Cantilever scaffold monitoring system

Abstract

The invention relates to the field of scaffold detection, and particularly discloses a cantilever scaffold monitoring system which comprises a fixed seat connected with a building, a monitoring box arranged on the outer side of a vertical rod of a scaffold in a sleeving mode is connected to the side face of the fixed seat, the vertical rod and the monitoring box can move relatively, and a mounting cavity is formed in the monitoring box. A middle plate located in the installation cavity is fixed to the outer wall of the vertical rod, at least one through hole located in the outer side of the vertical rod is formed in the middle plate, a corresponding light source is arranged over the through hole, the diameter of the through hole is larger than the wavelength of light emitted by the light source, and light spots consistent with the through hole in shape are formed after the light penetrates through the through hole. A photosensitive element used for receiving and monitoring light spot area changes is arranged below the middle plate. The settlement condition of the scaffold can be monitored, use is easy, the monitoring efficiency is high, naked eye observation is not needed, and the monitoring result is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of scaffold settlement monitoring, and in particular to a cantilever scaffold monitoring system. Background Art

[0002] With the rapid development of urbanization, more and more people are pouring into cities, the land in cities is becoming more and more valuable, and the buildings are being built higher and higher. During construction, cantilever scaffolding is set up on the outside of the building to support the workers and to carry out the installation of various equipment and the lifting and transportation of materials. The overall quality of the cantilever scaffolding structure of high floors cannot be ignored. When the bottom support column (usually I-beam) is subjected to strong pressure, it will produce a small range of settlement. Generally, the settlement distance is within the standard range and there is no need to correct the scaffolding structure. If the settlement is relatively large, it will have a greater impact on the force structure of the scaffolding and affect the overall structural stability. Therefore, it is necessary to set up a detection device after the scaffolding is erected to monitor the settlement of the scaffolding.

[0003] In the prior art, the deformation and settlement of scaffolding are mainly observed using levels, theodolites, and the naked eye. Using instruments such as theodolites is cumbersome and inefficient, making monitoring impossible and inefficient. Visual observation, on the other hand, produces inaccurate monitoring results. Summary of the Invention

[0004] The purpose of the present invention is to provide a cantilever scaffolding monitoring system that can monitor the settlement of the scaffolding, is simple to use, has high monitoring efficiency, does not require visual observation, and has accurate monitoring results.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions: A cantilever scaffolding monitoring system includes a fixed base connected to a building, a monitoring box mounted on the outside of the scaffolding upright pole connected to the side of the fixed base, the upright pole and the monitoring box can move relative to each other, the monitoring box has an installation cavity inside, an intermediate plate located in the installation cavity is fixed on the outer wall of the upright pole, the intermediate plate is provided with at least one through hole located on the outside of the upright pole, a corresponding light source is provided directly above the through hole, the diameter of the through hole is larger than the wavelength of the light emitted by the light source, and a light spot consistent with the shape of the through hole is formed after the light passes through the through hole, and a photosensitive element for receiving and monitoring changes in the light spot area is provided below the intermediate plate.

[0006] In this solution, the fixed seat serves as the base of the monitoring system and is firmly connected to the building structure to ensure the stability of the entire monitoring system. The monitoring box is mounted on the outside of the scaffolding pole and can move relative to the pole. The internal space of the installation cavity is used to accommodate optical monitoring components. The middle plate is fixed to the outer wall of the pole and moves synchronously with the pole. The through hole is used to form a standard light spot. The diameter must be larger than the wavelength of the light source to avoid diffraction effects interfering with the shape of the light spot. The light source is located directly above the through hole and emits parallel light or collimated light. The photosensitive element is located below the middle plate to receive the light spot and monitor its area changes.

[0007] Initial state: When the pole is not deformed, the shape of the light spot is consistent with the through hole, and the photosensitive element records the initial light spot area.

[0008] Deformation monitoring: If the vertical pole undergoes axial settlement, the middle plate will also move, causing the relative position of the through hole and the light source to change, which in turn causes the light spot area to increase or decrease. The photosensitive element captures the changes in real time and transmits them to the data processing unit.

[0009] Data Processing: An algorithm analyzes changes in the spot area and, combined with calibration data (such as the linear relationship between spot area and pole settlement), calculates the actual settlement of the pole. A threshold can be set to trigger an alarm when settlement exceeds a safe range. This system enables monitoring of scaffolding settlement, offering simple, efficient, and accurate results without the need for visual observation.

[0010] Optionally, the middle plate is provided with four through holes distributed in a cross shape, the through holes are circular or square, the top wall of the installation cavity is provided with four installation tubes corresponding to the through holes, the light source is arranged on the top wall of the installation cavity and is located on the center line of the installation tube, and a flexible membrane is provided between the lower end of the installation tube and the middle plate.

[0011] Optionally, a tension sensor is embedded in the flexible membrane.

[0012] Optionally, the middle plate is composed of two semicircular plates, and a semicircular groove is provided in the middle of the straight side of the semicircular plate. When the two semicircular plates are closed, the middle part forms a circular groove adapted to the vertical pole.

[0013] Optionally, the photosensitive element is a charge coupler, which is mounted on the bottom wall of the mounting cavity, with the photosensitive surface of the charge coupler facing the through hole.

[0014] Optionally, the number of the photosensitive elements corresponds to the number of through holes.

[0015] Optionally, there is one photosensitive element, a through hole is provided in the middle of the photosensitive element to allow the vertical pole to pass through, the vertical pole passes through the through hole, and a protective rubber ring is provided on the inner wall of the through hole.

[0016] Optionally, the top and bottom surfaces of the monitoring box are provided with assembly holes for allowing the vertical pole to pass through, and the vertical pole passes through the two assembly holes along the axial direction.

[0017] Optionally, a sealing ring is provided on the inner wall of the assembly hole.

[0018] Optionally, the monitoring box is a rectangular structure consisting of a top plate, a bottom plate, a left plate, a right plate, a front plate, and a rear plate. The top plate, the bottom plate, the left plate, and the right plate are fixedly connected to form a box body with an opening on the front side. The upper end of the front plate is hinged to the front end of the top plate, and a sealing gasket is provided on the inner side of the front plate. The front plate is connected to the edge of the opening by screws or the front plate and the box body are connected by wrapping tape.

[0019] The present invention has the beneficial effects: In the present invention, when the upright is intact, the light spot shape aligns with the through-hole, and the photosensitive element records the initial light spot area. If the upright undergoes axial settlement, the intermediate plate also moves, causing the relative position of the through-hole and the light source to change, which in turn causes the light spot area to increase or decrease. The photosensitive element captures this change in real time and transmits it to the data processing unit. An algorithm analyzes the change in light spot area, combined with calibration data (such as the linear relationship between light spot area and upright settlement), to calculate the actual settlement of the upright. A threshold can be set, and an alarm is triggered when the settlement exceeds a safe range. This system enables monitoring of scaffolding settlement, is simple to use, highly efficient, and eliminates the need for visual observation, resulting in accurate monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the assembly structure of the present invention and the vertical pole; Figure 2 This is a schematic diagram of the internal structure of the monitoring box when there are multiple photosensitive elements; Figure 3 This is a schematic diagram of the internal structure of the monitoring box when there is one photosensitive element; Figure 4 Schematic diagram of light passing through the through hole; Figure 5 This is the structural diagram when the middle plate is separated; Figure 6 This is the structural diagram after the middle plate is folded; Figure 7 This is the structural diagram after the middle plate and the vertical pole are assembled; Figure 8 This is the structural diagram of the monitoring box.

[0021] Figure markings: 1-fixed seat, 2-monitoring box, 201-top plate, 202-bottom plate, 203-front plate, 204-assembly hole, 205-left plate, 206-right plate, 207-rear plate, 208-opening, 209-sealing ring, 3-light source, 4-mounting tube, 5-middle plate, 501-semicircular plate, 502-circular groove, 5021-semicircular groove, 6-through hole, 7-photosensitive element, 8-vertical pole, 9-exterior facade, 10-cantilevered I-beam, 11-mounting cavity, 12-light spot, 13-flexible membrane, 14-through hole, 15-protective rubber ring. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0023] A cantilever scaffolding monitoring system includes a fixed base 1 connected to a building, a monitoring box 2 connected to the side of the fixed base 1 and mounted on the outside of the upright pole 8 of the scaffolding, the upright pole 8 and the monitoring box 2 can move relative to each other, and an installation cavity 11 is provided inside the monitoring box 2. An intermediate plate 5 located in the installation cavity 11 is fixed on the outer wall of the upright pole 8, and the intermediate plate 5 is provided with at least one through hole 6 located on the outside of the upright pole 8. A corresponding light source 3 is provided directly above the through hole 6. The diameter of the through hole 6 is larger than the wavelength of the light emitted by the light source 3. After the light passes through the through hole 6, a light spot 12 with the same shape as the through hole 6 is formed. A photosensitive element 7 for receiving and monitoring the area change of the light spot 12 is provided below the intermediate plate 5.

[0024] In this embodiment, Figure 1As shown, the fixing seat 1 serves as the base of the monitoring system and is firmly connected to the building structure to ensure the stability of the entire monitoring system. The horizontality of the monitoring box 2 must also be ensured. The monitoring box 2 is mounted on the outside of the upright pole 8 (steel pipe) of the scaffolding. A monitoring box 2 can be set at intervals of five meters or ten meters, or multiple monitoring boxes 2 can be set in key settlement areas. The upright pole 8 of the scaffolding is set on the cantilevered I-beam 10, and the fixing seat 1 is installed on the facade 9 of the upper floor. After the upright pole 8 is installed, the monitoring box 2 is installed. In this way, the settlement changes of the cantilevered scaffolding can be monitored in real time so that timely adjustments can be made. The monitoring box 2 and the upright pole 8 can move relative to each other. The internal space of the installation cavity 11 is used to accommodate optical monitoring components. The installation cavity 11 is a closed space to prevent external light from affecting the monitoring results. A battery can be set on the side wall of the installation cavity 11 to power the light source 3 and the photosensitive element 7. Of course, it can also be connected to an external power supply through a wire. The middle plate 5 is fixed to the outer wall of the vertical pole 8 and moves synchronously with the vertical pole 8. The through hole 6 is used to form a standard light spot 12. The diameter needs to be larger than the wavelength of the light source 3 to avoid the diffraction effect interfering with the shape of the light spot 12. The light source 3 is located directly above the through hole 6 and emits parallel light or collimated light (such as a laser diode or an LED plus a lens combination. The emitted light beam must completely cover the through hole 6, so as to ensure that the light spot 12 is consistent in shape with the through hole 6). The photosensitive element 7 is located below the middle plate 5, receives the light spot 12 and monitors its area changes.

[0025] Initial state: when the upright pole 8 is not deformed, the shape of the light spot 12 is consistent with the through hole 6, and the photosensitive element 7 records the area of ​​the initial light spot 12.

[0026] Deformation monitoring: If the vertical rod 8 undergoes axial subsidence, the intermediate plate 5 also moves, causing the relative position of the through hole 6 and the light source 3 to change, which in turn causes the area of ​​the light spot 12 to increase or decrease. The photosensitive element 7 captures this change in real time and transmits it to the data processing unit. If the vertical rod 8 tilts or bends, the relative position of the through hole 6 and the light source 3 will also change, and the shape of the resulting light spot 12 will also change. For example, if the through hole 6 is circular, the light spot 12 may be elliptical. Based on the shape comparison of the light spot 12, it can also be used to determine whether the vertical rod 8 is tilted or deformed.

[0027] Data processing: The algorithm analyzes the change in the area of ​​the light spot 12 and combines it with the calibration data (such as the linear relationship between the area of ​​the light spot 12 and the settlement of the pole 8) to calculate the actual settlement of the pole 8. A threshold can be set to trigger an alarm when the settlement exceeds the safe range. Specifically, Figure 4As shown, the area of ​​the light spot 12 is defined as S1, the area of ​​the through hole 6 is S0, the distance from the light source 3 to the through hole 6 is L, and the distance from the through hole 6 to the photosensitive element 7 is D. The area of ​​the light spot 12 increases linearly with the increase of L (following the principle of similar triangles). S0 is a constant and can be directly calculated through the aperture. The initial and changed S1 can be calculated through the photosensitive element 7, so the radius of the light spot 12 can be obtained. The value of L+D is constant and can be measured at the beginning. The changed D can be obtained by comparing it with the initial D using a tangent function relationship, and the displacement of the settlement of the pole 8 can be obtained. Of course, the changed L can also be obtained and compared with the initial L. In this way, the settlement of the scaffold can be monitored. It is simple to use, has high monitoring efficiency, does not require visual observation, and the monitoring results are accurate.

[0028] Furthermore, the middle plate 5 is provided with four through holes 6 distributed in a cross shape, the through holes 6 are circular or square, the top wall of the mounting cavity 11 is provided with four mounting tubes 4 corresponding to the through holes 6, the light source 3 is arranged on the top wall of the mounting cavity 11 and is located on the center line of the mounting tube 4, and a flexible membrane 13 is provided between the lower end of the mounting tube 4 and the middle plate 5.

[0029] Specifically, such as Figure 2 As shown, the flexible membrane 13 is a cylindrical structure. Both the mounting tube 4 and the flexible membrane 13 are opaque. The four through holes 6 are distributed in a cross shape, which can simultaneously monitor the deformation of the pole 8 in two orthogonal directions (horizontal / vertical). By comparing the changes in the four light spots 12, the monitoring results can be cross-verified to eliminate single point failures or local interference (such as dust obstruction).

[0030] The circular through hole 6 is used: the shape of the light spot 12 is less sensitive to the alignment error of the light source 3 and is suitable for quick installation; the area of ​​the light spot 12 is linearly related to the displacement, which simplifies data processing and is suitable for construction sites that require high-frequency, automated monitoring.

[0031] Using a square through hole 6: the edge of the light spot 12 is sharper and the displacement resolution is higher (micron-level deformation can be detected). The aspect ratio of the light spot 12 can be defined, and axial tension and bending deformation can be distinguished. It is suitable for structural health monitoring with extremely high precision requirements (such as historical building protection).

[0032] Each through-hole 6 corresponds to an independent mounting tube 4, preventing crosstalk between adjacent light sources 3 and ensuring the purity of light spot 12. The inner wall of mounting tube 4 can be coated with a reflective layer or equipped with a lens assembly to compress the divergence angle of light source 3 to within ±1°, ensuring a sharp edge to light spot 12. Mounting tube 4 also isolates external mechanical shock (such as scaffolding vibration) and prevents light source 3 from shifting or being damaged. Light source 3 is located on the centerline of mounting tube 4, coinciding with the axis of through-hole 6, eliminating measurement errors introduced by eccentricity of light source 3.

[0033] A flexible membrane 13 is installed between the mounting tube 4 and the intermediate plate 5. This connects the mounting tube 4 and the intermediate plate 5, preventing light leakage and external light interference. The flexible membrane 13 (made of, for example, silicone or TPU) seals the gap between the mounting tube 4 and the intermediate plate 5, preventing rainwater, concrete slurry, and other substances from entering the mounting cavity 11 and extending the life of the device. The thermal expansion coefficient of the flexible membrane 13 matches that of the metal intermediate plate 5, minimizing deformation of the optical components caused by temperature differences.

[0034] The flexible connection allows relative displacement of the intermediate plate 5 and the mounting tube 4 within a ±2mm range (e.g., if the vertical pole 8 is shaken by wind), preventing optical component breakage caused by a rigid connection. The elastic force of the flexible membrane 13 automatically resets the intermediate plate 5 after deformation, ensuring continuous monitoring. The flexible membrane 13 absorbs high-frequency vibrations (such as impact from construction machinery), reducing the jitter of the light spot 12 and improving data stability.

[0035] Specific monitoring process: Initial calibration: When the upright pole 8 is unloaded, record the initial area and shape parameters of the four light spots 12 (such as the diameter of the circular light spot 12 and the side length of the square light spot 12), and establish a calibration curve between the change of the light spot 12 and the displacement of the upright pole 8 (using a known displacement applied by a tension and compression testing machine).

[0036] Real-time monitoring: Photosensitive element 7 captures images of light spots 12 at a frequency of 100 Hz. The area change is calculated using an edge detection algorithm. Combining the data of the four light spots 12, the two-dimensional displacement vector (ΔX, ΔY) of pole 8 can be calculated. For example, if the area of ​​the upper left light spot 12 increases and the area of ​​the lower right light spot 12 decreases, it can be inferred that pole 8 is bending toward the upper left.

[0037] Furthermore, a tension sensor is embedded in the flexible membrane 13 .

[0038] Specifically, highly elastic silicone or TPU (thermoplastic polyurethane) with a thickness of 0.5-1mm is used to balance flexibility and durability. Miniature tension sensors (such as strain gauges or fiber Bragg gratings) are bonded to the inner surface of the flexible membrane 13 with conductive adhesive and covered with a protective layer. During injection molding of the flexible membrane 13, the sensors are pre-embedded within the membrane to protect it from direct exposure to harsh environments. The tension sensors are evenly distributed along the circumference of the flexible membrane 13 (e.g., four sensors are arranged in a cross pattern, corresponding to the through-holes 6) to capture multi-dimensional stress changes. The sensors can be connected to the data acquisition module in the monitoring box 2 via a flexible printed circuit board (FPC) or shielded cable. The connection points are encapsulated with epoxy resin and have an IP68 protection rating, making them suitable for rainy and snowy weather. When the pole 8 settles or bends, the intermediate plate 5 causes the flexible membrane 13 to deform, and the tension sensor outputs a tension signal related to the displacement. Combined with the data on the area change of the light spot 12, this further improves the accuracy of pole 8 settlement monitoring.

[0039] The amplitude and frequency of the tension signal can reflect the dynamic loads (such as wind vibration and construction impact) on the vertical pole 8. For example, if the tension fluctuation frequency coincides with the natural frequency of the scaffolding (such as 2-5Hz), it indicates a possible resonance risk.

[0040] Furthermore, the middle plate 5 is composed of two semicircular plates 501 , and a semicircular groove 5021 is provided in the middle of the straight side of the semicircular plate 501 . When the two semicircular plates 501 are closed, the middle portion forms a circular groove 502 adapted to the vertical pole 8 .

[0041] Specifically, such as Figure 5 、 Figure 6 、 Figure 7 As shown, in order to facilitate the installation of the middle plate 5, the middle plate 5 can be set as two symmetrical semicircular plates 501, each semicircular plate 501 is distributed with two through holes 6, and when the two semicircular plates 501 are closed, the through holes 6 are distributed in a cross shape, and a semicircular groove 5021 is provided in the middle of the straight edge of the semicircular plate 501. The two semicircular grooves 5021 are closed to form a circular groove 502 adapted to the vertical pole 8. The two semicircular plates 501 can be fixed to the vertical pole 8 by bonding or bolting.

[0042] Furthermore, the photosensitive element 7 is a charge coupler, which is mounted on the bottom wall of the mounting cavity 11 , with the photosensitive surface of the charge coupler facing the through hole 6 .

[0043] Furthermore, the number of the photosensitive elements 7 corresponds to the number of the through holes 6 .

[0044] Furthermore, there is one photosensitive element 7 , and a through hole 14 is provided in the middle of the photosensitive element 7 to allow the vertical rod 8 to pass through. The vertical rod 8 passes through the through hole 14 , and a protective rubber ring 15 is provided on the inner wall of the through hole 14 .

[0045] Specifically, such as Figure 3 As shown, when there is only one photosensitive element 7, the photosensitive element 7 needs to be specially designed, and a through hole 14 needs to be designed in the middle for the vertical rod 8 to pass through. In order to prevent the vertical rod 8 from sinking and causing damage to the photosensitive element 7, a protective rubber ring 15 can be set on the inner wall of the through hole 14.

[0046] Furthermore, the top and bottom surfaces of the monitoring box 2 are provided with assembly holes 204 for allowing the vertical rod 8 to pass through, and the vertical rod 8 passes through the two assembly holes 204 along the axial direction.

[0047] Furthermore, a sealing ring 209 is provided on the inner wall of the assembly hole 204 .

[0048] Specifically, the sealing ring 209 can prevent external dust and rain from entering the monitoring box 2. It can also prevent external light from entering the monitoring box 2 and affecting the monitoring results.

[0049] Furthermore, the monitoring box 2 is a rectangular structure consisting of a top plate 201, a bottom plate 202, a left plate 205, a right plate 206, a front plate 203, and a rear plate 207. The top plate 201, the bottom plate 202, the left plate 205, and the right plate 206 are fixedly connected to form a box body with an opening 208 on the front side. The upper end of the front plate 203 is hinged to the front end of the top plate 201, and a sealing gasket is provided on the inner side of the front plate 203. The front plate 203 is connected to the edge of the opening 208 by screws or the front plate 203 and the box body are connected by wrapping tape.

[0050] Specifically, such as Figure 8 As shown, during installation, the lower end of the vertical pole 8 directly passes through the assembly hole 204 on the top plate 201 and the assembly hole 204 on the bottom plate 202, so that the monitoring box 2 is in a suspended state and remains horizontal, and then the fixing seat 1 is installed on the side wall of the building through the explosive bolts, the front plate 203 is opened, the middle plate 5 is connected to the vertical pole 8, and the position of the through hole 6 is adjusted to correspond to the light source 3, and then the lower end of the flexible membrane 13 is connected to the middle plate 5, which can be done by bonding, and finally the front plate 203 is fixed, and the package is complete, and then the settlement monitoring of the vertical pole 8 can be started.

[0051] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A cantilever scaffold monitoring system, comprising a fixing base (1) connected to a building, characterized in that: The side of the fixing seat (1) is connected to a monitoring box (2) which is sleeved on the outside of the vertical pole (8) of the scaffold. The vertical pole (8) and the monitoring box (2) can move relative to each other. The monitoring box (2) has an installation cavity (11) inside. An intermediate plate (5) located in the installation cavity (11) is fixed on the outer wall of the vertical pole (8). The intermediate plate (5) is provided with at least one through hole (6) located on the outside of the vertical pole (8). A corresponding light source (3) is provided just above the through hole (6). The diameter of the through hole (6) is larger than the wavelength of the light emitted by the light source (3). After the light passes through the through hole (6), a light spot (12) having the same shape as the through hole (6) is formed. A photosensitive element (7) for receiving and monitoring the change in the area of ​​the light spot (12) is provided below the intermediate plate (5).

2. A cantilever scaffolding monitoring system according to claim 1, characterized in that: The intermediate plate (5) is provided with four through holes (6) distributed in a cross shape, the through holes (6) are circular or square, the top wall of the installation cavity (11) is provided with four installation cylinders (4) corresponding to the through holes (6), the light source (3) is arranged on the top wall of the installation cavity (11) and is located on the center line of the installation cylinder (4), and a flexible membrane (13) is provided between the lower end of the installation cylinder (4) and the intermediate plate (5).

3. A cantilever scaffolding monitoring system according to claim 2, characterized in that: A tension sensor is embedded in the flexible film (13).

4. A cantilever scaffold monitoring system according to claim 2, characterized in that: The intermediate plate (5) is composed of two semicircular plates (501), and a semicircular groove (5021) is provided in the middle of the straight side of the semicircular plate (501). When the two semicircular plates (501) are closed, the middle portion forms a circular groove (502) adapted to the vertical pole (8).

5. The cantilever scaffolding monitoring system according to claim 1, characterized in that: The photosensitive element (7) is a charge coupler, which is mounted on the bottom wall of the mounting cavity (11), with the photosensitive surface of the charge coupler facing the through hole (6).

6. A cantilever scaffold monitoring system according to claim 5, characterized in that: The number of the photosensitive elements (7) corresponds to the number of the through holes (6).

7. The cantilever scaffolding monitoring system according to claim 5, characterized in that: There is one photosensitive element (7), and a through hole (14) is provided in the middle of the photosensitive element (7) to allow the vertical rod (8) to pass through. The vertical rod (8) passes through the through hole (14), and a protective rubber ring (15) is provided on the inner wall of the through hole (14).

8. The cantilever scaffolding monitoring system according to claim 1, characterized in that: The top and bottom surfaces of the monitoring box (2) are provided with assembly holes (204) that allow the vertical pole (8) to pass through, and the vertical pole (8) passes through the two assembly holes (204) along the axial direction.

9. The cantilever scaffolding monitoring system according to claim 8, characterized in that: A sealing ring (209) is provided on the inner wall of the assembly hole (204).

10. The cantilever scaffolding monitoring system according to claim 8, characterized in that: The monitoring box (2) is a rectangular structure consisting of a top plate (201), a bottom plate (202), a left plate (205), a right plate (206), a front plate (203), and a rear plate (207). The top plate (201), the bottom plate (202), the left plate (205), and the right plate (206) are fixedly connected to form a box body with an opening (208) on the front side. The upper end of the front plate (203) is hinged to the front end of the top plate (201). A sealing gasket is provided on the inner side of the front plate (203). The front plate (203) is connected to the edge of the opening (208) by screws or the front plate (203) and the box body are connected by wrapping tape.

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