CN114323579A - Transparent light guide member heterochromatic automatic detection method - Google Patents
Transparent light guide member heterochromatic automatic detection method Download PDFInfo
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- CN114323579A CN114323579A CN202111535221.5A CN202111535221A CN114323579A CN 114323579 A CN114323579 A CN 114323579A CN 202111535221 A CN202111535221 A CN 202111535221A CN 114323579 A CN114323579 A CN 114323579A
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Abstract
The utility model discloses a method for automatically detecting the heterochrosis of a transparent light guide piece, which comprises the following steps: (1) fixing the light guide piece through a product positioning jig, and transferring the light guide piece to the position right below the CCD camera; (2) starting a light source to irradiate the lower end part of the light guide piece; (3) photographing the upper end part of the light guide part through a CCD camera to obtain an image of light when the light is transmitted to the upper end part of the light guide part; (4) the method comprises the steps of obtaining the numerical values of image pixel points corresponding to the area where the upper end portion of each light guide piece is located from an image, judging whether the numerical values are in a preset good pixel point numerical range or a bad pixel point numerical range respectively, judging that the light guide piece is a good product if the numerical values are in the good pixel point numerical range, and judging that the light guide piece is a color-changing bad product if the numerical values are in the bad pixel point numerical range. The utility model has high automation degree, improves the production efficiency and the accuracy of judging the product quality, and reduces the production cost.
Description
Technical Field
The utility model relates to the technical field of light guide detection, in particular to an automatic detection method for the color difference of a transparent light guide.
Background
In order to transmit the light of the LED lamp to the outside of the housing of the electronic device, transparent light guides with various shapes are generally installed at the position of the LED lamp, for example, as shown in fig. 5, one of the light guides is shown. However, the produced light guide piece has a good product and a defective product, and in the conventional light guide piece detection process, the product is generally determined to be OK or NG by the naked eyes of workers, so that the problems of low efficiency, inaccurate determination result and the like exist in the determination mode, and the production cost is increased.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and provides a method for automatically detecting the color difference of a transparent light guide.
In order to achieve the above object, the present invention provides a method for automatically detecting the color difference of a transparent light guide, comprising the following steps:
(1) fixing the light guide piece through the product positioning jig, and transferring the product positioning jig and the light guide piece to the position right below the CCD camera;
the upper end part of the light guide piece extends out of the top of the product positioning jig, and the lower end part of the light guide piece extends out of the side face of the product positioning jig;
(2) starting a light source to irradiate the lower end part of the light guide piece;
(3) photographing the upper end part of the light guide part through a CCD camera to obtain an image of light when the light is transmitted to the upper end part of the light guide part;
(4) the method comprises the steps of obtaining the numerical value of an image pixel point corresponding to the area where the upper end part of each light guide piece is located from an image, judging whether the numerical value of the image pixel point corresponding to the area where the upper end part of each light guide piece is located is within a preset good product pixel point numerical range or a bad product pixel point numerical range, judging that the light guide piece is a good product if the numerical value is within the good product pixel point numerical range, and judging that the light guide piece is a color-changing bad product if the numerical value is within the bad product pixel point numerical range.
Preferably, the method further comprises the steps of:
(5) carry out the testing result through the product status indicator lamp that every leaded light spare corresponds and remind, when leaded light spare was the defective products, the product status indicator lamp that this leaded light spare corresponds was bright, otherwise, then is not bright.
Preferably, the method for obtaining the numerical range of the good pixel point is as follows:
and storing the images of the upper end parts of the plurality of good product light guide parts, and determining a good product pixel point value range according to the obtained image pixel point value corresponding to the region where the upper end part of the good product light guide part is located.
Preferably, the method for obtaining the defective pixel point value range includes:
and storing the images of the upper end parts of the defective light guide pieces, and determining a defective pixel value range according to the obtained image pixel value corresponding to the region where the upper end part of the defective light guide piece is located.
Preferably, the product positioning jig is placed on the jig placing base, the jig placing base is connected with the base translation driving device, the base translation driving device can drive the product positioning jig on the jig placing base to move to the position under the CCD camera, and the light source is installed on one side or two sides of the jig placing base through the light source installation frame.
Preferably, the product positioning jig comprises a jig main body and a pressing strip for pressing the light guide piece, wherein a product accommodating groove is formed in one side or two sides of the jig main body, and the pressing strip is fixed to one side or two sides of the jig main body.
Preferably, the jig main body and the pressing strip are made of opaque materials.
Preferably, the light source is provided as a bar light source.
Preferably, the base translation driving device is a linear module driven by a motor.
Preferably, the CCD camera is configured as a 1200W color high definition camera.
Preferably, the jig placing base, the base translation driving device, the light source and the CCD camera are all installed in the frame, and a material inlet and a material outlet for the jig placing base and the product positioning jig to enter and exit are formed in the front face of the frame.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has reasonable design, the CCD camera can photograph the upper end part of the light guide part irradiated by the light source to obtain the image when the light is transmitted to the upper end part of the light guide part, so that the system can obtain the numerical value of the image pixel point corresponding to the area of the upper end part of each light guide part from the image and respectively judge whether the numerical value of the image pixel point corresponding to the area of the upper end part of each light guide part is in the preset qualified pixel point numerical range or the defective pixel point numerical range, thereby automatically detecting whether the light guide part is a qualified product or a defective product, having high automation degree, improving the production efficiency and the accuracy of judging the product quality and reducing the production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an automatic detection apparatus for detecting a color difference of a transparent light guide according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of an automatic detection apparatus for detecting a color difference of a transparent light guide according to an embodiment of the present invention;
fig. 3 is an assembly view of a jig placement base and a base translation driving device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a product positioning fixture according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of one of the light guide products according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Referring to fig. 1 and 2, an embodiment of the present invention provides an automatic detection apparatus for a color difference of a transparent light guide, including a rack 9, a fixture placement base 1, a base translation driving device 2, a light source 3, a light source mounting frame 4, a CCD camera 5, a camera mounting frame 6, and a product positioning fixture 7 for placing the light guide, wherein a mounting plate 10 is disposed inside the rack 9, the base translation driving device 2, the light source mounting frame 4, and the camera mounting frame 6 are all mounted on the mounting plate 10, the base translation driving device 2 is connected with the fixture placement base 1, the product positioning fixture 7 is placed on the fixture placement base 1, the light source 3 is mounted on one side or both sides of the fixture placement base 1 through the light source mounting frame 4, and the CCD camera 5 is mounted above the fixture placement base 1 through the camera mounting frame 6. The following describes each component of the present embodiment in detail with reference to the drawings.
As shown in fig. 2 and 3, the base translation drive means 2 may preferably be provided as a linear module 22 driven by a motor 21. Of course, in other embodiments, other driving devices, such as a motor and a screw rod, may be adopted, and the driving can be implemented only by driving the product positioning fixture 7 to move stably, which is not limited in this embodiment.
As shown in fig. 2, the light source 3 is provided with two, and the light source 3 is installed in the both sides that the base 1 was placed to the tool through light source mounting bracket 4, and wherein, this light source 3 can be preferred to set up to bar light source (like white light), and it is favorable to shining a plurality of leaded light spares, guarantees that the illumination of every leaded light spare is even.
In the present embodiment, the CCD camera 5 may be preferably provided as a 1200W color high definition camera, which can improve the detection accuracy.
As shown in fig. 3, a jig positioning groove 11 is formed at the top of the jig placing base 1, which is beneficial to positioning the product positioning jig and prevents the product positioning jig from shifting or falling off during the moving process.
As shown in fig. 4, the product positioning jig 7 may include a jig main body 71 and a pressing bar 72, the jig main body 71 may be configured to be a "convex" structure, product accommodating grooves 73 (such as L-shaped) for accommodating the light guide member are disposed on two sides of the jig main body 71, the pressing bar 72 may be fixed on two sides of the jig main body 71 by fixing members such as pins or screws, and the pressing bar 72 may press the light guide member to prevent the light guide member from being displaced.
The upper end 102 of the light guide 100 can extend out of the top of the product positioning fixture 7, and the lower end 101 of the light guide extends out of the side of the product positioning fixture 7.
Preferably, the jig main body 71 and the pressing bar 72 may be made of opaque material, such as black material, which is beneficial to light transmission with the light guide member, and in addition, the color difference between black and white is also beneficial to the system to obtain the value of the image pixel point corresponding to the region where the upper end portion of each light guide member is located.
As shown in fig. 2 and fig. 3, as a preferred embodiment, two rows of product status indicator lights 8 corresponding to the positions of the light guide members on the product positioning jig 7 are disposed on the jig placing base 1. When a certain product status indicator light 8 is lighted, the light guide part corresponding to the product status indicator light 8 is indicated to be a defective product, the light is not lighted, the light guide part corresponding to the product status indicator light 8 is indicated to be a good product, the product status indicator light 8 can remind other light, and the position of the defective product can be identified by an operator quickly.
As shown in fig. 1, the front surface of the frame 9 is provided with a material inlet and outlet 91 for the jig placing base 1 and the product positioning jig 7 to enter and exit, and the inside of the frame 9 can improve a better photographing environment for the detection of the light guide member.
In addition, according to actual needs, in other embodiments, the front of the frame 9 may further be provided with a display 11 for displaying image information or other information, a touch screen 12 for control, and a button 13 (such as a start button, an emergency stop button, a switch button, etc.), the top of the frame 9 is provided with a three-color alarm lamp 14, and the bottom of the frame 9 is provided with a movable caster 15 for facilitating movement of the device.
The method for automatically detecting the different colors of the transparent light guide piece comprises the following steps:
(1) fixing the light guide piece through the product positioning jig, and transferring the product positioning jig and the light guide piece to the position right below the CCD camera;
(2) starting a light source to irradiate the lower end part of the light guide piece;
(3) photographing the upper end part of the light guide part through a CCD camera to obtain an image of light when the light is transmitted to the upper end part of the light guide part;
(4) obtaining the numerical value of an image pixel point corresponding to the area where the upper end part of each light guide piece is located from the image, respectively judging whether the numerical value of the image pixel point corresponding to the area where the upper end part of each light guide piece is located is within a preset good pixel point numerical range or a defective pixel point numerical range, if so, judging that the light guide piece is a good product, and if so, judging that the light guide piece is a color-changing defective product;
(5) carry out the testing result through the product status indicator lamp that every leaded light spare corresponds and remind, when leaded light spare was the defective products, the product status indicator lamp that this leaded light spare corresponds was bright, otherwise, then is not bright.
The method for acquiring the numerical range of the non-defective pixel points comprises the following steps:
and storing the images of the upper end parts of the plurality of good product light guide parts, and determining a good product pixel point value range according to the obtained image pixel point value corresponding to the region where the upper end part of the good product light guide part is located.
The method for acquiring the numerical range of the defective pixel point comprises the following steps:
and storing the images of the upper end parts of the defective light guide pieces, and determining a defective pixel value range according to the obtained image pixel value corresponding to the region where the upper end part of the defective light guide piece is located.
It should be noted that, the product positioning fixture 7 of the present embodiment may also be provided with only one row of product accommodating grooves 73 without limiting the number of the groove positions, and accordingly, the light source 3 and the product status indicator light 8 may also be adaptively adjusted.
In conclusion, the automatic detection device is reasonable in design and high in automation degree, improves the production efficiency and the accuracy of judging the product quality, and reduces the production cost.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A method for automatically detecting the different colors of a transparent light guide part is characterized by comprising the following steps:
(1) fixing the light guide piece through the product positioning jig, and transferring the product positioning jig and the light guide piece to the position right below the CCD camera; the upper end part of the light guide piece extends out of the top of the product positioning jig, and the lower end part of the light guide piece extends out of the side face of the product positioning jig;
(2) starting a light source to irradiate the lower end part of the light guide piece;
(3) photographing the upper end part of the light guide part through a CCD camera to obtain an image of light when the light is transmitted to the upper end part of the light guide part;
(4) the method comprises the steps of obtaining the numerical value of an image pixel point corresponding to the area where the upper end part of each light guide piece is located from an image, judging whether the numerical value of the image pixel point corresponding to the area where the upper end part of each light guide piece is located is within a preset good product pixel point numerical range or a bad product pixel point numerical range, judging that the light guide piece is a good product if the numerical value is within the good product pixel point numerical range, and judging that the light guide piece is a color-changing bad product if the numerical value is within the bad product pixel point numerical range.
2. The method of claim 1, further comprising the steps of:
(5) carry out the testing result through the product status indicator lamp that every leaded light spare corresponds and remind, when leaded light spare was the defective products, the product status indicator lamp that this leaded light spare corresponds was bright, otherwise, then is not bright.
3. The method according to claim 1, wherein the method for obtaining the numerical range of the good pixel points comprises:
storing images of the upper end parts of a plurality of good product light guide pieces, and determining a good product pixel point value range according to the obtained image pixel point value corresponding to the region where the upper end part of the good product light guide piece is located;
the method for acquiring the numerical range of the defective pixel point comprises the following steps:
and storing the images of the upper end parts of the defective light guide pieces, and determining a defective pixel value range according to the obtained image pixel value corresponding to the region where the upper end part of the defective light guide piece is located.
4. The method according to claim 1, wherein the product positioning fixture is placed on a fixture placement base, the fixture placement base is connected to a base translation driving device, the base translation driving device can drive the product positioning fixture on the fixture placement base to move under the CCD camera, and the light source is mounted on one side or both sides of the fixture placement base through a light source mounting frame.
5. The method according to claim 1, wherein the product positioning fixture comprises a fixture body and a pressing strip for pressing the light guide member, wherein one or both sides of the fixture body are provided with product accommodating grooves, and the pressing strip is fixed on one or both sides of the fixture body.
6. The method of claim 5, wherein the fixture body and the molding are made of opaque material.
7. The method of claim 1, wherein the light source is a strip light source.
8. The method as claimed in claim 4, wherein the base translation driving device is a linear module driven by a motor.
9. The method as claimed in claim 1, wherein the CCD camera is a 1200W color high definition camera.
10. The method according to claim 4, wherein the jig placing base, the base translation driving device, the light source and the CCD camera are all installed inside a frame, and a material inlet and a material outlet for the jig placing base and the product positioning jig to enter and exit are formed in the front surface of the frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111535221.5A CN114323579A (en) | 2021-12-15 | 2021-12-15 | Transparent light guide member heterochromatic automatic detection method |
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| CN202111535221.5A CN114323579A (en) | 2021-12-15 | 2021-12-15 | Transparent light guide member heterochromatic automatic detection method |
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| CN212748758U (en) * | 2020-09-03 | 2021-03-19 | 青岛瑞一安源实业有限公司 | Light guide column light transmission detection mechanism |
| CN214289488U (en) * | 2020-09-03 | 2021-09-28 | 上海汇博精工电子科技有限公司 | Part luminescence detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003075292A (en) * | 2001-06-14 | 2003-03-12 | Tomey Corp | Equipment and method for inspecting transparent body |
| CN101451961A (en) * | 2007-12-06 | 2009-06-10 | 本田技研工业株式会社 | Belt inspecting apparatus |
| KR20130143226A (en) * | 2012-06-21 | 2013-12-31 | 주식회사 넥스트아이 | Apparatus for inspecting light guide plate |
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