CN112346484B - Energy-saving monitoring method for glass curtain wall of intelligent building - Google Patents
Energy-saving monitoring method for glass curtain wall of intelligent building Download PDFInfo
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- CN112346484B CN112346484B CN202011321388.7A CN202011321388A CN112346484B CN 112346484 B CN112346484 B CN 112346484B CN 202011321388 A CN202011321388 A CN 202011321388A CN 112346484 B CN112346484 B CN 112346484B
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- 239000011521 glass Substances 0.000 title claims abstract description 30
- 238000012544 monitoring process Methods 0.000 title abstract description 12
- 238000000034 method Methods 0.000 title abstract description 9
- 238000003466 welding Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 15
- 238000007637 random forest analysis Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses an energy-saving monitoring method for a glass curtain wall of an intelligent building, which comprises the following steps: a: a solar panel for supplying power to the information acquisition device of the glass curtain wall is arranged on the glass curtain wall; b: a pressure sensor for collecting the air pressure value of the airtight structure is arranged on the airtight structure between the glass mounting grooves, and pressure data collected by the pressure sensor is transmitted to the RS485 communication module; c: uploading the pressure data to a management system upper computer for evaluating the data, and sending an adjusting signal by the upper computer according to an evaluation result; d: an air pump for adjusting air pressure is arranged on the frame structure of the glass curtain wall.
Description
Technical Field
The invention relates to an energy-saving monitoring method for a glass curtain wall of an intelligent building, in particular to an energy-saving monitoring method which can realize monitoring and maintenance reminding of the curtain wall without substantially changing a curtain wall structure.
Background
At present, in many buildings, a glass curtain wall is directly used as a wall body, and the influence of the glass curtain wall on the environment is obviously greater than that of a common brick wall, so that the state of the glass curtain wall is one of the monitoring key points of an intelligent building system; the glass curtain wall in the prior art is composed of a frame (such as aluminum alloy and the like) and glass arranged on the frame, the glass and the frame are connected and sealed through structural members and sealing glue, and the energy consumption of a building is directly influenced by the quality of the sealing effect.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an energy-saving monitoring method for monitoring and reminding maintenance of a curtain wall without substantially changing a curtain wall structure; a second object of the present invention is to provide a supporting device for a glass curtain wall of an intelligent building.
The technical scheme is as follows: in order to achieve the purpose, the energy-saving monitoring method for the glass curtain wall of the intelligent building comprises the following steps of:
a: a solar panel for supplying power to the information acquisition device of the glass curtain wall is arranged on the glass curtain wall;
b: a pressure sensor for collecting the air pressure value of the airtight structure is arranged on the airtight structure between the glass mounting grooves, and the pressure data collected by the pressure sensor is transmitted to the communication module;
c: uploading the pressure data to a management system upper computer for evaluating the data, and sending an adjusting signal by the upper computer according to an evaluation result;
d: an air pump for adjusting air pressure is arranged on the frame structure of the glass curtain wall.
The support device for the glass curtain wall of the intelligent building comprises a base, wherein a motor is fixedly installed inside the base, a driving shaft is arranged inside the motor, a first ratchet mechanism and a second ratchet mechanism are respectively arranged on the surface of the driving shaft from bottom to top, a first connecting mechanism is arranged on the top surface of the second ratchet mechanism, a support plate is fixedly installed on the top surface of the first connecting mechanism, a first connecting block is welded on the top surface of the support plate, the first connecting block is rotatably connected with the fixed block through a shaft, the fixed block is rotatably connected with a second connecting block through a shaft, a solar panel main body is welded on the top surface of the fixed block, a support rod is welded on the bottom surface of the second connecting block, a lantern ring is integrally installed on the bottom surface of the support rod, a first reciprocating screw rod penetrates through the axis of the lantern ring, a conical gear set is arranged at one end of the first reciprocating screw rod, a second connecting mechanism is connected at one end of the conical screw rod, a large gear is fixed on the bottom surface of the second connecting mechanism, a gear ring is meshed with a gear ring fixedly installed on the upper surface of the base.
Furthermore, a pinion is connected to one end surface of the first ratchet mechanism in a meshed mode, a second reciprocating screw rod penetrates through the center of the pinion in a threaded mode, a first junction box is arranged on the bottom surface of the pinion, a connecting wire is connected to the surface of the first junction box in a sliding mode, a second junction box is connected to one end, away from the first junction box, of the connecting wire in a sliding mode, the second junction box is connected with a linkage gear through a shaft, and a tooth block is connected to one end of the linkage gear in a meshed mode.
Furthermore, a fixed shaft is fixedly mounted inside the second ratchet mechanism, a volute spiral spring is sleeved on the surface of one end of the fixed shaft, ratchets are fixedly sleeved on the surface of the volute spiral spring, one ends, far away from the volute spiral spring, of the ratchets are meshed with a driving gear, the center of the bottom surface of the driving gear is in key connection with a driving shaft, the second ratchet mechanism is consistent with the internal structure of the first ratchet mechanism, and the ratchets inside the second ratchet mechanism are opposite to the ratchets inside the first ratchet mechanism in distribution direction.
Furthermore, the second connecting mechanism comprises a sleeve, the second connecting mechanism is consistent with the internal structure of the first connecting mechanism, sliding grooves are formed in the surface of the sleeve at equal angles, a limiting rod is connected to the inside of the sliding grooves in a sliding mode, and a supporting shaft is integrally installed at one end, extending into the sleeve, of the limiting rod.
Furthermore, the upper ends of the second reciprocating screw rod and the tooth block extend into the limiting groove, the limiting groove is formed in the bottom surface of the supporting plate, and the upper ends of the second reciprocating screw rod and the tooth block are in a T-shaped structure.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: 1. on the premise of not substantially changing the curtain wall structure, monitoring and maintenance reminding of the curtain wall can be realized; 2. the inclination angle of the solar panel main body can be adjusted, so that the solar panel main body can fully absorb solar energy; 3. the solar panel main body height adjusting device is beneficial to adjusting the height of the solar panel main body, and on the premise of fully absorbing solar energy, the follow-up maintenance work of descending the solar panel main body is facilitated, the maintenance work by ascending the height is avoided, and the safety of the whole maintenance work is improved.
Drawings
FIG. 1 is a schematic view of the overall front cross-sectional structure of the present invention;
FIG. 2 is a schematic view of the second ratchet mechanism according to the present invention;
FIG. 3 is a schematic view of a front cross-sectional connection structure of a second reciprocating screw and a first junction box according to the present invention;
FIG. 4 is a perspective view of the sleeve of the present invention;
FIG. 5 is a schematic top view of the second ratchet mechanism according to the present invention;
FIG. 6 is a schematic top view of a cross-sectional structure of the first connecting mechanism according to the present invention;
FIG. 7 is a schematic view of the bottom connection structure of the tooth block and the limiting groove of the present invention;
FIG. 8 is a schematic view of a top-view connection structure of a bull gear and a ring gear according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1 to 8, the energy-saving monitoring method for the glass curtain wall of the intelligent building comprises the following steps:
a: a solar panel for supplying power to the information acquisition device of the glass curtain wall is arranged on the glass curtain wall;
b: a pressure sensor for collecting the air pressure value of the airtight structure is arranged on the airtight structure between the glass mounting grooves, and pressure data collected by the pressure sensor is transmitted to the RS485 communication module;
c: uploading the pressure data to a management system upper computer for evaluating the data, and sending an adjusting signal by the upper computer according to an evaluation result;
d: an air pump for adjusting air pressure is arranged on the frame structure of the glass curtain wall.
B, uploading the original pressure data obtained in the step b to a cloud end by an upper computer where the intelligent building management system is located, and calling the original pressure data by a safety supervision department and a curtain wall supplier; the curtain wall supplier adjusts the maintenance period according to the data, and uses the pressure data as the learning value of the maintenance period model for perfecting the maintenance period model; the safety supervision department inspects key inspection buildings according to the pressure data; the maintenance period model is based on a random forest model, a random forest model is constructed by taking pressure data as sample data, then the pressure data of the glass curtain walls are collected in the building where each glass curtain wall is located, the pressure data are judged by adopting the random forest model, and whether maintenance is needed or not is divided.
This embodiment intelligent building's glass curtain wall's strutting arrangement, including base 1, motor 2 and solar panel main part 11, the inside fixed mounting of base 1 has motor 2, and the inside of motor 2 is provided with drive shaft 3, the surface of drive shaft 3 is provided with first ratchet 4 and second ratchet 5 respectively from lower to upper, and the top surface of second ratchet 5 is provided with first connecting mechanism 6, the top surface fixed mounting of first connecting mechanism 6 has backup pad 7, and the top surface welding of backup pad 7 has first connecting block 8, first connecting block 8 rotates with fixed block 10 through the axle and is connected, and fixed block 10 rotates with second connecting block 9 through the axle and is connected, and the top surface welding of fixed block 10 has solar panel main part 11, the bottom surface welding of second connecting block 9 has bracing piece 12, and the lantern ring 13 is installed to the bottom surface integration of bracing piece 12, the axle center department bolt of lantern ring 13 has run through first reciprocating screw 14, and the one end of first reciprocating screw 14 is provided with conical gear set 15, the one end of conical gear set 15 is connected with second connecting mechanism 16, and the bottom surface of second connecting mechanism 16 is fixed with gear wheel 17, the gear ring meshing has gear wheel 18, and the surface mounting is in base 1.
A pinion 19 is connected to one end surface of the first ratchet mechanism 4 in a meshing manner, a second reciprocating screw rod 20 penetrates through the center of the pinion 19 in a threaded manner, a first junction box 21 is arranged on the bottom surface of the pinion 19, a connecting wire 22 is connected to the surface of the first junction box 21 in a sliding manner, a second junction box 23 is connected to one end, far away from the first junction box 21, of the connecting wire 22 in a sliding manner, a linkage gear 24 is connected to the second junction box 23 through a shaft, and a tooth block 25 is connected to one end of the linkage gear 24 in a meshing manner.
The second ratchet mechanism 5 comprises a driving gear 51, ratchet teeth 52, a spiral spring 53 and a fixed shaft 54, the fixed shaft 54 is fixedly installed inside the second ratchet mechanism 5, the spiral spring 53 is sleeved on one end surface of the fixed shaft 54, the ratchet teeth 52 are fixedly sleeved on the surface of the spiral spring 53, one end, far away from the spiral spring 53, of each ratchet tooth 52 is connected with the driving gear 51 in a meshed mode, the center of the bottom surface of the driving gear 51 is in key connection with the driving shaft 3, the second ratchet mechanism 5 and the first ratchet mechanism 4 are consistent in internal structure, the ratchet teeth 52 inside the second ratchet mechanism 5 are opposite to the distribution direction of the ratchet teeth 52 inside the first ratchet mechanism 4, when the first ratchet mechanism 4 rotates, the second ratchet mechanism 5 is in a rotation stopping state, and when the second ratchet mechanism 5 rotates, the first ratchet mechanism 4 is in a rotation stopping state.
The upper ends of the second reciprocating screw rod 20 and the tooth block 25 extend into the limiting groove 26, the limiting groove 26 is arranged on the bottom surface of the supporting plate 7, and the upper ends of the second reciprocating screw rod 20 and the tooth block 25 are in a T-shaped structure, so that the supporting plate 7 is driven to lift conveniently, and the phenomenon that the second reciprocating screw rod 20 and the tooth block 25 fall off is avoided.
The working principle of the embodiment is as follows: according to fig. 1 to 2, 4 to 6 and 8, firstly, the base 1 is placed at a proper position, then the motor 2 is started after being connected with an external power supply, and the motor 2 is controlled to rotate forward, the motor 2 drives the driving shaft 3 to rotate forward when rotating forward, so that the driving shaft 3 drives the driving gear 51 inside the second ratchet mechanism 5 to rotate forward, the second ratchet mechanism 5 drives the second ratchet mechanism 5 to rotate through the ratchet teeth 52 when rotating forward, at this time, the driving gear 51 inside the first ratchet mechanism 4 idles through the arrangement that the ratchet teeth 52 inside the first ratchet mechanism 4 and the ratchet teeth inside the second ratchet mechanism 5 are distributed in reverse direction, and at the same time, the second ratchet mechanism 5 drives the sleeve 161 inside the first ratchet mechanism 6 to rotate, so that the first connecting mechanism 6 drives the limiting rod 163 to rotate through the chute 162, so that the limiting rod 163 drives the supporting shaft 164 to rotate, so that the supporting shaft 164 drives the supporting plate 7 to rotate, therefore, the working of adjusting the sun-facing angle of the solar panel main body 11 is performed, meanwhile, the support plate 7 drives the second connecting mechanism 16 to rotate when rotating, the second connecting mechanism 16 is consistent with the internal structure of the first connecting mechanism 6, so that the second connecting mechanism 16 drives the gearwheel 17 to rotate around the base 1 by adopting the same operation mode as the first connecting mechanism 6, at the moment, under the meshing action of the gearwheel 17 and the gear ring 18, the gearwheel 17 simultaneously rotates, so that the gearwheel 17 drives the bevel gear set 15 to rotate through the second connecting mechanism 16, the bevel gear set 15 drives the first reciprocating screw rod 14 to rotate, so that the first reciprocating screw rod 14 drives the lantern ring 13 in threaded connection to slide when rotating, the lantern ring 13 drives the lower end of the support rod 12 to incline, and the upper end of the support rod 12 drives the solar panel main body 11 to incline through the second connecting block 9, the inclination angle of the solar panel main body 11 can be conveniently adjusted, so that the solar panel main body 11 can fully absorb solar energy;
according to fig. 1 to 8, when maintenance work needs to be performed on the solar panel main body 11, a worker controls the motor 2 to rotate reversely, so that the motor 2 drives the driving gear 51 in the first ratchet mechanism 4 to rotate reversely through the driving shaft 3, so that the driving gear 51 drives the first ratchet mechanism 4 to rotate reversely through the ratchet 52, and simultaneously the driving gear 51 in the second ratchet mechanism 5 idles, the first ratchet mechanism 4 drives the pinion 19 to rotate through meshing connection when rotating, the pinion 19 drives the second reciprocating lead screw 20 connected through threads to descend when rotating, and simultaneously the pinion 19 drives the first junction box 21 to rotate when rotating, so that the first junction box 21 drives the second junction box 23 to rotate through the connecting line 22, the second junction box 23 drives the linkage gear 24 to rotate through a shaft when rotating, so that the linkage gear 24 drives the tooth block 25 to descend through meshing connection, thereby facilitating the synchronous driving of the two ends of the support plate 7 by the second reciprocating lead screw 20 and the tooth block 25 through the limiting groove 26 to descend, facilitating the maintenance work on the solar panel main body 11, avoiding the ascending work when maintenance, and improving the safety of the maintenance work.
The specific use method of the support device in the embodiment comprises the following steps: 1. the base 1 is fixed in position. 2. Connect external power source with motor 2 and start to control motor 2 and be corotation, make motor 2 drive second ratchet 5 rotatory through drive shaft 3, make second ratchet 5 drive backup pad 7 rotatory through first coupling mechanism 6, make backup pad 7 drive the solar panel main part 11 that the top set up and carry out the angle modulation that faces the sun. 3. The backup pad 7 drives the gear wheel 17 to rotate around the base 1 through the second connecting mechanism 16 when rotating, and under the meshing of the gear wheel 17 and the gear ring 18, the gear wheel 17 rotates, the gear wheel 17 drives the bevel gear set 15 to operate through the second connecting mechanism 16, the bevel gear set 15 drives the first reciprocating screw rod 14 to rotate, the lantern ring 13 slides, and the inclination angle of the solar panel main body 11 is synchronously adjusted. 4. The motor 2 is controlled to rotate reversely, so that the motor 2 drives the first ratchet mechanism 4 to rotate through the driving shaft 3, the first ratchet mechanism 4 drives the pinion 19 to rotate, and the pinion 19 drives the second reciprocating screw rod 20 connected with the screw thread to slide. 5. Pinion 19 drives first terminal box 21 rotatory when rotatory for first terminal box 21 passes through connecting wire 22 and stimulates second terminal box 23 rotatory, makes second terminal box 23 rotatory through axle drive linkage gear 24, thereby makes linkage gear 24 drive the tooth piece 25 and slides, makes the both ends of backup pad 7 go up and down simultaneously, conveniently adjusts the height of solar panel main part 11.
Claims (1)
1. The utility model provides an intelligent building's glass curtain wall's strutting arrangement, includes base (1), its characterized in that: the internal fixed mounting of base (1) has motor (2), the inside of motor (2) is provided with drive shaft (3), the surface of drive shaft (3) is supreme by lower is provided with first ratchet (4) and second ratchet (5) respectively, the top surface of second ratchet (5) is provided with first coupling mechanism (6), the top surface fixed mounting of first coupling mechanism (6) has backup pad (7), the top surface welding of backup pad (7) has first connecting block (8), first connecting block (8) is connected with fixed block (10) rotation through the axle, fixed block (10) is connected with second connecting block (9) rotation through the axle to the top surface welding of fixed block (10) has solar panel main part (11), the bottom surface welding of second connecting block (9) has bracing piece (12), the lantern ring (13) is installed to the bottom surface integration of bracing piece (12), the axle center department bolt of lantern ring (13) has run through first reciprocating screw rod (14), the one end of first connecting rod (14) is provided with cone gear train (15), the one end welding of cone gear train (15) is connected with second gear (16), second gear wheel (17) is connected with reciprocal gear mechanism (17), the gear ring (18) is fixedly arranged on the upper surface of the base (1);
a pinion (19) is connected to the surface of one end of the first ratchet mechanism (4) in a meshing manner, a second reciprocating screw rod (20) penetrates through the center of the pinion (19) in a threaded manner, a first junction box (21) is arranged on the bottom surface of the pinion (19), a connecting wire (22) is connected to the surface of the first junction box (21) in a sliding manner, a second junction box (23) is connected to one end, far away from the first junction box (21), of the connecting wire (22) in a sliding manner, the second junction box (23) is connected with a linkage gear (24) through a shaft, and a tooth block (25) is connected to one end of the linkage gear (24) in a meshing manner;
a fixed shaft (54) is fixedly installed inside the second ratchet mechanism (5), a volute spiral spring (53) is sleeved on one end surface of the fixed shaft (54), ratchets (52) are fixedly sleeved on the surface of the volute spiral spring (53), one end, far away from the volute spiral spring (53), of each ratchet (52) is connected with a driving gear (51) in a meshed mode, the center of the bottom face of the driving gear (51) is in key connection with the driving shaft (3), the second ratchet mechanism (5) is consistent with the internal structure of the first ratchet mechanism (4), and the ratchets (52) inside the second ratchet mechanism (5) are opposite to the distribution direction of the ratchets (52) inside the first ratchet mechanism (4);
the second connecting mechanism (16) comprises a sleeve (161), the structure of the second connecting mechanism (16) is consistent with that of the first connecting mechanism (6), a sliding groove (162) is formed in the surface of the sleeve (161) at an equal angle, a limiting rod (163) is connected to the inside of the sliding groove (162) in a sliding mode, and a supporting shaft (164) is integrally installed at one end, extending into the sleeve (161), of the limiting rod (163);
the upper ends of the second reciprocating screw rod (20) and the tooth block (25) extend into the limiting groove (26), the limiting groove (26) is formed in the bottom surface of the supporting plate (7), and the upper ends of the second reciprocating screw rod (20) and the tooth block (25) are in a T-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321388.7A CN112346484B (en) | 2020-11-23 | 2020-11-23 | Energy-saving monitoring method for glass curtain wall of intelligent building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321388.7A CN112346484B (en) | 2020-11-23 | 2020-11-23 | Energy-saving monitoring method for glass curtain wall of intelligent building |
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| Publication Number | Publication Date |
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| CN112346484A CN112346484A (en) | 2021-02-09 |
| CN112346484B true CN112346484B (en) | 2023-01-31 |
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| CN202011321388.7A Active CN112346484B (en) | 2020-11-23 | 2020-11-23 | Energy-saving monitoring method for glass curtain wall of intelligent building |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113108259A (en) * | 2021-04-21 | 2021-07-13 | 丁力 | Outdoor wisdom lighting device of effective lodging-resistant |
| CN114338977B (en) * | 2021-12-15 | 2024-02-20 | 镇江汇辰智能系统有限公司 | Digital multifunctional intelligent monitoring terminal and monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654007B (en) * | 2017-11-06 | 2019-11-08 | 上海迪探节能科技有限公司 | A kind of glass curtain wall with automatic regulation function |
| CN108551316A (en) * | 2018-05-12 | 2018-09-18 | 无锡同春新能源科技有限公司 | One kind is sat on the fence formula folk art term intelligent control solar energy mounting bracket |
| CN112462806A (en) * | 2018-05-23 | 2021-03-09 | 苏静 | Building monitoring device and using method |
| CN110429902B (en) * | 2019-07-31 | 2021-07-30 | 南京溧水高新产业股权投资有限公司 | Photovoltaic board baoding equipment for intelligent building convenient to adjustment daylighting angle |
| CN111828811B (en) * | 2020-07-29 | 2022-01-14 | 深圳宏伟时代自控有限公司 | Make things convenient for angle position control's circulating oscillating intelligent building to use monitoring device |
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Inventor after: Zhou Yafeng Inventor after: Zhu Qiwen Inventor before: Zhu Qiwen Inventor before: Zhou Yafeng |