A map photogrammetry device based on drone

Abstract

The present invention belongs to the field of map photogrammetry technology and discloses a drone-based map photogrammetry device, comprising a highly integrated surveying camera, a floating mechanism disposed on the exterior of the surveying camera, and a connecting frame disposed below the floating mechanism for mounting on the underside of the drone. The floating mechanism comprises a mounting tube disposed vertically on the exterior of the surveying camera, a set of mounting slots equidistantly disposed circumferentially on the outer surface of the mounting tube, and a floating shell hingedly attached to the upper portion of the inner cavity of the mounting slots. Through the coordinated design of the surveying camera and the floating mechanism, the present invention enables operators to salvage and recover the surveying camera, reducing the difficulty of recovery and improving the efficiency of salvaging the surveying camera, thereby reducing time and cost. This avoids the problem of the heavy weight of the surveying camera and drone, which easily sinks into water and requires an operator to dive underwater for recovery, which is difficult, time-consuming, and costly.

Description

Technical Field

[0001] The present invention belongs to the technical field of map photogrammetry, and in particular is a map photogrammetry device based on an unmanned aerial vehicle. Background Art

[0002] Map photogrammetry is the process of capturing high-resolution surface image data through cameras, and using photogrammetry software to calculate the coordinates and elevation information of objects, providing basic data support for topographic maps, digital elevation models, etc.

[0003] When in use, map photogrammetry cameras in the existing technology are mainly divided into integrated types with drones and detachable types. Among them, detachable measurement cameras are mostly mounted under the drone, and the detachable photogrammetry camera integrates a communication module, a power module, a data calculation module and a camera angle control module. After the operator mounts the detachable photogrammetry camera under the drone, the measurement camera is powered by connecting the power module to the drone power supply, the measurement camera shooting parameters are set through the communication module and the data calculation module, and the camera angle is adjusted through the control module.

[0004] However, there are still corresponding disadvantages in actual use: when a drone carrying a detachable photogrammetry camera for aerial map photography suddenly malfunctions and falls into deep water (such as ponds, lakes, rivers, etc.), the traditional measurement camera and the drone are heavy and easy to sink into the water, requiring operators to dive into the water to salvage and recover them, which is difficult, time-consuming and costly. Summary of the Invention

[0005] Technical problems solved

[0006] In order to solve the problems raised in the above background technology, the present invention provides a map photogrammetry device based on a drone, which has the advantages of easy operation and convenient salvage and recovery. Through the coordinated design of structures such as the measuring camera and the floating mechanism, it is convenient for the operator to salvage and recover the measuring camera, reducing the recovery difficulty, improving the salvage efficiency of the measuring camera, and achieving the effect of less time and low cost.

[0007] Technical Solution

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a map photogrammetry device based on a drone, comprising a highly integrated measurement camera, a floating mechanism disposed outside the measurement camera, and a connecting frame disposed below the floating mechanism for mounting on the bottom surface of the drone;

[0009] The floating mechanism includes a mounting tube vertically arranged outside the measurement camera, a set of mounting grooves equidistantly arranged on the outer surface of the mounting tube, a floating shell hinged to the upper part of the inner cavity of the mounting groove, a floating airbag arranged in the floating shell, an annular slide that moves up and down in the upper part of the inner cavity of the mounting tube, an air supply mechanism arranged in the lower part of the inner cavity of the mounting tube for supplying air to the floating airbag, a transmission mechanism arranged in the floating shell for driving the floating airbag to deploy, and a warning mechanism arranged on the floating airbag;

[0010] The bottom of the measuring camera is detachably connected to the inner ring of the annular slide, a first torsion spring for driving the floating shell to flip outward is provided at the upper part of the inner cavity of the mounting groove, the upper part of the connecting frame is threadedly connected to the lower part of the inner cavity of the mounting tube, and the middle part of the floating airbag is fixedly connected to the inner cavity of the floating shell.

[0011] In the above technical solution, preferably, the air supply mechanism includes a high-pressure gas cylinder arranged at the lower part of the inner cavity of the mounting tube, a dissolving trigger detachably connected to the gas outlet at the bottom of the high-pressure gas cylinder, a diverter shell fixedly sleeved on the outside of the dissolving trigger, a group of connecting pipes circumferentially equidistantly connected to the outer surface of the diverter shell, a mounting cavity vertically provided between the mounting groove and the inner cavity of the mounting tube, a sliding tube vertically moving up and down in the inner cavity of the mounting cavity, a vertical rod vertically fixed to the bottom surface of the inner cavity of the mounting cavity, a sealing block fixed to the top end of the vertical rod and movably connected to the inner cavity of the sliding tube, a contraction spring movably sleeved on the outer surface of the vertical rod, and a hose fixed to the top end of the sliding tube for connecting the inner cavity of the sliding tube with the inner cavity of the floating airbag;

[0012] Among them, the inner cavity of the diverter shell is connected to the air outlet of the dissolving trigger, the inner cavity of the connecting tube is connected to the lower part of the inner cavity of the installation cavity, the outer surface of the sliding tube is fitted with the inner cavity of the installation cavity, the upper and lower ends of the contraction spring are fixedly connected to the bottom surface of the sliding tube and the bottom surface of the inner cavity of the installation cavity respectively, and a one-way valve for introducing gas into the hose is provided on the upper part of the inner cavity of the sliding tube.

[0013] In the above technical solution, preferably, a group of positioning blocks are equidistantly arranged circumferentially in the inner cavity of the mounting cylinder, the left end of the positioning block is movably connected to the bottom surface and side wall of the annular slide, the right end of the positioning block penetrates into the inner cavity of the mounting cavity, the right end of the positioning block is movably connected to the outer surface of the sliding tube, and a groove is vertically opened on the outer surface of the sliding tube, and the right end of the positioning block is movably connected to the inner cavity of the groove.

[0014] In the above technical solution, preferably, a card hole connected to the inner cavity of the installation cavity is opened on the upper part of the inner cavity of the installation groove, a plastic card buckle adapted to the card hole is fixedly installed on the bottom surface of the floating shell, and a docking groove is opened on the side of the outer surface of the sliding tube close to the card hole, and the plastic card buckle is movably connected to the bottom surface of the inner cavity of the docking groove.

[0015] In the above technical solution, preferably, the transmission mechanism includes two main struts symmetrically arranged on the bottom surface of the inner cavity of the floating shell, a slave strut arranged above the main struts, a mounting rod arranged above the main struts for driving the floating airbag to deploy, and a limiter arranged on the bottom surface of the main struts for limiting the slave struts;

[0016] wherein, one end of the main support rod close to the upper part of the inner cavity of the mounting groove is hinged to the bottom surface of the inner cavity of the floating shell, and the bottom surface of the inner cavity of the floating shell is provided with a second torsion spring for driving the main support rod to flip outward, and the other end of the main support rod is hinged to the bottom surface of the mounting rod, and the upper surface of the main support rod is provided with a placement groove, and the end of the slave support rod away from the mounting groove is hinged to the bottom surface of the inner cavity of the placement groove, and the bottom surface of the inner cavity of the placement groove is provided with a third torsion spring for driving the slave support rod to flip outward, and a pin rod is vertically fixed on the other end of the upper surface of the slave support rod, and a pin groove compatible with the pin rod is provided on the bottom surface of the mounting rod, and a magnetic strip is fixedly installed on one side of the outer surface of the mounting rod.

[0017] In the above technical solution, preferably, the limiting member includes a limiting rod vertically arranged on the bottom surface of the inner cavity of the placement groove, a limiting groove provided on the bottom surface of the support rod, and a spring sleeve fixedly sleeved on the bottom of the outer surface of the limiting rod;

[0018] In which, the limiting rod is movably connected to the limiting groove, the bottom end of the limiting rod penetrates to the bottom of the main support rod, the bottom end of the limiting rod is movably connected to the bottom surface of the inner cavity of the floating shell, and the upper surface of the spring sleeve is fixedly connected to the bottom surface of the main support rod.

[0019] In the above technical solution, preferably, a protrusion is vertically fixedly installed on the bottom surface of the inner cavity of the placement groove close to the hinged end of the slave support rod, and the outer surface of the protrusion is movably connected to the outer surface of the slave support rod.

[0020] In the above technical solution, preferably, the warning mechanism includes a group of warning lights fixedly mounted in the middle of the upper surface of the floating airbag, an extension rod arranged in the middle of the inner cavity of the floating airbag, a fixed contact piece fixedly sleeved on the extension rod, a movable contact piece slidably sleeved on one end of the extension rod close to the mounting groove, two rotating rods symmetrically hinged in the inner cavity of the floating airbag, one end of the rotating rod being hinged to the outer surface of the movable contact piece, and a button power supply arranged on the end of the extension rod away from the mounting groove;

[0021] In which, the movable contact piece is movably connected to the fixed contact piece, the warning light is electrically connected to the fixed contact piece and the movable contact piece, the fixed contact piece and the movable contact piece are electrically connected to the button power supply, the end of the extension rod away from the mounting slot penetrates to the outside of the inner cavity of the floating shell, and a knob is fixedly installed on one end of the extension rod, the knob is threadedly connected to one side of the outer surface of the floating shell, and the button power supply is located in the inner cavity of the knob.

[0022] In the above technical solution, preferably, a group of clamping blocks are fixedly installed at equal intervals in the circumferential direction on the lower part of the inner cavity of the mounting cylinder, and a two-stage retraction spring column is vertically fixedly installed on the upper surface of the clamping block. The top end of the output shaft of the two-stage retraction spring column is fixedly connected to the bottom surface of the annular slide, and the outer surface of the clamping block is movably connected to the outer surface of the high-pressure gas cylinder.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention utilizes a coordinated design of a measuring camera, a floating mechanism, and other structures. The air supply mechanism operates under the action of water. Once the air supply mechanism is in operation, the tension of a two-stage retraction spring column causes the annular slide to drive the measuring camera into the mounting tube, thereby protecting the measuring camera and reducing damage from collisions with underwater debris. Simultaneously, after the air supply mechanism is in operation, the elastic force of a first torsion spring causes the floating shell to flip outward from the mounting slot and assume a horizontal position. Once the floating shell is in the horizontal position, the transmission mechanism automatically deploys floating airbags. Multiple deployed floating airbags form an annular ring, reducing the impact of underwater debris. Furthermore, the air supply mechanism inflates the deployed floating airbags, generating buoyancy that propels the measuring camera and drone afloat on the water surface. This facilitates salvaging and recovering the measuring camera, reduces the difficulty, improves the efficiency, and reduces the time and cost of salvaging. This solves the problem in the prior art of heavy measuring cameras and drones, which easily sink in water and require operators to dive underwater to salvage and recover them, resulting in difficulty, time, and high costs.

[0025] 2. The present invention adopts the coordinated design of structures such as a floating airbag, a floating shell, and a warning mechanism. When the floating airbag is inflated, the buoyancy generated drives the measurement camera and the drone to float on the water surface. At this time, the measurement camera is located on the water surface driven by the buoyancy of the floating airbag, and the drone is underwater. During the deployment of the floating airbag, the inner cavity of the floating airbag can drive the rotating rod to move. When the rotating rod moves, the movable contact piece moves and contacts the fixed contact piece, activating the warning light. The light color emitted by the warning light during operation facilitates the operator to quickly observe the measurement camera in the water, thereby improving the efficiency and effectiveness of the operator's search. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the initial state of the present invention;

[0028] Figure 3 This is a front cross-sectional structural diagram of the mounting tube of the present invention;

[0029] Figure 4 This is an exploded view of the structure of the measuring camera, mounting tube, annular slide, connecting frame, and high-pressure gas storage tank of the present invention;

[0030] Figure 5 It is a partial front cross-sectional structural diagram of the slide tube, docking groove, clamping hole, positioning block, and groove of the present invention;

[0031] Figure 6 This is a partial front cross-sectional structural diagram of the mounting cavity, sliding tube, vertical tube, sealing block, and contraction spring of the present invention;

[0032] Figure 7 This is a schematic structural diagram of the floating shell, floating airbag, warning light, main support rod, and secondary support rod of the present invention;

[0033] Figure 8 This is a bottom-up structural diagram of the floating shell, floating airbag, plastic buckle, main support rod, and auxiliary support rod of the present invention;

[0034] Figure 9 This is a schematic structural diagram of the main support rod, the secondary support rod, and the mounting rod of the present invention;

[0035] Figure 10 This is a bottom view of the main support rod, the secondary support rod, and the mounting rod of the present invention;

[0036] Figure 11 It is a schematic diagram of a partial top view and cross-section of the warning mechanism of the present invention;

[0037] Figure 12 It is a schematic cross-sectional structural diagram of the extension rod and button film of the present invention.

[0038] In the figure: 1. Measuring camera; 2. Floating mechanism; 21. Mounting tube; 22. Mounting groove; 23. Floating shell; 24. Floating airbag; 25. Annular slide; 3. Connecting frame; 4. Air supply mechanism; 41. High-pressure gas cylinder; 42. Dissolving trigger; 43. Diverter shell; 44. Connecting pipe; 45. Mounting cavity; 46. Sliding pipe; 47. Vertical rod; 48. Sealing block; 49. Retraction spring; 410. Hose; 5. Transmission mechanism; 51. Main support rod; 52. Slave support rod; 53. Mounting rod; 54. Limiting member; 6. Warning mechanism; 61. Warning light; 62. Extension rod; 63. Fixed contact piece; 64. Moving contact piece; 65. Rotating rod; 66. Button power supply; 7. Positioning block; 8. Groove; 9. Card hole; 10. Plastic clip; 11. Docking slot; 12. Two-stage retraction spring column. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figures 1 to 12 As shown, the present invention provides a map photogrammetry device based on a drone, comprising a highly integrated measurement camera 1, a floating mechanism 2 arranged outside the measurement camera 1, and a connecting frame 3 arranged below the floating mechanism 2 for mounting on the bottom surface of the drone;

[0041] The floating mechanism 2 includes a mounting tube 21 vertically mounted outside the measurement camera 1, a set of mounting slots 22 equidistantly spaced around the outer surface of the mounting tube 21, a floating shell 23 hinged to the upper portion of the inner cavity of the mounting slot 22, a floating airbag 24 disposed within the floating shell 23, an annular slide 25 that moves up and down within the upper portion of the inner cavity of the mounting tube 21, an air supply mechanism 4 disposed within the lower portion of the inner cavity of the mounting tube 21 for supplying air to the floating airbag 24, a transmission mechanism 5 disposed within the floating shell 23 for driving the floating airbag 24 to deploy, and a warning mechanism 6 disposed on the floating airbag 24.

[0042] Among them, the bottom of the measuring camera 1 is detachably connected to the inner ring of the annular slide 25, and a first torsion spring for driving the floating shell 23 to flip outward is provided in the upper part of the inner cavity of the mounting groove 22. The upper part of the connecting frame 3 is threadedly connected to the lower part of the inner cavity of the mounting tube 21, and the middle part of the floating airbag 24 is fixedly connected to the inner cavity of the floating shell 23. A group of clamping blocks are fixedly installed at equal intervals in the circumferential direction on the lower part of the inner cavity of the mounting tube 21. A two-stage retraction spring column 12 is vertically fixedly installed on the upper surface of the clamping block. The top end of the output shaft of the two-stage retraction spring column 12 is fixedly connected to the bottom surface of the annular slide 25, and the outer surface of the clamping block is movably connected to the outer surface of the high-pressure gas cylinder 41.

[0043] When in use, in the initial state, the measuring camera 1 faces the ground, and the connecting frame 3 faces the sky. It is connected to the bottom of the drone through the connecting frame 3, and the floating shell 23 is vertically fitted in the installation groove 22. When the drone and the measuring camera 1 fall into deep water, the air supply mechanism 4 is activated under the action of water. After the air supply mechanism 4 is activated, the annular slide 25 can drive the measuring camera 1 to slide into the installation tube 21 under the pulling force of the two-stage retraction spring column 12, which is convenient for protecting the measuring camera 1 and reducing damage caused by collision with debris in the water. At the same time, after the air supply mechanism 4 is activated, the first torsion spring Driven by the elastic force, the floating shell 23 is turned outside the installation groove 22 to a horizontal state. After the floating shell 23 is turned to a horizontal state, the floating airbag 24 can be automatically deployed through the transmission mechanism 5. After the multiple floating airbags 24 are deployed, they can form an annular ring, which can reduce the collision force of debris in the water. The air supply mechanism 4 can inflate the deployed floating airbags 24, so that the floating airbags 24 generate buoyancy after inflation to drive the measuring camera 1 and the drone to float on the water surface, which is convenient for the operator to salvage and recover the measuring camera 1, reduces the recovery difficulty, improves the salvage efficiency of the measuring camera 1, saves time and is low in cost.

[0044] It should be noted that when the floating airbag 24 is inflated, the buoyancy generated drives the measuring camera 1 and the drone to float on the water surface. At this time, the measuring camera 1 is located on the water surface driven by the buoyancy of the floating airbag 24, and the drone is under the water surface. The floating airbag 24 can drive the warning mechanism 6 to operate when it is deployed. The light color emitted by the warning mechanism 6 when it is in operation makes it easier for the operator to quickly observe the measuring camera 1 in the water, thereby improving the efficiency and effectiveness of the operator's search.

[0045] like Figure 4 、 Figure 5 、 Figure 6As shown, the air supply mechanism 4 includes a high-pressure gas cylinder 41 arranged at the lower part of the inner cavity of the mounting tube 21, a dissolving trigger 42 detachably connected to the gas outlet at the bottom of the high-pressure gas cylinder 41, the dissolving trigger 42 is a prior art, and its structure and principle are not repeated here, a diverter shell 43 fixedly sleeved on the outside of the dissolving trigger 42, a group of connecting pipes 44 circumferentially equidistantly connected to the outer surface of the diverter shell 43, a mounting cavity 45 vertically opened between the mounting groove 22 and the inner cavity of the mounting tube 21, a sliding tube 46 vertically moving up and down in the inner cavity of the mounting cavity 45, a vertical rod 47 vertically fixed to the bottom surface of the inner cavity of the mounting cavity 45, a sealing block 48 fixed to the top end of the vertical rod 47 and movably connected to the inner cavity of the sliding tube 46, a contraction spring 49 movably sleeved on the outer surface of the vertical rod 47 and a hose 410 fixed to the top end of the sliding tube 46 for connecting the inner cavity of the sliding tube 46 with the inner cavity of the floating airbag 24;

[0046] Among them, the inner cavity of the diverter shell 43 is connected to the air outlet of the dissolving trigger 42, the inner cavity of the connecting tube 44 is connected to the lower part of the inner cavity of the installation cavity 45, the outer surface of the sliding tube 46 fits with the inner cavity of the installation cavity 45, and the upper and lower ends of the contraction spring 49 are fixedly connected to the bottom surface of the sliding tube 46 and the bottom surface of the inner cavity of the installation cavity 45 respectively. A one-way valve for introducing gas into the hose 410 is provided at the upper part of the inner cavity of the sliding tube 46, and a manual air release valve is connected to the bottom surface of the diverter shell 43.

[0047] During use, after the dissolving trigger 42 is immersed in water, the salt block or rock sugar in its internal positioning groove dissolves when exposed to water, and its internal spring pushes the inner mouth of the valve to move, so that the compressed gas in the high-pressure gas cylinder 41 enters the installation cavity 45 through the diverter shell 43 and the connecting pipe 44. The gas can push the sliding tube 46 to move upward. After the sliding tube 46 moves upward and separates from the sealing block 48, the gas can enter the floating airbag 24 through the inner cavity of the sliding tube 46, the one-way valve and the hose 410 to inflate it.

[0048] like Figure 5 As shown, a group of positioning blocks 7 are equidistantly arranged around the inner cavity of the mounting cylinder 21. The left end of the positioning block 7 is movably connected to the bottom surface and side wall of the annular slide 25. The right end of the positioning block 7 penetrates into the inner cavity of the mounting cavity 45. The right end of the positioning block 7 is movably connected to the outer surface of the sliding tube 46, and a groove 8 is vertically opened on the outer surface of the sliding tube 46. The right end of the positioning block 7 is movably connected to the inner cavity of the groove 8.

[0049] During use, the gas pushes the slide tube 46 to move upward, driving the groove 8 to move upward. Under the pulling force of the two-stage retraction spring column 12, the annular slide 25 can squeeze the positioning block 7, and the positioning block 7 can move into the groove 8, so that the annular slide 25 can drive the measuring camera 1 to slide into the mounting tube 21.

[0050] like Figure 6As shown, a card hole 9 communicating with the inner cavity of the installation cavity 45 is provided on the upper part of the inner cavity of the installation groove 22, and a plastic card buckle 10 adapted to the card hole 9 is fixedly installed on the bottom surface of the floating shell 23. A docking groove 11 is provided on the side of the outer surface of the sliding tube 46 close to the card hole 9, and the plastic card buckle 10 is movably connected to the inner cavity bottom surface of the docking groove 11.

[0051] During use, when the gas pushes the slide tube 46 upward to move the docking groove 11 upward, the bottom surface of the inner cavity of the docking groove 11 can push the plastic buckle 10 to separate from the card hole 9, so that the floating shell 23 is driven by the elastic force of the first torsion spring to flip outward to the installation groove 22 to a horizontal state.

[0052] like Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 As shown, the transmission mechanism 5 includes two main struts 51 symmetrically arranged on the bottom surface of the inner cavity of the floating shell 23, a slave strut 52 arranged above the main struts 51, a mounting rod 53 arranged above the main struts 51 for driving the floating airbag 24 to deploy, and a limiter 54 arranged on the bottom surface of the main struts 51 for limiting the slave struts 52;

[0053] Among them, one end of the main support rod 51 close to the upper part of the inner cavity of the installation groove 22 is hinged to the inner cavity bottom surface of the floating shell 23, and the inner cavity bottom surface of the floating shell 23 is provided with a second torsion spring for driving the main support rod 51 to flip outward. The other end of the main support rod 51 is hinged to the bottom surface of the installation rod 53, and the side wall of the main support rod 51 is movably connected to the inner cavity of the installation groove 22. A placement groove is provided on the upper surface of the main support rod 51, and one end of the slave support rod 52 away from the installation groove 22 is hinged to the inner cavity bottom surface of the placement groove. The inner cavity bottom surface of the placement groove is provided with a third torsion spring for driving the slave support rod 52 to flip outward. A pin rod is vertically fixedly installed on the other end of the upper surface of 52, and a pin groove adapted to the pin rod is opened on the bottom surface of the mounting rod 53, and a magnetic strip is fixedly installed on one side of the outer surface of the mounting rod 53. The limiting member 54 includes a limiting rod vertically arranged on the bottom surface of the inner cavity of the placement slot, a limiting groove opened on the bottom surface of the support rod 52 and a spring sleeve fixedly sleeved on the bottom of the outer surface of the limiting rod; the limiting rod is movably connected to the limiting groove, and the bottom end of the limiting rod penetrates to the bottom of the main support rod 51, and the bottom end of the limiting rod is movably connected to the bottom surface of the inner cavity of the floating shell 23, and the upper surface of the spring sleeve is fixedly connected to the bottom surface of the main support rod 51.

[0054] When in use, after the floating shell 23 is flipped outward from the mounting groove 22 and becomes horizontal, the side wall of the main support rod 51 is separated from the inner cavity of the mounting groove 22. The main support rod 51 drives the mounting rod 53 to rotate outward from the floating shell 23 under the elastic force of the second torsion spring. In the process of the main support rod 51 rotating outward from the floating shell 23, the bottom end of the limiting rod is separated from the bottom surface of the inner cavity of the floating shell 23. Then, the main support rod 51 is driven by the elastic force of the third torsion spring to rotate outward from the placement groove, thereby driving the floating airbag 24 to deploy through the mounting rod 53, and making multiple floating airbags 24 form an annular ring after deployment, which can increase the contact area with the water surface and improve the floating effect. After contacting each other, the two mounting rods 53 can fit tightly together through the magnetic strip, thereby improving stability.

[0055] like Figure 9 As shown, a protrusion is vertically fixedly installed on the bottom surface of the inner cavity of the placement groove close to the hinged end of the slave support rod 52, and the outer surface of the protrusion is movably connected to the outer surface of the slave support rod 52.

[0056] During use, the protrusion can limit the rotation angle of the slave strut 52 , thereby preventing the slave strut 52 from rotating at an excessively large angle and affecting the deployment effect of the floating airbag 24 .

[0057] like Figure 11 、 Figure 12 As shown, the warning mechanism 6 includes a set of warning lights 61 fixedly mounted in the middle of the upper surface of the floating airbag 24, an extension rod 62 arranged in the middle of the inner cavity of the floating airbag 24, a fixed contact piece 63 fixedly mounted on the extension rod 62, a movable contact piece 64 slidably mounted on one end of the extension rod 62 near the mounting groove 22, two rotating rods 65 symmetrically hinged in the inner cavity of the floating airbag 24, one end of the rotating rod 65 being hinged to the outer surface of the movable contact piece 64, and a button power supply 66 arranged at the end of the extension rod 62 away from the mounting groove 22;

[0058] Among them, the movable contact piece 64 is movably connected to the fixed contact piece 63, the warning light 61 is electrically connected to the fixed contact piece 63 and the movable contact piece 64, the fixed contact piece 63 and the movable contact piece 64 are electrically connected to the button power supply 66, and the end of the extension rod 62 away from the mounting slot 22 penetrates to the outside of the inner cavity of the floating shell 23, and a knob is fixedly installed on one end of the extension rod 62, the knob is threadedly connected to one side of the outer surface of the floating shell 23, and the button power supply 66 is located in the inner cavity of the knob.

[0059] During use, when the floating airbag 24 is deployed, the inner cavity of the floating airbag 24 can drive the rotating rod 65 to move. When the rotating rod 65 moves, the movable contact piece 64 can move to contact the fixed contact piece 63 and activate the warning light 61. The light color emitted by the warning light 61 when it is in operation makes it easier for the operator to quickly observe the measuring camera 1 in the water, thereby improving the efficiency and effectiveness of the operator's search.

[0060] The working principle and use process of the present invention:

[0061] When in use, first in the initial state, the measuring camera 1 is facing the ground, and the connecting frame 3 is facing the sky. It is connected to the bottom of the drone through the connecting frame 3, and the floating shell 23 is vertically fitted in the installation groove 22. When the drone and the measuring camera 1 fall into deep water, the dissolving trigger 42 is submerged in the water, and the salt block or rock sugar in its internal positioning groove dissolves when it encounters water. The internal spring pushes the valve inner mouth to move, so that the compressed gas in the high-pressure gas cylinder 41 enters the installation cavity 45 through the diverter shell 43 and the connecting pipe 44. The gas can push the slide tube 46 to move upward. After the slide tube 46 moves upward and drives the groove 8 to move upward, Under the pulling force of the two-stage retraction spring column 12, the annular slide 25 can squeeze the positioning block 7, so that the positioning block 7 can move into the groove 8. Then the annular slide 25 can drive the measuring camera 1 to slide into the mounting tube 21. At the same time, the slide tube 46 moves upward to drive the docking groove 11 to move upward. When the docking groove 11 moves upward, the bottom surface of its inner cavity pushes the plastic buckle 10 to separate from the card hole 9. Then, the floating shell 23 is driven by the elastic force of the first torsion spring to flip outward to the mounting groove 22 and to a horizontal state. At this time, the side wall of the main support rod 51 is separated from the inner cavity of the mounting groove 22, and the main support rod 51 drives the mounting rod 51 to move upward under the elastic force of the second torsion spring. 3 rotates outward from the floating shell 23, and during the rotation of the main support rod 51 outward from the floating shell 23, the bottom end of the limit rod is driven to separate from the bottom surface of the inner cavity of the floating shell 23, and the slave support rod 52 is driven to rotate outward from the placement groove under the elastic force of the third torsion spring, so that the floating airbag 24 can be deployed through the installation rod 53, and multiple floating airbags 24 are deployed to form an annular ring, which can increase the contact area with the water surface and improve the floating effect. The two installation rods 53 that are in contact with each other can be tightly fitted together through the magnetic strips, thereby improving stability. At the same time, after the slide tube 46 moves up and separates from the sealing block 48, the gas passes through the inner cavity of the slide tube 46 and The one-way valve and the hose 410 can enter the floating airbag 24 to inflate it. After the floating airbag 24 is inflated, the buoyancy generated drives the measuring camera 1 and the drone to float on the water surface, making it convenient for the operator to salvage and recover the measuring camera 1. In the process of deploying the floating airbag 24, the inner cavity of the floating airbag 24 can drive the rotating rod 65 to move. When the rotating rod 65 moves, the movable contact piece 64 can move and contact the fixed contact piece 63 to activate the warning light 61. The light color emitted by the warning light 61 when it is in operation makes it convenient for the operator to quickly observe the measuring camera 1 in the water, thereby improving the efficiency and effectiveness of the operator's search.

[0062] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A map photogrammetry device based on a drone, characterized in that: It comprises a measuring camera (1), a floating mechanism (2) arranged outside the measuring camera (1), and a connecting frame (3) arranged below the floating mechanism (2) and used for being mounted on the bottom surface of a drone; The floating mechanism (2) comprises a mounting cylinder (21) vertically arranged outside the measuring camera (1), a group of mounting grooves (22) equidistantly arranged on the outer surface of the mounting cylinder (21), a floating shell (23) hingedly connected to the upper part of the inner cavity of the mounting groove (22), a floating airbag (24) arranged in the floating shell (23), an annular slide (25) moving up and down in the upper part of the inner cavity of the mounting cylinder (21), an air supply mechanism (4) arranged in the lower part of the inner cavity of the mounting cylinder (21) for supplying air to the floating airbag (24), a transmission mechanism (5) arranged in the floating shell (23) for driving the floating airbag (24) to expand, and a warning mechanism (6) arranged on the floating airbag (24); The bottom of the measuring camera (1) is detachably connected to the inner ring of the annular slide (25); the upper portion of the inner cavity of the mounting groove (22) is provided with a first torsion spring for driving the floating shell (23) to flip outward; the upper portion of the connecting frame (3) is threadedly connected to the lower portion of the inner cavity of the mounting tube (21); and the middle portion of the floating airbag (24) is fixedly connected to the inner cavity of the floating shell (23); The gas supply mechanism (4) comprises a high-pressure gas cylinder (41) arranged at the lower part of the inner cavity of the installation cylinder (21), a dissolving trigger (42) detachably connected to the gas outlet at the bottom of the high-pressure gas cylinder (41), a diverter shell (43) fixedly sleeved on the outside of the dissolving trigger (42), a group of connecting pipes (44) equidistantly connected to the outer surface of the diverter shell (43), and an installation cavity (45) vertically opened between the installation groove (22) and the inner cavity of the installation cylinder (21). A slide tube (46) vertically moving up and down in the inner cavity of the installation cavity (45), a vertical rod (47) vertically fixed to the bottom surface of the inner cavity of the installation cavity (45), a sealing block (48) fixed to the top end of the vertical rod (47) and movably connected to the inner cavity of the slide tube (46), a contraction spring (49) movably sleeved on the outer surface of the vertical rod (47), and a hose (410) fixed to the top end of the slide tube (46) for connecting the inner cavity of the slide tube (46) with the inner cavity of the floating airbag (24); The inner cavity of the diverter shell (43) is connected to the air outlet of the dissolving trigger (42), the inner cavity of the connecting tube (44) is connected to the lower part of the inner cavity of the installation cavity (45), the outer surface of the sliding tube (46) is in contact with the inner cavity of the installation cavity (45), the upper and lower ends of the contraction spring (49) are respectively fixedly connected to the bottom surface of the sliding tube (46) and the bottom surface of the inner cavity of the installation cavity (45), and the upper part of the inner cavity of the sliding tube (46) is provided with a one-way valve for introducing gas into the hose (410).

2. The UAV-based map photogrammetry device according to claim 1, characterized in that: A group of positioning blocks (7) are equidistantly arranged around the inner cavity of the mounting cylinder (21), the left end of the positioning block (7) is movably connected to the bottom surface and side wall of the annular slide (25), the right end of the positioning block (7) penetrates into the inner cavity of the mounting cavity (45), the right end of the positioning block (7) is movably connected to the outer surface of the sliding tube (46), and a groove (8) is vertically opened on the outer surface of the sliding tube (46), and the right end of the positioning block (7) is movably connected to the inner cavity of the groove (8).

3. The UAV-based map photogrammetry device according to claim 2, characterized in that: A clamping hole (9) communicating with the inner cavity of the mounting cavity (45) is provided on the upper portion of the inner cavity of the mounting groove (22); a plastic clamping buckle (10) adapted to the clamping hole (9) is fixedly installed on the bottom surface of the floating shell (23); a docking groove (11) is provided on the outer surface of the sliding tube (46) near the clamping hole (9); and the plastic clamping buckle (10) is movably connected to the inner cavity bottom surface of the docking groove (11).

4. The UAV-based map photogrammetry device according to claim 3, characterized in that: The transmission mechanism (5) comprises two main support rods (51) symmetrically arranged on the bottom surface of the inner cavity of the floating shell (23), a slave support rod (52) arranged above the main support rods (51), a mounting rod (53) arranged above the main support rods (51) for driving the floating airbag (24) to deploy, and a limiting member (54) arranged on the bottom surface of the main support rod (51) for limiting the slave support rod (52); The bottom surface of the inner cavity of the floating shell (23) is provided with a second torsion spring for driving the main support rod (51) to flip outward, and the other end of the main support rod (51) is hinged to the bottom surface of the mounting rod (53). The upper surface of the main support rod (51) is provided with a placement groove, and the end of the slave support rod (52) away from the mounting groove (22) is hinged to the bottom surface of the inner cavity of the placement groove, and the bottom surface of the inner cavity of the placement groove is provided with a third torsion spring for driving the slave support rod (52) to flip outward, and the other end of the upper surface of the slave support rod (52) is vertically fixed with a pin rod, and the bottom surface of the mounting rod (53) is provided with a pin groove adapted to the pin rod, and a magnetic strip is fixedly installed on one side of the outer surface of the mounting rod (53).

5. The UAV-based map photogrammetry device according to claim 4, characterized in that: The limiting member (54) includes a limiting rod vertically arranged on the bottom surface of the inner cavity of the placement groove, a limiting groove provided on the bottom surface of the support rod (52), and a spring sleeve fixedly sleeved on the bottom of the outer surface of the limiting rod; The limiting rod is movably connected to the limiting groove, the bottom end of the limiting rod penetrates to the bottom of the main support rod (51), the bottom end of the limiting rod is movably connected to the bottom surface of the inner cavity of the floating shell (23), and the upper surface of the spring sleeve is fixedly connected to the bottom surface of the main support rod (51).

6. The UAV-based map photogrammetry device according to claim 5, characterized in that: A protrusion is vertically fixedly installed on the bottom surface of the inner cavity of the placement groove near the hinged end of the slave support rod (52), and the outer surface of the protrusion is movably connected to the outer surface of the slave support rod (52).

7. The UAV-based map photogrammetry device according to claim 1, characterized in that: The warning mechanism (6) comprises a group of warning lights (61) fixedly mounted on the middle of the upper surface of the floating airbag (24), an extension rod (62) arranged in the middle of the inner cavity of the floating airbag (24), a fixed contact piece (63) fixedly mounted on the extension rod (62), a movable contact piece (64) slidably mounted on one end of the extension rod (62) close to the installation slot (22), two rotating rods (65) symmetrically hinged in the inner cavity of the floating airbag (24), one end of the rotating rod (65) being hinged to the outer surface of the movable contact piece (64), and a button power supply (66) arranged at the end of the extension rod (62) away from the installation slot (22); The movable contact piece (64) is movably connected to the fixed contact piece (63), the warning light (61) is electrically connected to the fixed contact piece (63) and the movable contact piece (64), the fixed contact piece (63) and the movable contact piece (64) are electrically connected to the button power supply (66), the end of the extension rod (62) away from the installation slot (22) penetrates to the outside of the inner cavity of the floating shell (23), and a knob is fixedly installed on one end of the extension rod (62), the knob is threadedly connected to one side of the outer surface of the floating shell (23), and the button power supply (66) is located in the inner cavity of the knob.

8. The UAV-based map photogrammetry device according to claim 7, characterized in that: A group of clamping blocks are fixedly installed at equal intervals in the circumferential direction in the lower part of the inner cavity of the mounting cylinder (21), and a two-stage retraction spring column (12) is vertically fixedly installed on the upper surface of the clamping block. The top end of the output shaft of the two-stage retraction spring column (12) is fixedly connected to the bottom surface of the annular slide (25), and the outer surface of the clamping block is movably connected to the outer surface of the high-pressure gas storage cylinder (41).

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