Automobile part curvature detection device

Abstract

The invention relates to the technical field of curved surface detection, and discloses an automobile part curvature detection device which comprises a supporting mechanism arranged on a base, and curved glass is arranged in a glass frame; the laser scanning head is arranged on the base, is positioned below the curved glass and is used for scanning and detecting the curved glass; the shielding mechanisms are symmetrically arranged on the upper side and the lower side of the curved glass and used for forming a separation cavity with the curved glass; the spraying mechanism is arranged on the side face of the curved glass and used for spraying water mist into the partition cavity; and the scraping mechanism is arranged on the side surface of the curved glass. According to the automobile part curvature detection device, the shielding mechanism is respectively unfolded, so that a separation cavity is formed between the curved glass and the shielding mechanism, water mist is sprayed into the separation cavity through the spraying mechanism, the upper surface and the lower surface of the curved glass are sequentially covered with the water mist, and then the flatness and the curvature of the upper surface and the lower surface of the curved glass are respectively detected through the laser scanning head; the optical characteristics of the glass surface are changed by the water mist layer, so that the laser detection effect is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of curved surface detection, and in particular to a curvature detection device for automobile parts. Background Art

[0002] Traditional methods for testing automotive curved glass have gradually revealed their limitations due to low efficiency and insufficient precision, especially when facing transparent curved glass, where conventional testing methods are difficult to achieve satisfactory results. The main reason is that transparent glass will cause total reflection when illuminated by a light source, which makes the technology that relies on laser reflection for testing face challenges. If most of the laser is transmitted or completely reflected, the reflected light signal will be greatly reduced, which will eventually affect the detection accuracy.

[0003] In order to overcome this problem and improve the accuracy of detection, it is usually necessary to apply a reflective layer on the glass surface. This layer can reduce the transmitted light and increase diffuse reflection, thereby improving the reliability and accuracy of the laser detection device. However, this method also introduces new processes. For example, it is necessary to remove attached substances after detection, such as sprayed dust films, which increases the complexity of the production process.

[0004] With the continuous advancement of science and technology, new detection technologies such as video and 3D scanning are gradually being applied to the field of automotive glass inspection. These technologies can provide more comprehensive and accurate data support, greatly improving the efficiency and accuracy of inspection. These technologies can be combined with the addition of a glass reflective layer to further optimize the inspection method of transparent curved glass. Summary of the invention

[0005] In view of the above problems in the prior art, a device for detecting the curvature of automobile parts is proposed.

[0006] The present application provides a device for detecting curvature of automobile parts, the purpose of which is to solve the problem that the detection accuracy is affected by transmission when the glass curved surface quality is detected by laser reflection.

[0007] The technical solution of the present invention is: a device for detecting curvature of automobile parts, comprising a base, and further comprising:

[0008] A supporting mechanism is arranged on the base and is used to support a glass frame, and the curved glass is placed in the glass frame;

[0009] A laser scanning head is arranged on the base and located below the curved glass, and is used for scanning and detecting the curved glass;

[0010] The shielding mechanism is symmetrically arranged on the upper and lower sides of the curved glass to form a partition between the curved glass and the curved glass;

[0011] A spray mechanism, arranged on the side of the curved glass, for spraying water mist into the compartment;

[0012] The scraping mechanism is arranged on the side of the curved glass and is used for scraping off the water mist on the curved glass.

[0013] By adopting the above scheme, the shielding mechanisms are separately deployed to form a cavity between the curved glass and the shielding mechanism, and water mist is sprayed into the cavity by the spray mechanism so that the upper and lower surfaces of the curved glass are successively covered with water mist. Then, the flatness and curvature of the upper and lower surfaces of the curved glass are respectively detected by the laser scanning head, and the optical properties of the glass surface are changed by relying on the water mist layer, thereby enhancing the effect of laser detection.

[0014] Furthermore, the supporting mechanism includes a plurality of limit columns, top supports and extrusion members arranged on the base, the limit columns are in contact with the side of the glass frame, the top supports are in contact with the lower end surface of the glass frame, and the extrusion members are in extrusion contact with the side of the glass frame.

[0015] By adopting the above solution, a supporting mechanism is provided to restrict the glass frame in multiple degrees of freedom, so as to fix the curved glass and facilitate detection.

[0016] Furthermore, the shielding mechanism includes a pair of mounting plates, the distance between the pair of mounting plates exceeds the width of the glass frame, a pair of sliding rods arranged between the pair of mounting plates, and several sliding plates slidably arranged on the pair of sliding rods, two connecting plates are hinged between adjacent sliding plates, and the two connecting plates are hinged, and also includes a turntable 1 arranged on the mounting plate on one side, a driving motor 1 arranged on the mounting plate on the other side, a turntable 2 arranged on the main shaft of the driving motor 1, and a transmission belt mounted on the turntable 1 and the turntable 2, the transmission belt slides through the mounting plate and the sliding plate, one side of the transmission belt is fixedly connected to one of the sliding plates on one side through a fixing ring, and the mounting plates on the pair of shielding mechanisms are connected to the base through a vertical plate.

[0017] By adopting the above scheme, a shielding mechanism is provided so that the shielding mechanism forms compartments on the upper and lower sides of the curved glass respectively after being unfolded, so that when the spray mechanism sprays water mist, the water mist can be concentrated and cover the surface of the curved glass to form a water mist layer.

[0018] Furthermore, the spray mechanism includes a pair of branch pipes arranged on the side of the glass frame, a main pipe connected to the pair of branch pipes, an electromagnetic three-way valve arranged at the connection between the main pipe and the pair of branch pipes, and an atomizing nozzle arranged on the pair of branch pipes, and the atomizing nozzle is directly facing the pair of compartments.

[0019] By adopting the above scheme, a spray mechanism is provided to atomize water and spray it evenly on the upper and lower surfaces of the curved glass to form a water mist layer, thereby temporarily changing the surface characteristics of the glass through physical methods to facilitate more effective optical inspection.

[0020] Furthermore, the scraping mechanism includes a slide rail arranged on the base, the slide rail is parallel to the side of the glass frame, a slide motor is arranged on the slide rail, an upper scraper is tightly arranged on the upper surface of the curved glass, and a lower scraper is tightly arranged on the lower surface of the curved glass. The upper scraper and the lower scraper are connected to the slide motor through a U-shaped bracket.

[0021] By adopting the above scheme, a scraping mechanism is provided to clean both sides of the curved glass before spraying water mist, so as to clean the dust and water mist on the detection surface and the opposite side of the detection surface, increase the water mist adhesion of the detection surface, and improve the detection accuracy.

[0022] Furthermore, sponge scrapers are provided on the upper scraper and the lower scraper.

[0023] By adopting the above solution, the sponge scraper is provided to absorb water mist while removing dust.

[0024] Furthermore, a surface of the plurality of connecting plates opposite to the curved glass is covered with a hydrophobic film.

[0025] By adopting the above scheme, a hydrophobic film is provided so that the surface of the shielding mechanism opposite to the curved glass after being unfolded becomes a hydrophobic layer, thereby increasing the probability of water mist adhering to the curved glass and facilitating the formation of a water mist layer.

[0026] Furthermore, the laser scanning heads are provided in plurality and are used to collect the curvature values ​​of multiple points of the curved glass.

[0027] With the above solution, data acquired by multiple scanning heads can be cross-validated to improve the reliability and accuracy of the data. Data from multiple different angles can be used to build a more accurate three-dimensional model to reflect the actual curvature and shape.

[0028] Beneficial effects of the present invention:

[0029] By separately unfolding the shielding mechanisms, a cavity is formed between the curved glass and the shielding mechanisms, and water mist is sprayed into the cavity through the spray mechanism, so that the upper and lower surfaces of the curved glass are successively covered with water mist. The flatness and curvature of the upper and lower surfaces of the curved glass are then detected by a laser scanning head, and the optical properties of the glass surface are changed by relying on the water mist layer, thereby enhancing the effect of laser detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A three-dimensional diagram of a curvature detection device for automobile parts according to the present invention;

[0031] Figure 2 For the present invention Figure 1 Other perspectives of

[0032] Figure 3 An exploded view of the curvature detection device for automobile parts of the present invention;

[0033] Figure 4 A three-dimensional diagram of the shielding mechanism of the curvature detection device for automobile parts of the present invention;

[0034] Figure 5 For the present invention Figure 4 Other perspectives of

[0035] Figure 6 A three-dimensional diagram of the spray mechanism of the curvature detection device for automobile parts of the present invention;

[0036] Figure 7 It is a three-dimensional diagram of the scraping mechanism of the curvature detection device for automobile parts of the present invention.

[0037] In the figure:

[0038] 1. Base; 2. Glass frame; 3. Curved glass; 4. Laser scanning head; 5. Shielding mechanism; 6. Spray mechanism; 7. Scraping mechanism; 8. Limiting column; 9. Top support; 10. Extrusion member; 11. Mounting plate; 12. Slide rod; 13. Sliding plate; 14. Connecting plate; 15. Turntable 1; 16. Driving motor 1; 17. Turntable 2; 18. Transmission belt; 19. Fixed ring; 20. Vertical plate; 21. Branch pipe; 22. Main pipe; 23. Solenoid three-way valve; 24. Atomizing nozzle; 25. Slide rail; 26. Slide motor; 27. Upper scraper; 28. Lower scraper; 29. ​​U-shaped bracket; 30. Sponge scraper. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] Example, see Figure 1-7 In the present embodiment, a device for detecting curvature of automobile parts is provided, including a base 1, and also including a supporting mechanism, which is arranged on the base 1 and is used to support a glass frame 2, and a curved glass 3 is placed in the glass frame 2; a laser scanning head 4, which is arranged on the base 1 and is located below the curved glass 3, and is used to scan and detect the curved glass 3; a shielding mechanism 5, which is symmetrically arranged on the upper and lower sides of the curved glass 3, and is used to form a cavity between the shielding mechanism 5 and the curved glass 3; a spraying mechanism 6, which is arranged on the side of the curved glass 3, and is used to spray water mist into the cavity; a scraping mechanism 7, which is arranged on the side of the curved glass 3, and is used to scrape off the water mist on the curved glass 3.

[0041] Specifically, this embodiment forms a water mist layer on both sides of the curved glass 3 in succession, and scans the water mist layer through the laser scanning head 4 to achieve detection of both sides of the curved glass 3. When detecting one side, a water mist layer is formed on the side, and the opposite side is guaranteed to be clean and free of water mist. The same is true when detecting the opposite side. In order to accurately measure the optical properties and reflection changes corrected by the water mist layer, keeping the other side clean can avoid unnecessary light scattering and absorption, which will increase the measurement error; the formation of water mist on one side will produce a certain optical contrast effect, which helps to highlight surface defects or unevenness; if there is dirt or impurities on the opposite side, these defects may be covered up and the effectiveness of the detection may be reduced. The detection equipment needs a clear field of view or contact surface when operating to provide accurate measurement data. In particular, when detecting the upper surface, the laser needs to pass through the lower surface of the curved glass 3. If the glass surface is not clean, it may cause the equipment detection sensitivity to decrease or interfere with the operation of the equipment.

[0042] In this embodiment, the curved glass 3 is a car sunroof glass. In other possible embodiments, the curved glass 3 may also be a car windshield or a car door glass.

[0043] By unfolding the shielding mechanism 5, a cavity is formed between the curved glass 3 and the shielding mechanism 5, and water mist is sprayed into the cavity by the spraying mechanism 6, so that the upper and lower surfaces of the curved glass 3 are covered with water mist in turn, and then the flatness and curvature of the upper and lower surfaces of the curved glass 3 are detected by the laser scanning head 4, and the optical properties of the glass surface are changed by the water mist layer, so as to enhance the effect of laser detection, specifically: increase diffuse reflection, the water mist layer is composed of many small water droplets, and these water droplets can form an irregular layer on the glass surface, so that the laser beam is diffusely reflected when passing through this layer, and the diffuse reflection increases the light intensity returned to the detection device, which is consistent with the laser detection effect. Compared with direct reflection, it can be more easily identified by detection equipment, thereby improving the sensitivity of detection; reducing total reflection and transmission. Due to its transparency, glass often causes laser to be transmitted through or reflected multiple times inside the glass, resulting in signal loss. The water mist layer can change the refraction and reflection path of light, reduce the direct transmission of laser through the glass, improve the surface's reflection effect on the laser, and increase the detectable signal. Water mist fills in tiny pits, scratches or defects on the glass surface, making the light scattering characteristics of these areas different from the surrounding intact glass surface, making them more obvious, which helps to show the location and size of these defects in optical detection.

[0044] Reference Figure 1 The supporting mechanism includes a plurality of limit columns 8, top support members 9 and extrusion members 10 arranged on the base 1, the limit columns 8 are in contact with the side of the glass frame 2, the top support members 9 are in contact with the lower end surface of the glass frame 2, and the extrusion members 10 are in extrusion contact with the side of the glass frame 2.

[0045] By providing a supporting mechanism, the glass frame 2 is restricted in multiple degrees of freedom to fix the curved glass 3 for easy detection.

[0046] Reference Figure 3-Figure 5 The shielding mechanism 5 includes a pair of mounting plates 11, the distance between the pair of mounting plates 11 exceeds the width of the glass frame 2, a pair of sliding rods 12 arranged between the pair of mounting plates 11, and a plurality of sliding plates 13 slidably arranged on the pair of sliding rods 12. Two connecting plates 14 are hinged between adjacent sliding plates 13, and the two connecting plates 14 are hinged. It also includes a turntable 15 arranged on one side of the mounting plate 11, a driving motor 16 arranged on the other side of the mounting plate 11, a turntable 2 17 arranged on the main shaft of the driving motor 16, and a transmission belt 18 sleeved on the turntable 15 and the turntable 2 17. The transmission belt 18 slides through the mounting plate 11 and the sliding plate 13, and one side of the transmission belt 18 is fixedly connected to one side of the sliding plate 13 through a fixing ring 19. The mounting plates 11 on the pair of shielding mechanisms 5 are connected to the base 1 through a vertical plate 20.

[0047] Specifically, the driving motor rotates to drive the transmission belt 18, and the transmission belt 18 pulls the sliding plate 13 at the end to move through the fixed ring 19, so that the multiple sliding plates 13 are close to or separated from each other, thereby driving the multiple connecting plates 14 to unfold into a plane or fold into a Z shape.

[0048] By providing the shielding mechanism 5 , the shielding mechanism 5 forms compartments on the upper and lower sides of the curved glass 3 after being unfolded, so that when the spraying mechanism 6 sprays water mist, the water mist can be concentrated and cover the surface of the curved glass 3 to form a water mist layer.

[0049] Reference Figure 6 The spray mechanism 6 includes a pair of branch pipes 21 arranged on the side of the glass frame 2, a main pipe 22 connected to the pair of branch pipes 21, an electromagnetic three-way valve 23 arranged at the connection between the main pipe 22 and the pair of branch pipes 21, and an atomizing nozzle 24 arranged on the pair of branch pipes 21, and the atomizing nozzle 24 is opposite to the pair of compartments.

[0050] Specifically, the electromagnetic three-way valve 23 is used to control the connection between the main pipe 22 and one of the upper and lower branches 21, and the atomizing nozzle 24 is used to atomize the pure water in the branch pipe 21 into water mist. In this embodiment, the atomizing nozzle 24 uses an ultrasonic nozzle to atomize the liquid using ultrasonic vibration to produce a very fine and uniform mist, so that the water mist fills the compartment and is evenly attached to the curved glass 3.

[0051] By providing a spray mechanism 6, water is atomized and sprayed evenly on the upper and lower surfaces of the curved glass 3 to form a water mist layer, temporarily changing the surface characteristics of the glass by physical methods, so as to facilitate more effective optical inspection.

[0052] Reference Figure 7 The scraping mechanism 7 includes a slide rail 25 arranged on the base 1, the slide rail 25 is parallel to the side of the glass frame 2, a slide motor 26 is arranged on the slide rail 25, an upper scraper 27 is closely arranged on the upper surface of the curved glass 3, and a lower scraper 28 is closely arranged on the lower surface of the curved glass 3. The upper scraper 27 and the lower scraper 28 are connected to the slide motor 26 through a U-shaped bracket 29.

[0053] Specifically, the slide rail 25 is parallel to the short side of the glass frame 2, and the U-shaped bracket 29 is fixedly connected to the upper scraper 27 and the lower scraper 28 at the same time. The recessed portion of the U-shaped bracket 29 is used to avoid interference with the shielding mechanism 5 during movement. When the slide motor 26 slides on the slide rail 25, it drives the upper scraper 27 and the lower scraper 28 to scrape along both sides of the curved glass 3.

[0054] By providing a scraping mechanism 7, both sides of the curved glass 3 are cleaned before spraying water mist, so as to clean dust and water mist on the detection surface and the opposite side of the detection surface, increase the water mist adhesion of the detection surface, and improve the detection accuracy.

[0055] Reference Figure 7 A sponge scraper 30 is provided on the upper scraper 27 and the lower scraper 28.

[0056] By providing the sponge scraper 30 , water mist can be absorbed while removing dust.

[0057] In this embodiment, a surface of the plurality of connecting plates 14 opposite to the curved glass 3 is covered with a hydrophobic film.

[0058] By providing a hydrophobic film, the surface of the shielding mechanism 5 facing the curved glass 3 after unfolding becomes a hydrophobic layer, so that water mist is not easy to adhere to the hydrophobic layer, and the probability of water mist adhering to the curved glass 3 is increased, which is conducive to forming a water mist layer.

[0059] Reference Figure 1 The laser scanning head 4 is provided with multiple ones for collecting the curvature values ​​of multiple points of the curved glass 3 .

[0060] The data acquired by multiple scanning heads can be cross-validated to improve the reliability and accuracy of the data. Data from multiple different angles can be used to build a more accurate 3D model to reflect the actual curvature and shape.

[0061] Working principle of the present invention:

[0062] In this embodiment, the lower surface of the curved glass 3 is first detected, the slide motor 26 is started to clean the surface of the curved glass 3, and then the drive motor 16 of the shielding mechanism 5 located at the lower side is started to expand the plurality of connecting plates 14 into a plane, and the electromagnetic three-way valve 23 is adjusted to connect the lower branch pipe 21 with the main pipe 22, so that the atomizing nozzle 24 sprays water mist to the compartment between the connecting plate 14 and the lower surface of the curved glass 3. After the lower surface of the curved glass 3 is covered with a layer of water mist, the flatness and curvature of the lower surface of the curved glass 3 are detected by the laser scanning head 4; then the upper surface of the curved glass 3 is detected, and the drive motor 16 of the shielding mechanism 5 located at the lower side is started to expand the plurality of connecting plates 14 into a plane. 4 is folded, and then the slide motor 26 is started to clean the surface of the curved glass 3, and then the driving motor 16 of the shielding mechanism 5 located on the upper side is started to unfold the several connecting plates 14 into a plane, and the electromagnetic three-way valve 23 is adjusted to connect the upper branch pipe 21 with the main pipe 22, so that the atomizing nozzle 24 sprays water mist to the compartment between the connecting plate 14 and the upper surface of the curved glass 3. After the upper surface of the curved glass 3 is covered with a layer of water mist, the flatness and curvature of the upper surface of the curved glass 3 are detected by the laser scanning head 4. Different from the detection of the lower surface, when detecting the upper surface, the laser must pass through the curved glass 3. If the glass surface is not clean, it may reduce the detection sensitivity of the equipment or interfere with the operation of the equipment.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for detecting curvature of automobile parts, comprising a base (1), characterized in that: Also includes, A supporting mechanism is arranged on the base (1) and is used to support the glass frame (2), and the curved glass (3) is placed in the glass frame (2); A laser scanning head (4) is arranged on the base (1) and is located below the curved glass (3), and is used for scanning and detecting the curved glass (3); A shielding mechanism (5) is symmetrically arranged on the upper and lower sides of the curved glass (3) and is used to form a partition cavity between the curved glass (3); A spray mechanism (6) is arranged on the side of the curved glass (3) and is used to spray water mist into the compartment; The scraping mechanism (7) is arranged on the side of the curved glass (3) and is used to scrape off the water mist on the curved glass (3).

2. The automobile parts curvature detection device according to claim 1, characterized in that: The support mechanism comprises a plurality of limit columns (8), a top support member (9) and an extrusion member (10) arranged on a base (1); the limit columns (8) are in contact with the side of the glass frame (2); the top support member (9) abuts against the lower end surface of the glass frame (2); and the extrusion member (10) is in extrusion contact with the side of the glass frame (2).

3. The automobile parts curvature detection device according to claim 1, characterized in that: The shielding mechanism (5) comprises a pair of mounting plates (11), the distance between the pair of mounting plates (11) exceeds the width of the glass frame (2), a pair of sliding rods (12) arranged between the pair of mounting plates (11), and a plurality of sliding plates (13) slidably arranged on the pair of sliding rods (12), two connecting plates (14) are hingedly connected between adjacent sliding plates (13), and the two connecting plates (14) are hingedly connected, and also comprises a turntable (15) arranged on one side of the mounting plate (11), and a rotating disk (15) arranged on the other side of the mounting plate (11). 1), a driving motor (16) on the driving motor (16), a turntable (17) arranged on the main shaft of the driving motor (16), and a transmission belt (18) sleeved on the turntable (15) and the turntable (17), wherein the transmission belt (18) slides through the mounting plate (11) and the sliding plate (13), one side of the transmission belt (18) is fixedly connected to one side of the sliding plate (13) through a fixing ring (19), and the mounting plates (11) on the pair of shielding mechanisms (5) are connected to the base (1) through a vertical plate (20).

4. The automobile part curvature detection device according to claim 1, characterized in that: The spray mechanism (6) comprises a pair of branch pipes (21) arranged on the side of the glass frame (2), a main pipe (22) connected to the pair of branch pipes (21), an electromagnetic three-way valve (23) arranged at the connection between the main pipe (22) and the pair of branch pipes (21), and an atomizing nozzle (24) arranged on the pair of branch pipes (21), wherein the atomizing nozzle (24) faces the pair of compartments.

5. The automobile parts curvature detection device according to claim 1, characterized in that: The scraping mechanism (7) comprises a slide rail (25) arranged on the base (1), the slide rail (25) being parallel to the side of the glass frame (2), a slide motor (26) being arranged on the slide rail (25), an upper scraper (27) being arranged in close contact with the upper surface of the curved glass (3), and a lower scraper (28) being arranged in close contact with the lower surface of the curved glass (3), and the upper scraper (27) and the lower scraper (28) being connected to the slide motor (26) via a U-shaped bracket (29).

6. The automobile parts curvature detection device according to claim 5, characterized in that: The upper scraper (27) and the lower scraper (28) are provided with sponge scraping strips (30).

7. The automobile part curvature detection device according to claim 3, characterized in that: A layer of hydrophobic film is covered on one side of the plurality of connecting plates (14) opposite to the curved glass (3).

8. The automobile part curvature detection device according to claim 7, characterized in that: The laser scanning heads (4) are provided in plurality and are used to collect the curvature values ​​of a plurality of points of the curved glass (3).

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