CN104809423A - Bar code reading device - Google Patents
Bar code reading device Download PDFInfo
- Publication number
- CN104809423A CN104809423A CN201510206220.4A CN201510206220A CN104809423A CN 104809423 A CN104809423 A CN 104809423A CN 201510206220 A CN201510206220 A CN 201510206220A CN 104809423 A CN104809423 A CN 104809423A
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- China
- Prior art keywords
- bar code
- code reading
- prompt
- imaging system
- lens unit
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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
Abstract
The invention relates to a bar code reading device. The bar code reading device comprises an imaging system for obtaining the image of a bar code to be read and an optical prompt module for forming a prompt optical mark on the bar code to be read. The optical prompt module comprises a prompt optical source and a lens unit which are spaced. An optical signal of the prompt optical source forms the prompt optical mark after passing the lens unit. According to the bar code reading device, the optical prompt module comprises the prompt optical light source and the lens unit, the prompt optical source forms the prompt optical mark on the bar code to be read through the lens unit, and accordingly the bar code reading device can obtain high-quality images of bar codes to be read to achieve quick decoding. Meanwhile, the optical prompt module is simple in structure, low in cost and high in production efficiency.
Description
Technical field
The present invention relates to photoelectric field, more particularly, relate to a kind of bar code reading facility.
Background technology
Bar code is first proposed in 1949 by the N.T.Woodland of the U.S..Improving constantly with universal in recent years along with computer technology, the application of bar code obtains very large development.Traditional reading code mode is the bar code be read by the alignment lens of bar code reading facility, according to the illumination of light source in bar code reading facility, utilizes naked eyes to judge the recognition distance determining bar code.Not of uniform size due to bar code, and the distance of camera lens of bar code and bar code reading facility is also different, therefore often can not effectively ensure to be transferred to best recognition Distance geometry position in recognition.
For solving the problem, correlation technique adopts cursor prompt method usually, typically use one group or two groups of cursor prompt assemblies, each cursor prompt assembly is made up of a light source, one or more lens, one or more imaging part (as lenticular lenses) etc.Refer to Fig. 4 and Fig. 5, be respectively two example structure figure of the light prompting assembly of bar code reading facility in correlation technique.As shown in Figure 4 and Figure 5, the light that light source 1 sends is respectively by convex lens 2 and lenticular lenses 3, or after lenticular lenses 3 and convex lens 2, define prompt 4, and the equal proportion that the shape of prompt 4 is hole shapes in lenticular lenses 2 is amplified, and shows the shape needed in " ten " font or round dot etc.When this type of bar code reading facility is when distinguishing bar code, the prompt 4 of the irradiation that can send according to bar code reading facility on bar code, the relative position changing bar code reading facility and be read between bar code, thus obtain the image of better quality, be conducive to reading bar code efficiently.
The light prompting modular construction of such bar code reading facility is complicated, cost is higher; And because lenticular lenses 3 has covered the part light that light source 1 sends, cause prompt 4 brightness low, when supplementary lighting sources brightness is higher, such prompt poor definition.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of bar code reading facility of improvement.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of bar code reading facility, comprises for obtaining the imaging system waiting to distinguish bar code image and for distinguishing described waiting light prompting assembly bar code being formed prompt;
Described light prompting assembly comprises spaced indicating light and lens unit, and the light signal of described indicating light forms described prompt after described lens unit.
Preferably, the axial line of the axial line of described light prompting assembly and described imaging system at grade.
Preferably, the described light prompting axial line of assembly and the axis parallel of described imaging system, and distance is between the two less than or equal to 10mm; Or,
The described light prompting axial line of assembly and the axial line of described imaging system intersect on the capture direction of described imaging system, and the position of the described prompt (33) formed is corresponding with described position for the treatment of that recognition bar code (50) is placed.
Preferably, described light prompting assembly comprises the lens unit of removable multiple different focal; Or,
Described light prompting assembly comprises the adjustable lens unit of focal position.
Preferably, described lens unit comprises convex lens.
Preferably, the distance between described indicating light and described lens unit is adjustable.
Preferably, described indicating light comprises luminophor, the shape of the described prompt that described luminophor presents and luminophor shape similar or identical.
Preferably, described indicating light comprises the LED with described luminophor.
Preferably, described imaging system comprises an adjustable imaging system of imaging focal length; Or,
Described imaging system comprises at least two different imaging systems of imaging focal length.
Preferably, described bar code reading facility also comprises at least one for illuminating the supplementary lighting sources in the capture interval of described imaging system, and the brightness of described supplementary lighting sources is adjustable.
Implement bar code reading facility of the present invention, there is following beneficial effect: the light prompting assembly of bar code reading facility of the present invention comprises indicating light and lens unit, indicating light scioptics unit is being treated recognition bar code forms prompt, make bar code reading facility can obtain the image waiting to distinguish bar code of better quality, thus realize quick decoding, simultaneously
, shouldlight prompting modular construction is simple, cost is lower, production efficiency is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is bar code reading facility in embodiment of the present invention fundamental diagram when distinguishing bar code to be identified;
Fig. 2 is the schematic perspective view of the light prompting assembly in Fig. 1;
Fig. 3 is the optical imaging concept schematic diagram of the light prompting assembly in Fig. 1;
Fig. 4 is the structural representation of the light prompting assembly of bar code reading facility first embodiment in background technology;
Fig. 5 is the structural representation of the light prompting assembly of bar code reading facility second embodiment in background technology.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1, bar code reading facility in a preferred embodiment of the invention comprises housing 10, the imaging system 20 be arranged in housing 10, light point out assembly 30 and supplementary lighting sources 40, imaging system 20 treats the capture of recognition bar code 50, and the light signal of light prompting assembly 30, supplementary lighting sources 40 is irradiated to be treated on recognition bar code 50.
Imaging system 20 can be one, and the image information waiting to distinguish bar code 50 by regulating imaging focal length to obtain different distance, certainly, imaging system 20 also can be comprise the different two or more imaging systems 20 of imaging focal length, to obtain the image information waiting to distinguish bar code 50 of correspondence position respectively, and distinguish bar code 50 image information to realize distinguishing the function of bar code by analyzing waiting of obtaining.
Light prompting assembly 30 comprises spaced indicating light 31 and lens unit 32, and lens unit 32 is arranged on indicating light 31 direction of illumination, and the light signal of indicating light 31 forms prompt 33 after lens unit 32.Indicating light 31 comprises the LED with luminophor 311, the body of light shape that luminophor 311 luminescence produces can be specific shape, the shape of the prompt 33 presented after lens unit 32 and the proportional amplification of shape of luminophor 311, can be presented on and treat recognition bar code 50 allows people see, and judge to treat that recognition bar code 50 is in the discernible distance range of imaging system 20 according to this prompt 33.In other embodiments, the shape of prompt 33 also can be identical with the shape of luminophor 311 or proportionally to reduce.
Preferably, prompt 33 is imaged in the plane of bar code 50 placement, so that user carrys out alignment bar shape code 50 by observing prompt 33.
Lens unit 32 generally includes convex lens, and luminophor 311 imaging is formed prompt 33.In order to identify different far and near bar code, light prompting assembly 30 comprises the lens unit 32 of removable multiple different focal.In general, the longer lens unit 32 of focal length, at remotely imaging clearly, is applicable to place the identification waiting more at a distance to distinguish bar code 50, and the short lens unit 32 of focal length, at imaging clearly more nearby, is applicable to the identification that closer distance waits to distinguish bar code 50.In other embodiments, also can realize the adjustment to prompt 33 size and image-forming range by the distance between adjustment indicating light 31 and lens unit 32, wait that distinguishing bar code 50 position matches to realize prompt 33 with actual.
Certainly, lens unit 32 also can be the combination of one or more lens, by the focal length regulating the distance between each lens to regulate lens unit 32, realize the position adjustments of the prompt 33 that luminophor 311 is formed, thus meet the identification waiting to distinguish bar code 50 being placed on diverse location.
In order to ensure that the position that prompt 33 indicates and imaging system 20 capture wait that the center distinguishing bar code 50 is consistent substantially, usually, the axial line of the light prompting axial line of assembly 30 and imaging system 20 at grade.Further, the light prompting axial line of assembly 30 and the axial line of imaging system 20 are parallel to each other, and make light point out the distance between the axial line of assembly 30 and the axial line of imaging system 20 little as far as possible, preferably, are generally not more than 10mm.In some other embodiment, light the prompting axial line of assembly 30 and the axial line of imaging system 20 also can intersect on the capture direction of imaging system 20, and with the position of the prompt 33 formed with to wait to distinguish bar code 50 placement location corresponding.In the above conditions, what the position that prompt 33 indicates and imaging system 20 scanned waits that the position distinguishing bar code 50 is consistent substantially, when prompt 33 impinges upon in time distinguishing the center of bar code 50, treat that recognition bar code 50 is also located essentially on the axial line of imaging system 20, now wait to distinguish the center that bar code 50 is in imaging system 20 scanning, picture quality is high, is beneficial to decoding.
Certainly, ensureing prompt 33 and placing also can spatially intersect with the axial line of imaging system 20 to the light prompting axial line of assembly 30 during correspondence until the position of recognition bar code 50.
Supplementary lighting sources 40 is interval for the capture illuminating imaging system 20, and treat that recognition bar code 50 shows more clear to allow when darker, obtain high-quality image, its quantity can be one or more.Bright or excessively dark in order to prevent the brightness illuminated from crossing, the brightness of supplementary lighting sources 40 is adjustable, to meet suitable capture brightness.When multiple supplementary lighting sources 40, control brightness by the quantity of opening, also can control brightness by control flow check through the size of current of supplementary lighting sources 40.
Understandably, above-mentioned each technical characteristic can combination in any use and unrestricted.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a bar code reading facility, is characterized in that, comprises for obtaining the imaging system (20) waiting to distinguish bar code (50) image and for distinguishing described waiting light prompting assembly (30) bar code (50) being formed prompt (33);
Described light prompting assembly (30) comprises spaced indicating light (31) and lens unit (32), and the light signal of described indicating light (31) forms described prompt (33) after described lens unit (32).
2. bar code reading facility according to claim 1, is characterized in that, the axial line of described light prompting assembly (30) and the axial line of described imaging system (20) are at grade.
3. bar code reading facility according to claim 2, is characterized in that, the described axial line of light prompting assembly (30) and the axis parallel of described imaging system (20), and distance is between the two less than or equal to 10mm; Or,
The described axial line of light prompting assembly (30) and the axial line of described imaging system (20) intersect on the capture direction of described imaging system (20), and the position of the described prompt (33) formed is corresponding with described position for the treatment of that recognition bar code (50) is placed.
4. bar code reading facility according to claim 1, is characterized in that, described light prompting assembly (30) comprises the lens unit (32) of removable multiple different focal; Or,
Described light prompting assembly (30) comprises the adjustable lens unit of focal position (32).
5. bar code reading facility according to claim 4, is characterized in that, described lens unit (32) comprises convex lens.
6. the bar code reading facility according to claim 4 or 5, is characterized in that, the distance between described indicating light (31) and described lens unit (32) is adjustable.
7. bar code reading facility according to claim 1, it is characterized in that, described indicating light (31) comprises luminophor (311), and shape and luminophor (311) shape of the described prompt (33) that described luminophor (311) presents are similar or identical.
8. bar code reading facility according to claim 7, is characterized in that, described indicating light (31) comprises the LED with described luminophor (311).
9. bar code reading facility according to claim 1, is characterized in that, described imaging system (20) comprises an adjustable imaging system of imaging focal length; Or,
Described imaging system (20) comprises at least two different imaging systems of imaging focal length.
10. the bar code reading facility according to claim 1 or 9, it is characterized in that, described bar code reading facility also comprises at least one for illuminating the supplementary lighting sources (40) in the capture interval of described imaging system (20), and the brightness of described supplementary lighting sources (40) is adjustable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206220.4A CN104809423B (en) | 2015-04-27 | 2015-04-27 | Bar code reading facility |
| PCT/CN2015/093130 WO2016173224A1 (en) | 2015-04-27 | 2015-10-28 | Bar code reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206220.4A CN104809423B (en) | 2015-04-27 | 2015-04-27 | Bar code reading facility |
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| Publication Number | Publication Date |
|---|---|
| CN104809423A true CN104809423A (en) | 2015-07-29 |
| CN104809423B CN104809423B (en) | 2019-08-09 |
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| CN201510206220.4A Active CN104809423B (en) | 2015-04-27 | 2015-04-27 | Bar code reading facility |
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| CN (1) | CN104809423B (en) |
| WO (1) | WO2016173224A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105224902A (en) * | 2015-09-23 | 2016-01-06 | 深圳市民德电子科技股份有限公司 | The bar code reading facility waiting to distinguish bar code is located with two groups of cursors |
| WO2016173224A1 (en) * | 2015-04-27 | 2016-11-03 | 深圳市民德电子科技股份有限公司 | Bar code reading device |
| CN106778430A (en) * | 2017-02-15 | 2017-05-31 | 上海鹰捷智能科技有限公司 | A kind of two-dimentional identifying device |
| CN107122694A (en) * | 2017-06-16 | 2017-09-01 | 北京鼎九信息工程研究院有限公司 | The light filling sighting means and image scanning apparatus of a kind of image scanning apparatus |
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| CN204576532U (en) * | 2015-04-27 | 2015-08-19 | 深圳市民德电子科技股份有限公司 | Bar code reading facility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104809423B (en) * | 2015-04-27 | 2019-08-09 | 深圳市民德电子科技股份有限公司 | Bar code reading facility |
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2015
- 2015-04-27 CN CN201510206220.4A patent/CN104809423B/en active Active
- 2015-10-28 WO PCT/CN2015/093130 patent/WO2016173224A1/en active Application Filing
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016173224A1 (en) * | 2015-04-27 | 2016-11-03 | 深圳市民德电子科技股份有限公司 | Bar code reading device |
| CN105224902A (en) * | 2015-09-23 | 2016-01-06 | 深圳市民德电子科技股份有限公司 | The bar code reading facility waiting to distinguish bar code is located with two groups of cursors |
| WO2017049709A1 (en) * | 2015-09-23 | 2017-03-30 | 深圳市民德电子科技股份有限公司 | Bar code reading apparatus using two markers to locate bar code to be read |
| CN105224902B (en) * | 2015-09-23 | 2019-01-04 | 深圳市民德电子科技股份有限公司 | The bar code reading facility of bar code to be distinguished is positioned with two groups of cursors |
| CN106778430A (en) * | 2017-02-15 | 2017-05-31 | 上海鹰捷智能科技有限公司 | A kind of two-dimentional identifying device |
| CN107122694A (en) * | 2017-06-16 | 2017-09-01 | 北京鼎九信息工程研究院有限公司 | The light filling sighting means and image scanning apparatus of a kind of image scanning apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104809423B (en) | 2019-08-09 |
| WO2016173224A1 (en) | 2016-11-03 |
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