Plate straightness detection equipment

Abstract

The utility model relates to the technical field of pultrusion plate detection, in particular to plate straightness detection equipment, the plate straightness detection equipment comprises a rack, at least one image acquisition device and at least one lighting device, the rack extends along a first direction, a plate is erected on the rack, and the plate also extends along the first direction; the image acquisition device is located right above the plate, and a set distance is formed between the image acquisition device and the plate; the lighting devices are installed on the machine frame, the lighting devices correspond to the image collecting devices in a one-to-one mode, the lighting devices are arranged under the corresponding image collecting devices, and the lighting devices are located below the plates. By means of the design, the straightness of the plate is measured in the process that the plate moves towards the winding machine on the machine frame, the edge of an image collected by the image collecting device is clear, and the accuracy of a straightness detection result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pultruded plate detection, and in particular to a plate straightness detection device. Background Art

[0002] Fiber pultruded sheet is a sheet produced by pultrusion molding process. It has the advantages of high toughness, high strength and good corrosion resistance. Therefore, it is widely used in aerospace, wind power generation and other fields. With its wide application, the requirements for its quality and precision are gradually increasing. Straightness, as a shape tolerance, is an important parameter of fiber pultruded sheet.

[0003] However, when measuring the straightness of a plate, the image acquisition device is easily affected by ambient light, resulting in unclear images of the plate, thereby reducing the accuracy of the straightness measurement results. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a plate straightness detection device, which saves raw material costs and improves the accuracy of measurement results.

[0005] According to some embodiments, the present application provides a plate straightness detection device, which includes:

[0006] A frame, the frame extending along a first direction, the plate being mounted on the frame;

[0007] at least one image acquisition device, the image acquisition device being located directly above the plate and spaced a set distance from the plate;

[0008] At least one lighting device is installed on the frame, the lighting device corresponds to the image acquisition device one by one, the lighting device is arranged directly below the corresponding image acquisition device, and the lighting device is located below the plate.

[0009] In some embodiments of the present application, the lighting device includes a housing and a light source, the housing is disposed on the frame, the light source is fixed inside the housing, a through hole is disposed on a surface of the housing facing the plate, and light from the light source is emitted through the through hole;

[0010] The light source is electrically connected to a controller, and the controller is used to control the switch and brightness of the light source.

[0011] In some embodiments of the present application, the lighting device also includes an electric wire and a connector, the electric wire and the connector are both arranged inside the shell, the first end of the electric wire is connected to the light source, the second end of the electric wire is connected to the connector, and the controller is electrically connected to the light source through the connector and the electric wire.

[0012] In some embodiments of the present application, the plate straightness detection equipment also includes two limiting structures, which are relatively arranged at both ends of the frame along the first direction, and the limiting structures are used to support the plate and limit the plate so that the plate can move along the first direction.

[0013] In some embodiments of the present application, each of the limiting structures includes a support block and two limiting protrusions, the support block is mounted on the frame, a first surface of the support block is in contact with the plate, and two limiting protrusions are spaced apart on the first surface along a second direction, and a spacing between the two limiting protrusions in the second direction is adapted to a width of the plate in the second direction;

[0014] The second direction is perpendicular to the first direction.

[0015] In some embodiments of the present application, a groove extending along the second direction is provided on the first surface, the limiting protrusion includes a sliding block adapted to the groove, and the limiting protrusion is slidably connected to the first surface through the groove and the sliding block.

[0016] In some embodiments of the present application, the plate straightness detection device further includes at least one ball plate, the ball plate is disposed on the frame, and the ball plate is located below the plate;

[0017] In the vertical direction, the highest point of the ball bearing plate is flush with the first surface.

[0018] In some embodiments of the present application, the ball plate includes a base plate, a plurality of circular grooves and balls. The plurality of circular grooves are arranged on the base plate. The circular grooves correspond one-to-one to the balls. The balls are arranged in the circular grooves. The balls are rollingly connected to the circular grooves.

[0019] In some embodiments of the present application, the plate straightness detection device further includes two groups of fixed structures and two steel wire ropes, each group of the fixed structures includes two fixed structures, the two fixed structures in the same group are relatively arranged at two ends of the frame along the first direction, the two ends of the steel wire rope are fixed to the two fixed structures in the same group, and the steel wire rope extends along the first direction and remains in a tensioned state;

[0020] The two sets of fixing structures fix the two steel wire ropes on the two sides of the plate respectively.

[0021] In some embodiments of the present application, the fixed structure includes a fixed plate, a connecting column and a fixed ring. The plane where the fixed plate is located is perpendicular to the first direction. The first end of the fixed plate is slidably installed on the frame. The second end of the fixed plate is fixedly connected to the first end of the connecting column. The connecting column extends along the first direction. The fixed ring is arranged at the second end of the connecting column. The plane where the fixed ring is located is perpendicular to the plane where the fixed plate is located. The fixed ring is connected to the wire rope to fix the wire rope.

[0022] The plate straightness detection device provided by this application can achieve the following beneficial technical effects:

[0023] The plate straightness detection equipment provided in the present application is configured by arranging at least one image acquisition device and at least one lighting device on a frame. When the plate is mounted on the frame, the image acquisition device is located directly above the plate, and the corresponding lighting device is arranged below the plate. The arrangement of the backlight source makes the edge of the plate clearer, overcoming the influence of ambient light. Therefore, the straightness measured by the image captured by the image acquisition device is more accurate, thereby improving the accuracy of the plate straightness measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings herein are incorporated into the specification and constitute a part of the specification to illustrate embodiments of the present application and are used together with the description to explain the principles of the present application. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present application, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a plate straightness detection device shown in an embodiment of the present application;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the lighting device;

[0027] Figure 3 yes Figure 1 Structural schematic diagram of the middle limit structure;

[0028] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle ball device.

[0029] Reference numerals:

[0030] 10. Plates;

[0031] 100, frame; 110, first beam;

[0032] 200, image acquisition device; 210, support rod;

[0033] 300, lighting device; 310, housing; 3110, through hole; 3120, first mounting plate; 320, light source; 330, wire; 340, connector;

[0034] 400, limiting structure; 410, supporting block; 4110, first surface; 4120, groove; 4130, second mounting plate; 420, limiting protrusion; 4210, sliding block;

[0035] 500, ball bearing device; 510, ball bearing plate; 5110, bottom plate; 5120, circular groove; 5130, ball bearing; 520, supporting structure; 5210, supporting column; 5211, slideway; 5220, supporting beam;

[0036] 600, fixed structure; 610, fixed plate; 620, connecting column; 630, fixed ring;

[0037] 700, wire rope;

[0038] 800, workbench; 810, controller; 820, industrial computer; 8210, display. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0040] In order to solve the problem of unclear images captured by an image acquisition device during straightness measurement of a plate, an embodiment of the present application provides a plate straightness detection device, by arranging at least one image acquisition device and at least one lighting device on a frame. When the plate is mounted on the frame, the image acquisition device is located directly above the plate, and the corresponding lighting device is arranged below the plate. The setting of the backlight source makes the edge of the plate clearer, so the straightness measured by the image captured by the image acquisition device is more accurate, thereby improving the accuracy of the plate straightness measurement result.

[0041] The plate straightness detection equipment provided according to the present application is described in detail below in conjunction with the accompanying drawings.

[0042] Figures 1 to 4In the figure, the x-axis direction is the first direction, the y-axis direction is the second direction, and the z-axis direction is the vertical direction.

[0043] It should be noted that the plate straightness detection equipment in the present application performs detection after the plate 10 is produced and before it is wound up by the winder, that is, the frame 100 is located in front of the winder, and the plate 10 is pulled by the winder to move, and the moving direction of the plate 10 is the direction of the winder.

[0044] An exemplary embodiment of the present application provides a plate 10 straightness detection device, such as Figure 1 As shown, the plate straightness detection equipment includes a frame 100, at least one image acquisition device 200 and at least one lighting device 300, wherein the frame 100 extends along a first direction, the plate 10 is mounted on the frame 100, and the plate 10 extends along the first direction; the frame 100 includes two first beams 110 that are parallel to each other and extend along the first direction, and the two first beams 110 are spaced apart along the y-axis direction.

[0045] The image acquisition device 200 is located directly above the plate 10 and is separated from the plate 10 by a set distance; the lighting device 300 is installed on the frame 100, specifically, the lighting device 300 is installed on two first beams 110, and the lighting device 300 is arranged directly below the corresponding image acquisition device 200 and is located below the plate 10.

[0046] The process of using the above-mentioned plate straightness detection equipment to collect images of the plate 10 is as follows: after the plate 10 is mounted on the frame 100, the lighting device 300 is turned on to provide a backlight source 320 for the plate 10, and the image acquisition device 200 is started to capture images of several positions of the plate 10.

[0047] In this embodiment, by setting at least one image acquisition device 200 and at least one lighting device 300 on the frame 100, when the plate 10 is mounted on the frame 100, the image acquisition device 200 is located directly above the plate 10, and the corresponding lighting device 300 is set below the plate 10. The setting of the backlight source makes the edge of the plate 10 clearer and overcomes the influence of ambient light. Therefore, the straightness measured by the image captured by the image acquisition device 200 is more accurate, thereby improving the accuracy of the straightness measurement result of the plate 10.

[0048] It should be noted that at least one image acquisition device 200 needs to be set. For example, in the present embodiment, three image acquisition devices 200 are set, and the corresponding lighting devices 300 are also three. In other embodiments, the image acquisition devices 200 can also be four, five, etc. The more the number of settings is, the more samples are taken for the plates 10 of the same length, and the straightness measurement result of the plate 10 is more accurate, so the judgment result of whether the straightness is within the preset standard is more accurate.

[0049] In some embodiments, the support rod 210 is used to install the image acquisition device 200 on the frame 100, and the image acquisition device 200 is located directly above the plate 10, that is, the image acquisition device 200 and the plate 10 are separated by a set distance in the vertical direction, so as to ensure that the image acquisition device 200 can acquire a complete plate image. In this embodiment, the support rod 210 is set in an "L" shape, and the image acquisition device 200 is fixed to one end of the support rod 210 extending along the y-axis direction. In other embodiments, the support rod 210 can also be other shapes, all of which are within the protection scope of this application.

[0050] In some embodiments, Figure 2 As shown, the lighting device 300 includes a housing 310 and a light source 320. The housing 310 is mounted on two first beams 110. Two first mounting plates 3120 extending in a first direction are arranged inside the housing 310. The light source 320 is installed inside the housing 310. Two ends of the light source 320 in a second direction are respectively fixed on the two first mounting plates 3120. A through hole 3110 is arranged on one side of the housing 310 facing the plate 10 for light from the light source 320 to be emitted. The light source 320 is electrically connected to a controller 810. The controller 810 is used to control the switch and brightness of the light source 320. The controller 810 is arranged on a workbench 800.

[0051] The housing 310 can also support the plate 10. In order to reduce the friction force on the plate 10 during movement, the contact area can be reduced, such as Figure 1 As shown, when viewed from the y-axis direction, the cross-section of the housing 310 is set to be trapezoidal; balls 5130 can also be installed at the part where the housing 310 contacts the plate 10 to reduce friction by changing sliding into rolling.

[0052] In this embodiment, the housing 310 is provided to not only protect the light source 320, but also support the plate 10, thereby avoiding inaccurate measurement results caused by the plate 10 bending downward under the action of gravity. In addition, the brightness of the light source 320 can be adjusted. With such a design, the brightness of the light source 320 can be adjusted according to the ambient brightness. When the ambient light is bright, the brightness of the light source 320 is increased, so that the edge of the plate 10 in the image captured by the image acquisition device 200 is clear; when the ambient light is dark, the brightness of the light source 320 is reduced, saving electric energy.

[0053] It should be noted that in this embodiment, the length of the light source 320 in the y-axis direction is greater than the width of the plate 10 in the y-axis direction. Since the light source 320 is divergent, if the length of the light source 320 in the y-axis direction is less than the width of the plate 10 in the y-axis direction, it can also serve as a backlight source.

[0054] In some embodiments, continue to refer to Figure 2 The lighting device 300 also includes a wire 330 and a connector 340. One end of the wire 330 is connected to the light source 320, and the other end is connected to the connector 340. The controller 810 is electrically connected to the light source 320 through the wire 330 and the connector 340, thereby controlling the switch and brightness of the light source 320.

[0055] In some embodiments, Figure 1 As shown, the plate straightness detection device also includes two limiting structures 400, which are relatively arranged at the two ends of the frame 100 along the x-axis direction. The limiting structures 400 support the plate 10 and limit the plate 10 at the same time. The setting of the limiting structure 400 prevents the plate 10 from shaking left and right during the movement toward the winder, that is, moving in the y-axis direction, thereby ensuring the accuracy of the measurement result.

[0056] In some embodiments, Figure 3 As shown, each limiting structure 400 includes a support block 410 and two limiting protrusions 420, the support block 410 includes a second mounting plate 4130, the support block 410 is mounted on the frame 100 through the second mounting plate 4130, and the first surface 4110 of the support block 410 is in contact with the plate 10; the two limiting protrusions 420 are arranged on the first surface 4110 at intervals in the y-axis direction, and the interval distance is adapted to the width of the plate 10, the width of the plate 10 refers to the width of the plate 10 in the y-axis direction, and the adaptation here means that the spacing between the two limiting protrusions 420 is equal to or slightly larger than the width of the plate 10.

[0057] The limiting protrusion 420 in this embodiment is a cylinder. The limiting protrusion 420 can also be a cuboid or other shapes, all of which are within the protection scope of the present application. The limiting protrusion 420 has a simple structure and is easy to produce, thereby achieving the limitation of the plate 10.

[0058] In some embodiments, continue to refer to Figure 3 A groove 4120 is provided on the first surface 4110 of the support block 410, and the groove 4120 extends along the second direction. A slider 4210 is provided at the bottom of the limiting protrusion 420, and the shape of the slider 4210 is adapted to the groove 4120. By providing the groove 4120 and the slider 4210, the movement of the limiting protrusion 420 on the support block 410 is realized, thereby realizing the limiting of the plates 10 of different widths.

[0059] In some embodiments, reference Figure 1 The plate straightness detection equipment also includes at least one ball device 500, the ball device 500 includes a ball plate 510 and a support structure 520, the support structure 520 is arranged on the two first beams 110 of the frame 100, and the support structure 520 is used to support the ball plate 510, so that the ball plate 510 is located below the plate 10, and in the vertical direction, the highest point of the ball plate 510 is flush with the first surface 4110 of the support block 410; such a design not only supports the plate 10 but also reduces the friction force on the plate 10 during movement.

[0060] In some embodiments, Figure 4 As shown, the ball plate 510 includes a bottom plate 5110, a plurality of circular grooves 5120 and a ball 5130. The circular grooves 5120 are arranged on the bottom plate 5110. A ball 5130 is installed in each circular groove 5120, and the ball 5130 can roll in the circular groove 5120. The support structure 520 includes four support columns 5210 and two support beams 5220. The four support columns 5210 are installed on the first cross beam 110 and are respectively located at the four corners of the bottom plate 5110. The support columns 5210 are provided with slideways 5211. In the y-axis direction, a support beam 5220 is installed between two support columns 5210 on the same side. The support beam 5220 extends along the x-axis direction. The bottom plate 5110 is installed on the support beam 5220. The support beam 5220 is slidably connected with the two support columns 5210 through the slideways 5211.

[0061] With such a design, the height of the ball plate 510 in the vertical direction can be adjusted in real time according to actual conditions to provide support for the plate 10 .

[0062] In some embodiments, Figure 1 and Figure 3As shown, the plate straightness detection device has two sets of fixed structures 600 and two steel wire ropes 700, wherein the two fixed structures 600 in each set of fixed structures 600 are relatively arranged at the two ends of the frame 100 along the first direction to fix the steel wire ropes 700 and keep the steel wire ropes 700 in a tensioned state and extend along the first direction. The two sets of fixed structures 600 are arranged on both sides of the plate 10 in the second direction so that the two steel wire ropes 700 are located on both sides of the plate 10 for use as calibration lines.

[0063] By setting the steel wire rope 700 as a calibration line, when using software to process the image captured by the image acquisition device 200, it is only necessary to obtain the distance between the calibration line and the edge of the plate 10 and compare it with the preset range to determine whether the straightness of the plate 10 is qualified. The straightness of the plate 10 can be obtained without going through a complicated image processing process.

[0064] In some embodiments, Figure 3 As shown, the fixed structure 600 includes a fixed plate 610, a connecting column 620 and a fixing ring 630. The fixed plate 610 is mounted on the support block 410 of the limiting structure 400 and is slidably connected to the support block 410. The plane where the fixed plate 610 is located is perpendicular to the first direction, and the fixed plate 610 can move in the second direction. The first end of the fixed plate 610 is slidably connected to the support block 410, the second end of the fixed plate 610 is connected to the first end of the connecting column 620, the connecting column 620 extends along the first direction, the second end of the connecting column 620 is connected to the fixing ring 630, the plane where the fixing ring 630 is located is perpendicular to the plane where the fixed plate 610 is located, and the fixing ring 630 is used to connect the wire rope 700.

[0065] By slidably connecting the fixing plate 610 and the supporting block 410 , the fixing plate 610 can be moved according to the width of different plates 10 , so that the steel wire rope 700 is separated from the plate 10 by an appropriate distance, which is beneficial to the measurement of the straightness of the plate 10 .

[0066] In some embodiments, the plate straightness detection device further includes a workbench 800, and a controller 810 and an industrial computer 820 are both disposed inside the workbench 800. The controller 810 is used to control the switch and brightness of the light source 320; the industrial computer 820 is also called an industrial control computer, which is a general term for tools that use a bus structure to detect and control production processes, electromechanical equipment, and process equipment; the industrial computer 820 includes hardware and software, the former has the same properties and features as a computer, and integrates a display, a touch screen, a host, a CPU, a graphics card, a memory, a hard disk, and a peripheral interface; the latter has an operating system, a control network, computing capabilities, and a human-computer interface, etc.

[0067] The display 8210 of the industrial computer 820 is set on the workbench 800. The industrial computer 820 is used to process the images collected by the image acquisition device 200. Specifically, an image processing algorithm is used to obtain the distance between the edge of the plate 10 and the wire rope 700 in each image, and it is compared with the standard range to determine whether it is within the preset range. If it is within the preset range, it proves that the straightness of the plate 10 is qualified. The display 8210 is used to display the software interface including the comparison result. The straightness data obtained by the detection can be managed using the MySQL database management system, for example.

[0068] By setting up the workbench 800, the controller 810, the industrial computer 820, and the display 8210 are integrated in one place, which makes it convenient for technicians to control the straightness detection equipment of the plate 10.

[0069] The process of measuring the straightness of the plate 10 by the plate straightness detection device is as follows:

[0070] Assume that the plate 10 is placed on the frame 100, that is, on the limiting structures 400 at both ends of the frame 100, and adjust the distance between the two limiting protrusions 420 to achieve the limiting effect on the plate 10; adjust the height of the ball plate 510 in the vertical direction so that its highest point is flush with the first surface 4110 of the support block 410; adjust the positions of the four fixed plates 610 in the two groups of fixed structures 600 so that the two steel wire ropes 700 are located at an appropriate distance on both sides of the plate 10, and the two steel wire ropes 700 extend along the first direction; turn on the light source 320 through the controller 810 and adjust it to a suitable brightness; turn on the image acquisition device 200.

[0071] After the winder is started, the plate 10 begins to move, and the image is collected during the movement. The collected image is processed by the industrial computer 820, and the image processing algorithm is used to calculate the distance from the edge of the plate 10 to the wire rope 700, and the straightness of the plate 10 is determined. The straightness is compared with the preset range to determine whether the straightness of the plate 10 is qualified.

[0072] The plate straightness detection device provided in this embodiment overcomes the influence of ambient light by arranging a light source 320 corresponding to the image acquisition device 200 below the plate 10, thereby ensuring the clarity of the edge of the plate 10 in the image, and further improving the accuracy of the straightness detection result; in addition, by arranging a limit protrusion 420 and a fixed structure 600 whose positions can be adjusted, the straightness measurement of plates 10 of different widths is achieved.

[0073] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of this application.

[0074] It should be noted that, in the description of the present application, the terms "upper", "lower", "front", "back", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0077] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A plate straightness detection device, It is characterized in that The plate straightness detection device comprises: A frame, the frame extending along a first direction, the plate being mounted on the frame; at least one image acquisition device, the image acquisition device being located directly above the plate and spaced a set distance from the plate; At least one lighting device is installed on the frame, the lighting device corresponds to the image acquisition device one by one, the lighting device is arranged directly below the corresponding image acquisition device, and the lighting device is located below the plate.

2. The plate straightness detection device according to claim 1, It is characterized in that The lighting device comprises a housing and a light source, wherein the housing is arranged on the frame, the light source is fixed inside the housing, a through hole is arranged on a surface of the housing facing the plate, and light from the light source is emitted through the through hole; The light source is electrically connected to a controller, and the controller is used to control the switch and brightness of the light source.

3. The plate straightness detection device according to claim 2, It is characterized in that The lighting device also includes an electric wire and a connector, wherein the electric wire and the connector are both arranged inside the shell, a first end of the electric wire is connected to the light source, a second end of the electric wire is connected to the connector, and the controller is electrically connected to the light source via the connector and the electric wire.

4. The plate straightness detection device according to claim 1, It is characterized in that The plate straightness detection device also includes two limiting structures, which are relatively arranged at two ends of the frame along the first direction. The limiting structures are used to support the plate and limit the plate so that the plate can move along the first direction.

5. The plate straightness detection device according to claim 4, It is characterized in that Each of the limiting structures comprises a support block and two limiting protrusions, wherein the support block is mounted on the frame, a first surface of the support block contacts the plate, and two limiting protrusions are arranged on the first surface at intervals along a second direction, and a spacing between the two limiting protrusions in the second direction is adapted to a width of the plate in the second direction; The second direction is perpendicular to the first direction.

6. The plate straightness detection device according to claim 5, It is characterized in that The first surface is provided with a groove extending along the second direction, the limiting protrusion includes a sliding block adapted to the groove, and the limiting protrusion is slidably connected to the first surface through the groove and the sliding block.

7. The plate straightness detection device according to claim 5, It is characterized in that The plate straightness detection device further comprises at least one ball bearing plate, the ball bearing plate is arranged on the frame, and the ball bearing plate is located below the plate; In the vertical direction, the highest point of the ball bearing plate is flush with the first surface.

8. The plate straightness detection device according to claim 7, It is characterized in that The ball plate includes a base plate, a plurality of circular grooves and balls. The plurality of circular grooves are arranged on the base plate. The circular grooves correspond to the balls one by one. The balls are arranged in the circular grooves. The balls are rollingly connected to the circular grooves.

9. The plate straightness detection device according to claim 1, It is characterized in that The plate straightness detection device also includes two groups of fixed structures and two steel wire ropes, each group of the fixed structures includes two fixed structures, the two fixed structures in the same group are relatively arranged at the two ends of the frame along the first direction, the two ends of the steel wire rope are fixed to the two fixed structures in the same group, and the steel wire rope extends along the first direction and remains in a tensioned state; The two sets of fixing structures fix the two steel wire ropes on the two sides of the plate respectively.

10. The plate straightness detection device according to claim 9, It is characterized in that The fixing structure includes a fixing plate, a connecting column and a fixing ring. The plane where the fixing plate is located is perpendicular to the first direction. The first end of the fixing plate is slidably installed on the frame. The second end of the fixing plate is fixedly connected to the first end of the connecting column. The connecting column extends along the first direction. The fixing ring is arranged at the second end of the connecting column. The plane where the fixing ring is located is perpendicular to the plane where the fixing plate is located. The fixing ring is connected to the steel wire rope to fix the steel wire rope.

Images