High-precision detection system based on spraying
By spraying high-temperature steam onto the surface to be inspected through a spray unit to form a fine and uniform thin film layer, the problem of detection accuracy caused by poor coating is solved, and high-precision and consistent detection results are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-04-07
AI Technical Summary
In existing technologies, coating processes cannot achieve uniform coverage, resulting in poor coating and affecting the detection effect. Furthermore, the uniformity of the detection liquid on the surface of the object to be detected affects the detection accuracy.
A spray unit sprays high-temperature steam onto the surface to be inspected. A heating rod rapidly vaporizes the liquid, forming a fine and uniform thin film layer. Combined with a visual inspection unit, this improves inspection accuracy and consistency.
It improves the detection accuracy of the surface to be inspected and the detection effect of minor defects, ensures the accuracy and consistency of steam emission, and adapts to the detection needs of different products to be inspected.
Smart Images
Figure CN224095735U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of defect detection technology, and in particular to a high-precision detection system based on spraying. Background Technology
[0002] For aesthetic reasons and to prevent dirt accumulation, glass covers for electronic devices such as mobile phones, watches, tablets, and computers are typically coated using processes like vacuum coating. However, in actual industrial production, uniform coverage is often impossible, leading to poor coating quality and inconsistent coating uniformity due to various limitations. Therefore, coating quality inspection is necessary. This inspection usually involves applying a test liquid, typically alcohol or water vapor, to the surface of the object being inspected, while simultaneously using the human eye or a camera to detect defects. The uniformity of the test liquid on the surface of the object directly affects the inspection results. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a high-precision detection system based on spraying. This high-precision detection system based on spraying improves the detection accuracy of the surface to be inspected and the detection effect of small defects. It can also ensure the accuracy and consistency of the steam emission amount, and improve the consistency of the detection of the surface of different products to be inspected.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-precision detection system based on spraying, comprising: a detection platform for placing the product to be inspected and a spraying unit set above the detection platform. The spraying unit for spraying onto the surface of the product to be inspected includes: a body vertically set above the detection platform; a spray guide groove is formed on the lower end face of the body; a feeding chamber is formed inside the body and above the spray guide groove; a partition layer is formed between the lower end of the feeding chamber and the spray guide groove, which is spaced apart from the spray guide groove; a plurality of through holes are spaced apart on this partition layer to connect the feeding chamber and the spray guide groove; the upper end of the feeding chamber is connected to the outlet end of a three-way connector; one inlet end of the three-way connector is connected to the outlet end of a screw valve through a pipeline; the other inlet end of the three-way connector is connected to an air supply unit through a pipeline; the inlet end of the screw valve is connected to a liquid supply unit through a pipeline; and a plurality of spaced heating rods are embedded and installed inside the body and outside the feeding chamber.
[0005] The following are further improvements to the above technical solution:
[0006] 1. In the above scheme, an atomizing nozzle connected to the spray guide groove is installed at the lower end of the body. The atomizing nozzle is used to spray onto the surface of the product to be inspected.
[0007] 2. In the above scheme, the detection platform is a mobile platform.
[0008] 3. The above solution also includes a vision inspection unit set above the inspection platform. The vision inspection unit, located behind the spraying unit in the direction of movement of the product to be inspected, is used to photograph the surface of the product to be inspected after spraying.
[0009] 4. In the above scheme, the product to be inspected is the display screen or glass cover of an electronic product.
[0010] 5. In the above scheme, a pressure regulating valve is installed on the pipeline connecting the gas supply unit and the tee joint.
[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0012] This invention relates to a high-precision spray detection system. The spray unit for spraying onto the surface of a product to be inspected includes: a body vertically positioned above a detection platform; a spray guide groove formed on the lower end face of the body; a feed chamber formed inside the body and above the spray guide groove; a partition layer formed between the lower end of the feed chamber and the spray guide groove, spaced apart from each other; several through holes spaced apart on this partition layer connecting the feed chamber and the spray guide groove; the upper end of the feed chamber connected to the outlet end of a three-way connector; one inlet end of the three-way connector connected to the outlet end of a screw valve via a pipeline; and the other inlet end of the three-way connector connected to an air supply unit via a pipeline. The feed end of the screw valve is connected to a liquid supply unit via a pipeline. Several spaced heating rods are embedded in the body of the screw valve and located on the outside of the feed chamber. The high temperature causes the liquid quantitatively fed into the feed chamber by the screw valve to vaporize rapidly. Then, the high-pressure gas entering the feed chamber propels the quantitatively vaporized steam outward from the spray guide channel to the surface of the product to be inspected. The hot steam carrying heat forms a fine and uniform thin film layer on the surface to be inspected when it cools down, thereby improving the detection accuracy of the surface to be inspected and the detection effect of small defects. It can also ensure the accuracy and consistency of the steam spray volume, and improve the consistency of the inspection of the surface of different products. Attached Figure Description
[0013] Appendix Figure 1 This is a schematic diagram of the overall structure of the high-precision detection system based on spray according to this utility model;
[0014] Appendix Figure 2 This is a schematic diagram of the spray unit in the high-precision spray detection system of this utility model;
[0015] Appendix Figure 3 This is a partial structural schematic diagram of the spray unit in the detection system of this utility model;
[0016] Appendix Figure 4 Appendix to this utility model Figure 3 A schematic cross-sectional view along the middle AA section;
[0017] Appendix Figure 5 Appendix to this utility model Figure 4 Enlarged view of point B in the middle;
[0018] Appendix Figure 6 Appendix to this utility model Figure 3 Enlarged view of point C in the middle;
[0019] Appendix Figure 7 This is a schematic diagram of the temperature sensor in the high-precision spray detection system of this utility model.
[0020] In the attached diagrams: 100, Product to be inspected; 200, Testing platform; 300, Spray unit; 1, Main body; 2, Spray guide channel; 3, Feed chamber; 4, Partition layer; 41, Through hole; 5, Heating rod; 6, T-connector; 8, Temperature sensor; 9, Atomizing nozzle; 10, Mounting slot; 11, Feed baffle; 111, Feed hole; 12, Press block; 121, Feed trough; 13, Screw valve; 131, Discharge end; 132, Feed end; 141, Air supply unit; 142, Liquid supply unit; 143, Pressure regulating valve. Detailed Implementation
[0021] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.
[0022] Example 1: A high-precision inspection system based on spraying, comprising: an inspection platform 200 for placing a product 100 to be inspected and a spraying unit 300 disposed above the inspection platform 200, wherein the spraying unit 300 for spraying onto the surface of the product 100 to be inspected comprises: a body 1 vertically disposed above the inspection platform 200. A spray guide groove 2 is provided on the lower end surface of the main body 1. A feeding chamber 3 is provided inside the main body 1 and above the spray guide groove 2. A partition layer 4 is formed between the lower end of the feeding chamber 3 and the spray guide groove 2, which are spaced apart from each other. A plurality of through holes 41 are provided on the partition layer 4 to connect the feeding chamber 3 and the spray guide groove 2. The upper end of the feeding chamber 3 is connected to the outlet end of a three-way connector 6. One inlet end of the three-way connector 6 is connected to the outlet end 131 of a screw valve 13 through a pipeline. The other inlet end of the three-way connector 6 is connected to an air supply unit 141 through a pipeline. The inlet end 132 of the screw valve 13 is connected to a liquid supply unit 142 through a pipeline. A plurality of spaced heating rods 5 are embedded and installed inside the main body 1 and outside the feeding chamber 3.
[0023] When in use, place the product to be inspected on the inspection platform. First, spray the surface of the product to be inspected through the spray unit. During the spraying process, when the area of the surface to be inspected is large, the spray unit can be moved or the inspection platform can be moved to make relative movement between the spray unit and the surface to be inspected, so as to achieve full-area spraying of the surface to be inspected.
[0024] The spray unit works in conjunction with a screw valve to quantitatively feed liquid (such as distilled water, ethanol, etc.) into the feed chamber of the spray unit. The feed chamber is maintained at a constant temperature (e.g., 200℃, which can be adjusted according to the physicochemical properties of the liquid entering the feed chamber) under the action of a heating rod. The liquid entering the feed chamber vaporizes under the action of high temperature.
[0025] The lower end of the aforementioned body 1 is equipped with an atomizing nozzle 9 that communicates with the spray guide groove 2. The atomizing nozzle 9 is used to spray onto the surface of the product 100 to be inspected.
[0026] The aforementioned testing platform 200 is a mobile platform.
[0027] The above also includes a visual inspection unit disposed above the inspection platform 200. The visual inspection unit, located behind the spray unit 300 in the direction of movement of the product to be inspected 100, is used to photograph the surface of the product to be inspected 100 after spraying.
[0028] The aforementioned product 100 to be inspected is a display screen of an electronic product. When inspecting the coating surface of the display screen, a spray valve is generally used to spray water or ethanol and other liquids. Defects are identified by observing the differences produced on the surface to be inspected.
[0029] A pressure regulating valve 143 is installed on the pipeline connecting the gas supply unit 141 and the three-way connector 6.
[0030] The aforementioned body 1 is a metal thermally conductive body.
[0031] A temperature sensor 8 is embedded in the aforementioned body 1.
[0032] Example 2: A high-precision inspection system based on spraying, comprising: an inspection platform 200 for placing a product 100 to be inspected and a spraying unit 300 disposed above the inspection platform 200, wherein the spraying unit 300 for spraying onto the surface of the product 100 to be inspected comprises: a body 1 vertically disposed above the inspection platform 200. A spray guide groove 2 is provided on the lower end surface of the main body 1. A feeding chamber 3 is provided inside the main body 1 and above the spray guide groove 2. A partition layer 4 is formed between the lower end of the feeding chamber 3 and the spray guide groove 2, which are spaced apart from each other. A plurality of through holes 41 are provided on the partition layer 4 to connect the feeding chamber 3 and the spray guide groove 2. The upper end of the feeding chamber 3 is connected to the outlet end of a three-way connector 6. One inlet end of the three-way connector 6 is connected to the outlet end 131 of a screw valve 13 through a pipeline. The other inlet end of the three-way connector 6 is connected to an air supply unit 141 through a pipeline. The inlet end 132 of the screw valve 13 is connected to a liquid supply unit 142 through a pipeline. A plurality of spaced heating rods 5 are embedded and installed inside the main body 1 and outside the feeding chamber 3.
[0033] The hot steam generated by vaporization, under the action of the gas entering the feed chamber through the three-way connector, is blown out of the spray unit through the spray guide groove and evenly scattered on the surface of the product to be inspected. The hot steam carrying heat forms a fine and uniform liquid particle film on the surface to be inspected when it cools down. The particle size of the liquid particles is much smaller than the spray particles of the spray valve, thereby improving the detection accuracy of the surface to be inspected and the detection effect of small defects. It can also ensure the accuracy and consistency of the steam spray volume, and improve the consistency of the inspection of the surface of different products to be inspected.
[0034] In the above process, the amount of liquid supplied to the feed chamber can be adjusted by adjusting the motor speed of the screw valve, thereby adjusting the final amount of steam sprayed to adapt to different detection environments and detection requirements; the amount of air injected into the feed chamber can also be adjusted by adjusting the pressure regulating valve, thereby adjusting the output rate of a certain amount of steam to match different spraying requirements.
[0035] The lower end of the aforementioned body 1 is equipped with an atomizing nozzle 9 that communicates with the spray guide groove 2. The atomizing nozzle 9 is used to spray onto the surface of the product 100 to be inspected.
[0036] The aforementioned product 100 to be inspected is a glass cover plate for electronic products. When inspecting the glass cover plate or the coated surface, water or ethanol is generally sprayed using a spray valve, and defects are identified by observing the differences produced on the surface to be inspected.
[0037] A pressure regulating valve 143 is installed on the pipeline connecting the gas supply unit 141 and the three-way connector 6.
[0038] The upper end face of the aforementioned body 1 has an installation groove 10 that communicates with the upper end of the feeding chamber 3, and a feeding baffle 11 embedded in the installation groove 10 is fixedly installed on the body 1 by a pressure block 12.
[0039] The feed baffle 11 has a feed hole 111 extending along its length. The pressure block 12 has a feed groove 121 that mates with the feed hole 111 on its lower surface facing the feed baffle 11. The feed groove 121 is connected to the outlet end of the tee connector 6 through a pipeline.
[0040] The length of the feed groove 121 is the same as the length of the feed hole 111, the width of the feed groove 121 is greater than the width of the feed hole 111, and the length of the feed hole 111 is the same as the width of the upper end of the feed chamber 3.
[0041] The working principle of this utility model is as follows:
[0042] When inspecting displays, glass covers, or some coated surfaces, liquids such as water or ethanol are generally sprayed using a spray valve. Defects are identified by observing the differences they produce on the surface to be inspected.
[0043] When in use, place the product to be inspected on the inspection platform. First, spray the surface of the product to be inspected through the spray unit. During the spraying process, when the area of the surface to be inspected is large, the spray unit can be moved or the inspection platform can be moved to make relative movement between the spray unit and the surface to be inspected, so as to achieve full-area spraying of the surface to be inspected.
[0044] Unlike conventional spray valves, the spray unit of this application is used in conjunction with a screw valve. The screw valve quantitatively feeds liquid (such as distilled water, ethanol, etc.) into the feed chamber of the spray unit. The feed chamber is kept at a constant temperature (e.g., 200°C, which can be adjusted according to the physicochemical properties of the liquid in the feed chamber) under the action of a heating rod. The liquid entering the feed chamber vaporizes under the action of high temperature.
[0045] Then, the vaporized hot steam, under the action of the gas entering the feed chamber through the three-way connector, is blown out of the spray unit through the spray guide groove and evenly scattered on the surface of the product to be inspected. The hot steam carrying heat forms a fine and uniform liquid particle film on the surface to be inspected when it cools down. The particle size of the liquid particles is much smaller than the spray particles of the spray valve, thereby improving the detection accuracy of the surface to be inspected and the detection effect of small defects. It can also ensure the accuracy and consistency of the steam spray volume, and improve the consistency of the inspection of the surface of different products to be inspected.
[0046] In the above process, the amount of liquid supplied to the feed chamber can be adjusted by adjusting the motor speed of the screw valve, thereby adjusting the final amount of steam sprayed to adapt to different detection environments and detection requirements; the amount of air injected into the feed chamber can also be adjusted by adjusting the pressure regulating valve, thereby adjusting the output rate of a certain amount of steam to match different spraying requirements.
[0047] When using the above-mentioned high-precision spray-based inspection system, the liquid quantitatively fed into the feed chamber by the screw valve is rapidly vaporized by high temperature. Then, the high-pressure gas entering the feed chamber sprays the quantitatively obtained vaporized steam outward from the spray guide channel to the surface of the product to be inspected. The hot steam carrying heat forms a fine and uniform thin film layer on the surface to be inspected when it cools down, thereby improving the inspection accuracy of the surface to be inspected and the detection effect of small defects. It can also ensure the accuracy and consistency of the steam spray volume, and improve the consistency of inspection of the surface of different products to be inspected.
[0048] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A high-precision detection system based on spray, comprising: A testing platform (200) for placing the product to be inspected (100) and a spray unit (300) disposed above the testing platform (200), the spray unit (300) for spraying onto the surface of the product to be inspected (100) includes: a body (1) vertically disposed above the testing platform (200), characterized in that: a spray guide groove (2) is formed on the lower end surface of the body (1), and a feed chamber (3) is formed inside the body (1) and above the spray guide groove (2), and a partition layer (4) is formed between the lower end of the feed chamber (3) and the spray guide groove (2) spaced apart from the spray guide groove (2). The plate (4) is provided with several through holes (41) that connect the feed chamber (3) and the spray guide channel (2). The upper end of the feed chamber (3) is connected to the outlet end of a three-way connector (6). One inlet end of the three-way connector (6) is connected to the outlet end (131) of a screw valve (13) through a pipeline. The other inlet end of the three-way connector (6) is connected to an air supply unit (141) through a pipeline. The feed end (132) of the screw valve (13) is connected to a liquid supply unit (142) through a pipeline. Several heating rods (5) are embedded and installed in the body (1) and located outside the feed chamber (3).
2. The high-precision detection system based on spray according to claim 1, characterized in that: The lower end of the body (1) is equipped with an atomizing nozzle (9) that communicates with the spray guide groove (2). The atomizing nozzle (9) is used to spray onto the surface of the product (100) to be inspected.
3. The high-precision detection system based on spray according to claim 1, characterized in that: The detection platform (200) is a mobile platform.
4. The high-precision detection system based on spray according to claim 3, characterized in that: It also includes a vision inspection unit located above the inspection platform (200), which is positioned behind the spray unit (300) in the direction of movement of the product to be inspected (100) and is used to photograph the surface of the product to be inspected (100) after spraying.
5. The high-precision detection system based on spray according to claim 1, characterized in that: The product to be inspected (100) is the display screen or glass cover of an electronic product.
6. The high-precision detection system based on spray according to claim 1, characterized in that: A pressure regulating valve (143) is installed on the pipeline connecting the gas supply unit (141) and the tee connector (6).