CN207766221U - A kind of three axis synergy holder photovoltaic tracking systems - Google Patents
A kind of three axis synergy holder photovoltaic tracking systems Download PDFInfo
- Publication number
- CN207766221U CN207766221U CN201820002629.3U CN201820002629U CN207766221U CN 207766221 U CN207766221 U CN 207766221U CN 201820002629 U CN201820002629 U CN 201820002629U CN 207766221 U CN207766221 U CN 207766221U
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- CN
- China
- Prior art keywords
- pull rod
- motor
- speculum
- photovoltaic panel
- axis
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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
- Y02E10/52—PV systems with concentrators
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a kind of three axis synergy holder photovoltaic tracking systems, including the rotation axis (10) being installed on multiple pilums (7), the active beam (11) being axially arranged along the rotation axis (10), successively laterally the multigroup first driven beam (12) for being erected on the active beam and second from foundation (13), it is rotatably installed with photovoltaic panel (4) and speculum (5) on first driven beam (12) and the second driven beam (13) described in every group, the utility model is additionally provided with the photovoltaic panel pull rod (9) for pulling photovoltaic panel (4) and pulls the speculum pull rod (8) of speculum (5), for driving main frame pull rod (110), photovoltaic panel pull rod (9), the driving device of speculum pull rod (8), control device for controlling the driving device.The utility model tracks illumination in the case where not increasing floor space, using three axis Synergistic structures, can increase intensity of illumination by speculum, take full advantage of solar energy.
Description
Technical field
The utility model is related to solar photovoltaic bracket fields, more particularly to a kind of three axis synergy holder photovoltaic tracking systems
System.
Background technology
Solar photovoltaic bracket is the special holder that fixed solar panel is installed in photovoltaic generating system.Photovoltaic at present
Holder is broadly divided into fixed type photovoltaic holder (setting angle is optimum angle of incidence), flat single-axis sun tracking holder, oblique single-axis sun tracking holder
With biaxial sun-tracking holder, wherein respectively there is advantage and disadvantage, wherein with biaxial sun-tracking holder generating efficiency highest, but since the system needs
It wants the moment to track sunlight, causes manufacturing cost to increase and increase with floor space, and the sunlight on vacant lot is without fully profit
With.
Utility model content
The purpose of the utility model is to overcome shortcoming in the prior art, a kind of east-west direction and North and South direction are provided
Synchronous solar tracking, the light radiation amount for increasing photovoltaic panel, improve the three axis synergy holder photovoltaic tracking of one kind of the efficiency of solar energy utilization
System.
In order to solve the above technical problems, the utility model is solved by following technical proposals：
A kind of three axis synergy holder photovoltaic tracking systems, including be installed on multiple pilums rotation axis, along the rotation
Active beam that axis is axially arranged, the multigroup first driven beam being laterally erected on the active beam successively and second from foundation, use
In the fixation active beam, the first driven beam and second from the main frame of foundation；
It is rotatably installed with photovoltaic panel and speculum on first driven beam and the second driven beam described in every group；
The pilum is equipped with main frame pull rod, the main frame for pulling the main frame to be rotated around the rotation axis
Frame is equipped with for pulling the photovoltaic panel around the photovoltaic panel pull rod of the described first driven beam rotation and for pulling the reflection
The speculum pull rod that mirror is rotated around described second from foundation；
The three axis synergy holder photovoltaic tracking system be additionally provided with for drive the main frame pull rod, photovoltaic panel pull rod,
The driving device of speculum pull rod movement, for the control device provides electricity at the control device for controlling the driving device
The accumulator in source.
Further, the driving device includes for driving the first motor of the main frame pull rod, for driving
The second motor, the third motor for driving the speculum pull rod for stating photovoltaic panel pull rod, the first motor, the second electricity
Machine, third motor are electrically connected with the control device.
Further, multiple first support bars and multiple are connected with bearing on the described first driven beam and the second driven beam
Second support bar, the photovoltaic panel are fixedly installed on the multiple first support bar, and the speculum is fixedly installed in described
On multiple second support bars, the multiple first support bar is connected by head rod activity, the multiple second support bar quilt
Second connecting rod activity is connected, and one end of the head rod is movably connected on successively on the photovoltaic panel pull rod, and described the
One end of two connecting rods is movably connected on successively on speculum pull rod.
Further, the main frame pull rod is the lead screw being installed on the pilum, and one end of the lead screw is articulated with
On the main frame of the rotation axis side, the other end is connected with the first motor, and the first motor drives the lead screw to do
Stretching motion.
Further, second motor and third motor are fixedly installed on the main frame, second motor with
The swing component for driving the photovoltaic panel pull rod and speculum pull rod to be axially moved, the swing component are respectively provided on third motor
One end be articulated on the corresponding photovoltaic panel pull rod and on speculum pull rod.
Further, the control device includes motor control module, wireless transport module, power management module, described
Motor control module, wireless transport module, power management module are set in a control cabinet, and the control cabinet is installed on one of them
On the pilum.
Further, the motor control module includes for controlling the first control module of the first motor, being used for
Control the second control module of second motor and third motor.
Further, the supply unit includes the self-powered photovoltaic for being set to one of them or several photovoltaic panel sides
Plate and the accumulator being located therein on a pilum, the self-powered photovoltaic panel charge for the accumulator, the electric power storage
Pond provides power supply for the control device.
The utility model has the following advantages compared with prior art and advantageous effect：
1. the multiple pilum is equipped with rotation axis, active beam is axially provided with along the rotation axis, on the active beam
Laterally it is erected with the first driven beam of array and the second rotation installation from the first driven beam described in foundation, every group and the second driven beam
There are photovoltaic panel and a speculum, the speculum can be on reflected sunlight to photovoltaic panel, and the utility model, which passes through, controls photovoltaic panel
Rotation with speculum adjusts the angle of photovoltaic panel and speculum, to making photovoltaic panel receive direct sunlight to the greatest extent
With speculum reflected light, the generated energy of photovoltaic panel is improved using intensity of illumination is increased, solar energy is taken full advantage of, greatly improves
Solar energy receives amount of radiation, reduces cost of electricity-generating and floor space, and easy to repair and debugging is applicable not only to large-scale power station,
Suitable for distributed power generation.
2. the utility model is to increase photovoltaic panel control system and speculum increasing on the basis of oblique single-axis sun tracking holder
Three axis sun tracking systems of strong control system, the utility model are equipped with for controlling the first motor, the second motor, third electricity
The control device that machine cooperates uses LoRa or NB-loT wireless communications modes between control device and external central controller
Transmitted in both directions wireless signal, the external central controller can send instruction to the control device can acquire the control again
The information of device processed, the problem of capable of finding the control device and each component in time, are convenient for quick-replaceable and repair, wireless control
Mode reduce material cost, improve work efficiency.
Description of the drawings
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is a kind of dimensional structure diagram of three axis synergy holder photovoltaic tracking system.
Fig. 2 is a kind of front view of three axis synergy holder photovoltaic tracking system.
Fig. 3 is a kind of side view of three axis synergy holder photovoltaic tracking system.
Fig. 4 is the partial enlarged view of mirror tilt part in Fig. 1.
Fig. 5 is the partial enlarged view at A in Fig. 1.
Fig. 6 is a kind of principle flow chart of three axis synergy holder photovoltaic tracking system.
Label in above-mentioned figure is：
1, first motor, 110, main frame pull rod, the 2, second motor, 3, third motor, 310, swing component, 4, photovoltaic panel,
5, speculum, 6, main frame, 7, pilum, 8, speculum shackle rod, 9, photovoltaic panel shackle rod, 10, rotation axis 10,11, main
Dynamic beam, the 12, first driven beam, the 13, second driven beam, the 131, second support bar, the 132, second connecting rod, 133, rotating bars, 14,
Accumulator, 15, self-powered photovoltaic panel, 16, control cabinet.
Specific implementation mode
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
The specific implementation process of the utility model is as follows：
As shown in Figures 1 to 5, a kind of three axis synergy holder photovoltaic tracking systems, including be installed on multiple pilums 7
Rotation axis 10, multigroup the be erected on along the active beam 11 that the rotation axis 10 is axially arranged, successively laterally on the active beam
One driven beam 12 and second from foundation 13, for fixing the active beam 11, the first driven beam 12 and second from the masters of foundation 13
Frame 6；
It is rotatably installed with photovoltaic panel 4 and speculum 5 on first driven beam 12 and the second driven beam 13 described in every group；
The pilum 7 be equipped with for pull main frame pull rod 110 that the main frame 6 rotates around the rotation axis 10,
The main frame 6 is equipped with the photovoltaic panel pull rod 9 for pulling the photovoltaic panel 4 to be rotated around the described first driven beam 12 and is used for
The speculum pull rod 8 for pulling the speculum to be rotated from foundation 13 around described second；
The three axis synergy holder photovoltaic tracking system is additionally provided with for driving the main frame pull rod 110, photovoltaic panel to draw
Bar 9, the control device for controlling the driving device, is that the control device carries at the driving device of the movement of speculum pull rod 8
The accumulator of power supply source.
The driving device includes for driving the first motor 1 of the main frame pull rod 110, for driving the photovoltaic
The second motor 1, the third motor 3 for driving the speculum pull rod of plate pull rod, the first motor 1, the second motor 2,
Third motor 3 is electrically connected with the control device.
On the first driven beam, 12 and second driven beam 13 with bearing be connected with multiple first support bar (not shown) and
Multiple second support bars 131, the photovoltaic panel 4 are fixedly installed on the multiple first support bar, and the speculum 5 fixes peace
Loaded on the multiple second support bar 131, the multiple first support bar is connected by head rod (not shown) activity, institute
It states multiple second support bars 131 to be connected by 132 activity of the second connecting rod, one end of multiple head rods is movable successively
It is connected on the photovoltaic panel pull rod 9, one end of second connecting rod 132 is movably connected on successively on speculum pull rod 8.
The main frame pull rod 110 is the lead screw being installed on the pilum 7, and one end of the lead screw is articulated with described turn
On the main frame 6 of 10 side of moving axis, the other end is connected with the first motor 1, and the first motor 1 drives the lead screw to do to stretch
Contracting movement.
Second motor 2 is fixedly installed in third motor 3 on the main frame 6, second motor 2 and third
The swing component 310 for driving the photovoltaic panel pull rod 9 and speculum pull rod 8 to be axially moved, the correspondence are respectively provided on motor 3
One end of swing component 310 is articulated on the photovoltaic panel pull rod 9 and 8 on speculum pull rod.
The control device includes motor control module, wireless transport module, power management module, and the motor controls mould
Block, wireless transport module, power management module are set in a control cabinet 16, and the control cabinet 16 is installed on described in one of them
On pilum 7.
The motor control module includes for controlling the first control module of the first motor, for controlling described
Second control module of two motors and third motor.
The supply unit includes being set to the self-powered photovoltaic panel 15 of one of them or several photovoltaic panel sides and setting
Accumulator 14 on one of them described pilum 7, the self-powered photovoltaic panel 15 charge for the accumulator 14, the storage
Battery 14 provides power supply for the control device.
The concrete operating principle of the utility model is with flow：The multiple pilum 7 is fixedly installed in ground side by side successively
Or on other external fixtures, the multiple pilum 7 supports the rotation axis 10, the rotation axis 10 to be installed by bearing jointly
In, to enable the rotation axis 10 to be rotated relative to the pilum 7, the active beam axis 11 is fixed on the multiple pilum 7
Rotated together relative to the pilum 7 in the rotation axis 10 and with the rotation axis 10, the both ends of the active beam 11 to
North and South direction extends, and described multigroup first is set to the active beam 11 from foundation 12 and second from 13 array-like transverse strands of foundation
On, described multigroup first extends from foundation 12 and second from foundation 13 to east-west direction.Photovoltaic panel 4 on first driven beam 12 with
One is formed between speculum 5 on second driven beam 13 can change the angle of size, to keep sunlight anti-to greatest extent
It is incident upon in the photovoltaic panel 4, the photovoltaic panel 4 can not only absorb the sunlight of direct irradiation, and can absorb described anti-
The sunlight of the reflection of mirror 5 is penetrated, the absorption of double energy makes the photovoltaic panel 4 generate more power generations using its limited area
Amount, improves the efficiency of photovoltaic panel 4.
The main frame 6, active beam 11, the interconnection of 12 and second driven beam 13 of multigroup first driven beam are integrated, when
When the first motor 1 drives the lead screw to do stretching motion, lead screw pull the main frame 6 around the rotation axis 10 eastwards
West is to rotation, to enable the photovoltaic panel 4 and speculum 5 to track solar irradiation in east-west direction.As shown in fig. 6, institute
The side for stating main frame 6 is equipped with multiple rotating bars 133 for pulling the speculum pull rod, the middle part of the rotating bars 133
Rotation is installed on the main frame 6, and one end of the rotating bars is flexibly connected the speculum pull rod 8, and other end activity connects
The mirror connecting rod 132 is connect, similarly, 6 other side of the main frame is equipped with 4 corresponding rotating bars of photovoltaic panel, function one
It causes.As shown in figure 4, one end that the speculum pull rod 8 corresponds to swing component 310 is fixedly connected on the third motor 3, it is another
End is movably connected on speculum pull rod 8, and when the third motor 3 driving swing component 310 is swung, swing component 310 pulls institute
The axial movement of speculum pull rod 8 is stated, meanwhile, speculum pull rod 8 pulls the corresponding rotating bars 123 to rotate, the rotating bars
133 by pulling the second connecting rod 132 that the speculum 5 is pushed to be rotated around second driven shaft 13, when speculum 5 is driven around second
When axis 13 rotates, speculum 5 can track solar irradiation in North and South direction.Similarly, it is right to be equipped with photovoltaic panel pull rod 9 for main frame 6
The rotating bars and swing component answered, structure are consistent with rotating bars, the swing component on speculum 5.Second motor 2 and third motor 3
Optimum angle is formed between speculum 5 and photovoltaic panel 6 described in Collaborative Control, to make the sunlight of 5 limited areal of speculum most
It reflexes in photovoltaic panel 4 on a large scale.It is equipped in the control device for controlling the first motor 1, the second motor 2, the
The controller of three motors, 3 Collaboration, the controller control the first motor 1, the second motor 2, third motor 3 and open respectively
It opens, stop or respectively rotates at different rates, make corresponding driving shaft 11, first driven shaft 12,13 3 axis of second driven shaft
Collaboration rotation, to realize that best angle from motion tracking solar irradiation, improves the utilization rate of day sun energy.Mirror assembly plays
The effect of synergy, the generated energy for improving photovoltaic module into one on the basis of three axis are tracked.Every group first in the present embodiment
The photovoltaic panel 4 of driven shaft 12 is all made of detachable installation with the speculum in second driven shaft 13, with electrically connecting for photovoltaic assembly
It is connected in sectional connection, it can be single when one of them or several photovoltaic panels and speculum break down using modularized design
Only dismounting and change and repair, do not influence the normal power generation of other photovoltaic modulies.In one of them or several photovoltaic panels individually
Equipped with the self-powered photovoltaic panel 15 for charging for the accumulator, the control device passes through self-powered photovoltaic panel 15 and electric power storage
Pond 14 provides power supply, is provided separately with key light photovoltaic generating system, does not influence the whole power generation of main photovoltaic system.
As shown in fig. 6, the motor control module includes the first control module for controlling first motor, for controlling
Second control module of the second motor and third motor, first control module high-power N, PMOS tube and special control
The H bridge dedicated control circuits of chip design, control first motor drive the lead screw stretching motion to keep the main frame 6 between east and west
To rotation, the tracking to the east-west direction of sunlight is realized.Second control module is controlled with microcontroller, using high-power N,
The motor dedicated control circuit that the band 64 of PMOS tube design segments controls the second motor and drives the photovoltaic with third motor respectively
Plate pull rod and the movement of speculum pull rod, make the photovoltaic panel 4 be rotated around first driven shaft 12, keep the speculum driven around second
Axis 13 rotates, and realizes the tracking to sunlight North and South direction.The wireless transport module uses LoRa or NB-loT channel radios
Letter pattern receives the instruction of external central controller, the operation for controlling the first motor, the second motor, third motor.
The power management module by microcontroller and power source special managing chip, come to the filling of the accumulator, put and the charging time, fill
Electric current is managed, so as to the control device stable power-supplying.The external central controller uses large capacity microcontroller,
The illumination gathered data that detection in real time positions warp, latitude, time and sunshine recorder is quickly calculated sunny by algorithm
Elevation angle and azimuth, by LoRa or NB-loT wireless communications modes, and the control device transmitted in both directions wireless signal, both
Instruction adjustment main frame East and West direction solar tracking and photovoltaic panel and the solar tracking of speculum north-south can be sent, while can be acquired described in end again
The information of control device adjusts the state of the control device in time, the problem of can quickly finding the control device, so as to and
When maintenance, more exchange device.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model is not by above-mentioned
The limitation of embodiment, under other any Spirit Essences and principle without departing from the utility model made by change, modify, replace
In generation, simplifies combination, should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (8)
1. a kind of three axis synergy holder photovoltaic tracking systems, it is characterised in that：Including
The rotation axis that is installed on multiple pilums, the active beam being axially arranged along the rotation axis, be laterally erected on successively it is described
The multigroup first driven beam on active beam and second from foundation, for fixing the active beam, the first driven beam and second from
The main frame of beam；
It is rotatably installed with photovoltaic panel and speculum on first driven beam and the second driven beam described in every group；
The pilum is equipped with main frame pull rod, the main frame for pulling the main frame to be rotated around the rotation axis
Equipped with for pull the photovoltaic panel around the photovoltaic panel pull rod of the described first driven beam rotation and for pull the speculum around
The described second speculum pull rod rotated from foundation；
The three axis synergy holder photovoltaic tracking system is additionally provided with for driving the main frame pull rod, photovoltaic panel pull rod, reflection
The driving device of mirror pull rod movement, for the control device provides power supply at the control device for controlling the driving device
Supply unit.
2. three axis synergy holder photovoltaic tracking system according to claim 1, it is characterised in that：The driving device includes
For driving the first motor of the main frame pull rod, the second motor for driving the photovoltaic panel pull rod, for driving
The third motor of speculum pull rod is stated, the first motor, the second motor, third motor are electrically connected with the control device.
3. three axis synergy holder photovoltaic tracking system according to claim 1, it is characterised in that：The first driven beam and
Multiple first support bars are connected with bearing and multiple second support bars, the photovoltaic panel are fixedly installed in institute on second driven beam
It states on multiple first support bars, the speculum is fixedly installed on the multiple second support bar, the multiple first support
Item is connected by head rod activity, and the multiple second support bar is connected by the second connecting rod activity, the head rod
One end be movably connected on successively on the photovoltaic panel pull rod, one end of second connecting rod is movably connected on speculum successively
On pull rod.
4. three axis synergy holder photovoltaic tracking system according to claim 2, it is characterised in that：The main frame pull rod is
One end of the lead screw being installed on the pilum, the lead screw is articulated on the main frame of the rotation axis side, and the other end connects
The first motor is connect, the first motor drives the lead screw to do stretching motion.
5. three axis synergy holder photovoltaic tracking system according to claim 2, it is characterised in that：Second motor and
Three motors are fixedly installed on the main frame, are respectively provided on second motor and third motor for driving the photovoltaic panel
One end of the swing component that pull rod and speculum pull rod are axially moved, the swing component be articulated on the corresponding photovoltaic panel pull rod and
On speculum pull rod.
6. three axis synergy holder photovoltaic tracking system according to claim 2, it is characterised in that：The control device includes
Motor control module, wireless transport module, power management module, the motor control module, wireless transport module, power management
Module is set in a control cabinet, and the control cabinet is installed on one of them described pilum.
7. three axis synergy holder photovoltaic tracking system according to claim 6, it is characterised in that：The motor control module
It include the second control for controlling the first control module of the first motor, for controlling second motor with third motor
Molding block.
8. three axis synergy holder photovoltaic tracking system according to claim 1, it is characterised in that：The supply unit includes
Self-powered photovoltaic panel set on one of them or several photovoltaic panel sides and the electric power storage that is located therein on a pilum
Pond, the self-powered photovoltaic panel charge for the accumulator, and the accumulator provides power supply for the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820002629.3U CN207766221U (en) | 2018-01-02 | 2018-01-02 | A kind of three axis synergy holder photovoltaic tracking systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820002629.3U CN207766221U (en) | 2018-01-02 | 2018-01-02 | A kind of three axis synergy holder photovoltaic tracking systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207766221U true CN207766221U (en) | 2018-08-24 |
Family
ID=63182560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820002629.3U Expired - Fee Related CN207766221U (en) | 2018-01-02 | 2018-01-02 | A kind of three axis synergy holder photovoltaic tracking systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207766221U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092616A (en) * | 2018-01-02 | 2018-05-29 | 深圳市康铨机电有限公司 | A kind of three axis synergy stent photovoltaic tracking systems |
| CN109302134A (en) * | 2018-09-06 | 2019-02-01 | 马肃领 | Photovoltaic board device and photovoltaic generating system |
| CN111101814A (en) * | 2019-12-24 | 2020-05-05 | 沈阳航空航天大学 | A kind of household multifunctional smart window |
-
2018
- 2018-01-02 CN CN201820002629.3U patent/CN207766221U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092616A (en) * | 2018-01-02 | 2018-05-29 | 深圳市康铨机电有限公司 | A kind of three axis synergy stent photovoltaic tracking systems |
| CN109302134A (en) * | 2018-09-06 | 2019-02-01 | 马肃领 | Photovoltaic board device and photovoltaic generating system |
| CN109302134B (en) * | 2018-09-06 | 2024-05-14 | 马肃领 | Photovoltaic panel device and photovoltaic power generation system |
| CN111101814A (en) * | 2019-12-24 | 2020-05-05 | 沈阳航空航天大学 | A kind of household multifunctional smart window |
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Granted publication date: 20180824 |