Double-top umbrella type multi-angle adjustable transient electromagnetic transmitting coil array detection device

Abstract

The invention relates to the technical field of geophysical exploration equipment, and particularly discloses a double-top umbrella type multi-angle adjustable transient electromagnetic transmitting coil array detection device which comprises a main supporting system, a framework supporting system, a coil system, a multi-angle adjusting mechanism and a rapid storage system. The device has the beneficial effects that accurate adjustment in a continuous angle range is realized, and the adaptability of the device to different exploration environments is improved; a double-coil system design is adopted, so that two typical working modes are realized; in structural design, a double-top umbrella type folding structure is combined with a light-weight material, so that the weight of equipment is reduced. According to the device, conversion of multiple detection modes is achieved, traditional multiple fixed angle devices are replaced, the equipment investment cost is reduced, and the equipment operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of geophysical exploration equipment, in particular to a double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device. Background Art

[0002] Transient electromagnetic (TEM) detection technology is a pulse-response electromagnetic method suitable for time-domain electromagnetic exploration and is a key method in geophysical exploration. Detection coils, used as transmitters, are increasingly being used in mineral resource exploration, groundwater surveys, and environmental geological surveys.

[0003] However, traditional detection coil detection devices generally adopt a fixed single-coil single-angle design, which cannot be flexibly adjusted according to different exploration objects and terrain features. This design limits the effectiveness and adaptability of exploration, especially in complex terrain or scenarios where horizontal and vertical detection are required at the same time. It is often necessary to carry multiple sets of equipment or perform cumbersome disassembly and assembly operations, which greatly reduces work efficiency. In addition, the coil frame devices in the prior art are usually large in size, inconvenient to carry and transport, and increase manpower and material costs in field exploration work. At the same time, the detection signal strength of the single-coil system is limited, and it is difficult to take into account both detection depth and resolution at the same time. The single-angle detection method also limits the diversity and comprehensiveness of data acquisition, reducing the accuracy of the detection results.

[0004] In response to the above technical problems, in order to explore the design of a more flexible and portable coil detection device, a double-top umbrella-shaped multi-angle steplessly adjustable transient electromagnetic coil array detection device is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A double-top umbrella-shaped, multi-angle adjustable transient electromagnetic transmitting coil array detection device, characterized by comprising a main support system, a skeleton support system, a coil system, a multi-angle adjustment mechanism, and a rapid storage system; The main support system includes three sections of torsionally fixed main support rods, the tops of which are connected to two sets of skeleton support systems through two connection points, forming a double-top umbrella structure; an extension control switch is provided at the bottom of the main support rod, and the extension control switch is linked to a sliding locking ring for controlling the sliding locking ring to slide along the main support rod and lock into the positioning slot; The skeleton support system includes radiating skeleton rods and coil frame rods. The radiating skeleton rods are arranged radially, one end of which is hinged to the connection point at the top of the sliding locking ring, and the other end is hinged to the coil frame rod, forming a frame supporting the coil system; when the sliding locking ring slides along the main support rod, it drives the radiating skeleton rods to expand or retract; The coil system includes a first coil system and a second coil system, which are respectively installed on the coil frame rods of the two sets of skeleton support systems through I-type coil holders and II-type coil holders; the I-type coil holders and the II-type coil holders include fastening screws, locking panels and hinges, one end of which is fixedly sleeved on the end of the coil frame rod and the other end is clamped on the fixed sleeve, the locking panel is hinged by the hinge, and the fastening screws and the locking panel are locked to fix the detection coil; The multi-angle adjustment mechanism includes a Type II coil holder, which is respectively mounted on the ends of the three coil frame rods on the common side of the two coil systems, and is used to connect the two skeleton support systems and adjust the relative angle between them. The locking device of the Type II coil holder can lock the two skeleton support systems at any position within a continuous angle range, and its two extreme locking positions correspond to the orthogonal double square coil array structure and the parallel coil array structure respectively. The quick storage system includes a folding assembly and a quick storage rope. The two ends of the quick storage rope are respectively connected to the sliding locking rings on the two main support rods. By pulling back the quick storage rope, the sliding locking rings can be driven out of the positioning slots, so that the skeleton support system and the main support system can be quickly folded together; the folding assembly is installed on the top of the main support rod to provide tension in the folded state.

[0007] Compared with the prior art, the present invention has the following advantages: It constructs a coil array system based on a multi-angle adjustment mechanism, realizing two typical operating modes (a double-square coil orthogonal array structure and a parallel array structure) as the extreme adjustment positions, as well as precise adjustment of the continuous angle range between the two modes, thereby improving the device's adaptability to different exploration environments; It adopts a dual-coil system design, synchronously capturing horizontal and vertical geological body information in the first operating mode, and enhancing the detection signal strength through the dual parallel coil configuration in the second operating mode, thereby improving the system's detection depth and spatial resolution. In terms of structural design, the double-top umbrella-shaped folding structure is combined with lightweight materials to reduce the weight of the equipment. The present invention's device can realize the conversion of multiple detection modes, replacing the traditional multiple fixed-angle devices, reducing equipment investment costs and improving equipment operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the folded state of the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0009] Figure 2This is a schematic diagram of the first working mode structure of the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device and the status of the type II coil holder.

[0010] Figure 3 This is a schematic diagram of the working mode conversion process of the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0011] Figure 4 Schematic diagram of the second working mode structure of the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device (a) front view, (b) top view and the status diagram of the type II coil holder (c) front view, (d) top view.

[0012] Figure 5 This is a schematic diagram of the structure of the main support rod in the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0013] Figure 6 This is a schematic diagram of the structure of the Type I coil holder in the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0014] Figure 7 This is a schematic diagram of the structure of the arbitrary angle mode of the double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0015] Figure 8 This is a comparison chart of the magnetic field strength in the first working mode of a single-coil and a double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device.

[0016] Figure 9 This is a comparison chart of the magnetic field strength in the second working mode of the single-coil and double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection devices.

[0017] In the figure: 1-folding assembly, 2-extension control switch, 3-main support rod, 4-quick storage rope, 5-positioning slot, 6-sliding locking ring, 7-radiation skeleton rod, 8-coil frame rod, 9-type I coil holder, 10-detection coil, 11-type II coil holder, 12-fixing sleeve, 13-fastening screw, 14-locking panel, 15-hinge, 16-first rotation joint, 17-second rotation joint. DETAILED DESCRIPTION

[0018] 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.

[0019] A double-top umbrella-shaped, multi-angle adjustable transient electromagnetic transmitting coil array detection device, in one embodiment of the present invention, includes a main support system, a skeleton support system, a coil system, a multi-angle adjustment mechanism, and a quick storage system; the main support system includes three sections of torsionally fixed main support rods 3, the top of the main support rods 3 are connected to two groups of skeleton support systems through two connection points, forming a double-top umbrella-shaped structure; an extension control switch 2 is provided at the bottom of the main support rods 3, and the extension control switch 2 is linked to a sliding locking ring 6 for controlling the sliding locking ring 6 to slide along the main support rods 3 And locked to the positioning card slot 5; the skeleton support system includes a radiation skeleton rod 7 and a coil frame rod 8, the radiation skeleton rod 7 is arranged radially, one end is hinged to the connection point at the top of the sliding locking ring 6, and the other end is hinged to the coil frame rod 8 to form a frame supporting the coil system; when the sliding locking ring 6 slides along the main support rod 3, it drives the radiation skeleton rod 7 to expand or retract; the coil system includes a first coil system and a second coil system, which are respectively installed on the coil frame rod 8 of the two sets of skeleton support systems through the I-type coil holder 9 and the II-type coil holder 11; the I-type coil The coil holder 9 and the type II coil holder 11 include a fastening screw 13, a locking panel 14 and a hinge 15. One end is fixedly sleeved on the end of the coil frame rod 8, and the other end is clamped on the fixed sleeve 12. The locking panel 14 is hinged by the hinge 15, and the fastening screw 13 and the locking panel 14 are locked and fixed to the detection coil 10; the multi-angle adjustment mechanism includes a type II coil holder 11, which is respectively sleeved on the ends of the three coil frame rods 8 on the common side of the two sets of coil systems, and is used to connect the two sets of skeleton support systems and adjust the relative angle between the two sets of skeleton support systems; the locking device of the type II coil holder 11 The two sets of skeleton support systems can be locked at any position within a continuous angle range, and the two extreme locking positions correspond to the orthogonal double square coil array structure and the parallel coil array structure respectively; the quick storage system includes a folding component 1 and a quick storage rope 4, and the two ends of the quick storage rope 4 are respectively connected to the sliding locking rings 6 on the two main support rods 3. By pulling back the quick storage rope 4, the sliding locking ring 6 can be driven to disengage from the positioning slot 5, so that the skeleton support system and the main support system can be quickly folded together; the folding component 1 is installed on the top of the main support rod 3, and is used to provide tension in the folded state.

[0020] In one embodiment of the present invention: the present invention has two working modes: Mode 1: Orthogonal double square coil array structure The two sets of coils adopt a co-lateral orthogonal square coil array structure. The two coils are tilted at 45° and -45° to the ground respectively, and the inclined plane formed by the coils is placed parallel to the ground. In this mode, multi-directional electromagnetic fields are generated through phase-synchronized positive and negative alternating current excitation, and horizontal and vertical geological bodies are detected simultaneously. It is particularly suitable for multi-directional detection in complex terrain environments. When the pulse current passes through the two sets of vertically arranged coils, the electromagnetic fields generated are perpendicular to each other in space. The superimposed magnetic field can effectively stimulate the multi-dimensional electromagnetic response of the underground medium. In order to facilitate the calculation of the magnetic field components, the center distance between the first coil system and the second coil system is approximately , the array structure is placed at the center origin of the spatial coordinate axis, then the components of the total magnetic field of the single-turn double-coil array in the directions of the spatial coordinate axis X, Y, and Z are 、 and They are: , , ; in, is the vacuum magnetic permeability, I is the current of the square coil, x is the distance from any point on the X axis to the center of the spatial coordinate axis, z is the distance from any point on the Z axis to the center of the spatial coordinate axis. For ease of calculation, the side length of the square transmitting coil of the array is defined as 2a, that is, a is half of the side length of the transmitting coil. Figure 8 As shown, under the same power supply conditions, the magnetic field strength generated by the orthogonal square coil array structure is higher than that of the single coil structure, and the magnetic field strength generated in the z direction is times, forming an effective magnetic field distribution in both the x and z directions, showing significant multi-directional detection capabilities; The implementation steps of this mode are: first, slide the sliding locking ring 6 to the preset first locking position; then, unfold the radiating skeleton rod 7 connected to the sliding locking ring 6, and at the same time, support the coil frame rod 8 to form a coil support frame; finally, connect and lock the two sets of coil systems in a perpendicular position to each other through the type II coil holder 11, so that the two sets of coils are at 45° and -45° to the ground respectively, forming an orthogonal structure.

[0021] Mode 2: Parallel dual coil array structure Both coils are parallel to the ground, forming a parallel array structure. The two coil systems remain parallel. This mode works by enhancing detection signal strength through the electromagnetic field superposition effect, significantly improving detection depth and resolution. It is suitable for one-way depth detection in simple terrain environments. The electromagnetic fields generated by the two parallel coils are in the same direction. After superposition, the electromagnetic field component perpendicular to the ground is enhanced, improving depth detection capabilities. In order to facilitate the calculation of the magnetic field components in all directions, the center distance between the first coil system and the second coil system is approximately 2a, and the array structure is placed at the center origin of the spatial coordinate axis. Then the total magnetic field components of the single-turn double-coil array in the X, Y, and Z directions are 、 and They are: , , ; in, is the vacuum magnetic permeability, I is the current of the square coil, z is the distance from any point on the Z axis to the center of the spatial coordinate axis. For ease of calculation, the side length of the square transmitting coil of the array is defined as 2a, that is, a is half of the side length of the transmitting coil. Figure 9 As shown in the figure, the magnetic field strength generated by the parallel double-coil array structure in the central z direction is twice that of the single-coil structure. This mode significantly enhances the detection signal strength through the electromagnetic field superposition effect; The steps for implementing this mode are: first, loosen the fastening screws on the type II coil holder 11; then, adjust the three-section twistable main support rod 3 to the desired angle position, and at the same time adjust the relative angle of the two sets of coil systems so that both sets of coils are parallel to the ground; finally, tighten the fastening screws 13 to lock the relative position of the two sets of coil systems.

[0022] In addition to the two typical working modes, this device can also achieve continuous angle adjustment between the two modes. Continuous angle adjustment utilizes the arbitrary angle fixing characteristics of the three-section twistable main support rod 3, combined with the angle adjustment function of the type II coil holder 11, to lock the two sets of coil systems at any angle, thereby achieving continuous angle adjustment between the two typical working modes. During the adjustment process, the first rotating joint 16 and the second rotating joint 17 of the main support rod 3 can rotate independently to achieve multi-dimensional angle adjustment in space; at the same time, the locking device on the type II coil holder 11 can control the relative angle between the two sets of coil systems, thereby achieving adjustment at any angle from an orthogonal structure to a parallel structure, ensuring adjustment accuracy and locking stability.

[0023] In one embodiment of the present invention: The method of using the present invention includes five stages: preparation, unfolding, mode selection, operation and storage.

[0024] Preparation stage: The user needs to carry the folded device to the exploration site.

[0025] Deployment phase: First, open the folding component 1 and the extension control switch 2, and then select the appropriate working mode or angle according to the exploration needs.

[0026] Mode selection stage: If you need to use mode 1 (orthogonal structure), adjust the sliding locking ring 6 to the preset position and lock it, and the radiating skeleton rod 7 will naturally unfold to form an orthogonal structure; if you need to use mode 2 (parallel structure), you need to adjust the rotation angle of the three-section twistable main support rod 3, and adjust the angle of the two sets of coil systems to be parallel to the ground through the type II coil holder 11; if a specific angle between the two modes is required, you can precisely adjust the three-section twistable main support rod 3, and then use the type II coil holder 11 to lock it at the required angle.

[0027] Working phase: Connect the power supply and data acquisition equipment to start exploration work.

[0028] Storage stage: first adjust the coil device to the shape of mode 1, then release the positioning slot 5 by pulling back the quick storage rope 4, so that the skeleton support system and the main support rod system are quickly folded, close the folding component 1 to complete the folding of the device, and finally carry it away from the exploration site.

[0029] In summary, the present invention achieves precise adjustment within a continuous angle range, improving the adaptability of the device to different exploration environments; it adopts a dual-coil system design to achieve two typical working modes: in the first working mode, horizontal and vertical geological body information is captured synchronously, and in the second working mode, the detection signal strength is enhanced by the dual parallel coil configuration, thereby improving the detection depth and spatial resolution of the system. In terms of structural design, the double-top umbrella-shaped folding structure is combined with lightweight materials to reduce the weight of the equipment. The present invention uses a set of devices to achieve multiple detection mode conversions, replacing the traditional multiple sets of fixed-angle devices, reducing equipment investment costs, and improving equipment operation efficiency.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device, characterized in that: It includes main support system, skeleton support system, coil system, multi-angle adjustment mechanism and quick storage system; The main support system includes three sections of torsionally fixed main support rods, the tops of which are connected to two sets of skeleton support systems through two connection points, forming a double-top umbrella structure; an extension control switch is provided at the bottom of the main support rod, and the extension control switch is linked to a sliding locking ring for controlling the sliding locking ring to slide along the main support rod and lock into the positioning slot; The skeleton support system includes radiating skeleton rods and coil frame rods. The radiating skeleton rods are arranged radially, one end of which is hinged to the connection point at the top of the sliding locking ring, and the other end is hinged to the coil frame rod, forming a frame supporting the coil system; when the sliding locking ring slides along the main support rod, it drives the radiating skeleton rods to expand or retract; The coil system includes a first coil system and a second coil system, which are respectively installed on the coil frame rods of the two sets of skeleton support systems through a Type I coil holder and a Type II coil holder; the coil holder includes a fastening screw, a locking panel and a hinge, one end of which is fixedly sleeved on the end of the coil frame rod and the other end is clamped on the fixed sleeve, the locking panel is hinged by a hinge, and the fastening screw and the locking panel are locked to fix the detection coil; The multi-angle adjustment mechanism includes a Type II coil holder, which is respectively mounted on the ends of the three coil frame rods on the common side of the two coil systems, and is used to connect the two skeleton support systems and adjust the relative angle between them. The locking device of the Type II coil holder can lock the two skeleton support systems at any position within a continuous angle range. The two extreme locking positions of the Type II coil holder correspond to the orthogonal double square coil array structure operating mode and the parallel coil array structure operating mode respectively. The quick storage system includes a folding assembly and a quick storage rope. The two ends of the quick storage rope are respectively connected to the sliding locking rings on the two main support rods. By pulling back the quick storage rope, the sliding locking rings can be driven out of the positioning slots, so that the skeleton support system and the main support system can be quickly folded together; the folding assembly is installed on the top of the main support rod to provide tension in the folded state.

2. The double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device according to claim 1 is characterized in that: The main support rod includes three sections and a first rotating joint and a second rotating joint. Two adjacent sections of the rod are hinged through the first rotating joint and the second rotating joint, and can be fixed at any angle through a torsion locking structure.

3. The double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device according to claim 2 is characterized in that: In the working mode of the orthogonal double square coil array structure, the two groups of coils are arranged vertically with the same edge, inclined at 45° and -45° to the ground respectively, and the inclined plane formed by the coil plane is parallel to the ground, and is excited by phase-synchronized positive and negative alternating currents.

4. The double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device according to claim 3 is characterized in that: In the parallel coil array structure working mode, the planes of the two sets of coils are parallel to the ground, and the vertical magnetic field strength is enhanced by electromagnetic field superposition.

5. The double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device according to claim 4 is characterized in that: The radiation skeleton rods and the coil frame rods are both made of carbon fiber composite materials, and there are eight radiation skeleton rods and eight coil frame rods in total, which are evenly distributed in the circumferential direction.

6. The double-top umbrella-shaped multi-angle adjustable transient electromagnetic transmitting coil array detection device according to claim 5, characterized in that: The detection coil is wound with multi-core copper cables arranged in an orderly manner, and the number of turns is adjusted by replacing the detection coil.

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