Telescopic boom aerial work platform with lifting function and control method thereof

Abstract

The application belongs to the technical field of aerial work equipment and hoisting technology, and provides a telescopic boom aerial work truck with hoisting function and a control method thereof, which comprises a mobile bearing mechanism, a work execution mechanism, an aerial work mechanism, a hoisting work mechanism, a sensing assembly and a controller, the work execution mechanism is installed on the mobile bearing mechanism, and the work execution mechanism is connected with the aerial work mechanism; the work execution mechanism is connected with the hoisting work mechanism; the sensing assembly is installed on the work execution mechanism, the aerial work mechanism and the hoisting work mechanism respectively and monitors and detects the states of the mechanisms respectively, and transmits the monitoring results to the controller; the controller is used for adjusting the actions of the work execution mechanism, the aerial work mechanism and the hoisting work mechanism according to the monitoring results. The application can realize automatic switching control of two working modes of aerial work and hoisting work, avoid non-standard operation, effectively improve hoisting performance and ensure the safety of aerial work and hoisting work.

Description

Technical Field

[0001] This application relates to the field of aerial work equipment and lifting technology, and in particular to a telescopic boom aerial work vehicle with lifting function and its control method. Background Technology

[0002] Aerial work platforms, as specialized vehicles for carrying personnel to perform high-altitude operations, have gradually replaced traditional, more dangerous climbing methods. With urban development, these vehicles not only need to meet the needs of personnel working at heights but also require lifting operations without personnel on board. Integrating lifting functions into aerial work platforms would significantly improve equipment utilization and economic efficiency. Currently, vehicle-mounted aerial work platforms with lifting capabilities are mainly divided into three categories: folding boom with lifting function, work bucket with lifting device, and telescopic boom with lifting function.

[0003] However, most existing aerial work platforms with lifting capabilities only use lifting as an auxiliary device. Their lifting capacity is typically small, and they lack sensors and automatic control programs, making real-time control of lifting capacity and working radius impossible, relying mainly on manual judgment. This approach easily leads to overloading or machine instability and overturning, resulting in high operational risks. Furthermore, due to the special safety requirements of manned aerial work, the structural and overall stability safety factors are usually high—the structural safety factor is generally no less than 2.75 for manned operations, and the overall stability coefficient is generally between 1.2 and 1.5. In contrast, the safety standard for pure lifting operations is lower: the structural safety factor is usually no less than 1.34. According to the formula: [σ] = (0.5σs + 0.35σb) / n, the larger n is, the lower the allowable stress and the smaller the lifting capacity. In lifting operation mode, the overall stability coefficient is approximately 1.1. If the ability to identify and switch between different operation modes could be achieved, lifting performance would be effectively improved. However, most existing systems fail to automatically distinguish between operating modes and are still designed with a high safety factor, which greatly limits their lifting capacity.

[0004] From a mechanical performance perspective, the anti-overturning ability of a crane during lifting operations is closely related to its center of gravity position. (See attached image) Figure 1 As shown, the overturning moment can be expressed as M1×L1 + M2×L2, while the anti-overturning moment is M3×L3. L3 represents the anti-overturning arm; a larger value indicates better overall stability. Currently, common lifting mechanisms (such as variable-amplitude double cylinders and built-in winches) are mostly installed inside or to the side of the turntable, resulting in a smaller L3 and limiting the overall anti-overturning performance of the machine.

[0005] In summary, current aerial work platforms with lifting capabilities still suffer from problems such as low automation, insufficient safety protection, limited lifting capacity, and unsatisfactory overall stability. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a telescopic boom aerial work platform with lifting function and its control method. It can automatically switch between two working modes: aerial work and lifting operation, avoiding improper operation and effectively improving lifting performance, thus ensuring the safety of both aerial work and lifting operations.

[0007] To achieve the above and related objectives, the present invention employs the following technical means:

[0008] The first aspect of this invention provides a telescopic boom aerial work platform with lifting function, comprising a mobile load-bearing mechanism, a work execution mechanism, an aerial work mechanism, a lifting work mechanism, sensing components, and a controller. The work execution mechanism is mounted on the mobile load-bearing mechanism and is connected to the aerial work mechanism, providing the aerial work mechanism with working height and working radius. The work execution mechanism is connected to the lifting work mechanism and provides the lifting work mechanism with guidance, working height, and working radius. The sensing components are respectively mounted on the work execution mechanism, the aerial work mechanism, and the lifting work mechanism and monitor the status of each mechanism, transmitting the monitoring results to the controller. The controller is used to adjust the actions of the work execution mechanism, the aerial work mechanism, and the lifting work mechanism according to the monitoring results.

[0009] Furthermore, the mobile support mechanism includes a chassis, a subframe mounted on the chassis, and retractable outriggers mounted in the subframe; when the work actuator is in operation, the outriggers extend from the subframe and support the ground.

[0010] Furthermore, the operating mechanism includes a turntable, a hoisting and winch mechanism and counterweight centrally arranged behind the turntable, a multi-stage telescopic boom mounted on the turntable via a luffing cylinder, and a guide mechanism mounted on the turntable and offset from the hoisting and winch mechanism, which provides guidance for the lifting operation mechanism.

[0011] Furthermore, the luffing cylinder is a single cylinder and is hinged inside the turntable.

[0012] Furthermore, the sensing components include a load cell, a tension sensor, a length sensor, and an angle sensor.

[0013] A second aspect of the present invention provides a control method for a telescopic boom aerial work platform with lifting function, which is used to control the aforementioned telescopic boom aerial work platform, comprising the following steps:

[0014] Step S100: Monitor the load status of the aerial work platform in real time;

[0015] Step S200: When no load signal is detected, the working mode of the aerial work platform is the lifting operation mode, and the lifting operation control strategy is executed. The lifting operation control strategy includes releasing the tension limit and restricting the movement of the work platform.

[0016] Step S300: When a load signal is detected, switch the working mode of the aerial work vehicle to the aerial work mode and execute the aerial work control strategy. The aerial work control strategy includes limiting the lifting winch follow-up load. When the load exceeds the safety threshold, activate the alarm and limit the action.

[0017] Step S400: Monitor the telescopic boom's operating range in real time. When the working mode is the lifting operation mode, call the first lifting mode curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding first safety load protection. When the working mode is the aerial work mode, call the second aerial work vehicle curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding second safety load protection.

[0018] Furthermore, in step S300, the safety threshold is the reference tension value of the wire rope in the empty hook state of the hoisting mechanism of the aerial work platform.

[0019] Furthermore, in step S400, the telescopic boom's working range includes the lifting height and a first working range determined based on the boom length, luffing angle, and slewing direction angle.

[0020] Furthermore, in step S400, the first safe load protection includes triggering an alarm and limiting or stopping the lifting action when the comparison result exceeds the first safe value defined by the first lifting mode curve.

[0021] Furthermore, in step S400, the second safety load protection includes triggering an alarm and limiting or stopping the boom movement when the comparison result exceeds the second safety value defined by the second aerial work platform curve, and the second safety value is less than the first safety value.

[0022] The beneficial technical effects of this invention are as follows:

[0023] This invention integrates aerial work and lifting functions into one unit. Through a multi-stage telescopic boom and lifting winch mechanism, it realizes both personnel aerial work and material hoisting functions, expanding the application range of aerial work vehicles and making them suitable for a variety of complex scenarios.

[0024] This invention can intelligently identify and switch the working modes of the aerial work platform. When no load signal is detected, the default working mode is the lifting operation mode. When a load signal is detected, the working mode is automatically switched to the aerial work mode, and the corresponding control strategy is executed synchronously to achieve differentiated control and ensure safety. In the aerial work mode, the purpose of the aerial work control strategy is to ensure the safety of personnel on the platform; therefore, the lifting function is strictly limited in this mode. In the lifting operation mode, the purpose of the lifting operation control strategy is to achieve efficient cargo lifting; therefore, in this mode, functions such as platform rotation are restricted to prevent misoperation; and the tension limit is lifted to allow lifting and lowering operations with load. In addition, this invention monitors the telescopic boom's operating range in real time and executes corresponding safety load protection in different working modes to prevent tipping and further improve safety.

[0025] This invention optimizes the lifting performance of aerial work platforms by rear-mounting the counterweight and improving the structural layout. It also addresses the limitation of traditional single-use aerial work platforms. Through the linkage of the work execution mechanism, aerial work mechanism, lifting mechanism, sensing components, and controller, the working mode can be switched, and the safety issues when two working modes coexist can be resolved.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0027] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of an existing aerial work platform vehicle.

[0029] Figure 2 This is a flowchart of the control method for the telescopic boom aerial work platform with lifting function in this application;

[0030] Figure 3 This is a schematic diagram of the telescopic boom aerial work platform with lifting function in this application.

[0031] Figure 4 This is a schematic diagram of the telescopic boom aerial work platform with lifting function in this application.

[0032] Figure 5 This is the amplitude control curve diagram when the aerial work platform vehicle of this application is in lifting operation mode.

[0033] Figure Labels

[0034] 1: Chassis; 2: Subframe; 3: Controller; 4: Counterweight; 5: Concealed outriggers; 6: Lifting winch mechanism; 7: Turntable; 8: Guide mechanism; 9: Multi-stage telescopic boom; 10: Luffing cylinder; 11: Platform; 12: Weighing sensor; 13: Bracket; 14: Lifting device; 15: Tension sensor; 16: Hook. Detailed Implementation

[0035] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0036] like Figure 3 and Figure 4 As shown, the present invention provides a telescopic boom aerial work platform with lifting function, including a mobile load-bearing mechanism, a work execution mechanism, an aerial work mechanism, a lifting work mechanism, sensing components, and a controller 3. The work execution mechanism is mounted on the mobile load-bearing mechanism and is connected to the aerial work mechanism, providing the aerial work mechanism with working height and working radius. The work execution mechanism is connected to the lifting work mechanism and provides the lifting work mechanism with guidance, working height, and working radius. The sensing components are respectively mounted on the work execution mechanism, the aerial work mechanism, and the lifting work mechanism and monitor the status of each mechanism, transmitting the monitoring results to the controller 3. The controller 3 is used to adjust the actions of the work execution mechanism, the aerial work mechanism, and the lifting work mechanism according to the monitoring results.

[0037] Furthermore, the mobile support mechanism of this application includes a chassis 1, a subframe 2 mounted on the chassis 1, and retractable outriggers 5 mounted in the subframe 2. When the work actuator is in operation, the retractable outriggers 5 extend from the subframe 2 and support the ground. This application provides mobility through the chassis 1 (wheels), while the retractable outriggers 5 are mounted in the housing of the subframe 2 through internal cylinders and a telescopic system. During operation, the retractable outriggers 5 extend to support the entire machine, ensuring operational stability.

[0038] Furthermore, the operating mechanism of this application includes a turntable 7, a hoisting and winch mechanism 6 and a counterweight 4 centrally arranged behind the turntable 7, a multi-stage telescopic boom 9 mounted on the turntable 7 via a luffing cylinder 10, and a guide mechanism 8 mounted on the turntable 7 and offset from the hoisting and winch mechanism 6, which provides guidance for the lifting operation mechanism. Even further, the turntable 7 is mounted on the subframe 2 via a slewing device, and the hoisting and winch mechanism 6 and the counterweight 4 are centrally arranged behind the turntable 7. This arrangement maximizes the use of existing space and uses the counterweight 4 to balance the overturning moment generated by the forward-extending boom and load, thereby improving the overall lifting capacity, platform load capacity, and stability of the machine.

[0039] Furthermore, this application includes a guide mechanism 8 installed above the turntable 7, below the multi-stage telescopic boom 9, and at its head for wire rope routing. To ensure proper rope routing, the hoisting winch mechanism 6 and guide mechanism 8 behind the turntable 7 are offset to change the transmission direction of the wire rope, guiding the tension generated by the hoisting winch structure to the hook 16 or platform 11 at the end of the boom. This ensures that the wire rope can be smoothly and orderly extended and retracted during the extension and luffing of the multi-stage telescopic boom 9, preventing rope tangling, friction, or interference.

[0040] Furthermore, the multi-stage telescopic boom 9 of this application includes three or more stages of telescopic boom, such as a six-section telescopic boom, a three-section telescopic boom, a four-section telescopic boom, a five-section telescopic boom, a seven-section telescopic boom, and so on.

[0041] Furthermore, the luffing cylinder 10 in this application is a single cylinder and is hinged inside the turntable 7. By using a single-cylinder luffing mechanism for the entire machine, and arranging the hoisting winch mechanism 6 behind the turntable 7, the lifting stability can be effectively improved. A hoisting counterweight 4 can also be optionally added to further enhance the lifting capacity.

[0042] Furthermore, the aerial work platform of this application includes a bracket 13 and a platform 11. The bracket 13 is connected to the multi-stage telescopic boom 9, and the platform 11 is connected to the multi-stage telescopic boom 9 through the bracket 13. The platform 11 can rotate ±90° relative to the bracket 13.

[0043] Furthermore, the lifting mechanism of this application includes a lifting device 14 and a hook 16. The lifting device 14 is mounted on the multi-stage telescopic boom 9, and the hook 16 is connected to the lifting device 14 by a winch wire rope.

[0044] Furthermore, when performing high-altitude operations, platform 11 is installed at the end of the multi-stage telescopic boom 9. By extending and retracting the multi-stage telescopic boom 9, the distance from platform 11 to the center of rotation can be changed, i.e., the working radius; by changing the boom elevation angle through the luffing cylinder 10, the height of platform 11 can be changed, i.e., the working height; by rotating the turntable 7, platform 11 can achieve 360° rotation in the horizontal plane, thereby reaching the designated working point. When performing lifting operations, such as... Figure 5 As shown, the hoisting winch mechanism 6 is installed on the thickness of the turntable 7, while the hook 16 is led out from the end of the boom via a wire rope. At this time, the multi-stage telescopic boom 9 forms a guide structure, providing a stable movement path for the wire rope and the hook 16, preventing the load from swaying in the air. By extending and retracting the multi-stage telescopic boom 9 and the action of the luffing cylinder 10, the position of the hook 16 in the air, i.e., the working height and working amplitude, can be controlled.

[0045] Furthermore, the sensing components of this application include a load cell 12, a tension sensor 15, a length sensor, and an angle sensor. The load cell 12 is mounted on the platform 11 for load detection, thereby facilitating the controller 3's determination of the working mode. The tension sensor 15 is mounted on the lifting mechanism for detecting the tension of the wire rope, and thus detecting the total lifting capacity. The length sensor and angle sensor are mounted on the aerial work platform to detect the working angle and stroke of the multi-stage telescopic boom 9, thereby detecting the working radius and lifting height.

[0046] Furthermore, the controller 3 of this application automatically determines whether the aerial work platform is currently in aerial work mode (with load) or lifting work mode (without load) based on the load signal from the weighing sensor 12, and adjusts the control strategy and safety load protection corresponding to the working mode. The controller 3 calculates the current working radius and working height in real time based on the boom length, angle, and slewing angle obtained from the length sensor and angle sensor. Combined with the load data from the weighing sensor 12 and the tension sensor 15, it calculates the load value of the entire vehicle and compares it with the first lifting mode curve and the second aerial work platform curve stored in the controller 3. If the load at the current working radius exceeds the first safety value, an alarm is triggered, and lifting, boom extension, and other actions are restricted or stopped. If the load at the current working radius exceeds the second safety value, an alarm is triggered, and boom actions are strictly restricted or stopped.

[0047] Furthermore, this application optimizes the structure and layout of the aerial work platform by placing the counterweight 4 at the rear, thereby improving lifting performance and overcoming the limitation of traditional work platforms being used only once. Through the linkage of the work execution mechanism, the aerial work mechanism, the lifting mechanism, the sensing components, and the controller 3, the working mode can be switched, and the safety issues when the two working modes coexist can be resolved.

[0048] Please see Figure 2 The above is a flowchart of the control method for a telescopic boom aerial work platform with lifting function according to this application. The method is used to control the telescopic boom aerial work platform, and is described in detail below:

[0049] Step S100: Monitor the load status of the aerial work platform in real time.

[0050] Specifically, this application monitors the load status of the work platform in real time using a weighing sensor installed on the work platform.

[0051] Step S200: When no load signal is detected, the working mode of the aerial work platform is the lifting operation mode, and the lifting operation control strategy is executed. The lifting operation control strategy includes releasing the tension limit and restricting the movement of the work platform.

[0052] Specifically, when the aerial work platform is in the retracted state, the platform is unloaded, and the default operating mode is the lifting operation mode. In this mode, based on the lifting operation control strategy, the tension limit on the wire rope of the hoisting winch mechanism is released, allowing the hoisting winch mechanism to perform lifting and load-bearing actions and output greater traction force to meet the power required for lifting heavy objects and ensure the smooth progress of lifting operations. Furthermore, in this mode, certain actions of the platform are restricted or prohibited, including but not limited to limiting platform rotation to prevent the load from swaying during lifting, which could affect the accuracy and safety of the lifting; and limiting boom movements, such as extension, luffing, and slewing, to ensure the stability of the aerial work platform during lifting and prevent tipping.

[0053] Step S300: When a load signal is detected, switch the working mode of the aerial work vehicle to the aerial work mode and execute the aerial work control strategy. The aerial work control strategy includes limiting the lifting winch follow-up load. When the load exceeds the safety threshold, activate the alarm and restrict the action.

[0054] Specifically, when personnel enter the work platform, a load signal is detected, and the working mode is automatically switched to the high-altitude work mode. In this mode, based on the high-altitude work control strategy, the safety threshold is set to the reference tension value of the wire rope in the empty hook state of the hoisting winch of the aerial work vehicle. At this time, only the wire rope is allowed to bear the weight of the hook itself. Once the tension sensor detects any tension exceeding the safety threshold, an alarm will be triggered immediately, and dangerous actions will be restricted or stopped, such as restricting the hoisting action of the hoisting winch.

[0055] Step S400: Monitor the telescopic boom's operating range in real time. When the working mode is the lifting operation mode, call the first lifting mode curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding first safety load protection. When the working mode is the aerial work mode, call the second aerial work vehicle curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding second safety load protection.

[0056] Specifically, the telescopic boom's working radius includes the lifting height and a first working radius determined based on the boom length, luffing angle, and slewing angle. This application can detect the boom length, luffing angle, and slewing angle of the telescopic boom using length sensors and angle sensors to calculate the current first working radius in real time, and obtain the lifting height through the sensors.

[0057] Specifically, the first safe load protection includes triggering an alarm and limiting or stopping the lifting action when the comparison result exceeds the first safe value defined by the first lifting mode curve. The first lifting mode curve in this application is the envelope of the maximum weight that the aerial work platform vehicle is allowed to lift at different working angles during lifting operations. The first lifting mode curve defines the maximum weight that can be lifted based on its structural strength and overall stability at different working angles, i.e., the first safe value. If the load at the current working angle exceeds the first safe value, an alarm is triggered, and lifting, boom extension, and other actions are limited or stopped.

[0058] Specifically, the second safety load protection includes triggering an alarm and limiting or stopping boom movement when the comparison result exceeds the second safety value defined by the second aerial work platform curve. Furthermore, the second safety value is less than the first safety value. The second aerial work platform curve in this application is a load limit curve set by the aerial work platform at different working ranges under aerial work mode, and is far below the lifting capacity, to ensure the safety of personnel on the platform. The second aerial work platform curve defines the allowable load value at the working range, i.e., the second safety value, which is far less than the first safety value to reserve a safety margin. If the load at the current working range exceeds the second safety value, an alarm is triggered, strictly limiting or stopping boom movement.

[0059] Specifically, this application monitors the working range and load in real time and compares them with safety values. It can proactively issue warnings and intervene in the operation before the load condition of the aerial work platform approaches or reaches the dangerous critical point, thus forming a proactive and preventive safety line and fundamentally preventing equipment overturning due to overloading.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A control method for a telescopic boom aerial work platform with lifting function, characterized in that, The method is used to control the telescopic boom aerial work platform with lifting function, and includes the following steps: Step S100: Monitor the load status of the aerial work platform in real time; Step S200: When no load signal is detected, the working mode of the aerial work vehicle is the lifting operation mode, and the lifting operation control strategy is executed. The lifting operation control strategy includes releasing the tension limit on the wire rope of the lifting winch mechanism and restricting the movement of the work platform. Step S300: When a load signal is detected, the working mode of the aerial work vehicle is switched to the aerial work mode, and the aerial work control strategy is executed. The aerial work control strategy includes limiting the lifting winch follow-up load. When the load exceeds the safety threshold, an alarm is activated and the action is restricted. Step S400: Monitor the telescopic boom's operating range in real time. When the working mode is the lifting operation mode, call the first lifting mode curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding first safety load protection. When the working mode is the aerial work mode, call the second aerial work vehicle curve and compare the monitoring results with it. Based on the comparison results, perform the corresponding second safety load protection. The telescopic boom aerial work platform with lifting function includes a mobile load-bearing mechanism, a work execution mechanism, an aerial work mechanism, a lifting work mechanism, sensing components, and a controller. The work execution mechanism is mounted on the mobile load-bearing mechanism and connected to the aerial work mechanism, providing the aerial work mechanism with working height and working radius. The work execution mechanism is also connected to the lifting work mechanism, providing guidance, working height, and working radius. The sensing components are respectively mounted on the work execution mechanism, the aerial work mechanism, and the lifting work mechanism, monitoring the status of each mechanism and transmitting the monitoring results to the controller. The controller is used to adjust the actions of the work execution mechanism, the aerial work mechanism, and the lifting work mechanism based on the monitoring results. The operating mechanism includes a turntable, a hoisting and winching mechanism and a counterweight centrally arranged behind the turntable, a multi-stage telescopic boom mounted on the turntable via a luffing cylinder, and a guide mechanism mounted on the turntable and offset from the hoisting and winching mechanism, which provides guidance for the lifting operation mechanism.

2. The control method for a telescopic boom aerial work platform according to claim 1, characterized in that, The mobile support mechanism includes a chassis, a subframe mounted on the chassis, and retractable outriggers mounted in the subframe; when the work execution mechanism is in operation, the outriggers extend from the subframe and support the ground.

3. The control method for a telescopic boom aerial work platform according to claim 2, characterized in that, The variable amplitude cylinder is a single cylinder and is hinged inside the turntable.

4. The control method for a telescopic boom aerial work platform according to claim 3, characterized in that, The sensing components include a load cell, a tension cell, a length cell, and an angle cell.

5. The control method for a telescopic boom aerial work platform according to claim 1, characterized in that, In step S300, the safety threshold is the reference tension value of the wire rope in the empty hook state of the hoisting winch mechanism of the aerial work vehicle.

6. The control method for a telescopic boom aerial work platform according to claim 5, characterized in that, In step S400, the telescopic boom's working range includes the lifting height and a first working range determined based on the boom length, luffing angle, and slewing direction angle.

7. The control method for a telescopic boom aerial work platform according to claim 6, characterized in that, In step S400, the first safe load protection includes triggering an alarm and limiting or stopping the lifting action when the comparison result exceeds the first safe value defined by the first lifting mode curve.

8. The control method for a telescopic boom aerial work platform according to claim 7, characterized in that, In step S400, the second safety load protection includes triggering an alarm and limiting or stopping the boom movement when the comparison result exceeds the second safety value defined by the second aerial work platform curve, and the second safety value is less than the first safety value.

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