Transponder transmission module antenna testing device

Abstract

The utility model relates to the technical field of antenna testing, and provides a transponder transmission module antenna testing device which comprises a supporting piece and at least two signal shielding components, and all the signal shielding components are spliced into a shielding structure used for surrounding an antenna to be tested in the circumferential direction. The at least one signal shielding member is slidably connected with the supporting member, and when the position of the signal shielding member is slid, the distance between the shielding structure and the antenna to be tested is changed. According to the utility model, the influence on the electrical parameters of the antenna can be tested under different relative position conditions by adjusting the relative positions of the shielding structure and the antenna, and the problem that the transponder transmission module lacks professional equipment for dynamically testing the antenna unit at the initial stage of engineering contact design and during design change is solved.

Description

Technical Field

[0001] This utility model relates to the field of antenna testing technology, and more specifically, to a transponder transmission module antenna testing device. Background Technology

[0002] The Balise Transmission Module (BTM), also known as the transponder information receiving unit, is a key component of the onboard equipment in high-speed train operation control systems. It performs the function of receiving information from point-based transponders and controlling the train. Specifically, the BTM includes an antenna unit, a crucial component of the module, which is mounted under the train. Due to the complex installation environment, the antenna unit is susceptible to interference from the metal casings of other equipment near its mounting location. This affects the radiation lobe pattern of the antenna unit, thus influencing the magnetic field coupling characteristics between the antenna and the ground transponder, as well as the spatial range of signals that can be received when the antenna passes the transponder. Consequently, this impacts the maximum train speed that the BTM can support.

[0003] To avoid the aforementioned problems in the early stages of engineering design, testing is necessary before the antenna installation scheme is finalized to confirm the acceptable impact of surrounding metallic objects on the antenna, thus determining the feasibility of the installation scheme. Furthermore, design changes to antenna elements may alter the antenna's resistance to the influence of surrounding metallic objects. Therefore, when antenna design changes occur, the impact of metallic objects on the antenna's lobe pattern also needs to be assessed. However, currently, there is no specialized equipment available for dynamic testing of antenna elements under laboratory conditions. Utility Model Content

[0004] The purpose of this invention is to provide a transponder transmission module antenna testing device to solve the problem of the lack of professional equipment for dynamic testing of the antenna unit of the transponder transmission module in the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A transponder transmission module antenna testing device includes a support member and a signal shielding member. The number of signal shielding members is at least two. All signal shielding members are spliced ​​together circumferentially to form a shielding structure for surrounding the antenna under test. At least one signal shielding member is slidably connected to the support member. When the position of the sliding signal shielding member is changed, the distance between the shielding structure and the antenna under test is changed.

[0007] Optionally, the shielding structure is a box with open upper and lower ends, and the support is a shielding panel. The shielding panel is located at one open end of the box and covers the open end of the box.

[0008] Optionally, the signal shielding component includes side plates and sliding plates. There are four side plates, and each side plate is connected to a sliding plate that is adjustable in position along the length direction at each end. Two side plates are slidably connected to the support member in a first direction with a gap between them, and the other two side plates are slidably connected to the support member in a second direction with a gap between them. The side plates are perpendicular to the support member, and the side plates connected in the first direction and the side plates connected in the second direction are close to or in contact with each other.

[0009] Optionally, the support member is provided with at least one guide rail along the first direction and the second direction respectively, and the bottom of the side plate is provided with at least one slider. The slider cooperates with the guide rail and is locked onto the guide rail by fasteners. When the fasteners are loosened, the side plate can move along the first direction or the second direction. The slide plate is provided with at least one strip hole along the length direction, and the two ends of the side plate are provided with mounting holes. The mounting holes correspond to the strip hole. The slide plate is connected to one end of the side plate by fasteners cooperating with the strip hole and the mounting hole. When the fasteners are loosened, the slide plate can move along the length direction of the side plate.

[0010] Optionally, the top of both the side panels and the skateboard has a circumferentially outward folded edge, which is perpendicular to the side panels and the skateboard.

[0011] Optionally, the shielding panel, side panels, and slide plate are all made of metal.

[0012] Optionally, the shielding structure is a ring-shaped body, and the support is an unshielded panel.

[0013] Optionally, the signal shielding component includes four metal sheets, two of which are slidably connected opposite each other and spaced apart in a first direction of the unshielded panel, and the other two are slidably connected opposite each other and spaced apart in a second direction of the unshielded panel, wherein the first direction is perpendicular to the second direction, the metal sheets are parallel to the unshielded panel, and the metal sheets in the first direction overlap or contact each other with the metal sheets in the second direction.

[0014] Optionally, the signal shielding component includes two right-angle metal plates. The metal plates are slidably connected to at least one of the first, second, and third directions of the unshielded panel. The two right-angle metal plates are arranged facing each other, parallel to the unshielded panel, with the first direction perpendicular to the second direction, and the third direction forming a 45° angle with the first and second directions respectively.

[0015] Optionally, at least one first groove is provided in each of the first, second, and third directions of the support member; at least one second groove is provided on each of the two right-angled sides of the right-angled metal sheet. When the metal sheet moves relative to the support member along the first, second, or third direction, the second groove is aligned with the first groove in at least one of the first, second, and third directions, and the right-angled metal sheet is locked or loosened to the support member by fasteners cooperating with the first and second grooves.

[0016] The beneficial effects of the transponder transmission module antenna testing device provided by this utility model are at least as follows: It simulates signal interference sources in the surrounding environment of the antenna under test by simulating the signal interference sources in actual applications through at least two signal shielding components spliced ​​circumferentially to form a shielding structure surrounding the antenna under test. Furthermore, at least one signal shielding component is slidably connected to a support member. The distance between the shielding structure and the antenna under test can be adjusted by sliding the position of the signal shielding component, enabling the measurement of the electrical parameters of the antenna under test under different relative positions of the signal shielding component and the antenna. This verifies whether the influence of interference sources on the antenna under test is acceptable, thus solving the problem of lacking specialized equipment for testing the influence of surrounding metal objects on the antenna during the initial design phase of engineering connections and when antenna unit design changes occur. In addition, since at least one signal shielding component forming the shielding structure is slidably connected to the support member, the distance between the shielding structure and the antenna under test can be adjusted by sliding the position of the signal shielding component during testing. This allows for the simulation of test results of the antenna under test and surrounding metal interference sources at different distances on the same testing device. This not only makes the test results more reliable and comprehensive but also reduces the manufacturing cost of the testing tools. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A front view of a support member provided in an embodiment of this utility model;

[0019] Figure 2 The shielding structure provided in this embodiment of the utility model is a front view of the box body;

[0020] Figure 3 A structural diagram of a signal shielding component provided for an embodiment of this utility model;

[0021] Figure 4A front view of a side panel provided in an embodiment of this utility model;

[0022] Figure 5 A perspective view of a side plate provided for an embodiment of this utility model;

[0023] Figure 6 A perspective view of a skateboard provided for an embodiment of this utility model;

[0024] Figure 7 A schematic diagram of a sliding connection structure between a side plate and a support member provided for an embodiment of this utility model;

[0025] Figure 8 A side view of a transponder transmission module antenna testing device provided in an embodiment of this utility model;

[0026] Figure 9 A diagram showing the state of the side plate moving to the position of minimum distance from the antenna under test in the transponder transmission module antenna testing device provided in this embodiment of the utility model.

[0027] Figure 10 A diagram showing the state of the side plate moving to the maximum distance from the antenna under test in the transponder transmission module antenna testing device provided in this embodiment of the utility model.

[0028] Figure 11 A front view of another support member provided in an embodiment of this utility model;

[0029] Figure 12 A structural diagram of another signal shielding component provided in an embodiment of this utility model;

[0030] Figure 13 A diagram showing the state of the right-angled metal piece moving to the position of minimum distance from the antenna under test in the transponder transmission module antenna testing device provided in this embodiment of the utility model.

[0031] Figure 14 A state diagram showing the movement of a right-angled metal plate along a second direction in the transponder transmission module antenna testing device provided in this embodiment of the utility model;

[0032] Figure 15 A diagram showing the state of the right-angled metal plate moving along a third direction in the transponder transmission module antenna testing device provided in this embodiment of the utility model;

[0033] Figure 16 This is a diagram showing the state of the right-angled metal piece moving to the position of maximum distance from the antenna under test in the transponder transmission module antenna testing device provided in this embodiment of the utility model.

[0034] In the figure, the following reference numerals are used: 1. Support component; 11. Guide rail; 12. First slide groove; 2. Signal shielding component; 21. Side plate; 211. Slider; 212. Mounting hole; 22. Slide plate; 221. Strip hole; 23. Folded edge; 24. Right-angle metal piece; 241. Second slide groove; 3. Fixing component; 4. Fastener; W1. First direction; W2. Second direction; W3. Third direction. Detailed Implementation

[0035] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0037] The transponder transmission module (BTM) is a key component of the high-speed train operation control system, responsible for receiving information from ground transponders to control train operation. Its antenna unit is mounted under the train and is susceptible to the influence of surrounding metal objects, leading to changes in the radiation lobe pattern, which in turn affects magnetic field coupling characteristics and signal reception range, ultimately limiting train speed. To avoid these problems, the impact of metal objects on the antenna must be evaluated through testing before the antenna installation scheme is designed, and re-evaluated after antenna design changes. However, currently, there is a lack of specialized equipment for dynamic testing under laboratory conditions.

[0038] In view of the above problems, please refer to some embodiments of this application. Figure 1 and Figure 2 A transponder transmission module antenna testing device is provided, including a support member 1 and at least two signal shielding members 2. The at least two signal shielding members 2 are spliced ​​together circumferentially to form a shielding structure for surrounding the antenna under test, and at least one signal shielding member 2 is slidably connected to the support member 1. When the position of any one of the at least one signal shielding member 2 is slid, the distance between the shielding structure and the antenna under test is changed.

[0039] The support member 1 provides support for the sliding connection of each signal shielding member 2, so that at least one signal shielding member 2 can slide on the support member 1 to flexibly adjust the distance between the shielding structure and the antenna under test.

[0040] The signal shielding component 2 serves as a signal interference source, simulating the interference experienced by the antenna under test in the application environment. In this embodiment, the signal shielding components 2 are assembled to form a shielding mechanism surrounding the antenna under test, and at least one signal shielding component 2 is slidably connected to the support component 1. By sliding any signal shielding component 2, the distance between the shielding structure and the antenna under test can be adjusted, thereby achieving flexible control of the antenna testing environment.

[0041] The working principle of the transponder transmission module antenna testing device provided by this utility model is as follows: the signal shielding component 2 is used to simulate different locations of possible signal interference sources around the antenna under test, and the relative position of the shielding structure and the antenna under test is changed by sliding the signal shielding component 2, so as to test the influence of the electrical parameters of the antenna under test under different relative position conditions.

[0042] Therefore, the transponder transmission module antenna testing device provided by this utility model simulates signal interference sources in the surrounding environment of the antenna under test by simulating the signal interference sources in actual applications through at least two signal shielding components 2 spliced ​​circumferentially to form a shielding structure for surrounding the antenna under test. At least one signal shielding component 2 is slidably connected to the support component 1. By sliding the position of the signal shielding component 2, the distance between the shielding structure and the antenna under test can be adjusted, enabling the measurement of the electrical parameters of the antenna under test under different relative positions of the signal shielding component 2 and the antenna. This verifies whether the influence of interference sources on the antenna under test is acceptable, thus solving the problem of lacking specialized equipment for testing the influence of surrounding metal objects on the antenna during the initial design phase of engineering connections and when antenna unit design changes occur. Furthermore, since at least one signal shielding component 2 forming the shielding structure is slidably connected to the support component 1, the distance between the shielding structure and the antenna under test can be adjusted by sliding the position of the signal shielding component 2 during testing. This allows for the simulation of test results of the antenna under test and surrounding metal interference sources at different distances on the same testing device. This not only makes the test results more reliable and comprehensive but also reduces the manufacturing cost of the testing tools.

[0043] In this embodiment, the shielding structure formed by splicing the signal shielding components 2 is not unique. For example, the shielding structure can be a box or a ring.

[0044] In some embodiments, see Figures 1 to 8 The shielding structure is a box with open upper and lower ends. The support member 1 is a shielding panel, which is located at one open end of the box and covers the open end of the box.

[0045] The shape of the box includes, but is not limited to, cuboids, cubes, cylinders, spheres, cones, prisms, pyramids, elliptical cylinders, irregular shapes, flat boxes, trapezoidal boxes, and polyhedra.

[0046] The surface area of ​​the shielding panel is larger than the area of ​​the box at its open end, so as to cover the open end of the box and also to shield the signal. In practice, the shielding panel and the signal shielding component 2 can be made of the same material or different materials. For example, both the shielding panel and the signal shielding component 2 can be metal plates.

[0047] In this embodiment, the housing is preferably a hexahedron, with the top and bottom faces open, and the remaining four sides of the housing formed by splicing together signal shielding components 2. Furthermore, the support member 1 is preferably a shielding panel, covering one open face of the housing, thus forming a housing with only one open face together with the shielding structure. During testing, the antenna under test is located inside the housing, with only the signal receiving surface of the antenna exposed at the open end of the housing. The remaining surfaces are surrounded by the shielding structure formed by the signal shielding components 2 and the shielding panel containing the support member 1. Since the signal shielding components 2 are slidably connected to the support member 1, the position of the signal shielding components 2 can be moved to adjust the distance between the antenna under test and the signal shielding components 2, thereby enabling testing of the impact on the electrical parameters of the antenna under different relative position conditions.

[0048] Furthermore, the construction and connection methods of the signal shielding member 2 to achieve the shielding structure differ depending on the shape of the shielding structure. Since at least one signal shielding member 2 is slidably connected to the support member 1, when the signal shielding member 2 slides relative to the support member 1, not only will the distance between the signal shielding member 2 and the antenna under test change, but the shape of the shielding structure must still remain a box.

[0049] In some embodiments, combined with Figures 3 to 8 For example, the signal shielding component 2 includes side plates 21 and sliding plates 22. There are four side plates 21. Each side plate 21 is connected to a sliding plate 22 at each end in the length direction, which is adjustable in position along the length direction. Two side plates 21 are slidably connected to the support member 1 in the first direction W1 with a gap between them. The other two side plates 21 are slidably connected to the support member 1 in the second direction W2 with a gap between them. The side plates 21 are perpendicular to the support member 1, and the side plates 21 connected in the first direction W1 and the side plates 21 connected in the second direction W2 are close to or in contact with each other.

[0050] Specifically, when the support member 1 is a shielding panel, the four side plates 21 are spliced ​​together to form the four sides of the box. Each side plate 21 is perpendicular to the shielding panel, and the two opposite sides of the four sides of the box are slidably connected to the support member 1 so as to adjust the distance between the shielding structure and the antenna under test by sliding the side plates 21 during the test.

[0051] Furthermore, there are four side plates 21, and each side plate 21 is connected to a sliding plate 22 at both ends, resulting in a total of eight sliding plates 22. The sliding plates 22 can move along the length of the side plate 21. When adjusting the distance between the shielding structure and the antenna under test by sliding the side plate 21 on the support member 1, the length of the side plate 21 can be adjusted by sliding the sliding plates 22 at both ends of the side plate 21 to maintain the box-like shape of the shielding structure. For example, when the sliding plates 22 on the side plate 21 in the first direction W1 or the second direction W2 of the support member 1 increase the distance to the antenna under test, the gap between two adjacent side plates 21 increases, and the position of the sliding plates 22 can be adjusted to lengthen the side plate 21. Conversely, when the sliding plates 22 on the side plate 21 in the first direction W1 or the second direction W2 of the support member 1 decrease the distance to the antenna under test, the position of the sliding plates 22 can be adjusted to shorten the side plate 21, causing adjacent side plates 21 to come into close contact or come near each other, thus avoiding or reducing gaps between adjacent side plates 21 and forming a good shielding structure in the circumferential direction.

[0052] The shielding panel, side plate 21, and slide plate 22 can be metal plates. Of course, in practice, when the shielding structure is in the shape of a box, in addition to using metal plates, the side plate 21, slide plate 22, and support member 1 can also be side plates 21, slide plates 22, and support member 1 with conductive coatings on their surfaces, or composite materials such as conductive plastics and metallized fabrics. This embodiment does not impose any restrictions on this.

[0053] Furthermore, the side plates 21 in the same direction (e.g., the first direction W1 or the second direction W2) have the same length, while the side plates 21 in different directions (e.g., the first direction W1 and the second direction W2) can have the same or different lengths. For example, as shown in the figure, the side plates 21 in the first direction W1 and the second direction W2 have different lengths, with two side plates 21 in one direction being shorter and two side plates 21 in the other direction being longer, with dimensions of 503mm and 645mm respectively. When the distance between the side plates 21 and the antenna under test is increased, if the four side plates 21 are not enough to form a box, the position of the sliding plate 22 is adjusted to change the length of the side plates 21, so that the four side plates 21 can form a shielding structure in the shape of a box.

[0054] When the shielding structure is box-shaped, the side plate 21 is slidably connected to the support member 1, and an adjustable sliding plate 22 is connected to each end of the side plate 21. This is the key to achieving adjustable position between the shielding structure and the antenna under test. In practice, the sliding connection between the side plate 21 and the support member 1, as well as the connection between the sliding plate 22 and the side plate 21, are not unique.

[0055] In some embodiments, combined with Figure 1 and Figure 7 For example, the support member 1 is provided with at least one guide rail 11 along the first direction W1 and the second direction W2 respectively, and the bottom of the side plate 21 is provided with at least one slider 211. The slider 211 cooperates with the guide rail 11 and is fastened to the guide rail 11 by fastener 4. When the fastener 4 and the slider 211 are loosened, the side plate 21 can move along the first direction W1 or the second direction W2.

[0056] The slide plate 22 has at least one strip hole 221 along its length. The two ends of the side plate 21 have mounting holes 212, which correspond to the strip hole 221. The slide plate 22 is connected to the side plate 21 by a fastener 3 at the positions corresponding to the strip hole 221 and the mounting hole 212. When the fastener 3 is released, the slide plate 22 can move along the length of the side plate 21.

[0057] The number of guide rails 11 on the support plate in either the first direction W1 or the second direction W2 can be one, in which case the two side plates 21 are slidably connected to the same guide rail 11. Alternatively, the number of guide rails 11 on the support plate in either the first direction W1 or the second direction W2 can be two or more. For example, in the figure, the number of guide rails 11 on both the first direction W1 and the second direction W2 of the support plate is four. The four guide rails 11 are divided into two groups of two, with each group consisting of two guide rails 11. The two groups of guide rails 11 are spaced apart along the same direction and are slidably connected to one side plate 21 respectively. A slider 211 on the side plate 21 is used to cooperate with the guide rail 11, allowing the side plate 21 to slide along the first direction W1 or the second direction W2 on the support plate to adjust its position.

[0058] In this embodiment, the guide rail 11 on the support plate is preferably a groove, the slider 211 on the side plate 21 is preferably a threaded post, and the fastener 4 is preferably a nut and a washer. The groove passes through the support plate, the threaded post is inserted into the groove on one side of the support plate and protrudes from the other side of the support plate, and the threaded post protruding from the other side of the support plate is connected to the groove by cooperating with the nut and washer. When it is necessary to adjust the position of the side plate 21, the nut on the threaded post is loosened, allowing the slider 211 to move along the guide rail 11, thereby moving the side plate 21 to the target position. Then, the nut on the threaded post is tightened to fix the slider 211 on the guide rail 11, thus completing the position adjustment of the side plate 21.

[0059] Furthermore, the fastener 3 used to fix the slide plate 22 and the side plate 21 includes bolts and nuts. The bolts pass through the slotted hole 221 and the mounting hole 212 and are fastened to the nuts, thus fixing the slide plate 22 to the side plate 21. When it is necessary to adjust the position of the slide plate 22, the nuts and bolts are loosened, allowing the slide plate 22 to move along the direction of the slotted hole 221 to lengthen or shorten the length of the side plate 21. After the slide plate 22 moves to the target position, the nuts and bolts are tightened to fix the slide plate 22 to the side plate 21, achieving the effect of adjusting the position of the slide plate 22. In practical applications, to ensure a stable and secure connection between the slide plate 22 and the side plate 21, it is preferable that the slide plate 22 has two slotted holes 221. These two slotted holes 221 are parallel to each other and spaced apart along the length of the side plate 21. The fixing component 3 also includes a corner plate, which has through holes corresponding to the positions of the slotted holes 221 and the mounting holes 212. When fixing the slide plate 22 and the side plate 21, the through holes on the corner plate, the slotted holes on the slide plate 22, and the mounting holes 212 on the side plate 21 are aligned. The bolt is then passed through the through holes, slotted holes 221, and mounting holes 212 and connected to the nut. When the nut is loosened, the slide plate 22 can move along the direction of the slotted holes 221 to adjust its position on the side plate 21 and change the length of the side plate 21. When the nut is tightened, the slide plate 22 is fixedly connected to the side plate 21.

[0060] This embodiment achieves adjustable distance between the signal shielding component 2 and the antenna under test by using a sliding fit connection between the side plate 21 and the support member 1, and an adjustable position connection between the slide plate 22 and the side plate 21. Furthermore, after the position of the signal shielding component 2 changes, the shape of the shielding structure formed by the signal shielding component 2 can be kept unchanged by adjusting the position of the slide plate 22 on the side plate 21, thereby enabling the testing of the impact on the electrical parameters of the antenna under different relative position conditions.

[0061] In some embodiments, combined with Figure 5 As shown in the figure, the top of both the side panel 21 and the slide plate 22 is provided with a folded edge 23 facing outward in the circumferential direction, and the folded edge 23 is perpendicular to the side panel 21 and the slide plate 22.

[0062] Specifically, in combination Figures 8 to 10In this embodiment, the folded edge 23 forms a shielding plane on the side opposite to the support member 1. During testing, the shielding plane formed by the folded edge 23 is located at the open end of the housing and is flush with the lower surface of the antenna under test. In this embodiment, the folded edge 23 can be formed by folding the side plate 21 and the sliding plate 22 outward from the top side, or a flat plate can be welded to the top of the side plate 21 and the sliding plate 22, which is perpendicular to the side plate 21 or the sliding plate 22. The material of the folded edge 23 is the same as that of the side plate 21 or the sliding plate 22, and it is also used to shield the antenna signal. In practice, there is no limitation on the outward extension dimension of the folded edge 23, that is, the range parameter of the shielding plane formed by the folded edge 23 at the open end of the housing can be customized by the antenna manufacturer, and this embodiment does not impose any limitation on this. For example, when the signal shielding component 2 slides to the maximum distance from the antenna under test, the shielding plane formed by the folded edge 23 has a range of 1594mm*1680mm; when the signal shielding component 2 slides to the minimum distance from the antenna under test, the shielding plane formed by the folded edge 23 has a range of 1103mm*1245mm.

[0063] In this embodiment, when the shielding structure is in the shape of a box, an outward folded edge 23 is used to further form a shielding plane at the open end of the box, which is flush with the lower surface of the antenna under test, so as to test the effect on the electrical parameters of the antenna.

[0064] In some embodiments, see Figures 11 to 16 The shielding structure is ring-shaped, and the support 1 is an unshielded panel.

[0065] The ring-shaped body has a shielding ring plane. When the shielding structure of the ring-shaped body is installed around the antenna under test for testing, there is no signal shielding except for the shielding ring plane formed at the position flush with the lower surface of the antenna under test.

[0066] In practice, the ring can be a circular ring or a multifaceted ring. In this embodiment, the ring is preferably a rectangular ring, but the specific implementation of the shielding structure in which the signal shielding components 2 are spliced ​​into a rectangular ring is not unique.

[0067] In some embodiments, the signal shielding member 2 includes four metal sheets, two of which are slidably connected opposite each other and spaced apart on a first direction W1 of the unshielded panel, and the other two metal sheets are slidably connected opposite each other and spaced apart on a second direction W2 of the unshielded panel. The first direction W1 is perpendicular to the second direction W2, the metal sheets are parallel to the unshielded panel, and the metal sheets on the first direction W1 and the metal sheets on the second direction W2 overlap or contact each other.

[0068] The metal sheets are elongated strips, each serving as a side length of the rectangular ring. Each metal sheet is independently and slidably connected to the unshielded panel where the support 1 is located. During testing, the distance between the antenna under test and the shielding structure is adjusted by moving the position of the metal sheets. It should be noted that, in practice, the method of achieving the sliding connection is not unique. The sliding connection method between the metal sheet and the support 1 can be referenced from the connection method between the side plate 21 and the support 1 described above, and will not be repeated here.

[0069] In some embodiments, combined with Figures 11 to 16 For example, the signal shielding component 2 includes two right-angle metal pieces 24. The metal pieces are slidably connected to at least one of the first direction W1, the second direction W2 and the third direction W3 of the unshielded panel. The two right-angle metal pieces 24 are arranged facing each other, and the right-angle metal pieces 24 are parallel to the unshielded panel. The first direction W1 is perpendicular to the second direction W2, and the third direction W3 is at 45° to the first direction W1 and the second direction W2.

[0070] The right-angled metal piece 24, also known as the L-shaped metal piece, serves as the two adjacent sides of the rectangular ring. Two right-angled metal pieces 24 are joined together to form a rectangular ring, resulting in a metal ring plane. Compared to using four strip metal pieces, the structure of two right-angled metal pieces 24 is simpler, reduces overlap, and allows adjustment of the distance between the antenna under test and the shielding structure—only one or two pieces need to be adjusted, eliminating the need to adjust all four pieces.

[0071] In practice, the dimensions of the right-angled metal piece 24 can be customized according to the parameters of the antenna manufacturer, and the lengths of the two right-angled sides of the right-angled metal piece 24 can be the same or different. For example, in this embodiment, the two right-angled sides of the right-angled metal piece 24 have different lengths, with one side being 1000mm and the other side being 1100mm. Furthermore, the widths of the two right-angled sides of the right-angled metal piece 24 can be the same or different; this embodiment does not impose any restrictions on this.

[0072] The right-angled metal sheet 24 is slidably connected to the unshielded panel where the support 1 is located, and the specific implementation of the sliding connection is not unique.

[0073] Preferably, at least one first groove 12 is provided on each of the first direction, the second direction W2, and the third direction W3 of the support member 1; at least one second groove 241 is provided on each of the two right-angled sides of the right-angled metal piece 24. When the right-angled metal piece 24 moves relative to the support member 1 along the first direction, the second direction W2, or the third direction W3, the second groove 241 is aligned with the first groove 12 in at least one of the first direction, the second direction W2, and the third direction W3, and the right-angled metal piece 24 is fastened to the support member 1 by the fastener 4 cooperating with the first groove 12 and the second groove 241.

[0074] The first groove 12 and the second groove 241 are preferably strip-shaped holes 221, and the fasteners 4 are preferably bolts and nuts. When the second groove 241 on the right-angled metal piece 24 is aligned and communicates with the first groove 12 on the support member 1, the bolt is passed through the first groove 12 and the second groove 241, and then connected with the nut to fix the right-angled metal piece 24 and the support member 1. In this embodiment, the first direction W1 and the second direction W2 on the support member 1 are perpendicular to the two adjacent sides of the rectangular ring, and the third direction W3 is parallel to or coincides with the diagonal direction of the rectangular ring. Therefore, the right-angled metal piece 24 can be moved in the first direction W1, the second direction W2, or the third direction W3. For example, when it is necessary to adjust the distance between the shielding structure and the antenna under test, the nut is loosened so that the right-angled metal piece 24 can move along the first direction W1, the second direction W2, or the third direction W3 on the support member 1. After moving to the target position, the bolt and nut are tightened to achieve the effect of flexibly adjusting the distance between the shielding structure and the antenna under test.

[0075] The aforementioned box-shaped and ring-shaped shielding structures can both be used for dynamic parameter testing of antennas. In practice, combined with... Figures 1 to 16 The method for testing the antenna using the transponder transmission module antenna testing device provided in this embodiment is as follows:

[0076] During testing, the transponder transmission module antenna testing device is suspended within a 6-axis moving truss system. The antenna under test is placed within a shielded structure, with a certain distance maintained between the signal shielding component 2 and the antenna. The activation energy transmitted by the antenna and the threshold for receiving transponder signals are measured at different geometric test points in space, simulating and generating dynamic test curves to evaluate the maximum train speed supported by the transponder transmission module. During the test, the position of the signal shielding component 2 on the support 1 can be adjusted to regulate the distance to the antenna, thereby evaluating the impact of metal objects at different distances on the antenna. Furthermore, a transponder is placed below the antenna, and the range within which the antenna and transponder can normally receive signals is directly measured to complete the dynamic test. Changing the distance between the metal testing device and the antenna allows for the evaluation of the impact of metal objects at different distances on the antenna.

[0077] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A transponder transmission module antenna testing device, characterized in that, The device includes a support member and a signal shielding member. The number of signal shielding members is at least two. All the signal shielding members are spliced ​​together circumferentially to form a shielding structure for surrounding the antenna under test. At least one signal shielding member is slidably connected to the support member. When the position of the signal shielding member is slid, the distance between the shielding structure and the antenna under test is changed.

2. The transponder transmission module antenna testing device according to claim 1, characterized in that, The shielding structure is a box with open upper and lower ends, and the support is a shielding panel. The shielding panel is located at one open end of the box and covers the open end of the box.

3. The transponder transmission module antenna testing device according to claim 2, characterized in that, The signal shielding component includes side plates and sliding plates. There are four side plates, and each side plate is connected to a sliding plate that is adjustable along the length direction at each end. Two side plates are slidably connected to the support member in a first direction, facing each other and spaced apart. The other two side plates are slidably connected to the support member in a second direction, facing each other and spaced apart. The side plates are perpendicular to the support member, and the side plates connected in the first direction and the side plates connected in the second direction are close to or in contact with each other.

4. The transponder transmission module antenna testing device according to claim 3, characterized in that, The support member is provided with at least one guide rail along the first direction and the second direction respectively. The bottom of the side plate is provided with at least one slider. The slider cooperates with the guide rail and is locked to the guide rail by fasteners. When the fasteners are loosened, the side plate can move along the first direction or the second direction. The slide plate has at least one strip-shaped hole along its length, and the two ends of the side plate have mounting holes corresponding to the strip-shaped hole. The slide plate is connected to one end of the side plate by fasteners that cooperate with the strip-shaped hole and the mounting holes. When the fasteners are loosened, the slide plate can move along the length of the side plate.

5. The transponder transmission module antenna testing device according to claim 3, characterized in that, The top of both the side panel and the slide plate has a folded edge facing outwards in the circumferential direction, and the folded edge is perpendicular to the side panel and the slide plate.

6. The transponder transmission module antenna testing apparatus according to any one of claims 3 to 5, characterized in that, The shielding panel, side panels, and sliding plate are all made of metal.

7. The transponder transmission module antenna testing device according to claim 1, characterized in that, The shielding structure is a ring-shaped body, and the support member is an unshielded panel.

8. The transponder transmission module antenna testing device according to claim 6, characterized in that, The signal shielding component includes four metal sheets, two of which are slidably connected opposite each other and spaced apart in a first direction of the unshielded panel, and the other two are slidably connected opposite each other and spaced apart in a second direction of the unshielded panel. The first direction is perpendicular to the second direction, the metal sheets are parallel to the unshielded panel, and the metal sheets in the first direction overlap or contact each other with the metal sheets in the second direction.

9. The transponder transmission module antenna testing device according to claim 6, characterized in that, The signal shielding component includes two right-angled metal plates. The metal plates are slidably connected to at least one of the first, second, and third directions of the unshielded panel. The two right-angled metal plates are arranged facing each other and are parallel to the unshielded panel. The first direction is perpendicular to the second direction, and the third direction is at 45° to the first and second directions.

10. The transponder transmission module antenna testing device according to claim 9, characterized in that, At least one first groove is provided in each of the first direction, the second direction and the third direction of the support member; The right-angled metal sheet has at least one second sliding groove on each of its two right-angled sides. When the metal sheet moves relative to the support member along a first direction, a second direction, or a third direction, the second sliding groove is aligned with the first sliding groove in at least one of the first direction, the second direction, and the third direction. The right-angled metal sheet is locked or loosened to the support member by fasteners cooperating with the first and second sliding grooves.

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