Windshield glass defrosting and demisting detection device

Abstract

The invention discloses a windshield glass defrosting and demisting detection device which comprises a frost and mist simulator. The frost and fog simulator comprises cylindrical glass, a shading piece, a first driving device, a temperature controller, a first shell and a light source, the light source is arranged in the first shell, the first shell is provided with a light-passing window, the cylindrical glass is installed on the light-passing window, the light source obliquely irradiates on the cylindrical glass, and the axis of the cylindrical glass and the irradiation direction of the light source are parallel to the same plane. The anti-dazzling screen is attached to the cylindrical glass, a strip-shaped light hole is formed in the anti-dazzling screen, the first driving device drives the anti-dazzling screen to move along the cylindrical glass, and the temperature controller is used for adjusting the temperature in the shell; a detector; the detector comprises a second shell, a focusing lens, a photosensitive element and a second driving device, the focusing lens, the photosensitive element and the second driving device are arranged in the shell, the axis of the focusing lens and the axis of cylindrical glass are parallel to the same plane, and the second driving device drives the focusing lens to move in the light inlet direction. The interference of a light source can be effectively prevented, and the detection accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile defrosting and defogging detection technology, and in particular to a windshield defrosting and defogging detection device. Background Art

[0002] In the design and manufacturing process of modern automobiles, the defrosting and defogging system of the windshield is an important part of ensuring driving safety. The system can quickly remove frost and fog on the windshield under adverse weather conditions, such as rain, snow, fog and haze, to ensure the driver's clear vision, thereby reducing the risk of traffic accidents. However, with the continuous development of automobile technology, the performance and efficiency requirements of the defrosting and defogging system are also increasing. At present, many automobile manufacturers usually use actual climatic conditions to test the defrosting and defogging systems. Due to the variability of natural climate, the test results are often difficult to reproduce and standardize. In addition, when testing the defrosting and defogging effects, the direct and reflected light sources often interfere with the test results, affecting the accuracy and reliability of the test. Existing testing equipment often finds it difficult to effectively isolate light source interference, resulting in deviations in the test results. Summary of the invention

[0003] In view of the above-mentioned prior art, the present invention provides a windshield defrosting and defogging detection device, which can effectively prevent the interference of light sources and improve the accuracy of detection.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] A windshield defrosting and defogging detection device comprises a frost and fog simulator; the frost and fog simulator comprises a cylindrical glass, a shading sheet, a first driving device, a temperature controller, a first shell and a light source, the light source is arranged in the first shell, the first shell is provided with a light-transmitting window, the cylindrical glass is mounted on the light-transmitting window, the light source is obliquely irradiated on the cylindrical glass, the axis of the cylindrical glass and the irradiation direction of the light source are parallel to the same plane, the shading sheet is attached to the cylindrical glass, the shading sheet is provided with a strip-shaped light-transmitting hole, the first driving device drives the shading sheet to move along the cylindrical glass, and the temperature controller is used to Regulating the temperature inside the shell; a detector; the detector comprises a second shell and a focusing lens, a photosensitive element and a second driving device arranged in the shell, the axis of the focusing lens and the axis of the cylindrical glass are parallel to the same plane, the second driving device drives the focusing lens to move along the direction of light input, and the light forms an image on the photosensitive element after passing through the focusing lens; when the first driving device drives the shading plate to move forward, the second driving device synchronously drives the focusing lens to move forward, and the light passing through the shading plate irradiates the frost on the cylindrical glass and then passes through the focusing lens to form a pattern on the photosensitive element.

[0006] Furthermore, the cylindrical glass includes inner glass and outer glass, the inner glass is bonded to the outer glass, the thickness of the inner glass is greater than the thickness of the outer glass, the outer glass is connected to the first shell via a spring, the edges of the inner glass and / or the outer glass are provided with chamfers, the shading sheet is aligned with the chamfers, and the first driving device drives the shading sheet to enter between the inner glass and the outer glass from the chamfers.

[0007] Furthermore, the first driving device includes a track, a U-shaped sliding frame, a threaded rod and a first stepper motor. The track is installed in the first shell, the U-shaped sliding frame is slidably connected to the track, the two sides of the shading sheet are connected to the U-shaped sliding frame, the U-shaped sliding frame is provided with a threaded hole matching the threaded rod, and the threaded rod is connected to the first stepper motor.

[0008] Furthermore, the second driving device includes a lens barrel, a threaded ring, a gear ring, a gear and a second stepping motor. One end of the lens barrel is slidably connected to the second shell, and the other end is provided with an external thread. The external thread is threadably matched with the threaded ring. The threaded ring is provided with the gear ring. The gear ring is meshed with the gear, and the gear is connected to the second stepping motor.

[0009] Furthermore, the first stepper motor, the second stepper motor and the photosensitive element are connected to the controller signal.

[0010] Furthermore, the light source includes an LED lamp and a light-transmitting plate glass, the LED lamp irradiates the cylindrical glass after passing through the light-transmitting plate glass, the inner glass is provided with a horizontal grating, and the light-transmitting plate glass is provided with a vertical grating.

[0011] Furthermore, the shading sheet, the first shell and the second shell are all black.

[0012] Furthermore, it also includes a lightless laboratory, in which the frost and fog simulator and the detector are arranged.

[0013] The beneficial effects of the present invention are:

[0014] The temperature inside the first shell is lowered by a temperature controller, and frost fog gradually forms on the outer surface of the cylindrical glass. The light emitted by the light source is obliquely irradiated onto the cylindrical glass, and the focusing lens and the photosensitive element are not on the path of straight-line propagation and reflection of the light. Only the light reflected by the frost fog on the cylindrical glass passes through the focusing lens and is received by the photosensitive element to form an image. The light directly emitted by the light source and the light reflected by the mirror surface of the cylindrical glass will not enter the focusing lens, so that the frost fog formed on the cylindrical glass forms a sharp contrast, and the frost fog situation can be easily judged. The first driving device and the second driving device of the present invention work simultaneously, the first driving device controls the position through which the light passes, and the second driving device controls the focusing lens to form an image on the photosensitive element, so that the frost fog at different positions is imaged on the photosensitive element in sequence. When performing frost fog detection, the present invention can effectively prevent interference from the light source and improve the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a windshield defrosting and defogging detection device in an embodiment of the present application;

[0016] Figure 2 This is a schematic diagram of the structure of the U-shaped sliding frame and the shielding sheet in the embodiment of the present application;

[0017] Description of Figure Numbers:

[0018] 1. Frost simulator; 2. Cylindrical glass; 3. Shade sheet; 4. First drive device; 5. Temperature controller; 6. First shell; 7. Second shell; 8. Light source; 9. Light window; 10. Light-transmitting hole; 11. Focusing lens; 12. Photosensitive element; 13. Second drive device; 14. Inner glass; 15. Outer glass; 16. Track; 17. U-shaped sliding frame; 18. Threaded rod; 19. First stepper motor; 20. Lens barrel; 21. Threaded ring; 22. Gear ring; 23. Gear; 24. Second stepper motor; 25. Light-transmitting plate. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0020] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0021] Please refer to the attached Figures 1-2 The present application provides a windshield defrosting and defogging detection device, comprising

[0022] Frost fog simulator 1; the frost fog simulator 1 is used to simulate the formation of frost fog on the windshield, the frost fog simulator 1 includes a cylindrical glass 2, a shading plate 3, a first driving device 4, a temperature controller 5, a first shell 6 and a light source 8, the light source 8 is arranged in the first shell 6, the first shell 6 is provided with a light-through window 9, light can pass through the window, the cylindrical glass 2 is installed on the light-through window 9, the cylindrical glass 2 is used to form frost fog, and the two sides of the principle axis of the cylindrical glass 2 are bent in the direction close to the detector, so that the images on both sides can also effectively form a clear image on the photosensitive element 12. The light source 8 is irradiated obliquely onto the cylindrical glass 2. During the propagation process, the light passing through the cylindrical glass 2 and reflected by the cylindrical glass 2 does not enter the focusing lens 11 and the photosensitive element 12. The axis of the cylindrical glass 2 and the irradiation direction of the light source 8 are parallel to the same plane. The shading sheet 3 is attached to the cylindrical glass 2. The shading sheet 3 is provided with a strip-shaped light-transmitting hole 10. The light passes through the light-transmitting hole 10 and irradiates on the frost of the cylindrical glass 2. The first driving device 4 drives the shading sheet 3 to move along the cylindrical glass 2. The temperature controller 5 is used to adjust the temperature in the housing.

[0023] Detector; the detector comprises a second housing 7 and a focusing lens 11, a photosensitive element 12 and a second driving device 13 arranged in the housing, the axis of the focusing lens 11 and the axis of the cylindrical glass 2 are parallel to the same plane, the light passing through the light-transmitting hole 10 is reflected by the frost and fog and then focused by the focusing lens 11, and an image is formed on the photosensitive element 12, the second driving device 13 drives the focusing lens 11 to move along the light-incoming direction to adjust the focal length, so that the frost and fog on the cylindrical mirror can be clearly imaged on the photosensitive element 12, and the light forms an image on the photosensitive element 12 after passing through the focusing lens 11;

[0024] When the first driving device 4 drives the shading plate 3 to move forward, the second driving device 13 synchronously drives the focusing lens 11 to move forward. The light passing through the shading plate 3 irradiates the frost on the cylindrical glass 2 and then passes through the focusing lens 11 to form a pattern on the photosensitive element 12.

[0025] During the test, the test vehicle, frost fog simulator 1 and detector are placed in a lightless environment to prevent the surrounding environment from affecting the test results. The temperature inside the first shell 6 is lowered by the temperature controller 5, and frost fog gradually forms on the outer surface of the cylindrical glass 2. The light emitted by the light source 8 is obliquely irradiated on the cylindrical glass 2. The focusing lens 11 and the photosensitive element 12 are not on the path of straight-line propagation and reflection of the light. Only the light reflected by the frost fog on the cylindrical glass 2 passes through the focusing lens 11 and is received by the photosensitive element 12 to form an image. The light directly emitted by the light source 8 and the light reflected by the mirror surface of the cylindrical glass 2 will not enter the focusing lens 11, so that the frost fog formed on the cylindrical glass 2 forms a sharp contrast, and the frost fog situation can be easily judged.

[0026] During the detection process, the defrosting fog function of the test vehicle is turned on, and the cylindrical glass 2 of the frost fog simulator 1 is defrosted by the test vehicle. After the defrosting fog has worked for a period of time, it is turned off, and then the detector is used to detect and judge the effect of the defrosting fog. The first driving device 4 and the second driving device 13 work simultaneously, the first driving device 4 controls the position where the light passes through, and the second driving device 13 controls the focusing lens 11 to image the image on the photosensitive element 12, so that the frost fog at different positions is imaged on the photosensitive element 12 in sequence. When performing frost fog detection, the present invention can effectively prevent the interference of the light source 8 and improve the accuracy of detection.

[0027] Specifically, the cylindrical glass 2 includes an inner glass 14 and an outer glass 15, and the inner glass 14 is bonded to the outer glass 15. The thickness of the combination of the inner glass 14 and the outer glass 15 can be the same as the thickness of the front windshield, which can more accurately detect the defrosting and defoggering effect. The thickness of the inner glass 14 is greater than the thickness of the outer glass 15. The outer glass 15 is connected to the first shell 6 through a spring. The edges of the inner glass 14 and / or the outer glass 15 are provided with chamfers, and the shading sheet 3 is aligned with the chamfers. The first driving device 4 drives the shading sheet 3 from the chamfer to enter between the inner glass 14 and the outer glass 15, and the shading sheet 3 is clamped by the inner glass 14 and the outer glass 15, so that the shading sheet 3 is bonded to the inner surface of the outer glass 15. The thickness of the outer glass 15 is relatively small, so that the shading sheet 3 can be closer to the frost and fog layer of the cylindrical glass 2, thereby improving the accuracy of detection. Chamfers are provided at the edges of the inner glass 14 and the outer glass 15, and the shading sheet 3 can enter between the chamfers of the two glasses and squeeze the spring. After the shading sheet 3 is moved out, the spring pushes the inner glass 14 to fit with the outer glass 15.

[0028] Specifically, the first driving device 4 includes a track 16, a U-shaped sliding frame 17, a threaded rod 18 and a first stepping motor 19. The track 16 is installed in the first housing 6. The U-shaped sliding frame 17 is slidably connected to the track 16. Both sides of the light shielding sheet 3 are connected to the U-shaped sliding frame 17. The U-shaped sliding frame 17 is provided with a threaded hole matched with the threaded rod 18. The threaded rod 18 is connected to the first stepping motor 19. The U-shaped sliding frame 17 can slide along the slide rail. When the first stepping motor 19 drives the threaded rod 18 to rotate, the U-shaped sliding frame 17 is pushed to move, thereby driving the light shielding sheet 3 to enter or move out of the cylindrical glass 2.

[0029] Specifically, the second driving device 13 includes a lens barrel 20, a threaded ring 21, a gear ring 22, a gear 23, and a second stepping motor 24. One end of the lens barrel 20 is slidably connected to the second housing 7, and the other end is provided with an external thread, which is threadedly matched with the threaded ring 21. The threaded ring 21 is provided with the gear ring 22, which is meshed with the gear 23, and the gear 23 is connected to the second stepping motor 24. When the second stepping motor 24 rotates, it drives the gear 23 to rotate, and the gear 23 then drives the gear ring 22 and the threaded ring 21 to rotate. Since the threaded ring 21 is matched with the external thread of the lens barrel 20, the lens barrel 20 can be driven to move forward and backward.

[0030] Specifically, the first stepper motor 19, the second stepper motor 24 and the photosensitive element 12 are connected to the controller signal. The controller controls the coordinated action of the first stepper motor 19 and the second stepper motor 24 to accurately adjust the position of the shading sheet 3 and the focus lens 11.

[0031] Specifically, the light source 8 includes an LED lamp and a light-transmitting plate 25 glass. The LED lamp irradiates the cylindrical glass 2 after passing through the light-transmitting plate 25 glass. The inner glass 14 is provided with a horizontal grating, and the light-transmitting plate 25 glass is provided with a vertical grating. After the light source 8 passes through the horizontal grating and the vertical grating, part of the obliquely irradiated light can be filtered out, thereby reducing light pollution during the detection process.

[0032] Specifically, the light shielding sheet 3, the first shell 6 and the second shell 7 are all black, which can absorb unnecessary light and reduce light pollution during the detection process.

[0033] Specifically, it also includes a lightless laboratory, in which the frost and fog simulator 1 and the detector are arranged to reduce light pollution in the detection process.

[0034] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A windshield defrosting and defogging detection device, characterized in that: include A frost and fog simulator; the frost and fog simulator comprises a cylindrical glass, a shading sheet, a first driving device, a temperature controller, a first shell and a light source, the light source is arranged in the first shell, the first shell is provided with a light-transmitting window, the cylindrical glass is mounted on the light-transmitting window, the light source is obliquely irradiated on the cylindrical glass, the axis of the cylindrical glass and the irradiation direction of the light source are parallel to the same plane, the shading sheet is attached to the cylindrical glass, the shading sheet is provided with a strip-shaped light-transmitting hole, the first driving device drives the shading sheet to move along the cylindrical glass, and the temperature controller is used to adjust the temperature in the shell; Detector; the detector comprises a second housing and a focusing lens, a photosensitive element and a second driving device arranged in the housing, the axis of the focusing lens and the axis of the cylindrical glass are parallel to the same plane, the second driving device drives the focusing lens to move along the light input direction, and the light forms an image on the photosensitive element after passing through the focusing lens; When the first driving device drives the shading plate to move forward, the second driving device synchronously drives the focusing lens to move forward. The light passing through the shading plate irradiates the frost on the cylindrical glass and then passes through the focusing lens to form a pattern on the photosensitive element.

2. A windshield defrosting and defogging detection device according to claim 1, characterized in that: The cylindrical glass includes an inner glass and an outer glass, the inner glass is bonded to the outer glass, the thickness of the inner glass is greater than the thickness of the outer glass, the outer glass is connected to the first shell via a spring, the edges of the inner glass and / or the outer glass are provided with chamfers, the shading sheet is aligned with the chamfers, and the first driving device drives the shading sheet to enter between the inner glass and the outer glass from the chamfers.

3. A windshield defrosting and defogging detection device according to claim 1, characterized in that: The first driving device includes a track, a U-shaped sliding frame, a threaded rod and a first stepper motor. The track is installed in the first shell. The U-shaped sliding frame is slidably connected to the track. The two sides of the shading sheet are connected to the U-shaped sliding frame. The U-shaped sliding frame is provided with a threaded hole that cooperates with the threaded rod. The threaded rod is connected to the first stepper motor.

4. A windshield defrosting and defogging detection device according to claim 1, characterized in that: The second driving device includes a lens barrel, a threaded ring, a gear ring, a gear and a second stepping motor. One end of the lens barrel is slidably connected to the second shell, and the other end is provided with an external thread, which is threadedly matched with the threaded ring. The threaded ring is provided with the gear ring, which is meshed with the gear, and the gear is connected to the second stepping motor.

5. The windshield defrosting and defogging detection device according to claim 1, characterized in that: The first stepper motor, the second stepper motor and the photosensitive element are connected to the controller signal.

6. A windshield defrosting and defogging detection device according to claim 1, characterized in that: The light source comprises an LED lamp and a light-transmitting plate glass. The LED lamp irradiates the cylindrical glass after passing through the light-transmitting plate glass. The inner glass is provided with a horizontal grating, and the light-transmitting plate glass is provided with a vertical grating.

7. A windshield defrosting and defogging detection device according to claim 1, characterized in that: The shading sheet, the first shell and the second shell are all black.

8. The windshield defrosting and defogging detection device according to claim 1, characterized in that: It also includes a lightless laboratory, in which the frost and fog simulator and the detector are arranged.

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