CN107066908B - Bar code scanning device with double trigger modes - Google Patents
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- CN107066908B CN107066908B CN201611214701.0A CN201611214701A CN107066908B CN 107066908 B CN107066908 B CN 107066908B CN 201611214701 A CN201611214701 A CN 201611214701A CN 107066908 B CN107066908 B CN 107066908B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10712—Fixed beam scanning
- G06K7/10722—Photodetector array or CCD scanning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1413—1D bar codes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/146—Methods for optical code recognition the method including quality enhancement steps
- G06K7/1478—Methods for optical code recognition the method including quality enhancement steps adapting the threshold for pixels in a CMOS or CCD pixel sensor for black and white recognition
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Abstract
A barcode scanning device with a dual trigger mode includes a first trigger source and a second trigger source, each generating a corresponding interrupt. The central processing unit starts corresponding decoding modes according to the received interrupt, and different decoding modes have different lighting and aiming modes which are suitable for different types of bar codes, so that a user and equipment can conveniently recognize the bar codes. When the mobile terminal is in a certain decoding mode, the bar code decoding coordination module is accessed to a corresponding interface of the bar code decoding chip, and decoding attempt is only needed to be performed from a partial decoding library of the bar code decoding chip, so that the decoding attempt times are reduced, the decoding time is shortened, and the decoding efficiency is improved.
Description
Technical Field
The invention relates to a barcode scanning device with multiple operation modes, in particular to a barcode scanning device with a double-trigger mode.
Background
The bar code comprises a one-dimensional bar code and a two-dimensional bar code, and has the advantages of easy error correction, large capacity of portable information and low manufacturing cost, so that the bar code is widely applied to the automatic identification fields of industrial process control, warehouse logistics, postal management and the like. In the process management, the bar code is rapidly and successfully identified, so that the improvement of the working efficiency has great practical significance. One-dimensional bar codes and two-dimensional codes are generally used for checking and tracing commodities, and the one-dimensional codes are generally used as carriers of price data and product models due to limited data carrying capacity. The two-dimensional code has the advantage of larger information bearing capacity and can be used as a record carrier of processes in the production and transportation processes. Both of these symbols are typically present in the package of the article of commerce.
In the prior art, the barcode scanning device adopts a single-trigger mode, such as a single-board computer, and single-button triggering. In the face of the situation that the types of barcodes in the current commodity package are gradually increased and various barcode combinations gradually emerge, when one-dimensional and/or two-dimensional barcodes capable of being scanned and identified simultaneously exist on the surface of the commodity package, which barcode needs to be identified and fed back to a user, the application of the single-trigger mode is slightly insufficient. In the single-trigger mode, the bar code reading device cannot identify the one-dimensional bar code or the two-dimensional bar code as the artificial intelligence, and the decoding attempt can be performed one by one only through the stored decoding algorithm of all the bar codes until the decoding is successful. This results in a waste of decoding resources and thus increases decoding time. When a certain bar code is similar to other types of bar code features, erroneous decoded information is easily generated to some extent.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that in the prior art, the bar code decoding equipment in a single-trigger mode consumes a long time and is easy to generate wrong decoding information.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a barcode scanning device with a dual trigger mode comprises the following modules:
the first trigger source generates a first interrupt, the central processing unit receives the first interrupt and commands the bar code reading module to execute a first decoding mode;
the second trigger source generates a second interrupt, the central processing unit receives the second interrupt and commands the bar code reading module to execute a second decoding mode;
the central processing unit receives the interrupt sent by the first trigger source or the second trigger source and informs the bar code reading module to start a corresponding decoding mode according to the interrupt;
the bar code reading module comprises: the system comprises a spherical lens, a light filter, a CMOS image sensor, an illumination system and an aiming system, wherein the spherical lens is positioned right in front of the center of a module shell, the light filter is arranged behind the lens, the CMOS image sensor is vertically arranged behind the light filter, and the illumination system and the aiming system are provided with a first decoding mode and a second decoding mode; the first decoding mode includes: a first illumination mode, a first aiming mode; the second decoding mode includes: a second illumination mode, a second aiming mode;
the bar code decoding coordination module is accessed to an interface of a first decoding library of a bar code decoding chip when executing a first decoding mode; when executing the second decoding mode, accessing an interface of a second decoding library of the bar code decoding chip;
the bar code decoding chip is a field programmable gate array and is provided with a first decoding library and a second decoding library, and the first decoding library and the second decoding library are provided with corresponding interfaces to be communicated with the bar code reading module.
The first illumination mode adopts distributed illumination, and the surface of the bar code aimed at in the first aiming mode has a green strip-shaped visible light spot.
The second illumination mode adopts centralized illumination, and the surface of the bar code aimed at in the second aiming mode is provided with a red cross-shaped visible laser spot.
The bar code reading module also comprises a reading feedback reminding mode, and when the first decoding mode or the second decoding mode is decoded successfully, visible light spots different from the first aiming mode and the second aiming mode are generated.
And the module shell is internally provided with a slot for placing the optical filter.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. a barcode scanning device with a dual trigger mode includes a first trigger source and a second trigger source, each generating a corresponding interrupt. The central processing unit starts corresponding decoding modes according to the received interrupt, and different decoding modes have different lighting and aiming modes which are suitable for different types of bar codes, so that a user and equipment can conveniently recognize the bar codes. When the mobile terminal is in a certain decoding mode, the bar code decoding coordination module is accessed to a corresponding interface of the bar code decoding chip, and decoding attempt is only needed to be performed from a partial decoding library of the bar code decoding chip, so that the decoding attempt times are reduced, the decoding time is shortened, and the decoding efficiency is improved.
2. A bar code scanning device with a double-trigger mode is characterized in that a first illumination mode adopts distributed illumination, an image sensor can conveniently illuminate a long-strip one-dimensional bar code to supplement light, and a strip visible light spot can conveniently aim the long-strip one-dimensional bar code.
3. The utility model provides a bar code scanning equipment with two trigger modes, the second illumination mode adopts centralized illumination, makes things convenient for image sensor to the illumination light filling of rectangle two-dimensional bar code, and the cross facula is convenient aims rectangle two-dimensional bar code.
4. A bar code scanning device with a double-trigger mode is characterized in that after a bar code is successfully decoded, visible light spots different from a first aiming mode and a second aiming mode are projected and generated on the surface of the bar code, and a user is intuitively prompted that the bar code is successfully decoded.
5. A light filter is arranged in a module shell in a replaceable mode, and bar code images with different wavelengths can be identified.
Drawings
In order that the present disclosure may be more readily and clearly understood, the following detailed description of the present disclosure is provided in connection with specific embodiments thereof and the accompanying drawings, in which,
FIG. 1 is a system block diagram of a barcode scanning device with dual trigger modes according to the present invention;
FIG. 2 is a schematic diagram of an appearance structure of a barcode scanning device with dual trigger modes according to the present invention;
FIG. 3 is a schematic structural diagram of a barcode reading module of a barcode scanning device with dual-triggering mode according to the present invention;
FIG. 4 is a schematic view of an aiming lens of a barcode reading module of a barcode scanning device with dual-trigger mode according to the present invention;
fig. 5 is a schematic structural diagram of another appearance of a barcode scanning apparatus with a dual-triggering mode according to the present invention.
Reference numerals: 1-a first trigger source; 2-a second trigger source; 3-a central processing unit; 4-Bar code reading
A module; 41-spherical lens; 421-a first illumination mode; 422-a second illumination mode; 431-first sight
Quasi-mode; 432-a second aiming mode; 5-a bar code decoding coordination module; 6-bar code decoding chip.
Detailed Description
A barcode scanning device with a dual-trigger mode is disclosed in FIGS. 1 and 2, and comprises the following modules:
the first trigger source 1 generates a first interrupt, the central processing unit receives the first interrupt, and the central processing unit commands the bar code reading module to execute a first decoding mode.
And the second trigger source 2 generates a second interrupt, and the central processing unit receives the second interrupt and commands the bar code reading module to execute a second decoding mode.
A hardware interrupt is an asynchronous signal indicating that attention is needed or that a change is needed to perform a synchronous event. Hardware interrupts are a way to avoid wasting valuable processor time in polling cycles, waiting for external events. As a separate system of control lines. The hardware interrupt in the present invention is an external interrupt. First trigger source 1 and second trigger source 2 are as a hardware switch, can set up respectively, also can integrate in a switch (like the trigger of bar code scanning rifle), as shown in fig. 5, and wherein bar code recognition module 4 sets up behind the cover glass, does not show.
And the central processing unit 3 receives the interrupt sent by the first trigger source 1 or the second trigger source 2 and informs the bar code reading module to start a corresponding decoding mode according to the interrupt. In hardware interruption, the central processing unit can automatically turn to an interruption processing program, and compared with software interruption, execution efficiency is improved.
The barcode reading module 4, as also shown in fig. 3, includes: the spherical lens 41 located right in front of the center of the module shell is preferably made of glass lens, and is resistant to high temperature and humidity because the barcode reading environment is not the same as the use environment of digital products such as mobile phones. The reason for arranging the optical filter on the optical filter arranged behind the lens is that the number of pixels and supported colors is continuously improved along with the continuous development of the existing CMOS, and the bar code decoding is used as an industrial application, which needs black and white with higher image sharpness and contrast or a bar code image with a certain specific color, so that light with other unnecessary wavelengths needs to be filtered. And the CMOS image sensor is vertically arranged behind the optical filter. An illumination system having a plurality of white LEDs. And the aiming system is provided with an LED aiming light source and a laser aiming light source, and each aiming lens is arranged on the LED aiming light source and the laser aiming light source. A first decoding mode and a second decoding mode; the first decoding mode includes: a first illumination pattern 421, a first aiming pattern 431; the second decoding mode includes: a second illumination pattern 422, and a second aiming pattern 432.
The bar code decoding coordination module 5 is accessed to an interface of a first decoding library of a bar code decoding chip when executing a first decoding mode; when the second decoding mode is executed, the interface of the second decoding library of the bar code decoding chip is accessed. A prior art signal coordination module may be employed.
The bar code decoding chip 6 is a field programmable gate array and is provided with a first decoding library and a second decoding library, and the first decoding library and the second decoding library are provided with corresponding interfaces to be communicated with the bar code reading module. A 0390 chip from the new continental computer shares company may be used. Compared with the traditional CPU or MCU matched with RAM and ROM to decode the bar code through a software decoding algorithm, the hardware decoding speed is improved by many times because of adopting a pure hardware circuit.
A barcode scanning device with a dual trigger mode includes a first trigger source and a second trigger source, each generating a corresponding interrupt. The central processing unit starts corresponding decoding modes according to the received interrupt, and different decoding modes have different lighting and aiming modes which are suitable for different types of bar codes, so that a user and equipment can conveniently recognize the bar codes. When the mobile terminal is in a certain decoding mode, the bar code decoding coordination module is accessed to a corresponding interface of the bar code decoding chip, and decoding attempt is only needed to be performed from a partial decoding library of the bar code decoding chip, so that the decoding attempt times are reduced, the decoding time is shortened, and the decoding efficiency is improved.
The first illumination mode 421 employs distributed illumination, with a green bar-shaped visible spot on the bar code surface being aimed at in the first aiming mode 431. The aiming of the strip-shaped one-dimensional bar code is convenient. The lens for generating the green strip-shaped visible light spots is a columnar acrylic or glass lens. And the green LED can form a strip-shaped visible light spot through the lens.
The second illumination mode 422 uses concentrated illumination and the second aiming mode 432 has a red cross-shaped visible laser spot on the surface of the bar code being aimed at. The cross-shaped light spot is convenient for aiming the rectangular two-dimensional bar code. A diffractive lens can be adopted, as shown in fig. 4, the lens body is transparent, and one side of the lens body is smooth; the other side is divided into an upper subarea and a lower subarea by a diagonal line, namely an area A and an area B; wherein:
the area A is divided into six areas with equal height from top to bottom, the first area is a twill surface, the second area is a smooth surface, and the other areas are sequentially and repeatedly arranged according to the sequence of the twill surface and the smooth surface;
and the area B is divided into six areas with equal width from left to right, the first area is a smooth surface, the second area is a twill surface, and the rest areas are sequentially and repeatedly arranged by the smooth surface and the twill surface in sequence.
The bar code reading module also comprises a reading feedback reminding mode, and when the first decoding mode or the second decoding mode is decoded successfully, visible light spots different from the first aiming mode and the second aiming mode are generated. Which may be a circular lens, the projection creates a dot. Or a patterned diffractive lens, to create a patterned spot, such as a manufacturer logo. Such as "OK" words, etc. And visually prompting the user that the bar code is successfully decoded.
And the module shell is internally provided with a slot for placing the optical filter. The user can replace the optical filter conveniently.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (3)
1. A barcode scanning device with a dual trigger mode is characterized by comprising the following modules:
the first trigger source generates a first interrupt, the central processing unit receives the first interrupt and commands the bar code reading module to execute a first decoding mode;
the second trigger source generates a second interrupt, the central processing unit receives the second interrupt and commands the bar code reading module to execute a second decoding mode;
the central processing unit receives the interrupt sent by the first trigger source or the second trigger source and informs the bar code reading module to start a corresponding decoding mode according to the interrupt;
the bar code reading module, the bar code reading module contains: the system comprises a spherical lens, a light filter, a CMOS image sensor, a lighting system and a sighting system, wherein the spherical lens is positioned right in front of the center of a module shell;
the bar code reading module is provided with a first decoding mode and a second decoding mode; wherein the first decoding mode includes a first illumination mode and a first aiming mode; the second decoding mode includes a second illumination mode and a second aiming mode;
the first illumination mode adopts distributed illumination, and in the first aiming mode, the aimed bar code surface has green strip-shaped visible light spots;
the second illumination mode adopts centralized illumination, and in the second aiming mode, the aimed bar code surface has red cross visible laser spots;
the bar code decoding coordination module is accessed to an interface of a first decoding library of a bar code decoding chip when executing a first decoding mode; when executing the second decoding mode, accessing an interface of a second decoding library of the bar code decoding chip;
the bar code decoding chip is a field programmable gate array and is provided with a first decoding library and a second decoding library, and the first decoding library and the second decoding library are provided with corresponding interfaces to be communicated with the bar code reading module.
2. The barcode scanning device of claim 1, wherein the barcode reading module further comprises a reading feedback reminding mode, and in the reading feedback reminding mode, when the first decoding mode or the second decoding mode is decoded successfully, the barcode reading module generates a visible light spot different from the first aiming mode and the second aiming mode.
3. The barcode scanning device of claim 2, wherein the module housing has a slot for placing the optical filter.
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| WO2019169517A1 (en) * | 2018-03-04 | 2019-09-12 | 无锡盈达聚力科技有限公司 | Barcode recognition component and barcode recognition device |
| CN109522763A (en) * | 2018-09-06 | 2019-03-26 | 深圳盈达信息科技有限公司 | A kind of method of sight and its sighting device of bar code reader |
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| CN103366149B (en) * | 2013-06-05 | 2017-05-31 | 北京奇付通科技有限公司 | The method and apparatus that mobile terminal processes visual graphic code |
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| CN1648931A (en) * | 2004-01-20 | 2005-08-03 | 深圳市朗科科技有限公司 | Decoding device and method for bar code |
| CN102741864A (en) * | 2011-09-28 | 2012-10-17 | 华为技术有限公司 | Multilayer quick response code image encoding/decoding method and encoding/decoding device |
| CN202815862U (en) * | 2012-08-21 | 2013-03-20 | 深圳市华阳信通科技发展有限公司 | Bar code recognizing-and-reading apparatus having double read heads |
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| CN105631383A (en) * | 2015-12-30 | 2016-06-01 | 福建联迪商用设备有限公司 | Intelligent gating bar code decoding method and system |
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