Aluminum layer thickness detection device for composite aluminum plated paper

Abstract

The utility model provides a kind of aluminium layer thickness detection device of composite aluminized paper, belong to composite aluminized paper detection technical field.The aluminium layer thickness detection device of composite aluminized paper includes measuring assembly.In the utility model, light conversion structure changes the light emitted by light source towards the sample to be detected into parallel light that can penetrate the sample to be detected, and the parallel light forms diffuse reflection light after penetrating the sample to be detected, and light intensity detection structure detects the intensity of the diffuse reflection light, so as to obtain the intensity of the diffuse reflection light corresponding to the sample to be detected, and the intensity of the diffuse reflection light corresponding to the standard sample is obtained by measuring assembly, and the thickness of the aluminium layer on the sample to be detected is calculated according to the intensity of the diffuse reflection light corresponding to the standard sample, the thickness of the aluminium layer of the standard sample and the intensity of the diffuse reflection light corresponding to the sample to be detected.

Description

Technical Field

[0001] This utility model relates to the field of composite aluminized paper detection technology, specifically to a device for detecting the aluminum layer thickness of composite aluminized paper. Background Technology

[0002] With the widespread application of metallized composite paper in the packaging industry, its excellent printing effect, light column effect, and positioning transfer paper properties have received high attention. The uniformity of the aluminum layer in metallized composite paper has a direct impact on the printing effect. Uneven aluminum layer thickness leads to unstable printing quality and affects the product qualification rate during the production process. Currently, most equipment on the market uses the resistance method to measure the aluminum layer thickness of metallized composite paper. The principle of this method is based on the conductivity of metallic aluminum; the thicker the aluminum layer, the lower the resistance. This method requires the aluminum layer to be in direct contact with the measuring probe, but most metallized composite papers are covered with a PET film on top of the aluminum layer, making it impossible to directly measure the thickness of the aluminum layer using the resistance method. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the prior art by proposing a device for detecting the aluminum layer thickness of composite aluminized paper.

[0004] This invention proposes a device for detecting the aluminum layer thickness of composite aluminized paper, comprising a measuring component. The measuring component includes a light source, a light conversion structure, and a light intensity detection structure. The light conversion structure and the light intensity detection structure are respectively disposed on both sides of the sample to be tested. The light source is used to emit light, the light conversion structure is used to convert the light emitted by the light source toward the sample to be tested into parallel light rays that can pass through the sample to be tested, and the light intensity detection structure is used to detect the intensity of the diffuse reflection light formed after the parallel light rays pass through the sample to be tested.

[0005] Furthermore, the light intensity detection structure is a light intensity sensor.

[0006] Furthermore, the light conversion structure is a convex lens.

[0007] Furthermore, the measuring component also includes a hollow light-shielding tube and a first opening at one end of the light-shielding tube. The light source and the convex lens are both disposed inside the light-shielding tube. The end of the light-shielding tube with the first opening abuts against one side of the sample to be tested, and the light intensity detection structure abuts against the other side of the sample to be tested.

[0008] Furthermore, the measuring component also includes a light-shielding mounting part disposed inside the light-shielding tube, and a mounting through hole disposed through the light-shielding mounting part and matching the convex lens. The light source is detachably connected to the inner wall of the light-shielding tube. The first opening and the light source are respectively disposed on both sides of the light-shielding mounting part, and the convex lens is detachably connected to the mounting through hole of the light-shielding mounting part, so that the convex lens converts the light emitted by the light source into parallel light that can pass through the sample to be tested.

[0009] Furthermore, the axis of the light source, the principal optical axis of the convex lens, and the axis of the light intensity detection structure coincide.

[0010] Furthermore, the principal optical axis of the convex lens, the axis of the light-shielding tube, and the axis of the first opening coincide.

[0011] Furthermore, the measuring components are multiple.

[0012] Furthermore, the multiple measuring components are arranged at equal intervals.

[0013] Furthermore, the light source is a visible light LED light source.

[0014] The aluminum layer thickness detection device for composite aluminized paper of this utility model has the following beneficial effects: The light conversion structure converts the light emitted by the light source toward the sample to be tested into parallel light rays that can pass through the sample. After passing through the sample, the parallel light rays form diffuse reflection light. The light intensity detection structure detects the intensity of the diffuse reflection light, thereby obtaining the intensity of the diffuse reflection light corresponding to the sample to be tested. The intensity of the diffuse reflection light corresponding to the standard sample is obtained through the measurement component. Based on the intensity of the diffuse reflection light corresponding to the standard sample, the thickness of the aluminum layer of the standard sample, and the intensity of the diffuse reflection light corresponding to the sample to be tested, the thickness of the aluminum layer at that location on the sample to be tested is calculated. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0016] Figure 1 This is a schematic diagram of the structure of a composite aluminized paper aluminum layer thickness detection device according to an embodiment of the present invention.

[0017] In the diagram: 1-Light source, 2-Convex lens, 3-Light intensity sensor, 4-Light shielding tube, 5-Sample to be tested. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0019] Please see Figure 1 This utility model discloses an aluminum layer thickness detection device for composite aluminized paper, comprising a measuring component, which includes a light source 1, a light conversion structure, and a light intensity detection structure. The light conversion structure and the light intensity detection structure are respectively disposed on both sides of the sample 5 to be tested. The light source 1 is used to emit light, the light conversion structure is used to convert the light emitted by the light source 1 toward the sample 5 to parallel light that can pass through the sample 5, and the light intensity detection structure is used to detect the intensity of the diffuse reflection light formed after the parallel light passes through the sample 5.

[0020] Here, both the sample to be tested (5) and the standard sample can be composite aluminized paper. In this application, the light conversion structure and light intensity detection structure of the measuring component are respectively positioned on both sides of the sample to be tested (5). Light source 1 emits light, and the light conversion structure converts the light emitted by light source 1 towards the sample to be tested (5) into parallel light. Part of the parallel light is absorbed by the paper, while the other part can pass through the sample to be tested (5) and form diffuse reflection light on one side of the sample. The light intensity detection structure detects the intensity of the diffuse reflection light. A standard sample is taken, and the aluminum layer thickness of the standard sample is measured. The light conversion structure and light intensity detection structure of the measuring component are respectively positioned on both sides of the standard sample. Light source 1 emits light, and the light conversion structure converts the light emitted by light source 1 towards the standard sample... The light emitted by the sample is converted into parallel light. Part of the parallel light is absorbed by the paper, while the other part can pass through the standard sample and form diffuse reflection light on one side of the standard sample. The light intensity detection structure detects the intensity of the diffuse reflection light, thereby obtaining the intensity of the diffuse reflection light corresponding to the standard sample. Based on multiple standard samples with aluminum layers of different thicknesses and the intensity of the diffuse reflection light corresponding to each standard sample, the correspondence between the aluminum layer thickness and the intensity of the diffuse reflection light can be obtained. Based on the correspondence between the aluminum layer thickness and the intensity of the diffuse reflection light, and the intensity of the diffuse reflection light corresponding to the sample to be tested, the aluminum layer thickness at the light-transmitting part of the sample to be tested can be calculated. This application indirectly measures the aluminum layer thickness of the composite metallized paper through light transmittance and measures and calculates the uniformity of the aluminum layer. This application can realize the detection of the aluminum layer thickness and the real-time detection of the aluminum layer uniformity of the composite metallized paper, providing a high-precision quality control method, thereby improving production efficiency and ensuring the printing quality of the final product.

[0021] The light intensity detection structure can be a light intensity sensor 3.

[0022] The light conversion structure can be a convex lens 2.

[0023] Specifically, this application measures the aluminum layer thickness of the composite metallized paper based on light transmittance and evaluates the uniformity of the aluminum layer. It has the following characteristics: 1. Measurement Principle: Light source 1 emits light, which is then converted into parallel light by convex lens 2. This parallel light strikes one side of the sample 5; part of it is absorbed by the paper, while the rest passes through the sample 5, forming diffuse reflection. A light intensity sensor 3 is placed against the other side of the sample 5 to measure the intensity of the diffuse reflection. Because the aluminum layer blocks the transmitted light, a thicker aluminum layer results in less transmitted light, and vice versa. Therefore, by measuring the change in diffuse reflection intensity, the thickness of the aluminum layer can be indirectly calculated.

[0024] 2. Measurement Components: Each measurement component consists of a visible light LED light source 1, a convex lens 2, and a light intensity sensor 3. The light emitted by the light source 1 is converted into parallel light rays by the convex lens 2 and illuminates the sample surface. The light intensity sensor 3 measures the intensity of the diffusely reflected light transmitted through the sample. The reading of the light intensity sensor 3 is inversely proportional to the thickness of the aluminum layer, and the thickness variation of the aluminum layer is calculated by software. Multiple measurement components form a matrix, covering the entire sample surface. The spacing and size of the measurement units are adjusted according to different paper sizes, printing requirements, and other practical needs.

[0025] 3. Measurement Procedure: When using the measurement components, first turn on light source 1 and calibrate the voltage of each measurement component using the readings of light intensity sensor 3, ensuring that the readings of all light intensity sensors 3 are normalized to the preset intensity. Next, place a piece of white paper without an aluminum layer as the background paper and record its reading. Then, replace it with the sample 5 to be tested and perform the measurement. Calculate the effect of the aluminum layer blocking light by using the difference between the readings and the background paper readings. Calibrate using a standard sample with a known aluminum layer thickness, and finally calculate the thickness value of the aluminum layer in the sample 5 to be tested. If only the uniformity of the aluminum layer needs to be evaluated, the uniformity of the aluminum layer can be evaluated by calculating the standard deviation of the readings of each measurement component.

[0026] 4. Software Control: This also includes control components for controlling the measurement components. These control components can perform the aforementioned measurement and data processing functions through programming software. The programming software will be responsible for operations such as data acquisition, calibration, aluminum layer thickness calculation, and uniformity evaluation, while also supporting interactive user interfaces for easier operation.

[0027] Specifically, this application, through this method of indirect transmittance measurement, can effectively overcome the problem that the resistance method in the prior art cannot directly contact the aluminum layer, providing higher measurement accuracy and equipment reliability, and meeting the actual needs of composite paper aluminum layer thickness uniformity detection.

[0028] The measuring component may also include a light-shielding tube 4 with a hollow interior, a first opening at one end of the light-shielding tube 4, a light source 1 and a convex lens 2 both located inside the light-shielding tube 4, the end of the light-shielding tube 4 with the first opening abutting against one side of the sample 5 to be tested, and a light intensity detection structure abutting against the other side of the sample 5 to be tested.

[0029] The measuring assembly may also include a light-shielding mounting part disposed inside the light-shielding cylinder 4, a mounting through hole disposed through the light-shielding mounting part and matching the convex lens 2, and a light source 1 detachably connected to the inner wall of the light-shielding cylinder 4; the first opening and the light source 1 are respectively disposed on both sides of the light-shielding mounting part, and the convex lens 2 is detachably connected to the mounting through hole of the light-shielding mounting part, so that the convex lens 2 converts the light emitted by the light source 1 into parallel light that can pass through the sample 5 to be tested.

[0030] Specifically, the light-shielding cylinder 4 may include a light-shielding cover and a hollow light-shielding body. A first opening is located at one end of the light-shielding body, and a second opening extends through the other end of the light-shielding body. The light-shielding cover is detachably connected to the second opening of the light-shielding body to seal the second opening. The light-shielding body may be a cylinder. The light source 1 is detachably connected to the inner wall of the light-shielding cover.

[0031] The axis of light source 1, the principal optical axis of convex lens 2, and the axis of light intensity detection structure can coincide.

[0032] The principal optical axis of the convex lens 2, the axis of the light-shielding tube 4, and the axis of the first opening can coincide.

[0033] There can be multiple measurement components.

[0034] Multiple measurement components can be set at equal intervals.

[0035] Specifically, the intensity of diffuse reflected light at different locations on the sample 5 under test is acquired using multiple measuring components. The thickness of the aluminum layer at these different locations is then calculated, and the standard deviation of the aluminum layer thickness at each location is calculated. The uniformity of the aluminum layer on the sample 5 under test is then evaluated based on the standard deviation. Multiple measuring components are arranged in a matrix along both the transverse and longitudinal directions.

[0036] Light source 1 can be a visible light LED light source 1.

[0037] Specifically, this application indirectly measures the aluminum layer thickness of the composite metallized paper by measuring light transmittance, overcoming the problem of the resistance method's inability to directly contact the aluminum layer and avoiding the defect of being unable to measure due to PET film coverage. This application can provide high-precision aluminum layer thickness data, and by calculating the standard deviation value of each measurement point, it can effectively evaluate the uniformity of the aluminum layer of the composite metallized paper, meeting the high-precision testing requirements of modern production. Using this equipment, the uniformity of the aluminum layer of the composite paper can be monitored in real time, ensuring stable product quality, reducing the generation of defective products, and improving production efficiency.

[0038] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.

[0039] It should be noted that in the description of this application, the terms "upper end," "lower end," and "bottom end," indicating orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise limited, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting the aluminum layer thickness of composite aluminized paper, characterized in that: The measurement component includes a light source (1), a light conversion structure, and a light intensity detection structure. The light conversion structure and the light intensity detection structure are respectively disposed on both sides of the sample to be tested (5). The light source (1) is used to emit light. The light conversion structure is used to convert the light emitted by the light source (1) toward the sample to be tested (5) into parallel light that can pass through the sample to be tested (5). The light intensity detection structure is used to detect the intensity of the diffuse reflection light formed after the parallel light passes through the sample to be tested (5).

2. The aluminum layer thickness detection device for composite aluminized paper as described in claim 1, characterized in that: The light intensity detection structure is a light intensity sensor (3).

3. The aluminum layer thickness detection device for composite aluminized paper as described in claim 1 or 2, characterized in that: The light conversion structure is a convex lens (2).

4. The aluminum layer thickness detection device for composite aluminized paper as described in claim 3, characterized in that: The measuring component also includes a light-shielding tube (4) with a hollow interior and a first opening at one end of the light-shielding tube (4). The light source (1) and the convex lens (2) are both located inside the light-shielding tube (4). The end of the light-shielding tube (4) with the first opening abuts against one side of the sample to be tested (5), and the light intensity detection structure abuts against the other side of the sample to be tested (5).

5. The aluminum layer thickness detection device for composite aluminized paper as described in claim 4, characterized in that: The measuring component also includes a light-shielding mounting part disposed inside the light-shielding tube (4) and a mounting through hole disposed through the light-shielding mounting part and matching the convex lens (2). The light source (1) is detachably connected to the inner wall of the light-shielding tube (4). The first opening and the light source (1) are respectively disposed on both sides of the light-shielding mounting part. The convex lens (2) is detachably connected to the mounting through hole of the light-shielding mounting part, so that the convex lens (2) converts the light emitted by the light source (1) into parallel light that can pass through the sample (5) to be tested.

6. The aluminum layer thickness detection device for composite aluminized paper as described in claim 5, characterized in that: The axis of the light source (1), the principal optical axis of the convex lens (2), and the axis of the light intensity detection structure coincide.

7. The aluminum layer thickness detection device for composite aluminized paper as described in claim 6, characterized in that: The principal optical axis of the convex lens (2), the axis of the light-shielding tube (4), and the axis of the first opening coincide.

8. The aluminum layer thickness detection device for composite aluminized paper as described in claim 1 or 2, characterized in that: The measurement components are multiple.

9. The aluminum layer thickness detection device for composite aluminized paper as described in claim 8, characterized in that: The multiple measuring components are arranged at equal intervals.

10. The aluminum layer thickness detection device for composite aluminized paper as described in claim 1 or 2, characterized in that: The light source (1) is a visible light LED light source (1).

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