Fire safety detection device based on multi-rotor unmanned aerial vehicle

Abstract

The invention provides a fire safety detection device based on a multi-rotor unmanned aerial vehicle, and relates to the technical field of multi-rotor unmanned aerial vehicles, the fire safety detection device comprises a fuselage, a controller is arranged in the fuselage, a mounting rack is arranged in the fuselage, the controller is located in the middle of the mounting rack, the mounting rack is fixedly connected with a servo motor, and the servo motor is located in the middle of the fuselage. The outer side of the fuselage is fixedly connected with a set of limiting rods in an annular array, supporting rods are arranged in sliding grooves of the limiting rods, telescopic assemblies are arranged on the supporting rods and used for changing the width of the unmanned aerial vehicle, and a cleaning assembly is arranged on the fuselage and used for cleaning the unmanned aerial vehicle. The cleaning assembly is used for cleaning stains on the protective glass cover on the periphery of the detection lens. By arranging the telescopic assembly and the cleaning assembly, when the unmanned aerial vehicle is used, an operator can control the unmanned aerial vehicle to pass through a narrower area and can clean the detection lens in time, so that a picture returned by the unmanned aerial vehicle is kept clear.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-rotor unmanned aerial vehicles, and in particular to a fire safety detection device based on a multi-rotor unmanned aerial vehicle. Background Art

[0002] Drones play an important role in fire safety detection. They are flexible and maneuverable, can quickly reach the fire scene, and provide accurate fire information, providing strong support for firefighting and rescue.

[0003] The existing Chinese invention patent application CN108820195A provides a fire detection system and method based on a multi-rotor drone. The fire detection system includes ground control equipment, a multi-rotor drone, a camera, a detection bomb launcher, a detection bomb, and an information transfer device; the multi-rotor drone carries the detection bomb and flies to the vicinity of the fire point, and then launches the detection bomb to the center of the fire to detect the fire completely and in detail, so as to maximize the detection of the fire, which is conducive to the formulation and implementation of the most effective fire extinguishing plan and to ensure the safety of firefighters. By dropping the detection bomb into the center of the fire, although fire information within a certain range can be collected, the center of the fire is not only high in temperature, which is easy to damage the equipment, but also the landing point of the detection bomb is not easy to determine, and is greatly affected by the terrain, so the detection range is limited, and the detection area is small, which is not conducive to information collection. When the operator collects information on the fire scene through the drone camera, when using it in certain specific places, it is difficult for the drone to pass through the narrow area due to the complex environment of the fire scene. At the same time, during the flight of the drone, due to the heavy smoke and dust at the fire scene, it is difficult for the operator to clean the dust at the fire scene on the drone camera in time, which will affect the image quality of the images transmitted back by the drone.

[0004] Therefore, it is necessary to study a fire safety detection device that can pass through narrow areas and clean dust on the camera in time, and apply it to fire scenes with complex environments. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fire safety detection device based on a multi-rotor drone to solve the problem that the drone is difficult to pass through narrow areas due to the complex fire scene environment, and the operator is difficult to clean the dust at the fire scene on the camera in time, which affects the quality of the pictures transmitted back by the drone.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A fire safety detection device based on a multi-rotor drone comprises a fuselage, a controller is arranged inside the fuselage, a mounting frame is arranged inside the fuselage, the controller is located in the middle of the mounting frame, a servo motor is fixedly connected to the mounting frame, a group of limit rods in an annular array are fixedly connected to the outside of the fuselage, a support rod is arranged in the slide groove of the limit rod, a rotor is arranged at one end of the support rod, an upper limit plate is fixedly connected to the other end of the support rod, the upper limit plate is fixedly connected to the lower limit plate, the bottom of the lower limit plate is slidably connected to the vortex plate, and the vortex The rotary plate is fixedly connected to the synchronous plate, and the synchronous plate is rotatably connected to the mounting frame. A group of evenly spaced serrated structures are provided on the peripheral side of the synchronous plate, and the synchronous plate is meshed with the servo motor through the serrated structure. A parking frame is fixedly connected to the bottom of the fuselage, a detection lens is provided in the middle of the bottom of the fuselage, and a protective glass cover is provided on the peripheral side of the detection lens. A telescopic component is provided on the support rod, and the telescopic component is used to change the width of the drone. A cleaning component is provided on the fuselage, and the cleaning component is used to clean stains on the protective glass cover around the detection lens.

[0007] Optionally, the telescopic assembly includes an inclined portion, a sliding portion is provided on one side of the inclined portion, the inclined portion includes a first hydraulic rod, the first hydraulic rod is connected to the second hydraulic rod through a hose, and the sliding portion includes a clamping block, one side of the clamping block is connected to the fixed block through a limit spring.

[0008] Optionally, the rotor is rotatably connected to one end of the support rod, a slide plate is provided at the bottom of the rotor, a slider is slidably connected to the slide plate, and one side of the slider is rotatably connected to the movable end of the first hydraulic rod.

[0009] Optionally, the fixed block is fixedly connected to the inside of the limiting rod, a clamping block is clamped at the opening of the limiting rod slide slot, one side of the clamping block is connected to the movable end of the second hydraulic rod, and the second hydraulic rod is fixedly connected to the support rod.

[0010] Optionally, the cleaning assembly includes a power unit, which is meshed with a driven ring, a group of auxiliary gears are symmetrically arranged in the inner ring of the driven ring, a trigger unit is arranged on one side of two auxiliary gears, a cleaning wheel is arranged in the middle of the two auxiliary gears, and a cleaning rod is fixedly connected to the cleaning wheel.

[0011] Optionally, the power unit includes a power rod, one end of which is fixedly connected to a fan blade, and the other end of the power rod is provided with conical teeth. The power rod is meshed and connected to a rotating rod through the conical teeth, and the bottom of the rotating rod is meshed and connected to a driven ring through a gear, and the power rod is rotatably connected to the fuselage.

[0012] Optionally, a group of evenly spaced sawtooth structures are provided on half of the inner wall of the driven ring, and the driven ring is meshedly connected with the auxiliary gear via the sawtooth structure.

[0013] Optionally, the trigger part includes an oil storage rod, both ends of the oil storage rod are provided with oil storage chambers, the oil storage chambers at both ends of the oil storage rod are provided with extrusion plates, a trigger ball is provided in the oil storage rod, both ends of the oil storage rod are connected to the third hydraulic rod through a hose, the movable end of the third hydraulic rod is fixedly connected to a T-block, and a matching gear is rotatably connected to the T-block.

[0014] Optionally, a group of symmetrical T-slots are opened at the bottom of the body, T-blocks are slidably connected in the T-slots, the T-slots are located between the cleaning wheel and the auxiliary gear, and the matching gear is adjacent to the cleaning wheel and the auxiliary gear.

[0015] Optionally, a group of sawtooth structures in an annular array are arranged on the circumference of the cleaning wheel, the inner ring of the cleaning wheel is rotatably connected to the protective glass cover of the detection lens, and the inner side of the cleaning rod is in close contact with the outer wall of the protective glass cover of the detection lens.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The fire safety detection device of the present invention is provided with a telescopic component. When the UAV needs to pass through a relatively narrow space, the support rod on the UAV will synchronously enter the fuselage, so that all the rotors can be synchronously close to the fuselage, reducing the width of the UAV, so that the UAV can smoothly pass through narrow places; further, when the rotors are retracted, the angles of the rotors will automatically tilt, so that the stability of the UAV can be maintained during the retraction process, avoiding the shaking of the fuselage due to the interference of the air when the rotors are retracted, and realizing the ability of the UAV to pass through relatively narrow areas when performing detection, thereby enhancing the flight applicability of the UAV.

[0017] 2. The fire safety detection device of the present invention is provided with a cleaning component. When the lens of the drone is contaminated by dust during the detection process, resulting in blurred images sent back, the operator only needs to control the drone to fly at an angle to automatically clean the protective glass cover outside the detection lens and scrape off the dust on the surface of the protective glass cover on the detection lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the fire safety detection device based on a multi-rotor drone of the present invention; Figure 2 This is a schematic diagram of the internal structure of the fire safety detection device of the present invention; Figure 3 This is a schematic diagram of the rotor structure of the fire safety detection device of the present invention; Figure 4 This is a schematic diagram of the structure of the telescopic assembly of the fire safety detection device of the present invention; Figure 5 It is a structural schematic diagram of the bottom of the fuselage of the fire safety detection device of the present invention; Figure 6 This is a schematic diagram of the structure of the power unit of the fire safety detection device of the present invention; Figure 7 A schematic diagram of a cleaning component of a fire safety detection device according to the present invention; Figure 8 This is a schematic diagram of the structure of the triggering part of the fire safety detection device of the present invention; Fig. 9 It is a schematic diagram of the principle of the inclined part of the fire safety detection device of the present invention.

[0019] Description of reference numerals: 1. Fuselage; 11. Controller; 12. Mounting frame; 13. Servo motor; 14. Limit rod; 15. T-slot; 2. Support rod; 21. Upper limit plate; 22. Lower limit plate; 23. Vortex plate; 24. Synchronous plate; 3. Rotor; 31. Slide plate; 32. Slider; 4. Stop frame; 5. Detection lens; 6. Telescopic assembly; 61. Tilt part; 611. First hydraulic rod; 612. Second hydraulic rod; 62. Sliding part; 621, block; 622, limit spring; 623, fixed block; 7, cleaning assembly; 71, power part; 711, power rod; 712, rotating rod; 72, driven ring; 73, auxiliary gear; 74, trigger part; 741, oil storage rod; 742, extrusion plate; 743, trigger ball; 744, third hydraulic rod; 745, T-block; 746, matching gear; 75, cleaning wheel; 76, cleaning rod. DETAILED DESCRIPTION

[0020] The following is a detailed description of a fire safety detection device based on a multi-rotor drone provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0021] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0022] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0023] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0024] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0025] An embodiment of the present invention provides a fire safety detection device based on a multi-rotor drone, such as Figure 1 As shown, it includes a fuselage 1, a support rod 2, a rotor 3, a parking frame 4, a detection lens 5, a telescopic component 6, and a cleaning component 7.

[0026] like Figure 2 and Figure 3As shown, a controller 11 is provided inside the fuselage 1, a mounting frame 12 is provided inside the fuselage 1, the controller 11 is located in the middle of the mounting frame 12, a servo motor 13 is fixedly connected to the mounting frame 12, a group of limit rods 14 in an annular array are fixedly connected to the outside of the fuselage 1, a support rod 2 is provided in the slide groove of the limit rod 14, a rotor 3 is provided at one end of the support rod 2, an upper limit plate 21 is fixedly connected to the other end of the support rod 2, the upper limit plate 21 is fixedly connected to the lower limit plate 22, the bottom of the lower limit plate 22 is slidably connected to the vortex plate 23, the vortex plate 23 is fixedly connected to the synchronous plate 24, the synchronous plate 24 is rotatably connected to the mounting frame 12, and the circumferential side of the synchronous plate 24 A group of evenly spaced serrated structures are provided, and the synchronization plate 24 is meshed and connected with the servo motor 13 through the serrated structure. A parking frame 4 is fixedly connected to the bottom of the fuselage 1, and a detection lens 5 is provided in the middle of the bottom of the fuselage 1. A protective glass cover is provided on the surrounding side of the detection lens 5. When the operator is conducting a fire safety detection, the operator first needs to control the rotation of the rotor 3 of the multi-rotor drone through the remote control so that the multi-rotor drone can fly to the detection location. When the multi-rotor drone arrives at the designated location, the detection location can be detected through the detection lens 5 and the on-site situation of the detection location can be transmitted. When the detection is completed, the operator can control the multi-rotor drone to return.

[0027] In this embodiment, the detection lens 5 has functions such as infrared thermal imaging and high-definition video recording, which can perform all-round monitoring and detection of the fire scene. Through infrared thermal imaging technology, the multi-rotor drone can sense the location and temperature distribution of the fire source, providing operators with accurate fire situation judgment basis. At the same time, the multi-rotor drone can also transmit high-definition images of the scene back to the command center in real time, so that the command personnel can understand the situation at the fire scene in a timely manner.

[0028] As an implementation method in this embodiment, the support rod 2 is provided with a telescopic component 6. Figure 4 As shown, the telescopic assembly 6 is used to change the width of the drone. The telescopic assembly 6 includes an inclined portion 61, and a sliding portion 62 is provided on one side of the inclined portion 61. The inclined portion 61 includes a first hydraulic rod 611, and the first hydraulic rod 611 is connected to the second hydraulic rod 612 through a hose. The sliding portion 62 includes a clamping block 621, and one side of the clamping block 621 is connected to the fixed block 623 through a limit spring 622. The rotor 3 is rotatably connected to one end of the support rod 2, and a slide plate 31 is provided at the bottom of the rotor 3. A slider 32 is slidably connected in the slide plate 31, and one side of the slider 32 is rotatably connected to the movable end of the first hydraulic rod 611. The fixed block 623 is fixedly connected to the inside of the limit rod 14, and the clamping block 621 is clamped at the opening of the slide groove of the limit rod 14. One side of the clamping block 621 is connected to the movable end of the second hydraulic rod 612, and the second hydraulic rod 612 is fixedly connected to the support rod 2.

[0029] When the multi-rotor drone needs to enter a relatively narrow space for detection, the operator can control the servo motor 13 to rotate. When the servo motor 13 rotates, the synchronous plate 24 meshing with the servo motor 13 rotates. When the synchronous plate 24 rotates, the top vortex plate 23 causes the four lower limit plates 22 to move synchronously. When the lower limit plate 22 moves, the support rod 2 is driven to move through the upper limit plate 21.

[0030] When the support rod 2 moves, on the one hand, the movable end of the second hydraulic rod 612 is squeezed on the block 621. When the movable end of the second hydraulic rod 612 is squeezed, the oil in the second hydraulic rod 612 enters the first hydraulic rod 611 through the hose. When the oil enters the first hydraulic rod 611, the first hydraulic rod 611 contracts. When the first hydraulic rod 611 contracts, the slider 32 connected to the movable end of the first hydraulic rod 611 slides in the slide plate 31, and at the same time, the rotor 3 rotates at a certain angle. When the thrust of the second hydraulic rod 612 on the block 621 is greater than the thrust between the block 621 and the limit rod 14, the rotor 3 rotates at a certain angle. When friction force is generated, the block 621 is pushed by the second hydraulic rod 612, slides in the limit rod 14, and squeezes the limit spring 622; on the other hand, when the support rod 2 moves, the support rods 2 around the fuselage 1 synchronously enter the interior of the fuselage 1. At this time, the position of the rotor 3 connected to the support rod 2 is close to the fuselage 1. At this time, the width of the UAV gradually decreases. When the width of the UAV is reduced to a suitable size, the operator can stop the rotation of the servo motor 13. When the UAV passes through a narrow space, the servo motor 13 can be controlled to rotate in the opposite direction, so that the rotor 3 can be restored to its original position and the tilt angle can be corrected.

[0031] In this embodiment, when the block 621 moves in the limit rod 14, one side is pushed by the second hydraulic rod 612 and the other side is squeezed by the limit spring 622. During this process, the block 621 always squeezes the movable end of the second hydraulic rod 612. When the width of the UAV is reduced, the block 621 will first squeeze the movable end of the second hydraulic rod 612, and the four rotors 3 will first rotate. Then the block 621 moves in the limit rod 14. When the block 621 slides, the width of the UAV is reduced, and the angle of the rotor 3 stops changing.

[0032] As an implementation method in this embodiment, the body 1 is provided with a cleaning component 7, such as Figure 5 and Figure 7As shown, the cleaning assembly 7 is used to clean the stains on the protective glass cover around the detection lens 5. The cleaning assembly 7 includes a power unit 71, which is meshed with a driven ring 72. A group of auxiliary gears 73 are symmetrically arranged in the inner ring of the driven ring 72, a trigger unit 74 is arranged on one side of the two auxiliary gears 73, a cleaning wheel 75 is arranged in the middle of the two auxiliary gears 73, and a cleaning rod 76 is fixedly connected to the cleaning wheel 75.

[0033] like Figure 6 As shown, the power unit 71 includes a power rod 711, one end of which is fixedly connected to a fan blade, and the other end of the power rod 711 is provided with conical teeth. The power rod 711 is meshed and connected with the rotating rod 712 through the conical teeth, and the bottom of the rotating rod 712 is meshed and connected with the driven ring 72 through a gear. The power rod 711 is rotatably connected to the fuselage 1, and a group of evenly spaced serrated structures are provided on half of the inner wall of the driven ring 72. The driven ring 72 is meshed and connected with the auxiliary gear 73 through the serrated structure.

[0034] like Figure 8 As shown, the trigger part 74 includes an oil storage rod 741, and oil storage chambers are provided at both ends of the oil storage rod 741. Extrusion plates 742 are provided in the oil storage chambers at both ends of the oil storage rod 741. A trigger ball 743 is provided in the oil storage rod 741. Both ends of the oil storage rod 741 are connected to the third hydraulic rod 744 through a hose. The movable end of the third hydraulic rod 744 is fixedly connected to a T-block 745, and a matching gear 746 is rotatably connected to the T-block 745. A group of symmetrical T-slots 15 are opened at the bottom of the fuselage 1, and a T-block 745 is slidably connected in the T-slot 15. The T-slot 15 is located between the cleaning wheel 75 and the auxiliary gear 73, and the matching gear 746 is adjacent to the cleaning wheel 75 and the auxiliary gear 73.

[0035] A group of sawtooth structures in an annular array are arranged around the cleaning wheel 75 . The inner ring of the cleaning wheel 75 is rotatably connected to the protective glass cover of the detection lens 5 . The inner side of the cleaning rod 76 is in close contact with the outer wall of the protective glass cover of the detection lens 5 .

[0036] When the operator uses a drone to detect the situation at the fire scene, the drone's camera lens is stained due to the heavy smoke and dust at the fire scene. At this time, when the operator finds that the detection lens 5 is blurred, he needs to operate the drone to make the drone fly at an angle. When the drone flies at an angle, the trigger ball 743 located in the oil storage rod 741 rolls and hits the squeezing plate 742 on one side, causing the squeezing plate 742 to squeeze the oil storage chamber on the corresponding side. At this time, the oil in the oil storage chamber enters the third hydraulic rod 744 through the hose, and the third hydraulic rod 744 extends and pushes the T-block 745 to move in the T-slot 15. When the T-block 745 moves, the mating gear 746 is moved between the auxiliary gear 73 and the cleaning wheel 75, so that the mating gear 746 is meshed with the auxiliary gear 73 and the cleaning wheel 75 respectively.

[0037] When the drone is in tilted flight, the power rod 711 located on the top of the drone rotates under the action of the fan blades and drives the rotating rod 712 to rotate. When the rotating rod 712 rotates, it drives the driven ring 72 to rotate. When the driven ring 72 rotates, since only half of the inner ring of the driven ring 72 is provided with a serrated structure, the driven ring 72 drives the auxiliary gear 73 to rotate only when the serrated structure is engaged with the auxiliary gear 73. When the auxiliary gear 73 rotates, the cleaning wheel 75 is driven to rotate through the matching gear 746. When the cleaning wheel 75 rotates, the cleaning rod 76 slides on the protective glass cover of the detection lens 5, and the dust on the protective glass cover is wiped off by the cleaning rod 76, so that the picture taken by the detection lens 5 becomes clear again.

[0038] In this embodiment, a groove is provided in the pipe inside the oil storage rod 741. When the UAV is flying steadily, the trigger ball 743 is located in the groove and stops moving. When the UAV is tilted, the trigger ball 743 hits the extrusion plate 742 on one side. When the trigger ball 743 leaves the extrusion plate 742 on the corresponding side, the extrusion plate 742 reduces the pressure of the oil storage chamber in the oil storage rod 741. At this time, the oil storage chamber pops out the extrusion plate 742 through the spring and simultaneously extracts the oil in the third hydraulic rod 744. At this time, the third hydraulic rod 744 contracts and separates the mating gear 746 from the auxiliary gear 73 and the cleaning wheel 75.

[0039] The working principle provided by the present invention is: When the operator is conducting a fire safety detection, first the operator needs to control the rotation of the rotor 3 of the multi-rotor drone through the remote control so that the multi-rotor drone can fly to the detection location. When the multi-rotor drone arrives at the designated location, it can detect the detection location through the detection lens 5 and transmit the on-site conditions of the detection location. When the detection is completed, the operator can control the multi-rotor drone to return. The detection lens 5 has functions such as infrared thermal imaging and high-definition camera, which can perform all-round monitoring and detection of the fire scene. Through infrared thermal imaging technology, the multi-rotor drone can sense the location and temperature distribution of the fire source, providing the operator with accurate fire situation judgment basis. At the same time, the multi-rotor drone can also transmit high-definition images of the scene back to the command center in real time, so that the command personnel can understand the situation of the fire scene in time.

[0040] When the multi-rotor drone needs to enter a relatively narrow space for detection, the operator can control the servo motor 13 to rotate. When the servo motor 13 rotates, the synchronous plate 24 meshing with the servo motor 13 rotates. When the synchronous plate 24 rotates, the top vortex plate 23 causes the four lower limit plates 22 to move synchronously. When the lower limit plate 22 moves, the support rod 2 is driven to move through the upper limit plate 21.

[0041] When the support rod 2 moves, Fig. 9 As shown, on the one hand, the movable end of the second hydraulic rod 612 is squeezed on the block 621. When the movable end of the second hydraulic rod 612 is squeezed, the oil in the second hydraulic rod 612 enters the first hydraulic rod 611 through the hose. When the oil enters the first hydraulic rod 611, the first hydraulic rod 611 contracts. When the first hydraulic rod 611 contracts, the slider 32 connected to the movable end of the first hydraulic rod 611 is rotated to slide in the slide plate 31, and at the same time, the rotor 3 is rotated at a certain angle. When the thrust of the second hydraulic rod 612 on the block 621 is greater than the friction between the block 621 and the limit rod 14, the block 621 is pushed by the second hydraulic rod 612, slides in the limit rod 14, and squeezes the limit spring 622.

[0042] On the other hand, when the support rod 2 moves, since the support rods 2 around the fuselage 1 synchronously enter the interior of the fuselage 1, the position of the rotor 3 connected to the support rod 2 is close to the fuselage 1, and the width of the UAV gradually decreases. When the width of the UAV is reduced to an appropriate size, the operator can stop the rotation of the servo motor 13. After the UAV passes through a narrow space, the servo motor 13 can be controlled to rotate in the opposite direction so that the rotor 3 can be restored to its original position and the tilt angle can be corrected. When the block 621 moves in the limit rod 14, one side is pushed by the second hydraulic rod 612 and the other side is squeezed by the limit spring 622. During this process, the block 621 always squeezes the active end of the second hydraulic rod 612. In the process of reducing the width of the UAV, the block 621 will first squeeze the active end of the second hydraulic rod 612, and at the same time, the four rotors 3 will first rotate, and then the block 621 moves in the limit rod 14. When the block 621 slides, the width of the UAV decreases, and the angle of the rotor 3 stops changing.

[0043] When the operator uses a drone to detect the situation at the fire scene, the drone's camera lens is stained due to the heavy smoke and dust at the fire scene. At this time, when the operator finds that the detection lens 5 is blurred, he needs to operate the drone to make the drone fly at an angle. When the drone flies at an angle, the trigger ball 743 located in the oil storage rod 741 rolls and hits the squeezing plate 742 on one side, causing the squeezing plate 742 to squeeze the oil storage chamber on the corresponding side. At this time, the oil in the oil storage chamber enters the third hydraulic rod 744 through the hose, and the third hydraulic rod 744 extends and pushes the T-block 745 to move in the T-slot 15. When the T-block 745 moves, the mating gear 746 is moved between the auxiliary gear 73 and the cleaning wheel 75, so that the mating gear 746 is meshed with the auxiliary gear 73 and the cleaning wheel 75 respectively.

[0044] When the UAV is in tilted flight, the power rod 711 located on the top of the UAV rotates under the action of the fan blades and drives the rotating rod 712 to rotate. When the rotating rod 712 rotates, it drives the driven ring 72 to rotate. When the driven ring 72 rotates, since only half of the inner ring of the driven ring 72 is provided with a serrated structure, the driven ring 72 drives the auxiliary gear 73 to rotate only when the serrated structure is engaged with the auxiliary gear 73. When the auxiliary gear 73 rotates, the cleaning wheel 75 is driven to rotate through the matching gear 746. When the cleaning wheel 75 rotates, the cleaning rod 76 slides on the protective glass cover of the detection lens 5, and the dust on the protective glass cover is wiped off by the cleaning rod 76. When the picture taken by the detection lens 5 becomes clear again, the UAV resumes normal flight.

[0045] A groove is provided in the pipe inside the oil storage rod 741. When the UAV is flying steadily, the trigger ball 743 is located in the groove and stops moving. When the UAV tilts, the trigger ball 743 hits the extrusion plate 742 on one side. When the trigger ball 743 leaves the extrusion plate 742 on the corresponding side, the extrusion plate 742 reduces the pressure of the oil storage chamber in the oil storage rod 741. At this time, the oil storage chamber pops out the extrusion plate 742 through the spring, and at the same time extracts the oil in the third hydraulic rod 744. At this time, the third hydraulic rod 744 contracts and separates the matching gear 746 from the auxiliary gear 73 and the cleaning wheel 75. Here, the gravity of the trigger ball 743 can be adaptively adjusted according to actual conditions and manufacturing materials, so that after it tilts, it can provide sufficient pressure through its own gravity and acceleration.

[0046] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fire safety detection device based on a multi-rotor drone, characterized in that: Including the fuselage; A controller and a mounting frame are provided inside the fuselage, the controller is located in the middle of the mounting frame, and a servo motor is fixedly connected to the mounting frame; A group of limiting rods in an annular array are fixedly connected to the outer side of the fuselage, a support rod is arranged in the slide groove inside the limiting rod, one end of the support rod is arranged with a rotor, and the other end is fixedly connected with an upper limit plate; the upper limit plate is fixedly connected to the lower limit plate, the bottom of the lower limit plate is slidably connected to the vortex plate, the vortex plate is fixedly connected to the synchronous plate, and the synchronous plate is rotatably connected to the mounting frame; a group of uniformly spaced serrated structures are opened on the circumferential side of the synchronous plate, and the serrated structures are meshed and connected with the servo motor; A detection lens is arranged in the middle of the bottom of the fuselage, and a protective glass cover is arranged around the detection lens; The support rod is provided with a telescopic assembly, including an inclined portion and a sliding portion, the inclined portion includes a first hydraulic rod and a second hydraulic rod, the first hydraulic rod is connected to the second hydraulic rod through a hose, the sliding portion is provided on one side of the inclined portion, and the telescopic assembly is used to change the width of the drone; The body is provided with a cleaning assembly, including a power unit and a driven ring, the power unit is meshed and connected with the driven ring, a group of auxiliary gears are symmetrically arranged in the inner ring of the driven ring, a trigger unit is arranged on one side of two auxiliary gears, a cleaning wheel is arranged between the two auxiliary gears, a cleaning rod is fixedly connected to the cleaning wheel, and the cleaning assembly is used to clean stains on the protective glass cover around the detection lens.

2. The fire safety detection device based on a multi-rotor drone according to claim 1 is characterized in that: The sliding part comprises: a clamping block, a limiting spring, and a fixing block, and one side of the clamping block is connected to the fixing block through the limiting spring.

3. The fire safety detection device based on a multi-rotor drone according to claim 2 is characterized in that: The rotor is rotatably connected to one end of the support rod, a slide plate is provided at the bottom of the rotor, a slider is slidably connected to the slide plate, and one side of the slider is rotatably connected to the movable end of the first hydraulic rod.

4. The fire safety detection device based on a multi-rotor drone according to claim 3 is characterized in that: The fixing block is fixedly connected to the inside of the limiting rod, a clamping block is clamped at the opening of the internal sliding groove of the limiting rod, one side of the clamping block is connected to the movable end of the second hydraulic rod, and the second hydraulic rod is fixedly connected to the support rod.

5. The fire safety detection device based on a multi-rotor drone according to claim 1 is characterized in that: The power unit includes a power rod and a rotating rod; one end of the power rod is fixedly connected to the fan blade, and the other end is provided with conical teeth. The power rod is meshed and connected to the rotating rod through the conical teeth, and the bottom of the rotating rod is meshed and connected to the driven ring through a gear. The power rod is rotatably connected to the fuselage.

6. The fire safety detection device based on a multi-rotor drone according to claim 5 is characterized in that: A group of sawtooth structures with uniform intervals are arranged on the inner wall of half of the driven ring, and the driven ring is meshed and connected with the auxiliary gear through the sawtooth structures.

7. The fire safety detection device based on a multi-rotor drone according to claim 6 is characterized in that: The trigger part includes an oil storage rod, both ends of the oil storage rod are provided with oil storage chambers, the oil storage chambers are provided with extrusion plates, the oil storage rod is provided with a trigger ball, both ends of the oil storage rod are connected to the third hydraulic rod through a hose, the movable end of the third hydraulic rod is fixedly connected to a T-block, and the T-block is rotatably connected to a matching gear.

8. The fire safety detection device based on a multi-rotor drone according to claim 7 is characterized in that: The bottom of the fuselage is fixedly connected with a parking frame, and the bottom of the fuselage is also provided with a group of symmetrical T-slots, in which the T-blocks are slidably connected, and the T-slots are located between the cleaning wheel and the auxiliary gear, and the matching gear is adjacent to the cleaning wheel and the auxiliary gear.

9. The fire safety detection device based on a multi-rotor drone according to claim 8, characterized in that: A group of annular array sawtooth structures are arranged on the circumference of the cleaning wheel. The inner ring of the cleaning wheel is rotatably connected to the protective glass cover of the detection lens. The inner side of the cleaning rod is closely attached to the outer wall of the protective glass cover of the detection lens.

Images