CN202171812U

CN202171812U - Bar code identification device

Info

Publication number: CN202171812U
Application number: CN2011202354534U
Authority: CN
Inventors: 蒋旭锋; 刘志伟; 谢朝晖
Original assignee: BEIJING ACCTRUE TECHNOLOGY Co Ltd
Current assignee: BEIJING ACCTRUE TECHNOLOGY Co Ltd
Priority date: 2011-07-05
Filing date: 2011-07-05
Publication date: 2012-03-21
Anticipated expiration: 2021-07-05

Abstract

The present utility model provides a bar code identification device. The device comprises a camera group, the camera group is composed of more than one camera and used for colleting picture signals (including bar codes) of to-be-detected articles; a bar code identification unit group which comprises more than one bar code identification unit, the bar code identification units are respectively connected with the cameras of the camera group and used for carrying out the bar code identification of the picture signals and generating digital signals indicating the code bars; and a bar code combination unit which is connected with the bar code identification unit group and used for combining the digital signals indicating the bar codes and converting the digital signals into required formats. In the device, by identifying, combining and displaying the bar codes shot by a plurality of cameras, the reading of all the shot bar codes can be realized.

Description

Bar code recognition device

Technical Field

The utility model relates to a bar code recognition device.

Background

The bar code has the advantages of large capacity, high confidentiality, capability of realizing form storage of electronic pictures and the like. Nowadays, the method is increasingly applied to the aspects of data, information record, bill anti-counterfeiting, stock checking and the like. The existing technology for recognizing bar codes is realized by a bar code scanner or a vision technology, namely an industrial camera. However, when a plurality of barcodes are arranged on the package of the object to be detected, the number of the barcodes read by a barcode scanner is limited, and a common barcode scanner cannot read a plurality of barcodes at one time, so that the barcodes are read by an industrial camera, and therefore, a camera with high pixels and large depth of field is required to be used, and the cost is inevitably increased. The technical scheme of the existing solution is as follows: the bar code is identified using a plurality of industrial cameras. However, in the existing multi-industry camera bar code identification technology, the sub-industry cameras send identification results to an upper computer used by a user, and the multi-industry camera bar code identification technology cannot realize logical combination and then send the bar code identified by the multi-industry camera.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a barcode recognition device, which recognizes and combines barcodes photographed by a plurality of cameras to display the barcodes, thereby reading all barcodes photographed.

The utility model provides a bar code recognition device includes:

a camera group 30 including one or more cameras for acquiring image signals including bar codes of an object to be inspected;

a barcode recognition unit group 40, including one or more barcode recognition units, connected to each camera in the camera group 30, for performing barcode recognition on the image signal to generate a digital signal representing a barcode;

and the bar code combination unit 50 is connected with the bar code identification unit group 40 and is used for converting the digital signals representing the bar codes into a required format after being combined.

In this way, the barcodes photographed by the plurality of cameras are identified, combined, and displayed, thereby reading all the photographed barcodes.

Optionally, the barcode identification apparatus further includes:

a position detection unit 10 for detecting whether the article to be inspected passes through;

and a camera group control unit 20 connected to the position detection unit 10, for outputting a control command to the camera group 30 when the position detection unit 10 detects that the object to be inspected passes through.

Therefore, when the object to be detected passes through, the device can automatically detect the position of the object to be detected so as to send a control instruction to control the camera unit 30 to automatically shoot.

Wherein the position detection unit 10 includes:

a light emitting end for emitting light;

and the light absorption end is used for detecting whether the object to be detected passes through or not according to whether the light emitted by the light emission end is received or not.

Therefore, the position of the article to be detected is detected.

Wherein the camera group control unit 20 includes:

a signal amplifier connected to the position detecting unit 10 for amplifying a signal indicating whether the object to be inspected passes or not;

and the A/D converter is connected with the signal amplifier and is used for carrying out analog-to-digital conversion on the amplified signal representing whether the object to be detected passes or not into a digital signal representing a control command.

Therefore, the signal representing the passing of the object to be detected is amplified and converted, and the standard digital signal is output.

Optionally, the camera includes:

the control module 301 is connected with the camera group control unit 20, and is used for receiving a control instruction and outputting a corresponding control signal;

the image sensing module 302 is connected with the control module 301 and is used for acquiring an image of the article to be detected according to the control signal;

an image processing module 303, connected to the image sensing module 302, for converting the image into a digital signal representing an image of the object to be inspected;

a storage module 304, connected to the image processing module 303, is used for storing the digital signal representing the image of the object to be inspected.

Therefore, the acquisition and the generation of the image signals of the object to be detected are realized.

Optionally, the barcode combining unit 50 includes:

the bar code receiving control module is connected with the bar code identification unit group 40 and is used for controlling and receiving digital signals which are output by each bar code identification unit and represent bar codes according to a certain time sequence;

and the bar code combination module is connected with the bar code receiving control module and is used for combining the digital signals representing the bar codes and converting the digital signals into a required format.

Therefore, the bar codes on the articles to be detected can be identified and recombined to be displayed.

Drawings

Fig. 1 is a schematic structural diagram of a barcode recognition device of the present invention;

fig. 2 is a schematic diagram of the internal structure of the camera of the present invention;

fig. 3 is a flowchart illustrating the operation of the barcode recognition apparatus of the present invention.

Detailed Description

Fig. 1 shows a schematic structural diagram of a barcode recognition device of the present invention, which includes: the system comprises a position detection unit 10, a camera group control unit 20, a camera group 30, a bar code identification unit group 40, a bar code combination unit 50 and an upper computer. Wherein,

a position detecting unit 10 for detecting a position of the object to be inspected, and generating a corresponding signal when the object to be inspected is transferred to an area detected by the position detecting unit 10. The position detection unit 10 may be a photoelectric sensor. The photoelectric sensor comprises a light emitting end and a light absorbing end. The light signal emitted from the light emitting end is absorbed by the light absorbing end, resulting in a high level. When the object to be detected passes through the detection area, the light is blocked, and the high level is converted into the low level to be output. Therefore, the light absorption end cannot completely absorb the light, level jump is generated, and a corresponding signal is generated.

And the camera group control unit 20 is connected to the position detection unit 10, and is configured to receive the signal from the position detection unit 10, generate a corresponding control instruction, and output the control instruction to control the cameras in the camera group 30 to perform shooting, where the instruction may be a switching value signal 0 or 1. The camera group control unit 20 includes a signal amplifier and an a/D converter connected in sequence.

The signal amplifier is used for receiving the signal which is generated by the position detection unit 10 and indicates whether the object to be detected passes or not, and amplifying the signal.

The A/D converter is used for receiving the signal which is amplified by the signal amplifier and indicates whether the object to be detected passes or not, performing analog-to-digital conversion on the detection signal, converting the detection signal into a standard digital signal (1 or 0), namely a control command, and outputting the standard digital signal.

And the camera set 30 is connected with the camera set control unit 20 and is used for receiving the control command, such as a switching value control signal, and shooting. The camera set 30 includes a plurality of cameras, and a plurality of angles are set for the positions of the objects to be inspected. As shown in fig. 2, each camera includes at least: a control module 301, an image sensing module 302, an image processing module 303, and a storage module 304.

The control module 301 is configured to receive the standard digital signal, perform an inspection, and output a control signal to the image sensing module 302 according to an inspection result.

The image sensing module 302 is connected to the control module 301, and is configured to receive the control signal output by the control module 301, collect an image of the object to be detected, and generate an image signal. The working principle is as follows: after the light source (e.g., when the flash lamp is turned on) emitted by the image sensing module 302 irradiates the object to be inspected, the reflected light thereof is projected onto the surface layer of the image sensing module 302 through the optical lens, and is decomposed into different color lights by the filter on the surface layer of the image sensing module 302. The color light is sensed by the photosensitive element, analog electric signals with different intensities representing images of the object to be detected are generated, and the analog electric signals are collected and uniformly output by the photosensitive element.

The image processing module 303 is connected to the image sensing module 302, and is configured to receive the analog electrical signal output by the image sensing module 302, perform analog-to-digital conversion, and convert the analog electrical signal into a digital signal representing an image of an object to be detected. And the digital signal is subjected to color correction and white balance processing and is encoded into an image format and resolution supported by the camera. The generated image information is transmitted to the storage module 304 and the barcode identification unit group 40, respectively.

The barcode recognition unit group 40 includes a plurality of barcode recognition units, one by one connected to the cameras in the camera group 30, and is configured to receive the image signal, scan the image signal, and perform barcode recognition. The working principle is as follows: after the light source emitted by the bar code identification unit irradiates the inverted image information, the reflected light passes through the lens and is converged on the scanning module, the scanning module converts the optical signal into an analog signal, and the analog signal is converted into a digital signal representing the bar code through the analog-to-digital conversion circuit and is output.

The barcode combining unit 50 includes a barcode receiving control module and a barcode combining module (not shown) connected in sequence. The barcode receiving control module is connected to the barcode identification unit group 40, and is configured to control a time sequence of receiving a digital signal representing a barcode output by each barcode identification unit. Specifically, a data receiving time sequence is arranged in the bar code receiving control module, and the bar code receiving control module sequentially accesses the bar code identification unit to exchange data until all digital signals representing the bar codes are received. The bar code combination module is used for receiving the digital signals received by the bar code receiving control module, combining all the digital signals representing the bar codes, converting the digital signals into formats required by the upper computer, such as image formats, texts, sound formats and the like, and outputting the formats to the upper computer.

The working principle of the present invention is described below, as shown in fig. 3, including the following steps:

s1: and powering on the device, and entering a scanning mode of the object to be detected.

S2: if the light receiving end in the position detecting unit 10 cannot normally receive light, it indicates that the object to be detected passes through, and the light receiving end generates a level jump and generates a detection signal, and the process goes to step S3. If the light receiving end normally receives the light emitted by the light receiving end, the object to be detected does not pass through, and the detection is continued.

S3: the camera group control unit 20 receives the corresponding signal generated by the detection unit 10, amplifies and performs analog-to-digital conversion on the corresponding signal, converts the signal into a control command, and outputs the control command to the camera group 30. The control module 301 of the camera set 30 receives the control signal, controls the image sensing module 302 to collect an image of the object to be detected, generates an analog signal, transmits the analog signal to the image processing module 303, and generates image information.

S4: the barcode recognition unit group 40 scans the image information generated by the camera group 30 one by one and performs barcode recognition, thereby generating a digital signal indicating a barcode.

S5: the barcode receiving control module in the barcode combining unit 50 sequentially accesses the barcode identifying unit to perform data exchange, reads a digital signal representing the barcode, and transmits the digital signal to the barcode combining module. The bar code combination module combines all the digital signals representing the bar codes, converts the digital signals into a format required by the upper computer and outputs the converted digital signals to the upper computer.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bar code identification device, comprising:

a camera group (30) comprising more than one camera for acquiring image signals including bar codes of the object to be detected;

a barcode recognition unit group (40) including one or more barcode recognition units, each connected to each camera in the camera group (30), for performing barcode recognition on the image signal to generate a digital signal representing a barcode;

and the bar code combination unit (50) is connected with the bar code identification unit group (40) and is used for converting the digital signals representing the bar codes into a required format after being combined.

2. The bar code identification device according to claim 1, further comprising:

a position detection unit (10) for detecting whether the article to be inspected passes through;

and the camera group control unit (20) is connected with the position detection unit (10) and is used for outputting a control instruction to the camera group (30) when the position detection unit (10) detects that the object to be detected passes through.

3. The bar code recognition device according to claim 2, wherein the position detection unit (10) includes:

a light emitting end for emitting light;

4. The barcode recognition device according to claim 2, wherein the camera group control unit (20) includes:

the signal amplifier is connected with the position detection unit (10) and is used for amplifying a signal which represents that the object to be detected passes through;

and the A/D converter is connected with the signal amplifier and is used for carrying out analog-to-digital conversion on the amplified signal representing the passing of the object to be detected into a digital signal representing a control command.

5. The barcode recognition device according to claim 2, wherein the camera comprises:

the control module (301) is connected with the camera group control unit (20) and used for receiving a control instruction and outputting a corresponding control signal;

the image sensing module (302) is connected with the control module (301) and is used for acquiring an image of the article to be detected according to the control signal;

the image processing module (303) is connected with the image sensing module (302) and is used for converting the image into a digital signal representing the image of the object to be detected;

and the storage module (304) is connected with the image processing module (303) and is used for storing the digital signals representing the image of the object to be detected.

6. The barcode recognition apparatus according to claim 1, wherein the barcode combining unit (50) comprises:

the bar code receiving control module is connected with the bar code identification unit group (40) and used for controlling and receiving digital signals which are output by each bar code identification unit and represent bar codes according to a certain time sequence;