Imaging device
By setting a target area with a thickness smaller than other areas in the camera device housing, the problem of increased cost during defogging of the camera device is solved, and the effect of preventing fogging of the viewing window glass can be achieved without additional components.
Patent Information
- Application Number
- CN202411913554.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-06-26
AI Technical Summary
Existing camera equipment incurs additional costs when defogging, typically requiring the inclusion of a fan within the device.
By setting a target area with a thickness smaller than other areas in the casing of the camera device, the temperature of this target area is always lower than that of the viewing window glass. As a result, when the air inside the camera device cavity becomes saturated, water molecules preferentially condense in the target area instead of condensing on the glass viewing window.
It effectively prevents fogging of the viewing window, reduces the cost of camera equipment, and eliminates the need for defogging devices inside the equipment.
Smart Images
Figure CN122293970A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electronic technology, and more particularly to a camera device. Background Technology
[0002] With the rapid development of the security industry, video surveillance equipment is being used more and more widely. However, as outdoor products, the viewing windows of video surveillance equipment often condense fog, affecting normal monitoring. The main reason for this fogging is that the viewing window is the lowest-temperature point on the inner surface of the camera's cavity. Once water vapor reaches saturation within the cavity and the temperature of the viewing window is below the condensation point of that water vapor, fogging occurs. Fogging in video surveillance equipment affects video capture and acquisition, posing a significant security risk as a front-end image product in security systems.
[0003] In related technologies, a fan is usually installed inside the camera equipment, and the airflow from the fan is blown toward the glass window to achieve the purpose of defogging.
[0004] However, the aforementioned technologies require the installation of a fan in the camera equipment, which increases the cost of the camera equipment when performing defogging. Summary of the Invention
[0005] This invention provides a camera device to address the shortcomings of existing technologies that increase the cost of camera devices when performing defogging.
[0006] The present invention provides a camera device, including a lens assembly, a viewing window, and a housing, wherein the lens assembly is disposed inside the housing, the viewing window is disposed on the housing, and the viewing window and the lens assembly are disposed opposite to each other; The thickness of the target area near the viewing window glass in the housing is less than the thickness of other areas of the housing.
[0007] According to a camera device provided by the present invention, the housing includes a first sidewall, a second sidewall, and a third sidewall, the first sidewall and the second sidewall being disposed opposite to each other, the third sidewall being located between the first sidewall and the second sidewall and connected to the first sidewall and the second sidewall, the target area being located on at least one of the first sidewall, the second sidewall, and the third sidewall, and the viewing window being located on the third sidewall.
[0008] According to a camera device provided by the present invention, the third sidewall includes a first region and a second region, the viewing window is located between the first region and the second region, and the target region is located in the first region and / or the second region.
[0009] According to a camera device provided by the present invention, the area of the first region is smaller than the area of the second region, and the target region is located in the second region.
[0010] According to a camera device provided by the present invention, the distance between the heat source of the camera device and the viewing window glass is the same as the distance between the heat source and the target area, wherein the heat source is a device in the camera device that generates heat.
[0011] According to the present invention, the camera device is located in a target environment, the target environment being an environment in which the temperature of the rear end of the housing is greater than the temperature of the front end of the housing, and the viewing window is located at the front end.
[0012] According to a camera device provided by the present invention, the target environment includes an environment in which the rear end of the housing is illuminated by the sun and the front end of the housing is not illuminated.
[0013] According to a camera device provided by the present invention, the target environment includes an environment in which rain and snow fall on the front end when the front end of the housing is tilted upward.
[0014] According to a camera device provided by the present invention, the target environment includes an environment in which the front end of the housing is located in a liquid and the rear end of the housing is exposed to sunlight.
[0015] According to a camera device provided by the present invention, the thickness of the target area is related to the material of the target area, the temperature difference of the target area, the heat transferred from the heat source of the camera device to the target area, and the heat transferred from the target area to the target environment.
[0016] The camera device provided by this invention includes a lens assembly, a viewing window, and a housing. The lens assembly is disposed within the housing, and the viewing window is disposed on the housing. The viewing window and the lens assembly are positioned opposite each other. The thickness of the target area near the viewing window within the housing is less than the thickness of other areas of the housing. This ensures that the temperature rise or fall of the target area is consistently lower than that of the viewing window. Therefore, when the air inside the camera device cavity reaches saturation, water molecules preferentially condense in the target area, thus preventing fogging of the viewing window. Furthermore, by preventing fogging of the viewing window, there is no need to include defogging devices within the camera device, thereby reducing the cost of the camera device. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is one of the structural schematic diagrams of the camera device provided in the embodiments of the present invention.
[0019] Figure 2 This is one of the schematic diagrams showing the temperature change over time of the target area and the viewing window glass provided in the embodiments of the present invention.
[0020] Figure 3 This is the second schematic diagram of the temperature change over time of the target area and the viewing window glass provided in the embodiments of the present invention.
[0021] Figure 4 This is the second structural schematic diagram of the camera device provided in the embodiment of the present invention.
[0022] Figure 5 This is the third structural schematic diagram of the camera device provided in the embodiment of the present invention.
[0023] Figure 6 This is a scene diagram of the camera device provided in an embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0025] Figure 1 This is one of the structural schematic diagrams of the camera device provided in the embodiments of the present invention, such as... Figure 1 As shown, the camera device includes a lens assembly, a viewing window, and a housing. The lens assembly is disposed inside the housing, and the viewing window is disposed on the housing. The viewing window and the lens assembly are disposed opposite to each other.
[0026] The thickness of the target area near the viewing window glass in the housing is less than the thickness of other areas of the housing.
[0027] The outer shell can be made of materials such as polycarbonate.
[0028] For example, such as Figure 1 As shown, the blue part is the window glass, the yellow part is the target area of the housing, the gray area on the housing is other areas. The target area is close to the window glass, and the thickness of the target area is less than the thickness of other areas of the housing, so that the temperature of the target area is always lower than the temperature of the window glass. Thus, when the air in the camera device cavity reaches saturation, water molecules will preferentially condense on the target area rather than on the glass window, thereby preventing the window glass from fogging up.
[0029] After the thickness of the target area is less than the thickness of other areas of the housing, when the air in the camera device cavity reaches saturation, water molecules will preferentially condense on the target area rather than on the glass window. The demonstration process of this conclusion is as follows: It can be verified through heat transfer analysis. Combining Figure 1 , perform heat transfer analysis on the target area. From the heat transfer equation, when the camera device is powered on and working, the heat transferred from the heat source inside the camera device to the target area can be expressed by the following formula (1): where, represents the heat transfer coefficient from the heat source inside the camera device to the target area, represents the temperature of the internal heat source, represents the temperature of the target area, represents the heat transfer area from the heat source inside the camera device to the target area.
[0030] The heat transferred from the target area to the external environment can be expressed by the following formula (2): where, represents the heat transfer coefficient from the target area to the external environment, represents the temperature of the external environment, represents the temperature of the target area, represents the heat transfer area from the target area to the external environment.
[0031] According to the heat balance equation, when Q1>Q2, the target area heats up; when Q1<Q2, the target area cools down; when Q1 = Q2, the temperature rise of the target area remains unchanged.
[0032] Therefore, when the target area heats up, that is, during the process of the camera device being powered on and working, the relationship between the temperature rise of the target area and , can be expressed by the following formula (3): where, This indicates the specific heat capacity of the material in the target area. Indicates the quality of the target region. This indicates the temperature rise in the target area.
[0033] Similarly, when the target area cools down, that is, during the process of the external environment's temperature decreasing, the cooling of the target area is related to... , The relationship can be expressed by the following formula (4): in, This indicates the temperature drop in the target area. Changes in the mass of the target area can be reflected in the temperature change, while the specific heat capacity does not change for the outer shell itself.
[0034] As can be seen from the formula, the temperature difference between the target area and the external environment before and after thinning is negatively correlated with the mass. Therefore, the temperature difference between the target area and the external environment after thinning is greater than the temperature difference between the target area and the external environment before thinning. In other words, the target area dissipates heat faster after thinning.
[0035] Furthermore, verification was conducted through transient thermal simulation, combined with... Figure 1 The schematic diagram of the camera equipment shown is displayed at room temperature (25°C). In an external environment, a certain power consumption value is assigned to the motherboard of the camera device to simulate the heat generated by the camera device when it starts up at room temperature. When the camera device is powered on, the target area and the viewing window glass are affected by the heat generated by the heat source inside the camera device, and the temperature gradually rises. Figure 2 This is one of the schematic diagrams showing the temperature change over time of the target area and the viewing window glass provided in this embodiment of the invention, such as... Figure 2 As shown, blue represents the temperature change of the target area, and orange represents the temperature change of the glass window. When the camera is powered on, the rate of temperature change of the target area is lower than the rate of temperature change of the window glass. In other words, the temperature rise of the target area is less than the temperature rise of the window glass, which further proves that the heat dissipation is faster after the target area is thinned. At this time, if the heat source of the camera generates a temperature rise due to power, the moisture it dries out will meet the conditions for water molecules in the air of the camera cavity to condense and will preferentially condense in the target area, thereby achieving the purpose of preventing the window glass from fogging.
[0036] Combined Figure 1 The diagram shown illustrates the structure of the camera equipment, which controls the camera equipment at 40... After the camera has been running stably in the environment, place it at 25 degrees Celsius. The external environment was simulated to depict a sudden drop in temperature in the camera's surroundings during operation. During this process, the temperature of the target area and the viewing window glass was affected by the external ambient temperature, gradually decreasing. Figure 3This is the second schematic diagram of the temperature change over time of the target area and the viewing window glass provided in this embodiment of the invention, as shown below. Figure 3 As shown, blue represents the temperature change of the target area, and orange represents the temperature change of the glass window. When the ambient temperature drops sharply, the rate of temperature change in the target area is higher than that in the window glass. In other words, the temperature drop in the target area is greater than that in the window glass, which further proves that the heat dissipation is faster after the target area is thinned. At this time, if the heat source of the camera device generates a temperature rise due to power, the moisture it dries out will meet the conditions for water molecules in the air inside the camera device cavity to condense, and will preferentially condense in the target area, thereby achieving the purpose of preventing fogging of the window glass.
[0037] It should be noted that, as Figure 1 As shown, the camera device also includes a motherboard connected to the lens assembly, etc., but the present invention does not limit this.
[0038] The camera device provided by this invention includes a lens assembly, a viewing window, and a housing. The lens assembly is disposed within the housing, and the viewing window is disposed on the housing. The viewing window and the lens assembly are positioned opposite each other. The thickness of the target area near the viewing window within the housing is less than the thickness of other areas of the housing. This ensures that the temperature rise or fall of the target area is consistently lower than that of the viewing window. Therefore, when the air inside the camera device cavity reaches saturation, water molecules preferentially condense in the target area, thus preventing fogging of the viewing window. Furthermore, by preventing fogging of the viewing window, there is no need to include defogging devices within the camera device, thereby reducing the cost of the camera device.
[0039] In one embodiment, Figure 4 This is a second structural schematic diagram of the camera device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the housing includes a first sidewall, a second sidewall, and a third sidewall. The first sidewall and the second sidewall are disposed opposite to each other. The third sidewall is located between the first sidewall and the second sidewall and is connected to the first sidewall and the second sidewall. The target area is located on at least one of the first sidewall, the second sidewall, and the third sidewall. The viewing window is located on the third sidewall.
[0040] For example, such as Figure 4As shown, the first and second sidewalls are both located on the outer casing near the viewing window glass. The first and second sidewalls are two opposing sidewalls of the outer casing. The third sidewall is not on the same sidewall as the first sidewall, nor is it on the same sidewall as the second sidewall. The viewing window glass is located on the third sidewall. The target area can be a portion or the entire area of the first sidewall, or a portion or the entire area of the second sidewall. The target area can also include a portion of the first sidewall and a portion of the second sidewall, or the entire area of the first sidewall and the entire area of the second sidewall. The target area can also include all or part of the area on the third sidewall except for the area where the viewing window glass is located. The target area can also include areas on the first sidewall, the second sidewall, and the third sidewall; this invention does not limit this.
[0041] It should be noted that, as Figure 4 As shown, the first sidewall and the fourth sidewall form the first complete sidewall of the shell, and the second sidewall and the fifth sidewall form the second complete sidewall of the shell. The first complete sidewall and the second complete sidewall are arranged opposite to each other.
[0042] In this embodiment, the target area can be located on at least one of the first, second, and third sidewalls. This ensures that the temperature of at least one of the first, second, and third sidewalls rising or falling is always lower than the temperature of the viewing window glass. Therefore, when the air inside the camera device cavity reaches saturation, water molecules will preferentially condense on at least one of the first, second, and third sidewalls, thereby preventing fogging of the viewing window glass.
[0043] In one embodiment, Figure 5 This is the third structural schematic diagram of the camera device provided in the embodiment of the present invention, as shown below. Figure 5 As shown, the third sidewall includes a first region and a second region, the viewing window is located between the first region and the second region, and the target region is located in the first region and / or the second region.
[0044] For example, such as Figure 5 As shown, the viewing window is positioned between the first and second regions of the third sidewall. The target region can be a part or the entire first region, or a part or the entire second region. Alternatively, the target region can be a part of the first region and a part of the second region, or the entire first region and the entire second region.
[0045] It should be noted that the third sidewall may also include only the fourth and fifth regions, where the fourth region is the area where the viewing window glass is installed, and the fifth region is the target area. This invention does not limit this.
[0046] In this embodiment, the target area can be located in the first and / or second areas of the third sidewall. This ensures that the temperature of the first and / or second areas of the third sidewall is always lower than that of the viewing window. Therefore, when the air inside the camera device cavity reaches saturation, water molecules will preferentially condense in the first and / or second areas of the third sidewall, thereby preventing fogging of the viewing window. Furthermore, since the first and second areas are close to the viewing window, the effect of preventing fogging of the viewing window is even better.
[0047] In one embodiment, the area of the first region is smaller than the area of the second region, and the target region is located in the second region.
[0048] For example, such as Figure 5 As shown, the area of the first region is smaller than that of the second region, and both the first and second regions are close to the window glass. In order to improve the robustness of the casing, the thickness of the second region, which has a larger area, can be reduced as the target region.
[0049] In this embodiment, the second area with a larger area on the third sidewall is taken as the target area, and the thickness of the second area is less than that of other areas. This can improve the robustness of the camera device's casing and allow water molecules to preferentially condense in the second area when the air inside the camera device cavity reaches saturation, thereby preventing fogging of the viewing window glass.
[0050] In one embodiment, the distance between the heat source of the camera device and the viewing window is the same as the distance between the heat source and the target area, wherein the heat source is a device in the camera device that generates heat.
[0051] The heat source includes the motherboard of the camera equipment, the lens mechanism, or other devices that can generate heat.
[0052] For example, to ensure consistent heating between the target area and the viewing window, in practical applications, the distance between the heat source of the camera device and the viewing window should be the same as the distance between the heat source and the target area. The location of the heat source can be the equivalent location of all heat-generating components in the camera device. The distance between the heat source and the viewing window can be the distance between this equivalent location and the center of the viewing window or one side of the viewing window. The distance between the heat source and the target area can be the distance between this equivalent location and the center of the target area or one side of the target area; this invention does not limit this.
[0053] In this embodiment, the distance between the heat source of the camera device and the viewing window is set to be the same as the distance between the heat source and the target area, so as to ensure that the target area and the viewing window are heated in the same way, which can further improve the effect of preventing fogging of the viewing window. Of course, if the viewing window is affected more by the heat source of the camera device than the target area, the anti-fogging effect of the viewing window can also be achieved by thinning the target area.
[0054] In one embodiment, the camera device is located in a target environment, which is an environment in which the temperature of the rear end of the housing is greater than the temperature of the front end of the housing, and the viewing window is located at the front end.
[0055] For example, when the camera is located in the target environment, if the target environment causes the rear end temperature of the camera's casing to be higher than the front end temperature, the air temperature inside the camera's cavity will increase as the rear end temperature of the casing rises. Meanwhile, the front end temperature is relatively low, and the thickness of the target area is less than that of other areas, causing the temperature drop in the target area to be greater than the temperature drop in the viewing window. Therefore, when the air inside the camera's cavity reaches saturation, water molecules will preferentially condense in the target area, thus preventing fogging of the viewing window and ensuring normal monitoring by the camera.
[0056] In this embodiment, the problem of fogging of the viewing window glass of the camera device can be solved in a target environment where the temperature of the rear end of the housing is higher than that of the front end of the housing.
[0057] In one embodiment, the target environment includes an environment in which the rear end of the housing is exposed to sunlight and the front end of the housing is not exposed to sunlight.
[0058] Figure 6 This is a scene diagram of the camera device provided in an embodiment of the present invention, such as... Figure 6 As shown, the rear end of the camera device's casing is illuminated by the sun, while the front end is not. The front end of the casing is relatively cool. Under the combined influence of the sun's illumination at the rear end and the coolness at the front end, the temperature at the rear end of the casing is significantly higher than that at the front end. However, because the thickness of the target area is less than that of other areas, the temperature of the target area is lower than that of the viewing window. Therefore, when the air inside the camera device cavity reaches saturation, water vapor will preferentially condense in the target area, thereby preventing the viewing window from fogging up.
[0059] In one embodiment, the target environment includes the environment in which rain and snow fall on the front end when the front end of the housing is tilted upwards.
[0060] For example, when the front end of the camera device housing is tilted upwards, if it rains or snows, the rain and snow will fall on the front end, causing the temperature of the front end of the housing to be significantly lower than that of the rear end. Since the thickness of the target area is less than that of other areas, the temperature of the target area drops faster than that of the viewing window. Therefore, when the air inside the camera device cavity becomes saturated, water vapor will preferentially condense in the target area, thereby preventing the viewing window from fogging up.
[0061] In one embodiment, the target environment includes an environment where the front end of the housing is in a liquid and the rear end of the housing is exposed to sunlight.
[0062] The liquid can be water or other liquids that need to be monitored, and the camera equipment can be waterproof camera equipment.
[0063] For example, when the front end of the camera device's housing is in a liquid and the rear end is exposed to sunlight, the temperature at the rear end of the housing will be significantly higher than the front end due to the combined effects of the sunlight and the liquid temperature. However, since the thickness of the target area is less than that of other areas, the temperature of the target area is lower than that of the viewing window. Therefore, when the air inside the camera device cavity becomes saturated, water vapor will preferentially condense in the target area, thereby preventing the viewing window from fogging up.
[0064] In one embodiment, the thickness of the target area is related to the material of the target area, the temperature difference of the target area, the heat transferred from the heat source of the camera device to the target area, and the heat transferred from the target area to the target environment.
[0065] For example, it can be seen from the above formulas (3) and (4) that the quality of the target area is related to the material of the target area, the temperature difference of the target area (the temperature rise or fall), the heat transferred from the heat source of the camera to the target area, and the heat transferred from the target area to the target environment (external environment). The quality of the target area is also related to the thickness of the target area. Therefore, in practical applications, the target environment in which the camera is installed can be determined first. In the target environment, the temperature difference of the target area and the heat transferred from the target area to the target environment can be obtained through experiments. Then, the thickness of the target area can be determined based on parameters such as the material of the target area, the temperature difference of the target area, the heat transferred from the heat source of the camera to the target area, the heat transferred from the target area to the target environment, and the internal structure of the camera.
[0066] In summary, this invention prevents fogging of the viewing window glass by modifying the thickness of a portion of the outer shell, thereby altering the condensation point position within the camera device's cavity. Compared to existing anti-fogging solutions, it eliminates the need for additional components inside the cavity, reducing costs while maximizing the use of space within the camera device's internal cavity. Furthermore, it effectively optimizes the camera device's active anti-fogging performance, resolving the fogging problem of the viewing window in camera devices.
[0067] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0068] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A camera device, characterized in that, The device includes a lens assembly, a viewing window, and a housing. The lens assembly is disposed within the housing, and the viewing window is disposed on the housing. The viewing window and the lens assembly are disposed opposite to each other. The thickness of the target area near the viewing window glass in the housing is less than the thickness of other areas of the housing.
2. The camera device according to claim 1, characterized in that, The housing includes a first sidewall, a second sidewall, and a third sidewall. The first sidewall and the second sidewall are disposed opposite to each other. The third sidewall is located between the first sidewall and the second sidewall and is connected to the first sidewall and the second sidewall. The target area is located on at least one of the first sidewall, the second sidewall, and the third sidewall. The viewing window is located on the third sidewall.
3. The camera device according to claim 2, characterized in that, The third sidewall includes a first region and a second region, the viewing window is located between the first region and the second region, and the target region is located in the first region and / or the second region.
4. The camera device according to claim 3, characterized in that, The area of the first region is smaller than the area of the second region, and the target region is located in the second region.
5. The camera device according to claim 1, characterized in that, The distance between the heat source of the camera device and the viewing window glass is the same as the distance between the heat source and the target area. The heat source is a device in the camera device that generates heat.
6. The camera device according to claim 1, characterized in that, The camera device is located in a target environment, which is an environment in which the temperature of the rear end of the housing is greater than the temperature of the front end of the housing, and the viewing window is located at the front end.
7. The camera device according to claim 6, characterized in that, The target environment includes an environment where the rear end of the housing is exposed to sunlight and the front end of the housing is not exposed to sunlight.
8. The camera device according to claim 6, characterized in that, The target environment includes the environment in which rain and snow fall on the front end when the front end of the shell is tilted upwards.
9. The camera device according to claim 6, characterized in that, The target environment includes an environment where the front end of the shell is in a liquid and the rear end of the shell is exposed to sunlight.
10. The camera device according to any one of claims 1-9, characterized in that, The thickness of the target area is related to the material of the target area, the temperature difference of the target area, the heat transferred from the heat source of the camera device to the target area, and the heat transferred from the target area to the target environment.