Image calibration device of code scanner

Abstract

A code scanner image calibration device comprises a combined target, a tool table and a first track, the combined target or the tool table is installed on the first track, the tool table is provided with an installation position capable of installing a code scanner, the combined target at least comprises a first target, a second target and a third target, the first target is provided with a first symmetry axis, and the third target is provided with a second symmetry axis. The second target and the third target are symmetrically arranged on the two sides of the first symmetry axis, the second target can rotate around the second axis relative to the first target, the third target can rotate around the third axis relative to the first target, the second axis and the third axis are symmetrically arranged on the two sides of the first symmetry axis, or the second axis and the third axis coincide with the first symmetry axis. The second target and the third target are provided with first linkage structures, so that the second target and the third target always rotate by the same angle in opposite directions when rotating. Therefore, the calibration of the calibrated camera is more convenient, and the calibration speed is higher and rapid calibration can be realized when the device is used for code scanners which are produced in a large scale.

Description

Technical Field

[0001] The invention belongs to the field of industrial vision device image calibration, and in particular relates to a barcode scanner image calibration device. Background Art

[0002] A barcode scanner is a data collection terminal device that looks like a mobile phone. It can be used as an industrial visual device and is widely used in various industrial fields, especially 5G barcode scanners. As an industrial-grade scanning device, it not only has a great improvement in speed, but also has a significant increase in functions. It needs to support multiple scanning modes, such as single scanning, continuous scanning, etc. It can be widely used in smart manufacturing and 3C electronics. It can also be widely used in workshop storage, such as adding face recognition functions, especially some important handheld data collectors used for warehousing. The use of barcode scanners with face recognition functions can record the operators of related products entering and leaving the warehouse, and different personnel can also have different permissions. In order to increase the recognition range or recognition speed of the barcode scanner, the scanning terminal of the barcode scanner may also need to be equipped with two cameras, such as a combination of a telephoto camera and a near-focus camera, or a dual camera that can recognize distance or a larger scanning range. Such a multifunctional device can be called an intelligent terminal barcode scanner. Different cameras require different image calibrations to achieve different functions.

[0003] The face recognition function usually requires the ability to recognize 3D images. Therefore, such a barcode scanner usually requires two cameras. The two cameras need to perform dual-target positioning before the matching algorithm. The two cameras first need to perform single-target positioning on a single camera during dual-target timing, that is, distortion calibration of a single camera image. The camera at the bottom of the barcode scanner needs to perform at least single-target positioning. For devices with two cameras and other 3D recognition functions such as distance detection function, dual-target positioning may also be required.

[0004] At present, the more common calibration method generally uses a chessboard as a target for image calibration, uses a camera to take pictures of the chessboard at different angles, and uses computer software such as matlab toolbox or OpenCV to analyze and calibrate the photos of appropriate size, and finally obtains data such as distortion parameters, movement matrix, rotation matrix, offset matrix and projection matrix. However, the pixels of the camera are limited, and even the most perfect model will have different results when processing different photos. Therefore, during the calibration process, it will be found that the pixel errors of some images are large, and they are generally regarded as invalid images and directly removed. Therefore, it is necessary to prepare more photos of different angles for backup. In addition, some calibrations also need to provide the coordinates of the midpoint of the world coordinate system, and the more coordinates there are, the more accurate the final parameters are, and the camera's final image calibration is also more accurate, so it is necessary to quickly obtain a large number of more accurate coordinates. Summary of the invention

[0005] In view of the above-mentioned prior art, the purpose of the present invention is to provide an industrial barcode scanner image calibration device, which can quickly obtain the coordinates of some target points and reduce the number of invalid images to reduce the calculation amount of calibration data.

[0006] The technical solution of the present invention is implemented as follows: a barcode scanner image calibration device includes a combined target, a workbench and a first track, the combined target or the workbench is installed on the first track, the workbench is provided with an installation position for installing the barcode scanner, the combined target includes at least a first target, a second target and a third target, the first target is provided with a first symmetry axis, the second target and the third target are symmetrically arranged on both sides of the first symmetry axis, the second target can rotate around the second axis relative to the first target, the third target can rotate around the third axis relative to the first target, the second axis and the third axis are symmetrically arranged on both sides of the first symmetry axis or the second axis and the third axis coincide with the first symmetry axis, the second target and the third target are provided with a first linkage structure so that the second target and the third target always rotate in opposite directions at the same angle when rotating.

[0007] Further, the first linkage structure includes a first annular groove track, a first annular turbine, a second annular groove track, a second annular turbine, a first worm and a second worm. The first annular groove track and the second annular groove track are fixed on the back of the first target. The first annular groove track and the second annular groove track are both provided with an annular opening and an end opening. One end of the first annular turbine is fixed on the back of the second target and the other end is inserted into the first annular groove track from the end opening. The teeth of the first annular turbine extend from the annular opening and protrude a certain height relative to the first annular groove track. One end of the second annular turbine is fixed on the back of the third target and the other end is inserted into the second annular groove track from the end opening. The teeth of the second annular turbine extend from the annular opening and protrude a certain height relative to the second annular groove track. The first worm matches the first annular turbine, the second worm matches the second annular turbine, and the first worm and the second worm are coaxially fixed or transmitted through multiple gears.

[0008] Furthermore, the first linkage structure includes an annular track, an annular outer gear, an annular inner gear and a transmission gear. The annular track is directly connected and fixed to the back of the first target. Installation ports are provided at both ends of the annular track. One end of the annular outer gear is fixed to the back of the third target and the other end is inserted into the annular track from the installation port. One end of the annular inner gear is fixed to the back of the second target and the other end is inserted into the annular track from the installation port. The annular outer gear, the annular inner gear and the transmission gear have the same module. The transmission gear is located between the annular outer gear and the annular inner gear, and the transmission gear is meshed with the annular outer gear and the annular inner gear.

[0009] Furthermore, the combination target also includes a fourth target and a fifth target, the first target is provided with a second symmetry axis, the second symmetry axis is perpendicular to the first symmetry axis, the fourth target rotates around the fourth axis relative to the first target, the fifth target rotates around the fifth axis relative to the first target, the fourth target and the fifth target are axially symmetrical with respect to the second symmetry axis, the fourth axis and the fifth axis are axially symmetrical with respect to the second symmetry axis, and the fourth target and the fifth target are provided with a second linkage structure so that the fourth target and the fifth target always rotate in opposite directions at the same angle when rotating.

[0010] Furthermore, the second linkage structure and the first linkage structure adopt the same transmission structure, and the second linkage structure and the first linkage structure are linked with the same indexing hand wheel through the transmission structure.

[0011] Furthermore, the combined target also includes a sixth target, a seventh target, an eighth target and a ninth target, the first target is provided with a third symmetry axis and a fourth symmetry axis, the third symmetry axis is perpendicular to the fourth symmetry axis, the third symmetry axis forms an angle of 45 degrees with the first symmetry axis, the sixth target rotates relative to the first target around the sixth axis, the seventh target rotates relative to the first target around the seventh axis, the sixth target and the seventh target are axially symmetrical with respect to the third symmetry axis, the sixth axis and the seventh axis are axially symmetrical with respect to the third symmetry axis, the sixth target and the seventh target are provided with a third linkage structure so that the sixth target The eighth target rotates around the eighth axis relative to the first target, and the ninth target rotates around the ninth axis relative to the first target. The eighth target and the ninth target are axially symmetrical with respect to the fourth axis of symmetry, and the eighth axis and the ninth axis are axially symmetrical with respect to the fourth axis of symmetry. The eighth target and the ninth target are provided with a fourth linkage structure so that the eighth target and the ninth target always rotate at the same angle in opposite directions when they rotate, and the second axis, the third axis, the fourth axis, the fifth axis, the sixth axis, the seventh axis, the eighth axis and the ninth axis are in the same plane.

[0012] Furthermore, the first linkage structure, the second linkage structure, the third linkage structure and the fourth linkage structure are linked with the same indexing hand wheel.

[0013] Furthermore, a surface light source is provided inside or on the back of the combined target, the front of the combined target is frosted and a part of the area is screen-printed with matte ink to form a checkerboard.

[0014] Furthermore, the device is also provided with a second track and a planar target, the planar target is arranged on the second track, and the combined target is arranged on the first track.

[0015] Furthermore, the tooling table is provided with a rotating table, and the rotating table is provided with a fixed slot matching the barcode scanner.

[0016] The beneficial effects of this design are: the camera of the barcode scanner can obtain at least three calibrated or marked materials by taking one photo, saving a lot of time in taking photos, and only needs to be segmented later. The second target and the third target can be linked to rotate at the same angle. When adjusting one target to a suitable position during single-target timing, the other target will also be in a suitable position, and there will be no large deviation in the calculation. When performing dual-target timing, symmetrically arranging two identical cameras on both sides of the first symmetry axis can meet the deviation of one camera and the deviation of the other camera. In addition, synchronous rotation is also more convenient for confirming coordinates. The coordinates of the second target and the third target have certain regular changes, and more coordinates can be obtained more easily. This makes it more convenient to calibrate the calibrated camera, that is, the calibrated coordinates can be obtained more conveniently. For industrial mass-produced barcode scanners, the use of this device not only speeds up the calibration, but also enables rapid verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional schematic diagram of a barcode scanner image calibration device according to Embodiment 1 of the present invention; Figure 2 This is a three-dimensional schematic diagram of a barcode scanner image calibration device without a frame according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the layout of the second transmission layer of Example 1 of the present invention; Figure 4 This is a schematic diagram of the layout of the first transmission layer of Example 1 of the present invention; Figure 5 This is a schematic top view of the layout of the first transmission layer of Example 1 of the present invention; Figure 6 A three-dimensional schematic diagram of the installation of the first linkage structure and the second linkage structure of Example 1 of the present invention; Figure 7 This is a schematic diagram of the integrated structure of the annular groove in Example 1 of the present invention; Figure 8 This is a schematic diagram of a first annular turbine according to Embodiment 1 of the present invention; Fig. 9 Schematic diagram of the positions of the axes of Embodiment 1 of the present invention; Fig.10 This is a schematic diagram of the linkage structure of Example 2 of the present invention; Fig.11 This is a schematic diagram of removing the circular track in Example 2 of the present invention; Fig.12 A schematic three-dimensional diagram of the installation of the first linkage structure and the second linkage structure of Example 2 of the present invention; Fig.13 A schematic top view of the installation of the first linkage structure and the second linkage structure of Example 2 of the present invention; In the figure: 1, combined target; 2, workbench; 3, first track; 4, plane target; 5, barcode scanner; 6, rack; 7, control box; 8, base; 9, mounting bracket; 10, folding arm; 11, first target; 12, second target; 13, third target; 14, fourth target; 15, fifth target; 16, sixth target; 17, seventh target; 18, eighth target; 19, ninth target; 20, indexing hand wheel; 21, first linkage structure; 22, second linkage structure; 23, third linkage structure; 24, fourth linkage structure structure; 25, first transmission layer; 26, second transmission layer; 27, first indexing plate; 28, rotating table; 29, end opening; 30, annular opening; 31, first annular groove track; 32, second annular groove track; 33, third annular groove track; 34, fourth annular groove track; 35, fifth annular groove track; 36, sixth annular groove track; 37, seventh annular groove track; 38, eighth annular groove track; 39, second indexing plate; 40, interval mounting plate; 41, first annular turbine; 42, second annular turbine; 43, annular 44, gear part; 45, mounting plate; 46, fourth annular turbine; 47, third annular turbine; 48, door panel structure; 49, second track; 50, frame structure; 51, first worm; 52, second worm; 53, third worm; 54, fourth worm; 55, fifth worm; 56, sixth worm; 57, seventh worm; 58, eighth worm; 59, transmission bevel gear; 60, synchronous bevel gear; 61, first bevel gear; 62, second bevel gear; 63, third bevel gear; 64, fourth bevel gear; 65, fifth Bevel gear; 66, sixth bevel gear; 67, seventh bevel gear; 68, eighth bevel gear; 69, seventh synchronous bevel gear; 70, annular track; 71, annular outer gear; 72, annular inner gear; 73, transmission gear; 74, limit gear; 86, mounting thick plate; 87, first symmetric axis; 88, second symmetric axis; 89, third symmetric axis; 90, fourth symmetric axis; 92, second axis; 93, third axis; 94, fourth axis; 95, fifth axis; 96, sixth axis; 97, seventh axis; 98, eighth axis; 99, ninth axis. DETAILED DESCRIPTION

[0018] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are merely exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The accompanying drawings may not be drawn to scale, and certain features may be exaggerated or reduced to show the details of specific components. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1 ,and Figure 2 As shown, a barcode scanner image calibration device includes a frame 6, a control box 7, a base 8 and a mounting bracket 9. The frame 6 is a frame structure 50 and a door panel structure 48 of the barcode scanner image calibration device. The control box 7 can control the power supply such as the light of the device. The base 8 is a mounting base. The mounting bracket 9 can be installed with a panel with a light source, that is, a target for image calibration.

[0020] like Figure 1 , Figure 2 , Figure 3 , Fig. 9 and Fig.10 As shown, the barcode scanner image calibration device also includes a combined target 1, a workbench 2 and a first track 3. The combined target 1 is mounted on a mounting bracket 9 through a multi-section folding arm 10. The mounting bracket 9 is mounted on the first track 3. The workbench 2 is provided with a mounting position capable of mounting a barcode scanner 5. The combined target 1 includes at least a first target 11, a second target 12 and a third target 13. The first target 11 is provided with a first symmetry axis 87. The second target 12 and the third target 13 are symmetrically arranged on both sides of the first symmetry axis 87. The second target 12 can rotate relative to the first target 11 around a second axis 92. The third target 13 can rotate relative to the first target 11 around a third axis 93. The second axis 92 and the third axis 93 are symmetrically arranged on both sides of the first symmetry axis 87. You can refer to Example 1, or the second axis 92 and the third axis 93 coincide with the first symmetry axis 87. You can refer to Example 2. The second target 12 and the third target 13 are provided with a first linkage structure so that the second target 12 and the third target 13 always rotate in opposite directions by the same angle when rotating. In the figure, it can be considered that the first symmetry axis 87 is in the horizontal direction, the second target 12 is located above the first target 11 , and the third target 13 is located below the first target 11 .

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, when the barcode scanner 5 is installed on the workbench 2, the first target 11 is fixed vertically and will not be adjusted after the installation is completed. The coordinate values ​​of all the checkerboard intersections on the first target 11 can be determined by the relative position of the first track 3. The second target 12 and the third target 13 are generally inclined at a certain angle. Therefore, the coordinate values ​​of the checkerboard intersections of the second target 12 and the third target 13 generally need to be calculated. In order to reduce the amount of calculation, the second axis 92 is set at the position of several checkerboard intersections. Then, no matter how the second target 12 rotates, the coordinate values ​​of the checkerboard intersections on the second axis 92 remain unchanged. Similarly, the coordinate values ​​of the checkerboard intersections on the third axis 93 remain unchanged. If the coordinates of more corner points are needed, they can be obtained by simple calculation according to the rotation angle. The second target 12 and the third target 13 rotate at the same angle. In this way, when the pixel deviation obtained by taking a photo of the second target 12 meets the requirement, the pixel deviation obtained by taking a photo of the third target 13 will generally meet the requirement. In this way, the number of photos can be reduced, and there is no need to take a large number of spare photos. When performing batch image calibration or calibration, efficiency can be improved and a lot of time can be saved.

[0022] Embodiment 1: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the first linkage structure 21 includes a first annular groove track 31, a first annular turbine 41, a second annular groove track 32, a second annular turbine 42, a first worm 51 and a second worm 52. The first annular groove track 31 and the second annular groove track 32 are fixed to the back of the first target 11. The first annular groove track 31 and the second annular groove track 32 are both provided with a T-shaped annular groove and an annular opening 30 and an end opening 29. One end of the first annular turbine 41 is fixed to the back of the second target 12, and the other end is inserted into the first annular groove track 31 from the end opening 29. The gear teeth of an annular turbine 41 extend from the annular opening 30 and protrude a certain height relative to the first annular groove track 31. One end of the second annular turbine 42 is fixed to the back of the third target 13 and the other end is inserted into the second annular groove track 32 from the end opening 29. The gear teeth of the second annular turbine 42 extend from the annular opening 30 and protrude a certain height relative to the second annular groove track 32. The first worm 51 matches the first annular turbine 41, and the second worm 52 matches the second annular turbine 42. The first worm 51 and the second worm 52 are coaxially fixed or transmitted through multiple gears. The annular turbine designed in this way can only rotate along the annular groove, cannot move in a straight line, and has a compact layout. Multiple transmission structures can be set to achieve synchronous transmission.

[0023] like Figure 5 and Figure 8 As shown, a mounting plate 45 is provided at one end of the first annular turbine 41, and the main body of the first annular turbine 41 includes an annular portion 43 and a gear portion 44, the gear portion 44 is protruding relative to the annular portion 43, and the annular portion 43 serves as a guide structure for the gear portion 44. The first annular turbine 41 is not an integral structure of a turbine, and a local structure is adopted to meet the transmission requirements. The relative rotation angle between the second target 12 and the third target 13 is small, generally within 30 degrees, so there is no need for a large angle. The first annular turbine 41 and the second annular turbine 42 can adopt the same design.

[0024] like Figure 4 , Figure 5 , Figure 6 and Fig. 9 As shown, the combined target 1 also includes a fourth target 14 and a fifth target 15, the first target 11 is provided with a second symmetry axis 88, the second symmetry axis 88 is perpendicular to the first symmetry axis 87, the fourth target 14 rotates around a fourth axis 94 relative to the first target 11, the fifth target 15 rotates around a fifth axis 95 relative to the first target 11, the fourth target 14 and the fifth target 15 are axially symmetrical with respect to the second symmetry axis 88, the fourth axis 94 and the fifth axis 95 are axially symmetrical with respect to the second symmetry axis 88, and the fourth target 14 and the fifth target 15 are provided with a second linkage structure 22 so that the fourth target 14 and the fifth target 15 always rotate in opposite directions at the same angle when rotating.

[0025] like Figure 6 and Figure 7 As shown, the second linkage structure 22 and the first linkage structure 21 adopt the same transmission structure, and the second linkage structure 22 includes a third worm 53, a fourth worm 54, a third annular turbine 47, a fourth annular turbine 46, a third annular groove track 33 and a fourth annular groove track 34. The second linkage structure 22 and the first linkage structure 21 are linked with the same indexing hand wheel 20 through the transmission structure. The first annular groove track 31 is provided with a first worm 51 bracket, the first worm 51 is coaxially arranged with the first bevel gear 61, the second annular groove track 32 is provided with a second worm 52 bracket, the second worm 52 is coaxially arranged with the second bevel gear 62, the third worm 53 is coaxially arranged with the third bevel gear 63, the fourth worm 54 is coaxially arranged with the fourth bevel gear 64, the third bevel gear 63, the fourth bevel gear 64, the first bevel gear 61 and the second bevel gear 62 have the same gear parameters and mesh with the same transmission bevel gear 59, and the transmission bevel gear 59 is coaxially arranged with the indexing hand wheel 20. The first annular groove track 31 , the second annular groove track 32 , the third annular groove track 33 and the fourth annular groove track 34 are connected by the mounting thick plate 86 to form an integral structure, and can be integrally injected if the precision requirement is not high.

[0026] like Figure 1 and Fig. 9As shown, the combined target 1 also includes a sixth target 16, a seventh target 17, an eighth target 18 and a ninth target 19, the first target 11 is provided with a third symmetry axis 89 and a fourth symmetry axis 90, the third symmetry axis 89 is perpendicular to the fourth symmetry axis 90, the third symmetry axis 89 forms an angle of 45 degrees with the first symmetry axis 87, the sixth target 16 rotates around the sixth axis 96 relative to the first target 11, the seventh target 17 rotates around the seventh axis 97 relative to the first target 11, the sixth target 16 and the seventh target 17 are axially symmetrical with respect to the third symmetry axis 89, the sixth axis 96 and the seventh axis 97 are axially symmetrical with respect to the third symmetry axis 89, the sixth target 16 and the seventh target 17 are provided with a third linkage structure 23 so that the sixth target 16 The eighth target 18 rotates around the eighth axis 98 relative to the first target 11, and the ninth target 19 rotates around the ninth axis 99 relative to the first target 11. The eighth target 18 and the ninth target 19 are axially symmetrical with respect to the fourth symmetry axis 90. The eighth axis 98 and the ninth axis 99 are axially symmetrical with respect to the fourth symmetry axis 90. The eighth target 18 and the ninth target 19 are provided with a fourth linkage structure 24 so that the eighth target 18 and the ninth target 19 always rotate in the opposite direction at the same angle when rotating. The second axis 92, the third axis 93, the fourth axis 94, the fifth axis 95, the sixth axis 96, the seventh axis 97, the eighth axis 98 and the ninth axis 99 are in the same plane. The first symmetry axis 87, the second symmetry axis 88, the third symmetry axis 89 and the fourth symmetry axis 90 are in the same plane, that is, on the front of the first target 11. The nine targets are in nine planes and are symmetrically arranged. In a three-dimensional space, more calibration coordinates can be obtained, and the image finally obtained is closer to the actual state.

[0027] like Figure 2 and Figure 3As shown, the first linkage structure 21, the second linkage structure 22, the third linkage structure 23 and the fourth linkage structure 24 are linked with the same indexing hand wheel 20. The first linkage structure 21 and the second linkage structure 22 adopt the same structure and are located at the first transmission layer 25, the third linkage structure 23 and the fourth linkage structure 24 adopt the same structure and are located at the second transmission layer 26, a spacing mounting plate 40 is provided between the first transmission layer 25 and the second transmission layer 26, the sixth annular groove track 36, the seventh annular groove track 37, the eighth annular groove track 38 and the fifth annular groove track 35 are arranged at four diagonal positions of the spacing mounting plate 40, the fifth annular groove track 35 is provided with a fifth worm 55, the fifth worm 55 is coaxially provided with a fifth bevel gear 65, the fifth bevel gear 65 is meshed with the synchronous bevel gear 60, and the sixth annular groove track 36 A sixth worm 56 is provided, and a sixth bevel gear 66 is coaxially arranged on the sixth worm 56, and the sixth bevel gear 66 meshes with the synchronous bevel gear 60. A seventh annular groove track 37 is provided with a seventh worm 57, and the seventh worm 57 is coaxially arranged with a seventh bevel gear 67, and the seventh bevel gear 67 meshes with the synchronous bevel gear 60. An eighth annular groove track 38 is provided with an eighth worm 58, and the eighth worm 58 is coaxially arranged with an eighth bevel gear 68, and the eighth bevel gear 68 meshes with the seventh synchronous bevel gear 69. The seventh synchronous bevel gear 69 and the seventh bevel gear 67 are fixed on the same shaft. The synchronous bevel gear 60 is coaxially arranged with the transmission bevel gear 59, and rotates synchronously with the indexing hand wheel 20.

[0028] like Figure 1 and Figure 2 As shown, a surface light source is provided on the back or inside of the combined target 1, the front of the combined target 1 is frosted and part of the area is screen-printed with matte ink to form a checkerboard, the control box 7 can control the brightness of the surface light source and the on and off of the power supply, and the surface light source irradiates the checkerboard.

[0029] like Figure 1 and Figure 2 As shown, the device is also provided with a second track 49 and a planar target 4. The planar target 4 is arranged on the second track 49. The combined target 1 is arranged on the first track 3 so that the combined target 1 can move linearly relative to the tooling table 2 in a direction away from the tooling table 2 or close to the tooling table 2.

[0030] like Figure 1 and Figure 2 As shown, the tooling table 2 is provided with a rotating table 28, the rotating table 28 is provided with a fixing slot matching with the barcode scanner 5, and the rotating table 28 is provided with a magnet to be fixed to the tooling table 2 by magnetic attraction.

[0031] Embodiment 2: like Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, the first linkage structure 21 includes an annular track 70, an annular outer gear 71, an annular inner gear 72 and a transmission gear 73. The annular track 70 is directly connected and fixed to the back of the first target 11, or is fixed to the back of the first target 11 with the assistance of other parts. Both ends of the annular track 70 are provided with mounting openings. One end of the annular outer gear 71 is fixed to the back of the third target 13 and the other end is inserted into the annular track 70 from the mounting opening. One end of the annular inner gear 72 is fixed to the back of the second target 12 and the other end is inserted into the annular track 70 from the mounting opening. The annular outer gear 71, the annular inner gear 72 and the transmission gear 73 have the same module. The transmission gear 73 is located between the annular outer gear 71 and the annular inner gear 72, and the transmission gear 73 is meshed with the annular outer gear 71 and the annular inner gear 72. A limiting gear 74 is provided between the annular outer gear 71 and the annular inner gear 72 to limit the positions of the annular outer gear 71 and the annular inner gear 72. The annular outer gear 71 and the annular inner gear 72 can be designed with reference to the first annular turbine 41 to set the annular portion 43 and the gear tooth portion 44, so that the limiting can be achieved by relying on the annular portion 43 without setting the limiting gear 74.

[0032] like Fig.10 , Fig.11 , Fig.12 and Fig.13 As shown, the second linkage structure 22 can adopt the same design as the first linkage structure 21, and the annular track 70 of the first linkage structure 21 and the second linkage structure 22 is fixed together. The third linkage structure 23 and the fourth linkage structure 24 can refer to the transmission structure design in Example 1. The first linkage structure 21 and the second linkage structure 22 adopt the first dividing plate 27 to control the synchronous rotation, and the fourth linkage structure 24 and the third linkage structure 23 adopt the second dividing plate 39 for synchronous control. The first dividing plate 27 and the second dividing plate 39 can be set with dials. For some frequently used angles, the coordinate value of the intersection of the chessboard on the combined target 1 corresponding to the angle can be recorded, so that the coordinates can be directly queried without calculation, which is more convenient when using the coordinates.

Claims

1. A barcode scanner image calibration device, comprising a combined target (1), a tooling table (2) and a first track (3), wherein the combined target (1) or the tooling table (2) is mounted on the first track (3), and the tooling table (2) is provided with a mounting position capable of mounting a barcode scanner (5), characterized in that: The combined target (1) comprises at least a first target (11), a second target (12) and a third target (13); the first target (11) is provided with a first symmetry axis (87); the second target (12) and the third target (13) are symmetrically arranged on both sides of the first symmetry axis (87); the second target (12) can rotate relative to the first target (11) around a second axis (92); the third target (13) can rotate relative to the first target (11) around a third axis (93); the second axis (92) and the third axis (93) are symmetrically arranged on both sides of the first symmetry axis (87) or the second axis (92) and the third axis (93) coincide with the first symmetry axis (87); the second target (12) and the third target (13) are provided with a first linkage structure (21) so that the second target (12) and the third target (13) always rotate in opposite directions at the same angle when rotating.

2. The barcode scanner image calibration device according to claim 1, characterized in that: The first linkage structure (21) comprises a first annular groove track (31), a first annular turbine (41), a second annular groove track (32), a second annular turbine (42), a first worm (51) and a second worm (52); the first annular groove track (31) and the second annular groove track (32) are fixed to the back of the first target (11); the first annular groove track (31) and the second annular groove track (32) are both provided with an annular opening (30) and an end opening (29); one end of the first annular turbine (41) is fixed to the back of the second target (12) and the other end is inserted into the first annular groove track (31) through the end opening (29); the first annular turbine (41) The gear teeth extend from the annular opening (30) and protrude a certain height relative to the first annular groove track (31); one end of the second annular turbine (42) is fixed to the back of the third target (13) and the other end is inserted into the second annular groove track (32) from the end opening (29); the gear teeth of the second annular turbine (42) extend from the annular opening (30) and protrude a certain height relative to the second annular groove track (32); the first worm (51) matches the first annular turbine (41); the second worm (52) matches the second annular turbine (42); the first worm (51) and the second worm (52) are coaxially fixed or transmission is achieved through a plurality of gears.

3. The barcode scanner image calibration device according to claim 1, characterized in that: The first linkage structure (21) comprises an annular track (70), an annular outer gear (71), an annular inner gear (72) and a transmission gear (73); the annular track (70) is directly connected and fixed to the back of the first target (11); both ends of the annular track (70) are provided with mounting openings; one end of the annular outer gear (71) is fixed to the back of the third target (13) and the other end is inserted into the annular track (70) from the mounting opening; one end of the annular inner gear (72) is fixed to the back of the second target (12) and the other end is inserted into the annular track (70) from the mounting opening; the annular outer gear (71), the annular inner gear (72) and the transmission gear (73) have the same module; the transmission gear (73) is located between the annular outer gear (71) and the annular inner gear (72); and the transmission gear (73) meshes with the annular outer gear (71) and the annular inner gear (72).

4. The barcode scanner image calibration device according to claim 2 or 3, characterized in that: The combined target (1) further comprises a fourth target (14) and a fifth target (15); the first target (11) is provided with a second symmetry axis (88), the second symmetry axis (88) being perpendicular to the first symmetry axis (87); the fourth target (14) rotates relative to the first target (11) about a fourth axis (94); the fifth target (15) rotates relative to the first target (11) about a fifth axis (95); the fourth target (14) and the fifth target (15) are axially symmetrical relative to the second symmetry axis (88); the fourth axis (94) and the fifth axis (95) are axially symmetrical relative to the second symmetry axis (88); the fourth target (14) and the fifth target (15) are provided with a second linkage structure (22) so that the fourth target (14) and the fifth target (15) always rotate in opposite directions at the same angle when rotating.

5. The barcode scanner image calibration device according to claim 4, characterized in that: The second linkage structure (22) and the first linkage structure (21) adopt the same transmission structure, and the second linkage structure (22) and the first linkage structure (21) are linked with the same indexing hand wheel (20) via the transmission structure.

6. The image calibration device for a barcode scanner according to claim 5, characterized in that: The combined target (1) further comprises a sixth target (16), a seventh target (17), an eighth target (18) and a ninth target (19); the first target (11) is provided with a third symmetry axis (89) and a fourth symmetry axis (90); the third symmetry axis (89) is perpendicular to the fourth symmetry axis (90); the third symmetry axis (89) and the first symmetry axis (87) form an angle of 45 degrees; the sixth target (16) is oriented about the sixth axis (96) relative to the first target ( 11), the seventh target (17) rotates around the seventh axis (97) relative to the first target (11), the sixth target (16) and the seventh target (17) are axially symmetrical with respect to the third symmetry axis (89), the sixth axis (96) and the seventh axis (97) are axially symmetrical with respect to the third symmetry axis (89), the sixth target (16) and the seventh target (17) are provided with a third linkage structure (23) so that the sixth target (16) and the seventh target (17) are The seventh target (17) always rotates in opposite directions at the same angle when rotating, the eighth target (18) rotates around the eighth axis (98) relative to the first target (11), the ninth target (19) rotates around the ninth axis (99) relative to the first target (11), the eighth target (18) and the ninth target (19) are axially symmetrical with respect to the fourth symmetry axis (90), the eighth axis (98) and the ninth axis (99) are axially symmetrical with respect to the fourth symmetry axis (90), the eighth target (18) and the ninth target (19) are provided with a fourth linkage structure (24) so ​​that the eighth target (18) and the ninth target (19) always rotate in opposite directions at the same angle when rotating, and the second axis (92), the third axis (93), the fourth axis (94), the fifth axis (95), the sixth axis (96), the seventh axis (97), the eighth axis (98) and the ninth axis (99) are in the same plane.

7. The barcode scanner image calibration device according to claim 6, characterized in that: The first linkage structure (21), the second linkage structure (22), the third linkage structure (23) and the fourth linkage structure (24) are linked with the same indexing hand wheel (20).

8. The barcode scanner image calibration device according to claim 7, characterized in that: A surface light source is arranged inside or on the back of the combined target (1); the front of the combined target (1) is frosted and a part of the area is screen-printed with matte ink to form a chessboard.

9. The barcode scanner image calibration device according to claim 8, characterized in that: It also includes a second track (49) and a planar target (4), wherein the planar target (4) is arranged on the second track (49), and the combined target (1) is arranged on the first track (3).

10. The image calibration device for a barcode scanner according to claim 9, characterized in that: The tooling table (2) is provided with a rotating table (28), and the rotating table (28) is provided with a fixing groove matching the code scanner (5).

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