A two-dimensional gradient magnetic field system with adjustable angle between magnetic field direction and gradient direction

Abstract

The invention discloses a two-dimensional gradient magnetic field system with an adjustable angle between the magnetic field direction and the gradient direction, which includes a current source, a longitudinal gradient coil and a transverse gradient coil; the magnetic field direction of the longitudinal gradient coil is the same as the magnetic field gradient direction, and the transverse gradient coil The direction of the magnetic field is perpendicular to the direction of the magnetic field gradient; the longitudinal gradient coil and the transverse gradient coil are installed in the same magnetic field gradient direction, and the magnetic field direction is 90° orthogonal, and the center of the magnetic field work area of ​​the longitudinal gradient coil and the transverse gradient coil coincides; the longitudinal gradient coil and the Each transverse gradient coil is powered by a current source, and the direction of the synthetic magnetic field and the direction of the magnetic field gradient can be controlled by adjusting the magnitude and direction of the output current of the two current sources to the gradient coil. The invention can realize arbitrary adjustment of the magnetic field gradient direction in two-dimensional space only by adjusting the magnitude and direction of the current passing through the coil.

Description

technical field [0001] The invention belongs to the field of electromagnetic fields, and in particular relates to a two-dimensional gradient magnetic field system with an adjustable angle between a magnetic field direction and a gradient direction. Background technique [0002] The gradient magnetic field system is used to generate a magnetic field whose magnetic field value changes linearly in the working area. The magnetic field whose magnetic field value changes linearly is called a gradient magnetic field. The gradient magnetic field is mainly used for gradient magnetic fuzes, gradient magnetometers, and atomic formulas. Calibration and testing of magnetometers, magnetic tensor gradient instruments and other equipment, as well as medical and biological experiments in a gradient magnetic field environment. [0003] The gradient magnetic field system generally consists of a current source and a gradient magnetic field coil. The current source supplies power to the gradient...

AI Technical Summary

Problems solved by technology

For large-scale test items that are difficult to rotate, such as biological incubators, or equipment that needs to change the direction of the magnetic field gradient frequently, this kind of fixed gradient magnetic field device is very inconvenient to use.

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