Magnetic probe

Abstract

The utility model provides a magnetic probe, which comprises a magnetic probe framework, a coil and a cover plate, the coil is wound on the magnetic probe framework, the cover plate is detachably mounted on the periphery of the magnetic probe framework, so that the coil is accommodated between the magnetic probe framework and the cover plate when the cover plate is mounted, and the magnetic probe framework is arranged on the magnetic probe framework. The outer surface of the cover plate and / or the magnetic probe skeleton is provided with a positioning hole used for positioning the installation position of the magnetic probe. And the outer surface of the cover plate and / or the magnetic probe skeleton is provided with the positioning hole used for positioning the installation position of the magnetic probe. According to the scheme, the positioning precision of the installation position in the installation process of the magnetic probe is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear fusion, in particular to a magnetic probe. Background Art

[0002] Magnetic measurement is one of the most basic diagnostic systems for magnetic confinement fusion devices such as tokamaks and stellarators. Among them, the magnetic probe is an important part of magnetic measurement. A magnetic probe is a small solenoid coil installed in or at the boundary of a plasma. Its working principle is based on the law of electromagnetic induction. When the magnetic field in the space where the coil is located changes, due to the change in the magnetic flux passing through the cross-sectional area of the coil, an induced electromotive force will be generated at both ends of the coil for magnetic measurement. For the identification and feedback control of the plasma magnetic field configuration, and the research and active control of magnetohydrodynamic instabilities in magnetic confinement fusion devices, the magnetic probe is an important measurement means.

[0003] As an important diagnostic means for magnetic confinement fusion devices, the measurement accuracy of the magnetic probe will affect the accuracy of plasma magnetic field configuration reconstruction and feedback control, and affect the stable operation ability of the device. And high-precision positioning installation is an important factor to ensure the measurement accuracy of the magnetic probe system.

[0004] In related technologies, when installing a magnetic probe, a positioning measurement device is often used to measure and position the installation position of the magnetic probe by taking the screws on the magnetic probe as positioning marks. However, due to the machining errors of the screw holes themselves, the screws also have machining errors, and there are also installation errors during the screw installation process. Therefore, at least three errors are superimposed, which may lead to poor positioning accuracy of the installation position of the magnetic probe, and further may lead to poor measurement accuracy of the magnetic probe system, or even lead to incorrect measurement data of the magnetic probe system.

[0005] Therefore, how to improve the positioning accuracy of the installation position of the magnetic probe has become an urgent technical problem to be solved. Summary of the Utility Model

[0006] The embodiment of the utility model provides a magnetic probe to solve the technical problem of how to improve the positioning accuracy of the installation position of the magnetic probe.

[0007] To overcome the above technical problems, according to an embodiment of the utility model, a magnetic probe is provided, including: a magnetic probe skeleton, a coil, and a cover plate. Among them, the coil is wound around the magnetic probe skeleton, and the cover plate is detachably installed on the periphery of the magnetic probe skeleton to accommodate the coil between the magnetic probe skeleton and the cover plate when the cover plate is installed. Positioning holes for positioning the installation position of the magnetic probe are provided on the outer surface of the cover plate and / or the magnetic probe skeleton.

[0008] In one embodiment, the positioning holes are opened in the area on the top surface of the magnetic probe skeleton that is not covered by the cover plate.

[0009] In one embodiment, the top surface of the magnetic probe skeleton has a plurality of positioning blocks distributed in the edge area of the top surface; positioning holes are respectively formed in the surfaces of each positioning block.

[0010] In one embodiment, the positioning hole is a tapered blind hole.

[0011] In one embodiment, the magnetic probe skeleton includes a coil winding portion and cover plate support portions integrally formed at both ends of the coil winding portion. There are a plurality of cover plates, and the plurality of cover plates are installed on the cover plate support portions around the circumference of the coil winding portion.

[0012] In one embodiment, the cover plate support portion is provided with a cover plate installation groove, and a stepped space for accommodating the coil is formed between the groove bottom of the cover plate installation groove and the coil winding portion.

[0013] In one embodiment, the magnetic probe skeleton is a hexahedron, and the cover plates are respectively installed on the top, bottom and two side portions of the magnetic probe skeleton.

[0014] In one embodiment, a coil winding fixing portion is further provided at the bottom of the cover plate support portion.

[0015] In one embodiment, a lead wire groove is further provided at the bottom of the cover plate support portion, and the free lead wire end of the coil is led out from the lead wire groove.

[0016] In one embodiment, the magnetic probe skeleton is a ceramic skeleton, and the cover plate is a boron nitride cover plate.

[0017] The technical solution provided by the embodiment of the present utility model may include the following beneficial effects:

[0018] The magnetic probe provided by the present utility model has a cover plate detachably mounted on the magnetic probe skeleton, and the coil is encapsulated between the cover plate and the magnetic probe skeleton. Positioning holes are provided on the outer surface of the cover plate and / or the magnetic probe skeleton. During the process of mounting the magnetic probe on the inner wall of the vacuum chamber, these positioning holes are used for a positioning device to accurately position the mounting position of the magnetic probe. The positioning device measures the position coordinates of the positioning holes, and then determines the position coordinates of the center point of the magnetic probe based on the relative position relationship between the positioning holes and the center point of the magnetic probe. Based on this measurement principle, the accuracy of the relative position relationship between the positioning holes and the center point of the magnetic probe is the key to ensuring accurate measurement of the position of the magnetic probe. When processing the positioning holes on the outer surface of the cover plate and / or the outer surface of the magnetic probe skeleton, the accuracy of the relative position relationship between the positioning holes and the center point is only affected by the processing accuracy of the positioning holes. In the prior art, screws on the surface of the magnetic probe are used as positioning points. The accuracy of the relative position relationship between this positioning point and the center point is not only affected by the processing accuracy of the screw holes, but also affected by the processing accuracy of the screws. At the same time, it is also affected by the installation accuracy during the screw installation process. Therefore, the solution of providing positioning holes for positioning the mounting position of the magnetic probe on the outer surface of the cover plate and / or the magnetic probe skeleton in this application has a higher positioning accuracy for the mounting position during the installation process of the magnetic probe.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0021] Figure 1 is a schematic structural diagram of a magnetic probe shown according to an exemplary embodiment.

[0022] Figure 2 is a schematic structural diagram of a magnetic probe skeleton from a first perspective shown according to an exemplary embodiment.

[0023] Figure 3 is a schematic structural diagram of a magnetic probe skeleton from a first perspective shown according to an exemplary embodiment.

[0024] In the figure, 100 is the magnetic probe skeleton; 110 is the coil winding part; 120 is the cover plate support part; 121 is the cover plate installation groove; 122 is the lug; 130 is the coil winding fixing part; 140 is the lead wire groove; 200 is the cover plate; 300 is the positioning hole; 310 is the positioning block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than actual drawings, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] In the description of the present invention, unless otherwise clearly specified and defined, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] As Figures 1 - 3 shown, the present invention provides a magnetic probe, which includes a magnetic probe skeleton 100, a coil and a cover plate 200. Among them, the coil is wound around the magnetic probe skeleton 100, and the cover plate 200 is detachably installed on the periphery of the magnetic probe skeleton 100 to accommodate the coil between the magnetic probe skeleton 100 and the cover plate 200 when the cover plate 200 is installed. A positioning hole 300 for positioning the installation position of the magnetic probe is provided on the outer surface of the cover plate 200 and / or the magnetic probe skeleton 100.

[0029] In this embodiment, the cover plate 200 is detachably mounted on the magnetic probe skeleton 100, and the coil is encapsulated between the cover plate 200 and the magnetic probe skeleton 100. Positioning holes 300 are formed on the outer surface of the cover plate 200 and / or the magnetic probe skeleton 100. The positioning holes 300 are used to accurately position the installation position of the magnetic probe during the process of installing the magnetic probe on the inner wall of the vacuum chamber. Exemplarily, a multi-joint robotic arm can be used as the positioning device to measure the position coordinates of the positioning holes 300, and then determine the position coordinates of the center point of the magnetic probe based on the relative position relationship between the positioning holes 300 and the center point of the magnetic probe. Based on this measurement principle, the accuracy of the relative position relationship between the positioning holes 300 and the center point of the magnetic probe is the key to ensuring accurate measurement of the position of the magnetic probe. In this embodiment, the positioning holes 300 are machined on the outer surface of the cover plate and / or the outer surface of the magnetic probe skeleton 100, and the accuracy of the relative position relationship between the positioning holes 300 and the center point is only affected by the machining accuracy of the positioning holes 300. In the prior art, screws on the surface of the magnetic probe are used as positioning points. The accuracy of the relative position relationship between the positioning points and the center point is affected not only by the machining accuracy of the screw holes, but also by the machining accuracy of the screws. At the same time, it is also affected by the installation accuracy during the screw installation process. Therefore, the solution of providing the positioning holes 300 for positioning the installation position of the magnetic probe on the outer surface of the cover plate 200 and / or the magnetic probe skeleton 100 in this application has higher positioning accuracy for the installation position during the installation process of the magnetic probe.

[0030] In one embodiment, in order to further improve the positioning accuracy, the positioning holes 300 can be formed on the magnetic probe skeleton 100 and exposed on the outside. That is, after the cover plate 200 is installed, the positioning holes 300 are formed in the area on the surface of the magnetic probe skeleton 100 that is not covered by the cover plate 200. Exemplarily, the peripheral shape of one surface of the magnetic probe skeleton can be rectangular. Correspondingly, the cover plate 200 can be a rectangle lacking four corners, and the four corners of the magnetic probe skeleton 100 are not covered by the cover plate 200. Other shaped cover plates that can cover the coil and leave the area for forming the positioning holes on the top surface of the magnetic probe skeleton 100 are also applicable in this application. For example, a cover plate with the same peripheral rectangular shape as one surface of the magnetic probe skeleton and slightly smaller in size, and the uncovered area is the edge of one surface of the magnetic probe skeleton, is also applicable to the embodiment of this application.

[0031] Since the coil is wound around the magnetic probe skeleton 100, generally, the center point position of the magnetic probe skeleton 100 can be used as the center point position of the overall magnetic probe. By opening the positioning hole 300 on the magnetic probe skeleton 100, only by clarifying the dimensional parameters of the magnetic probe skeleton 100 and the position of the positioning hole 300 on the magnetic probe skeleton 100, the center point position can be obtained. Therefore, the positioning accuracy is only affected by the processing accuracy of the positioning hole 300 on the magnetic probe skeleton 100. It can prevent the influence of the cumulative error caused by the assembly accuracy error and the accessory processing error generated during the assembly of the magnetic probe.

[0032] In one embodiment, for the convenience of positioning device measurement, the positioning hole 300 is opened on the top surface of the magnetic probe skeleton 100. When the magnetic probe is installed on the inner wall of the vacuum chamber, the side that fits the inner wall of the vacuum chamber is the bottom surface, and the side opposite to the bottom surface is the top surface. In this embodiment, the bottom surface and the top surface are exemplarily illustrated for clearly describing the positional relationship, and the description of other positional relationships is equally applicable in this application.

[0033] In one embodiment, the positioning hole 300 may include a plurality of them. The distribution of the positioning holes 300 on the top surface of the magnetic probe skeleton 100 is as far away from the center position of the magnetic probe skeleton 100 as possible. Positioning is performed through the plurality of positioning holes 300 away from the center position to reduce the error of the relative positional relationship between the positioning hole 300 and the center point. In this embodiment, the magnetic probe skeleton 100 may include positioning blocks 310 distributed at the four corners of the top surface, and the corresponding positioning holes 300 are opened on the surfaces of the positioning blocks 310. In this embodiment, the positioning blocks 310 can also position the installation of the cover plate 200.

[0034] In one embodiment, for matching the measurement of the positioning device, the positioning hole 300 can be formed as a tapered blind hole.

[0035] In one embodiment, the magnetic probe skeleton 100 includes a coil winding portion 110 and cover plate support portions 120 integrally formed at both ends of the coil winding portion 110. There are a plurality of the cover plates 200, and the plurality of cover plates 200 are installed on the cover plate support portions 120 around the circumference of the coil winding portion 110. The cover plate support portions 120 are provided with cover plate installation grooves 121, and the cover plates 200 are detachably installed in the cover plate installation grooves 121. In one embodiment, screw holes are opened on the cover plates 200, and screw holes are also opened at the corresponding positions of the cover plate installation grooves 121. The cover plates 200 and the magnetic probe skeleton 100 are fixedly installed by screws.

[0036] The spatial shape of the magnetic probe skeleton 100 can be a hexahedron. Among them, the cover plate support parts 120 are located at both ends of the coil winding part 110. The coil winding part 110 has four faces, and each face corresponds to the installation of a cover plate 200. The cover plates 200 are respectively installed on the top, bottom and two sides. After installing the cover plate 200 on the top, the outer surface of the cover plate 200 on the top is flush with the outer surface of the positioning block 310. After installing the cover plates 200 on other faces, the outer surface of the cover plate 200 is flush with the surface of the exposed part of the magnetic probe skeleton 100 on this face.

[0037] There is a stepped space for accommodating the coil between the bottom of the cover plate installation groove 121 and the coil winding part 110, so as to reserve sufficient accommodation space for the coil.

[0038] In one embodiment, in order to ensure that the magnetic probe will not be damaged during baking and reduce the release of impurities during baking, the magnetic probe skeleton 100 can be a ceramic skeleton, such as an A95 ceramic skeleton. Other materials that meet the baking conditions, release less impurities, and are non-magnetic are also applicable. For example, a silicon material skeleton. The cover plate 200 is made of a boron nitride cover plate, which can prevent plasma from bombarding the inside of the magnetic probe. Similarly, other materials that meet the baking conditions, release less impurities, are non-magnetic, and do not release impurity gases when bombarded by plasma are also applicable. For example, a 304 stainless steel material cover plate.

[0039] In one embodiment, the thickness of the cover plate 200 located at the top of the magnetic probe skeleton 100 is greater than or equal to 2 mm, which can better prevent plasma from bombarding the inside of the magnetic probe.

[0040] In one embodiment, in order to facilitate coil winding, a coil winding fixing part 130 is further provided at the bottom of the cover plate support part 120. Specifically, fixing holes for fixing the winding wire during the coil winding process can be opened at the bottom of the cover plate support part 120. After inserting a pin / screw, etc. into the fixing holes, the winding wire is fixed, which is convenient for coil winding.

[0041] In one embodiment, a lead wire groove 140 is further provided at the bottom of the cover plate support part 120, and the free lead end of the coil is led out from the lead wire groove 140.

[0042] In one embodiment, a lug 122 integrally formed with the body of the magnetic probe skeleton 100 is further provided at the bottom of the magnetic probe skeleton 100. A screw hole is opened on the lug 122, and the magnetic probe is fixed on the inner wall of the vacuum chamber by a screw passing through the screw hole on the lug 122.

[0043] Other embodiments of the present utility model will be readily envisioned by those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present utility model that follow the general principles of the present utility model and include known common general knowledge or conventional technical means in the technical field not disclosed by the present utility model. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present utility model are pointed out by the following claims.

[0044] It should be understood that the present utility model is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A magnetic probe, characterized in that, Comprising: A magnetic probe skeleton (100), a coil, and a cover plate (200), wherein the coil is wound around the magnetic probe skeleton (100), and the cover plate (200) is detachably mounted around the magnetic probe skeleton (100) to accommodate the coil between the magnetic probe skeleton (100) and the cover plate (200) when the cover plate (200) is mounted. Positioning holes (300) for positioning the mounting position of the magnetic probe are provided on the outer surface of the cover plate (200) and / or the magnetic probe skeleton (100).

2. The magnetic probe according to claim 1, wherein The positioning holes (300) are opened in the area of the top surface of the magnetic probe skeleton (100) that is not covered by the cover plate (200).

3. The magnetic probe according to claim 1, characterized in that, The top surface of the magnetic probe skeleton (100) has a plurality of positioning blocks (310) distributed in the edge area of the top surface; the positioning holes (300) are respectively provided on the surface of each positioning block (310).

4. The magnetic probe according to any one of claims 1-3, characterized in that, The positioning holes (300) are tapered blind holes.

5. The magnetic probe according to claim 2 or 3, characterized in that, The magnetic probe skeleton (100) includes a coil winding portion (110) and cover plate support portions (120) integrally formed at both ends of the coil winding portion (110). There are a plurality of the cover plates (200), and the plurality of cover plates (200) are mounted on the cover plate support portions (120) around the circumference of the coil winding portion (110).

6. The magnetic probe according to claim 5, wherein the cover plate support portion (120) is provided with a cover plate mounting groove (121), and there is a step space for accommodating the coil between the bottom of the cover plate mounting groove (121) and the coil winding portion (110).

7. The magnetic probe according to claim 5, characterized in that, The magnetic probe skeleton (100) is a hexahedron, and the cover plates (200) are respectively mounted on the top, bottom, and two side portions of the magnetic probe skeleton (100).

8. The magnetic probe according to claim 7, characterized in that, A coil winding fixing portion (130) is further provided at the bottom of the cover plate support portion (120).

9. The magnetic probe according to claim 5, characterized in that, A lead wire groove (140) is further provided at the bottom of the cover plate support portion (120), and the free lead wire end of the coil is led out from the lead wire groove (140).

10. The magnetic probe according to claim 1, characterized in that, The magnetic probe skeleton (100) is a ceramic skeleton, and the cover plate (200) is a boron nitride cover plate.

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