A portable electrically powered landing gear retraction controller

Abstract

The application discloses a portable electric landing gear folding controller, which comprises a box upper cover, a box lower cover, a fixing plate fixed to the box lower cover, a power supply module and a main controller module located on the fixing plate, a switch panel fixedly connected with the fixing plate through a copper lifting column, a socket fixed to the box upper cover, a fault protection indicator lamp, a power supply indicator lamp, a power consumption state display module and a battery state display module, wherein the fault protection indicator lamp and the power consumption state display module are electrically connected with the main controller module, the power supply indicator lamp and the battery state display module are electrically connected with the power supply module, an operation handle module is electrically connected with the main controller module through a first cable and used for sending a control instruction to the main controller module, and the main controller module is electrically connected with an actuating cylinder of a UAV landing gear through a second cable and used for controlling the actuating cylinder to act according to the control instruction so as to drive the landing gear to complete a folding state. The box has a reasonable layout, improves space utilization and is convenient to carry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of controllers, and more particularly to a portable electric landing gear retraction controller. BACKGROUND

[0002] The traditional aircraft landing gear retraction cylinder is driven by a centralized hydraulic source of the aircraft, and various functional hydraulic components and hydraulic cylinders are connected by a long hydraulic pipeline to drive the movement of each part. However, there is leakage and pressure loss along the pipeline when the hydraulic accessories are working, and a throttle valve is needed to adjust the movement speed when the landing gear is actuated. A large amount of energy is consumed in the form of leakage, pipeline loss and throttling heat, and the energy utilization rate of the hydraulic actuation is low. At the same time, the hydraulic system not only includes power hydraulic elements, but also includes corresponding hydraulic control elements, hydraulic execution elements and complex hydraulic pipelines, resulting in a large system size and heavy weight. Therefore, the traditional hydraulic landing gear retraction scheme is difficult to apply to unmanned aerial vehicles with strict quality requirements.

[0003] In addition, the landing gear retraction control of medium and large unmanned aerial vehicles has always relied on airborne retraction equipment, and the use of unmanned aerial vehicle airborne equipment has caused many problems such as carrying difficulty, internal layout disorder, complicated operation and unstable circuit in product assembly, landing gear retraction test and exhibition deployment and withdrawal. Especially in the working environment without airborne landing gear controller, such as aircraft assembly in air show and landing gear inspection test on the ground, the landing gear retraction becomes a problem, which reduces the work efficiency, lacks solutions, affects the project progress and causes time and economic losses.

[0004] Therefore, it is urgent to provide a portable electric landing gear retraction controller to solve the technical problems of carrying difficulty, complicated equipment accessories and unreasonable internal layout of the unmanned aerial vehicle retraction and landing gear control equipment. SUMMARY

[0005] The purpose of the present application is to provide a portable electric landing gear retraction controller, which can realize the miniaturization, portability, reasonable internal layout and space utilization of the controller.

[0006] To achieve the above purpose, the present application provides a portable electric landing gear retraction controller, which comprises a box upper cover and a box lower cover, the box upper cover and the box lower cover are hingedly connected, and further comprises:

[0007] A fixing plate is fixed on the box lower cover;

[0008] A power supply module and a main controller module are located on the fixing plate, and the power supply module is electrically connected with the main controller module;

[0009] A switch panel is fixedly connected with the fixed plate through a copper riser;

[0010] A socket is fixed on the upper cover of the box body, and the socket is electrically connected with the power supply module;

[0011] A fault protection indicator and a power supply indicator are fixed on the upper cover of the box body, the fault protection indicator is electrically connected with the main controller module, and the power supply indicator is electrically connected with the power supply module;

[0012] A power consumption state display module and a battery state display module are fixed on the upper cover of the box body, the battery state display module is connected with the power supply module, and the power consumption state display module is connected with the main controller module;

[0013] An operation handle module is electrically connected with the main controller module through a first cable to send a control instruction to the main controller module;

[0014] The main controller module is electrically connected with an actuating cylinder of a UAV landing gear through a second cable, and controls the actuating cylinder to act according to the control instruction to drive the landing gear to complete a retraction state.

[0015] Optionally, the UAV landing gear is provided with an upper position lock sensor and a lower position lock sensor, and the main controller module controls the actuating cylinder to act according to the control instruction to drive the landing gear to complete a retraction state, specifically including:

[0016] The main controller module controls a driving motor of the actuating cylinder to rotate to drive the landing gear to move up and down;

[0017] When the landing gear is retracted or lowered to a position and locked, the main controller module controls the driving motor to stop rotating to realize the retraction state of the landing gear after receiving a position signal fed back by the upper position lock sensor or the lower position lock sensor of the landing gear.

[0018] Optionally, the main controller module includes:

[0019] An overcurrent protection module is configured to compare an input current of the power supply module with a set threshold value, disconnect the current if the input current is higher than the set threshold value, and output the current if the input current is lower than the set threshold value;

[0020] A current limiting and voltage stabilizing module is configured to perform voltage stabilizing control on the current output by the overcurrent protection module;

[0021] An electronic speed controller is used to transform the current outputted by the current limiting and voltage stabilizing module into the current used to drive the motor to operate;

[0022] Intermediate relays, including a forward rotation intermediate relay and a reverse rotation intermediate relay, are used to control the forward rotation and reverse rotation of the current transformed by the electronic speed controller; the forward rotation intermediate relay and the reverse rotation intermediate relay include a double interlocking circuit with limit switches;

[0023] Limit relays are used to identify the position signals fed back by the up position lock sensor or the down position lock sensor and control the action state of the intermediate relays.

[0024] Optionally, the power supply module includes an external power supply module and an internal power supply module, the external power supply module includes a switching power supply, a charger, a battery pack and a power supply switching intermediate relay;

[0025] The switching power supply is connected with the socket and the charger respectively, the charger is connected with the power supply switching intermediate relay, and the power supply switching intermediate relay is connected with the battery pack;

[0026] The battery state display module is connected with the battery pack in parallel, and the power consumption state display module is connected with the current limiting and voltage stabilizing module in parallel.

[0027] Optionally, the power supply indicator light includes an internal power supply indicator light and an external power supply indicator light, the external power supply indicator light and the internal power supply indicator light are connected with both ends of the power supply switching intermediate relay respectively, and the internal power supply indicator light and the external power supply indicator light are disconnected through the power supply switching intermediate relay.

[0028] Optionally, the operation handle module includes a received position indicator light, a received state indicator light, a received start button, a rotation speed knob, an emergency stop button, a placed position indicator light, a released state indicator light and a placed start button;

[0029] The received position indicator light, the received state indicator light, the received start button, the rotation speed knob, the emergency stop button, the placed position indicator light, the released state indicator light and the placed start button are electrically connected with the main controller module through the first cable.

[0030] Optionally, a power supply radiator is arranged on the switching power supply, and a power tube radiator is arranged on the main controller module.

[0031] Optionally, the charger is coated with heat-conducting silicone grease at the place where it is attached to the switching panel.

[0032] Optionally, the fixed plate is fixedly connected with the lower cover of the box through a hexagonal cylindrical head metal screw, and the metal screw is partially exposed from the lower cover of the box.

[0033] Optionally, the socket has an overheat fuse and a switch, and is grounded through the metal screw.

[0034] The beneficial effects of the present application are that:

[0035] The present application integrates the main controller module, the power supply module, the switch panel and the socket in the box, so that the layout of each module in the box is reasonable, the space utilization is improved, the box is convenient to carry, the switch panel is designed in the box, is used for separating the main controller module, the cable and the operation handle module, all cables can be stored in transportation and storage, the complete closure of the box is realized, and the control of the unmanned aerial vehicle landing gear folding and unfolding is facilitated in the scene of aircraft assembly in air show, ground landing gear inspection and testing.

[0036] Further, the main controller module comprises an overcurrent protection module, an electronic speed regulator, an intermediate relay and a limit relay, and can realize the functions of anti-misoperation and automatic current limiting.

[0037] Further, the charger is coated with heat-conducting silicone grease at the bonding position of the switch panel, so that good heat dissipation can be realized.

[0038] Further, the power supply is provided with a power supply radiator, and the main controller module is provided with a power tube radiator, so that effective heat dissipation can be realized.

[0039] The device has other characteristics and advantages, which will be apparent from or set forth in the accompanying drawings and the following detailed description, which together serve to explain certain principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0040] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout and in which:

[0041] Figure 1 A structural schematic diagram of a portable electric landing gear folding and unfolding controller is shown.

[0042] Figure 2 An enlarged structural schematic diagram of a main controller module and a power supply module of a portable electric landing gear folding and unfolding controller is shown.

[0043] Figure 3 A portable electric landing gear folding and unfolding controller based onFigure 2 the front view of the portable electric landing gear controller.

[0044] Figure 4 the front view of the portable electric landing gear controller.

[0045] Reference signs:

[0046] 1. upper cover of the box; 2. external power supply socket; 3. switch panel; 4. charger; 5. battery pack; 6. fixed plate; 7. lower cover of the box; 8. fault protection indicator light; 9. internal power supply indicator light; 10. external power supply indicator light; 11. power consumption state display module; 12. battery state display module; 13. operating handle module; 13.1. received position indicator light; 13.2. stowed state indicator light; 13.3. stowed start button; 13.4. rotation speed knob; 13.5. emergency stop button; 13.6. released position indicator light; 13.7. released state indicator light; 13.8. released start button; 14. master switch; 15. main controller module; 16. switching power supply; 17. power supply switching intermediate relay; 18. forward rotation intermediate relay; 19. reverse rotation intermediate relay; 20. power supply heat sink; 21. power tube heat sink; 22. current limiting and voltage stabilizing module; 23. insulated elevated column; 24. overcurrent protection module; 25. limit relay; 26. electronic speed regulator. DETAILED DESCRIPTION

[0047] The present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so as to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0048] A portable electric landing gear controller according to the present application comprises an upper cover of the box 1 and a lower cover of the box 7, the upper cover of the box 1 and the lower cover of the box 7 are hingedly connected, and further comprises:

[0049] a fixed plate 6, the fixed plate 6 is fixed on the lower cover of the box 7;

[0050] a power supply module and a main controller module 15, the power supply module and the main controller module 15 are located on the fixed plate 6, and the power supply module is electrically connected with the main controller module 15;

[0051] a switch panel 3, the switch panel 3 is fixedly connected with the fixed plate 6 through a copper elevated column;

[0052] a socket, the socket is fixed on the upper cover of the box 1, and the socket is electrically connected with the power supply module;

[0053] The fault protection indicator 8 and the power supply indicator are fixed on the upper cover 1 of the box body, the fault protection indicator 8 is electrically connected with the main controller module 15, and the power supply indicator is electrically connected with the power supply module;

[0054] The power consumption state display module 11 and the battery state display module 12 are fixed on the upper cover 1 of the box body, the battery state display module 12 is connected with the power supply module, and the power consumption state display module 11 is connected with the main controller module 15;

[0055] The operation handle module 13 is electrically connected with the main controller module 15 through the first cable, and is used for sending a control instruction to the main controller module 15.

[0056] The main controller module 15 is electrically connected with the actuating cylinder of the unmanned aerial vehicle landing gear through the second cable, and controls the actuating cylinder to act according to the control instruction, so that the landing gear completes the folding and unfolding state.

[0057] Specifically, the switch panel 3 adopts 5A02-OO annealed state aluminum plate bending laser cutting opening sulfuric acid anodizing surface treatment, matte black surface paint, has the characteristics of good sealing, corrosion resistance and impact resistance, can effectively seal the box body and protect the electrical devices, and can play a good heat dissipation effect in the working process. The switch panel 3 is connected with the fixed plate 6 through 6 copper risers. The fixed plate 6 is formed by laser cutting of 2A12 aluminum plate, sulfuric acid anodizing surface treatment, spraying xinyellow primer, matte black surface paint, and no paint at the connection part of the switch panel 3. The fixed plate 6 is connected with the switch panel 3 through copper risers, realizes low impedance of the whole machine, and is connected with the lower cover 7 of the box body through 4 M8*12 internal hexagonal cylindrical head screws. The screw head is exposed outside the lower cover 7 of the box body to play a grounding role. The fixed plate 6 can be fixed firmly with the lower cover 7 of the box body, increase the overall structural strength, and have better protection performance. The power supply module is used for providing current for the main controller module 15. After the rear of the box body is closed, the whole device is in a completely closed state, the overall protection performance reaches IP67 level waterproof and dustproof standard, the box body is provided with shockproof foam inside, has certain shock absorption and impact resistance and other protection capabilities, adopts spring self-locking lock, and automatically balances the air pressure valve. Even in the case of frequent movement and deployment and in harsh environments, the internal device can also provide more safe and reliable protection.

[0058] The main controller module 15, the power supply module, the switch panel 3 and the socket are integrated in the box body, so that the modules in the box body are reasonably arranged, the space utilization is improved, the box body is convenient to carry, the switch panel 3 is designed in the box body, is used for separating the main controller module 15, the cable and the operation handle module 13, all the cables can be accommodated in transportation and storage, and the complete closure of the box body is realized.

[0059] In one example, the upper position lock sensor and the lower position lock sensor are arranged on the unmanned aerial vehicle landing gear, and the main controller module 15 controls the driving cylinder to act according to the control instruction, so that the landing gear completes the folding and unfolding state, which specifically includes:

[0060] The main controller module 15 controls the driving motor of the driving cylinder to rotate according to the control instruction, so that the landing gear moves up and down;

[0061] When the landing gear is folded or unfolded to the position and locked, the main controller module 15 receives the position signal fed back by the upper position lock sensor or the lower position lock sensor of the landing gear, and controls the driving motor to stop rotating, thereby realizing the folding and unfolding state of the landing gear.

[0062] Specifically, the main controller module 15 controls the driving motor of the driving cylinder of the landing gear to rotate, so as to realize the folding and unfolding function of the landing gear. During the folding and unfolding process, the main controller module 15 can realize variable-speed rotation of the driving motor, that is, after the folding and unfolding driving cylinder is unlocked, it runs at a certain speed until the highest speed is limited, the middle stroke adopts uniform motion, and the last 50mm motion before reaching the position adopts low-speed motion. After the landing gear is folded or unfolded to the position and locked, the main controller module 15 receives the signal fed back by the upper position lock sensor or the lower position lock sensor, and controls the driving motor to stop rotating after the driving motor is blocked, thereby realizing the folding and unfolding state of the landing gear.

[0063] In one example, the main controller module 15 includes:

[0064] The overcurrent protection module 24 is used to compare the input current of the power supply module with the set threshold value, and if the input current is higher than the set threshold value, the current is disconnected; if the input current is lower than the set threshold value, the current is output;

[0065] The current limiting and voltage stabilizing module 22 is used to stabilize the voltage of the current output by the overcurrent protection module 24;

[0066] The electronic speed regulator 26 is used to transform the current output by the current limiting and voltage stabilizing module 22 into the current for driving the motor to run;

[0067] The intermediate relay includes the forward rotation intermediate relay 18 and the reverse rotation intermediate relay 19, the forward rotation intermediate relay 18 is used to control the forward rotation of the current transformed by the electronic speed regulator 26, and the reverse rotation intermediate relay 19 is used to control the reverse rotation of the current transformed by the electronic speed regulator 26; the forward rotation intermediate relay 18 and the reverse rotation intermediate relay 19 include a double interlocking circuit with a limit switch;

[0068] The limit relay 25 is used to identify the position signal fed back by the upper position lock sensor or the lower position lock sensor of the landing gear and control the action state of the intermediate relay.

[0069] Specifically, the overcurrent protection module 24 can detect 0-10A current, with detection accuracy reaching 0.01A, and the maximum current threshold can be set to 0-10A. When the current reaches the threshold, the circuit is disconnected, so that the current cannot enter the electronic speed controller 26, the current-limiting and voltage-stabilizing module 22, the forward intermediate relay 18, and the reverse intermediate relay 19, and other key electrical modules, thereby protecting the safety of the electric landing gear retraction controller and the landing gear actuator cylinder driving motor. The current threshold can be set through the button on the overcurrent protection module 24, and functions such as automatic reset of current reduction and reset after restart can be realized. The current-limiting and voltage-stabilizing module 22 adopts synchronous rectification technology, with conversion efficiency reaching more than 90%, and has multiple software protection mechanisms and adjustable protection thresholds. When the working parameters of the module exceed the protection thresholds, the output is automatically turned off, and the module has a soft start function, with an under-voltage protection threshold of 5.8-50V, an over-voltage protection threshold of 0-51V, an over-current protection threshold of 0-20.1A, and a timeout working protection of 0-100h. The parameters can be quickly adjusted on the power consumption status display module 11, and the parameters are displayed on the power consumption status display module 11. The electronic speed controller 26 adopts a powerful and high-performance MCU, has strong anti-interference performance, high efficiency, low heating, and stable speed regulation, and has good power-on safety. After the power is turned on, the motor will not start immediately regardless of the duty cycle of the PWM, and the controller supports mobile phone APP programming and real-time data detection functions. The forward intermediate relay 18 and the reverse intermediate relay 19 adopt a double interlocking circuit design. When the “retraction start button 13.3” is pressed, the circuit is connected to drive the motor in the forward direction, the normally open contact of the forward intermediate relay 18 is closed, the normally closed contact is disconnected, the reverse intermediate relay 19 coil cannot be powered, and the forward and reverse actions cannot be performed at the same time, so as to prevent short circuit accidents. When the actuator cylinder reaches the upper position lock trigger, the forward and reverse self-locking circuits are cut off, and automatic stopping at the position is realized. The limit relay 25 can identify the signal feedback from the upper and lower position lock sensors and control whether the intermediate relay coil in the main controller module 15 circuit, the position indicating lamp, and the state indicating lamp are powered, so as to realize the functions of automatic stopping at the position, state indication, and position indication.

[0070] In one example, the power supply module includes an external power supply module and an internal power supply module. The external power supply module includes a switching power supply 16, a charger 4, a battery pack 5, and a power supply switching intermediate relay 17.

[0071] The switching power supply 16 is connected with the socket and the charger 4, respectively. The charger 4 is connected with the power supply switching intermediate relay 17, and the power supply switching intermediate relay 17 is connected with the battery pack 5.

[0072] The battery state display module 12 is connected in parallel with the battery pack 5, and the power consumption status display module 11 is connected in parallel with the current-limiting and voltage-stabilizing module 22.

[0073] Specifically, the charger 4 is used with the battery pack 5 to achieve stable current charging, full charging and automatic stopping. The switching power supply 16 can provide 220V to 24V output voltage and 400W output power for the device. The driving motor of the landing gear has a rated power of 250W, and the switching power supply 16 can fully meet the power requirement, with overload protection, overvoltage protection, and short-circuit protection functions, mature performance, safety and reliability. The battery pack 5 uses 24V 18AH 18650 lithium batteries, which have the advantages of shock resistance, impact resistance, stability, reliability, high energy density, etc. The battery protection board is equipped with output over-power protection, over-charge protection, short-circuit protection, low-voltage protection, and over-discharge protection functions. The power consumption status display module 11 can directly display the input / output voltage, output current / output power / output capacity / output time, which can be adjusted by the multi-functional knob on the right side of the display screen. The output voltage can be adjusted from 0 to 50.00V, and the limit current can be adjusted from 0 to 20.00A. The battery status display module 12 can directly display the remaining battery capacity, battery voltage and battery temperature, with temperature abnormality alarm and low battery alarm functions. When the device is connected to an external power supply, the DC power is preferentially passed through the power supply switching intermediate relay 17, so that the device automatically switches to an external power supply mode, disconnects all power consumers from the internal battery pack 5, and charges the battery pack 5, realizing internal and external power supply isolation. Therefore, when the built-in battery pack 5 of the device is used for power supply, it cannot be charged, and when the battery pack 5 is charged, the battery pack 5 cannot supply power, thereby prolonging the service life of the battery pack 5.

[0074] In one example, the power supply indicator light includes an internal power supply indicator light 9 and an external power supply indicator light 10. The external power supply indicator light 10 is connected to both ends of the power supply switching intermediate relay 17, and the internal power supply indicator light 9 is disconnected from the power supply switching intermediate relay 17.

[0075] Specifically, when using the external power supply mode, the external power supply indicator light 10 is on, and when using the internal power supply mode, the internal power supply indicator light 9 is on.

[0076] In one example, the operation handle module 13 includes a received position indicator light 13.1, a stowed state indicator light 13.2, a stowed start button 13.3, a rotation speed knob 13.4, an emergency stop button 13.5, a placed position indicator light 13.6, a released state indicator light 13.7, and a release start button 13.8.

[0077] The received position indicator light 13.1, the stowed state indicator light 13.2, the stowed start button 13.3, the rotation speed knob 13.4, the emergency stop button 13.5, the placed position indicator light 13.6, the released state indicator light 13.7, and the release start button 13.8 are electrically connected to the main controller module 15 through the first cable.

[0078] Specifically, the operation handle module 13 is formed by 3D printing, made of PLA material, has good insulation performance, good tensile strength 33-55Mpa, the upper and lower shells have sealing silica gel, all buttons, indicator lights, knobs, cable connectors on the operation handle module 13 are selected from waterproof devices, so that the operation handle module 13 has certain waterproof performance. The lower shell of the operation handle module 13 is designed with an ergonomic groove, which optimizes the overall length and thickness size of the operation handle module 13, and is convenient for workers to hold. The handle button and the indicator light are simple and clear, and are provided with Chinese identification "emergency stop button 13.5" which is eye-catching and close to the thumb position, so as to press the "emergency stop button" at the fastest speed to prevent safety accidents, and the rotation speed knob 13.4 is designed with an enlarged knob cap, and a scale dial is arranged under the knob, so that the operation is more intuitive and accurate.

[0079] In one example, the switching power supply 16 is provided with a power supply radiator 20, and the main controller module 15 is provided with a power tube radiator 21.

[0080] Specifically, the switching power supply 16 is provided with an electric radiator, which is used for heat dissipation of the switching power supply 16; the power tube radiator 21 can be automatically started according to the temperature of the power tube, and can effectively dissipate heat and reduce the temperature of the key device in the high-power use scene.

[0081] In one example, the charging device 4 and the switching panel 3 are coated with heat-conducting silicone grease at the bonding position.

[0082] Specifically, the charging device 4 and the switching panel 3 are coated with heat-conducting silicone grease at the bonding position, which can effectively dissipate heat during the charging process.

[0083] In one example, the fixing plate 6 is fixedly connected with the lower cover 7 of the box body by a hexagonal cylindrical head metal screw, and the metal screw is partially exposed from the lower cover 7 of the box body.

[0084] Specifically, the fixing plate 6 and the lower cover 7 of the box body are fixedly connected by four M8x12 internal hexagonal head screws, the screw head is exposed from the lower cover 7 of the box body to play a grounding role, the fixing plate 6 can be fixedly connected with the lower cover 7 of the box body, the overall structural strength is increased, and better protection performance is achieved.

[0085] In one example, the socket has an overheat fuse and a switch, and is grounded by a metal screw.

[0086] Specifically, the socket is an external power supply socket 2, which is provided with an overheat fuse and a switch, and is grounded by a metal screw of the lower cover 7 of the box body, so as to improve the safety in the use of external power supply.

[0087] Embodiment:

[0088] The control logic of the unmanned aerial vehicle landing gear retraction controller is as follows: the landing gear retraction controller controls the rotation of the drive motor of the retraction cylinder to realize the retraction and release function of the landing gear. During the retraction and release process, the retraction controller can realize variable speed rotation of the drive motor, that is, after the retraction cylinder is unlocked, it runs at a certain speed until the maximum speed is reached, then it moves at a constant speed in the middle stroke, and finally it moves at a low speed in the last 50mm before reaching the position. After the landing gear is retracted and locked, the retraction controller receives the signal feedback from the upper and lower position lock sensors, and stops the rotation of the drive motor after the drive motor is blocked.

[0089] As can be seen from the above description, the airborne equipment landing gear retraction controller has the functions of speed regulation, block protection, signal recognition of upper and lower position lock sensors, etc. Therefore, the present application covers all basic functions of the airborne equipment landing gear retraction controller, and on this basis, adds protection circuit, anti-misoperation, man-machine interaction function, to ensure that the ground staff can use the device simply, safely and reliably.

[0090] As shown in Figure 1 The portable electric landing gear retraction controller mainly consists of the following parts: an upper cover 1 of a box body, an external power supply socket 2, a switch panel 3, a charger 4, a battery pack 5, a fixed plate 6, a lower cover 7 of the box body, a fault protection indicator light 8, an internal power supply indicator light 9, an external power supply indicator light 10, a power consumption status display module 11, a battery status display module 12, an operating handle module 13, a master switch 14, a main controller module 15 and a switching power supply 16. The main controller module 15 includes: an overcurrent protection module 24, a current limiting and voltage stabilizing module 22, an electronic speed regulator 26, a forward rotation intermediate relay 18, a reverse rotation intermediate relay 19, a limit relay 25 and an insulating elevated column 23. The operating handle module 13 includes a retraction to position indicator light 13.1, a retraction status indicator light 13.2, a retraction start button 13.3, a speed knob 13.4, an emergency stop button 13.5, a release to position indicator light 13.6, a release status indicator light 13.7 and a release start button 13.8.

[0091] In this embodiment, the entire device is completely closed after the box body is closed, and the overall protection performance reaches the IP67 level of waterproof and dustproof standard. The inside is equipped with shockproof foam, which has certain shock absorption and impact resistance protection capability. Spring self-locking lock is adopted, and automatic balance air pressure valve is adopted, so that the internal device can be provided with more safe and reliable protection even in frequently moving deployment and harsh environment.

[0092] In this embodiment, the external power supply socket 2 is provided with an overheat fuse type fuse and a switch, and is grounded through the metal screw below the lower cover 7 of the box body, thereby improving the safety in the use of external power supply.

[0093] In this embodiment, the switch panel 3 is made of 5A02-00 annealed aluminum plate, which is bent, laser cut and treated by sulfuric acid anodization and matt black surface paint. It has good sealing property, strong corrosion resistance and impact resistance, and can effectively seal the box and protect the electrical devices. It can also play a good heat dissipation role in the working process. Six copper risers are connected with the fixing plate 6, and the fixing plate 6 can be fixed firmly with the lower cover 7 of the box to increase the overall structural strength and have better protection performance.

[0094] In this embodiment, the charger 4 is used with the battery pack 5 to achieve stable current charging, self-stopping when full, and pasting heat-conducting silicone grease at the bonding place of the upper switch panel 3 to effectively dissipate heat during charging.

[0095] In this embodiment, the battery pack 5 is made of 24V18AH18650 lithium battery pack 5, which has the advantages of shock resistance, impact resistance, stability, reliability, high energy density, etc. It is equipped with a battery protection board, which has the functions of output over-power protection, over-charge protection, short-circuit protection, low-voltage protection and over-discharge protection.

[0096] In this embodiment, the fixing plate 6 is made of 2A12 aluminum plate, which is laser cut and formed, treated by sulfuric acid anodization, sprayed with xanthic yellow primer, and painted with matt black surface paint. The connection part with the switch panel 3 is not painted, and copper risers are used for connection to realize low impedance of the whole machine. The connection between the fixing plate 6 and the lower cover 7 of the box is achieved by using four M8x12 internal hexagonal cylindrical head screws, and the screw heads are exposed to the lower cover 7 of the box to play a grounding role.

[0097] In this embodiment, the power state display module 11 can directly display the input, output voltage, output current, output power, output capacity and output time, and can be adjusted by the multifunctional knob on the right side of the display screen. It is accurate, fast, has step-down output, and can be adjusted arbitrarily within the range of 0-50.00V for output voltage and 0-20.00A for limiting current.

[0098] In this embodiment, the battery state display module 12 can directly display the remaining battery capacity, battery voltage and battery temperature, and has temperature abnormality alarm and low capacity alarm functions.

[0099] In this embodiment, the operation handle module 13 is formed by 3D printing, and is made of PLA material, which has good insulation performance and tensile strength of 33-55 MPa. The upper and lower shells are sealed with silica gel, and all buttons, indicator lights, knobs and cable connectors on the operation handle module 13 are waterproof devices, so that the operation handle module 13 has certain waterproof performance. The lower shell of the operation handle module 13 is designed with an ergonomic groove, which optimizes the overall length and thickness of the operation handle module 13, and is convenient for workers to hold. The handle buttons and indicator lights are simple and clear, and are provided with Chinese marks. The "emergency stop button 13.5" is eye-catching and close to the thumb position, so that the "emergency stop button" can be pressed at the fastest speed to prevent safety accidents. The speed knob 13.4 is designed with an enlarged knob cap, and a scale dial is arranged under the knob, so that the operation is more intuitive and accurate. The operation handle buttons are shown in detail in Figure 4 .

[0100] In this embodiment, the switching power supply 16 can provide 220V to 24V output voltage for the device, and the output power is 400W. The rated power of the landing gear actuator driving motor is 250W, and the switching power supply 16 can fully meet the power requirement, and has overload protection, overvoltage protection and short circuit protection functions, and is mature, safe and reliable in performance.

[0101] As shown in Figure 2 , in this embodiment, when the device is connected to the external power supply socket, the direct current preferentially passes through the power supply switching intermediate relay 17, so that the device automatically switches to the external power supply mode, disconnects all electrical appliances from the internal battery pack 5 and charges the battery pack 5, and realizes internal and external power supply isolation. Therefore, when the built-in battery pack 5 of the device is used for power supply, it cannot be charged. Similarly, when the battery pack 5 is charged, the battery pack 5 cannot supply power, thereby prolonging the service life of the battery pack 5.

[0102] In this embodiment, the forward rotation intermediate relay 18 and the reverse rotation intermediate relay 19 are designed with a double interlocking circuit. When the "collection start button 13.3" is pressed, the circuit is connected to drive the motor in the forward direction, the normally open contact of the forward rotation intermediate relay 18 is closed, the normally closed contact is disconnected, the reverse rotation intermediate relay 19 coil cannot be powered, and the forward and reverse rotation actions cannot be performed at the same time, so as to prevent short circuit accidents. When the locking trigger in-place sensor of the actuator cylinder is reached, the forward and reverse rotation self-locking circuit is cut off, and automatic stopping in place is realized.

[0103] In this embodiment, the power tube radiator 21 can be automatically started according to the temperature of the power tube, and can effectively dissipate heat and reduce the temperature of the key device in the high-power use scene.

[0104] In this embodiment, the current limiting and voltage stabilizing module 22 adopts synchronous rectification technology, and the conversion efficiency is as high as 90% or more. It has multiple software protection mechanisms, and the protection threshold is adjustable. The module automatically closes the output when the working parameters exceed the protection threshold. It has a soft start function, and the input under-voltage protection threshold is adjustable from 5.8 to 50V. The output over-voltage protection threshold is adjustable from 0 to 51V. The output over-current protection threshold is adjustable from 0 to 20.1A. The timeout working protection is adjustable from 0 to 100h, and it is also closed. The parameters can be quickly adjusted on the power consumption status display module 11, and the parameters are displayed on the power consumption status display module 11.

[0105] In this embodiment, the insulating elevated column is processed and formed by 3D printing, and is made of PLA material. It has good insulation performance and good tensile strength of 33-55Mpa, which meets the physical performance required by the insulating elevated column of the application.

[0106] As shown in Figure 3 In this embodiment, the over-current protection module 24 can detect a current of 0-10A with a detection accuracy of 0.01A. The maximum current threshold can be set to 0-10A, and when the current reaches the threshold, the relay is disconnected, so that the current cannot enter the key electrical modules such as the electronic speed controller 26, the current limiting and voltage stabilizing module 22, the forward intermediate relay 18, and the reverse intermediate relay 19, thereby protecting the safety of the electric landing gear retraction controller and the landing gear actuator cylinder drive motor. The current threshold, automatic reset of current reduction, and reset after restart can be set through the buttons on the over-current protection module 24.

[0107] Continuing to refer to Figure 3 In this embodiment, the limit relay 25 can identify the signals fed back by the upper and lower position lock sensors of the landing gear and control whether the intermediate relay coil, the position indication lamp, and the status indication lamp in the circuit are powered, thereby achieving the functions of self-stopping at the position, status indication, and position indication.

[0108] Continuing to refer to Figure 3 In this embodiment, the electronic speed controller 26 adopts a powerful and high-performance MCU, which has the characteristics of strong anti-interference, high efficiency, low heating, and smooth speed regulation. It has good power-on safety, and will not start the motor immediately after the power is turned on, regardless of the duty cycle of PWM. It supports mobile phone APP programming and real-time data detection functions.

[0109] The electrical working principle of the embodiment: a portable electric landing gear retraction controller is powered by the internal lithium ion battery pack 5 for the inductive electronic speed controller 26 and the intermediate relay, the output of which is supplied to the drive motor on the actuating cylinder after the total switch 14, the overcurrent protection module 24 and the current limiting and voltage stabilizing module 22, the drive motor of the actuating cylinder adopts double interlocking circuit for forward and reverse rotation control, when the "retraction start button 13.3" is pressed, the circuit is connected to the drive motor for forward rotation, the intermediate relay 18 is closed by the normally open contact, the normally closed contact is disconnected, the reverse rotation intermediate relay 19 cannot be powered, so that the forward and reverse rotation cannot be performed at the same time, which is to prevent short circuit accident. When the on-lock trigger to the position sensor on the actuating cylinder is reached, the forward and reverse rotation self-locking circuit is cut off, the automatic stop to the position is realized, when the external power supply is used, the equipment is automatically switched to the external power supply mode, the power supply switching intermediate relay 17 disconnects the connection of all electric appliances with the internal battery pack 5 and charges the battery pack 5, and the external power supply indicator light 10 and the charging indicator light are lit.

[0110] The operation process of the present application is:

[0111] I. Turn on the total switch 14 of the equipment;

[0112] II. Connect the controller cable in the box with the actuating cylinder cable;

[0113] III. Check whether the instrument current is in the normal range (0-0.2A), check whether the internal battery voltage is in the range of 21.6V-25.2V, if the power is too low or the low voltage alarm sounds, the external power supply mode should be used;

[0114] IV. After all the preparations are confirmed to be correct, hold the operating handle module, press the "retraction start button 13.3", at this time, the "retraction" operation corresponds to the running indicator light, the landing gear does not move, rotate the "rotation speed knob 13.4" to accelerate the retraction of the landing gear, when the rated speed is reached, the speed is uniform, the landing gear is locked and automatically powered off after reaching the position, the retraction state indicator light 13.2 is extinguished, and the retraction position indicator light 13.1 is lit;

[0115] V. If an emergency occurs, press the "emergency stop button 13.5" quickly, the landing gear will stop moving immediately, and the "rotation speed knob 13.4" should be returned to zero for inspection;

[0116] VI. After each retraction operation is completed, the "rotation speed knob 13.4" should be returned to zero after the equipment is used, which is to improve the operation safety through the controller self-checking.

[0117] It should be noted that for different products, the equipment size should be adjusted, the function modules should be increased or reduced, and the corresponding electrical connectors should be selected before using the present application, so as to meet the specific requirements of product use.

[0118] Having described various embodiments of the application, it is to be understood that the above description is meant to be illustrative only, and that many modifications and variations of the embodiments are possible without departing from the scope and spirit of the described embodiments. Many modifications and variations of the described embodiments are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the described embodiments can be practiced otherwise than as specifically described.

Claims

1. A portable electrically powered landing gear retraction controller comprising an upper case cover and a lower case cover, said upper case cover and said lower case cover being hingedly connected, characterized in that, Also comprising: a fixed plate fixed on the lower cover of the box; a power supply module and a main controller module located on the fixed plate, the power supply module being electrically connected with the main controller module; a switch panel fixedly connected with the fixed plate through a copper riser; a socket fixed on the upper cover of the box, the socket being electrically connected with the power supply module; a fault protection indicator and a power supply indicator fixed on the upper cover of the box, the fault protection indicator being electrically connected with the main controller module, and the power supply indicator being electrically connected with the power supply module; a power consumption state display module and a battery state display module fixed on the upper cover of the box, the battery state display module being connected with the power supply module, and the power consumption state display module being connected with the main controller module; an operation handle module electrically connected with the main controller module through a first cable to send a control instruction to the main controller module; the main controller module being electrically connected with an actuator cylinder of a UAV landing gear through a second cable and controlling the actuator cylinder to act according to the control instruction to drive the landing gear to complete the retraction and extension state; the UAV landing gear being provided with an upper position lock sensor and a lower position lock sensor, the main controller module controlling the actuator cylinder to act according to the control instruction to drive the landing gear to complete the retraction and extension state, which specifically comprises: the main controller module controlling the driving motor of the actuator cylinder to rotate to drive the landing gear to move up and down according to the control instruction; when the landing gear is retracted or lowered to the position and locked, the main controller module controls the driving motor to stop rotating to realize the retraction and extension state of the landing gear after receiving the position signal fed back by the upper position lock sensor or the lower position lock sensor of the landing gear; the main controller module comprising: an overcurrent protection module for comparing the current input by the power supply module with a set threshold value, disconnecting the current if the input current is higher than the set threshold value, and outputting the current if the input current is lower than the set threshold value; a current limiting and voltage stabilizing module for stabilizing the current output by the overcurrent protection module; an electronic speed regulator for transforming the current output by the current limiting and voltage stabilizing module into the current for the driving motor to run; an intermediate relay including a forward rotation intermediate relay and a reverse rotation intermediate relay, the forward rotation intermediate relay being used for forward rotation control of the current transformed by the electronic speed regulator, and the reverse rotation intermediate relay being used for reverse rotation control of the current transformed by the electronic speed regulator; the forward rotation intermediate relay and the reverse rotation intermediate relay including a double interlocking circuit with a limit switch; a limit relay for identifying the position signal fed back by the upper position lock sensor or the lower position lock sensor of the landing gear and controlling the action state of the intermediate relay; The power supply module includes an external power supply module and an internal power supply module, the external power supply module includes a switching power supply, a charger, a battery pack and a power supply switching intermediate relay; The switching power supply is connected with the socket and the charger respectively, the charger is connected with the power supply switching intermediate relay, and the power supply switching intermediate relay is connected with the battery pack; The battery state display module is connected with the battery pack in parallel, and the power consumption state display module is connected with the current limiting voltage stabilizing module in parallel; The operation handle module includes a received position indicating lamp, a folding state indicating lamp, a folding start button, a rotating speed knob, an emergency stop button, a placed position indicating lamp, a release state indicating lamp and a placing start button; The received position indicating lamp, the folding state indicating lamp, the folding start button, the rotating speed knob, the emergency stop button, the placed position indicating lamp, the release state indicating lamp and the placing start button are electrically connected with the main controller module through the first cable.

2. The controller of claim 1, wherein, The power supply indicating lamp includes an internal power supply indicating lamp and an external power supply indicating lamp, the external power supply indicating lamp is connected with the internal power supply indicating lamp at both ends of the power supply switching intermediate relay, and the internal power supply indicating lamp and the external power supply indicating lamp are disconnected through the power supply switching intermediate relay.

3. The controller of claim 1, wherein, The switching power supply is provided with a power supply radiator, and the main controller module is provided with a power tube radiator.

4. The controller of claim 1, wherein, The charger is coated with heat-conducting silicone grease at the bonding position of the charger and the switching panel.

5. The controller of claim 1, wherein, The fixing plate is fixedly connected with the lower cover of the box body through hexagonal cylindrical head metal screws, and the metal screws are partially exposed from the lower cover of the box body.

6. The controller of claim 5, wherein, The socket is provided with an overheat fusing type fuse and a switch, and is grounded through the metal screw.

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