CN115580315A - Wearable flexible radio station and use method - Google Patents
Wearable flexible radio station and use method Download PDFInfo
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- CN115580315A CN115580315A CN202211563278.0A CN202211563278A CN115580315A CN 115580315 A CN115580315 A CN 115580315A CN 202211563278 A CN202211563278 A CN 202211563278A CN 115580315 A CN115580315 A CN 115580315A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3888—Arrangements for carrying or protecting transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a wearable flexible radio station and a using method, wherein a unit module is respectively arranged in a plurality of functional module boxes, each unit module is respectively connected with four pairs of standard interfaces I in the respective functional module box, a piece of clothing is arranged outside each functional module box, and the plurality of clothing are tied together through a waistband; the plurality of functional module boxes are arranged at intervals, and two adjacent functional module boxes are connected through a quick-release connecting assembly respectively to form a flexible radio station with an annular structure. The wearable flexible radio station is converted from a traditional backpack radio station, and has good robustness, maintainability and portability; the radio station is wound around the waist through the waistband and can be hung in front of the chest, so that the radio station is convenient to carry and use in the military.
Description
Technical Field
The invention relates to a wearable flexible radio station and a using method thereof, belonging to the field of communication equipment.
Background
The reliability and flexible networking capabilities of the stations have a significant impact on modern communications. The traditional radio station morphological structure is fixed and unchangeable, is influenced by the installation space position, and is different according to the installation position and needs to be replaced by different use scenes. The great portable radio station of power is mostly the backpack at present, is unfavorable for the user to advance fast, and radio station functional component can not replace at any time, and a radio station can only be used for certain or a small amount of several kinds of specific network deployment modes. And once the radio station is damaged, the radio station can only be returned to the factory for repair, so that the use is influenced. Limited space of the radio station, limited quantity of batteries, limited cruising ability and inapplicability to the use requirement of special environment. And the unit modules arranged inside the radio station shell are distributed and concentrated, so that heat dissipation is not facilitated. Crosstalk is easily formed between channels in a radio station, and a communication effect is affected. Most of the materials are customized according to the requirements of users, and the flexible manufacturing is not facilitated due to small-batch production.
Chinese patent application 201721883569.2, a modular radio station, realizes the combination of multiple optional modules through standard interface, its weak point is: 1. the modular radio station has the structural form that all the functional modules are uniformly arranged in the host casing, the modular radio station is limited by the combined fixed structure, the number of the modules capable of being combined is limited, the function expansibility is limited, the universality is poor, and the host casing is required to be disassembled and assembled when the functional modules are replaced, so that the modular radio station wastes time and labor and is not suitable for the use requirements of special environments. This modularization radio station rack part is fixed structure form, and when the user received the impact in bearing the radio station motion, this kind of structure form's radio station can't cushion the impact of external force, damages easily, and the module concentrates relatively, and when taking place to damage, great probably damages a plurality of modules simultaneously. The structure of this modularization radio station, inside module arrange concentrate, are unfavorable for the heat dissipation, form easily between each channel in this modularization radio station and crosstalk, make communication effect receive the influence. 2. The functions and application scenes of the modularized radio station are fixed, and different functional modules cannot be quickly combined, disassembled and assembled according to actual use scenes; this modularization radio station can't increase and decrease battery quantity in a flexible way according to the duration demand when in actual use. 3. This modularization radio station is not convenient for single and carries, is unfavorable for using in advancing fast.
Disclosure of Invention
In view of the defects that the networking mode in the prior art is fixed, cannot be flexibly replaced according to actual application scenes, has poor maintainability, has the cruising ability limited by the size of a battery, easily forms crosstalk among channels, is not beneficial to heat dissipation, is not beneficial to realizing flexible manufacturing, is not convenient to carry by a single person and the like, the invention provides a wearable flexible radio station and a using method thereof, the invention respectively arranges unit modules with different functions in a plurality of functional module box cavities, can flexibly select the unit modules with different functions according to different networking requirements, and enhances the tactical networking ability; different unit modules are distributed in a dispersed mode, and compared with an integrated communication radio station, the heat dissipation area is increased by 2-3 times; the unit modules are independent from each other, and signal crosstalk is avoided. The invention can be wound around the waist or hung in front of the chest, and is convenient to carry and use during walking.
The technical scheme adopted by the invention is as follows: a wearable flexible radio station comprises a functional module box, a quick-release connecting assembly, a machine clothing, a waistband and a unit module; the functional module boxes are internally provided with unit modules respectively, each functional module box is externally provided with a piece of clothing, the functional module boxes are connected through quick-release connecting components respectively, and the clothing is tied together through a waistband to form a flexible radio station with an annular structure, so that signal interaction is realized; the upper end surface and the lower end surface of the two sides of the outside of the functional module box are respectively provided with a pair of standard interfaces I and a hanging rod, the two side ends of each pair of standard interfaces I are respectively provided with a concave spigot, and the unit modules in the functional module box are respectively connected with four pairs of standard interfaces I; the quick-release type connecting assembly consists of four connecting devices, four cables and a flexible sheath, wherein two cables form a group, two ends of each group of two cables are respectively connected with one connecting device, and the flexible sheath is sleeved outside the two groups of four cables; the unit module comprises an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a man-machine interaction unit and a battery unit.
A use method of a wearable flexible radio station comprises the following steps:
step 1, respectively installing an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a man-machine interaction unit and a battery unit in a plurality of functional module boxes, respectively connecting each unit module with four pairs of standard interfaces I in the respective functional module box, and coating a piece of machine clothing outside each functional module box;
and 3, when the belt is worn, the belt is separated from the belt buckle, two connecting devices of one quick-release connecting assembly are separated from the functional module box to surround the waist or the chest of a user, the belt is tied together, and the two connecting devices are locked on the functional module box to surround the waist or the chest of the user.
The invention has the following beneficial effects: 1. the invention is applied to the radio station, the traditional backpack radio station is changed into the wearable flexible radio station, the flexible radio station components are flexibly connected, and the flexible radio station can absorb large external force impact through deformation and avoid damaging the components when being impacted by the external force. The radio station has flexibility and elasticity when in use, can realize flexible conversion of the functions of the radio station, can increase or reduce unit modules with different functions according to use requirements, has stronger adaptability of the radio station to the use environment, and has good robustness, maintainability and portability; the functional module box can flexibly select unit modules with different functions according to different networking requirements, so that quick replacement is realized, and networking capability is enhanced. 2. When the radio station is damaged, the radio station can be repaired only by replacing the functional module box with the corresponding function or the damaged unit module in the functional module box, so that the robustness is stronger; particularly, in a specific use environment, the replacement of the functional module box with the corresponding function can be completed within 1 minute. 3. The flexible radio station has good wearability, can wear next to the shin according to user's body shape, more does benefit to and uses in the motion. The radio station is wound on the waist through the waistband, and can be hung in front of the chest, so that the radio station is convenient to carry and use in advancing, and the waistband can ensure that the connecting component of the flexible radio station is reliably connected. 4. The number of the batteries can be flexibly increased or decreased according to the requirement, and the cruising ability is enhanced. 5. Different functional unit dispersions are arranged, compare in integral type communication radio station, and heat radiating area increases 2 to 3 times. 6. The unit modules are arranged at intervals, and each unit module is independently packaged, so that signal crosstalk is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a wearable flexible radio station according to the present invention;
FIG. 2 is a schematic view of the connection between the functional module box and the quick release connecting assembly according to the present invention;
FIG. 3 is a rear view of the garment of the present invention;
FIG. 4 is a schematic structural view of the open state of the garment flap of the present invention;
FIG. 5 is a schematic diagram of the structure of the garment with the functional module box of the human-computer interaction unit installed thereon according to the present invention;
FIG. 6 is a schematic view of the structure of the functional cartridge of the present invention;
FIG. 7 is a rear view of the functional module cartridge with the human-computer interaction unit installed in accordance with the present invention;
FIG. 8 is a schematic structural view of a quick release type connecting assembly according to the present invention;
FIG. 9 is a schematic view of the structure of the latch I of the present invention;
FIG. 10 is a cross-sectional view of FIG. 9;
fig. 11 is a schematic connection diagram of the unit modules according to the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, a wearable flexible radio station includes a functional module box 1, a quick-release connection assembly 2, a garment 3, a belt 4 and a unit module; the inner cavities of the functional module boxes 1 are respectively provided with unit modules with different functions, the functional module boxes 1 are respectively coated with a piece of clothing 3, the functional module boxes 1 are connected in series through the quick-detachable connecting components 2, and the clothing 3 are connected together through the belt 4 to form a flexible radio station with an annular structure.
As shown in figures 3 and 4, two clothing loops 3-1 are arranged at the back of the machine clothing 3, a flip 3-2 which can be opened and closed is arranged at the upper end of the machine clothing 3, a lock catch II 3-3 is arranged on the flip 3-2, and a lock nut 3-4 is arranged on the machine clothing body.
FIG. 5 is a schematic diagram of the structure of the garment with the functional module box equipped with the human-computer interaction unit, wherein strip-shaped fixing bands 3-5 are arranged on two sides of the upper end of the garment 3, a hollow opening 3-6 is arranged between the two strip-shaped fixing bands 3-5, and the two strip-shaped fixing bands 3-5 are fixed on the garment body through the matching of a lock catch II 3-3 and a lock nut.
The machine clothing 3 is used for fixing the functional module box 1, and the waistband 4 is used for fixing the machine clothing 3 to be immovable, so that the quick-release type connecting component 2 is reliably connected, and the reliability of communication is ensured.
As shown in FIG. 6, a pair of standard interfaces I1-1 are respectively arranged on the upper and lower surfaces of rectangular ends on two sides of the outside of the functional module box 1, concave rabbets 1-4 are respectively arranged on two side ends of each pair of standard interfaces I1-1, a hanging rod 1-2 is respectively arranged on an inclined plane between each pair of standard interfaces I1-1 and the upper and lower surfaces of the functional module box 1, and a box cover 1-3 is arranged on the side surface of the functional module box 1.
Fig. 7 is a rear view of the functional module case equipped with the man-machine interaction unit, provided with the liquid crystal display 1-5, the operation keys 1-6 and the handset interface 1-7.
As shown in fig. 8, 9 and 10, the quick-release connecting assembly 2 is composed of four connecting devices 2-1, four cables 2-2 and a flexible sheath 2-3, the two cables 2-2 form a group, two ends of each group of two cables 2-2 are respectively connected with one connecting device 2-1, and the flexible sheath 2-3 is sleeved outside the two groups of four cables 2-2. The flexible sheath 2-3 is used for protecting the cable 2-2 from abrasion and enhancing the comfort of a user, and the length of the cable 2-2 can be customized to various lengths according to the requirements of the user.
The connecting device 2-1 consists of an interface box 2-1-1 and a lock catch I2-1-2, the lock catch I2-1-2 is fixed on the upper end face of the interface box 2-1-1, and a carrying handle 2-1-21 and a hook 2-1-22 are arranged on the lock catch I2-1-2; the lower end face of the interface box 2-1-1 is provided with a pair of standard interfaces II 2-1-11, two sides of each pair of standard interfaces II 2-1-11 are respectively provided with a convex spigot 2-1-12, and each pair of standard interfaces II 2-1-11 is connected with two cables 2-2.
The quick-release type connecting assembly 2 is used for realizing quick installation with the functional module box 1, and the quick-release type connecting assembly 2 realizes reliable positioning of the quick-release type connecting assembly 2 and the functional module box 1 through matching of the convex seam allowances 2-1-12 on two sides and the concave seam allowances 1-4 on two sides of the functional module box 1.
As shown in fig. 11, the unit module includes an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a human-computer interaction unit, and a battery unit; the power amplification unit consists of a power amplification circuit, a power control circuit and an antenna filter circuit; the power amplification circuit is used for transmitting frequency signal power amplification; the power control circuit is used for adjusting the gain of the power amplifier to ensure that the output power of the whole machine is within a required range; the antenna filter circuit is used for filtering radio frequency signals.
The channel unit consists of a frequency synthesis circuit, an intermediate frequency processing circuit and a radio frequency front end processing circuit;
the frequency synthesis circuit is used for signal frequency conversion of a superheterodyne scheme; the intermediate frequency processing circuit is used for amplifying and filtering intermediate frequency signals; the radio frequency front-end processing circuit is used for switching paths and amplifying and filtering received signals.
The digital processing unit consists of a radio frequency control circuit, a system control circuit, a power supply protection circuit, a power supply filter circuit, a network protocol processing circuit and a human-computer interface; the radio frequency control circuit is used for controlling a radio frequency signal access and a DDS; the system control circuit is used for controlling the working mode of the whole machine; the power supply protection circuit is used for protecting the power supply to stop outputting when overshooting and short-circuiting so as to avoid circuit burnout; the power supply filter circuit is used for filtering direct-current power supply ripples and clutter; the network protocol processing circuit is used for interactive processing of the internet port data protocol; the human-computer interface is used for human-computer interaction.
The man-machine interaction unit is used for a user to perform keyboard key operation and check the liquid crystal display screen, the external interface is used for being interconnected with other hardware equipment, the debugging interface is used for debugging the radio station, the transmitter and receiver interface is used for being connected with a transmitter and receiver, and the radio frequency cable interface is used for being externally connected with an antenna.
Embodiment 1, a method for using a wearable flexible radio station, includes the following steps:
step 1, before use, opening the box covers 1-3 of 6 functional module boxes 1, respectively installing an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a man-machine interaction unit and a battery unit, respectively connecting each functional unit with four pairs of standard interfaces I1-1 in the respective functional module box 1, and then fixing the respective box covers 1-3 on the respective functional module boxes 1; the method comprises the steps that a piece of clothing 3 is respectively coated outside a functional module box 1 provided with an antenna unit, a power amplifier unit, a channel unit, a digital processing unit and a battery unit, the clothing 3 is coated outside the functional module box 1 through matching of a flip 3-2 lock catch II 3-3 and a lock nut 3-4 of a clothing body, the functional module box 1 provided with a human-computer interaction unit is placed in the clothing 3 arranged for the functional module box, the functional module box 1 is fixed in the clothing 3 through matching of two strip-shaped fixing bands 3-5 through the lock catch II 3-3 and the lock nut, and a hollow-out hole 3-6 is used for exposing a liquid crystal display 1-5, an operation key 1-6 and a transmitter-receiver interface 1-7 of the human-computer interaction unit.
Step 2, a belt 4 penetrates through two belt loops 3-1 of each machine clothing 3 respectively, 6 functional module boxes 1 are arranged on the belt 4 at intervals, a quick-release connecting assembly 2 is arranged between every two adjacent functional module boxes 1 respectively, four connecting devices 2-1 of each quick-release connecting assembly 2 are matched and inserted with concave spigot 1-4 on one corresponding side of each two adjacent functional module boxes 1 through convex spigot 2-1-12 respectively, the quick-release connecting assembly 2 is positioned on the functional module boxes 1, the hooks 2-1-22 are driven by lifting handles 2-1-21 to move forwards to hook the hanging rods 1-2 on the functional module boxes 1, the handles 2-1-21 are pressed downwards, the hooks 2-1-22 are locked through three spring compression forces in the buckles I2-1-2, the connecting devices 2-1 of each quick-release connecting assembly 2 are locked on the functional module boxes 1, four pairs of standard interfaces II 2-1 of the four connecting devices 2-1 are connected with the adjacent functional module boxes 1-11 of the four functional module boxes respectively through four pairs of standard interfaces 1-1, and the quick-1 are connected together through a plurality of quick-release connecting assemblies, and the quick-release connecting assemblies 2 are connected with the adjacent functional module boxes 1 through a plurality of the quick-1 ring-1.
And 3, when the mobile phone is worn, the waistband 4 is separated from the belt buckle, the carrying handles 2-1-21 of the two connecting devices 2-1 of the quick-release connecting assembly 2 are lifted, the two hooks 2-1-22 are separated from the two hanging rods 1-2 of the functional module box 1, the two connecting devices 2-1 are separated from the two functional module boxes 1, the flexible radio station is wound around the waist or the chest of a user, the waistband 4 is tied together through the belt buckle, the quick-release connecting assembly 2 is locked with the functional module box 1 according to the method in the step 2, and the mobile phone is connected with the handset interface 1-7.
If the cruising ability needs to be enhanced, a plurality of functional module boxes 1 provided with battery units can be connected in series; if the communication frequency band needs to be increased or changed, the functional module box 1 provided with the channel unit is increased or replaced according to the networking requirement; if a satellite communication module is required to be added, a functional module box 1 provided with a Beidou module unit, a functional module box 1 provided with a skyway module unit and the like can be added according to requirements; if the external interface needs to be changed, the functional module box 1 provided with the human-computer interaction unit can be changed according to the requirement.
If a single functional module cartridge 1 is damaged, the functional module cartridge 1 of the corresponding function can be replaced. The unit modules with different functions and the number of the unit modules are selected according to networking requirements, and the interconnection of signals and the connection of physical structures are realized by the quick-release connecting components 2 on different functional module boxes 1.
The flip 3-2 of the machine clothing 3 can be connected with the machine clothing body by a magic tape and the flip 3-2 can be stuck together with the machine clothing body and coated outside the functional module box 1.
Claims (3)
1. A wearable flexible radio station, characterized in that: comprises a functional module box (1), a quick-release type connecting component (2), a piece of machine clothing (3), a waistband (4) and a unit module;
the functional module boxes (1) are internally provided with unit modules respectively, a piece of machine clothing (3) is arranged outside each functional module box (1), the functional module boxes (1) are connected through quick-release connecting components (2), and the machine clothing (3) are tied together through a waistband (4) to form a flexible radio station with an annular structure, so that signal interaction is realized;
the upper end face and the lower end face of two external sides of the functional module box (1) are respectively provided with a pair of standard interfaces I (1-1) and a hanging rod (1-2), two side ends of each pair of standard interfaces I (1-1) are respectively provided with a concave spigot (1-4), and unit modules in the functional module box (1) are respectively connected with four pairs of standard interfaces I (1-1);
the quick-release type connecting assembly (2) consists of four connecting devices (2-1), four cables (2-2) and a flexible sheath (2-3), the two cables (2-2) form a group, two ends of each group of two cables (2-2) are respectively connected with one connecting device (2-1), and the flexible sheath (2-3) is sleeved outside the two groups of four cables (2-2);
the unit module comprises an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a man-machine interaction unit and a battery unit.
2. A wearable flexible station according to claim 1, wherein: the connecting device (2-1) is composed of an interface box (2-1-1) and a lock catch I (2-1-2), the lock catch I (2-1-2) is arranged on the upper end face of the interface box (2-1-1), a pair of standard interfaces II (2-1-11) is arranged on the lower end face of the interface box (2-1-1), convex spigot openings (2-1-12) are respectively arranged on two sides of each pair of standard interfaces II (2-1-11), and each pair of standard interfaces II (2-1-11) is connected with two cables (2-2).
3. A method for using a wearable flexible radio station according to claim 2, the method comprising the following steps:
step 1, respectively installing an antenna unit, a power amplifier unit, a channel unit, a digital processing unit, a man-machine interaction unit and a battery unit in a plurality of functional module boxes (1), wherein each unit module is respectively connected with four pairs of standard interfaces I (1-1) in the respective functional module box (1), and a piece of clothing (3) is coated outside each functional module box (1);
step 2, a waistband (4) penetrates through a waistband (3-1) of each piece of clothing (3), a plurality of functional module boxes (1) are arranged on the waistband (4) at intervals through the clothing (3), a quick-release connecting assembly (2) is arranged between every two adjacent functional module boxes (1), four connecting devices (2-1) of each quick-release connecting assembly (2) are matched and plugged with concave spigot (1-4) on one corresponding side of each two adjacent functional module boxes (1) through convex spigot (2-1-12), each connecting device (2-1) is matched and locked on the functional module boxes (1) through hooks (2-1-22) and hanging rods (1-2) of the functional module boxes (1), four pairs of standard interfaces II (2-1-11) of the four connecting devices (2-1) are in butt joint with four pairs of standard interfaces (1-1) of the two adjacent functional module boxes (1), the waistband (4) is tied together through an annular buckle to form a flexible radio station;
and 3, when the belt is worn, the belt (4) is separated from the belt buckle, two connecting devices (2-1) of one quick-release connecting assembly (2) are separated from the functional module box (1), the belt (4) is tied together around the waist or the chest of a user, and the two connecting devices (2-1) are locked on the functional module box (1) and worn around the waist or the chest of the user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211563278.0A CN115580315B (en) | 2022-12-07 | 2022-12-07 | Use method of wearable flexible radio station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211563278.0A CN115580315B (en) | 2022-12-07 | 2022-12-07 | Use method of wearable flexible radio station |
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| CN115580315A true CN115580315A (en) | 2023-01-06 |
| CN115580315B CN115580315B (en) | 2023-03-21 |
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| US20200020165A1 (en) * | 2018-07-12 | 2020-01-16 | Bao Tran | Smart device |
| CN113630137A (en) * | 2021-07-19 | 2021-11-09 | 北京电子工程总体研究所 | Ultra-short wave radio station broadband radio station integrated equipment and system |
| CN114421121A (en) * | 2022-03-30 | 2022-04-29 | 陕西海积信息科技有限公司 | Wearable antenna |
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2022
- 2022-12-07 CN CN202211563278.0A patent/CN115580315B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070279852A1 (en) * | 2004-02-27 | 2007-12-06 | Daniel Simon R | Wearable Modular Interface Strap |
| CN205139779U (en) * | 2015-11-06 | 2016-04-06 | 研祥智能科技股份有限公司 | Wearable computer |
| CN207744830U (en) * | 2017-12-28 | 2018-08-21 | 武汉中电通信有限责任公司 | A kind of Back frame of transmitter-receiver |
| US20200020165A1 (en) * | 2018-07-12 | 2020-01-16 | Bao Tran | Smart device |
| CN109639292A (en) * | 2019-01-03 | 2019-04-16 | 西安航天天绘数据技术有限公司 | A kind of wireless self-networking communication station based on high-speed data processing FPGA architecture |
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| CN114421121A (en) * | 2022-03-30 | 2022-04-29 | 陕西海积信息科技有限公司 | Wearable antenna |
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| CN115580315B (en) | 2023-03-21 |
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