A device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method

Abstract

The present invention discloses a device and method for detecting damage to a disc-type scaffolding based on a pneumatic acoustic wave method, belonging to the field of nondestructive testing technology. The device comprises: a disc-type scaffolding, wherein the first hollow vertical pole, the second hollow vertical pole, the hollow crossbar, and the hollow diagonal pole all adopt a hollow structure, and the discs and connecting fasteners are solid; an air blowing device comprising an air compressor, an air pipe, an air nozzle, a gas regulating valve, a bracket, a pressure relief device, and a noise suppressor, the air blowing device being connected to the disc-type scaffolding via the air nozzle; and a damage detection module comprising a fixing device, an acoustic wave signal sensor, and a signal analysis system, the damage detection module being connected to the disc-type scaffolding via the acoustic wave signal sensor. The present invention provides a method for rapidly identifying and locating damage to a disc-type scaffolding and can be used for damage detection of disc-type scaffolding in real environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-destructive testing, and in particular relates to a device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method. Background Art

[0002] Disc-type scaffolding has been widely used in construction due to its efficient assembly method and good load-bearing performance. Since scaffolding often needs to bear various complex loads during the construction process, especially in the case of long-term use or repeated disassembly and assembly, it is prone to problems such as fatigue, deformation, cracks and corrosion. Through detection, potential structural problems can be discovered in a timely manner, the load-bearing capacity of the scaffolding can be evaluated, and it can be ensured that all components of the scaffolding are in good working condition during the construction process. However, existing scaffolding detection technologies have problems such as difficulty in detecting fine cracks, large environmental interference, and complex and expensive equipment, resulting in low accuracy and efficiency of detection results. Therefore, the present invention proposes a disc-type scaffolding damage detection device and method based on the pneumatic acoustic wave method. By introducing an air blowing device and an acoustic sensor, it can achieve rapid and accurate detection of internal damage to the scaffolding, overcoming the limitations of traditional methods. This method is convenient for construction and can also provide reliable damage detection results in complex environments, significantly improving construction safety and detection efficiency.

[0003] After review, compared with the published patents, this patent has the following originality:

[0004] CN202410474020.6 discloses a damage identification method, device and computer equipment for construction scaffolding. It can construct a corresponding numerical model according to the specific structure of the construction scaffolding, determine the detection points of each layer of the construction scaffolding, and set a detection device at the detection point to obtain the structural response of the detection point, but does not describe the specific detection method; CN202320006514.2 discloses a local anti-instability monitoring and alarm structure for scaffolding, but cannot detect damage to the scaffolding; CN103852522B discloses a method for scaffolding safety monitoring and early warning. This method is a passive detection method and cannot obtain existing damage to the scaffolding. In addition, the acoustic emission technology is too expensive and cannot achieve long-term real-time monitoring. Summary of the Invention

[0005] In view of the above-mentioned problems of the existing scaffolding detection technology, such as difficulty in detecting fine cracks, large environmental interference, and complex and expensive equipment, the present invention proposes a disc-type scaffolding damage detection device and method based on the pneumatic acoustic wave method.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides a disc-type scaffolding damage detection device and method based on the pneumatic acoustic wave method, including a disc-type scaffolding, an air blowing device and a damage detection module and a disc-type scaffolding damage detection method based on the pneumatic acoustic wave method.

[0007] The present invention provides a device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method, characterized in that: the disc-type scaffold comprises a first hollow vertical pole, a second hollow vertical pole, a hollow cross bar, a hollow oblique bar, a disc, and connecting fasteners, such as Figure 1 shown.

[0008] Furthermore, the upper part of the No. 2 hollow vertical pole is fixed with a buckle by welding, and the lower part of the No. 1 hollow vertical pole is inserted into the upper part of the No. 2 hollow vertical pole; the hollow cross bar and the hollow diagonal rod are both welded with connecting fasteners at the ends; the hollow cross bar and the hollow diagonal rod are connected to the No. 2 hollow vertical pole by inserting the connecting fasteners into the cross bar sockets of the buckle.

[0009] Furthermore, the No. 1 hollow vertical pole, No. 2 hollow vertical pole, hollow cross bar, and hollow diagonal pole can all be provided with air inlet holes, No. 1 air outlet holes, and No. 2 air outlet holes. The air inlet holes and No. 1 air outlet holes are respectively located at the two ends of the hollow pole. The air inlet holes, No. 1 air outlet holes, and No. 2 air outlet holes also include reinforcement rings provided at the edges of the holes. The No. 1 air outlet holes and No. 2 air outlet holes overlap after the No. 1 hollow vertical pole is inserted into the No. 2 hollow vertical pole.

[0010] Preferably, the air inlet, the first air outlet and the second air outlet are circular.

[0011] Preferably, the reinforcement ring is made of the same material as the scaffolding, but may also be made of a material with higher strength.

[0012] The air blowing device includes an air compressor, an air pipe, an air nozzle, a gas regulating valve, a bracket, a pressure relief device, and a noise suppressor.

[0013] Furthermore, the air compressor is connected to an air pipe, an air nozzle is provided at the end of the air pipe, the air compressor is arranged on a bracket, the bracket is placed on a scaffolding board adjacent to the scaffolding rod to be tested, the gas regulating valve connects the air pipe and the air nozzle, the noise suppressor is installed at the outlet of the air nozzle; the pressure relief device is installed on the side of the air nozzle;

[0014] The damage detection module includes a fixing device, an acoustic wave signal sensor and a signal analysis system; the fixing device includes a magnetic base and an adjustment arm; the magnetic base is connected to the adjustment arm, and a chuck is provided at the end of the adjustment arm; the acoustic wave signal sensor includes an acoustic wave sensing element and a signal transmission line, the acoustic wave sensing element is connected to the signal transmission line, the acoustic wave sensing element is fixed on the chuck and is in close contact with the rod to be tested.

[0015] A device and method for detecting damage to a disc-type scaffold based on a pneumatic acoustic wave method is characterized in that the main contents of the disc-type scaffolding damage detection method based on a pneumatic acoustic wave method are: fixing the disc-type scaffolding on the ground, placing an air blowing device near the scaffolding to be tested, detecting the ventilation status of the hollow rods of the scaffolding to be tested, debugging a damage detection module, and using the damage detection module to test the scaffolding to be tested.

[0016] Furthermore, the lower portion of the second hollow upright pole (7) is inserted into the ground and reinforced with a support plate.

[0017] Furthermore, the ambient noise of the air blowing device shall not be higher than 60db, and the change in ambient noise during the test shall not be greater than 20db.

[0018] Preferably, high-pressure air blowing is used to blow out debris in the hollow rod.

[0019] Preferably, a noise suppressor is used in a high noise environment to reduce the impact of environmental noise on the acoustic sensor.

[0020] Furthermore, the acoustic signal S1(t) of the sensor is recorded at 1 / 3 of the rod, and the acoustic signal S2(t) of the sensor is recorded at 1 / 3 of the rod within 5 minutes. By comparing the signal differences between adjacent measuring points, the influence of background noise and normal airflow sound is eliminated, and the damage signal S is extracted. d (t), is calculated by the following formula:

[0021] S d (t) = S1(t) - S2(t) (1)

[0022] Preferably, the signal is divided into multiple time windows, each with an adjustable length Δt. The frequency and amplitude characteristics of the signal within each time window are analyzed, and characteristic signals related to damage are identified by comparing the changes in the signals within different time windows.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are:

[0024] The present invention provides a device and method for detecting damage to disc-type scaffolding based on a pneumatic acoustic wave method. Compared with the existing technology, the present invention achieves rapid and accurate detection of scaffolding damage by combining a pneumatic acoustic wave method with an acoustic sensor, overcoming the problem that traditional detection methods have difficulty detecting subtle damage inside hollow structures. The method provided by the present invention is simple to operate and can be flexibly applied in complex construction environments, significantly improving detection efficiency and safety. In addition, the method provided by the present invention significantly reduces detection costs and extends the service life of the scaffolding through non-destructive detection methods, further ensuring the structural safety and reliability during the construction process. It is expected to be widely used in various types of construction and large-scale infrastructure projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 A schematic diagram of a disc-type scaffolding structure provided in Example 1;

[0027] Figure 2 A schematic diagram of the structure of a hollow vertical rod, a hollow horizontal rod, and a hollow diagonal rod provided in Example 1;

[0028] Figure 3 A schematic diagram of an air blowing device provided in Example 2;

[0029] Figure 4 A schematic diagram of a damage detection module provided in Example 4;

[0030] In the above figures, 1. Hollow vertical pole No. 1; 2. Hollow diagonal pole; 3. Hollow horizontal pole; 4. Buckle; 5. Connecting fastener; 6. Air inlet; 7. Hollow vertical pole No. 2; 8. Air outlet No. 2; 9. Air outlet No. 1; 10. Reinforcement ring; 11. Horizontal pole jack; 12. Air compressor; 13. Air pipe; 14. Air nozzle; 15. Gas regulating valve; 16. Bracket; 17. Pressure relief device; 18. Noise suppressor; 19. Sound wave sensing element; 20. Signal analysis system; 21. Magnetic meter stand; 22. Adjustment arm; 23. Chuck; 24. Signal transmission line. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other in the absence of conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Example 1: This example aims to implement the installation of a disc-type scaffolding structure. Figure 1 and Figure 2 When installing the disc-type scaffolding on the ground, you need to follow the following steps to ensure the safety and stability of the structure:

[0034] 1. Make sure the ground is flat, solid, and has sufficient load-bearing capacity. If the ground is soft or uneven, it needs to be reinforced or supported by pads to prevent the scaffolding from settling or tilting.

[0035] 2. Place a solid pad at the bottom of each pole to ensure that the load is evenly distributed on the ground and avoid excessive point pressure causing ground subsidence.

[0036] 3. Insert the bottom of the second hollow pole (7) into the socket on the pad, making sure each pole is perpendicular to the ground and calibrate it using a level ruler.

[0037] 4. Weld the buckle (4) to the predetermined height position of the second hollow vertical pole (7) to ensure that the buckle surface is horizontal.

[0038] 5. Connect the hollow cross bar (3) and the hollow diagonal bar (2) to the second hollow vertical bar (7) by inserting the connecting fasteners (5) into the cross bar sockets (11) of the buckle (4), ensuring that the connection between the bars is firm and not loose.

[0039] 6. Insert the bottom of the No. 1 hollow pole (1) into the upper part of the No. 2 hollow pole (7), ensuring that the poles are aligned and that the No. 1 air outlet (9) and the No. 2 air outlet (8) overlap.

[0040] 7. Continue to install more layers of vertical poles, horizontal poles and diagonal poles as needed. The installation method of each layer is the same as the foundation layer.

[0041] 8. Ensure that all connections between the buckles (4), connecting fasteners (5) and rods are secure and not loose or deviated.

[0042] 9. Use a spirit level and plumb line to check the verticality of the vertical poles and the horizontality of the horizontal poles again. If there is any deviation, adjust it in time.

[0043] 10. Test the stability of the scaffolding by gently pushing and pulling to ensure that the structure will not shift or tilt during use.

[0044] 11. Lay scaffolding in appropriate locations to ensure that construction workers have a safe operating platform. Install safety nets, guardrails and other protective facilities according to construction needs to ensure construction safety.

[0045] Example 2: This example is intended to provide an example of how to place an air blowing device. Figure 3 When placing the air blowing device, you need to follow the following steps to ensure the stability of the air blowing device:

[0046] 1. The inspector lays the scaffolding board near the inspection position of the scaffolding to ensure the stability of personnel and equipment during the operation. The air compressor (12) is placed on the scaffolding board and fixed with the bracket (16) to ensure that the air compressor (12) will not be displaced or tipped over during the operation.

[0047] 2. Connect one end of the air pipe (13) to the air compressor (12) and the other end to the air nozzle (14). The shape and size of the air nozzle (14) match the air inlet hole (6) of the hollow rod to ensure that the air flow can be smoothly injected into the rod.

[0048] 3. Fasten the air nozzle (14) to the air inlet (6) of the rod to be tested, ensuring the airtightness between the air nozzle (14) and the air inlet (6) to prevent air leakage. Adjust the angle and direction of the air nozzle to align it with the air inlet.

[0049] 4. A gas regulating valve is connected between the air pipe (13) and the air nozzle (14). The pressure and flow of the air flow can be accurately controlled by the regulating valve to ensure the stability and appropriateness of the air flow.

[0050] 5. Install a noise suppressor (18) at the outlet of the air nozzle (14) to reduce the noise generated by the air flow and avoid interference with the detection signal of the acoustic sensor (19).

[0051] 6. Install a pressure relief device (17) on the side of the air nozzle (14) to safely release the residual pressure in the air pipe after the test is completed to prevent equipment damage or operator injury.

[0052] Example 3: This example aims to provide a test example for the ventilation status of a hollow rod of a scaffold to be tested. When testing the ventilation status of a hollow rod of a scaffold to be tested, the following steps need to be followed to ensure the accuracy of the test:

[0053] 1. Perform a visual inspection of the rod to be tested to ensure there is no obvious physical damage, blockage or other problems that may affect the ventilation effect.

[0054] 2. Start the air compressor (12) and gradually increase the air pressure. The air flow into the hollow rod is controlled by the gas regulating valve (15). The pressure sensor monitors the air pressure in real time to ensure the pressure is stable.

[0055] 3. Observe the airflow from the vents to confirm its smoothness and continuity. Use the pressure sensor reading to determine if ventilation is smooth. A sudden increase or fluctuation in airflow pressure may indicate poor ventilation or a partial blockage.

[0056] 4. Place an acoustic sensor near the air outlet (8) of the rod to capture the acoustic wave signal generated when the air flows through the rod. Analyze the spectrum and intensity of the signal to determine the degree of ventilation.

[0057] 5. Clean the rod with poor ventilation to ensure that there is no blockage inside. After cleaning, test the ventilation status again to confirm that the problem has been solved.

[0058] 6. If the ventilation condition cannot be improved after cleaning, replace the rod to ensure the overall ventilation effect and structural safety of the scaffolding.

[0059] Example 4: This example provides an example of debugging a damage detection module. When debugging a damage detection module, the following steps need to be followed to ensure a good debugging effect:

[0060] 1. Start the air blowing device, allow air to flow through the rod, and observe the real-time output of the acoustic signal sensor. Check whether the sensor can capture the acoustic signal generated by air flowing through the damaged area.

[0061] 2. Based on the results of the preliminary test, optimize the sensitivity of the sensor by adjusting the sensor's amplifier gain or filter parameters so that it can accurately capture damage signals under different airflow intensities.

[0062] 3. Gradually adjust the air flow pressure and flow rate of the air blowing device, test the response of the sensor at different frequencies, and ensure that the sensor can maintain good response characteristics throughout the expected frequency range.

[0063] Example 5: This example provides an example of using a damage detection module to test a scaffold. When testing for scaffold damage, the following steps need to be followed to ensure the accuracy of the test results:

[0064] 1. Based on the results of the preliminary safety assessment, select the most critical areas of the scaffolding structure for testing.

[0065] 2. Prepare a debugged damage detection module, including the acoustic wave sensing element (19), signal transmission line (24) and signal analysis system (20), and ensure that all components are in good working condition.

[0066] 3. Install the acoustic signal sensor on the selected scaffolding node. First, firmly adsorb the magnetic base (21) of the fixture onto the surface of the rod to be measured, and adjust the position of the sensor by adjusting the arm (22) so that it is close to the surface of the node to be measured to ensure the stability of signal acquisition.

[0067] 4. Connect the sensor to the signal analysis system (20) via the signal transmission line (24) to ensure that there is no loss or interference during the signal transmission process.

[0068] 5. Install the air blowing device at the appropriate location on the scaffold to be tested, ensuring that the air compressor (12), air pipe (13), air nozzle (14), and air regulating valve (15) are properly connected. The air nozzle (14) should be installed at the air inlet (6) of the hollow rod to ensure that the air flow can smoothly enter the rod.

[0069] 6. Start the air compressor (12) and gradually increase the airflow pressure to allow the airflow to pass through the hollow rod. The acoustic signal sensor will capture the acoustic signal generated by the airflow passing through the damaged area in real time.

[0070] 7. The signal analysis system (20) analyzes the acoustic wave signals collected by the sensor in real time. The system determines whether there is damage and accurately locates the damage through spectrum analysis, time domain analysis and pattern recognition of the signal.

[0071] 8. The signal analysis system (20) performs a detailed analysis of the signal at each detection point to identify abnormal signals and damage characteristics. The system outputs the health status of each detection point, including whether there are cracks, corrosion or other structural damage, and the severity of the damage.

[0072] 9. Generate an overall health assessment report for the scaffolding under test based on the data from all test points. The report should include the location, type, severity of each damage point, and an assessment of its impact on the overall structural safety.

Claims

1. A disc-type scaffold damage detection device based on pneumatic acoustic wave method, characterized in that: The pneumatic acoustic wave method-based disc-type scaffolding damage detection device comprises a disc-type scaffolding, an air blowing device and a damage detection module; The disc-type scaffold comprises a No. 1 hollow vertical pole (1), a No. 2 hollow vertical pole (7), a hollow cross bar (3), a hollow oblique pole (2), a disc-type scaffold (4), and a connecting fastener (5); the upper portion of the No. 2 hollow vertical pole (7) is fixed with the disc-type scaffold (4) by welding, and the lower portion of the No. 1 hollow vertical pole (1) is inserted into the upper portion of the No. 2 hollow vertical pole (7); the hollow cross bar (3) and the hollow oblique pole (2) are both welded with the connecting fastener (5) at their ends; the hollow cross bar (3) and the hollow oblique pole (2) are connected by inserting the connecting fastener (5) into the cross bar socket (11) of the disc-type scaffold (4). The second hollow vertical rod (7) is connected; the first hollow vertical rod (1), the second hollow vertical rod (7), the hollow cross bar (3), and the hollow oblique rod (2) all include an air inlet (6), a first air outlet (9), and a second air outlet (8); the air inlet (6) and the first air outlet (9) are respectively located at the two ends of the hollow rod; the air inlet (6), the first air outlet (9), and the second air outlet (8) also include a reinforcing ring (10) provided at the edge of the hole; the first air outlet (9) and the second air outlet (8) overlap after the first hollow vertical rod (1) is inserted into the second hollow vertical rod (7); The air blowing device comprises an air compressor (12), an air pipe (13), an air nozzle (14), a gas regulating valve (15), a bracket (16), a pressure relief device (17), and a noise suppressor (18); the air compressor (12) is connected to the air pipe (13); an air nozzle (14) is provided at the end of the air pipe (13); the air compressor (12) is arranged on the bracket (16), and the bracket is placed on a scaffolding board adjacent to the scaffolding rod to be tested; the gas regulating valve (15) connects the air pipe (13) and the air nozzle (14); the noise suppressor (18) is installed at the outlet of the air nozzle (14); the pressure relief device (17) is installed on the side of the air nozzle (14); The damage detection module includes a fixing device, an acoustic wave signal sensor and a signal analysis system (20); the fixing device includes a magnetic base (21) and an adjustment arm (22); the magnetic base (21) is connected to the adjustment arm (22), and a clamp (23) is provided at the end of the adjustment arm (22); the acoustic wave signal sensor includes an acoustic wave sensing element (19) and a signal transmission line (24); the acoustic wave sensing element (19) is connected to the signal transmission line (24), and the acoustic wave sensing element is fixed on the clamp (23) and is in close contact with the rod to be tested.

2. A method for detecting damage to a disc-type scaffold based on an aerodynamic acoustic wave method, the method being based on the disc-type scaffold damage detection device based on an aerodynamic acoustic wave method as claimed in claim 1, characterized in that: The pneumatic acoustic wave method-based disc-type scaffolding damage detection method comprises the following steps: S1: Fix the disc-type scaffolding on the ground; S2: Place the air blowing device near the scaffold to be tested; S3: Detect the ventilation status of the hollow rods of the scaffold to be tested; S4: debug the damage detection module; S5: Use the damage detection module to test the scaffolding to be tested; In step S1, the lower portion of the second hollow vertical pole (7) is inserted into the ground; In step S2, the ambient noise of the air blowing device shall not exceed 60dB, and the change of the ambient noise during the detection period shall not exceed 20dB; In step S3, there should be no debris in the hollow rod; In step S5, the acoustic signal of the sensor is recorded at 1 / 3 of the rod. S 1( t ), record the acoustic signal of the sensor at 1 / 3 of the rod within 5 minutes S 2( t ), by using the signal difference between adjacent measurement points, the influence of background noise and normal airflow sound is eliminated and the damage signal is extracted S d ( t ), calculated using the following formula: S d ( t )= S 1( t )- S 2( t ) （1）。 3. The device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method according to claim 2, characterized in that: The step S1 further comprises the following sub-steps: the lower portion of the second hollow vertical pole (7) inserted into the ground is reinforced with a support pad, and the lower portion of the second hollow vertical pole (7) passes through the support pad.

4. The device and method for detecting damage to a disc-type scaffold based on a pneumatic acoustic wave method according to claim 2, characterized in that: The step S2 further includes the following sub-step: using a noise suppressor to reduce the impact of environmental noise on the acoustic sensor in a high-noise environment.

5. The device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method according to claim 2, characterized in that: The step S3 further includes the following sub-step: using high-pressure air to blow out debris in the hollow rod.

6. The device and method for detecting damage of a disc-type scaffold based on a pneumatic acoustic wave method according to claim 2, characterized in that: The step S5 further comprises the following sub-steps: dividing the signal into multiple time windows, the length of each time window being Δ t , Δ t It can be adjusted; analyze the frequency and amplitude characteristics of the signal in each time window, and identify the characteristic signals related to the damage by comparing the changes in the signals in different time windows.

Images