CN214277950U - Fuel cell graphite plate surface forming smoothness detection device - Google Patents
Fuel cell graphite plate surface forming smoothness detection device Download PDFInfo
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- CN214277950U CN214277950U CN202022676733.0U CN202022676733U CN214277950U CN 214277950 U CN214277950 U CN 214277950U CN 202022676733 U CN202022676733 U CN 202022676733U CN 214277950 U CN214277950 U CN 214277950U
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Abstract
The utility model relates to a bright and clean degree detection device of fuel cell graphite plate surface shaping, the device include darkroom, fixed lamp source (5) and camera (6), the darkroom be used for covering establish and wait to detect graphite plate (3), fixed lamp source (5) fix at the darkroom top and shine graphite plate (3) surface region, camera (6) fix at the darkroom top, camera (6) camera lens are located the darkroom and aim at graphite plate (3), the device still including being used for carrying out the treater of bright and clean degree discernment according to graphite plate (3) surface image that camera (6) were shot, the treater connect camera (6). Compared with the prior art, the utility model provides a device that graphite cake smooth and clean degree detected through computer vision reduces artifical detection cost.
Description
Technical Field
The utility model relates to a fuel cell graphite cake detects the technique, especially relates to a bright and clean degree detection device of fuel cell graphite cake surface shaping.
Background
The bipolar plate is a core part of a fuel cell stack, and the smoothness of ridges and grooves in a flow field of the bipolar plate is very important no matter the bipolar plate is a metal bipolar plate or a graphite bipolar plate, and flaws of the bipolar plate can possibly affect corrosion resistance, high and low temperature, hydrophilic degree, drainage effect and the like.
At present, instrument equipment for detecting the forming smoothness of the surface of the graphite plate of the fuel cell is not provided, more artificial visual detection methods are used for detecting the forming smoothness of the surface of the graphite plate of the fuel cell, and a large amount of manpower is consumed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fuel cell graphite plate surface forming smoothness degree detection device for overcoming the defects of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
the device comprises a darkroom, a fixed light source and a camera, wherein the darkroom is used for covering a graphite plate to be detected, the fixed light source is fixed at the top of the darkroom and irradiates the surface area of the graphite plate, the camera is fixed at the top of the darkroom, a camera lens is positioned in the darkroom and is aligned with the graphite plate, the device also comprises a processor used for carrying out smoothness identification according to the surface image of the graphite plate shot by the camera, and the processor is connected with the camera.
Preferably, the darkroom comprises a darkroom cover and a darkroom cover fixing tool, and the bottom of the darkroom cover is fixed on the detection plane through the darkroom cover fixing tool.
Preferably, the darkroom cover is in a trapezoid table shape, the central point of the top surface of the darkroom cover and the central point of the graphite plate are positioned on the same vertical line, and the camera is fixed at the central point of the top surface of the darkroom cover.
Preferably, the darkroom cover fixing tool comprises four first right-angle fixing blocks, and the four corners of the bottom of the darkroom cover are respectively fixed on the detection plane through one first right-angle fixing block.
Preferably, the area of the top surface of the dark chamber cover is not less than the surface area of the graphite plate.
Preferably, the graphite plate is fixed on the detection plane through a polar plate fixing tool.
Preferably, the polar plate fixing tool comprises a horizontal fixing block and a second right-angle fixing block, the second right-angle fixing block is used for limiting the position of a right angle formed by a first long edge and a first short edge on the graphite plate, and the horizontal fixing block is used for limiting the position of the first long edge on the graphite plate.
Preferably, the fixed light sources are arranged in a plurality of numbers and are uniformly distributed on the top of the darkroom.
Preferably, the fixed light sources are arranged in two rows and symmetrically distributed on two sides of the camera.
Preferably, the processor comprises a PC.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model designs a fuel cell graphite plate surface forming smoothness degree detection device, which is characterized in that a fixed light source is arranged in a darkroom and is irradiated on a graphite plate, so as to shoot a graphite plate photo and automatically analyze by adopting a processor, thereby realizing automatic detection and avoiding the defect that manual detection consumes manpower;
(2) the utility model discloses the darkroom cover is fixed through darkroom cover fixing tool among the device setting, and the graphite cake is fixed through polar plate tool, effectively guarantees both relative positions to what shoot can fix a position the region of treating the analysis in the photo fast, provides the convenience of follow-up computer processing greatly;
(3) the device of the utility model is simple in structure, easily popularizes and applies.
Drawings
Fig. 1 is a schematic structural view of a photographing tool in the device for detecting the surface finish of a graphite plate of a fuel cell of the present invention;
in the figure, 1 is a darkroom cover, 2 is a darkroom cover fixing tool, 3 is a graphite plate, 4 is a polar plate fixing tool, 5 is a fixed lamp source, and 6 is a camera.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Examples
The embodiment provides a device for detecting the surface forming smoothness of a graphite plate of a fuel cell, which comprises a photographing tool and a processor for recognizing the smoothness according to a surface image of the graphite plate 3 photographed by a camera 6, wherein the processor comprises a PC.
As shown in fig. 1, the photographing tool comprises a darkroom, a fixed light source 5 and a camera 6, wherein the darkroom is used for covering a graphite plate 3 to be detected, the fixed light source 5 is fixed at the top of the darkroom and irradiates the surface area of the graphite plate 3, the camera 6 is fixed at the top of the darkroom, and a lens of the camera 6 is positioned in the darkroom and aligned with the graphite plate 3;
the darkroom comprises a darkroom cover 1 and a darkroom cover fixing tool 2, and the bottom of the darkroom cover 1 is fixed on the detection plane through the darkroom cover fixing tool 2. The darkroom cover 1 is in a trapezoidal table shape, the central point of the top surface of the darkroom cover 1 and the central point of the graphite plate 3 are positioned on the same vertical line, and the camera 6 is fixed at the central point of the top surface of the darkroom cover 1. The darkroom cover fixing tool 2 comprises four first right-angle fixing blocks, and the four corners of the bottom of the darkroom cover 1 are fixed on the detection plane through the first right-angle fixing blocks respectively. The area of the top surface of the darkroom cover 1 is not less than the surface area of the graphite plate 3.
The graphite plate 3 is fixed on the detection plane through the polar plate fixing tool 4. The polar plate fixing tool 4 comprises a horizontal fixing block and a second right-angle fixing block, the second right-angle fixing block is used for limiting the position of a right angle formed by a first long edge and a first short edge on the graphite plate 3, and the horizontal fixing block is used for limiting the position of the first long edge on the graphite plate 3.
The fixed light sources 5 are arranged in a plurality of numbers and are uniformly distributed on the top of the darkroom, in the embodiment, the fixed light sources 5 are arranged in 6 numbers and are distributed on two sides of the camera 6, and each side is respectively provided with 3 numbers.
The specific principle of the smoothness detection of the fuel cell graphite plate surface forming smoothness detection device in the embodiment is as follows:
s1, placing the graphite plate 3 in a darkroom, adopting the fixed light source 5 to irradiate the surface area of the graphite plate 3, shooting the surface image of the graphite plate 3 by the camera 6, and when carrying out batch analysis, needing to use the same camera 6 to obtain photos with the same attribute, including: the size of the picture pixel, the magnification, the relative position of the target in the picture and the like, so that the subsequent batch process analysis is facilitated;
s2, in order to obtain a region of the fine analysis bipolar plate such as a groove, a ridge, or other region to be analyzed, the region may be intercepted using software and stored as a picture file for subsequent analysis;
s3, converting the area image to be analyzed into a gray image;
s4, acquiring the gray value of each pixel point in the gray image;
and S5, calculating the gray value distribution condition in the gray image, and determining the smoothness of the area to be analyzed according to the gray value distribution condition.
Step S5 specifically includes: determining a first numerical value and a second numerical value of the gray image according to the gray value, wherein the first numerical value is the ratio of the area of a black shadow area in the gray image to the total area, the second numerical value is the ratio of the standard deviation of the gray values of all pixel points except the black shadow area in the gray image to the mean value, and the smaller the first numerical value and the second numerical value, the higher the smoothness of the area to be analyzed is. Wherein, the black shadow area is determined as a pixel point with the gray value within the range of 0-30.
In the present embodiment, specifically:
firstly, a graphite bipolar plate sample is shot by using a digital camera 6, an image of a region to be analyzed is intercepted by using photoshop software and is stored as a JPG format picture, the size of the obtained picture is the same, and the pixel ratio is the same.
Further, the obtained pictures are imported into the software Matlab, and a data file is generated. Using the rbg2gray command, the data is converted to a gray pattern, known by MATLAB notation, which is an integer number of 8 bits (uint8) data, where the minimum value of 0 represents black and the maximum value of 255 represents white. Data in the middle of 0-255 are integer values that linearly reflect gray scale.
The data analysis mainly comprises two parts: the gray scale image forming method comprises a first numerical value and a second numerical value, wherein the first numerical value is the ratio of the area of a black shadow area in a gray scale image to the total area, the second numerical value is the ratio of standard deviation of gray scale values of all other pixel points except the black shadow area in the gray scale image to a mean value, and generally, the smaller the first numerical value and the second numerical value is, the better the forming effect is. The black area may be defined as a gray value of 0 to 30, and the ratio of the number of gray values in the range is counted to obtain a first value D,
wherein N is1The number of pixels with a gray scale value of 0 to 30 in the gray scale image, N2The number of pixel points with gray scale value larger than 30 in the gray scale image, N1+N2The total number of the pixel points in the gray level image is obtained;
the second value is obtained by:
wherein v is a second value, s is the standard deviation of the gray values of all the other pixels except the black shadow region in the gray image, and μ is a gray imageMean pixel value, A, of all other pixels in the image except the black shadow regioniIs the gray value of the ith pixel point.
The utility model discloses a detection device detects the principle of the bright and clean degree of graphite cake surface shaping and is: the particles used for forming the graphite plate are generally small expanded graphite flakes or graphite particles, have smooth surfaces when being extruded to be flat, and can effectively reflect light. When scale or granule are not under the coplanar, are in the powder state even, can't give out light, perhaps different with whole plane reflection of light direction, consequently if the bright and clean degree of graphite plate surface shaping is poor, then the image corresponding zone of shooting is black (convert pixel grey value trend to 0 behind the grey level image promptly, the utility model discloses confirm the regional black shadow region that is 0 ~ 30 within range with the grey level value), carry out the finish detection through the mode of shooting the photo from this, it is efficient, can also realize the quantitative characterization of finish through the quantitative analysis to the grey level value simultaneously, provide the device of high-efficient quantitative analysis graphite plate surface shaping bright and clean degree.
In this example, 3 regions were simultaneously cut out, wherein channel1 is a smooth contrast region and Rib2 and Rib3 are two target molding regions, and the analysis results are shown in table 1:
table 1 analysis and comparison table for smoothness of different areas of graphite plate 3
| Analysis area | First value | Second numerical value | Description of the invention |
| Channel1 | 0.2％ | 21.62％ | Smooth contrast areas |
| Rib2 | 28.49％ | 42.12％ | Target forming area |
| Rib3 | 35.69％ | 45.59％ | Target forming area |
Thus, it can be seen that the first value analyzed for target shaped regions Rib2 and Rib3 is significantly greater than the first value for Channel1 and the second value corresponding to Rib2 and Rib3 is greater than the second value for Channel1, as compared to the smooth contrast region Channel1, thus it can be seen that Rib2 and Rib3 are less bright than the Channel1 region and that Rib2 is less bright than the Rib3 region.
It should be noted that: the utility model discloses only require to protect the bright and clean degree detection device's of fuel cell graphite plate surface shaping concrete component structure, its concrete method that realizes the smooth finish and detect is not the utility model discloses the content of requiring protection.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. The device for detecting the surface forming smoothness of the graphite plate of the fuel cell is characterized by comprising a camera chamber, a fixed lamp source (5) and a camera (6), wherein the camera chamber is used for covering the graphite plate (3) to be detected, the fixed lamp source (5) is fixed at the top of the camera chamber and irradiates the surface area of the graphite plate (3), the camera (6) is fixed at the top of the camera chamber, a lens of the camera (6) is positioned in the camera chamber and is aligned with the graphite plate (3), the device further comprises a processor which is used for carrying out smoothness identification according to a surface image of the graphite plate (3) shot by the camera (6), and the processor is connected with the camera (6).
2. The device for detecting the surface forming smoothness of the graphite plate of the fuel cell as claimed in claim 1, wherein the darkroom comprises a darkroom cover (1) and a darkroom cover fixing tool (2), and the bottom of the darkroom cover (1) is fixed on the detection plane through the darkroom cover fixing tool (2).
3. The device for detecting the surface finish of the graphite plate of the fuel cell as claimed in claim 2, wherein the darkroom cover (1) is in a trapezoidal table shape, the center point of the top surface of the darkroom cover (1) and the center point of the graphite plate (3) are positioned on the same vertical line, and the camera (6) is fixed at the position of the center point of the top surface of the darkroom cover (1).
4. The device for detecting the surface forming smoothness of the graphite plate of the fuel cell as claimed in claim 3, wherein the darkroom cover fixing tool (2) comprises four first right-angle fixing blocks, and four corners of the bottom of the darkroom cover (1) are respectively fixed on the detection plane through one first right-angle fixing block.
5. The device for detecting the surface finish of the graphite plate of the fuel cell as claimed in claim 3, wherein the top surface area of the dark room cover (1) is not less than the surface area of the graphite plate (3).
6. The device for detecting the surface forming smoothness of the graphite plate of the fuel cell as claimed in claim 1, wherein the graphite plate (3) is fixed on the detection plane through a pole plate fixing tool (4).
7. The device for detecting the surface forming smoothness of the graphite plate of the fuel cell as claimed in claim 6, wherein the electrode plate fixing tool (4) comprises a horizontal fixing block and a second right-angle fixing block, the second right-angle fixing block is used for limiting the position of a right angle formed by a first long edge and a first short edge of the graphite plate (3), and the horizontal fixing block is used for limiting the position of the first long edge of the graphite plate (3).
8. The device for detecting the surface finish of the graphite plate of the fuel cell as claimed in claim 1, wherein the fixed light sources (5) are arranged in a plurality and uniformly distributed on the top of the darkroom.
9. The device for detecting the surface finish of the graphite plate of the fuel cell as claimed in claim 8, wherein the fixed light sources (5) are arranged in two rows and symmetrically distributed on both sides of the camera (6).
10. The apparatus as claimed in claim 1, wherein the processor comprises a PC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022676733.0U CN214277950U (en) | 2020-11-18 | 2020-11-18 | Fuel cell graphite plate surface forming smoothness detection device |
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| CN202022676733.0U CN214277950U (en) | 2020-11-18 | 2020-11-18 | Fuel cell graphite plate surface forming smoothness detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136990A (en) * | 2021-12-06 | 2022-03-04 | 平顶山市天宝特种材料有限公司 | Graphite section smoothness detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136990A (en) * | 2021-12-06 | 2022-03-04 | 平顶山市天宝特种材料有限公司 | Graphite section smoothness detection device |
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