Geomagnetic Vector Measurement With Rotatable Probe Calibration
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Solution Overview
Problem
Existing airborne magnetic vector measurement systems using manned helicopters or fixed-wing aircraft lack a perfect calibration scheme, leading to unsatisfactory measurement accuracy due to rigid installation of magnetometers and attitude instruments, which hinders precise determination of magnetic vector parameters.
Innovation Solution
An integration and calibration method for geomagnetic vector measuring devices involving a cross-shaped frame structure with rotatable sleeves, magnetic probes, and attitude instruments, along with a spherical coordinate system to detect and correct spatial relationships, enabling accurate conversion of magnetic data into geographical coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetometer and attitude instrument are rigidly installed on aircraft through hard brackets, then the device structure is simple and stable, but the measurement accuracy is not satisfactory due to lack of perfect calibration scheme
Solution Approach 1:
The patent introduces a rotatable sleeve mechanism that allows the magnetic probe to rotate relative to the attitude instrument, replacing the rigid fixed installation. This dynamic adjustment capability enables precise calibration of the spatial relationship between the magnetic probe and attitude instrument, thereby improving measurement accuracy while maintaining operational flexibility
Solution Approach 2:
The patent implements a calibration process before actual measurement operations. The rotatable sleeve is adjusted to specific positions, and calibration data is collected to establish the precise spatial transformation relationship between the magnetic probe coordinate system and attitude instrument coordinate system. This preliminary calibration action ensures high measurement accuracy in subsequent operations
2Ease of operation
If three-axis fluxgate magnetometer is used for field observation with rigid installation, then the device is easy to operate, but the precise determination of magnetic vector parameters requires additional attitude instrument and equipment
Solution Approach 1:
The patent combines the magnetometer and attitude instrument into a single integrated measurement system. The magnetic probe and attitude instrument are mounted on the same platform with the rotatable sleeve connecting them, allowing simultaneous measurement of magnetic field parameters and attitude information. This merging eliminates the need for separate calibration equipment and simplifies the overall system operation
Solution Approach 2:
The integrated system performs multiple functions: the attitude instrument provides orientation data, the magnetic probe measures magnetic field parameters, and the rotatable sleeve enables both calibration and measurement operations. This multi-functional design reduces the need for additional separate equipment while maintaining ease of operation
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 method significantly enhances measurement accuracy, allowing for both aerial and ground geomagnetic vector measurements, simplifying the system, and improving exploration effectiveness by stabilizing attitude automatically.
Implementation Method 1
arranging magnetic probes at upper and lower ends of a cross-shaped frame of integrated magnetic vector measuring equipment main body
Implementation Method 2
a rotatable sleeve is arranged at a middle and lower part of a vertical pipe of the cross-shaped frame structure
Data Source
AI summary
An integration and calibration method of geomagnetic vector measuring device for exploration is provided and includes: S1, designing a magnetic vector measuring equipment main body as a cross-shaped frame structure; S2, arranging magnetic probes at upper and lower ends of a cross-shaped frame; S3, detecting a rotation relationship between three magnetic axis coordinates of each of the magnetic probes and three-axis coordinates of an attitude instrument; S4, correcting and calculating detected parameters. The disclosure solves the problem in prior art, magnetometers and attitude meters are rigidly installed on an airplane through devices such as hard brackets, and the measurement accuracy is not high because there is no perfect calibration scheme without matching. The disclosure greatly improves the accuracy of geomagnetic vector measurement, and can carry out aerial magnetic vector and vertical gradient measurement of magnetic vectors, and be used for ground geomagnetic vector measurement, and has higher practicability.