Code scanner capable of accurately scanning codes

Abstract

The invention provides a code scanner capable of accurately scanning codes, which comprises a camera unit, a first aiming unit, a second aiming unit and a control unit, a first aiming unit which is arranged side by side with a camera unit and emits a first aiming pattern and a second aiming unit which is arranged in the same column with the camera unit and emits a second aiming pattern are arranged, the first aiming pattern is a horizontal line, and the second aiming pattern is a vertical line. The control unit controls the first aiming unit and the second aiming unit to simultaneously and respectively emit the first aiming pattern and the second aiming pattern, and the coordinate of the cross intersection of the first aiming pattern and the second aiming pattern does not change along with the change of the code scanning distance, so that the accurate position of the aiming point of the code scanning image can be conveniently obtained. In combination with a code scanning image acquired by the camera unit, accurate code scanning can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of code scanning equipment, and in particular to a code scanner capable of accurately scanning codes. Background Art

[0002] At present, all walks of life are using tools such as barcode scanning guns and barcode scanning PDAs for digital entry and management, which greatly facilitates people's lives and improves production and work efficiency.

[0003] Camera-type barcode scanning products are generally composed of lighting, camera, Aimer indicator and decoder board. The lighting is used to fill light, the Aimer is used to indicate the barcode to be scanned, the camera is used to collect images, and the decoder board is used to decode the image into barcode content. In some scenarios, there may be many barcodes. Due to the limitation of space size, these barcodes will be arranged densely. At this time, there is a need for accurate scanning, that is, the user needs the barcode scanning device to only read the barcode aimed at by the Aimer, and not read other barcodes that are not aimed at. However, when the camera collects images, in order to avoid the Aimer spot affecting the decoding, the Aimer will be turned off when each frame of the image starts to form, and the Aimer will be turned on when the imaging stops. Therefore, the camera cannot see the Aimer in the picture, so the decoding software cannot know the coordinates of the Aimer in the image in real time. The existing method will pre-save the position of the Aimer in the barcode scanning device, and use the saved position information to determine which barcode the Aimer is located in during decoding.

[0004] See also Figure 1 , the lighting 100, camera 200 and Aimer 300 of most existing barcode scanners are arranged on the same horizontal line. Since the Aimer and the camera are not coaxially designed but parallel axis designed, the coordinate position of the Aimer in the picture is not fixed but variable. Figure 2 , assuming that the length direction of the barcode scanner is the X axis and the width direction of the barcode scanner is the Y axis, at different scanning distances, the cross Aimer in the camera imaging image, y1=y2, x1≠x2, as the scanning distance changes, the farther the object is, the closer the x coordinate is to the image center; the closer the object is, the closer the x coordinate is to the image edge. Since the barcode scanner cannot obtain the exact position of the Aimer, it is impossible to achieve accurate scanning based on the pre-saved Aimer position. Summary of the invention

[0005] In view of the problem in the prior art that the barcode scanner cannot obtain the accurate position of the Aimer and cannot achieve accurate barcode scanning, the present invention provides a barcode scanner that can accurately scan the barcode.

[0006] A barcode scanner capable of accurately scanning a barcode of the present invention comprises a camera unit, a first aiming unit, a second aiming unit and a control unit, wherein the first aiming unit and the camera unit are arranged side by side, the first aiming unit emits a first aiming pattern, the first aiming pattern is a horizontal line, the second aiming unit and the camera unit are arranged in the same column, the second aiming unit emits a second aiming pattern, the second aiming pattern is a vertical line, an input end of the first aiming unit and an input end of the second aiming unit are both electrically connected to the control unit, the control unit controls the first aiming unit and the second aiming unit to respectively emit the first aiming pattern and the second aiming pattern simultaneously, the input end of the camera unit is electrically connected to the control unit, and the control unit controls the camera unit to collect a scanned barcode image.

[0007] Preferably, when the control unit controls the camera unit to capture the scanned code image, the control unit controls the first aiming unit not to emit the first aiming pattern and the control unit controls the second aiming unit not to emit the second aiming pattern.

[0008] Preferably, the first aiming unit includes a first aimer, the second aiming unit includes a second aimer, the imaging unit includes a camera, the center of the first aimer and the center of the camera are located on the same horizontal line, and the center of the second aimer and the center of the camera are located on the same vertical line.

[0009] Preferably, the barcode scanner further includes a decoding unit, the input end of the decoding unit is electrically connected to the output end of the camera unit to obtain the scanned image. Further, the barcode scanner further includes a storage unit, the storage unit is used to store the position deviation information, and the input end of the decoding unit is electrically connected to the output end of the storage unit to obtain the position deviation information.

[0010] Preferably, the barcode scanner further comprises an illumination unit, the illumination unit and the camera unit are arranged side by side, and an input end of the illumination unit is electrically connected to the control unit. Further, the illumination unit and the first aiming unit are respectively located on both sides of the camera unit.

[0011] Preferably, the first aiming unit is located directly to the right or to the left of the camera unit, and the second aiming unit is located directly below or above the camera unit.

[0012] Compared with the prior art, the present invention provides a barcode scanner capable of accurately scanning a barcode, by providing a first aiming unit that is arranged side by side with a camera unit and emits a first aiming pattern, and a second aiming unit that is arranged in the same column as the camera unit and emits a second aiming pattern. The first aiming pattern is a horizontal line, and the second aiming pattern is a vertical line. The control unit controls the first aiming unit and the second aiming unit to respectively emit the first aiming pattern and the second aiming pattern at the same time. The coordinates of the cross point of the first aiming pattern and the second aiming pattern will not change with the change of the scanning distance, so as to facilitate obtaining an accurate aiming point position of the scanning image. Combined with the scanning image obtained by the camera unit, accurate scanning can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a barcode scanner in the prior art.

[0015] Figure 2 for Figure 1 perspective view.

[0016] Figure 3 This is a schematic diagram of the structure of a barcode scanner capable of accurately scanning a barcode according to an embodiment of the present invention.

[0017] Figure 4 This is a system structure diagram of a barcode scanner capable of accurately scanning a barcode according to an embodiment of the present invention.

[0018] Figure 5 for Figure 3 perspective view. DETAILED DESCRIPTION

[0019] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] Please refer to Figure 3 , Figure 4 and Figure 5A barcode scanner capable of accurately scanning a barcode of the present invention comprises a camera unit 10, a first aiming unit 20, a second aiming unit 30 and a control unit 40, wherein the first aiming unit 20 is arranged side by side with the camera unit 10, and the first aiming unit 20 emits a first aiming pattern, which is a horizontal line, the second aiming unit 30 is arranged in the same column as the camera unit 10, and the second aiming unit 30 emits a second aiming pattern, which is a vertical line, an input end of the first aiming unit 20 and an input end of the second aiming unit 30 are both electrically connected to the control unit 40, the control unit 40 controls the first aiming unit 20 and the second aiming unit 30 to respectively emit the first aiming pattern and the second aiming pattern at the same time, so as to determine the aiming point position of the scanned barcode image through the coordinates of the cross intersection point of the first aiming pattern and the second aiming pattern, the input end of the camera unit 10 is electrically connected to the control unit 40, and the control unit 40 controls the camera unit 10 to collect the scanned barcode image.

[0022] See also Figure 5 , the length direction of the barcode scanner is the X-axis, the width direction of the barcode scanner is the Y-axis, the length direction is the direction in which the first aiming unit 20 and the camera unit 10 are arranged side by side, and the width direction is the direction in which the second aiming unit 30 and the camera unit are arranged in the same column. In actual use, the length direction is the horizontal direction, and the width direction is the vertical direction. Figure 3 For example, the first aiming unit 20 is located right to the camera unit 10, and the second aiming unit 30 is located below the camera unit 40. Of course, the first aiming unit 20 may also be located to the left of the camera unit 10, and the second aiming unit 30 may also be located above the camera unit 40. There are four combinations of the positions of the first aiming unit 20 and the second aiming unit 30, which will not be described in detail in the present invention.

[0023] The y coordinate of the first aiming unit 20 is consistent with the y coordinate of the camera unit 10. The first aiming unit 20 emits horizontal lines, and its y coordinate does not change with the change of the code scanning distance; the x coordinate of the second aiming unit 30 is consistent with the x coordinate of the camera unit 10. The second aiming unit 30 emits vertical lines, and its x coordinate does not change with the change of the code scanning distance; when the first aiming unit 20 and the second aiming unit 30 respectively emit the first aiming pattern and the second aiming pattern at the same time, the coordinates of the cross intersection of the two aiming patterns are fixed in the coordinate system (the cross intersection of the two aiming patterns is located at the center of the screen, that is, the center of the code scanning image), and will not change with the change of the distance, so that the accurate aiming point position of the code scanning image can be obtained. Combined with the code scanning image obtained by the camera unit 10, accurate code scanning can be achieved.

[0024] In order to prevent the aiming pattern from affecting decoding, when the control unit 40 controls the camera unit 10 to capture the scanned code image, the control unit 40 controls the first aiming unit 20 not to emit the first aiming pattern and the control unit 40 controls the second aiming unit 30 not to emit the second aiming pattern.

[0025] In order to ensure that the aiming point of the scanned code image is located at the center of the scanned code image, the first aiming unit 20 includes a first aimer, the second aiming unit 30 includes a second aimer, the camera unit 10 includes a camera, the center of the first aimer and the center of the camera are located on the same horizontal line, and the center of the second aimer and the center of the camera are located on the same vertical line, so that the optical axis of the first camera unit 10 and the optical axis of the first aiming unit 20 are located on the same horizontal plane, and the optical axis of the first camera unit 10 and the optical axis of the second aiming unit 30 are located on the same vertical plane. In actual use, the first aimer and the second aimer can be laser aimers.

[0026] When the scanning image aiming point is at the center of the scanning image, see Figure 4 The barcode scanner also includes a decoding unit 50, the input end of the decoding unit 50 is electrically connected to the output end of the camera unit 10 to obtain the scanned image. The decoding unit 50 can obtain the position of the aiming point of the scanned image according to the length and width of the scanned image, and decode the corresponding barcode at the position.

[0027] When there are manufacturing tolerances during the production of the barcode scanner, resulting in the aiming point of the scanned image not being located at the center point of the scanned image, the barcode scanner also includes a storage unit 60, which is used to store position deviation information. The position deviation information may include horizontal position deviation information and vertical position deviation information. The input end of the decoding unit 50 is electrically connected to the output end of the storage unit 60 to obtain the position deviation information. The decoding unit 50 obtains the position of the aiming point of the scanned image according to the position deviation information, and decodes the corresponding barcode at the position to achieve accurate decoding.

[0028] In order to ensure that the camera unit 10 can obtain clear scanned code images even in low light conditions, please refer to Figure 4 The barcode scanner also includes a lighting unit 70, which is arranged side by side with the camera unit 10. The input end of the lighting unit 70 is electrically connected to the control unit 40 so that the control unit 40 can control the lighting unit 70 to provide fill light in an environment with insufficient light.

[0029] Furthermore, in order to ensure that the barcode to be decoded is located in the middle of the scanned barcode image as much as possible, the lighting unit 70 and the first aiming unit 20 are respectively located on both sides of the camera unit 10.

[0030] A barcode scanner capable of accurately scanning a barcode is provided in the present invention. A first aiming unit is arranged side by side with a camera unit and emits a first aiming pattern, and a second aiming unit is arranged in the same column with the camera unit and emits a second aiming pattern. The first aiming pattern is a horizontal line, and the second aiming pattern is a vertical line. A control unit controls the first aiming unit and the second aiming unit to respectively emit the first aiming pattern and the second aiming pattern simultaneously. The coordinates of the cross point of the first aiming pattern and the second aiming pattern will not change with the change of the scanning distance, so that an accurate aiming point position of the scanning image is obtained. Combined with the scanning image obtained by the camera unit, accurate scanning can be achieved.

[0031] The present invention has been described by the above-mentioned relevant embodiments, but the above-mentioned embodiments are only examples for implementing the present invention. In addition, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A barcode scanner capable of accurately scanning a barcode, characterized in that: It includes a camera unit, a first aiming unit, a second aiming unit and a control unit, the first aiming unit and the camera unit are arranged side by side, the first aiming unit emits a first aiming pattern, the first aiming pattern is a horizontal line, the second aiming unit and the camera unit are arranged in the same column, the second aiming unit emits a second aiming pattern, the second aiming pattern is a vertical line, the input end of the first aiming unit and the input end of the second aiming unit are both electrically connected to the control unit, the control unit controls the first aiming unit and the second aiming unit to respectively emit the first aiming pattern and the second aiming pattern simultaneously, the input end of the camera unit is electrically connected to the control unit, and the control unit controls the camera unit to collect scanned code images.

2. A barcode scanner capable of accurately scanning a barcode as claimed in claim 1, characterized in that: When the control unit controls the camera unit to capture a scanned code image, the control unit controls the first aiming unit not to emit a first aiming pattern and the control unit controls the second aiming unit not to emit a second aiming pattern.

3. A barcode scanner capable of accurately scanning a barcode as claimed in claim 1, characterized in that: The first aiming unit includes a first aimer, the second aiming unit includes a second aimer, the imaging unit includes a camera, the center of the first aimer and the center of the camera are located on the same horizontal line, and the center of the second aimer and the center of the camera are located on the same vertical line.

4. The barcode scanner capable of accurately scanning a barcode as claimed in claim 1, characterized in that: It also includes a decoding unit, the input end of the decoding unit is electrically connected to the output end of the camera unit to obtain a scanned code image.

5. A barcode scanner capable of accurately scanning a barcode as claimed in claim 4, characterized in that: It also includes a storage unit, which is used to store position deviation information. The input end of the decoding unit is electrically connected to the output end of the storage unit to obtain the position deviation information.

6. The barcode scanner capable of accurately scanning a barcode as claimed in claim 1, characterized in that: It also includes a lighting unit, which is arranged side by side with the camera unit, and an input end of the lighting unit is electrically connected to the control unit.

7. A barcode scanner capable of accurately scanning a barcode as claimed in claim 6, characterized in that: The lighting unit and the first aiming unit are respectively located on two sides of the camera unit.

8. The barcode scanner capable of accurately scanning a barcode as claimed in claim 1, characterized in that: The first aiming unit is located right or left of the camera unit, and the second aiming unit is located below or above the camera unit.

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