Automatic lifting working ladder suitable for unmanned aerial vehicle and control system

Abstract

The invention belongs to the technical field of unmanned aerial vehicle maintenance equipment, and discloses an automatic lifting working ladder suitable for an unmanned aerial vehicle and a control system.The automatic lifting working ladder suitable for the unmanned aerial vehicle comprises a ladder assembly provided with a fixed ladder body and a movable ladder body, and the fixed ladder body is connected with the movable ladder body; the fixed ladder comprises N first ladders; the movable ladder comprises a movable ladder platform and a driving mechanism I for driving the movable ladder platform to lift; the movable halfpace comprises a fixed ladder part, a movable ladder part and a driving assembly. The working ladder can be freely switched among at least three types of working ladders, for example, free switching among the third-level position, the fourth-level position and the fifth-level position, so that personnel bearing of unmanned aerial vehicles of different types can be met, the situation that a large number of working ladders of different types need to be used is avoided, the management and maintenance cost is reduced, and the working ladder is more convenient and practical.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicle maintenance equipment, and in particular relates to an automatic lifting work ladder and a control system suitable for unmanned aerial vehicles. Background Art

[0002] As the number of drone models increases during field deployment, a large number of three-, four-, and five-level ladders are needed to meet the requirements of maintenance work. A large number of traditional work ladders will have the following technical problems:

[0003] 1. Finished products purchased from the market cannot be replaced

[0004] Due to the confidentiality of the aircraft, its parameters cannot be disclosed to the public, so there are no compatible alternative products on the market.

[0005] 2. Safety hazards

[0006] The contact area at the four corners of traditional three-, four-, and five-step ladders is too small. They are prone to slipping when encountering oil, which can easily cause workers to fall and cause personal injury.

[0007] 3. Inconvenient management

[0008] With the increase in aircraft models, a large number of different types of work ladders are needed. If one model is in production and another model is not, the work ladders used by the unproduced model must be stored in a designated area in the hangar. This not only increases management and maintenance costs, but also occupies work areas and requires designated personnel to manage.

[0009] 4. Inconvenient to use

[0010] The traditional way to move a work ladder is for a worker to lift the frame on one side of the ladder, make the wheels on the other side touch the ground, and then push the ladder to the designated location. The movement requires manual lifting; and each station on the aircraft requires a different type of work ladder. For example, when work is finished at one location and it is necessary to move to another location, the work ladder needs to be replaced. Frequent changes of different work ladders are not only time-consuming and labor-intensive, but also will aggravate the damage of the work ladder.

[0011] Therefore, traditional work ladders have defects such as inconvenient transportation, inconvenient management, safety hazards, and irreplaceable finished products purchased on the market. Summary of the invention

[0012] In view of this, an object of the present invention is to provide an automatic lifting work ladder and a control system suitable for unmanned aerial vehicles, so as to solve the problem that the traditional work ladder cannot be converted into at least two other types of work ladders.

[0013] In order to achieve the above object, the present invention adopts the following technical solutions:

[0014] On the one hand, an automatic lifting work ladder suitable for a drone is provided, comprising a ladder frame provided with a fixed ladder and a movable ladder, wherein the fixed ladder is connected with the movable ladder, the fixed ladder comprises N first steps, and the movable ladder comprises a movable ladder platform and a driving mechanism 1 for driving the movable ladder platform to rise and fall;

[0015] The movable ladder platform comprises a fixed ladder part, a movable ladder part and a driving assembly, wherein the fixed ladder part is lower than the movable ladder part, and the driving assembly drives the movable ladder part to switch between the first working position and the second working position in the horizontal direction, and the fixed ladder part rises and falls with the movable ladder platform to switch between the standby position and the third working position, and the fixed ladder part has a larger step than the fixed ladder part when it is in the third working position;

[0016] When the working ladder has N steps, the movable ladder platform is consistent in height with the fixed ladder, the movable ladder portion is located in the first working position and connected with the fixed ladder, and the fixed ladder portion is located in the standby position; when the working ladder has N+1 steps, the movable ladder platform is one step higher than the fixed ladder, the movable ladder portion is located in the first working position and connected with the fixed ladder, and the fixed ladder portion is located in the standby position; when the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed ladder, the movable ladder portion is in the second working position, and the fixed ladder portion is located in the third working position and connected with the fixed ladder.

[0017] In a possible implementation, the fixed step portion includes a second step, and the second step is one step lower than the movable step portion and one step higher than the fixed step.

[0018] In a possible implementation, the fixed ladder portion includes two second steps of continuous steps, the second step of the higher one of the two second steps is one step lower than the movable ladder portion, and the second step of the lower one is one step higher than the fixed step, and the second step is raised and lowered with the movable ladder platform to be movably switched between the standby position, the third working position and the fourth working position, and the fourth working position is one step higher than the third working position;

[0019] When the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed ladder, the movable ladder portion is located in the second working position, the second step of the two second steps of the fixed ladder portion, the higher one is located in the third working position, and the other second step is located in the standby position; when the working ladder has N+3 steps, the movable ladder platform is three steps higher than the fixed ladder, the movable ladder portion is in the second working position, the second step of the two second steps of the fixed ladder portion, the higher one is located in the fourth working position, and the other second step is in the third working position.

[0020] In a possible implementation, the movable ladder platform further includes a lifting frame driven by the driving mechanism 1 to be lifted and lowered, the movable ladder portion is arranged on the top of the lifting frame, and the fixed ladder portion is arranged on the lifting frame and located between the lifting frame and the fixed ladder.

[0021] In a possible implementation, the movable ladder portion includes a workbench slidably arranged on the top of the lifting frame, and the workbench is driven by a driving component to switch between a first work position and a second work position in a horizontal direction. The length of the workbench is longer than the lifting frame and is longer than the step width of at least one step.

[0022] In a possible implementation, the ladder frame is further provided with a guide frame, the lifting frame is slidably matched with the guide frame, the guide frame is provided with a first handrail, and the ladder frame is provided with a second handrail.

[0023] In a possible implementation, a plurality of universal fulmar wheels are provided at the bottom of the ladder frame;

[0024] And / or, the first step number N of the fixed steps is 3.

[0025] In a possible implementation, the ladder frame is also provided with a battery, a power converter and a controller, the controller is electrically connected to the driving mechanism 1 and the driving assembly, and the battery is electrically connected to the controller via the power converter.

[0026] On the other hand, an automatic lifting work ladder control system is also provided, which is an automatic lifting work ladder suitable for unmanned aerial vehicles based on any of the above technical solutions, including:

[0027] A first acquisition module, used for acquiring the current first position information of the movable platform;

[0028] A second acquisition module is used to acquire the current second position information of the movable ladder section; and

[0029] The control module is used to determine the current step of the working ladder according to the first position information and the second position information, and control the driving mechanism to drive the movable ladder platform to switch from the current position to the working position corresponding to the target step according to the step switching instruction, and / or control the driving component to drive the movable ladder part to switch from the current position to the working position corresponding to the target step.

[0030] In a possible implementation, it also includes a sound and light alarm module and a pressure detection module. The pressure detection module is used to detect the pressure information of the movable ladder part. The control module determines whether the lifting conditions are met based on the equipment information including at least the pressure information. When the lifting conditions are not met, the sound and light alarm module prompts an alarm.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The automatic lifting work ladder and control system suitable for unmanned aerial vehicles of the present invention can add at least two steps on the basis of the fixed ladder through the cooperation of the fixed ladder and the movable ladder of the work ladder, and can realize the free conversion of the work ladder between at least three types of work ladders, such as free switching between the 3rd, 4th and 5th positions, by driving the first driving mechanism to lift and lower the movable ladder platform of the movable ladder and driving the fixed ladder part of the driving component. In this way, the personnel carrying capacity of unmanned aerial vehicles of different models can be met, the need to use a large number of work ladders of different models is avoided, the management and maintenance costs are reduced, and it is more convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A three-dimensional view of an automatic lifting work ladder suitable for a drone at a first viewing angle, wherein the second step in the figure is provided with a;

[0034] Figure 2 A stereoscopic view of an automatic lifting work ladder suitable for a drone under a second viewing angle;

[0035] Figure 3 A side view of an automatic lifting work ladder suitable for drones;

[0036] Figure 4 for Figure 1 The switching principle diagram of the structure shown is switching from 3-step ladder to 5-step ladder;

[0037] Figure 5 It is a structural schematic diagram of another implementation structure of an automatic lifting working ladder suitable for unmanned aerial vehicles;

[0038] Figure 6 for Figure 5 The switching schematic diagram of the structure shown;

[0039] Figure 7 It is a schematic diagram of the control principle of an automatic lifting working ladder suitable for unmanned aerial vehicles;

[0040] Figure 8 The figure is a flow diagram of an automatic lifting work ladder suitable for UAVs.

[0041] In the figure: 1-ladder frame; 11-second handrail; 12-first handrail; 13-universal 150 Foma wheel; 2-fixed ladder; 21-first ladder; 3-movable ladder; 31-movable ladder part; 311-workbench; 32-fixed ladder part; 321-second ladder; 33-driving mechanism 1; 34-lifting frame; 35-driving assembly; 4-guide frame. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0043] Please refer to Figure 1-6 As shown, an embodiment of the present application provides an automatic lifting work ladder suitable for unmanned aerial vehicles, including a ladder frame 1 provided with a fixed ladder 2 and a movable ladder 3, the fixed ladder 2 is connected with the movable ladder 3, the fixed ladder 2 includes N first steps 21, and the movable ladder 3 includes a movable ladder platform and a driving mechanism 33 for driving the movable ladder platform to rise and fall.

[0044] The fixed ladder 2 is a ladder with fixed steps, which includes N first steps 21. The value of N can be 1, that is, a one-step ladder, or a larger value, that is, a multi-step ladder. For example, N is 3, which is a three-step ladder. The specific configuration can be selected according to actual needs and is not limited. The movable ladder 3 is used to switch the ladder model of the working ladder based on the fixed ladder 2. It mainly includes a movable ladder platform and a driving mechanism 33 that drives it to rise and fall. The driving mechanism 33 can change the height of the movable ladder 3 by making the movable ladder platform to switch to the ladder position of the target step.

[0045] In order to realize the transformation of adding at least two steps on the basis of the fixed step 2, in an embodiment of the present application, the movable ladder platform includes a fixed ladder portion 32, a movable ladder portion 31 and a drive assembly 35, the fixed ladder portion 32 is lower than the movable ladder portion 31, and the drive assembly 35 drives the movable ladder portion 31 to switch between the first working position and the second working position in the horizontal direction. The fixed ladder portion 32 rises and falls with the movable ladder platform to switch between the standby position and the third working position. When the fixed ladder portion 32 is in the third working position, the step is larger than the fixed ladder 2.

[0046] The movable platform has a fixed ladder portion 32 and a movable ladder portion 31, wherein the fixed ladder portion 32 is fixedly arranged on the movable platform, and is movably switched between the standby position and the third working position as the movable platform is raised and lowered, that is, the fixed ladder portion 32 is driven by a driving mechanism 33 to raise and lower the movable platform and moves synchronously, and is used as an N+1-level ladder when in the third working position, and is not used in the standby position and is in a standby state; the movable ladder portion 31 is higher than the fixed ladder portion 32 on the movable platform, and can be movably switched between the first working position and the second working position in the horizontal direction through the drive of the driving component 35; when the movable ladder portion 31 is switched to the first working position, it can be used as an extension of the N-level ladder or as an N+1-level ladder; when the movable ladder portion 31 is switched to the second working position, it can be used as an N+2-level ladder and provide ladder space for the fixed ladder portion 32.

[0047] In this way, when the working ladder has N steps, the movable ladder platform is consistent in height with the fixed ladder 2, the movable ladder portion 31 is located in the first working position and connected with the fixed ladder 2, and the fixed ladder portion 32 is located in the standby position; when the working ladder has N+1 steps, the movable ladder platform is one step higher than the fixed ladder 2, the movable ladder portion 31 is located in the first working position and connected with the fixed ladder 2, and the fixed ladder portion 32 is located in the standby position; when the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed ladder 2, the movable ladder portion 31 is in the second working position, and the fixed ladder portion 32 is located in the third working position and connected with the fixed ladder 2.

[0048] For example, combining Figure 4 As shown, taking the fixed step 2 as a 3-step ladder as an example, the movable step 3 can add a conversion structure of 4 steps and 5 steps on the basis of the fixed step 2, that is, free switching between 3-step to 5-step working ladders. Specifically, when the working ladder is a 3-step ladder, the movable ladder platform is consistent in height with the fixed step 2, the movable ladder portion 31 is located in the first working position and connected with the fixed step 2, and the fixed ladder portion 32 is located in the standby position; when the working ladder is a 4-step ladder, the movable ladder platform is one step higher than the fixed step 2, the movable ladder portion 31 is located in the first working position and connected with the fixed step 2, and the fixed ladder portion 32 is located in the standby position; when the working ladder is a 5-step ladder, the movable ladder platform is two steps higher than the fixed step 2, the movable ladder portion 31 is in the second working position, and the fixed ladder portion 32 is located in the third working position and connected with the fixed step 2.

[0049] Through the above technical solution, the fixed step 2 of the working ladder cooperates with the movable step 3 to increase at least two steps on the basis of the fixed step 2, and through the lifting and lowering of the movable ladder platform of the movable step 3 by the driving mechanism 1 33 and the driving of the fixed ladder part 32 by the driving component 35, the working ladder can be freely transformed between at least three types of working ladders, such as freely switching between the 3rd, 4th and 5th positions. This can meet the personnel carrying capacity of different types of drones, avoid the need to use a large number of different types of working ladders, reduce management and maintenance costs, and is more convenient and practical.

[0050] An automatic lifting work ladder suitable for an unmanned aerial vehicle in an embodiment of the present application has a switchable fixed ladder portion 32 and a movable ladder portion 31 through a movable step 3. The movable ladder portion 31 is the highest step. It can connect with the fixed ladder 2 and avoid the fixed ladder portion 32 through movable switching in the horizontal direction. In combination with the fixed ladder portion 32 that can serve as an intermediate step, a ladder structure of at least two steps can be increased.

[0051] Based on this, in one embodiment, combined with Figure 1-4As shown, the fixed ladder portion 32 includes a second step 321 , and the second step 321 is one step lower than the movable ladder portion 31 and one step higher than the fixed step 2 .

[0052] In this way, by using a second step 321 as the fixed step portion 32 , the movable step portion 31 can achieve structural transformation from N steps to N+2 steps in cooperation with the second step 321 .

[0053] As an extension of the technical concept of this application, combined with Figure 5 and Figure 6 As shown, in another embodiment, the fixed ladder portion 32 may include two second steps 321 of continuous steps, the higher second step 321 of the two second steps 321 is one step lower than the movable ladder portion 31, and the lower second step 321 is one step higher than the fixed step 2, and the second step 321 rises and falls with the movable ladder platform to switch between the standby position, the third working position and the fourth working position, and the fourth working position is one step higher than the third working position.

[0054] In this embodiment, the fixed ladder portion 32 is provided with two second steps 321 of continuous steps, that is, the ladder position of one second step 321 is higher than the other step and is located at the corresponding ladder position. The two second steps 321 are switched between the standby position, the third working position and the fourth working position as the movable ladder platform is raised and lowered. When the movable ladder portion 31 is at the ladder position of the N+1 level, the two second steps 321 of the fixed ladder portion 32 are both at the standby position in an unused state. When the movable ladder portion 31 is at the ladder position of the N+2 level, The higher one of the two second steps 321 of the fixed ladder portion 32 can be switched to the third working position as the N+1 step, and the other second step 321 is in the standby position and connected with the fixed ladder 2. When the movable ladder portion 31 is in the N+3 step, the higher one of the two second steps 321 of the fixed ladder portion 32 can be switched to the fourth working position as the N+2 step, and the other second step 321 is in the N+1 step.

[0055] That is to say, when the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed step 2, the movable ladder portion 31 is located in the second working position, the second step 321 of the two second steps 321 of the fixed ladder portion 32, which is higher, is located in the third working position, and the other second step 321 is located in the standby position; when the working ladder has N+3 steps, the movable ladder platform is three steps higher than the fixed step 2, the movable ladder portion 31 is in the second working position, the second step 321 of the two second steps 321 of the fixed ladder portion 32, which is higher, is located in the fourth working position, and the other second step 321 is located in the third working position.

[0056] In order to make the fixed ladder part 32 and the movable ladder part 31 be able to be raised and lowered better, Figure 1-3 As shown, the movable ladder platform may also include a lifting frame 34 driven by the driving mechanism 33 to rise and fall, the movable ladder portion 31 is arranged on the top of the lifting frame 34, and the fixed ladder portion 32 is arranged on the lifting frame 34 and located between the lifting frame 34 and the fixed step 2.

[0057] In this way, the lifting frame 34 is driven to rise and fall by the driving mechanism 1 33, and can drive the fixed ladder 32 and the movable ladder 31 thereon to rise and fall synchronously to switch positions. Each rise and fall is preferably a step height, and the fixed ladder 32 is arranged between the lifting frame 34 and the fixed step 2, so that the connection and switching can be better. In the specific implementation process, when the working ladder configuration can be replaced with N+3 steps, the length of the lower second step 321 of the two second steps 321 is greater than or equal to the distance between the lifting frame 34 and the fixed step 2.

[0058] On this basis, further, the movable ladder part 31 includes a workbench 311 slidably arranged at the top of the lifting frame 34, and the workbench 311 is driven by the driving component 35 to switch between the first working position and the second working position in the horizontal direction. The length of the workbench 311 is longer than the lifting frame 34 and is longer than the step width of at least one step. The workbench 311 has a large area, and it can be used as a step surface and also can carry maintenance personnel, and the workbench 311 is slidably installed on the lifting frame 34 through a slide rail.

[0059] In order to improve the stability of the work ladder and the safety of personnel, the ladder frame 1 is further provided with a guide frame 4, the lifting frame 34 is slidably matched with the guide frame 4, the guide frame 4 is provided with a first handrail 12, and the ladder frame 1 is provided with a second handrail 11.

[0060] In this way, the lifting frame 34 can be lifted up and down more stably by the guide frame 4 fixed on the ladder frame 1, and the first handrail 12 and the second handrail 11 can be provided to facilitate the maintenance personnel to go up and down more safely. In addition, a vertical baffle can be provided at the outer end of the workbench 311 to prevent the maintenance personnel from falling, thereby further improving safety.

[0061] In the specific implementation process, a plurality of universal 150-degree FOMA wheels are provided at the bottom of the ladder frame 1. Since the universal 150 degree FOMA wheels 13 have special rubber supports and a large contact area, and the working platform itself is heavy, it can effectively prevent the traditional working ladder from slipping due to oil.

[0062] In the embodiment of the present application, the number N of the first steps 21 of the fixed steps 2 is preferably 3.

[0063] In this way, the work ladder can be freely transformed between the 3rd, 4th and 5th level positions. There is no need to deploy a large number of work ladders to alternately put into production in order to meet the needs of different types of drones, as with traditional ladders. This can effectively reduce management and maintenance costs, and there is no need to allocate a large amount of space for storage and safekeeping.

[0064] In addition, the ladder frame 1 is also provided with a battery, a power converter and a controller, the controller is electrically connected to the drive mechanism 1 33 and the drive assembly 35, and the battery is electrically connected to the controller through the power converter. The battery can power the electrical appliances on the work ladder, so that it can be moved flexibly.

[0065] In some embodiments of the driving mechanism 33 and the driving assembly 35, the driving mechanism 33 is used for the lifting and lowering drive of the lifting frame 34, and it can be a linear driving mechanism, such as a hydraulic cylinder, a lifter, a screw-nut sub-mechanism and other structures as the lifting drive. Similarly, the driving assembly 35 is used to drive the workbench 311 to move in the horizontal direction, and it can also be a linear driving mechanism, such as a screw-nut sub-mechanism, or an electric guide rail, etc. There is no limitation, and the configuration can be selected according to actual needs.

[0066] Please refer to Figure 7 and Figure 8 As shown, an embodiment of the present application also provides an automatic lifting work ladder control system, which is an automatic lifting work ladder suitable for unmanned aerial vehicles based on any of the above-mentioned technical solutions, including: a first acquisition module, used to collect the current first position information of the movable ladder platform; a second acquisition module, used to collect the current second position information of the movable ladder part 31; and a control module, used to determine the current step of the work ladder according to the first position information and the second position information, and control the drive mechanism 33 to drive the movable ladder platform to switch from the current position to the working position corresponding to the target step according to the step switching instruction, and / or control the drive component 35 to drive the movable ladder part 31 to switch from the current position to the working position corresponding to the target step.

[0067] Among them, the first acquisition module is used to collect the current first position information of the movable ladder platform. The first position information can be the location of the movable ladder platform. Specifically, the first position information can be collected by a distance sensor, and of course it is not limited to other existing detection devices that can be used to collect the first position information. Similarly, the second detection module has the same principle as the first acquisition module. The controller, as a control device of the working ladder, can receive a step switching instruction. For example, when receiving a switch to a 4-step ladder, the current step of the working ladder is first determined according to the first position information and the second position information. If the current step is 3, the controller only needs to control the driving mechanism 1 33 to control the lifting frame 34 to switch the movable ladder part 31 to the 4-step ladder position. If the current step is 5, the controller needs to first control the movable ladder part 31 to switch from the second working position to the first working position, so that it is retracted, and then control the driving mechanism 1 33 to drive the lifting frame 34 to descend one step. In this way, the automatic conversion of different steps can be realized; when switching to other steps, it is also achieved by lifting and lowering the movable ladder platform and / or moving the movable ladder part 31, which will not be repeated here. During this process, the distance sensor can be used to detect whether the movement is in place. For example, when the movable ladder part 31 moves to the second working position, a signal is fed back to the controller, and the signal is used as an in-place signal, so that the controller can issue the next control instruction more accurately.

[0068] In order to further improve the safety of the working ladder, in an embodiment of the present application, it may also include a sound and light alarm module and a pressure detection module. The pressure detection module is used to detect the pressure information of the movable ladder part 31. The control module determines whether the lifting conditions are met based on the equipment information including at least the pressure information. When the lifting conditions are not met, the sound and light alarm module prompts an alarm.

[0069] The sound and light alarm module is used to give an alarm reminder through sound and / or light, and the pressure detection module is used to detect the weight of the workbench 311. When the pressure reaches the upper limit of the load, the pressure detection module sends a feedback signal to the controller. After receiving the signal, the controller controls the sound and light alarm module to prompt an alarm to avoid safety accidents. In this way, automatic detection before switching can be achieved, which is safer.

[0070] In order to facilitate remote control operation, a remote control terminal may also be included. The remote control terminal is provided with a first wireless transceiver module. The control mainboard of the remote control terminal is respectively connected to the touch screen and the first wireless transceiver module. The work ladder is provided with a second wireless transceiver module connected to the control mainboard of the control module. The second wireless transceiver module is connected to the first wireless transceiver module for communication. In this way, control through remote control is more convenient.

[0071] In addition, the work ladder can also be equipped with devices such as electronic locks to prevent non-staff operations and ensure safety. The status information of the electronic locks of the equipment and the information collected by the distance sensor as the first acquisition module and the second acquisition module can also be included in the condition evaluation before switching. When all conditions are met, the lifting and lowering switch will be performed, which can further avoid the occurrence of safety accidents.

[0072] Regarding the control flow of the embodiment of the present application, as shown in the figure, the work ladder is moved to the work area, and preparations are made before use, and then the equipment is powered on and the system is self-checked. The content of the self-check includes the battery power, whether the sensor is working properly, etc. If there is an abnormality in the self-check, the sound and light prompt alarm of the B module is entered, and then the inspection and processing are carried out manually, and the self-check is performed again after the processing is completed; if there is no abnormality in the self-check, the target step of the lift is selected manually through a control module such as a remote controller and a detection is issued to see whether it meets the lifting operation requirements. If it does not meet the requirements, a sound and light alarm is issued, and when it meets the requirements, a step switching instruction is issued, and the controller controls the drive mechanism 1 33 and the drive component 35 to perform the lifting operation and perform the sound and light mode of the A module, and then locks the current state and gives a green light prompt; after the operator climbs up the work ladder, the overload detection is started. If it is overloaded, the lifting overload alarm of the C mode is performed. If it is not overloaded, the maintenance work is waited for to be completed, and the work end instruction is sent through manual control, and the power is cut off and stored manually, and placed in the designated area, and then the end is completed.

[0073] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention, and the protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An automatic lifting work ladder suitable for unmanned aerial vehicles, characterized in that: The invention comprises a ladder frame (1) provided with a fixed ladder (2) and a movable ladder (3), wherein the fixed ladder (2) is connected with the movable ladder (3), the fixed ladder (2) comprises N first steps (21), and the movable ladder (3) comprises a movable ladder platform and a driving mechanism (33) for driving the movable ladder platform to rise and fall; The movable ladder platform comprises a fixed ladder portion (32), a movable ladder portion (31) and a driving assembly (35); the fixed ladder portion (32) is lower than the movable ladder portion (31); the driving assembly (35) drives the movable ladder portion (31) to switch between a first working position and a second working position in a horizontal direction; the fixed ladder portion (32) rises and falls with the movable ladder platform to switch between a standby position and a third working position; and the fixed ladder portion (32) has a step larger than the fixed step (2) when in the third working position; When the working ladder has N steps, the movable ladder platform is consistent in height with the fixed ladder (2), the movable ladder portion (31) is located in the first working position and connected with the fixed ladder (2), and the fixed ladder portion (32) is located in the standby position; when the working ladder has N+1 steps, the movable ladder platform is one step higher than the fixed ladder (2), the movable ladder portion (31) is located in the first working position and connected with the fixed ladder (2), and the fixed ladder portion (32) is located in the standby position; when the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed ladder (2), the movable ladder portion (31) is in the second working position, and the fixed ladder portion (32) is located in the third working position and connected with the fixed ladder (2).

2. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 1, characterized in that: The fixed ladder part (32) comprises a second step (321), wherein the second step (321) is one step lower than the movable ladder part (31) and one step higher than the fixed step (2).

3. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 1, characterized in that: The fixed ladder portion (32) comprises two second steps (321) of continuous steps, the second step (321) of the higher one of the two second steps (321) is one step lower than the movable ladder portion (31), and the second step (321) of the lower one is one step higher than the fixed step (2), the second step (321) rises and falls with the movable ladder platform to switch between the standby position, the third working position and the fourth working position, and the fourth working position is one step higher than the third working position; When the working ladder has N+2 steps, the movable ladder platform is two steps higher than the fixed ladder (2), the movable ladder portion (31) is located in the second working position, the second step (321) of the two second steps (321) of the fixed ladder portion (32) that is the higher one is located in the third working position, and the other second step (321) is located in the standby position; when the working ladder has N+3 steps, the movable ladder platform is three steps higher than the fixed ladder (2), the movable ladder portion (31) is located in the second working position, the second step (321) of the two second steps (321) of the fixed ladder portion (32) that is the higher one is located in the fourth working position, and the other second step (321) is located in the third working position.

4. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 1, characterized in that: The movable ladder platform also includes a lifting frame (34) driven by the driving mechanism (33) to be lifted and lowered, the movable ladder portion (31) is arranged on the top of the lifting frame (34), and the fixed ladder portion (32) is arranged on the lifting frame (34) and located between the lifting frame (34) and the fixed step (2).

5. The automatic lifting working ladder suitable for unmanned aerial vehicles as claimed in claim 4, characterized in that: The movable ladder part (31) comprises a workbench (311) slidably arranged at the top of the lifting frame (34); the workbench (311) is driven by a driving assembly (35) to movably switch between a first working position and a second working position in a horizontal direction; the length of the workbench (311) is longer than the lifting frame (34) and is longer than the step width of at least one step.

6. The automatic lifting working ladder suitable for unmanned aerial vehicles as claimed in claim 5, characterized in that: The ladder frame (1) is also provided with a guide frame (4), the lifting frame (34) is slidably matched with the guide frame (4), the guide frame (4) is provided with a first handrail (12), and the ladder frame (1) is provided with a second handrail (11).

7. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 1, characterized in that: The bottom of the ladder frame (1) is provided with a plurality of universal fulmar wheels; And / or, the number N of the first steps (21) of the fixed steps (2) is 3.

8. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 1, characterized in that: The ladder frame (1) is also provided with a storage battery, a power converter and a controller. The controller is electrically connected to the driving mechanism 1 (33) and the driving assembly (35), and the storage battery is electrically connected to the controller via the power converter.

9. An automatic lifting work ladder control system, based on the automatic lifting work ladder suitable for unmanned aerial vehicles as claimed in any one of claims 1 to 7, characterized in that: include: A first acquisition module, used for acquiring the current first position information of the movable platform; A second acquisition module, used for acquiring current second position information of the movable ladder part (31); as well as The control module is used to determine the current step of the working ladder according to the first position information and the second position information, and control the driving mechanism (33) to drive the movable ladder platform to switch from the current position to the working position corresponding to the target step according to the step switching instruction, and / or control the driving component (35) to drive the movable ladder part (31) to switch from the current position to the working position corresponding to the target step.

10. The automatic lifting working ladder suitable for unmanned aerial vehicles according to claim 9, characterized in that: It also includes an audible and visual alarm module and a pressure detection module, wherein the pressure detection module is used to detect pressure information of the movable ladder part (31), and the control module determines whether the lifting condition is met based on the equipment information including at least the pressure information, and when the lifting condition is not met, the audible and visual alarm module prompts an alarm.

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