Measuring device for measuring thickness of glass cement layer

Abstract

The utility model belongs to the technical field of glass cement layer thickness detection, and particularly relates to a measuring device for measuring the thickness of a glass cement layer. A measuring device for measuring the thickness of a glass cement layer comprises a bottom plate, a test glass plate is arranged on the bottom plate, and a detection unit is arranged above the test glass plate; the laser emitter emits laser with the wavelength of 532 nm to the test glass plate, one path of laser is reflected to the beam splitter prism through glass, the other path of laser enters the glass and is refracted to the beam splitter prism, the beam splitter prism separates the two paths of reflected light and guides the two paths of reflected light to the double-quadrant photoelectric sensor, and the double-quadrant photoelectric sensor detects the light spot position difference of the two paths of reflected light; and the PLC is used for processing the signals of the sensor in real time, calculating the distance between the two light spots and reversely deducing the thickness of the coating.

Description

Technical Field

[0001] This utility model belongs to the field of glass adhesive layer thickness detection technology. Specifically, this utility model relates to a measuring device for measuring the thickness of glass adhesive layers. Background Technology

[0002] In recent years, advancements in modern technology have propelled the rapid development of intelligent mobile display products. Touchscreens, with their advantages of ease of operation, rapid response, and space-saving design, are widely used in tablets, mobile phones, automotive displays, and healthcare applications. Their structure, from top to bottom, comprises a protective screen, a touchscreen, and an LCD display. Optical transparent adhesives are used to bond the various transparent materials of a touchscreen. These adhesives reduce light scattering loss and improve display brightness and contrast. In daily use, properties such as yellowing and haze must be considered. Adhesive thickness directly affects the coating's lifespan. Current adhesive thickness gauges measure thickness by having a pressure bar contact the sample. This method is not only inaccurate due to the softness of the adhesive layer, but also creates pits in the direct contact of the pressure bar with the coating surface, resulting in an uneven adhesive surface that affects performance testing. Therefore, a device is needed that can measure adhesive layer thickness without affecting the adhesive's properties.

[0003] Chinese Patent (Publication No.: 219319262U) discloses a UV adhesive layer thickness measuring device, including a housing with an operating platform on its bottom front side; a workpiece fixing assembly, which includes a workpiece placement base plate and a pad, the workpiece placement base plate being fixed to the operating platform, a detection port being provided on the upper front side of the workpiece placement base plate, and the pad being fixed to the front side of the workpiece placement base plate for supporting the workpiece to be measured and serving as the zero-point test point of the workpiece; and a lifting drive thickness measuring assembly, which includes a thickness measuring component and a lifting drive assembly for driving the thickness measuring component to move up and down, the thickness measuring component being used to measure the distance between the test point of the workpiece to be measured and the zero point, and when the thickness measuring component moves downward and touches the adhesive surface of the workpiece to be measured, the thickness of the adhesive layer of the workpiece to be measured is measured. However, this device may affect the performance of the adhesive during measurement. Utility Model Content

[0004] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a measuring device for measuring the thickness of glass adhesive layers without affecting the properties of the adhesive.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a measuring device for measuring the thickness of a glass adhesive layer, comprising a base plate, a test glass plate disposed on the base plate, and a detection unit disposed above the test glass plate.

[0006] The detection unit includes a laser emitter, a beam splitter, a dual-quadrant photoelectric sensor, and a PLC controller. The laser emitter is positioned above the test glass plate. The laser emitter emits a laser beam, one of which is reflected by the glass to the beam splitter, and the other beam enters the glass and is refracted before reaching the beam splitter. The dual-quadrant photoelectric sensor and the laser emitter are connected to the PLC controller.

[0007] The base plate is provided with a test glass plate fixing unit, which includes a placement plate. The test glass plate is placed on the placement plate, and anti-slip silicone pads are provided at both ends of the placement plate.

[0008] A positioning plate is provided on one side of the base plate, and a limit plate is provided at one end of the base plate.

[0009] The bottom of the base plate is equipped with rubber feet.

[0010] The laser emitter is positioned at a 45-degree angle to the test glass plate.

[0011] The surface of the beam splitter is coated with an anti-reflection film with a wavelength of 532nm.

[0012] The surface of the base plate is matte treated.

[0013] The technical effect of this invention is as follows: The laser emitter emits a 532nm wavelength laser beam into the test glass plate. One laser beam is reflected by the glass to the beam splitter, and the other beam enters the glass and is refracted to the beam splitter. The beam splitter separates the two reflected beams and guides them to a dual-quadrant photoelectric sensor. The dual-quadrant photoelectric sensor detects the position difference of the two reflected beams and converts it into an electrical signal output to the PLC controller. The PLC controller processes the sensor signal in real time, calculates the distance between the two beams, and infers the coating thickness. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following:

[0015] Figure 1 This utility model discloses a structural diagram of a measuring device for measuring the thickness of glass adhesive layer, including a base plate, positioning plate, limiting plate, anti-slip silicone pad, and rubber foot pad.

[0016] Figure 2 This utility model relates to a measuring device detection unit and optical path propagation diagram for measuring the thickness of glass adhesive layers.

[0017] The following are marked in the diagram: 1. Base plate; 101. Positioning plate; 102. Limiting plate; 2. Test glass plate; 3. Detection unit; 301. Laser emitter; 302. Beam splitter; 303. Dual-quadrant photoelectric sensor; 304. PLC controller; 4. Test glass plate fixing unit; 401. Placement plate; 402. Anti-slip silicone pad; 403. Rubber foot pad. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0019] like Figures 1-2 As shown, a measuring device for measuring the thickness of a glass adhesive layer includes a base plate 1, a test glass plate 2 mounted on the base plate 1, and a detection unit 3 positioned above the test glass plate 2. The base plate 1 serves as the fundamental support structure for the entire measuring device, bearing and fixing other components, ensuring accurate relative positions between components, maintaining overall stability of the device, and providing a reliable platform for measurement. The base plate 1 provides a placement position for the test glass plate 2, with the adhesive layer located inside the test glass plate 2. The detection unit 3 is positioned above the test glass plate 2, and the thickness of the adhesive layer on the test glass plate 2 is measured through the detection unit 3.

[0020] The detection unit 3 includes a laser emitter 301, a beam splitter 302, a dual-quadrant photoelectric sensor 303, and a PLC controller 304. The laser emitter 301 is positioned above the test glass plate 2. The laser emitter 301 emits a laser beam, one of which is reflected by the glass to the beam splitter 302, and the other beam enters the glass and is refracted to the beam splitter 302. The dual-quadrant photoelectric sensor 303 and the laser emitter 301 are connected to the PLC controller 304.

[0021] The test procedure is as follows: the laser emitter 301 emits a 532nm wavelength laser beam into the test glass plate 2. One laser beam is reflected by the glass to the beam splitter 302, and the other beam enters the glass and is refracted to the beam splitter 302. The beam splitter 302 separates the two reflected beams and guides them to the dual-quadrant photoelectric sensor 303. The dual-quadrant photoelectric sensor 303 detects the position difference of the two reflected beams and converts it into an electrical signal output to the PLC controller 304. The PLC controller 304 processes the sensor signal in real time, calculates the distance between the two beams, and infers the coating thickness.

[0022] However, calibration is required before testing. This device also provides standard single-layer glass and hollow cavity standard blocks for calibration.

[0023] First, a standard single-layer glass (2.0mm thick single-layer glass is selected in this embodiment) is placed on the placement plate 401. The measurement process is run, the PLC calculates the distance between the two light spots and inversely calculates the coating thickness, comparing it with the standard value. If the error is > ±0.1mm, the compensation coefficient correction algorithm is input through the PLC.

[0024] Simultaneously, standard single-layer glass and hollow cavity standard blocks (e.g., 1mm glass + 0.5mm standard block + 1mm glass) can be combined. The hollow layer thickness can be measured, and the actual value can be compared with the measured value. The accuracy can be optimized by adjusting the linear coefficient of the light spot spacing versus thickness.

[0025] A test glass plate fixing unit 4 is provided on the base plate 1. The test glass plate fixing unit 4 includes a placement plate 401, on which the test glass plate 2 is placed. Anti-slip silicone pads 402 are provided at both ends of the placement plate 401. The placement plate 401 is set on the base plate 1. During testing, the test glass plate 2 is placed on the placement plate 401. The anti-slip silicone pads 402 are provided at both ends of the placement plate 401. When the test glass plate 2 is placed on the placement plate 401, the anti-slip silicone pads 402 provide friction to the test glass plate 2 while avoiding hard contact that could damage the surface of the test glass plate 2.

[0026] A positioning plate 101 is provided on one side of the base plate 1, and a limiting plate 102 is provided at one end of the base plate 1. The positioning plate 101 is vertically fixed to one side of the base plate to ensure that the edges of the test glass plate 2 are aligned and to prevent placement deviation. The limiting plate 102 restricts the sliding range of the test glass plate 2 on the base plate 1 to ensure that the measurement position is consistent each time.

[0027] The bottom of the base plate 1 is equipped with rubber feet 5. The rubber feet 5 can prevent slipping and dampen shocks, and isolate the influence of external vibrations on the measurement accuracy.

[0028] The laser emitter 301 is positioned at a 45-degree angle to the test glass plate 2. A 532nm wavelength laser is emitted towards the test glass plate 2 at a 45-degree angle. The 45-degree incident angle can separate the refracted light and the reflected light, ensuring that both optical signals are clear and measurable.

[0029] The surface of the beam splitter 302 is coated with an anti-reflection film with a wavelength of 532nm. The 532nm anti-reflection film on the surface of the beam splitter 302 reduces the reflection loss of laser light on the surface of the beam splitter 302 and improves the signal intensity.

[0030] The surface of base plate 1 is matte-finished. This is to prevent specular reflection from base plate 1 from interfering with the optical path and to ensure the purity of the laser signal.

[0031] The role and effect of the embodiments

[0032] Laser emitter 301 emits a 532nm wavelength laser beam toward test glass plate 2. One beam is reflected by the glass to beam splitter prism 302, and the other beam enters the glass and is refracted to beam splitter prism 302. Beam splitter prism 302 separates the two reflected beams and guides them to dual-quadrant photoelectric sensor 303. Dual-quadrant photoelectric sensor 303 detects the position difference of the two reflected beams and converts it into an electrical signal output to PLC controller 304. PLC controller 304 processes the sensor signal in real time, calculates the distance between the two beams, and infers the coating thickness.

[0033] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A measuring device for measuring the thickness of a glass adhesive layer, characterized in that, Includes a base plate (1), on which a test glass plate (2) is provided, and above the test glass plate (2) a detection unit (3) is provided. The detection unit (3) includes a laser emitter (301), a beam splitter (302), a dual-quadrant photoelectric sensor (303), and a PLC controller (304). The laser emitter (301) is positioned above the test glass plate (2). The laser emitter (301) emits a laser beam, one of which is reflected by the glass to the beam splitter (302), and the other beam enters the glass and is refracted to the beam splitter (302). The dual-quadrant photoelectric sensor (303) and the laser emitter (301) are connected to the PLC controller (304).

2. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: The base plate (1) is provided with a test glass plate fixing unit (4), the test glass plate fixing unit (4) includes a placement plate (401), the test glass plate (2) is placed on the placement plate (401), and anti-slip silicone pads (402) are provided at both ends of the placement plate (401).

3. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: A positioning plate (101) is provided on one side of the base plate (1), and a limiting plate (102) is provided at one end of the base plate (1).

4. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: The bottom of the base plate (1) is provided with rubber foot pads (5).

5. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: The laser emitter (301) is at a 45-degree angle to the test glass plate (2).

6. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: The surface of the beam splitter (302) is coated with an anti-reflection film with a wavelength of 532nm.

7. The measuring device for measuring the thickness of a glass adhesive layer according to claim 1, characterized in that: The surface of the base plate (1) is matte treated.

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