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

Abstract

The present application relates to the technical field of geophysical exploration equipment, and specifically discloses a double-umbrella type multi-angle adjusting transient electromagnetic transmitting coil array detection device, which comprises a main support system, a framework support system, a coil system, a multi-angle adjusting mechanism and a quick storage system.The present application has the beneficial effects of realizing accurate adjustment within a continuous angle range, improving the adaptability of the device to different exploration environments, adopting a double-coil system design to realize two typical working modes, combining a double-umbrella type folding structure with lightweight materials in the structural design to reduce the weight of the device, and realizing multiple detection mode conversion with one device, replacing traditional multiple fixed-angle devices, reducing equipment investment costs, and improving equipment operation efficiency.

Description

TECHNICAL FIELD

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

[0002] Transient electromagnetic detection technology is a pulse response electromagnetic method suitable for time domain electromagnetic exploration and an important method in the field of geophysical exploration. As a transmitting device, the detection coil is increasingly widely used in the fields of mineral resource exploration, groundwater investigation and environmental geological investigation.

[0003] However, the conventional detection coil detection device generally adopts a fixed single-coil single-angle design, which cannot be flexibly adjusted according to different exploration objects and terrain characteristics. This design limits the effectiveness and adaptability of exploration, especially in complex terrain or scenarios requiring simultaneous horizontal and vertical detection, often requiring the carrying of multiple sets of equipment or cumbersome disassembly and assembly operations, greatly reducing work efficiency. In addition, the coil frame device in the prior art is generally large in size, inconvenient to carry and transport, increasing the labor and material costs in field exploration work. At the same time, the detection signal strength of the single-coil system is limited, making it difficult to simultaneously consider detection depth and resolution, and the single-angle detection method also limits the diversity and comprehensiveness of data acquisition, reducing the accuracy of detection results.

[0004] In view of the above technical problems, a double-top-umbrella type multi-angle stepless adjustment transient electromagnetic coil array detection device is proposed to explore a more flexible and portable coil detection device design. SUMMARY

[0005] The purpose of the present application is to provide a double-top-umbrella type multi-angle adjustable transient electromagnetic transmitting coil array detection device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A double-top-umbrella type multi-angle adjustable transient electromagnetic transmitting coil array detection device, characterized in that it comprises a main support system, a framework support system, a coil system, a multi-angle adjustment mechanism and a quick storage system.

[0008] The main support system comprises three sections of twistable fixed main support rods, the top of the main support rod is connected to two groups of framework support systems through two connection points, forming a double-top-umbrella structure; the bottom of the main support rod is provided with an extension control switch, which is linked with a sliding locking ring for controlling the sliding of the sliding locking ring along the main support rod and locking to the positioning clamping groove.

[0009] 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;

[0010] 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;

[0011] 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.

[0012] 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.

[0013] 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

[0014] 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.

[0015] Figure 2 It is the state diagram of the first working mode structure of the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device and the type II coil fixer.

[0016] Figure 3 It is the working mode conversion process diagram of the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0017] Figure 4 It is the second working mode structure diagram of the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device, including the front view (a), the top view (b), the front view (c) and the top view (d) of the type II coil fixer.

[0018] Figure 5 It is the structure diagram of the main support rod in the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0019] Figure 6 It is the structure diagram of the type I coil fixer in the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0020] Figure 7 It is the structure diagram of the arbitrary angle mode of the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0021] Figure 8 It is the comparison diagram of the magnetic field intensity of the first working mode of the single coil and the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0022] Figure 9 It is the comparison diagram of the magnetic field intensity of the second working mode of the single coil and the double-parachute type multi-angle adjustment transient electromagnetic transmitting coil array detection device.

[0023] In the figure, 1 is the folding assembly, 2 is the stretching control switch, 3 is the main support rod, 4 is the quick storage rope, 5 is the positioning slot, 6 is the sliding locking ring, 7 is the radiation framework rod, 8 is the coil frame rod, 9 is the type I coil fixer, 10 is the detection coil, 11 is the type II coil fixer, 12 is the fixed sleeve, 13 is the fastening screw, 14 is the locking panel, 15 is the hinge, 16 is the first rotating joint, and 17 is the second rotating joint. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] A dual-peak umbrella type multi-angle adjusting transient electromagnetic transmitting coil array detection device, in an embodiment of the present application, comprises a main support system, a framework support system, a coil system, a multi-angle adjusting mechanism and a quick storage system; the main support system comprises three sections of twist-fixed main support rods 3, the top of the main support rods 3 is connected with two groups of framework support systems through two connection points respectively, forming a dual-peak umbrella type structure; the bottom of the main support rods 3 is provided with an extension control switch 2, the extension control switch 2 is linked with a sliding locking ring 6, and is used for controlling the sliding locking ring 6 to slide along the main support rods 3 and to be locked to a positioning clamping groove 5; the framework support system comprises radiation framework rods 7 and coil frame rods 8, the radiation framework rods 7 are 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 rods 8, forming a framework supporting the coil system; when the sliding locking ring 6 slides along the main support rods 3, the radiation framework rods 7 are driven to expand or contract; the coil system comprises first coil systems and second coil systems, and is installed on the coil frame rods 8 of the two groups of framework support systems through I type coil fixers 9 and II type coil fixers 11 respectively; the I type coil fixer 9 and the II type coil fixer 11 comprise fastening screws 13, locking panels 14 and hinges 15, one end is fixedly sleeved on the end of the coil frame rod 8, the other end is clamped on the fixed sleeve 12, the locking panel 14 is hinged through the hinge 15, and the fastening screw 13 is locked and fixed with the locking panel 14 to fix the detection coil 10; the multi-angle adjusting mechanism comprises II type coil fixers 11, which are respectively sleeved on the ends of three coil frame rods 8 on the common side of the two groups of coil systems, and is used for connecting the two groups of framework support systems and adjusting the relative angle of the two groups of framework support systems; the locking device of the II type coil fixer 11 can lock the two groups of framework support systems at any position in a continuous angle range, and the two limit locking positions correspond to the orthogonal double square coil array structure and the parallel coil array structure respectively; the quick storage system comprises a folding assembly 1 and a quick storage rope 4, the two ends of the quick storage rope 4 are connected with the sliding locking rings 6 on the two main support rods 3 respectively, and the quick storage rope 4 is pulled back to drive the sliding locking ring 6 to be separated from the positioning clamping groove 5, so that the framework support system and the main support system are quickly folded; the folding assembly 1 is installed on the top of the main support rod 3, and is used for providing a pulling force in the folded state.

[0026] In an embodiment of the present application: the present application has two working modes:

[0027] Mode one: orthogonal double square coil array structure

[0028] The two groups of coils adopt a common edge quadrature double square coil array structure, and the two groups of coils are respectively inclined at an angle of 45° and -45° with respect to the ground, and the inclined surface formed by the coils is parallel to the ground. In this mode, a multi-directional electromagnetic field is generated by phase-synchronous positive and negative alternating currents, and the horizontal and vertical geological bodies are simultaneously detected, which is particularly suitable for multi-directional detection in complex terrain environment. When the pulse current passes through the two groups of vertically arranged coils, the electromagnetic fields generated by the two groups of coils are perpendicular to each other in space, and the superimposed magnetic field can effectively excite the multi-dimensional electromagnetic response of the underground medium.

[0029] 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 , and the array structure is placed at the center origin of the spatial coordinate axis. The components of the total magnetic field of the single-turn double coil array in the X, Y and Z directions of the spatial coordinate axis are respectively: and

[0030]

[0031] Among them, is the vacuum permeability, I is the current of the square coil, x is the distance from any point on the X axis to the center origin of the spatial coordinate axis, and z is the distance from any point on the Z axis to the center origin of the spatial coordinate axis. In order to facilitate calculation, the side length of the array square transmitting coil is defined as 2a, that is, a is half of the side length of the transmitting coil. As shown in Figure 8 , under the same power supply condition, the magnetic field strength generated by the quadrature double 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 that of the single coil structure, which forms effective magnetic field distribution in the x and z directions and presents significant multi-directional detection capability.

[0032] The implementation steps of this mode are as follows: first, slide the slide lock ring 6 to a preset first locking position; then, expand the radiation skeleton rod 7 connected with the slide lock ring 6, and at the same time, the radiation skeleton rod 7 supports the coil frame rod 8 to form a coil support frame; finally, connect and lock the two groups of coils in a perpendicular position through the type II coil fixer 11, so that the two groups of coils are respectively inclined at an angle of 45° and -45° with respect to the ground, forming a quadrature structure.

[0033] Mode two: parallel double coil array structure

[0034] ​​​​​The two groups of coils are parallel to the ground to form a parallel array structure, and the two groups of coil systems are kept in parallel. The working principle of this mode is to enhance the detection signal strength through electromagnetic field superposition effect, significantly improve the detection depth and resolution, and is suitable for one-way depth detection in simple terrain environment. The electromagnetic fields generated by the two groups of parallel coils are in the same direction, and the electromagnetic field component perpendicular to the ground is enhanced after superposition, thereby improving the depth detection capability.

[0035] In order to calculate the components of the magnetic field, 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 of the space coordinate axis. The components of the total magnetic field of the single-turn double-coil array in the X, Y and Z directions are 、 and respectively.

[0036] , , ;

[0037] wherein is the vacuum permeability, I is the current of the square coil, and z is the distance from any point on the Z axis to the center of the space coordinate axis. In order to facilitate 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. As shown in Figure 9 , 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 electromagnetic field superposition effect.

[0038] The implementation steps of this mode are as follows: firstly, loosen the fastening screw on the type II coil fixator 11; then adjust the three sections of the twistable main support rod 3 to the desired angle position, and adjust the relative angle of the two groups of coil systems so that the two groups of coils are parallel to the ground; finally, tighten the fastening screw 13 to lock the relative position of the two groups of coil systems.

[0039] In addition to the two typical working modes, the device can also realize continuous angle adjustment between the two modes. The continuous angle adjustment is realized by using the arbitrary angle fixing property of the three sections of the twistable main support rod 3, combining the angle adjustment function of the type II coil fixator 11, locking the two groups of coil systems at any angle, and realizing the continuous angle adjustment between the two typical working modes. During the adjustment process, the first rotation joint 16 and the second rotation joint 17 of the main support rod 3 can be independently rotated, realizing multi-dimensional angle adjustment in space; at the same time, the locking device on the type II coil fixator 11 can control the relative angle between the two groups of coil systems, thereby realizing the adjustment of the relative angle between the two groups of coil systems from the orthogonal structure to the parallel structure, ensuring the adjustment accuracy and locking stability.

[0040] In one embodiment of the present application:

[0041] The method of using the present invention includes five stages: preparation, unfolding, mode selection, operation and storage.

[0042] Preparation stage: The user needs to carry the folded device to the exploration site.

[0043] 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.

[0044] 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.

[0045] Working phase: Connect the power supply and data acquisition equipment to start exploration work.

[0046] 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.

[0047] 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.

[0048] 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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