CN115207902A - Load control device for regulating and controlling power network in real time - Google Patents
Load control device for regulating and controlling power network in real time Download PDFInfo
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- CN115207902A CN115207902A CN202210701554.9A CN202210701554A CN115207902A CN 115207902 A CN115207902 A CN 115207902A CN 202210701554 A CN202210701554 A CN 202210701554A CN 115207902 A CN115207902 A CN 115207902A
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- 230000001276 controlling effect Effects 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 15
- 230000003993 interaction Effects 0.000 claims abstract description 10
- 230000017525 heat dissipation Effects 0.000 claims description 18
- 239000013642 negative control Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000003139 buffering effect Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/54—Anti-seismic devices or installations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to a load control device for regulating and controlling a power network in real time, which comprises a main controller body, a first buffer plate, a second buffer plate, a U-shaped fixing frame, a main CPU module, an ammeter module, a power line modem, a signal processing unit, a control signal output unit, a man-machine interaction interface, a control output interface, a display unit, a communication interface and a communication module, wherein the output end of the main CPU module is connected to the control signal output unit, the main controller body is arranged in the U-shaped fixing frame, and a first groove is formed in one side inside the U-shaped fixing frame. Has the advantages that: ammeter module and power line modem are to the load monitoring on the power network, and the buffering is realized to first movable block, first spring, articulated elements and the hinge bar of first buffer board in first recess, and T type screw rod cooperation telescopic link is fixed to the main control unit body buffering to second spring and the second buffer board in the backup pad, and radiator fan dispels the heat to the main control unit body, and simple structure is stable, and the practicality is strong.
Description
Technical Field
The invention relates to the technical field of power network load control, in particular to a load control device for regulating and controlling a power network in real time.
Background
One of the major characteristics of electricity production is that the generated power must be dynamically balanced with the used power. There are thousands of power utilities in a city, and the management and control of the power load of these users is constantly advancing with the development of technology. At present, conditions and methods for remotely controlling users are provided, and the balance between the generated power and the load power can be realized. The system is called as a power load management system, and according to the actual situation of a power system and according to different power utilization rules of various users, the power utilization time is reasonably arranged, the high peaks of the system are dispersed, so that the load of a part of the high peak time is transferred to the low valley time for use, and the purpose of peak clipping and valley filling is achieved, and the balance among power generation, power supply and power utilization is obtained. Load adjustment is one content of planned power utilization, the potentials of power generation, power supply and power utilization equipment can be fully exerted by adjusting the load, the power construction investment is saved, the power utilization requirement of national economic development is met to the maximum extent, through years of development, the power load management realizes the proportional rotation control of the load of a user, and the power grid balance can be maintained through the load control of the user basically and quickly when the supply and demand of the power grid are in shortage and faults.
The power load demand control and regulation unit is arranged in a box body, and because the power load demand control and regulation unit is internally provided with more circuit components and devices, the heat dissipation capability is poor, the protection capability on the regulation unit is poor, in addition, the existing power load control and regulation unit cannot realize real-time monitoring on a power network, so that the performance is poor, and a load control device for regulating and controlling the power network in real time is provided aiming at the phenomena.
Disclosure of Invention
The present invention provides a load control device for real-time controlling a power network, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a load control device for regulating and controlling a power network in real time comprises a main controller body, a first buffer plate, a second buffer plate, a U-shaped fixing frame, a main CPU module, an ammeter module, a power line modem, a signal processing unit, a control signal output unit, a man-machine interaction interface, a control output interface, a display unit, a communication interface and a communication module, wherein the main CPU module is arranged in the main controller body, the output end of the ammeter module is connected to the input end of the power line modem, the output end of the power line modem is connected to the signal processing unit through an address setter and a current detector, the output end of the signal processing unit is connected to the main CPU module, the output end of the main CPU module is connected to the control signal output unit, and the main controller body is arranged in the U-shaped fixing frame, first recess has been seted up to inside one side of U type mount, lie in the U type mount both ends sliding connection has first movable block in the first recess, be connected with first buffer board between the first movable block, the second recess has been seted up to the inside opposite side of U type mount, lie in the U type mount it has T type screw rod to hold out screw thread through connection in the first recess, just there is the backup pad at the top of T type screw rod through roating seat swing joint, the opposite side of backup pad is connected with the second buffer board, heat dissipation recess has been seted up at inside one side both ends of U type mount, just lie in on the U type mount bottom department has radiator fan through bolt fixed mounting in the heat dissipation recess, first buffer board with swing joint has between the second buffer board main control unit body.
Furthermore, the input end of the main CPU module is connected with a security interface, and the output end of the control signal output unit is connected with an alarm.
Furthermore, the output end of the control signal output unit is connected with the human-computer interaction interface, the control output interface, the display unit, the communication interface and the communication module.
Furthermore, be located between the first movable block there is first spring through bolt fixed mounting in the first recess, the first movable block with there is the hinge bar through articulated elements swing joint between the first buffer board.
Furthermore, one side of the supporting plate is fixedly provided with a plurality of second springs through bolts, and one ends of the tops of the second springs are fixedly provided with the second buffer plates through bolts.
Furthermore, one side of the supporting plate is located at two ends of the T-shaped screw rod, and telescopic rods located in the second grooves are fixedly installed on the two ends of the T-shaped screw rod through bolts.
Furthermore, a filter screen is fixedly installed on one side, outside of the heat dissipation groove, of the U-shaped fixing frame through bolts, and a protective pad made of rubber is fixedly bonded on one side, outside of the heat dissipation groove, of the U-shaped fixing frame.
Furthermore, the first buffer plate and the second buffer plate are made of rubber materials, and one side of the interior of the main controller body is abutted to the protective pad.
Compared with the prior art, the invention has the following beneficial effects: the load on the power network is monitored through the ammeter module and the power line modem, data in monitoring are located and analyzed through the address setter and the current detector, data are transmitted to the signal processing unit to be processed, the signals are decomposed and instructions are made through the main CPU module after processing, the man-machine interaction interface, the control output interface, the display unit, the communication interface and the communication module transmit data to the main controller body, the main controller body performs data transmission on the main controller body through the first movable block of the first buffer plate in the first groove in the installation process, the first spring, the buffer is achieved through the hinged joint rod and the hinged joint rod, the second spring and the second buffer plate on the supporting plate are fixedly buffered through the T-shaped screw rod matched with the telescopic joint rod, the internal units are protected, the service life is prolonged, heat dissipation is achieved on the main controller body through the cooling fan, the structure is simple and stable, the performance is stable, and the practicability is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a negative control device for real-time regulation of a power network, according to the present invention;
FIG. 2 is a schematic installation diagram of a load control device for real-time regulation of an electrical power network in accordance with the present invention;
reference numerals:
1. a main controller body; 2. a first buffer plate; 21. a first groove; 22. a first movable block; 23. a first spring; 24. an articulation member; 25. a hinged lever; 3. a second buffer plate; 31. a second groove; 32. a T-shaped screw; 33. a rotating base; 34. a support plate; 35. a second spring; 36. a telescopic rod; 4. a U-shaped fixing frame; 41. a heat dissipation groove; 42. a heat radiation fan; 43. a filter screen; 44. a protective pad; 5. a main CPU module; 51. 6, an ammeter module; 7. a power line modem; 8. a signal processing unit; 9. a control signal output unit; 91. a human-computer interaction interface; 92. a control output interface; 93. a display unit; 94. a communication interface; 95 a communication module; 96. an alarm.
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 only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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 thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-2, a load control device for real-time regulation and control of a power network according to the present invention includes a main controller body 1, a first buffer board 2, a second buffer board 3, a U-shaped fixing frame 4, a main CPU module 5, an electricity meter module 6, a power line modem 7, a signal processing unit 8, a control signal output unit 9, a man-machine interaction interface 91, a control output interface 92, a display unit 93, a communication interface 94 and a communication module 95, the main CPU module 5 is disposed inside the main controller body 1, an output end of the electricity meter module 6 is connected to an input end of the power line modem 7, an output end of the power line modem 7 is connected to the signal processing unit 8 through an address setter 71 and a current detector 72, an output end of the main CPU module 8 is connected to the main CPU module 5, an output end of the main CPU module 5 is connected to the control signal output unit 9, the main controller body 1 is disposed in the U-shaped fixing frame 4, a first groove 21 is arranged on one side inside the U-shaped fixing frame 4, two ends of the U-shaped fixing frame 4 positioned in the first groove 21 are connected with first movable blocks 22 in a sliding way, a first buffer plate 2 is connected between the first movable blocks 22, a second groove 31 is arranged on the other side inside the U-shaped fixing frame 4, a T-shaped screw 32 is connected in the U-shaped fixing frame 4 at the middle end of the second groove 31 in a penetrating way, the top of the T-shaped screw 32 is movably connected with a supporting plate 34 through a rotating seat 33, the other side of the supporting plate 34 is connected with a second buffer plate 3, two ends of one side inside the U-shaped fixing frame 4 are provided with heat dissipation grooves 41, and a heat radiation fan 42 is fixedly installed at the bottom of the heat radiation groove 41 on the U-shaped fixing frame 4 through bolts, and a main controller body 1 is movably connected between the first buffer plate 2 and the second buffer plate 3.
The input end of the main CPU module 5 is connected to the security interface 51, and the output end of the control signal output unit 9 is connected to the alarm 96, so as to realize alarm.
The output end of the control signal output unit 9 is connected to a human-computer interaction interface 91, a control output interface 92, a display unit 93, a communication interface 94 and a communication module 95, so as to realize data transmission.
Wherein, be located between the first movable block 22 and have first spring 23 through bolt fixed mounting in first recess 21 is inside, have hinge bar 25 through articulated elements 24 swing joint between first movable block 22 and the first buffer board 2, realize that one side buffering to main control unit body 1 is fixed, stable in structure.
Wherein, there are a plurality of second spring 35 one side of backup pad 34 through bolt fixed mounting, and there is second buffer plate 3 top one end of second spring 35 through bolt fixed mounting, realizes fixed the opposite side buffering of main control unit body 1.
Wherein, the telescopic rod 36 located in the second groove 31 is fixedly installed at two ends of the T-shaped screw 32 on one side of the supporting plate 34 through bolts, so as to realize the rotating process.
Wherein, a filter screen 43 is fixedly arranged on one side of the U-shaped fixing frame 4, which is positioned outside the heat dissipation groove 41, through bolts, and a rubber protective pad 44 is fixedly bonded on one side of the U-shaped fixing frame 4, which is positioned outside the heat dissipation groove 41, so as to realize the heat dissipation of the main controller body 1.
Wherein, first buffer board 2 and second buffer board 3 are the rubber material and make, and offset between inside one side of main control unit body 1 and the protection pad 44, realize fixed to main control unit body 1's protection.
Principle of operation
Through the scheme, the load on the power network is monitored through the ammeter module and the power line modem when the load control device for regulating and controlling the power network in real time is used, the monitored data is positioned and analyzed through the address setter and the current detector, the data is transmitted to the signal processing unit for processing, the signals are decomposed through the main CPU module after the processing, and an instruction is made, the main controller body is subjected to data transmission through the man-machine interaction interface, the control output interface, the display unit, the communication interface and the communication module, the main controller body is buffered through the first movable block of the first buffer plate in the first groove, the first spring, the hinge piece and the hinge rod in the installation process, the second spring on the support plate and the second buffer plate are buffered and fixed through the T-shaped screw rod in a matched mode, the internal unit is protected, the service life is prolonged, the heat dissipation is realized through the heat dissipation fan, the structure is simple and stable, and the practicability is strong.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The load control device comprises a main controller body (1), a first buffer plate (2), a second buffer plate (3), a U-shaped fixing frame (4), a main CPU module (5), an ammeter module (6), a power line modem (7), a signal processing unit (8), a control signal output unit (9), a human-computer interaction interface (91), a control output interface (92), a display unit (93), a communication interface (94) and a communication module (95), and is characterized in that the main controller body (1) is internally provided with the main CPU module (5), the output end of the ammeter module (6) is connected to the input end of the power line modem (7), the output end of the power line modem (7) is connected to the signal processing unit (8) through an address setter (71) and a current detector (72), the output end of the signal processing unit (8) is connected to the main CPU module (5), the output end of the main CPU module (5) is connected to the control signal output unit (9), the main controller body (1) is arranged in the U-shaped fixing frame (4), a first groove (21) is arranged at one side of the U-shaped fixing frame (4), and a first groove (21) is arranged in the U-shaped fixing frame (21) 22 The utility model discloses a heat dissipation device of a motor vehicle, including U type mount (32), first movable block (22), second recess (31) have been seted up to the inside opposite side of U type mount (4), lie in U type mount (4) the screw thread through connection has T type screw rod (32) to hold in second recess (31), just there is backup pad (34) at the top of T type screw rod (32) through roating seat (33) swing joint, the opposite side of backup pad (34) is connected with second buffer board (3), heat dissipation recess (41) have been seted up at inside one side both ends of U type mount (4), just lie in on U type mount (4) bottom department has radiator fan (42) through bolt fixed mounting in heat dissipation recess (41), first buffer board (2) with swing joint has between second buffer board (3) main control unit body (1).
2. The negative control device for regulating and controlling the power network in real time according to claim 1, wherein the input end of the main CPU module (5) is connected with a security interface (51), and the output end of the control signal output unit (9) is connected with an alarm (96).
3. The negative control device for regulating and controlling a power network in real time according to claim 1, wherein the output end of the control signal output unit (9) is connected with the human-computer interaction interface (91), the control output interface (92), the display unit (93), the communication interface (94) and the communication module (95).
4. The negative control device for regulating and controlling a power network in real time according to claim 1, wherein a first spring (23) is fixedly installed in the first groove (21) through a bolt between the first movable blocks (22), and a hinge rod (25) is movably connected between the first movable block (22) and the first buffer plate (2) through a hinge piece (24).
5. The negative control device for regulating and controlling the power network in real time according to claim 1, wherein a plurality of second springs (35) are fixedly installed on one side of the supporting plate (34) through bolts, and one ends of the tops of the second springs (35) are fixedly installed on the second buffer plate (3) through bolts.
6. The load control device for regulating and controlling a power network in real time according to claim 1, wherein one side of the support plate (34) is provided with an expansion link (36) which is positioned in the second groove (31) and is fixedly arranged at two ends of the T-shaped screw (32) through bolts.
7. The negative control device for regulating and controlling the power network in real time according to claim 1, wherein a filter screen (43) is fixedly installed on one side, located outside the heat dissipation groove (41), of the U-shaped fixing frame (4) through bolts, and a rubber protective pad (44) is fixedly bonded on one side, located outside the heat dissipation groove (41), of the U-shaped fixing frame (4).
8. The load control device for regulating and controlling a power network in real time according to claim 1, wherein the first buffer plate (2) and the second buffer plate (3) are made of rubber, and one side of the inside of the main controller body (1) is abutted against a protection pad (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701554.9A CN115207902B (en) | 2022-06-17 | 2022-06-17 | Negative control device for regulating and controlling power network in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210701554.9A CN115207902B (en) | 2022-06-17 | 2022-06-17 | Negative control device for regulating and controlling power network in real time |
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| Publication Number | Publication Date |
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| CN115207902A true CN115207902A (en) | 2022-10-18 |
| CN115207902B CN115207902B (en) | 2024-04-16 |
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| CN202210701554.9A Active CN115207902B (en) | 2022-06-17 | 2022-06-17 | Negative control device for regulating and controlling power network in real time |
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| KR20050066392A (en) * | 2003-12-26 | 2005-06-30 | 엘에스산전 주식회사 | Remote load control type electronic watt-hour meter using power line system |
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2022
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| KR20050066392A (en) * | 2003-12-26 | 2005-06-30 | 엘에스산전 주식회사 | Remote load control type electronic watt-hour meter using power line system |
| US20160254666A1 (en) * | 2015-02-27 | 2016-09-01 | Intelligent Power & Energy Research Corporation (Iperc) | Adaptive microgrid control |
| CN108961470A (en) * | 2018-07-06 | 2018-12-07 | 广州番客信息科技有限公司 | It is a kind of can real-time transmission data automobile data recorder |
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| CN115207902B (en) | 2024-04-16 |
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