Safety protection device for multi-rotor unmanned aerial vehicle

Abstract

The utility model discloses a multi-rotor unmanned aerial vehicle safety protection device which comprises a U-shaped installation plate fixedly installed at the bottom of a multi-rotor unmanned aerial vehicle, a PLC, an acceleration sensor and a micro-electro-mechanical gyroscope are fixedly installed on the inner wall of the bottom of the U-shaped installation plate, the acceleration sensor and the micro-electro-mechanical gyroscope are both electrically connected with the PLC, and the PLC is electrically connected with the acceleration sensor and the micro-electro-mechanical gyroscope. And an electric control valve electrically connected with the PLC is fixedly mounted at the bottom of the U-shaped mounting plate. By arranging a series of structures, the air bag can be automatically inflated for expansion work when the multi-rotor unmanned aerial vehicle falls, and the expansion of the air bag is matched with the flexibility of the air bag, so that flexible buffering can be achieved at the bottom, and floating supporting and sinking prevention can be achieved when the multi-rotor unmanned aerial vehicle falls into water; and the overall safety and anti-lost performance of personnel below and the multi-rotor unmanned aerial vehicle are improved, the multiple arc-shaped light floating covers can be integrally driven to be outwards expanded and moved out to slow down the descending speed during descending, and the damage risk is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-rotor unmanned aerial vehicle protection, in particular to a multi-rotor unmanned aerial vehicle safety protection device. Background Art

[0002] In recent years, benefiting from the development of the industry and strong support from national policies, my country's drone industry has achieved rapid development. According to data from the Civil Aviation Administration, as of the end of 2021, there were 832,000 registered drones in the industry, an increase of 315,000 from 2020, a year-on-year increase of 61%. Multi-rotor drones are a commonly used type of drone. Multi-rotor drones have the characteristics of light weight, small payload, low flight speed, and multi-axis rotors that continue to rotate during flight. With the extensive use of drones in production and life, the safety issues of drones have become increasingly prominent.

[0003] In the past, the safety devices of multi-rotor UAVs focused on protecting the UAVs themselves, even though the existing technology has landing protection measures such as spring legs at the bottom; however, there are the following disadvantages when using them: 1. When the multi-rotor UAV loses control and falls, it cannot automatically perform soft floating at the bottom. If it accidentally hits people below, it is easy to cause serious personal injury due to the hard bottom structure. If it accidentally falls into a water area, it is easy to sink and get lost, and its safety is not ideal. 2. There is a lack of a structure that automatically reduces the falling speed when falling. In view of this, we propose a safety protection device for multi-rotor UAVs. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-rotor UAV safety protection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-rotor drone safety protection device, comprising a U-shaped mounting plate fixedly mounted on the bottom of the multi-rotor drone, a PLC controller, an acceleration sensor and a micro-electromechanical gyroscope fixedly mounted on the bottom inner wall of the U-shaped mounting plate, the acceleration sensor and the micro-electromechanical gyroscope are both electrically connected to the PLC controller, and are mounted and fixed on the bottom of the multi-rotor drone using the U-shaped mounting plate. When the multi-rotor drone fails and falls, the micro-electromechanical gyroscope is used to detect an abnormal motion posture, the acceleration sensor will detect an abnormal acceleration, the PLC controller collects data detected by both, and when the abnormal data value exceeds a maximum preset value, it is judged that the multi-rotor drone is in a motion abnormal fault falling state; wherein the principle that the micro-electromechanical gyroscope and the acceleration sensor respectively detect the motion posture and the falling speed is a prior art, and is also widely used in existing drones, and will not be further elaborated on;

[0006] An electric control valve electrically connected to the PLC controller is fixedly installed at the bottom of the U-shaped mounting plate, a circular support plate is fixedly sleeved on the outer side of the air outlet of the electric control valve, an air bag connected and fixed to the bottom end of the electric control valve is adhesively fixed to the bottom of the circular support plate, two compressed gas cylinders are fixedly installed at the bottom of the U-shaped mounting plate, the exhaust ports of the two compressed gas cylinders are respectively connected and fixed to the two sides of the air inlet of the electric control valve, and a return air component connected to the air bag and the exhaust ports of the two compressed gas cylinders is fixedly installed on the top of the circular support plate, and the return air component is electrically connected to the PLC controller; the PLC controller is used to control the opening of the electric control valve when the received abnormal data value exceeds the maximum preset value, and the compressed gas in the two compressed gas cylinders is quickly filled into the air bag by opening the electric control valve, and the expansion of the air bag is used to buffer and unload the force at the bottom when falling, so as to prevent the direct hard impact on the personnel and cause serious injuries, and the expanded air bag can play a floating support and anti-sinking effect when falling on the water surface, and the return air component is used to extract the gas in the air bag after use and pump it into the two compressed gas cylinders for compression;

[0007] A plurality of arc-shaped lightweight floating covers are arranged in a circular shape at equal intervals on the outer side of the top of the circular support plate, and a plurality of slide grooves are opened in a circular shape at equal intervals on the outer side of the circular support plate. An inflatable self-expanding component connected to the airbag is installed in the slide groove. The inflatable self-expanding component is fixedly connected to the outer side of the corresponding arc-shaped lightweight floating cover. The inflatable self-expanding component is used to drive the plurality of arc-shaped lightweight floating covers to expand and move out synchronously when gas is filled in the airbag, and the relative force generated by the plurality of arc-shaped lightweight floating covers and the air when the moved out arc-shaped lightweight floating covers move downward can slow down the descent speed when descending.

[0008] Preferably, the air return assembly includes a circular tube fixedly connected to the top of the circular support plate, the electric control valve is located in the circular tube and has no contact with the inner side of the circular tube, both sides of the top of the circular tube are connected and fixed with air return pipes, the top of the air return pipe is connected and fixed to the bottom of the corresponding compressed gas cylinder exhaust port, a small compression pump is fixedly connected to the top of the circular support plate, the air outlet of the small compression pump is connected and fixed to the left side of the circular tube, the air inlet of the small compression pump extends into the airbag, and the small compression pump is electrically connected to the PLC controller.

[0009] Preferably, the inflatable self-expanding component includes a piston sealingly and slidingly sleeved in a corresponding slide groove, the piston is fixedly connected to an L-shaped rod on the side away from the electric control valve, a positioning seat is fixedly sleeved in the slide groove, the positioning seat sealingly and slidingly sleeved on the corresponding L-shaped rod, the side wall of the L-shaped rod is fixedly connected to the side of the corresponding arc-shaped lightweight floating cover away from the electric control valve, a ventilation pipe is embedded and fixed on the bottom inner wall of the slide groove, and the bottom end of the ventilation pipe extends into the airbag.

[0010] Preferably, two bolt mounting through holes are provided on both sides of the top of the U-shaped mounting plate.

[0011] Preferably, a sealing ring is provided on the outer adhesive sleeve of the piston, and the outer side of the sealing ring is in sliding contact with the inner wall of the corresponding sliding groove.

[0012] Preferably, a rectangular through hole is opened on one side of the positioning seat, and a rectangular sealing rubber sleeve is provided in the rectangular through hole, and the inner wall of the rectangular sealing rubber sleeve is in sliding contact with the outer side of the corresponding L-shaped rod.

[0013] Preferably, the plurality of ventilation tubes are located between the plurality of pistons.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This multi-rotor drone safety protection device can automatically inflate the airbag when the multi-rotor drone falls through the cooperation of the PLC controller, micro-electromechanical gyroscope, acceleration sensor, electric control valve, compressed gas cylinder, round support plate and airbag. The airbag can be used to buffer the bottom and float and support the drone to prevent it from sinking when it falls into the water by using the expansion of the airbag and its own flexibility. It can also effectively reduce the damage to people when it accidentally hits people, thereby improving the overall safety and anti-loss performance of the people below and the multi-rotor drone.

[0016] 2. This multi-rotor UAV safety protection device, through the cooperation of the airbag, the inflatable self-expanding component and the arc-shaped light floating cover, can use the rushing gas to drive multiple arc-shaped light floating covers to expand and move outwards in an integrated manner when falling, and use the relative force generated by the multiple arc-shaped light floating covers when moving downwards and the air to slow down the descent speed during descent, further reducing the risk of damage;

[0017] 3. This multi-rotor UAV safety protection device, through the cooperation of the air return assembly, air bag and compressed gas cylinder, can extract the gas in the air bag after use and refill it into the compressed gas cylinder for reuse.

[0018] The utility model is provided with a series of structures, which is convenient for automatically inflating the airbag when the multi-rotor drone falls. The expansion of the airbag and its own flexibility can play a flexible buffer at the bottom and provide floating support to prevent sinking when falling into the water, thereby improving the overall safety and anti-loss performance of the personnel below and the multi-rotor drone, and is convenient for integrally driving multiple arc-shaped lightweight floating covers to expand and move outward when falling to slow down the descent speed, thereby further reducing the risk of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a multi-rotor UAV safety protection device proposed by the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the left view structure;

[0021] Figure 3 This is a schematic diagram of the main cross-sectional structure of a multi-rotor UAV safety protection device proposed by the utility model;

[0022] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A in the figure.

[0023] In the figure: 1. U-shaped mounting plate; 2. MEMS gyroscope; 3. PLC controller; 4. Acceleration sensor; 5. Electric control valve; 6. Round support plate; 7. Air bag; 8. Return air pipe; 9. Ring pipe; 10. Small compression pump; 11. Compressed gas cylinder; 12. Arc-shaped lightweight floating cover; 13. Slide; 14. Ventilation pipe; 15. Piston; 16. Positioning seat; 17. L-shaped rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 4 As shown, a multi-rotor UAV safety protection device proposed in this embodiment includes a U-shaped mounting plate 1 fixedly mounted on the bottom of the multi-rotor UAV, a PLC controller 3, an acceleration sensor 4 and a micro-electromechanical gyroscope 2 are fixedly mounted on the bottom inner wall of the U-shaped mounting plate 1, the acceleration sensor 4 and the micro-electromechanical gyroscope 2 are both electrically connected to the PLC controller 3, two bolt mounting through-holes are provided on both sides of the top of the U-shaped mounting plate 1, and the provided bolt mounting through-holes are used for personnel to install and fix the U-shaped mounting plate 1 to the bottom of the multi-rotor UAV through external bolts, and the U-shaped mounting plate 1 is installed and fixed on the bottom of the multi-rotor UAV. When the multi-rotor UAV fails and falls, the micro-electromechanical gyroscope 2 is used to detect an abnormal motion posture, the acceleration sensor 4 will detect an abnormal acceleration, and the PLC controller 3 collects the data detected by the two, and determines that the multi-rotor UAV is in a motion abnormal fault falling state when the abnormal data value exceeds the maximum preset value;

[0026] The principle of the micro-electromechanical gyroscope 2 and the acceleration sensor 4 detecting the motion posture and the falling speed respectively is a prior art and is also widely used in existing drones, so it will not be further elaborated.

[0027] An electric control valve 5 electrically connected to the PLC controller 3 is fixedly installed at the bottom of the U-shaped mounting plate 1, a circular support plate 6 is fixedly sleeved on the outer side of the air outlet of the electric control valve 5, wherein the top of the circular support plate 6 is provided with a sleeve hole fixedly connected to the outer side of the air outlet of the electric control valve 5, an air bag 7 connected and fixed to the bottom end of the electric control valve 5 is adhesively fixed to the bottom of the circular support plate 6, two compressed gas cylinders 11 are fixedly installed at the bottom of the U-shaped mounting plate 1, the exhaust ports of the two compressed gas cylinders 11 are respectively connected and fixed to the two sides of the air inlet of the electric control valve 5, and a gas bag 7 connected to the exhaust ports of the two compressed gas cylinders 11 is fixedly installed on the top of the circular support plate 6. The air return component is electrically connected to the PLC controller 3; the PLC controller 3 is used to control the electric control valve 5 to open when the received abnormal data value exceeds the maximum preset value, and the electric control valve 5 is opened to allow the compressed gas in the two compressed gas cylinders 11 to quickly fill the airbag 7, and the airbag 7 is expanded to buffer and unload the force at the bottom when falling, so as to prevent the direct hard impact on the personnel and cause serious injuries, and the expanded airbag 7 can play a floating support and prevent sinking effect when falling on the water surface. The air return component is used to extract the gas in the airbag 7 after use and pump it to compress it into the two compressed gas cylinders 11;

[0028] A plurality of arc-shaped lightweight floating covers 12 are arranged in a circular shape at equal intervals on the outer side of the top of the circular support plate 6. A plurality of slide grooves 13 are opened in a circular shape at equal intervals on the outer side of the circular support plate 6. An inflatable self-expanding component connected to the airbag 7 is installed in the slide groove 13. The inflatable self-expanding component is fixedly connected to the outer side of the corresponding arc-shaped lightweight floating cover 12. The inflatable self-expanding component is used to drive the plurality of arc-shaped lightweight floating covers 12 to expand and move out synchronously when gas is filled in the airbag 7. The relative force generated by the plurality of arc-shaped lightweight floating covers 12 and the air when they move downward can slow down the descent speed when descending.

[0029] Specifically, the air return assembly includes a loop tube 9 fixedly connected to the top of the circular support plate 6, the electric control valve 5 is located in the loop tube 9 and does not contact the inner side of the loop tube 9, the two sides of the top of the loop tube 9 are connected and fixed with the air return tube 8, the top of the air return tube 8 is connected and fixed with the bottom of the corresponding compressed gas cylinder 11 exhaust port, and a small compression pump 10 is fixedly connected to the top of the circular support plate 6, the air outlet of the small compression pump 10 is connected and fixed with the left side of the loop tube 9, the air inlet of the small compression pump 10 extends into the air bag 7, and the small compression pump 10 is electrically connected to the PLC controller 3; the loop tube 9, the air return tube 8 and the small compression pump 10 are arranged to cooperate, and the small compression pump 10 is used to extract the gas in the air bag 7 and pump it into the loop tube 9, and the gas is compressed and refilled into the two compressed gas cylinders 11 through the two air return tubes 8.

[0030] Furthermore, the inflatable self-expansion component includes a piston 15 which is sealingly and slidably sleeved in the corresponding slide groove 13, wherein the outer adhesive sleeve of the piston 15 is provided with a sealing ring, and the outer side of the sealing ring is in sliding contact with the inner wall of the corresponding slide groove 13, so as to achieve the effect of sliding sealing between the outer side of the piston 15 and the inner wall of the corresponding slide groove 13, and the side of the piston 15 away from the electric control valve 5 is fixedly connected with an L-shaped rod 17, and the fixed sleeve in the slide groove 13 is provided with a positioning seat 16, and the positioning seat 16 is sealingly and slidably sleeved on the corresponding L-shaped rod 17, wherein one side of the positioning seat 16 is provided with a rectangular through-hole, and the adhesive sleeve in the rectangular through-hole is provided with a rectangular sealing rubber sleeve, and the inner wall of the rectangular sealing rubber sleeve is in sliding contact with the outer side of the corresponding L-shaped rod 17, so as to achieve the effect of transversely guiding the L-shaped rod 17 and slidingly sealing the outer side, and the side wall of the L-shaped rod 17 is fixedly connected with the side of the corresponding arc-shaped lightweight floating cover 12 away from the electric control valve 5, and a ventilation pipe 14 is embedded and fixed on the bottom inner wall of the slide groove 13, and the ventilation pipe 14 The bottom end extends into the airbag 7, wherein the top of the airbag 7 is provided with a plurality of through holes which are respectively bonded and fixed to the outer sides of the corresponding ventilation pipes 14, so as to allow the ventilation pipes 14 to pass through, and the plurality of ventilation pipes 14 are all located between the plurality of pistons 15; the provided pistons 15, L-shaped rods 17, ventilation pipes 14 and positioning seats 16 cooperate with each other, and when the gas rushes into the airbag 7, the gas will also be filled into the plurality of slide grooves 13, and squeeze and drive the plurality of pistons 15 to move outward, and the plurality of pistons 15 drive the plurality of L-shaped rods 17 to move outward, and the plurality of arc-shaped lightweight floating covers 12 are driven to expand and move out synchronously outward by the plurality of L-shaped rods 17, so as to achieve the effect of integrated expansion during inflation, and when the gas in the subsequent airbag 7 is extracted, a suction force will also be formed in the plurality of slide grooves 13, and under the suction force, the plurality of pistons 15 move back inward and drive the plurality of arc-shaped lightweight floating covers 12 to shrink inward and move back to the top of the circular support plate 6 through the plurality of L-shaped rods 17, so as to release the external expansion buoyancy deceleration state used for falling.

[0031] The method of using this embodiment is as follows: a person fixes the U-shaped mounting plate 1 on the bottom of the multi-rotor drone through external bolts. When the multi-rotor drone fails and falls, the micro-electromechanical gyroscope 2 detects an abnormal motion posture, and the acceleration sensor 4 detects an abnormal acceleration. The PLC controller 3 collects the data detected by the two, and controls the electronic control valve 5 to open when the abnormal data value exceeds the maximum preset value. At this time, the compressed gas in the two compressed gas cylinders 11 is quickly filled into the airbag 7 through the electronic control valve 5, so that the airbag 7 expands. Since the airbag 7 is flexible, under its expansion action, the bottom is flexible as a whole, which can play the role of flexible buffer support at the bottom when falling, and its flexibility can effectively reduce the damage to personnel when accidentally hitting personnel, thereby improving the safety of personnel below, and when accidentally falling into the water, the expanded airbag 7 can be used to perform floating support work on the water surface to avoid the phenomenon of overall sinking into the water and causing loss, thereby improving the safety of the multi-rotor drone itself;

[0032] When the gas rushes into the airbag 7, the gas will also be filled into the multiple slide grooves 13, and the gas pressure squeezes and drives the multiple pistons 15 to move outward. The multiple pistons 15 drive the multiple L-shaped rods 17 to slide outward in the multiple positioning seats 16, and the multiple L-shaped rods 17 are used to drive the multiple arc-shaped lightweight floating covers 12 to expand and move out synchronously, so as to achieve the effect of integrated expansion during inflation. The relative force generated by the multiple arc-shaped lightweight floating covers 12 when they move downward and the air can slow down the descent speed during descent, thereby further reducing the risk of damage.

[0033] After subsequent use, the personnel operate the PLC controller 3 to control the electric control valve 5 to close, and control the small compression pump 10 to open. The small compression pump 10 extracts the gas in the airbag 7 and pumps it into the loop pipe 9. The gas is refilled and compressed into two compressed gas cylinders 11 through two return pipes 8, and can continue to be recycled.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-rotor drone safety protection device, comprising a U-shaped mounting plate (1) fixedly mounted on the bottom of the multi-rotor drone, characterized in that: A PLC controller (3), an acceleration sensor (4) and a micro-electromechanical gyroscope (2) are fixedly mounted on the inner wall of the bottom of the U-shaped mounting plate (1), and the acceleration sensor (4) and the micro-electromechanical gyroscope (2) are both electrically connected to the PLC controller (3); An electric control valve (5) electrically connected to the PLC controller (3) is fixedly mounted on the bottom of the U-shaped mounting plate (1); a circular support plate (6) is fixedly sleeved on the outer side of the air outlet of the electric control valve (5); an air bag (7) connected and fixed to the bottom of the electric control valve (5) is adhesively fixed to the bottom of the circular support plate (6); two compressed gas cylinders (11) are fixedly mounted on the bottom of the U-shaped mounting plate (1); the exhaust ports of the two compressed gas cylinders (11) are respectively connected and fixed to the two sides of the air inlet of the electric control valve (5); a return air component connected to the air bag (7) and the exhaust ports of the two compressed gas cylinders (11) is fixedly mounted on the top of the circular support plate (6); and the return air component is electrically connected to the PLC controller (3); The outer side of the top of the circular support plate (6) is provided with a plurality of arc-shaped light floating covers (12) at equal intervals in a circular shape, and the outer side of the circular support plate (6) is provided with a plurality of slide grooves (13) at equal intervals in a circular shape, and an inflatable self-expanding component connected to the airbag (7) is installed in the slide groove (13), and the inflatable self-expanding component is fixedly connected to the outer side of the corresponding arc-shaped light floating cover (12).

2. A multi-rotor drone safety protection device according to claim 1, characterized in that: The air return assembly comprises a circular tube (9) fixedly connected to the top of the circular support plate (6); the electric control valve (5) is located in the circular tube (9) and does not contact the inner side of the circular tube (9); both sides of the top of the circular tube (9) are connected and fixed with air return tubes (8); the top of the air return tube (8) is connected and fixed with the bottom of the exhaust port of the corresponding compressed gas cylinder (11); the top of the circular support plate (6) is fixedly connected with a small compression pump (10); the air outlet of the small compression pump (10) is connected and fixed with the left side of the circular tube (9); the air inlet of the small compression pump (10) extends into the air bag (7); and the small compression pump (10) is electrically connected to the PLC controller (3).

3. A multi-rotor drone safety protection device according to claim 2, characterized in that: The inflatable self-expanding component comprises a piston (15) which is sealingly slidably sleeved in a corresponding slide groove (13); the piston (15) is fixedly connected to an L-shaped rod (17) on a side away from the electric control valve (5); a positioning seat (16) is fixedly sleeved in the slide groove (13); the positioning seat (16) is sealingly slidably sleeved on the corresponding L-shaped rod (17); the side wall of the L-shaped rod (17) is fixedly connected to a side of the corresponding arc-shaped lightweight floating cover (12) away from the electric control valve (5); a ventilation pipe (14) is embedded and fixed on the bottom inner wall of the slide groove (13); and the bottom end of the ventilation pipe (14) extends into the airbag (7).

4. A multi-rotor drone safety protection device according to claim 1, characterized in that: Two bolt installation through holes are provided on both sides of the top of the U-shaped installation plate (1).

5. The multi-rotor drone safety protection device according to claim 3, characterized in that: The outer bonding sleeve of the piston (15) is provided with a sealing ring, and the outer side of the sealing ring is in sliding contact with the inner wall of the corresponding sliding groove (13).

6. A multi-rotor UAV safety protection device according to claim 3, characterized in that: A rectangular through hole is formed on one side of the positioning seat (16), and a rectangular sealing rubber sleeve is provided in the rectangular through hole. The inner wall of the rectangular sealing rubber sleeve is in sliding contact with the outer side of the corresponding L-shaped rod (17).

7. A multi-rotor UAV safety protection device according to claim 3, characterized in that: The plurality of ventilation pipes (14) are located between the plurality of pistons (15).

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