Magnetometer Calibration System Using Shared Magnetic Field Generation
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Solution Overview
Problem
Existing calibration methods for atomic magnetometers struggle with simultaneous and accurate calibration of multiple detectors in environments with changing external magnetic fields, leading to prolonged calibration times and inaccurate multi-detector magnetic field recording and tracing.
Innovation Solution
A calibration system and method using magnetic field signal sources that can act on all detectors simultaneously, allowing for continuous calibration of gain values, preventing crosstalk, and enabling accurate simultaneous recording and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual coils are used near each air chamber to generate calibration magnetic fields, then each detector can be calibrated, but simultaneous and accurate calibration of multiple detectors becomes difficult in changing external magnetic field environments
Solution Approach 1:
The system divides the calibration function into two parts: (1) a shared magnetic field generating device that creates a common calibration magnetic field for all detectors, and (2) individual coil assemblies that can be selectively activated. This segmentation allows most calibration to be performed simultaneously and accurately using the shared device, while individual coils provide fine-tuned local calibration when needed.
Solution Approach 2:
The patent introduces a calculation device as an intermediary that coordinates between the shared magnetic field generating device and individual detector systems. This intermediary processes calibration data, determines optimal calibration sequences, and ensures accurate gain calibration across all detectors by managing the complex interactions between multiple calibration sources and detectors.
2Measurement precision
If calibration is performed for each detector individually, then accurate calibration can be achieved, but calibration time increases significantly
Solution Approach 1:
The patent merges the calibration function into a shared magnetic field generating device that can simultaneously calibrate multiple detectors. By combining individual coil assemblies with this shared device, the system performs coordinated calibration across all detectors in a unified process, dramatically reducing total calibration time while maintaining accuracy through the calculation device's coordination.
Solution Approach 2:
The system enables continuous calibration operations by having the shared magnetic field generating device operate continuously to provide baseline calibration for all detectors, while individual coil assemblies provide supplemental calibration only when specific detectors require adjustment. This continuous operation eliminates idle time between sequential calibrations of individual detectors.
3Productivity
If a shared magnetic field generating device is used for all detectors, then simultaneous calibration is enabled, but adaptability to individual detector requirements decreases
Solution Approach 1:
The calibration system is segmented into a shared magnetic field generating device for global calibration and individual coil assemblies for local customization. This segmentation enables the system to efficiently perform simultaneous calibration using the shared device while retaining the flexibility to activate individual coils for detectors with specific calibration requirements, thus maintaining both speed and adaptability.
Solution Approach 2:
The system dynamically adjusts the calibration approach for each detector based on real-time requirements. The calculation device determines whether each detector needs calibration from the shared device alone or requires supplemental calibration from its individual coil assembly. This dynamic adaptation allows the system to optimize between simultaneous calibration efficiency and individual detector customization flexibility.
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 quick, simultaneous, and continuous calibration of multiple detectors, expanding the dynamic range of detection without sacrificing sensitivity, and improving the accuracy of multi-detector magnetic field recording and tracing.
Implementation Method 1
at least one magnetic field generating device having the position fixed relative to the magnetometers and being used to generate a calibration magnetic field
Data Source
AI summary
A calibration system for magnetometers includes magnetometers configured to measure a magnetic field to be measured; a magnetometer holder fixedly mounted on the magnetometer holder; at least one magnetic field generating device having its position fixed relative to the magnetometers, and used to generate a calibration magnetic field distribution in a space to be measured; and a calculation device configured to calculate the magnitudes of magnetic field vectors at the positions of the magnetometers according to the calibration magnetic field distribution generated by the at least one magnetic field generating device in the space to be measured, receive measured magnitudes of the magnetic field vectors from the magnetometers, and calculate detection gain values of the magnetometers on the basis of the calculated magnitudes of the magnetic field vectors and the measured magnitudes of the magnetic field vector.