Two-dimensional gradient magnetic field system with adjustable included angle between magnetic field direction and gradient direction
A technology of magnetic field direction and two-dimensional gradient, applied in the field of electromagnetic field, to achieve the effect of good linearity, good linearity of magnetic field, and accurate synthetic magnetic field
Active Publication Date: 2020-04-24
中国船舶重工集团有限公司第七一0研究所
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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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[0022] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0023] This embodiment provides a two-dimensional gradient magnetic field system with an adjustable angle between the direction of the magnetic field and the direction of the gradient, such as figure 1 As shown, it includes current source, longitudinal gradient coil and transverse gradient coil.
[0024] The direction of the magnetic field of the longitudinal gradient coil is the same as the direction of the magnetic field gradient, and the direction of the magnetic field of the transverse gradient coil is perpendicular to the direction of the magnetic field gradient; The center of the magnetic field work area of the coil and the transverse gradient coil coincides; the longitudinal gradient coil and the transverse gradient coil are each powered by a current source, and the synthetic magnetic field can be controlled by adjusting the magnitude and directio...
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The invention discloses a two-dimensional gradient magnetic field system with an adjustable included angle between a magnetic field direction and a gradient direction. The two-dimensional gradient magnetic field system comprises current sources, 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 magnetic field direction of the transverse gradient coil is perpendicular to the magnetic field gradient direction. The longitudinal gradient coil and the transverse gradient coil are combined and installed in a way in which the magnetic field gradient directions are the same and the magnetic field directions are orthogonal at 90 degrees, and the centers of magneticfield working areas of the longitudinal gradient coil and the transverse gradient coil coincide. The longitudinal gradient coil and the transverse gradient coil are each powered by one current source, and the direction of a resultant magnetic field and the gradient direction of the magnetic field can be controlled by adjusting the magnitude and direction of currents output to the gradient coils by the two current sources. According to the invention, the gradient direction of the magnetic field can be randomly adjusted in a two-dimensional space only by adjusting the magnitude and direction ofthe currents passing through the coils.
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...
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IPC IPC(8): G01R35/00
CPCG01R35/007
Inventor 翟晶晶李享张海波孟诚
Owner 中国船舶重工集团有限公司第七一0研究所