A transient electromagnetic survey device that can be carried by a drone

Abstract

The present invention belongs to the field of electromagnetic survey equipment and proposes a transient electromagnetic survey device that can be carried by an unmanned aerial vehicle (UAV). The device comprises a UAV body, a transient electromagnetic instrument, a sling assembly, a carrying assembly, and an induction coil. The legs are provided with a support assembly at the bottom, the support assembly comprising a first U-shaped rod and a second U-shaped rod arranged in an alternating pattern, the first U-shaped rod being connected to the sling assembly. The carrying assembly comprises a central mainboard and two stacking frames arranged in a cross pattern. The stacking frames are provided with cylindrical end caps at their distal ends, each of which is provided with an outer coil positioning assembly. The induction coil is formed into a circular coil by the outer coil positioning assembly. The cylindrical end caps are provided with outer perforations on the sides of the stacking frames, and the stacking frames are provided with inner perforations on the sides of the stacking frames. The induction coil is formed into a square coil by the outer and inner perforations. The present invention has a rational design, can accommodate coils of various shapes, is conducive to improving the overall efficiency of surveys, and enhances landing and takeoff safety, making it suitable for large-scale promotion.

Description

Technical Field

[0001] The present invention belongs to the field of electromagnetic exploration equipment, and in particular relates to a transient electromagnetic exploration equipment that can be carried by an unmanned aerial vehicle. Background Art

[0002] Transient electromagnetic surveying (TEM) is a geophysical exploration method based on the principle of electromagnetic induction. It detects geological structures and mineral resources by studying the electromagnetic response characteristics of underground media. A time-domain airborne electromagnetic survey system consists of onboard equipment such as an onboard data acquisition and recording computer, and a transmitting coil and receiving coil mounted externally in the cabin. The transmitter controls the current in the transmitting coil to emit a time-varying electromagnetic field (primary field) into the ground. This primary field induces currents in conductive objects underground, which in turn generate an induced electromagnetic field (secondary field). The secondary induced electromagnetic field decays over time, and the receiving coil can detect the induced voltage components of the secondary field in all directions. The secondary field is related to the electromagnetic properties of the underground material. Analysis of the induced voltage of the received secondary field can be used to infer parameters such as the dielectric constant, conductivity, and magnetic permeability of the underground medium.

[0003] Currently, the coils suspended below helicopters or drones equipped with time-threshold airborne electromagnetic measurement systems need to be circular, square, or polygonal, as exemplified by the three-component airborne transient electromagnetic detection system and method based on hollow coils disclosed in CN115728831A, the airborne transient electromagnetic coil mounting structure disclosed in CN104443415A, and the electromagnetic coils for helicopter time-domain airborne detection applications disclosed in CN109239789A. However, the coils mounted on these mounting structures can generally only have one shape. If the shape of the coils used cannot be adjusted for different electromagnetic survey scenarios, survey errors caused by terrain drift will increase, thereby increasing the scope of mineral source delineation and affecting the overall survey efficiency. Furthermore, the drone's sling is attached to its legs via a sling. Since both the sling and the legs are in direct contact with the ground, they are prone to tilting at the moment of landing and takeoff, affecting landing and takeoff safety. Summary of the Invention

[0004] In response to the technical problems existing in the above-mentioned survey system, the present invention proposes a transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle, which has a reasonable design, can be applied to coils of various shapes, is conducive to improving the overall efficiency of the survey, and improves the landing and take-off safety.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: the present invention provides a transient electromagnetic exploration equipment that can be carried by a drone, including a drone body, a transient electromagnetic instrument is provided at the bottom of the drone body, a suspension rope assembly is provided on the legs of the drone body, a carrying assembly is provided at the end of the suspension rope assembly, an induction coil is provided on the carrying assembly, a support assembly is provided at the bottom of the legs, the support assembly includes a first U-shaped rod and a second U-shaped rod that are staggered up and down, the ends of the first U-shaped rod and the second U-shaped rod are provided with a vertical transition section, the The first U-shaped rod is connected to the lifting rope assembly; the carrying assembly includes a central main board, two stacking racks distributed in a cross are provided on the central main board, and the distal end of the stacking rack is provided with four cylindrical end heads distributed in a central symmetrical manner about the central main board, a connecting hole is provided in the center of the cylindrical end head, an outer circular coil positioning assembly is provided on the cylindrical end head, and the induction coil forms a circular coil through the outer circular coil positioning assembly, an outer through-hole is provided on the side of the cylindrical end head, and an inner through-hole is provided on the side of the stacking rack, and the induction coil forms a square coil through the outer through-hole and the inner through-hole.

[0006] Preferably, an O-shaped shell is provided between the eight outer circular coil positioning assemblies, the shell is provided with a fracture, and the cross section of the shell is C-shaped.

[0007] Preferably, the central main board is provided with a positioning shoulder, the upper surface and the lower surface of the positioning shoulder are respectively nested with the two stacking frames, a plurality of positioning screws are provided on the positioning shoulder, the stacking frame is provided with positioning holes that cooperate with the positioning screws, and the end of the positioning screw is provided with a positioning nut for locking the stacking frame and the central main board.

[0008] Preferably, the stacking frame includes a crisscross plate, the center of which is provided with a positioning groove for cooperating with a positioning shoulder, the center of one of the crisscross plates is also provided with a mounting recess for nesting with the other stacking frame, the cylindrical ends on the two stacking frames are located at the same level, the crisscross plate includes two pairs of V-shaped side rods, the ends of the side rods are provided with end rods, and the end rods, cylindrical ends and side rods are transitionally connected.

[0009] Preferably, a convex rib is provided at the waist of the side rod, and the inner perforation is provided on the convex rib.

[0010] Preferably, the hole wall of the outer perforation is a circular arc surface.

[0011] Preferably, the outer circular coil positioning assembly includes an outer clamping plate and an inner clamping plate, the outer clamping plate clamps the cylindrical end head from the distal end direction, the distal end of the outer clamping plate is provided with a baffle, the baffle and the side of the outer clamping plate are provided with arc transmission holes for passing the induction coil, the inner clamping plate clamps the end rod, the cylindrical end head and the side rod from the proximal end direction and forms a sleeve connection relationship with the outer clamping plate.

[0012] Preferably, the outer splint includes two hollow Ω-shaped segments spaced apart in an upper and lower direction, an outer arc segment is provided between the hollow Ω-shaped segments for cooperating with the side of the cylindrical end head, the end side of the hollow Ω-shaped segment is parallel to the side rod, and an inner arc segment is provided at the end of the hollow Ω-shaped segment, and the inner arc segment is used to sleeve the edge of the inner splint.

[0013] Preferably, the inner clamping plate includes two solid Ω-shaped segments spaced apart in an upper and lower direction, the solid Ω-shaped segments are clamped and fitted with the cylindrical end heads, the side edges of the solid Ω-shaped segments are nested and fitted with the hollow Ω-shaped segments, an arc-shaped limiting clamping segment is provided between the solid Ω-shaped segments, the two ends of the limiting clamping segment are clamped and fitted with the inner wall of the side rod, and the top and bottom surfaces of the limiting clamping segment are nested and fitted with the inner arc segment.

[0014] Preferably, the inner plate is provided with a main connecting hole corresponding to the center of the cylindrical end, and the inner plate is provided with a side connecting hole corresponding to the outer plate near its end, a main bolt is provided in the main connecting hole, and a side bolt is provided in the side connecting hole.

[0015] Preferably, the lifting rope assembly includes a main lifting rope and two pairs of lifting devices arranged on different first U-shaped rods, the main lifting rope is provided with a plurality of connecting balls spaced apart along its length direction, the plurality of connecting balls include at least a first connecting ball, a second connecting ball and a third connecting ball distributed in sequence up and down, the lifting device is provided with an upper lifting rope connected to the first connecting ball, the upper lifting rope is provided with a balance rope, the balance rope is downwardly connected to the third connecting ball, the second connecting ball is provided with a plurality of lower lifting ropes, the ends of the lower lifting ropes are connected to the lifting ears provided on the carrying assembly, and the bottom of the main lifting rope is connected to the inner support plate provided on the central main board.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] The present invention provides a transient electromagnetic survey device that can be carried by an unmanned aerial vehicle (UAV). The mounting assembly is compatible with square induction coils, and by installing an outer circular coil positioning assembly, it can also be used with circular induction coils. This improves the device's applicability and utilization, and helps reduce survey errors. The sling assembly below the UAV body uses a stepped support assembly to prevent direct contact between the sling assembly and the legs, thereby improving the safety of the UAV's takeoff and landing. This device has a rational design, can accommodate coils of various shapes, improves overall survey efficiency, and enhances landing and takeoff safety, making it suitable for large-scale deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 An axonometric diagram of a transient electromagnetic survey device that can be carried by a drone is provided in an embodiment;

[0020] Figure 2 A front view of a transient electromagnetic survey device that can be carried by a drone is provided in an embodiment;

[0021] Figure 3 A three-dimensional diagram of the mounting assembly and the outer circular coil positioning assembly provided in the embodiment;

[0022] Figure 4 A top view of the mounting assembly and the outer circular coil positioning assembly provided in the embodiment;

[0023] Figure 5 An exploded view of a mounting assembly provided in an embodiment;

[0024] Figure 6 A perspective view of a plate stacking rack provided in an embodiment;

[0025] Figure 7 A perspective view of a support assembly provided for an embodiment;

[0026] Figure 8 A three-dimensional diagram of an outer circular coil positioning assembly provided in an embodiment;

[0027] Figure 9 An exploded view of the outer circular coil positioning assembly provided in an embodiment;

[0028] Figure 10 A perspective view of a housing provided in an embodiment;

[0029] In the above figures: 1. UAV body; 2. Transient electromagnetic instrument; 3. Lifting rope assembly; 31. Main lifting rope; 32. Lifting device; 33. Connecting ball; 331. First connecting ball; 332. Second connecting ball; 333. Third connecting ball; 34. Upper lifting rope; 35. Balance rope; 36. Lower lifting rope; 37. Lifting lug; 38. Inner support plate; 4. Carrying assembly; 41. Center main board; 411. Positioning shoulder; 42. Stacking frame; 421. Cylindrical end; 422. Connecting hole; 423. External through hole; 424. Internal through hole; 425. T-shaped plate; 4251. Positioning groove; 4252. Mounting sink; 425 3. Side rod; 4254. End rod; 4255. Raised rib plate; 43. Positioning screw; 44. Positioning nut; 5. Induction coil; 6. Support leg; 7. Support assembly; 71. First U-shaped rod; 72. Second U-shaped rod; 73. Vertical transition section; 8. Outer circular coil positioning assembly; 81. Outer splint; 811. Hollow Ω-shaped section; 812. Outer arc section; 813. Inner arc section; 82. Inner splint; 821. Solid Ω-shaped section; 822. Limit clamping section; 823. Main connecting hole; 824. Side connecting hole; 83. Baffle; 84. Arc transmission hole; 85. Main bolt; 86. Side bolt; 9. Shell. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other unless they conflict. For the convenience of description, the words "upper", "lower", "left", and "right" appearing below only indicate the upper, lower, left, and right directions consistent with the drawings themselves and do not limit the structure.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Examples, such as Figures 1-10As shown, the present invention provides a transient electromagnetic exploration device that can be carried by an unmanned aerial vehicle, comprising an unmanned aerial vehicle body 1, a transient electromagnetic instrument 2 provided at the bottom of the unmanned aerial vehicle body 1, a suspension rope assembly 3 provided on the support legs 6 of the unmanned aerial vehicle body 1, a carrying assembly 4 provided at the end of the suspension rope assembly 3, and an induction coil 5 provided on the carrying assembly 4. The transient electromagnetic instrument 2 has a basic structure based on wireless control, a protective shell provided on the outside of the transient electromagnetic instrument 2, the center of which leads to the suspension rope assembly 3 and a connecting line for establishing an electrical connection with the induction coil 5. In order to improve the stability of the device at the moment of takeoff and landing, the present invention provides a support assembly 7 with a stepped design at the bottom of the support legs 6, such as a first U-shaped rod 71 and a second U-shaped rod 72 staggered in an upper and lower direction, a vertical transition section 73 provided at the ends of the first U-shaped rod 71 and the second U-shaped rod 72, and the first U-shaped rod 71 is connected to the suspension rope assembly 3. Among them, the two ends of the first U-shaped rod 71 are passed through the pipe fittings provided at the bottom of the support leg 6, and the two ends of the first U-shaped rod 71 maintain a certain vertical spacing distance from the second U-shaped rod 72 through the vertical transition section 73; in this way, although the first U-shaped rod 71 is installed with a sling 32, since the contact node between the sling 32 and the first U-shaped rod 71 does not directly contact the ground or the platform of the drone body 1, the second U-shaped rod 72 can be ensured to be relatively stably supported at the take-off level and the landing level at the moment of take-off and landing of the drone body 1, thereby improving the safety of the device at the moment of take-off and landing.

[0033] In order to improve the carrying performance and applicability of the device for the induction coil 5, the carrying component 4 provided by the present invention includes a central main board 41, and two cross-distributed stacking racks 42 are provided on the central main board 41. The distal end of the stacking rack 42 is provided with four cylindrical end heads 421 that are centrally symmetrically distributed about the central main board 41. A connecting hole 422 is provided at the center of the cylindrical end head 421, and an outer circular coil positioning component 8 is provided on the cylindrical end head 421. The induction coil 5 forms a circular coil through the outer circular coil positioning component 8. An outer through-hole 423 is provided on the side of the cylindrical end head 421, and an inner through-hole 424 is provided on the side of the stacking rack 42. The induction coil 5 forms a square coil through the outer through-hole 423 and the inner through-hole 424. The mounting assembly 4 provided by the present invention forms eight mounting nodes by assembling two stacking frames 42 on a central mainboard 41. Four of the spaced-apart mounting nodes have outer holes 423 for threading the induction coil 5, and inner holes 424 provide positioning at the sides of the induction coil 5, making it suitable for square induction coils 5. Furthermore, by installing an outer circular coil positioning assembly 8, eight threading locations are formed on the outer sides of the two stacking frames 42. The ends of the stacking frames 42 support the coils, making it suitable for approximately circular induction coils 5. This improves the applicability and utilization of the device, meets the needs of induction coils 5 of various shapes, and helps reduce survey errors. It should be noted that the mounting assembly 4 and outer circular coil positioning assembly 8 provided by the present device are made of non-metallic materials. This not only prevents the induction coil 5 from transmitting and receiving, but also helps control the suspension mass of the sling assembly 3, thereby reducing the workload of the drone body 1 and improving the stability of the drone body 1 during exploration.

[0034] In order to improve the limiting effect of the circular coil after the device is equipped with the outer circular coil positioning component 8, as shown in FIG. Figure 10 As shown, an O-shaped housing 9 is provided between the eight outer circular coil positioning assemblies 8 provided by the present invention. The housing 9 is provided with a cutout, and the cross-section of the housing 9 is C-shaped. The length of the cutout is less than the minimum spacing between two outer circular coil positioning assemblies 8. The cutout design facilitates sequential insertion of the housing 9 through the outer circular coil positioning assemblies 8, allowing the housing 9 to form a stable circle without the need for additional fixation. The induction coil 5 can then be press-fitted into the housing 9, with the housing 9 providing support for the induction coil 5, thereby ensuring that the induction coil 5 can form a relatively regular circular sensing range.

[0035] like Figure 5As shown, to improve the assembly performance of the mounting assembly 4, the central mainboard 41 provided by the present invention is provided with a positioning shoulder 411. The upper and lower surfaces of the positioning shoulder 411 respectively nest with the two stacking frames 42. A plurality of positioning screws 43 are provided on the positioning shoulder 411. The stacking frames 42 are provided with positioning holes that cooperate with the positioning screws 43. The ends of the positioning screws 43 are provided with positioning nuts 44 for locking the stacking frames 42 and the central mainboard 41. The positioning screws 43 and the positioning nuts 44 are used to lock the relative position of the two stacking frames 42 and the central mainboard 41. The nesting of the stacking frames 42 and the central mainboard 41 effectively shortens the assembly spacing between the two stacking frames 42, providing basic structural guarantees for maintaining the same level of the two stacking frames 42 after assembly.

[0036] Furthermore, if Figure 3-Figure 6 As shown, the stacking frame 42 provided by the present invention includes a crisscross plate 425, and the center of the crisscross plate 425 is provided with a positioning groove 4251 for cooperating with the positioning shoulder 411, and the center of one of the crisscross plates 425 is also provided with a mounting groove 4252 for nesting and cooperating with the other stacking frame 42, and the cylindrical end heads 421 on the two stacking frames 42 are located at the same level, and the crisscross plate 425 includes two pairs of V-shaped side rods 4253, and the ends of the side rods 4253 are provided with end rods 4254, and the end rods 4254, the cylindrical end heads 421 and the side rods 4253 are transitionally connected. Among them, the positioning groove 4251 allows the stacking frame 42 to be sleeved on the positioning shaft shoulder 411, which reduces the shear force at the root of the positioning screw 43 to a certain extent. The most important thing is that it can shorten the assembly distance between the two stacking frames 42. In addition, the design of the installation groove 4252 can make the multiple routing nodes of the two stacking frames 42 at the same level after assembly, thereby ensuring its carrying performance for the induction coil 5 and meeting the shape requirements of the induction coil 5.

[0037] In order to improve the practicality of the mounting component 4 for the square induction coil 5, the waist position of the side rod 4253 provided by the present invention is provided with a convex rib plate 4255, and the convex rib plate 4255 is located on the side path of the induction coil 5, and the inner perforation 424 is provided on the convex rib plate 4255. This not only ensures the routing requirements of the induction coil 5 and keeps it at the same level as the outer perforation 423, so that the induction coil 5 forms a relatively regular square structure after walking out of the inner perforation 424 and the outer perforation 423, but also plays a role in limiting the side of the induction coil 5 to prevent the shape of the induction coil 5 from being significantly offset; at the same time, the convex rib plate 4255 can also ensure the structural strength of the side rod after the hole is opened, thereby improving the bending resistance of the stacking frame 42.

[0038] Taking into account that the induction coil 5 has a certain diameter and is thicker than a general wire, in order to improve the transition performance between it and the mounting component 4 at the four corner positions, the hole wall of the external through-hole 423 provided by the present invention is a circular arc surface, thereby increasing the curvature radius of the induction coil 5 at the corner positions, which is beneficial to ensuring the stability of the square sweeping area formed by the induction coil 5.

[0039] In order to improve the matching performance between the outer circle coil positioning component 8 and the induction coil 5, as shown in FIG. Figure 8 and Figure 9 As shown, the outer circular coil positioning assembly 8 provided by the present invention includes an outer clamping plate 81 and an inner clamping plate 82. The outer clamping plate 81 clamps the cylindrical end head 421 from the distal end direction. The distal end of the outer clamping plate 81 is provided with a baffle 83. The baffle 83 and the side of the outer clamping plate 81 are provided with an arc transmission hole 84 for passing the induction coil 5. The arc transmission hole 84 ensures the smoothness of the routing of the induction coil. The inner clamping plate 82 clamps the end rod 4254, the cylindrical end head 421 and the side rod 4253 from the proximal end direction and forms a jacket connection relationship with the outer clamping plate 81. Among them, the outer clamping plate 81 is plugged into each other from the outside of the stacking frame 42, and the inner clamping plate 82 is plugged into each other from the inside of the stacking frame 42. The plugging range is located at the position of the cylindrical end 421. The outer clamping plate 81 and the inner clamping plate 82 that complete the jacket connection relationship just clamp the cylindrical end 421, and will not separate under the action of indirect external force, thereby establishing an effective threading path for the induction coil 5; and the outer circular coil positioning assembly 8 has a good quick connection function, which is convenient for rapid disassembly and assembly outdoors, which is conducive to improving the actual utilization rate of the device.

[0040] In order to improve the stability of the outer coil positioning assembly 8, the outer clamping plate 81 provided by the present invention includes two hollow Ω-shaped segments 811 spaced apart from each other, an outer arc segment 812 is provided between the hollow Ω-shaped segments 811 for cooperating with the side surface of the cylindrical end 421, the end side surface of the hollow Ω-shaped segment 811 is parallel to the side rod 4253, and an inner arc segment 813 is provided at the end of the hollow Ω-shaped segment 811, and the inner arc segment 813 is used to sleeve the edge of the inner clamping plate 82; further The inner clamping plate 82 includes two solid Ω-shaped sections 821 spaced apart in an upper and lower direction. The solid Ω-shaped sections 821 are clamped and matched with the cylindrical end 421. The side of the solid Ω-shaped section 821 is nested and matched with the hollow Ω-shaped section 811. An arc-shaped limiting clamping section 822 is provided between the solid Ω-shaped sections 821. The two ends of the limiting clamping section 822 are clamped and matched with the inner wall of the side rod 4253. The top and bottom surfaces of the limiting clamping section 822 are nested and matched with the inner arc section 813. Among them, the inner arc section 813 of the outer clamping plate 81 can be embraced on the cylindrical surface of the cylindrical end 421, and the two hollow Ω-shaped sections 811 can be pressed on the surface of the side rod 4253 and press a part of the edge position of the cylindrical end 421; the solid Ω-shaped section 821 can be inserted from the hollow space between the two inner arc sections 813 and stretched to a certain diameter until the plate surface of the two hollow Ω-shaped sections 811 is pressed on the center position of the cylindrical end 421. At the same time, a clamping and positioning relationship is formed between the two ends of the hollow Ω-shaped section 811 and the two side plates, and the pressing effect of the inner arc section 813 on the limiting clamping section 822 can effectively prevent the outer circular coil positioning component 8 from falling off freely, thereby effectively serving to support the circular induction coil 5.

[0041] To improve the reliability of the clamping between the outer and inner plates 81 and 82, the inner plate 82 provided herein is provided with a main connection hole 823 corresponding to the center of the cylindrical end 421. Near its end, the inner plate 82 is provided with a side connection hole 824 corresponding to the outer plate 81. The main connection hole 823 is provided with a main bolt 85, and the side connection hole 824 is provided with a side bolt 86. The use of the main bolt 85 and the side bolt 86 ensures a stable and reliable clamping relationship between the outer plate 81, the inner plate 82, and the cylindrical end 421, providing a reliable routing node for the induction coil 5.

[0042] like Figure 1 and Figure 2As shown, in order to improve the suspension performance of the coil and the carrying component 4 of the present invention in a suspended state, the suspension rope component 3 provided by the present invention includes a main suspension rope 31 and two pairs of suspension devices 32 arranged on different first U-shaped rods 71, and the main suspension rope 31 is provided with a plurality of connecting balls 33 spaced apart along its length direction, and the plurality of connecting balls 33 at least include a first connecting ball 331, a second connecting ball 332 and a third connecting ball 333 distributed in sequence up and down, and the suspension device 32 is provided with an upper suspension rope 34 connected to the first connecting ball 331, and a balance rope 35 is provided on the upper suspension rope 34, and the balance rope 35 is connected downwardly to the third connecting ball 333, and a plurality of lower suspension ropes 36 are provided on the second connecting ball 332, and the ends of the lower suspension ropes 36 are connected to the lifting ears 37 arranged on the carrying component 4, and the bottom of the main suspension rope 31 is connected to the inner support plate 38 arranged on the central main board 41. Among them, the inner support plate 38 is nested and connected with the annular groove on the inner side of the central main board 41; the connecting ball 33 can provide a sufficient connection basis for multiple rope connection nodes at the same level; the upper suspension rope 34, the balance rope 35 and the main suspension rope 31 form a first set of umbrella-like structures, and the lower suspension rope 36 and the main suspension rope 31 form a second set of umbrella-like structures, which is different from the single-line suspension, is conducive to balancing the suspension load, and is conducive to controlling the center of gravity of the equipment within a reasonable preset range, improving the balance of the UAV equipped with a complete set of transient electromagnetic equipment for aerial exploration operations, reducing the probability of terrain deviation, and reducing survey errors.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A transient electromagnetic survey device capable of being carried by an unmanned aerial vehicle (UAV), comprising an UAV body, a transient electromagnetic instrument disposed at the bottom of the UAV body, a suspension rope assembly disposed on the legs of the UAV body, a carrying assembly disposed at the end of the suspension rope assembly, and an induction coil disposed on the carrying assembly, characterized in that: A support assembly is provided at the bottom of the support leg, and the support assembly includes a first U-shaped rod and a second U-shaped rod that are staggered up and down, and the ends of the first U-shaped rod and the second U-shaped rod are provided with vertical transition sections, and the first U-shaped rod is connected to the suspension rope assembly; the carrying assembly includes a central main board, and two stacking racks distributed in a cross are provided on the central main board, and the distal end of the stacking rack is provided with four cylindrical end heads that are centrally symmetrically distributed about the central main board, and a connecting hole is provided at the center of the cylindrical end head, and an outer circular coil positioning assembly is provided on the cylindrical end head, and the induction coil forms a circular coil through the outer circular coil positioning assembly, and an outer through-hole is provided on the side of the cylindrical end head, and an inner through-hole is provided on the side of the stacking rack, and the induction coil forms a square coil through the outer through-hole and the inner through-hole.

2. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 1, characterized in that: An O-shaped shell is provided between the eight outer circular coil positioning components. The shell is provided with a fracture, and the cross section of the shell is C-shaped.

3. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 2, characterized in that: The central main board is provided with a positioning shoulder, the upper surface and lower surface of the positioning shoulder are respectively nested with the two stacking frames, a plurality of positioning screws are provided on the positioning shoulder, the stacking frame is provided with positioning holes that cooperate with the positioning screws, and the end of the positioning screw is provided with a positioning nut for locking the stacking frame and the central main board.

4. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 3, characterized in that: The stacking frame includes a crisscross plate, the center of which is provided with a positioning groove for cooperating with a positioning shoulder, the center of one of the crisscross plates is also provided with a mounting recess for nesting with the other stacking frame, the cylindrical end heads on the two stacking frames are located at the same level, the crisscross plate includes two pairs of V-shaped side rods, the ends of the side rods are provided with end rods, and the end rods, cylindrical end heads and side rods are transitionally connected.

5. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 4, characterized in that: A convex rib plate is provided at the waist of the side rod, the inner perforation is provided on the convex rib plate, and the hole wall of the outer perforation is a circular arc surface.

6. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 1 or 4, characterized in that: The outer circular coil positioning assembly includes an outer clamping plate and an inner clamping plate. The outer clamping plate clamps the cylindrical end from the distal end direction. The distal end of the outer clamping plate is provided with a baffle. The baffle and the side of the outer clamping plate are provided with arc transmission holes for passing the induction coil. The inner clamping plate forms a sleeve connection relationship with the outer clamping plate from the proximal end direction.

7. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 6, characterized in that: The outer splint includes two hollow Ω-shaped segments spaced apart in an upper and lower direction, an outer arc segment for cooperating with the side of the cylindrical end is provided between the hollow Ω-shaped segments, the end side of the hollow Ω-shaped segment is parallel to the side rod, and an inner arc segment is provided at the end of the hollow Ω-shaped segment, and the inner arc segment is used to sleeve the edge of the inner splint.

8. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 7, characterized in that: The inner clamping plate includes two solid Ω-shaped sections spaced apart in an upper and lower direction, the solid Ω-shaped sections are clamped and matched with the cylindrical end heads, the side edges of the solid Ω-shaped sections are nested and matched with the hollow Ω-shaped sections, and an arc-shaped limiting clamping section is provided between the solid Ω-shaped sections, the two ends of the limiting clamping section are clamped and matched with the inner wall of the side rod, and the top and bottom surfaces of the limiting clamping section are nested and matched with the inner arc section.

9. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 8, characterized in that: The inner plate is provided with a main connecting hole corresponding to the center of the cylindrical end, and the inner plate is provided with a side connecting hole corresponding to the outer plate near its end, the main connecting hole is provided with a main bolt, and the side connecting hole is provided with a side bolt.

10. The transient electromagnetic survey equipment that can be carried by an unmanned aerial vehicle according to claim 1, characterized in that: The lifting rope assembly includes a main lifting rope and two pairs of lifting tools arranged on different first U-shaped rods. The main lifting rope is provided with multiple connecting balls, and the multiple connecting balls include at least a first connecting ball, a second connecting ball and a third connecting ball distributed in sequence up and down. The lifting tool is provided with an upper lifting rope connected to the first connecting ball, and a balance rope is provided on the upper lifting rope. The balance rope is connected downward to the third connecting ball. The second connecting ball is provided with multiple lower lifting ropes, and the ends of the lower lifting ropes are connected to the lifting ears provided on the carrying assembly. The bottom of the main lifting rope is connected to the inner support plate provided on the central main board.

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