Integrated Beidou vehicle-mounted subscriber machine

Abstract

The utility model discloses an integrated Beidou vehicle-mounted user machine, and belongs to the technical field of satellite navigation. Comprising an antenna housing, a cavity, a multi-frequency antenna, a radio frequency channel, a baseband signal processing module, a power supply module and a base, the upper part of the cavity is hermetically connected with the antenna housing; the multi-frequency antenna is positioned in the antenna housing; the lower part of the cavity is hermetically connected with the base; the cavity comprises an upper chamber and a lower chamber; the upper chamber is used for installing a radio frequency channel, and the lower chamber is used for installing a baseband signal processing module and a power supply module; and the baseband signal processing module is connected with the power supply module through a probe. The cavity is divided into the upper cavity and the lower cavity, the radio frequency channel, the baseband signal processing module and the power module are installed in the cavity, the multi-frequency antenna is arranged in the antenna housing above the cavity, and on the premise that normal work of all the modules is guaranteed, the whole structure is more compact, the occupied area is small, and the weight is low.

Description

Technical Field

[0001] The utility model relates to satellite communication equipment, in particular to an integrated Beidou vehicle-mounted user terminal, belonging to the technical field of satellite navigation. Background Art

[0002] The BeiDou-3 satellite positioning and navigation system is an important space-time information infrastructure in my country. It is characterized by high precision, high sensitivity, all-weather and full coverage. It is an important part of my country's electronic information system and plays an important role in improving my country's space-time capabilities such as autonomous navigation and positioning, scene situation monitoring, satellite communications, and precise timing. It has independent intellectual property rights.

[0003] With the completion of the networking of the BeiDou-3 positioning and navigation system, the RNSS positioning accuracy, timing accuracy, speed measurement accuracy, and the amount of data transmitted in a single short message communication have all been greatly improved. The development of a universal BeiDou equipment series that adapts to the new system plays a vital role in the long-term orderly development of my country's positioning and navigation equipment, and is also an urgent need to adapt to the new navigation system. Existing BeiDou vehicle-mounted user equipment generally has shortcomings such as large size and heavy weight, which cannot meet the needs of use in different scenarios, affecting the user experience. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an integrated Beidou vehicle-mounted user terminal with compact structure and light weight.

[0005] In order to solve the above technical problems, the utility model provides an integrated Beidou vehicle-mounted user terminal, including a radome, a cavity, a multi-frequency antenna, a radio frequency channel, a baseband signal processing module, a power module and a base;

[0006] The upper part of the cavity is sealed and connected to the radome, and the multi-frequency antenna is located in the radome; the lower part of the cavity is sealed and connected to the base;

[0007] The cavity comprises an upper chamber and a lower chamber; the upper chamber is used to install a radio frequency channel, and the lower chamber is used to install a baseband signal processing module and a power supply module;

[0008] The baseband signal processing module is connected to the power supply module via a probe.

[0009] In the utility model, the upper chamber is divided into four independent chambers, and the radio frequency channel includes an S-frequency low noise amplifier, a B1 / B2 / B3-frequency low noise amplifier, a combiner, and a power amplifier;

[0010] The S-frequency low noise amplifier, B1 / B2 / B3-frequency low noise amplifier, combiner, and power amplifier are respectively arranged in four chambers.

[0011] In the utility model, the power module includes a power information board and a power filter; the power information board is connected to the power filter;

[0012] The power filter is located at the lower part of the cavity.

[0013] In the utility model, sealing rings are respectively arranged on the top surface and the bottom surface of the cavity.

[0014] In the utility model, the multi-frequency antenna is fixedly connected to the cavity through a connecting plate.

[0015] In the utility model, the cavity is made of 7075 aluminum alloy.

[0016] In the utility model, a plurality of vertically distributed heat sinks are arranged at intervals on the outer periphery of the cavity.

[0017] The beneficial effects of the utility model are: (1) by dividing the cavity into an upper cavity and a lower cavity, the radio frequency channel, the baseband signal processing module and the power module are installed respectively, and the multi-frequency antenna is arranged in the antenna cover above the cavity, under the premise of ensuring the normal operation of each module, the whole structure is more compact, occupies a smaller area and is lighter in weight; (2) the upper cavity is divided into four independent chambers to accommodate the installation of different modules; (3) the power module includes a power information board and a power filter, the power filter is located in the lower part of the cavity, and the power filter performs DC filtering on the power supply to meet the requirements of conducted emission and conducted sensitivity limits and reduce interference to other internal modules; (4) sealing rings are respectively provided on the top and bottom surfaces of the cavity to ensure the reliability of the sealing of the entire user machine; (5) the cavity is made of 7075 aluminum alloy, which is light in weight and has good thermal conductivity, meeting the requirements of lightweight design and heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the expanded structure of the integrated Beidou vehicle-mounted user terminal of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the integrated Beidou vehicle-mounted user terminal of the utility model;

[0021] Figure 3 is a schematic diagram of the cavity structure;

[0022] Figure 4is a schematic diagram of the cavity structure in Example 2;

[0023] In the figure, 1-radome, 2-multi-frequency antenna, 3-RF channel, 4-cavity, 5-power information board, 6-power filter, 7-baseband signal processing module, 8-mounting base, 9-shielding plate, 10-connecting plate, 11-wiring port, 12-sealing ring, 13-heat sink, 4-1-upper chamber 4-1, 4-2-lower chamber, 4-3-rib plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected 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 the present invention can be understood according to specific circumstances.

[0030] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] like Figures 1 to 3 As shown, the integrated Beidou vehicle-mounted user terminal provided in this embodiment includes a radar cover 1, a multi-frequency antenna 2, a radio frequency channel 3, a cavity 4, a power information board 5, a power filter 6, a baseband signal processing module 7 and a mounting base 8.

[0032] In order to make full use of the space and reduce the internal wiring distance, the multi-frequency antenna 2 adopts an integrated design. The multi-frequency antenna 2 is fixed on the cavity 4 through the connecting plate 10 and connected to the top of the cavity 4. In this embodiment, the multi-frequency antenna 2 includes B1 frequency, B3 frequency, B2 frequency, S frequency and L frequency antenna arrays, and adopts a uniform circular array with the center as the main array. It can receive RDSS-S, RNSS-B3, RNSS-B1, RNSS-B2 satellite signals, and supports RDSS-Lf0~Lf5 frequency bands to send information to the airspace. The reflective surface size is 120mm in diameter. The multi-frequency antenna 2 can receive Beidou-3 B1 frequency, B2 frequency, B3 frequency, S frequency and other frequency satellite navigation and positioning radio frequency signals, and transmit them to radio frequency channel 3. At the same time, the Lf0~Lf5 frequency signals of radio frequency channel 3 can be transmitted.

[0033] The cavity 4 is divided into an upper chamber and a lower chamber 4-2 to meet the installation requirements of different functional modules. The upper chamber is divided into four independent chambers for installing the four functional modules of the RF channel 3, namely, the S-frequency low noise amplifier, the B1 / B2 / B3-frequency low noise amplifier, the combiner, and the power amplifier.

[0034] The lower chamber 4-2 is used to accommodate and install the baseband signal processing module 7 and the power module. A shielding plate 9 is provided at the bottom where the baseband signal processing module 7 and the power module are installed.

[0035] The lower chamber 4-2 is provided with a plurality of ribs 4-3 which are not distributed in a planned manner, and the ribs 4-3 divide the lower chamber 4-2 into a plurality of areas. The baseband signal processing module 7 is provided with strip holes at positions corresponding to the ribs 4-3 to facilitate the installation of the baseband signal processing module. The ribs 4-3 can not only ensure the strength of the cavity, but also provide individual shielding for each unit on the baseband signal processing module 7 to a certain extent, thereby improving the reliability of the operation of the baseband signal processing module 7.

[0036] A wiring port 11 is provided on the side of the cavity 4, and the wiring port 11 is used to connect an integrated port cable.

[0037] The cavity 4 in this embodiment is made of 7075 aluminum alloy, which is light in weight, high in strength, good in plasticity, and has excellent thermal conductivity, and can meet the requirements of light weight and easy processing.

[0038] The top and bottom of the cavity 4 are respectively provided with an annular groove, in which a sealing ring 12 is arranged. The annular groove can effectively limit the position of the sealing ring 12, and prevent the sealing ring 12 from moving during use, thereby affecting the sealing effect.

[0039] The RF channel 3 is composed of two functional units: the RF receiving channel and the RF transmitting channel. Among them, the RF receiving channel mainly realizes the filtering and amplification of the RF signal, and the up and down frequency conversion; the RF transmitting channel mainly realizes the power amplification and filtering of the RF signal. In this embodiment, the RF channel 3 is designed as an integral module, and the internal independent chambers are respectively the S-frequency low noise amplifier, the B1 / B2 / B3 frequency low noise amplifier, the combiner, and the power amplifier, which correspond to the four independent chambers installed on the upper chamber. The S-frequency low noise amplifier and the B1 / B2 / B3 frequency low noise amplifier are connected to the multi-frequency antenna 2; the input end of the combiner is connected to the S-frequency low noise amplifier and the B1 / B2 / B3 frequency low noise amplifier, the output end of the combiner is connected to the baseband signal processing module 7, and the output end of the power amplifier is connected to the baseband signal processing module 7.

[0040] In this embodiment, the power module mainly provides stable power supply for each functional module chip. The power module includes a power information board 5 and a power filter 6. The baseband signal processing module 7 is connected to the power information board 5 by a probe. The power information board 5 is connected to the power filter 6. The power filter 6 is located at the bottom of the cavity 4. In this embodiment, the power filter 6 uses the existing MBT-10A standard module packaging product. The power filter 6 is installed at the bottom of the user machine to perform DC filtering on the power supply, meet the requirements of conducted emission and conducted sensitivity limits, and reduce interference to other internal functional modules.

[0041] In this embodiment, each of the above-mentioned functional modules has existing technologies. Since this technical solution does not involve improvements to the specific modules themselves, each module will not be described in detail here.

[0042] In this embodiment, the specific installation sequence of the integrated Beidou vehicle-mounted user terminal is as follows:

[0043] 1) The power filter 6 is installed in the lower part of the cavity 4 and fastened by screws.

[0044] 2) Install the RF channel 3 in each chamber of the upper half of the cavity 4 and fix it with studs.

[0045] 3) Install the baseband signal processing board and the power information board 5 inside the lower half of the cavity 4 and fix them with screws.

[0046] 4) Weld the probes between the upper and lower modules to achieve electrical connection between the modules.

[0047] 5) Install the sealing ring 12 on the upper part of the cavity 4 into the annular groove, then install the antenna cover 1 on the top of the cavity 4 and fasten it with screws.

[0048] 6) Install the sealing ring 12 at the bottom of the cavity 4 in the annular groove, then install the mounting base 8 on the cavity 4 and fasten it with screws.

[0049] 7) Install the bottom plate on the bottom of the cavity 4 and fix it to the bottom of the cavity 4 with screws.

[0050] In the internal layout of this embodiment, the layout division of the internal modules is uniformly planned so that each module has independent functions, which is convenient for operation, maintenance and debugging. It is also conducive to standardization and serialization. At the same time, the connection and routing between modules are fully considered, the partitions are planned, the mutual influence and interference are reduced, the heat source aggregation is reduced, and the heat insulation, heat conduction, shielding and other means are combined.

[0051] like Figure 4 As shown, in Example 2, multiple heat sinks 13 are arranged at intervals on the periphery of the cavity 4, and the multiple heat sinks 13 are distributed vertically, and other structural arrangements are the same as those in the above-mentioned Example 1. Since the power module is a component that is prone to heat generation, in this embodiment, the power module is located near the center of the bottom of the cavity, and multiple heat sinks 13 are arranged along the direction of heat transfer of the cavity 4, which can effectively improve the heat conduction efficiency. The heat on the heat sink 13 is dissipated by natural convection, so that the cross section of the heat sink is parallel to the horizontal direction, because hot air rises, which is more conducive to the rapid circulation of air.

[0052] As those skilled in the art should know, the number of heat sinks 13 is as large as possible, so as to effectively increase the outer surface area of ​​the heat sink 13, and more heat can be quickly convected to the surrounding air.

[0053] The utility model provides an idea of ​​an integrated Beidou vehicle-mounted user terminal. There are many methods and ways to implement the technical solution. The above is only the preferred implementation of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. Integrated Beidou vehicle-mounted user terminal, characterized by: It includes a radome, a cavity, a multi-frequency antenna, a radio frequency channel, a baseband signal processing module, a power module and a base; The upper part of the cavity is sealed and connected to the radome, and the multi-frequency antenna is located in the radome; the lower part of the cavity is sealed and connected to the base; The cavity comprises an upper chamber and a lower chamber; the upper chamber is used to install a radio frequency channel, and the lower chamber is used to install a baseband signal processing module and a power supply module; The baseband signal processing module is connected to the power supply module via a probe.

2. According to claim 1, the integrated Beidou vehicle-mounted user terminal is characterized in that: The upper chamber is divided into four independent chambers, and the radio frequency channel includes an S-frequency low noise amplifier, a B1 / B2 / B3-frequency low noise amplifier, a combiner, and a power amplifier; The S-frequency low noise amplifier, B1 / B2 / B3-frequency low noise amplifier, combiner, and power amplifier are respectively arranged in four chambers.

3. The integrated Beidou vehicle-mounted user terminal according to claim 1 or 2, characterized in that: The power module includes a power information board and a power filter; the power information board is connected to the power filter; The power filter is located at the lower part of the cavity.

4. The integrated Beidou vehicle-mounted user terminal according to claim 3 is characterized in that: The top surface and the bottom surface of the cavity are respectively provided with sealing rings.

5. The integrated Beidou vehicle-mounted user terminal according to claim 4 is characterized in that: The multi-frequency antenna is fixedly connected to the cavity via a connecting plate.

6. The integrated Beidou vehicle-mounted user terminal according to claim 1 or 2, characterized in that: The cavity is made of 7075 aluminum alloy.

7. The integrated Beidou vehicle-mounted user terminal according to claim 1 or 2, characterized in that: A plurality of vertically distributed heat sinks are arranged at intervals on the periphery of the cavity.

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