On-line detection device for PSA (Pressure Swing Adsorption)

Abstract

The utility model discloses a PSA on-line detection device, which comprises a detector arranged on a production line, the detector comprises a camera, a polarizer, a polaroid and a light source, the camera, the polarizer, the polaroid and the light source are arranged in a matched mode, the polarizer is arranged right below the camera, the polarizer can shield a view field below the camera, and the light source is arranged below the camera. The polarizer is arranged on the surface of the light source and shields the side, facing the camera, of the light source, the polarizer and the polarizer are correspondingly arranged, the absorption axis of the polarizer and the absorption axis of the polarizer are orthogonally arranged, the defects in the prior art are overcome, and the detection device can effectively detect the defects of PSA.

Description

Technical Field

[0001] This utility model relates to the technical field of PSA detection devices, specifically to an online PSA detection device. Background Technology

[0002] A polarizer is an optical element that can change the polarization state of light and is widely used in liquid crystal displays, solar cells, optical instruments, and other fields. The quality of the polarizer directly affects the performance and stability of the product. Therefore, in the polarizer production line, it is necessary to monitor the appearance of the polarizer film in real time to avoid a large number of defective products and the waste of resources. However, traditional methods for inspecting the appearance quality of polarizer films mainly rely on manual visual inspection, which cannot meet the requirements of online production and inspection. In order to avoid the use of unqualified raw materials in the production process and the resulting product defects, it is necessary to inspect the raw materials used in the production process in real time. Among them, pressure-sensitive adhesive (PSA), as the adhesive used to laminate the release film onto the surface of the polarizer film, may have defects such as bubbles and streaks after being coated on the release film. This will cause the produced polarizer film to have these defects, thus leading to product defects. Utility Model Content

[0003] The purpose of this invention is to provide an online detection device for PSA, which overcomes the shortcomings of the prior art.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] An online inspection device for PSA includes a detector installed on a production line. The detector includes a camera, a polarizing filter, a polarizing plate, and a light source arranged in a coordinated manner. The polarizing filter is positioned directly below the camera and can block the field of view below the camera. The polarizing plate is positioned on the surface of the light source to block the light source from the side facing the camera. The polarizing filter and the polarizing plate are arranged correspondingly, and the absorption axis of the polarizing filter and the absorption axis of the polarizing plate are orthogonal.

[0006] The light source is mounted on a rotary motor.

[0007] The detectors are of several types and are arranged in at least two rows laterally. The detectors in adjacent rows are staggered longitudinally so that the staggered detectors can cover the width of the production line.

[0008] The camera's field of view is within the range of the light source.

[0009] Compared with the prior art, the implementation effects of this utility model are as follows:

[0010] The detector of this inspection device can detect PSA defects through the cooperation of a camera, polarizing filter, polarizer, and light source. Moreover, the rotating motor rotates the light source and the polarizer on it, which facilitates the adjustment of the angle between the absorption axis of the polarizer and the absorption axis of the polarizing filter. This makes the inspection device suitable for online inspection of PSA coated on release films of different specifications. In addition, the inspection device is arranged in at least two rows in an alternating manner, which can effectively detect PSA defects online. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the detector's structure;

[0012] Figure 2 This is a schematic diagram of the installation structure of the detection device.

[0013] Explanation of reference numerals in the attached diagram: 1. Camera; 2. Polarizing filter; 3. Light source; 4. Polarizing plate; 5. Rotary motor; 6. Sample to be tested. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figure 1-2As shown, the online detection device for PSA of this utility model includes several detectors set on the production line. The detectors are arranged in two horizontal rows on the production line, and the detectors in the adjacent rows are arranged in a staggered manner in the longitudinal direction, so that the staggered detectors can cover the width direction of the production line and realize continuous detection on the production line.

[0018] like Figure 1 As shown, the detector includes a camera 1, a polarizer 2, a polarizer 4, and a light source 3 arranged in a coordinated manner. The polarizer 2 is positioned directly below the camera 1, and it can block the field of view below the camera 1. The sample to be tested 6 (a release film coated with PSA) is placed between the polarizer 2 and the polarizer 4. The polarizer 4 is placed on the surface of the light source 3, and it can block the light source 3 from facing the camera 1. The rotary motor 5 can drive the light source 3 and the polarizer 4 to rotate. The polarizer 2 and the polarizer 4 are arranged correspondingly. By rotating the light source 3 and the polarizer 4 through the rotary motor 5, the absorption axis of the polarizer 2 and the absorption axis of the polarizer 4 are orthogonal. The field of view of the camera 1 is within the range of the light source 3, so that the camera 1 can effectively detect the sample to be tested 6 (a release film coated with PSA) within the field of view.

[0019] The orthogonal arrangement of the absorption axis of polarizer 2 and polarizer 4 prevents the light emitted from light source 3 from being captured by camera 1. When defects such as stripes, bubbles, or white spots exist in the PSA, the light propagating from polarizer 4 to polarizer 2 is affected by these defects, changing the direction of light propagation. This allows camera 1 to capture these defects, enabling PSA defect detection. Furthermore, due to the different alignment angles of release films produced by different manufacturers, the light passing through polarizer 4 changes direction when it passes through the release film. This prevents polarizer 2 from blocking the light passing through the release film, affecting PSA defect detection and making detection impossible. However, by rotating light source 3 and polarizer 4 using rotary motor 5, the angle between the absorption axis of polarizer 4 and polarizer 2 can be adjusted, compensating for the influence of the release film alignment angle. This prevents the light from passing through qualified sample 6 from passing through polarizer 2, thus enabling PSA defect detection. It should be noted that the camera 1 used in this application is a CCD camera. The CCD camera is connected to an external image processor. The image processor is able to distinguish and record the defects present in the PSA in the photos taken by the detector.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online detection device for PSA, characterized in that, The device includes a detector installed on the production line. The detector includes a camera, a polarizing filter, a polarizing plate, and a light source that are configured in conjunction with each other. The polarizing filter is positioned directly below the camera and can block the field of view below the camera. The polarizing plate is positioned on the surface of the light source to block the light source from the side facing the camera. The polarizing filter and the polarizing plate are configured correspondingly, and the absorption axis of the polarizing filter and the absorption axis of the polarizing plate are orthogonal.

2. The online detection device for PSA according to claim 1, characterized in that, The light source is mounted on a rotary motor.

3. An online PSA testing device according to claim 1 or 2, characterized in that, There are several detectors arranged in at least two rows laterally, with adjacent rows of detectors staggered longitudinally so that the staggered detectors can cover the width of the production line.

4. The online detection device for PSA according to claim 1, characterized in that, The camera's field of view is within the range of the light source.

Images