second in a second direction, and the third in a third direction. This local quality approach ensures that each sensor operates within its optimal angular range while collectively providing comprehensive coverage.
2Reliability
If mechanical reorientation systems are added to maintain magnetometer within operational range, then the reliability of magnetic sensing is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and eliminates the mechanical reorientation system from the design. Instead of using mechanical components to adjust the magnetometer's orientation, the invention uses multiple magnetometers with fixed, pre-oriented axes to achieve the same reliability goal through a simpler, more robust configuration.
Solution Approach 2:
The patent replaces the mechanical reorientation system with an optical/electromagnetic solution using multiple magnetometers. Rather than mechanically adjusting a single sensor, the system uses multiple sensors with different fixed orientations to capture magnetic field data, substituting mechanical complexity with a distributed sensing approach.
3Adaptability or versatility
If multiple magnetometers with different axes are used to extend operational range, then the adaptability to different orientations is improved, but the device complexity increases
Solution Approach 1:
The patent implements multi-functionality by having multiple magnetometers perform the same basic function of detecting magnetic field variations, but each optimized for specific angular ranges. The first, second, and third magnetometers collectively provide universal detection capability across all orientations, with each sensor contributing to the overall system's versatility.
Solution Approach 2:
The patent extends the operational range by adding a dimensional aspect of orientation diversity. Instead of a single magnetometer axis, the system uses multiple axes arranged at different angles, effectively adding angular dimensionality to the sensing capability. This allows the system to adapt to magnetic field orientations in three-dimensional space more effectively.
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 ensures continuous and accurate detection of local variations in the ambient magnetic field without mechanical complexity, enhancing the reliability and operational range of magnetic sensor systems.
Implementation Method 1
magnetic sensor systems may be used to detect bodies of subsurface ferromagnetic material... magnetometer capable of detecting local variations in the ambient magnetic field
Data Source
AI summary
Magnetic sensor system including an assembly comprising first, second, and third scalar point-sensor magnetometers being fixedly mounted with respect to one another such that the position of each magnetometer's axis is invariable with respect to the other magnetometers' axes. When the sensor assembly is in operation, each magnetometer's axis forms an angle with ambient magnetic field lines. Each magnetometer has an operating range defined with respect to a range of values of the angle formed by its axis and the ambient magnetic field. The magnetometers are positioned such that at least one of magnetometers is within its operating range at any point in time. Each magnetometer has an output signal. Computer processor determines which of the output signals is to be used any particular point in time in the sensing of local variations in the ambient magnetic field. Method of operation of the magnetic sensor system/assembly is disclosed.