CN112659149A - Intelligent draft paper distribution device and method for smart campus examinations - Google Patents
Intelligent draft paper distribution device and method for smart campus examinations Download PDFInfo
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- CN112659149A CN112659149A CN202011592952.9A CN202011592952A CN112659149A CN 112659149 A CN112659149 A CN 112659149A CN 202011592952 A CN202011592952 A CN 202011592952A CN 112659149 A CN112659149 A CN 112659149A
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Abstract
The invention discloses a draft paper intelligent distribution device and method for smart campus examinations, and relates to the technical field of smart campuses in the technical field of smart campuses. The invention comprises a box body; a partition board is arranged in the box body, and the box body is divided into a waste manuscript paper storage area and a new manuscript paper storage area through the partition board; two opposite side walls of the box body are respectively provided with a slide rail A; a limiting baffle and a cover plate are arranged on the side wall of one end of the waste straw paper storage area, a moving beam is arranged between the limiting baffle and the cover plate, an electric telescopic rod A is arranged on the bottom side surface of the moving beam, and a vacuum chuck A is arranged at the end part of the electric telescopic rod A; a tray is arranged between the two slide rails A in a matching way; the top of the new draft paper storage area is provided with a top plate, the bottom side surface of the top plate is provided with an electric telescopic rod B, and the end part of the electric telescopic rod B is provided with a vacuum sucker B. The invention realizes the distribution of the draft paper for the examinees needing to add the draft paper in the examination process, meets the examination requirements of the examinees, and meets the requirements of unmanned invigilation.
Description
Technical Field
The invention belongs to the technical field of smart campuses, and particularly relates to a draft paper intelligent distribution device and method for smart campus examinations
Background
The ordinary invigilation mode often lets invigilator and examinee all feel bored, on the one hand, often can appear examinee because invigilator's serious and too nervous circumstances such as performance error, on the other hand, invigilation process needs a large amount of invigilators, causes the consumption of a large amount of manpower and material resources. To solve the problem, chinese patent CN201510369930.9 discloses an unmanned invigilation system, which comprises an examination room identification subsystem, wherein the examination room identification subsystem comprises a camera, an image processing circuit, an identity card identifier and a knife switch device; the output end of the camera is connected with the input end of the image processing circuit, and the output ends of the image processing circuit and the ID card recognizer are connected with the knife switch device. The invention can effectively prevent various cheating means.
However, in the actual examination process, the examinees often use the draft paper, but the existing unmanned invigilation field does not have a special draft paper distribution device, and the draft paper cannot be distributed to the examinees needing to add the draft paper in the examination process.
Disclosure of Invention
The invention aims to provide a draft paper intelligent distribution device and method for smart campus examinations, and aims to solve the problems in the background art.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an intelligent manuscript paper distribution device for an intelligent campus examination, which comprises a movable box body with a rectangular structure; a partition board which is vertically arranged is arranged in the box body, and the partition board is divided into a waste manuscript paper storage area and a new manuscript paper storage area through the partition board; two opposite side walls of the box body are respectively provided with a slide rail A, and two opposite side walls of the waste manuscript paper storage area which is positioned right above the slide rail A are respectively provided with a slide rail B; a limit baffle is arranged on the side wall of one end, away from the new manuscript paper storage area, of the waste manuscript paper storage area, a cover plate is arranged right above the limit baffle, a moving beam is arranged between the limit baffle and the cover plate, two ends of the moving beam are respectively provided with an electric sliding block B capable of sliding along the length direction of a sliding rail B, the bottom side surface of the moving beam is provided with an electric telescopic rod A, and the end part of the electric telescopic rod A is provided with a vacuum chuck A; a tray which can slide along the length direction of the two slide rails A is arranged between the two slide rails A in a matching way, and two sides of the tray are respectively provided with an electric slide block A which can slide along the length direction of the slide rails A; the partition plate is provided with a rectangular opening through which the tray penetrates; a top plate is arranged at the top of the new draft paper storage area, an electric telescopic rod B is arranged on the bottom side surface of the top plate, and a vacuum sucker B is arranged at the end part of the electric telescopic rod B; two sides of the box body under the top plate are respectively provided with a groove plate, opposite sides of the two groove plates are respectively provided with a rectangular channel, a draft paper box is arranged between the two groove plates in a matched mode, and two opposite outer sides of the draft paper box are respectively provided with a rectangular flange which is matched with the rectangular channel to slide.
Furthermore, a plurality of rollers are arranged on the bottom side surface of the box body.
Further, the box is kept away from the one end tip of walking beam and is set up the door opening, it has a switch door to articulate on the door opening.
Furthermore, photosensitive assemblies are respectively arranged on two opposite side walls of the box body;
the photosensitive assembly comprises a box body, a red glass cover plate is arranged at the end part of the opening end of the box body, and a brightness sensor A is arranged in the box body; still including setting up the infrared light transmitting device in examination seat one side, infrared light transmitting device connects power and control button, control button installs on the seat of examination, control button still connects wireless transmitting module.
Further, the LED lamp further comprises a processor, wherein the processor is connected with the wireless receiving module and the brightness sensor A, and the LED lamp further comprises a driving structure which is arranged in the box body and used for driving the roller to rotate.
Furthermore, the upper surface of the tray is provided with a brightness sensor B in a rectangular distribution manner, the upper surface of the tray positioned on one side of any brightness sensor B is also provided with a pressure sensor, and the brightness sensor B and the pressure sensor are both connected with the processor
Further, the processor is further connected with a vacuum chuck A, an electric sliding block B, an electric telescopic rod A, an electric telescopic rod B and a vacuum chuck B.
A manuscript paper dispensing method comprising:
s01, drawing a travel route map of the box body according to the examination seat distribution condition of the examination room;
s02, when the examinee needs the draft paper in the examination, the examinee presses the control button, the power supply is switched on the wireless transmitting module and the infrared transmitting device, and the wireless transmitting module transmits a signal and is received by the line receiving module;
s03, the processor controls the driving structure to drive the roller to rotate, so that the box body is controlled to move along the drawing route map;
s04, when the box body moves to one side of the test seat triggering the control button, infrared light emitted by the infrared light emitting device penetrates through the red glass cover plate to irradiate the box body, and therefore the brightness sensor A detects that brightness changes;
s05, placing the old draft paper on a tray by an examinee, and when the tray detects the right old draft paper, grabbing the old draft paper from the tray and placing the old draft paper into a waste draft paper storage area by controlling the movement of the electric slide block A, the electric slide block B, the electric telescopic rod A and the vacuum chuck A; and simultaneously, the electric slide block B, the electric telescopic rod B and the vacuum chuck B are controlled to grab out new draft paper in the draft paper box and move the new draft paper into the tray.
Further, the S05 specifically includes:
s051, the examinee puts the old draft paper on the tray, the four brightness sensors B detect brightness change signals at the moment, and meanwhile, the four pressure sensors detect pressure signals, and then the judgment is carried out to step S052;
s052, controlling the electric sliding block A to move by the processor, enabling the moving beam to be located right above the tray, and then controlling the electric telescopic rod A and the vacuum chuck A to move to grab the waste draft paper; synchronously controlling the electric telescopic rod B and the vacuum sucker B to grab a new piece of draft paper from the draft paper box;
s053, the processor controls the electric sliding block B to move along the sliding rail A, so that the tray is moved into a new draft paper storage area; then, step S054 is carried out;
s054, controlling the electric telescopic rod A and the vacuum sucker A to release the old draft paper sucked by the vacuum sucker A into a waste draft paper storage area; simultaneously controlling the electric telescopic rod B and the vacuum sucker B to release the new and old draft paper absorbed by the vacuum sucker B onto the tray;
s055, putting the paper to be draft new on a tray, detecting pressure signals by the four pressure sensors at the moment, and then entering S056;
and S056, the processor controls the electric sliding block B to move along the sliding rail A, so that the tray is moved from the new manuscript paper storage area to the waste manuscript paper storage area.
Furthermore, the control button is connected with a controller, and the controller is wirelessly connected with the processor; when the brightness sensor A detects that the brightness changes, the control button is controlled at the moment to disconnect the power supply, the infrared light emitting device and the wireless emitting module.
The invention has the following beneficial effects:
the invention realizes the distribution of the draft paper for the examinees needing to add the draft paper in the examination process, meets the examination requirements of the examinees, meets the requirements of unmanned invigilation, is equipped to unmanned invigilation management, and saves the manpower management resources.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a left-side view structure of an intelligent draft paper dispensing device according to the present invention;
FIG. 2 is a schematic view of the right side view structure of the intelligent draft paper dispensing device of the present invention;
FIG. 3 is a schematic view of the structure of the tray of the present invention;
FIG. 4 is a schematic cross-sectional view of an intelligent document paper dispensing apparatus according to the present invention.
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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-4, the invention relates to an intelligent distribution device for draft paper for smart campus examinations, comprising a movable rectangular box 1; a partition board 11 which is vertically arranged is arranged in the box body 1, and the box body 11 is divided into a waste draft paper storage area 10 and a new draft paper storage area 20 through the partition board 11; two opposite side walls of the box body 1 are respectively provided with a slide rail A13, and two opposite side walls of the waste manuscript paper storage area 10 which is positioned right above the slide rail A13 are respectively provided with a slide rail B14; a limit baffle 18 is arranged on the side wall of one end of the waste manuscript paper storage area 10 far away from the new manuscript paper storage area 20, a cover plate 193 is arranged right above the limit baffle 18, a moving beam 19 is arranged between the limit baffle 18 and the cover plate 193, two ends of the moving beam 19 are respectively provided with an electric slide block B which can slide along the length direction of a slide rail B14, the bottom side surface of the moving beam 19 is provided with an electric telescopic rod A191, and the end part of the electric telescopic rod A191 is provided with a vacuum chuck A192; a tray 2 which can slide along the length direction of the tray is arranged between the two slide rails A13 in a matching way, and two sides of the tray 2 are respectively provided with an electric slide block A which can slide along the length direction of the slide rail A13; the partition board 11 is provided with a rectangular opening 12 for the tray 2 to penetrate through; the top of the new draft paper storage area 20 is provided with a top plate 16, the bottom side surface of the top plate 16 is provided with an electric telescopic rod B161, and the end part of the electric telescopic rod B161 is provided with a vacuum chuck B162; two sides of the box body 1 under the top plate 16 are respectively provided with a groove plate 4, opposite sides of the two groove plates 4 are respectively provided with a rectangular groove 41, a draft paper box 5 is arranged between the two groove plates 4 in a matching way, and two opposite outer sides of the draft paper box 5 are respectively provided with a rectangular flange 51 which is matched with the rectangular groove 41 to slide.
Preferably, the bottom side of the cabinet 1 is provided with a plurality of rollers 15.
Preferably, the end of the box body 1 far away from the movable beam 19 is provided with a door opening 17, and a switch door 171 is hinged on the door opening 17.
Preferably, the two opposite side walls of the box 1 are respectively provided with a photosensitive assembly 3;
the photosensitive assembly 3 comprises a box body, a red glass cover plate is arranged at the end part of the opening end of the box body, and a brightness sensor A is arranged in the box body; the examination seat is characterized by further comprising an infrared light emitting device arranged on one side of the examination seat, the infrared light emitting device is connected with a power supply and a control button, the control button is installed on the examination seat, and the control button is further connected with a wireless emitting module.
Preferably, the device further comprises a processor, wherein the processor is connected with the wireless receiving module and the brightness sensor A, and the device further comprises a driving structure which is arranged in the box body 1 and is used for driving the roller 15 to rotate.
Preferably, a brightness sensor B21 is arranged on the upper surface of the tray 2 in a rectangular distribution, a pressure sensor 22 is arranged on the upper surface of the tray 2 at one side of any brightness sensor B21, and the brightness sensor B21 and the pressure sensor 22 are both connected with the processor
Preferably, the processor is also connected with a vacuum chuck A192, an electric slide block A, an electric slide block B, an electric telescopic rod A191, an electric telescopic rod B161 and a vacuum chuck B162.
A manuscript paper dispensing method comprising:
s01, drawing a travel route map of the box body 1 according to the distribution condition of the examination seats of the examination room;
s02, when the examinee needs the draft paper in the examination, the examinee presses the control button, the power supply is switched on the wireless transmitting module and the infrared transmitting device, and the wireless transmitting module transmits a signal and is received by the line receiving module;
s03, the processor controls the driving structure to drive the roller 15 to rotate, so that the box body 1 is controlled to move along the drawing route map;
s04, when the box body 1 moves to one side of the examination seat triggering the control button, infrared light emitted by the infrared light emitting device penetrates through the red glass cover plate to irradiate the box body, and therefore the brightness sensor A detects that brightness changes;
s05, the examinee puts the old draft paper on the tray 2, and when the tray 2 detects the right old draft paper, the old draft paper is grabbed from the tray 2 and put into the waste draft paper storage area 10 by controlling the movement of the electric slide block A, the electric slide block B, the electric telescopic rod A191 and the vacuum sucker A192; and meanwhile, the electric slide block B, the electric telescopic rod B161 and the vacuum chuck B162 are controlled to take out and move new draft paper in the draft paper box 5 to the tray 2.
Preferably, S05 specifically includes:
s051, the examinee puts the old draft paper on the tray 2, at this time, the four brightness sensors B21 all detect brightness change signals, and at the same time, the four pressure sensors 22 all detect pressure signals, then the judgment is proceeded to step S052;
s052, the processor controls the electric sliding block A to move, so that the moving beam 19 is located right above the tray 2, and then controls the electric telescopic rod A191 and the vacuum chuck A192 to move to grab the waste draft paper; synchronously controlling the electric telescopic rod B161 and the vacuum sucker B162 to grab a new draft paper from the draft paper box 5;
s053, the processor controls the electric slider B to move along the slide rail A13, so that the tray 2 is moved into the new draft paper storage area 20; then, step S054 is carried out;
s054, controlling the electric telescopic rod A191 and the vacuum sucker A192 to release the old draft paper sucked by the vacuum sucker A192 into the waste draft paper storage area 10; simultaneously controlling the electric telescopic rod B161 and the vacuum sucker B162 to release the new and old draft paper sucked by the vacuum sucker B162 to the tray 2;
s055, putting the paper to be draft new on the tray 2, detecting pressure signals by the four pressure sensors 22 at the moment, and then entering step S056;
and S056, the processor controls the electric slide block B to move along the slide rail A13, so that the tray 2 is moved from the new manuscript paper storage area 20 to the waste manuscript paper storage area 10.
Preferably, the control button is connected with the controller, and the controller is wirelessly connected with the processor; when the brightness sensor A detects that the brightness changes, the control button is controlled at the moment to disconnect the power supply, the infrared light emitting device and the wireless emitting module.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The utility model provides a draft paper intelligence dispensing device for wisdom campus examination which characterized in that: comprises a movable box body (1) with a rectangular structure;
a partition plate (11) which is vertically arranged is arranged in the box body (1), and the box body (1) is divided into a waste draft paper storage area (10) and a new draft paper storage area (20) through the partition plate (11);
two opposite side walls of the box body (1) are respectively provided with a slide rail A (13), and two opposite side walls of the waste manuscript paper storage area (10) which is positioned right above the slide rail A (13) are respectively provided with a slide rail B (14);
a limit baffle (18) is arranged on the side wall of one end, away from the new manuscript paper storage area (20), of the waste manuscript paper storage area (10), a cover plate (193) is arranged right above the limit baffle (18), a moving beam (19) is arranged between the limit baffle (18) and the cover plate (193), two ends of the moving beam (19) are respectively provided with an electric slide block B capable of sliding along the length direction of a slide rail B (14), the bottom side surface of the moving beam (19) is provided with an electric telescopic rod A (191), and the end part of the electric telescopic rod A (191) is provided with a vacuum sucker A (192);
a tray (2) capable of sliding along the length direction of the tray is arranged between the two slide rails A (13) in a matching manner, and two sides of the tray (2) are respectively provided with an electric slide block A capable of sliding along the length direction of the slide rails A (13);
the partition plate (11) is provided with a rectangular opening (12) for the tray (2) to penetrate through;
a top plate (16) is arranged at the top of the new draft paper storage area (20), an electric telescopic rod B (161) is arranged on the bottom side surface of the top plate (16), and a vacuum sucker B (162) is arranged at the end part of the electric telescopic rod B (161);
two sides of the box body (1) which is positioned under the top plate (16) are respectively provided with a groove plate (4), opposite sides of the two groove plates (4) are respectively provided with a rectangular channel (41), a draft paper box (5) is arranged between the two groove plates (4) in a matching way, and two opposite outer sides of the draft paper box (5) are respectively provided with a rectangular flanging (51) which is matched with the rectangular channel (41) to slide.
2. The intelligent distribution device for the draft paper for the smart campus study according to claim 2, wherein a plurality of rollers (15) are disposed on the bottom side of the box body (1).
3. The intelligent distribution device for the draft paper for the smart campus study according to claim 3, wherein a door opening (17) is formed at an end portion of the box body (1) far away from the movable beam (19), and an opening and closing door (171) is hinged to the door opening (17).
4. The intelligent distribution device of draft paper for smart campus examinations according to claim 1, wherein the two opposite side walls of the box body (1) are respectively provided with a photosensitive assembly (3);
the photosensitive assembly (3) comprises a box body, a red glass cover plate is arranged at the end part of the opening end of the box body, and a brightness sensor A is arranged in the box body;
still including setting up the infrared light transmitting device in examination seat one side, infrared light transmitting device connects power and control button, control button installs on the seat of examination, control button still connects wireless transmitting module.
5. The intelligent distribution device of draft paper for smart campus examinations according to claim 4, further comprising a processor connected to the wireless receiving module and the brightness sensor A, and further comprising a driving structure disposed in the case (1) for driving the rotation of the roller (15).
6. The intelligent distribution device of draft paper for smart campus examinations according to claim 5, wherein a brightness sensor B (21) is disposed on the upper surface of the tray (2) in a rectangular distribution, a pressure sensor (22) is disposed on the upper surface of the tray (2) on one side of any one of the brightness sensors B (21), and both the brightness sensor B (21) and the pressure sensor (22) are connected to the processor.
7. The intelligent distribution device for draft paper for smart campus examinations according to claim 5, wherein said processor is further connected to vacuum chuck A (192), electric slider A, electric slider B, electric telescopic rod A (191), electric telescopic rod B (161) and vacuum chuck B (162).
8. The method for distributing the draft paper of the intelligent draft paper distributing device for the smart campus study according to any one of claims 1 to 7, comprising:
s01, drawing a travel route map of the box body (1) according to the examination seat distribution condition of the examination room;
s02, when the examinee needs the draft paper in the examination, the examinee presses the control button, the power supply is switched on the wireless transmitting module and the infrared transmitting device, and the wireless transmitting module transmits a signal and is received by the line receiving module;
s03, the processor controls the driving structure to drive the roller (15) to rotate, so that the box body (1) is controlled to move along the drawing route map;
s04, when the box body (1) moves to one side of the test seat triggering the control button, infrared light emitted by the infrared light emitting device penetrates through the red glass cover plate to irradiate the box body, so that the brightness sensor A detects that brightness changes;
s05, the examinee puts the old draft paper on the tray (2), and when the tray (2) detects the right old draft paper, the old draft paper is grabbed from the tray (2) and put into the waste draft paper storage area (10) by controlling the movement of the electric slide block A, the electric slide block B, the electric telescopic rod A (191) and the vacuum sucker A (192); and meanwhile, the electric slide block B, the electric telescopic rod B (161) and the vacuum sucker B (162) are controlled to grab out and move new draft paper in the draft paper box (5) to the tray (2).
9. The method for distributing intelligent draft paper according to claim 8, wherein said S05 specifically comprises:
s051, the examinee puts the old draft paper on the tray (2), at the moment, the four brightness sensors B (21) detect brightness change signals, and meanwhile, the four pressure sensors (22) detect pressure signals, and then the judgment is carried out to step S052;
s052, the processor controls the electric sliding block A to move, so that the moving beam (19) is located right above the tray (2), and then the electric telescopic rod A (191) and the vacuum chuck A (192) are controlled to move to grab the old draft paper; synchronously controlling an electric telescopic rod B (161) and a vacuum sucker B (162) to grab a new draft paper from a draft paper box (5);
s053, the processor controls the electric sliding block B to move along the sliding rail A (13), so that the tray (2) is moved into the new draft paper storage area (20); then, step S054 is carried out;
s054, controlling the electric telescopic rod A (191) and the vacuum sucker A (192) to release the old draft paper sucked by the vacuum sucker A (192) into the waste draft paper storage area (10); simultaneously controlling an electric telescopic rod B (161) and a vacuum sucker B (162) to release the new and old draft paper sucked by the vacuum sucker B (162) to the tray (2);
s055, putting the paper to be draft new on the tray (2), detecting pressure signals by the four pressure sensors (22), and then entering step S056;
s056, the processor controls the electric slide block B to move along the slide rail A (13), so that the tray (2) moves from the new draft paper storage area (20) to the waste draft paper storage area (10).
10. The method for distributing the intelligent draft paper as claimed in claim 8, wherein the control button is connected with a controller, and the controller is wirelessly connected with a processor;
when the brightness sensor A detects that the brightness changes, the control button is controlled at the moment to disconnect the power supply, the infrared light emitting device and the wireless emitting module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011592952.9A CN112659149A (en) | 2020-12-29 | 2020-12-29 | Intelligent draft paper distribution device and method for smart campus examinations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011592952.9A CN112659149A (en) | 2020-12-29 | 2020-12-29 | Intelligent draft paper distribution device and method for smart campus examinations |
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| Publication Number | Publication Date |
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| CN112659149A true CN112659149A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011592952.9A Withdrawn CN112659149A (en) | 2020-12-29 | 2020-12-29 | Intelligent draft paper distribution device and method for smart campus examinations |
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| CN (1) | CN112659149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205640A (en) * | 2021-04-22 | 2021-08-03 | 安徽中屏科技有限公司 | Automatic intelligent receiving and sending device for examination room manuscript paper |
-
2020
- 2020-12-29 CN CN202011592952.9A patent/CN112659149A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205640A (en) * | 2021-04-22 | 2021-08-03 | 安徽中屏科技有限公司 | Automatic intelligent receiving and sending device for examination room manuscript paper |
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Application publication date: 20210416 |