CN114324372A - Appearance detection device for stainless steel coil - Google Patents
Appearance detection device for stainless steel coil Download PDFInfo
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- CN114324372A CN114324372A CN202111574490.2A CN202111574490A CN114324372A CN 114324372 A CN114324372 A CN 114324372A CN 202111574490 A CN202111574490 A CN 202111574490A CN 114324372 A CN114324372 A CN 114324372A
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 140
- 239000010935 stainless steel Substances 0.000 title claims abstract description 140
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 79
- 238000003384 imaging method Methods 0.000 claims abstract description 60
- 230000007547 defect Effects 0.000 claims abstract description 50
- 238000005286 illumination Methods 0.000 claims description 26
- 238000007689 inspection Methods 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
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Abstract
The invention discloses a stainless steel coil appearance detection device, which comprises: the device comprises a line scanning imaging system and an area array imaging system, wherein the line scanning imaging system and the area array imaging system are sequentially positioned on a path of a stainless steel coiled material to be detected moving along a conveying belt; the line scanning imaging system is used for detecting a first type of defects on the stainless steel coil to be detected; the area array imaging system is used for detecting the second type of defects on the stainless steel coil to be detected, wherein the stainless steel coil to be detected moves to the outlet of coil equipment along with the conveying belt after being formed to carry out coil, and the first type of defects are different from the second type of defects. The defect detection is carried out on the stainless steel coiled material in the stainless steel coiled material generation process, the method is suitable for online and offline detection, various defects of the stainless steel coiled material can be detected, and the detection efficiency and the detection accuracy are improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of defect detection, in particular to an appearance detection device for a stainless steel coil.
Background
The coiled material mainly refers to hot rolled round steel with the diameter of 5-9mm and deformed steel with the diameter of less than 10 mm. Most are supplied as coils, also known as coils or coils, by coiling in a coiler. The wire is mainly used as a reinforcement and a welding structural member of reinforced concrete or a raw material for reprocessing (such as wire drawing, making and the like). Thus, whether the appearance of the wire is flat or whether there are defects has a crucial influence on the processing of the structural member. Therefore, in the roll forming process, the appearance of the roll needs to be inspected.
At present, the appearance detection of stainless steel coil materials has the following difficulties: the web cannot be fully inspected. After the stainless steel coil is produced, the stainless steel coil can be coiled into a coil, only one part of the coil which leaks outwards can be subjected to sampling inspection, and most of the coil which is coiled inside cannot be detected. Meanwhile, the detection is mainly manual, and the detection accuracy, consistency and detection efficiency are low.
Disclosure of Invention
The invention provides a stainless steel coil appearance detection device, which is used for detecting defects of a stainless steel coil in a stainless steel coil generation process and detecting various defects of the stainless steel coil.
In order to achieve the above object, an embodiment of the present invention provides an appearance detection apparatus for a stainless steel coil, including:
the device comprises a line scanning imaging system and an area array imaging system, wherein the line scanning imaging system and the area array imaging system are sequentially positioned on a path of a stainless steel coiled material to be detected moving along a conveying belt; the line scanning imaging system is used for detecting a first type of defects on the stainless steel coil to be detected; the area array imaging system is used for detecting the second type of defects on the stainless steel coil to be detected, wherein the stainless steel coil to be detected moves to the outlet of coil equipment along with the conveying belt after being formed to carry out coil, and the first type of defects are different from the second type of defects.
According to one embodiment of the present invention, the line-scan imaging system includes: a multi-level illumination source, a line scan camera, and a controller;
the optical axis direction of the line scanning camera forms a first included angle with the first direction, each illumination light source in the multi-stage illumination light sources is sequentially away from the first direction, and the included angle between the light beam emergent direction of each illumination light source and the first direction is sequentially a second included angle to an nth included angle; the second included angle and the nth included angle are sequentially increased, the first direction is perpendicular to the surface of the stainless steel coiled material to be detected, n is a positive integer, and n is greater than 2;
the controller is used for controlling the multistage illuminating light sources to be sequentially and alternately lightened, and controlling the line scanning camera to carry out image acquisition on the surface of the stainless steel coiled material to be detected when one of the multistage illuminating light sources is lightened.
According to one embodiment of the present invention, a multi-stage illumination source includes: a first light source and a second light source;
the light beam emergent direction of the first light source and the first direction form a second included angle, the light beam emergent direction of the second light source and the first direction form a third included angle, and the second included angle is smaller than the third included angle;
the controller is used for controlling the first light source and the second light source to be alternately turned on and off; and controlling the line scanning camera to acquire images of the surface of the stainless steel coiled material to be detected when the first light source is lightened, and acquiring images of the surface of the stainless steel coiled material to be detected when the second light source is lightened.
According to an embodiment of the invention, said first angle is in the range of 9 ° to 11 °, said second angle is in the range of 10 ° to 12 °, and said third angle is in the range of 15 ° to 30 °.
According to one embodiment of the present invention, the area array imaging system includes: the device comprises an area-array camera, a surface light source and a stripe grating;
the surface light source is characterized in that a stripe grating is arranged in the light beam emergent direction of the surface light source, light beams passing through the stripe grating are incident to the surface of the stainless steel coiled material to be detected, and are incident to the area array camera after being reflected by the surface of the stainless steel coiled material to be detected, and the area array camera is used for collecting images of the surface of the stainless steel coiled material to be detected.
According to one embodiment of the invention, the optical axis of the area-array camera is parallel to the first direction, and the first direction is a direction perpendicular to the surface of the stainless steel coiled material to be detected; the device also comprises a semi-transparent semi-reflecting mirror;
the light beam emergent direction of the surface light source is perpendicular to the first direction, the light beam emergent from the surface light source is reflected to the surface of the stainless steel coiled material to be detected through the semi-transparent semi-reflector after passing through the stripe grating, and is transmitted and incident to the area array camera through the semi-transparent semi-reflector after being reflected by the surface of the stainless steel coiled material to be detected.
According to an embodiment of the invention, an included angle between an optical axis of the area-array camera and the first direction is the same as and greater than 0 ° with respect to an included angle between a direction in which the light beam of the surface light source exits and the first direction, and the first direction is a direction perpendicular to the surface of the stainless steel coiled material to be detected.
According to one embodiment of the invention, the striped grating is a black and white striped grating.
According to one embodiment of the invention, the resolution of the line scan camera is one of 4K or 8K or 16K.
According to one embodiment of the invention, the resolution of the area-array camera is one of 29M, 65M, 101M and 151M.
The appearance detection device for the stainless steel coil provided by the embodiment of the invention comprises: the device comprises a line scanning imaging system and an area array imaging system, wherein the line scanning imaging system and the area array imaging system are sequentially positioned on a path of a stainless steel coiled material to be detected moving along a conveying belt; the line scanning imaging system is used for detecting a first type of defects on the stainless steel coil to be detected; the area array imaging system is used for detecting the second type of defects on the stainless steel coil to be detected, wherein the stainless steel coil to be detected moves to the outlet of coil equipment along with the conveying belt after being formed to carry out coil, and the first type of defects are different from the second type of defects. The defect detection is carried out on the stainless steel coiled material in the stainless steel coiled material generation process, the method is suitable for online and offline detection, various defects of the stainless steel coiled material can be detected, and the detection efficiency and the detection accuracy are improved.
Drawings
Fig. 1 is a schematic structural diagram of an appearance inspection apparatus for a stainless steel coil according to an embodiment of the present invention;
fig. 2 is a schematic optical path diagram of a line scanning imaging system in the device for detecting the appearance of a stainless steel coil according to an embodiment of the present invention;
fig. 3 is a schematic optical path diagram of an area array imaging system in the stainless steel coil appearance inspection device according to an embodiment of the present invention;
fig. 4 is a schematic optical path diagram of an area array imaging system in a stainless steel coil appearance inspection device according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a striped grating in an area array imaging system in an appearance inspection apparatus for a stainless steel coil according to another embodiment of the present invention;
fig. 6 is a schematic diagram of imaging details in an area array imaging system in an appearance inspection apparatus for stainless steel coil according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of an appearance inspection device for a stainless steel coil according to an embodiment of the present invention. As shown in fig. 1, the appearance inspection apparatus 100 for stainless steel coil includes:
the line scanning imaging system 200 and the area array imaging system 300 are sequentially positioned on a path of the stainless steel coiled material 400 to be detected moving along with the conveyor belt 500; the line scanning imaging system 200 is used for detecting a first type of defect on the stainless steel coiled material 400 to be detected; the area array imaging system 300 is used for detecting the second type of defects on the stainless steel coiled material 400 to be detected, wherein the stainless steel coiled material 400 to be detected moves to the outlet of the coiled material equipment along with the conveyor belt 500 after being formed to be coiled, and the first type of defects are different from the second type of defects.
It can be understood that, after the stainless steel coiled material 400 to be detected is formed, the stainless steel coiled material moves along the conveyor belt 500, the moving speed and the moving distance can be controlled by an encoder signal of the driving motor, and finally the coiled material is fed to the outlet of the coiled material device, and the linear scanning imaging system 200 and the area array imaging system 300 are sequentially arranged on the path of the stainless steel coiled material 400 to be detected moving along the conveyor belt 500, wherein the linear scanning imaging system 200 and the area array imaging system 300 can be arranged in tandem along the path of the stainless steel coiled material 400 to be detected, specifically which imaging system is arranged in front, and which imaging system is arranged behind, which is not particularly limited in this invention.
When the stainless steel coiled material 400 to be detected moves along with the conveyor belt 500, the line scanning imaging system 200 detects a first type of defect on the stainless steel coiled material 400 to be detected, and the area array imaging system 300 detects a second type of defect on the stainless steel coiled material 400 to be detected. The first type of defects are scratches and concave-convex point defects, the surface deformation change of the stainless steel coiled material 400 to be detected is severe, the second type of defects are indentations and creases, and the surface deformation change of the stainless steel coiled material 400 to be detected is slight. From this, when waiting to detect stainless steel coiled material 400 and following conveyer belt 500 motion, stainless steel coiled material outward appearance detection device 100 has just been treated various defects on detecting stainless steel coiled material 400 and has been detected, has avoided can only carrying out the spot check by the manual work to the marginal part of stainless steel coiled material, has promoted detection efficiency and the accuracy that detects.
Fig. 2 is a schematic optical path diagram of a line scan imaging system in a stainless steel coil appearance inspection apparatus according to an embodiment of the present invention; as shown in fig. 2, the line-scan imaging system 200 includes: a multi-stage illumination source 201, a line scan camera 202, and a controller 203;
the optical axis direction of the line scanning camera 202 forms a first included angle theta 1 with the first direction x, each illumination light source in the multi-stage illumination light sources 201 is sequentially away from the first direction x, and the included angles between the light beam emergent direction of each illumination light source 201 and the first direction x are sequentially a second included angle to an nth included angle; the second included angle to the nth included angle are sequentially increased, the first direction x is a direction perpendicular to the surface of the stainless steel coiled material 400 to be detected, n is a positive integer, and n is greater than 2;
the controller 203 is used for controlling the multi-stage illumination light sources 201 to be sequentially and alternately lighted, and controlling the linear scanning camera 202 to acquire images of the surface of the stainless steel coiled material 400 to be detected when one of the multi-stage illumination light sources 201 is lighted.
The multi-level illumination source 201 may be a second level illumination source, a third level illumination source, or a fourth level illumination source, where the second level illumination source includes two light sources, the third level illumination source includes three light sources, and the fourth level illumination source includes four light sources. When the multi-stage illumination light source 201 includes four light sources, the included angles between the light beam emitting directions of the first light source, the second light source, the third light source, and the fourth light source and the first direction x are sequentially increased, that is, the first light source, the second light source, the third light source, and the fourth light source are sequentially away from the first direction x. The light sources in the multi-stage illumination light source 201 are all linear light sources.
For example, the angle between the line scan camera 202 and the first direction x is a first angle, the angle between the first light source and the first direction x is a second angle, the angle between the second light source and the first direction x is a third angle, the angle between the third light source and the first direction x is a fourth angle, and the angle between the fourth light source and the first direction x is a fifth angle.
If the third light source is a bright field light source and the rest are dark field light sources, the controller 203 may first control the first light source to be turned on and the rest to be turned off, the line scan camera 202 collects a line of surface images of the stainless steel coil material 400 to be detected, then control the second light source to be turned on and the rest to be turned off, the line scan camera 202 further collects a line of surface images of the stainless steel coil material 400 to be detected, then control the third light source to be turned on and the rest to be turned off, the line scan camera 202 further collects a line of surface images of the stainless steel coil material 400 to be detected, then control the fourth light source to be turned on and the rest to be turned off, and the line scan camera 202 further collects a line of surface images of the stainless steel coil material 400 to be detected; after cyclically illuminating the first to fourth light sources, the line-scan camera 202 obtains four rows of surface images of the same position of the stainless steel coil 400 to be inspected. And then sequentially and cyclically lighting the first light source to the fourth light source, and sequentially cyclically, wherein the line scanning camera 202 can acquire the whole image of the surface of the stainless steel coiled material 400 to be detected. So, through the setting of four light sources, set up four light fields, through the whole image on stainless steel coiled material 400 surface that line sweep camera 202 obtained, can take out the image on stainless steel coiled material 400 surface of difference under four light fields, and then can go to look for the first type defect on stainless steel coiled material 400 surface according to four different images.
In other embodiments, there may be more light sources arranged, and in practice the number of light sources may be easily detected with the first type of defects and may be considered to be low cost.
According to a preferred embodiment of the present invention, as shown in fig. 2, a multi-stage illumination light source 201 includes: a first light source 201a and a second light source 201 b;
the light beam emitting direction of the first light source 201a forms a second included angle theta 2 with the first direction x, the light beam emitting direction of the second light source 201b forms a third included angle theta 3 with the first direction x, wherein the second included angle theta 2 is smaller than the third included angle theta 3;
the controller 203 is used for controlling the first light source 201a and the second light source 201b to be alternately turned on and off; and the linear scanning camera 202 is controlled to acquire an image of the surface of the stainless steel coiled material 400 to be detected when the first light source 201a is turned on, and to acquire an image of the surface of the stainless steel coiled material 400 to be detected when the second light source 201b is turned on.
Wherein the first angle θ 1 is in a range of 9 ° to 11 ° (preferably 10 °), the second angle θ 2 is in a range of 10 ° to 12 ° (preferably 11 °), and the third angle θ 3 is in a range of 15 ° to 30 °.
In the preferred embodiment, the first light source 201a is a bright field light source, the second light source 201b is a dark field light source, the controller 203 images the surface of the stainless steel coil 400 to be detected by the line scan camera 202 through the alternate on and off of the first light source 201a and the second light source 201 b. The imaging process and the defect detection process are the same as those described in the previous embodiment, and are not described again in this embodiment. A recessed defect may be detected when the bright field light source is illuminated, and a raised defect may be detected when the dark field light source is illuminated.
Thus, the first type of defect in the stainless steel coil 400 to be inspected during movement can be identified by the line scan camera 202. According to one embodiment of the invention, the resolution of the line scan camera is one of 4K or 8K or 16K. Preferably 8k resolution.
Fig. 3 is a schematic optical path diagram of an area array imaging system in a stainless steel coil appearance inspection device according to an embodiment of the present invention; as shown in fig. 3, the area array imaging system 300 includes: an area-array camera 301, a surface light source 302 and a stripe grating 303;
the stripe grating 303 is arranged in the light beam emergent direction of the surface light source 302, the light beam passing through the stripe grating 303 enters the surface of the stainless steel coiled material 400 to be detected, and after being reflected by the surface of the stainless steel coiled material 400 to be detected, the light beam enters the area array camera 301, and the area array camera 301 collects images of the surface of the stainless steel coiled material 400 to be detected.
It should be noted that, the light beam emitted from the surface light source 302 forms a stripe light source after passing through the stripe grating 303, if the stripe light source is incident on the surface of the stainless steel coil 400 to be detected without defects, the image formed on the surface of the stainless steel coil 400 to be detected by the area array camera 301 is still a regular stripe, otherwise, if the stripe light source is incident on the surface of the stainless steel coil 400 to be detected with defects (folds and slight surface deformation), the image formed on the surface of the stainless steel coil 400 to be detected by the area array camera 301 is an irregular stripe or a deformed stripe. Therefore, the second type of defects of the stainless steel coil 400 to be detected can be detected through the surface light source 302, the stripe grating 303 and the area array camera 301.
According to one embodiment of the present invention, as shown in fig. 3, an included angle between the optical axis of the area-array camera 301 and the first direction x is the same as and greater than 0 ° with respect to the direction in which the light beam of the surface light source 302 exits and the first direction x, and the first direction x is a direction perpendicular to the surface of the stainless steel coil 400 to be detected.
That is to say, the area-array camera 301 and the surface light source 302 are located on one side of the surface of the stainless steel coil 400 to be detected and located on two sides perpendicular to the first direction x, and the light beam emitted from the surface light source 302 directly enters the surface of the stainless steel coil 400 to be detected, so that no loss of light energy occurs without passing through an intermediate conversion component, and the image of the surface of the stainless steel coil 400 to be detected acquired by the area-array camera 301 is clearer.
Fig. 4 is a schematic optical path diagram of an area array imaging system in a stainless steel coil appearance inspection device according to another embodiment of the present invention; as shown in fig. 4, the optical axis of the area-array camera 301 is parallel to a first direction x, which is a direction perpendicular to the surface of the stainless steel coil 400 to be detected; further comprises a half mirror 304;
the light beam emergent direction of the surface light source 302 is perpendicular to the first direction x, the light beam emergent from the surface light source 302 passes through the stripe grating 303, then is reflected to the surface of the stainless steel coiled material 400 to be detected through the semi-transparent semi-reflective mirror 304, and then is transmitted and incident to the area array camera 301 through the semi-transparent semi-reflective mirror 304 after being reflected by the surface of the stainless steel coiled material 400 to be detected.
The half mirror 304 may be a 45-degree half mirror.
Through the arrangement of the half-transmitting and half-reflecting mirror 304, the optical axis of the area array camera 301 and the light beam emitted by the surface light source 302 are coaxial with the light beam incident to the stainless steel coiled material 400 to be detected after passing through the stripe grating 303.
Fig. 5 is a schematic structural diagram of a striped grating in an area array imaging system in a stainless steel coil appearance inspection apparatus according to another embodiment of the present invention; as shown in fig. 5, the stripe grating 303 is a black and white stripe grating. Wherein, the widths of the black and white stripes are the same and can be 1 mm.
According to one embodiment of the invention, the resolution of the area-array camera 301 is one of 29M, 65M, 101M, and 151M.
It is to be understood that, in the embodiment shown in fig. 3 and 4, fig. 6 is a detailed image diagram of an image formation system in an area array imaging system in a stainless steel coil appearance inspection apparatus according to another embodiment of the present invention, as shown in fig. 6, when a crease is formed on the surface of a stainless steel coil 400 to be inspected, the surface of the stainless steel coil 400 to be inspected at the point has an angle α with respect to the horizontal plane of the whole stainless steel coil 400 to be inspected, and if the surface of the stainless steel coil 400 to be inspected is free of defects, the stripe at the point a originally existed at the point a can not be imaged, and the stripe at the point B shifted by 2 α can be imaged.
In summary, the appearance inspection device for stainless steel coil provided by the embodiment of the invention includes: the device comprises a line scanning imaging system and an area array imaging system, wherein the line scanning imaging system and the area array imaging system are sequentially positioned on a path of a stainless steel coiled material to be detected moving along a conveying belt; the line scanning imaging system is used for detecting a first type of defects on the stainless steel coil to be detected; the area array imaging system is used for detecting the second type of defects on the stainless steel coil to be detected, wherein the stainless steel coil to be detected moves to the outlet of coil equipment along with the conveying belt after being formed to carry out coil, and the first type of defects are different from the second type of defects. The defect detection is carried out on the stainless steel coiled material in the stainless steel coiled material generation process, the method is suitable for online and offline detection, various defects of the stainless steel coiled material can be detected, and the detection efficiency and the detection accuracy are improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a stainless steel coil appearance detection device which characterized in that includes:
the device comprises a line scanning imaging system and an area array imaging system, wherein the line scanning imaging system and the area array imaging system are sequentially positioned on a path of a stainless steel coiled material to be detected moving along a conveying belt; the line scanning imaging system is used for detecting a first type of defects on the stainless steel coil to be detected; the area array imaging system is used for detecting the second type of defects on the stainless steel coil to be detected, wherein the stainless steel coil to be detected moves to the outlet of coil equipment along with the conveying belt after being formed to carry out coil, and the first type of defects are different from the second type of defects.
2. The apparatus for inspecting appearance of stainless steel coil according to claim 1, wherein the line scan imaging system comprises: a multi-level illumination source, a line scan camera, and a controller;
the optical axis direction of the line scanning camera forms a first included angle with the first direction, each illumination light source in the multi-stage illumination light sources is sequentially away from the first direction, and the included angle between the light beam emergent direction of each illumination light source and the first direction is sequentially a second included angle to an nth included angle; the second included angle and the nth included angle are sequentially increased, the first direction is perpendicular to the surface of the stainless steel coiled material to be detected, n is a positive integer, and n is greater than 2;
the controller is used for controlling the multistage illuminating light sources to be sequentially and alternately lightened, and controlling the line scanning camera to carry out image acquisition on the surface of the stainless steel coiled material to be detected when one of the multistage illuminating light sources is lightened.
3. The appearance inspection device for stainless steel coil material according to claim 2, wherein the multi-stage illumination light source comprises: a first light source and a second light source;
the light beam emergent direction of the first light source and the first direction form a second included angle, the light beam emergent direction of the second light source and the first direction form a third included angle, and the second included angle is smaller than the third included angle;
the controller is used for controlling the first light source and the second light source to be alternately turned on and off; and controlling the line scanning camera to acquire images of the surface of the stainless steel coiled material to be detected when the first light source is lightened, and acquiring images of the surface of the stainless steel coiled material to be detected when the second light source is lightened.
4. The appearance inspection device for stainless steel coil material according to claim 3, wherein the first included angle is in a range of 9 ° to 11 °, the second included angle is in a range of 10 ° to 12 °, and the third included angle is in a range of 15 ° to 30 °.
5. The apparatus for inspecting appearance of stainless steel coil according to claim 1, wherein the area array imaging system comprises: the device comprises an area-array camera, a surface light source and a stripe grating;
the surface light source is characterized in that a stripe grating is arranged in the light beam emergent direction of the surface light source, light beams passing through the stripe grating are incident to the surface of the stainless steel coiled material to be detected, and are incident to the area array camera after being reflected by the surface of the stainless steel coiled material to be detected, and the area array camera is used for collecting images of the surface of the stainless steel coiled material to be detected.
6. The appearance detection device for the stainless steel coil according to claim 5, wherein an optical axis of the area-array camera is parallel to the first direction, and the first direction is a direction perpendicular to the surface of the stainless steel coil to be detected; the device also comprises a semi-transparent semi-reflecting mirror;
the light beam emergent direction of the surface light source is perpendicular to the first direction, the light beam emergent from the surface light source is reflected to the surface of the stainless steel coiled material to be detected through the semi-transparent semi-reflector after passing through the stripe grating, and is transmitted and incident to the area array camera through the semi-transparent semi-reflector after being reflected by the surface of the stainless steel coiled material to be detected.
7. The appearance detection device for the stainless steel coil according to claim 5, wherein an included angle between an optical axis of the area-array camera and the first direction is the same as and greater than 0 ° with respect to an included angle between an exit direction of the light beam from the surface light source and the first direction, and the first direction is perpendicular to the surface of the stainless steel coil to be detected.
8. The appearance inspection device for stainless steel coil material according to claim 5, wherein the striped grating is black and white striped grating.
9. The appearance inspection device for stainless steel coil material according to claim 2, wherein the resolution of the line scan camera is one of 4K, 8K and 16K.
10. The appearance inspection device for stainless steel coil material according to claim 5, wherein the resolution of the area-array camera is one of 29M, 65M, 101M and 151M.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117250203A (en) * | 2023-11-10 | 2023-12-19 | 深圳市玻尔智造科技有限公司 | Graphite coiled material detection method and system |
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