Electromagnetic excitation device

Abstract

This invention discloses an electromagnetic excitation device, relating to the field of seismic exploration technology. It includes a housing assembly, an excitation assembly, and a vibrating plate. The housing assembly includes a housing body with a first receiving groove having a first opening facing a first direction. The excitation assembly is disposed within the first receiving groove and includes two permanent magnets and an electromagnet. The two permanent magnets are arranged opposite each other with the same pole along a second direction and connected to the bottom wall of the first receiving groove. The electromagnet is disposed between the two permanent magnets and connected to the housing body. When an alternating current is applied, it vibrates back and forth between the two permanent magnets, generating an excitation force that acts on the housing body. The vibrating plate is disposed on the side of the bottom wall of the first receiving groove facing away from the first opening and is coupled to the ground. When the electromagnet is energized, it is subjected to the excitation force transmitted by the housing body and acts on the ground. Thus, the structure is simple, the overall size is small, the weight is light, and it is easy to carry. Simultaneously, it generates a large amplitude and excitation force, improving exploration accuracy and depth.

Description

Technical Field

[0001] This invention relates to the field of seismic exploration technology, specifically to an electromagnetic excitation device. Background Technology

[0002] Seismic exploration is a core technology in engineering exploration, especially in the development and utilization of urban underground space, where it has been widely applied due to its advantages of large detection depth and range. Traditional seismic sources have a significant environmental impact and are limited in densely populated areas. Controlled seismic sources, with their high resolution and controllable environmental impact, have become an ideal tool for shallow urban seismic exploration. The working principle of a controlled seismic source is to use a specific energy source to stimulate underground rocks and observe their response, thereby inferring geological structure and tectonic features. Controlled seismic sources typically employ equipment such as hydraulic vibrators or air guns, transmitting energy underground and observing the feedback signals to infer important information such as underground structural features, stratum thickness, and groundwater reservoirs. However, existing hydraulic vibrators or air guns are bulky and lack portability. Summary of the Invention

[0003] The main objective of this invention is to provide a small-sized and portable electromagnetic excitation device.

[0004] To achieve the above objectives, the present invention provides an electromagnetic excitation device, the electromagnetic excitation device comprising:

[0005] The housing assembly includes a housing body having a first receiving groove with a first opening in a first direction;

[0006] A vibration excitation assembly, disposed within the first receiving groove, includes two permanent magnets and an electromagnet. The two permanent magnets are arranged opposite each other with the same pole along a second direction and are connected to the bottom wall of the first receiving groove. The electromagnet is disposed between the two permanent magnets and connected to the outer casing body. It is used to generate an excitation force acting on the outer casing body by vibrating back and forth between the two permanent magnets when an alternating current is applied.

[0007] A vibrating plate is disposed on the bottom wall of the first receiving groove on the side facing away from the first opening, for coupling with the ground so that when the electromagnet is energized, it is subjected to the excitation force transmitted by the outer shell body and acts on the ground.

[0008] Wherein, the first direction and the second direction are perpendicular to each other in the plane.

[0009] Optionally, the electromagnetic excitation device further includes at least one leaf spring, and the electromagnet is connected to the outer shell body through the leaf spring.

[0010] Optionally, the excitation assembly further includes two first housings disposed between the two permanent magnets and sequentially distributed along the second direction. The two first housings are detachably connected, and each first housing has a second receiving groove with a second opening facing the other first housing. The two second receiving grooves enclose a receiving space, and the electromagnet is housed in the receiving space.

[0011] The leaf spring is connected to the first outer shell.

[0012] Optionally, four leaf springs are provided, and each leaf spring extends along a third direction, with each end of the leaf spring corresponding to one of the two side walls of the first receiving groove in the third direction.

[0013] The two first outer shells are respectively provided with first connecting parts at both ends in the first direction, and the four first connecting parts are connected to the middle parts of the four leaf springs one by one.

[0014] Wherein, the third direction, the first direction, and the second direction are perpendicular to each other in the plane.

[0015] Optionally, the electromagnetic excitation device further includes eight fixing blocks, with each end of the steel leaf spring connected to one of the fixing blocks;

[0016] Each of the fixing blocks is disposed on one side wall of the first receiving groove in the third direction. Each of the fixing blocks has a slot facing the first receiving groove for one end of the leaf spring to be inserted. The two side walls of the first slot in the second direction are threadedly connected to the leaf spring by a first bolt.

[0017] Optionally, the electromagnet includes an iron core, a coil frame, and a coil. The iron core is inserted into the coil frame, and the coil is wound around the outer periphery of the coil frame. One of the two first housings has a wire groove for one end of the coil to extend out of the accommodating space and be electrically connected to an external power source, so that alternating current can be passed through the electromagnet.

[0018] Optionally, the excitation assembly further includes two second housings spaced apart along the second direction, each second housing having a third receiving groove with an opening facing the other second housing, and each third receiving groove having a permanent magnet installed therein;

[0019] Each of the second outer shells has a second connecting portion protruding from both ends in the third direction, and each of the second connecting portions has at least one U-shaped hole through it, and a second bolt is inserted into each of the U-shaped holes;

[0020] The second outer casing is threadedly connected to the bottom wall of the first receiving groove by the second bolt.

[0021] Optionally, the excitation assembly further includes at least one reinforcing rib, which abuts against the side of the second housing away from the electromagnet;

[0022] The reinforcing rib has two mounting holes, and a third bolt is inserted into each mounting hole. The reinforcing rib is threaded to the second outer shell through the third bolt inserted in one of the two mounting holes, and is threaded to the bottom wall of the first receiving groove through the third bolt inserted in the other of the two mounting holes. The mounting hole corresponding to the bottom wall of the first receiving groove is a U-shaped hole.

[0023] Optionally, the outer shell body has a handle on at least one of its two side walls in the third direction; wherein the third direction, the first direction, and the second direction are perpendicular to each other in the plane.

[0024] Optionally, the vibrating plate has a plurality of triangularly arranged teeth arranged in an array on the side facing away from the main body of the outer shell.

[0025] In the technical solution of this invention, the electromagnetic excitation device uses a structure combining two permanent magnets and an electromagnet to generate excitation force. That is, the electromagnet is placed between the two permanent magnets, and the two permanent magnets are arranged with the same polarity opposite each other on both sides of the electromagnet. Compared with hydraulic exciters and air cannons, this configuration is simple in structure, small in size, light in weight, and easy to carry, making it suitable for use in urban and remote mountainous areas. At the same time, the amplitude and excitation force generated by the excitation component are large, improving exploration accuracy and exploration depth. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A schematic diagram of an embodiment of the electromagnetic excitation device provided by the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the permanent magnet and electromagnet in the electromagnetic excitation device.

[0029] Figure 3 for Figure 1 A partial structural schematic diagram of the electromagnetic excitation device.

[0030] Figure 4 for Figure 2 A partial structural diagram of the excitation component of the electromagnetic excitation device;

[0031] Figure 5 for Figure 4 Partial structural diagram;

[0032] Figure 6 for Figure 4 Partial structural diagram;

[0033] Figure 7 for Figure 2 Schematic diagram of the reinforcing ribs of the electromagnetic excitation device;

[0034] Figure 8 for Figure 2 A schematic diagram of the structure of the fixing block of the electromagnetic excitation device.

[0035] Explanation of icon numbers:

[0036] label name label name 100 Electromagnetic excitation device 24 First connecting part 1 Housing components 241 Snap 11 outer shell body 242 Second slot 111 First receiving slot 25 Second outer shell 12 Top cover 26 Second connecting part 2 Vibration components 3 Vibrating plate 21 permanent magnet 31 teeth 22 electromagnet 4 leaf springs 221 iron core 5 Fixed block 222 Coil frame 51 First card slot 223 coil 6 Reinforcing ribs 23 First outer shell 61 Mounting holes 231 Second receiving slot 7 handle 232 cable tray

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] Seismic exploration is a core technology in engineering exploration, especially in the development and utilization of urban underground space, where it has been widely applied due to its advantages of large detection depth and range. Traditional seismic sources have a significant environmental impact and are limited in densely populated areas. Controlled seismic sources, with their high resolution and controllable environmental impact, have become an ideal tool for shallow urban seismic exploration. The working principle of a controlled seismic source is to use a specific energy source to stimulate underground rocks and observe their response, thereby inferring geological structure and tectonic features. Controlled seismic sources typically employ equipment such as hydraulic vibrators or air guns, transmitting energy underground and observing the feedback signals to infer important information such as underground structural features, stratum thickness, and groundwater reservoirs. However, existing hydraulic vibrators or air guns are bulky and lack portability.

[0042] In view of this, the present invention provides an electromagnetic excitation device 100. Figures 1 to 8 The electromagnetic excitation device 100 provided by the present invention.

[0043] Please see Figures 1 to 8The electromagnetic vibration device 100 includes a housing assembly 1, a vibration assembly 2, and a vibration plate 3. The housing assembly 1 includes a housing body 11, which has a first receiving groove 111 with a first opening facing a first direction. The vibration assembly 2 is disposed in the first receiving groove 111 and includes two permanent magnets 21 and an electromagnet 22. The two permanent magnets 21 are arranged opposite each other with the same pole along a second direction and are connected to the bottom wall of the first receiving groove 111. The electromagnet 22 is disposed between the two permanent magnets 21 and is connected to the housing body 11. When an alternating current is applied, it vibrates back and forth between the two permanent magnets 21 to generate an excitation force acting on the housing body 11. The vibration plate 3 is disposed on the side of the bottom wall of the first receiving groove 111 facing away from the first opening and is used to couple with the ground so that when the electromagnet 22 is energized, it is subjected to the excitation force transmitted by the housing body 11 and acts on the ground. The first direction and the second direction are perpendicular to each other in the plane.

[0044] In the technical solution of the present invention, the electromagnetic excitation device 100 adopts a structure combining two permanent magnets 21 and electromagnets 22 to generate excitation force. That is, the electromagnets 22 are placed between the two permanent magnets 21, and the two permanent magnets 21 are arranged with the same polarity opposite each other on both sides of the electromagnets 22. Compared with hydraulic exciters and air guns, this configuration is simple in structure, small in size, light in weight, and easy to carry, making it suitable for use in urban and remote mountainous areas. At the same time, the amplitude and excitation force generated by the excitation component 2 are large, which improves the exploration accuracy and exploration depth.

[0045] It should be noted that the electromagnet 22 is also electrically connected to a controller, which can control the flow of alternating current, thereby controlling the intensity, frequency, direction and other parameters of the excitation force generated by the electromagnet 22, and improving the practicality of the electromagnetic excitation device 100.

[0046] For further details, please refer to Figure 3 The electromagnetic vibration device 100 further includes at least one leaf spring 4, and the electromagnet 22 is connected to the outer shell 11 through the leaf spring 4. Thus, when an alternating current is applied to the electromagnet 22, the excitation force generated by the electromagnet 22 is transmitted to the outer shell 11 through the leaf spring 4, and then to the ground through the vibrating plate 3. In the electromagnetic vibration device 100, the leaf spring 4 not only provides elastic reaction force, but also supports the movable parts of the electromagnetic vibration device 100 (such as the electromagnet 22), simplifying the structure, facilitating the assembly of the entire device, and further reducing the size of the electromagnetic vibration device 100.

[0047] Further, please refer to Figures 3 to 5The excitation assembly 2 further includes two first housings 23 disposed between the two permanent magnets 21 and sequentially distributed along the second direction. The two first housings 23 are detachably connected, and each first housing 23 has a second receiving groove 231 with a second opening facing the other first housing 23. The two second receiving grooves 231 enclose a receiving space, in which the electromagnet 22 is housed. The steel leaf spring 4 is connected to the first housing 23. Thus, when the electromagnetic excitation device 100 is used for field operations, the first housings 23 can protect the electromagnet 22, preventing it from being affected by external factors such as soil, thus reducing the exploration efficiency of the electromagnetic excitation device 100.

[0048] It should be noted that, in this invention, the detachable connection method of the two first outer shells 23 is not limited; it can be a bolt connection, a snap-fit ​​connection, etc. Specifically, in one embodiment of this invention, the two first outer shells 23 are connected by countersunk bolts.

[0049] Further, please refer to Figure 3 In one embodiment of the present invention, four leaf springs 4 are provided, and each leaf spring 4 extends along a third direction. The two ends of each leaf spring 4 are connected to the two side walls of the first receiving groove 111 in the third direction. The two first outer shells 23 are respectively provided with first connecting portions 24 at both ends in the first direction. The four first connecting portions 24 are connected to the middle portions of the four leaf springs 4 in a corresponding manner. The third direction, the first direction, and the second direction are perpendicular to each other in the plane.

[0050] Furthermore, in this invention, the connection method between the leaf spring 4 and the outer shell body 11 is not limited; it can be a threaded connection or welding, etc. For details, please refer to [link to specific details]. Figure 3 and Figure 8 The electromagnetic vibration device 100 further includes eight fixing blocks 5, with each end of the leaf spring 4 connected to one of the fixing blocks 5. Each fixing block 5 is disposed on one side wall of the first receiving groove 111 in the third direction, and each fixing block 5 has a first slot 51 with its opening facing the first receiving groove 111 for one end of the leaf spring 4 to be inserted. The two side walls of the first slot 51 in the second direction are threadedly connected to the leaf spring 4 by first bolts. This enhances the connection strength between the fixing block 5 and the leaf spring 4.

[0051] It should be noted that, in this invention, the connection method between the fixing block 5 and the side wall of the first receiving groove 111 is not limited; it can be welding, threaded connection, etc. Specifically, in one embodiment of this invention, the fixing block 5 is bolted to the side wall of the first receiving groove 111.

[0052] For details, please refer to Figures 3 to 5 In one embodiment of the present invention, the first connecting portion 24 has a through hole 241 extending at least along the third direction for the leaf spring 4 to be inserted into, and at least one bolt is inserted into the first connecting portion 24 along the first direction to thread the leaf spring 4 into the first connecting portion 24, thereby enhancing the connection strength between the first connecting portion 24 and the leaf spring 4. Furthermore, to facilitate the installation of the leaf spring 4, the first connecting portion 24 has a second slot 242 on the side facing away from the first housing 23 for the leaf spring 4 to be inserted into the through hole along the first direction for fixation.

[0053] For details, please refer to Figure 5 The electromagnet 22 includes an iron core 221, a coil frame 222, and a coil 223. The iron core 221 is inserted into the coil frame 222, and the coil 223 is wound around the outer periphery of the coil frame 222. One of the two first outer shells 23 has a wire groove 232. The wire groove 232 is used to allow one end of the coil 223 to extend out of the accommodating space and be electrically connected to an external power source, so that alternating current can be passed through the electromagnet 22.

[0054] For details, please refer to Figure 3 and Figure 6 The excitation assembly 2 further includes two second housings 25 spaced apart along the second direction. Each second housing 25 has a third receiving groove with an opening facing the other second housing 25. A permanent magnet 21 is installed in each third receiving groove. In this way, by setting the second housings 25, the structure of the permanent magnet 21 can be protected. When the electromagnetic excitation device 100 is used for field operations, the permanent magnet 21 is prevented from being affected by external factors such as soil, thus reducing the exploration efficiency of the electromagnetic excitation device 100.

[0055] It should be noted that the permanent magnet 21 and the second housing 25 are bolted together.

[0056] Further, please refer to Figure 3 and Figure 6Each of the second outer shells 25 has a second connecting portion 26 protruding from both ends in the third direction. Each second connecting portion 26 has at least one U-shaped hole, and a second bolt is inserted into each U-shaped hole. The second outer shell 25 is threadedly connected to the bottom wall of the first receiving groove 111 by the second bolt. In this way, by setting the U-shaped hole, the gap between the second outer shell 25 and the electromagnet 22 is adjustable, that is, the gap between the permanent magnet 21 and the electromagnet 22 is adjustable, thereby adjusting the magnitude of the excitation force to meet different exploration needs.

[0057] Furthermore, given the relatively large excitation force generated by the electromagnet 22, please refer to [link / reference needed]. Figure 3 and Figure 7 In one embodiment of the present invention, the excitation assembly 2 further includes at least one reinforcing rib 6, which abuts against the side of the second housing 25 away from the electromagnet 22. The reinforcing rib 6 has two mounting holes 61, each with a third bolt inserted. The reinforcing rib 6 is threadedly connected to the second housing 25 via the third bolt inserted in one of the two mounting holes 61, and threadedly connected to the bottom wall of the first receiving groove 111 via the third bolt inserted in the other of the two mounting holes 61. The mounting hole 61 corresponding to the bottom wall of the first receiving groove 111 is a U-shaped hole. Thus, by providing the reinforcing rib 6 to support the second housing 25, the second housing 25 is prevented from tilting under stress.

[0058] It should be noted that in this invention, the number of reinforcing ribs 6 is not limited; it can be one, two, three, etc. Specifically, in this invention, each of the second outer shells 25 is connected to two reinforcing ribs 6, and the two reinforcing ribs 6 are distributed at intervals along the third direction, which can not only fully and evenly support the second outer shell 25, but also reduce production costs.

[0059] It should also be noted that, in this invention, the first bolt, the second bolt, and the third bolt are all anti-loosening bolts, which enhance the connection strength between the components in the electromagnetic vibration device 100, enabling the electromagnetic vibration device 100 to operate stably for a long time and improving its practicality.

[0060] For details, please refer to Figure 1 The outer casing 11 is provided with a handle 7 on at least one of its two side walls in the third direction; this facilitates the movement of the electromagnetic vibration device 100 by the operator, improving work efficiency. More specifically, in one embodiment of the present invention, the outer casing 11 is provided with the handle 7 on both side walls in the third direction.

[0061] For details, please refer to Figure 1 and Figure 3The vibrating plate 3 has multiple triangularly arranged teeth 31 arranged in an array on the side facing away from the outer shell 11. In this way, when the electromagnet 22 is energized, the vibrating plate 3 can better couple with the ground, thereby improving the exploration accuracy and exploration depth.

[0062] For details, please refer to Figure 1 The outer casing assembly 1 further includes an upper cover 12, which covers the first opening; thus, it protects the component structure located in the first receiving groove 111 and extends the service life of the component.

[0063] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An electromagnetic excitation device, characterized in that, The electromagnetic excitation device includes: The housing assembly includes a housing body having a first receiving groove with a first opening in a first direction; A vibration excitation assembly, disposed within the first receiving groove, includes two permanent magnets and an electromagnet. The two permanent magnets are arranged opposite each other with the same pole along a second direction and are connected to the bottom wall of the first receiving groove. The electromagnet is disposed between the two permanent magnets and connected to the outer casing body. It is used to generate an excitation force acting on the outer casing body by vibrating back and forth between the two permanent magnets when an alternating current is applied. A vibrating plate is disposed on the bottom wall of the first receiving groove on the side facing away from the first opening, for coupling with the ground so that when the electromagnet is energized, it is subjected to the excitation force transmitted by the outer shell body and acts on the ground. Wherein, the first direction and the second direction are perpendicular to each other in the plane; The electromagnetic excitation device further includes at least one steel leaf spring, and the electromagnet is connected to the outer shell body through the steel leaf spring; The excitation assembly further includes two first housings disposed between the two permanent magnets and distributed sequentially along the second direction. The two first housings are detachably connected, and each first housing has a second receiving groove with a second opening facing the other first housing. The two second receiving grooves enclose a receiving space, and the electromagnet is housed in the receiving space. The leaf spring is connected to the first outer casing; The excitation assembly further includes two second housings spaced apart along the second direction, each second housing having a third receiving groove with an opening facing the other second housing, and each third receiving groove having a permanent magnet installed therein; Each of the second outer shells has a second connecting portion protruding from both ends in the third direction, and each of the second connecting portions has at least one U-shaped hole through it, and a second bolt is inserted into each of the U-shaped holes; The second outer casing is threadedly connected to the bottom wall of the first receiving groove by the second bolt.

2. The electromagnetic excitation device as described in claim 1, characterized in that, The steel leaf spring is provided in four parts, and each steel leaf spring extends along a third direction. The two ends of each steel leaf spring are connected to the two side walls of the first receiving groove in the third direction. The two first outer shells are respectively provided with first connecting parts at both ends in the first direction, and the four first connecting parts are connected to the middle parts of the four leaf springs one by one. Wherein, the third direction, the first direction, and the second direction are perpendicular to each other in the plane.

3. The electromagnetic excitation device as described in claim 2, characterized in that, The electromagnetic excitation device also includes eight fixing blocks, and each of the two ends of the steel leaf spring is connected to one of the fixing blocks; Each of the fixing blocks is disposed on one side wall of the first receiving groove in the third direction. Each of the fixing blocks has a slot facing the first receiving groove for one end of the leaf spring to be inserted. The two side walls of the first slot in the second direction are threadedly connected to the leaf spring by a first bolt.

4. The electromagnetic excitation device as described in claim 1, characterized in that, The electromagnet includes an iron core, a coil frame, and a coil. The iron core is inserted into the coil frame, and the coil is wound around the outer periphery of the coil frame. One of the two first outer shells has a wire groove for one end of the coil to extend out of the accommodating space and be electrically connected to an external power source, so that alternating current can be passed through the electromagnet.

5. The electromagnetic excitation device as described in claim 4, characterized in that, The excitation assembly further includes at least one reinforcing rib, which abuts against the side of the second housing away from the electromagnet; The reinforcing rib has two mounting holes, and a third bolt is inserted into each mounting hole. The reinforcing rib is threaded to the second outer shell through the third bolt inserted in one of the two mounting holes, and is threaded to the bottom wall of the first receiving groove through the third bolt inserted in the other of the two mounting holes. The mounting hole corresponding to the bottom wall of the first receiving groove is a U-shaped hole.

6. The electromagnetic excitation device as described in claim 1, characterized in that, The outer casing body has a handle on at least one of its two side walls facing the third direction; Wherein, the third direction, the first direction, and the second direction are perpendicular to each other in the plane.

7. The electromagnetic excitation device as described in claim 1, characterized in that, The vibrating plate has multiple teeth arranged in a triangular pattern on the side facing away from the main body of the outer shell.

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