Arrangement of a motor vehicle camera cleaning nozzle

Abstract

The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle, it is related to automobile parts cleaning technical field.The application discloses a kind of arrangement of automobile camera cleaning nozzle.

Description

Technical Field

[0001] This application relates to the field of automotive parts cleaning technology, and in particular to a method for arranging cleaning nozzles for automotive cameras. Background Technology

[0002] With the development of automotive intelligence, exterior cameras are now widely used in systems such as driver assistance and panoramic imaging. Since cameras are constantly exposed to the elements, their surfaces are prone to accumulating mud, water, dust, and other contaminants. Therefore, all vehicles are equipped with cleaning nozzles.

[0003] The existing cleaning nozzles are mostly arranged manually based on experience, without taking into account the shape and structure of the camera. There is no unified standard, and the compatibility with cameras of different shapes is poor. This not only results in high consumption of washing liquid and low cleaning efficiency, but also creates cleaning blind spots. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, this application provides a method for arranging cleaning nozzles for automotive cameras to solve the problems existing in the background art.

[0005] In a first aspect, this application provides a method for arranging cleaning nozzles for automotive cameras, wherein the nozzles are fixed fan-shaped water nozzles, comprising: determining the type of automotive camera to be cleaned, classifying the cameras into protruding cameras and non-protruding cameras; configuring spatial position parameters of the nozzles relative to the cameras; wherein the spatial position parameters include the angle between the bisector of the central plane angle of the spray fan-shaped water pattern and the vertical plane perpendicular to the camera axis, the landing point of the bisector of the central plane angle of the spray fan-shaped water pattern on the camera surface, and the vertical distance between the nozzle head and the camera axis; adjusting the water supply pressure of the nozzles to a preset pressure range; coordinating the adjustment of the nozzle posture and installation position according to the spatial position parameters, so that the angle, landing point position, and vertical distance all fall within their respective preset value ranges; constructing a cleaning efficiency quantification model, calculating the comprehensive cleaning efficiency based on the spatial position parameters and water supply pressure, and determining the optimal arrangement parameters that simultaneously adapt to protruding and non-protruding cameras by maximizing the comprehensive cleaning efficiency.

[0006] In one possible implementation, the protruding camera includes a high-protruding camera, a medium-protruding camera, and a low-protruding camera; the non-protruding camera includes a flat camera and a concave camera.

[0007] In one possible implementation, for a protruding camera, the point where the bisector of the central plane angle of the spray fan-shaped water pattern lands on the camera surface is the height distance between the point where the bisector of the central plane angle of the spray fan-shaped water pattern lands and the root of the camera lens; for a non-protruding camera, the point where the bisector of the central plane angle of the spray fan-shaped water pattern lands on the camera surface is the distance between the point where the bisector of the central plane angle of the spray fan-shaped water pattern lands and the outermost edge of the non-glass surface of the camera surface.

[0008] In one possible implementation, the step of collaboratively adjusting the nozzle attitude and installation position according to the spatial position parameters so that the included angle, landing point position, and vertical distance all fall within their respective preset value ranges includes: the preset value range of the included angle between the bisector of the center plane of the spray fan-shaped water pattern and the vertical plane perpendicular to the camera axis satisfies a first interval; the preset value range of the landing point position of the bisector of the center plane of the spray fan-shaped water pattern on the camera surface satisfies a second interval; and the preset range of the vertical distance between the nozzle head and the camera axis satisfies a third interval.

[0009] In one possible implementation, the construction of the cleaning efficiency quantification model, which calculates the comprehensive cleaning efficiency based on the spatial location parameters and water supply pressure, includes: the cleaning efficiency quantification model is as follows: ;in, To improve overall cleaning efficiency, For the angle efficiency factor, For landing point efficiency factor, For distance efficiency factor, It is a stress factor.

[0010] In one possible implementation, the expression for the angle efficiency factor is: ;in, The angle between the bisector of the central plane angle of the spray fan-shaped water feature and the vertical plane perpendicular to the camera axis; when The expression for the angle efficiency factor is valid when the value is less than the first preset value; otherwise... .

[0011] In one possible implementation, the landing efficiency factor is expressed as: ;in, The location where the bisector of the angle between the central face of the sprayed fan-shaped water pattern lands on the camera surface; when The expression for the landing point efficiency factor is valid when it is less than or equal to the second preset value; otherwise... .

[0012] In one possible implementation, the distance efficiency factor is expressed as: ;in, The vertical distance between the nozzle head and the camera axis; when The expression for the distance efficiency factor is valid when the value is less than the third preset value; otherwise... .

[0013] In one possible implementation, the expression for the pressure factor is: The expression for the pressure factor is valid only when the water supply pressure meets the preset value range; otherwise... ;in, This refers to the water supply pressure.

[0014] The beneficial effects of this application are as follows: Based on the structural differences between protruding and non-protruding cameras, this application differentiates the landing point of the angle bisector of the central plane of the spray fan-shaped water jet on the camera surface. Combined with the characteristics of the fan-shaped water jet, it limits the reasonable range of the included angle, landing point, vertical distance, and water supply pressure, so that the water flow can accurately target the highly polluted area of ​​the camera, eliminate the cleaning blind spots existing in the traditional arrangement method, and significantly improve the uniformity and quality of mirror cleaning.

[0015] This application establishes a quantitative cleaning efficiency model, which calculates the comprehensive cleaning efficiency through multi-dimensional efficiency factors, and can objectively evaluate the merits of the nozzle arrangement scheme, thus eliminating the subjectivity and randomness of traditional manual experience-based adjustments.

[0016] This application determines the optimal arrangement parameters to simultaneously accommodate both protruding and non-protruding cameras by maximizing overall cleaning efficiency, achieving the best match between jet coverage and water flow impact force. While ensuring thorough decontamination, it effectively avoids mirror impact damage and cleaning fluid waste caused by excessive pressure, reducing cleaning energy consumption and operating costs.

[0017] This application addresses the problem that existing cleaning nozzles are mostly arranged manually based on experience, without taking into account the shape and structure of the camera, lacking unified standards, and having poor compatibility with different camera shapes. This not only results in high consumption of washing liquid and low cleaning efficiency, but also creates blind spots in the cleaning process. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a flowchart illustrating a method for arranging cleaning nozzles for an automotive camera, as provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram illustrating the types of automotive cameras provided in this application embodiment.

[0021] Figure 3 This is a schematic diagram of the landing point of the fan-shaped water spray pattern provided in the embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the arrangement of the protruding camera provided in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the landing point of the fan-shaped water spray pattern provided in the embodiment of this application.

[0024] Figure 6 This is a schematic diagram of the arrangement of a non-protruding camera provided in an embodiment of this application.

[0025] Figure 7 A comparison chart of cleaning efficiency provided for embodiments of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application 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 application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] This application provides a method for arranging cleaning nozzles for automotive cameras, such as... Figure 1 As shown, the method includes steps S101 to S105. Wherein, Figure 1 This is merely one execution order shown in the embodiments of this application and does not represent the only execution order of a method for arranging cleaning nozzles for automotive cameras. Where the final result can be achieved, Figure 1 The steps shown can be performed in parallel or in reverse order.

[0028] S101: Determine the type of car camera to be cleaned, classifying cameras into protruding cameras and non-protruding cameras.

[0029] Figure 2 This is a schematic diagram illustrating the types of automotive cameras provided in embodiments of this application. Protruding cameras include high-protrusion cameras, medium-protrusion cameras, and low-protrusion cameras. Non-protruding cameras include flat cameras and recessed cameras.

[0030] S102: Configure the spatial position parameters of the nozzle relative to the camera. The spatial position parameters include the angle between the bisector of the central plane of the spray fan-shaped water pattern and the vertical plane of the camera axis, the position of the bisector of the central plane of the spray fan-shaped water pattern on the camera surface, and the vertical distance between the nozzle head and the camera axis.

[0031] Specifically, the nozzle used in this application is a fixed fan-shaped water nozzle.

[0032] Specifically, considering the differences in camera structure and shape, the definition of the landing point needs to be differentiated as follows.

[0033] For a protruding camera, the point where the bisector of the central face of the spray fan-shaped water pattern lands on the camera surface is the height distance between the point where the bisector of the central face of the spray fan-shaped water pattern lands and the root of the camera lens.

[0034] For non-protruding cameras, the point where the bisector of the central face of the spray fan-shaped water pattern lands on the camera surface is the distance between the point where the bisector of the central face of the spray fan-shaped water pattern lands and the outermost edge of the non-glass surface of the camera.

[0035] Specifically, since the lens root of the protruding camera and the outermost edge of the non-glass surface of the non-protruding camera are the areas where dirt is most easily accumulated and most difficult to clean during vehicle operation, this application defines reference benchmarks for different camera structures to differentiate the landing point positions. This can guide the fan-shaped water flow to accurately target highly polluted areas for rinsing, effectively eliminating cleaning blind spots and ensuring that different types of cameras can obtain uniform and thorough cleaning results.

[0036] Figure 3 This is a schematic diagram of the landing point of the fan-shaped water spray pattern provided in the embodiment of this application. Figure 4 This is a schematic diagram illustrating the arrangement of the protruding camera provided in an embodiment of this application. Figure 3 and Figure 4 As shown, the fan-shaped water flow as a whole constitutes a jet fan-shaped water pattern. The central plane of the jet fan-shaped water pattern is the symmetry reference plane of the fan-shaped water pattern, and the angle bisector located within the central plane of the jet fan-shaped water pattern is the symmetry center line of the fan-shaped water pattern. The angle between the bisector of the central plane angle of the spray fan-shaped water pattern and the perpendicular plane to the camera axis. The location where the angle bisector of the central face of the sprayed fan-shaped water pattern lands on the camera surface. This is the perpendicular distance between the nozzle head and the camera axis. For a protruding camera, this refers to the point on the camera surface where the bisector of the angle between the central facet of the spray fan-shaped water pattern lands. The distance between the point where the bisector of the angle between the center plane of the spray fan-shaped water jet lands and the base of the camera lens.

[0037] Figure 5 This is a schematic diagram of the landing point of the fan-shaped water spray pattern provided in the embodiment of this application. Figure 6 This is a schematic diagram illustrating the arrangement of a non-protruding camera provided in an embodiment of this application. Figure 5 and Figure 6 As shown, The angle between the bisector of the central plane angle of the spray fan-shaped water pattern and the perpendicular plane to the camera axis. The location where the angle bisector of the central face of the sprayed fan-shaped water pattern lands on the camera surface. This is the perpendicular distance between the nozzle head and the camera axis. For non-protruding cameras, this refers to the location where the bisector of the angle between the central facet of the spray fan-shaped water pattern lands on the camera surface. The distance is the distance between the point where the bisector of the angle between the center plane of the spray fan-shaped water pattern lands and the outermost edge of the non-glass surface of the camera.

[0038] Specifically, the non-glass surface of the camera can be a housing that encloses the camera.

[0039] S103: Adjust the water supply pressure of the nozzle to the preset pressure range.

[0040] The preset pressure range for the nozzle's water supply pressure is 1.2 bar to 2.0 bar.

[0041] Specifically, this pressure range can effectively remove dust, mud, and other contaminants adhering to the camera surface, while also preventing excessive pressure from damaging the camera lens and housing, and reducing unnecessary consumption of cleaning fluid.

[0042] S104: Adjust the nozzle attitude and installation position in coordination according to the spatial position parameters so that the included angle, landing point position and vertical distance all fall within their respective preset value ranges.

[0043] The nozzle attitude and installation position are adjusted in coordination according to the spatial position parameters so that the included angle, landing point position and vertical distance all fall within their respective preset value ranges, including the following:

[0044] The preset value range of the angle between the bisector of the central plane of the spray fan-shaped water pattern and the vertical plane of the camera axis satisfies the first interval.

[0045] Specifically, the first interval is 5° to 11°.

[0046] The preset value range of the landing point of the center plane angle bisector of the spray fan-shaped water pattern on the camera surface satisfies the second interval.

[0047] Specifically, the second interval is -1mm to 1mm.

[0048] The preset range of the vertical distance between the nozzle head and the camera axis satisfies the third interval.

[0049] Specifically, the third range is 17mm to 27mm.

[0050] In practice, the nozzle posture can be adjusted using a mounting bracket. This adjustment process can be repeated iteratively until all parameters meet their respective preset value ranges.

[0051] Specifically, the preset ranges of the above parameters are determined by comprehensively considering the diffusion characteristics, coverage area, and impact effect of the fan-shaped water jet. By controlling each parameter within the corresponding range, the fan-shaped water jet can completely cover the camera cleaning area, avoiding problems such as water splashing, cleaning blind spots, insufficient impact force, or excessive impact.

[0052] Specifically, during actual debugging, an auxiliary vision system or laser pointer can be used to locate the point where the bisector of the angle between the center plane of the sprayed fan-shaped water pattern lands on the camera surface. For protruding cameras, the lens root is the junction between the protruding mirror structure and the base; for non-protruding cameras, the outermost edge of the non-glass surface (shell) is its surface boundary. The landing point location... By controlling the flow rate to around 0mm, the main body of the water flow can directly act on the key polluted area, while also coordinating with the included angle. The well-designed system allows the water flow to create an outward scouring force, effectively stripping away and carrying away surface dirt.

[0053] S105: Construct a quantitative model for cleaning efficiency, calculate the comprehensive cleaning efficiency based on spatial location parameters and water supply pressure, and determine the optimal arrangement parameters that simultaneously adapt to both protruding and non-protruding cameras by maximizing the comprehensive cleaning efficiency.

[0054] A quantitative model for cleaning efficiency is constructed, and the overall cleaning efficiency is calculated based on spatial location parameters and water supply pressure, including:

[0055] The cleaning efficiency quantification model is as follows: .in, To improve overall cleaning efficiency, For the angle efficiency factor, For landing point efficiency factor, For distance efficiency factor, It is a stress factor.

[0056] Specifically, overall cleaning efficiency The closer the value is to 1, the higher the overall cleaning efficiency; conversely, the lower the value is, the lower the overall cleaning efficiency. The closer the value is to 0, the worse the overall cleaning efficiency.

[0057] The expression for the angle efficiency factor is: .in, The angle between the bisector of the central plane of the spray fan-shaped water feature and the vertical plane perpendicular to the camera axis.

[0058] when The expression for the angle efficiency factor is valid when the value is less than the first preset value; otherwise... .

[0059] Specifically, the first preset value is 15°.

[0060] The expression for the landing point efficiency factor is: .in, The point where the angle bisector of the central face of the sprayed fan-shaped water pattern lands on the camera surface.

[0061] when The expression for the landing point efficiency factor is valid when it is less than or equal to the second preset value; otherwise... .

[0062] Specifically, the second preset value is 5mm.

[0063] The expression for the distance efficiency factor is: .in, This is the vertical distance between the nozzle head and the camera axis.

[0064] when The expression for the distance efficiency factor is valid when the value is less than the third preset value; otherwise... .

[0065] Specifically, the third preset value is 15mm.

[0066] The expression for the stress factor is: .

[0067] The expression for the pressure factor is valid when the water supply pressure meets the preset value range; otherwise... ;in, This refers to the water supply pressure.

[0068] Specifically, the preset numerical range is .

[0069] Specifically, This indicates that the value within the parentheses and 0 are taken as the maximum value, with the pressure factor limited to a minimum of 0, and negative numbers will not occur.

[0070] Specifically, when the water supply pressure of the nozzle is adjusted to the preset pressure range according to the previous steps, and the nozzle attitude and installation position are adjusted in coordination according to the spatial position parameters so that the included angle, landing point position and vertical distance all fall within their respective preset value ranges, when all parameters are adjusted to the preset range, all efficiency factors and pressure factors are effective and have values ​​greater than 0, which can ensure that the cleaning operation can be carried out normally. Only when the water supply pressure deviates from the preset pressure range and the parameters do not fall within their respective preset value ranges will a single efficiency factor return to zero and the overall cleaning efficiency drop to 0. At this time, the cleaning fails and needs to be readjusted.

[0071] Specifically, the aforementioned cleaning efficiency quantification model quantifies the impact of four key parameters—angle, landing point position, vertical distance, and water supply pressure—on the cleaning effect. The greater the deviation of the parameters from the optimal value, the lower the value of the corresponding factor, and the lower the overall cleaning efficiency. By finding the maximum value of this quantification model, the optimal arrangement parameters adapted to all types of cameras can be accurately obtained. This ensures full cleaning coverage without blind spots while maximizing cleaning efficiency, reducing cleaning fluid consumption, and improving the versatility and operational stability of the entire cleaning structure.

[0072] When the included angle, landing point, vertical distance, or water supply pressure do not fall within their respective preset value ranges, problems such as incomplete water flow coverage and severe water flow atomization will occur. According to actual tests, the camera cleaning time will increase by more than 30%.

[0073] Figure 7This is a comparison chart of cleaning efficiency provided in the embodiments of this application. The actual improvement effect of this solution can be fully verified through controlled variable control experiments. The unified experimental environment was 25±2℃ temperature and 60%RH humidity. A 3% concentration standard automotive glass cleaner was used, and a dry simulated mud and water contamination layer with an adhesion amount of 0.15g / cm² was used as the unified test stain. Blind sample comparison tests were conducted on the traditional experience layout group and the optimized layout group of this solution (total sample size n=50). The cleaning efficiency of convex cameras (convex lenses) increased from 65% to 92%, the cleaning efficiency of planar cameras (planar lenses) increased from 70% to 94%, and the cleaning efficiency of non-convex cameras (concave lenses) increased from 68% to 93%. The amount of cleaning fluid consumed per cleaning cycle was reduced from 85ml in the traditional solution to 55ml, with an average saving of 35.2% in cleaning fluid consumption. Based on an annual vehicle mileage of 20,000 kilometers and cleaning twice a week, approximately 3.1L of cleaning fluid can be saved per vehicle per year. This application significantly improves the cleaning cleanliness of various types of cameras while significantly reducing the overall vehicle consumable costs, making it more energy-efficient and environmentally friendly.

[0074] This application achieves standardized nozzle arrangement design through the coordinated constraint of parameter range and cleaning efficiency quantification model. This application enables the jet to precisely cover the camera lens area, significantly improving cleaning efficiency while reducing detergent consumption, and can be widely applied to various vehicle external camera cleaning systems.

[0075] The above embodiments are only for illustrating the technical concept and features of this application. Their purpose is to enable those skilled in the art to understand the content of this application and implement it. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be covered within the scope of protection of this application.

Claims

1. A method for arranging cleaning nozzles for automotive cameras, wherein the nozzles are fixed fan-shaped water nozzles, characterized in that, include: Determine the type of car camera to be cleaned, classifying cameras into protruding cameras and non-protruding cameras; Configure the spatial position parameters of the nozzle relative to the camera; wherein, the spatial position parameters include the angle between the bisector of the central plane of the spray fan-shaped water pattern and the vertical plane of the camera axis, the position of the landing point of the bisector of the central plane of the spray fan-shaped water pattern on the camera surface, and the vertical distance between the nozzle head and the camera axis. Adjust the water supply pressure of the nozzle to the preset pressure range; The nozzle attitude and installation position are coordinated and adjusted according to the spatial position parameters so that the included angle, landing point position and vertical distance all fall within their respective preset value ranges. A quantitative model for cleaning efficiency is constructed, and the comprehensive cleaning efficiency is calculated based on the spatial location parameters and water supply pressure. The optimal arrangement parameters for both protruding and non-protruding cameras are determined by maximizing the comprehensive cleaning efficiency. The construction of the cleaning efficiency quantification model, which calculates the comprehensive cleaning efficiency based on the spatial location parameters and water supply pressure, includes: The cleaning efficiency quantification model is as follows: ;in, To improve overall cleaning efficiency, For the angle efficiency factor, For landing point efficiency factor, This is the distance efficiency factor. As a stress factor; The expression for the angle efficiency factor is: ;in, The angle between the bisector of the central face of the spray fan-shaped water pattern and the vertical plane perpendicular to the camera axis; when The expression for the angle efficiency factor is valid when the value is less than the first preset value; otherwise... ; The expression for the landing point efficiency factor is: ;in, The location where the bisector of the angle between the center plane of the sprayed fan-shaped water pattern lands on the camera surface; when The expression for the landing point efficiency factor is valid when it is less than or equal to the second preset value; otherwise... ; The expression for the distance efficiency factor is: ;in, The vertical distance between the nozzle head and the camera axis; when The expression for the distance efficiency factor is valid when the value is less than the third preset value; otherwise... ; The expression for the stress factor is: ; The expression for the pressure factor is valid only when the water supply pressure meets the preset value range; otherwise... ;in, This refers to the water supply pressure.

2. The method for arranging cleaning nozzles for automotive cameras according to claim 1, characterized in that, The protruding camera includes a high-protruding camera, a medium-protruding camera, and a low-protruding camera; The non-protruding camera includes flat cameras and concave cameras.

3. The method for arranging cleaning nozzles for automotive cameras according to claim 1, characterized in that, For a protruding camera, the position of the bisector of the central face angle of the spray fan-shaped water pattern on the camera surface is the height distance between the bisector of the central face angle of the spray fan-shaped water pattern and the root of the camera lens. For non-protruding cameras, the point where the bisector of the central face of the spray fan-shaped water pattern lands on the camera surface is the distance between the point where the bisector of the central face of the spray fan-shaped water pattern lands and the outermost edge of the non-glass surface of the camera.

4. The method for arranging automotive camera cleaning nozzles according to claim 1, characterized in that, The step of coordinating the adjustment of the nozzle attitude and installation position according to the spatial position parameters, so that the included angle, landing point position and vertical distance all fall within their respective preset value ranges, includes: The preset value range of the angle between the bisector of the central plane of the spray fan-shaped water pattern and the vertical plane of the camera axis satisfies the first interval; The preset value range of the landing point of the center plane angle bisector of the spray fan-shaped water pattern on the camera surface satisfies the second interval; The preset range of the vertical distance between the nozzle head and the camera axis satisfies the third interval.

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