A real-time monitoring device for a precast beam reinforcing layer and a monitoring method thereof

Abstract

The present application relates to the technical field of steel bar protective layer, especially relates to a real-time monitoring device and method for the steel bar protective layer of a precast beam, which comprises a transmitting shell and a receiving shell, a transmission assembly for adjusting the monitoring position is arranged in the transmitting shell, the transmission assembly is fixedly connected with a monitoring assembly, the monitoring assembly is movably connected with the transmitting shell, the thickness of the steel bar protective layer is mainly detected by the electromagnetic induction method in the prior art, when the steel bar detector is used to measure the thickness of the steel bar protective layer in the concrete, the probe needs to be manually moved along the direction perpendicular to the length of the measured steel bar, and the tester needs to observe the screen of the instrument at the same time, long-time detection consumes a lot of physical strength, is easy to fatigue, and even leads to testing errors, and the detection is generally carried out after the steel bar protective layer is poured, so that the qualified steel bar protective layer cannot be ensured during pouring.

Description

Technical Field

[0001] This invention relates to the field of steel reinforcement protective layer technology, and more particularly to a real-time monitoring device and method for the steel reinforcement protective layer of precast beams. Background Technology

[0002] The concrete cover generally refers to the concrete cover. The concrete cover is used to protect the reinforcing steel bars in a building's concrete structure. Considering the durability of concrete from the perspectives of carbonation, depassivation, and steel corrosion, the thickness of the concrete cover is no longer calculated based on the outer edge of the longitudinal reinforcing bars, but rather on the outer edge of the outermost layer of reinforcing bars (including stirrups, structural bars, distribution bars, etc.).

[0003] Currently, concrete spacers are generally used to achieve the concrete cover for precast beams. After the entire steel cage is tied, it is hoisted and transported to a designated location for formwork closing and concrete pouring. At this time, the concrete spacers may be damaged. Meanwhile, smart beam yards generally use intelligent hydraulic formwork for formwork closing. During the formwork closing process, the concrete cover cannot be monitored in real time, resulting in the concrete cover not meeting all the requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a real-time monitoring device for the concrete cover of precast beam reinforcement, which solves the problem that the concrete cover cannot be monitored in real time during the formwork closure process, resulting in the concrete cover not meeting all the requirements; and to provide a real-time monitoring method for the concrete cover of precast beam reinforcement, which is used to monitor the reinforcement cage in the formwork.

[0005] This invention is achieved through the following technical solution:

[0006] A real-time monitoring device for the protective layer of reinforcing bars in precast beams includes a transmitting shell and a receiving shell. The transmitting shell houses a transmission component for adjusting the monitoring position. The transmission component is fixedly connected to a monitoring component, which in turn movably engages with the transmitting shell. It should be noted that in existing technologies, the thickness of the protective layer of reinforcing bars is primarily monitored using electromagnetic induction. When measuring the thickness of the protective layer in concrete using a reinforcing bar detector, the probe must be manually moved slowly along a direction perpendicular to the length of the reinforcing bar being measured. Simultaneously, the operator must continuously observe the instrument's screen. Prolonged testing is physically demanding, easily leading to fatigue and even testing errors. Furthermore, testing is generally conducted after the protective layer has been poured, making it impossible to guarantee the quality of the protective layer during the pouring process.

[0007] In view of the above, a real-time monitoring device for the concrete cover of precast beams is proposed. Specifically, the transmitting shell and the receiving shell cooperate to monitor the position of the steel reinforcement skeleton before concrete is poured in the closed formwork, so as to avoid the steel reinforcement skeleton from moving due to the breakage of concrete blocks, which would result in the concrete cover being unqualified.

[0008] Furthermore, the transmission assembly includes a rotating shaft. One end of the rotating shaft is fixedly connected to a first gear and meshes with a first rack. The other end of the rotating shaft is fixedly connected to a second gear and meshes with a second rack. The first gear internally meshes with a third gear. The third gear is fixedly connected to a connecting shaft. The connecting shaft movably passes through the launching housing and is fixedly connected to a first bevel gear. The first bevel gear meshes with a second bevel gear. The launching housing engages with the first rack and the second rack via a sliding groove. The meshing of the first bevel gear and the second bevel gear drives the third gear to rotate. The third gear internally meshes with the first gear, thereby driving the rotating shaft to rotate. This causes the first gear to mesh with the first rack and the second gear to rotate, resulting in linear motion of the first rack and the second rack, thereby adjusting the position of the monitoring component.

[0009] Furthermore, the monitoring component includes a movable rod, with a first rack and a second rack fixedly connected to its two ends respectively. The movable rod has a first sliding groove, a second sliding groove slidably connected to the first sliding groove, and a rotating component movably connected to the second sliding groove. The movable rod is moved by the racks, thereby adjusting the position of the laser rangefinder.

[0010] Furthermore, the rotating component includes a fixed disk, which is slidably connected to the second slide groove. The fixed disk is also movably connected to a rotating disk, which is fixedly connected to a laser rangefinder. The movable connection between the fixed disk and the rotating disk causes the rotating disk to rotate, thereby driving the laser rangefinder to rotate.

[0011] Furthermore, the emitting housing has an opening for the laser beam to pass through. The laser beam is emitted through the opening to monitor whether the steel reinforcement frame exceeds a predetermined distance.

[0012] Furthermore, the second bevel gear is fixedly connected to a rotary handle or a drive motor, and a protective cover is fitted at the meshing point of the first and second bevel gears. The protective cover is fixedly connected to the launch housing. The transmission assembly is driven by the rotary handle or the drive motor. The first and second bevel gears mesh inside the protective cover, and the protective layer prevents foreign objects from entering and affecting the transmission effect.

[0013] Furthermore, the receiving housing includes a display for displaying detection distance data; a WiFi module for receiving data detected by the laser rangefinder and transmitting it to the display; and a warning light for flashing when the detection data is less than a preset value.

[0014] A method for monitoring the concrete cover of precast beam reinforcement includes the following steps:

[0015] Step 1: Fix the transmitting housing and the receiving housing by fixing the transmitting housing and the receiving housing to both ends of the steel reinforcement frame of the beam;

[0016] Step 2: Set the thickness of the rebar protective layer. After Step 1 is installed correctly, start the transmission component to move the monitoring component.

[0017] Step 3, Monitoring: After setting in Step 2, start the laser rangefinder. The laser beam illuminates the receiving housing and displays the constant distance between the transmitting and receiving housings. When the steel frame blocks the laser, the distance will change, and the display terminal will alarm, indicating which rangefinder has changed the distance, and will provide feedback to the on-site processing personnel for adjustment.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1. The present invention uses a transmitting shell and a receiving shell. The transmitting shell is provided with a transmission component for adjusting the monitoring position. The transmission component is fixedly connected to the monitoring component. The monitoring component is movably connected to the transmitting shell. Specifically, the transmitting shell and the receiving shell cooperate to monitor the position of the steel reinforcement skeleton in the closed formwork, so as to avoid the steel reinforcement protective layer being unqualified due to the movement of the steel reinforcement skeleton caused by the breakage of concrete blocks.

[0020] 2. The present invention includes a transmission assembly comprising a rotating shaft. One end of the rotating shaft is fixedly connected to a first gear and meshes with a first rack. The other end of the rotating shaft is fixedly connected to a second gear and meshes with a second rack. A third gear meshes with the first gear. The third gear is fixedly connected to a connecting shaft. The connecting shaft movably passes through the launch housing and is fixedly connected to a first bevel gear. The first bevel gear meshes with a second bevel gear. The meshing of the first and second bevel gears drives the third gear to rotate. The third gear meshes with the first gear, thereby driving the rotating shaft to rotate. This causes the first gear to mesh with the first rack, and the second gear to mesh with the second rack, thereby adjusting the position of the monitoring component.

[0021] 3. The present invention includes a display screen in the receiving housing for displaying detection distance data; a WiFi module for receiving data detected by the laser rangefinder and transmitting it to the display screen; and a warning light for emitting a flashing light when the detection data is less than a preset value. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a top view of the present invention;

[0025] Figure 3 This is a cross-sectional view of the present invention;

[0026] Figure 4 This is a structural diagram of the monitoring component of the present invention;

[0027] Figure 5 This is a structural diagram of the receiving housing;

[0028] Figure 6 This is a flowchart illustrating the operation of the monitoring device of the present invention.

[0029] The reference numerals in the attached figures represent: 1-transmitting housing; 2-receiving housing; 3-transmission assembly; 301-drive motor; 302-first gear; 303-first rack; 304-rotating shaft; 305-second gear; 306-second rack; 307-connecting shaft; 308-first bevel gear; 309-second bevel gear; 310-third gear; 4-monitoring assembly; 401-moving rod; 402-first slide; 403-second slide; 404-rotating disk; 405-fixed disk; 406-laser rangefinder; 407-rotating component; 5-slide; 6-opening; 7-warning light; 8-display; 9-protective cover. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0031] Example 1

[0032] Please refer to the attached document as well. Figures 1 to 6 A real-time monitoring device for the protective layer of precast beam reinforcement includes a transmitting shell 1 and a receiving shell 2. The transmitting shell 1 houses a transmission component 3 for adjusting the monitoring position. The transmission component 3 is fixedly connected to a monitoring component 4, which movably engages with the transmitting shell 1. It should be noted that in existing technologies, the thickness monitoring of the protective layer of reinforcement mainly relies on electromagnetic induction. When measuring the thickness of the protective layer of reinforcement in concrete using a reinforcement detector, the probe must be manually moved slowly along the direction perpendicular to the length of the reinforcement being measured. Simultaneously, the tester must continuously observe the instrument screen. Prolonged testing is physically demanding, easily leading to fatigue and even testing errors. Furthermore, testing is generally conducted after the protective layer has been poured, making it impossible to guarantee the quality of the protective layer during the pouring process.

[0033] In view of the above, a real-time monitoring device for the concrete cover of precast beam reinforcement is proposed. Specifically, the transmitting shell 1 and the receiving shell 2 cooperate to monitor the position of the reinforcement skeleton in the closed formwork, so as to avoid the reinforcement cover being unqualified due to the movement of the reinforcement skeleton caused by the breakage of concrete blocks.

[0034] It should be noted that the transmitter housing 1 and receiver housing 2 are connected by a transmission component 3 for adjusting the monitoring position. The transmission component 3 is fixedly connected to the monitoring component 4, and the monitoring component 4 is movably connected to the transmitter housing 1. Specifically, the transmitter housing 1 and receiver housing 2 are connected to monitor the position of the steel reinforcement skeleton in the closed formwork to prevent the steel reinforcement protective layer from being substandard due to the movement of the steel reinforcement skeleton before the concrete is poured.

[0035] The transmission assembly 3 includes a drive motor 301, which is fixedly connected to the launch housing 1. The output end of the drive motor 301 is fixedly connected to a rotating shaft 304, which movably passes through the launch housing 1. One end of the rotating shaft 304 is fixedly connected to a first gear 302, which meshes with a first rack 303. The other end of the rotating shaft 304 is fixedly connected to a second gear 305, which meshes with a second rack 306. Preferably, the drive motor 301 rotates to drive the rotating shaft 304 to rotate. The first gear 302 and the second gear 305 are welded to both ends of the rotating shaft 304, respectively. The first gear 302 meshes with the first rack 303, and the second gear 305 meshes with the end rack. The end of the rack is fixedly connected to the monitoring component 4. The rotating shaft 304 drives the first rack 303 and the second rack 306 to move, thereby adjusting the monitoring component 4. It should be noted that there are two first racks 303 arranged horizontally and symmetrically, and there are two second racks 306 arranged symmetrically.

[0036] The transmitting housing 1 is engaged with the first rack 303 and the second rack 306 via a sliding groove 5. Preferably, the transmitting housing 1 has a sliding groove 5 inside, which is slidably engaged with the rack. Through the engagement of the sliding groove 5, the first rack 303 and the second rack 306 can move linearly, thereby driving the monitoring component 4 to move.

[0037] The monitoring component 4 includes a movable rod 401, with a first rack 303 and a second rack 306 fixedly connected to its two ends respectively. The movable rod 401 is equipped with a laser rangefinder 406 for distance detection. Preferably, the movable rod 401 is moved by the racks to adjust the position of the laser rangefinder 406. Once the position of the laser rangefinder 406 is fixed, it emits rays to monitor the concrete cover of the reinforcing steel. There are two movable rods 401, which are symmetrically arranged in frontal projection. They simultaneously monitor both sides of the reinforcing steel skeleton to prevent the reinforcing steel skeleton from shifting in the closed formwork environment before concrete pouring, which could lead to an unqualified concrete cover.

[0038] The transmitting housing 1 has an opening 6 for the laser beam to pass through. Preferably, the laser beam is emitted through the opening 6 and directed onto the receiving housing 2 to monitor whether the steel reinforcement frame exceeds a set distance.

[0039] The receiving housing 2 includes a display 8 for displaying detection distance data; a WiFi module for receiving data detected by the laser rangefinder 406 and transmitting it to the display 8; and a warning light 7 for flashing when the detection data is less than a preset value.

[0040] Example 2

[0041] Please refer to this as well. Figures 1 to 6 This embodiment improves upon embodiment 1 by modifying the transmission assembly 3. The transmission assembly 3 includes a rotating shaft 304. One end of the rotating shaft 304 is fixedly connected to a first gear 302 and meshes with a first rack 303. The other end of the rotating shaft 304 is fixedly connected to a second gear 305 and meshes with a second rack 306. A third gear 310 meshes with the first gear 302. The third gear 310 is fixedly connected to a connecting shaft 307. The connecting shaft 307 movably passes through the launch housing 1 and is fixedly connected to a first bevel gear 308. The first bevel gear 308 meshes with a second bevel gear 309. The second bevel gear 309 is fixedly connected to a rotating handle or a drive motor 301. A protective cover 9 is fitted at the meshing point of the first bevel gear 308 and the second bevel gear 309. The protective cover 9 is fixedly connected to the launch housing 1. The monitoring component 4 includes a movable rod 401, with a first rack 303 and a second rack 306 fixedly connected to its two ends respectively. The movable rod 401 has a first sliding groove 402, and a second sliding groove 403 is slidably connected to the first sliding groove 402. A rotating component 407 is movably connected to the second sliding groove 403. The rotating component 407 includes a fixed disk 405, which is slidably connected to the second sliding groove 403. A rotating disk 404 is also movably connected to the fixed disk 405, and a laser rangefinder 406 is fixedly connected to the rotating disk 404.

[0042] It should be noted that the first gear 302 is a gear with teeth on both the inner and outer sides. The inner teeth of the first gear 302 are smaller than the outer teeth. The first gear 302 meshes with the third gear 310. The third gear 310 is fixedly connected to the connecting shaft 307. The connecting shaft 307 movably passes through the launch housing 1 and is fixedly connected to the first bevel gear 308. The first bevel gear 308 meshes with the second bevel gear 309. The second bevel gear 309 is fixedly connected to a rotating handle or a drive connection. The protective cover 9 is fitted over the first bevel gear 308 and the second bevel gear 309. The second bevel gear 309 is rotated by the drive motor 301 or the rotating handle. The second bevel gear 309 drives the first bevel gear 308 to rotate. The first bevel gear 308 drives the third gear 310 to rotate via the connecting shaft 307. The third gear 310 meshes with the first gear 302, thereby moving the first rack 303 and thus the monitoring component 4. The internal teeth of the first gear 302 are smaller than the external teeth, thus reducing the displacement of the rack and achieving precise control of the displacement distance of the monitoring component 4. The transmitter housing 1 is provided with a range line for setting and observing the position of the monitoring component 4.

[0043] Furthermore, the monitoring component 4 includes a movable rod 401, with the first rack 303 and the second rack 306 fixedly connected to its two ends respectively. The movable rod 401 has a first sliding groove 402, and the first sliding groove 402 is slidably connected to a second sliding groove 403. The second sliding groove 403 is movably connected to a rotating component 407, which includes a fixed disk 405. The fixed disk 405 is slidably connected to the second sliding groove 403, and the fixed disk 405 is also movably connected to a rotating disk 404. The rotating disk 404 is fixedly connected to a laser rangefinder 406. The monitoring component 4 can move up and down along the moving rod 401 by sliding the first slide groove 402 and the second slide groove 403. The rotating component 407 is slidably connected to the second slide groove 403, allowing the rotating component 407 to move back and forth along the second slide groove 403. The rotating component 407 includes a fixed disk 405, which is slidably connected to the second slide groove 403. The fixed disk 405 is movably connected to the rotating disk 404. The rotation of the rotating disk 404 and the fixed disk 405 drives the laser rangefinder 406 to rotate. The fixed disk 405 and the rotating disk 404 are driven to rotate by the motor. The rotation increases the range of laser detection. Compared with the prior art, the detection of several points of the rebar protective layer is generally carried out by selecting three different points. During the detection, professional equipment is used to detect the three points separately, and then the data obtained from the detection are compared. The detection requires workers to use hand tools. The detection is physically demanding and easy to cause fatigue and even test errors. The monitoring component 4 drives the laser detector to swing through the rotating part 407, forming a fan-shaped detection area, thereby achieving a larger detection range and ensuring the qualification of the steel reinforcement protective layer. The laser detector moves through the sliding of the first slide groove 402 and the second slide groove 403 to achieve real-time monitoring. The laser detector moves forward and backward through the sliding of the second slide groove 403 and the rotating part 407, reducing the obstruction of other foreign objects to the detection of the laser rangefinder 406. The laser is irradiated onto the receiving housing 2 through the opening 6. When the steel reinforcement skeleton shifts and blocks the radiation, the receiving housing 2 cannot receive the laser signal normally. At this time, the warning light 7 starts to alarm.

[0044] like Figure 6 As shown, a method for monitoring the protective layer of reinforcing steel bars in precast beams includes the following steps:

[0045] Step 1: Fix the transmitting housing 1 and the receiving housing 2, fixing the transmitting housing 1 and the receiving housing 2 to both ends of the steel reinforcement frame of the beam;

[0046] Step 2: Set the thickness of the steel reinforcement protective layer. After Step 1 is installed correctly, start the transmission component 3, which will drive the monitoring component 4 to move.

[0047] Step 3, monitoring: After setting in Step 2, adjust the swing angle of the monitoring component 4 and start the laser rangefinder 406. The laser shines on the receiving housing 2. When the steel frame blocks the laser, the receiving housing 2 cannot receive the laser signal. The display terminal will then alarm and indicate the change in laser distance, and provide feedback to the on-site processing personnel for adjustment.

[0048] Example 3

[0049] This embodiment adds a buffer component to Embodiment 2. The buffer component is movably connected to the rotating disk 404. The buffer component reduces the vibration that occurs when the rotating disk rotates, thereby affecting the detection data. The buffer component includes a buffer rod and a buffer spring. The buffer spring is movably connected to the buffer rod. One end of the buffer rod is fixedly connected to the rotating disk 404, and the other end of the buffer rod is slidably connected to the fixed disk 405. This allows the buffer spring to abut against both the rotating disk 404 and the fixed disk 405, reducing vibration during rotation and thus ensuring the accuracy of monitoring.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A real-time monitoring device for precast beam steel reinforcement cover, characterized in that: It includes a transmitting housing (1) and a receiving housing (2). The transmitting housing (1) is provided with a transmission component (3) for moving the monitoring position. The transmission component (3) is fixedly connected to the monitoring component (4). The monitoring component (4) is movably engaged with the transmitting housing (1). The transmission assembly (3) includes a rotating shaft (304), one end of which is fixedly connected to a first gear (302) and meshes with a first rack (303), and the other end of which is fixedly connected to a second gear (305) and meshes with a second rack (306). The first gear (302) meshes with a third gear (310), and the third gear (310) is fixedly connected to a connecting shaft (307). The connecting shaft (307) movably passes through the launch housing (1) and is fixedly connected to a first bevel gear (308). The first bevel gear (308) meshes with a second bevel gear (309). The launch housing (1) cooperates with the first rack (303) and the second rack (306) through a sliding groove (5). The monitoring component (4) includes a movable rod (401), with the first rack (303) and the second rack (306) fixedly connected to both ends of the movable rod (401). The movable rod (401) has a first groove (402), and the first groove (402) is slidably connected to a second groove (403). The second groove (403) is movably connected to a rotating component (407).

2. The real-time monitoring device for the protective layer of precast beam reinforcement according to claim 1, characterized in that: The rotating component (407) includes a fixed disk (405), which is slidably connected to the second slide groove (403). The fixed disk (405) is also movably connected to a rotating disk (404), and the rotating disk (404) is fixedly connected to a laser rangefinder (406).

3. The real-time monitoring device for the protective layer of precast beam reinforcement according to claim 1, characterized in that: The transmitting housing (1) has an opening (6) for the laser beam to pass through.

4. The real-time monitoring device for the protective layer of precast beam reinforcement according to claim 1, characterized in that: The second bevel gear (309) is fixedly connected to a rotating handle or a drive motor (301). A protective cover (9) is fitted at the meshing point between the first bevel gear (308) and the second bevel gear (309). The protective cover (9) is fixedly connected to the launch housing (1).

5. The real-time monitoring device for the protective layer of precast beam reinforcement according to claim 1, characterized in that: The receiving housing (2) includes a display (8) for displaying detection distance data; The WiFi module is used to receive data detected by the laser rangefinder (406) and transmit it to the display (8); the warning light (7) is used to emit a flashing light when the detected data is less than a preset value.

6. A method for monitoring the protective layer of reinforcing steel bars in precast beams, characterized in that: A real-time monitoring device for the protective layer of precast beam reinforcement according to any one of claims 1-5, comprising the following steps: Step 1, fix the transmitting housing (1) and the receiving housing (2) to both ends of the steel reinforcement frame of the beam; Step 2, set the thickness of the steel reinforcement protective layer. After step 1 is installed correctly, start the transmission component (3) to drive the monitoring component (4) to move. Step 3, monitoring. After setting in Step 2, adjust the swing angle of the monitoring component (4), start the laser rangefinder (406), and the laser shines on the receiving housing (2). When the steel frame blocks the laser, the receiving housing (2) cannot receive the laser signal, and the display terminal will alarm and indicate the change in laser distance, and provide feedback to the on-site processing personnel for adjustment.

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