CN116878838A - In-situ detection connecting device and detection method for wall type damper - Google Patents
In-situ detection connecting device and detection method for wall type damper Download PDFInfo
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- CN116878838A CN116878838A CN202310841857.5A CN202310841857A CN116878838A CN 116878838 A CN116878838 A CN 116878838A CN 202310841857 A CN202310841857 A CN 202310841857A CN 116878838 A CN116878838 A CN 116878838A
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 10
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 230000003416 augmentation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a wall type damper in-situ detection connecting device and a detection method, wherein the device comprises a pre-buried connecting plate, a damper and a sliding connecting piece; the sliding connecting piece comprises an upper connecting plate of the sliding connecting piece, a plurality of sliding blocks, a guide rail and a lower connecting plate of the sliding connecting piece; the embedded connecting plate is arranged on the building structure; the upper connecting plate of the sliding connecting piece is fixedly connected with the embedded connecting plate; the sliding block can be connected to the guide rail in a reciprocating manner along the guide rail and is fixedly connected with the upper connecting plate of the sliding connecting piece; the guide rail is fixedly connected with the lower connecting plate of the sliding connecting piece; the upper damper connecting plate, the lower sliding connecting plate and the guide rail are arranged in a stacked manner from bottom to top, and two ends of the upper damper connecting plate, the lower sliding connecting plate and the guide rail are respectively fixed with a side sealing plate. The in-situ detection connecting device and the detection method for the wall type damper realize in-situ detection of the mechanical property of the wall type damper in the in-service state, and can avoid the influence of the force applied in the detection loading process on the building structure.
Description
Technical Field
The invention relates to the technical field of building detection, in particular to a wall type damper in-situ detection connecting device and a detection method.
Background
The structure passive control technology can effectively reduce the structure dynamic response and improve the structure safety, and mainly comprises the steps of installing energy consumption control devices such as a damper and the like on the structure, dissipating the structure vibration energy, controlling the structure dynamic response and improving the structure safety. The structure passive control technology does not need additional external energy, and has simple structure, low cost and high reliability, thus being widely applied in practical engineering.
The damper is used as a typical structure passive control device, is applied to practical engineering from the last 80 th century, controls the vibration of the structure, and is currently used as a damping device with mature technology and complete standard and is greatly popularized and applied in the practical engineering. Especially, with the promulgation and implementation of the 'construction engineering earthquake-proof management regulation', the technology of earthquake isolation and shock absorption and the like is required to be adopted when the established buildings such as high intensity fortification areas, schools, kindergartens, hospitals, senior citizens institutions, children welfare institutions, emergency command centers, emergency refuge places, broadcast televisions and the like are subjected to earthquake-proof reinforcement.
The wall type damper is widely used as a typical damper product in actual engineering, but the installation of the damper is completed by only carrying out construction quality inspection and daily maintenance, the construction quality inspection carries out material sampling detection and visual quality inspection, the daily maintenance adopts visual inspection, and the time interval is 10 years, so that the current performance detection technology of the damper in the service state basically belongs to the blank. Whether the performance of the damper in the service state is qualified or not directly influences the safety of the structure under the action of disasters such as earthquakes, and the like, the technology for detecting the performance of the damper in the service state is urgently needed in the industry. How to design a wall type damper in-situ detection connecting device and a detection method, so that the damper can normally play a role in damping and energy consumption in a service state, and when mechanical property detection is needed, only a small part of connecting pieces are needed to be replaced to realize convenient and quick damper in-situ mechanical property detection, which is a difficult engineering problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the in-situ detection connecting device and the detection method for the wall type damper, which realize the rapid disassembly and replacement of the connecting piece and the detection loading device by adopting an assembly type design for the connecting mode and the connecting component of the damper, realize the in-situ detection of the mechanical property of the wall type damper in the service state, and avoid the influence of the force applied in the detection loading process on the building structure.
In order to achieve the above-mentioned purpose, the present invention provides a wall-type damper in-situ detection connecting device, which comprises a pre-buried connecting plate, a damper and a sliding connecting piece; the sliding connecting piece comprises a sliding connecting piece upper connecting plate, a plurality of sliding blocks, a guide rail and a sliding connecting piece lower connecting plate; the embedded connecting plate is arranged on a building structure; the upper connecting plate of the sliding connecting piece is fixedly connected with the embedded connecting plate; the sliding block can be connected to the guide rail in a reciprocating manner along the guide rail, and is fixedly connected with the upper connecting plate of the sliding connecting piece; the guide rail is fixedly connected with the lower connecting plate of the sliding connecting piece; the damper comprises a damper upper connecting plate, a damper inner plate and a damper outer cylinder; the upper damper connecting plate is fixed at the top end of the inner damper plate, viscous damping materials or viscoelastic damping materials are filled between the inner damper plate friction and the outer damper cylinder, or the inner damper plate (12) is in friction connection with the outer damper cylinder (11); the damper outer cylinder is fixed on the building structure; the damper upper connecting plate, the sliding connecting piece lower connecting plate and the guide rail are arranged in a stacked mode from bottom to top, and two ends of the damper upper connecting plate, the sliding connecting piece lower connecting plate and the guide rail are respectively fixed with a side sealing plate.
Preferably, the side sealing plates are respectively and fixedly connected with the upper connecting plate of the sliding connecting piece through a fixed connecting plate.
Preferably, one or two loading devices are also included; one end of the loading device is fixedly connected with the side sealing plate in a threaded manner, and the other end of the loading device is connected with a loading connecting plate in a threaded manner and connected with the damper outer cylinder through the loading connecting plate.
Preferably, when two loading devices (4) are adopted, a stability augmentation screw (8) is arranged between the two loading connecting plates (5).
Preferably, the embedded connecting plate is embedded and installed in the building structure or fixed with the building structure through bolts.
Preferably, the damper, the sliding connecting piece, the side sealing plate and the embedded connecting plate are detachably connected through bolts.
Preferably, the loading device has a force and displacement monitoring and recording function or is externally connected with a force sensor and a displacement sensor to record force and displacement data in the detection process.
Preferably, the loading device and the loading connection plate are installed on one side of the damper or symmetrically arranged on two sides of the damper.
Preferably, the loading connection plate comprises a horizontal plate and a vertical plate which are vertically connected; a reinforcing rib is connected between the horizontal plate and the vertical plate.
The invention discloses a wall type damper in-situ detection method based on a wall type damper in-situ detection connecting device, which comprises the following steps:
s1: dismantling the fixed connection plate;
s2: one side or two sides of the damper are provided with a loading device and a loading connecting plate; one end of the loading device is fixedly connected with the side sealing plate in a threaded manner, and the other end of the loading device is connected with the loading connecting plate in a threaded manner and is connected with the damper outer cylinder through the loading connecting plate;
s3: carrying out cyclic reciprocating loading through the loading device;
s4: force and displacement data during the test are recorded.
The invention adopts the technical proposal, which has the following beneficial effects:
because the bottom of the damper is fixedly connected with the building structure, the top of the damper is fixedly connected with the embedded connecting plate through the sliding connecting piece, and the upper connecting plate of the damper, the lower connecting plate of the sliding connecting piece and the outer side of the guide rail of the sliding connecting piece are fixedly provided with the side sealing plates so that the side sealing plates and the upper connecting plate of the sliding connecting piece form a whole which cannot be deformed relatively, and the side sealing plates and the upper connecting plate of the sliding connecting piece are fixedly connected through the fixed connecting plate so as to limit the relative sliding of the guide rail of the sliding connecting piece and the sliding block of the sliding connecting piece. According to the invention, all the components are fixedly connected by the assembly type bolts, so that the damper can cooperatively deform along with the building structure when an earthquake and the like occur, the damping energy consumption function is exerted, the dynamic response of the structure is reduced, and the safety of the structure is improved.
When the mechanical property of the damper needs to be detected in situ, the fixed connecting plate is removed, so that the sliding connecting piece guide rail and the sliding connecting piece sliding block can slide relatively, and the loading device and the loading connecting plate are installed. One end of the loading device is fixedly connected with the upper connecting plate of the damper, the lower connecting plate of the sliding connecting piece and the guide rail of the sliding connecting piece, so that the assembly capable of integrally moving is formed, the other end of the loading device is fixedly connected with the loading connecting plate through a bolt, and the other end of the loading connecting plate is fixed with the outer cylinder of the damper through a bolt.
When the performance of the damper is detected, the damper is loaded in a circulating and reciprocating mode through the loading device, and when a loading head of the loading device stretches out and loads, the loading device drives the damper inner plate, the damper upper connecting plate, the sliding connecting piece lower connecting plate and the sliding connecting piece guide rail assembly to move in a direction away from the loading connecting plate together; when the loading head of the loading device is retracted to be loaded, the loading device drives the damper inner plate, the damper upper connecting plate, the sliding connecting piece lower connecting plate and the sliding connecting piece guide rail assembly to move towards the direction close to the loading connecting plate. In the loading process, the sliding connecting piece guide rail and the sliding connecting piece sliding block slide relatively, and the inner damper plate and the outer damper cylinder deform relatively. The force applied by the detection loading system is converted into the force in the detection system, so that adverse effects caused by the transmission of the detection applied force into the building structure are prevented.
According to the invention, the damper and each connecting part are fixedly connected in a conventional manner by utilizing an assembly type bolt fixing connection manner, so that the damper can play an energy consumption role in the case of earthquake and the like; when the mechanical property of the damper is detected, the fixed connecting plate is removed, so that the sliding connecting piece guide rail and the sliding connecting piece sliding block can slide relatively, the loading device and the loading connecting plate are installed, the mechanical property in-situ detection of the damper is realized, and the influence of the force exerted by the loading system on the structure in the detection process can be avoided. The components of the invention can be processed in a standardized way in a factory, thereby realizing industrial production, being convenient and quick to install, maintain and replace and having wide popularization and application values.
Drawings
FIG. 1 is a schematic diagram of a damper operating state of a wall damper in-situ detection connection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wall-type damper in-situ detection connection device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure of a damper performance detection loading device of a wall damper in-situ detection connection device according to an embodiment of the present invention when the damper performance detection loading device is extended;
FIG. 4 is a schematic view of a structure of a damper performance detection loading device of a wall damper in-situ detection connection device according to an embodiment of the present invention when retracted;
FIG. 5 is a schematic diagram of a first structure of a loading device of an in-situ detection connection device of a wall-type damper according to an embodiment of the present invention when the loading device is symmetrically disposed on two sides of the damper;
fig. 6 is a schematic diagram of a second structure of a loading device of an in-situ detection connection device of a wall damper according to an embodiment of the present invention when the loading device is symmetrically disposed on two sides of the damper.
Detailed Description
The following description of the preferred embodiments of the present invention will be given with reference to fig. 1 to 6 of the accompanying drawings, so that the functions and features of the present invention can be better understood.
Referring to fig. 1, an in-situ detection connection device for a wall-type damper according to an embodiment of the present invention includes a pre-buried connection board 6, a damper 1 and a sliding connection member 2; the sliding connector 2 comprises a sliding connector upper connecting plate 21, a plurality of sliding blocks 22, a guide rail 23 and a sliding connector lower connecting plate 24; the embedded connecting plate 6 is arranged on a building structure; the upper connecting plate 21 of the sliding connecting piece is fixedly connected with the embedded connecting plate 6; the sliding block 22 can be connected to the guide rail 23 in a reciprocating manner along the guide rail 23, and the sliding block 22 is fixedly connected with the upper connecting plate 21 of the sliding connecting piece; the guide rail 23 is fixedly connected with a lower connecting plate 24 of the sliding connecting piece; the damper 1 comprises a damper upper connecting plate 13, a damper inner plate 12 and a damper outer cylinder 11; the upper damper connecting plate 13 is fixed at the top end of the inner damper plate 12, viscous damping materials or viscoelastic damping materials are filled between the inner damper plate 12 and the outer damper cylinder 11, or the inner damper plate 12 is in friction connection with the outer damper cylinder 11; the damper outer cylinder 11 is fixed to a building structure; the damper upper connecting plate 13, the sliding connecting piece lower connecting plate 24 and the guide rail 23 are arranged in a stacked manner from bottom to top, and two ends of the damper upper connecting plate are respectively fixed with one side sealing plate 3.
The side sealing plates 3 are respectively fixedly connected with the upper connecting plate 21 of the sliding connecting piece through a fixed connecting plate 7.
The side sealing plates 3 are fixedly arranged outside the guide rails 23 to form a whole which cannot be deformed relatively, the side sealing plates 3 and the upper connecting plates 21 are fixedly connected through the fixed connecting plates 7, the relative sliding of the guide rails 23 and the sliding blocks 22 is limited, and the damper 1 can normally play a role in normal times.
According to the invention, all parts are in an assembled bolt fixed connection mode, so that the damper 1 can be ensured to cooperatively deform along with a building structure when an earthquake and the like occur, the damping energy consumption function is exerted, the dynamic response of the structure is reduced, and the safety of the structure is improved.
Referring to fig. 2 to 4, when the mechanical properties of the damper 1 need to be detected in situ, the fixed connection plate 7 is removed to enable the guide rail 23 and the slide block 22 to slide relatively, and one or two loading devices 4 are further included; one end of the loading device 4 is fixedly connected with the side sealing plate 3 in a threaded manner, so that the loading device 4, the upper damper connecting plate 13, the lower sliding connecting plate 24 and the guide rail 23 form a combined body capable of integrally moving; the other end of the loading device 4 is connected with a loading connecting plate 5 in a threaded manner and is connected with the damper outer cylinder 11 through the loading connecting plate 5.
Preferably, the pre-buried connection plate 6 is pre-buried installed to the building structure or fixed to the building structure by bolts.
Preferably, the damper 1, the sliding connecting piece 2, the side sealing plate 3 and the embedded connecting plate 6 are detachably connected through bolts.
Preferably, the loading device 4 has a force and displacement monitoring and recording function or the loading device 4 is externally connected with a force sensor and a displacement sensor to record force and displacement data in the detection process.
Preferably, the loading connection plate 5 comprises a horizontal plate member and a vertical plate member vertically connected; a reinforcing rib is connected between the horizontal plate and the vertical plate.
Referring to fig. 5 and 6, the loading device 4 and the loading connection plate 5 may be symmetrically arranged at two sides of the damper 1, and when two loading devices 4 are symmetrically arranged at two sides, a stability augmentation screw 8 may be further inserted between the two loading connection plates 5, so as to improve the stability of the whole system in the detection loading process.
Referring to fig. 1 to 4, the method for in-situ detection of a wall damper based on the in-situ detection connection device of a wall damper of the present invention includes the steps of:
s1: dismantling the fixed connection plate 7; the guide rail 23 and the sliding block 22 can slide relatively;
s2: a loading device 4 and a loading connecting plate 5 are arranged on one side or two sides of the damper 1; one end of the loading device 4 is fixedly connected with the side sealing plate 3 in a threaded manner, so that the loading device is a combined body capable of moving integrally, and the other end of the loading device 4 is connected with the loading connecting plate 5 in a threaded manner and is connected with the damper outer cylinder 11 through the loading connecting plate 5;
s3: carrying out cyclic reciprocating loading through a loading device 4;
when the loading head of the loading device 4 stretches out for loading, the loading device 4 drives the damper inner plate 12, the damper upper connecting plate 13, the sliding connecting piece lower connecting plate 24 and the guide rail 23 assembly to move in a direction away from the loading connecting plate 5; when the loading head of the loading device 4 is retracted to be loaded, the loading device 4 drives the damper inner plate 12, the damper upper connecting plate 13, the sliding connecting piece lower connecting plate 24 and the guide rail 23 to move together in the direction approaching to the loading connecting plate 5. During loading, the guide rail 23 and the slide block 22 slide relatively, and the damper inner plate 12 and the damper outer cylinder 11 deform relatively. The force applied by the detection loading system is converted into the force in the detection system, so that adverse effects caused by the transmission of the detection applied force into the building structure are prevented.
S4: force and displacement data during the test are recorded.
When the performance of the damper is detected, the loading device 4 carries out cyclic loading, and the loading device 4 drives the damper inner plate 12, the damper upper connecting plate 13, the sliding connecting piece lower connecting plate 24 and the guide rail 23 to carry out reciprocating motion together, so that the sliding block 22 and the guide rail 23 slide relatively.
The force applied by the detection loading system is converted into the force in the detection system, so that adverse effects caused by the transmission of the detection applied force into the building structure are prevented.
The damper 1, the sliding connecting piece 2, the side sealing plates 3, the loading device 4, the loading connecting plate 5, the embedded connecting plate 6 and the fixed connecting plate 7 are fixed by bolts, so that quick disassembly and replacement are realized.
Based on the working principle and deformation characteristics of the wall type damper, the invention adopts an assembly type bolt fixed connection mode, and the damper 1 is fixedly connected with each connecting part under the conventional condition, so that the damper 1 can play the role of energy consumption under the conditions of earthquake and the like; when the mechanical property of the damper is required to be detected, the fixed connecting plate 7 is removed, the loading device 4 and the loading connecting plate 5 are installed, the mechanical property in-situ detection of the damper is realized, and the influence of the force exerted by the loading system on the structure in the detection process can be avoided.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (10)
1. The in-situ detection connecting device for the wall type damper is characterized by comprising a pre-buried connecting plate (6), a damper (1) and a sliding connecting piece (2); the sliding connecting piece (2) comprises a sliding connecting piece upper connecting plate (21), a plurality of sliding blocks (22), a guide rail (23) and a sliding connecting piece lower connecting plate (24); the embedded connecting plate (6) is arranged on a building structure; the upper connecting plate (21) of the sliding connecting piece is fixedly connected with the embedded connecting plate (6); the sliding block (22) can be connected to the guide rail (23) in a reciprocating manner along the guide rail (23), and the sliding block (22) is fixedly connected with the upper connecting plate (21) of the sliding connecting piece; the guide rail (23) is fixedly connected with the lower connecting plate (24) of the sliding connecting piece; the damper (1) comprises a damper upper connecting plate (13), a damper inner plate (12) and a damper outer cylinder (11); the upper damper connecting plate (13) is fixed at the top end of the inner damper plate (12), viscous damping materials or viscoelastic damping materials are filled between the inner damper plate (12) and the outer damper cylinder (11), or the inner damper plate (12) is in friction connection with the outer damper cylinder (11); the damper outer cylinder (11) is fixed to the building structure; the damper upper connecting plate (13), the sliding connecting piece lower connecting plate (24) and the guide rail (23) are arranged in a stacked mode from bottom to top, and two ends of the damper upper connecting plate are respectively fixed with one side sealing plate (3).
2. The in-situ detection connecting device of the wall damper according to claim 1, wherein the side sealing plates (3) are fixedly connected with the upper connecting plate (21) of the sliding connecting piece through a fixed connecting plate (7) respectively.
3. The in-situ detection connection device of a wall damper according to claim 1, further comprising one or two loading devices (4); one end of the loading device (4) is fixedly connected with the side sealing plate (3) in a threaded manner, and the other end of the loading device (4) is connected with a loading connecting plate (5) in a threaded manner and is connected with the damper outer cylinder (11) through the loading connecting plate (5).
4. A wall damper in-situ detection connection device according to claim 3, characterized in that when two loading devices (4) are used, a stability augmentation screw (8) is arranged between the two loading connection plates (5).
5. The in-situ detection connecting device of the wall damper according to claim 1, wherein the embedded connecting plate (6) is embedded and installed on the building structure or fixed with the building structure through bolts.
6. The in-situ detection connecting device of the wall damper according to claim 1, wherein the damper (1), the sliding connecting piece (2), the side sealing plate (3) and the embedded connecting plate (6) are detachably connected through bolts.
7. A wall damper in-situ detection connection device according to claim 3, wherein the loading device (4) has a force and displacement monitoring and recording function or the loading device (4) is externally connected with a force sensor and a displacement sensor to record force and displacement data in the detection process.
8. A wall damper in-situ detection connection device according to claim 3, characterized in that the loading device (4) and the loading connection plate (5) are mounted on a single side of the damper (1) or symmetrically arranged on both sides of the damper (1).
9. A wall damper in-situ detection connection device according to claim 3, characterized in that the loading connection plate (5) comprises a horizontal plate and a vertical plate vertically connected; a reinforcing rib is connected between the horizontal plate and the vertical plate.
10. A wall-type damper in-situ detection method based on the wall-type damper in-situ detection connecting device of claim 2, comprising the steps of:
s1: -dismantling the fixed connection plate (7);
s2: a loading device (4) and a loading connecting plate (5) are arranged on one side or two sides of the damper (1); one end of the loading device (4) is fixedly connected with the side sealing plate (3) in a threaded manner, and the other end of the loading device (4) is connected with the loading connecting plate (5) in a threaded manner and is connected with the damper outer cylinder (11) through the loading connecting plate (5);
s3: carrying out cyclic reciprocating loading through the loading device (4);
s4: force and displacement data during the test are recorded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310841857.5A CN116878838A (en) | 2023-07-10 | 2023-07-10 | In-situ detection connecting device and detection method for wall type damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310841857.5A CN116878838A (en) | 2023-07-10 | 2023-07-10 | In-situ detection connecting device and detection method for wall type damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116878838A true CN116878838A (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310841857.5A Pending CN116878838A (en) | 2023-07-10 | 2023-07-10 | In-situ detection connecting device and detection method for wall type damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116878838A (en) |
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2023
- 2023-07-10 CN CN202310841857.5A patent/CN116878838A/en active Pending
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