A flatness monitoring device and method for base construction

Abstract

The application discloses a flatness monitoring device and method for base construction, and belongs to the technical field of flatness monitoring. The flatness monitoring device for base construction comprises a self-walking module, the self-walking module is used for driving the whole flatness monitoring device to autonomously advance on a base construction surface, and realizes continuous and automatic flatness detection operation; a monitoring rotating arm is installed below the self-walking module and is used for real-time detection of the flatness state of the base surface; and a powder box is installed on one side of the self-walking module and above the monitoring rotating arm and is used for storing powder for marking. The self-walking module drives the device to continuously and autonomously advance on the base construction surface, the monitoring rotating arm realizes real-time sensing of ground fluctuation, the powder box marks the defect position in real time, and a ramming module synchronously compacts the powder, so that integrated flow operation of detection, marking and compaction is realized, and compared with the traditional manual point-by-point detection mode, the efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of flatness monitoring technology, specifically relating to a flatness monitoring device and method for base construction. Background Technology

[0002] Base course construction is a crucial step in road engineering, site hardening, and building foundation construction. Its surface smoothness directly affects the quality of subsequent surface layer construction, the stress uniformity of structural layers, and the overall service life of the project. In current construction quality acceptance standards, base course smoothness is one of the core indicators that must be tested and evaluated.

[0003] Currently, the most widely used method is the 3m straightedge method. This involves inspectors placing a 3m aluminum alloy straightedge tightly against the substrate surface and measuring the maximum gap between the straightedge and the surface using a feeler gauge. This gap value is used as the basis for flatness assessment. This method is simple, inexpensive, and provides intuitive results, but it has significant drawbacks: it relies on intermittent sampling and cannot achieve continuous testing; it has low efficiency and high labor intensity; and the results are greatly affected by human factors such as the inspector's operating technique and the subjectivity of readings, making it difficult to guarantee consistency and reliability. Some projects use continuous flatness meters for testing, which automatically record and output continuous flatness data through sensors. This method has relatively higher testing efficiency and better data continuity, but the raw data output by continuous flatness meters is mostly electrical signals or digital waveforms, requiring personnel with professional knowledge to interpret and convert them. Subsidiary construction workers cannot directly determine the location and severity of defects based on the data. Furthermore, it hinders immediate decision-making during construction, often requiring work stoppages to await the test report before further action is taken. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a flatness monitoring device and method for base construction.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a flatness monitoring device for base construction, comprising:

[0006] The self-propelled module is used to drive the entire flatness monitoring device to move forward autonomously on the base construction surface, so as to realize continuous and automated flatness detection operation.

[0007] The monitoring arm, installed below the self-propelled module, is used to detect the flatness of the base surface in real time and trigger a marking action when unevenness is detected.

[0008] The powder bin, installed on one side of the self-propelled module and above the monitoring arm, is used to store marking powder and release powder for marking when uneven bumps appear on the base surface.

[0009] An adjustment component, installed on one side of the powder hopper, is used to work with the powder markings on the powder hopper to ensure that the powder sprinkled on the base surface can adhere firmly to uneven areas and prevent the powder from being blown away by the wind.

[0010] The monitoring arm is rotatably connected to both sides of the self-propelled module via a torsion spring, and the torsion spring is sleeved on the rotating shaft between the monitoring arm and the self-propelled module. The preload of the torsion spring inside the monitoring arm makes the monitoring roller at the end of the monitoring arm always tend to rotate toward the surface of the base layer, so as to keep the monitoring roller and the surface of the base layer at a constant contact pressure.

[0011] A push rod is fixedly installed between the monitoring arms, and a connecting rod is fixedly installed on one side of the push rod.

[0012] Furthermore, the self-propelled module is symmetrically provided with mounting brackets on both sides. The two mounting brackets are symmetrically arranged on the left and right sides of the self-propelled module to provide symmetrical support and installation base for the monitoring arm, powder box and adjustment components. The two mounting brackets are horizontally arranged to provide a precise horizontal reference plane for the monitoring arm.

[0013] Furthermore, a material discharge platform is fixedly installed at the lower end of the powder box, a second torsion spring plate is rotatably installed on one side of the upper end of the material discharge platform, a first torsion spring plate is fixedly installed at the lower end of the powder box away from the material discharge platform, and multiple powder discharge slots are evenly opened on the second torsion spring plate. The push rod lightly touches the lower surface of the first torsion spring plate when the base layer is flat.

[0014] Furthermore, the upper end of the unloading platform is inclined, and the unloading platform, the first torsion spring plate, and the second torsion spring plate form a cavity in their original state.

[0015] Furthermore, the second torsion spring plate has an arc-shaped cross-section.

[0016] Furthermore, the adjustment assembly includes a fixed box symmetrically fixedly installed on both sides of the powder box. A first adjustment block is slidably connected inside the fixed box. A limit block is fixedly installed on one side of the first adjustment block. A sliding groove is opened on one side of the fixed box. The limit block is slidably connected to the sliding groove. The other end of the limit block is set in a groove at the end of the connecting rod away from the monitoring arm.

[0017] Furthermore, a movable block is slidably connected inside the fixed box, a second adjusting block is provided on one side of the movable block, the second adjusting block is slidably connected to the fixed box, a second return spring is installed on one side of the movable block, a first return spring is fixedly installed at the lower end of the second adjusting block, and a compaction module is installed on one side of the second adjusting block.

[0018] Furthermore, the movable block is symmetrically arranged with wedge-shaped surfaces on both sides, and the first adjusting block and the second adjusting block are both arranged with wedge-shaped surfaces on the side closest to the movable block.

[0019] Furthermore, the compaction module includes an adjustment frame fixedly connected to one side of the second adjustment block, a mounting frame slidably connected inside the adjustment frame, a compaction roller rotatably connected inside the mounting frame, a plurality of compaction blocks circumferentially mounted on the compaction roller, the compaction blocks being trapezoidal in shape with a narrower top and a wider bottom, and a spring installed between the mounting frame and the adjustment frame.

[0020] The method for monitoring the flatness of the base layer during construction includes the following steps:

[0021] Step 1: Level the mounting brackets, ensuring both horizontally positioned brackets are level to provide a precise horizontal reference surface for the monitoring arm. Activate the self-propelled module to drive the monitoring arm forward autonomously across the base construction surface. The monitoring rollers at the end of the monitoring arm maintain constant contact pressure with the base surface, initiating continuous and automated flatness detection operations.

[0022] Step 2: When the monitoring arm encounters an uneven surface on the base layer, it rotates. The rotation of the monitoring arm simultaneously drives the push rod and connecting rod to rotate. The push rod pushes the first torsion spring plate, and the first torsion spring plate pushes the second torsion spring plate, causing the powder that originally entered the cavity from the powder drop trough to fall to the ground and mark the uneven position with powder.

[0023] Step 3: The connecting rod rotates and drives the limiting block to move. The limiting block drives the first adjusting block to slide upward. The first adjusting block, through the wedge-shaped surface of the moving block, drives the second adjusting block to slide downward. This causes the adjusting frame to drive the compacting roller downward to compact the scattered powder, preventing the powder from being blown away by the wind and ensuring that the powder adheres firmly to the uneven position.

[0024] Step 4: Under normal conditions (flat base layer), the monitoring arm rotates back to the initial horizontal position under the action of the torsion spring. The first reset spring pushes the second adjusting block upward to return to its original position. Under the action of the spring, the mounting bracket drives the compaction roller upward to retract and reset. The push rod no longer pushes the first torsion spring plate into the powder box, the discharge port is closed, and the powder release stops.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) The present invention uses a self-propelled module to drive the device to move forward continuously and autonomously on the base construction surface. The monitoring arm senses the ground undulation in real time, the powder box marks the defect location in real time, and the compaction module compacts the powder in real time. This realizes the integrated flow operation of detection, marking and compaction. Compared with the traditional manual point-by-point detection method, the efficiency can be greatly improved.

[0027] (2) By designing the material drop platform and the first and second torsion spring plates to form a cavity to buffer the powder, the powder drop response time is greatly shortened, the marking position and defect position are highly accurate, and the two-stage torsion spring plate sealing structure avoids the common problems of excessive powder outflow, closure jamming and pulse feeding that are common with single torsion spring plates. The powder utilization rate is greatly improved, and uniform, continuous and controllable powder release is achieved. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the monitoring arm of the present invention;

[0030] Figure 3 This is a cross-sectional view of the powder box of the present invention;

[0031] Figure 4 This is the present invention. Figure 2 A magnified view of a section at point A in the middle;

[0032] Figure 5 This is the present invention. Figure 3 A magnified view of a section at point B in the middle;

[0033] Figure 6 This is a cross-sectional internal structural diagram of the powder box of the present invention;

[0034] Figure 7 This is a diagram of the internal structure of the regulating component of the present invention.

[0035] Reference numerals: 1. Mounting bracket; 2. Self-propelled module; 3. Monitoring arm; 31. Push rod; 32. Connecting rod; 4. Powder box; 41. Discharge platform; 42. First torsion spring plate; 43. Second torsion spring plate; 44. Powder discharge chute; 5. Adjustment component; 50. First return spring; 51. Fixed box; 52. Slide groove; 53. Limiting block; 54. First adjusting block; 55. Moving block; 56. Second adjusting block; 57. Second return spring; 58. Compacting module; 581. Adjusting frame; 582. Mounting frame; 583. Compacting roller; 584. Compacting block. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] like Figures 1-7 As shown in this embodiment, a flatness monitoring device for base construction includes:

[0038] Self-propelled module 2 is used to drive the entire flatness monitoring device to move forward autonomously on the base construction surface, so as to realize continuous and automated flatness detection operation.

[0039] The monitoring arm 3 is installed below the self-propelled module 2 to detect the flatness of the base surface in real time and trigger a marking action when unevenness is detected.

[0040] The powder box 4 is installed on one side of the self-propelled module 2 and above the monitoring arm 3. It is used to store marking powder and release powder for marking when uneven bumps appear on the base surface.

[0041] Adjustment component 5, which is installed on one side of powder box 4, is used to cooperate with the powder marking of powder box 4 so that the powder sprinkled on the base surface can firmly adhere to the uneven position and prevent the powder from being blown away by the wind.

[0042] The monitoring arm 3 is rotatably connected to both sides of the self-propelled module 2 via a torsion spring. The torsion spring is sleeved on the rotating shaft between the monitoring arm 3 and the self-propelled module 2. The pre-tightening force of the torsion spring inside the monitoring arm 3 makes the monitoring roller at the end of the monitoring arm 3 always tend to rotate towards the surface of the base layer, so as to keep the monitoring roller and the surface of the base layer at a constant contact pressure.

[0043] A push rod 31 is fixedly installed between the monitoring arms 3, and a connecting rod 32 is fixedly installed on one side of the push rod 31.

[0044] Through the above technical solution, this application constructs an integrated automatic monitoring system for the flatness of base construction by setting up a self-propelled module 2, a monitoring rotating arm 3, a powder box 4, and an adjustment component 5 in synergy. The self-propelled module 2 acts as a mobile platform, driving the entire device to move continuously and autonomously across the base construction surface, achieving continuous and automated flatness detection operations. This avoids the inefficiencies and high labor intensity of traditional manual point-by-point measurement methods. The monitoring rotating arm 3 is rotatably connected to both sides of the self-propelled module 2 via torsion springs. The pre-tension of the torsion springs ensures that the monitoring roller at the end of the monitoring rotating arm 3 maintains constant contact pressure with the base surface, enabling real-time sensing. The device detects minute undulations on the base surface and transmits the sensed mechanical displacement synchronously to the powder box 4 and the adjusting component 5 via the push rod 31 and connecting rod 32. This achieves an instantaneous linkage response of "sensing, marking, and compaction." When the powder box 4 detects unevenness, it releases powder to mark the unevenness. The adjusting component 5 then compacts the powder downwards, ensuring that the powder adheres firmly to the uneven position and preventing the marking from failing due to the powder being blown away by the wind. The entire device relies entirely on pure mechanical linkage and requires no sensors, controllers, or external power sources. It has extremely high reliability and environmental adaptability in the base construction environment and effectively solves the technical problems of low efficiency in existing flatness detection and easy disappearance of markings.

[0045] Preferably, the self-propelled module 2 can adopt a wheeled walking mechanism. When a wheeled walking mechanism is adopted, the self-propelled module 2 includes a walking drive motor and four walking wheels. The four walking wheels are arranged in a rectangular shape. The walking drive motor drives the walking wheels to rotate through a reduction transmission mechanism, thereby driving the entire device forward. The walking speed of the self-propelled module 2 is adjustable. The walking speed in the detection mode is 1-5 m / min to ensure that the monitoring arm 3 can fully perceive the undulations of the base surface and accurately mark the powder box 4. The walking speed in the transfer mode is 5-15 m / min to improve the movement efficiency of the device.

[0046] The self-propelled module 2 is symmetrically provided with mounting brackets 1 on both sides. The two mounting brackets 1 are symmetrically arranged on the left and right sides of the self-propelled module 2, providing symmetrical support and mounting base for the monitoring arm 3, powder box 4 and adjustment component 5. The two mounting brackets 1 are horizontally arranged, providing a precise horizontal reference plane for the monitoring arm 3.

[0047] Through the above technical solution, this application constructs a modular installation platform with a precise horizontal reference by symmetrically setting mounting brackets 1 on both sides of the self-propelled module 2. The two mounting brackets 1 are symmetrically distributed on the left and right sides of the self-propelled module 2, providing a stable and symmetrical support base for the monitoring arm 3, powder box 4, and adjustment component 5. This ensures that the center of gravity of the entire device is located on the center line of the self-propelled module 2, making it less prone to tilting during movement, thus guaranteeing the stability of the detection process and the reliability of the detection data. At the same time, the two mounting brackets 1 are horizontally set, and their upper end faces are coplanar to form a horizontal reference plane, providing a precise zero-position reference for the monitoring arm 3. The rotation axis of the monitoring arm 3 is horizontally installed on this reference plane. When the base surface is flat, the monitoring arm 3 is in the initial horizontal position, which is the zero-position reference of the monitoring arm 3. When there are undulations on the base surface, the monitoring arm 3 deflects relative to the horizontal reference plane. The deflection angle is linearly related to the height of the ground undulation, thereby realizing the precise quantitative detection of the flatness of the base surface and ensuring the accuracy and repeatability of the detection data.

[0048] Preferably, the mounting bracket 1 is made of hollow square steel or channel steel welded together, with a wall thickness of 2-4mm, which ensures sufficient structural strength and reduces the overall weight of the device. The mounting bracket 1 forms a portal frame structure. The lower end of the mounting bracket 1 is provided with leveling bolts. There are four leveling bolts, which are respectively set at both ends of the two mounting brackets 1. After the device is placed on the base surface, the height of the mounting bracket 1 can be finely adjusted by rotating the leveling bolts, so that the upper surface of the two mounting brackets 1 is in a precise level state, providing a precise horizontal reference plane for the monitoring arm 3.

[0049] A material drop platform 41 is fixedly installed at the lower end of the powder box 4. A second torsion spring plate 43 is rotatably installed on one side of the upper end of the material drop platform 41. A first torsion spring plate 42 is fixedly installed on the lower end of the powder box 4 away from the material drop platform 41. Multiple powder drop grooves 44 are evenly opened on the second torsion spring plate 43. The push rod 31 lightly touches the lower surface of the first torsion spring plate 42 when the base layer is flat.

[0050] Through the above technical solution, this application sets up a linkage structure of a discharge platform 41, a first torsion spring plate 42, and a second torsion spring plate 43 at the lower end of the powder box 4, thus constructing a mechanical powder release system. Specifically, when the base layer is flat, the push rod 31 lightly touches the lower surface of the first torsion spring plate 42. At this time, the discharge platform 41, the first torsion spring plate 42, and the second torsion spring plate 43 together form a sealed cavity. The marked powder in the powder box 4 enters the cavity through the powder discharge chute 44 for temporary storage, but is blocked by the closed discharge channel and cannot fall to the ground. When the monitoring arm 3 detects an uneven protrusion on the base layer surface, the monitoring arm 3 rotates, driving the push rod 31 to push the first torsion spring plate 42 upward. Plate 42, the first torsion spring plate 42 transmits the thrust to the second torsion spring plate 43, the second torsion spring plate 43 rotates around its rotation axis, the originally closed cavity is opened, the powder temporarily stored in the cavity is evenly scattered onto the uneven position of the ground by multiple powder dropping grooves 44 on the second torsion spring plate 43 under the action of gravity, and the powder is marked. When the monitoring arm 3 leaves the uneven area, the first torsion spring plate 42 and the second torsion spring plate 43 automatically return to the initial closed position under the action of the reset elastic force of their respective torsion springs, the cavity is re-closed, and the powder release stops. Without any sensors, solenoid valves or external power sources, it realizes the instantaneous, accurate and automated powder marking of uneven positions.

[0051] It should be further explained that the size and number of powder discharge troughs 44 determine the amount of powder released per unit time. By reasonably designing the total cross-sectional area of ​​the powder discharge troughs 44, the release rate of the powder is limited to a reasonable range. When the monitoring arm 3 detects unevenness, the powder in the cavity flows out through the powder discharge troughs 44 at a controlled rate, rather than gushing out in large quantities instantly. This flow control ensures that the amount of powder released can just cover the defect area, avoiding the waste phenomenon of a large amount of powder accumulating at the defect point and exceeding the actual needs in the traditional "all-on" extensive release method.

[0052] The upper end of the material drop platform 41 is inclined, and the material drop platform 41, the first torsion spring plate 42, and the second torsion spring plate 43 form a cavity in their original state.

[0053] With the above technical solution, when the powder box 4 is filled with marked powder, the powder falls into the upper end of the discharge platform 41 through the discharge port at the bottom of the powder box 4 under the action of gravity, slides down along the inclined surface of the discharge platform 41 and enters the cavity. Since the second torsion spring plate 43 is in the closed state, the lower end of the cavity is sealed, and the powder entering the cavity is blocked in the cavity and cannot continue to fall, forming a "buffer" state of the powder. As the powder continues to enter the cavity from the powder box 4, the powder in the cavity gradually accumulates until the cavity is filled or a dynamic equilibrium is reached.

[0054] It should be further explained that the upper end of the discharge platform 41 is inclined, and the preferred inclination angle is 15°-30°. The inclined discharge platform 41 utilizes the gravity component of the powder itself to allow the powder to slide more smoothly along the surface of the discharge platform 41 to the powder discharge trough 44 when the cavity is opened, avoiding the accumulation and blockage of powder in the cavity, and ensuring the continuity and uniformity of powder discharge. At the same time, the inclination angle should not be too large or too small.

[0055] The second torsion spring plate 43 has an arc-shaped cross-section.

[0056] Through the above technical solution, this application sets the cross-section of the second torsion spring plate 43 to be arc-shaped. By optimizing the geometry of the second torsion spring plate 43, the smoothness, uniformity and structural reliability of powder release are significantly improved. The arc-shaped cross-section design makes the gap between the outer surface of the second torsion spring plate 43 and the discharge table 41 gradually increase from small to large when the second torsion spring plate 43 is pushed and flipped by the first torsion spring plate 42. This gradual opening, compared with the sudden opening of the flat flip plate, allows the powder to be evenly distributed and released in an orderly manner along the arc surface, avoiding the problems of concentrated powder outflow and sudden flow change that are common in flat flip plates. At the same time, the arc-shaped cross-section greatly enhances the bending section modulus of the second torsion spring plate 43. Under the same material thickness, the bending stiffness of the arc structure is far greater than that of the flat structure, making the second torsion spring plate 43 less prone to bending deformation or plastic deformation during long-term repeated opening and closing. This ensures the long-term stability of the sealed fit between the powder discharge trough 44 and the discharge table 41 and the precise controllability of the powder discharge amount.

[0057] Specifically, the radius of the arc of the second torsion spring plate 43 is preferably 50-150mm. If the radius of the arc is too small, the curvature of the plate surface will be too large, and the resistance will increase when the powder flows on the arc surface, which may cause the powder to accumulate at the trough. If the radius of the arc is too large, it will be close to a planar structure, which will not be able to give full play to the advantages of the arc shape in terms of bending stiffness and powder diversion. The radius of the arc of 50-150mm can ensure that the powder flows smoothly along the arc surface and provide sufficient bending stiffness.

[0058] It should be further explained that when the push rod 31 pushes the first torsion spring plate 42 and the first torsion spring plate 42 pushes the second torsion spring plate 43 to flip, a gradually increasing gap is formed between the arc-shaped second torsion spring plate 43 and the discharge table 41. The powder is evenly distributed and released in an orderly manner along the arc surface, avoiding the "pulse-like" powder drop phenomenon with concentrated powder outflow and sudden flow change that is common in schemes with only a single torsion spring plate. Multiple powder drop grooves 44 are arranged along the arc direction, so that the powder is dispersed in a uniform width range when it is sprinkled, forming a marking band with a consistent width, which improves the recognizability of the marking and the utilization rate of the powder.

[0059] Furthermore, a second torsion spring plate 43 is provided on the basis of the first torsion spring plate 42. The cavity formed between the first torsion spring plate 42 and the second torsion spring plate 43 acts as a buffer chamber. In the initial state, only a small amount of powder pre-stored in the cavity is waiting to be released. A large amount of powder in the powder box 4 is blocked outside the cavity by the first torsion spring plate 42 and the second torsion spring plate 43. When the monitoring arm 3 detects unevenness, the second torsion spring plate 43 opens to release the pre-stored powder in the cavity and the small amount of powder that falls from the powder drop trough 44, rather than all the powder that suddenly opens in the powder box 4. Moreover, the graded setting of the first torsion spring plate 42 and the second torsion spring plate 43 makes the closing action divided into two steps, avoiding the contradiction of a single torsion spring plate facing the powder pressure and sealing requirements at the same time. After the push rod 31 withdraws the thrust, the second torsion spring plate 43 resets and closes first under the action of its own torsion spring force. At this time, the powder in the cavity has been basically emptied. When the first torsion spring plate 42 closes, it only faces a small amount of residual powder, greatly reducing the risk of jamming.

[0060] The adjustment assembly 5 includes a fixed box 51 symmetrically fixedly installed on both sides of the powder box 4. A first adjustment block 54 is slidably connected inside the fixed box 51. A limit block 53 is fixedly installed on one side of the first adjustment block 54. A sliding groove 52 is opened on one side of the fixed box 51. The limit block 53 is slidably connected to the sliding groove 52. The other end of the limit block 53 is set in the groove at the end of the connecting rod 32 away from the monitoring rotating arm 3.

[0061] Through the above technical solution, this application symmetrically fixes fixed boxes 51 on both sides of the powder box 4, and slides a first adjusting block 54, a limiting block 53 and a sliding groove 52 inside the fixed box 51. One end of the limiting block 53 is fixedly installed on the first adjusting block 54, and the other end is embedded in the groove of the connecting rod 32 away from the end of the monitoring arm 3, forming a mechanical coupling connection between the monitoring arm 3 and the adjusting component 5. When the monitoring arm 3 rotates due to the undulation of the base surface, the connecting rod 32 rotates accordingly, and the groove at its end drives the limiting block 53 to slide along the sliding groove 52, thereby driving the first adjusting block 54 to slide up and down along the inner wall of the fixed box 51.

[0062] Specifically, one end of the connecting rod 32 is fixedly connected to the push rod 31 of the monitoring arm 3, and the other end extends to the position of the adjustment component 5. The end of the connecting rod 32 away from the monitoring arm 3 has a groove. One end of the limiting block 53 is fixedly installed on the first adjustment block 54, and the other end is embedded in the groove at the end of the connecting rod 32. The limiting block 53 and the groove form a sliding fit. When the connecting rod 32 rotates, the inner wall of the groove applies a pushing and pulling force to the limiting block 53, driving the limiting block 53 to slide up and down along the slide groove 52. When the monitoring arm 3 deflects upward due to the protrusion of the base surface, the connecting rod 32 rotates upward around the rotation axis of the monitoring arm 3. The inner wall of the groove at the end of the connecting rod 32 pushes the limiting block 53 upward. The limiting block 53 slides upward along the slide groove 52, driving the first adjustment block 54 to slide upward. Then, through the wedge-shaped surface of the moving block 55, the second adjustment block 56 is driven to slide downward, triggering the compaction action of the compaction module 58.

[0063] A movable block 55 is slidably connected inside the fixed box 51. A second adjusting block 56 is provided on one side of the movable block 55. The second adjusting block 56 is slidably connected to the fixed box 51. A second return spring 57 is installed on one side of the movable block 55. A first return spring 50 is fixedly installed at the lower end of the second adjusting block 56. A compaction module 58 is installed on one side of the second adjusting block 56.

[0064] Through the above technical solution, the two sides of the movable block 55 in this application respectively cooperate with the wedge-shaped surfaces of the first adjusting block 54 and the second adjusting block 56 to form a bidirectional wedge transmission mechanism. When the first adjusting block 54 slides upward, its wedge-shaped surface pushes the movable block 55 to slide laterally along the fixed box 51. The wedge-shaped surface on the other side of the movable block 55 then pushes the second adjusting block 56 to slide downward, converting the ground undulation sensed by the monitoring arm 3 into the vertical pressing action of the compaction module 58. The second reset spring 57 provides the lateral reset elastic force for the movable block 55, and the first reset spring 50 provides the longitudinal reset elastic force for the second adjusting block 56. The two cooperate to realize the automatic reset of the adjusting component 5 after the action is completed, ensuring the continuous cyclic working capability of the device.

[0065] Specifically, when the monitoring arm 3 detects an uneven protrusion on the base surface, the monitoring arm 3 deflects upward, driving the first adjusting block 54 to slide upward along the fixed box 51 via the connecting rod 32 and the limiting block 53. The side of the first adjusting block 54 closest to the moving block 55 is a wedge-shaped surface. As the first adjusting block 54 rises, its wedge-shaped surface contacts the corresponding wedge-shaped surface of the moving block 55 and generates relative sliding, pushing the moving block 55 to slide laterally along the fixed box 51 away from the first adjusting block 54 (i.e., towards the second adjusting block 56). The side of the moving block 55 closest to the second adjusting block 56 is also a wedge-shaped surface. As the moving block 55 slides towards the second adjusting block 56, the wedge-shaped surface of the moving block 55 contacts the corresponding wedge-shaped surface of the second adjusting block 56 and generates relative sliding, pushing the second adjusting block 56... As the first adjusting block 54 slides downward along the fixed box 51, its vertical upward movement is converted into the vertical downward movement of the second adjusting block 56 after the lateral movement of the moving block 55, thus achieving a secondary conversion of the direction of movement. When the monitoring arm 3 leaves the protruding area and the thrust of the connecting rod 32 disappears, the elastic force of the first return spring 50 pushes the second adjusting block 56 to slide upward and reset. The wedge-shaped surface of the second adjusting block 56 pushes the moving block 55 to slide in the opposite direction (i.e., towards the first adjusting block 54) and reset. The wedge-shaped surface of the moving block 55 pushes the first adjusting block 54 to slide downward and reset. The three return springs (the first return spring 50, the second return spring 57, and the return spring between the moving block 55 and the fixed box 51) work together to restore the entire adjusting assembly 5 to its initial state.

[0066] The movable block 55 is symmetrically arranged with wedge-shaped surfaces on both sides, and the first adjusting block 54 and the second adjusting block 56 are both arranged with wedge-shaped surfaces on the side closest to the movable block 55.

[0067] It should be further explained that: since the wedge-shaped surfaces on both sides of the moving block 55 are symmetrical, the first adjusting block 54 and the second adjusting block 56 apply oblique pushing forces to the moving block 55 from the left and right sides respectively. The horizontal component forces of the two are in opposite directions (the first adjusting block 54 pushes the moving block 55 to the right, and the second adjusting block 56 pushes the moving block 55 to the left). In the reset state, they cancel each other out, keeping the moving block 55 in the center position. In the operating state, the pushing force on one side is the main force, and the reset spring force on the other side is the auxiliary force. The moving block 55 is subjected to balanced forces and will not generate a deflection torque.

[0068] The compaction module 58 includes an adjustment frame 581 fixedly connected to one side of the second adjustment block 56. A mounting frame 582 is slidably connected inside the adjustment frame 581. A compaction roller 583 is rotatably connected inside the mounting frame 582. Multiple compaction blocks 584 are mounted on the circumference of the compaction roller 583. The compaction blocks 584 are arranged in a trapezoidal shape that is narrower at the top and wider at the bottom. A spring is installed between the mounting frame 582 and the adjustment frame 581.

[0069] Through the above technical solution, when the second adjusting block 56 slides downward, the adjusting frame 581 drives the mounting frame 582 and the compacting roller 583 to move downward as a whole. The compacting block 584 on the compacting roller 583 rolls and compacts the powder scattered on the base surface. The spring between the mounting frame 582 and the adjusting frame 581 provides elastic buffering and adaptive adjustment functions, so that the compacting roller 583 can produce slight floating when it encounters hard objects or undulations on the base surface, avoiding damage to the equipment caused by rigid impact. The compacting block 584 is set in a trapezoidal shape that is narrow at the top and wide at the bottom. When the trapezoidal inclined surface comes into contact with the powder during the rolling of the compacting roller 583, it can squeeze the powder to the sides and downward, so that the powder is embedded in the tiny pores on the base surface. At the same time, when it is lifted, the inclined surface reduces the contact area and adhesion force with the powder, effectively preventing the powder from clumping and adhering to the surface of the compacting block 584, thus achieving efficient compaction and non-adhesive rolling of the powder.

[0070] Specifically, when the trapezoidal upper base contacts the powder, the combined action of the gravity of the compacting roller 583 and the downward pressure of the spring generates a downward squeezing force, pressing the powder into the tiny pores on the surface of the base layer. At the same time, as the compacting block 584 rolls over the powder, the inclined side wall of the trapezoid also exerts a lateral squeezing effect on the powder, pushing the powder to both sides, so that the powder is evenly spread on the surface of the base layer, increasing the contact area between the powder and the base layer, and improving the adhesion. When the second adjusting block 56 slides upward to reset, the adjusting frame 581 moves upward, and the spring pulls the mounting frame 582 upward, and the compacting roller 583 is lifted off the ground, avoiding wear and resistance caused by continuous contact with the ground in the non-working state. During the reset process, the spring releases the remaining compression energy, so that the mounting frame 582 and the adjusting frame 581 return to their initial relative positions.

[0071] The method for monitoring the flatness of the base layer during construction includes the following steps:

[0072] Step 1: Level the mounting bracket 1, ensuring that the two horizontally positioned mounting brackets 1 are in a horizontal state, providing a precise horizontal reference surface for the monitoring arm 3. Activate the self-propelled module 2, driving the monitoring arm 3 to move autonomously forward on the base construction surface. The monitoring roller at the end of the monitoring arm 3 maintains a constant contact pressure with the base surface, initiating continuous and automated flatness detection operations.

[0073] Step 2: When the monitoring arm 3 encounters an uneven surface on the base layer, it rotates. The rotation of the monitoring arm 3 simultaneously drives the push rod 31 and the connecting rod 32 to rotate. The push rod 31 pushes the first torsion spring plate 42, and the first torsion spring plate 42 pushes the second torsion spring plate 43, causing the powder that originally entered the cavity from the powder drop trough 44 to fall to the ground and mark the uneven position with powder.

[0074] Step 3: The connecting rod 32 rotates and drives the limiting block 53 to move. The limiting block 53 drives the first adjusting block 54 to slide upward. The first adjusting block 54 drives the second adjusting block 56 to slide downward through the wedge-shaped surface of the moving block 55. This causes the adjusting frame 581 to drive the compacting roller 583 to compact the scattered powder downward, preventing the powder from being blown away by the wind and ensuring that the powder is firmly attached to the uneven position.

[0075] Step 4: Under normal conditions (flat base layer), the monitoring arm 3 rotates back to the initial horizontal position under the action of the torsion spring. The first reset spring 50 pushes the second adjusting block 56 upward to return to its original position. The mounting bracket 582 drives the compaction roller 583 to retract and reset under the action of the spring. The push rod 31 no longer pushes the first torsion spring plate 42 into the powder box 4. The discharge port is closed, and the release of powder stops.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A flatness monitoring device for base construction, characterized in that, include: The self-propelled module (2) is used to drive the entire flatness monitoring device to move forward autonomously on the base construction surface, so as to realize continuous and automated flatness detection operation. The monitoring arm (3) is installed below the self-propelled module (2) to detect the flatness of the base surface in real time and trigger a marking action when unevenness is detected. The powder box (4), which is installed on one side of the self-propelled module (2) and above the monitoring arm (3), is used to store marking powder and release powder for marking when uneven protrusions appear on the base surface; Adjustment component (5), which is installed on one side of powder box (4), is used to cooperate with the powder marking of powder box (4) so ​​that the powder sprinkled on the base surface can be firmly attached to the uneven position and prevent the powder from being blown away by the wind; The monitoring arm (3) is rotatably connected to both sides of the self-propelled module (2) through a torsion spring. The torsion spring is sleeved on the rotating shaft between the monitoring arm (3) and the self-propelled module (2). The pre-tightening force of the torsion spring in the monitoring arm (3) makes the monitoring roller at the end of the monitoring arm (3) always have a tendency to rotate towards the surface of the base layer, so that the monitoring roller and the surface of the base layer maintain a constant contact pressure. A push rod (31) is fixedly installed between the monitoring arms (3), and a connecting rod (32) is fixedly installed on one side of the push rod (31).

2. The flatness monitoring device for base construction according to claim 1, characterized in that, The self-propelled module (2) is symmetrically provided with mounting brackets (1) on both sides. The two mounting brackets (1) are symmetrically arranged on the left and right sides of the self-propelled module (2) to provide symmetrical support and installation base for the monitoring arm (3), powder box (4) and adjustment component (5). The two mounting brackets (1) are horizontally arranged to provide a precise horizontal reference plane for the monitoring arm (3).

3. The flatness monitoring device for base construction according to claim 1, characterized in that, The powder box (4) is fixedly installed with a discharge platform (41) at the lower end. A second torsion spring plate (43) is rotatably installed on one side of the upper end of the discharge platform (41). A first torsion spring plate (42) is fixedly installed on the lower end of the powder box (4) away from the discharge platform (41). Multiple powder discharge slots (44) are evenly opened on the second torsion spring plate (43). The push rod (31) lightly touches the lower surface of the first torsion spring plate (42) when the base layer is flat.

4. The flatness monitoring device for base construction according to claim 3, characterized in that, The upper end of the material drop platform (41) is inclined, and the material drop platform (41), the first torsion spring plate (42), and the second torsion spring plate (43) form a cavity in the original state.

5. The flatness monitoring device for base construction according to claim 4, characterized in that, The second torsion spring plate (43) has a circular arc cross section.

6. The flatness monitoring device for base construction according to claim 1, characterized in that, The adjustment assembly (5) includes a fixed box (51) symmetrically fixedly installed on both sides of the powder box (4). A first adjustment block (54) is slidably connected inside the fixed box (51). A limit block (53) is fixedly installed on one side of the first adjustment block (54). A sliding groove (52) is opened on one side of the fixed box (51). The limit block (53) is slidably connected to the sliding groove (52). The other end of the limit block (53) is set in the groove at the end of the connecting rod (32) away from the monitoring arm (3).

7. The flatness monitoring device for base construction according to claim 6, characterized in that, A movable block (55) is slidably connected inside the fixed box (51). A second adjusting block (56) is provided on one side of the movable block (55). The second adjusting block (56) is slidably connected to the fixed box (51). A second return spring (57) is installed on one side of the movable block (55). A first return spring (50) is fixedly installed at the lower end of the second adjusting block (56). A compaction module (58) is installed on one side of the second adjusting block (56).

8. The flatness monitoring device for base construction according to claim 7, characterized in that, The movable block (55) is symmetrically arranged with wedge-shaped surfaces on both sides, and the first adjusting block (54) and the second adjusting block (56) are both arranged with wedge-shaped surfaces on the side closest to the movable block (55).

9. The flatness monitoring device for base construction according to claim 7, characterized in that, The compaction module (58) includes an adjustment frame (581) fixedly connected to one side of the second adjustment block (56). A mounting frame (582) is slidably connected inside the adjustment frame (581). A compaction roller (583) is rotatably connected inside the mounting frame (582). Multiple compaction blocks (584) are circumferentially mounted on the compaction roller (583). The compaction blocks (584) are arranged in a trapezoidal shape that is narrower at the top and wider at the bottom. A spring is installed between the mounting frame (582) and the adjustment frame (581).

10. The method for monitoring the flatness of base course construction according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Level the mounting bracket (1) so that the two horizontally set mounting brackets (1) are in a horizontal state, providing a precise horizontal reference surface for the monitoring arm (3). Start the self-propelled module (2) to drive the monitoring arm (3) to move forward autonomously on the base construction surface. The monitoring roller at the end of the monitoring arm (3) maintains a constant contact pressure with the base surface, and the continuous and automated flatness detection operation begins. Step 2: When the monitoring arm (3) encounters an uneven surface on the base layer, it rotates. The rotation of the monitoring arm (3) simultaneously drives the push rod (31) and the connecting rod (32) to rotate. The push rod (31) pushes the first torsion spring plate (42), and the first torsion spring plate (42) pushes the second torsion spring plate (43), causing the powder that originally entered the cavity from the powder drop trough (44) to fall to the ground and mark the uneven position with powder. Step 3: The connecting rod (32) rotates and drives the limiting block (53) to move. The limiting block (53) drives the first adjusting block (54) to slide upward. The first adjusting block (54) drives the second adjusting block (56) to slide downward through the wedge-shaped surface of the moving block (55). This causes the adjusting frame (581) to drive the compacting roller (583) to compact the scattered powder downward, preventing the powder from being blown away by the wind and ensuring that the powder is firmly attached to the uneven position. Step 4. Under normal conditions (flat base layer), the monitoring arm (3) rotates back to the initial horizontal position under the action of the torsion spring. The first reset spring (50) pushes the second adjusting block (56) upward back to its original position. The mounting bracket (582) drives the compaction roller (583) upward under the action of the spring to retract and reset. The push rod (31) no longer pushes the first torsion spring plate (42) into the powder box (4). The discharge port is closed, and the powder release stops.

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