CN219956424U - Machine vision detection device - Google Patents

Abstract

The utility model provides a machine vision detection device which comprises a main body frame, an industrial personal computer, a transmission mechanism arranged in the main body frame, a first linear array light source, a second linear array light source, a color linear array camera, a photoelectric switch, a photoelectric encoder and a light source controller. The conveying mechanism is positioned between the first linear array light source and the second linear array light source in the main body frame; the first linear array light source is arranged on the upper part of the main body frame through the first light source bracket and is positioned on one side facing the detection surface of the product to be detected, the second linear array light source is positioned on one side facing away from the detection surface of the product to be detected through the second light source bracket, and the irradiation areas of the first linear array light source and the second linear array light source are at least partially overlapped; along the height direction of the machine vision detection device, the color linear array camera is arranged above the first linear array light source through the camera bracket, and the color linear array camera collects images of the detection surface of the product to be detected at the overlapping part of the irradiation areas of the first linear array light source and the second linear array light source; the industrial personal computer is electrically connected with the color linear array camera.

Description

Machine vision detection device

Technical Field

The utility model relates to the technical field of visual detection equipment, in particular to a machine visual detection device.

Background

In the photovoltaic industry, after the welding of the battery sheet assembly is completed, in order to ensure the product quality, it is generally necessary to perform dimension measurement and defect detection by means of machine vision. Specific measurement and detection items include: pole piece distance, creepage distance, current collector belt and subassembly edge distance, EVA membrane surpass the edge, weld area position offset, weld area surpass, foreign matter etc.. The method requires that the detection target and the background are well distinguished on the image, but the difference between the gray values of the detection target and the background is not large in the image acquired by the existing visual hardware scheme, the contrast is not high, great difficulty is brought to image processing, and the accuracy and the stability of machine vision measurement and detection are seriously affected.

Disclosure of Invention

The embodiment of the utility model aims to provide a machine vision detection device so as to improve the accuracy and stability of machine vision measurement. The specific technical scheme is as follows:

the utility model provides a machine vision detection device, which comprises a main body frame, an industrial personal computer, a transmission mechanism, a first linear array light source, a second linear array light source, a color linear array camera, a photoelectric switch, a photoelectric encoder and a light source controller, wherein the transmission mechanism, the first linear array light source, the second linear array light source, the color linear array camera, the photoelectric switch, the photoelectric encoder and the light source controller are arranged in the main body frame; the conveying mechanism is positioned between the first linear array light source and the second linear array light source in the main body frame along the height direction of the machine vision detection device and is used for conveying products to be detected; the first linear array light source is arranged on the upper part of the main body frame through a first light source bracket and is positioned on one side facing the detection surface of the product to be detected, the second linear array light source is arranged on one side facing away from the detection surface of the product to be detected through a second light source bracket, and the irradiation areas of the first linear array light source and the second linear array light source are at least partially overlapped; the color line-up camera is arranged above the first line-up light source through a camera bracket along the height direction of the machine vision detection device, and the color line-up camera collects images of the detection surface of the product to be detected at the overlapping part of the irradiation areas of the first line-up light source and the second line-up light source; the photoelectric switch is electrically connected with the color linear array camera and is used for generating a frame trigger signal of the color linear array camera when the product to be detected enters the main body frame; the photoelectric encoder is used for contacting with the product to be detected, and generating a row trigger signal of the color linear array camera when the product to be detected enters the main body frame; the light source controller is electrically connected with the first linear array light source and the second linear array light source; the industrial personal computer is electrically connected with the color linear array camera.

In some embodiments, the first linear array light source is a blue coaxial array light source coaxial with the color linear array camera; the second linear array light source is a red linear array light source.

In some embodiments, the conveying mechanism comprises a first mounting frame and at least one roller, the main body frame comprises a first beam and a second beam which are arranged along the length direction of the machine vision detection device, the first beam and the second beam are arranged at intervals in parallel along the conveying direction of the product to be detected, the first mounting frame is mounted on the first beam and the second beam, and at least one roller is mounted on the first mounting frame.

In some embodiments, the first mounting frame is provided with two rollers which are arranged in parallel and at intervals; the second light source support is arranged in the first mounting frame, the second linear array light source is mounted on the first mounting frame and located at an interval position between the two rollers.

In some embodiments, the machine vision inspection device further includes a first conveyor and a second conveyor located outside the main body frame, the main body frame including a conveyor inlet and a conveyor outlet in communication with the conveyor mechanism, the first conveyor being disposed on the conveyor inlet side and the second conveyor being disposed on the conveyor outlet side.

In some embodiments, the optoelectronic switch is mounted to the first mount, and an upper surface of the optoelectronic switch is lower than an upper surface of the drum.

In some embodiments, the photoelectric encoder is connected to the first mounting frame through the second mounting frame, so that a roller of the photoelectric encoder is used for contacting with the product to be detected, and the product to be detected can drive the roller to rotate in the conveying process.

In some embodiments, the photoelectric switch and the photoelectric encoder are disposed at a side close to the conveying inlet and are sequentially arranged along a conveying direction of the product to be detected.

In some embodiments, the main body frame further includes a third beam and a fourth beam respectively disposed on the upper portions of the first beam and the second beam, and third mounting frames are disposed on the third beam and the fourth beam, and the third mounting frames include the camera bracket and the first light source bracket; the color linear array camera and the first linear array light source are arranged on the third cross beam and the fourth cross beam at intervals along the direction far away from the product to be detected through the third mounting frame.

In some embodiments, the machine vision inspection device further comprises a switching power supply disposed on a side wall of the main body frame, the switching power supply for powering the optoelectronic switch and the optoelectronic encoder.

In some embodiments, the machine vision detection device further comprises a light source controller mounted on the side wall or the bottom wall of the main body frame, the light source controller and the industrial personal computer are arranged in parallel along the height direction or the length direction, and the light source controller is electrically connected with the first linear array light source and the second linear array light source.

The machine vision detection device provided by the embodiment of the utility model adopts the color line camera to collect the images, and compared with a black-and-white line camera, the quality of the collected images can be improved, so that the contrast between a detection target and a background is increased. The machine vision detection device comprises a first linear array light source and a second linear array light source, the first linear array light source emits light of a first color and irradiates a detection surface of a product to be detected, and the light of the first color can play a role in enhancing a measuring target and a detecting target on the upper surface of the pole piece, so that the brightness of a photographed image can be enhanced. The second linear array light source emits light of a second color and irradiates the back surface of the detection surface, and the light of the second color can play a role in enhancing the contrast ratio of the measurement target and the detection target with the background. The areas irradiated by the first linear array light source and the second linear array light source are at least partially overlapped, so that the image shot by the color linear array camera can have enough brightness and enough contrast, the quality of the acquired image can be improved, and the accuracy and the stability of machine vision measurement are improved. The conveying mechanism is used for conveying the product to be detected, so that the color linear array camera can perform line-by-line image scanning, and the image with a larger size can be conveniently shot.

Of course, it is not necessary for any of the products embodying the embodiments of the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of a machine vision inspection device according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the machine vision inspection device of FIG. 1 with the first conveyor and the second conveyor removed;

FIG. 3 is a side view of FIG. 2;

FIG. 4a is a schematic diagram showing a second linear array light source and a transmission mechanism in FIG. 2;

FIG. 4b is a front view of FIG. 4 a;

FIG. 5a is a detailed schematic diagram of the color line camera and the first line source of FIG. 2;

FIG. 5b is a front view of FIG. 5 a;

FIG. 6 is a top view of the machine vision inspection device of FIG. 1;

FIG. 7 is a front view of the machine vision inspection device of FIG. 1;

FIG. 8 is a side view of the machine vision inspection device of FIG. 1;

FIG. 9 is a schematic diagram of a machine vision inspection device according to another embodiment of the present utility model;

FIG. 10 is a gray scale view of a color image captured by the machine vision inspection device of FIGS. 1 and 9;

FIG. 11 is a gray scale image of a first color channel obtained after processing by an industrial personal computer;

fig. 12 is a gray scale image of the second color channel obtained after processing by the industrial personal computer.

The reference numerals are as follows:

a main body frame 100; a first cross member 101; a second beam 102; a first mounting frame 103; a side wing plate 1031; a third cross member 104; a fourth cross member 105; a third mount 106; a transfer inlet 108; a transfer outlet 107; a bracket 109; a color line camera 200; a lens 201; an optoelectronic switch 202; a switching power supply 203; a photoelectric encoder 204; a second mount 2041; a roller 2042; a camera mount 205; a first linear array light source 300; a first connection terminal 301; a first light source holder 302; a second linear array light source 400; a second connection terminal 401; a second light source holder 402; a conveying mechanism 500; a drum 501; a light source controller 600; the industrial personal computer 700; a first transfer device 800; a second transfer device 900; pole piece distance L1; the distance L2 between the bus bar and the edge of the pole piece component; the product S to be detected; welding area a.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by the person skilled in the art based on the present utility model are included in the scope of protection of the present utility model.

The utility model provides a machine vision detection device which can be used for measuring the dimension of a product S to be detected of a battery piece assembly or detecting surface defects and the like of the product S to be detected.

As shown in fig. 1 and 2, the machine vision inspection apparatus includes a main body frame 100, an industrial personal computer 700, and a transfer mechanism 500, a first linear light source 300, a second linear light source 400, a color linear camera 200, a photoelectric switch 202, a photoelectric encoder 204, and a light source controller 600 provided inside the main body frame 100. The conveying mechanism 500 is located between the first linear array light source 300 and the second linear array light source 400 in the main body frame 100 along the height direction of the machine vision inspection device, and is used for conveying the product S to be inspected; the first linear array light source 300 is arranged at the upper part of the main body frame 100 through the first light source bracket 302 and is positioned at one side facing the detection surface of the product S to be detected, the second linear array light source 400 is arranged at one side facing away from the detection surface of the product S to be detected through the second light source bracket 402, and the irradiation areas of the first linear array light source 300 and the second linear array light source 400 are at least partially overlapped; along the height direction of the machine vision detection device, the color line camera 200 is arranged above the first line light source 300 through the camera bracket 205, and the color line camera 200 collects images of the detection surface of the product S to be detected at the overlapping part of the irradiation areas of the first line light source 300 and the second line light source 400; the photoelectric switch 202 is electrically connected to the color line camera 200, and is configured to generate a frame trigger signal of the color line camera 200 when the product S to be detected enters the main body frame 100. The photoelectric encoder 204 is used for contacting with the product S to be detected, and generating a line trigger signal of the color line camera 200 when the product S to be detected enters the main body frame 100. The light source controller 600 is electrically connected with the first and second linear array light sources 300 and 400; the industrial personal computer 700 is electrically connected with the color line camera 200.

In this embodiment, the machine vision detection device adopts the color line camera 200 to collect images, and compared with the black-and-white line camera, the quality of the collected images can be improved, so that the contrast between the detection target and the background is increased, and the gray scale of the color image collected by the color line camera 200 is shown in fig. 10. And the machine vision detection device comprises a first linear array light source 300 and a second linear array light source 400, wherein the first linear array light source 300 emits light of a first color and irradiates a detection surface of a product S to be detected, and the light of the first color can play a role in enhancing a measuring target and a detection target on the upper surface of the pole piece, namely, the brightness of an image after photographing can be enhanced. The second linear array light source 400 emits light of a second color and irradiates the back surface of the detection surface, and the light of the second color can play a role in enhancing the contrast between the measurement target and the detection target and the background. The areas illuminated by the first linear array light source 300 and the second linear array light source 400 are at least partially overlapped, so that the image shot by the color linear array camera 200 can have enough brightness and enough contrast, the quality of the acquired image can be improved, and the accuracy and the stability of machine vision measurement are improved. The conveying mechanism 500 is used for conveying the product S to be detected in the horizontal direction, so that the color line camera 200 can perform image scanning line by line, and is convenient for capturing images of larger sizes.

The first linear array light source 300 and the second linear array light source 400 are respectively installed in the main body frame 100 with the first light source bracket 302 and the second light source bracket 402, and the color linear array camera 200 is installed in the main body frame 100 through the camera bracket 205, so that the first linear array light source 300, the second linear array light source 400 and the color linear array camera 200 can be conveniently and independently installed and fixed.

It should be noted that, the first linear array light source 300 irradiates the detection surface of the product S to be detected, the second linear array light source 400 irradiates the back surface of the detection surface of the product S to be detected, the overlapping of the irradiation areas refers to that when the product S to be detected is not present, the two irradiation areas irradiate the same area, and when the product S to be detected is placed, the overlapping of the irradiation areas refers to that the orthographic projection of the detection surface on the back surface of the detection surface overlaps with the irradiation area of the second linear array light source 400 on the back surface of the detection surface.

As shown in fig. 1 to fig. 9, the machine vision detection device is used for measuring the size of the product S to be detected or detecting the surface defect of the product S to be detected, wherein the product S to be detected can be, but is not limited to, a pole piece assembly, and when the product S to be detected is a pole piece assembly, the machine vision detection device is mainly used for detecting the quality of a welding area a of the pole piece assembly, and as shown in fig. 10 and fig. 11, the area a is the welding area.

Because the first linear array light source 300 and the second linear array light source 400 are respectively arranged above and below the product to be detected S, the color linear array camera 200 can respectively extract the image effects of the coaxial linear array light source of the first color and the linear array backlight of the second color corresponding to the detection surface by taking an image only once, and the detection efficiency is improved.

In practical applications, the number of the color line camera 200, the first line light source 300, and the second line light source 400 may be determined according to the size of the product S to be detected. As shown in fig. 1 and 2, in case that the product S to be detected is wide, 3 color line cameras 200, 3 first line light sources 300, and 3 second line light sources 400 may be provided. Wherein, along the height direction of the machine vision inspection device, each color line camera 200 corresponds to 1 first line light source 300 and 1 second line light source 400.

In some embodiments, as shown in fig. 3, 4a, 4b, 5a, and 5b, the first linear array light source 300 is a blue coaxial array light source coaxial with the color linear array camera 200; the second linear array light source 400 is a red linear array light source.

The coaxial light source means that the light reflected by the object is on the same axis as the camera. The first linear light source 300 is a blue coaxial linear light source coaxial with the color linear camera 200, that is, the lens 201 of the color linear camera 200 and the first linear light source 300 are on the same axis. The first linear array light source 300 is provided as a coaxial array light source, has more uniform illumination compared to a conventional light source, and can prevent reflection of light from an object, thus improving accuracy and stability of machine vision. Coaxial array light sources are mainly used for detecting planar objects with a very high degree of reflection, such as glass. The coaxial array light source can highlight the surface unevenness of the object, overcomes the interference caused by surface reflection, and is mainly used for detecting bruise, scratch, crack and foreign matters on the flat and smooth surface of the object.

Considering the practical application scenario of the machine vision inspection device, such as a battery plate, since the battery plate is usually blue, the first linear light source 300 above the product S to be inspected is usually selected as a blue coaxial linear light source, so that the contrast between the inspection target and the background can be enhanced as shown in fig. 11. Because the first linear array light source 300 and the second linear array light source 400 are respectively arranged above and below the product S to be detected, the color linear array camera 200 is specifically applied to the image effect that only one image is shot to respectively extract the corresponding front blue light coaxial line array light source and the red light linear array backlight, so that the detection target is more highlighted, and the detection target and the background generate obvious contrast ratio, as shown in fig. 12. The gray-scale image of the blue channel processed by the industrial personal computer 700 is shown in fig. 11, and can be used for detecting foreign objects, surface defects, and the like. The gray level image of the red light channel processed by the industrial personal computer 700, as shown in fig. 12, can be used for detecting the distance L1 between the pole piece and the distance L2 between the bus bar and the edge of the pole piece assembly, but of course, the gray level image of the red light channel can also be used for detecting creepage distance, EVA film beyond edge, solder bar position deviation, solder bar beyond and the like, which are not listed one by one in the figure.

In addition, the red light source has longer wavelength, so the penetrating capacity is stronger, and the red linear array light source is arranged on the back surface of the detection surface, so the sufficient irradiation intensity can be provided, and the linear array light source positioned on the back surface of the detection surface can be arranged as red light. The red light has a longer wavelength but a low frequency, and the blue light has a high frequency, so that the intensity of the blue light source is greater, the brightness of the image can be increased, and thus the first line light source 300 irradiated to the detection surface can be set as blue light. The red light is mainly used for improving the contrast ratio of the measurement target and the detection target, so that the first linear array light source 300 and the second linear array light source 400 select two different colors of blue light and red light, and the respective advantages of the two lights can be combined, so that the quality of the acquired image is improved, and the accuracy and the stability of the measurement of machine vision are improved.

Of course, when the battery piece assembly is detected, the optimal detection effect can be obtained by adopting a scheme of blue-up and red-down. The first linear array light source 300 and the second linear array light source 400 can also select light with other colors according to different products to be detected.

In some embodiments, as shown in fig. 2, 4a and 4b, the transfer mechanism 500 includes a first mounting frame 103 and at least one roller 501, the main body frame 100 includes a first beam 101 and a second beam 102 disposed along a length direction of the machine vision inspection device, the first beam 101 and the second beam 102 are disposed in parallel and spaced apart along a conveying direction of the product S to be inspected, the first mounting frame 103 is mounted to the first beam 101 and the second beam 102, and the at least one roller 501 is mounted to the first mounting frame 103.

In the present embodiment, the drum 501 is erected on the first and second cross members 101 and 102 by the first mounting frame 103 and is located in the middle of the main body frame 100. In the process of rotating the roller 501 relative to the first mounting frame 103, the product S to be detected can be conveyed along the horizontal direction by means of friction between the roller 501 and the product S to be detected, and the roller is simple in structure and easy to realize.

In a specific embodiment, as shown in fig. 4a and 4b, the first mounting frame 103 is provided with two parallel and spaced rollers 501; a second light source bracket 402 is provided in the first mounting frame 103, and a second linear array light source 400 is mounted on the first mounting frame 103 at a spaced position between the two rollers 501. As shown in fig. 4a, the first mount 103 may be a cross-shaped plate-like structure including a second light source bracket 402 and two side wings 1031 in the middle. The second light source bracket 402 is provided with a light source mounting hole in which the second linear array light source 400 is mounted. The second connection terminal 401 of the second linear array light source 400 is electrically connected with the light source controller 600 through a cable. The two side wings 1031 are provided with roller mounting holes at positions close to the second light source bracket 402, respectively, and the two rollers 501 are mounted in the two roller mounting holes through mounting shafts, respectively.

As shown in fig. 4a and 4b, the conveying mechanism 500 includes two rollers 501 arranged in parallel, and the two rollers 501 are arranged to make the conveyance of the product S to be detected smoother. And the two rollers 501 are arranged at intervals, so that the second linear array light source 400 is conveniently arranged in the intervals, and the second linear array light source 400 can irradiate the back surface of the product S to be detected between the two rollers 501. The present utility model does not limit the number of the rollers 501.

As a possible embodiment, the main body frame 100 may also be separately provided with a bracket 109 under the first beam 101 and the second beam 102 for mounting the second linear array light source 400, as shown in fig. 9.

In some embodiments, as shown in fig. 1, 6, 8 and 9, the machine vision inspection device further includes a first conveyor 800 and a second conveyor 900 positioned outside the main body frame 100, the main body frame 100 includes a conveyor inlet 108 and a conveyor outlet 107 in communication with the conveyor mechanism 500, the first conveyor 800 is disposed on one side of the conveyor inlet 108, and the second conveyor 900 is disposed on one side of the conveyor outlet 107.

In the present embodiment, as shown in fig. 1 and 9, a first conveyor 800 is installed at a side of the conveying inlet 108 for conveying the product S to be inspected, and a second conveyor 900 is installed at a side of the conveying outlet 107 for receiving the product S to be inspected.

The product S to be detected is conveyed to the conveying inlet 108 by the first conveying device 800, passes through the conveying inlet 108 to the conveying mechanism 500, is conveyed to the conveying outlet 107 by the conveying mechanism 500, passes through the conveying outlet 107 to the second conveying device 900, and is conveyed out by the second conveying device 900.

In some embodiments, the photoelectric switch 202 is mounted on the first mounting frame 103, and the upper surface of the photoelectric switch 202 is lower than the upper surface of the drum 501, and the photoelectric switch 202 is used to generate a frame trigger signal of the color line camera 200 when the product S to be detected enters the main body frame 100.

In this embodiment, the photoelectric switch 202 is mounted on the first mounting frame 103, and the upper surface of the photoelectric switch 202 is lower than the upper surface of the roller 501, that is, the photoelectric switch 202 is located below the product S to be detected, when the product S to be detected enters the main body frame 100, the photoelectric switch 202 can be blocked, so that the photoelectric switch 202 generates a high-low level jump signal, which is used as a frame trigger signal of the color line camera 200, to control the color line camera 200 to start collecting images when the product S to be detected moves below the color line camera 200. The photoelectric switch 202 is adopted to control the working state of the color line camera 200, so that the working synchronization of the conveying mechanism 500 and the color line camera 200 can be realized, and the image acquisition work is convenient.

That is, the color line camera 200 performs image acquisition when the frame trigger signal and the line trigger signal are simultaneously active.

In some embodiments, as shown in fig. 1, 3-5 b, 8 and 9, the photoelectric encoder 204 is connected to the first mounting frame 103 through the second mounting frame 2041, so that the roller 2042 of the photoelectric encoder 204 contacts with the product S to be detected, and the product S to be detected can drive the roller 2042 to rotate during the conveying process; the photoelectric encoder 204 is used for contacting with the product S to be detected, and generating a line trigger signal of the color line camera 200 when the product S to be detected enters the main body frame 100.

In this embodiment, when the product S to be detected enters the main frame 100 of the machine vision detection device, the roller 2042 of the photoelectric encoder 204 is tightly attached to the product S to be detected, and the forward movement of the product S to be detected drives the encoder roller 2042 to rotate, so that the photoelectric encoder 204 generates a square wave pulse signal, and the square wave pulse signal is used as a line trigger signal of the color line camera 200 and is transmitted to the color line camera 200 through a cable or wireless transmission, so as to control the color line camera 200 to acquire images and synchronize with the movement state of the product S to be detected. The photoelectric encoder 204 of the roller 2042 can conveniently control the synchronization of the color line camera 200 and the motion state of the product S to be detected, and the volume of the machine vision detection device is not increased.

As one possible approach, the photoelectric encoder 204 may be an axial angle photoelectric encoder.

In some embodiments, as shown in fig. 3-5 b, the photoelectric switch 202 and the photoelectric encoder 204 are disposed on a side near the conveying inlet 108, and are sequentially arranged along the conveying direction of the product S to be detected.

In this embodiment, the photoelectric switch 202 is disposed closer to the transmission inlet 108 of the machine vision detection device, so that when the product S to be detected enters the machine vision detection device, the photoelectric switch 202 can control the color line camera 200 to start working, then the product S to be detected continues to be transmitted forward, and drives the photoelectric encoder 204 to start working, and the photoelectric encoder 204 sends a line triggering signal to the color line camera 200, so that the color line camera 200 starts scanning line by line, and image acquisition is performed.

As shown in fig. 4a, two side wings 1031 of the first mounting frame 103 are provided with mounting holes in a direction away from the drum 501 for connection with the first beam 101 and the second beam 102. Wherein the photoelectric switch 202 may be installed as a connection member in a mounting hole at one side of the transfer inlet 108 such that one side wing 1031 is connected to the first cross member 101. The other side of the wing 1031 may be connected to the second beam 102 by bolts. One end of the second mounting frame 2041 is connected to the underside of the side wing plate 1031 by a fixing block, and the other end is connected to the photoelectric encoder 204 by a rotating shaft and a connecting arm, so that the roller 2042 of the photoelectric encoder 204 is in contact with the product S to be detected.

In some embodiments, as shown in fig. 1, 2 and 7, the main body frame 100 further includes a third beam 104 and a fourth beam 105 disposed on the upper portions of the first beam 101 and the second beam 102, respectively, and a third mounting frame 106 is disposed on the third beam 104 and the fourth beam 105, and as shown in fig. 1 and 2, the third mounting frame 106 includes a camera bracket 205 and a first light source bracket 302; the color line camera 200 and the first line light source 300 are arranged on the third beam 104 and the fourth beam 105 with a spacing in a direction away from the product S to be inspected by the third mounting frame 106.

In the present embodiment, the third beam 104 and the fourth beam 105 are provided with the third mounting frame 106, and the color line camera 200 and the first line light source 300 are mounted on the third beam 104 and the fourth beam 105 in the height direction of the machine vision inspection device through the third mounting frame 106. As shown in fig. 5a and 5b, the third mounting frame 106 is a square frame, the color line camera 200 is mounted on the camera support 205 at the upper part of the square frame, and the first line light source 300 is mounted on the first light source support 302 at the bottom of the square frame, so that the color line camera 200 and the first line light source 300 are coaxially arranged. The third beam 104 and the fourth beam 105 are arranged along the height direction of the main body frame 100 with the first beam 101 and the second beam 102, so that the color line camera 200, the first line light source 300 and the second line light source 400 do not interfere with each other, and are convenient for the coaxial arrangement of the three, and the second line light source 400 is also coaxially arranged with the color line camera 200, so that the irradiation areas of the first line light source 300 and the second line light source 400 are basically completely overlapped, and the quality of the image acquired by the color line camera 200 is further improved.

In some embodiments, the machine vision inspection device further includes a switching power supply 203 disposed on a sidewall of the main body frame 100, the switching power supply 203 being configured to power the opto-electronic switch 202 and the opto-electronic encoder 204.

In this embodiment, as shown in fig. 1 to 8, the switching power supply 203 is disposed on a side wall of the main body frame 100, and the switching power supply 203 is disposed on a side wall of the main body frame 100, so that the installation space in the main body frame 100 can be fully utilized, and the distance between the switching power supply 203 and the photoelectric switch 202 and the photoelectric encoder 204 is shorter, which is beneficial to reducing the wiring length of electrical connection.

In some embodiments, the machine vision inspection apparatus further includes a light source controller 600 mounted on a side wall or a bottom wall of the main body frame 100, the light source controller 600 and the industrial personal computer 700 are arranged in parallel in a height direction or in a length direction, and the light source controller 600 is electrically connected to the first linear array light source 300 and the second linear array light source 400.

In this embodiment, by providing the light source controller 600 to control the switching and brightness of the first and second linear array light sources 300 and 400, as shown in fig. 7, the first connection terminal 301 of the first linear array light source 300 is electrically connected to the light source controller 600 through a cable, and the second connection terminal 401 of the second linear array light source 400 is electrically connected to the light source controller 600 through a cable. The first linear array light source 300 and the second linear array light source 400 share one light source controller, which can reduce the use of the light source controller 600 and reduce the occupation of the internal space of the main body frame 100.

As shown in fig. 1 to 8, the light source controller 600 is disposed on a side wall of the main body frame 100, the switching power supply 203, the light source controller 600 and the industrial personal computer 700 are sequentially disposed along a height direction, and as shown in fig. 9, the light source controller 600 is disposed on a bottom wall of the main body frame 100 and is disposed in parallel with the industrial personal computer 700 along a length direction of the machine vision detecting device. That is, the machine vision inspection apparatus shown in fig. 9 is different from the machine vision inspection apparatus shown in fig. 1 in that the installation positions of the switching power supply 203 and the light source controller 600 are different from each other in addition to the installation position of the second linear array light source 400.

In addition, the industrial personal computer 700 is electrically connected with the color line camera 200, for example, through cable electrical connection or through wireless transmission electrical connection, so that the color image collected by the color line camera 200 can be transmitted to the industrial personal computer 700, the industrial personal computer 700 can extract two gray images with different effects according to a first color channel and a second color channel from the color image output by the color line camera 200, and respectively perform size measurement and defect detection with different requirements on the two images, for example, perform foreign matter detection with the gray image obtained by the first color channel as shown in fig. 11, and perform pole piece distance L1 and detection of the edge distance L2 of the bus bar and the pole piece assembly with the gray image obtained by the second color channel as shown in fig. 12. Because the gray level images of the first color channel and the gray level images of the second color channel are different in respective emphasis points, more suitable gray level images can be selected in a targeted manner to detect related items, and therefore measurement accuracy and stability are greatly improved.

The machine vision detection device provided by the utility model can be used for performing vision detection, and the method can comprise the following steps:

step 1: when the device is turned on, the industrial personal computer 700 is turned on, the light source controller 600 supplies power to the first linear array light source 300, such as a blue coaxial linear array light source, and the second linear array light source 400, such as a red linear array light source, and vision software of the industrial personal computer 700 is turned on, and the vision software is communicated with the light source controller 600 through a serial port to control the on-off of the first linear array light source 300 and the second linear array light source 400.

Step 2: the first conveyor 800 conveys the products S to be inspected, such as the battery cell assembly, from the outside onto the conveyor mechanism 500 within the main body frame 100.

Step 3: the product S to be detected, such as a battery pack, shields the photoelectric switch 202, generates a level jump signal as a frame trigger signal, sends the frame trigger signal to the color line camera 200, and the color line camera 200 prepares to capture a frame image and waits for a line trigger signal.

Step 4: the product S to be detected, such as a battery piece assembly, moves forward to drive the roller 2042 of the photoelectric encoder 204 to rotate, the photoelectric encoder 204 generates continuous square wave pulse signals, the continuous square wave pulse signals are transmitted to the color line array camera 200 as line trigger signals of the color line array camera 200, and each time a line trigger signal is received, the color line array camera 200 collects a line of images until a set line number is reached, and the collection of a frame of images is completed, and the color line array camera 200 transmits the images to the industrial personal computer 700.

Step 5: the visual software in the industrial personal computer 700 processes the received color images, extracts two gray-scale images with different effects from one color image according to a first color channel such as a blue color channel and a second color channel such as a red color channel, and respectively performs size measurement and defect detection with different requirements on the two images.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims (11)

1. The machine vision detection device is characterized by comprising a main body frame (100), an industrial personal computer (700), a conveying mechanism (500), a first linear array light source (300), a second linear array light source (400), a color linear array camera (200), a photoelectric switch (202), a photoelectric encoder (204) and a light source controller (600), wherein the conveying mechanism (500) is arranged in the main body frame (100);

the conveying mechanism (500) is positioned between the first linear array light source (300) and the second linear array light source (400) in the main body frame (100) along the height direction of the machine vision detection device and is used for conveying products (S) to be detected;

the first linear array light source (300) is arranged at the upper part of the main body frame (100) through a first light source bracket (302) and is positioned at one side of the detection surface facing the product (S) to be detected; the second linear array light source (400) is arranged on one side of the detection surface facing away from the product (S) to be detected through a second light source bracket (402), and the areas irradiated by the first linear array light source (300) and the second linear array light source (400) are at least partially overlapped;

along the height direction of the machine vision detection device, the color line camera (200) is arranged above the first line light source (300) through a camera bracket (205), and the color line camera (200) acquires images of the detection surface of the product (S) to be detected at the overlapping part of the irradiation areas of the first line light source (300) and the second line light source (400);

the photoelectric switch (202) is electrically connected with the color line camera (200) and is used for generating a frame trigger signal of the color line camera (200) when the product (S) to be detected enters the main body frame (100);

the photoelectric encoder (204) is used for contacting with the product (S) to be detected, and generating a row trigger signal of the color line-scan camera (200) when the product (S) to be detected enters the main body frame (100);

the light source controller (600) is electrically connected with the first linear array light source (300) and the second linear array light source (400); and the industrial personal computer (700) is electrically connected with the color linear array camera (200).

2. The machine vision inspection device of claim 1, characterized in that the first linear light source (300) is a blue coaxial linear light source coaxial with the color linear camera (200); the second linear array light source (400) is a red linear array light source.

3. The machine vision inspection device of claim 1, characterized in that the transfer mechanism (500) comprises a first mounting frame (103) and at least one roller (501);

the main body frame (100) comprises a first cross beam (101) and a second cross beam (102) which are arranged along the length direction of the machine vision detection device, and the first cross beam (101) and the second cross beam (102) are arranged at intervals in parallel along the conveying direction of the products to be detected (S);

the first mounting frame (103) is mounted on the first beam (101) and the second beam (102), and at least one roller (501) is mounted on the first mounting frame (103).

4. A machine vision inspection apparatus as claimed in claim 3, characterized in that said first mounting frame (103) is fitted with two juxtaposed and spaced apart rollers (501); the second light source bracket (402) is arranged in the first mounting frame (103), and the second linear array light source (400) is arranged on the first mounting frame (103) and positioned at a spacing position between the two rollers (501).

5. A machine vision inspection device according to claim 3, characterized in that it further comprises a first conveyor (800) and a second conveyor (900) located outside the main body frame (100), the main body frame (100) comprising a conveyor inlet (108) and a conveyor outlet (107) communicating with the conveyor mechanism, the first conveyor (800) being arranged on the conveyor inlet (108) side and the second conveyor (900) being arranged on the conveyor outlet (107) side.

6. The machine vision inspection device of claim 5, characterized in that the photoelectric switch (202) is mounted to the first mounting frame (103) and an upper surface of the photoelectric switch (202) is lower than an upper surface of the drum (501).

7. The machine vision inspection device according to claim 6, characterized in that the photoelectric encoder (204) is connected to the first mounting frame (103) through the second mounting frame (2041) so that the roller (2042) of the photoelectric encoder (204) is in contact with the product (S) to be inspected, and the product (S) to be inspected can drive the roller (2042) to rotate during the conveying process.

8. The machine vision inspection device according to claim 7, characterized in that the photoelectric switch (202) and the photoelectric encoder (204) are disposed near a side where the product (S) to be inspected enters the machine vision inspection device, and are sequentially arranged along a conveying direction of the product (S) to be inspected.

9. The machine vision inspection device of any one of claims 3-8, wherein the main body frame (100) further includes third (104) and fourth (105) beams disposed above the first (101) and second (102) beams, respectively;

a third mounting frame (106) is arranged on the third cross beam (104) and the fourth cross beam (105), and the third mounting frame (106) comprises the camera bracket (205) and the first light source bracket (302); the color line camera (200) and the first line light source (300) are arranged on the third beam (104) and the fourth beam (105) at intervals along the direction away from the product (S) to be detected through the third mounting frame (106).

10. The machine vision inspection device of claim 9, further comprising a switching power supply (203) disposed on a side wall of the main body frame (100), the switching power supply (203) configured to power the opto-electronic switch (202) and the opto-electronic encoder (204).

11. The machine vision inspection device according to any one of claims 1-8, further comprising a light source controller (600) mounted to a side wall or a bottom wall of the main body frame (100), the light source controller (600) being juxtaposed in a height direction or a length direction with the industrial personal computer (700), the light source controller (600) being electrically connected with the first linear array light source (300) and the second linear array light source (400).