CN218416469U

CN218416469U - Bidirectional scanning large-format image acquisition device based on image splicing technology

Info

Publication number: CN218416469U
Application number: CN202222668844.6U
Authority: CN
Inventors: 武兵; 郑亮
Original assignee: Shanghai Saitu Image Equipment Co ltd
Current assignee: Shanghai Saitu Image Equipment Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-01-31
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a bidirectional scanning large-format image acquisition device based on an image splicing technology; the key points of the technical scheme are as follows: including location supporting component, X axle removal subassembly, Y axle removal subassembly, Z axle removal subassembly and image acquisition subassembly: the positioning support assembly is located at the lowest part of the whole image acquisition device and used for positioning and supporting the X-axis moving assembly, the Y-axis moving assembly and the Z-axis moving assembly, the X-axis moving assembly is installed on the Y-axis moving assembly, the Z-axis moving assembly is installed on the positioning support assembly, the Y-axis moving assembly is installed on the positioning support assembly and used for driving the image acquisition assembly to move along the Y axis, and the image acquisition assembly is installed on the X-axis moving assembly. The utility model discloses be provided with Z axle and remove the subassembly, Z axle removes the subassembly and can drive the original manuscript and move in the vertical direction, makes the original manuscript surface of different thickness keep unanimous with image acquisition module's distance, has solved the great original manuscript of thickness and has focused inaccurate problem.

Description

Bidirectional scanning large-format image acquisition device based on image splicing technology

Technical Field

The utility model relates to an image acquisition field especially involves a big breadth image acquisition device of two-way scanning based on image mosaic technique.

Background

Image acquisition refers to a process of converting an image into a digital image after sampling and quantizing the image, inputting the digital image into a memory, and storing the digital image into the memory, and generally, an image acquisition device is applied to various fields, such as acquisition of a picture original, and a scheme of multiple cameras is required in order to improve a measurement picture range and an optical lens magnification, which greatly increases the cost.

Application No.: CN 202210749.6 a line scan measuring system and line scan image stitching method based on position latching technology, comprising: the moving platform is used for installing a product and adjusting the scanning position of the product by driving the product to slide along the guide rail through the driving assembly; the grating ruler is parallel to the guide rail; the reading head moves along with the moving platform and corresponds to the grating ruler; the linear array camera is suspended above the motion platform; and when the motion platform moves to reach a preset scanning starting point, controlling the linear array camera to start scanning the product according to a preset frequency, and controlling the reading head to start latching the position data of the grating ruler according to the preset frequency.

According to the scheme, the movable motion platform and the movable linear array camera are arranged, an object arranged on the motion platform is scanned from multiple angles, but the device can only be moved and adjusted from two directions of an X axis and a Z axis, the size and the cost of the imaging sensor are limited, the collection of the original with the size exceeding that of the imaging sensor needs to be completed through a zooming technology, the scanning precision is reduced along with the increase of the breadth of the original due to the existence of the zooming technology, and the thickness of the original can also influence the zooming precision. Therefore, the present application provides a bidirectional scanning large-format image capturing device based on an image stitching technique to overcome the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a big breadth image acquisition device of two-way scanning based on image concatenation technique for solve current image acquisition system and can only remove the adjustment from two directions of X axle and Z axle, be subject to imaging sensor size and cost, need accomplish the collection that the size surpassed imaging sensor's original manuscript through the technique of zooming, the existence of the technique of zooming has resulted in the scanning precision to descend along with the original manuscript breadth increase, the thickness of original manuscript also can be to the problem that the precision of zooming produced the influence.

The above technical purpose of the utility model is realized with following technical scheme:

the utility model provides a big breadth image acquisition device of two-way scanning based on image mosaic technique, includes location supporting component, X axle removal subassembly, Y axle removal subassembly, Z axle removal subassembly and image acquisition subassembly:

the positioning support component is located at the lowest part of the whole image acquisition device and used for positioning and supporting the X-axis moving component, the Y-axis moving component and the Z-axis moving component, the X-axis moving component is installed on the Y-axis moving component and used for driving the image acquisition component to move along the X axis, the Y-axis moving component is installed on the positioning support component and used for driving the image acquisition component to move along the Y axis, the Z-axis moving component is installed on the positioning support component and used for driving the image acquisition component to move along the Z axis, and the image acquisition component is installed on the X-axis moving component and used for acquiring images of an object to be scanned.

The utility model discloses a further set up to: the location supporting component comprises side plates and a transverse plate, the side plates are symmetrically arranged on the left side and the right side, the transverse plate is arranged between the two side plates, the left end and the right end of the transverse plate are fixedly connected with the side plates respectively, and an installation cavity used for containing the Z-axis moving component is formed in the transverse plate.

The utility model discloses a further set up to: the X-axis moving assembly comprises a top beam support, a top beam slide rail, a top beam chain and a top beam slide block;

open on the back timber support and be used for holding the shifting chute of image acquisition subassembly, the back timber slide rail sets up in the shifting chute, the back timber slider slides and sets up on the back timber slide rail and can remove along the length direction of back timber slide rail, the one end of back timber chain in image processing module fixed connection, the other end of back timber chain with back timber slider fixed connection.

The utility model discloses a further set up to: the Y-axis moving assembly comprises a chain, a slide rail connecting piece, a slide rail and a slide rail cover;

the slide rail sets up on the location supporting component, slide rail connecting piece slidable mounting is on the slide rail, be provided with the slide rail cover on the slide rail, slide rail connecting piece's top and back timber leg joint, the one end of chain with back timber leg joint, the other end of chain is fixed on the location supporting component.

The utility model discloses a further set up to: the Z-axis moving assembly comprises a storage platform, a motor, a transmission belt and a lifting piece;

the output shaft of the motor is provided with a driving wheel, the driving wheel is in transmission connection with a driven wheel through a transmission belt, the driven wheel is installed at the lower end of the lifting piece, and the upper end of the lifting piece is connected with the storage platform.

The utility model discloses a further set up to: the image acquisition assembly comprises a first fixing piece, a second fixing piece, a synchronous lamp, a telecentric lens and an imaging sensor;

it is a plurality of the synchronizing lamp is installed in first mounting, the second mounting sets up the center of first mounting, telecentric lens sets up in the second mounting, imaging sensor is located telecentric lens's top.

The utility model discloses a further set up to: and a supporting plate for fixing the chain is arranged on the side surface of one of the side plates.

The utility model discloses a further set up to: the device further comprises an external controller, wherein the external controller is connected with the image acquisition device and is used for controlling the working state of the image acquisition device.

The utility model discloses a further set up to: an emergency stop button is arranged at the end part of the sliding rail.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the X-axis moving assembly and the Y-axis moving assembly are used for driving the image collecting assembly to move in the directions of the X-axis moving assembly and the Y-axis moving assembly, and the Z-axis moving assembly can drive the original manuscript to move in the vertical direction, so that the distances between the surfaces of the original manuscripts with different thicknesses and the image collecting module are kept consistent, and the problem that the original manuscripts with larger thicknesses are inaccurate in focusing is solved.

2. The image acquisition module uses a telecentric lens for imaging, the image has no parallax, the acquisition depth of field is large, the reflection interference is effectively avoided, and the distortion and deformation of the image are reduced to the greatest extent.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the Z-axis moving assembly of the present invention.

Fig. 3 is a schematic structural diagram of the X-axis moving assembly of the present invention.

Fig. 4 is a top view of the X-axis moving assembly of the present invention.

Fig. 5 is a schematic structural diagram of the Y-axis moving assembly of the present invention.

Fig. 6 is a top view of the Y-axis moving assembly of the present invention.

Fig. 7 is a schematic structural diagram of the image capturing assembly of the present invention.

Fig. 8 is a schematic diagram of the scanning track of embodiment 1 of the present invention.

Fig. 9 is a schematic diagram of a scanning track according to embodiment 2 of the present invention.

Fig. 10 is a schematic diagram of an X zoom technique.

Fig. 11 is a schematic diagram of an X + Y zooming technique.

Numerical labeling: side plate 3, object placing platform 100, electric long beam 101, motor 102, transmission belt 103, lifting device 104, top beam support 200, top beam slide rail 201, top beam chain 202, top beam slide block 203, left and right supports 300, chain 301, top beam connecting vehicle 302, slide rail 303, slide rail cover 304, emergency stop button 305, synchronous lamp 401, telecentric lens 402, imaging sensor 403

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solution in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 10 to 11, in the conventional image capturing apparatus, image scanning techniques are widely used, which include an X zoom technique and an X + Y zoom technique.

The X zoom technique has the following problems when scanning an object: the scan head is in a single direction (X-axis) and the scan head is zoomed during the movement of the scan head. The length of a CCD (charge coupled device) is generally 72mm, so that a platform type scanner adopting an X zooming technology is within a range of 72mm, the imaging precision can be ensured when an original is placed in the center of a scanning platform, and the maximum optical resolution can also be ensured. When the original width is larger than 72mm, the scanning head moves in the X direction while scanning according to the original position, while adjusting the focal length. Since resolution = CCD pixels/original width, the wider the original, the lower the resulting scanning resolution, and the lower the imaging accuracy of the original edge; the original size is less than 72mm, but if the position is not at the center of the scanning table, the scanning head must be focused and then scanned, so that the imaging accuracy and the optical resolution are limited.

The X + Y zoom technique has a scan head that can move in two directions (X-axis, Y-axis), and the scan head also zooms. Since the scanning head can move in the X-axis direction and the Y-axis direction, the scanning head can capture the position of the original regardless of the position of the original placed on the scanning stage. As long as the original manuscript is not more than 72mm, the scanning precision can reach the maximum optical resolution and can also ensure the scanning precision. However, the scanning accuracy is restricted by the size of the original.

Example 1

As shown in fig. 1 to 8, the utility model provides a big breadth image acquisition device of two-way scanning based on image splicing technique, including location supporting component, X axle removal subassembly, Y axle removal subassembly, Z axle removal subassembly and image acquisition subassembly:

The location supporting component comprises side plates and a transverse plate 101, the side plates are symmetrically arranged on the left side and the right side, the transverse plate is arranged between the two side plates 3, the left end and the right end of the transverse plate are fixedly connected with the side plates respectively, and the transverse plate is provided with an installation cavity used for containing a Z-axis moving component.

The X-axis moving assembly comprises a top beam support 200, a top beam slide rail 201, a top beam chain 202 and a top beam slide block 203; open on the back timber support 200 and be used for holding the shifting chute of image acquisition subassembly, back timber slide rail 201 sets up in the shifting chute, back timber slider 203 slides and sets up on the back timber slide rail 201 and can remove along the length direction of back timber slide rail 201, the one end of back timber chain 202 in image processing module fixed connection, the other end of back timber chain 202 with back timber slider 203 fixed connection, in this embodiment, the back timber slide rail is electronic slide rail, during the use, thereby starts the back timber slide rail and drives back timber chain drive image processing module and remove along the back timber support through the back timber slider.

The Y-axis moving assembly comprises a chain 301, a slide rail connector 302, a slide rail 303 and a slide rail cover 304; slide rail 303 sets up on the location supporting component, slide rail connecting piece 302 slidable mounting is on slide rail 303, be provided with slide rail cover 304 on the slide rail 303, slide rail connecting piece 302's top is connected with back timber support 200, chain 301's one end with back timber support 200 is connected, chain 301's the other end is fixed on the location supporting component, and in this embodiment, the slide rail is electronic slide rail, and during the use, start slide rail drive slide rail connecting piece, drive chain and back timber support removal.

The Z-axis moving assembly comprises a placement platform 100, a motor 102, a transmission belt 103 and a lifting piece 104; install the action wheel on motor 102's the output shaft, the action wheel passes through drive belt 103 and is connected with the transmission of follow driving wheel, install the lower extreme at elevating part 104 from the driving wheel, the upper end of elevating part 104 with storage platform 100 is connected, in this embodiment, elevating part 104 is the screw rod, it has the through-hole that is used for holding the screw rod to open on the storage platform 100, set up in the internal thread that matches with the screw rod in the through-hole, the quantity of motor is four, is located four corners of installation cavity, drives the screw rod through motor 102, drive belt 103, action wheel, follow driving wheel and rotates during the use to realize contraposition platform 100's altitude mixture control.

The image acquisition assembly comprises a first fixing piece, a second fixing piece, a synchronous lamp 401, a telecentric lens 402 and an imaging sensor 403; it is a plurality of the synchrotron lamp 401 is installed in first mounting, the second mounting sets up the center of first mounting, telecentric lens 402 sets up in the second mounting, imaging sensor 403 is located telecentric lens's top, telecentric lens can make the chief ray that makes focused beam all be perpendicular to focal plane under the condition of any angle of view through making the system's entrance pupil at the front focus position of lens system, the image does not have the parallax, gathers depth of field greatly, effectively avoids reflection of light to disturb to the at utmost has reduced image distortion, and during the use, the light that synchrotron lamp sent shines on the original manuscript, and the image reflects back, passes telecentric lens and gets into imaging sensor. A general scanner has a plurality of sets of mirrors, and light information is transmitted to a CCD for processing through the reflection of the mirrors, and the signal loss may be caused by diffraction and the like during the transmission of the light signal. The scheme that this application provided can make the light source directly to CCD, and the centre does not set up other reflection lens, has reduced the error at the at utmost.

And a supporting plate for fixing the chain is arranged on the side surface of one of the side plates. Still include external controller, external controller is connected with image acquisition device for control image acquisition device's operating condition, external controller can integrate and save the image data who collects simultaneously. The tip of slide rail is equipped with emergency stop button, can close the slide rail through emergency stop button for stop image acquisition process under the emergency, protection equipment, personnel's safety.

Placing the manuscript needing to be scanned on a storage platform, lifting the height of the storage platform through a Z-axis moving assembly, adjusting to a position suitable for focusing, setting the lower left of the manuscript as an image acquisition origin, and focusing the manuscript through an image acquisition module; setting specific parameters such as scanning parameters, scanning directions and the like through an external controller; the left lower side of the manuscript is used as an acquisition starting point, the image acquisition module carries out bidirectional reciprocating motion along the X-axis direction on the top beam support, the top beam support is driven by the Y-axis motion mechanism to carry out Y-axis direction motion, and the image acquisition module carries out track motion of left → right → up → right → left \8230and \8230, and the large-breadth manuscript is divided into a plurality of areas to be respectively scanned and acquired; and splicing and calculating the information of each area of the scanned original document according to the scanning sequence and direction by the external controller to obtain final image data and storing the final image data.

Example 2

In this embodiment, the lower right side of the original document is used as a collection starting point, the motion trajectory of the image collection module is right → left → up → right trajectory motion, the large-format original document is divided into a plurality of regions, data collection by scanning is performed respectively, then collected data are integrated in a centralized manner, the movement trajectory of the image collection module can be adjusted according to the size of an image, the collection starting point can also be adjusted, the width of each region is determined by the size and resolution of an image sensor in the image collection module, and the width of each region can be adjusted according to the performance of equipment. The moving trace and the collection starting point in embodiment 1 and embodiment 2 are only for explanation and are not to be construed as limitations of the present invention.

The utility model discloses a use and principle are as follows the utility model discloses X axle motion and Y axle motion, X axle moving assembly install on Y axle moving assembly for collect former notice image data's image acquisition module setting X axle moving assembly again, can move at X axle direction or Y axle direction to the pair of moving image acquisition module through X axle motion and Y axle motion, simultaneously the utility model discloses still be provided with Z axle moving assembly, Z epaxial being provided with is used for preventing the object placing platform of original manuscript, use to start Z axle moving assembly, drive the original manuscript and do the vertical lift of Z axle direction and move, realize the adjustment to drawing manuscript height to make the original manuscript of different thickness keep the same with the distance of image acquisition module, solved the problem that the great original manuscript of thickness was focused.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the designated devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a big breadth image acquisition device of two-way scanning based on image mosaic technique which characterized in that, includes location supporting component, X axle removal subassembly, Y axle removal subassembly, Z axle removal subassembly and image acquisition subassembly:

2. The large-format image acquisition device for bidirectional scanning based on the image stitching technology as claimed in claim 1, wherein the positioning support assembly comprises side plates and a transverse plate, the side plates are arranged in bilateral symmetry, the transverse plate is arranged between the two side plates, the left end and the right end of the transverse plate are respectively fixedly connected with the side plates, and the transverse plate is provided with an installation cavity for accommodating the Z-axis moving assembly.

3. The device for acquiring the large-format image through the bidirectional scanning based on the image stitching technology according to claim 1, wherein the X-axis moving assembly comprises a top beam support, a top beam slide rail, a top beam chain and a top beam slide block;

it is used for holding to open on the back timber support the shifting chute of image acquisition subassembly, the back timber slide rail sets up in the shifting chute, the back timber slider slides and sets up on the back timber slide rail and can remove along the length direction of back timber slide rail, the one end of back timber chain is in image processing module fixed connection, the other end of back timber chain with back timber slider fixed connection.

4. The two-way scanning large-format image acquisition device based on the image stitching technology as claimed in claim 1, wherein the Y-axis moving assembly comprises a chain, a slide rail connecting member, a slide rail and a slide rail cover;

5. The device for collecting large-format images through bidirectional scanning based on the image stitching technology according to claim 1, wherein the Z-axis moving assembly comprises a platform, a motor, a transmission belt, and a lifting member;

6. The two-way scanning large-format image acquisition device based on the image stitching technology as claimed in claim 1, wherein the image acquisition assembly comprises a first fixing member, a second fixing member, a synchronous lamp, a telecentric lens and an imaging sensor;

a plurality of the synchrotron lamp is installed in first mounting, the second mounting sets up the center of first mounting, telecentric lens sets up in the second mounting, imaging sensor is located telecentric lens's top.

7. The device according to claim 2, wherein a support plate for fixing a chain is disposed on a side of one of the side plates.

8. The bidirectional-scanning large-format image acquisition device based on the image stitching technology as claimed in claim 1, further comprising an external controller, wherein the external controller is connected with the image acquisition device and is used for controlling the working state of the image acquisition device.

9. The device according to claim 4, wherein an emergency stop button is provided at an end of the slide rail.