CN112671991A

CN112671991A - Scanning device based on OCR technology

Info

Publication number: CN112671991A
Application number: CN202011486094.XA
Authority: CN
Inventors: 陈吉; 李牧; 罗为刚; 汤昌健; 赵飞扬
Original assignee: Chongqing Shuyixin Credit Management Co ltd
Current assignee: Chongqing Shuyixin Credit Management Co ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-16
Anticipated expiration: 2040-12-16
Also published as: CN112671991B

Abstract

The invention belongs to the technical field of OCR, in particular to a scanning device based on OCR technology, which comprises a workbench, wherein a support frame is arranged on the upper side of the workbench, a scanning lens is assembled on the upper side of the support frame, a placing plate is assembled on the upper end of a return mechanism, an air bag is assembled on the inner wall of the lower side of an installation groove, a linkage mechanism connected with the placing plate is respectively arranged on the left side and the right side of a top plate, transparent glass is arranged in the middle of the pressing plate, ejection mechanisms are respectively arranged on the left side and the right side of the pressing plate, an amplifying mirror plate is assembled on the upper ends of the two ejection mechanisms together, a limiting mechanism is arranged between an installation strip and the workbench, and a plurality of spray heads pointing to the lower surface of the transparent glass are arranged on an air storage pipe. Therefore, the amplification degree of the book font is adjusted, and the scanning accuracy is ensured.

Description

Scanning device based on OCR technology

Technical Field

The invention belongs to the technical field of OCR (optical character recognition), and particularly relates to a scanning device based on an OCR technology.

Background

Ocr (optical character recognition) is a process in which an electronic device (e.g., a scanner or a digital camera) checks characters printed on paper and then translates the shapes into computer characters using a character recognition method; namely, the process of scanning the text data, then analyzing and processing the image file and obtaining the character and layout information. How to debug or use auxiliary information to improve recognition accuracy is the most important issue of OCR. The main indicators for measuring the performance of an OCR system are: the rejection rate, the false recognition rate, the recognition speed, the user interface friendliness, the product stability, the usability, the feasibility and the like.

At present, in a library, in order to prevent a book from being damaged and then being unable to find the content of the book, or to facilitate people to watch the book on the internet in an electronic manner, a scanning device with an OCR technology is used to scan the text content in the book into a computer, in order to facilitate the book content to be scanned clearly, the book is placed on a workbench of the scanning device, and a transparent glass plate hinged to the upper side of the workbench presses the surface of the book, so as to compress the surface of the book, and ensure the definition of the scanning, but when the thickness of the book is large, the transparent glass plate can abut against the upper side face of one end, close to the hinged part of the transparent glass plate, of the book, and can not completely compress the surface of the book, so that the definition of the scanning can not be ensured, and many dusts or fibers dropped from the book itself can remain in the book which is relatively long in the present years, and the dusts and fibers can, the scanning precision of later period is influenced, the text content of books with small volume at present is small, the scanning precision is influenced, although most of scanning lenses at present have the zooming function, after the scanning lens is enlarged to a certain degree, the scanning picture can be blurred, the scanning precision is influenced, and the production cost of a scanning device adopting the high-precision scanning lens is also greatly increased.

Disclosure of Invention

The purpose of the invention is: it is intended to provide a scanning device based on OCR technology to solve the problems proposed in the background art.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a scanning device based on OCR technology comprises a workbench, wherein a support frame is arranged on the upper side of the workbench, a scanning lens is assembled on the upper side of the support frame, a display screen is assembled on the support frame, a control panel is assembled on the workbench, the power input end of the control panel is connected with an external power supply, a mounting groove is arranged on the upper side of the workbench, a return mechanism is assembled in the mounting groove, a placing plate is assembled at the upper end of the return mechanism, an air bag is assembled on the inner wall of the lower side of the mounting groove, an air suction pipe extending out of the workbench is assembled on the air bag, a first check valve is assembled on the air suction pipe, a top plate is fixedly connected to the upper side of the air bag, linkage mechanisms connected with the placing plate are arranged on the left side and the right side of the top plate, a pressing, the glass pressing plate comprises a pressing plate and is characterized in that ejection mechanisms are arranged on the left side and the right side of the pressing plate, an amplification mirror plate is assembled at the upper ends of the two ejection mechanisms together, a limiting mechanism is arranged between a mounting bar and a workbench, an air storage pipe is assembled on the mounting bar, a plurality of spray heads pointing to the lower surface of transparent glass are arranged on the air storage pipe, an air outlet pipe connected with an air bag is assembled on the air storage pipe, and a second one-way valve is assembled on.

By adopting the technical scheme, when a worker needs to scan a book, the limiting of the mounting bar can be cancelled through the limiting mechanism, so that the limiting of the pressing plate is cancelled, the pressing plate which is reversely rotated by the worker leaks out of the placing plate, then the book to be scanned can be placed on the upper side of the placing plate, then the pressing plate can be rotated downwards, the transparent glass is pressed against the upper surface of the book until the mounting bar contacts the workbench, the limiting of the mounting bar is carried out through the limiting mechanism, and at the moment, the worker can scan the book through the scanning lens; due to the thickness of the books, the transparent glass compresses the books to drive the placing plate to move downwards, and the placing plate is compressed downwards in the mounting groove through the return mechanism, so that the problem that the scanning precision is influenced because the transparent glass plate is pressed on the oblique side face of the books due to the thick thickness of the books and cannot compress the upper surface of the books can be solved; when the placing plate moves downwards, the top plate is driven to move upwards through the linkage mechanism, the top plate drives the air bag to move upwards, the volume of the air bag is expanded, and the air bag sucks external air into the air bag through the air suction pipe; when workers need to turn pages of books, the limiting mechanism cancels limiting of the mounting strip, the pressing plate can be turned upwards at the moment to turn the pages of the books, when the pressing plate is turned upwards and compression of the books is cancelled, the placing plate is stretched upwards through the return mechanism, when the placing plate moves upwards, the linkage mechanism drives the top plate to move downwards, when the top plate moves downwards, the air bag is extruded, air in the air bag is injected into the air storage pipe through the air outlet pipe, the lower side surface of the transparent glass is cleaned through the plurality of spray heads assembled on the air storage pipe, and fibers and dust in the books are prevented from attaching to the lower surface of the transparent glass plate to influence the scanning precision in the later period; the magnifying mirror plate can magnify the characters of the book, so that the scanning precision is improved; when the fonts in the books are small, the worker can adjust the distance between the magnifying mirror plate and the transparent glass through the ejection mechanism, so that the magnifying degree of the fonts of the books is adjusted, and the scanning accuracy is ensured; the transparent glass plate has a simple structure and a reasonable design, can prevent the transparent glass plate from being pressed on the inclined side surface of a book due to the fact that the book is thick and cannot be pressed on the upper surface of the book, scanning accuracy is affected, the lower side surface of the transparent glass is cleaned by the plurality of nozzles assembled on the gas storage pipe, fibers and dust in the book are prevented from being attached to the lower surface of the transparent glass plate, the characters of the book can be amplified by the amplifying mirror plate, and the distance between the amplifying mirror plate and the transparent glass can be adjusted through the ejection mechanism, so that the amplifying degree of the characters of the book is adjusted, and the scanning accuracy is guaranteed.

Further inject, return mechanism is including a plurality of telescopic links, and is a plurality of both ends respectively with place board and mounting groove bottom fixed connection about the telescopic link, a plurality of the telescopic link all is equipped with the spring. Such structure, cooperate when spring and telescopic link, the realization is to placing the board and compress downwards and reset.

Further limited, the linkage mechanism comprises a first rack, a second rack and a gear, the first rack is fixedly connected with the top plate, the second rack is fixedly connected with the placing plate, the first rack and the second rack are arranged oppositely, the gear is rotatably assembled in the mounting groove, and the gear is positioned between the first rack and the second rack and is meshed with the first rack and the second rack. The structure drives the second rack to move downwards when the placing plate is compressed downwards, the second rack drives the gear to rotate, the rack drives the first rack to move upwards, the first rack drives the top plate to move upwards when moving upwards, the upper end of the air bag is driven to move upwards when the top plate moves upwards, the inner space of the air bag is enlarged, the air bag sucks outside air into the air bag through the air suction pipe, and when the placing plate is reset, the second rack moves upwards, the first rack is driven to move downwards through the gear, so that the top plate is driven to move downwards, the air bag is extruded, air inside the air bag is sprayed out from the air outlet pipe, the lower surface of the transparent glass plate is blown, and the transparent glass plate is cleaned.

Further inject, ejection mechanism is including the rotary trough, the rotary trough internal rotation is equipped with the bull stick, the bull stick left and right sides is equipped with first screw thread section and second screw thread section respectively, first screw thread section and second screw thread section screw thread opposite direction, first screw thread section and second screw thread section equal threaded connection have with rotary trough assorted slider, two the slider upside all articulates there is the bracing piece, two bracing piece upper end is articulated with both ends around the clamp plate respectively, be equipped with in the mounting bar with two ejection mechanism's bull stick assorted transmission assembly. When the rotating rod rotates forwards, the first thread section and the second thread section are driven to rotate in opposite directions, and the first thread section and the second thread section are in threaded connection with the sliding blocks, so that the two sliding blocks are close to each other, the two sliding blocks drive the two supporting rods to rotate, the amplification mirror plate is ejected upwards, when the rotating rod rotates reversely, the two sliding blocks are driven to be away from each other in the same way, the amplification mirror plate moves downwards, and the transmission assembly can drive the rotating rods of the two ejection mechanisms to rotate simultaneously.

Further inject, transmission assembly is including two first skewed teeth, two second skewed teeth, a pivot and a rotation handle, be equipped with the inner chamber in the mounting bar, two first skewed teeth respectively with two ejection mechanism's bull stick fixed connection, the pivot is rotated the assembly and is equipped with the inner chamber in, pivot and two second skewed teeth fixed connection, two the second skewed teeth meshes with two first skewed teeth respectively, pivot one end is stretched out the mounting bar and is connected with the rotation handle. The staff can rotate the rotation handle, drives the pivot and rotates, and the pivot drives two second skewed teeth and rotates, and the second skewed tooth drives first skewed tooth and rotates, and first skewed tooth drives the bull stick and rotates.

Further, the surface of the rotating handle is provided with patterns. With the structure, the rotating handle is convenient for workers to rotate.

Further inject, stop gear is including electro-magnet and ironbar, ironbar and workstation fixed connection, electro-magnet and mounting bar downside fixed connection, electro-magnet and ironbar position phase-match, the mounting bar is equipped with the handle, the handle is equipped with control switch, control switch power input end is connected with control panel power output end electricity, control switch power output end is connected with electro-magnet power input end electricity. Such structure, control panel supplies power for control switch, and control switch supplies power for the electro-magnet, contacts with the workstation upside when the clamp plate, and the mounting bar falls on the workstation upside, and the electro-magnet adsorbs the ironbar, thereby carry on spacingly to the clamp plate, guarantee to flattening of books, when the staff upwards rotates the clamp plate, the handle can be held to the staff, and press control switch, the cancellation is to the power supply of electro-magnet, the electro-magnet cancellation is to the absorption of ironbar, thereby the cancellation is spacing to the clamp plate.

Further inject, the support frame upside is equipped with the light filling lamp, light filling lamp power input end is connected with control panel power output end electricity. With the structure, the light supplement lamp is convenient for workers to supplement light for books.

Compared with the prior art, the invention has the following advantages:

the transparent glass plate has a simple structure and a reasonable design, can prevent the transparent glass plate from being pressed on the inclined side surface of a book due to the fact that the book is thick and cannot be pressed on the upper surface of the book, scanning accuracy is affected, the lower side surface of the transparent glass is cleaned by the plurality of nozzles assembled on the gas storage pipe, fibers and dust in the book are prevented from being attached to the lower surface of the transparent glass plate, the characters of the book can be amplified by the amplifying mirror plate, and the distance between the amplifying mirror plate and the transparent glass can be adjusted through the ejection mechanism, so that the amplifying degree of the characters of the book is adjusted, and the scanning accuracy is guaranteed.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a first schematic structural diagram of an embodiment of a scanning apparatus based on OCR technology according to the present invention;

FIG. 2 is a schematic cross-sectional view of an exemplary embodiment of a scanning apparatus based on OCR technology;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic cross-sectional view of an installation bar of an embodiment of a scanning device based on OCR technology according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a scanning apparatus based on OCR technology according to the present invention;

the main element symbols are as follows:

the air bag air-conditioner comprises a workbench 1, a support frame 11, a light supplement lamp 110, a scanning lens 12, a display screen 13, a control panel 14, a mounting groove 15, a placing plate 16, an air bag 2, an air suction pipe 21, a first one-way valve 22, a top plate 23, a pressing plate 3, transparent glass 31, a mounting bar 32, an amplifying mirror plate 33, an air storage pipe 34, a spray head 35, an air outlet pipe 36, a second one-way valve 37, an expansion rod 4, a spring 41, a first rack 42, a second rack 43, a gear 44, a rotary groove 5, a rotary rod 51, a first thread section 52, a second thread section 53, a sliding block 54, a support rod 55, a first helical tooth 6, a second helical tooth 61, a rotary shaft 62, a rotary handle 63, an inner cavity 64, an electromagnet 65, an iron bar 66.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1-5, the scanning device based on OCR technology of the present invention includes a workbench 1, a support frame 11 is disposed on an upper side of the workbench 1, a scanning lens 12 is disposed on an upper side of the support frame 11, a display 13 is disposed on the support frame 11, a control panel 14 is disposed on the workbench 1, a power input end of the control panel 14 is connected to an external power source, a mounting groove 15 is disposed on the upper side of the workbench 1, a return mechanism is disposed on the mounting groove 15, a placing plate 16 is disposed on an upper end of the return mechanism, an airbag 2 is disposed on an inner wall of a lower side of the mounting groove 15, the airbag 2 is disposed with an air suction pipe 21 extending out of the workbench 1, the air suction pipe 21 is disposed with a first one-way valve 22, a top plate 23 is fixedly connected to an upper side of the airbag 2, linkage mechanisms connected to the placing plate, the clamp plate 3 is far away from articulated one end fixedly connected with mounting bar 32, the 3 left and right sides of clamp plate all are equipped with ejection mechanism, two ejection mechanism upper ends are equipped with an amplifier mirror plate 33 jointly, be equipped with stop gear between mounting bar 32 and the workstation 1, the mounting bar 32 is equipped with gas bomb 34, gas bomb 34 is equipped with the shower nozzle 35 of a plurality of directional transparent glass 31 lower surfaces, gas bomb 34 is equipped with the outlet duct 36 that is connected with gasbag 2, outlet duct 36 is equipped with second check valve 37.

By adopting the technical scheme of the invention, when a worker needs to scan a book, the limit of the mounting bar 32 can be cancelled through the limiting mechanism, so that the limit of the pressing plate 3 is cancelled, at the moment, the pressing plate 3 which is reversely rotated by the worker leaks out of the placing plate 16, then, the book which needs to be scanned can be placed on the upper side of the placing plate 16, then, the pressing plate 3 can be rotated downwards, the transparent glass 31 is tightly pressed on the upper surface of the book until the mounting bar 32 contacts the workbench 1, the limiting mechanism is used for limiting the mounting bar 32, and at the moment, the worker can scan the book through the scanning lens; due to the thickness of the books, the transparent glass 31 compresses the books to drive the placing plate 16 to move downwards, and the placing plate 16 is compressed downwards in the mounting groove 15 through the return mechanism, so that the problem that the scanning precision is influenced because the transparent glass plate 31 is pressed on the oblique side surface of the books due to the thick thickness of the books and cannot compress the upper surface of the books is solved; when the placing plate 16 moves downwards, the top plate 23 is driven to move upwards through the linkage mechanism, the top plate 23 drives the upper side of the air bag 2 to move upwards, the volume of the air bag 2 is expanded, and the air bag 2 sucks the outside air into the air bag 2 through the air suction pipe 21; when a worker needs to turn pages of a book, the limiting mechanism cancels the limiting on the mounting strip 32, the pressing plate 3 can be turned upwards at the moment to turn the pages of the book, when the pressing plate 3 is turned upwards and the pressing on the book is cancelled, the placing plate 16 extends upwards through the return mechanism, when the placing plate 16 moves upwards, the linkage mechanism drives the top plate 23 to move downwards, when the top plate 23 moves downwards, the air bag 2 is extruded, air in the air bag 2 is injected into the air storage pipe 34 through the air outlet pipe 36, the lower side surface of the transparent glass 31 is cleaned by the plurality of spray heads 35 assembled on the air storage pipe 34, and the situation that fibers and dust in the book are attached to the lower surface of the transparent glass plate 31 to influence the scanning precision in the later period is avoided; the magnifying mirror plate 33 can magnify the characters of the book, so that the scanning precision is increased; when the fonts in the books are small, the worker can adjust the distance between the magnifying mirror plate 33 and the transparent glass 31 through the ejection mechanism, so that the magnifying degree of the fonts of the books is adjusted, and the scanning accuracy is ensured; the invention has simple structure and reasonable design, can prevent the transparent glass plate 31 from being pressed on the inclined side surface of the book due to the thicker thickness of the book, and can not press the upper surface of the book to influence the scanning precision, the plurality of nozzles 35 assembled on the gas storage pipe 34 clean the lower side surface of the transparent glass plate 31 to prevent fibers and dust in the book from attaching to the lower surface of the transparent glass plate 31, the magnifying mirror plate 33 can magnify characters of the book, and the distance between the magnifying mirror plate 33 and the transparent glass plate 31 can be adjusted through the ejection mechanism, so that the magnifying degree of the fonts of the book can be adjusted, and the scanning precision can be ensured.

Preferably, return mechanism is including a plurality of telescopic links 4, and both ends are respectively with placing board 16 and mounting groove 15 bottom fixed connection about a plurality of telescopic links 4, and a plurality of telescopic links 4 all overlap and are equipped with spring 41. With the structure, when the spring 41 is matched with the telescopic rod 4, the placing plate 16 is compressed downwards and reset. In fact, other structures may be used to compress and reposition the placement plate 16 downward, as the case may be.

Preferably, the linkage mechanism comprises a first rack 42, a second rack 43 and a gear 44, wherein the first rack 42 is fixedly connected with the top plate 23, the second rack 43 is fixedly connected with the placing plate 16, the first rack 42 and the second rack 43 are oppositely arranged, the gear 44 is rotatably assembled in the mounting groove 15, and the gear 44 is positioned between the first rack 42 and the second rack 43 and is meshed with the first rack 42 and the second rack 43. Such a structure, when placing the board 16 and compressing downwards, drive second rack 43 and remove downwards, second rack 43 drives gear 44 and rotates, rack 44 drives first rack 42 and removes upwards, drive roof 23 and remove upwards when first rack 42 removes upwards, roof 23 removes upwards, drive gasbag 2 upper end and remove upwards, enlarge the inner space of gasbag 2, gasbag 2 inhales the external air in gasbag 2 through breathing pipe 21, when placing the board 16 and reseing, with the same reason, second rack 43 removes upwards, drive first rack 42 and remove downwards through gear 44, thereby drive roof 23 and remove downwards, thereby extrude gasbag 2, spout the air in gasbag 2 from outlet duct 36. In fact, other structures can be considered according to the specific situation, when the placing plate 16 is compressed downward to drive the top plate 23 to move upward, and when the top plate 23 moves upward, the upper end of the airbag 2 is driven to move upward to expand the inner space of the airbag 2, the airbag 2 sucks the outside air into the airbag 2 through the air suction pipe 21, and when the placing plate 16 is reset, the top plate 23 is driven to move downward, so that the airbag 2 is squeezed, and the air in the airbag 2 is ejected from the air outlet pipe 36.

Preferably, ejection mechanism is including revolving

chute

5, 5 internal rotations in revolving chute are equipped with bull stick 51, the bull stick 51 left and right sides is equipped with first screw thread section 52 and second screw thread section 53 respectively, first screw thread section 52 and second screw thread section 53 screw thread opposite direction, first screw thread section 52 and the equal threaded connection of second screw thread section 53 have with revolving chute 5 assorted slider 54, two slider 54 upsides all articulate there is the bracing piece 55, two bracing piece 55 upper ends are articulated with both ends around the clamp plate 3 respectively, be equipped with in the mounting bar 32 with two ejection mechanism's bull stick 51 assorted transmission assembly. With such a structure, when the rotating rod 51 rotates in the forward direction, the first threaded section 52 and the second threaded section 53 are driven to rotate in opposite directions, and because the first threaded section 52 and the second threaded section 53 are both in threaded connection with the sliding blocks 54, the two sliding blocks 54 are close to each other, the two sliding blocks 54 drive the two supporting rods 55 to rotate, so that the amplification mirror plate 33 is ejected upwards, when the rotating rod 51 rotates in the reverse direction, in the same way as above, the two sliding blocks 54 are driven to be away from each other, so that the amplification mirror plate 33 moves downwards, and the transmission assembly can simultaneously drive the rotating rods 51 of the two ejection mechanisms to rotate. In fact, other structures can be used to move the mirror plate 33 up and down according to the specific situation.

Preferably, the transmission assembly comprises two first helical teeth 6, two second helical teeth 61, a rotating shaft 62 and a rotating handle 63, an inner cavity 64 is arranged in the mounting bar 32, the two first helical teeth 6 are respectively and fixedly connected with the rotating rods 51 of the two ejection mechanisms, the rotating shaft 62 is rotatably assembled in the inner cavity 64, the rotating shaft 62 is fixedly connected with the two second helical teeth 61, the two second helical teeth 61 are respectively engaged with the two first helical teeth 6, and one end of the rotating shaft 62 extends out of the mounting bar 32 and is connected with the rotating handle 63. The staff can rotate the handle 63, drive the pivot 62 and rotate, and the pivot 62 drives two second skewed teeth 61 and rotates, and second skewed tooth 61 drives first skewed tooth 6 and rotates, and first skewed tooth 6 drives bull stick 51 and rotates. In fact, other structures can be considered according to the specific situation, and the two rotating rods 51 can be driven to rotate at the same time.

Preferably, the surface of the rotating handle 63 is provided with a pattern. With such a structure, it is convenient for the worker to rotate the turning handle 63. In fact, other configurations are contemplated as appropriate to facilitate rotation of the twist grip 63 by the operator.

Preferably, stop gear is including electro-magnet 65 and ironbar 66, ironbar 66 and 1 fixed connection of workstation, electro-magnet 65 and mounting bar 32 downside fixed connection, electro-magnet 65 and the position phase-match of ironbar 66, mounting bar 32 is equipped with handle 67, handle 67 is equipped with control switch 68, control switch 68 power input end is connected with 14 power output ends of control panel electricity, control switch 68 power output end is connected with electro-magnet 65 power input end electricity. Such structure, control panel 14 supplies power for control switch 68, control switch 68 supplies power for electro-magnet 65, contact with workstation 1 upside when clamp plate 3, mounting bar 32 falls on workstation 1 upside, electro-magnet 65 adsorbs ironbar 66, thereby spacing clamp plate 3, guarantee to flattening of books, when the staff upwards rotates clamp plate 3, the staff can hold handle 67, and press control switch 68, the cancellation is to the power supply of electro-magnet 65, electro-magnet 65 cancels the absorption to ironbar 66, thereby the cancellation is to clamp plate 3 spacing. In fact, other structures can be considered according to specific situations to limit the pressure plate 3.

Preferably, a light supplement lamp 110 is arranged on the upper side of the support frame 11, and a power input end of the light supplement lamp 110 is electrically connected with a power output end of the control panel 14. With the structure, the light supplement lamp 110 is convenient for workers to supplement light for books. In fact, other structures can be considered according to specific conditions, so that workers can conveniently supplement light to books, and the cleaning degree of scanning is guaranteed.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a scanning device based on OCR technique, includes workstation (1), workstation (1) upside is equipped with support frame (11), support frame (11) upside is equipped with scanning lens (12), support frame (11) are equipped with display screen (13), workstation (1) is equipped with control panel (14), control panel (14) power input end is connected with external power supply, its characterized in that: the automatic air suction device is characterized in that a mounting groove (15) is arranged on the upper side of the workbench (1), a return mechanism is assembled on the mounting groove (15), a placing plate (16) is assembled on the upper end of the return mechanism, an air bag (2) is assembled on the inner wall of the lower side of the mounting groove (15), an air suction pipe (21) extending out of the workbench (1) is assembled on the air bag (2), a first one-way valve (22) is assembled on the air suction pipe (21), a top plate (23) is fixedly connected to the upper side of the air bag (2), linkage mechanisms connected with the placing plate (16) are arranged on the left side and the right side of the top plate (23), a pressing plate (3) matched with the placing plate (16) is hinged to the upper side of the workbench (1), transparent glass (31) is arranged in the middle of the pressing plate (3), one end of the pressing, the upper ends of the two ejection mechanisms are jointly assembled with an amplification mirror plate (33), a limiting mechanism is arranged between the mounting bar (32) and the workbench (1), the mounting bar (32) is assembled with a gas storage pipe (34), the gas storage pipe (34) is provided with a plurality of nozzles (35) pointing to the lower surface of the transparent glass (31), the gas storage pipe (34) is assembled with a gas outlet pipe (36) connected with the air bag (2), and the gas outlet pipe (36) is assembled with a second one-way valve (37).

2. An OCR technology based scanning apparatus as recited in claim 1 wherein: the return mechanism comprises a plurality of telescopic rods (4), the upper ends and the lower ends of the telescopic rods (4) are fixedly connected with the bottom of the placing plate (16) and the bottom of the mounting groove (15) respectively, and the telescopic rods (4) are all sleeved with springs (41).

3. An OCR technology based scanning apparatus as recited in claim 1 wherein: the linkage mechanism comprises a first rack (42), a second rack (43) and a gear (44), the first rack (42) is fixedly connected with the top plate (23), the second rack (43) is fixedly connected with the placing plate (16), the first rack (42) and the second rack (43) are arranged oppositely, the gear (44) is rotatably assembled in the installing groove (15), and the gear (44) is located between the first rack (42) and the second rack (43) and is meshed with the first rack (42) and the second rack (43).

4. An OCR technology based scanning apparatus as recited in claim 1 wherein: the ejection mechanism comprises a rotary groove (5), a rotary rod (51) is assembled in the rotary groove (5), a first thread section (52) and a second thread section (53) are respectively arranged on the left side and the right side of the rotary rod (51), the thread directions of the first thread section (52) and the second thread section (53) are opposite, a sliding block (54) matched with the rotary groove (5) is in threaded connection with the first thread section (52) and the second thread section (53) in an equal mode, a supporting rod (55) is hinged to the upper side of the sliding block (54), the upper end of the supporting rod (55) is hinged to the front end and the rear end of the pressing plate (3) respectively, and a transmission assembly matched with the rotary rods (51) of the two ejection mechanisms is arranged in the mounting bar (32).

5. An OCR technology based scanning apparatus as recited in claim 4 wherein: the transmission assembly comprises two first helical teeth (6), two second helical teeth (61), a rotating shaft (62) and a rotating handle (63), an inner cavity (64) is formed in the mounting bar (32), the first helical teeth (6) are fixedly connected with rotating rods (51) of two ejection mechanisms respectively, the rotating shaft (62) is rotatably assembled in the inner cavity (64), the rotating shaft (62) is fixedly connected with the two second helical teeth (61), the second helical teeth (61) are meshed with the two first helical teeth (6) respectively, and one end of the rotating shaft (62) stretches out the mounting bar (32) and is connected with the rotating handle (63).

6. An OCR technology based scanning apparatus as recited in claim 5 wherein: the surface of the rotating handle (63) is provided with patterns.

7. An OCR technology based scanning apparatus as recited in claim 1 wherein: stop gear is including electro-magnet (65) and ironbar (66), ironbar (66) and workstation (1) fixed connection, electro-magnet (65) and mounting bar (32) downside fixed connection, electro-magnet (65) and ironbar (66) position phase-match, mounting bar (32) are equipped with handle (67), handle (67) are equipped with control switch (68), control switch (68) power input end is connected with control panel (14) power output end electricity, control switch (68) power output end is connected with electro-magnet (65) power input end electricity.

8. An OCR technology based scanning apparatus as recited in claim 1 wherein: a light supplement lamp (110) is arranged on the upper side of the support frame (11), and the power input end of the light supplement lamp (110) is electrically connected with the power output end of the control panel (14).