Automobile front windshield transparency detection system, device and detection method

Abstract

The invention relates to the technical field of automobile part quality detection, and discloses an automobile front windshield transparency detection system, device and method. Comprising a transmission module used for transmitting the automobile front windshield to a designated position; the light source providing module is used for lighting the automobile front windshield under the condition that the transmission module transmits the automobile front windshield to a specified position; and the detection module is used for detecting the transparency of the automobile front windshield. Area array imaging is adopted to replace single-point measurement, transparency uniformity of the whole glass can be evaluated at a time, local defects can be visually found, a standard light source and a high-linearity camera are used, environmental interference is eliminated, the measurement result is stable and reliable, the metering traceability requirement is met, the detection process is automatic, one-key operation is achieved, and the measurement accuracy is high. Detection can be completed within several seconds, and whether the glass meets safety regulations or not can be determined, so that the quality inspection efficiency is greatly improved, the transmissivity distribution diagram and data of each piece of glass can be stored, and quality tracing and analysis are facilitated.

Description

Technical Field

[0001] This invention relates to the field of automotive parts quality inspection technology, specifically to an automotive windshield transparency testing system, device, and testing method. Background Technology

[0002] The visible light transmittance (i.e., transparency) of automotive windshields is a critical performance indicator related to driving safety. Regulations in various countries have mandatory requirements for it (e.g., China's GB9656 stipulates no less than 70%) to ensure clear driver visibility, especially at night and in inclement weather. Currently, testing the transparency of automotive glass faces the following problems: Limited laboratory equipment: Traditional spectrophotometers, while highly accurate, are bulky, require demanding environmental conditions, are complex to operate, and can only test small samples, making online or batch testing of finished windshields impossible. Manual assessment lacks reliability, relying entirely on subjective human judgment, failing to provide quantitative data, exhibiting poor consistency, and failing to meet regulatory compliance verification requirements. Existing portable devices lack sufficient accuracy: some simple transmittance measurements are usually single-point measurements, while automotive windshields are often curved and may have regional coloration (such as shading strips). Single-point measurements cannot represent the uniformity of the entire glass surface, easily leading to misjudgments. Due to a lack of specificity, general-purpose transmittance testing equipment does not take into account the composite structure of automotive windshields (such as PVB interlayers, antennas, electric heating wires, etc.), and its measurement spot and method may lead to distorted measurement results.

[0003] Therefore, there is an urgent need for a specialized device that can quickly, comprehensively, and quantitatively test the transparency of finished automotive windshields. Summary of the Invention

[0004] The purpose of this invention is to provide a system, device, and method for detecting the transparency of automotive windshields. This invention uses area array imaging instead of single-point measurement, enabling a one-time assessment of the transparency uniformity of the entire glass, visually identifying local defects. Using a standard light source and a high-linearity camera eliminates environmental interference, resulting in stable and reliable measurement results that meet metrological traceability requirements. The automated testing process allows for one-click operation, completing the test and issuing a judgment on whether it complies with safety regulations within seconds, greatly improving quality inspection efficiency. It can store the transmittance distribution map and data for each piece of glass, facilitating quality traceability and analysis.

[0005] To achieve the above objectives, the present invention provides a vehicle windshield transparency detection system, the detection system comprising: The transmission module is used to move the car's windshield to a designated position. A light source providing module is used to illuminate the windshield of the vehicle when the transmission module drives the windshield of the vehicle to a designated position; The detection module is used to detect the transparency of a car's windshield.

[0006] Optionally, the light source providing module includes: A linear light source is located at the bottom of the transmission module to provide light. An optical diffuser plate is vertically mounted at the bottom of the transmission module in conjunction with the linear light source.

[0007] Optionally, the light source providing module includes: A light source bracket is disposed at the bottom of the linear light source and connected to the linear light source. It is used to support the linear light source close to the transmission module to illuminate the windshield of the car.

[0008] Optionally, the detection module includes: An optical signal receiving module is used to receive the optical signal from the windshield of the car after it has been illuminated by the light source providing module. A processor, connected to the optical signal receiving module, is used to process the optical signal in order to detect the transparency of the windshield of the car. A signal processing and display module, connected to the processor, is used to display the detection results.

[0009] Optionally, the optical signal receiving module includes: A camera, mounted on top of the transmission module, is used to acquire the light signal after the linear light source penetrates the windshield of the vehicle.

[0010] On the other hand, the present invention also provides a vehicle windshield transparency detection device, the detection device comprising: The transmission module is used to move the car's windshield to a designated position. A light source providing module is used to illuminate the windshield of the vehicle when the transmission module drives the windshield of the vehicle to a designated position; The detection module is used to detect the transparency of a car's windshield.

[0011] Optionally, the light source providing module includes: A linear light source is located at the bottom of the transmission module to provide light. An optical diffuser plate is vertically mounted at the bottom of the transmission module in conjunction with the linear light source.

[0012] Optionally, the light source providing module includes: A light source bracket is disposed at the bottom of the linear light source and connected to the linear light source. It is used to support the linear light source close to the transmission module to illuminate the windshield of the car.

[0013] Optionally, the detection module includes: An optical signal receiving module is used to receive the optical signal from the windshield of the car after it has been illuminated by the light source providing module. A processor, connected to the optical signal receiving module, is used to process the optical signal in order to detect the transparency of the windshield of the car. A signal processing and display module, connected to the processor, is used to display the detection results.

[0014] Furthermore, the present invention also provides a method for detecting the transparency of an automotive windshield, the method comprising: Obtain the background brightness distribution map under a standard light source when the car windshield is not installed, as a detection benchmark; Obtain the sample brightness distribution map of the automotive windshield sample under a standard light source; The transmittance of each pixel of the car windshield is obtained by comparing the background brightness distribution map and the sample brightness distribution map pixel by pixel. The average transmittance of different areas of the automotive windshield is set according to the transmittance. Based on the average transmittance, a safe transmittance threshold is set for different areas of the vehicle windshield. Obtain the brightness distribution map of the windshield of the vehicle to be tested; The brightness distribution map is compared pixel by pixel with the background brightness distribution map to obtain the transmittance of each pixel of the car windshield. The transmittance of different areas of the windshield of the car to be tested is compared with the transmittance safety threshold, and the result of whether it is qualified is output.

[0015] Through the above technical solution, this invention provides a system, device, and method for detecting the transparency of automotive windshields. A transmission module moves the automotive windshield to a designated position, and a light source module illuminates the windshield while it is in this position. A detection module then measures the transparency of the windshield. This invention uses area array imaging instead of single-point measurement, enabling a one-time assessment of the overall transparency uniformity of the glass and direct detection of local defects. Using a standard light source and a high-linearity camera eliminates environmental interference, resulting in stable and reliable measurement results that meet metrological traceability requirements. The automated testing process allows for one-click operation, completing the test and issuing a judgment on compliance with safety regulations within seconds, significantly improving quality inspection efficiency. It can also store the transmittance distribution map and data for each piece of glass, facilitating quality traceability and analysis. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of an automotive windshield transparency detection system according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0019] In embodiments of the present invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used to describe the relative positional relationships of components in relation to the directions shown in the accompanying drawings or in relation to the vertical, perpendicular, or gravitational directions.

[0020] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] like Figure 1 The diagram shown is a schematic representation of an automotive windshield transparency detection system according to an embodiment of the present invention. Figure 1 The detection system includes a transmission module 2, a light source supply module 3, and a detection module 4. Specifically, the transmission module 2 is located on top of the bracket 1 and is used to transport the windshield of the car to a designated position. While the transmission module 2 is transporting the windshield to the designated position, a light source supply module 3 is also provided to illuminate the windshield. Furthermore, a detection module 4 is provided to detect the transparency of the windshield to determine whether the transparency of the windshield under test is acceptable.

[0022] In this embodiment, to enable the light source providing module 3 to provide a large area of ​​light, the light source providing module 3 may include a linear light source and an optical diffuser plate 32. Specifically, the linear light source 31 is disposed at the bottom of the transmission module 2 to provide the light source, and the optical diffuser plate 32 is disposed vertically at the bottom of the transmission module 2 in conjunction with the linear light source 31. In one embodiment of the present invention, the linear light source 31 is a highly stable LED linear light source with a color temperature that conforms to the human eye's visual function (approximately 5500K), and in conjunction with the optical diffuser plate 32, generates a uniform and stable beam of parallel light or diffused light to simulate ambient light during the day to illuminate the glass under test.

[0023] In this embodiment, in order to provide a stable light source to the windshield of the car, a light source bracket 33 is also provided at the bottom of the linear light source 31 and connected to the linear light source 31. This bracket supports the linear light source 31 to be close to the transmission module 2 so as to illuminate the windshield of the car and prevent the lighting effect from deteriorating due to excessive distance, which would affect the detection results.

[0024] In this embodiment, to detect the transparency of the car's windshield, the detection module 4 further includes a light signal receiving module, a processor, and a signal processing and display module. Specifically, the light signal receiving module receives the light signal from the car's windshield after being illuminated by the light source providing module 3, and obtains the light intensity distribution after the light source penetrates the windshield. The processor is connected to the light signal receiving module and processes the light signal to detect the transparency of the car's windshield, determining whether the transparency meets the requirements based on the light signal. The signal processing and display module is connected to the processor and displays the detection results, outputting whether the transparency of the car's windshield is qualified.

[0025] In this embodiment, the light signal receiving module also includes a camera 41, disposed on top of the transmission module 2, for acquiring the light signal after the linear light source 31 penetrates the windshield of the vehicle. In one example of the invention, the camera 41 may be a high-resolution, high-linearity scientific-grade CCD or CMOS camera equipped with a fixed-focus lens.

[0026] On the other hand, the present invention also provides a device for detecting the transparency of a car windshield. Specifically, the device includes a transmission module 2, a light source supply module 3, and a detection module 4. Specifically, the transmission module 2 is used to drive the car windshield to a designated position. When the transmission module 2 drives the car windshield to the designated position, a light source supply module 3 is also provided to provide light to illuminate the car windshield. A detection module 4 is also provided to detect the transparency of the car windshield to determine whether the transparency of the car windshield under test is qualified.

[0027] In this embodiment, to enable the light source providing module 3 to provide a large area of ​​light, the light source providing module 3 may include a linear light source and an optical diffuser plate 32. Specifically, the linear light source 31 is disposed at the bottom of the transmission module 2 to provide the light source, and the optical diffuser plate 32 is disposed vertically at the bottom of the transmission module 2 in conjunction with the linear light source 31. In one embodiment of the present invention, the linear light source 31 is a highly stable LED linear light source with a color temperature that conforms to the human eye's visual function (approximately 5500K), and in conjunction with the optical diffuser plate 32, generates a uniform and stable beam of parallel light or diffused light to simulate ambient light during the day to illuminate the glass under test.

[0028] In this embodiment, in order to provide a stable light source to the windshield of the car, a light source bracket 33 is also provided at the bottom of the linear light source 31 and connected to the linear light source 31. This bracket supports the linear light source 31 to be close to the transmission module 2 so as to illuminate the windshield of the car and prevent the lighting effect from deteriorating due to excessive distance, which would affect the detection results.

[0029] In this embodiment, to detect the transparency of the car's windshield, the detection module 4 further includes a light signal receiving module, a processor, and a signal processing and display module. Specifically, the light signal receiving module receives the light signal from the car's windshield after being illuminated by the light source providing module 3, and obtains the light intensity distribution after the light source penetrates the windshield. The processor is connected to the light signal receiving module and processes the light signal to detect the transparency of the car's windshield, determining whether the transparency meets the requirements based on the light signal. The signal processing and display module is connected to the processor and displays the detection results, outputting whether the transparency of the car's windshield is qualified.

[0030] In this embodiment, the light signal receiving module also includes a camera 41, disposed on top of the transmission module 2, for acquiring the light signal after the linear light source 31 penetrates the windshield of the vehicle. In one example of the invention, the camera 41 may be a high-resolution, high-linearity scientific-grade CCD or CMOS camera equipped with a fixed-focus lens.

[0031] On the other hand, the present invention also provides a method for detecting the transparency of an automotive windshield. The background brightness distribution map under a standard light source without placing the automotive windshield is obtained through a light signal receiving module as the detection reference. Then, the sample brightness distribution map of the automotive windshield sample under the standard light source is obtained. The processor performs pixel-by-pixel comparison based on the background brightness distribution map and the sample brightness distribution map to obtain the transmittance of each pixel point of the automotive windshield. The average transmittance of different regions of the automotive windshield is set according to the transmittance. The transmittance safety threshold of different regions of the automotive windshield is set according to the average transmittance. The brightness distribution map of the automotive windshield to be detected is obtained, and pixel-by-pixel comparison is performed between the brightness distribution map and the background brightness distribution map to obtain the transmittance of each pixel point of the automotive windshield. The transmittance of different regions of the automotive windshield to be detected is compared with the transmittance safety threshold, and the result of whether it is qualified is output.

[0032] Through the above technical solutions, the present invention provides a system, device and method for detecting the transparency of an automotive windshield. The automotive windshield is transmitted to a designated position through the transmission module 2. When the transmission module 2 transmits the automotive windshield to the designated position, the light source providing module 3 illuminates the automotive windshield, and the detection module 4 detects the transparency of the automotive windshield. The present invention uses area array imaging instead of single-point measurement, can evaluate the transparency uniformity of the entire glass at one time, intuitively discovers local defects, uses a standard light source and a high linearity camera, eliminates environmental interference, the measurement result is stable and reliable, meets the requirements of metrological traceability, has an automated detection process, one-key operation, can complete the detection and issue a judgment on whether it conforms to safety regulations within seconds, greatly improves the quality inspection efficiency, can store the transmittance distribution map and data of each piece of glass, and is convenient for quality traceability and analysis.

[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. Including any suitable combination of each specific technical feature. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods. But these simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A system for detecting the transparency of automotive windshields, characterized in that, The detection system includes: The transmission module is used to move the car's windshield to a designated position. A light source providing module is used to illuminate the windshield of the vehicle when the transmission module drives the windshield of the vehicle to a designated position; The detection module is used to detect the transparency of a car's windshield.

2. The detection system according to claim 1, characterized in that, The light source providing module includes: A linear light source is located at the bottom of the transmission module to provide light. An optical diffuser plate is vertically mounted at the bottom of the transmission module in conjunction with the linear light source.

3. The detection system according to claim 2, characterized in that, The light source providing module includes: A light source bracket is disposed at the bottom of the linear light source and connected to the linear light source. It is used to support the linear light source close to the transmission module to illuminate the windshield of the car.

4. The detection system according to claim 1, characterized in that, The detection module includes: An optical signal receiving module is used to receive the optical signal from the windshield of the car after it has been illuminated by the light source providing module. A processor, connected to the optical signal receiving module, is used to process the optical signal in order to detect the transparency of the windshield of the car. A signal processing and display module, connected to the processor, is used to display the detection results.

5. The detection system according to claim 4, characterized in that, The optical signal receiving module includes: A camera, mounted on top of the transmission module, is used to acquire the light signal after the linear light source penetrates the windshield of the vehicle.

6. A device for detecting the transparency of a car windshield, characterized in that, The detection device includes: The transmission module is used to move the car's windshield to a designated position. A light source providing module is used to illuminate the windshield of the vehicle when the transmission module drives the windshield of the vehicle to a designated position; The detection module is used to detect the transparency of a car's windshield.

7. The detection device according to claim 6, characterized in that, The light source providing module includes: A linear light source is located at the bottom of the transmission module to provide light. An optical diffuser plate is vertically mounted at the bottom of the transmission module in conjunction with the linear light source.

8. The detection device according to claim 7, characterized in that, The light source providing module includes: A light source bracket is disposed at the bottom of the linear light source and connected to the linear light source. It is used to support the linear light source close to the transmission module to illuminate the windshield of the car.

9. The detection device according to claim 6, characterized in that, The detection module includes: An optical signal receiving module is used to receive the optical signal from the windshield of the car after it has been illuminated by the light source providing module. A processor, connected to the optical signal receiving module, is used to process the optical signal in order to detect the transparency of the windshield of the car. A signal processing and display module, connected to the processor, is used to display the detection results.

10. A method for detecting the transparency of a car windshield, characterized in that, The detection method includes: Obtain the background brightness distribution map under a standard light source when the car windshield is not installed, as a detection benchmark; Obtain the sample brightness distribution map of the automotive windshield sample under a standard light source; The transmittance of each pixel of the car windshield is obtained by comparing the background brightness distribution map and the sample brightness distribution map pixel by pixel. The average transmittance of different areas of the automotive windshield is set according to the transmittance. Based on the average transmittance, a safe transmittance threshold is set for different areas of the vehicle windshield. Obtain the brightness distribution map of the windshield of the vehicle to be tested; The brightness distribution map is compared pixel by pixel with the background brightness distribution map to obtain the transmittance of each pixel of the car windshield. The transmittance of different areas of the windshield of the car to be tested is compared with the transmittance safety threshold, and the result of whether it is qualified is output.

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