CN114239619A - Bar code scanning device with multiple lighting modes - Google Patents
Bar code scanning device with multiple lighting modes Download PDFInfo
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- CN114239619A CN114239619A CN202111545050.4A CN202111545050A CN114239619A CN 114239619 A CN114239619 A CN 114239619A CN 202111545050 A CN202111545050 A CN 202111545050A CN 114239619 A CN114239619 A CN 114239619A
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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
- G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
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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
- G06K7/10732—Light sources
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
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- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
Abstract
According to the bar code scanning device with multiple illumination modes, the anti-reflection and anti-reflection chemical coating films are coated on the outer surface and the inner surface of the reading transparent screen, so that light emitted by the illumination light supplementing light source can be effectively prevented from being reflected to the imaging component through the reading transparent screen to cause imaging light pollution, and reflected light of an external bar code image is also effectively prevented from being reflected on the outer surface of the reading transparent screen and being incapable of being refracted to the imaging component through the reading transparent screen. The outer surface of the screen is penetrated in the recognition and reading process and is plated with the anti-fingerprint chemical plating film, so that the phenomenon that grease and sweat are left on the screen due to the fact that a finger contacts the screen in the daily mobile phone close-up type scanning process is avoided, and the working state of the imaging assembly is affected due to the fact that the screen is penetrated in the recognition and reading process. The light guide cover with the outward uniform diffusion lighting light supplement light source is matched with the uniformly arranged lamp beads to serve as the lighting light supplement light source, so that illumination generated by the lighting light supplement light source can uniformly support the surface of the bar code to be shot.
Description
Technical Field
The invention relates to a bar code reading and scanning device, in particular to a bar code scanning device with multiple illumination modes.
Background
With the rapid iterative development of mobile networks, the blowout of the number of mobile internet users and more application scenes realized based on mobile terminals continuously emerge. The bar code is also derived from the earliest physical distribution inventory and commodity retail to be used on a mobile payment carrier, and the mobile payment is an enthusiastic payment mode for the national world. One mobile phone can realize payment of various consumption scenes, namely shopping in a vegetable field, ticket purchasing in a station or shopping consumption of a convenience store.
With the popularization of mobile payment, new identification requirements are also put forward on bar code identification equipment. Bar codes on traditional strip flow express bill numbers and the like. Because the bar code device is made of non-luminous materials, the bar code device can enable the printed bar code information to be basically and accurately reflected to an image sensor of the bar code reading device through reflected light by a simple lighting source, and generate corresponding electric signals for a subsequent decoding processor to decode. Due to the self-luminous screen and the high-reflection characteristic of the screen, the bar code displayed on the screen causes that the stray light of the external environment can be reflected into an image sensor in the bar code reading equipment by the conventional bar code equipment due to the high reflection of the surface of the screen, so that the final imaging is fuzzy, and the bar code image cannot be accurately restored. Simultaneously, because the user habit of mobile payment is that the formula is pressed close to and is swept the sign indicating number and read, the unable reading distance so near that covers of camera lens focus of traditional bar code reading equipment, and the reading window of current bar code equipment generally adopts ordinary glass or resin, the ya keli material, because comparatively smooth secondary reflection who causes the bar code image easily, the camera lens that leads to the rear end and image sensor can't catch clear image, the light filling of illumination simultaneously also reflects to image sensor through the reading window easily, arouse that the formation of image is bright, cause the formation of image to disturb.
Disclosure of Invention
In order to solve the technical problems, the invention provides a barcode scanning device with multiple illumination modes, which solves the problems that a mobile phone screen is smooth and easy to reflect light, a reading window is easy to cause secondary bidirectional light reflection, and the close type barcode scanning is not suitable well.
The technical scheme of the invention is as follows:
a barcode scanning device with multiple illumination modes, comprising:
the upper surface and the lower surface of the middle frame shell are provided with openings.
The reading transparent screen is detachably arranged on the upper surface of the middle frame shell, the reading transparent screen surface is overlaid with an anti-fingerprint and anti-reflection chemical coating on the outer surface of the bar code, and the inner surface facing the lens is plated with an anti-reflection chemical coating.
Light guide cover, the cover is established in the center housing, be the loudspeaker form, the great one end of opening with the reading passes through the screen to the contact, and the less one end of opening is used for holding the lens mount, light guide cover changes by setting up the route of marcing of the light that sends when the illumination light filling light source on the circuit board of light guide cover below lights will get into the incident light of light guide cover fills the colour dispersion and produces optical diffusion and pass through the reading passes through the screen outwards scattering.
The circuit board is arranged below the light guide cover, an image sensor slot is formed in the front face of the circuit board, an imaging assembly integrating an image sensor and a lens is connected above the image sensor slot, a lens seat is sleeved outside the imaging assembly and serves as a butt joint device between the imaging assembly and the light guide cover, a plurality of lamp beads are arranged on the surface of the circuit board around the image sensor slot and serve as lighting and light supplementing light sources, and the lighting and light supplementing light sources are controlled to be turned on or off by a processor arranged on the circuit board; the circuit board is also provided with a data interface which is communicated with the outside and supplies power through a cable.
The circuit board is arranged on the upper surface of the lower shell, and the lower shell is arranged at the lower end of the middle frame shell through a connecting device.
Preferably, the processor is configured to control the illumination supplementary lighting source to light at the end of exposure during a time period when the imaging component executes a complete frame of image frame, and the duration of the illumination supplementary lighting source is less than 2 ms.
Preferably, four lateral surfaces of the inner side of the middle frame shell are provided with buckles near the upper end, and a part of the light guide cover horizontally extends outwards from the end with the larger opening to be matched with the buckles, so that the light guide cover is clamped in the middle frame shell.
Preferably, the imaging assembly and the lens mount are further provided with a buffering and positioning gasket which can deform under extrusion, and the middle of the buffering and positioning gasket is a circular hollow so as to fit and accommodate the lens.
Preferably, the lens mount passes through the circuit board through two bilaterally symmetrical screws and is locked in the corresponding screw hole in the lower housing.
Preferably, the front surface of the circuit board is further provided with at least one indicating light source with a color different from the color of the lighting supplementary lighting light source, the indicating light source is in communication connection with the processor and is controlled to be turned on after the barcode is successfully read and decoded, and the processor controls the lighting supplementary lighting light source to be in a non-lighting state while the indicating light source is turned on.
The invention has the following beneficial effects:
1. according to the bar code scanning device with multiple illumination modes, the anti-reflection and anti-reflection chemical coating films are coated on the outer surface and the inner surface of the reading transparent screen, so that light emitted by the illumination light supplementing light source can be effectively prevented from being reflected to the imaging component through the reading transparent screen to cause imaging light pollution, and reflected light of an external bar code image is also effectively prevented from being reflected on the outer surface of the reading transparent screen and being incapable of being refracted to the imaging component through the reading transparent screen. The outer surface of the screen is penetrated in the recognition and reading process and is plated with the anti-fingerprint chemical plating film, so that the phenomenon that grease and sweat are left on the screen due to the fact that a finger contacts the screen in the daily mobile phone close-up type scanning process is avoided, and the working state of the imaging assembly is affected due to the fact that the screen is penetrated in the recognition and reading process. The light guide cover with the outward uniform diffusion lighting light supplement light source is matched with the uniformly arranged lamp beads to serve as the lighting light supplement light source, so that illumination generated by the lighting light supplement light source can uniformly support the surface of the bar code to be shot. The detachable design of imaging component satisfies the image sensor of different specifications and uses with the cooperation of different angle of vision camera lenses, does benefit to the upgrading, need not to make the circuit board again.
2. According to the bar code scanning device with multiple illumination modes, the illumination light supplement light source is fixedly lightened for less than 2ms in the non-exposure time of each frame of image frame, and the short fixed-time light supplement is realized, so that a user looks like that the illumination light supplement is continuous, the illumination is soft, the bar code can be displayed on a screen conveniently and read, and excessive illumination interference can not be generated in the process of generating a digital image by exposure.
3. According to the bar code scanning device with multiple illumination modes, the reading transparent screen is installed in the middle frame shell through the buckle, the installation and the disassembly are simple and convenient, and an additional fixing device is not needed.
4. According to the bar code scanning device with multiple illumination modes, the buffer washer is arranged between the imaging component and the lens mount, so that the imaging component can be stably and seamlessly installed in the lens mount, and displacement and dust falling are not easy to happen in the using process.
5. According to the bar code scanning device with multiple illumination modes, the lens mount is stably installed on the circuit board through two screws and attached to the imaging assembly.
6. The bar code scanning device with the multiple lighting modes is also provided with an indicating light source, and can give visual indication to a user after successful reading.
Drawings
FIG. 1 is a schematic view of a barcode scanning device with multiple illumination modes according to the present invention;
FIG. 2 is an exploded view of a barcode scanning device with multiple illumination modes according to the present invention;
FIG. 3 is a schematic view of a middle frame housing and a light guide cover of a barcode scanning device with multiple illumination modes according to the present invention;
FIG. 4 is an exploded view of a connection between a circuit board and a lens mount of a barcode scanning device with multiple illumination modes according to the present invention;
FIG. 5 is a diagram of a circuit board of a barcode scanning device with multiple illumination modes according to the present invention.
The reference signs are: 1-a middle frame shell; 2-reading through screen; 3-a light guide cover; 4-a lens mount; 5-a circuit board; 6-lower shell; 7-an indicator light source; 11-buckling; 41-buffer positioning washer; 51-image sensor socket; 511-an imaging component; 512-data interface; 52-lamp bead; 53-a cable; 61-cable fixing buckle; 62-sound reminding device.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
A barcode scanning device with multiple illumination modes, as shown in fig. 1-5, comprising:
the upper and lower surfaces of the middle frame shell 1 are provided with openings.
The reading transparent screen 2 is detachably arranged on the upper surface of the middle frame shell 1, the outer surface of the reading transparent screen 2 facing the bar code is overlaid with an anti-fingerprint and anti-reflection chemical coating, and the inner surface of the reading transparent screen facing the lens seat 4 is plated with an anti-reflection chemical coating. The reading transparent screen 2 is preferably made of glass, and the reading transparent screen can be made of acrylic materials.
The light guide cover 3 is made of light diffusion materials such as PMMA, and is sleeved in the middle frame shell 1 and is trumpet-shaped or bowl-shaped. The great one end of opening with the reading passes through screen 2 to the contact, and the less one end of opening is used for holding lens mount 4, light guide cover 3 changes by setting up the route of advancing of the light that sends when the illumination light filling light source on the circuit board 5 of light guide cover 3 below lights, will get into the incident light of light guide cover 3 is filled the colour of dispersion and is produced optical diffusion and sees through the outside scattering of reading passes through screen 2, even irradiation promptly to the bar code surface.
The circuit board 5 sets up the below of leaded light cover 3, circuit board 5 openly is provided with an image sensor slot 51, image sensor slot 51 top detachably is connected with image sensor and integrative formation of image subassembly 511 of camera lens, and the connected mode adopts the mode of slot plug, carries out the transmission of signal of telecommunication, also convenient replacement or upgrading. The imaging assembly 511 adopts the integrated design of the image sensor and the lens, improves the adaptation degree between the lens and the lens, does not need manual secondary assembly, and is beneficial to focal length and imaging. The outside cover of formation of image subassembly 511 is equipped with lens mount 4, lens mount 4 as formation of image subassembly 511 with docking device between the light guide housing 3 still is provided with the aspheric lens on the lens mount, adopts the lens that is not spherical, can reduce the quantity of lens, when reducing weight and reducing the volume, can provide better optical property, can solve glare and corner deformation problem. The aspheric lens has the function of enabling the focal positions formed by the paraxial rays and the paraxial rays to be coincident by modifying the curvature of the surface of the lens. When the paraxial ray and the paraxial ray fall on the same focal plane, the facula disappears, and the imaging sharpness is improved. A plurality of beads 52 are arranged on the surface of the circuit board 5 around the image sensor slot 51 to serve as lighting and supplementary lighting sources, and white LEDs can be adopted. The lighting and supplementary lighting light source is controlled by a processor arranged on the circuit board 5 to be lighted or not. The processor controls the lighting and closing of the lighting and light supplementing light source according to the bar code decoding program and controls the continuous working time sequence. The circuit board 5 is further provided with a data interface 512 for communicating and supplying power with the outside through a cable 53, wherein the cable can be a USB cable, and can also be one of TTL \ RS232 and a virtual serial port.
And the circuit board 5 is mounted on the upper surface of the lower shell 6, and the lower shell 6 is mounted at the lower end of the middle frame shell 1 through a connecting device. The lower shell 6 is provided with a groove for accommodating the cable 53, and the joint is also provided with a cable fixing buckle 61 for fixing the head of the cable 53 to prevent the cable from falling off and causing poor contact.
The processor is configured to control the illumination light supplement light source to trigger the illumination light supplement light source to light at the end of exposure during the time period of the imaging component 511 executing a complete frame of image frame, and the duration of the illumination light supplement light source is less than 2 ms. The method mainly calls a bar code decoding program stored in a flsah storage on the circuit board to execute the logic steps of the related lighting module. The light filling of short fixed duration, make the user seem illumination light filling continuous, and the illuminance is comparatively soft, do benefit to the recognition of screen display bar code, can not produce too much illumination interference at exposure generation digital image in-process, because equipment mainly connects on the USB mouth of host computers such as cash registering terminal, PC, most USB mouths are still USB2.0, output current is little, only 500ma, through such illumination control logic design, help reducing the consumption, the illumination is the biggest consumption of power consumption of equipment.
The four side surfaces of the inner side of the middle frame shell 1 are provided with buckles 11 close to the upper end, and the light guide cover 3 is matched with the buckles 11 by horizontally extending one part outwards from the end with the larger opening, so that the light guide cover 3 is clamped in the middle frame shell 1.
The imaging component 511 and the lens mount 5 are also provided with a buffer positioning washer 41 which can deform under extrusion, and the middle of the buffer positioning washer is a circular hollow so as to fit and accommodate the lens 4.
The lens mount 5 passes through the circuit board 5 through two bilaterally symmetrical screws and is locked in the corresponding screw hole in the lower shell 6.
The front surface of the circuit board 5 is further provided with at least one indicating light source 7 with a color different from the color of the lighting supplementary light source, the indicating light source 7 is in communication connection with the processor and is controlled to be lightened after the bar code reading decoding is successful, and the processor controls the lighting supplementary light source to be in a non-lightening state while the indicating light source 7 is lightened. The indication light source 7 can be used together with an audio alert device 62, and the audio alert device 62 can be a buzzer. When the bar code is successful, the pin of the processor sends a changed level signal to the indicating light source 7 and the sound reminding device 62, and the working states of the indicating light source 7 and the sound reminding device are changed within the duration time of the level signal, so that visual sound and light indication is provided for a client.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A barcode scanning device having multiple illumination modes, comprising:
the upper surface and the lower surface of the middle frame shell (1) are provided with openings;
the reading transparent screen (2) is detachably arranged on the upper surface of the middle frame shell (1), the outer surface of the reading transparent screen (2) facing the bar code is overlaid with an anti-fingerprint and anti-reflection chemical coating, and the inner surface of the reading transparent screen facing the lens seat (4) is plated with an anti-reflection chemical coating;
the light guide cover (3) is sleeved in the middle frame shell (1) and is horn-shaped, one end with a larger opening is in contact with the reading transparent screen (2), the other end with the smaller opening is used for accommodating the lens seat (4), the light guide cover (3) changes a traveling route of light emitted when an illumination light supplement light source arranged on a circuit board (5) below the light guide cover (3) is lightened, and incident light entering the light guide cover (3) is dispersed to generate optical diffusion and is scattered outwards through the reading transparent screen (2);
the light guide cover comprises a circuit board (5) and a light guide cover (3), wherein the circuit board (5) is arranged below the light guide cover (3), an image sensor slot (51) is arranged on the front surface of the circuit board (5), an imaging component (511) integrating an image sensor and a lens is connected above the image sensor slot (51), a lens seat (4) is sleeved outside the imaging component (511), the lens seat (4) is used as a butt joint device between the imaging component (511) and the light guide cover (3), a plurality of lamp beads (52) are arranged on the surface of the circuit board (5) around the image sensor slot (51) and used as lighting and light supplementing light sources, and the lighting and light supplementing light sources are controlled by a processor arranged on the circuit board (5) to be turned on or off; the circuit board (5) is also provided with a data interface (512) which is communicated with the outside and supplies power through a cable (53);
the circuit board is arranged on the upper surface of the lower shell (6), and the lower shell (6) is arranged at the lower end of the middle frame shell (1) through a connecting device.
2. A barcode scanning device with multiple illumination modes according to claim 1, characterized in that: the processor is configured to control the illumination light supplement light source to trigger the illumination light supplement light source to light at the end of exposure during a time period when the imaging component (511) executes a complete frame of image frame, and the duration of the illumination light supplement light source is less than 2 ms.
3. A barcode scanning device with multiple illumination modes according to claim 1 or 2, characterized in that: the light guide cover is characterized in that buckles (11) are arranged on four side faces of the inner side of the middle frame shell (1) close to the upper end, and one part of the light guide cover (3) extends outwards and horizontally at one end with a larger opening to be matched with the buckles (11), so that the light guide cover (3) is clamped in the middle frame shell (1).
4. A barcode scanning device with multiple illumination modes according to claim 2 or 3, characterized in that: imaging component (511) with still be provided with one can receive the extrusion to produce the buffering locating washer (41) of deformation between lens mount (5), be circular fretwork in the middle of it to the laminating holds camera lens (4).
5. A barcode scanning device with multiple illumination modes according to any one of claims 2 to 4, characterized in that: the lens mount (5) passes through two bilaterally symmetrical screws and the circuit board (5) is locked in the corresponding screw hole in the lower shell (6).
6. The barcode scanning device with multiple illumination modes according to claim 4 or 5, wherein at least one indication light source (7) with a color different from that of the illumination supplementary light source is further disposed on the front surface of the circuit board (5), the indication light source (7) is communicatively coupled to the processor and controlled to be turned on after the barcode reading and decoding succeeds, and the processor controls the illumination supplementary light source to be in a non-lighting state while the indication light source (7) is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545050.4A CN114239619B (en) | 2021-12-16 | 2021-12-16 | Bar code scanning equipment with multiple illumination modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545050.4A CN114239619B (en) | 2021-12-16 | 2021-12-16 | Bar code scanning equipment with multiple illumination modes |
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| CN114239619A true CN114239619A (en) | 2022-03-25 |
| CN114239619B CN114239619B (en) | 2023-07-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012088870A (en) * | 2010-10-18 | 2012-05-10 | Kuan San Technology Co Ltd | Bar code reader |
| CN106355119A (en) * | 2016-08-31 | 2017-01-25 | 福建新大陆自动识别技术有限公司 | Bar code recognition engine adopting displayed wick shape as aiming mark |
| JP3212310U (en) * | 2017-05-16 | 2017-09-07 | 茂森科技股▲ふん▼有限公司 | Scanner capable of scanning one-dimensional (1D) and two-dimensional (2D) barcodes |
| CN213069846U (en) * | 2020-10-19 | 2021-04-27 | 福州符号信息科技有限公司 | Bar code reading equipment based on multi-azimuth light source compensation |
| CN113033227A (en) * | 2021-03-24 | 2021-06-25 | 福建新大陆自动识别技术有限公司 | Bar code reading equipment with single light source |
-
2021
- 2021-12-16 CN CN202111545050.4A patent/CN114239619B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012088870A (en) * | 2010-10-18 | 2012-05-10 | Kuan San Technology Co Ltd | Bar code reader |
| CN106355119A (en) * | 2016-08-31 | 2017-01-25 | 福建新大陆自动识别技术有限公司 | Bar code recognition engine adopting displayed wick shape as aiming mark |
| JP3212310U (en) * | 2017-05-16 | 2017-09-07 | 茂森科技股▲ふん▼有限公司 | Scanner capable of scanning one-dimensional (1D) and two-dimensional (2D) barcodes |
| CN213069846U (en) * | 2020-10-19 | 2021-04-27 | 福州符号信息科技有限公司 | Bar code reading equipment based on multi-azimuth light source compensation |
| CN113033227A (en) * | 2021-03-24 | 2021-06-25 | 福建新大陆自动识别技术有限公司 | Bar code reading equipment with single light source |
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