A clear and scratch-resistant smart bus stop sign

Abstract

The present invention belongs to the field of smart transportation technology and relates to a clear and scratch-resistant smart bus electronic signboard. The smart bus electronic signboard is fixed on a support frame, and the outer surface of the upper part of its protective film is tightly attached with a cotton wiper; the outer side of the cotton wiper is fixed with a steel clip, and the middle of the steel clip is connected to a retractable and liftable steel pipe; the steel pipe is connected to a lifting motor to achieve up and down movement; the steel pipe is connected to a rain collector with a filter at the bottom, and a water inlet section with a water hole is provided on the top; the horizontal position of the water inlet section corresponds to the upper part of the overflow port of the rain collector. Compared with the prior art, the present invention provides a cotton wiper on the surface of the outer protective film, and the surface of the protective film can be wiped regularly to keep it clean. More importantly, since the polymethyl methacrylate polymer is added with tridecafluorooctyl triethoxysilane in advance for calcination when preparing the protective film, the protective film has excellent scratch resistance, and due to the addition of A68 epoxy curing agent, the light transmittance is also significantly improved.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent transportation technology, and specifically relates to a clear and scratch-resistant intelligent bus electronic stop sign. Background Art

[0002] As cities continue to expand, the public transportation industry has rapidly developed, making commuting, travel, and tourism more convenient, and public transportation has become a primary transportation option for many citizens. Bus stop signs, which indicate bus routes, typically simply print, spray, or paste relevant boarding and stop information onto the sign. This makes it difficult to change information, and suffers from limited information and slow updates. With the accelerating pace of modern work and life, people's travel requirements are becoming increasingly demanding. The emergence of electronic bus stop signs has effectively addressed this issue by improving road utilization and allowing travelers to obtain timely bus arrival information and avoid blind waiting.

[0003] Existing electronic bus stop signs, when in use, are exposed to the elements for extended periods, causing a large amount of dust to accumulate on the display screen. This can hinder effective bus information access, leading to information delays and missed buses, disrupting travel. Furthermore, to protect the electronic bus stop signs, a protective film is often added. However, this film itself is also susceptible to dust, so people often touch it, causing it to be easily scratched, making it difficult to clearly display bus information for specific stops. Summary of the Invention

[0004] In response to the above problems, the present invention provides a clear and scratch-resistant smart bus electronic stop sign by adding a cleaning device and a special protective film.

[0005] The present invention discloses a clear and scratch-resistant intelligent electronic bus stop sign, comprising a display screen body and a protective film adhered to the display screen body; the protective film is prepared by: taking 5-15 parts by mass of tridecafluorooctyl triethoxysilane, 60-100 parts by mass of 0.1-0.5M hydrochloric acid solution, and then adding 30-70 parts by mass of polymethyl methacrylate polymer, reacting at 40-60°C in vacuum for 1-2 hours, and then reacting at 150-160°C for 2-8 hours, removing the solution from the obtained product, calcining the reaction at 700-800°C for 4-6 hours, and finally preparing composite microbeads with an average particle size of 10 μm; taking 12-18 parts by mass of composite microbeads, 40-5 parts by mass of butyrophenone, and preparing a composite microbead with an average particle size of 10 μm; 0 parts by mass, 20-25 parts by mass of toluene, 3-5 parts by mass of propylene glycol monomethyl ether, 4-8 parts by mass of polyurethane acrylate, 2-5 parts by mass of dipentaerythritol hexaacrylate, 0.5-1.5 parts by mass of benzoin methyl ether, 0.5-1.5 parts by mass of modified polysiloxane dispersant, 0.5-1.5 parts by mass of methyl phenylacetophenone, 0.5-1.5 parts by mass of dodecyldimethylethylammonium bromide, 10-15 parts by mass of polyacrylate polyol and 1-3 parts by mass of HDI trimer are used as film raw materials, the above film raw materials are mixed and stirred evenly, and then coated on an optical base material to form a thin film, dried with hot air, and cured with an ultraviolet lamp to obtain a protective film.

[0006] The clear and scratch-resistant smart bus electronic stop sign described in the present invention, the film raw material also includes 1-3 parts by mass of A68 epoxy curing agent.

[0007] The present invention relates to a clear and scratch-resistant smart bus electronic stop sign. The preparation method of the protective film is as follows: 8-10 parts by mass of tridecafluorooctyl triethoxysilane, 60-80 parts by mass of 0.3-0.5M hydrochloric acid solution, 50-70 parts by mass of polymethyl methacrylate polymer are added, and the mixture is vacuum reacted at 40-60°C for 1-2 hours, and then reacted at 150-160°C for 2-6 hours. After removing the solution from the obtained product, the mixture is calcined at 700-800°C for 4-6 hours, and finally granulated into composite microbeads with an average particle size of 10 μm; 12-18 parts by mass of composite microbeads, 40-50 parts by mass of butyrophenone, and 20-25 parts by mass of toluene are taken. The raw materials are mixed, stirred evenly, coated on an optical base material to form a thin film, dried with hot air, and cured with an ultraviolet lamp to obtain a protective film.

[0008] The present invention describes a clear and scratch-resistant smart bus electronic stop sign, which is fixed on a support frame, with a cotton wiper in close contact with the outer surface of the upper portion of its protective film; the outer side of the cotton wiper is fixed with a steel clip, and a retractable and liftable steel pipe is connected in the middle of the steel clip; the steel pipe is connected to a lifting motor to enable up and down movement; the steel pipe passes through a T-shaped rain collector with a filter screen on the top and a sealing ring on the bottom, and a water inlet section with a water hole is provided on the top of the T-shaped rain collector; the horizontal position of the water inlet section corresponds to the upper portion of the overflow outlet of the rain collector, ensuring that no water leaks under normal circumstances, but after moving down to the overflow outlet, water enters the water hole to achieve wet wiping.

[0009] Compared to existing technologies, the clear and scratch-resistant smart bus stop sign described in this invention features a cotton wiper on the outer protective film, which collects rainwater or dew over a wide area and allows for regular wiping of the surface, keeping it clean. More importantly, the protective film exhibits excellent scratch resistance, albeit with a decrease in light transmittance, due to the pre-calcination of polymethyl methacrylate polymer with tridecafluorooctyl triethoxysilane during its preparation. Furthermore, the addition of A68 epoxy curing agent significantly improves the light transmittance of the protective film, effectively compensating for the decrease in light transmittance caused by the improved scratch resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 : Schematic diagram of the structure of the clear and scratch-resistant smart bus electronic stop sign described in the present invention, and the partial diagram is a schematic diagram of the water connection of the cotton wipe. Implementation Method

[0011] The clear and scratch-resistant smart electronic bus stop sign of the present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto. Example

[0012] A clear and scratch-resistant smart bus stop sign is fixed on a support frame, and the upper outer surface of the protective film of the smart bus stop sign is tightly attached to a cotton wiper; the outer side of the cotton wiper is fixed with a steel clamp, and the middle of the steel clamp is connected to a retractable and liftable steel pipe; the steel pipe is connected to a lifting motor to achieve up and down movement; the steel pipe passes through a T-shaped rain collector with a filter screen on the top and a sealing ring on the bottom, and the top of the T-shaped rain collector is provided with a water inlet section with a water inlet hole; the horizontal position of the water inlet section corresponds to the upper part of the overflow outlet of the rain collector. The preparation method of the protective film is as follows: 9 parts by mass of tridecafluorooctyl triethoxysilane and 70 parts by mass of 0.4M hydrochloric acid solution are added, and 60 parts by mass of polymethyl methacrylate polymer are added, and the mixture is reacted at 50°C in vacuum for 2 hours, and then at 150°C for 6 hours. After removing the solution from the obtained product, the mixture is calcined at 750°C for 4 hours, and finally granulated into composite microbeads with an average particle size of 10 μm; 16 parts by mass of composite microbeads, 45 parts by mass of butyrophenone, 25 parts by mass of toluene, 4 parts by mass of propylene glycol monomethyl ether, and polymethyl methacrylate are added. 12 parts by mass of acrylate polyol P120, 6 parts by mass of polyurethane acrylate, 3 parts by mass of dipentaerythritol hexaacrylate, 2 parts by mass of HDI trimer, 1 part by mass of benzoin methyl ether, 1 part by mass of modified polysiloxane dispersant, 1 part by mass of methyl phenylacetophenone, 1 part by mass of dodecyldimethylethylammonium bromide, and 1 part by mass of A68 epoxy curing agent are mixed and stirred uniformly, and then coated on an optical base material to form a thin film, dried with hot air, and cured with a UV lamp to obtain a protective film. Example

[0013] A clear and scratch-resistant smart bus stop sign is fixed on a support frame, and the upper outer surface of the protective film of the smart bus stop sign is tightly attached to a cotton wiper; the outer side of the cotton wiper is fixed with a steel clamp, and the middle of the steel clamp is connected to a retractable and liftable steel pipe; the steel pipe is connected to a lifting motor to achieve up and down movement; the steel pipe passes through a T-shaped rain collector with a filter screen on the top and a sealing ring on the bottom, and the top of the T-shaped rain collector is provided with a water inlet section with a water inlet hole; the horizontal position of the water inlet section corresponds to the upper part of the overflow outlet of the rain collector. The preparation method of the protective film is as follows: 8 parts by mass of tridecafluorooctyl triethoxysilane and 60 parts by mass of 0.3M hydrochloric acid solution are added, and 50 parts by mass of polymethyl methacrylate polymer are added, and the mixture is reacted at 40°C in vacuum for 1 hour, and then at 150°C for 2 hours. After removing the solution from the obtained product, the mixture is calcined at 700°C for 4 hours, and finally granulated into composite microbeads with an average particle size of 10 μm; 12 parts by mass of the composite microbeads, 40 parts by mass of butyrophenone, 20 parts by mass of toluene, 3 parts by mass of propylene glycol monomethyl ether, and polyacrylate are taken. 10 parts by mass of polyol P120, 4 parts by mass of polyurethane acrylate, 2 parts by mass of dipentaerythritol hexaacrylate, 1 part by mass of HDI trimer, 0.5 parts by mass of benzoin methyl ether, 0.5 parts by mass of modified polysiloxane dispersant, 0.5 parts by mass of methyl phenylacetonate, 0.5 parts by mass of dodecyldimethylethylammonium bromide, and 3 parts by mass of A68 epoxy curing agent are mixed and stirred evenly, then coated on an optical base material to form a thin film, dried with hot air, and cured with a UV lamp to obtain a protective film. Example

[0014] A clear and scratch-resistant smart bus stop sign is fixed on a support frame, and the upper outer surface of the protective film of the smart bus stop sign is tightly attached to a cotton wiper; the outer side of the cotton wiper is fixed with a steel clamp, and the middle of the steel clamp is connected to a retractable and liftable steel pipe; the steel pipe is connected to a lifting motor to achieve up and down movement; the steel pipe passes through a T-shaped rain collector with a filter screen on the top and a sealing ring on the bottom, and the top of the T-shaped rain collector is provided with a water inlet section with a water inlet hole; the horizontal position of the water inlet section corresponds to the upper part of the overflow outlet of the rain collector. The preparation method of the protective film is as follows: 10 parts by mass of tridecafluorooctyl triethoxysilane and 80 parts by mass of 0.5M hydrochloric acid solution are added, and 70 parts by mass of polymethyl methacrylate polymer are added, and the mixture is reacted at 60°C in vacuum for 2 hours, and then at 160°C for 6 hours. After removing the solution from the obtained product, the mixture is calcined at 800°C for 6 hours, and finally granulated into composite microbeads with an average particle size of 10 μm; 12 parts by mass of composite microbeads, 50 parts by mass of butyrophenone, 25 parts by mass of toluene, 5 parts by mass of propylene glycol monomethyl ether, and polyacrylic acid are added. 10 parts by mass of ester polyol P120, 8 parts by mass of polyurethane acrylate, 5 parts by mass of dipentaerythritol hexaacrylate, 3 parts by mass of HDI trimer, 1.5 parts by mass of benzoin methyl ether, 1.5 parts by mass of modified polysiloxane dispersant, 1.5 parts by mass of methyl phenylacetophenone, 1.5 parts by mass of dodecyldimethylethylammonium bromide, and 1 part by mass of A68 epoxy curing agent are mixed and stirred evenly, then coated on an optical base material to form a thin film, dried with hot air, and cured with a UV lamp to obtain a protective film.

[0015] The protective film is prepared by mixing 16 parts by mass of composite polymethyl methacrylate microbeads, 45 parts by mass of butyrophenone, 25 parts by mass of toluene, 4 parts by mass of propylene glycol monomethyl ether, 12 parts by mass of polyacrylate polyol P120, 6 parts by mass of polyurethane acrylate, 3 parts by mass of dipentaerythritol hexaacrylate, 2 parts by mass of HDI trimer, 1 part by mass of benzoin methyl ether, 1 part by mass of modified polysiloxane dispersant, 1 part by mass of methyl phenylacetonate, 1 part by mass of dodecyldimethylethylammonium bromide, and 1 part by mass of A68 epoxy curing agent; stirring the raw materials uniformly; coating the mixture on an optical base material to form a thin film; drying the mixture with hot air; and curing the mixture with an ultraviolet lamp to obtain a protective film.

[0016] The protective film is prepared by: taking 9 parts by mass of tridecafluorooctyl triethoxysilane and 70 parts by mass of 0.4M hydrochloric acid solution, adding 60 parts by mass of polymethyl methacrylate polymer, reacting at 50°C in vacuum for 2 hours, and then reacting at 150°C for 6 hours, removing the solution from the obtained product, calcining at 750°C for 4 hours, and finally granulating into composite microbeads with an average particle size of 10 μm; taking 16 parts by mass of the composite microbeads, 45 parts by mass of butyrophenone, 25 parts by mass of toluene, 4 parts by mass of propylene glycol monomethyl ether, 6 parts by mass of polyurethane acrylate, 3 parts by mass of dipentaerythritol hexaacrylate, 1 part by mass of benzoin methyl ether, 1 part by mass of modified polysiloxane dispersant, 1 part by mass of methyl phenylacetonate, 1 part by mass of dodecyl dimethyl ethyl ammonium bromide, 12 parts by mass of polyacrylate polyol and 2 parts by mass of HDI trimer, mixing the above raw materials, stirring evenly, and then coating the obtained material on an optical base material to form a film, drying with hot air, and curing with an ultraviolet lamp to obtain a protective film.

[0017] (1) Scratch resistance test

[0018] Use steel wool #0000 to rub the protective film surface back and forth with a force of 500g and a constant rate of 100mm / s, and visually observe the surface condition. When the first noticeable scratch appears on the surface, record the number of rubs required to achieve this mark to characterize the scratch resistance. After wiping, shine fluorescent light from the back of the film with the light-diffusing surface facing upward, and visually observe the transmitted light to confirm the scratch resistance.

[0019] (2) Light transmittance

[0020] According to the ASTM-1003 standard, the light transmittance test was performed using a light transmittance haze meter.

[0021] The protective films of Examples 1-3 and Comparative Examples 1-2 with the same thickness were tested for scratch resistance and light transmittance. The results are shown in Table 1.

[0022] Table 1 Performance test results

[0023] Group Scratch resistance (times) Light transmittance (%) Example 1 410 89.8 Example 2 347 92.6 Example 3 389 91.3 Comparative Example 1 87 95.1 Comparative Example 2 321 79.4

Claims

1. A clear and scratch-resistant intelligent bus electronic sign, characterized by: The invention comprises a display screen body and a protective film attached to the display screen body; the preparation method of the protective film is as follows: 5-15 parts by mass of tridecafluorooctyl triethoxysilane and 60-100 parts by mass of 0.1-0.5M hydrochloric acid solution are added, and then 30-70 parts by mass of polymethyl methacrylate polymer are added, and the mixture is reacted at 40-60°C in vacuum for 1-2 hours, and then at 150-160°C for 2-8 hours, after removing the solution from the obtained product, calcining the mixture at 700-800°C for 4-6 hours, and finally preparing composite microbeads with an average particle size of 10 μm; 12-18 parts by mass of the composite microbeads, 40-50 parts by mass of butyrophenone, and 20-25 parts by mass of toluene are taken. The invention relates to a film raw material comprising: a first film, a second film, a first film, a second film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film. The first film is prepared by mixing a first film and a second film.

2. The clear and scratch-resistant smart bus stop electronic sign according to claim 1 is characterized in that: The film raw material further comprises 1-3 parts by mass of A68 epoxy curing agent.

3. The clear and scratch-resistant smart bus stop electronic sign according to claim 2 is characterized in that: The preparation method of the protective film is as follows: 8-10 parts by mass of tridecafluorooctyl triethoxysilane and 60-80 parts by mass of 0.3-0.5M hydrochloric acid solution are added, and then 50-70 parts by mass of polymethyl methacrylate polymer is added, and the mixture is reacted at 40-60°C in vacuum for 1-2 hours, and then at 150-160°C for 2-6 hours. After removing the solution from the obtained product, the mixture is calcined at 700-800°C for 4-6 hours to finally prepare composite microbeads with an average particle size of 10 μm; 12-18 parts by mass of the composite microbeads, 40-50 parts by mass of butyrophenone, 20-25 parts by mass of toluene, and 3-5 parts by mass of propylene glycol monomethyl ether are taken. The present invention relates to a film raw material comprising: a first catalyst, a second catalyst, a first catalyst and a second catalyst of the present invention; a first catalyst and a second catalyst of the present invention; a second catalyst and a second catalyst of the present invention; a first ...

4. The clear and scratch-resistant smart bus stop electronic sign according to claim 1 is characterized in that: The smart bus electronic stop sign is fixed on a support frame, and the upper outer surface of its protective film is tightly attached to a cotton wipe; the outer side of the cotton wipe is fixed with a steel clip, and a retractable and liftable steel pipe is connected in the middle of the steel clip; the steel pipe is connected to a lifting motor to achieve up and down movement; the steel pipe passes through a T-shaped rain collector with a filter screen on the top and a sealing ring on the bottom, and a water inlet section with a water inlet hole is provided on the top of the steel pipe; the horizontal position of the water inlet section corresponds to the upper part of the overflow outlet of the rain collector.

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