Flatness detection device for road and bridge engineering construction

Abstract

The invention discloses a flatness detection device for road and bridge engineering construction, and relates to the technical field of flatness detection devices.The flatness detection device comprises a rack and moving wheels rotationally installed at the four corners of the rack and used for moving, a push handle is fixedly installed on one side of the top of the rack, and a control panel is fixedly installed on the top of the rack; a ground attaching mechanism and a laser detection mechanism are installed at the bottom of the rack, and the laser detection mechanism is arranged over the ground attaching mechanism. According to the flatness detection device for road bridge engineering construction, the ground attaching mechanism is in direct contact with a road bridge construction surface to reflect the flatness condition of the construction surface, then the laser detection mechanism is matched with the ground attaching mechanism, the flatness of the construction surface is calculated according to the laser receiving condition, and the detection accuracy is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness detection devices, and particularly to a flatness detection device for road and bridge engineering construction. Background Art

[0002] In road and bridge engineering construction, flatness is one of the key indicators to measure the project quality. It not only affects the aesthetics of roads and bridges, but also has a profound impact on the safety, comfort of driving, and the durability of structures;

[0003] Traditional road and bridge flatness detection methods have exposed many drawbacks in practical applications. Taking the 3m straightedge detection method as an example, this method mainly relies on manual placement of the straightedge on the road surface and judges the flatness by visually observing the gap between the straightedge and the road surface. This process not only has extremely low detection efficiency, and each detection can only cover the road surface within the length range of the straightedge, with a limited detection range, but also completely relies on manual measurement and judgment, with extremely strong subjectivity. Due to differences in experience and judgment criteria among different detection personnel, the detection results often have large errors, making it difficult to ensure the accuracy and reliability of the detection data;

[0004] Although the level detection method has a certain improvement in accuracy compared with the 3m straightedge detection method, the operation process is quite complex. By setting up levels and scales at different measurement points, precise leveling measurements are carried out, and then the measurement data is subjected to cumbersome calculations and analyses. This process is laborious and the detection speed is extremely slow, making it difficult to meet the requirements of rapid detection. Summary of the Invention

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions: A flatness detection device for road and bridge engineering construction, comprising:

[0006] A frame, and moving wheels rotatably installed at the four corners of the frame for movement, the moving wheels enabling the device to move flexibly to realize the flatness detection of construction surfaces at different positions. One side of the top of the frame is fixedly installed with a push handle for an operator to hold, and the movement direction and position of the device are controlled by pushing the push handle to facilitate the detection operation. The top of the frame is fixedly installed with a control panel;

[0007] A ground-contact mechanism installed at the bottom of the frame, which is in direct contact with the road and bridge construction surface to reflect the flatness of the construction surface;

[0008] A laser detection mechanism installed at the bottom of the frame, which is arranged directly above the ground-contact mechanism, and the laser detection mechanism calculates the flatness of the construction surface according to the laser reception situation;

[0009] Among them, the laser detection mechanism includes a first mounting plate and a second mounting plate. The first mounting plate and the second mounting plate are respectively fixedly installed on both sides of the bottom of the frame. A laser emitter is fixedly installed on the surface of the first mounting plate, and a laser receiver is fixedly installed on the surface of the second mounting plate. A connecting plate is fixedly connected between the first mounting plate and the second mounting plate. A second round hole is formed on the surface of the connecting plate, and a light-transmitting mechanism is installed inside the second round hole. The light-transmitting mechanism can transmit or block the laser light emitted by the laser emitter according to the flatness of the construction surface.

[0010] Preferably, the laser emitters are evenly distributed along the first mounting plate, and the laser receivers are evenly distributed along the second mounting plate. The number of both the laser emitters and the laser receivers is seven, and the seven laser emitters and laser receivers are arranged oppositely. The laser emitters emit laser light, and the laser receivers receive the laser light emitted by the laser emitters, thereby detecting the flatness of the construction surface of the road bridge.

[0011] Preferably, the number of the second round holes is forty-two, and the forty-two second round holes are arranged in a regular array. The second round holes are arranged in six rows and seven columns, and one column of the second round holes is arranged parallel to the center connection line of the laser emitters and the laser receivers. The second round holes provide installation positions for the light-transmitting mechanism.

[0012] Preferably, the light-transmitting mechanism includes a second sliding column and a telescopic hose. The second sliding column is slidably installed inside the second round hole. A second pushing block is fixedly installed at the bottom of the second sliding column. The telescopic hose is fixedly installed on the top of the connecting plate. The top of the second sliding column is fixedly connected to the top of the inner cavity of the telescopic hose. A light-blocking cone is fixedly installed on the top of the telescopic hose. A light-transmitting hole is formed on the surface of the light-blocking cone. The telescopic hose is used to connect the second sliding column and the light-blocking cone. When the second sliding column moves up and down, the telescopic hose expands and contracts accordingly, changing the height of the light-blocking cone, and further changing the relative position between the light-transmitting hole and the laser light.

[0013] Preferably, the light-transmitting hole is arranged in the horizontal direction, and the aperture size of the light-transmitting hole matches the diameter of the laser light emitted by the laser emitter. When the position of the light-transmitting hole changes due to the unevenness of the construction surface, the propagation path of the laser light changes and is received by the laser receiver for calculating the flatness.

[0014] Preferably, the ground attachment mechanism includes a mounting block. A strip-shaped groove is formed at the bottom of the mounting block. A first round hole is formed at the top of the strip-shaped groove. Slide grooves are formed on both sides of the inner wall of the first round hole. A return spring is fixedly installed inside the slide grooves. A ground attachment member is slidably installed inside the first round hole. The strip-shaped groove provides space for the up-and-down movement of the ground attachment member, enabling the ground attachment member to closely fit construction surfaces with different flatness levels. Counterweight blocks are fixedly installed at the four corners of the bottom of the mounting block. The counterweight blocks increase the overall weight of the ground attachment mechanism, enabling the ground attachment rollers to more closely fit the construction surface and improving the accuracy of detection. Connecting members are rotatably installed on both sides of the mounting block. The ground attachment mechanism is connected to the frame through the connecting members.

[0015] Preferably, the number of the strip-shaped grooves is six, and the number of the first round holes is forty-two. The forty-two first round holes are arranged in a regular array. The first round holes are arranged in six rows and seven columns. A column of second round holes is evenly arranged at the top of the strip-shaped groove.

[0016] Preferably, the ground attachment member includes a first sliding column. Sliders are fixedly installed on both sides of the first sliding column. A bracket is fixedly installed at the bottom of the first sliding column. A rotating shaft is rotatably installed inside the bracket. A ground attachment roller is fixedly installed on the surface of the rotating shaft. The ground attachment roller directly contacts the construction surface of the road bridge. Its rolling process can reflect the flatness of the construction surface. A first pushing block is fixedly installed at the top of the first sliding column.

[0017] Preferably, the sliders are slidably installed inside the slide grooves. The top of the sliders is fixedly connected to the bottom of the return spring. Both the first pushing block and the second pushing block are hemispherical structures and are adapted to be pressed against each other. When the ground attachment roller moves up and down due to the unevenness of the construction surface, the displacement is transmitted to the second pushing block through the first pushing block, thereby causing the light-transmitting mechanism to perform corresponding actions.

[0018] Preferably, the connecting member includes a rotating plate. The rotating plate is rotatably installed on both sides of the mounting block through a rotating shaft. A sleeve plate is sleeved at one end of the rotating plate away from the mounting block. The other end of the sleeve plate is rotatably installed at the bottom of the frame through a rotating shaft. A buffer spring is fixedly connected between the rotating plate and the sleeve plate. The buffer spring is arranged inside the sleeve plate. When the device moves on an uneven road surface, the buffer spring absorbs and buffers the impact force generated by the road surface bumps, reducing the impact on the laser detection mechanism and ensuring the detection accuracy.

[0019] The present invention provides a flatness detection device for road and bridge engineering construction. It has the following beneficial effects:

[0020] 1. The flatness detection device for road and bridge engineering construction is equipped with a ground-contacting mechanism. When the device moves, the ground-contacting roller contacts the construction surface. The uneven construction surface causes the roller to move up and down. The sliders on both sides of the slide column slide in the slide groove, stretching or compressing the reset spring. The counterweight block increases the overall weight of the ground-contacting mechanism, making the ground-contacting roller fit the construction surface more closely. The ground-contacting mechanism truly reflects the flatness of the construction surface, greatly improving the accuracy of the detection.

[0021] 2. The flatness detection device for the construction of road and bridge projects, through the setting of laser detection mechanism, the laser transmitter emits laser light, the light passes through the light-transmitting mechanism and is shot to the laser receiver and received by it, multiple laser transmitters and receivers are distributed at equal intervals and set opposite to each other, which can perform multi-point detection on the construction surface of the road and bridge, greatly improving the detection efficiency. At the same time, the data of multiple detection points verify each other, making the detection result more comprehensive and accurate.

[0022] 3. The flatness detection device for road and bridge engineering construction, through the setting of the light-transmitting mechanism, the movement of the ground-contacting roller drives the push block one, and the push block one squeezes the push block two, so that the slide column two slides up and down in the circular hole two, thereby driving the telescopic hose to extend and retract, changing the height of the light-blocking cone block, and changing the relative position of the light-transmitting hole and the laser light, affecting the propagation path of the laser light. When the construction surface is uneven, the mechanism can timely convert the displacement of the ground-contacting roller into a change in the propagation path of the laser light. By accurately controlling the relative position of the light-transmitting hole and the laser light, the light changes received by the laser receiver can more sensitively reflect the flatness changes of the construction surface, further improving the detection device's detection ability for tiny flatness differences and enhancing the detection accuracy.

[0023] 4. The flatness detection device for the construction of road and bridge projects, through the setting of push block 1 and push block 2, the up and down movement of the ground-contacting parts caused by the uneven construction surface is transmitted to push block 2 through push block 1, thereby actuating the light-transmitting mechanism and changing the propagation of laser light, thereby realizing the effective linkage between the ground-contacting mechanism and the laser detection mechanism, ensuring that the laser detection mechanism can adjust the detection parameters in real time according to the actual situation of the construction surface, ensuring the continuity of the detection process and the accuracy of the detection data, and improving the collaborative working ability of the entire detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a bottom schematic diagram of the present invention;

[0026] Figure 3 This is a position relationship diagram of the ground contact mechanism and the laser detection mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the assembly of the ground-attaching mechanism of the present invention;

[0028] Figure 5 This is the assembly schematic diagram of the laser detection mechanism of the present invention;

[0029] Figure 6 This is the structural schematic diagram of the ground - contacting mechanism of the present invention;

[0030] Figure 7 This is the structural schematic diagram of the mounting block of the present invention;

[0031] Figure 8 This is the enlarged schematic diagram of part A of the present invention;

[0032] Figure 9 This is the structural schematic diagram of the ground - contacting part of the present invention;

[0033] Figure 10 This is the structural schematic diagram of the connecting part of the present invention;

[0034] Figure 11 This is the structural schematic diagram of the laser detection mechanism of the present invention;

[0035] Figure 12 This is the external appearance schematic diagram of the laser detection mechanism of the present invention;

[0036] Figure 13 This is the structural schematic diagram of the light - transmitting mechanism of the present invention.

[0037] In the figure: 1, frame; 2, moving wheel; 3, push handle; 4, ground - contacting mechanism; 41, mounting block; 42, strip - shaped groove; 43, round hole 1; 44, sliding groove; 45, return spring; 46, ground - contacting part; 461, sliding column 1; 462, slider; 463, bracket; 464, rotating shaft; 465, ground - contacting roller; 466, push block 1; 47, counterweight; 48, connecting part; 481, rotating plate; 482, sleeve plate; 483, buffer spring; 5, laser detection mechanism; 51, mounting plate 1; 52, mounting plate 2; 53, laser emitter; 54, laser receiver; 55, connecting plate; 56, light - transmitting mechanism; 561, sliding column 2; 562, push block 2; 563, telescopic hose; 564, light - blocking cone; 565, light - transmitting hole; 57, round hole 2; 6, control panel. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] The first embodiment, as Figures 1 to 5As shown in the figure, the present invention provides a technical solution: a flatness detection device for road and bridge engineering construction, including:

[0040] A frame 1, and moving wheels 2 rotatably installed at the four corners of the frame 1 for movement. The moving wheels 2 enable the device to move flexibly, realizing the flatness detection of construction surfaces at different positions. A push handle 3 is fixedly installed on one side of the top of the frame 1. The push handle 3 is held by an operator, and the movement direction and position of the device are controlled by pushing the push handle 3, facilitating the detection operation. A control panel 6 is fixedly installed on the top of the frame 1;

[0041] A ground-contact mechanism 4 is installed at the bottom of the frame 1. The ground-contact mechanism 4 is directly in contact with the road and bridge construction surface, reflecting the flatness of the construction surface;

[0042] A laser detection mechanism 5 is installed at the bottom of the frame 1. The laser detection mechanism 5 is arranged directly above the ground-contact mechanism 4. The laser detection mechanism 5 calculates the flatness of the construction surface based on the laser reception situation.

[0043] Second embodiment, on the basis of the first embodiment, please refer to Figures 4 to 10 As shown in the figure, the ground-contact mechanism 4 includes a mounting block 41. A strip-shaped groove 42 is opened at the bottom of the mounting block 41. A round hole 43 is opened at the top of the strip-shaped groove 42. Slide grooves 44 are opened on both sides of the inner wall of the round hole 43. A return spring 45 is fixedly installed inside the slide grooves 44. A ground-contact member 46 is slidably installed inside the round hole 43. The strip-shaped groove 42 provides a space for the up and down movement of the ground-contact member 46, enabling the ground-contact member 46 to closely fit construction surfaces with different flatness. Counterweight blocks 47 are fixedly installed at the four corners of the bottom of the mounting block 41. The counterweight blocks 47 increase the overall weight of the ground-contact mechanism 4, making the ground-contact roller 465 fit the construction surface more closely and improving the detection accuracy. Connecting members 48 are rotatably installed on both sides of the mounting block 41. The ground-contact mechanism 4 is connected to the frame 1 through the connecting members 48;

[0044] The number of strip-shaped grooves 42 is six, and the number of round holes 43 is forty-two. And the forty-two round holes 43 are arranged in a regular array. The round holes 43 are arranged in six rows and seven columns. A row of round holes 57 is evenly arranged at the top of the strip-shaped groove 42;

[0045] The ground-contact member 46 includes a first sliding column 461. Sliders 462 are fixedly installed on both sides of the first sliding column 461. A bracket 463 is fixedly installed at the bottom of the first sliding column 461. A rotating shaft 464 is rotatably installed inside the bracket 463. A ground-contact roller 465 is fixedly installed on the surface of the rotating shaft 464. The ground-contact roller 465 is directly in contact with the road and bridge construction surface, and its rolling process can reflect the flatness of the construction surface. A first push block 466 is fixedly installed at the top of the first sliding column 461;

[0046] The slider 462 is slidably installed inside the chute 44. The top of the slider 462 is fixedly connected to the bottom of the return spring 45. Both the first push block 466 and the second push block 562 are hemispherical structures, and the first push block 466 and the second push block 562 are in extrusion fit. When the device moves to the construction surface, the ground contact roller 465 contacts the construction surface. If the construction surface is uneven, the ground contact roller 465 will move up and down with the undulation of the construction surface. The sliders 462 on both sides of the first slide post 461 slide in the chute 44 to limit the moving direction of the first slide post 461. At the same time, the slider 462 will stretch or compress the return spring 45. When the ground contact roller 465 passes over a protrusion, it moves upward, and the return spring 45 is compressed to store elastic potential energy; when passing through a depression, the return spring 45 releases the elastic potential energy to push the slider 462 and the first slide post 461 downward, so that the ground contact roller 465 always fits the construction surface;

[0047] The connecting member 48 includes a rotating plate 481. The rotating plate 481 is rotatably installed on both sides of the mounting block 41 through a rotating shaft. A sleeve plate 482 is sleeved at one end of the rotating plate 481 away from the mounting block 41. The other end of the sleeve plate 482 is rotatably installed at the bottom of the frame 1 through a rotating shaft. A buffer spring 483 is fixedly connected between the rotating plate 481 and the sleeve plate 482. The buffer spring 483 is arranged inside the sleeve plate 482. When the device moves on an uneven road surface, the buffer spring 483 absorbs and buffers the impact force generated by the road surface bumps, reduces the influence on the laser detection mechanism 5, and ensures the detection accuracy.

[0048] In the third embodiment, on the basis of the first and second embodiments, please refer to Figures 11 to 13 As shown, the laser detection mechanism 5 includes a first mounting plate 51 and a second mounting plate 52. The first mounting plate 51 and the second mounting plate 52 are respectively fixedly installed on both sides of the bottom of the frame 1. A laser emitter 53 is fixedly installed on the surface of the first mounting plate 51, and a laser receiver 54 is fixedly installed on the surface of the second mounting plate 52. A connecting plate 55 is fixedly connected between the first mounting plate 51 and the second mounting plate 52. A circular hole two 57 is opened on the surface of the connecting plate 55, and a light transmission mechanism 56 is installed inside the circular hole two 57. The light transmission mechanism 56 can transmit or block the laser light emitted by the laser emitter 53 according to the flatness of the construction surface;

[0049] The laser emitters 53 are evenly distributed along the first mounting plate 51, and the laser receivers 54 are evenly distributed along the second mounting plate 52. The number of both the laser emitters 53 and the laser receivers 54 is seven, and the seven laser emitters 53 and laser receivers 54 are arranged oppositely. The laser emitter 53 emits laser light, and the laser receiver 54 receives the laser light emitted by the laser emitter 53, so as to detect the flatness of the construction surface of the road and bridge;

[0050] The number of the second round holes 57 is forty-two, and the forty-two second round holes 57 are arranged in a regular array. The second round holes 57 are set to be six rows and seven columns, and the second round holes 57 in one column are arranged parallel to the central connection line of the laser emitter 53 and the laser receiver 54. The second round holes 57 provide an installation position for the light transmission mechanism 56;

[0051] The light transmission mechanism 56 includes a second sliding column 561 and a telescopic hose 563. The second sliding column 561 is slidably installed inside the second round hole 57. A second pushing block 562 is fixedly installed at the bottom of the second sliding column 561. The telescopic hose 563 is fixedly installed at the top of the connecting plate 55. The top of the second sliding column 561 is fixedly connected to the top inside the cavity of the telescopic hose 563. A light blocking cone 564 is fixedly installed at the top of the telescopic hose 563. A light transmission hole 565 is formed on the surface of the light blocking cone 564. The telescopic hose 563 is used to connect the second sliding column 561 and the light blocking cone 564. When the second sliding column 561 moves up and down, the telescopic hose 563 expands and contracts accordingly, changing the height of the light blocking cone 564, and further changing the relative position between the light transmission hole 565 and the laser beam;

[0052] The light transmission hole 565 is arranged in the horizontal direction, and the aperture size of the light transmission hole 565 matches the diameter of the laser beam emitted by the laser emitter 53. When the position of the light transmission hole 565 changes due to the unevenness of the construction surface, the propagation path of the laser beam changes and is received by the laser receiver 54 for calculating the flatness.

[0053] During use, the operator moves the device to the starting position that needs to be detected during the road and bridge construction, and pushes the device through the push handle 3, and the moving wheels 2 roll on the ground;

[0054] The mounting block 41 of the ground attachment mechanism 4 is connected to the frame 1 through a connecting piece 48. The counterweight blocks 47 at the four corners of the bottom of the mounting block 41 press the whole ground attachment mechanism 4 downward to ensure that the ground attachment rollers 465 can closely fit the construction surface;

[0055] When the device moves onto the construction surface, the ground attachment rollers 465 contact the construction surface. If the construction surface is uneven, the ground attachment rollers 465 will move up and down with the undulation of the construction surface. The sliders 462 on both sides of the first sliding column 461 slide in the sliding grooves 44, restricting the moving direction of the first sliding column 461. At the same time, the sliders 462 will stretch or compress the return spring 45. When the ground attachment rollers 465 pass over the protrusions, they move upward, and the return spring 45 is compressed, storing elastic potential energy; when passing over the depressions, the return spring 45 releases the elastic potential energy, pushing the sliders 462 and the first sliding column 461 downward, so that the ground attachment rollers 465 always fit the construction surface;

[0056] Due to the up and down movement of the ground - contacting roller 465, the push block one 466 at the top of the sliding column one 461 will also move up and down accordingly. The push block one 466 is in mutual extrusion and adaptation with the push block two 562. When the push block one 466 moves up and down, it will push the push block two 562. The push block two 562 is fixed at the bottom of the sliding column two 561, so that the sliding column two 561 slides up and down in the circular hole two 57.

[0057] The top of the sliding column two 561 is connected to the telescopic hose 563. The up and down movement of the sliding column two 561 will drive the corresponding expansion and contraction of the telescopic hose 563, and the light - blocking cone block 564 at the top of the telescopic hose 563 will also change its height accordingly.

[0058] The laser emitters 53 are evenly distributed along the mounting plate one 51, a total of seven, emitting horizontal laser beams, and these laser beams pass through the light - transmitting mechanism 56.

[0059] The light - transmitting holes 565 on the surface of the light - blocking cone block 564 are horizontally arranged, and the aperture is matched with the diameter of the laser beam. When the height of the light - blocking cone block 564 changes due to the movement of the ground - contacting roller 465 caused by the uneven construction surface, the relative position between the light - transmitting hole 565 and the laser beam changes. If the construction surface is flat, the laser beam can smoothly pass through the light - transmitting hole 565 and directly irradiate the corresponding laser receiver 54 on the opposite mounting plate two 52. If the construction surface is uneven, the position of the light - transmitting hole 565 changes, and the laser beam cannot pass through the light - transmitting hole 565 and irradiate the laser receiver 54. The specific flatness of the construction surface is judged according to the time required for the laser receiver 54 to receive the laser again.

[0060] The laser receiver 54 receives the laser beam and transmits it to the control panel 6 through an electrical signal. The operator can intuitively view the flatness of different positions of the road and bridge construction surface from the control panel 6.

[0061] The operator continuously pushes the push handle 3, and the moving wheel 2 drives the device to move on the construction surface. The ground - contacting mechanism 4 and the laser detection mechanism 5 continuously repeat the above working process to continuously detect the flatness of the construction surface.

[0062] During the movement of the device, the buffer spring 483 between the rotating plate 481 and the sleeve plate 482 of the connecting piece 48 plays a buffering role. When the device jolts when passing through an uneven road surface, the buffer spring 483 absorbs and buffers the impact force, reduces the influence on the laser detection mechanism 5, and ensures the detection accuracy.

[0063] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A flatness detection device for road and bridge engineering construction, characterized in that Including: A frame (1), and moving wheels (2) rotatably installed at the four corners of the frame (1) for movement. One side of the top of the frame (1) is fixedly installed with a push handle (3), and a control panel (6) is fixedly installed on the top of the frame (1); A ground - adhering mechanism (4), which is installed at the bottom of the frame (1); A laser detection mechanism (5), which is installed at the bottom of the frame (1), and the laser detection mechanism (5) is arranged directly above the ground - adhering mechanism (4); Among them, the laser detection mechanism (5) includes a first mounting plate (51) and a second mounting plate (52). The first mounting plate (51) and the second mounting plate (52) are respectively fixedly installed on both sides of the bottom of the frame (1). A laser emitter (53) is fixedly installed on the surface of the first mounting plate (51), and a laser receiver (54) is fixedly installed on the surface of the second mounting plate (52). A connecting plate (55) is fixedly connected between the first mounting plate (51) and the second mounting plate (52). A second round hole (57) is formed on the surface of the connecting plate (55), and a light - transmitting mechanism (56) is installed inside the second round hole (57).

2. The flatness detection device for road and bridge engineering construction according to claim 1, wherein: The laser emitters (53) are evenly distributed along the first mounting plate (51), the laser receivers (54) are evenly distributed along the second mounting plate (52). The number of both the laser emitters (53) and the laser receivers (54) is seven, and the seven laser emitters (53) and laser receivers (54) are arranged oppositely.

3. The flatness detection device for road and bridge engineering construction according to claim 2, wherein: The number of the second round holes (57) is forty - two, and the forty - two second round holes (57) are arranged in a regular array. The second round holes (57) are arranged in six rows and seven columns, and one column of the second round holes (57) is arranged parallel to the central connection line of the laser emitter (53) and the laser receiver (54).

4. A flatness detection device for road and bridge engineering construction according to claim 1, characterized in that: The light - transmitting mechanism (56) includes a second sliding column (561) and a telescopic hose (563). The second sliding column (561) is slidably installed inside the second round hole (57). A second push block (562) is fixedly installed at the bottom of the second sliding column (561). The telescopic hose (563) is fixedly installed on the top of the connecting plate (55). The top of the second sliding column (561) is fixedly connected to the top inside the cavity of the telescopic hose (563). A light - blocking cone (564) is fixedly installed on the top of the telescopic hose (563), and a light - transmitting hole (565) is formed on the surface of the light - blocking cone (564).

5. A flatness detection device for road and bridge engineering construction according to claim 4, characterized in that: The light - transmitting hole (565) is arranged in a horizontal direction, and the aperture size of the light - transmitting hole (565) matches the diameter of the laser beam emitted by the laser emitter (53).

6. The flatness detection device for road and bridge engineering construction according to claim 1, characterized in that: The ground attachment mechanism (4) includes a mounting block (41). A strip-shaped groove (42) is formed at the bottom of the mounting block (41). A first round hole (43) is formed at the top of the strip-shaped groove (42). Slide grooves (44) are formed on both sides of the inner wall of the first round hole (43). A return spring (45) is fixedly installed inside the slide groove (44). A ground attachment member (46) is slidably installed inside the first round hole (43). Counterweight blocks (47) are fixedly installed at the four corners of the bottom of the mounting block (41). Connecting members (48) are rotatably installed on both sides of the mounting block (41).

7. The flatness detection device for road and bridge engineering construction according to claim 6, wherein: The number of the strip-shaped grooves (42) is six. The number of the first round holes (43) is forty-two. And the forty-two first round holes (43) are arranged in a regular array. The first round holes (43) are arranged in six rows and seven columns. A column of second round holes (57) are evenly arranged at the top of the strip-shaped groove (42).

8. The flatness detection device for road and bridge engineering construction according to claim 7, wherein: The ground attachment member (46) includes a first slide column (461). Sliders (462) are fixedly installed on both sides of the first slide column (461). A bracket (463) is fixedly installed at the bottom of the first slide column (461). A rotating shaft (464) is rotatably installed inside the bracket (463). A ground attachment roller (465) is fixedly installed on the surface of the rotating shaft (464). A first push block (466) is fixedly installed at the top of the first slide column (461).

9. The flatness detection device for road and bridge engineering construction according to claim 8, characterized in that: The slider (462) is slidably installed inside the slide groove (44). The top of the slider (462) is fixedly connected to the bottom of the return spring (45). Both the first push block (466) and the second push block (562) are hemispherical structures, and the first push block (466) and the second push block (562) are in extrusion fit with each other.

10. A flatness detection device for road and bridge engineering construction according to claim 6, characterized in that: The connecting member (48) includes a rotating plate (481). The rotating plate (481) is rotatably installed on both sides of the mounting block (41) through a rotating shaft. A sleeve plate (482) is sleeved at one end of the rotating plate (481) away from the mounting block (41). The other end of the sleeve plate (482) is rotatably installed at the bottom of the frame (1) through a rotating shaft. A buffer spring (483) is fixedly connected between the rotating plate (481) and the sleeve plate (482). The buffer spring (483) is arranged inside the sleeve plate (482).

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