Mobile foldable flexible electromagnetic field stirrer

Abstract

The present application relates to a mobile foldable flexible electromagnetic field stirrer. The mobile foldable flexible electromagnetic field stirrer comprises a stirrer base, at least two rotating shafts, a rotating shaft sleeve, flexible blades and a blade sleeve. The stirrer base is internally provided with a motor. The two rotating shafts are connected together by means of the rotating shaft sleeve. One of the two rotating shafts is connected to the stirrer base and is driven to rotate by the motor. The flexible blades are connected to the rotating shaft by means of the blade sleeve. The flexible blades are foldable and are made of flexible material.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic reverberation chamber testing, and more particularly to a mobile, foldable, flexible electromagnetic field stirrer. Background Technology

[0002] For electromagnetic reverberation chambers, electromagnetic field stirring technology is crucial to achieving the required electromagnetic field uniformity. When the reverberation chamber contains complex structures such as drones or aircraft components, traditional fixed electromagnetic stirrers struggle to adequately stir areas obscured by these structures. Furthermore, traditional electromagnetic stirrers, due to their large size and weight, are generally fixed and difficult to move, hindering the ability to fine-tune the electromagnetic field uniformity in specific areas through flexible placement. Finally, the high-speed rotating metal blades of the electromagnetic stirrer pose a potential safety threat to operators, the tested object, and the reverberation chamber walls.

[0003] Existing electromagnetic field stirrers for reverberation chambers are mainly fixed, with metal blades. These stirrers are characterized by their immobility and the need for a large safety distance to allow for blade rotation. This safety distance requirement, in particular, means that conventional electromagnetic field stirrers are typically placed in a corner of the reverberation chamber to leave sufficient testing space. However, for complex test objects such as drones and aircraft structural components, immobile electromagnetic field stirrers struggle to adequately stir the electromagnetic field within the area obstructed by the aircraft. Using movable metal-bladed electromagnetic field stirrers close to the aircraft poses a significant safety hazard due to their high-speed rotation, potentially scratching the aircraft and injuring personnel. Furthermore, multiple sets of movable electromagnetic field stirrers at different heights need to be customized to form an electromagnetic field stirrer array, placed around the test object or under certain structures, resulting in poor applicability of these stirrers. Summary of the Invention

[0004] One objective of this invention is to provide an electromagnetic field stirrer that overcomes at least some of the shortcomings of the prior art. It can solve the problem of difficulty in controlling the electromagnetic field uniformity in the shielded area when testing complex objects, and it can also solve the problem that the metal blades of the stirrer may cause damage to the aircraft and test personnel when rotating at high speed.

[0005] The above-mentioned objective of the present invention is achieved by a mobile, foldable, flexible electromagnetic field stirrer, which includes a stirrer base, at least two rotating shafts, a rotating shaft sleeve, flexible blades, and a blade sleeve. The stirrer base has a built-in motor, the two rotating shafts are connected together by the rotating shaft sleeve, one of the two rotating shafts is connected to the stirrer base and is driven to rotate by the motor, the flexible blade is connected to the rotating shaft by the blade sleeve, and the flexible blade is foldable and made of flexible material.

[0006] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: it can solve the problem of difficulty in controlling the electromagnetic field uniformity in the shielded area when testing complex objects, and it can also solve the problem that the metal blades of the stirrer may cause damage to the aircraft and test personnel when rotating at high speed.

[0007] Preferably, the flexible blade is made of conductive fiber cloth.

[0008] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through the flexible blades of a suitable material (conductive fiber cloth), a better electromagnetic field stirring effect can be achieved.

[0009] Preferably, the flexible blade is made of fiber cloth as the substrate and is coated with an electroplated metal layer to form a conductive fiber cloth.

[0010] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through a suitable flexible blade forming method (fiber cloth + electroplating), conductive fiber cloth can be formed to constitute flexible blades.

[0011] Preferably, the flexible blade has a supporting frame at its fold.

[0012] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blades can be easily folded or unfolded along the support frame, and large-area collapse of the flexible blades can be avoided after unfolding.

[0013] Preferably, there are multiple support frames, and the spacing between two adjacent support frames is equal.

[0014] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: it improves the foldability of the flexible blades and ensures that each fold of the flexible blades is basically the same after folding, thereby achieving a better electromagnetic field stirring effect.

[0015] Preferably, the movable, foldable, flexible electromagnetic stirrer further includes a sleeve connector for connecting the shaft sleeve and / or the blade sleeve to the shaft.

[0016] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through the sleeve connector, the rotating shaft sleeve can be connected to the rotating shaft (for example, two adjacent rotating shafts), and the blade sleeve can also be connected to the rotating shaft.

[0017] Preferably, the number of rotating shafts can be increased or decreased according to actual usage needs, and the rotating shafts have at least one row of threaded holes along the axial direction.

[0018] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the number of rotating shafts can be increased or decreased according to the stirrer height required for actual use, for example, two rotating shafts, three rotating shafts, four rotating shafts, etc., and each pair of adjacent rotating shafts are connected by a rotating shaft sleeve.

[0019] Preferably, the sleeve connector includes bolts and nuts, thereby connecting the shaft sleeve and / or the blade sleeve to the shaft.

[0020] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the bolt can be inserted into the rotating shaft through the threaded hole on one side of the rotating shaft, and then out through the threaded hole on the other side of the rotating shaft. The corresponding rotating shaft sleeve and / or blade sleeve are also provided with through holes for the bolt to be inserted and out. The bolt after being inserted is tightened by a nut, so that the rotating shaft sleeve and / or blade sleeve are connected to the rotating shaft.

[0021] Preferably, the mobile, foldable, flexible electromagnetic field stirrer further includes a blade-sleeve connector for connecting the flexible blades to the blade sleeve.

[0022] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blades can be effectively connected to the blade sleeve through the blade-sleeve connector.

[0023] Preferably, the flexible blade has a hole at its center for the shaft to pass through, and the blade-sleeve connector includes a connecting ring and a connecting hook. One of the connecting ring and the connecting hook is provided near the hole on the flexible blade, and the other of the connecting ring and the connecting hook is provided on the blade sleeve, thereby connecting the flexible blade to the blade sleeve.

[0024] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blade can be effectively connected to the blade sleeve through the blade-sleeve connector with hook and ring connection, and the connection method is simple, flexible and easy to disassemble. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention.

[0026] Figure 2 This is an exploded view of a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention.

[0027] Figure 3 This is an assembly flowchart of a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention.

[0028] List of reference numerals

[0029] 1: Flexible blades; 21: Mixer base; 22: Shaft; 23: Blade sleeve; 24: Nut; 25: Bolt; 26: Connecting ring; 27: Shaft sleeve; 28: Connecting hook. Detailed Implementation

[0030] The following describes specific embodiments of the present invention. It should be noted that, in order to provide a concise description, this specification cannot exhaustively describe all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, just as in any engineering or design project, various specific decisions are often made to achieve the developer's specific goals and to meet system-related or business-related constraints, and this can change from one embodiment to another. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, some design, manufacturing, or production modifications based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0031] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in the patent application description and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0032] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0033] Figure 1 This is a three-dimensional schematic diagram of a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention. Figure 2 This is an exploded view of a movable, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention. Figures 1 to 2 As shown, a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention includes a stirrer base 21, at least two rotating shafts 22, a rotating shaft sleeve 27, flexible blades 1, and a blade sleeve 23. The stirrer base 21 has a built-in motor, and two rotating shafts 22 are connected together by a rotating shaft sleeve 27. One of the two rotating shafts 22 is connected to the stirrer base 21 and is driven by the motor to rotate. The flexible blade 1 is connected to the rotating shaft 22 by a blade sleeve 23. The flexible blade 1 is foldable and made of flexible material.

[0034] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: it can solve the problem of difficulty in controlling the electromagnetic field uniformity in the shielded area when testing complex objects, and it can also solve the problem that the metal blades of the stirrer may cause damage to the aircraft and test personnel when rotating at high speed.

[0035] Specifically, this invention solves the problem of difficulty in controlling the electromagnetic field uniformity in obstructed areas when testing complex objects. Through the folding design of the flexible blades, the electromagnetic field stirrer can be positioned at lower altitudes such as under the fuselage or wings, enabling flexible control of the field uniformity in these areas and achieving better stirring results. Furthermore, the foldability of the flexible blades improves the electromagnetic field stirrer's accessibility in confined areas such as reverberation chamber doors, facilitating its transport and movement. This invention also addresses the potential for injury to the aircraft and test personnel caused by the high-speed rotation of the stirrer's metal blades. Due to the lightweight and soft nature of the materials used in the flexible blades, even if the stirrer blades collide with the aircraft or test personnel during testing, injury to personnel or the aircraft can be avoided, ensuring test safety.

[0036] In some embodiments, such as Figures 1 to 2 As shown, the rotating shaft 22 is threadedly connected to the stirrer base 21, and its rotation is driven by a motor within the stirrer base 21. In some embodiments, such as Figures 1 to 2 As shown, the flexible blade 1 is folded and has a hole in its center for the shaft 22 to pass through. Therefore, the flexible blade 1 is foldable, and the height of the flexible blade and the entire electromagnetic stirrer can be freely adjusted, which has high passability and high applicability to test areas of different heights; the blade of the electromagnetic stirrer is made of flexible material, which has the material properties of being light and soft.

[0037] In some embodiments, such as Figures 1 to 2 As shown, the flexible blade 1 is made of conductive fiber cloth.

[0038] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through the flexible blades of a suitable material (conductive fiber cloth), a better electromagnetic field stirring effect can be achieved.

[0039] In some embodiments, such as Figures 1 to 2 As shown, the flexible blade 1 uses a fiber cloth (e.g., polyester fiber cloth) as a substrate and applies an electroplated metal coating to form a conductive fiber cloth. Preferably, the flexible blade 1 undergoes pretreatment, such as smoothing or cleaning, before applying the electroplated metal coating.

[0040] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through a suitable flexible blade forming method (fiber cloth + electroplating), conductive fiber cloth can be formed to constitute flexible blades.

[0041] In some embodiments, such as Figures 1 to 2 As shown, the flexible blade 1 has a support frame (e.g., a lightweight support frame) at its fold.

[0042] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blades can be easily folded or unfolded along the support frame, and large-area collapse of the flexible blades can be avoided after unfolding.

[0043] In some embodiments, such as Figures 1 to 2 As shown, there are multiple support frames, and the spacing between two adjacent support frames is equal.

[0044] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: it improves the foldability of the flexible blades and ensures that each fold of the flexible blades is basically the same after folding, thereby achieving a better electromagnetic field stirring effect.

[0045] In some embodiments, such as Figures 1 to 2 As shown, the mobile, foldable, flexible electromagnetic stirrer also includes a sleeve connector for connecting the shaft sleeve 27 and / or the blade sleeve 23 to the shaft 22.

[0046] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: through the sleeve connector, the rotating shaft sleeve can be connected to the rotating shaft (for example, two adjacent rotating shafts), and the blade sleeve can also be connected to the rotating shaft.

[0047] In some embodiments, such as Figures 1 to 2 As shown, the number of rotating shafts 22 can be increased or decreased according to actual usage needs, and at least one row of threaded holes is provided on the rotating shaft 22 along the axial direction.

[0048] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the number of rotating shafts can be increased or decreased according to the stirrer height required for actual use, for example, two rotating shafts, three rotating shafts, four rotating shafts, etc., and each pair of adjacent rotating shafts are connected by a rotating shaft sleeve.

[0049] In some embodiments, such as Figures 1 to 2 As shown, the sleeve connector includes bolts 25 and nuts 24, thereby connecting the shaft sleeve 27 and / or the blade sleeve 23 to the shaft 22.

[0050] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the bolt can be inserted into the rotating shaft through the threaded hole on one side of the rotating shaft, and then out through the threaded hole on the other side of the rotating shaft. The corresponding rotating shaft sleeve and / or blade sleeve are also provided with through holes for the bolt to be inserted and out. The bolt after being inserted is tightened by a nut, so that the rotating shaft sleeve and / or blade sleeve are connected to the rotating shaft.

[0051] In some embodiments, such as Figures 1 to 2 As shown, the mobile, foldable, flexible electromagnetic stirrer also includes a blade-sleeve connector for connecting the flexible blade 1 to the blade sleeve 23.

[0052] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blades can be effectively connected to the blade sleeve through the blade-sleeve connector.

[0053] In some embodiments, such as Figures 1 to 2 As shown, the flexible blade 1 has a hole in its center for the shaft 22 to pass through. The blade-sleeve connector includes a connecting ring 26 and a connecting hook 28. One of the connecting ring 26 and the connecting hook 28 is provided near the hole of the flexible blade 1, and the other of the connecting ring 26 and the connecting hook 28 is provided on the blade sleeve 23, thereby connecting the flexible blade 1 to the blade sleeve 23.

[0054] According to the above technical solution, the mobile foldable flexible electromagnetic field stirrer of the present invention can achieve the following beneficial technical effects: the flexible blade can be effectively connected to the blade sleeve through the blade-sleeve connector with hook and ring connection, and the connection method is simple, flexible and easy to disassemble.

[0055] Preferably, the rotating shaft 22 can be fitted with a blade sleeve 23 that corresponds to the number and height of the holes in the flexible blade. Through the blade sleeve 23 and the blade-sleeve connector, the rotating shaft 22 drives the flexible blade 1 to rotate.

[0056] It should be noted that the term "shaft sleeve" in this document refers to a sleeve used to connect two adjacent shafts. The term "blade sleeve" refers to another type of sleeve fitted onto a single shaft, used to connect flexible blades to the shaft. The term "sleeve connector" refers to a connector used to connect sleeves (shaft sleeves and / or blade sleeves) to shafts. The term "blade-sleeve connector" refers to a connector used to connect flexible blades to blade sleeves.

[0057] Figure 3 This is a flowchart illustrating the assembly process of a mobile, foldable, flexible electromagnetic field stirrer according to an embodiment of the present invention. A typical assembly process for the mobile, foldable, flexible electromagnetic field stirrer of the present invention can be as follows: (1) Select an appropriate number of rotating shafts 22 and rotating shaft sleeves 27 according to actual usage needs, and connect multiple rotating shafts 22 together through rotating shaft sleeves 27 to form a rotating shaft assembly; (2) Connect (e.g., threaded connection) the lowest shaft 22 in the shaft assembly to the stirrer base 21; (3) Determine the operating height of the flexible blade 1, determine the installation position and quantity of the blade sleeve 23, and place the blade sleeve 23 on the corresponding positions in the middle and upper parts of the rotating shaft 22 (the height of the blade sleeve can be freely adjusted), so that the threaded hole of the blade sleeve 23 is aligned with the threaded hole of the rotating shaft 22, and then fix it for example with a nut 24 and a bolt 25. (4) Place the flexible blade 1 on the rotating shaft, unfold the flexible blade 1 to a suitable height, and connect the flexible blade 1 to the blade sleeve 23.

[0058] The specific embodiments of the present invention have been described above. However, those skilled in the art will understand that the above specific embodiments do not constitute a limitation on the present invention. Those skilled in the art can make various modifications based on the above disclosure without exceeding the scope of the present invention.

Claims

1. A mobile, foldable, flexible electromagnetic field stirrer, characterized in that, The mobile, foldable, flexible electromagnetic stirrer includes a stirrer base, at least two rotating shafts, a rotating shaft sleeve, flexible blades, and a blade sleeve. The stirrer base has a built-in motor, the two rotating shafts are connected together by the rotating shaft sleeve, one of the two rotating shafts is connected to the stirrer base and is driven to rotate by the motor, the flexible blade is connected to the rotating shaft by the blade sleeve, and the flexible blade is foldable and made of flexible material.

2. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 1, characterized in that, The flexible blades are made of conductive fiber cloth.

3. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 2, characterized in that, The flexible blades are made of fiber cloth as the base material and are coated with an electroplated metal layer to form a conductive fiber cloth.

4. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 1, characterized in that, The flexible blade has a supporting frame at its fold joint.

5. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 4, characterized in that, There are multiple support frames, and the spacing between any two adjacent support frames is equal.

6. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 1, characterized in that, The mobile, foldable, flexible electromagnetic stirrer also includes a sleeve connector for connecting the shaft sleeve and / or the blade sleeve to the shaft.

7. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 6, characterized in that, The number of rotating shafts can be increased or decreased according to actual usage needs, and at least one row of threaded holes is provided on the rotating shaft along the axial direction.

8. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 7, characterized in that, The sleeve connector includes bolts and nuts, thereby connecting the shaft sleeve and / or the blade sleeve to the shaft.

9. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 1, characterized in that, The mobile, foldable, flexible electromagnetic stirrer also includes a blade-sleeve connector for connecting the flexible blades to the blade sleeve.

10. The mobile, foldable, flexible electromagnetic field stirrer as described in claim 9, characterized in that, The flexible blade has a hole at its center for the shaft to pass through. The blade-sleeve connector includes a connecting ring and a connecting hook. One of the connecting ring and the connecting hook is provided near the hole on the flexible blade, and the other of the connecting ring and the connecting hook is provided on the blade sleeve, thereby connecting the flexible blade to the blade sleeve.

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