Horizontal measuring device for quality detection of house building project

Abstract

The application relates to the technical field of house building detection, in particular to a horizontal measurement device for house building project quality detection, which comprises a ruler edge visualization module; the ruler edge visualization module is arranged in a sliding groove on one side of a second unit measurement ruler, one end of a data line is detachably connected with a display screen, and the display screen is fixed on the surface of a first unit measurement ruler; wherein the inner side of the side surface of the second unit measurement ruler is further embedded with a rotatable extension support leverage module for detecting personnel to hold and support one end of the second unit measurement ruler away from the first unit measurement ruler; the camera on the surface of the mounting plate can transmit the picture of the contact area between the second unit measurement ruler and the wall surface to the display screen through the data line, the detecting personnel can directly understand the situation of the contact area between the second unit measurement ruler and the wall surface by displaying the picture on the display screen, and the light supplementing lamp is used for light supplementing under insufficient light, thereby improving the detection quality of the detecting personnel to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of building construction inspection technology, specifically a level measuring device for quality inspection of building construction projects. Background Technology

[0002] When conducting quality inspections on building construction, a two-meter straightedge is often used. The two-meter straightedge is a commonly used inspection tool in the fields of construction, decoration and engineering. Its core function is to measure the flatness and verticality of surfaces such as walls and floors, and to determine whether the surface meets the construction specifications. The core uses of the two-meter straightedge are flatness inspection and verticality inspection. Verticality testing involves placing a straightedge vertically on the wall and using the built-in bubble level or a feeler gauge to measure the vertical deviation between the wall and the floor (the allowable deviation for wall verticality is usually ≤2mm). Flatness testing involves placing the smooth side of a straightedge firmly against the wall. There are two ways to judge flatness: one is to observe directly with the human eye, by moving the head to observe the contact area between the straightedge and the wall to determine whether the surface is flat; the other is to insert a wedge gauge into the gap between the straightedge and the surface and read the maximum gap value to determine whether the surface is flat (the allowable deviation for wall flatness is usually ≤3mm). In actual flatness testing, the straightedge is not only placed horizontally to check the flatness of the wall surface. Sometimes it needs to be tilted, with one end pointing upwards, to measure the flatness of the upper part of the wall surface. In this way, because one side of the straightedge is high, it is inconvenient to use a wedge gauge for accurate measurement. Generally, human observation is used. However, since the testing site is usually located indoors, the lighting is insufficient. At the same time, the straightedge is tilted, and the inspector cannot move their head to observe the contact area between the straightedge and the wall surface, which leads to observation errors and inaccurate wall surface testing. Therefore, a horizontal measuring device for building construction quality inspection is proposed to address the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a level measuring device for quality inspection of building construction projects, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: As an optional solution of the horizontal measuring device for quality inspection of building construction projects according to the present invention, the horizontal measuring device for quality inspection of building construction projects includes a straightedge edge visualization module, a data cable and a display screen. The edge visualization module of the straightedge is set inside the groove opened on one side of the measuring straightedge of the second unit, and a data cable for data transmission is also installed on the outside of the edge visualization module of the straightedge. The other end of the data cable is detachably connected to a display screen, which is fixed on the surface of the measuring straightedge of the first unit. Among them, the side interior of the second unit measuring ruler is also embedded with a rotatable extension support lever module for the testing personnel to hold and support the end of the second unit measuring ruler away from the first unit measuring ruler. The straightedge edge visualization module includes a mounting plate set on the outside of the measuring straightedge in the second unit. A camera is mounted on one side of the mounting plate, and a data cable is fixedly connected to the outside of the camera. The other end of the data cable is detachably connected to the display screen. A movable frame is installed on the other side of the mounting plate. The movable frame slides inside the measuring straightedge of the second unit via a groove.

[0005] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, a drive motor is installed on one side of the moving frame, a rotating roller is fixedly connected to the end of the main shaft of the drive motor, a rotating disk is fixedly connected to the other side of the rotating roller, a rotating column is fixedly connected to the other side of the rotating disk, a fixed ring is rotatably connected to the outside of the rotating column, a connecting rod is fixedly connected to the outside of the fixed ring and passes through one side of the moving frame, and the other end of the connecting rod passes through the mounting plate and is rotatably connected to a laser light.

[0006] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, the first unit measuring ruler and the second unit measuring ruler are connected by a hinge mechanism.

[0007] As an optional solution to the horizontal measuring device for quality inspection of building construction projects described in this invention, a supplementary light for supplementing the measurement area is also installed on one side of the camera.

[0008] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, the outer diameter of the rotating disk is smaller than the outer diameter of the rotating roller.

[0009] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, the side of the moving frame away from the mounting plate is open, and the side of the rotating roller away from the mounting plate is protruding compared to the end face of the moving frame away from the mounting plate.

[0010] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, a rotating ring is fixedly connected to the outside of the laser lamp, a rotating seat is rotatably connected to the outside of the rotating ring, and the other side of the rotating seat is fixedly connected to the mounting plate.

[0011] When inspecting the quality of a building, the verticality and flatness of the interior walls are generally checked. Flatness testing involves placing a straightedge with its smooth side pressed against the wall. There are two methods to judge flatness: one is direct visual observation, where the person can move their head to observe the contact area between the straightedge and the wall to determine if the surface is flat; the other is using a wedge gauge inserted into the gap between the straightedge and the surface to read the maximum gap value to determine if the surface is flat. In actual flatness testing, the straightedge is not always placed horizontally. Sometimes it needs to be tilted, with one end pointing upwards. In this case, because one side of the straightedge is higher, it's inconvenient to use a wedge gauge for precise measurement, and visual observation is generally used. However, since the testing site is usually indoors with insufficient lighting, and the tilted straightedge prevents the inspector from moving their head to observe the contact area between the straightedge and the wall, this results in inaccurate wall surface testing.

[0012] By setting a visual module for the edge of the measuring ruler on one side of the second unit measuring ruler, when measuring the flatness of the wall, when the ruler is tilted to detect the inclination of the upper part of the wall, the camera on the surface of the mounting plate moves evenly and transmits the image of the contact area between the second unit measuring ruler and the wall to the display screen via a data cable. The inspector can directly see the situation of the contact area between the second unit measuring ruler and the wall through the display screen. In addition, a supplementary light is also set on one side of the camera to provide supplementary lighting in the case of insufficient light, to ensure image quality and improve the inspection quality of the inspector to a certain extent. In use, the moving frame is placed inside the slide groove through one end of the slide groove. The drive motor is started and drives the rotating roller to rotate. The rotating roller contacts the end face of the slide groove away from the mounting plate. At this time, it can be ensured that the moving frame and the mounting plate are moved evenly under the action of the rotating roller, so that the camera can capture the image of the area where the second unit measuring ruler is in contact with the wall. When filming the area where the measuring ruler contacts the wall in the second unit, the lack of reference points in the frame can easily lead to misjudgments by inspectors if the image freezes. Therefore, a rotatable laser light is installed on the surface of the mounting plate. When the drive motor rotates the rotating roller, the roller drives the rotating disk to rotate. Through the cooperation of the rotating column, the fixed ring, and the connecting rod, the laser light can swing. The light spot emitted by the laser light swings constantly in the frame, making it convenient for inspectors to judge the real-time transmission of the image through the dynamic light spot.

[0013] As an optional solution of the horizontal measuring device for quality inspection of building construction projects described in this invention, the extended support lever module includes a rotating frame that is rotatably connected to the second unit measuring ruler. A slider is slidably connected inside the rotating frame. A threaded rod is fixedly connected to one side of the slider. The other end of the threaded rod is threaded. A locking nut is helically connected to the threaded rod. An adjusting sleeve is rotatably connected to one side of the locking nut. A handle is fixedly connected to the other end of the adjusting sleeve.

[0014] As an optional embodiment of the horizontal measuring device for quality inspection of building construction projects described in this invention, the surface of the rotating frame is provided with a first connecting hole, and a positioning pin is provided in one of the holes; the surface of the adjusting sleeve is provided with a second connecting hole, for the positioning pin to be inserted into the second connecting hole through the first connecting hole and fixed to the adjusting sleeve.

[0015] When using the second unit measuring ruler to test the flatness of the wall, because one side of the second unit measuring ruler is in a high position, it is inconvenient for the inspector to press the high part of the second unit measuring ruler, resulting in a situation where the second unit measuring ruler is not tightly attached to the wall. By rotating the set rotating frame to extend the second unit measuring ruler, sliding the adjusting sleeve, and connecting the locking nut to the threaded rod, the inspector can hold the handle and use the adjusting sleeve, threaded rod, slider, and rotating frame to press the high part of the second unit measuring ruler to ensure that one side of the second unit measuring ruler is tightly attached to the wall, thus ensuring the accuracy of the test.

[0016] As an optional solution of the horizontal measuring device for quality inspection of building construction projects described in this invention, a limiting component is also provided on the outside of the data cable, which is rotatably connected to the second unit measuring ruler. The limiting component includes a limiting frame rotatably connected to the second unit measuring ruler. A limiting rod is rotatably connected to one side of the limiting frame, and a first magnet is fixedly connected to the other end of the limiting rod. A second magnet is provided on one side of the first magnet, which is fixedly connected to the limiting frame.

[0017] The data cable is positioned inside the limiting frame and is limited by the limiting rod to prevent it from swinging freely when the visual module moves along the edge of the ruler. The opposite ends of the first and second magnets are set with opposite poles, which attract each other to fix the limiting rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are: By setting a visual module for the edge of the measuring ruler on one side of the second unit measuring ruler, when measuring the flatness of the wall, when the ruler is tilted to detect the inclination of the upper part of the wall, the camera on the surface of the mounting plate moves evenly and transmits the image of the contact area between the second unit measuring ruler and the wall to the display screen via a data cable. The inspector can directly see the situation of the contact area between the second unit measuring ruler and the wall through the display screen. In addition, a supplementary light is also set on one side of the camera to provide supplementary lighting in the case of insufficient light, to ensure image quality and improve the inspection quality of the inspector to a certain extent. In use, the moving frame is placed inside the slide groove through one end of the slide groove. The drive motor is started and drives the rotating roller to rotate. The rotating roller contacts the end face of the slide groove away from the mounting plate. At this time, it can be ensured that the moving frame and the mounting plate are moved evenly under the action of the rotating roller, so that the camera can capture the image of the area where the height of the measuring ruler of the tilted second unit contacts the wall. When filming the area where the measuring ruler at the height of the second unit contacts the wall, the lack of reference objects in the frame can easily lead to misjudgment by the inspectors if the image freezes. Therefore, a rotatable laser light is installed on the surface of the mounting plate. When the drive motor drives the rotating roller to rotate, the rotating roller drives the rotating disk to rotate. With the cooperation of the rotating column, the fixed ring and the connecting rod, the laser light can swing. The light spot emitted by the laser light swings in the frame, which makes it convenient for the inspectors to judge the real-time transmission of the image through the dynamic light spot. When using the second unit measuring ruler to test the flatness of the wall, because one side of the second unit measuring ruler is in a high position, it is inconvenient for the inspector to press the high part of the second unit measuring ruler, resulting in a situation where the second unit measuring ruler is not tightly attached to the wall. By rotating the set rotating frame to extend the second unit measuring ruler, sliding the adjusting sleeve, and connecting the locking nut to the threaded rod, the inspector can hold the handle and use the adjusting sleeve, threaded rod, slider, and rotating frame to press the high part of the second unit measuring ruler to ensure that one side of the second unit measuring ruler is tightly attached to the wall, thus ensuring the accuracy of the test. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a horizontal measuring device for quality inspection of building construction projects; Figure 2 A schematic diagram of the structure of an extension support and leverage module for a horizontal measuring device used in quality inspection of building construction projects; Figure 3 A schematic diagram of the adjusting sleeve of a horizontal measuring device for quality inspection of building construction projects; Figure 4 A schematic diagram of a limiting component for a horizontal measuring device used for quality inspection in building construction projects; Figure 5 A schematic diagram of the structure of a visual module for the edge of a ruler in a horizontal measuring device used for quality inspection of building construction projects; Figure 6 This is a cross-sectional view of the moving frame of a horizontal measuring device used for quality inspection of building construction projects.

[0020] In the diagram: 1. First unit measuring ruler; 2. Second unit measuring ruler; 3. Extension support and leverage module; 301. Rotating frame; 302. Slider; 303. Threaded rod; 304. Adjusting sleeve; 305. Locking nut; 306. Handle; 307. Positioning pin; 4. Limiting component; 401. Limiting frame; 402. Limiting rod; 403. First magnet; 404. Second magnet; 5. Slide groove; 6. Ruler edge visualization module; 601. Mounting plate; 602. Camera; 603. Fill light; 604. Rotating seat; 605. Rotating ring; 606. Laser light; 607. Connecting rod; 608. Fixing ring; 609. Moving frame; 610. Drive motor; 611. Rotating roller; 612. Rotating disk; 613. Rotating column; 7. Data cable; 8. Display screen. Detailed Implementation

[0021] Example 1: Please refer to Figure 1 , Figure 5 and Figure 6 The present invention provides a technical solution: A horizontal measuring device for quality inspection of building construction projects includes a straightedge edge visualization module 6, a data cable 7, and a display screen 8; The edge visualization module 6 of the straightedge is set inside the groove 5 opened on one side of the measuring straightedge 2 of the second unit, and a data cable 7 for data transmission is also installed on the outside of the edge visualization module 6 of the straightedge. The other end of the data cable 7 is detachably connected to the display screen 8, and the display screen 8 is fixed on the surface of the measuring straightedge 1 of the first unit. Among them, the side interior of the second unit measuring ruler 2 is also embedded with an extension support lever module 3 that can be rotated for the testing personnel to hold and support the end of the second unit measuring ruler 2 away from the first unit measuring ruler 1. The ruler edge visualization module 6 includes a mounting plate 601 set on the outside of the second unit measuring ruler 2. A camera 602 is mounted on one side of the mounting plate 601. A data cable 7 is fixedly connected to the outside of the camera 602. The other end of the data cable 7 is detachably connected to the display screen 8. A movable frame 609 is installed on the other side of the mounting plate 601. The movable frame 609 slides inside the measuring ruler 2 of the second unit through the slide groove 5.

[0022] A drive motor 610 is installed on one side of the moving frame 609. A rotating roller 611 is fixedly connected to the end of the main shaft of the drive motor 610. A rotating disk 612 is fixedly connected to the other side of the rotating roller 611. A rotating column 613 is fixedly connected to the other side of the rotating disk 612. A fixing ring 608 is rotatably connected to the outside of the rotating column 613. A connecting rod 607 that passes through one side of the moving frame 609 is fixedly connected to the outside of the fixing ring 608. The other end of the connecting rod 607 passes through the mounting plate 601 and is rotatably connected to a laser light 606.

[0023] The first unit measuring ruler 1 and the second unit measuring ruler 2 are connected by a hinge mechanism.

[0024] A supplementary light 603 is also installed on one side of the camera 602 to provide supplementary lighting for the measurement area.

[0025] The outer diameter of the rotating disk 612 is smaller than the outer diameter of the rotating roller 611.

[0026] The side of the movable frame 609 away from the mounting plate 601 is open, and the side of the rotating roller 611 away from the mounting plate 601 is protruding compared to the end face of the movable frame 609 away from the mounting plate 601.

[0027] A rotating ring 605 is fixedly connected to the outer side of the laser light 606, and a rotating seat 604 is rotatably connected to the outer side of the rotating ring 605. The other side of the rotating seat 604 is fixedly connected to the mounting plate 601.

[0028] When inspecting the quality of a house, the verticality and flatness of the interior walls are generally checked. Flatness is tested by placing the smooth side of a straightedge against the wall. There are two ways to judge flatness: one is to observe directly with the naked eye, by moving the head to observe the contact area between the straightedge and the wall to determine whether the plane is flat; the other is to insert a wedge gauge into the gap between the straightedge and the surface and read the maximum gap value to determine whether the plane is flat (e.g., the allowable deviation for wall flatness is usually ≤3mm). In actual flatness testing, the straightedge is not only placed horizontally to check the flatness of the wall surface. Sometimes it needs to be tilted, with one end pointing upwards, to measure the flatness of the upper part of the wall surface. In this method, because one side of the straightedge is relatively high, it is inconvenient to use a wedge gauge for accurate measurement. Generally, visual observation is used. However, since the testing site is usually indoors, there may be insufficient lighting. Furthermore, the tilted straightedge prevents the inspector from moving their head to specifically observe the contact area between the straightedge and the wall, leading to observation errors and inaccurate wall surface testing. This invention addresses this issue by measuring the straightedge 2 in the second unit. A visual module 6 for the edge of the ruler is set on the side. When measuring the flatness of the wall, when the ruler is placed at an angle to detect the inclination of the upper part of the wall, it is moved evenly by the mounting plate 601. The camera 602 on the surface of the mounting plate 601 can transmit the image of the contact area between the second unit measuring ruler 2 and the wall to the display screen 8 through the data cable 7 and display it. The inspector can directly see the situation of the contact area between the second unit measuring ruler 2 and the wall through the display screen 8. In addition, a supplementary light 603 is also set on one side of the camera 602 to supplement the light in the case of insufficient light, to ensure the image quality and improve the inspection quality of the inspector to a certain extent. In use, the moving frame 609 is placed inside the slide 5 through one end of the slide 5. The drive motor 610 is started and drives the rotating roller 611 to rotate. The rotating roller 611 contacts the end face of the slide 5 away from the mounting plate 601. At this time, it can be ensured that the moving frame 609 and the mounting plate 601 move evenly under the action of the rotating roller 611, so that the camera 602 can capture the image of the area where the second unit measuring ruler 2 contacts the wall at its height. When filming the area where the measuring ruler 2 in the second unit contacts the wall, there are no reference objects in the image. If the image freezes, it can easily lead to misjudgment by the inspectors. Therefore, a rotatable laser light 606 is also installed on the surface of the mounting plate 601. When the drive motor 610 drives the rotating roller 611 to rotate, the rotating roller 611 drives the rotating disk 612 to rotate. With the cooperation of the rotating column 613, the fixing ring 608 and the connecting rod 607, the laser light 606 can swing. The light spot emitted by the laser light 606 swings in the image, which makes it convenient for the inspectors to judge the real-time transmission status of the image through the dynamic light spot. Also includes the following: A guide section is provided on the side of the slide 5 near the measuring ruler 1 of the first unit, which facilitates the placement of the ruler edge visualization module 6. The rotating roller 611 is driven to rotate by the drive motor 610. A rubber friction sleeve is provided on the outside of the rotating roller 611 to increase the friction with the inner side of the slide 5 and ensure stable movement of the moving frame 609 inside the slide 5. Meanwhile, rectangular slots are provided on both the side of the movable frame 609 facing the mounting plate 601 and the outer side of the mounting plate 601, facilitating the movement of the connecting rod 607 within the rectangular slots. This ensures that the rotating disk 612 drives the rotating column 613 to rotate, and the rotating column 613 is located on one side of the outer periphery of the rotating disk 612, thereby driving the fixed ring 608 and the connecting rod 607 to move, ultimately driving the laser lamp 606 to reciprocate. The rotating seat 604 ensures that the rotating ring 605 rotates, ensuring that the laser lamp 606 can reciprocate normally, facilitating reference for testing personnel and ensuring testing quality. The diameter of the rotating disk 612 is smaller than the outer side of the rotating roller 611, which ensures that the rotating roller 611 is in contact with the inside of the second unit measuring ruler 2, thereby driving the moving frame 609 to move stably. At the same time, one side of the moving frame 609 is open, which makes it convenient for one side of the rotating roller 611 to protrude relative to one side of the moving frame 609, ensuring that the rotating roller 611 is in contact with the inside of the second unit measuring ruler 2.

[0029] Example 2: This example is an improvement upon Example 1. Please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 Specifically, the extended support lever module 3 includes a rotating frame 301 that is rotatably connected to the second unit measuring ruler 2. A slider 302 is slidably connected inside the rotating frame 301. A threaded rod 303 is fixedly connected to one side of the slider 302. The other end of the threaded rod 303 is threaded. A locking nut 305 is screwed to the threaded rod 303. An adjusting sleeve 304 is rotatably connected to one side of the locking nut 305. A handle 306 is fixedly connected to the other end of the adjusting sleeve 304.

[0030] The surface of the rotating frame 301 is provided with a first connecting hole, and a positioning pin 307 is provided in one of the holes. The surface of the adjusting sleeve 304 is provided with a second connecting hole, which is used for the positioning pin 307 to be inserted into the second connecting hole through the first connecting hole and fixed to the adjusting sleeve 304.

[0031] When the second measuring ruler 2 is used to test the flatness of the wall, because one side of the second measuring ruler 2 is in a high position, it is inconvenient for the tester to press the high part of the second measuring ruler 2. This results in the second measuring ruler 2 not fitting tightly against the wall, leading to inaccurate measurements. The second measuring ruler 2 is rotated out by the rotating frame 301, the sliding adjustment sleeve 304 is slidable, and the locking nut 305 is connected to the threaded rod 303. The tester holds the handle 306, and at this time, the high part of the second measuring ruler 2 can be pressed with the adjustment sleeve 304, the threaded rod 303, the slider 302, and the rotating frame 301 to ensure that one side of the second measuring ruler 2 fits tightly against the wall, thus ensuring the accuracy of the test. Also includes the following: When not in use, the adjusting sleeve 304 slides, positioned outside the threaded rod 303. The locating pin 307 is inserted into the first connecting hole on the outside of the rotating frame 301, and the first connecting hole engages with the second connecting hole on the outside of the adjusting sleeve 304 to achieve the purpose of fixing the adjusting sleeve 304. Figure 2 (For example) In use, the surface of the slider 302 is provided with a third connecting hole. The positioning pin 307 is inserted into the first connecting hole on the outside of the rotating frame 301 and connected to the slider 302 through the third connecting hole on the slider 302. This can achieve the purpose of fixing the slider 302, making it convenient for the testing personnel to hold the handle 306 and press the high position of the second unit measuring ruler 2, ensuring that the second unit measuring ruler 2 is in close contact with the wall.

[0032] Example 3: This example is an improvement on Example 2. Please refer to [link / reference]. Figure 4 Specifically, the data cable 7 is also provided with a limiting member 4 that is rotatably connected to the second unit measuring ruler 2. The limiting member 4 includes a limiting frame 401 that is rotatably connected to the second unit measuring ruler 2. A limiting rod 402 is rotatably connected to one side of the limiting frame 401. A first magnet 403 is fixedly connected to the other end of the limiting rod 402. A second magnet 404 that is fixedly connected to the limiting frame 401 is provided on one side of the first magnet 403.

[0033] The data cable 7 is set inside the limiting frame 401 and is limited by the limiting rod 402 to prevent the data cable 7 from shaking randomly when the visual module 6 at the edge of the ruler moves. The opposite ends of the first magnet 403 and the second magnet 404 are set with opposite poles, which attract each other to fix the limiting rod 402. Also includes the following: The limiting frame 401 is rotatably connected to the first unit measuring ruler 1, and the second unit measuring ruler 2 on one side of the limiting frame 401 is provided with an inner groove. When not in use, the limiting part 4 can be rotated to be located in the inner groove, thereby protecting the limiting frame 401, while keeping the whole flat and beautiful.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A level measuring device for quality inspection of building construction projects, characterized in that: Includes a ruler edge visualization module (6), a data cable (7), and a display screen (8); The edge visualization module (6) of the ruler is set inside the groove (5) opened on one side of the measuring ruler (2) of the second unit, and a data cable (7) for data transmission is also installed on the outside of the edge visualization module (6). The other end of the data cable (7) is detachably connected to the display screen (8), and the display screen (8) is fixed on the surface of the measuring ruler (1) of the first unit. Among them, the side of the second unit measuring ruler (2) is also embedded with an extension support lever module (3) that can be rotated for the testing personnel to hold and support the end of the second unit measuring ruler (2) away from the first unit measuring ruler (1). The edge visualization module (6) of the ruler includes a mounting plate (601) set on the outside of the measuring ruler (2) of the second unit. A camera (602) is installed on one side of the mounting plate (601). A data cable (7) is fixedly connected to the outside of the camera (602). The other end of the data cable (7) is detachably connected to the display screen (8). A movable frame (609) is installed on the other side of the mounting plate (601). The movable frame (609) slides inside the measuring ruler (2) of the second unit through the slide groove (5). A drive motor (610) is installed on one side of the movable frame (609). A rotating roller (611) is fixedly connected to the end of the main shaft of the drive motor (610). A rotating disk (612) is fixedly connected to the other side of the rotating roller (611). A rotating column (613) is fixedly connected to the other side of the rotating disk (612). A fixing ring (608) is rotatably connected to the outside of the rotating column (613). A connecting rod (607) that passes through one side of the movable frame (609) is fixedly connected to the outside of the fixing ring (608). The other end of the connecting rod (607) passes through the mounting plate (601) and is rotatably connected to a laser lamp (606). The outer diameter of the rotating disk (612) is smaller than the outer diameter of the rotating roller (611); A rotating ring (605) is fixedly connected to the outside of the laser light (606), and a rotating seat (604) is rotatably connected to the outside of the rotating ring (605). The other side of the rotating seat (604) is fixedly connected to the mounting plate (601). The extended support lever module (3) includes a rotating frame (301) that is rotatably connected to the second unit measuring ruler (2). A slider (302) is slidably connected inside the rotating frame (301). A threaded rod (303) is fixedly connected to one side of the slider (302). The other end of the threaded rod (303) is threaded. A locking nut (305) is screwed to the threaded rod (303). An adjusting sleeve (304) is rotatably connected to one side of the locking nut (305). A handle (306) is fixedly connected to the other end of the adjusting sleeve (304). The rotating frame (301) has a first connecting hole on its surface, and a positioning pin (307) is provided in one of the holes. The adjusting sleeve (304) has a second connecting hole on its surface, so that the positioning pin (307) can be inserted into the second connecting hole through the first connecting hole and fixed to the adjusting sleeve (304).

2. The level measuring device for quality inspection of building construction projects according to claim 1, characterized in that: The first unit measuring ruler (1) and the second unit measuring ruler (2) are connected by a hinge mechanism.

3. A level measuring device for quality inspection of building construction projects according to claim 1, characterized in that: A supplementary light (603) is also installed on one side of the camera (602) to provide supplementary lighting for the measurement area.

4. A level measuring device for quality inspection of building construction projects according to claim 1, characterized in that: The side of the movable frame (609) away from the mounting plate (601) is open, and the side of the rotating roller (611) away from the mounting plate (601) is protruding compared to the side of the movable frame (609) away from the mounting plate (601).

5. A level measuring device for quality inspection of building construction projects according to claim 1, characterized in that: The data cable (7) is also provided with a limiting member (4) that is rotatably connected to the second unit measuring ruler (2). The limiting member (4) includes a limiting frame (401) that is rotatably connected to the second unit measuring ruler (2). A limiting rod (402) is rotatably connected to one side of the limiting frame (401). A first magnet (403) is fixedly connected to the other end of the limiting rod (402). A second magnet (404) that is fixedly connected to the limiting frame (401) is provided on one side of the first magnet (403).

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