CN206891991U - Detection system - Google Patents

Abstract

A detection system for detecting a film comprises a line scan camera, a light source device, a shading unit and a carrying device. The light source device is correspondingly located below the line scan camera, and the light source device comprises a light emitting surface. The shading unit is arranged on the light emitting surface of the light source device, and the light beam of the light source device can only be emitted from the shading unit through the slit of the shading unit. The carrying device is located between the line scan camera and the light source device, and the carrying device can carry the film to be tested. The light beam emitted from the slit can pass through the film to be tested and enter the line scan camera. The lens size of the line scan camera is W, the aperture value used by the line scan camera is F, the vertical distance between the film to be tested and the light source device is L1, the vertical distance between the line scan camera and the film to be tested is L2, and the slit width is D. Then, when D≥L1/L2×W/F, the detection effect can be improved.

Description

Detection Systems

technical field

The utility model relates to a detection system, in particular to a detection system for detecting thin films.

Background technique

For manufacturers of various film applications, in order to effectively control the quality of products produced after film processing, various manufacturers will use various machines and equipment to test the film to avoid defects in the film that may cause post-processing product has a problem. Therefore, for manufacturers of various thin film applications, how to effectively detect defects on thin films is one of the most important issues.

Utility model content

The main purpose of the utility model is to provide a detection system to solve the problem that the existing film detection device cannot effectively detect the defects of the film.

In order to achieve the above object, the utility model provides a detection system, the detection system is used to detect a film to be tested, the detection system includes: a line scan camera; a light source device, correspondingly located below the line scan camera, the light source device includes a A light-emitting surface, the light-emitting surface is set facing the direction of the line scan camera; a light-shielding unit is arranged on the light-emitting surface of the light source device, the light-shielding unit includes a slit, and the light beam of the light source device can only be emitted out of the light-shielding unit through the slit; and A carrying device is located between the line-scanning camera and the light source device. The carrying device can carry the film to be measured; wherein, the light beam emitted from the slit can pass through the film to be measured and enter the line-scanning camera. Among them, the size of the lens of the line scan camera is defined as W, the aperture value used by the line scan camera is defined as F, the vertical distance between the film to be tested and the light source device is defined as L1, and the vertical distance between the line scan camera and the film to be tested is The distance is defined as L2, and the width of the slit is defined as D, then D≥L1/L2×W/F.

According to an embodiment of the present utility model, the shading unit is detachably and fixedly arranged on the light source device.

According to an embodiment of the present utility model, the shading unit includes two shading pieces, and the two shading pieces are detachably fixed on the light source device, and when the two shading pieces are fixed on the light source device, the two shading pieces correspond to the A slit is formed at the position of the surface.

According to an embodiment of the present invention, each shading member is located on a portion of the light-emitting surface and corresponds to the light-emitting surface of the shielding portion, and part of the light beam emitted from the light-emitting surface is shielded by the two shading members.

According to an embodiment of the present invention, the side walls of the two shades forming the slit are parallel to each other.

According to an embodiment of the present utility model, the shading unit is an opaque layer coated on the light-emitting surface.

According to an embodiment of the present utility model, the shading unit includes a shading portion and at least two fixing portions, the opposite sides of the shading portion are respectively connected to the two fixing portions, the shading portion has a slit, and when the shading unit is fixed to the light source device , the shielding part is correspondingly located on the light-emitting surface.

According to an embodiment of the present utility model, each fixing portion is detachably fixed on the light source device.

The utility model also provides a detection system. The detection system is used to detect a film to be tested. The detection system includes: a line scanning camera; a light source device correspondingly located below the line scanning camera. The surface is set facing the direction of the line scan camera; and a carrying device is located between the line scan camera and the light source device, and the carrying device can carry the film to be tested. Among them, the size of the lens of the line scan camera is defined as W, the aperture value used by the line scan camera is defined as F, the vertical distance between the film to be tested and the light source device is defined as L1, and the vertical distance between the line scan camera and the film to be tested is The distance is defined as L2, and the width of the light-emitting surface is defined as D, then D ≥ L1/L2×W/F.

According to an embodiment of the present utility model, the light emitting surface is rectangular.

The beneficial effect of the utility model can be that: the detection effect of the detection system can be effectively improved.

In order to further understand the features and technical contents of the present utility model, please refer to the following detailed description and accompanying drawings of the present utility model. However, the accompanying drawings are only for reference and illustration, and are not used to limit the present utility model.

Description of drawings

Fig. 1 is a schematic diagram of the detection system of the present invention.

FIG. 2 is a partially exploded schematic view of the light source device and the shading unit of the detection system of the present invention.

FIG. 3 is a combined schematic view of the light source device and the light shielding unit of the detection system of the present invention.

FIG. 4 is a schematic diagram of another embodiment of the light source device and the shading unit of the detection system of the present invention.

FIG. 5 is a schematic diagram of another embodiment of the light source device and the shading unit of the detection system of the present invention.

FIG. 6 is a grayscale image output by the detection system of the present invention.

FIG. 7 is a grayscale image output by the existing detection system under the same conditions as in FIG. 6 .

detailed description

Please refer to FIG. 1 to FIG. 3 together, which are schematic diagrams of the first embodiment of the detection system of the present invention. As shown in the figure, the detection system 1 includes a line scan camera 10 , a light source device 20 , a light shielding unit 30 and a carrying device 40 . The light source device 20 is correspondingly located below the line scan camera 10, and the light source device 20 includes a light exit surface 201, and the light exit surface 201 is arranged in a direction facing the line scan camera 10, that is to say, the light source device 20 can be formed from the light exit surface 201 emits a light beam as a light source for the line scan camera 10 to capture images. In practical applications, the light source device 20 may use a plurality of light emitting diodes as the source of light beams; the light source device 20 may be provided with related components such as a light guide plate and a diffusion sheet on the light-emitting surface 201, so that each position of the light-emitting surface 201 It has uniform light-emitting brightness; the appearance of the light source device 20 and the appearance of the light-emitting surface 201 can be changed according to requirements, and no limitation is imposed here.

The shading unit 30 may include two shading members 31, and the shape of each shading member 31 may be designed corresponding to the shape of the light source device 20. For example, in the figure of this embodiment, the light source device 20 is roughly in the shape of a cuboid. The two shades 31 may correspond to L-shaped components. The two shading members 31 are detachably fixed to the light source device 20; in practical applications, each shading member 31 can be fixed to the light source device 20 by using a plurality of locking members A (such as screws), but not limited thereto; In different applications, the light source device 20 and the two shading members 31 may have corresponding engaging structures, and the two shading members 31 can be detachably fixed to the light source device 20 through the engaging structures. . In different embodiments, each shading member 31 can also be in the shape of a flat plate, and each shading member 31 can be directly fixed to the periphery of the light-emitting surface 201 by using a plurality of locking members (such as screws), or directly fixed to the The light-emitting surface 201 . According to actual needs, the shading unit 30 can also be directly bonded or glued to the light source device 20, and is not limited to being detachably fixed to the light source device 20.

The two shading members 31 fixed on the light source device 20 respectively cover part of the light-emitting surface 201 of the light source device 20, and the two shading members 31 form a slit S at the position facing the light source device 20, so that the light emitted by the light source device 20 The light beam can only pass through the slit S and exit. Preferably, the opposite side walls of the two shading members 31 (corresponding to the two opposite side walls forming the slit S) are arranged parallel to each other, and the opposite side walls of each shading member 31 are parallel to the light source The longitudinal direction of the device 20 (that is, the longitudinal direction of the slit S in the figure); in other words, the two shading members 31 and the light source device 20 (the light-emitting surface 201) jointly form a cuboid container, which is the slit S. In this embodiment, when the user needs to use slits S of different widths, the width of the slit S formed between the two shading members 31 can be changed by only replacing one shading member 31 .

The carrying device 40 is disposed between the line scan camera 10 and the light source device 20. The carrying device 40 is used to carry the film F to be tested, and the carrying device 40 can move the film F to be tested to a specific direction at a predetermined speed. Part of the light beam emitted by the light source device 20 through the slit S can enter the line scan camera 10 through the film F to be tested. The line scan camera 10 and the light source device 20 can cooperate with the carrier device 40 to scan the film F to be tested, so as to detect whether the film F to be tested has defects (such as holes, oil stains, etc.).

As shown in FIG. 4 , in different embodiments, the light shielding unit 30 ′ may include a shielding portion 301 and at least two fixing portions 302 , and the opposite sides of the shielding portion 301 are respectively connected to the two fixing portions 302 , The shielding portion 301 has the aforementioned slit S, and when the light shielding unit 30 ′ is fixed on the light source device 20 , the shielding portion 301 can be correspondingly located above the light emitting surface 201 . Specifically, the shielding part 301 and the two fixing parts 302 can be integrally formed components, and the two fixing parts 302 can be detachably fixed on the light emitting surface through a plurality of locking pieces A (such as screws). 201 on the side walls on both sides. Different from the foregoing embodiments, relevant users can directly replace the entire light-shielding unit 30 according to the requirements of different widths of the slits S. Referring to FIG.

As shown in FIG. 5, in another embodiment, the light-shielding unit 30" may be an opaque layer coated on the light-emitting surface 201 (please refer to FIG. 2), and the area not covered by the opaque layer, That is to say, it is correspondingly formed as the slit S, so that the width of each section of the slit S can be more effectively controlled through the coating method. Of course, the material of the opaque layer must be a high temperature resistant material to avoid The qualitative change occurs under the continuous high-temperature irradiation of the light source device 20 .

As shown in Figure 1, the lens size of the line scan camera 10 is defined as W, the aperture value used by the line scan camera 10 is defined as F, the vertical distance between the film F to be measured and the light source device 20 is defined as L1, and the line scan camera 10 The vertical distance between the film F to be tested is defined as L2, and the width of the slit is defined as D, then in the case of D≥L1/L2×W/F, the line scan camera 10 can relatively correctly detect the film to be tested F's blemishes. The following is the actual application data:

More specifically, please refer to Fig. 6 and Fig. 7 together, Fig. 6 and Fig. 7 are detection system 1 of the present utility model and existing detection system respectively, in the film to be tested (herein the opaque film used in lithium battery) For example) when there are holes and oil stains (for example, machine oil, lubricating oil, etc. dripped from the relevant production machine), the grayscale map output after scanning by the line scan camera 10 (the vertical axis is represented by grayscale values, and the horizontal axis is represented as a virtual location).

As shown in the figure, when the detection system 1 of the present utility model and the existing detection system detect the position where the film F to be tested has a hole (that is, in Fig. 6 and Fig. 7, the peak pattern on the left), both A peak can be clearly shown in the grayscale image, and relevant inspectors can judge that there is a hole in the specific position of the film to be tested.

However, the existing detection system can only show roughly the same peak value as the hole in the grey-scale image at the position where the film F to be tested has oil stains; When testing the film, the relevant personnel cannot correctly judge whether the flaws on the film to be tested belong to oil stains or holes from the output grayscale image, and the relevant personnel must ensure the yield of the film to be tested. Regions showing peaks in the grayscale image are marked as defects. In actual implementation, some oil stains may gradually evaporate in the subsequent processing procedures. Therefore, it will happen that the relevant personnel who will reconfirm the defects in the follow-up will not find that the marked position is defective, so it may not be possible to confirm whether it is the detection system. Misjudgment.

As shown in Figure 6, when the detection system 1 of the present invention has holes and oil stains at the same time, it can clearly show different peaks in the gray scale image, that is, a relatively high peak in the figure ( The left peak pattern in the figure) corresponds to the position of the hole, while the relatively lower peak in the figure (the right peak pattern in the figure) corresponds to the position of the oil stain. In this way, the relevant personnel can correctly judge the actual state of the film F to be tested, thereby effectively solving the aforementioned related problems that the existing detection system cannot effectively show the difference between holes and oil stains in the grayscale image.

In particular, in a special embodiment, the detection system 1 of the present invention may also not include the aforementioned shading unit 30, and the width of the light-emitting surface 201 of the light source device 20 may be based on the aforementioned formula D≥L1/L2 ×W/F is designed. In other words, the foregoing embodiments change the width of the light-emitting surface of the light source device 20 through the shading unit 30 , and in other embodiments, it may also be based on the foregoing formula D≥L1/L2 when producing the light source device 20 The width of the slit S calculated by ×W/F is used to determine the width of the light-emitting surface. Preferably, the light-emitting surface is rectangular. In this way, relevant users can form the slit S without post-processing (that is, the aforementioned embodiment).

Claims (10)

1. A detection system, characterized in that, the detection system is used to detect a film to be tested, and the detection system comprises: line scan camera; A light source device, correspondingly located below the line scan camera, the light source device includes a light output surface, the light output surface is set facing the direction of the line scan camera; A shading unit, arranged on the light-emitting surface of the light source device, the shading unit includes a slit, and the light beam of the light source device can only exit the shading unit through the slit; and A carrying device, located between the line scan camera and the light source device, the carrying device can carry the film to be tested; wherein, the light beam emitted from the slit can pass through the film to be tested and enter the line scan camera; Wherein, the size of the lens of the line scan camera is defined as W, the aperture value used by the line scan camera is defined as F, the vertical distance between the film to be tested and the light source device is defined as L1, and the line scan camera and the line scan camera are defined as F. The vertical distance between the measuring films is defined as L2, and the width of the slit is defined as D, then D≥L1/L2×W/F. 2 . The detection system according to claim 1 , wherein the light shielding unit is detachably fixed on the light source device. 3 . 3. The detection system according to claim 2, wherein the shading unit includes two shading members, the two shading members are detachably fixed to the light source device, and when the two shading members are fixedly arranged In the light source device, the slits are formed at positions corresponding to the light-emitting surfaces of the two light-shielding members. 4. The detection system according to claim 3, wherein each of the light-shielding elements is located on the part of the light-emitting surface and corresponds to the light-emitting surface of the shielding part, and the partial light beam emitted from the light-emitting surface is covered by two light-shielding parts. covered by the item. 5 . The detection system according to claim 3 , wherein sidewalls of the two light-shielding members forming the slit are parallel to each other. 6 . The detection system according to claim 1 , wherein the light-shielding unit is an opaque layer coated on the light-emitting surface. 7. The detection system according to claim 1, wherein the light shielding unit comprises a shielding part and at least two fixing parts, the opposite sides of the shielding part are respectively connected to the two fixing parts, and the shielding part The part has the slit, and when the light-shielding unit is fixed on the light source device, the shielding part is correspondingly located on the light-emitting surface. 8. The detection system according to claim 7, wherein each of the fixing parts is detachably fixed on the light source device. 9. A detection system, characterized in that, the detection system is used to detect a film to be tested, and the detection system comprises: line scan camera; A light source device, correspondingly located below the line scan camera, the light source device includes a light output surface, the light output surface is set facing the direction of the line scan camera; and a carrying device, located between the line scan camera and the light source device, the carrying device is used to carry the film to be tested; Wherein, the lens size of the line scan camera is defined as W, the aperture value used by the line scan camera is defined as F, the vertical distance between the film to be tested and the light source device is defined as L1, and the line scan camera and the line scan camera are defined as F. The vertical distance between the films is defined as L2, and the width of the light-emitting surface is defined as D, then D≥L1/L2×W/F. 10. The detection system according to claim 9, wherein the light-emitting surface is rectangular.