Automobile windshield low temperature defrosting and defogging performance detection device
By designing an adjustable bracket and anti-reflective housing for automotive windshield glass testing, the repeatability and accuracy issues of defrosting and defogging performance testing in low-temperature environments were solved, achieving efficient and accurate test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU ZUOZHU HOT & COLD CONTROL TECH CO LTD
- Filing Date
- 2025-04-14
- Publication Date
- 2026-06-05
AI Technical Summary
Existing methods for testing the defrosting and defogging performance of automotive windshields suffer from high operator experience dependence, poor repeatability and reproducibility in low-temperature environments, and the imaging equipment is easily affected by low temperatures, resulting in inaccurate measurement results and low efficiency.
A detection device with an adjustable bracket, a glass window, and a heating element was designed. The device includes a built-in camera and an anti-reflective coating and a light source to ensure consistent shooting angles and image clarity in low-temperature environments, thereby improving detection accuracy.
It achieves highly repeatable and reproducible defrosting and defogging performance testing in low-temperature environments, reduces the impact of frost and fog reflection, and improves measurement accuracy and efficiency.
Smart Images
Figure CN224328064U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of environmental testing, and in particular to a device for testing the low-temperature defrosting and defogging performance of automotive windshields. Background Technology
[0002] When a car is driven in rainy, snowy, or low-temperature weather, frost or fogging on the windshield can impair the driver's visibility and even lead to traffic accidents. The national standard GB11555-2009 specifically specifies the test methods and performance indicators for low-temperature defrosting and defogging systems for automotive windshields.
[0003] According to national standards, defrosting and defogging performance testing involves recording and measuring the outline and area of frost and fog remaining on a specific area of the windshield surface after defrosting and defogging for a specific time under specific conditions. This is used to measure the performance of the vehicle's defrosting and defogging system.
[0004] In existing automotive windshield defrosting and defogging tests, the recording of frost and fog outlines mainly relies on manual outlining with a pen followed by paper tracing, or using unprocessed mobile phones or cameras to capture images of the glass with frost and fog edges.
[0005] The manual outlining method relies primarily on operators drawing lines manually with a pen. When faced with rugged, frosty outlines, especially in areas with numerous fine structures, the accuracy of the measurement results is often limited by the operator's experience and judgment. Furthermore, the repeatability and reproducibility of data recorded and processed by different operators or by the same operator at different times are poor. In addition, the manual outlining and rubbing method requires time-consuming manual recording and processing of data, which is not only inefficient but also limits data analysis and processing capabilities.
[0006] This method involves capturing images of frosted / foggy edges on a mobile phone or camera without any processing, and then using computer image recognition algorithms to determine the defrosting / fogging area ratio. For example, Chinese patent CN118552600A discloses a method for detecting the defrosting / fogging area, comprising: acquiring an initial image of a car's windshield corresponding to the defrosting / fogging area; performing curvature correction processing on the initial image to obtain a test image corresponding to the defrosting / fogging area; determining at least one test area and its area in the test image; performing contour detection processing on each test area within a preset time period to obtain the defrosting / fogging contour area of the test area; and determining the defrosting / fogging area ratio of the test image in each test area based on the area and the defrosting / fogging contour area. This application allows for the prior curvature correction processing of images of various types of defrosting / fogging areas, followed by calculation of the defrosting / fogging area ratio based on the corrected image, thus improving the accuracy of defrosting / fogging area calculation.
[0007] This method improves the accuracy and efficiency of defrosting and defogging area identification compared to manual tracing and imprinting. However, it does not consider the impact of the -3℃ low-temperature environment required by the experiment on the performance of the photographing tool (camera or mobile phone), which may lead to problems such as the unprocessed camera or mobile phone freezing or reduced working time at low temperatures. In addition, car windows are highly reflective. If the influence of the test environment or measuring tool on glass reflection is not reduced, it is easy to increase image noise, reduce the contrast of frost and fog, and affect the computer's extraction of frost and fog features in the image, resulting in large deviations in the results. Utility Model Content
[0008] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0009] The technical problem to be solved by this utility model is to provide a low-temperature defrosting and defogging performance testing device for automotive windshields that has high repeatability and reproducibility and can avoid the influence of low-temperature environment on the captured images.
[0010] To solve the above-mentioned technical problems, the present invention provides a testing device for the low-temperature defrosting and defogging performance of automotive windshields, comprising:
[0011] An adjustable bracket has a connecting part 1.1 at one end and a ball joint connecting to the housing 2 at the other end, which can be adjusted and fixed at any desired angle.
[0012] The housing 2 has at least one glass window 3 on its front side and a heating element 4 inside.
[0013] The shooting device 5 is fixed in the housing 2.
[0014] Preferably, the automotive windshield low-temperature defrosting and defogging performance testing device is further improved by forming an adjustable bracket in the form of a segmented adjustable bracket.
[0015] Preferably, the improved automotive windshield low-temperature defrosting and defogging performance testing device includes a segmented adjustable bracket comprising:
[0016] The connecting part 1.1 can be fixedly installed in a designated position;
[0017] The first telescopic section 1.2 has its first end formed on the connecting part 1.1, and its second end pivotally connected to the first end of the second telescopic section 1.3;
[0018] The second telescopic section 1.3 has its second end pivotally connected to the first end of the connecting rod 1.4;
[0019] Connecting rod 1.4, its second end ball joint is connected to the bottom of housing 2.
[0020] Preferably, the automotive windshield low-temperature defrosting and defogging performance testing device is further improved, wherein the heating element 4 is arranged on at least two side walls of the housing 2.
[0021] Preferably, the automotive windshield low-temperature defrosting and defogging performance testing device is further improved by having an anti-reflective coating on the inner wall of the housing 2.
[0022] Preferably, the automotive windshield glass low-temperature defrosting and defogging performance testing device is further improved, and the glass window 3 has an anti-reflective coating;
[0023] Alternatively, the glass window 3 may be made of etched glass or low-emissivity glass.
[0024] Preferably, the automotive windshield glass low-temperature defrosting and defogging performance testing device is further improved, with the housing 2 having a heat insulation layer.
[0025] Preferably, the automotive windshield low-temperature defrosting and defogging performance testing device is further improved, with the light source arranged inside the housing 2.
[0026] Preferably, the improved automotive windshield low-temperature defrosting and defogging performance testing device further includes:
[0027] A displacement sensor is arranged on the edge of the housing 2. It is used to position the shooting device 5, thereby ensuring that the relative distance between the windshield of the tested car and the shooting device is the same after the shooting angle is changed.
[0028] Preferably, in a further improvement of the automotive windshield low-temperature defrosting and defogging performance testing device, the imaging device 5 is a camera, mobile phone or video recorder, and the heating element 4 is an electric heating tape, electric heating wire or heating film.
[0029] The working principle and technical effects of this utility model are as follows;
[0030] This utility model mainly includes: a shooting device, a box with a glass window, and a multi-section adjustable bracket; preferably, a light source and / or a position sensor are arranged inside the box. The shooting device is placed inside the box and takes pictures of the windshield of the car being tested through the glass window. The shooting device includes, but is not limited to, cameras, mobile phones, video recorders, and other devices capable of taking pictures or videos. The main structural feature of the box is that it is a container that can hold the shooting device, with an internal heating device and anti-reflective treatment, and one or more sides are covered with glass. The box can be an insulated box or a common box made of conventional metal or polymer materials. The main functional feature of the box is that it provides a space isolated from the external environment for the shooting device inside, and can work with the internal heating device to achieve a suitable temperature inside the box. The main functional feature of the internal heating device is to heat the air inside the box, and the selection includes, but is not limited to, electric heating tape, electric heating wire, and other heaters.
[0031] The method of fixing the glass to the enclosure is not limited. The main functional features of the glass are electric heating and anti-reflective functions, which can prevent the imaging resolution of the test specimen photographed by the imaging device from being affected by frost or reflection on the surface of the glass during testing. The electric heating device of the glass includes, but is not limited to, conductive film heating, conductive wire heating, and interlayer electric heating, etc. The main functional feature is to maintain its surface from frost, ice, and condensation.
[0032] Anti-reflective treatments on the enclosure's glass windows and interior walls reduce or eliminate problems such as unclear images captured by the internal photographic equipment due to external light reflections onto the glass or interior walls. Anti-reflective treatments on the enclosure glass include, but are not limited to, using anti-reflective coatings, etched glass, and low-emissivity glass. Anti-reflective treatments on the interior walls include, but are not limited to, using matte materials or coatings, lining with light-absorbing materials, and using low-reflectivity materials.
[0033] The housing in the device is placed on a support. The main function of the support is to move the housing in the test room. At the same time, the height and orientation angle of the housing are adjustable. After adjustment, the position of the housing and the internal imaging device can be stably maintained, so as to fix the shooting angle each time and increase the repeatability and reproducibility of the test results. Attached Figure Description
[0034] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:
[0035] Figure 1 This is a reference diagram showing the usage state of this utility model.
[0036] Explanation of reference numerals in the attached figures
[0037] Connecting part 1.1
[0038] First telescopic section 1.2
[0039] Second telescopic section 1.3
[0040] Linkage 1.4
[0041] Box 2
[0042] Glass window 3
[0043] Heating element 4
[0044] Filming equipment 5
[0045] 6. Car windshield glass. Detailed Implementation
[0046] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements.
[0047] First embodiment;
[0048] refer to Figure 1 As shown, this utility model provides a device for testing the low-temperature defrosting and defogging performance of automotive windshields, comprising:
[0049] An adjustable bracket has a connecting part 1.1 at one end and a ball joint connecting to the housing 2 at the other end, which can be adjusted and fixed at any desired angle.
[0050] The housing 2 has at least one glass window 3 on its front side and a heating element 4 inside; the housing 2 has a detachable side wall or an openable door for the camera equipment 5 to enter and exit.
[0051] The shooting device 5 is fixed in the housing 2. The shooting device 5 is a camera, mobile phone or video recorder.
[0052] Second embodiment;
[0053] Continue to refer to Figure 1 As shown, this utility model provides an adjustable bracket that can be used in the first embodiment described above, which is formed as a multi-segment adjustable bracket including:
[0054] Multi-section adjustable stand, made of any material, including metals such as aluminum alloy, and engineering plastics, including:
[0055] The connecting part 1.1 can be fixedly installed in a designated position;
[0056] The first telescopic section 1.2 has its first end formed on the connecting part 1.1, and its second end pivotally connected to the first end of the second telescopic section 1.3; the first telescopic section 1.2 can be in the form of a sleeve, and the length can be fixed by radial screws after the required length is reached;
[0057] The second telescopic section 1.3 is pivotally connected at its second end to the first end of the connecting rod 1.4. The second telescopic section 1.3 can be in the form of a sleeve, and the length can be fixed by radial screws after reaching the required length. Correspondingly, the pivot connection between the first telescopic section 1.2 and the second telescopic section 1.3 can be in the form of damping, or it can be fixed by screws so that the first telescopic section 1.2 and the second telescopic section 1.3 can provide any included angle.
[0058] Connecting rod 1.4, its second end ball joint is connected to the bottom of housing 2.
[0059] Alternatively, the first or second embodiment described above can be further improved by adding a heating element 4, which is arranged on at least the two side walls of the housing 2. The heating element 4 is an electric heating tape, an electric heating wire, or a heating film.
[0060] Alternatively, the first or second embodiment described above may be further improved by having an anti-reflective coating on the inner wall of the housing 2 and / or the glass window 3.
[0061] Alternatively, the glass window 3 may be made of etched glass or low-emissivity glass.
[0062] Alternatively, the first or second embodiment described above may be further improved by forming an insulation layer on the housing 2.
[0063] Alternatively, the first or second embodiment described above can be further improved by adding a light source, which is arranged inside the housing 2.
[0064] Alternatively, the first or second embodiment described above may be further improved by including a displacement sensor arranged on the edge of the housing 2 for positioning the imaging device 5.
[0065] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.
[0066] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.
Claims
1. A device for testing the low-temperature defrosting and defogging performance of automotive windshields, characterized in that, include: An adjustable bracket has a connecting part (1.1) at one end and a ball joint at the other end connected to the housing (2), which can be adjusted and fixed at any desired angle; The box (2) has at least one glass window (3) on its front side and a heating element (4) inside; The shooting equipment (5) is fixed in the box (2).
2. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: The adjustable bracket is formed as a segmented adjustable bracket.
3. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 2, characterized in that, The segmented adjustable bracket includes: a connecting part (1.1) which can be fixedly installed in a designated position; The first telescopic section (1.2) has its first end formed on the connecting part (1.1) and its second end pivotally connected to the first end of the second telescopic section (1.3); The second telescopic section (1.3) is pivotally connected at its second end to the first end of the connecting rod (1.4); The connecting rod (1.4) has a ball joint at its second end connected to the bottom of the housing (2).
4. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: Heating element (4) is arranged on at least two side walls of the housing (2).
5. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: The inner wall of the box (2) has an anti-reflective coating.
6. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: The glass window (3) has an anti-reflective coating; Alternatively, the glass window (3) is made of etched glass or low-emissivity glass.
7. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: The box (2) has an insulation layer.
8. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that, Also includes: The light source is located inside the housing (2).
9. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that, Also includes: A displacement sensor is arranged on the edge of the housing (2) and is used to position the shooting device (5).
10. The automotive windshield low-temperature defrosting and defogging performance testing device as described in claim 1, characterized in that: The shooting device (5) is a camera, mobile phone or video recorder, and the heating element (4) is an electric heating tape, electric heating wire or heating film.