A laser vision-based liquefied gas ship plate flatness intelligent detection device

Abstract

The application discloses a kind of based on laser vision's liquefied gas ship plate flatness intelligent detection device, it is related to plate detection technical field, including two mounting plates, the outer side of two mounting plates is fixedly connected with U-shaped plate, the outer side of two U-shaped plates is fixedly connected with fixed block, limit unit is arranged between two mounting plates, the outer side of U-shaped plate is provided with detection unit, the detection unit includes guide plate, the guide plate is fixedly connected in the outer side of U-shaped plate, the outer side of guide plate is slidably connected with guide block.The plate flatness intelligent detection device, by being provided with guide block, electric push rod two, electric push rod three, it is convenient to control industrial camera, laser ranging head detects the flatness of plate, and by rocker, electric push rod one and top plate, control industrial camera and laser ranging head overturn, it is convenient to detect the other side of plate, simple operation, compared with the mode of overturning plate is more labor-saving.

Description

Technical Field

[0001] This invention relates to the field of sheet metal inspection technology, specifically to an intelligent inspection device for the flatness of sheet metal used in liquefied gas ships based on laser vision. Background Technology

[0002] Liquefied gas carriers (LNG, LEG, LPG, LCO2, LNH3, etc.) have extremely high requirements for the dimensional stability, load-bearing capacity, and service reliability of the timber used in the support and insulation structures of the cargo tanks. Laminated wood is widely used in the timber supports and related structural parts of LNG carrier cargo tanks due to its good mechanical properties, dimensional design flexibility, and low-temperature adaptability.

[0003] Due to limitations in the specifications of hot-pressing equipment and process conditions, laminated wood for liquefied gas vessels typically employs a manufacturing process involving layered preparation and secondary gluing. The thickness of laminated wood boards formed by a single hot pressing is generally 5–8 cm, while the actual thickness required for finished boards in engineering projects usually reaches 30–50 cm, necessitating secondary gluing to achieve increased thickness and overall shaping.

[0004] During the secondary gluing process, the uniformity of flatness between the laminated wood pieces is one of the key factors affecting the gluing quality. If the boards to be glued have warping, local unevenness, or overall flatness deviations, it will lead to uneven glue layer thickness distribution, local stress concentration, glue interface defects, or even delamination, which will seriously affect the mechanical properties, low-temperature service safety, and long-term reliability of the laminated wood structure.

[0005] Currently, the flatness inspection of laminated wood for liquefied gas vessels before secondary gluing mainly relies on manual experience or simple contact measuring tools for random sampling. This method suffers from low inspection efficiency, high subjectivity, limited inspection accuracy, and difficulty in achieving rapid full-width assessment, making it difficult to meet the engineering production requirements of large-scale, high-quality materials. Especially when the boards are large in size, heavy, and have complex surface conditions, traditional inspection methods are even less able to achieve stable, accurate, and intelligent flatness evaluation.

[0006] When existing sheet metal inspection equipment performs inspections, it first uses an industrial camera to locate the sheet metal, and then uses a laser rangefinder to inspect it. The camera and laser rangefinder head are moved by a moving module, but it can only inspect the upper surface of the sheet metal. When the lower surface needs to be inspected, the operator needs to use tools to flip the heavy sheet metal, which is cumbersome and can easily damage the sheet metal during the flipping process, affecting the inspection accuracy.

[0007] Therefore, this invention proposes an intelligent detection device for the flatness of liquefied gas ship plates based on laser vision to solve the aforementioned problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an intelligent detection device for the flatness of liquefied gas ship plates based on laser vision, which solves the problem that only one side of the plate can be detected during inspection, requiring workers to flip the plate.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A laser vision-based intelligent flatness detection device for liquefied gas marine steel plates includes two mounting plates. A U-shaped plate is fixedly connected to the outer side of each mounting plate. A fixing block is fixedly connected to the outer side of each U-shaped plate. A limit unit is provided between the two mounting plates. A detection unit is located on the outer side of each U-shaped plate. The detection unit includes a guide plate, which is fixedly connected to the outer side of the U-shaped plate. A guide block is slidably connected to the outer side of the guide plate. A rotating rod is rotatably connected to the outer side of the guide block. A control plate is fixedly connected to the outer side of the rotating rod. A top plate is fixedly connected to the upper side of the control plate. A groove is formed on the outer side of the top plate. A slider is slidably connected to the inner side of the groove. A bottom block is fixedly connected to the lower side of the slider. A bottom plate is fixedly connected to the lower side of the bottom block. An industrial camera and a laser rangefinder are fixedly connected to the lower side of the bottom plate.

[0010] Preferably, a fixing plate is fixedly connected to the outer side of the fixing block, a support leg is fixedly connected to the outer side of the fixing plate, a rotating plate is fixedly connected to the outer end of the rotating rod, an electric push rod is rotatably connected to the outer side of the rotating plate, a side block is fixedly connected to the outer side of the guide block, a mounting block is fixedly connected to the outer side of the side block, the electric push rod is rotatably connected to the mounting block, an electric push rod is fixedly connected between the fixing block and the side block, and an electric push rod is fixedly connected to the inner side of the slide groove to drive the slider to move.

[0011] Preferably, the limiting unit includes multiple moving slots, two of which are opened on the outer side of the mounting plate, and two sliders are slidably connected to the inner side of each of the two moving slots. A connecting plate is fixedly connected to the outer side of the sliders, and a support frame is fixedly connected to the upper side of the connecting plates on both sides. Multiple support rollers are provided on the outer side of the support frame.

[0012] Preferably, a movable block is fixedly connected to the outer side of each of the two sliders on the same side, a bidirectional screw is rotatably connected to the inner side of the U-shaped plate, a motor is fixedly connected to the outer side of the U-shaped plate, and a movable block is fixedly connected to the outer side of the slider.

[0013] Preferably, the two ends of the bidirectional screw are provided with opposite threads, and the two ends of the bidirectional screw are respectively threaded to the two moving blocks on both sides. The outer ends of the two bidirectional screws on both sides are fixedly connected with pulleys, and a belt is provided between the two pulleys. The helical directions of the two bidirectional screws on both sides are opposite.

[0014] Preferably, an L-shaped plate is fixedly connected to the outer side of each of the two mounting plates, and a sliding rod is provided on the outer side of each of the two L-shaped plates. A limit plate is fixedly connected to one end of the sliding rod, and an inclined plate is rotatably connected to the outer side of the other end of the sliding rod. A guide rail is fixedly connected to the outer side of the L-shaped plate, and a lifting block is slidably connected to the outer side of the guide rail. A toothed plate is fixedly connected to the outer side of the lifting block, and the inclined plate is rotatably connected to the toothed plate. A gear that meshes with the toothed plate is fixedly connected to the middle of the bidirectional screw.

[0015] Preferably, the inclined plates on both sides are symmetrically distributed, the slide rod is slidably connected to the L-shaped plate, and the limiting plate is located above the support roller.

[0016] Preferably, the upper side of the limiting plate is provided with a top groove, and two sliders three are slidably connected to the inner side of the top groove. A stabilizing plate one is fixedly connected to one side of the slider three, a reinforcing plate is fixedly connected to the outer side of the stabilizing plate one, and a rubber block is fixedly connected to the outer side of the reinforcing plate. A stabilizing plate two is fixedly connected to the other side of the slider three, a rotating block one is fixedly connected to the outer side of the stabilizing plate two, an inclined plate one is rotatably connected to the outer side of the rotating block one, and rotating blocks two are rotatably connected to the outer side of the inclined plates one on both sides. A control block is fixedly connected to the outer side of the rotating block two, a connecting block is fixedly connected between the control block and the L-shaped plate, and the control block is slidably connected to the slide rod.

[0017] This invention provides an intelligent detection device for the flatness of liquefied gas marine steel plates based on laser vision. Compared with existing technologies, it has the following advantages: (1) The intelligent flatness detection device for the board material is equipped with guide blocks, electric push rod 2 and electric push rod 3, which facilitates the control of industrial camera and laser rangefinder to detect the flatness of the board material. The industrial camera and laser rangefinder are flipped over by rotating rod, electric push rod 1 and top plate, which facilitates the detection of the other side of the board material. The operation is simple and more labor-saving than flipping the board material.

[0018] (2) The intelligent flatness detection device for the board is equipped with a connecting plate, support frame, support roller, bidirectional screw, gear, toothed plate and limiting plate. When the other side of the board is detected, the support rollers on both sides are controlled to move away from the board while the limiting plate limits the board, so that the board is suspended in the air, which helps to detect the flatness of the lower surface of the board later.

[0019] (3) The intelligent flatness detection device for the board material is equipped with a limit plate, a reinforcing plate, an inclined plate, a control block and a connecting block. When the limit plate limits the board material, the reinforcing plates on both sides limit the board material again, which further improves the stability of the board material when it is suspended. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial three-dimensional structural diagram of the detection unit in this invention; Figure 5 This is a partial top-view perspective structural diagram of the present invention; Figure 6 This is a partial side-view perspective view of the three-dimensional structure of this invention; Figure 7 This is a partial three-dimensional structural diagram of the limiting unit in this invention; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 for Figure 7 Enlarged view of point C in the middle.

[0021] In the diagram: 1. Mounting plate; 2. U-shaped plate; 3. Fixing block; 4. Fixing plate; 5. Support leg; 6. Detection unit; 7. Limiting unit; 8. Motor; 61. Guide plate; 62. Guide block; 63. Rotating rod; 64. Control board; 65. Rotating plate; 66. Side block; 67. Electric push rod one; 68. Mounting block; 69. Electric push rod two; 610. Top plate; 611. Slide groove; 612. Electric push rod three; 613. Slider one; 614. Bottom block; 615. Bottom plate; 616. Industrial camera; 617. Laser rangefinder; 71. Bidirectional screw; 72. Moving block; 7 3. Pulley; 74. Belt; 75. Gear; 76. L-shaped plate; 77. Moving groove; 78. Slider II; 79. Connecting plate; 710. Support frame; 711. Support roller; 712. Slide rod; 713. Limiting plate; 714. Top groove; 715. Slider III; 716. Stabilizing plate I; 717. Reinforcing plate; 718. Rubber block; 719. Stabilizing plate II; 720. Rotating block I; 721. Inclined plate I; 722. Rotating block II; 723. Control block; 724. Connecting block; 725. Guide rail; 726. Lifting block; 727. Toothed plate; 728. Inclined plate II. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides the following technical solutions: Example 1 Please see Figure 1 - Figure 9 A laser vision-based intelligent detection device for the flatness of liquefied gas ship plates includes two mounting plates 1. A U-shaped plate 2 is fixedly connected to the outer side of each mounting plate 1. Fixing blocks 3 are fixedly connected to the outer side of each U-shaped plate 2. A limit unit 7 is provided between the two mounting plates 1. A detection unit 6 is provided on the outer side of the U-shaped plate 2. The detection unit 6 includes a guide plate 61, which is fixedly connected to the outer side of the U-shaped plate 2. A guide block 62 is slidably connected to the outer side of the guide plate 61. A rotating rod 63 is rotatably connected to the outer side of the guide block 62. A control plate 64 is fixedly connected to the outer side of the rotating rod 63. A top plate 610 is fixedly connected to the upper side of the control plate 64. A groove 611 is formed on the outer side of the top plate 610. A slider 613 is slidably connected to the inner side of the groove 611. A bottom block 614 is fixedly connected to the lower side of the slider 613. A base plate 615 is fixedly connected to the lower side of component 4. An industrial camera 616 and a laser rangefinder 617 are fixedly connected to the lower side of the base plate 615. When inspecting the board material, the board material is first placed on the support rollers 711 on both sides. Then, the electric push rod 69 is controlled to drive the guide block 62 to move. The guide block 62 drives the control plate 64 to move left and right. The control plate 64 drives the top plate 610 to move left and right. The top plate 610 drives the industrial camera 616 and the laser rangefinder 617 to move left and right. The electric push rod 612 is controlled to drive the slider 613 to move back and forth. The slider 613 drives the base block 614 to move. The base block 614 drives the base plate 615 to move back and forth. The base plate 615 drives the industrial camera 616 and the laser rangefinder 617 to move back and forth, which facilitates the industrial camera 616 and the laser rangefinder 617 to inspect the flatness of the board material.

[0024] A fixing plate 4 is fixedly connected to the outer side of the fixing block 3, and a support leg 5 is fixedly connected to the outer side of the fixing plate 4. A rotating plate 65 is fixedly connected to the outer end of the rotating rod 63, and an electric push rod 67 is rotatably connected to the outer side of the rotating plate 65. A side block 66 is fixedly connected to the outer side of the guide block 62, and a mounting block 68 is fixedly connected to the outer side of the side block 66. The electric push rod 67 is rotatably connected to the mounting block 68. An electric push rod 69 is fixedly connected between the fixing block 3 and the side block 66. An electric push rod 69 that drives the slider 613 to move is fixedly connected to the inner side of the slide groove 611. Rod 3 (612): After the upper surface of the board is inspected, control electric push rod 1 (67) to drive the rotating plate 65 to rotate. The rotating plate 65 drives the rotating rod 63 to rotate, and the rotating rod 63 drives the control board 64 to rotate. The control board 64 drives the top plate 610 to rotate, and the top plate 610 drives the industrial camera 616 and the laser rangefinder 617 to flip over, so that the industrial camera 616 and the laser rangefinder 617 are located below the board. Then, control electric push rod 2 (69) to facilitate and quickly inspect the lower surface of the board. Compared with the board flipping method, this method is more labor-saving.

[0025] The limiting unit 7 includes multiple moving slots 77. Two moving slots 77 are each opened on the outer side of the mounting plate 1. Sliding blocks 78 are slidably connected to the inner side of each of the two moving slots 77. Connecting plates 79 are fixedly connected to the outer side of the sliding blocks 78. Support frames 710 are fixedly connected to the upper side of the connecting plates 79 on both sides. Multiple support rollers 711 are provided on the outer side of the support frames 710. Moving blocks 72 are fixedly connected to the outer side of the two sliding blocks 78 on the same side. A bidirectional screw 71 is rotatably connected to the inner side of the U-shaped plate 2. A motor 8 is fixedly connected to the outer side of the U-shaped plate 2. Moving blocks 72 are fixedly connected to the outer side of the sliding blocks 78. The two ends of the bidirectional screw 71 are provided with opposite threads. The two ends of the bidirectional screw 71 are respectively connected to... The two movable blocks 72 are threaded together, and the outer ends of the two bidirectional screws 71 are fixedly connected to pulleys 73. A belt 74 is provided between the two pulleys 73. The helical directions of the two bidirectional screws 71 are opposite. When inspecting the lower surface of the board, the motor 8 is started. The motor 8 drives the bidirectional screws 71 to rotate. The bidirectional screws 71 drive the movable blocks 72 to move. The movable blocks 72 drive the second slider 78 to move. The second slider 78 drives the connecting plate 79 to move. The connecting plate 79 drives the support frame 710 to move. The support frame 710 drives the support rollers 711 to move. The support rollers 711 on the left and right sides move towards each other, so that the support rollers 711 are separated from the board and the support rollers 711 are not blocked by the board and affect the inspection.

[0026] L-shaped plates 76 are fixedly connected to the outer sides of both mounting plates 1. Slide rods 712 are provided on the outer sides of both L-shaped plates 76. A limit plate 713 is fixedly connected to one end of each slide rod 712, and a second inclined plate 728 is rotatably connected to the outer side of the other end of each slide rod 712. A guide rail 725 is fixedly connected to the outer side of each L-shaped plate 76. A lifting block 726 is slidably connected to the outer side of the guide rail 725. A toothed plate 727 is fixedly connected to the outer side of the lifting block 726. The second inclined plate 728 is rotatably connected to the toothed plate 727. A gear 75 that meshes with the toothed plate 727 is fixedly connected to the middle of the bidirectional screw 71. The second inclined plates 728 are symmetrically distributed on both sides. 12 is slidably connected to L-shaped plate 76. Limiting plate 713 is located above support roller 711. When support roller 711 separates from the plate, bidirectional screw 71 drives gear 75 to rotate. Gear 75 drives toothed plate 727 to descend. Toothed plate 727 drives inclined plate 728 to rotate. Inclined plate 728 drives slide rod 712 to move. Slide rod 712 drives limiting plate 713 to move. Since inclined plates 728 on both sides are symmetrical, limiting plates 713 on both sides move closer to each other. When support roller 711 is completely separated from plate, limiting plates 713 on both sides limit plate, so that plate is suspended in the air, which facilitates inspection of the lower surface of plate.

[0027] Example 2 Based on Example 1, such as Figure 7 - Figure 9As shown, a top groove 714 is provided on the upper side of the limiting plate 713. Two sliders 715 are slidably connected to the inner side of the top groove 714. A stabilizing plate 716 is fixedly connected to one side of the slider 715. A reinforcing plate 717 is fixedly connected to the outer side of the stabilizing plate 716. A rubber block 718 is fixedly connected to the outer side of the reinforcing plate 717. A stabilizing plate 719 is fixedly connected to the other side of the slider 715. A rotating block 720 is fixedly connected to the outer side of the stabilizing plate 719. An inclined plate 721 is rotatably connected to the outer side of the rotating block 720. A rotating block 722 is rotatably connected to the outer side of the inclined plates 721. A control block 723 is fixedly connected to the outer side of the rotating block 722. A connecting block 724 is fixedly connected between block 723 and L-shaped plate 76. Control block 723 is slidably connected to slide rod 712. When limit plate 713 moves, since connecting block 724 and control block 723 are in a fixed state, the inclined plate 1 721 on both sides rotates. Inclined plate 1 721 drives stabilizing plate 2 719 to move. Stabilizing plate 2 719 drives slider 3 715 to move. Slider 3 715 drives stabilizing plate 1 716 to move. Stabilizing plate 1 716 drives reinforcing plate 717 to move. Since the inclined plate 1 721 on both sides is symmetrically distributed, the reinforcing plates 717 on both sides move closer to each other, which makes it convenient for the reinforcing plates 717 to limit the plate again and improve the stability of the plate when it is suspended.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, the sheet material is first placed on the support roller 711. Then, the electric push rod 69 is controlled to move the guide block 62, which in turn moves the industrial camera 616 and laser rangefinder 617 left and right. Simultaneously, the electric push rod 612 is controlled to move the industrial camera 616 and laser rangefinder 617 back and forth, facilitating the inspection of the upper surface of the sheet material. When the lower surface of the sheet material needs to be inspected, the electric push rod 67 is controlled to rotate the rotating plate 65, which in turn rotates the rotating rod 63. The rotating rod 63 then rotates the top plate 610 on the control plate 64, which in turn rotates the industrial camera 616 and laser rangefinder 617, allowing for inspection of the lower surface of the sheet material. During the inspection, the motor 8 is started to control the rotation of the bidirectional screw 71. Under the action of the moving block 72, the second slider 78, the connecting plate 79 and the support frame 710, the support rollers 711 on both sides are separated from the plate. At the same time, the bidirectional screw 71 drives the gear 75 to rotate, the gear 75 drives the toothed plate 727 to descend, and the toothed plate 727 drives the second inclined plate 728 to rotate. Under the action of the slide rod 712, the limiting plates 713 on both sides are brought closer to each other, which facilitates the limiting of the plate. At the same time, under the action of the connecting block 724, the control block 723, the first inclined plate 721 and the third slider 715, the reinforcing plates 717 on both sides limit the plate again, and the plate is in a suspended state, which facilitates the inspection of the lower surface of the plate.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser vision-based intelligent detection device for the flatness of liquefied gas marine steel plates, comprising two mounting plates (1), characterized in that: Two mounting plates (1) are fixedly connected to the outer sides of a U-shaped plate (2). A fixing block (3) is fixedly connected to the outer sides of both sides of the U-shaped plate (2). A limit unit (7) is provided between the two mounting plates (1). A detection unit (6) is provided on the outer side of the U-shaped plate (2). The detection unit (6) includes a guide plate (61), which is fixedly connected to the outer side of the U-shaped plate (2). A guide block (62) is slidably connected to the outer side of the guide plate (61). A rotating rod (63) is rotatably connected to the outer side of the guide block (62). The outer side of the rotating rod (63) is fixedly connected to... A control board (64) is connected to the control board (64). A top plate (610) is fixedly connected to the upper side of the control board (64). A sliding groove (611) is opened on the outer side of the top plate (610). A slider (613) is slidably connected to the inner side of the sliding groove (611). A bottom block (614) is fixedly connected to the lower side of the slider (613). A bottom plate (615) is fixedly connected to the lower side of the bottom block (614). An industrial camera (616) and a laser rangefinder (617) are fixedly connected to the lower side of the bottom plate (615). A bidirectional screw (71) is rotatably connected to the inner side of the U-shaped plate (2). The limiting unit (7) includes multiple moving slots (77). Two of the moving slots (77) are opened on the outside of the mounting plate (1). Two sliders (78) are slidably connected to the inside of the two moving slots (77). A connecting plate (79) is fixedly connected to the outside of the slider (78). A support frame (710) is fixedly connected to the upper side of the two connecting plates (79). Multiple support rollers (711) are provided on the outside of the support frame (710). Both mounting plates (1) are fixedly connected to L-shaped plates (76) on their outer sides. Slide rods (712) are provided on the outer sides of both L-shaped plates (76). One end of each slide rod (712) is fixedly connected to a limit plate (713), and the other end of each slide rod (712) is rotatably connected to an inclined plate (728). A guide rail (725) is fixedly connected to the outer side of each L-shaped plate (76), and a lifting block (726) is slidably connected to the outer side of each guide rail (725). A toothed plate (727) is fixedly connected to the outer side of the lifting block (726). The inclined plate (728) is rotatably connected to the toothed plate (727). A gear (75) that meshes with the toothed plate (727) is fixedly connected to the middle of the bidirectional screw (71). The inclined plates (728) on both sides are symmetrically distributed. The slide rod (712) is slidably connected to the L-shaped plate (76). The limiting plate (713) is located above the support roller (711). A top groove (714) is provided on the upper side. Two sliders (715) are slidably connected to the inner side of the top groove (714). A stabilizing plate (716) is fixedly connected to one side of the slider (715). A reinforcing plate (717) is fixedly connected to the outer side of the stabilizing plate (716). A rubber block (718) is fixedly connected to the outer side of the reinforcing plate (717). A stabilizing plate (719) is fixedly connected to the other side of the slider (715). A rotating block (720) is fixedly connected to the outside of the rotating block (719). An inclined plate (721) is rotatably connected to the outside of the rotating block (720). A rotating block (722) is rotatably connected to the outside of the inclined plate (721) on both sides. A control block (723) is fixedly connected to the outside of the rotating block (722). A connecting block (724) is fixedly connected between the control block (723) and the L-shaped plate (76). The control block (723) is slidably connected to the slide rod (712).

2. The intelligent detection device for the flatness of liquefied gas marine steel plates based on laser vision according to claim 1, characterized in that: A fixing plate (4) is fixedly connected to the outside of the fixing block (3), a support leg (5) is fixedly connected to the outside of the fixing plate (4), a rotating plate (65) is fixedly connected to the outer end of the rotating rod (63), an electric push rod (67) is rotatably connected to the outside of the rotating plate (65), a side block (66) is fixedly connected to the outside of the guide block (62), an installation block (68) is fixedly connected to the outside of the side block (66), the electric push rod (67) is rotatably connected to the installation block (68), an electric push rod (69) is fixedly connected between the fixing block (3) and the side block (66), and an electric push rod (612) that drives the slider (613) to move is fixedly connected to the inside of the slide groove (611).

3. The intelligent detection device for the flatness of liquefied gas marine steel plates based on laser vision according to claim 2, characterized in that: On the same side, the outer sides of the two sliders (78) are fixedly connected to moving blocks (72), and the outer sides of the U-shaped plate (2) are fixedly connected to motors (8).

4. The intelligent detection device for the flatness of liquefied gas marine steel plates based on laser vision according to claim 3, characterized in that: The two ends of the bidirectional screw (71) are provided with opposite threads. The two ends of the bidirectional screw (71) are respectively threaded to the two moving blocks (72) on both sides. The outer ends of the two bidirectional screws (71) on both sides are fixedly connected with pulleys (73). A belt (74) is provided between the two pulleys (73). The helical directions of the two bidirectional screws (71) on both sides are opposite.

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