Antenna device for electromagnetic compatibility test
By designing a rotatable and lockable loop antenna device, the inconvenience of the existing three-ring antenna device in transportation and testing is solved, and rapid and accurate deployment and contraction is achieved, and the test efficiency and transportation convenience are improved.
Patent Information
- Application Number
- CN202421057126.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing three-ring antenna devices are inconvenient to unfold and contract during transportation and testing, and lack an effective locking mechanism, which leads to a lot of testing time and is inconvenient to transportation.
An antenna device including three toroidal coils, a connecting mechanism and a locking mechanism is designed to quickly expand, lock and shrink the loop antenna through the locking mechanism and the connecting mechanism, and to achieve the use of pins and locking holes, limiting grooves and brackets. Accurate angle locking and rotating, brackets and circuit systems are used to support and manipulate antennas.
The rapid and accurate deployment and contraction of the antenna device is achieved, the test process is simplified, the transportation convenience is improved, and the operation convenience and stability are improved through elastic locking and anti-slip surfaces.
Smart Images
Figure CN222355414U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inspection and detection, in particular to an antenna device for electromagnetic compatibility testing. Background Art
[0002] As the electromagnetic environment becomes increasingly complex, people's health and quality of life are greatly affected by the electromagnetic compatibility performance of various electronic products. Under the global trend of "low radiation, high environmental protection", how to reduce the electromagnetic interference of various electronic products has become a focus of many people, and thus electromagnetic compatibility testing has come into being. Electromagnetic compatibility testing refers to the test of evaluating the electromagnetic compatibility of systems and equipment under laboratory or field environmental conditions using electromagnetic interference detection equipment and electromagnetic interference generation equipment.
[0003] In the lighting product (such as lamps) standard, for lighting products and other equipment that may generate low-frequency magnetic fields, it is necessary to use the loop antenna system (LAS) specified in the CI SPR 16-1-4 standard to measure their low-frequency magnetic field radiation disturbance, with a test frequency range of 9kHz to 30MHz. The antenna system commonly used at present is the three-loop antenna radiation test system.
[0004] The three-ring antenna in the prior art is usually composed of three fixed ring antennas, but this type of antenna is not convenient to transport according to the test needs. Another type is composed of three mutually rotatable ring antennas, but this type of antenna requires the operator to measure the angle of deployment before fixing it when unfolding, and lacks locking when retracting, so it is easy to cause problems such as taking up a lot of test time or inconvenient transportation. Utility Model Content
[0005] In order to solve the problems in the above background technology, the utility model provides an antenna device for electromagnetic compatibility test.
[0006] The solution adopted by the utility model to solve its technical problem is: an antenna device for electromagnetic compatibility test, including: a first annular coil, a second annular coil, a third annular coil, at most three connecting mechanisms and at least three locking mechanisms, the first annular coil, the second annular coil and the third annular coil can be rotatably connected to each other through the connecting mechanism and the locking mechanism, and the locking mechanism is locked after the first annular coil, the second annular coil or the third annular coil rotates a preset angle. In this case, the three annular antennas (the first annular coil, the second annular coil and the third annular coil) can be rotated through the locking mechanism or the connecting mechanism to be unfolded or retracted, and through the locking mechanism, the antenna device can be quickly and accurately unfolded and locked for testing, or retracted and locked to transfer the antenna device according to different test needs.
[0007] According to the antenna device involved in the utility model, optionally, the locking mechanism includes a first rotating part, a second rotating part, and a connecting part that can rotatably connect the first rotating part and the second rotating part, the first rotating part or the second rotating part has a plurality of pins, the first rotating part or the second rotating part has a plurality of locking holes, and after the connecting part rotates to the preset angle, the plurality of pins are located in the plurality of locking holes one by one. In this case, the three unfolded or retracted ring antennas can be locked by the cooperation of the pins and the locking holes, and the locking angle is preset, which can improve the locking speed and accuracy.
[0008] According to the antenna device involved in the utility model, optionally, the first rotating part or the second rotating part has a limiting groove matching the connecting part, and the limiting groove is configured to allow the connecting part to rotate only by the preset angle, and the preset angle is 90°. In this case, through the cooperation between the limiting groove and the connecting part, when the connecting part rotates and can only rotate 90°, the three loop antennas can be accurately unfolded into a mutually orthogonal or folded and contracted state.
[0009] According to the antenna device involved in the utility model, optionally, the connecting part includes a plurality of brackets, the plurality of brackets are in a retractable state when rotated, and the plurality of brackets are configured to rotate only the preset angle, and the preset angle is 90°. In this case, the rotation of the connecting part is achieved by the brackets, and when the connecting part rotates and can only rotate 90°, the three loop antennas can be accurately unfolded into a mutually orthogonal or folded and contracted state.
[0010] According to the antenna device of the utility model, optionally, the connection mechanism includes a first rotating part, a second rotating part, and a rotating shaft rotatably connecting the first rotating part and the second rotating part. In this case, the three loop antennas can be connected together and can rotate relative to each other.
[0011] According to the antenna device involved in the utility model, optionally, the locking mechanism and the connecting mechanism are arranged opposite to the first annular coil, the second annular coil or the third annular coil. In this case, the first annular coil and the second annular coil can be rotationally connected or locked, or the second annular coil and the third annular coil can be rotationally connected or locked, thereby facilitating the formation of an antenna device with three annular antennas orthogonal to each other.
[0012] According to the antenna device of the present invention, optionally, the first loop coil, the second loop coil or the third loop coil comprises at most two locking mechanisms and at most two connecting mechanisms. In this case, an antenna device with three mutually orthogonal loop antennas can be formed.
[0013] According to the antenna device involved in the utility model, optionally, one end of the pin entering the locking hole has a spherical protrusion, and the exit of the locking hole has an annular protrusion with the spherical protrusion, and the spherical protrusion or the annular protrusion has elasticity. In this case, the spherical protrusion and the annular protrusion can improve the stability of the locking, and at the same time, the elasticity can be used to facilitate the pin to be pulled out to release the locked state.
[0014] According to the antenna device involved in the utility model, optionally, the surface of the first rotating part or the second rotating part is provided with anti-slip corrugations. In this case, it is convenient for an operator to pull the first rotating part or the second rotating part, thereby facilitating the extraction of the pin from the locking hole.
[0015] According to the antenna device involved in the utility model, optionally, the antenna device further includes a supporting mechanism and a circuit system, the supporting mechanism is configured to connect the first annular coil, the second annular coil or the third annular coil through at least two supporting columns to support the antenna device, and the circuit system is used to control the antenna device to transmit or receive electromagnetic radiation to perform the electromagnetic compatibility test. In this case, a complete antenna device can be formed for performing the electromagnetic compatibility test.
[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of an antenna device for electromagnetic compatibility testing involved in the example of the present utility model;
[0018] Figure 2 This is a schematic diagram of the structure of a locking mechanism in an antenna device according to an example of the present utility model;
[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the rotation principle of the locking mechanism in the antenna device involved in the example;
[0020] Figure 4 This is a schematic diagram of the distribution of pins and locking holes in the antenna device involved in the example of the present utility model;
[0021] Figure 5 It is a structural schematic diagram of a locking mechanism in an antenna device involved in another example of the utility model;
[0022] Figure 6It is a structural schematic diagram of a connecting mechanism in an antenna device involved in an example of the present utility model.
[0023] In the figure: 1…antenna device; 11…first annular coil; 12…second annular coil; 13…third annular coil; 14…locking mechanism; 15…connecting mechanism; 16…supporting mechanism; 17…circuit system; 141…first rotating part; 142…second rotating part; 143…connecting part; 411…pin; 421…locking hole; 151…first rotating part; 152…second rotating part; 153…rotating shaft; 413…first through hole; 422…second through hole; 511…third through hole; 521…fourth through hole. DETAILED DESCRIPTION
[0024] In order to make the content of the utility model more clearly understood, the utility model is further described below based on specific embodiments in combination with the accompanying drawings.
[0025] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.
[0026] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.
[0027] The utility model describes an antenna device for electromagnetic compatibility testing. Figure 1 As shown, the antenna device 1 includes: a first loop coil 11 , a second loop coil 12 , a third loop coil 13 , at most three connection mechanisms 15 and at least three locking mechanisms 14 .
[0028] In some examples, the sizes of the first loop coil 11, the second loop coil 12 and the third loop coil 13 may be the same. In this case, the antenna device 1 formed by the first loop coil 11, the second loop coil 12 and the third loop coil 13 emits or receives radiation with higher accuracy during testing.
[0029] In other examples, the size of the first loop coil 11 may be larger than the second loop coil 12, and the size of the second loop coil 12 may be larger than the third loop coil 13. In this case, the antenna device 1 formed by the first loop coil 11, the second loop coil 12 and the third loop coil 13 can be completely folded to reduce space occupation and facilitate transportation.
[0030] In some examples, such as Figure 1 As shown, the first annular coil 11, the second annular coil 12 and the third annular coil 13 are rotatably connected to each other through a connecting mechanism 15 and a locking mechanism 14, and the locking mechanism 14 is locked after the first annular coil 11, the second annular coil 12 or the third annular coil 13 rotates a preset angle. In this case, the three annular antennas (the first annular coil 11, the second annular coil 12 and the third annular coil 13) can be rotated by the locking mechanism 14 or the connecting mechanism 15 to be unfolded or retracted, and through the locking mechanism 14, the antenna device 1 can be quickly and accurately unfolded and locked for testing, or retracted and locked for transfer according to different test needs.
[0031] In some examples, such as Figure 1 As shown, the locking mechanism 14 and the connecting mechanism 15 are arranged opposite to the first loop coil 11, the second loop coil 12 or the third loop coil 13. In this case, the first loop coil 11 and the second loop coil 12 can be rotationally connected or locked, or the second loop coil 12 and the third loop coil 13 can be rotationally connected or locked, thereby facilitating the formation of the antenna device 1 in which the three loop antennas are orthogonal to each other.
[0032] In some examples, such as Figure 1 As shown, the first loop coil 11, the second loop coil 12 or the third loop coil 13 includes at most two locking mechanisms 14 and at most two connecting mechanisms 15. In this case, an antenna device 1 can be formed in which three loop antennas are orthogonal to each other.
[0033] like Figure 2 As shown, in some examples, the locking mechanism 14 includes a first rotating portion 141 , a second rotating portion 142 , and a connecting portion 143 that can rotatably connect the first rotating portion 141 and the second rotating portion 142 .
[0034] In some examples, the first rotating part 141 or the second rotating part 142 has a plurality of pins 411, and the first rotating part 141 or the second rotating part 142 has a plurality of locking holes 421. In other words, the first rotating part 141 may have a plurality of pins 411 and the second rotating part 142 may have a plurality of corresponding locking holes 421, or the first rotating part 141 may have a plurality of locking holes 421 and the second rotating part 152 may have a plurality of corresponding pins 411, or the first rotating part 141 may have a plurality of pins 411 and a plurality of locking holes 421 at the same time and the second rotating part 142 may have a plurality of corresponding locking holes 421 and a plurality of corresponding pins 411.
[0035] In some examples, such as Figure 4 As shown, the pins 411 and the locking holes 421 may be distributed at 90° intervals.
[0036] In some examples, after the connection portion 143 rotates by a preset angle, the plurality of pins 411 are located one by one in the plurality of locking holes 421. In this case, the three unfolded or retracted loop antennas can be locked by the cooperation of the pins 411 and the locking holes 421, and the locking angle is preset, which can improve the locking speed and accuracy.
[0037] In some examples, such as Figure 2 and 3 As shown, the first rotating part 141 or the second rotating part 142 has a limiting groove matching the connecting part 143, and the limiting groove is configured to allow the connecting part 143 to rotate only by a preset angle, which is 90°. In this case, through the cooperation between the limiting groove and the connecting part 143, when the connecting part 143 rotates and can only rotate 90°, the three loop antennas can be accurately unfolded to a mutually orthogonal or folded and contracted state.
[0038] In other examples, such as Figure 5 As shown, the connection part 143 includes a plurality of brackets, and the plurality of brackets are in a retractable state when rotated, and the plurality of brackets are configured to rotate only a preset angle, and the preset angle is 90°. In this case, the rotation of the connection part 143 is achieved by the brackets, and when the connection part 143 rotates and can only rotate 90°, the three loop antennas can be accurately unfolded into a mutually orthogonal or folded and contracted state.
[0039] In some examples, such as Figure 2 or Figure 5 As shown, the first rotating portion 141 may have a first through hole 413 for fixing the first annular coil 11, the second annular coil 12, or the third annular coil 13. In some examples, the second rotating portion 142 may have a second through hole 422 for fixing the first annular coil 11, the second annular coil 12, or the third annular coil 13.
[0040] In some examples, the end of the pin 411 entering the locking hole 421 has a spherical protrusion, and the exit of the locking hole 421 has an annular protrusion with the spherical protrusion, and the spherical protrusion or the annular protrusion has elasticity. In this case, the spherical protrusion and the annular protrusion can improve the stability of the locking, and at the same time, the elasticity can be used to facilitate the pin 411 to release the locked state.
[0041] In some examples, the surface of the first rotating part 141 or the second rotating part 142 is provided with anti-slip corrugations. In this case, it is convenient for the operator to pull the first rotating part 141 or the second rotating part 142, thereby facilitating the extraction of the pin 411 from the locking hole 421.
[0042] In some examples, such as Figure 6 As shown, the connection mechanism 15 includes a first rotating portion 151, a second rotating portion 152, and a rotating shaft 153 rotatably connecting the first rotating portion 151 and the second rotating portion 152. In this case, three loop antennas can be connected together and can rotate relative to each other.
[0043] In some examples, such as Figure 6 As shown, the first rotating portion 151 may have a third through hole 511 for fixing the first annular coil 11, the second annular coil 12, or the third annular coil 13. In some examples, the second rotating portion 152 may have a fourth through hole 521 for fixing the first annular coil 11, the second annular coil 12, or the third annular coil 13.
[0044] In some examples, such as Figure 1 As shown, the antenna device 1 may further include a support mechanism 16 and a circuit system 17, wherein the support mechanism 16 is configured to connect the first annular coil 11, the second annular coil 12 or the third annular coil 13 through at least two support columns to support the antenna device 1, and the circuit system 17 is used to control the antenna device 1 to transmit or receive electromagnetic radiation to perform an electromagnetic compatibility test. In this case, a complete antenna device 1 can be formed for performing an electromagnetic compatibility test.
[0045] The embodiments described above are only preferred implementation modes of the present utility model and cannot be used to limit the protection scope of the present utility model. Any non-substantial changes and modifications made by technicians in this field on the basis of the utility model shall fall within the protection scope of the present utility model.
Claims
1. An antenna device for electromagnetic compatibility testing, characterized in that: include: A first annular coil, a second annular coil, a third annular coil, at most three connecting mechanisms and at least three locking mechanisms. The first annular coil, the second annular coil and the third annular coil are rotatably connected to each other through the connecting mechanisms and the locking mechanisms. The locking mechanisms are locked after the first annular coil, the second annular coil or the third annular coil rotates a preset angle.
2. The antenna device for electromagnetic compatibility testing according to claim 1, characterized in that: The locking mechanism includes a first rotating part, a second rotating part, and a connecting part that can rotatably connect the first rotating part and the second rotating part. The first rotating part or the second rotating part has a plurality of pins, and the first rotating part or the second rotating part has a plurality of locking holes. After the connecting part rotates by the preset angle, the plurality of pins are located in the plurality of locking holes one by one.
3. The antenna device for electromagnetic compatibility testing according to claim 2, characterized in that: The first rotating part or the second rotating part has a limiting groove matching the connecting part, and the limiting groove is configured to allow the connecting part to rotate only by the preset angle, and the preset angle is 90°.
4. The antenna device for electromagnetic compatibility testing according to claim 2, characterized in that: The connecting portion includes a plurality of brackets, and the plurality of brackets are in a retractable state when rotated. The plurality of brackets are configured to rotate only by a preset angle, and the preset angle is 90°.
5. The antenna device for electromagnetic compatibility testing according to claim 3 or 4, characterized in that: The connection mechanism includes a first rotating part, a second rotating part, and a rotating shaft rotatably connecting the first rotating part and the second rotating part.
6. The antenna device for electromagnetic compatibility testing according to claim 1, characterized in that: The locking mechanism and the connecting mechanism are arranged opposite to the first annular coil, the second annular coil or the third annular coil.
7. The antenna device for electromagnetic compatibility testing according to claim 6, characterized in that: The first annular coil, the second annular coil or the third annular coil includes at most two of the locking mechanisms and at most two of the connecting mechanisms.
8. The antenna device for electromagnetic compatibility testing according to claim 2, characterized in that: One end of the pin entering the locking hole has a spherical protrusion, and the outlet of the locking hole has an annular protrusion connected to the spherical protrusion, and the spherical protrusion or the annular protrusion is elastic.
9. The antenna device for electromagnetic compatibility testing according to claim 8, characterized in that: The surface of the first rotating part or the second rotating part is provided with anti-slip corrugations.
10. The antenna device for electromagnetic compatibility testing according to claim 1, characterized in that: The antenna device also includes a supporting mechanism and a circuit system. The supporting mechanism is configured to connect the first annular coil, the second annular coil or the third annular coil through at least two supporting columns to support the antenna device. The circuit system is used to control the antenna device to transmit or receive electromagnetic radiation to perform the electromagnetic compatibility test.