Air-shielded camera housing for blocking particles

Abstract

The present invention relates to an air-shielded camera housing for blocking particles and, more particularly, to an air-shielded camera housing for preventing contamination of a camera lens by particles (dust and floating matter) in a factory environment, wherein pressurized air is introduced from an air compressor to form an air shielding layer on the front surface of the lens, and a whirlwind layer in which the pressurized air advances outward in a whirlwind form is implemented, thereby fundamentally blocking particles from approaching the lens. According to the present invention, the air shielding layer is formed on the front surface of the lens, and the whirlwind layer is implemented, thereby providing an effect of fundamentally blocking the penetration of particles.

Description

Air-shielded camera housing for particle blocking

[0001] The present invention relates to an air-shielding camera housing for blocking particles, and more specifically, to an air-shielding camera housing for preventing particle (dust and suspended matter) contamination of a camera lens in a factory environment. The present invention relates to an air-shielding camera housing for blocking particles characterized by fundamentally blocking particles from approaching the lens by introducing pressurized air from an air compressor to form an air-shielding layer on the front surface of the lens and implementing a vortex layer in which the pressurized air moves outward in a vortex form.

[0002] Generally, during the process of acquiring camera images, the image naturally becomes blurry due to dust, debris, and other particles adhering to the front of the lens.

[0003] At this time, there is the inconvenience of having to clean the lens with a lens cleaner. While camera lenses installed at a low position on the ground can be cleaned in this way, camera lenses installed at a high ceiling cannot be cleaned frequently, and it is difficult to work on them due to their high position.

[0004] To explain in more detail, it is as follows.

[0005] First, there are difficulties in maintenance due to the installation location of the camera.

[0006] In other words, for cameras at heights of 3m or more, cameras installed on cranes or high ceilings at industrial sites, and cameras installed on special structures such as bridges or tunnels, access is very limited, making maintenance difficult.

[0007] Second, maintenance costs were excessive.

[0008] In other words, the cost of renting an aerial work platform once is over 500,000 won, and labor costs per operation are over 300,000 won based on a team of two. On top of this, additional costs are incurred for safety equipment and traffic control personnel and equipment required for road operations.

[0009] Third, there were serious safety issues.

[0010] In other words, there was always a risk of falling during work at height, work was restricted during bad weather making immediate maintenance impossible, and there was a high possibility of secondary accidents when working in hazardous areas.

[0011] Fourth, existing dustproof structures showed technical limitations.

[0012] In other words, physical barriers could not effectively block fine dust such as PM2.5 and PM10, and if a filter method was used, the filter had to be replaced every month.

[0013] In addition, problems arose regarding limited field of view due to the cover structure and lens contamination caused by rainwater splashing during rainy weather.

[0014] Fifth, operational problems occurred.

[0015] In other words, regular inspections were required at least once a month, and camera shutdowns of an average of 2 to 3 hours were unavoidable during cleaning work.

[0016] For example, work quality deteriorates at night due to low light conditions, and inspection cycles increase further during periods of severe yellow dust or fine dust.

[0017] Sixth, the problem of image quality degradation was serious.

[0018] In other words, due to the accumulation of fine dust, image clarity decreased by 20 to 30 percent, and during night shooting, image quality deteriorated due to scattered light. Additionally, lens contamination was exacerbated by moisture and condensation, and there was a possibility that the lens surface would corrode if left unattended for a long period.

[0019] In particular, in factory environments, cameras must continuously monitor work conditions, but contaminants accumulate on the front of the lens due to particles (dust, iron filings, etc.) in the internal air.

[0020] This resulted in reduced image clarity and required periodic lens cleaning, causing problems with high costs and time for maintenance.

[0021] Therefore, in order to solve the aforementioned problems, the air-shielded camera housing for particle blocking according to the present invention is proposed.

[0022] [Prior Art Literature]

[0023] [Patent Literature]

[0024] (Patent Document 1) (Prior Art 1) Korean Registered Patent Publication No. 10-1914461

[0025] Therefore, the present invention has been devised to resolve the aforementioned conventional problems,

[0026] The objective of the present invention is to provide an air-shielding camera housing that effectively prevents particle contamination of a camera lens in a factory environment, forms an air-shielding layer on the front surface of the lens, and implements a swirling layer to fundamentally block the access of particles.

[0027] In order to achieve the problem that the present invention aims to solve,

[0028] An air-shielded camera housing for particle blocking according to one embodiment of the present invention is,

[0029] It is characterized by forming an air shielding layer (400) on the front surface of the lens filter (110).

[0030] In addition, it is characterized by further including an air inlet (200) that draws in pressurized air from an air compressor (210).

[0031] In addition, the above pressurized air is characterized by passing through an oil and moisture removal filter. An air-shielded camera housing for particle blocking.

[0032] In addition, it is characterized by forming an air passage between the lens filter case (100) and the front case (300).

[0033] In addition, the lens filter case (100) is formed to be longer than the front case (300), has a tapered angle (T), and is characterized by forming a vortex layer in which pressurized air moves outward in a vortex shape.

[0034] Meanwhile, according to another embodiment, an air-shielded camera housing for particle blocking is,

[0035] Camera body (500);

[0036] Lens filter case (100);

[0037] An air inlet (200) that draws in pressurized air through an air compressor (210) and a filter;

[0038] Air passage between the front case (300) and the lens filter case (100);

[0039] Air outlet;

[0040] An air shielding layer (400) formed on the front surface of a lens filter (110); and

[0041] It includes a vortex layer in which pressurized air moves outward in a vortex shape, and

[0042] The lens filter case (100) is formed to be longer than the front case (300) and is characterized by having a tapered angle (T).

[0043] Through the above configuration, the problem of the present invention is solved.

[0044] The air-shielded camera housing for particle blocking according to the present invention provides the following remarkable effects.

[0045] First, by forming an air shielding layer on the front of the lens and implementing a vortex layer, it provides the effect of fundamentally blocking the penetration of particles.

[0046] Second, it significantly reduces the need for periodic lens cleaning, providing the effect of saving maintenance costs and time.

[0047] Third, it provides the effect of maintaining consistently clear image quality even in a factory environment.

[0048] Fourth, the particle blocking effect is maximized through the step difference and taper angle.

[0049] FIG. 1 is an overall configuration diagram of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0050] FIG. 2 is a graph showing the results of a durability test for a lens filter case or a front case of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0051] Figure 3 is a graph showing the efficiency according to the input pressure of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0052] Figure 4 is a graph comparing the pressure efficiency by angle of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0053] FIG. 5 is a graph showing the long-term stability of the air shielding layer of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0054] FIG. 6 is a graph showing the pressure distribution by lens surface position of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0055] FIGS. 7 to 14 are experimental example diagrams showing the pressure change by angle of the front case (300) of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0056] FIGS. 15 to 16 are exemplary diagrams of the configuration of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0057] The following description merely illustrates the principles of the present invention. Therefore, those skilled in the art may invent various devices that embody the principles of the present invention and are included within the concept and scope of the present invention, even though they are not explicitly described or illustrated in this specification.

[0058] Furthermore, all conditional terms and embodiments listed in this specification are, in principle, explicitly intended only for the purpose of enabling an understanding of the concept of the invention and should be understood not as being limited to the embodiments and conditions specifically listed as such.

[0059] An air-shielded camera housing for particle blocking according to one embodiment of the present invention is,

[0060] It is characterized by forming an air shielding layer (400) on the front surface of the lens filter (110).

[0061] At this time, it is characterized by further including an air inlet (200) that draws in pressurized air from an air compressor (210).

[0062] At this time, the pressurized air is characterized by passing through an oil and moisture removal filter.

[0063] At this time, the air passage is formed between the lens filter case (100) and the front case (300).

[0064] At this time, the lens filter case (100) is formed longer than the front case (300), has a tapered angle (T), and is characterized by forming a vortex layer in which pressurized air moves outward in a vortex shape.

[0065] Meanwhile, according to another embodiment, an air-shielded camera housing for particle blocking is,

[0066] Camera body (500);

[0067] Lens filter case (100);

[0068] An air inlet (200) that draws in pressurized air through an air compressor (210) and a filter;

[0069] Air passage between the front case (300) and the lens filter case (100);

[0070] Air outlet (700);

[0071] An air shielding layer (400) formed on the front surface of a lens filter (110); and

[0072] It includes a vortex layer in which pressurized air moves outward in a vortex shape, and

[0073] The lens filter case (100) is formed to be longer than the front case (300) and is characterized by having a tapered angle (T).

[0074] Hereinafter, an example of an air-shielded camera housing for particle blocking according to the present invention will be described in detail.

[0075] FIG. 1 is an overall configuration diagram of an air-shielded camera housing for particle blocking according to an embodiment of the present invention.

[0076] As illustrated in FIG. 1, an air-shielded camera housing for particle blocking according to one embodiment of the present invention is,

[0077] It is characterized by forming an air shielding layer (400) on the front surface of the lens filter (110),

[0078] It is characterized by including an air inlet (200) that draws in pressurized air from an air compressor (210).

[0079] At this time, the pressurized air is characterized by passing through an oil and moisture removal filter.

[0080] In addition, it is characterized by forming an air passage between the lens filter case (100) and the front case (300).

[0081] In addition, the lens filter case (100) is formed to be longer than the front case (300), has a tapered angle (T), and is characterized by forming a vortex layer in which pressurized air moves outward in a vortex shape.

[0082] With the above configuration, when pressurized air is injected through the air inlet (200), an air shielding layer (400) is formed on the front surface of the lens filter (110), and a swirling layer is created to provide the effect of fundamentally blocking the penetration of particles.

[0083] To explain in detail, the lens filter case (100) or front case (300) is an external case structure that protects the camera, and is preferably formed of AL6061 aluminum.

[0084] In addition, it becomes possible to provide durability to maintain a stable structure for a long period.

[0085] To explain the lens filter case as an example, the lens filter case is a case structure that protects the camera and is generally made of metal or plastic; however, in the present invention, it is preferable to use AL6061 aluminum alloy to ensure durability.

[0086] However, it is obvious that various materials, such as other metal materials or reinforced plastics, can be used.

[0087] In addition, the lens filter case is formed with a lens filter (110) that serves to protect the camera module installed in the camera body (500) from the external environment, and is combined with other components such as a front case to form an overall camera housing system.

[0088] Meanwhile, the front case must be designed to form an optimal airflow by taking into account the angle of the front case and the spacing of the air outlet, and through this design, a stable pressure of 1 Bar or more (e.g., 1.45 Bar or more) is formed on the front of the lens filter (110), thereby effectively preventing dust and floating particles from adhering.

[0089] And, in the case of Fig. 2, a graph showing the results of a durability test of a lens filter case or a front case is shown, where the X-axis represents time (months) and the Y-axis represents durability (%).

[0090] At this time, the blue line shows the durability maintained over time by the AL6061 lens filter case, and it was confirmed that it stabilized after a rapid change in durability during the first 6 cycles, and maintained more than 80% of its durability even after 30 cycles.

[0091] And, as shown in FIG. 1, the air inlet (200) serves as a passage for injecting air pressure of 2 Bar or more.

[0092] As mentioned above, the reason for injecting air pressure of 2 Bar or higher is as follows.

[0093] That is, if it is less than 2 Bar, the air shielding layer formed on the front of the lens filter is formed at less than 1 Bar, so it cannot effectively block the penetration of dust / floating particles caused by external wind (3 m / s).

[0094] In particular, at 2 Bar or lower, the air shielding layer becomes unstable and loses its protective function, and as a result of the experiment, the efficiency dropped to less than 35%.

[0095] Therefore, in the present invention, air pressure of 2 Bar or more is injected into the housing.

[0096] Through this, a stable air shielding layer of 1 Bar or more can be formed on the front of the lens, and an optimal efficiency of 49% (input-to-output pressure ratio) can be achieved.

[0097] In addition, it can maintain a stable protective shield even under external wind conditions (3 m / s) and provide an optimal balance between equipment lifespan and energy efficiency.

[0098] Meanwhile, the supplied air pressure is 2 Bar or higher, preferably within the range of 2 Bar to 15 Bar, and in the experimental example of the present invention, the experiment was conducted by supplying about 3 Bar, and it is obvious that less than or more than 3 Bar can be supplied.

[0099] And, in the case of Fig. 3, it is a graph showing the efficiency according to the input pressure, and the efficiency according to the input pressure can be summarized as follows.

[0100] In other words, in the 3 Bar range, energy efficiency and system stability are excellent, and optimal conditions are provided for the formation of a protective film.

[0101] In addition, the 4 Bar range provides the highest efficiency and optimizes the ability to form a protective shield and block particles, so it is considered to be the most ideal condition.

[0102] In addition, in the 5 Bar range, efficiency decreases somewhat, but it still provides stable protective shield formation and sufficient system performance.

[0103] Therefore, a pressure range between 3 Bar and 4 Bar is optimally recommended, and the system can operate effectively even at 5 Bar.

[0104] This was confirmed based on experimental results under the condition of a lens filter diameter of 42mm.

[0105] In addition, the front case (300) is formed at an angle of 20 to 40 degrees and is characterized by including air ejection portions with a spacing of 1 mm.

[0106] At this time, the optimal angle is 30 degrees, and for example, regarding efficiency by angle, it is possible to provide a pressure efficiency of 34% at 20 degrees, a pressure efficiency of 49% (optimal) at 30 degrees, and a pressure efficiency of 42% at 40 degrees.

[0107] That is, Figure 4 is a graph comparing pressure efficiency by angle, where the X-axis represents the angle (10 to 50 degrees) and the Y-axis represents the pressure efficiency (0 to 100%).

[0108] At this time, the blue line shows the change in efficiency by angle, and as a key feature, it was found that the maximum efficiency (49%) was observed at 30 degrees, the efficiency decreased rapidly below 20 degrees, and the efficiency decreased gradually above 40 degrees.

[0109] To elaborate, since the pressure efficiency is highest at 49% at a 30-degree angle, the air shielding layer formed on the front of the lens becomes the strongest, which effectively prevents dust and debris from adhering to the lens, thereby minimizing camera performance degradation.

[0110] In addition, since the amount of air required to generate the same pressure can be reduced through the optimal angle, this can increase energy efficiency and reduce the burden on the air injection system, contributing to an extended equipment lifespan.

[0111] In addition, optimizing the angle of the front case can improve the overall stability of the system, thereby reducing unnecessary air consumption and minimizing pressure fluctuations, which will allow for stable operation of the camera over an extended period.

[0112] In addition, the fact that the optimal angle is 30 degrees can provide flexibility in housing design, allowing the front case to be positioned while minimizing interference with other components.

[0113] I will explain the experimental data regarding this in more detail below.

[0114] And, the air shielding layer (400) is formed through the air ejection part (700), for example, forming a uniform layer of 2 to 5 mm and forming a protective area of ​​the lens diameter + 10 mm range.

[0115] In addition, as for air flow characteristics, the flow velocity can be 5 to 10 m / s, the flow pattern can be maintained as laminar, and the turbulence suppression rate can be 95% or higher.

[0116] In addition, Figure 5 is a graph showing the stability of the air shield layer over a long period of time, where the X-axis represents the experimental time and the Y-axis represents the pressure value (0 to 2.0 Bar), and the green area indicates the stabilization section at the target pressure (1.45 Bar).

[0117] At this time, as a stability characteristic, it was found that there was a pressure increase section during the first 24 cycles, and thereafter, a very stable pressure of 1.45±0.02 Bar was maintained for more than 120 cycles, and the pressure fluctuation range was found to be very small at ±0.02 Bar.

[0118] Furthermore, regarding long-term operational reliability, the system's long-term reliability has been proven by the absence of pressure drop during continuous operation and the maintenance of a wide and constant stabilization range.

[0119] And, the air shielding layer is preferably characterized by forming a pressure of 1.45 Bar or more on the front surface of the lens filter.

[0120] For example, regarding pressure formation characteristics, the air inlet pressure is 3 Bar (inlet pressure), the formation pressure is 1.45 Bar (front of lens), and the pressure efficiency is 49% (Pout / Pin × 100).

[0121] In addition, regarding the pressure distribution characteristics, the air discharge pressure is 1.45 Bar (maximum), the outer pressure is 1.2 Bar (minimum), and the uniformity is within ±0.1 Bar.

[0122] In addition, Figure 6 is a graph showing the pressure distribution by position on the lens surface, where the X-axis represents the distance from the center of the lens (-30mm to +30mm), the Y-axis represents the pressure formed (1.0Bar to 1.8Bar), and the green area indicates the optimal pressure range.

[0123] At this time, it was observed that a maximum pressure of 1.45 Bar was formed at the center, and a gradual decrease in pressure was observed towards the outer edge.

[0124] In addition, it can be seen that optimal pressure is maintained within a range of ±15mm.

[0125] Below, the pressure change of the front case (300) by angle will be explained with reference to FIGS. 7 to 14.

[0126] The left image of Fig. 7 shows the airflow as a blue arrow and the vortex phenomenon inside the housing as orange, representing a basic structure in a simple form where air is ejected vertically.

[0127] Additionally, the image on the right depicts the overall airflow pattern using blue arrows, showing the direction of airflow around the camera housing in detail and indicating the air path on the side of the housing.

[0128] In addition, for the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 350) and the Y-axis represents the pressure value (1.00 to 1.02 bar), showing that the initial unstable pressure gradually stabilizes (1.01 bar) and maintains a stable pressure from the 50th repetition onwards.

[0129] Upon analysis, the efficiency is low due to the simple vertical injection method, unstable vortices are generated frequently, and the pressure maintenance is low at the 1.01 bar level.

[0130] This is experimental data showing the limitations of the basic model that requires improvement.

[0131] Also, the left image of Fig. 8 (air flow pattern) shows the air flow in a linear (0 degree) structure, whereby vortices around the housing are reduced and air is dispersed over a wider range.

[0132] In this case, the yellow-blue gradient represents the pressure distribution (0.12–4.16 bar), showing a more efficient air diffusion pattern compared to the existing model.

[0133] The image on the right (flow analysis) indicates that the directionality of the airflow has been improved to be more uniform, showing efficient airflow through the air inlet (200, yellow area), and that the air layer in front of the lens is formed more stably.

[0134] In addition, for the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 120) and the Y-axis represents the pressure value (1.00 to 1.30 bar). It can be seen that an unstable section occurred up to the first 20 repetitions, a gradual increase in pressure was observed in the 20 to 80 repetitions, and the pressure stabilized at 1.25 bar after 80 repetitions, indicating an increase in pressure of approximately 24% compared to the existing model (1.01 bar).

[0135] In interpretation, it indicates that a higher pressure (1.25 bar) can be achieved, which enables the formation of a stable air layer, provides an efficient air flow pattern, reduces vortex phenomena, and secures a wide protection area.

[0136] This is experimental data showing that the limitations of the basic model have been effectively improved.

[0137] Also, the left image of Fig. 9 (airflow pattern) shows a pattern of air being ejected at an angle of 20 degrees, and it can be seen that the airflow spreads widely in a V-shape.

[0138] At this time, the pressure distribution is in the range of 0.36 to 4.32 bar, and the green area at the bottom indicates the generation of vortices.

[0139] The image on the right (flow analysis) shows that the overall direction of the airflow is formed at a 20-degree angle, with weak pressure (green area) observed at the side air inlet, and the dark blue in the center indicates a pressure concentration area.

[0140] In addition, for the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 120) and the Y-axis represents the pressure value (0.96 to 1.04 bar). It was observed that unstable pressure fluctuations occurred up to the first 20 repetitions, followed by a sharp pressure drop (0.96 bar) around the 35th repetition, a rapid increase after the 40th repetition, and then gradually stabilized, finally maintaining a level of 1.00 bar.

[0141] Upon analysis, pressure maintenance is unstable, the maximum pressure is relatively low, and there is a somewhat large amount of vortex generation, so the overall efficiency is relatively low.

[0142] This is experimental data showing that a 20-degree angle is less efficient than the optimal angle (30 degrees).

[0143] Also, the left image of Fig. 10 (airflow pattern) shows a pattern in which air is ejected at an optimal angle of 30 degrees, and it was confirmed that the airflow spreads out in a uniform conical shape.

[0144] In addition, the pressure distribution ranged from 0.36 to 4.43 bar, and the vortex in the green area at the bottom was reduced compared to the 20-degree model.

[0145] The image on the right (flow analysis) shows that the overall airflow is uniformly formed at a 30-degree angle, stable pressure (yellow area) was observed at the side air inlet, and the blue area in the center is evenly distributed.

[0146] In addition, regarding the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 120) and the Y-axis represents the pressure value (1.00 to 1.50 bar). It was observed that while there were slight fluctuations up to the first 20 repetitions, the pressure showed a stable increase in the 20 to 60 repetition range and stabilized at 1.42 bar after 60 repetitions, indicating that it provided the highest and most stable pressure maintenance overall.

[0147] The experimental data shows that the highest pressure (1.45 bar) was achieved, very stable pressure can be maintained, and optimal protective shield formation is possible by minimizing vortex generation and forming a uniform airflow.

[0148] Also, the left image of Fig. 11 (air flow pattern) shows a pattern of air being ejected at a 40-degree angle, and the air flow shows an excessive spreading phenomenon in a wide V-shape, with a pressure distribution in the range of 0.39 to 4.56 bar, and the vortex in the green area at the bottom has increased compared to the 30-degree model.

[0149] The image on the right (flow analysis) shows that the airflow is spreading too widely due to the steep angle of 40 degrees, unstable pressure (green area) is observed near the side air inlet, and the blue pressure area in the center is more spread out than in the 30-degree model.

[0150] In addition, for the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 120) and the Y-axis represents the pressure value (1.00 to 1.50 bar). It was observed that unstable fluctuations occurred up to the first 20 repetitions, and a gradual increase in pressure was provided in the 20 to 60 repetition range, rising up to a maximum of 1.42 bar, which is lower than the 30-degree model, and a slight decrease in pressure occurred after 80 repetitions.

[0151] In interpretation, it provides a lower maximum pressure compared to the 30-degree model, and the excessive diffusion of airflow causes a decrease in efficiency and an increase in unstable vortices, which reduces the stability of pressure maintenance and consequently leads to a decrease in energy efficiency.

[0152] This is experimental data showing that the performance of a 40-degree angle is slightly lower than that of an optimal 30-degree angle.

[0153] Also, the left image of Fig. 12 (air flow pattern) shows air being ejected at a very wide angle of 60 degrees, showing an excessively wide V-shape of air flow, a pressure distribution in the range of 0.36 to 4.80 bar, and a green area at the bottom that is widely distributed, indicating a phenomenon where vortices become severe.

[0154] The image on the right (flow analysis) shows that the airflow is very unstable due to the steep angle of 60 degrees, and uneven pressure (green area) is observed at the side air inlet, while the blue pressure area in the center is significantly weakened, indicating that the overall airflow is sporadic.

[0155] In addition, for the bottom graph (SG average static pressure 1), the X-axis represents the number of repetitions (0 to 120) and the Y-axis represents the pressure value (1.00 to 1.50 bar). This indicates that there is a large fluctuation up to the first 20 repetitions, followed by an unstable pressure rise in the 20 to 60 repetition range, reaching up to 1.40 bar but with low efficiency, and that pressure maintenance is unstable after 60 repetitions.

[0156] In other words, significant dispersion of airflow leads to reduced efficiency, and excessive vortex generation and unstable pressure formation result in lower performance and greater energy loss compared to 30 degrees.

[0157] This is experimental data showing that the performance of a 60-degree angle is significantly lower than that of the optimal angle of 30 degrees.

[0158] In addition, Figure 13 is a comparison table showing pressure results when the air inlet pressure is 3 Bar, the material used is AL6061, the temperature is ambient temperature, the external conditions are ambient temperature of 25 degrees and ambient pressure of 1 Bar, and the external wind conditions are a low to medium wind of 3 m / s. In the comparison according to terminal spacing, the 1.0 mm terminal forms a pressure of 1.1 Bar and the 1.5 mm terminal forms a pressure of 1.01 Bar, so it was found that the 1.0 mm terminal forms a more efficient pressure.

[0159] In addition, regarding the performance analysis by angle (based on a terminal of 1.0 mm), it was found that the straight 0° angle was 1.25 Bar, the 20° angle was 1.02 Bar, the 30° angle was 1.45 Bar (maximum efficiency), the 40° angle was 1.42 Bar, and the 60° angle was 1.39 Bar.

[0160] At this time, as a key finding, it was confirmed that the optimal angle is 30°, and at a 30° angle, a maximum pressure of 1.45 Bar is formed, and it was found that the terminal spacing is optimal at 1.0 mm.

[0161] And, it was found that efficiency decreased as the angle deviated from 30°.

[0162] In addition, regarding efficiency ranking, the highest efficiency is 1.45 Bar at 30°, 1.42 Bar at 40°, 1.39 Bar at 60°, 1.25 Bar at 0° straight, 1.02 Bar at 20°, and 1.01 to 1.1 Bar for other conditions.

[0163] Referring to the experimental data above, it is clearly shown that an angle of 30° and a terminal spacing (step) of 1.0mm are the most optimal design conditions, and this has sufficient critical significance.

[0164] Accordingly, the front case (300) of the present invention is formed at an angle of 20 to 40 degrees and is characterized by including an air ejection section with a spacing of 1 mm (terminal spacing).

[0165] That is, as illustrated in FIG. 14, if 3 Bar of air pressure is injected through the air inlet (200) and the front case is configured with a step of 15 degrees (indicated angle 30 degrees) and 1.0 mm, it is possible to provide the highest efficiency of 49% relative to the input.

[0166] To reiterate based on the explanations given so far, it is as follows.

[0167] As illustrated in FIG. 1, it is characterized by further including an air inlet (200) that draws in pressurized air from an air compressor (210), wherein the pressurized air passes through an oil and moisture removal filter.

[0168] Specifically, the pressurized air generated by the air compressor (210) may generally contain fine oil mist and moisture, and if this oil mist and moisture come into direct contact with the camera lens, the following problems may occur.

[0169] First, regarding lens contamination, oil forms an oil film on the lens surface, degrading image clarity, while moisture can leave stains or damage the lens coating.

[0170] In particular, prolonged exposure may also pose a risk of causing permanent damage to the lens surface.

[0171] Second, regarding mold growth, moisture is a major cause of mold proliferation. If mold develops inside the lens, it causes the inconvenience of having to disassemble and clean the lens, and in severe cases, the lens may need to be replaced.

[0172] Third, regarding internal component corrosion, if moisture comes into contact with the camera's internal parts, it can cause corrosion and shorten the equipment's lifespan.

[0173] Therefore, to protect the lens and camera and maintain clear images, it is essential to effectively remove oil and moisture from the pressurized air generated by the air compressor.

[0174] And, it is characterized by forming an air passage between the lens filter case (100) and the front case (300).

[0175] For example, as illustrated in FIG. 15, the front case (300) and the lens filter case (100) can be joined by a screw thread connection method, wherein screw threads are formed on the inner surface of the front case (300) and the outer surface of the lens filter case (100), thereby providing a structure that allows the two parts to be joined by rotating.

[0176] At this time, a precisely calculated air passage can be formed between the two parts, and this air passage plays a key role in efficiently delivering pressurized air generated from the air compressor (210) to the front of the lens filter (110) to form an air shielding layer (400).

[0177] In addition, the air passage must not be merely an empty space between two parts, but must be designed with precise specifications and shape for the following reasons.

[0178] First, as a uniform airflow, the air passage must induce airflow so as to form a uniform air shielding layer (400) on the front surface of the lens filter (110), and for this purpose, the cross-sectional area, length, shape, etc. of the air passage must be precisely designed.

[0179] Second, regarding the formation of a swirl layer, as described above, the present invention maximizes the particle blocking effect by causing pressurized air to move in a swirling form across the front of the lens filter (110).

[0180] This swirl layer is realized by having the end of the lens filter case (100) longer than the front case (300) and having a tapered angle (T), and at this time, the air passage should also be designed to contribute to the formation of this swirl layer.

[0181] That is, this is because the airflow moving along the air passage must be naturally guided to the tapered angle (T) of the lens filter case (100) and the air outlet (700).

[0182] Third, as a measure to minimize pressure loss, the pressure loss occurring while passing through the air passage must be minimized. If the pressure loss is large, the air compressor (210) is overloaded and energy efficiency decreases, and the pressure of the air shielding layer (400) formed on the front of the lens filter (110) is weakened, which may reduce the particle blocking effect.

[0183] In addition, depending on the additional aspect, the lens filter case (100) is formed longer than the front case (300), has a tapered angle (T), and is characterized by forming a vortex layer in which pressurized air moves outward in a vortex shape.

[0184] For example, if the lens filter case (100) protrudes longer than the front case (300), pressurized air introduced through the air inlet (200) is naturally guided along the wall of the lens filter case (100), and this protruding length guides the air to travel a sufficient distance before heading toward the front of the lens filter (110), thereby helping to form a uniform and stable airflow.

[0185] Additionally, the protruding portion of the lens filter case (100) provides a space for pressurized air to move in a vortex shape. Specifically, air introduced through the air passage between the lens filter case (100) and the front case (300) rotates in the protruding space of the lens filter case (100) to form a vortex layer.

[0186] Meanwhile, the tapered angle (T) of the lens filter case (100) means that the end of the lens filter case (100) is narrowed. Due to this tapered angle, the speed of the air increases, creating a strong vortex-shaped airflow, i.e., a vortex layer, at the front of the lens filter (110). The air rotating along the tapered angle receives centrifugal force, and this centrifugal force causes the airflow to flow outward, i.e., from the center of the lens filter (110) outward.

[0187] In the following, the configuration of the present invention described so far will be explained in detail.

[0188] That is, an air-shielded camera housing for particle blocking according to one embodiment of the present invention is,

[0189] Camera body (500);

[0190] Lens filter case (100);

[0191] An air inlet (200) that draws in pressurized air through an air compressor (210) and a filter;

[0192] Air passage between the front case (300) and the lens filter case (100);

[0193] Air outlet (700);

[0194] An air shielding layer (400) formed on the front surface of a lens filter (110); and

[0195] It includes a vortex layer in which pressurized air moves outward in a vortex shape, and

[0196] The lens filter case (100) is formed to be longer than the front case (300) and is characterized by having a tapered angle (T).

[0197] Specifically, the camera body (500) includes core components of the camera such as an image sensor, a control circuit, and a lens mount, and serves as a base to which the lens filter case (100) and other components are combined.

[0198] The above lens filter case (100) serves to protect the lens filter (110) and forms an air passage by combining with the front case (300).

[0199] In addition, it is formed to be longer than the front case (300) to induce airflow and secure a space for forming a vortex layer.

[0200] The air inlet (200) is a passage for introducing air pressurized through an air compressor (210) and a filter, and the air passage is a space formed between the front case (300) and the lens filter case (100), which is a path for the pressurized air supplied from the air inlet (200) to the front of the lens filter (110).

[0201] The above air ejection part (700) is located at the end of the lens filter case (100) and is a part where pressurized air passing through the air passage is ejected to the front of the lens filter (110), and contributes to the formation of a swirl layer with a tapered angle (T).

[0202] The above air shielding layer (400) is an air layer formed on the front surface of the lens filter (110) and serves to prevent particles from coming into direct contact with the lens filter (110).

[0203] At this time, it may have characteristics such as a uniform layer of 2 to 5 mm, a protection area in the range of lens diameter + 10 mm, a flow velocity of 5 to 10 m / s, a flow pattern that maintains laminar flow, and a turbulence suppression rate of 95% or more.

[0204] The above vortex layer is a vortex-shaped airflow formed by the tapered angle (T) of the lens filter case (100) and the air ejection part (700), in which pressurized air moves outward in a vortex shape. This rapidly rotates outward from the front of the lens filter (110) and protects the lens filter (110) by using centrifugal force to bounce off particles or divert them from their path.

[0205] According to the present invention, an air shielding layer is formed on the front surface of the lens and a vortex layer is implemented to provide the effect of fundamentally blocking the penetration of particles.

[0206] Those skilled in the art to which the present invention pertains will understand that the present invention, as described above, may be implemented in other specific forms without altering the technical concept or essential features of the invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

[0207] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention.

[0208] [Explanation of the symbol]

[0209] 100 : Lens filter case

[0210] 200 : Air inlet

[0211] 300 : Front case

[0212] 400 : Air shielding layer

Claims

1. In an air-shielded camera housing for particle blocking, A lens filter case (100) having a lens filter (110) inside; It includes a front case (300) provided on the outer side of the lens filter case (100) and forming an air passage between them; The lens filter case (100) is formed to be longer than the front case (300) and has a tapered angle (T); An air-shielding camera housing for particle blocking, characterized in that pressurized air introduced through the above air passage is ejected in a swirling form from the front of the lens filter (110) by the shape of the lens filter case (100) to form an air-shielding layer (400) and a swirling layer advancing outward.

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