A test paper continuous sample feeding device

Abstract

The present invention relates to the field of automated office technology, and discloses a test paper continuous sample feeding device, comprising a sample feeding module, an extraction module and a transmission module arranged in sequence, wherein the transmission module is provided with a visual module; the sample feeding module comprises a paper box and a paper pickup wheel arranged on the paper box, wherein the paper box is used to hold stacked test papers, and the end near the extraction module is an open end, and the paper pickup wheel rubs the topmost test paper in the paper box away from the test paper pile; the extraction module and the transmission module are used to separate the test papers by copies, and transmit the test papers to the position of the visual module, and the visual module is used to read the scores of the test papers. The beneficial effects of the present invention are: the test papers can be quickly extracted into separate test papers spaced from each other, and sequentially transmitted to the visual module for scoring and grading of the test papers.

Description

Technical Field

[0001] The invention relates to the technical field of automated office work, and in particular to a test paper continuous sample feeding device. Background Art

[0002] Using paper test papers to assess students is an important way to understand their learning situation. Answer sheet test papers are currently mostly completed using card readers, which can achieve relatively high efficiency, but non-answer sheet test papers are usually scored manually. This is a tedious and delicate job, which is prone to omissions and miscalculations due to lack of concentration. Invention patent application ZL202011137954.9 proposes a method for quickly entering test paper scores based on machine vision technology, which uses machine vision technology to accurately, quickly and economically enter test paper scores. However, this requires cooperation with an automated test paper continuous sample feeding device to perform fully automatic test paper scoring.

[0003] Normally, a test paper consists of multiple pages and is bound together. Multiple test papers are stacked when they are recovered and transported. In order to achieve continuous sample delivery of test papers, multiple test papers need to be quickly decomposed into single test papers and transported to the visual module in sequence. Utility model patent ZL202122795683.2 proposes a printing paper transmission device, which uses a limit block to limit the paper, and a fan to blow on the paper to prevent jamming during paper transmission. The paper is heated by the cooperation of the mounting seat and the heating tube to prevent wrinkles in the paper during transmission. Utility model patent ZL202023090784.1 proposes a paper transmission device for efficient digital printing equipment, which uses a limit plate to prevent large displacement of the paper during transmission, and uses a motor, a rotating shaft, a linkage frame and an ion wind rod to eliminate static electricity on the paper to prevent paper adhesion. However, for the test papers collected after the exam, the paper flatness is not ideal and they are usually bound by multiple pages. The existing technical solutions cannot continuously send samples of such test papers and it is difficult to continuously separate single test papers from the test paper pile for subsequent camera scanning and computer scoring based on image processing. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a test paper continuous sample feeding device, which can sequentially and continuously separate single test papers from a test paper pile for camera scanning and automatic scoring.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A continuous sample feeding device for test papers, comprising a sample feeding module, an extraction module and a transmission module arranged in sequence, wherein a visual module is arranged on the transmission module; the sample feeding module comprises a paper box and a paper pickup wheel arranged on the paper box, wherein the paper box is used to hold stacked test papers, and the end of the paper box near the extraction module is an open end, and the paper pickup wheel pulls the test paper on the top layer in the paper box away from the test paper pile; the extraction module and the transmission module are used to separate the test papers into pieces, and transmit the test papers to the position of the visual module, and the visual module is used to read the scores of the test papers. There is a speed difference between the transmission speed of the transmission module and the transmission speed of the extraction module, and the speed difference between the transmission speed of the transmission module and the transmission speed of the extraction module is used to quickly extract the test papers into separate single test papers spaced from each other, so that the visual module can scan the score reading area on the test paper for scoring and summing.

[0007] Furthermore, the sample feeding module also includes a test paper bottom plate, which is placed on the paper box bottom plate and is used to hold stacked test papers; a bell mouth is provided between the sample feeding module and the extraction module, the large opening of the bell mouth is provided on one side of the sample feeding module, the small opening of the bell mouth is provided on one side of the extraction module, and the inner lower edge of the large opening of the bell mouth is lower than the test paper bottom plate. The bell mouth serves as a transition section between the sample feeding module and the extraction module, and guides the test paper transmission, and the inner lower edge of its large opening is lower than the test paper bottom plate, so that the test paper will not get stuck at the large opening of the bell mouth when it is rubbed away from the test paper pile by the rubbing wheel.

[0008] Preferably, the inner lower edge of the large bell-mouth opening is 1.0 to 2.0 mm lower than the test paper bottom plate, and the inner height range is 4.0 to 6.0 mm; the inner height range of the small bell-mouth opening is 1.5 to 3.0 mm.

[0009] Furthermore, the sample feeding module further comprises a pressure strip, a stopper, a stopper adjustment rod, a paper pickup wheel shaft, a first bearing and a pendulum; the paper box comprises a paper box bottom plate, a paper box side plate and a paper box end plate, the pressure strip is arranged on the paper box end plate away from the extraction module, and the pressure strip is used to press the test paper stored in the paper box; preferably, the pressure strip presses the test paper through a torsion spring. The stopper is arranged on the test paper bottom plate, and is used to position the test paper in the paper box; preferably, the stopper is arranged at the paper box end plate away from the extraction module in the paper box, and is parallel to the paper box end plate; a stopper adjustment rod is arranged between the stopper and the paper box end plate, one end of the stopper adjustment rod is connected to the paper box end plate, and the other end is connected to the stopper, and is used to adjust the position of the stopper, and further realize the positioning of the stopper for test papers of different sizes. The paper pickup wheel is arranged on the paper pickup wheel shaft, and a sample feeding module bearing seat is arranged on the paper box side panel. One end of the pendulum is connected to the sample feeding module bearing seat, and the other end is connected to the paper pickup wheel shaft. Preferably, the pendulum is connected to the paper pickup wheel shaft through a first bearing; further, the first bearing is arranged in an end hole of the pendulum; there are two pendulums, which are symmetrically arranged on both sides of the paper box side panel; a tension spring is arranged on the pendulum to drive the paper pickup wheel to press on the top of the test paper, and when the paper pickup wheel rotates, the top test paper is rubbed away from the test paper pile.

[0010] Furthermore, it also includes a motor fixing plate, and the injection module is connected to the extraction module via the motor fixing plate.

[0011] Furthermore, a third friction wheel is provided at one end of the paper pickup wheel shaft, a second friction wheel is provided below the third friction wheel, and the third friction wheel and the second friction wheel are transmitted in a constant ratio; the second friction wheel is provided on a motor fixing plate, an injection module motor is provided on the motor fixing plate, and a first friction wheel and a first gear are provided on the motor shaft of the injection module motor; the first friction wheel and the second friction wheel are transmitted in a constant ratio.

[0012] Furthermore, the second friction wheel is arranged on the motor fixing plate through a first elastic device, the first elastic device includes a friction wheel frame and a friction wheel frame base, the friction wheel frame is arranged in the friction wheel frame base, a spring is arranged at the bottom of the friction wheel frame base, and the friction wheel frame base provides elastic support for the friction wheel frame through the spring at its bottom, thereby ensuring friction transmission among the second friction wheel, the third friction wheel and the first friction wheel.

[0013] Furthermore, the injection module also includes a limiting wheel, which is arranged on the motor fixing plate and is located on the right side of the second friction wheel to limit the second friction wheel.

[0014] Furthermore, the extraction module includes an upper shell, a lower shell, an extraction module bearing seat, a first main transmission shaft of the extraction module, a second main transmission shaft of the extraction module, a first secondary transmission shaft of the extraction module, a second secondary transmission shaft of the extraction module, an extraction module regulator, a first gear, a second gear, a third gear, a fourth gear, a first synchronous wheel of the extraction module rotates, and a second synchronous wheel of the extraction module rotates; the upper shell and the lower shell are stacked up and down, and an extraction module regulator is respectively provided at one end of the upper shell and the lower shell, the first secondary transmission shaft of the extraction module and the second secondary transmission shaft of the extraction module are respectively arranged in the extraction module regulators in the upper shell and the lower shell, and the first secondary transmission shaft of the extraction module , the second secondary transmission shaft of the extraction module can move horizontally in the corresponding extraction module regulator, and the horizontal position of the first secondary transmission shaft of the extraction module and the second secondary transmission shaft of the extraction module can be adjusted by the extraction module regulator, so as to tighten the first transmission belt and the second transmission belt; the first main transmission shaft of the extraction module and the second main transmission shaft of the extraction module are respectively arranged at the other end of the upper shell and the lower shell; the first main transmission shaft of the extraction module drives the first secondary transmission shaft of the extraction module to rotate through the first transmission belt, and the second main transmission shaft of the extraction module drives the second secondary transmission shaft of the extraction module to rotate through the second transmission belt; the first transmission belt presses the test paper downward under the gravity of the upper shell. The first gear meshes with the second gear, and the second gear is coaxially installed with the first synchronous wheel of the extraction module. The first synchronous wheel of the extraction module drives the second synchronous wheel of the extraction module to rotate through the synchronous belt. The second synchronous wheel of the extraction module is coaxially arranged with a third gear, and the third gear meshes with the fourth gear for transmission; the third gear is coaxially arranged with the second main transmission shaft of the extraction module, and the third gear is coaxially arranged with the first main transmission shaft of the extraction module.

[0015] Furthermore, the extraction module also includes an extraction module bearing seat, and the extraction module bearing seats are respectively arranged in the upper shell and the lower shell, and the first main transmission shaft of the extraction module and the second main transmission shaft of the extraction module are respectively arranged on their own extraction module bearing seats.

[0016] Furthermore, the upper shell is provided with a handle, and the handle is used to open the upper shell for maintenance.

[0017] Furthermore, the linear speed of the circular rotation of the paper pickup wheel in the sample feeding module and the transmission speed of the first transmission belt and the second transmission belt in the extraction module are in a ratio of 1:1, so as to avoid the test paper from being torn during the transmission process.

[0018] Furthermore, the transmission module includes a supporting frame, a main transmission shaft of the transmission module, a secondary transmission shaft of the transmission module, a plate-shaped elastic device, a clamping roller, a clamping wheel, and a transmission module motor; the supporting frame is constructed of profiles, the main transmission shaft of the transmission module and the secondary transmission shaft of the transmission module are respectively arranged at both ends of the transmission module, the main transmission shaft of the transmission module drives the secondary transmission shaft of the transmission module to rotate through the third transmission belt and the fourth transmission belt, the plate-shaped elastic device is higher than the transmission plane of the third transmission belt and the fourth transmission belt, there are several pairs of plate-shaped elastic devices, which are arranged in pairs on the side of the transmission module, and the clamping rollers and the clamping wheels are respectively arranged on the plate-shaped elastic devices arranged in pairs; the clamping rollers and the clamping wheels are used to apply pressure to the test papers transmitted by the transmission module to ensure that the test papers can be reliably transmitted.

[0019] Furthermore, the transmission module also includes a transmission module adjuster, which is fixed to one end of the support frame by a threaded connection; the transmission module adjuster is used to adjust the position of the transmission module secondary transmission shaft, thereby ensuring the tension of the third transmission belt and the fourth transmission belt.

[0020] Furthermore, the transmission module also includes a second bearing, which is arranged on the supporting frame, and both ends of the main transmission shaft of the transmission module are respectively connected to the second bearing.

[0021] Preferably, the transmission module motor is arranged at one end of the transmission module away from the extraction module, and the power of the transmission module motor is transmitted to the main transmission shaft of the transmission module through a synchronous wheel transmission method; driven by the main transmission shaft of the transmission module, the third transmission belt and the fourth transmission belt transport the test paper forward.

[0022] Furthermore, a gap is provided between the third conveyor belt and the fourth conveyor belt, with a spacing of 10 to 30 mm, to assist the signal recognition of the scanning camera.

[0023] Preferably, 9 pairs of plate-shaped elastic devices are installed on the side of the transmission module; the plate-shaped elastic devices are 30-40 mm higher than the plane of the test paper conveyance on the transmission module; clamping rollers are installed on the first pair of plate-shaped elastic devices at the entrance of the transmission module, and the third transmission shaft is installed on the remaining 8 pairs of plate-shaped elastic devices, and clamping wheels are respectively installed on the third transmission shaft.

[0024] Furthermore, the center distance between the clamping roller and the adjacent clamping wheels is 200-260 mm, the center distance between the two groups of clamping wheels closest to the vision module gantry is 250-260 mm, and the center distance between the remaining adjacent groups of clamping wheels is 200-260 mm.

[0025] Furthermore, a support plate is provided inside the third conveyor belt and the fourth conveyor belt, and the support plate is fixed to the support frame by bolts. The support plate is used to support the third conveyor belt and the fourth conveyor belt, and plays an auxiliary supporting role to ensure that the third conveyor belt and the fourth conveyor belt are transmitted close to the horizontal plane, and further improve the scanning accuracy of the visual module.

[0026] Furthermore, the transmission module also includes a U-shaped connector, and the extraction module is connected to the transmission module via the U-shaped connector, the transmission module regulator, and the connecting shaft. The two ends of the left side of the U-shaped connector are respectively connected to the upper shell and the lower shell, and a hole for installing the connecting shaft is opened at the bottom of the right end of the U-shaped connector. A distance of 7 to 10 mm is left between the right end of the U-shaped connector and the left end of the support frame. A hole for installing the connecting shaft is opened at one end of the left side of the transmission module regulator. The connecting shaft is arranged in the holes of the U-shaped connector and the transmission module regulator.

[0027] Furthermore, the plate-shaped elastic device includes an elastic device bearing seat, a bearing seat base, a spring, an elastic device bottom plate, a spring base, a guide column and a guide groove; the elastic device bottom plate is arranged on both sides of the transmission module, the spring base is arranged on the side of the elastic device bottom plate, the bearing seat base is arranged on the upper part of the elastic device bottom plate, the elastic device bearing seat is arranged on the bearing seat base, the lower part of the bearing seat base is arranged with a guide column, the spring base is arranged with a guide groove, the guide groove is arranged with a spring, the two guide columns of the bearing seat base are respectively inserted into the guide groove of the spring base through the spring to form an elastic support, the elastic device bearing seat is connected to the clamping roller or the third transmission shaft, and each pair of elastic device bearing seats is installed with a clamping roller or the third transmission shaft, so as to avoid the test paper being crushed by the clamping roller or the clamping wheel.

[0028] Preferably, the bottom plate of the elastic device is fixed to both sides of the transmission module by threads; the spring base is fixed to the bottom plate of the elastic device by threads; and the top of the bearing seat base is fixed to the bearing seat of the elastic device by threads.

[0029] Furthermore, the transmission speed of the extraction module and the transmission speed of the transmission module Satisfy the equation ,in It is the interval between adjacent test papers on the transmission platform of the transmission module. is the length of the test paper along the transport direction; and Satisfies the inequality: .

[0030] Furthermore, the vision module includes a gantry, a scanning camera and a camera fixing plate; the gantry includes a longitudinal beam and a transverse beam, the longitudinal beam is arranged on the transmission platform of the transmission module, the transverse beam is provided with a camera fixing plate, and the camera fixing plate is provided with a scanning camera.

[0031] Preferably, the gantry is fixedly mounted on the transmission platform of the transmission module by threaded connection. A camera fixing plate is installed on the crossbeam of the gantry by threaded connection. A scanning camera is installed on the camera fixing plate, and the scanning camera scans the test paper below. The height of the scanning camera from the test paper is 30-50 mm.

[0032] Furthermore, it also includes a rack module, the rack module includes a rack and a push rod, the rack is built with profiles, and casters and foot cups are installed at the four corners of the bottom of the rack respectively. The height of the transmission plane of the transmission module from the ground is adjusted by the foot cup to ensure that the height range is 1000-1200 mm; the push rod is a telescopic rod, one end of which is arranged at the bottom of the carton, and the other end is arranged on the rack. Preferably, the connection between the push rod and the carton is 320-380 mm away from the connecting shaft; the connection between the push rod and the carton is 120-180 mm away from the lowest edge of the bottom plate of the carton. The height of the connection between the push rod and the rack from the ground is 500-750 mm. The push rod is electrically controlled to be telescopic, and the length is adjustable within the range of 500-900 mm.

[0033] Furthermore, the sample introduction module also includes a test paper baffle, and the test paper bottom plate is provided with a groove for placing the test paper baffle according to different test paper models, and the test paper baffle is inserted into the groove to limit the two sides of the test paper.

[0034] Furthermore, the paper box is surrounded by a paper box bottom plate, a paper box end plate and two paper box side plates to form a coverless paper box, and the pressure strip is arranged on the paper box end plate.

[0035] Compared with the prior art, the present invention provides a test paper continuous sample feeding device, which has the following beneficial effects:

[0036] (1) The continuous sample feeding device of the present invention can quickly extract the test paper into separate test papers that are spaced apart from each other, and sequentially feed them to the visual module for scoring and grading of the test paper.

[0037] (2) The continuous sample feeding device of the present invention utilizes a structural combination of a pendulum, a tension spring, a first friction wheel, a second friction wheel, and a third friction wheel, so that the user can conveniently lift the paper pickup wheel and place the test paper pile into the paper box. For test paper piles of different heights, the paper pickup wheel can ensure that it is pressed on the top layer of the test paper pile. At the same time, the torque of the sample feeding module motor can be transmitted to the paper pickup wheel through the friction wheel to pull the top test paper away from the test paper pile.

[0038] (3) The continuous sample feeding device of the present invention uses an innovative structure of multiple sets of plate-shaped elastic devices, clamping rollers, transmission shafts, and clamping wheels in the transmission module, so that the clamping rollers and clamping wheels can provide appropriate downward pressure on the test paper, ensuring reliable transmission of the test paper on the transmission platform of the transmission module. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the main structure of the continuous sample feeding device of the present invention;

[0040] Figure 2 Schematic diagram of the power transmission of the injection module and the extraction module Figure 1 ;

[0041] Figure 3 Schematic diagram of the power transmission of the injection module and the extraction module Figure 2 ;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the transmission module in the present invention;

[0043] Figure 5 It is a schematic diagram of the three-dimensional structure of the continuous sample feeding device of the present invention;

[0044] Figure 6 It is a schematic diagram of the elastic device in the present invention;

[0045] Figure 7 It is a schematic diagram of the plate-shaped elastic device of the present invention.

[0046] The meanings of the reference numerals in the figures are:

[0047] 1—Carton end plate; 2—First secondary transmission shaft of extraction module; 3—Extraction module regulator; 4—Upper shell; 5—Extraction module bearing seat; 6—First main transmission shaft of extraction module; 7—Secondary transmission shaft of transmission module; 8—Transmission module regulator; 9—Support frame; 10—Scanning camera; 11—Camera fixing plate; 12—Second synchronous wheel of transmission module; 13—Main transmission shaft of transmission module; 14—First synchronous wheel of transmission module; 15—Transmission module motor; 16—Foot cup; 17— Caster; 18—push rod; 19—second main transmission shaft of extraction module; 20—lower housing; 21—motor fixing plate; 22—second secondary transmission shaft of extraction module; 23—side plate of paper box; 24—bearing seat of injection module; 25—swinging piece; 26—tension spring; 27—second friction wheel; 28—third friction wheel; 29—fourth gear; 30—second synchronous wheel of extraction module; 31—third gear; 32—first synchronous wheel of extraction module; 33—second gear; 34—limiting wheel; 35— First gear; 36—first friction wheel; 37—first elastic device; 37-1—friction wheel frame; 37-2—friction wheel base; 38—injection module motor; 39—handle; 40—first transmission belt; 41—paper pickup wheel; 42—test paper bottom plate; 43—test paper baffle; 42-1—slot; 44—pressing strip; 45—block; 46—block adjustment lever; 47—paper box bottom plate; 48—paper pickup wheel shaft; 49—first bearing; 50—bell mouth; 51—second transmission belt; 52—third transmission belt; 53—support plate; 54—fourth transmission belt; 55—third transmission shaft; 56—pressure wheel; 57—pressure roller; 58—plate-shaped elastic device; 58-1—elastic device bearing seat; 58-2—bearing seat base; 58-3—spring; 58-4—elastic device bottom plate; 58-5—spring base; 58-6—guide groove; 58-7—guide column; 59—frame; 60—second bearing; 61-U-shaped connecting piece; 62—connecting shaft. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0051] like Figure 1 and Figure 5 As shown, the continuous sample feeding device of the test paper of the present invention comprises a sample feeding module, an extraction module and a transmission module which are arranged in sequence, and a visual module is arranged on the transmission module; the sample feeding module comprises a paper box and a paper rubbing wheel 41 arranged on the paper box, the paper box is used to hold the stacked test papers, and its end near the extraction module is an open end, and the paper rubbing wheel 41 rubs the topmost test paper in the paper box away from the test paper pile; the extraction module and the transmission module are used to separate the test papers by copies, and transmit the test papers to the position of the visual module, and the visual module is used to read the scores of the test papers. There is a speed difference between the transmission speed of the transmission module and the transmission speed of the extraction module. The speed difference between the transmission speed of the transmission module and the transmission speed of the extraction module is used to quickly extract the test papers into separate single test papers spaced from each other, so that the visual module can scan the score reading area on the test paper for scoring and grading.

[0052] like Figure 2 and Figure 3As shown, in a specific implementation of this embodiment, the sample feeding module further includes a test paper bottom plate 42, which is placed on the paper box bottom plate 47, and is used to hold stacked test papers; a bell mouth 50 is provided between the sample feeding module and the extraction module, the large opening of the bell mouth 50 is provided on one side of the sample feeding module, the small opening of the bell mouth 50 is provided on one side of the extraction module, and the inner lower edge of the large opening of the bell mouth 50 is lower than the test paper bottom plate 42. The bell mouth 50 serves as a transition section between the sample feeding module and the extraction module, and guides the test paper transmission, and the inner lower edge of its large opening is lower than the test paper bottom plate 42, so that the test paper will not be stuck at the large opening of the bell mouth 50 when the test paper is removed from the test paper pile by the pickup wheel 41.

[0053] In a specific implementation of this embodiment, the lower edge of the large opening of the bell mouth 50 is 1.0 to 2.0 mm lower than the test paper bottom plate 42, and the internal height range is 4.0 to 6.0 mm; the internal height range of the small opening of the bell mouth 50 is 1.5 to 3.0 mm.

[0054] Preferably, the distance between the inner lower edge of the large opening of the bell mouth 50 and the test paper bottom plate 42 is 2.0 mm, and the inner height is 5.0 mm; the inner height of the small opening of the bell mouth 50 is 2.0 mm.

[0055] In a specific implementation of the present embodiment, the sample feeding module further includes a pressure strip 44, a stopper 45, a stopper adjustment rod 46, a pickup wheel shaft 48, a first bearing 49 and a pendulum 25; the paper box includes a paper box end plate 1, a paper box side plate 23 and a paper box bottom plate 47, the pressure strip 44 is arranged on the paper box end plate 1 away from the extraction module, and the pressure strip 44 is used to press the test paper stored in the paper box; the pressure strip 44 presses the test paper through a torsion spring. The stopper 45 is arranged on the test paper bottom plate 42, and is used to position the test paper in the paper box; preferably, the stopper 45 is arranged at the paper box end plate 1 away from the extraction module in the paper box, and is parallel to the paper box end plate 1; a stopper adjustment rod 46 is arranged between the stopper 45 and the paper box end plate 1, one end of the stopper adjustment rod 46 is connected to the paper box end plate 1, and the other end is connected to the stopper 45, and is used to adjust the position of the stopper 45, and further realize the positioning of the stopper 45 for test papers of different sizes. The paper pickup wheel 44 is arranged on the paper pickup wheel shaft 48, and the sample injection module bearing seat 24 is arranged on the paper box side panel 23. One end of the pendulum 25 is connected to the sample injection module bearing seat 24, and the other end is connected to the paper pickup wheel shaft 48. Preferably, the pendulum 25 is connected to the paper pickup wheel shaft 48 through the first bearing 49.

[0056] In a specific implementation of the present embodiment, the first bearing 49 is arranged in the end hole of the pendulum 25; there are two pendulums 25, which are symmetrically arranged on both sides of the paper box side panel 23; a tension spring 26 is arranged on the pendulum 25, which drives the paper pickup wheel 41 to press on the top of the test paper, and when the paper pickup wheel 41 rotates, the top test paper is rubbed away from the test paper pile.

[0057] In a specific implementation of this embodiment, a motor fixing plate 21 is further included, and the injection module is connected to the extraction module via the motor fixing plate 21 .

[0058] In a specific implementation of the present embodiment, a third friction wheel 28 is provided at one end of the paper pickup wheel shaft 48, a second friction wheel 27 is provided below the third friction wheel 28, and the third friction wheel 28 and the second friction wheel 27 are transmitted in an equal ratio; the second friction wheel 27 is provided on the motor fixing plate 21, an injection module motor 38 is provided on the motor fixing plate 21, and a first friction wheel 36 and a first gear 35 are provided on the motor shaft of the injection module motor 38; the first friction wheel 36 and the second friction wheel 27 are transmitted in an equal ratio.

[0059] like Figure 2 and Figure 6 As shown, in a specific implementation of the present embodiment, the second friction wheel 27 is arranged on the motor fixing plate 21 through the first elastic device 37, the first elastic device 37 includes a friction wheel frame 37-1 and a friction wheel frame base 37-2, the friction wheel frame 37-1 is arranged in the friction wheel frame base 37-2, and a spring is arranged at the bottom of the friction wheel frame base 37-2. The friction wheel frame base 37-2 provides elastic support for the friction wheel frame 37-1 through the spring at its bottom, thereby ensuring the friction transmission between the second friction wheel 27 and the third friction wheel 28 and the first friction wheel 36.

[0060] In a specific implementation of the present embodiment, the sample injection module further includes a limiting wheel 34, which is arranged on the motor fixing plate 21 and is located on the right side of the second friction wheel 27 to limit the second friction wheel 27. The second friction wheel 27 is fixed to the motor fixing plate 21 by the first elastic device 37; under the tension of the tension spring 26 and the gravity of the pickup wheel shaft 48 and the pickup wheel 41, and under the elastic force provided by the first elastic device 37 to the second friction wheel 27, the second friction wheel 27 and the first friction wheel 36 can stably perform friction transmission. When a pile of test papers is put in, the pickup wheel shaft 48 needs to be lifted, and the first friction wheel 36 will be separated from the second friction wheel 27. The second friction wheel 27 is subject to the elastic force provided by the first elastic device 37, and the limiting wheel 34 arranged on the right side of the second friction wheel 27 needs to limit the second friction wheel 27.

[0061] like Figure 2 and Figure 3As shown, in a specific implementation of the present embodiment, the extraction module includes an upper shell 4, a lower shell 20, a first main transmission shaft 6 of the extraction module, a second main transmission shaft 19 of the extraction module, a first secondary transmission shaft 2 of the extraction module, a second secondary transmission shaft 22 of the extraction module, an extraction module regulator 3, a first gear 35, a second gear 33, a third gear 31, a fourth gear 29, a first synchronous wheel 32 of the extraction module, and a second synchronous wheel 30 of the extraction module; the upper shell 4 and the lower shell 20 are stacked up and down, and one end of the upper shell 4 and the lower shell 20 is respectively provided with an extraction module regulator 3, the first secondary transmission shaft 2 of the extraction module and the second secondary transmission shaft 22 of the extraction module are respectively arranged in the extraction module regulator 3 in the upper shell 4 and the lower shell 20, and the first secondary transmission shaft 2 of the extraction module is arranged in the extraction module regulator 3 in the upper shell 4 and the lower shell 20. The transmission shaft 2 and the second secondary transmission shaft 22 of the extraction module can move horizontally in the corresponding extraction module regulator 3, and the horizontal positions of the first secondary transmission shaft 2 and the second secondary transmission shaft 22 of the extraction module are adjusted through the extraction module regulator 3, so as to tension the first transmission belt 40 and the second transmission belt 51; the first main transmission shaft 6 of the extraction module and the second main transmission shaft 19 of the extraction module are respectively arranged at the other end of the upper shell 4 and the lower shell 20; the first main transmission shaft 6 of the extraction module drives the first secondary transmission shaft 2 of the extraction module to rotate through the first transmission belt 40, and the second main transmission shaft 19 of the extraction module drives the second secondary transmission shaft 22 of the extraction module to rotate through the second transmission belt 51; the first transmission belt 40 presses the test paper downward under the action of gravity of the upper shell 4. The first gear 35 is meshed with the second gear 33 for transmission, the second gear 33 is coaxially installed with the first synchronous wheel 32 of the extraction module, the first synchronous wheel 32 of the extraction module drives the second synchronous wheel 30 of the extraction module to rotate through a synchronous belt, the second synchronous wheel 30 of the extraction module is coaxially provided with the third gear 31, the third gear 31 is meshed with the fourth gear 29 for transmission; the third gear 31 is coaxially arranged with the second main transmission shaft 19 of the extraction module, and the third gear 31 is coaxially arranged with the first main transmission shaft 6 of the extraction module.

[0062] In a specific implementation of this embodiment, the extraction module also includes an extraction module bearing seat 5, and the extraction module bearing seats 5 are respectively arranged in the upper shell 4 and the lower shell 20, and the extraction module first main transmission shaft 6 and the extraction module second main transmission shaft 19 are respectively arranged on their respective extraction module bearing seats 5.

[0063] like Figure 3 As shown, in a specific implementation of this embodiment, the upper shell 4 is provided with a handle 39, and the handle 39 is used to open the upper shell 4 for maintenance.

[0064] In a specific implementation of this embodiment, the linear speed of the circular rotation of the paper pickup wheel 41 in the sampling module and the transmission speed of the first conveyor belt 40 and the second conveyor belt 51 in the extraction module are in a ratio of 1:1 to prevent the test paper from being torn during transmission.

[0065] like Figure 1 , Figure 4 as well as Figure 5 As shown, in a specific implementation of the present embodiment, the transmission module includes a support frame 9, a main transmission shaft 13 of the transmission module, a secondary transmission shaft 7 of the transmission module, a plate-shaped elastic device 58, a clamping roller 57, a clamping wheel 56, a second bearing 60, a transmission module regulator 8 and a transmission module motor 15 arranged on both sides; the support frame 9 is constructed of profiles, the main transmission shaft 13 of the transmission module and the secondary transmission shaft 7 of the transmission module are respectively arranged at both ends of the transmission module, the main transmission shaft 13 of the transmission module drives the secondary transmission shaft 7 of the transmission module to rotate through the third transmission belt 52 and the fourth transmission belt 54, the plate-shaped elastic device 58 is higher than the transmission plane of the third transmission belt 52 and the fourth transmission belt 54, there are several pairs of plate-shaped elastic devices 58, which are arranged in pairs on the side of the transmission module, and the clamping roller 57 and the clamping wheel 56 are respectively arranged on the plate-shaped elastic device 58 arranged in pairs; the clamping roller 57 and the clamping wheel 56 are used to apply pressure to the test paper transmitted by the transmission module to ensure that the test paper can be reliably transmitted.

[0066] The second bearing 60 is arranged on the support frame 9, and both ends of the transmission module main transmission shaft 13 are respectively connected to the second bearing 60. The transmission module regulator 8 is fixed to one end of the support frame 9 by bolts, and both ends of the transmission module secondary transmission shaft 7 are respectively connected to the transmission module regulator 8. The position of the transmission module secondary transmission shaft 7 is adjusted by the transmission module regulator 8, so as to ensure the tension of the third transmission belt 52 and the fourth transmission belt 54.

[0067] Preferably, the transmission module motor 15 is arranged at one end of the transmission module away from the extraction module, and the motor shaft of the transmission module motor 15 transmits power to the transmission module first synchronization wheel 14 coaxial with the transmission module main drive shaft 13 through the transmission module second synchronization wheel 12 coaxially therewith; driven by the transmission module main drive shaft 13, the third transmission belt 52 and the fourth transmission belt 54 transport the test paper forward.

[0068] In a specific implementation of this embodiment, a gap is provided between the third conveyor belt 52 and the fourth conveyor belt 54, and the spacing is 10-30 mm, to assist the signal recognition of the scanning camera 10. In other embodiments, the spacing is 20 mm.

[0069] Preferably, 9 pairs of plate-shaped elastic devices 58 are installed on the side of the transmission module; the plate-shaped elastic devices 58 are 30-40 mm higher than the plane on which the test paper is transported on the transmission module. In other embodiments, the plate-shaped elastic devices 58 are 35 mm higher than the plane on which the test paper is transported on the transmission module; a clamping roller 57 is installed on the first pair of plate-shaped elastic devices 58 at the entrance of the transmission module, and a third transmission shaft 55 is installed on the remaining 8 pairs of plate-shaped elastic devices 58, and clamping wheels 56 are respectively installed on the third transmission shaft 55.

[0070] In a specific implementation of this embodiment, the center distance between the clamping roller and the adjacent clamping wheel is 200-260 mm. In other embodiments, the center distance between the clamping roller 57 and the adjacent clamping wheel 56 is 220 mm. The center distance between the two groups of clamping wheels closest to the vision module gantry is 250-260 mm, and the center distance between the remaining adjacent groups of clamping wheels is 200-260 mm. In other embodiments, the center distance between the two groups of clamping wheels 56 closest to the vision module gantry is 250 mm, and the center distance between the remaining adjacent groups of clamping wheels 56 is 220 mm.

[0071] In a specific implementation of the present embodiment, a support plate 53 is provided inside the third conveyor belt 52 and the fourth conveyor belt 54. The support plate 53 is fixed to the support frame 9 by bolts. The support plate 53 is used to support the third conveyor belt 52 and the fourth conveyor belt 54, and serves as an auxiliary support to ensure that the transmission platform is approximately horizontal, thereby further improving the scanning accuracy of the visual module.

[0072] In a specific implementation of the present embodiment, the transmission module further includes a U-shaped connector 61, and the extraction module is connected to the transmission module via the U-shaped connector 61, the transmission module regulator 8, and the connecting shaft 62. The two ends of the left side of the U-shaped connector 61 are respectively connected to the upper shell 4 and the lower shell 20, and a hole for installing the connecting shaft 62 is provided at the bottom of the right end of the U-shaped connector 61. A distance of 7 to 10 mm is left between the right end of the U-shaped connector 61 and the left end of the transmission module profile 9. A hole for installing the connecting shaft 62 is provided at one end of the left side of the transmission module regulator 8. The connecting shaft 62 is arranged in the holes of the U-shaped connector 61 and the transmission module regulator 8.

[0073] In other embodiments, a distance of 8 mm is left between the right end of the U-shaped connecting member 61 and the left end of the transmission module profile 9 .

[0074] like Figure 7As shown, in a specific implementation of this embodiment, the plate-shaped elastic device 58 includes an elastic device bearing seat 58-1, a bearing seat base 58-2, a spring 58-3, an elastic device bottom plate 58-4, a spring base 58-5, a guide groove 58-6 and a guide column 58-7; the elastic device bottom plate 58-4 is arranged on both sides of the transmission module, the spring base 58-5 is arranged on the side of the elastic device bottom plate 58-4, and the bearing seat base 58-2 is arranged on the upper part of the elastic device bottom plate 58-4. The bearing seat base 58-2 is provided with an elastic device bearing seat 58-1, the lower part of the bearing seat base 58-2 is provided with a guide column 58-7, the spring base 58-5 is provided with a guide groove 58-6, the guide groove 58-6 is provided with a spring 58-3, the two guide columns 58-7 of the bearing seat base 58-2 respectively pass through the spring 58-3 and are inserted into the guide groove 58-6 of the spring base 58-5 to form an elastic support, and the elastic device bearing seat 58-1 is connected with the clamping roller 57 or the third transmission shaft 55. A clamping roller 57 or the third transmission shaft 55 is installed on each pair of elastic device bearing seats 58-1, so as to prevent the test paper from being crushed to death by the clamping roller 57 or the clamping wheel 56.

[0075] Preferably, the elastic device bottom plate 58-4 is fixed to both sides of the transmission module by threads; the spring base 58-5 is fixed to the elastic device bottom plate 58-4 by threads; and the upper part of the bearing seat base 58-2 is fixed to the elastic device bearing seat 58-1 by threads.

[0076] In a specific implementation of this embodiment, the transmission speed of the extraction module and the transmission speed of the transmission module Satisfy the equation ,in It is the interval between adjacent test papers on the transmission platform of the transmission module. is the length of the test paper along the transport direction; and Satisfies the inequality: .

[0077] like Figure 1 , Figure 4 as well as Figure 5 As shown, in a specific implementation of this embodiment, the vision module includes a gantry, a scanning camera 10 and a camera fixing plate 11; the gantry includes a longitudinal beam and a transverse beam, the longitudinal beam is arranged on the transmission platform of the transmission module, the transverse beam is provided with a camera fixing plate 11, and the camera fixing plate 11 is provided with a scanning camera 10.

[0078] Preferably, the gantry is fixedly mounted on the transmission platform of the transmission module by threaded connection. A camera fixing plate 11 is installed on the crossbeam of the gantry by threaded connection. A scanning camera 10 is installed on the camera fixing plate 11, and the scanning camera 10 scans the test paper below. The height of the scanning camera 10 from the test paper is 50 mm.

[0079] In a specific implementation of the present embodiment, a rack module is also included, the rack module includes a rack 59 and a push rod 18, the rack 59 is a frame 2 built of profiles, and casters 17 and foot cups 16 are respectively installed at the four corners of the bottom of the rack 59, and the height of the transmission plane of the transmission module from the ground is adjusted by the foot cups 16 to ensure that the height range is 1000-1200 mm; the push rod 18 is a telescopic rod, one end of which is arranged at the bottom of the carton, and the other end is arranged on the rack 59. Preferably, the distance between the connection between the push rod 18 and the carton and the connecting shaft 62 is 320-380 mm; the distance between the connection between the push rod 18 and the carton and the lowest edge of the bottom plate of the carton is 120-180 mm. The height between the connection between the push rod 18 and the rack 59 and the ground is 500-750 mm. The push rod 18 is electrically controlled to be telescopic, and the length is adjustable within the range of 500-900 mm.

[0080] In a specific implementation of this embodiment, the sample introduction module also includes a test paper baffle 43. The test paper bottom plate 42 has a groove 42-1 for placing the test paper baffle 43 according to different test paper models. The test paper baffle 43 is inserted into the groove 42-1 to limit the two sides of the test paper.

[0081] In other embodiments, the carton end panels and the carton bottom panel may be integrally formed L-shaped panels.

[0082] The working principle of the present invention is as follows: bound test papers are piled in a paper box, and the test papers are rubbed out of the test paper pile by a paper rubbing wheel 41, and the test papers are guided into the extraction module through a trumpet mouth 50; the test papers are pressed by the first transmission belt 40 of the upper shell 4 of the extraction module; the test papers are quickly extracted into single test papers spaced apart from each other according to the speed difference between the transmission speed of the transmission module and the transmission speed of the extraction module; the clamping roller 57 and the clamping wheel 56 apply downward pressure to the test papers, and at the same time, the elastic force of the plate-shaped elastic device 58 prevents the test papers transmitted by the transmission module from being crushed to death; the test papers pass through the visual module in turn to realize the scoring and conclusion of each test paper.

[0083] It should be noted that, in this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0084] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test paper continuous sample feeding device, characterized in that: It comprises a sample feeding module, an extraction module and a transmission module which are arranged in sequence, and a visual module is arranged on the transmission module; the sample feeding module comprises a paper box and a paper pickup wheel arranged on the paper box, the paper box is used to hold stacked test papers, and its end near the extraction module is an open end, and the paper pickup wheel rubs the top test paper in the paper box away from the test paper pile; the extraction module and the transmission module are used to separate the test papers into pieces, and transmit the test papers to the visual module position, and the visual module is used to read the scores of the test papers; The sample feeding module also includes a test paper bottom plate, which is placed on the paper box bottom plate and is used to hold stacked test papers; a bell mouth is provided between the sample feeding module and the extraction module, wherein the large opening of the bell mouth is provided on one side of the sample feeding module, and the small opening of the bell mouth is provided on one side of the extraction module, and the inner lower edge of the large opening of the bell mouth is lower than the test paper bottom plate; The sample feeding module further comprises a pressure strip, a stopper, a stopper adjustment rod, a paper pickup wheel shaft, a first bearing and a pendulum; the paper box comprises a paper box bottom plate, a paper box side plate and a paper box end plate, the pressure strip is arranged on the paper box end plate away from the extraction module, and the pressure strip is used to press the test paper stored in the paper box; the stopper is arranged on the test paper bottom plate, and is used to position the test paper in the paper box; the paper pickup wheel is arranged on the paper pickup wheel shaft, and the paper box side plate is provided with a sample feeding module bearing seat, one end of the pendulum is connected to the sample feeding module bearing seat, and the other end is connected to the paper pickup wheel shaft; It also includes a motor fixing plate, and the injection module is connected to the extraction module through the motor fixing plate; A third friction wheel is arranged at one end of the pickup wheel shaft, a second friction wheel is arranged below the third friction wheel, and the third friction wheel and the second friction wheel are in a constant ratio transmission; the second friction wheel is arranged on a motor fixing plate, an injection module motor is arranged on the motor fixing plate, and a first friction wheel and a first gear are arranged on the motor shaft of the injection module motor; the first friction wheel and the second friction wheel are in a constant ratio transmission; The second friction wheel is arranged on the motor fixing plate through a first elastic device, the first elastic device comprises a friction wheel frame and a friction wheel frame base, the friction wheel frame is arranged in the friction wheel frame base, and a spring is arranged at the bottom of the friction wheel frame base; The extraction module comprises an upper shell, a lower shell, an extraction module bearing seat, a first main transmission shaft of the extraction module, a second main transmission shaft of the extraction module, a first secondary transmission shaft of the extraction module, a second secondary transmission shaft of the extraction module, an extraction module regulator, a first gear, a second gear, a third gear, a fourth gear, a first synchronous wheel of the extraction module rotates, and a second synchronous wheel of the extraction module rotates; the upper shell and the lower shell are stacked up and down, and an extraction module regulator is respectively provided at one end of the upper shell and the lower shell, and the first secondary transmission shaft of the extraction module and the second secondary transmission shaft of the extraction module are respectively provided in the extraction module regulators in the upper shell and the lower shell, and the first secondary transmission shaft of the extraction module and the second secondary transmission shaft of the extraction module can move horizontally in the corresponding extraction module regulators, thereby tensioning the first transmission belt and the second transmission belt; The first main transmission shaft of the extraction module and the second main transmission shaft of the extraction module are respectively arranged at the other end of the upper shell and the lower shell; the first main transmission shaft of the extraction module drives the first secondary transmission shaft of the extraction module to rotate through the first transmission belt, and the second main transmission shaft of the extraction module drives the second secondary transmission shaft of the extraction module to rotate through the second transmission belt; the first gear is meshed with the second gear for transmission, and the second gear is coaxially installed with the first synchronous wheel of the extraction module, the first synchronous wheel of the extraction module drives the second synchronous wheel of the extraction module to rotate through the synchronous belt, and the second synchronous wheel of the extraction module is coaxially provided with a third gear, and the third gear is meshed with the fourth gear for transmission; the third gear is coaxially arranged with the second main transmission shaft of the extraction module, and the third gear is coaxially arranged with the first main transmission shaft of the extraction module; The transmission speed of the extraction module and the transmission speed of the transmission module Satisfy the equation ,in It is the interval between adjacent test papers on the transmission platform of the transmission module. is the length of the test paper along the transport direction; and Satisfies the inequality: .

2. The test paper continuous sample feeding device according to claim 1, characterized in that: The ratio of the linear speed of the circular rotation of the paper pickup wheel in the sampling module to the transmission speed of the first transmission belt and the second transmission belt in the extraction module is 1:

1.

3. The test paper continuous sample feeding device according to claim 1, characterized in that: The transmission module includes a main transmission shaft of the transmission module, a secondary transmission shaft of the transmission module, a plate-shaped elastic device, a clamping roller, a clamping wheel and a transmission module motor; the main transmission shaft of the transmission module and the secondary transmission shaft of the transmission module are respectively arranged at two ends of the transmission module, and the main transmission shaft of the transmission module drives the secondary transmission shaft of the transmission module to rotate through the third transmission belt and the fourth transmission belt. The plate-shaped elastic device is higher than the transmission plane of the third transmission belt and the fourth transmission belt. There are several pairs of plate-shaped elastic devices, which are arranged in pairs on the side of the transmission module. The clamping rollers and the clamping wheels are respectively arranged on the plate-shaped elastic devices arranged in pairs.

4. The test paper continuous sample feeding device according to claim 3, characterized in that: The plate-shaped elastic device includes an elastic device bearing seat, a bearing seat base, a spring, an elastic device bottom plate, a spring base, a guide column and a guide groove; the elastic device bottom plate is arranged on both sides of the transmission module, the spring base is arranged on the side of the elastic device bottom plate, the bearing seat base is arranged on the upper part of the elastic device bottom plate, the elastic device bearing seat is arranged on the bearing seat base, the guide column is arranged at the lower part of the bearing seat base, the guide groove is arranged on the spring base, and a spring is arranged in the guide groove, and the elastic device bearing seat is connected to a clamping roller or a third transmission shaft.

5. The test paper continuous sample feeding device according to claim 1, characterized in that: The visual module includes a gantry, a scanning camera and a camera fixing plate; the gantry includes a longitudinal beam and a transverse beam, the longitudinal beam is arranged on the transmission platform of the transmission module, the transverse beam is provided with a camera fixing plate, and the camera fixing plate is provided with a scanning camera.

6. The test paper continuous sample feeding device according to claim 1, characterized in that: It also includes a rack module, which includes a frame and a push rod. Casters and foot cups are respectively installed at the four corners of the bottom of the frame; the push rod is a telescopic rod, one end of which is arranged at the bottom of the paper box, and the other end is arranged on the frame.

Images