CN114882503A - Filling block recognition device for answer sheet and recognition method thereof - Google Patents
Filling block recognition device for answer sheet and recognition method thereof Download PDFInfo
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- CN114882503A CN114882503A CN202210502668.0A CN202210502668A CN114882503A CN 114882503 A CN114882503 A CN 114882503A CN 202210502668 A CN202210502668 A CN 202210502668A CN 114882503 A CN114882503 A CN 114882503A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/14—Image acquisition
- G06V30/1437—Sensor details, e.g. position, configuration or special lenses
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/40—Document-oriented image-based pattern recognition
- G06V30/42—Document-oriented image-based pattern recognition based on the type of document
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Abstract
The invention provides a filling block recognition device for answer cards, which comprises a workbench, wherein the upper end surface of the workbench is fixedly connected with a recognition device, one side of the upper end surface of the workbench is fixedly connected with a test paper box, the side end surface of one side of the workbench is fixedly connected with a collection box, the workbench comprises a workbench main body, a mounting groove, a conveyor belt, a friction pad and cushion blocks, the mounting groove is formed in the upper end surface of the workbench main body, the conveyor belt is arranged in the workbench main body, the friction pad is fixedly connected to the outer part of the conveyor belt, two groups of the cushion blocks are respectively and fixedly connected to the tops of the front and rear inner walls of the mounting groove, the recognition device comprises a recognition box, recognition grooves, limiting rollers, a recognition plate, a driving motor, an adjusting plate, adjusting grooves, a suction groove, a light transmission groove and metal sheets, and the recognition grooves are formed in the recognition box, meanwhile, answer sheet filling block identification of different types can be used.
Description
Technical Field
The invention relates to the field of answer sheet reading and amending equipment, in particular to a filling block identification device and an identification method for an answer sheet.
Background
After the paper pen examination is finished, the answer sheets which are answered by examinees need to be collected and delivered to an online evaluation system for processing, the online evaluation system scans all the answer sheets by a scanner to identify all options which are filled by the examinees, most of the existing answer sheet filling methods adopt a threshold parameter judgment method, specifically, for example, a certain characteristic parameter threshold is set firstly, then judgment is carried out according to the image characteristics of the filling options, and if the image characteristics are higher than or lower than the parameter threshold, the filling identification result is set as effective filling or invalid filling.
The existing answer sheet identification device needs to manually send answer sheets into a scanner one by one, which can seriously affect the identification efficiency of the answer sheet; meanwhile, because answer sheets produced by different manufacturers have different styles, and the number of objective questions in some examinations is huge, the answer sheet template needs to be manually set before the examination paper is read every time, so that time and labor are wasted, and the use cost is also increased.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a filling block recognition device for an answer sheet, which comprises a workbench, wherein the upper end surface of the workbench is fixedly connected with a recognition device, one side of the upper end surface of the workbench is fixedly connected with a test paper box, the side end surface of one side of the workbench is fixedly connected with a collection box, the workbench comprises a workbench main body, a mounting groove, a conveyor belt, a friction pad and cushion blocks, the mounting groove is formed in the upper end surface of the workbench main body, the conveyor belt is mounted in the workbench main body, the friction pad is fixedly connected to the outer part of the conveyor belt, and two groups of the cushion blocks are respectively and fixedly connected to the tops of the inner walls of the front side and the rear side of the mounting groove;
the identification device comprises an identification box, an identification groove, a limiting roller, an identification plate, a driving motor, an adjusting plate, an adjusting groove, a suction groove, a light transmission groove and a metal sheet, wherein the identification groove is formed in the identification box, the limiting roller is rotatably connected to the inner wall of the identification groove, the identification plate is fixedly connected to the bottom of the inner wall of the identification groove, the light transmission groove is formed in the upper end face of the identification plate, the metal sheet is slidably connected into the light transmission groove, the driving motor is arranged on the inner wall of the identification groove, the adjusting groove is formed in the inner wall of the rear side of the identification groove, the adjusting plate is rotatably connected into the adjusting groove, and the suction groove is formed in the front end face of the adjusting plate;
the test paper box comprises a test paper box main body, a placing groove, a shaping block, a depressurization groove and a fan, wherein the placing groove is formed in the upper end face of the test paper box main body, the shaping block is fixedly connected to the bottom of the inner wall of the placing groove, the depressurization groove is formed in the side end face of one side of the test paper box main body, the fan is fixedly connected to one side of the test paper box main body, and the output end of the fan is aligned to the inside of the depressurization groove;
the collecting box includes the containing box main part, accomodates groove, bearing board, filling layer, guide block, receipts groove and standing groove, accomodate the groove and set up at containing box main part up end, bearing board sliding connection is in accomodating inslot portion, the filling layer is filled and is being accomodate inslot portion, and the filling layer is in the bearing board below, guide block fixed connection is in containing box main part one side, it sets up in containing box main part one side to accomodate the groove, guide cylinder rotates to be connected and is being accomodate inside the groove.
Preferably, the friction pad is made of any one of silica gel and rubber, friction grains are arranged on the surface of the friction pad, and the friction pad and the upper end face of the workbench main body are in the same level.
Preferably, the identification device is arranged above the two groups of cushion blocks on the upper end face of the workbench main body, the upper end faces of the two groups of cushion blocks are flush with the upper end faces of the friction pads, and the identification plate is arranged above the two groups of cushion blocks.
Preferably, a camera is arranged on the top of the identification groove, and the camera is in communication connection with a computer.
Preferably, the output end of the driving motor drives the adjusting plate to rotate through a connecting rod.
Preferably, the front end face of the adjusting plate is the same as the upper end face of the identification plate in size, the position of the suction groove on the front end face of the adjusting plate corresponds to the position of the light transmission groove on the upper end face of the identification plate, and the size of the metal sheet is matched with that of the suction groove.
Preferably, electromagnets are arranged in the suction groove, each group of electromagnets are powered by an independent wire, and the power supply of the electromagnets by the wires is controlled by a PLC (programmable logic controller).
Preferably, the two groups of the shaping blocks are symmetrically and fixedly connected to the bottom of the inner wall of the placing groove, and the upper end surfaces of the shaping blocks are arc-shaped.
As a further preference, the guide block extends into the mounting groove.
Preferably, the filling block identification method for the answer sheet comprises the steps of placing the answer sheet into a placing groove when the answer sheet filling block identification is carried out, enabling the partial area of the answer sheet to be bent under the action of a shaping block, blowing air to the answer sheet in the placing groove by a fan to reduce the pressure of the answer sheet on a friction pad, dragging the answer sheet to move onto a cushion block through the friction pad, enabling the answer sheet to enter the identification device, enabling the answer sheet to be clamped below an identification plate, driving an adjusting plate to rotate and press the identification plate through a driving motor, controlling an electromagnet in a suction groove to work through a PLC (programmable logic controller) controller according to options of standard answers, sucking metal sheets in a answering area above the identification plate into the suction groove, then rotating the adjusting plate to the inside of the adjusting groove through the driving motor, taking a picture of the answer sheet covered on the identification plate through a camera, sending the taken picture to a computer to be compared with the standard answers, the answer sheet is conveyed to the bearing plate in the accommodating groove through the guide block, the accommodating groove and the guide roller, the filling layer is compressed after the answer sheet on the bearing plate has certain weight, the height of the answer sheet falling to the bearing plate through the accommodating groove is not too low or too high, and the answer sheet is always kept to be filled upwards when being collected.
(II) advantageous effects
The invention provides a filling block recognition device for an answer sheet and a recognition method thereof, which have the following beneficial effects:
1. the filling block recognition device for the answer sheet fixes the test paper box on one side of the upper end surface of the workbench, wherein the upper end surface of the workbench is also provided with a conveyor belt, the outside of the conveyor belt is provided with a friction pad, the answer sheet is bent along the track of the shaping block when placed in the placing groove by arranging the shaping block in the test paper box, wherein the answer sheet can be prevented from being arranged in the placing groove, the friction force among the answer sheets is increased through the track of the shaping block, the friction pad is not easy to hold up a plurality of groups of answer sheets by friction force, and the fan is arranged on the front end surface of the test paper box, the fan blows air to a plurality of groups of answer sheets in the placing groove, the ascending force of the air flow can counteract the gravity of partial answer sheets, therefore, even if a plurality of answer sheets are placed in the placing groove, the friction pad can only support one group of answer sheets to come out each time, and the answer sheets are guaranteed to be drawn out one by one.
2. The filling block recognition device for the answer sheet is characterized in that the recognition device is fixedly connected with the upper end face of a workbench, wherein a recognition plate and a regulation plate are arranged in the recognition device, the regulation plate can be wound into a regulation groove or covered on the upper end face of the recognition plate through a driving motor, at least one group of light transmission grooves are formed in the upper end face of the recognition plate, metal sheets are connected in the light transmission grooves in a sliding manner, at least one group of suction grooves are formed in the surface, covered on the upper end face of the recognition plate, of the regulation plate, the regulation plate can be completely pressed on the recognition plate, the suction grooves in the regulation plate correspond to the light transmission grooves in the recognition plate one by one, the light transmission grooves in the recognition plate correspond to the filling block in the answer sheet, electromagnets are arranged in the suction grooves, each group of electromagnets is provided with independent wire power supply, the wire power supply of the electromagnets is controlled by a PLC controller, so that the answer sheet is moved to the lower part of the recognition plate, the PLC is used for controlling the electromagnet inside the suction groove on the position, corresponding to the light-transmitting groove, of the standard answer to be electrified, the electromagnet can suck metal sheets inside the light-transmitting groove corresponding to the standard answer into the suction groove to enable the light-transmitting groove to be vacant, pictures are shot through the camera, the shot pictures are sent to a computer to be compared with the standard answer, recognition of answer sheet filling blocks can be completed, the metal sheets sucked into the suction groove can be adjusted at will along with the position of the standard answer, and recognition of answer sheets of different answers can be adapted.
3. According to the filling block recognition device for the answer sheet, the collection box is arranged, the guide block extends into the installation groove, so that the answer sheet can easily enter the accommodating groove through the guide block, the accommodating groove and the guide roller, the filling layer is made of soft and elastic materials such as sponge, cotton and silk floss, the filling ensures that the height difference between the bearing plate and the accommodating groove cannot be changed too much when the answer sheet is continuously increased on the bearing plate, and the answer sheet can be ensured to face upwards when falling onto the bearing plate, so that the answer sheet is convenient to collect.
Drawings
FIG. 1 is a schematic structural diagram of a filling-in block recognition device for answer sheets according to the present invention;
FIG. 2 is a schematic view of the structure of the working table of the present invention;
FIG. 3 is a schematic cross-sectional view of the identification device of the present invention;
FIG. 4 is a diagram of the relationship between the position of the identification plate and the adjustment plate according to the present invention;
FIG. 5 is a partial sectional view of the test paper box of the present invention;
fig. 6 is a schematic sectional view of the storage box of the present invention.
In the figure: 1 workbench, 2 identification devices, 3 test paper boxes, 4 collection boxes, 5 workbench main bodies, 6 installation grooves, 7 conveyor belts, 8 friction pads, 9 cushion blocks, 10 identification boxes, 11 identification grooves, 12 limiting rollers, 13 identification plates, 14 driving motors, 15 adjusting plates, 16 adjusting grooves, 17 suction grooves, 18 light transmission grooves, 19 metal sheets, 20 test paper box main bodies, 21 placing grooves, 22 shaping blocks, 23 pressure reducing grooves, 24 fans, 25 storage box main bodies, 26 storage grooves, 27 bearing plates, 28 filling layers, 29 guide blocks, 30 storage grooves and 31 guide rollers.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The embodiment of the invention provides a filling block recognition device for answer sheets, which comprises a workbench 1, wherein the upper end surface of the workbench 1 is fixedly connected with a recognition device 2, one side of the upper end surface of the workbench 1 is fixedly connected with a test paper box 3, the side end surface of one side of the workbench 1 is fixedly connected with a collection box 4, the workbench 1 comprises a workbench main body 5, a mounting groove 6, a conveyor belt 7, a friction pad 8 and a cushion block 9, the mounting groove 6 is arranged on the upper end surface of the workbench main body 5, the conveyor belt 7 is arranged in the workbench main body 5, the friction pad 8 is fixedly connected to the outer part of the conveyor belt 7, and two groups of the cushion blocks 9 are respectively and fixedly connected to the tops of the inner walls of the front side and the rear side of the mounting groove 6;
the identification device 2 comprises an identification box 10, an identification groove 11, a limiting roller 12, an identification plate 13, a driving motor 14, an adjusting plate 15, an adjusting groove 16, a suction groove 17, a light transmission groove 18 and a metal sheet 19, wherein the identification groove 11 is formed in the identification box 10, the limiting roller 12 is rotatably connected to the inner wall of the identification groove 11, the identification plate 13 is fixedly connected to the bottom of the inner wall of the identification groove 11, the light transmission groove 18 is formed in the upper end face of the identification plate 13, the metal sheet 19 is slidably connected into the light transmission groove 18, the driving motor 14 is installed on the inner wall of the identification groove 11, the adjusting groove 16 is formed in the inner wall of the rear side of the identification groove 11, the adjusting plate 15 is rotatably connected into the adjusting groove 16, and the suction groove 17 is formed in the front end face of the adjusting plate 15;
the test paper box 3 comprises a test paper box main body 20, a placing groove 21, a shaping block 22, a depressurization groove 23 and a fan 24, wherein the placing groove 21 is formed in the upper end face of the test paper box main body 20, the shaping block 22 is fixedly connected to the bottom of the inner wall of the placing groove 21, the depressurization groove 23 is formed in the end face of one side of the test paper box main body 20, the fan 24 is fixedly connected to one side of the test paper box main body 20, and the output end of the fan 24 is aligned with the depressurization groove 23;
the collecting box 4 comprises a collecting box main body 25, a containing groove 26, a bearing plate 27, a filling layer 28, a guide block 29, a containing groove 30 and a placing groove 21, wherein the containing groove 26 is formed in the upper end face of the collecting box main body 25, the bearing plate 27 is connected to the inside of the containing groove 26 in a sliding mode, the filling layer 28 is filled in the containing groove 26, the filling layer 28 is arranged below the bearing plate 27, the guide block 29 is fixedly connected to one side of the collecting box main body 25, the containing groove 30 is formed in one side of the collecting box main body 25, and a guide roller 31 is connected to the inside of the containing groove 30 in a rotating mode.
In this embodiment, the friction pad 8 is made of any one of silicon rubber or rubber, friction lines are disposed on the surface of the friction pad 8, and the friction pad 8 and the upper end surface of the table main body 5 are at the same level, so that the friction pad 8 is soft enough and has a large friction force.
Specifically, the recognition device 2 is installed on the upper end face of the workbench main body 5 and is located above the two groups of cushion blocks 9, the upper end faces of the two groups of cushion blocks 9 are flush with the upper end face of the friction pad 8, and the recognition plate 13 is arranged above the two groups of cushion blocks 9.
Wherein, the rolling extrusion that answer card can pass through spacing gyro wheel 12 before getting into recognition device 2 inside makes the answer card be a smooth state in recognition board 13 below, and spacing gyro wheel 12 is the plastics material, and the quality rotates easily, can not lead to the fact the resistance to advancing of answer card, is provided with at least a set of light trap 18 on recognition board 13 up end, and when the answer card was in recognition board 13 below, light trap 18 on the recognition board 13 and the filling grid one-to-one on the answer card.
In this embodiment, the top of the identification slot 11 is provided with a camera, and the camera is in communication connection with the computer, and takes a picture of the answer sheet covered by the identification plate 13 through the camera, and then sends the taken picture to the computer to compare with the standard answer, so as to be convenient for quickly identifying the answer.
In this embodiment, as shown in fig. 3 and 4, the output end of the driving motor 14 drives the adjusting plate 15 to rotate through a connecting rod, at least one set of suction slots 17 is formed in the adjusting plate 15, the front end surface of the adjusting plate 15 has the same size as the upper end surface of the identification plate 13, the positions of the suction slots 17 on the front end surface of the adjusting plate 15 correspond to the positions of the light transmission slots 18 on the upper end surface of the identification plate 13, and the size of the metal sheet 19 is matched with the suction slots 17.
Wherein, the adjusting plate 15 can be completely pressed on the identification plate 13 by driving the driving motor 14, and the suction slots 17 on the adjusting plate 15 correspond to the light transmission slots 18 on the identification plate 13 in position one to one.
Furthermore, electromagnets are arranged inside the suction groove 17, each group of electromagnets are powered by an independent wire, and the wire power supply of the electromagnets is controlled by a PLC (programmable logic controller).
The positions of a plurality of groups of light-transmitting grooves 18 corresponding to standard answers on the answer sheet are controlled by the PLC to electrify the electromagnet inside the suction groove 17 on the position of the light-transmitting groove 18 corresponding to the standard answers, the electromagnet can suck a metal sheet 19 inside the light-transmitting groove 18 corresponding to the standard answers into the suction groove 17 to empty the light-transmitting groove 18, a picture is shot by the camera, and the filling block inside the empty light-transmitting groove 18 is not blackened, so that answer errors are described.
In this embodiment, the two sets of the shaped blocks 22 are fixedly connected to the bottom of the inner wall of the placing groove 21, and the upper end surface of the shaped block 22 is arc-shaped, so that the answer sheet can follow the curved track of the shaped block 22 when placed inside the placing groove 21.
Wherein, the inside multiunit answer sheet that can place of standing groove 21, if all place for the level, under the effect of frictional force of friction pad 8 and multiunit answer sheet gravity, more than a set of answer sheet can be taken out to the friction pad 8 once only, just so be not convenient for subsequent filling and scribbling piece discernment, the orbit through shaped block 22 makes the increase of frictional force between the answer sheet each other, and then the friction pad 8 is difficult for asking out multiunit answer sheet with frictional force.
However, if there are too many answer sheets, the pressure of the answer sheet on the friction pad 8 is very large, so that the friction force is very large, and thus, a plurality of sets of answer sheets can be released at one time, therefore, a set of fan 24 is arranged in the middle of the end surface of the test paper box main body 20, the fan 24 blows air to the plurality of sets of answer sheets in the placing groove 21, and the gravity of part of answer sheets is offset through the ascending force of the air flow, so that only one set of answer sheets can be released by the friction pad 8 at a time.
In this embodiment, the guide block 29 extends into the mounting groove 6, so that the answer sheet can easily enter the receiving groove 26 through the guide block 29, the receiving groove 30 and the guide roller 31.
The filling layer 28 may be any soft and elastic material such as sponge, cotton, silk floss, etc., and this filling ensures that the height difference between the supporting board 27 and the receiving slot 30 will not change too much when the answer sheet is continuously enlarged on the supporting board 27, so that the answer sheet is ensured to face upward when falling on the supporting board 27.
The embodiment also provides a filling block identification method for the answer sheet, when the answer sheet is identified, the answer sheet is put into the placing groove 21, the partial area of the answer sheet is bent under the action of the shaped block 22, the fan 24 blows air to the answer sheet in the placing groove 21 to reduce the pressure of the answer sheet on the friction pad 8, the answer sheet is dragged to move to the cushion block 9 through the friction pad 8, the answer sheet enters the identification device 2 at the moment, the answer sheet is clamped below the identification plate 13, the adjusting plate 15 is driven to rotate and press on the identification plate 13 through the driving motor 14, the metal sheet 19 in the case area above the identification plate 13 is sucked into the suction groove 17 through the PLC controller according to the options of the standard answer, then the adjusting plate 15 is rotated to the adjusting groove 16 through the driving motor 14, the answer sheet covered by the identification plate 13 is photographed through the camera, and then sending the shot picture into a computer to be compared with a standard answer, completing the identification of the filling block, then sending the answer sheet to a bearing plate 27 in the accommodating groove 26 through a guide block 29, an accommodating groove 30 and a guide roller 31, compressing a filling layer 28 after the answer sheet on the bearing plate 27 has a certain weight, enabling the height of the answer sheet falling to the bearing plate 27 through the accommodating groove 30 not to be too low or too high, and further keeping the filling face of the answer sheet upward all the time when the answer sheet is collected.
In summary, the filled-in block recognition device for answer sheets and the recognition method thereof provided by the present invention fix the examination paper box 3 on one side of the upper end surface of the working table 1, wherein the upper end surface of the working table 1 is further installed with the conveyor belt 7, the friction pad 8 is arranged outside the conveyor belt 7, the answer sheet is bent following the track of the shaped block 22 when being placed inside the placing groove 21 by arranging the shaped block 22 in the examination paper box 3, wherein the answer sheet is prevented from being placed inside the placing groove 21, the friction force between the answer sheets is increased by the track of the shaped block 22, and further the friction pad 8 is difficult to hold out a plurality of groups of answer sheets by the friction force, and the fan 24 is arranged on the front end surface of the examination paper box 3, the plurality of groups of answer sheets inside the placing groove 21 are blown by the fan 24, the rising force of the air flow can counteract the gravity of a part of answer sheets, so that a plurality of answer sheets are placed inside the placing groove 21, the friction pad 8 can only support one group of answer sheets at a time, thereby ensuring that the answer sheets are drawn out one by one.
Secondly, the recognition device 2 is fixedly connected with the upper end surface of the workbench 1, wherein the recognition device 2 is internally provided with a recognition plate 13 and an adjusting plate 15, the adjusting plate 15 can be wound into an adjusting groove 16 or covered on the upper end surface of the recognition plate 13 through a driving motor 14, the upper end surface of the recognition plate 13 is provided with at least one group of light transmission grooves 18, the inside of each light transmission groove 18 is slidably connected with a metal sheet 19, the surface of the adjusting plate 15 covered on the upper end surface of the recognition plate 13 is provided with at least one group of suction grooves 17, the adjusting plate 15 can be completely pressed on the recognition plate 13, the suction grooves 17 on the adjusting plate 15 correspond to the positions of the light transmission grooves 18 on the recognition plate 13 one by one, the light transmission grooves 18 on the recognition plate 13 correspond to the positions of filling blocks on the answer sheet, electromagnets are arranged inside the suction grooves 17, each group of electromagnets is provided with independent wire power supply, and the wire power supply of the electromagnets is controlled by a PLC controller, the answer sheet is moved to the lower part of the identification plate 13, the PLC controls the electromagnet inside the suction groove 17 at the position of the light transmission groove 18 corresponding to the standard answer to be electrified, the electromagnet can suck the metal sheet 19 inside the light transmission groove 18 corresponding to the standard answer into the suction groove 17, so that the light transmission groove 18 is vacant, a picture is shot through the camera, the shot picture is sent to the computer to be compared with the standard answer, the identification of the answer sheet filling and coating block can be completed, the metal sheet 19 sucked into the suction groove 17 can be randomly adjusted along with the position of the standard answer, and the answer sheet can be identified by adapting to different answers.
Moreover, by arranging the collection box 4, wherein the guide block 29 extends into the installation groove 6, the answer sheet can easily enter the accommodating groove 26 through the guide block 29, the accommodating groove 30 and the guide roller 31, and the filling layer 28 is made of soft and elastic materials such as sponge, cotton and silk floss, so that the height difference between the bearing plate 27 and the accommodating groove 30 cannot be changed too much when the answer sheet is continuously increased on the bearing plate 27, and the answer sheet can be ensured to face upwards when falling on the bearing plate 27, thereby facilitating the collection of the answer sheet.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A fill-in block recognition device for answer sheets, comprising a worktable (1), characterized in that: the automatic detection device comprises a workbench (1), a recognition device (2) and a detection box (3), wherein one side of the upper end face of the workbench (1) is fixedly connected with the detection box (4), one side end face of the workbench (1) is fixedly connected with a collection box (4), the workbench (1) comprises a workbench main body (5), a mounting groove (6), a conveyor belt (7), a friction pad (8) and cushion blocks (9), the mounting groove (6) is formed in the upper end face of the workbench main body (5), the conveyor belt (7) is mounted in the workbench main body (5), the friction pad (8) is fixedly connected to the outer portion of the conveyor belt (7), and two groups of the cushion blocks (9) are fixedly connected to the tops of the inner walls of the front side and the rear side of the mounting groove (6) respectively;
the identification device (2) comprises an identification box (10), an identification groove (11), a limiting roller (12), an identification plate (13), a driving motor (14), an adjusting plate (15), an adjusting groove (16), a suction groove (17), a light transmission groove (18) and a metal sheet (19), wherein the identification groove (11) is arranged inside the identification box (10), the limiting roller (12) is rotatably connected to the inner wall of the identification groove (11), the identification plate (13) is fixedly connected to the bottom of the inner wall of the identification groove (11), the upper end surface of the identification plate (13) is arranged on the light transmission groove (18), the metal sheet (19) is slidably connected inside the light transmission groove (18), the driving motor (14) is arranged on the inner wall of the identification groove (11), the adjusting groove (16) is arranged on the inner wall of the rear side of the identification groove (11), the adjusting plate (15) is rotatably connected inside the adjusting groove (16), the suction groove (17) is formed in the front end face of the adjusting plate (15);
the test paper box (3) comprises a test paper box main body (20), a placing groove (21), a shaping block (22), a depressurization groove (23) and a fan (24), wherein the placing groove (21) is formed in the upper end face of the test paper box main body (20), the shaping block (22) is fixedly connected to the bottom of the inner wall of the placing groove (21), the depressurization groove (23) is formed in the end face of one side of the test paper box main body (20), the fan (24) is fixedly connected to one side of the test paper box main body (20), and the output end of the fan (24) is aligned to the inside of the depressurization groove (23);
collecting box (4) are including containing box main part (25), accomodate groove (26), bearing board (27), filling layer (28), guide block (29), accomodate groove (30) and standing groove (21), accomodate groove (26) and set up at containing box main part (25) up end, bearing board (27) sliding connection is inside accomodating groove (26), filling layer (28) are filled and are being accomodate inside groove (26), and filling layer (28) are in bearing board (27) below, guide block (29) fixed connection is in containing box main part (25) one side, it sets up in containing box main part (25) one side to accomodate groove (30), guide roll (31) rotate to be connected and are being accomodate inside groove (30).
2. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the friction pad (8) is made of any one of silica gel or rubber, friction grains are arranged on the surface of the friction pad (8), and the friction pad (8) and the upper end face of the workbench main body (5) are on the same level.
3. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the identification device (2) is arranged above the upper end face of the workbench main body (5) and is positioned above the two groups of cushion blocks (9), the upper end faces of the two groups of cushion blocks (9) are flush with the upper end face of the friction pad (8), and the identification plate (13) is arranged above the two groups of cushion blocks (9).
4. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the top of the identification groove (11) is provided with a camera which is in communication connection with a computer.
5. A fill-in block recognition device for answer sheets according to claim 1, wherein: the output end of the driving motor (14) drives the adjusting plate (15) to rotate through a connecting rod.
6. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the terminal surface is the same with discernment board (13) up end size before regulating plate (15), inhale the position of groove (17) terminal surface before regulating plate (15) and pass through light groove (18) and correspond in the position of discernment board (13) up end, and the size and the inhaling of sheetmetal (19) groove (17) looks adaptation.
7. A fill-in block recognition device for answer sheets according to claim 6, wherein: electromagnets are arranged inside the suction groove (17), each group of electromagnets are powered by an independent wire, and the power supply of the wires of the electromagnets is controlled by a PLC (programmable logic controller).
8. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the shaping blocks (22) are fixedly connected to the bottom of the inner wall of the placing groove (21) in two groups of symmetry, and the upper end faces of the shaping blocks (22) are arc-shaped.
9. A fill-in block recognition device for an answer sheet according to claim 1, wherein: the guide block (29) extends into the mounting groove (6).
10. A method of identifying a filling-in block for an answer sheet, using the filling-in block identifying apparatus for an answer sheet according to any one of claims 1 to 9, characterized in that: when the answer sheet filling block identification is carried out, the answer sheet is placed in the placing groove (21), the answer sheet is bent in a partial area under the action of the shaping block (22), the fan (24) blows air to the answer sheet in the placing groove (21) to reduce the pressure of the answer sheet on the friction pad (8), the answer sheet is dragged to move to the cushion block (9) through the friction pad (8), the answer sheet enters the identification device (2) at the moment, the answer sheet is clamped below the identification plate (13), the adjusting plate (15) is driven to rotate and press on the identification plate (13) through the driving motor (14), the metal sheet (19) in the answer area above the identification plate (13) is sucked into the suction groove (17) through the electromagnet in the PLC controller control part suction groove (17) according to the options of a standard answer, then the adjusting plate (15) is rotated to the inside the adjusting groove (16) through the driving motor (14), the answer sheet covered by the identification plate (13) is photographed through the camera, the photographed picture is sent to the computer to be compared with a standard answer, identification of the filling block is completed, then the answer sheet is sent to the supporting plate (27) inside the accommodating groove (26) through the guide block (29), the accommodating groove (30) and the guide roller (31), the filling layer (28) can be compressed after the answer sheet on the supporting plate (27) has a certain weight, the height of the answer sheet falling to the supporting plate (27) through the accommodating groove (30) cannot be too low or too high, and the answer sheet is always kept to be filled upwards when being collected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210502668.0A CN114882503B (en) | 2022-05-09 | 2022-05-09 | Filling block identification device for answer sheet and identification method thereof |
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| CN202210502668.0A CN114882503B (en) | 2022-05-09 | 2022-05-09 | Filling block identification device for answer sheet and identification method thereof |
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| CN114882503A true CN114882503A (en) | 2022-08-09 |
| CN114882503B CN114882503B (en) | 2023-07-14 |
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| Publication number | Publication date |
|---|---|
| CN114882503B (en) | 2023-07-14 |
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