Fabricated house building connection node structure monitoring device and method

Abstract

The invention belongs to the technical field of building monitoring, and particularly relates to a fabricated house building connection node structure monitoring device and method, and the device comprises a protection box, a monitoring station and a mounting seat. A window is formed in one side of the protection box; a motor and a fixing plate are fixedly connected to the interior of the protection box; a groove is formed in the lower side of the monitoring table; a camera is arranged in the monitoring station; a screw rod is rotationally connected between the mounting seat and the fixing plate; and a connecting rod is fixedly connected between the mounting seat and the fixing plate. Under the normal condition, the monitoring station is stored in the protection box, so that the monitoring station is protected, a camera is prevented from being polluted and damaged, and when monitoring work needs to be carried out, a motor drives a screw rod to rotate, and the monitoring station is controlled to slowly move above a floor slab joint along the screw rod and a connecting rod; therefore, the camera is used for monitoring the health condition of the whole joint, the monitoring range of the joint is enlarged, and the problems of deformation, dislocation, water seepage and the like of the joint are prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of building monitoring, and in particular to a device and method for monitoring the connection node structure of an assembled building. Background Art

[0002] Prefabricated buildings are a type of construction method that uses prefabricated components produced in factories and assembled on construction sites. They mainly include prefabricated concrete structures, steel structures, modern wooden structures, etc. Compared with traditional buildings, they have the advantages of short construction period, controllable quality, low labor intensity, reduced material waste, less environmental impact, and higher safety. Therefore, they will become one of the main directions of future construction development.

[0003] For various problems that are prone to occur in prefabricated buildings, many targeted monitoring devices have been developed at home and abroad. For example, the patent with application number 202310585727.X discloses a method and system for monitoring the structural health of the connection nodes of prefabricated housing buildings, including: establishing a CAE simulation model of the prefabricated building to be monitored, and performing simulation calculations to obtain the deformation and stress of the prefabricated building structure to be monitored; determining the structural connection nodes that need to be monitored for structural health according to the deformation and stress of the prefabricated building structure to be monitored, and deploying corresponding monitoring sensors; calculating the fatigue life of the connection node structure according to the monitoring data detected by the monitoring sensor, thereby evaluating the durability of the connection node structure of the prefabricated housing building; establishing a BIM model of the prefabricated housing building to be monitored, and integrating the simulation calculation results, monitoring data, and durability evaluation data into the BIM model. Provide technical support for housing building maintenance, improve the durability of the prefabricated housing building structure, and thus improve the living quality of prefabricated housing buildings.

[0004] However, the above technology often has the following defects: the monitoring device of the connection node structure of the prefabricated house building in the prior art usually adopts a fixed monitoring structure when monitoring the joints between the floor slabs, but the floor slabs and their joints are usually long, and the existing monitoring device is difficult to monitor and evaluate the health status of the entire joint, and it is difficult to detect and repair the failure of the joint in time, which affects the use effect of the prefabricated house.

[0005] To this end, the present invention provides a device and method for monitoring the connection node structure of an assembled building. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the present invention provides a monitoring device for the connection node structure of a prefabricated building, comprising a protection box, a monitoring platform and a mounting seat;

[0008] A window is provided on one side of the protection box close to the mounting seat; a motor and a fixing plate are fixedly connected inside the protection box;

[0009] A groove is provided at the lower side of the monitoring platform; a camera is arranged inside the monitoring platform, and the camera head of the camera extends into the groove;

[0010] A screw is rotatably connected between the mounting seat and the fixed plate, and the screw passes through the monitoring platform and is connected thereto through a screw nut pair; one end of the screw is connected to the output shaft of the motor; a connecting rod is fixedly connected between the mounting seat and the fixed plate, and the connecting rod passes through the monitoring platform and is slidably connected thereto.

[0011] Preferably, a pressure plate is fixedly connected to one side of the monitoring platform close to the mounting seat; and a sealing strip is fixedly connected to the surface of the pressure plate.

[0012] Preferably, a water storage box and a spray chamber are provided inside the protection box; an elastic pad is fixedly connected to the inside of the spray chamber; an elastic member 1 is fixedly connected between the elastic pad and the spray chamber; a water pipe is connected between the spray chamber above the elastic pad and the bottom of the water storage box; a nozzle is connected to the top of the spray chamber; a hollow elastic block is fixedly connected to the side of the fixed plate close to the monitoring station; an air pipe is connected between the spray chamber below the elastic pad and the elastic block.

[0013] Preferably, a one-way valve is provided inside the water pipe; and a pressure relief valve is provided inside the nozzle.

[0014] Preferably, a sliding bar is slidably connected inside the groove; two elastic parts are fixedly connected between the sliding bar and the groove; a flexible part is fixedly connected to the upper side of the sliding bar; a guide bar is provided on the side of the monitoring platform away from the pressure plate; an elastic inclined claw is fixedly connected to the lower side of the guide bar; a guide rod is fixedly connected between the guide bar and the sliding bar, and the guide rod is slidably connected to the monitoring platform.

[0015] Preferably, a collecting groove is provided on one side of the protection box; a connecting groove is connected between the collecting groove and the top of the water storage box; and a water absorbing member is fixedly connected inside the collecting groove.

[0016] Preferably, a medicine storage box is arranged on the upper side of the water storage box, and the water storage box and the medicine storage box are separated by a partition; a guide hole is opened inside the partition; and the guide hole is controlled by a switch assembly.

[0017] Preferably, the switch assembly includes a slide groove opened inside the partition; one end of the slide groove is connected to the guide hole, and the other end is connected to the collecting groove; a grid plate is fixedly connected to the position inside the slide groove near the collecting groove; a slider is slidably connected to the inside of the slide groove; a spring is fixedly connected between the slider and the slide groove; a telescopic block is fixedly connected between the slider and the grid plate; a water guiding member is connected between the telescopic block and the water absorbing member; a side of the slider close to the guide hole is fixedly connected to a blocking upper piece and a blocking lower piece; one end of the blocking lower piece is slidably connected to the inside of the partition; a connecting port is opened on the surface of the blocking lower piece.

[0018] A method for monitoring the structure of connection nodes of prefabricated house buildings, the method adopts the above-mentioned monitoring device for the structure of connection nodes of prefabricated house buildings, and comprises the following steps:

[0019] S1: The motor drives the screw to rotate, controls the monitoring platform to move slowly along the screw and connecting rod above the floor joint, and uses the camera to monitor the health of the entire joint;

[0020] S2: Place the monitoring station inside the protective box, fit the pressure plate to the window surface, and press the sealing strip tightly to seal the window to prevent external debris from entering the protective box;

[0021] S3: When the monitoring platform enters the protection box, the elastic block is squeezed to squeeze the air inside the elastic block into the injection cavity under the elastic pad, causing the elastic pad to deform upward, and the water above the elastic pad is squeezed upward through the nozzle to clean the lens;

[0022] S4: When the monitoring platform moves out of the protection box, the elastic member drives the elastic pad to recover downward, and the water in the water storage box enters the injection cavity above the elastic pad through the water pipe to replenish the cleaning water;

[0023] S5: When the monitoring platform moves outward and passes through the window, the inclined claw is blocked by the bottom of the window, and the guide bar pulls the slide bar to slide inside the groove through the guide rod, and uses the flexible part to wipe the lens surface of the camera to further remove dust, dirt and water stains left by cleaning.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention discloses a device and method for monitoring the structure of connection nodes of prefabricated house buildings. Under normal circumstances, the monitoring platform is stored in a protective box to protect it and prevent the camera from being contaminated and damaged. When monitoring work is required, the motor drives the screw to rotate, controls the monitoring platform to move outward through the window, and slowly moves along the screw and the connecting rod above the floor joint, so that the camera is used to monitor the health of the entire joint, increase the monitoring range of the joint, prevent deformation, dislocation, water seepage and other problems in the joint, and extend the service life of the prefabricated house building.

[0026] 2. The present invention describes a device and method for monitoring the structure of connection nodes of prefabricated building buildings. When the monitoring platform enters the protection box, it will squeeze the elastic block and squeeze the air inside the elastic block into the injection chamber below the elastic pad through the air pipe, causing the elastic pad to deform upward, and then the water above the elastic pad is squeezed and sprayed upward through the nozzle and sprayed on the lens surface of the camera, thereby flushing the lens and removing dust or other debris on its surface to prevent the lens from being blocked, thereby improving its subsequent use effect. When the monitoring platform leaves the protection box, the elastic member drives the elastic pad to recover downward. At this time, the water inside the water storage box can enter the injection chamber above the elastic pad through the water pipe to replenish the cleaning water for the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 is a stereogram of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the protection box in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the monitoring station in the present invention;

[0031] Figure 4 is a cross-sectional view of the protective box of the present invention;

[0032] Figure 5 yes Figure 4 A partial enlarged view of the middle part;

[0033] Figure 6 yes Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 7 It is a schematic flow chart of the method of the present invention.

[0035] In the figure: protection box 1, monitoring platform 2, mounting base 3, window 4, motor 5, fixing plate 6, groove 7, camera 8, screw 9, connecting rod 10, pressing plate 11, sealing strip 12, water storage box 13, injection chamber 14, elastic pad 15, elastic member 1 16, water pipe 17, nozzle 18, elastic block 19, air pipe 20, slide bar 21, elastic member 2 22, flexible member 23, guide bar 24, guide rod 25, inclined claw 26, collecting groove 27, connecting groove 28, water absorbing member 29, medicine storage box 30, partition 31, guide hole 32, slide groove 33, grid plate 34, slider 35, spring 36, telescopic block 37, water guiding member 38, upper sealing piece 39, lower sealing piece 40, connecting port 41. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figures 1 to 6 As shown, a prefabricated building connection node structure monitoring device according to the present invention comprises a protection box 1, a monitoring platform 2 and a mounting seat 3, wherein the protection box 1 and the mounting seat 3 are fixed at both ends of the floor joint by using angle brackets and bolts;

[0038] A window 4 is provided on one side of the protection box 1 close to the mounting seat 3; a motor 5 and a fixing plate 6 are fixedly connected inside the protection box 1;

[0039] A groove 7 is provided at the lower side of the monitoring platform 2; a camera 8 is provided inside the monitoring platform 2, and the camera head of the camera 8 extends into the groove 7;

[0040] A screw rod 9 is rotatably connected between the mounting seat 3 and the fixing plate 6, and the screw rod 9 passes through the monitoring platform 2 and is connected thereto via a screw nut pair; one end of the screw rod 9 is connected to the output shaft of the motor 5; a connecting rod 10 is fixedly connected between the mounting seat 3 and the fixing plate 6, and the connecting rod 10 passes through the monitoring platform 2 and is slidably connected thereto.

[0041] The structural monitoring device for connection nodes of prefabricated house buildings in the prior art usually adopts a fixed monitoring structure when monitoring the joints between floor slabs. However, the floor slabs and their joints are usually long, and the existing monitoring device is difficult to monitor and evaluate the health status of the entire joint. As a result, it is difficult to detect and repair failure of the joints in time, which affects the use effect of the prefabricated house.

[0042] When in use, the present invention needs to be installed in advance at the joints between floor slabs, and then the health status of the floor slab joints is regularly monitored and evaluated. Under normal circumstances, the monitoring station 2 is stored in the protective box 1 to protect it and prevent the camera 8 from being contaminated and damaged. When monitoring work is required, the motor 5 drives the screw 9 to rotate, controls the monitoring station 2 to move outward through the window 4, and slowly moves along the screw 9 and the connecting rod 10 above the floor slab joints, so that the camera is used to monitor the health status of the entire joint, increase the monitoring range of the joint, prevent deformation, dislocation, water seepage and other problems in the joint, and extend the service life of the prefabricated house building.

[0043] The present invention can control the movement of the monitoring platform 2 by remote control, and use the camera 8 to manually identify the health status of the floor joints. A processing module and a networking module can also be set inside the protection box 1. The camera 8 is preferably a machine vision camera 8, and the motor 5 is preferably a servo motor 5. Through program setting, the monitoring platform 2 periodically leaves the protection box 1 and moves above the joints. The machine vision camera 8 is used to automatically identify the health status of the floor joints, and then the processing module processes, analyzes, and evaluates them. The monitoring data and results are remotely transmitted to the monitoring site through the networking module, thereby realizing the full-process automated monitoring function and improving the practicality and use effect of the device.

[0044] The health assessment items of floor joints include but are not limited to: gap width, gap depth, filler distribution, floor surface weathering, etc.

[0045] The present invention is not only suitable for monitoring floor joints, but can also be used for monitoring other structures, such as roof dust and garbage monitoring, wall panel joint monitoring, wall damage monitoring, beam and column corrosion monitoring, etc.

[0046] As a preferred embodiment of the present invention, a pressure plate 11 is fixedly connected to one side of the monitoring platform 2 close to the mounting seat 3, and the size of the pressure plate 11 is larger than the window 4; a sealing strip 12 is fixedly connected to the surface of the pressure plate 11. By providing the pressure plate 11 and the sealing strip 12, when the monitoring platform 2 is stored in the protection box 1, the pressure plate 11 fits exactly on the surface of the window 4 and presses the sealing strip 12 tightly, thereby sealing the window 4, preventing dust, garbage and other debris from the outside from entering the protection box 1 through the window 4 and causing pollution to various components.

[0047] As a preferred embodiment of the present invention, a water storage box 13 and an injection chamber 14 are provided inside the protective box 1, and water is stored in the water storage box 13; an elastic pad 15 is fixedly connected to the inside of the injection chamber 14; an elastic member 16 is fixedly connected between the elastic pad 15 and the injection chamber 14; a water pipe 17 is connected between the injection chamber 14 above the elastic pad 15 and the bottom of the water storage box 13; a nozzle 18 is connected to the top of the injection chamber 14; a hollow elastic block 19 is fixedly connected to the side of the fixed plate 6 close to the monitoring station 2; an air pipe 20 is connected between the injection chamber 14 below the elastic pad 15 and the elastic block 19. When the monitoring station 2 enters the protection box 1, it will squeeze the elastic block 19 and squeeze the air inside the elastic block 19 into the injection chamber 14 below the elastic pad 15 through the air pipe 20, causing the elastic pad 15 to deform upward, and then the water above the elastic pad 15 is squeezed and sprayed upward through the nozzle 18, spraying on the lens surface of the camera 8, thereby flushing the lens, removing dust or other debris on its surface, preventing the lens from being blocked, and improving its subsequent use effect. When the monitoring station 2 leaves the protection box 1, the elastic member 16 drives the elastic pad 15 to recover downward. At this time, the water in the water storage box 13 can enter the injection chamber 14 above the elastic pad 15 through the water pipe 17 to replenish the cleaning water for the next use.

[0048] A one-way valve is provided inside the water pipe 17, and a pressure relief valve is provided inside the nozzle 18. By providing the one-way valve and the pressure relief valve, when the elastic pad 15 is deformed upward, the water inside the injection chamber 14 will not flow back through the water pipe 17, and the nozzle 18 will not open until the pressure of the injection chamber 14 reaches a certain threshold, thereby ensuring the water spraying pressure of the nozzle 18 and improving the cleaning efficiency of the camera 8. When the elastic pad 15 is restored downward, the one-way valve can be automatically opened under the action of the water pressure and height difference inside the water storage box 13, and water can be smoothly replenished into the injection chamber 14.

[0049] As a preferred embodiment of the present invention, a slide bar 21 is slidably connected inside the groove 7; an elastic member 22 is fixedly connected between the slide bar 21 and the groove 7; a flexible member 23 is fixedly connected to the upper side of the slide bar 21; a guide bar 24 is provided on the side of the monitoring platform 2 away from the pressure plate 11; an elastic inclined claw 26 is fixedly connected to the lower side of the guide bar 24; a guide rod 25 is fixedly connected between the guide bar 24 and the slide bar 21, and the guide rod 25 is slidably connected to the monitoring platform 2. When the monitoring platform 2 leaves the protective box 1, the inclined claw 26 is blocked by the bottom of the window 4, and as the monitoring platform 2 moves, the guide bar 24 pulls the slide bar 21 to slide inside the groove 7 through the guide rod 25, and uses the flexible member 23 to wipe the lens surface of the camera 8, thereby removing the dust, dirt and water stains left by cleaning on its surface, further improving the cleanliness of the lens and ensuring the smooth progress of the monitoring work. When the slide bar 21 moves to the other side of the groove 7, the inclined claw 26 is squeezed and deformed by the bottom of the window 4 and passes over the window 4, and the elastic member 22 pulls the slide bar 21 to reset.

[0050] As a preferred embodiment of the present invention, a collecting groove 27 is provided on one side of the protection box 1; a connecting groove 28 is connected between the collecting groove 27 and the top of the water storage box 13; a water absorbing member 29 is fixedly connected inside the collecting groove 27, and the material of the water absorbing member 29 can be sponge, absorbent cloth, foaming material, etc. By providing the collecting groove 27, when it rains, rainwater can flow into the water storage box 13 through the collecting groove 27 and the connecting groove 28, thereby replenishing the cleaning water inside the water storage box 13, so that the cleaning work can be carried out stably for a long time, and the porous structure of the water absorbing member 29 is used to absorb impurities in the rainwater, thereby improving the purity of the rainwater, ensuring its good cleaning effect on the camera 8, and preventing the camera 8 from causing secondary pollution.

[0051] As a preferred embodiment of the present invention, a medicine storage box 30 is provided on the upper side of the water storage box 13, and the water storage box 13 and the medicine storage box 30 are separated by a partition 31. The medicine storage box 30 stores alkaline powders, such as lime, sodium hydroxide, calcium hydroxide, etc.; a guide hole 32 is provided inside the partition 31; the guide hole 32 is controlled by a switch assembly. Since rainwater is usually acidic, with a pH value of about 5.6, after collecting rainwater, the guide hole 32 is opened by the switch assembly, and the alkaline powder inside the medicine storage box 30 enters the water storage box 13 through the guide hole 32, neutralizes the collected rainwater, and makes the cleaning water tend to be neutral, preventing the camera 8 from being damaged by rainwater corrosion.

[0052] The switch assembly includes a slide groove 33 opened inside the partition 31; one end of the slide groove 33 is connected to the guide hole 32, and the other end is connected to the collecting groove 27; a grid plate 34 is fixedly connected to the position of the slide groove 33 near the collecting groove 27; a slider 35 is slidably connected inside the slide groove 33; a spring 36 is fixedly connected between the slider 35 and the slide groove 33; a telescopic block 37 is fixedly connected between the slider 35 and the grid plate 34, and the telescopic block 37 is made of water-absorbing and expanding material, such as expanding rubber, polymer hydrogel, etc.; a water guide 38 is connected between the telescopic block 37 and the water-absorbing member 29, and the material of the water guide 38 can be sponge, absorbent cloth, cotton, etc.; a blocking upper piece 39 and a blocking lower piece 40 are fixedly connected to the side of the slider 35 near the guide hole 32, and the length of the blocking lower piece 40 is greater than the blocking upper piece 39; one end of the blocking lower piece 40 is slidably connected to the inside of the partition 31; a connection port 41 is opened on the surface of the blocking lower piece 40. Under normal circumstances, the top of the guide hole 32 is open, and the bottom of the guide hole 32 is closed by the blocking lower piece 40, so that the alkaline powder inside the medicine storage box 30 can enter the chute 33 through the top of the guide hole 32. When it rains, the water absorbing member 29 is soaked, and the water is guided to the telescopic block 37 through the water guiding member 38, so that the telescopic block 37 absorbs water and expands and elongates, and pushes the slider 35 to move inside the chute 33, and then the blocking upper piece 39 closes the top of the guide hole 32, and the connecting port 41 of the blocking lower piece 40 is aligned with the bottom of the guide hole 32. At this time, the alkaline powder inside the chute 33 can pass through The bottom of the guide hole 32 automatically falls into the water storage box 13. After the rain stops and the water absorbing member 29 and the telescopic block 37 are gradually dried, the telescopic block 37 shrinks and recovers, and the spring 36 drives the slider 35, the upper blocking piece 39 and the lower blocking piece 40 to reset. At this time, the top of the guide hole 32 is reopened, and the bottom of the guide hole 32 is closed by the lower blocking piece 40, so that the alkaline powder can enter the chute 33 again. This structure can realize the addition of alkaline powder to the water storage box 13 once every time it rains, and the amount of addition can be accurately controlled, thereby improving the neutralization effect of rainwater and saving the use of alkaline powder.

[0053] like Figure 7 As shown, a method for monitoring the connection node structure of a prefabricated building according to the present invention adopts the above-mentioned monitoring device for the connection node structure of a prefabricated building, and comprises the following steps:

[0054] S1: The motor 5 drives the screw 9 to rotate, controls the monitoring platform 2 to move slowly along the screw 9 and the connecting rod 10 above the floor joint, and uses the camera to monitor the health status of the entire joint;

[0055] S2: The monitoring station 2 is stored in the protection box 1, the pressing plate 11 is attached to the surface of the window 4, and the sealing strip 12 is pressed tightly, so as to seal the window 4 to prevent external debris from entering the protection box 1;

[0056] S3: When the monitoring platform 2 enters the protection box 1, it squeezes the elastic block 19, squeezes the air inside the elastic block 19 into the injection cavity 14 below the elastic pad 15, causes the elastic pad 15 to deform upward, and squeezes the water above the elastic pad 15 upward through the nozzle 18 to clean the lens;

[0057] S4: When the monitoring platform 2 moves out of the protection box 1, the elastic member 16 drives the elastic pad 15 to recover downward, and the water in the water storage box 13 enters the injection cavity 14 above the elastic pad 15 through the water pipe 17 to replenish the cleaning water;

[0058] S5: When the monitoring platform 2 moves outward and passes through the window 4, the inclined claw 26 is blocked by the bottom of the window 4, and the guide bar 24 pulls the slide bar 21 to slide inside the groove 7 through the guide rod 25, and uses the flexible member 23 to wipe the lens surface of the camera 8 to further remove dust, dirt and water stains left by cleaning.

[0059] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0060] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A monitoring device for connection node structures of assembled building, characterized in that: It comprises a protection box (1), a monitoring platform (2) and a mounting base (3); A window (4) is provided on one side of the protection box (1) close to the mounting seat (3); a motor (5) and a fixing plate (6) are fixedly connected inside the protection box (1); A groove (7) is provided on the lower side of the monitoring platform (2); a camera (8) is arranged inside the monitoring platform (2), and a camera head of the camera (8) extends into the groove (7); A screw rod (9) is rotatably connected between the mounting seat (3) and the fixing plate (6), and the screw rod (9) passes through the monitoring platform (2) and is connected thereto via a screw nut pair; one end of the screw rod (9) is connected to the output shaft of the motor (5); a connecting rod (10) is fixedly connected between the mounting seat (3) and the fixing plate (6), and the connecting rod (10) passes through the monitoring platform (2) and is slidably connected thereto.

2. The device for monitoring the connection node structure of a prefabricated building according to claim 1, characterized in that: A pressure plate (11) is fixedly connected to one side of the monitoring platform (2) close to the mounting seat (3); and a sealing strip (12) is fixedly connected to the surface of the pressure plate (11).

3. The device for monitoring the connection node structure of a prefabricated building according to claim 2, characterized in that: The protection box (1) is provided with a water storage box (13) and a spray chamber (14) inside; an elastic pad (15) is fixedly connected inside the spray chamber (14); an elastic member (16) is fixedly connected between the elastic pad (15) and the spray chamber (14); a water pipe (17) is connected between the spray chamber (14) above the elastic pad (15) and the bottom of the water storage box (13); a nozzle (18) is connected to the top of the spray chamber (14); a hollow elastic block (19) is fixedly connected to one side of the fixed plate (6) close to the monitoring station (2); and an air pipe (20) is connected between the spray chamber (14) below the elastic pad (15) and the elastic block (19).

4. The device for monitoring the connection node structure of a prefabricated building according to claim 3, characterized in that: A one-way valve is arranged inside the water pipe (17); and a pressure relief valve is arranged inside the spray head (18).

5. The device for monitoring the connection node structure of a prefabricated building according to claim 4, characterized in that: A slide bar (21) is slidably connected inside the groove (7); an elastic member (22) is fixedly connected between the slide bar (21) and the groove (7); a flexible member (23) is fixedly connected to the upper side of the slide bar (21); a guide bar (24) is provided on the side of the monitoring platform (2) away from the pressure plate (11); an elastic inclined claw (26) is fixedly connected to the lower side of the guide bar (24); a guide rod (25) is fixedly connected between the guide bar (24) and the slide bar (21), and the guide rod (25) is slidably connected to the monitoring platform (2).

6. The device for monitoring the connection node structure of a prefabricated building according to claim 5, characterized in that: A collecting groove (27) is provided on one side of the protection box (1); a connecting groove (28) is connected between the collecting groove (27) and the top of the water storage box (13); and a water absorbing member (29) is fixedly connected inside the collecting groove (27).

7. The device for monitoring the connection node structure of a prefabricated building according to claim 6, characterized in that: A medicine storage box (30) is arranged on the upper side of the water storage box (13), and the water storage box (13) and the medicine storage box (30) are separated by a partition (31); a guide hole (32) is provided inside the partition (31); and the guide hole (32) is controlled by a switch assembly.

8. The device for monitoring the connection node structure of a prefabricated building according to claim 7, characterized in that: The switch assembly comprises a slide groove (33) provided inside the partition (31); one end of the slide groove (33) is communicated with the guide hole (32), and the other end is communicated with the collecting groove (27); a grid plate (34) is fixedly connected to the position of the slide groove (33) near the collecting groove (27); a slider (35) is slidably connected to the slide groove (33); a spring (36) is fixedly connected between the slider (35) and the slide groove (33); a telescopic block (37) is fixedly connected between the slider (35) and the grid plate (34); a water guide member (38) is connected between the telescopic block (37) and the water absorbing member (29); a blocking upper piece (39) and a blocking lower piece (40) are fixedly connected to one side of the slider (35) near the guide hole (32); one end of the blocking lower piece (40) is slidably connected to the inside of the partition (31); a connection port (41) is provided on the surface of the blocking lower piece (40).

9. A method for monitoring the connection node structure of a prefabricated building, the method using the prefabricated building connection node structure monitoring device according to claim 8, characterized in that: The following steps are involved: S1: The motor (5) drives the screw (9) to rotate, controls the monitoring platform (2) to move slowly along the screw (9) and the connecting rod (10) above the floor joint, and uses a camera to monitor the health status of the entire joint; S2: The monitoring platform (2) is stored in the protection box (1), the pressure plate (11) is attached to the surface of the window (4), and the sealing strip (12) is pressed tightly, thereby sealing the window (4) to prevent external debris from entering the protection box (1); S3: When the monitoring platform (2) enters the protective box (1), it squeezes the elastic block (19), and squeezes the air inside the elastic block (19) into the injection cavity (14) below the elastic pad (15), causing the elastic pad (15) to deform upward, and squeezes the water above the elastic pad (15) upward through the nozzle (18) to clean the lens.

10. A method for monitoring the connection node structure of a prefabricated building according to claim 9, characterized in that: The method further comprises the following steps: S4: When the monitoring platform (2) moves out of the protection box (1), the elastic member 1 (16) drives the elastic pad (15) to return downward, and the water in the water storage box (13) enters the injection cavity (14) above the elastic pad (15) through the water pipe (17) to replenish the cleaning water; S5: When the monitoring platform (2) moves outward and passes through the window (4), the inclined claw (26) is blocked by the bottom of the window (4), and the guide bar (24) pulls the slide bar (21) to slide inside the groove (7) through the guide rod (25), and uses the flexible member (23) to wipe the lens surface of the camera (8) to further remove dust, dirt and water stains left by cleaning.

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