阅读说明：本技术 一种圆柱形径向开口的无矩线圈 (Cylindrical radial open-ended no square coil ) 是由 程华富 赵文纯 李小芳 逄路军 毛婧 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种圆柱形径向开口的无矩线圈,内部可用空间占磁屏蔽筒内部径向圆截面的比例能够提高到90％以上。其中线圈骨架为在圆柱侧面上所截柱状弧面,弧面对应的圆心角小于180°,绕组沿线圈骨架边缘绕制。线圈骨架分为外线圈骨架组和内线圈骨架组。外线圈骨架组包括两个尺寸相同的外线圈骨架,两个外线圈骨架上下相对设置,二者弧面对应的圆心重合。内线圈骨架组包括两个尺寸相同的内线圈骨架,内线圈骨架相对外线圈骨架同比缩小,两个内线圈骨架上下相对设置,二者弧面对应的圆心重合。同在上方的外线圈骨架和内线圈骨架平行同轴设置。同在下方的外线圈骨架和内线圈骨架平行同轴设置。(The invention discloses a cylindrical rectangular-free coil with a radial opening, wherein the proportion of the available internal space in the radial circular section of a magnetic shielding cylinder can be increased to more than 90%. The coil framework is a cylindrical arc surface cut on the side surface of the cylinder, the central angle corresponding to the arc surface is less than 180 degrees, and the winding is wound along the edge of the coil framework. The coil frame is divided into an outer coil frame group and an inner coil frame group. The outer coil framework group comprises two outer coil frameworks with the same size, the two outer coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped. The inner coil framework group comprises two inner coil frameworks with the same size, the inner coil frameworks are reduced in the same ratio relative to the outer coil framework, the two inner coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped. The outer coil framework and the inner coil framework which are arranged above the outer coil framework are arranged in parallel and coaxially. The outer coil framework and the inner coil framework which are arranged below the outer coil framework are arranged in parallel and coaxially.)

1. A cylindrical radial open-ended rectangular-free coil is characterized in that a coil framework is a cylindrical cambered surface truncated on the side surface of a cylinder, and a central angle corresponding to the cambered surface is equal toWinding is wound along the edge of the coil framework;

the coil framework is divided into an outer coil framework group and an inner coil framework group;

the outer coil framework group comprises two outer coil frameworks with the same size, the two outer coil frameworks are arranged oppositely up and down, and the corresponding circle centers of the cambered surfaces of the two outer coil frameworks are overlapped;

the inner coil skeleton group comprises two inner coil skeletons with the same size, the inner coil skeletons are reduced in the same ratio relative to the outer coil skeleton, the two inner coil skeletons are arranged oppositely up and down, and the corresponding circle centers of the cambered surfaces of the two inner coil skeletons are superposed;

the outer coil framework and the inner coil framework which are arranged above the outer coil framework are arranged in parallel and coaxially;

the outer coil framework and the inner coil framework which are arranged below the outer coil framework are arranged in parallel and coaxially.

2. The rectangular coil of claim 1, wherein said inner coil armature arc has a diameter d₁The diameter of the outer coil framework arc is d₂；

The axial length of the inner coil skeleton is a₁；

The axial length of the outer coil framework is a₂；

Wherein

3. The rectangular coil of claim 2, wherein said inner coil form has a radial spacing of b₁The radial distance of the outer coil framework is b₂(ii) a Then a₁＝b₁；a₂＝b₂。

4. The rectangular coil of claim 2, wherein said inner coil bobbin has w number of winding turns₁The number of turns of the winding on the outer coil framework is w₂(ii) a Then

5. The rectangular-free coil according to any one of claims 1 to 4, wherein the windings on the two outer coil bobbins are connected in series, the windings on the two inner coil bobbins are connected in series, and the windings on the outer coil bobbin are reversely connected in series with the windings on the inner coil bobbins.

Technical Field

The invention relates to the technical field of magnetometric test, in particular to a cylindrical radial-opening rectangular-free coil.

Background

In the magnetic metrology testing technology and the application research thereof, the use of the magnetic field coil is generally not opened. In the field of weak magnetic field measurement and test technology, a form of a magnetic shielding cylinder and a rectangular-free coil is often used for reproducing a weak magnetic field. In most occasions, the opening of the non-rectangular coil is in the axial direction of the magnetic shielding cylinder, and the use requirement can be met by reproducing the axial magnetic field. In some special cases, it is necessary to reproduce the radial magnetic field simultaneously. Since most of the magnetic shield cylinders are cylindrical, if a rectangular coil of a common structure is employed, the inner available space does not exceed 50% of the radial circular cross section of the inside of the magnetic shield cylinder. The manufacturing cost of the magnetic shielding cylinder is basically proportional to the volume, and the occupied ratio of the available internal space is low, which means that the magnetic shielding cylinder with larger volume and higher cost needs to be manufactured under the same internal space requirement.

At present, no design scheme of a rectangular coil exists for a cylindrical magnetic shielding cylinder, so that the available internal space exceeds 50% of the radial circular cross section of the magnetic shielding cylinder.

Disclosure of Invention

In view of this, the invention provides a rectangular-free coil with a cylindrical radial opening, and the proportion of the internal available space in the radial circular section of the magnetic shielding cylinder can be increased to more than 90%.

In order to achieve the purpose, the technical scheme of the invention is as follows: a cylindrical radial non-rectangular coil is characterized in that a coil framework is a cylindrical arc surface cut on the side surface of a cylinder, and a central angle corresponding to the arc surface is equal toThe winding is wound along the edge of the coil framework.

The coil frame is divided into an outer coil frame group and an inner coil frame group.

The outer coil framework group comprises two outer coil frameworks with the same size, the two outer coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped.

The inner coil framework group comprises two inner coil frameworks with the same size, the inner coil frameworks are reduced in the same ratio relative to the outer coil framework, the two inner coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped.

The outer coil framework and the inner coil framework which are arranged above the outer coil framework are arranged in parallel and coaxially.

The outer coil framework and the inner coil framework which are arranged below the outer coil framework are arranged in parallel and coaxially.

Further, the diameter of the inner coil framework arc is d₁The diameter of the outer coil framework arc is d₂(ii) a Axial length of inner coil bobbin is a₁(ii) a The axial length of the outer coil skeleton is a₂(ii) a Wherein

Further, the radial distance of the inner coil skeleton is b₁The radial distance of the outer coil skeleton is b₂(ii) a Then a₁＝b₁；a₂＝b₂。

Furthermore, the number of winding turns on the inner coil framework is w₁The number of turns of the winding on the outer coil framework is w₂(ii) a Then

Furthermore, the windings on the two outer coil frameworks are connected in series, the windings on the two inner coil frameworks are connected in series, and the windings on the outer coil frameworks are connected with the windings on the inner coil frameworks in reverse series.

Has the advantages that:

the invention provides a cylindrical rectangular-free coil with a radial opening, wherein a radial outer winding group of the rectangular-free coil is in an arc mode and is tightly attached to a radial circular ring of an inner space of a magnetic shielding cylinder; the radial inner winding of the rectangular-free coil is also in an arc shape and is tightly attached to the outer edge of the working area space in the magnetic shielding cylinder, and the available internal space is increased to more than 90% from 50% which is not more than the radial circular section in the magnetic shielding cylinder.

Drawings

FIG. 1 is an effect of a cylindrical radially open rectangular-free coil of the present invention;

FIG. 2 is a side view of a cylindrical radially open rectangular-free coil of the present invention;

fig. 3 is a perspective view of a cylindrical radial opening rectangular-free coil of the present invention.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides a cylindrical radial moment-free coil, as shown in figures 1 and 2, a coil framework is a cylindrical cambered surface truncated on the side surface of a cylinder, and a central angle corresponding to the cambered surface is equal to(about 51.3 °); the winding is wound along the edge of the coil framework.

The coil frame is divided into an outer coil frame group and an inner coil frame group.

The outer coil framework group comprises two outer coil frameworks with the same size, the two outer coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped.

The inner coil framework group comprises two inner coil frameworks with the same size, the inner coil frameworks are reduced in the same ratio relative to the outer coil framework, the two inner coil frameworks are arranged oppositely from top to bottom, and the circle centers corresponding to the two cambered surfaces are overlapped.

The outer coil framework and the inner coil framework which are arranged above the outer coil framework are arranged in parallel and coaxially.

The outer coil framework and the inner coil framework which are arranged below the outer coil framework are arranged in parallel and coaxially.

The diameter of the inner coil skeleton arc is d₁The diameter of the outer coil framework arc is d₂(ii) a Axial length of inner coil bobbin is a₁(ii) a The axial length of the outer coil skeleton is a₂(ii) a WhereinThe coil framework is a cylindrical cambered surface cut on the side surface of the cylinder, and the axial direction of the coil framework is the axial direction of the cylinder.

The radial distance of the inner coil skeleton is b₁The radial distance of the outer coil skeleton is b₂(ii) a Then a₁＝b₁；a₂＝b₂. Because the coil framework is a cylindrical cambered surface cut on the side surface of the cylinder, the radial distance of the coil framework is the distance between two side edges of the cambered surface.

The number of turns of the winding on the inner coil framework is w₁The number of turns of the winding on the outer coil framework is w₂(ii) a Then

The windings on the two outer coil frameworks are connected in series, the windings on the two inner coil frameworks are connected in series, and the windings on the outer coil frameworks are connected with the windings on the inner coil frameworks in series in the reverse direction.

The rectangular coil is arranged in the cylindrical magnetic shielding cylinder, and the available space in the rectangular coil can be increased to more than 90% from 50% which is not more than the radial circular section in the magnetic shielding cylinder.

The three-dimensional structure of the cylindrical radial-opening rectangular-free coil is shown in fig. 3.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.