Magnetic gradiometer with adjustable baseline distance of sensor array

Abstract

The invention provides a magnetic gradiometer with an adjustable baseline distance of a sensor array, and mainly solves the problems that a traditional magnetic gradiometer is not flexible enough andnot high in applicability. The magnetic gradiometer with the adjustable baseline distance of the sensor array can rotate around three degrees of freedom to adjust the position of the magnetic sensor after the magnetic sensor is installed. Through multiple measurements and adjustments, misalignment errors of the measurement structure can be accurately calibrated. The aim of reducing the costs of anexperiment while accurately calibrating the misalignment errors of the magnetic gradiometer is achieved. The invention is a magnetic gradiometer that can be used to design a three-dimensional sensorarray such as a regular hexahedron with an adjustable baseline distance. At the same time, a magnetic gradiometer that makes a sensor array as a unit for structural expansion, and can be used for designing the cooperative use of multiple sensor arrays is provided.

Description

technical field [0001] The invention relates to a magnetic gradiometer with adjustable baseline distance of a sensor array, which belongs to the field of magnetic target detection. Background technique [0002] The application field of magnetic target detection using magnetic gradiometer is very wide, and it has been paid more and more attention and researched by more and more people. In the field of medical research, it can be used for capsule endoscope positioning, tumor positioning, surgical robot navigation, magnetic brain research, etc.; in the field of geophysics, it can be used for cave mapping, oil and gas and mineral exploration, archaeological exploration, and earth magnetic field monitoring; in military In the field of engineering, it can be used for submarine detection, ship detection, unexploded ordnance detection, etc. The working principle of the magnetic gradiometer is to form an array of several magnetic sensors, and post-processing after data collection. ...

AI Technical Summary

Problems solved by technology

[0004] 1. The baseline of the magnetic sensor array is fixed. Under the required detection accuracy, the detection range is fixed, lacks flexibility, and is not widely applicable.

[0005] At present, the baseline distance of the sensor array of the magnetic gradiometer used at home and abroad is mostly fixed, and the detection range of the gradiometer is determined and cannot be changed.

If the magnetic target is too far or too close at this time, the detection error will be very large, which cannot meet the detection accuracy requirements

If you want to detect at this time, you need to redesign the baseline distance of the magnetic sensor array and remake the magnetic gradiometer, wasting a lot of time and cost

Such a magnetic gradiometer is not flexible enough, and its applicability is not strong

[0006] 2. The magnetic gradiometer cannot correct the misalignment error on the mechanical structure, and the method of correcting the misalignment error by obtaining the error parameters requires expensive cost

However, the above method requires a high-precision magnetic field generator to generate a magnetic field with a stable amplitude, and at the same time to generate a uniform magnetic field that can cover the entire measurement structure, which is very expensive.

Images