CN111709261A - PCB bar code reading device and adjusting method thereof - Google Patents
PCB bar code reading device and adjusting method thereof Download PDFInfo
- Publication number
- CN111709261A CN111709261A CN202010595995.6A CN202010595995A CN111709261A CN 111709261 A CN111709261 A CN 111709261A CN 202010595995 A CN202010595995 A CN 202010595995A CN 111709261 A CN111709261 A CN 111709261A
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- China
- Prior art keywords
- pcb
- light source
- reading device
- light
- ccd lens
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000000007 visual effect Effects 0.000 abstract description 7
- 238000005498 polishing Methods 0.000 abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000010949 copper Substances 0.000 abstract description 3
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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
-
- 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
- G06K7/10861—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 sensing of data fields affixed to objects or articles, e.g. coded labels
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The embodiment of the invention discloses a PCB bar code reading device and an adjusting method thereof, relating to the technical field of PCB bar code acquisition. The PCB bar code reading device comprises a light source, a plane mirror, a PCB, a CCD lens and a polarizer; the light emitted by the light source enters the CCD lens after being reflected by the plane mirror and the PCB in sequence; the polarizer is arranged on the front side of the CCD lens. The embodiment of the invention changes the directional direct lighting and polishing in the prior art into small-deflection-angle reflection and polishing, thereby reducing the reflection intensity; meanwhile, a polarizer is added between the PCB and the CCD lens to filter diffuse reflection light, so that the interference of the diffuse reflection light of the PCB on visual detection during code reading is eliminated, the chromatic aberration between the bar code and the copper surface can be improved, the image capturing quality of the visual detection is optimized, and the yield of code reading is improved.
Description
Technical Field
The invention relates to the technical field of PCB bar code acquisition, in particular to a PCB bar code reading device and an adjusting method thereof.
Background
The existing CCD code reader adopts a directional direct light-striking technology, and the code reading yield is about 95 percent; the PCB board that leads to of part PCB board because of palm alligatoring liquid medicine, polish-brush machine polish-brush etc. is too coarse, and the dazzling facula can appear after the light source penetrates directly when CCD code reading machine reads the sign indicating number, and the clear sign indicating number on the PCB board can't be gathered to the vision software, leads to the code reading yield to unable the promotion, brings very big puzzlement for the quality management and control.
Disclosure of Invention
The embodiment of the invention provides a PCB bar code reading device and an adjusting method thereof, aiming at solving the problem of low reading rate of PCB bar codes in the prior art.
In order to solve the above problem, in a first aspect, an embodiment of the present invention provides a PCB barcode reading apparatus, where the PCB barcode reading apparatus includes a light source, a plane mirror, a PCB board, a CCD lens, and a polarizer; light emitted by the light source sequentially passes through the plane mirror and the PCB board for reflection and then enters the CCD lens through the polarizer.
The further technical scheme is that after light emitted by the light source is reflected by a plane mirror, the incident angle of the light irradiating the PCB is 4-6 degrees.
The further technical scheme is that the reflection angle of light emitted by the light source reflected by the PCB is 4-6 degrees.
The further technical scheme is that the PCB bar code reading device further comprises a computer, and the computer is connected with the CCD lens.
The further technical scheme is that the light source is a strip light source.
The further technical scheme is that the light source is an LED lamp.
In a second aspect, an embodiment of the present invention provides a method for adjusting a PCB barcode reading apparatus, where the method for adjusting a PCB barcode reading apparatus is applied to the PCB barcode reading apparatus according to the first aspect, and the method for adjusting a PCB barcode reading apparatus includes:
controlling a light source to horizontally irradiate light to the plane mirror;
adjusting the angle of the plane mirror to enable the light reflected by the plane mirror to irradiate the area to be measured of the PCB at a preset incident angle;
adjusting the position of a CCD lens to enable light reflected by the PCB to irradiate the CCD lens at a preset reflection angle;
and a polarizer is arranged on the front side of the CCD lens.
The further technical proposal is that the incident angle is 4-6 degrees.
The further technical scheme is that the reflection angle is 4-6 degrees.
The further technical scheme is that the light source is a strip light source.
Compared with the prior art, the embodiment of the invention can achieve the following technical effects:
by applying the technical scheme of the invention, the directional direct lighting and polishing in the prior art are changed into small-deflection-angle reflection and polishing, so that the reflection intensity is reduced; meanwhile, a polarizer is added between the PCB and the CCD lens to filter diffuse reflection light, so that the interference of the diffuse reflection light of the PCB on visual detection during code reading is eliminated, the chromatic aberration between the bar code and the copper surface can be improved, the image capturing quality of the visual detection is optimized, and the yield of code reading is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a PCB barcode reading apparatus according to an embodiment of the present invention.
Reference numerals
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like elements in the drawings. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Referring to fig. 1, an embodiment of the present invention provides a PCB barcode reading apparatus. As can be seen from the figure, the PCB barcode reading apparatus includes a light source 1, a plane mirror 2, a PCB board 3, a CCD lens 4, and a polarizer 5.
The light emitted by the light source 1 enters the CCD lens 4 after being reflected by the plane mirror 2 and the PCB 3 in sequence. The polarizer 5 is arranged in front of the CCD lens 4.
It will be appreciated that the light is reflected by the PCB 3 and enters the CCD lens 4 via the polarizer 5.
By applying the technical scheme of the invention, the directional direct lighting and polishing in the prior art are changed into small-deflection-angle reflection and polishing, so that the reflection intensity is reduced; meanwhile, the polarizer 5 is additionally arranged between the PCB 3 and the CCD lens 4 to filter diffuse reflection light, so that the interference of the diffuse reflection light of the PCB 3 on visual detection during code reading is eliminated, the chromatic aberration between the bar code and the copper surface can be improved, the image capturing quality of the visual detection is optimized, and the yield of code reading is improved.
Further, in some embodiments, for example, in the present embodiment, the light emitted from the light source 1 is reflected by the plane mirror 2, and then the incident angle θ 1 of the light irradiated to the PCB 3 is 4 ° to 6 °. For example, the incident angle θ 1 may take 4 °, 5 °, or 6 °.
Further, the reflection angle theta 2 of the light emitted by the light source 1 and reflected by the PCB 3 is 4-6 degrees. For example, the reflection angle θ 2 may take 4 °, 5 °, or 6 °.
Further, the PCB bar code reading device also comprises a computer, and the computer is connected with the CCD lens 4.
Further, the light source 1 is a bar light source.
Further, the light source 1 is an LED lamp.
It should be noted that the bar-shaped light source is a rectangular surface light source, and functions to provide parallel light.
The plane mirror has neither convergence nor divergence effects on light rays, can well reflect parallel light, and provides secondary diffuse reflection for visual detection.
A polarizer, also called a polarizer, is a color filter that mainly functions to filter reflected light, increase the imaging contrast, and thus improve the sharpness of the picture.
The CCD lens is a photosensitive element and can convert optical signals into electric signals, and then the electric signals are transmitted to a computer for processing and imaging.
The incidence angle and the reflection angle are controlled to be 4-6 degrees because the imaging is clearer when the angle is smaller, but the imaging cannot be too small, and the recognition is strongly influenced by too small reflection.
Accordingly, the present invention provides an adjusting method of a PCB barcode reading apparatus, which is applied to the PCB barcode reading apparatus according to the above embodiments, and the adjusting method of the PCB barcode reading apparatus includes the following steps S1-S4.
And S1, controlling the light source to horizontally irradiate light to the plane mirror.
And S2, adjusting the angle of the plane mirror so that the light reflected by the plane mirror irradiates the area to be measured of the PCB at a preset incidence angle.
And S3, adjusting the position of the CCD lens so that the light reflected by the PCB can be irradiated into the CCD lens at a preset reflection angle.
And S4, arranging a polarizer on the front side of the CCD lens.
Further, in some embodiments, such as the present embodiment, the angle of incidence is between 4 ° and 6 °.
For example, the incident angle may take 4 °, 5 °, or 6 °.
Further, the reflection angle is 4-6 °.
For example, the reflection angle may take 4 °, 5 °, or 6 °.
Further, the light source is a bar light source.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the above-described embodiments, it will be understood that the invention is not limited thereto but may be embodied with various modifications and changes.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A PCB bar code reading device is characterized by comprising a light source, a plane mirror, a PCB, a CCD lens and a polarizer; light emitted by the light source sequentially passes through the plane mirror and the PCB board for reflection and then enters the CCD lens through the polarizer.
2. The PCB barcode reading apparatus of claim 1, wherein the light emitted from the light source is reflected by the plane mirror to irradiate the PCB at an incident angle of 4 ° -6 °.
3. The PCB barcode reading device of claim 1, wherein a reflection angle of light emitted from the light source reflected by the PCB board is 4 ° -6 °.
4. The PCB barcode reading device of claim 1, further comprising a computer, wherein the computer is connected to the CCD lens.
5. The PCB barcode reading device of claim 1, wherein the light source is a bar light source.
6. The PCB barcode reading device of claim 1, wherein the light source is an LED lamp.
7. A PCB barcode reading apparatus adjusting method applied to the PCB barcode reading apparatus of any one of claims 1 to 6, the PCB barcode reading apparatus adjusting method comprising:
controlling a light source to horizontally irradiate light to the plane mirror;
adjusting the angle of the plane mirror to enable the light reflected by the plane mirror to irradiate the area to be measured of the PCB at a preset incident angle;
adjusting the position of a CCD lens to enable light reflected by the PCB to irradiate the CCD lens at a preset reflection angle;
and a polarizer is arranged in front of the CCD lens.
8. The PCB barcode reading device adjusting method of claim 7, wherein the incident angle is 4 ° -6 °.
9. The PCB barcode reading device adjusting method of claim 7, wherein the reflection angle is 4 ° -6 °.
10. The method of adjusting a PCB barcode reading device of claim 7, wherein the light source is a bar light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595995.6A CN111709261A (en) | 2020-06-24 | 2020-06-24 | PCB bar code reading device and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595995.6A CN111709261A (en) | 2020-06-24 | 2020-06-24 | PCB bar code reading device and adjusting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111709261A true CN111709261A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010595995.6A Pending CN111709261A (en) | 2020-06-24 | 2020-06-24 | PCB bar code reading device and adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111709261A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102573308A (en) * | 2012-01-12 | 2012-07-11 | 合肥芯硕半导体有限公司 | Correction method of graphic splicing errors of printed circuit board (PCB) |
| CN103743758A (en) * | 2014-01-15 | 2014-04-23 | 唐山英莱科技有限公司 | Visual inspection system for high-reflective metal surface based on cross-polarization |
| CN104949983A (en) * | 2014-03-28 | 2015-09-30 | 宝山钢铁股份有限公司 | Line scanning camera imaging method for object with variable thickness |
| CN108416834A (en) * | 2018-01-08 | 2018-08-17 | 长春理工大学 | Transparent objects surface three dimension reconstructing method, device and system |
-
2020
- 2020-06-24 CN CN202010595995.6A patent/CN111709261A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102573308A (en) * | 2012-01-12 | 2012-07-11 | 合肥芯硕半导体有限公司 | Correction method of graphic splicing errors of printed circuit board (PCB) |
| CN103743758A (en) * | 2014-01-15 | 2014-04-23 | 唐山英莱科技有限公司 | Visual inspection system for high-reflective metal surface based on cross-polarization |
| CN104949983A (en) * | 2014-03-28 | 2015-09-30 | 宝山钢铁股份有限公司 | Line scanning camera imaging method for object with variable thickness |
| CN108416834A (en) * | 2018-01-08 | 2018-08-17 | 长春理工大学 | Transparent objects surface three dimension reconstructing method, device and system |
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Application publication date: 20200925 |
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| RJ01 | Rejection of invention patent application after publication |