Lifting control system and method of scaffold based on load feedback

Abstract

The invention relates to the technical field of scaffolds, in particular to a scaffold lifting control system based on load feedback and a method thereof.The scaffold lifting control system comprises a load sensor installed at a key part of a scaffold and used for monitoring the load change of the scaffold in real time, a data acquisition module connected with the load sensor and used for acquiring a load signal and converting the load signal into a digital signal; the control unit is connected with the data acquisition module and used for receiving and processing the digital signal, judging the current load state according to a preset safe load range and generating a control instruction based on a judgment result, and the electric hoist is connected with the control unit and used for receiving the control instruction and adjusting the lifting speed of the electric hoist according to the instruction. By accurately deploying a load sensor at a key mechanical node, two-dimensional source monitoring of lifting force and supporting reaction force is achieved, and the operation state of the electric hoist is dynamically adjusted through a control unit according to real-time load data.

Description

Technical Field

[0001] This invention relates to the field of scaffolding technology, specifically to a lifting control system and method for load feedback scaffolding. Background Technology

[0002] Scaffolding is a temporary support structure erected for building construction. It is composed of materials such as steel pipes, fasteners, and wooden boards, providing workers with operating platforms and material access, and ensuring the safety of working at heights. According to the structure, it can be divided into various forms such as portal frame, cup-lock, and cantilever, which can adapt to the needs of different construction scenarios. It is erected layer by layer as the project progresses and dismantled after completion. It has the characteristics of being temporary and reusable, and is a key facility to ensure construction efficiency and personnel safety.

[0003] In modern high-rise building construction, lifting scaffolding is used. By setting up attachment support points on the building structure in advance, the entire scaffolding is raised and lowered vertically along the exterior wall using electric or hydraulic lifting devices. This allows it to rise or fall layer by layer as the construction progresses. Compared with traditional ground scaffolding, lifting scaffolding does not require multiple disassembly and assembly, which can significantly save labor and material turnover time. It is especially suitable for exterior wall work of high-rise and super high-rise buildings.

[0004] However, in actual lifting operations, the scaffolding lifting control system lacks real-time and accurate load feedback and adaptive control capabilities, making it difficult to dynamically identify load anomalies and respond quickly during the lifting process. When uneven load distribution, structural stress changes, or asynchronous lifting occur during scaffolding lifting, it can easily lead to load concentration or local overload, which in turn can cause scaffolding structural deformation and asynchronous lifting, or even safety accidents. Therefore, a lifting control system and method based on load feedback scaffolding are proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting control system and method for load feedback scaffolding to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A load feedback-based scaffolding lifting control system and method includes: a load sensor installed at key parts of the scaffolding for real-time monitoring of load changes; a data acquisition module connected to the load sensor for acquiring load signals and converting them into digital signals; a control unit connected to the data acquisition module for receiving and processing the digital signals, determining the current load state based on a preset safe load range, and generating control commands based on the determination results; an electric hoist connected to the control unit for receiving the control commands and adjusting its lifting speed according to the commands; an alarm device connected to the control unit for issuing an alarm signal when the load exceeds the safe range; and a communication module connected to the control unit for transmitting load data to a remote monitoring platform in real time.

[0008] As a further optimization of the present invention, the load sensor is installed at the lifting point and the attachment support of the electric hoist to monitor the load at the lifting point and the force on the support, respectively.

[0009] As a further optimization of the present invention, the control unit includes a load judgment module and a speed adjustment module; the load judgment module is used to determine whether the current load is within the preset safe load range; the speed adjustment module is used to automatically adjust the lifting speed of the electric hoist according to the result of the load judgment module.

[0010] As a further optimization of the present invention, the preset safe load range includes the upper limit of the operating load and the upper limit of the lifting load; the upper limit of the operating load is 3kN / m²; the upper limit of the lifting load is 0.5kN / m².

[0011] As a further optimization of the present invention, the alarm device includes an audible and visual alarm for issuing an audible and visual alarm signal when the load exceeds the safe range; the communication module transmits load data to a remote monitoring platform in real time via a wireless network, and the remote monitoring platform includes a mobile phone or computer terminal.

[0012] The control method for the lifting control system of load feedback scaffolding includes: real-time monitoring of load changes of the scaffolding through the load sensor; the data acquisition module acquiring load signals and converting them into digital signals; the control unit receiving load data and determining whether the current load is within the safe range according to the preset safe load range, and the control unit outputting corresponding control commands to the electric hoist according to the determination result to adjust its lifting speed; and transmitting the load data to the remote monitoring platform in real time through the communication module.

[0013] As a further optimization of the present invention, the control commands include normal speed operation commands, deceleration operation commands, and stop operation commands.

[0014] As a further optimization of the present invention, the control unit outputs corresponding control commands to the electric hoist according to the judgment result, including: if the load is within the safe range, controlling the electric hoist to run at normal speed; if the load is close to the upper limit but does not exceed the safe upper limit, controlling the electric hoist to run at reduced speed; if the load exceeds the safe upper limit, controlling the electric hoist to stop running and triggering the alarm device.

[0015] As a further optimization of the present invention, the control unit controls the electric hoists corresponding to each scaffolding lifting point to perform pre-tightening operations in sequence after the system is started. The load sensor collects the load data of the corresponding lifting point in real time and transmits it to the control unit. When the load of any lifting point reaches the preset load threshold, the control unit controls the electric hoist of that lifting point to stop pre-tightening. After all lifting points have completed pre-tightening and the load is stable within the preset load threshold range, the subsequent lifting control process is executed.

[0016] As a further optimization of this invention, the specific method for controlling the operation of the electric hoist is as follows: The currently collected scaffold load is set to... The preset safe load limit is The safety factor is The normal operating speed of the electric hoist is The electric hoist operates at a reduced speed of [speed value missing]. The speed reduction coefficient of the electric hoist is ,in, , Load judgment and speed adjustment satisfy the following formula: when At this time, the control unit outputs a normal speed operation command, and the electric hoist operates at a certain speed. ;when At that time, the control unit outputs a speed reduction command, and the electric hoist's operating speed... ;when When this occurs, the control unit outputs a stop operation command and triggers the alarm device to start.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, by precisely deploying load sensors at key mechanical nodes, dual-dimensional source monitoring of lifting force and support reaction force is achieved. The control unit dynamically adjusts the operating status of the electric hoist based on real-time load data. When the load approaches the safety limit, the speed is automatically reduced to avoid local overload caused by continuous load accumulation. When the load exceeds the safety limit, the machine is stopped immediately, cutting off the risk evolution path from the execution level. At the same time, the system adds a pre-tightening operation for each lifting point before the lifting process starts. The pre-tightening degree of each lifting point is controlled by a preset load threshold to ensure that the force on each lifting point is uniform and completely eliminate the hidden danger of local over-tightening or under-tightening caused by synchronous pre-tightening.

[0019] 2. This invention breaks through the limitations of mechanical operation and manual management in traditional lifting scaffolding control systems, enabling a shift from "human monitoring of the site" to "data monitoring of the site" and from "experience-based decision-making" to "data-based decision-making." This significantly reduces the number of on-site safety officers required, lowers manual management costs, and significantly improves the accuracy of scaffolding lifting control system management.

[0020] 3. In this invention, all data such as peak load, alarm records, and handling measures are automatically stored to form electronic archives and complete data ledgers. These data can serve as proof of compliance in the construction process, and can also be used to accurately locate the cause by tracing back the data after a safety hazard or accident. Furthermore, after the accumulation and analysis of this massive amount of data, a big data model of scaffold load changes can be constructed to identify the load fluctuation patterns under different working conditions and different climate conditions, providing a scientific basis for the design optimization and risk prediction of future projects. Attached Figure Description

[0021] Figure 1 This is a diagram of the lifting control system architecture of the present invention;

[0022] Figure 2 This is a schematic diagram showing the installation position of the load sensor of the present invention. Detailed Implementation

[0023] Please see Figures 1-2 The present invention provides a technical solution:

[0024] A load feedback-based scaffolding lifting control system and method includes: a load sensor installed at key parts of the scaffolding for real-time monitoring of load changes; a data acquisition module connected to the load sensor for acquiring load signals and converting them into digital signals; a control unit connected to the data acquisition module for receiving and processing digital signals, determining the current load state based on a preset safe load range, and generating control commands based on the determination results; an electric hoist connected to the control unit for receiving control commands and adjusting its lifting speed according to the commands; an alarm device connected to the control unit for issuing an alarm signal when the load exceeds the safe range; and a communication module connected to the control unit for transmitting load data to a remote monitoring platform in real time.

[0025] As a further implementation of this solution, load sensors are installed at the lifting points and attachment supports of the electric hoist to monitor the load at the lifting points and the stress on the supports, respectively. By selectively installing the load sensors at the lifting points and attachment supports of the electric hoist, rather than randomly arranging them throughout the scaffolding, accurate load data can be obtained from both the source of force transmission and key nodes of structural stability, providing core data support for safety control, intelligent adjustment, and risk warning during the lifting process.

[0026] As a further implementation of this solution, the control unit includes a load judgment module and a speed adjustment module. The load judgment module is used to determine whether the current load is within the preset safe load range. The speed adjustment module is used to automatically adjust the lifting speed of the electric hoist based on the result of the load judgment module. The preset safe load range includes the upper limit of the operating load and the upper limit of the lifting load. The upper limit of the operating load is 3kN / m², and the upper limit of the lifting load is 0.5kN / m². By decomposing the control unit into two functionally independent but collaborative sub-modules, the load judgment module and the speed adjustment module, the hierarchical, responsible, and precise operation of the control logic can be achieved. This not only improves the response efficiency and control accuracy of the lifting control system, but also significantly enhances the stability, maintainability, and scalability of the system.

[0027] As a further implementation of this solution, the alarm device includes an audible and visual alarm, used to issue audible and visual alarm signals when the load exceeds the safe range; the communication module transmits load data to a remote monitoring platform in real time via a wireless network. The remote monitoring platform includes a mobile phone or computer terminal. Construction sites generally suffer from problems such as high noise levels, dust, dispersed personnel, and obstructed visibility. A single audible alarm is easily masked by the roar of construction machinery, and a single visual alarm is easily blocked by dust or obstacles, making it impossible for construction personnel to detect potential hazards in a timely manner. The designed audible and visual alarm adopts a dual alarm mode of "sound + light," which can be superimposed with dual signals. In addition, to ensure that construction workers and safety officers around and far from the scaffold can detect load abnormalities immediately, the communication module transmits load data to a remote monitoring platform composed of mobile phones and computer terminals via wireless network. This upgrades scaffold safety management from on-site manual monitoring to remote intelligent monitoring. The remote monitoring platform can automatically store load data for the entire construction cycle of the scaffold, including load peaks, alarm times, and handling measures under various working conditions, forming a complete data ledger. This data can serve as proof of compliance during the construction process and can also be used to accurately locate the cause by tracing back the data after a safety hazard or accident occurs.

[0028] The control method of the lifting control system for load feedback scaffolding includes: real-time monitoring of load changes of the scaffolding through load sensors; data acquisition module acquiring load signals and converting them into digital signals; control unit receiving load data and determining whether the current load is within the safe range according to the preset safe load range, and the control unit outputting corresponding control commands to the electric hoist to adjust its lifting speed according to the judgment result; and transmitting the load data to the remote monitoring platform in real time through the communication module.

[0029] As a further implementation of this plan, the control commands include normal speed operation commands, speed reduction operation commands, and stop operation commands.

[0030] As a further implementation of this solution, the control unit outputs corresponding control commands to the electric hoist based on the judgment result, including: if the load is within the safe range, controlling the electric hoist to run at normal speed; if the load is close to the upper limit but does not exceed the safe upper limit, controlling the electric hoist to run at reduced speed; if the load exceeds the safe upper limit, controlling the electric hoist to stop running and triggering the alarm device, thus constructing a three-level stepped control logic to accurately match the safety requirements, avoid meaningless speed reduction, reduce mechanical wear of equipment, and improve lifting operation efficiency.

[0031] As a further implementation of this solution, after the system starts, the control unit controls the electric hoists corresponding to each scaffolding lifting point to perform pre-tightening operations in sequence. The load sensor collects the load data of the corresponding lifting point in real time and transmits it to the control unit. When the load of any lifting point reaches the preset load threshold, the control unit controls the electric hoist of that lifting point to stop pre-tightening. After all lifting points have completed pre-tightening and the load has stabilized within the preset load threshold range, the subsequent lifting control process is executed. Before the lifting control process is executed, the sequential pre-tightening control strategy can achieve uniform force distribution at each lifting point and eliminate the hidden dangers of local over-tightening or under-tightening. At the same time, the preset load threshold can be scientifically set in combination with the structural design parameters of the scaffolding, which fundamentally solves the problem of force imbalance in synchronous pre-tightening.

[0032] As a further implementation of this plan, the specific method for controlling the operation of the electric hoist is as follows: Set the currently collected scaffold load to... The preset safe load limit is The safety factor is The normal operating speed of the electric hoist is The electric hoist operates at a reduced speed of [speed value missing]. The speed reduction coefficient of the electric hoist is ,in, , Load judgment and speed adjustment satisfy the following formula: when At this time, the control unit outputs a normal speed operation command, and the electric hoist operates at a certain speed. ;when At that time, the control unit outputs a speed reduction command, and the electric hoist's operating speed... ;when When this occurs, the control unit outputs a stop operation command and triggers the alarm device to start.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A lifting control system for load feedback scaffolding, characterized in that, include: The load sensor is installed at key parts of the scaffolding to monitor load changes in the scaffolding in real time. The data acquisition module is connected to the load sensor and is used to acquire load signals and convert them into digital signals; The control unit is connected to the data acquisition module and is used to receive and process the digital signals, determine the current load state according to the preset safe load range, and generate control commands based on the determination results. The electric hoist is connected to the control unit, which is used to receive the control commands and adjust its lifting speed according to the commands; The alarm device is connected to the control unit and is used to issue an alarm signal when the load exceeds the safe range; The communication module is connected to the control unit and is used to transmit load data to the remote monitoring platform in real time.

2. The lifting control system for load feedback scaffolding according to claim 1, characterized in that: The load sensors are installed at the lifting point and the attachment support of the electric hoist to monitor the load at the lifting point and the stress on the support, respectively.

3. The lifting control system for load feedback scaffolding according to claim 1, characterized in that: The control unit includes a load determination module and a speed adjustment module; The load determination module is used to determine whether the current load is within the preset safe load range; The speed adjustment module is used to automatically adjust the lifting speed of the electric hoist based on the result of the load judgment module.

4. The lifting control system for load feedback scaffolding according to claim 1 or 3, characterized in that: The preset safe load range includes the upper limit of the load under operating conditions and the upper limit of the load under lifting conditions; The upper limit of the operating load is 3kN / m². The upper limit of the load for the lifting operation is 0.5 kN / m².

5. The lifting control system for load feedback scaffolding according to claim 1, characterized in that: The alarm device includes an audible and visual alarm, used to issue an audible and visual alarm signal when the load exceeds the safe range; The communication module transmits load data to a remote monitoring platform in real time via a wireless network. The remote monitoring platform includes a mobile phone or computer terminal.

6. A control method for a lifting control system of load feedback scaffolding, characterized in that, Applied to the system as described in any one of claims 1-5, the method includes: monitoring load changes on the scaffold in real time using the load sensor; The data acquisition module acquires load signals and converts them into digital signals; The control unit receives load data and determines whether the current load is within the safe range based on the preset safe load range. The control unit then outputs corresponding control commands to the electric hoist based on the determination result to adjust its lifting speed. The load data is transmitted to the remote monitoring platform in real time through the communication module.

7. The control method for the lifting control system of load feedback scaffolding according to claim 6, characterized in that: The control commands include normal speed operation commands, speed reduction operation commands, and stop operation commands.

8. The control method for the lifting control system of load feedback scaffolding according to claim 6, characterized in that: The control unit outputs corresponding control commands to the electric hoist based on the judgment result, including: If the load is within a safe range, control the electric hoist to run at a normal speed; If the load is close to the upper limit but does not exceed the safe load limit, control the electric hoist to run at a reduced speed. If the load exceeds the safe load limit, the electric hoist will stop running and the alarm device will be triggered.

9. The control method for the lifting control system of the scaffolding based on load feedback according to claim 6, characterized in that: After the system is started, the control unit controls the electric hoists corresponding to each scaffolding lifting point to perform pre-tightening operations in sequence. The load sensor collects the load data of the corresponding lifting point in real time and transmits it to the control unit. When the load of any lifting point reaches the preset load threshold, the control unit controls the electric hoist of that lifting point to stop pre-tightening. After all lifting points have completed pre-tightening and the load is stable within the preset load threshold range, the subsequent lifting control process is executed.

10. The control method for the lifting control system of load feedback scaffolding according to claim 8, characterized in that: The specific method for controlling the operation of the electric hoist is as follows: Set the currently collected scaffold load as... The preset safe load limit is The safety factor is The normal operating speed of the electric hoist is The electric hoist operates at a reduced speed of [speed value missing]. The speed reduction coefficient of the electric hoist is ,in, , ; Load determination and speed adjustment satisfy the following formula: when At this time, the control unit outputs a normal speed operation command, and the electric hoist operates at a certain speed. ; when At that time, the control unit outputs a speed reduction command, and the electric hoist's operating speed... ; when When this occurs, the control unit outputs a stop operation command and triggers the alarm device to start.

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