Concrete pouring thickness detection device for house safety

Abstract

The invention discloses a concrete pouring thickness detection device for house safety, and particularly relates to the technical field of concrete detection, the concrete pouring thickness detection device comprises a supporting rod, the outer circle wall surface of the supporting rod is movably sleeved with a sliding block, the bottom surface of the supporting rod is fixedly provided with a moving frame, and the top surface of the moving frame is fixedly provided with a PLC; the continuous detection assembly is arranged on one side of the sliding block and used for continuously detecting the thickness in the concrete pouring process; through a first laser range finder and a moving frame, when a PLC controls an electric motor to drive a walking wheel to rotate, a supporting rod and the first laser range finder can be driven to move synchronously with the concrete pouring speed, difference calculation is conducted through the pre-stored ground reference distance and the concrete surface distance measured in real time, and the pouring thickness is output in real time; synchronous continuous operation of detection and pouring is achieved, interruption of construction rhythm caused by traditional pump stopping and drill rod inserting is avoided, and quality risks such as cold joints and bleeding caused by pouring interruption are eliminated.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, specifically to a device for detecting the thickness of concrete pouring for building safety. Background Technology

[0002] In building construction and safety assessment of existing buildings, the thickness of concrete floor slabs, shear walls, and other structural elements is a key control indicator for evaluating project quality and ensuring structural load-bearing capacity and durability. If the floor slab thickness does not meet design requirements, it will directly affect the structural safety of the building, potentially leading to serious problems such as floor cracking, water seepage, and even insufficient load-bearing capacity. Therefore, accurate and efficient testing of concrete pouring thickness is a crucial step in project quality acceptance and safety assessment.

[0003] In existing technologies, the thickness control of horizontal components such as floor slabs and walls is a core indicator for ensuring structural safety and load-bearing capacity during concrete pouring. However, existing concrete thickness detection methods generally adopt the "post-construction acceptance" or "intermittent sampling inspection" mode, which makes it difficult to achieve dynamic monitoring in sync with the pouring operation. Traditional thickness gauges require pausing pouring before the concrete has initially set, with the gauge manually inserted to read the thickness. Construction can only resume after the reading is complete. This "stop-measure-resume" pattern severely disrupts the continuous flow of concrete pouring, especially in large-volume concrete or high-rise building slab pouring. Frequent pump stops and starts not only reduce construction efficiency but can also lead to prolonged concrete retention in the pumping pipes, increasing the risk of blockages. Furthermore, during the interruption, the poured surface is prone to bleeding or initial setting, easily forming cold joints at the joint between old and new concrete after pouring resumes, posing a quality risk to the structural integrity and waterproofing performance. Secondly, existing ultrasonic or electromagnetic thickness gauges are mostly used for acceptance testing after concrete has hardened or for spot checks during pouring intervals. By the time insufficient thickness is detected, the optimal adjustment time has often passed, requiring remedial measures such as grinding and grouting after the concrete has solidified. This not only creates... This leads to material waste and construction delays. Furthermore, poor bonding between the grout layer and the original structure can create new weak areas. Additionally, these instruments are ineffective when the concrete is still in a fluid state due to high internal water content and structural instability. Ultrasonic signals suffer severe attenuation, and electromagnetic signals are easily distorted, making it difficult to provide reliable data. More importantly, existing testing methods acquire discrete point values, failing to achieve real-time linkage between measurement results and construction operations. Construction workers cannot know the thickness deviation of the current area in real time during pouring and can only control the thickness of the material placement and vibration based on experience. This "blind pouring" mode is highly dependent on the skill level of the workers, making it difficult to guarantee thickness uniformity. Single-point sampling is also prone to missing local weak areas caused by slight deformation of the formwork or uneven vibration, failing to generate continuous cross-sectional thickness distribution data. When quality problems arise later, there is a lack of traceable process records. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a concrete pouring thickness detection device for building safety, thereby solving the problems mentioned in the background section.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A concrete pouring thickness detection device for building safety includes: a support rod, a sliding block movably sleeved on the outer circular wall of the support rod, a movable frame fixedly installed on the bottom surface of the support rod, and a PLC controller fixedly installed on the top surface of the movable frame; a continuous detection component, disposed on one side of the sliding block, for continuously detecting the thickness of concrete during the pouring process; the continuous detection component includes: a lightweight frame, fixedly installed on one side of the sliding block, a first mounting frame disposed inside the lightweight frame, a first laser rangefinder fixedly installed inside the first mounting frame, and a movable frame fixedly installed on the bottom surface of the support rod. The mobile frame is equipped with wheels on both sides. An electric motor is fixedly installed inside the mobile frame. A connecting shaft is fixedly installed on one side of each wheel, and the connecting shaft is connected to the movable assembly of the mobile frame. The drive shaft of the electric motor is fixedly installed to the connecting shaft. The electric motor is electrically connected to the PLC controller, and the first laser rangefinder is electrically connected to the PLC controller. The lightweight frame has a displacement component inside for changing the detection position of the first laser rangefinder. The bottom surface of the lightweight frame has a component for pre-leveling the poured concrete. One side of the sliding block has a ground height detection component for assisting in the detection of concrete thickness. By adopting the above technical solution, and using the first laser rangefinder, the worker first uses the laser rangefinder to emit a laser beam and illuminate the ground to measure the distance from the laser rangefinder to the ground. Then, the worker pours concrete. Since the specific distance from the first laser rangefinder to the ground has been measured before, it is used again during the concrete pouring to measure the distance of the poured concrete. Due to the accumulation of concrete on the ground, the distance between the concrete and the first laser rangefinder is closer. The worker subtracts the distance the first laser rangefinder illuminates the concrete from the previously measured height of the first laser rangefinder from the ground to obtain the specific thickness of the poured concrete. During continuous concrete pouring, the worker can use the PLC controller to start the electric motor. The drive shaft of the electric motor rotates, which drives the connecting shaft and the traveling wheels to rotate. The rotation of the traveling wheels can then move the mobile frame and simultaneously move the support rod, lightweight frame, first mounting frame, and first laser rangefinder. The moving speed of the first mounting frame and the first laser rangefinder is kept in sync with the concrete pouring speed, thus enabling continuous thickness measurement during concrete pouring.

[0006] Preferably, the displacement assembly includes: a limiting post, which is fixedly installed inside the lightweight frame; a movable tube is movably sleeved on the outer circular wall of the limiting post; a moving rod is fixedly installed on the outer circular wall of the movable tube; two fixed rods are fixedly installed on the top surface of the lightweight frame; a fixed frame is fixedly installed between the two fixed rods; a servo motor is fixedly installed inside the fixed frame; a rotating platform is provided on the bottom surface of the fixed frame; a central post is fixedly installed on the top surface of the rotating platform; the drive shaft of the servo motor is fixedly installed to the central post; and the servo motor... The machine is electrically connected to the PLC controller. A rotating rod is movably sleeved inside the rotating table. A helical spring is movably sleeved on the outer circular wall of the rotating rod. An L-shaped plate is fixedly installed at one end of the rotating rod. The two ends of the helical spring are respectively fixedly installed to the L-shaped plate and the rotating table. A moving block is movably sleeved on the outer circular wall of the moving rod. A rotating column is fixedly installed on the top surface of the moving block. The rotating column is movably sleeved with the L-shaped plate. The first mounting bracket is fixedly installed with the moving block. The servo motor is electrically connected to the PLC controller.

[0007] By adopting the above technical solution, and through the first mounting frame, when the first laser rangefinder detects the thickness of the concrete, since the flatness of the concrete is uneven when it is first poured on the ground, the operator uses a servo motor. The drive shaft of the servo motor rotates, causing the central column to rotate. The central column then drives the rotating table, rotating rod, and L-shaped plate to rotate inside the lightweight frame. When the L-shaped plate and the moving block rotate to a position close to the support rod, the movable tube is in the middle position of the limiting column, and the first mounting frame and the first laser rangefinder are in a position close to the support rod. When the central column drives the rotating table, rotating rod, and L-shaped plate to rotate to a position close to the lightweight frame... When the L-shaped plate moves to the inner side of the lightweight frame, it pulls the rotating column, causing the moving block to move. The moving block then moves the moving rod and movable tube across the surface of the limiting column. When the movable tube slides to one end of the limiting column, the movable tube, moving rod, and moving block stop moving. Then, the central column drives the rotating table, rotating rod, and L-shaped plate to continue rotating. At this point, the moving block is located at the inner corner of the lightweight frame. The L-shaped plate compresses the helical spring and moves closer to the rotating table. The L-shaped plate then continues to pull the rotating column, causing the moving block to slide across the surface of the moving rod. At this time, the movable tube and moving rod remain stationary, both close to the inner side of the lightweight frame. The rotation of the rotating table and rotating rod... The rotating rod causes the moving block to slide on the surface of the moving rod. When the rotating rod rotates to a position where it intersects the moving rod, the moving block will drive the first mounting bracket and the first laser rangefinder to move to the middle position of the moving rod. At this point, the movement paths of the stepper motor and the first laser rangefinder form an L-shape. As the moving block continues to slide on the surface of the moving rod, the first mounting bracket, the first laser rangefinder, and the moving block will gradually approach the position of the movable tube. Then, the rotating rod and the rotating table will drive the L-shaped plate and the moving block to continue rotating. At this time, the L-shaped plate near the movable tube will push the moving rod and the movable tube to slide on the surface of the limiting post under the rotational force of the rotating rod. The first mounting bracket, the first laser rangefinder, and the moving block are positioned close to the movable tube. As the moving block pushes, the moving rod and the movable tube can be pushed to the other side of the limiting post. With the continuous rotation of the rotating rod, the rotating rod will drive the L-shaped plate, the moving block, and the first mounting bracket to slide along the surface of the moving rod again, away from the position of the movable tube. By continuously rotating in this way, the first mounting bracket and the first laser rangefinder can achieve a square trajectory movement, thereby changing the position of the first laser rangefinder and detecting the thickness of the concrete from different positions, so as to determine whether the concrete is too thick or too thin at a certain point during pouring.

[0008] Preferably, the pre-leveling assembly includes: two limiting platforms, both of which are fixedly installed on the bottom surface of the lightweight frame. Each limiting platform has a limiting hole on one side. Fixed plates are fixedly installed on both sides of the lightweight frame. A stepper motor is fixedly installed on one side of each fixed plate. A connecting arm is provided between the fixed plate and the lightweight frame. The drive shaft of the stepper motor is fixedly installed to the connecting arm. A translation plate is provided between the lightweight frame and the fixed plate. A sliding hole is provided on one side of the translation plate. A connecting block is slidably connected inside the sliding hole. The connecting block is slidably connected to the limiting hole. A rotating block is fixedly installed on the side of the connecting block closest to the fixed plate. The connecting arm is movably sleeved with the rotating block. Push plates are fixedly installed on the sides of the two translation plates that are close to each other.

[0009] By adopting the above technical solution, and through the set push plate, while the worker is continuously pouring concrete, the first laser rangefinder will detect the thickness of the concrete. Then, the worker uses a stepper motor and the drive shaft of the stepper motor to rotate the connecting arm. When the end of the connecting arm near the rotating block rotates, the end of the connecting arm near the rotating block first rotates upward. The connecting arm pushes the rotating block and drives the connecting block to move, so that it slides upward inside the sliding hole. As the connecting arm continues to rotate, when the connecting arm gradually approaches the position of the fixed plate, the connecting block will gradually approach the inner top surface of the sliding hole. Then, the connecting block will drive the translation plate to move inside the limiting hole. Through the continuous rotation of the connecting arm, the translation plate will drive the push plate to reciprocate along the inside of the limiting hole. At this time, the worker can let the push plate approach the freshly poured concrete. By moving the push plate, the concrete can be leveled and scraped, so that the first laser rangefinder can detect the thickness of the concrete.

[0010] Preferably, two mini electric hoists are fixedly installed on the top surface of the support rod, and the ropes of the mini electric hoists are fixedly installed to the lightweight frame.

[0011] By adopting the above technical solution and using the mini electric hoist, when workers are inspecting concrete, the extension and retraction of the mini electric hoist can move the sliding block, lightweight frame, first mounting frame, and first laser rangefinder downwards along the surface of the support rod. This allows the first laser rangefinder and the push plate to approach the concrete, thereby reducing the distance between the first laser rangefinder and the concrete, and allowing the push plate to release the freshly poured concrete.

[0012] Preferably, the ground height detection component includes: a gravity frame, the gravity frame being fixedly installed on one side of the sliding block, a support column being fixedly installed inside the gravity frame, an adjusting sleeve being movably sleeved on the outer circular wall of the support column, a second mounting bracket being fixedly installed on the outer circular wall of the adjusting sleeve, and a second laser rangefinder being fixedly installed inside the second mounting bracket.

[0013] By adopting the above technical solution, and using a second laser rangefinder positioned at the same horizontal level as the first laser rangefinder, when workers are continuously pouring concrete and conducting continuous inspections, since the ground is not uniformly flat and uneven, and continuous inspections require repositioning the road surface to the height of the first laser rangefinder, the second laser rangefinder's laser beam can reach directly to the ground, while the first laser rangefinder's laser beam continuously illuminates the poured concrete. By calculating the phase difference between the second laser rangefinder's beam to the ground and the first laser rangefinder's beam to the concrete surface, the thickness of the poured concrete can be obtained. With the use of both the second and first laser rangefinders, depressions and protrusions in the ground can be quickly identified. The phase difference between the electric motor's beam to depressions is greater than that between the first laser rangefinder's beam to the concrete, while the phase difference between the second laser rangefinder's beam to protrusions is smaller.

[0014] Preferably, two spring buckles are fixedly installed on the outer circular wall of the support column, and several slots are opened on the inner circular wall of the adjusting sleeve, with the spring buckles movably engaging with the slots.

[0015] By adopting the above technical solution, and through the spring buckle, the operator can rotate the adjustment sleeve to drive the second mounting bracket and the second laser rangefinder to rotate around the support column, and make the spring buckle alternately engage between multiple slots. This allows the position of the second laser rangefinder to be adjusted within a semi-circular arc range so that the laser of the second laser rangefinder can illuminate the ground.

[0016] Preferably, two balance columns are fixedly installed on the bottom surface of the support rod.

[0017] By adopting the above technical solution, the weight on both sides of the support rod is balanced by setting up a balance column.

[0018] Preferably, the bottom surface of the mobile frame is provided with several tracks, and the top surface of the tracks has two walking grooves. The walking grooves are movably connected to the walking wheels. A friction belt is fixedly installed on the inner bottom surface of the walking grooves. Two limiting rods and a locking post are fixedly installed on one side of the tracks. Two docking grooves and a locking groove are provided on the other side of the tracks. The locking grooves are movably locked with the locking posts, and the limiting rods are movably locked with the docking grooves. Several tracks are spliced ​​end to end with the limiting rods and the docking grooves through the locking grooves and the locking posts.

[0019] By adopting the above technical solution, three tracks are set up, and the traveling wheels roll inside the traveling grooves. Since multiple traveling grooves are spliced ​​into a straight line, the traveling wheels can only travel in a straight line when rolling inside the traveling grooves. The three tracks are connected end to end by the snap-fit ​​of the locking post and the locking of the locking post and the docking groove. After the support rod has traveled from the first track, the worker can move the track to detach from the second track, and then splice the first track to the end of the third track, and so on, so that the support rod can travel further along a straight line.

[0020] In summary, the present invention has the following main beneficial effects: 1. This invention uses a first laser rangefinder and a mobile frame. When the electric motor drives the walking wheels to rotate under the control of the PLC controller, it can drive the support rod and the first laser rangefinder to move synchronously with the concrete pouring speed. By calculating the difference between the pre-stored ground reference distance and the real-time measured concrete surface distance, the pouring thickness is output in real time. This realizes the synchronous and continuous operation of detection and pouring, avoids the interruption of the construction cycle caused by the traditional pump stop and rod insertion, and eliminates the quality risks such as cold joints and bleeding caused by interrupted pouring. 2. This invention uses a first mounting frame and a servo motor. When the servo motor drives the rotary table, rotating rod, and L-shaped plate to rotate, the L-shaped plate drives the moving block to slide on the moving rod through the rotating column. At the same time, the moving rod moves horizontally on the limiting column through the movable tube. The combination of these two movements causes the moving block to drive the first laser rangefinder to achieve continuous scanning of a square trajectory in the horizontal plane, realizing multi-point coverage detection of the casting section. This avoids missing local areas that are too thick or too thin in single-point sampling and provides comprehensive thickness distribution data for subsequent leveling and adjustment. 3. The present invention uses a push plate and a stepper motor. When the stepper motor drives the connecting arm to rotate, the connecting arm drives the translation plate to move back and forth in the limiting hole through the rotating block and the connecting block. This causes the push plate to be closely attached to the surface of the freshly poured concrete and scraped back and forth. The concrete is initially leveled before laser thickness measurement is performed, which eliminates the surface undulation caused by uneven material distribution and improves the representativeness and accuracy of the thickness measurement data. 4. This invention uses a mini electric hoist, whose telescopic rope drives the sliding block to move up and down along the support rod, thereby raising and lowering the lightweight frame and the first laser rangefinder as a whole. The height of the laser rangefinder can be adjusted according to the thickness of the poured layer to keep it within the optimal measurement range and ensure data accuracy. At the same time, the push plate is made to fit the concrete surface to ensure the leveling effect. 5. The present invention uses a second laser rangefinder, which is on the same horizontal line as the first laser rangefinder. During continuous detection, the second laser rangefinder always illuminates the unpoured original ground, while the first laser rangefinder always illuminates the poured concrete surface. The actual thickness of the concrete is obtained in real time by calculating the difference between the two measurements. The invention automatically compensates for the reference deviation caused by the unevenness of the original ground, eliminating the need for manual remeasurement of the ground reference and ensuring that the thickness calculation result truly reflects the concrete filling thickness. 6. This invention uses a track and a traveling wheel. The traveling wheel is embedded in the traveling groove of the track and rolls, restricting the direction of movement to a straight line. The tracks are connected end to end by snap-fit ​​posts and limiting rods. After the support rod has traveled through one section of track, it can be disassembled and spliced ​​to the end of the subsequent track, realizing the cyclical use of the track. This allows the detection device to extend infinitely along a straight line as the pouring progress progresses, meeting the detection needs of continuous construction of large-span floor slabs or long-distance road surfaces. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support rod structure of the present invention; Figure 3 This is a schematic diagram of the sliding block structure of the present invention; Figure 4 This is a schematic diagram of the mobile frame structure of the present invention; Figure 5 This is a schematic diagram of the lightweight frame structure of the present invention; Figure 6 This is a schematic diagram of the movable block structure of the present invention; Figure 7 This is a schematic diagram of the push plate structure of the present invention; Figure 8 yes Figure 7 A partial structural diagram of A in the middle; Figure 9 This is a schematic diagram of the gravity frame structure of the present invention; Figure 10 This is a schematic diagram of the second mounting bracket structure of the present invention; Figure 11 This is a schematic diagram of the track structure of the present invention.

[0022] Reference numerals: 1. Support rod; 2. Sliding block; 3. Lightweight frame; 4. First mounting frame; 5. First laser rangefinder; 6. Moving frame; 7. Walking wheel; 8. Electric motor; 9. Connecting shaft; 10. Limiting post; 11. Movable tube; 12. Moving rod; 13. Fixed rod; 14. Fixed frame; 15. Servo motor; 16. Rotary table; 17. Rotating rod; 18. Helical spring; 19. L-shaped plate; 20. Moving block; 21. Rotating column; 22. Center column; 23. Fixed plate; 24. Step 25. Motor; 26. Limiting platform; 27. Connecting arm; 28. Limiting hole; 29. ​​Translation plate; 30. Sliding hole; 31. Connecting block; 32. Rotating block; 33. Push plate; 34. Mini electric hoist; 35. Gravity frame; 36. Support column; 37. Adjusting sleeve; 38. Second mounting bracket; 39. Second laser rangefinder; 40. Spring buckle; 41. Slot; 42. Balance column; 43. Track; 44. Traveling groove; 45. Snap-fit ​​column; 46. Limiting rod; 47. Snap-fit ​​groove; 48. Docking groove. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7A concrete pouring thickness detection device for building safety includes a support rod 1, a sliding block 2 movably sleeved on the outer circular wall of the support rod 1, a movable frame 6 fixedly installed on the bottom surface of the support rod 1, a PLC controller fixedly installed on the top surface of the movable frame 6, and a continuous detection component provided on one side of the sliding block 2 for continuously detecting the thickness of the concrete during the pouring process. The continuous detection component includes a lightweight frame 3, which is fixedly installed on one side of the sliding block 2. A first mounting frame 4 is provided inside the lightweight frame 3, and a first laser rangefinder 5 is fixedly installed inside the first mounting frame 4. A movable frame 6 is fixedly installed on the top surface. Wheels 7 are provided on both sides of the movable frame 6. An electric motor 8 is fixedly installed inside the movable frame 6. A connecting shaft 9 is fixedly installed on one side of each wheel 7. The connecting shaft 9 is connected to the movable frame 6. The drive shaft of the electric motor 8 is fixedly installed to the connecting shaft 9. The electric motor 8 is electrically connected to the PLC controller. The first laser rangefinder 5 is electrically connected to the PLC controller. Two mini electric hoists 33 are fixedly installed on the top surface of the support rod 1. The ropes of the mini electric hoists 33 are fixedly installed to the lightweight frame 3. Two balance columns 41 are fixedly installed on the bottom surface of the support rod 1. Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 and Figure 11 The bottom surface of the mobile frame 6 is provided with several tracks 42. The top surface of the track 42 is provided with two walking grooves 43. The walking grooves 43 are movably connected to the walking wheels 7. The inner bottom surface of the walking grooves 43 is fixedly installed with friction belts. Two limiting rods 45 and a locking post 44 are fixedly installed on one side of the track 42. Two docking grooves 47 and a locking groove 46 are provided on the other side of the track 42. The locking groove 46 is movably locked with the locking post 44, and the limiting rods 45 are movably locked with the docking grooves 47. Several tracks 42 are spliced ​​end to end with the limiting rods 45 and the docking grooves 47 through the locking grooves 46 and the locking post 44. Using the first laser rangefinder 5, the staff first emits a laser to the ground to measure the initial distance from the first laser rangefinder 5 to the ground. Then, the concrete pouring operation begins. As the concrete accumulates, the surface rises, and the distance between the first laser rangefinder 5 and the concrete surface shortens. By subtracting the previously measured ground distance from the currently measured concrete surface distance, the concrete pouring thickness can be calculated in real time. During continuous pouring, the staff starts the electric motor 8 through the PLC controller. The electric motor 8 drives the connecting shaft 9 and the walking wheels 7 to rotate, which in turn moves the entire moving frame 6. This causes the support rod 1, the lightweight frame 3, the first mounting frame 4, and the first laser rangefinder 5 to move synchronously. By controlling the moving speed to keep it consistent with the concrete pouring speed, the detection and pouring are synchronized and continuous. By calculating the difference between the preset ground benchmark and the real-time measurement value, the current area concrete thickness is directly output. The data is intuitive and the calculation is simple. With the mini electric hoist 33 in place, when different pouring heights or the detection distance need to be adjusted, the staff can start the mini electric hoist 33. The telescopic rope of the mini electric hoist 33 drives the sliding block 2 to move up and down along the support rod 1, which in turn drives the lightweight frame 3, the first mounting frame 4 and the first laser rangefinder 5 to rise and fall as a whole. Through this adjustment, the first laser rangefinder 5 can be brought closer to the concrete surface, reducing the measurement range and improving accuracy. The height of the laser rangefinder can be adjusted according to the thickness of the poured layer to keep it within the optimal measurement range and ensure data accuracy. To ensure the device travels in a straight line along a predetermined path, three or more tracks 42 are provided. The tracks 42 have travel grooves 43, and the travel wheels 7 are embedded in the travel grooves 43 to roll, restricting the direction of movement to a straight line. The tracks 42 are connected to the limiting rods 45 by snap-fit ​​posts 44. The limiting rods 45 are inserted into the docking grooves 47 to achieve end-to-end connection. After the support rod 1 has traveled the first section of track, the staff can disassemble the section of track and splice it to the end of the subsequent track to achieve the cyclic use of the track, so that the device can extend indefinitely along a straight line. Through the cyclic splicing of the track, the detection device can continue to move forward with the pouring progress, meeting the needs of continuous construction of large-span floor slabs or long-distance road surfaces.

[0025] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7The lightweight frame 3 has a displacement assembly inside for changing the detection position of the first laser rangefinder 5. The displacement assembly includes a limiting post 10, which is fixedly installed inside the lightweight frame 3. A movable tube 11 is movably sleeved on the outer circular wall of the limiting post 10. A moving rod 12 is fixedly installed on the outer circular wall of the movable tube 11. Two fixed rods 13 are fixedly installed on the top surface of the lightweight frame 3. A fixed frame 14 is fixedly installed between the two fixed rods 13. A servo motor 15 is fixedly installed inside the fixed frame 14. A rotating platform 16 is provided on the bottom surface of the fixed frame 14. A central column 22 is fixedly installed on the top surface of the rotating platform 16. The servo motor 15 drives... The moving shaft is fixedly installed with the central column 22. The servo motor 15 is electrically connected to the PLC controller. The rotating rod 17 is movably sleeved inside the rotating table 16. The outer circular wall of the rotating rod 17 is movably sleeved with a helical spring 18. One end of the rotating rod 17 is fixedly installed with an L-shaped plate 19. The two ends of the helical spring 18 are fixedly installed with the L-shaped plate 19 and the rotating table 16, respectively. The outer circular wall of the moving rod 12 is movably sleeved with a moving block 20. The top surface of the moving block 20 is fixedly installed with a rotating column 21. The rotating column 21 is movably sleeved with the L-shaped plate 19. The first mounting bracket 4 is fixedly installed with the moving block 20. The servo motor 15 is electrically connected to the PLC controller. Because the surface of the concrete is uneven when it is first poured, single-point detection is difficult to reflect the overall thickness distribution. Therefore, the staff starts the servo motor 15, whose drive shaft drives the central column 22 to rotate, which in turn drives the rotating table 16, rotating rod 17 and L-shaped plate 19 to rotate inside the lightweight frame 3. The L-shaped plate 19 is connected to the moving block 20 through the rotating column 21. The moving block 20 is fitted onto the moving rod 12. The moving rod 12 is fitted onto the limiting column 10 through the movable tube 11. As the rotating rod 17 continues to rotate, the L-shaped plate 19 drives the moving block 20 to slide on the surface of the moving rod 12. At the same time, the moving rod... 12 moves horizontally on the limiting post 10 via the movable tube 11. The two movements are superimposed, causing the movable block 20 to drive the first mounting frame 4 and the first laser rangefinder 5 to achieve continuous "square trajectory" movement in the horizontal plane. The specific movement process is as follows: the movable block 20 first slides along the movable rod 12 to one end, then pushes the movable rod 12 to move horizontally to the other side of the limiting post 10, and then slides along the movable rod 12 in the opposite direction. This cycle is repeated to form a continuous square path, so that a single laser rangefinder can automatically move the measuring point in the same area according to the square trajectory, realize multi-point scanning of the casting section, and avoid missing the detection of local areas that are too thick or too thin in single-point sampling.

[0026] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 and Figure 8The bottom surface of the lightweight frame 3 is provided with a pre-leveling component for the poured concrete. The pre-leveling component includes two limiting platforms 25, both of which are fixedly installed on the bottom surface of the lightweight frame 3. A limiting hole 27 is opened on one side of the limiting platform 25. Fixed plates 23 are fixedly installed on both sides of the lightweight frame 3. A stepper motor 24 is fixedly installed on one side of the fixed plate 23. A connecting arm 26 is provided between the fixed plate 23 and the lightweight frame 3. The drive shaft of the stepper motor 24 is fixedly installed to the connecting arm 26. A translation plate 28 is provided between the lightweight frame 3 and the fixed plate 23. A sliding hole 29 is opened on one side of the translation plate 28. A connecting block 30 is slidably connected inside the sliding hole 29. The connecting block 30 is slidably connected to the limiting hole 27. A rotating block 31 is fixedly installed on the side of the connecting block 30 near the fixed plate 23. The connecting arm 26 is movably sleeved with the rotating block 31. Push plate 32 is fixedly installed on the side of the two translation plates 28 that are close to each other. With the push plate 32 in place, while continuous concrete pouring and thickness measurement are being carried out, the staff starts the stepper motor 24. Its drive shaft drives the connecting arm 26 to rotate. One end of the connecting arm 26 is movably connected to the rotating block 31. The rotating block 31 is installed in the sliding hole 29 of the translation plate 28 through the connecting block 30. The translation plate 28 is fitted into the limiting hole 27. When the connecting arm 26 rotates, it drives the rotating block 31 and the connecting block 30 to slide in the sliding hole 29, thereby driving the translation plate 28 to reciprocate in the limiting hole 27. The reciprocating motion of the translation plate 28 drives the push plate 32 to reciprocate and scrape against the freshly poured concrete surface, initially leveling the concrete. This initial leveling of the concrete surface before laser thickness measurement eliminates local accumulation caused by uneven material distribution, making the detection surface flatter and improving the representativeness and accuracy of the thickness measurement data.

[0027] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 9 and Figure 10 A ground height detection component for assisting in concrete thickness detection is provided on one side of the sliding block 2. The ground height detection component includes a gravity frame 34, which is fixedly installed on one side of the sliding block 2. A support column 35 is fixedly installed inside the gravity frame 34. An adjusting sleeve 36 is movably sleeved on the outer circular wall of the support column 35. A second mounting frame 37 is fixedly installed on the outer circular wall of the adjusting sleeve 36. A second laser rangefinder 38 is fixedly installed inside the second mounting frame 37. Two spring buckles 39 are fixedly installed on the outer circular wall of the support column 35. Several slots 40 are opened on the inner circular wall of the adjusting sleeve 36. The spring buckles 39 are movably engaged with the slots 40. During continuous pouring and testing, the ground is not perfectly flat and has uneven surfaces. To address this issue, the device is equipped with a second laser rangefinder 38 on the support column 35 via an adjusting sleeve 36 and a second mounting bracket 37. This second laser rangefinder 38 is positioned on the same horizontal line as the first laser rangefinder 5. During testing, the laser from the second laser rangefinder 38 always illuminates the unpoured original ground, while the laser from the first laser rangefinder 5 always illuminates the poured concrete surface. By calculating the difference between the distance from the second laser rangefinder 38 to the ground and the distance from the first laser rangefinder 5 to the concrete surface, the actual thickness of the concrete can be directly obtained. When the ground is concave, the reading from the second laser rangefinder 38 increases, and the difference between the reading and the reading from the first laser rangefinder 5 increases accordingly. When the ground is convex, the difference decreases. This calculation process is completed automatically, and the compensated thickness value is output in real time. Through simultaneous dual-laser measurement, the reference deviation caused by the unevenness of the original ground is compensated in real time, ensuring that the thickness calculation result truly reflects the actual filling thickness of the concrete, rather than the absolute distance change from the surface to a fixed point. To adapt to the detection needs in different directions, the staff can rotate the second mounting bracket 37 and the second laser rangefinder 38 around the support column 35 by rotating the adjustment sleeve 36. The spring buckle 39 is alternately engaged between multiple slots 40 to achieve indexing and positioning, so that the second laser rangefinder 38 can adjust the irradiation angle within a semi-circular arc range to ensure that the laser can accurately irradiate the designated position on the ground.

[0028] Working principle: Please refer to Figures 1-11 As shown, using the first laser rangefinder 5, the worker first uses it to emit a laser beam onto the ground, measuring the distance from the rangefinder 5 to the ground. Then, during concrete pouring, since the distance from the rangefinder 5 to the ground has already been measured, it is used again to check the distance to the poured concrete. Due to the accumulation of concrete on the ground, the distance between the concrete and the first laser rangefinder 5 is closer. The worker then subtracts the distance from the previously measured height of the rangefinder 5 from the ground. The distance at which the instrument 5 illuminates the concrete determines the specific thickness of the concrete after pouring. During continuous concrete pouring, the operator can use a PLC controller to start the electric motor 8. The drive shaft of the electric motor 8 rotates, causing the connecting shaft 9 and the traveling wheel 7 to rotate. In turn, the rotation of the traveling wheel 7 can move the moving frame 6 and simultaneously move the support rod 1, the lightweight frame 3, the first mounting frame 4, and the first laser rangefinder 5. The moving speed of the first mounting frame 4 and the first laser rangefinder 5 is kept in line with the concrete pouring speed, thus enabling continuous thickness detection during concrete pouring.

[0029] When the first laser rangefinder 5 detects the thickness of the concrete using the first mounting frame 4, the unevenness of the concrete when it is first poured on the ground is a concern. The operator uses a servo motor 15, whose drive shaft rotates to rotate the central column 22. The central column 22 then rotates the rotating table 16, rotating rod 17, and L-shaped plate 19 inside the lightweight frame 3. When the L-shaped plate 19 and moving block 20 rotate to a position close to the support rod 1, the movable tube 11 is in the middle of the limiting column 10, and the first mounting frame 4 and the first laser rangefinder 5 are close to the support rod 1. When the central column 22 rotates the rotating table 16, rotating rod 17, and L-shaped plate 19 to a position close to the inside of the lightweight frame 3, the L-shaped plate 19 will pull... The rotating column 21 drives the moving block 20 to move, which in turn drives the moving rod 12 and the movable tube 11 to translate on the surface of the limiting column 10. When the movable tube 11 slides to one end of the limiting column 10, the movable tube 11, the moving rod 12, and the moving block 20 stop moving. Then, the central column 22 drives the rotating table 16, the rotating rod 17, and the L-shaped plate 19 to continue rotating. At this time, the moving block 20 is located at the inner corner of the lightweight frame 3. The L-shaped plate 19 will compress the coil spring 18 and move closer to the position of the rotating table 16. Then, the L-shaped plate 19 will continue to pull the rotating column 21 to drive the moving block 20 to slide on the surface of the moving rod 12. At this time, the positions of the movable tube 11 and the moving rod 12 are fixed, both close to the inside of the lightweight frame 3. The rotating table 16 and the rotating rod The rotation of 17 causes the moving block 20 to slide on the surface of the moving rod 12. When the rotating rod 17 rotates to a state where it intersects with the moving rod 12, the moving block 20 will drive the first mounting bracket 4 and the first laser rangefinder 5 to move to the middle position of the moving rod 12. At this point, the movement paths of the stepper motor 24 and the first laser rangefinder 5 form an L-shape. As the moving block 20 continues to slide on the surface of the moving rod 12, the first mounting bracket 4, the first laser rangefinder 5, and the moving block 20 will gradually approach the position of the movable tube 11. Then, the rotating rod 17 and the rotating table 16 drive the L-shaped plate 19 and the moving block 20 to continue rotating. At this time, the L-shaped plate 19, which is close to the movable tube 11, will push the moving rod 12 and the movable tube 11 against the limiting post 1 under the rotational force of the rotating rod 17. The surface of the 0 slides, at which point the first mounting bracket 4, the first laser rangefinder 5, and the moving block 20 are close to the position of the movable tube 11. As the moving block 20 pushes, the moving rod 12 and the movable tube 11 can be pushed to the other side of the limiting post 10. Under the continuous rotation of the rotating rod 17, the rotating rod 17 will drive the L-shaped plate 19, the moving block 20, and the first mounting bracket 4 to slide along the surface of the moving rod 12 again, away from the position of the movable tube 11. By continuously rotating in this way, the first mounting bracket 4 and the first laser rangefinder 5 can achieve square trajectory movement, thereby changing the position of the first laser rangefinder 5 and detecting the thickness of the concrete from different positions, so as to determine whether the concrete is too thick or too thin at a certain point during pouring.

[0030] With the push plate 32 in place, while workers are continuously pouring concrete, the first laser rangefinder 5 detects the thickness of the concrete. Then, the workers use a stepper motor 24, whose drive shaft rotates, causing the connecting arm 26 to rotate. When the end of the connecting arm 26 near the rotating block 31 rotates, that end first rotates upwards, pushing the rotating block 31 and causing the connecting block 30 to move, sliding upwards inside the sliding hole 29. As the connecting arm 26 continues to rotate... As the connecting arm 26 gradually approaches the position of the fixed plate 23, the connecting block 30 will gradually approach the inner top surface of the sliding hole 29. Subsequently, the connecting block 30 will drive the translation plate 28 to move inside the limiting hole 27. Through the continuous rotation of the connecting arm 26, the translation plate 28 will drive the push plate 32 to move back and forth along the inside of the limiting hole 27. At this time, the staff can let the push plate 32 approach the freshly poured concrete. By moving the push plate 32, the concrete can be leveled and scraped to flatten it so that the first laser rangefinder 5 can detect the thickness of the concrete.

[0031] When workers inspect concrete using the mini electric hoist 33, the extension and retraction of the mini electric hoist 33 can move the sliding block 2, lightweight frame 3, first mounting frame 4, and first laser rangefinder 5 downwards along the surface of the support rod 1. This allows the first laser rangefinder 5 and the push plate 32 to approach the concrete, thereby reducing the distance between the first laser rangefinder 5 and the concrete, and allowing the push plate 32 to release the freshly poured concrete.

[0032] With the second laser rangefinder 38 positioned at the same horizontal level as the first laser rangefinder 5, continuous pouring and testing are possible. Since the ground is not uniformly flat or uneven, the height of the road surface needs to be repositioned to that of the first laser rangefinder 5 during continuous testing. The laser emitted by the second laser rangefinder 38 reaches the ground directly, while the laser from the first laser rangefinder 5 continuously illuminates the poured concrete. By calculating the phase difference between the second laser rangefinder 38 and the ground surface and the first laser rangefinder 5 and the concrete surface, the thickness of the poured concrete can be determined. With the use of both the second and first laser rangefinders, depressions and protrusions in the ground can be quickly identified. The phase difference between the electric motor 8 illuminating depressions and the first laser rangefinder 5 illuminating the concrete is greater than the phase difference between the second laser rangefinder 38 illuminating protrusions and the first laser rangefinder 5 illuminating the concrete. Conversely, the phase difference between the second laser rangefinder 38 illuminating protrusions and the first laser rangefinder 5 illuminating the concrete is smaller.

[0033] With the spring buckle 39 in place, the operator can rotate the adjustment sleeve 36 to drive the second mounting bracket 37 and the second laser rangefinder 38 to rotate around the support column 35, and make the spring buckle 39 alternately engage between multiple slots 40, so that the position of the second laser rangefinder 38 can be adjusted within a semi-circular arc range so that the laser of the second laser rangefinder 38 can illuminate the ground.

[0034] The system uses three tracks 42, and the traveling wheel 7 rolls inside the traveling groove 43. Since the multiple traveling grooves 43 are spliced ​​into a straight line, the traveling wheel 7 can only travel in a straight line when it rolls inside the traveling groove 43. The three tracks 42 are connected end to end by the snap-fit ​​of ...

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the thickness of concrete pouring for building safety, characterized in that, include: A support rod (1) is provided with a sliding block (2) movably sleeved on the outer circular wall of the support rod (1). A movable frame (6) is fixedly installed on the bottom surface of the support rod (1), and a PLC controller is fixedly installed on the top surface of the movable frame (6). A continuous detection component is set on one side of the sliding block (2) for continuous detection of the thickness during concrete pouring; the continuous detection component includes: a lightweight frame (3), the lightweight frame (3) is fixedly installed on one side of the sliding block (2), a first mounting frame (4) is provided inside the lightweight frame (3), a first laser rangefinder (5) is fixedly installed inside the first mounting frame (4), a movable frame (6) is fixedly installed on the bottom surface of the support rod (1), a walking wheel (7) is provided on both sides of the movable frame (6), an electric motor (8) is fixedly installed inside the movable frame (6), a connecting shaft (9) is fixedly installed on one side of the walking wheel (7), the connecting shaft (9) is movablely connected to the movable frame (6), the drive shaft of the electric motor (8) is fixedly installed to the connecting shaft (9), the electric motor (8) is electrically connected to the PLC controller, and the first laser rangefinder (5) is electrically connected to the PLC controller; The lightweight frame (3) is internally equipped with a displacement component for changing the detection position of the first laser rangefinder (5); The bottom surface of the lightweight frame (3) is provided with a pre-leveling component for the poured concrete. One side of the sliding block (2) is provided with a ground height detection component for assisting in the detection of concrete thickness.

2. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that, The displacement component includes: A limiting post (10) is fixedly installed inside the lightweight frame (3). A movable tube (11) is movably sleeved on the outer circular wall of the limiting post (10). A moving rod (12) is fixedly installed on the outer circular wall of the movable tube (11). Two fixed rods (13) are fixedly installed on the top surface of the lightweight frame (3). A fixed frame (14) is fixedly installed between the two fixed rods (13). A servo motor (15) is fixedly installed inside the fixed frame (14). A rotating platform (16) is provided on the bottom surface of the fixed frame (14). A central column (22) is fixedly installed on the top surface of the rotating platform (16). The drive shaft of the servo motor (15) is fixedly installed with the central column (22). The servo motor (15) and the... The PLC controller is electrically connected. A rotating rod (17) is movably sleeved inside the rotating table (16). A helical spring (18) is movably sleeved on the outer circular wall of the rotating rod (17). An L-shaped plate (19) is fixedly installed at one end of the rotating rod (17). The two ends of the helical spring (18) are fixedly installed to the L-shaped plate (19) and the rotating table (16) respectively. A moving block (20) is movably sleeved on the outer circular wall of the moving rod (12). A rotating column (21) is fixedly installed on the top surface of the moving block (20). The rotating column (21) is movably sleeved with the L-shaped plate (19). The first mounting bracket (4) is fixedly installed with the moving block (20). The servo motor (15) is electrically connected to the PLC controller.

3. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that, The pre-leveling component includes: Two limiting platforms (25) are fixedly installed on the bottom surface of the lightweight frame (3). Each limiting platform (25) has a limiting hole (27) on one side. Fixing plates (23) are fixedly installed on both sides of the lightweight frame (3). A stepper motor (24) is fixedly installed on one side of each fixing plate (23). A connecting arm (26) is provided between the fixing plate (23) and the lightweight frame (3). The drive shaft of the stepper motor (24) is fixedly installed to the connecting arm (26). The lightweight frame (3) and the... A translation plate (28) is provided between the fixed plates (23). A sliding hole (29) is provided on one side of the translation plate (28). A connecting block (30) is slidably connected inside the sliding hole (29). The connecting block (30) is slidably connected to the limiting hole (27). A rotating block (31) is fixedly installed on the side of the connecting block (30) close to the fixed plate (23). The connecting arm (26) is movably sleeved with the rotating block (31). A push plate (32) is fixedly installed on the side of the two translation plates (28) close to each other.

4. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that: Two mini electric hoists (33) are fixedly installed on the top surface of the support rod (1), and the ropes of the mini electric hoists (33) are fixedly installed with the lightweight frame (3).

5. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that, The ground height detection component includes: A gravity frame (34) is fixedly installed on one side of the sliding block (2). A support column (35) is fixedly installed inside the gravity frame (34). An adjusting sleeve (36) is movably sleeved on the outer circular wall of the support column (35). A second mounting frame (37) is fixedly installed on the outer circular wall of the adjusting sleeve (36). A second laser rangefinder (38) is fixedly installed inside the second mounting frame (37).

6. The concrete pouring thickness detection device for building safety according to claim 5, characterized in that: Two spring buckles (39) are fixedly installed on the outer circular wall of the support column (35), and several slots (40) are opened on the inner circular wall of the adjusting sleeve (36). The spring buckles (39) are movably engaged with the slots (40).

7. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that: Two balance columns (41) are fixedly installed on the bottom surface of the support rod (1).

8. The concrete pouring thickness detection device for building safety according to claim 1, characterized in that: The bottom surface of the mobile frame (6) is provided with several tracks (42). The top surface of the track (42) has two walking grooves (43). The walking grooves (43) are movably connected to the walking wheels (7). The bottom surface of the walking grooves (43) is fixedly installed with friction belts. Two limiting rods (45) and a snap-fit ​​post (44) are fixedly installed on one side of the track (42). Two docking grooves (47) and a snap-fit ​​groove (46) are provided on the other side of the track (42). The snap-fit ​​groove (46) is movably snapped with the snap-fit ​​post (44). The limiting rods (45) are movably snapped with the docking grooves (47). Several tracks (42) are spliced ​​end to end with the limiting rods (45) and the docking grooves (47) through the snap-fit ​​grooves (46) and the snap-fit ​​posts (44).

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