Vehicle-mounted receiving antenna

Abstract

The utility model discloses a vehicle-mounted receiving antenna, and relates to the technical field of train control. The antenna comprises a plurality of mounting parts, each mounting part comprises a first assembling end and a second assembling end, and the length of each first assembling end is larger than that of each second assembling end; the mounting plate is connected with the first assembling ends of the plurality of mounting pieces; and the antenna body is connected with the second assembling ends of the plurality of mounting pieces. The mounting piece of the vehicle-mounted receiving antenna provided by the utility model meets the mounting space limitation of the subway vehicle-mounted antenna, the structural design of the mounting piece effectively avoids other structures on a vehicle body, meanwhile, the antenna body is far away from signal magnetic field interference generated by wheels as far as possible, the signal receiving quality and stability of the antenna are improved, and the mounting piece is suitable for popularization and application. Therefore, the use time is prolonged, and the cost performance of the application is improved.

Description

Technical Field

[0001] This application relates to the field of train control technology, and in particular to an on-board receiving antenna. Background Technology

[0002] In subway train control systems, the onboard signal receiving antenna plays a crucial role, responsible for receiving instructions and signals from the ground control center to ensure the safe and accurate operation of the train. Currently, the onboard signal receiving antennas for subway train control systems on the market mainly use products from foreign companies. Although these products are technologically mature, their high procurement costs and reliance on imports pose significant challenges to the localization process and cost control of subway trains.

[0003] In response to the national call to promote the localization of rail transit equipment and reduce the manufacturing cost of subway trains, a requirement was put forward for the independent research and development of onboard antennas. The designed onboard receiving antenna must meet the overall requirements of the ATP (Automatic Train Protection) system, while also achieving localization of the onboard receiving antenna and reducing its manufacturing cost. Therefore, it is necessary to redesign a domestically produced onboard receiving antenna that meets the overall requirements of the ATP system and has a good cost-performance ratio. Utility Model Content

[0004] In view of this, this application provides a vehicle-mounted receiving antenna, the main purpose of which is to solve the problem that the existing vehicle-mounted receiving antennas for subway train control system signals mainly use products from foreign companies, resulting in high procurement costs and reliance on imported technology.

[0005] This application provides a vehicle-mounted receiving antenna, including:

[0006] Multiple mounting components, each mounting component including a first assembly end and a second assembly end, wherein the length of the first assembly end is greater than the length of the second assembly end;

[0007] Mounting plate, the mounting plate being connected to the first assembly end of the plurality of mounting components;

[0008] The antenna body is connected to the second assembly end of the plurality of mounting components.

[0009] In one feasible implementation, the vehicle-mounted receiving antenna further includes:

[0010] The first mounting bolt passes through the first assembly end and is connected to the mounting plate.

[0011] In one feasible implementation, the vehicle-mounted receiving antenna further includes:

[0012] The second mounting bolt passes through the second assembly end and is connected to the antenna body.

[0013] In one feasible implementation, the antenna body includes:

[0014] A housing having an opening, the housing being connected to the second assembly ends of the plurality of mounting components;

[0015] A magnetic core, wherein the magnetic core is disposed inside the housing;

[0016] A coil, which is sleeved on the magnetic core.

[0017] In one feasible implementation, the antenna body further includes:

[0018] A cover is provided at the opening of the housing.

[0019] In one feasible implementation, the antenna body further includes:

[0020] A magnetic core support is provided inside the housing, and a positioning groove is provided on the magnetic core support, in which the magnetic core is placed.

[0021] In one feasible implementation, the antenna body further includes:

[0022] A signal transmission line is connected to the coil and is used to transmit the signal received by the coil.

[0023] In one feasible implementation, the vehicle-mounted receiving antenna further includes:

[0024] A socket is located outside the housing, and the signal transmission line is connected to the socket.

[0025] In one feasible implementation, the vehicle-mounted receiving antenna further includes:

[0026] A plug, which is connected to the socket;

[0027] A cable, which is connected to the plug, is used to transmit signals to the train.

[0028] In one feasible implementation, the vehicle-mounted receiving antenna further includes:

[0029] The filler is disposed inside the antenna body and is polyurethane foam.

[0030] This application provides a vehicle-mounted receiving antenna, comprising multiple mounting components, each including a first mounting end and a second mounting end, the first mounting end being longer than the second mounting end; a mounting plate connected to the first mounting ends of the multiple mounting components; and an antenna body connected to the second mounting ends of the multiple mounting components. The mounting components for this vehicle-mounted receiving antenna meet the installation space limitations of subway vehicle antennas. The structural design of the mounting components effectively avoids other structures on the vehicle body, while keeping the antenna body as far away as possible from signal magnetic field interference generated by the wheels, improving the antenna's signal reception quality and stability, increasing its service life, and thus improving the cost-effectiveness of this application.

[0031] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0032] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0034] Figure 1 This illustration shows an installation diagram of a vehicle-mounted receiving antenna according to an embodiment of this application;

[0035] Figure 2 This paper shows a schematic diagram of the structure of a vehicle-mounted receiving antenna provided in an embodiment of this application;

[0036] Figure 3 A schematic diagram of the structure of the mounting component provided in an embodiment of this application is shown;

[0037] Figure 4 A schematic diagram of the internal structure of the antenna body provided in an embodiment of this application is shown;

[0038] Figure 5 This paper shows a top view of the internal structure of the antenna body provided in an embodiment of the present application;

[0039] Figure 6 A schematic diagram of the structure of the magnetic core support provided in an embodiment of this application is shown;

[0040] Figure 7 A schematic diagram of the external structure of the antenna body provided in an embodiment of this application is shown;

[0041] Figure 8 This paper shows a schematic diagram of the external side view structure of the antenna body provided in an embodiment of this application;

[0042] Figure 9 A top view of the external structure of the antenna provided in an embodiment of this application is shown.

[0043] In the picture:

[0044] 1. Mounting component; 2. Mounting plate; 3. Antenna body; 31. Magnetic core; 32. Coil; 33. Magnetic core bracket; 34. Signal transmission line; 35. Housing cover; 4. First mounting bolt; 5. Second mounting bolt; 6. Socket; 7. Plug; 8. Cable. Detailed Implementation

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Furthermore, 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] Subways, as rapid, high-capacity, electrically powered rail transit systems built in cities, boast advantages such as high speed, frequent trains, wide coverage, large capacity, and punctuality, making them ideal for daily urban travel and greatly alleviating surface traffic pressure. With the acceleration of urbanization in my country, the subway industry has ushered in unprecedented development opportunities, with subway lines continuously expanding and operating mileage steadily increasing. Against this backdrop, ensuring the stability and efficiency of subway communication systems is particularly important. As a key component for communication between subway vehicles and the outside world, the performance of onboard receiving antennas directly affects the signal reception quality, communication speed, and driving safety of subway vehicles. Therefore, domestically produced onboard receiving antennas have become an important choice.

[0049] Domestically produced vehicle-mounted receiving antennas offer multiple advantages. Firstly, through independent research and development and production, they can more precisely meet the specific communication performance requirements of my country's subway vehicles, improving the stability and accuracy of signal reception. Secondly, domestic production reduces reliance on imported antennas, decreases foreign exchange expenditure, promotes the development of related domestic industrial chains, and enhances the overall competitiveness of my country's subway industry. Furthermore, domestically produced vehicle-mounted receiving antennas contribute to technological innovation and industrial upgrading in my country's subway industry. Independent research and development allows for the continuous accumulation of technical experience, enhanced R&D capabilities, and the provision of more high-performance products with independent intellectual property rights for the subway industry. This not only helps improve the performance and safety of subway vehicles but also provides strong support for the sustainable development of the subway industry.

[0050] See Figure 1 and Figure 2 This illustration shows a schematic diagram of the installation structure of a vehicle-mounted receiving antenna according to an embodiment of this application, including:

[0051] Multiple mounting components 1, each mounting component 1 includes a first assembly end and a second assembly end, the length of the first assembly end being greater than the length of the second assembly end;

[0052] Mounting plate 2, which is connected to the first assembly end of multiple mounting parts 1;

[0053] Antenna body 3 is connected to the second assembly end of multiple mounting parts 1.

[0054] In the above embodiments, the number of mounting parts 1 is preferably two, which are trapezoidal sheet metal parts, preferably made of carbon steel with powder coating. The mounting parts 1 have a first mounting end and a second mounting end at the top and bottom of the trapezoid. The first mounting end is located at the long side of the trapezoid, and the second mounting end is located at the short side. Both the first and second mounting ends are plate-like structures with elongated mounting holes. Since the distance between the vehicle body mounting surface and the rail surface is 335mm, after installation on the train, the bottom surface of the antenna body 3 must be 170mm from the rail surface. The mounting surface is 335-170=165mm from the bottom surface of the antenna, the antenna body 3 is 70mm thick, and the distance between the first and second mounting ends of the mounting component 1 is preferably 165-70=95mm, ensuring that the distance between the bottom surface of the antenna and the rail surface after installation is the maximum allowable value, and can be adjusted to the allowable median value by adding washers; the mounting plate 2 is connected to the first mounting ends of the two back-to-back mounting components 1, and the antenna body 3 is connected to the second mounting ends of the two back-to-back mounting components 1. There can be two antenna bodies 3, that is, to achieve a dual-path hot backup effect.

[0055] Two trapezoidal mounting pieces 1 arranged opposite to each other allow the antenna 3 to be securely installed within a limited space, optimizing the space utilization at the bottom of the vehicle, avoiding other structures on the upper part of the vehicle body above the plug 7, and minimizing interference from the wheels on the signal magnetic field. This design satisfies the installation requirements of the antenna 3 without adversely affecting the vehicle's appearance and driving performance. Carbon steel is preferred as the material for the mounting pieces because it has high strength and rigidity, relatively low cost, and is easy to process and weld, making it suitable for manufacturing structural components that can withstand certain loads and stresses. This choice ensures the durability of the mounting pieces while reducing overall costs. The mounting plate 2 acts as an intermediary structure, helping to fix the mounting pieces 1 and the antenna 3 to the bottom of the vehicle. The antenna 3 is the main part for receiving signals and is securely installed at the bottom of the vehicle via the mounting pieces 1. If the receiving antenna is a dual-channel hot backup, the two antennas 3 are respectively installed in front of the first wheel assembly and behind the obstacle remover, above the center line of the rail.

[0056] See Figure 3 The diagram shows a structural schematic of the mounting component provided in an embodiment of this application. Further, a vehicle-mounted receiving antenna also includes:

[0057] The first mounting bolt 4 passes through the first assembly end and is connected to the mounting plate 2.

[0058] In the above embodiment, the first mounting bolt 4 is used to firmly connect the first assembly end of the mounting component 1 to the mounting plate 2, that is, to pass through the mounting hole in the shape of a pre-drilled elongated hole on the first assembly end, and then tighten it in the corresponding threaded hole on the mounting plate 2. The number of the first mounting bolt 4 is preferably four.

[0059] The use of the first mounting bolt 4 ensures that the connection between the mounting part 1 and the mounting plate 2 is firm and stable. This connection method can effectively resist the vibration and impact generated during vehicle operation, prevent the mounting part 1 from loosening or falling off the mounting plate 2, thereby ensuring the stability of the antenna body 3 and the signal reception quality.

[0060] Furthermore, a vehicle-mounted receiving antenna also includes:

[0061] The second mounting bolt 5 passes through the second assembly end and is connected to the antenna body 3.

[0062] In the above embodiment, the second mounting bolt 5 is used to firmly connect the second assembly end of the mounting component 1 to the antenna body 3, that is, through the pre-drilled elongated mounting hole on the second assembly end, and then tightened on the corresponding threaded hole on the antenna body 3 housing. The number of the second mounting bolt 5 is preferably four.

[0063] By using bolted connections, the installation process between the antenna body 3 and the mounting component 1 becomes simpler and faster. Installers only need to pass the second mounting bolt 5 through the mounting hole and tighten it, eliminating the need for complex welding or other connection operations. This significantly improves installation efficiency and reduces installation costs.

[0064] See Figure 4 and Figure 5 The diagram shows the internal structure of the antenna body provided in the embodiment of this application. Further, the antenna body 3 includes:

[0065] The housing has an opening and is connected to the second assembly end of a plurality of mounting parts 1;

[0066] Magnetic core 31 is located inside the housing;

[0067] Coil 32 is mounted on magnetic core 31.

[0068] In the above embodiments, the housing is also made of carbon steel sheet metal welding, with the surface sprayed with anti-rust coating, the magnetic core 31 is a ferrite magnetic rod, preferably with a diameter of 20 mm and a length of 200 mm, and the coil 32 is enameled wire, preferably with a diameter of 0.29 mm. The coil 32 is made by winding several turns in the middle part of the magnetic core 31 after being separated from the magnetic core 31 by an insulating film.

[0069] The housing design not only protects the internal components from interference and damage from the external environment, but also enhances the structural stability of the antenna body 3 through its connection with the mounting component 2. The magnetic core 31 and coil 32 are responsible for converting the received electromagnetic waves into electrical signals, or converting electrical signals into electromagnetic waves for transmission, i.e., they are responsible for the communication function of this application.

[0070] When this application is applied to dual-path hot backup technology, the number of magnetic cores 31 and coils 32 needs to be adjusted. Specifically, two magnetic cores 31 and two coils 32 are required, with the two coils 32 wound around the two magnetic cores 31 respectively. The two magnetic cores 31 are arranged parallel to each other within the housing. Due to the need to consider the mutual inductance of the two coils, the number of turns and the height position of the coils 32 within the housing may need to be changed. When applied to different signal systems with varying requirements for coil frequency response characteristics, adjustments can be made to the magnetic core specifications, the number of coil turns, and the height position to adapt to the new requirements.

[0071] Furthermore, antenna body 3 also includes:

[0072] The cover 35 is located at the opening of the housing.

[0073] In the above embodiment, the cover 35 is made of nylon and covers the opening of the shell, and is closable to the shell.

[0074] The cover 35 can be easily installed on the housing by screws, clips or other fastening methods, making the installation and maintenance of the antenna body 3 simpler and faster. The nylon material ensures that the signal magnetic field can reach the coil.

[0075] See Figure 6 The diagram shows a schematic of the magnetic core support structure provided in an embodiment of this application. Further, the antenna body 3 also includes:

[0076] The magnetic core support 33 is located inside the housing. The magnetic core support 33 has a positioning groove, and the magnetic core 31 is located in the positioning groove.

[0077] In the above embodiment, the magnetic core bracket is made of plastic and is fixed to the bottom of the housing. The magnetic core bracket has a positioning groove with a shape that matches the magnetic core 31. Preferably, there are two magnetic core brackets, which are snapped onto both ends of the magnetic core 31.

[0078] The magnetic core bracket 33 is fixed to the bottom of the housing, providing stable support for the magnetic core 31. This design helps reduce vibration and shaking of the magnetic core 31 during use, thereby improving the durability of the antenna body 3. The height of the plastic magnetic core bracket 33 determines the distance from the rail surface to ensure frequency response characteristics. This ensures that the antenna body has higher efficiency and accuracy in receiving and transmitting signals, thereby improving the reliability and stability of vehicle communication and navigation functions.

[0079] When this application is applied to dual-path hot backup technology, there are four magnetic core brackets 33, which are respectively snapped onto the two ends of the two magnetic cores 31.

[0080] Furthermore, antenna body 3 also includes:

[0081] Signal transmission line 34 is connected to coil 32 and is used to transmit signals received by coil 32.

[0082] In the above embodiment, the number of signal transmission lines 34 is preferably two, which are connected to both ends of the coil 32, and the other end of the two signal transmission lines 34 is connected to the socket 6.

[0083] As a key component connecting the coil 32 and the socket 6, the signal transmission line 34 directly affects the signal transmission efficiency of the antenna body 3. Preferably, there are two signal transmission lines 34, which can more effectively transmit the signal received by the coil, reduce signal loss, and improve the efficiency and accuracy of signal transmission.

[0084] When this application is applied to dual-channel hot backup technology, the number of signal transmission lines 34 is preferably four, which are respectively connected to the two ends of the two coils 32.

[0085] The electrical characteristics required for this application are: inductance (measurement frequency 1000Hz) ≥30mH; DC resistance: ≤14Ω; insulation resistance of receiving antenna: ≥30MΩ.

[0086] The frequency response characteristics of the receiving antenna are required to be: (after each channel is connected in series)

[0087]

[0088] Scientific and rational electrical performance design, internal structure, and material selection are crucial for ensuring stable signal transmission. The key is to calculate and test the matching of the ferrite core cross-sectional area and length with the number of coil turns and wire diameter, ensuring that the frequency response characteristics meet the requirements while satisfying the specified resistance and inductance. Specifically, according to the law of electromagnetic induction, the induced electromotive force is directly proportional to the number of coil turns and the rate of change of magnetic flux; the magnetic flux at the coil is directly proportional to the core permeability and core area, and inversely proportional to the distance from the coil to the current-carrying conductor. Adjusting and matching these variables will satisfy the aforementioned electrical parameter requirements.

[0089] See Figure 7 , Figure 8 and Figure 9 The diagram shows the external structure of the antenna body provided in an embodiment of this application. Further, a vehicle-mounted receiving antenna also includes:

[0090] Socket 6 is located outside the housing, and signal transmission line 34 is connected to socket 6.

[0091] In the above embodiments, the socket 6 is preferably a five-pin aviation socket, which is designed as a connection interface between the signal transmission line 34 and the train communication system and is installed on the outside of the housing.

[0092] Aviation-grade sockets are renowned for their superior connection reliability. Using such sockets ensures a stable connection between signal transmission line 34 and the train communication system, reducing signal loss or interruption caused by poor connections. The five-pin design allows socket 6 to support signal transmission or power supply through multiple independent channels, meeting the needs of onboard receiving antennas in complex application scenarios.

[0093] Furthermore, a vehicle-mounted receiving antenna also includes:

[0094] Plug 7 is connected to socket 6;

[0095] Cable 8 is connected to plug 7 and is used to transmit signals to the train.

[0096] In the above embodiments, the plug 7 is preferably an aviation plug, and the cable is provided with a protective tube assembly.

[0097] By introducing the connection design of plug 7 and socket 6, the connection between the on-board receiving antenna and the train communication system becomes more robust and reliable. The excellent connection performance and plug-and-play resistance of the aviation plug ensure the continuity and stability of signal transmission, reducing signal loss or interruption caused by poor connection or looseness. The sheath assembly on cable 8 not only enhances the mechanical strength of the cable but also provides an extra layer of protection against cable damage caused by external friction, compression, or abrasion. This extends the cable's service life and reduces maintenance costs.

[0098] Furthermore, a vehicle-mounted receiving antenna also includes:

[0099] The filler is located inside the antenna body 3 and is polyurethane foam.

[0100] In the above embodiment, after the nylon shell cover 35 is placed on, a polyurethane foam potting process is performed to fill the cavity inside the antenna body 3 shell with foam.

[0101] By filling the interior of antenna body 3 with polyurethane foam, the overall structural strength of the antenna body can be significantly enhanced. Polyurethane foam possesses excellent mechanical properties and impact resistance, effectively resisting physical impacts and vibrations from the external environment, protecting the internal electronic components from damage. Polyurethane foam also exhibits excellent waterproof and moisture-proof properties. Filling the cavity inside antenna body 3 with foam through a potting process effectively prevents moisture and humidity from penetrating the antenna, protecting electronic components from corrosion and damage, and extending the antenna's service life.

[0102] This application provides a schematic diagram of the installation structure of a vehicle-mounted receiving antenna, including: multiple mounting components 1, each mounting component 1 having a first assembly end and a second assembly end, the length of the first assembly end being greater than the length of the second assembly end; a mounting plate 2, the mounting plate 2 being connected to the first assembly ends of the multiple mounting components 1; and an antenna body 3, the antenna body 3 being connected to the second assembly ends of the multiple mounting components 1. The mounting component of this application for a vehicle-mounted receiving antenna satisfies the installation space limitations of subway vehicle-mounted antennas. The structural design of the mounting component effectively avoids other structures on the vehicle body, while keeping the antenna body as far away as possible from signal magnetic field interference generated by the wheels, improving the signal reception quality and stability of the antenna, increasing its service life, and thus improving the cost-effectiveness of this application.

[0103] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application. Those skilled in the art will understand that the modules in the apparatus of the embodiment can be distributed within the apparatus of the embodiment as described, or can be modified to be located in one or more apparatuses different from this embodiment. The modules of the above-described embodiment can be combined into one module, or further divided into multiple sub-modules.

[0104] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of any particular implementation scenario. The above disclosures are merely a few specific implementation scenarios of this application; however, this application is not limited thereto, and any variations conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A vehicle-mounted receiving antenna, characterized in that, include: Multiple mounting components (1), each mounting component (1) includes a first assembly end and a second assembly end, wherein the length of the first assembly end is greater than the length of the second assembly end; Mounting plate (2), which is connected to the first assembly end of a plurality of mounting components (1); Antenna body (3) is connected to the second assembly end of the plurality of mounting parts (1).

2. The vehicle-mounted receiving antenna according to claim 1, characterized in that, Also includes: The first mounting bolt (4) passes through the first assembly end and is connected to the mounting plate (2).

3. The vehicle-mounted receiving antenna according to claim 1, characterized in that, Also includes: The second mounting bolt (5) passes through the second assembly end and is connected to the antenna body (3).

4. The vehicle-mounted receiving antenna according to claim 1, characterized in that, The antenna body (3) includes: A housing having an opening, the housing being connected to the second assembly ends of a plurality of mounting components (1); A magnetic core (31) is disposed inside the housing; A coil (32) is sleeved on the magnetic core (31).

5. The vehicle-mounted receiving antenna according to claim 4, characterized in that, The antenna body (3) also includes: A cover (35) is provided at the opening of the housing.

6. The vehicle-mounted receiving antenna according to claim 4, characterized in that, The antenna body (3) also includes: A magnetic core support (33) is provided inside the housing. A positioning groove is provided on the magnetic core support (33), and the magnetic core (31) is provided in the positioning groove.

7. The vehicle-mounted receiving antenna according to claim 4, characterized in that, The antenna body (3) also includes: A signal transmission line (34) is connected to the coil (32) and is used to transmit the signal received by the coil (32).

8. The vehicle-mounted receiving antenna according to claim 7, characterized in that, Also includes: A socket (6) is disposed outside the housing, and the signal transmission line (34) is connected to the socket (6).

9. The vehicle-mounted receiving antenna according to claim 8, characterized in that, Also includes: A plug (7) is connected to the socket (6); Cable (8), which is connected to plug (7), is used to transmit signals to the train.

10. The vehicle-mounted receiving antenna according to claim 1, characterized in that, Also includes: The filler is disposed inside the antenna body (3) and is polyurethane foam.

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