CN113873346A - Network device - Google Patents
Network device Download PDFInfo
- Publication number
- CN113873346A CN113873346A CN202010615355.7A CN202010615355A CN113873346A CN 113873346 A CN113873346 A CN 113873346A CN 202010615355 A CN202010615355 A CN 202010615355A CN 113873346 A CN113873346 A CN 113873346A
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- Prior art keywords
- housing
- shell
- assembly
- antenna
- network device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
Abstract
The embodiment of the invention provides network equipment, which comprises an antenna assembly and a shell, wherein the shell comprises a first shell and a second shell capable of rotating or sliding relative to the first shell, a main board assembly is arranged on the first shell and electrically connected with the antenna assembly, a sub-board assembly is arranged on the second shell and electrically connected with the main board assembly; the network equipment further comprises a prompting device connected with the antenna assembly, the antenna assembly is arranged on the first shell, the prompting device is arranged on the second shell, so that the antenna assembly can move when the first shell rotates or slides relative to the second shell, and the prompting device is used for indicating the strength of a signal transmitted and received by the antenna assembly.
Description
Technical Field
The invention relates to the technical field of communication, in particular to network equipment.
Background
A Customer Premise Equipment (CPE) is a terminal device for Wireless broadband access, and the CPE generally converts a network signal sent by a base station into a Wireless Fidelity (WiFi) signal.
At present, CPE network equipment has two types, an external antenna and an internal antenna, where the external antenna generally adjusts the orientation of the antenna in a manual manner, and the internal antenna needs a specially-assigned person to debug the base of the antenna, or a user can rotate or move the CPE network equipment to adjust the strength of a signal received by the antenna, but these adjustment manners are not only single in operation, but also inconvenient.
Disclosure of Invention
The embodiment of the present invention mainly aims to provide a network device, which can be adjusted to a preset position with a strong signal according to a prompting device to send and receive the signal, and has the advantages of simple structure, convenient operation, and even capability of improving user experience.
To achieve the above object, an embodiment of the present invention provides a network device, which includes
An antenna assembly;
the antenna assembly comprises a shell and a plurality of antenna elements, wherein the shell comprises a first shell and a second shell capable of rotating or sliding relative to the first shell, a mainboard assembly is arranged on the first shell and electrically connected with the antenna assembly, and a daughter board assembly is arranged on the second shell and electrically connected with the mainboard assembly;
the network equipment further comprises a prompting device connected with the antenna assembly, the antenna assembly is arranged on the first shell, the prompting device is arranged on the second shell, so that the antenna assembly can move when the first shell rotates or slides relative to the second shell, and the prompting device is used for indicating the strength of a signal transmitted and received by the antenna assembly.
According to the network equipment provided by the embodiment of the invention, the antenna assembly, the main board assembly and the sub board assembly are separately arranged on different shells, so that the antenna assembly and the main board assembly can be adjusted in position through rotation or sliding of the first shell and the second shell, the antenna assembly can be adjusted to the preset position with stronger signals according to the prompting device to receive and send signals, the condition that professional engineering personnel are required to adjust the direction of the antenna assembly in the installation process of the network equipment is avoided, or the direction of the antenna assembly can be adjusted when a user installs the network equipment by himself, the influence of factors such as frequency bands, equipment installation positions and obstacle interference is avoided, the structure is simple, the operation is convenient, and the user experience can be even improved.
Drawings
Fig. 1 is a schematic structural diagram of a network device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the network device shown in fig. 1.
Fig. 3 is a schematic structural diagram of the network device shown in fig. 1.
Fig. 4 is a schematic structural diagram of the network device shown in fig. 1.
Fig. 5 is an exploded schematic view of the network device shown in fig. 1.
Fig. 6 is a partial block diagram of the network device shown in fig. 1.
Fig. 7 is a partial block diagram of the network device shown in fig. 1.
Fig. 8 is a schematic structural diagram of a network device according to a seventh embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Example one
Referring to fig. 1-7, an embodiment of the present invention provides a network device, which includes a housing and an antenna assembly 30, where the housing includes a first housing 10 and a second housing 20, the second housing 20 can rotate or slide relative to the first housing 10, the first housing 10 is provided with a motherboard assembly 40, the motherboard assembly 40 is electrically connected to the antenna assembly 10, the second housing 20 is provided with a daughter board assembly 50, and the daughter board assembly 50 is electrically connected to the motherboard assembly 40. Wherein, the network device further comprises a prompting device 60 connected with the antenna assembly 30, the antenna assembly 30 is disposed on the first housing 10, the prompting device 30 is disposed on the second housing 20, so that the antenna assembly 30 can move when the first housing 10 rotates or slides relative to the second housing 20, the prompting device 60 is used for indicating the strength of the signal transmitted and received by the antenna assembly 30, and the orientation of the signal received by the antenna assembly 30 is adjusted according to the strength of the signal transmitted and received by the antenna assembly 30. In this way, the daughter board assembly 50 and the motherboard assembly 40 are separately arranged and combined with the prompting device 60, so that signals of the network device can reach an optimal state through adjustment, and the efficiency of adjusting the antenna direction is improved.
For example, the antenna assembly 30 may include a first antenna unit for receiving millimeter wave signals and/or a second antenna unit for receiving terahertz signals, but is not limited to millimeter wave signals or terahertz signals, the number of the first antenna unit and/or the second antenna unit may be multiple, and the multiple first antenna units and/or the second antenna units are arranged along the circumferential direction of the first housing 10. Since the signals have directivity, the plurality of first antenna units and/or second antenna units circumferentially arranged in the first housing 10 enable the network device to transmit and receive signals in all directions, thereby improving the capability of the network device to transmit and receive signals.
It should be noted that the network device may be a CPE, a router, a mobile terminal, an antenna device, and the like; the daughter board assembly 50 is a circuit board on which a basic circuit and a plurality of electronic components are mounted, and may include a power supply control circuit board and the like; the prompting device 60 may include a sound, an indicator light, a vibrator, etc. for indicating the intensity of the signals transmitted and received by the antenna assembly 30, but the application is not limited thereto.
After adopting above technical scheme, because mainboard subassembly 40 and antenna module 30 and daughter board subassembly 50 are through setting up on the casing of difference, make mainboard subassembly 40 and antenna module 30 can follow first casing 10 and rotate or remove in order to adjust the position and the direction of antenna module 30 relative second casing 20, can know the intensity of antenna module 30 receiving and dispatching signal through suggestion device 60 again simultaneously in order to inform the user need rotate or the direction of slip first casing 10, ensure that the antenna module can adjust to the stronger preset position of signal in order to receive and dispatch signal according to suggestion device, and is simple in structure, and convenient for operation, user's experience can even be improved.
In an alternative embodiment, the antenna assembly 30 has a sheet structure, so that the antenna assembly 30 can be attached to the inner wall of the first housing 10, wherein the antenna assembly 30 is connected to the main board assembly 40 through a conductor, so that the main board assembly 40 can control the antenna assembly 30 to transmit and receive signals.
In an alternative embodiment, as shown in fig. 1 to 7, the antenna assembly 30 includes an antenna module and a support frame, wherein a hollow portion 11 is provided on the first housing 10, and the antenna module is disposed in the hollow portion 11 through the support frame; and/or first casing 10 is the sleeve structure, and second casing 20 is located the below of first casing 10 and cup joints the setting with first casing 10 is coaxial, simple structure, and easy to assemble, also convenient operation simultaneously, be about to the position that second casing 20 placed the face relatively unchangeable, can realize antenna module's position transform through rotating first casing 10 for the direction of adjustment antenna module makes antenna module's signal adjustment to optimum.
In an alternative embodiment, the hollow portion 11 rotates around the central axis of the first housing 10 or the second housing 20, and a part of the second housing 20 is accommodated in the hollow portion 11, so that the first housing 10 can rotate relative to the second housing 20 to adjust the direction of the antenna module, and cooperate with the prompting function of the prompting device 60 to optimize the signal.
Exemplarily, the second housing 20 includes a base and a supporting portion, both ends of the hollow portion 11 may be provided with openings, and after the first housing 10 is mounted on the supporting portion, one end of the hollow portion 11 opposite to the base is sealed by a cover plate; or only one end of the hollow part 11 is provided with an opening, and the first shell 10 is sleeved on the supporting part through the opening of the hollow part 11, so that the first shell 10 can rotate relative to the hollow part 11.
Wherein, first casing 10 and second casing 20 clearance fit, the diameter of well kenozooecium 11 is the crescent from the one end of backing away from the base to the one end towards the base, conveniently installs first casing 10 in the supporting part, plays the axial positioning function.
The shapes of the first casing 10 and the second casing 20 may be a column shape or other irregular shapes, the materials of the first casing 10 and the second casing 20 may be, but not limited to, insulating materials such as plastics, and the central axis may be an element that exists in a solid state or may not be an element that exists in a solid state, and is only a virtual concept of the rotation center of the first casing 10 or the second casing 20.
In an alternative embodiment, the housing further includes a first bearing member sleeved outside the second housing 20, and the first housing 10 is connected to the second housing 20 through the first bearing member.
Exemplarily, the supporting portion of the second housing 20 is provided with a bearing mounting portion, the inner side wall of the hollow portion 11 is provided with a bearing fixing portion, the inner ring of the first bearing is mounted on the bearing mounting portion, and the outer ring of the first bearing is mounted on the bearing fixing portion, so that the first housing 10 is sleeved on the outer side of the second housing 20, and is used for limiting the first housing 10 to rotate in the direction of the central axis, that is, the first housing 10 rotates around the central axis, and the direction of the central axis is fixed, which is simple in structure and facilitates the adjustment of the position of the antenna assembly 30.
After the above technical solution is adopted, when the direction of the antenna assembly 30 is adjusted, only the first housing 10 needs to be rotated, so that the antenna assembly 30 can rotate along with the rotation of the first housing 10 relative to the second housing 20, the sub-board assembly 50 on the second housing 20 and the components on the second housing 20 are kept stationary, and the prompting function of the prompting device 60 is matched, so that the signal of the antenna assembly 30 reaches the optimal state.
In an alternative embodiment, the prompting device 60 includes a light source connected to the antenna assembly 30, and the light source displays light of different colors or brightness depending on the intensity of the signal received by the antenna assembly 30 when the first housing 10 is rotated relative to the second housing 20.
Illustratively, the light source has two display states, red and green, respectively, corresponding to the intensity of the signal, i.e., the change in the color of the light source from red to green indicates an enhanced state, and in particular, the brightness of green gradually increases, and the signal of the antenna assembly 30 is in an optimal state.
It should be noted that, when the signal strength of the received signal of the antenna element 30 changes, the brightness of the light source will change, so as to clearly inform the user of the steady state of the signal strength of the antenna element 30, i.e. whether the signal strength fluctuates or not and the size of the fluctuation.
After the technical scheme is adopted, when the first housing 10 drives the antenna assembly 30 to rotate relative to the second housing 20, the antenna assembly 30 is in a signal searching state, when the first housing 10 rotates to a position where the signal of the antenna assembly 30 is stronger, the green brightness of the light source is greater than the brightness of the first housing 10 at other rotation angles, the first housing 10 stops rotating, that is, the prompting device 60 is used for indicating the direction of the signal received by the antenna assembly 30, and a user can adjust the rotation direction of the first housing 10 according to the color and the brightness of the light source, so that the experience effect of the user can be improved. In addition, the intensity of the signal of the antenna assembly 30 is indicated by the color and brightness of the light source, which is not only easier to implement, but also makes the whole network device more beautiful.
Illustratively, the prompting device 60 is disposed around the base of the second housing 20, and when the network device is in operation, the prompting device 60 forms an aperture to remind the user of the strength of the signal when the antenna assembly 30 is in this position.
In an alternative embodiment, the prompting device 60 further includes a light guide disposed on the second housing 20, wherein the light source is disposed toward the light guide, and the light guide is used for guiding the light emitted from the light source to exit the second housing 20, so that the light guide can collect the light emitted from the light source, and prevent the light from being too diffused to cause low brightness, thereby more clearly indicating the direction of the signal received by the user antenna assembly 30.
In an alternative embodiment, the network device further includes at least one interface 80 connected to the daughter board assembly 40 and/or the motherboard assembly 50, the interface 80 being disposed on the second housing 10. When the first casing 10 rotates relative to the second casing 20, the position of the interface 80 relative to the placing surface is not changed, which avoids the bad phenomenon of cable winding on the interface 80 and shortens the service life of the cable.
Illustratively, the interface 80 includes a power interface 82 and an antenna interface 81, the power interface 82 being adapted to be electrically connected to an external power source, and the antenna interface 81 being adapted to be communicatively coupled to the antenna assembly 30. The power interface 82 and/or the antenna interface 81 are disposed on the bottom or the side of the second housing 20, so that when a user adjusts the direction of the antenna assembly 30, the power interface 82 and/or the antenna interface 81 do not rotate therewith, and the appearance of the network device is not affected.
In an alternative embodiment, the network device further includes a cable 70 disposed on the second housing 20, wherein the daughter board assembly 50, the motherboard assembly 40 and the antenna assembly 30 are connected to each other via the cable 70, and a switch button for controlling an operating state of the network device.
Illustratively, the cable 70 includes a power cable 72 and a communication cable 71, the power cable 72 is used for supplying power to the daughter board assembly 50, the motherboard assembly 40 and the antenna assembly 30, and the communication cable 71 is used for inputting or outputting signals between the daughter board assembly 50, the motherboard assembly 40 and the antenna assembly 30 through the cable 70.
In an alternative embodiment, the first housing 10 and/or the second housing 20 are provided with heat dissipation holes for dissipating heat of the daughter board assembly 50 and the main board assembly 40, so as to ensure that the daughter board assembly and the main board assembly can work at a working temperature, and simultaneously, the service lives of the daughter board assembly 50 and the main board assembly 40 are also prolonged.
The daughter board assembly 50 may be configured by a plurality of daughter boards, and the main board assembly 40 may be configured by a plurality of main boards, which is not limited in the present application.
Example two
The network device provided in the second embodiment of the present invention is different from the network device provided in the first embodiment in a manner that the first housing is rotatably connected to the second housing, and specifically, the network device provided in the first embodiment of the present invention is: the first shell is provided with a rotating shaft, the rotating shaft and the central shaft are coaxially arranged, and the first shell is rotatably connected with the second shell through the rotating shaft.
Exemplarily, one end of the rotating shaft is fixed on the first shell, the supporting part of the second shell is provided with a rotating shaft mounting part, the rotating shaft mounting part is provided with a second bearing part, and the rotating shaft penetrates through the second bearing part to realize that the first shell can rotate relative to the second shell, so that a user can drive the antenna assembly to rotate through the rotation of the first shell relative to the second shell, thereby adjusting the direction of the antenna module, realizing the position change of the antenna module and adjusting the signal of the antenna module to an optimal state.
EXAMPLE III
A network device provided in the third embodiment of the present invention is different from the network device provided in the second embodiment in a manner that a first housing is rotatably connected to a second housing, and specifically, the network device is characterized in that: be equipped with the external screw thread in the pivot, be equipped with the internal thread in second casing 20 and pivot complex mounting hole for first casing passes through the external screw thread and is connected with the second casing rotation with the internal screw thread cooperation, so that alright realize the position transform of antenna module through rotating first casing, make antenna module's signal adjustment to optimal condition.
For example, since the first housing and the second housing are connected by a screw thread, when the first housing rotates relative to the second housing, the first housing rotates around a central axis of the first housing or the second housing and moves along an axial direction of the second housing to adjust a direction of the antenna module, and a signal of the antenna module can be adjusted to an optimal state by combining a prompt function of the prompt device.
Example four
A network device provided in the fourth embodiment of the present invention is different from the network device provided in the first embodiment in a manner that a first housing is rotatably connected to a second housing, and specifically, the network device is characterized in that: the inner wall of well kenozooecium is formed with the internal thread, and the lateral wall of second casing is equipped with the external screw thread for first casing passes through the external screw thread and is connected with the second casing rotation with the cooperation of internal thread, so that can realize the position transform of antenna module through rotating first casing, makes antenna module's signal adjustment to optimum.
For example, since the first housing and the second housing are connected by a screw thread, when the first housing rotates relative to the second housing, the first housing rotates around a central axis of the first housing or the second housing and moves along an axial direction of the second housing to adjust a direction of the antenna module, and a signal of the antenna module can be adjusted to an optimal state by combining a prompt function of the prompt device.
EXAMPLE five
A network device provided in the fifth embodiment of the present invention is different from the network device provided in the first embodiment in a manner that a first housing is connected to a second housing, and specifically, the network device is characterized in that: the shell further comprises a sliding assembly, the sliding assembly is arranged between the first shell and the second shell, so that the antenna module can slide when the first shell can slide relative to the second shell, the position of the antenna module can be adjusted, and signals of the antenna module are in the optimal state.
It should be noted that the sliding assembly may be any kind of component, and the sliding assembly may also be a buckle and a chute that are arranged on the first housing and the second housing and are mutually matched, and the purpose of the sliding assembly is mainly to enable the first housing and the second housing to slide relatively, so as to adjust the position of the antenna module, which is not limited in this application.
EXAMPLE six
A network device provided in a sixth embodiment of the present invention is different from the network device provided in the first embodiment in a manner that a first housing is connected to a second housing, and specifically, the network device is characterized in that: other transmission modes can be arranged between the first shell and the second shell, for example, a gear transmission assembly is arranged between the first shell and the second shell, a transmission gear is arranged on the first shell, a transmission rack is arranged on the second shell, and the first shell is in sliding connection with the second shell through the engagement of the transmission gear and the transmission rack.
EXAMPLE seven
As shown in fig. 8, a network device according to a seventh embodiment of the present invention is different from the network device according to the first embodiment in the structure of the housing, and specifically includes: the housing comprises a first housing 10a, a second housing 10b, a third housing 10c and a fourth housing 20, wherein the first housing 10a is rotatably connected with the second housing 10b, the second housing 10b is rotatably connected with the third housing 10c, and the third housing 10c is rotatably connected with the fourth housing 20, or the first housing 10a, the second housing 10b and the third housing 10c are independent from each other and are rotatably connected with the fourth housing 20, so that the rotation of the first housing 10a, the second housing 10b or the third housing 10c can drive the position of the antenna assembly to change, the signal of the antenna module is adjusted to an optimal state, and the position of the fourth housing 20 can be ensured to be unchanged.
It should be noted that the number of the shells can be designed according to actual needs, and the application is not limited.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.
Claims (12)
1. A network device, comprising
An antenna assembly;
the antenna assembly comprises a shell and a plurality of antenna elements, wherein the shell comprises a first shell and a second shell capable of rotating or sliding relative to the first shell, a mainboard assembly is arranged on the first shell and electrically connected with the antenna assembly, and a daughter board assembly is arranged on the second shell and electrically connected with the mainboard assembly;
the network equipment further comprises a prompting device connected with the antenna assembly, the antenna assembly is arranged on the first shell, the prompting device is arranged on the second shell, so that the antenna assembly can move when the first shell rotates or slides relative to the second shell, and the prompting device is used for indicating the strength of a signal transmitted and received by the antenna assembly.
2. The network device of claim 1, wherein the antenna assembly comprises an antenna module and a support frame, a hollow portion is provided on the first housing, and the antenna module is disposed in the hollow portion through the support frame; and/or the first shell is of a sleeve structure, and the second shell is positioned below the first shell and coaxially sleeved with the first shell.
3. The network device according to claim 2, wherein the hollow portion rotates around a central axis of the first housing or the second housing, and a part of the second housing is accommodated in the hollow portion so that the first housing can rotate relative to the second housing.
4. The network device of claim 3, wherein the housing further comprises a first bearing disposed outside the second housing, the first housing being connected to the second housing via the first bearing.
5. The network device according to claim 3, wherein the first housing is provided with a rotating shaft, the rotating shaft is coaxial with the central shaft, and the first housing is rotatably connected to the second housing through the rotating shaft.
6. The network device according to claim 3, wherein an inner wall of the hollow portion is formed with an internal thread, an outer side wall of the second housing is provided with an external thread, and the first housing is rotatably connected with the second housing by the matching of the external thread and the internal thread.
7. The network device of claim 1, wherein the housing further comprises a sliding assembly disposed between the first housing and the second housing such that the first housing is slidable relative to the second housing.
8. The network device of any one of claims 1-7, wherein the prompting device comprises a light source connected to the antenna assembly, the light source displaying light of a different color or brightness depending on the intensity of signals received by the antenna assembly when the first housing is moved relative to the second housing.
9. The network device according to claim 8, wherein the notification device further comprises a light guide disposed on the second housing, and the light source is disposed toward the light guide for guiding the light emitted from the light source to exit the second housing.
10. The network device of any one of claims 1-7, further comprising at least one interface to connect with the daughter board assembly and/or the motherboard assembly, the interface disposed on the second housing.
11. The network device of claim 10, wherein the interface comprises a power interface for connection to an external power source and an antenna interface for communicative connection to the antenna assembly, the power interface and/or antenna interface being disposed on a bottom or side of the second housing.
12. The network device of any one of claims 1-7, further comprising a cable disposed on the second housing, the daughter board assembly, the motherboard assembly, and the antenna assembly being interconnected by the cable; and/or a switch button is arranged on the second shell and used for controlling the working state of the network equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010615355.7A CN113873346A (en) | 2020-06-30 | 2020-06-30 | Network device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010615355.7A CN113873346A (en) | 2020-06-30 | 2020-06-30 | Network device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113873346A true CN113873346A (en) | 2021-12-31 |
Family
ID=78981374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010615355.7A Pending CN113873346A (en) | 2020-06-30 | 2020-06-30 | Network device |
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| Country | Link |
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| CN (1) | CN113873346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114513754A (en) * | 2022-01-29 | 2022-05-17 | 叶尔森·沙吾列别克 | Vehicle positioning system |
-
2020
- 2020-06-30 CN CN202010615355.7A patent/CN113873346A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114513754A (en) * | 2022-01-29 | 2022-05-17 | 叶尔森·沙吾列别克 | Vehicle positioning system |
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