Electromagnetic detection device and system

Abstract

This application provides an electromagnetic detection device and system, relating to the field of electromagnetic exploration technology. The electromagnetic detection device includes a first telescopic rod, a second telescopic rod, a power source, a first transmission mechanism, a support, a rotating shaft, and an electromagnetic detector. The support is located at one end of the first telescopic rod, and the rotating shaft is rotatably mounted on the support with its axis perpendicular to the axis of the first telescopic rod. The electromagnetic detector is mounted on the rotating shaft. The second telescopic rod and the power source are both located inside the first telescopic rod. The second telescopic rod is coaxial with the first telescopic rod, with one end connected to the power source and the other end connected to the rotating shaft via the first transmission mechanism. The second telescopic rod extends and retracts synchronously with the first telescopic rod. The power source can indirectly drive the rotating shaft to rotate around its own axis via the second telescopic rod and the first transmission mechanism, thereby causing the electromagnetic detector to rotate around the axis of the rotating shaft. Based on this, the pointing (i.e., angle) of the antenna in the electromagnetic detector can be adjusted, making it more practical and improving detection accuracy.

Description

Technical Field

[0001] This application relates to the field of electromagnetic exploration technology, and in particular to an electromagnetic detection device and system. Background Technology

[0002] Electromagnetic exploration is an important branch of geophysical exploration, typically achieved using electromagnetic detectors. When there are differences in the electromagnetic properties (such as conductivity, magnetism, and dielectric properties) of the underground medium, the incident electromagnetic field (artificially emitted or from a natural source) interacts with it, producing phenomena such as reflection, refraction, and induced eddy currents. This causes changes in the intensity, phase, and propagation direction of the electromagnetic field. These altered electromagnetic signals are the responses caused by changes in the electromagnetic properties of the underground medium (i.e., electromagnetic response signals). Electromagnetic detectors can collect these electromagnetic response signals, and by analyzing them (such as calculating parameters like apparent resistivity, impedance, and phase difference), the distribution patterns of the underground medium can be inferred. For example, if the electromagnetic response signal indicates that the electromagnetic field decays rapidly and has low apparent resistivity in a certain area, that area may be a highly conductive body (such as a mineral body or aquifer); if the electromagnetic response signal indicates that the electromagnetic field propagates stably and has high apparent resistivity in a certain area, that area may be a low conductive body (such as dry rock formations or oil and gas reservoirs).

[0003] In related technologies, the antenna is the component that performs signal acquisition in electromagnetic detectors. The adjustability of the antenna angle and spatial layout directly affects the detection accuracy and the quality of the detected data. However, the angle of existing electromagnetic detector antennas is usually fixed, which makes it impossible for electromagnetic detectors to accurately match the detection angle requirements of the corresponding detection area under complex geological conditions. This results in poor practicality and insufficient detection accuracy, ultimately affecting the detection effect of electromagnetic detectors. Utility Model Content

[0004] This application provides an electromagnetic detection device and system, which aims to solve the problem in related technologies where the angle of the electromagnetic detector antenna is fixed, resulting in unsatisfactory detection performance of the electromagnetic detector.

[0005] To address the aforementioned drawbacks in related technologies, this application provides an electromagnetic detection device. The device includes a first telescopic rod, a second telescopic rod, a power source, a first transmission mechanism, a support, a rotating shaft, and an electromagnetic detector. The support is located at one end of the first telescopic rod, and the rotating shaft is rotatably mounted on the support, with its axis perpendicular to the axis of the first telescopic rod. The electromagnetic detector is mounted on the rotating shaft. The second telescopic rod and the power source are both located within the first telescopic rod, with the power source located at the end of the first telescopic rod furthest from the support. The second telescopic rod is coaxial with the first telescopic rod, with one end connected to the power source and the other end connected to the rotating shaft via the first transmission mechanism. Specifically, the first telescopic rod is used to extend and retract under external force; the second telescopic rod is used to extend and retract synchronously with the first telescopic rod; the power source drives the second telescopic rod to rotate around its own axis; and the first transmission mechanism converts the rotation of the second telescopic rod into rotation of the rotating shaft around its own axis, thereby causing the electromagnetic detector to rotate around the axis of the rotating shaft.

[0006] In some implementations, the support includes a base plate and two side plates. The base plate is located at one end of the first telescopic rod, and the two side plates are positioned opposite each other and spaced apart on the base plate. The two ends of the rotating shaft are rotatably mounted on the side plates. In some implementations, the rotating shaft includes a shaft body, a crossbeam, a connecting pin, and two columns. The two ends of the shaft body are rotatably mounted on the side plates, and the two columns are positioned opposite each other and spaced apart on the shaft body, with the columns close to the side plates. The two ends of the crossbeam are located on the ends of the two columns furthest from the shaft body. One end of the connecting pin is located on the crossbeam. An electromagnetic detector is engaged with the connecting pin. The second telescopic rod is connected to the shaft body via a first transmission mechanism. In some implementations, the first transmission mechanism includes a worm gear and a worm. The worm gear is sleeved on the shaft body and located between the two columns. One end of the worm is connected to the end of the second telescopic rod furthest from the power source. The worm and the second telescopic rod are coaxial, and the worm meshes with the worm gear.

[0007] In some implementation schemes, the electromagnetic detector includes a detector body, a connector, and an antenna. The connector and the antenna are respectively located at opposite ends of the detector body, and the connector is inserted into the connector pin.

[0008] In some implementations, the connector is provided with a first connecting component and the connecting pin is provided with a second connecting component; when the connecting pin is inserted into the connector, the second connecting component is used to cooperate with the first connecting component to fix the connecting pin and the connector relative to each other. In some implementations, the connector is hollow inside, and one end of the connector has a socket that communicates with the interior. The socket is used for inserting the connector pin into the connector to achieve the insertion and engagement of the two. Two receiving tubes extending in opposite directions are formed on the outer wall of the connector, and both receiving tubes communicate with the interior of the connector. The first connecting component includes two connecting mechanisms, which are respectively located in the two receiving tubes. The connector pin is hollow inside, and the end of the connector pin that connects with the crossbeam has a through hole that communicates with the interior. Two channels that communicate with the interior are formed on the outer wall of the connector pin. The two channels are symmetrical about the axis of the connector pin. When the connector pin is inserted into the connector, the two channels are respectively connected to the two receiving tubes. The second connecting component is located inside the connector pin. One end of the second connecting component is forked and extends out from the two channels respectively, so as to cooperate with the two connecting mechanisms respectively when the connector pin is inserted into the connector.

[0009] In some implementation schemes, the connecting mechanism includes a push-pull rod, a retaining ring, and a first return spring. The push-pull rod is slidably engaged with the receiving tube. One end of the push-pull rod extends out of the receiving tube and is exposed to the outside, while the other end forms a contact head. The retaining ring is sleeved on the push-pull rod and spaced apart from the contact head. The first return spring is sleeved on the push-pull rod and located between the contact head and the retaining ring. One end of the first return spring is located on the retaining ring, and the other end is located on the inner wall of the receiving tube. The second connecting assembly includes a third telescopic rod, a second return spring, a baffle plate, two wedge blocks, and two second transmission mechanisms. The two wedge blocks are slidably disposed in the two channels respectively. One end of the third telescopic rod is disposed on the crossbeam through a through hole. The baffle plate is disposed on the other end of the third telescopic rod. The third telescopic rod is coaxial with the connecting pin, and the baffle plate is slidably engaged with the connecting pin. The second return spring is sleeved on the third telescopic rod. One end of the second return spring is disposed on the crossbeam through a through hole, and the other end is disposed on the baffle plate. One end of each of the two second transmission mechanisms is disposed on the baffle plate, and the other end is disposed on the two wedge blocks respectively.

[0010] In some implementations, the second transmission mechanism includes a connecting rod and a rotating rod rotatably mounted on a baffle. The axis of the rotating rod is perpendicular to the axis of the connecting pin. One end of the connecting rod is mounted on the rotating rod, and the other end is mounted on a wedge. In some implementations, the side of the wedge protruding from the channel has an inclined surface and a vertical surface connected to the inclined surface. The inclined surface is used to press the wedge into the channel during the insertion of the connecting pin into the connecting seat, and the vertical surface is used to abut against the contact head after the connecting pin and the connecting seat are inserted.

[0011] In some implementations, the first, second, and third telescopic rods each include at least two tubular rods, which are nested sequentially, with any two adjacent tubular rods slidingly engaged. In some implementations, any two adjacent tubular rods include a first tubular rod and a second tubular rod nested within the first tubular rod. The inner wall of the first tubular rod is provided with a first limiting structure, and the outer wall of the second tubular rod is provided with a second limiting structure. The first limiting structure cooperates with the second limiting structure to restrict the axial sliding range of the second tubular rod within the first tubular rod. In some implementations, the first limiting structure includes a groove extending axially from the first tubular rod, and the second limiting structure includes a slider inserted into and slidingly engaged with the groove.

[0012] The second aspect of this application provides an electromagnetic detection system, which includes a power supply, a housing, and the electromagnetic detection device provided in the first aspect of this application. The power supply is located inside the housing, and the end of the first telescopic rod of the electromagnetic detection device that is not connected to the bracket is located on the housing. The power source and the electromagnetic detector in the electromagnetic detection device are electrically connected to the power supply. In some implementations, there are two electromagnetic detection devices, which are respectively connected to opposite ends of the housing.

[0013] The electromagnetic detection device provided in the first aspect of this application comprises a first telescopic rod, a second telescopic rod, a power source, a first transmission mechanism, a bracket, a rotating shaft, and an electromagnetic detector. The bracket is located at one end of the first telescopic rod, and the rotating shaft is rotatably mounted on the bracket with its axis perpendicular to the axis of the first telescopic rod. The electromagnetic detector is mounted on the rotating shaft. The second telescopic rod and the power source are both located inside the first telescopic rod, with the power source located at the end of the first telescopic rod furthest from the bracket. The second telescopic rod is coaxial with the first telescopic rod, with one end connected to the power source and the other end connected to the rotating shaft via the first transmission mechanism. In practical applications, the user can operate the first telescopic rod to extend and retract it. Since the first telescopic rod, bracket, rotating shaft, first transmission mechanism, and second telescopic rod are sequentially connected, they are linked, which means that the second telescopic rod will extend and retract synchronously when the first telescopic rod extends and retracts. The user can also control the power source to drive the second telescopic rod to rotate around its own axis, and the first transmission mechanism can convert the rotation of the second telescopic rod into the rotation of the rotating shaft around its own axis. Since the electromagnetic detector is mounted on the rotating shaft, the electromagnetic detector will also rotate around the axis of the rotating shaft when the rotating shaft rotates around its own axis. Therefore, this application can adjust the position and attitude of the electromagnetic detector in space, thereby adjusting the pointing (i.e., angle) of the antenna in the electromagnetic detector. This enables the electromagnetic detection device to accurately match the detection angle requirements of the corresponding detection area under complex geological conditions, making it more practical and accurate, and effectively improving the detection effect of the electromagnetic detection device.

[0014] The electromagnetic detection system provided in the second aspect of this application includes the electromagnetic detection device provided in the first aspect of this application, and therefore possesses all the advantages of the electromagnetic detection device. Attached Figure Description

[0015] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the electromagnetic detection system provided in the embodiments of this application;

[0017] Figure 2 A three-dimensional half-sectional view of the first telescopic rod in the electromagnetic detection device provided in the embodiments of this application;

[0018] Figure 3 A three-dimensional half-sectional view of the second telescopic rod in the electromagnetic detection device provided in the embodiments of this application;

[0019] Figure 4 A three-dimensional half-sectional view of the connector in the electromagnetic detection device provided in the embodiment of this application;

[0020] Figure 5 A three-dimensional half-sectional view of the connecting pin in the electromagnetic detection device provided in the embodiment of this application.

[0021] The labels in the above figures represent: 1-shell, 2-electromagnetic detection device, 21-electromagnetic detector, 22-first telescopic rod, 23-second telescopic rod, 24-power source, 25-first transmission mechanism, 26-support, 27-rotating shaft, 28-first connecting assembly, 29-second connecting assembly, 211-detector body, 212-antenna, 213-connecting seat, 2131-receiving tube, 231-first tubular rod, 232-second tubular rod, 2311-sliding tube. 2321-Slider, 251-Worm Gear, 252-Worm, 261-Base Plate, 262-Side Plate, 271-Shaft, 272-Column, 273-Crossbeam, 274-Connecting Pin, 281-Push-Pull Rod, 282-Retaining Ring, 283-First Return Spring, 284-Contact Head, 291-Third Telescopic Rod, 292-Second Return Spring, 293-Baffle Plate, 294-Wedge Block, 295-Second Transmission Mechanism, 2941-Inclined Surface, 2942-Vertical Surface. Detailed Implementation

[0022] In related technologies, the adjustability of the angle and spatial layout of an electromagnetic detector antenna directly affects the detection accuracy and the quality of the detected data. However, the angle of existing electromagnetic detector antennas is usually fixed. This results in the electromagnetic detector being unable to accurately match the detection angle requirements of the corresponding detection area under complex geological conditions, leading to poor practicality and insufficient detection accuracy, ultimately affecting the detection effect of the electromagnetic detector. In view of this, this application proposes an electromagnetic detection device and system in the embodiments below to solve the above-mentioned drawbacks in related technologies.

[0023] To make the objectives, technical solutions, and advantages of this application more apparent and understandable, this application will be clearly and completely described below in conjunction with its embodiments and corresponding drawings. Throughout, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. It should be understood that the embodiments of this application described below are only for explaining this application and are not intended to limit this application. That is, all other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0024] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the electromagnetic detection system. Figure 2 This is a three-dimensional half-sectional view of the first telescopic rod in the electromagnetic detection device. This embodiment provides an electromagnetic detection system, which includes a power supply (not shown in the figure), a housing 1, and an electromagnetic detection device 2. The power supply is located inside the housing 1, and the electromagnetic detection device 2 is located on the housing 1. The electromagnetic detection device 2 is electrically connected to the power supply inside the housing 1, and the power supply can provide the electromagnetic detection device 2 with the electrical energy required for its operation.

[0025] In this embodiment, the electromagnetic detection device 2 includes a first telescopic rod 22, a second telescopic rod 23, a power source 24, a first transmission mechanism 25, a bracket 26, a rotating shaft 27, and an electromagnetic detector 21. One end of the first telescopic rod 22 is mounted on the housing 1, the bracket 26 is mounted on the other end of the first telescopic rod 22, the rotating shaft 27 is rotatably mounted on the bracket 26, and the axis of the rotating shaft 27 is perpendicular to the axis of the first telescopic rod 22. The electromagnetic detector 21 is mounted on the rotating shaft 27. The second telescopic rod 23 and the power source 24 are both located inside the first telescopic rod 22. The power source 24 is located at the end of the first telescopic rod 22 away from the bracket 26. The second telescopic rod 23 is coaxial with the first telescopic rod 22. One end of the second telescopic rod 23 is connected to the power source 24, and the other end is connected to the rotating shaft 27 through the first transmission mechanism 25. The power source 24 and the electromagnetic detector 21 are electrically connected to the power source inside the housing 1, and the power source can provide them with the electrical energy required for operation. Furthermore, it should be noted that the power source 24 can be any device commonly used in the art that has the ability to output rotational power, such as DC / AC motors, servo motors, stepper motors, hydraulic motors, pneumatic motors, swing cylinders, etc. The specific choice can be made according to actual needs, and this embodiment does not limit it to a single one.

[0026] In this embodiment, the first telescopic rod 22 is used to extend and retract under the action of external force; the second telescopic rod 23 is used to extend and retract synchronously with the first telescopic rod 22; the power source 24 is used to drive the second telescopic rod 23 to rotate around its own axis; the first transmission mechanism 25 is used to convert the rotation of the second telescopic rod 23 into the rotation of the rotating shaft 27 around its own axis, so that the electromagnetic detector 21 rotates around the axis of the rotating shaft 27.

[0027] In other words, in practical applications, the user can operate the first telescopic rod 22 to extend and retract it. Since the first telescopic rod 22, the bracket 26, the rotating shaft 27, the first transmission mechanism 25, and the second telescopic rod 23 are sequentially connected, they are linked, ensuring that the second telescopic rod 23 extends and retracts synchronously during the extension and retraction of the first telescopic rod 22. Furthermore, the user can control the power source 24 to drive the second telescopic rod 23 to rotate around its own axis. The first transmission mechanism 25 can convert the rotation of the second telescopic rod 23 into the rotation of the rotating shaft 27 around its own axis. Since the electromagnetic detector 21 is mounted on the rotating shaft 27, the electromagnetic detector 21 will also rotate around the axis of the rotating shaft 27 during its rotation, thus changing the position and orientation of the electromagnetic detector 21 in space. It should also be noted that the structure and working principle of the electromagnetic detector 21 are relatively mature technologies in the field; therefore, this embodiment will not describe the structure and working principle of the electromagnetic detector 21 in detail.

[0028] In this embodiment, the electromagnetic detection device 2 may include one or two. When two are included, the two electromagnetic detection devices 2 are respectively connected to opposite ends of the housing 1. It is understood that in practical applications, it may be difficult to accurately locate the depth of the underground medium using only a single electromagnetic detection device 2. Therefore, to improve the accuracy of depth detection by the electromagnetic detection system, an electromagnetic detection device 2 can be set at each opposite end of the housing 1. In this way, differential detection will be formed between the two electromagnetic detectors 21 in the two electromagnetic detection devices 2, that is, a large height difference will be formed between the two electromagnetic detectors 21. This allows the two electromagnetic detectors 21 to simultaneously measure the electromagnetic response signal at different height positions. The signal difference (gradient) between the two electromagnetic detectors 21 can then directly reflect the depth of the underground medium. Subsequently, their difference can be calculated as the effective output. In other words, the core of setting up two electromagnetic detection devices 2 is to utilize magnetic field gradient information to improve positioning accuracy, anti-interference capability, and depth calculation accuracy.

[0029] In this embodiment, the electromagnetic detection system, in addition to the structure described above, may also include other structures commonly found in electromagnetic detection systems in this field, such as a display screen and a controller, which will not be listed in detail here. Specifically, the display screen is mounted on the housing 1 and electrically connected to a power source inside the housing 1. The controller is mounted inside the housing 1 and electrically connected to the power source. The power source provides the display screen and controller with the electrical energy required for their operation. The display screen, power source 24, and electromagnetic detector 21 are communicatively connected to the controller. The operation of the display screen, power source 24, and electromagnetic detector 21 is all under the control of the controller. In practical applications, the display screen can display various data involved in the electromagnetic detection process, thus providing a clear view to the user. When the display screen has a touch function, the user can send commands to the controller through the display screen, so that the controller can control the operation of the power source 24 and electromagnetic detector 21 according to the user's commands, thereby adjusting the pose of the electromagnetic detector 21 so that the pointing (i.e., angle) of the antenna 212 meets the user's expectations. It should be noted that the controller can be any device commonly used in the field that has control and data processing and analysis functions, such as microcontrollers such as minicomputers and single-chip microcomputers, as well as industrial control computers (IPCs), programmable logic controllers (PLCs) and distributed control systems (DCS), etc. The specific choice can be made according to actual needs, and this embodiment does not limit it to a single one.

[0030] As can be seen from the above, the electromagnetic detector 21 can be adjusted in space to adjust the orientation (i.e., angle) of the antenna 212 in the electromagnetic detector 21. This enables the electromagnetic detection device 2 to accurately match the detection angle requirements of the corresponding detection area under complex geological conditions, making it more practical and accurate, and ultimately effectively improving the detection effect of the electromagnetic detection device 2.

[0031] In some embodiments, both the first telescopic rod 22 and the second telescopic rod 23 include at least two tubular rods, which are nested sequentially, and any two adjacent tubular rods are slidably engaged. Figure 2 As can be seen from the diagram, the first telescopic rod 22 comprises three sequentially nested tubular rods, and the second telescopic rod 23 comprises four sequentially nested tubular rods. However, those skilled in the art should know that... Figure 2 As an example only, the number of tubular rods in the first telescopic rod 22 and the second telescopic rod 23 are designed according to actual needs, and this application does not limit this to a single one, as does the third telescopic rod 291 described below.

[0032] As at least one embodiment, please refer to Figure 3 , Figure 3 This is a three-dimensional half-sectional view of the second telescopic rod in the electromagnetic detection device. Taking the second telescopic rod 23 as an example, any two adjacent tubular rods include a first tubular rod 231 and a second tubular rod 232 nested inside the first tubular rod 231. The inner wall of the first tubular rod 231 is provided with a first limiting structure, and the outer wall of the second tubular rod 232 is provided with a second limiting structure. The first limiting structure can cooperate with the second limiting structure to limit the axial sliding range of the second tubular rod 232 within the first tubular rod 231. This not only prevents the second tubular rod 232 from detaching from the first tubular rod 231 due to excessive sliding, but also ensures the stability of the second tubular rod 232 during sliding. For example, the first limiting structure includes a groove 2311 extending axially in the first tubular rod 231, and the second limiting structure includes a slider 2321, which is inserted into the groove 2311 and slides in cooperation with the groove 2311. That is, the sliding range of the second tubular rod 232 is limited by the sliding cooperation between the slider 2321 and the groove 2311.

[0033] In some embodiments, please combine Figure 4 and Figure 5 , Figure 4 This is a three-dimensional half-section view of the connector in the electromagnetic detection device. Figure 5This is a three-dimensional half-sectional view of the connecting pin in the electromagnetic detection device. The bracket 26 includes a base plate 261 and two side plates 262. The base plate 261 is located at one end of the first telescopic rod 22. The two side plates 262 are located opposite to each other and spaced apart on the base plate 261. The two ends of the rotating shaft 27 are rotatably mounted on the two side plates 262, that is, the two side plates 262 provide support for the rotation of the rotating shaft 27. Based on this, the rotating shaft 27 includes a shaft body 271, a crossbeam 273, a connecting pin 274, and two columns 272. The two ends of the shaft body 271 are rotatably mounted on the two side plates 262. One end of each column 272 is positioned opposite to and spaced apart from the other end on the shaft body 271. The two columns 272 are respectively close to the two side plates 262. The two ends of the crossbeam 273 are respectively located on the ends of the two columns 272 away from the shaft body 271. One end of the connecting pin 274 is located on the crossbeam 273. The electromagnetic detector 21 is inserted into the connecting pin 274. The second telescopic rod 23 is connected to the shaft body 271 via the first transmission mechanism 25. Further, the electromagnetic detector 21 includes a detector body 211, a connecting seat 213, and an antenna 212. The connecting seat 213 and the antenna 212 are respectively located at opposite ends of the detector body 211. The connecting seat 213 is inserted into the connecting pin 274. It should be noted that antenna 212 may include, but is not limited to, dipole antennas, monopole antennas, loop antennas, patch antennas, helical antennas, log-periodic antennas, and horn antennas, etc., and the specific type can be selected according to actual needs. This application does not impose a unique limitation on this type. For example, the antenna 212 of this application adopts an RTK (Real-Time Kinematic) antenna.

[0034] As at least one embodiment, the first transmission mechanism 25 includes a worm wheel 251 and a worm 252. The worm wheel 251 is sleeved on the shaft 271 and located between the two columns 272. One end of the worm 252 is connected to the end of the second telescopic rod 23 away from the power source 24. The worm 252 and the second telescopic rod 23 are coaxial, and the worm 252 meshes with the worm wheel 251. It is understandable that when the power source 24 drives the second telescopic rod 23 to rotate, the worm gear 252, which is coaxial with and connected to the second telescopic rod 23, will rotate synchronously. Then, the worm wheel 251, which meshes with the worm gear 252, will rotate the shaft 271 around its axis. Since the crossbeam 273, the connecting pin 274, and the two columns 272 are all linked to the shaft 271 and the electromagnetic detector 21 is inserted on the connecting pin 274, the electromagnetic detector 21 will also rotate synchronously around the axis of the shaft 271 during the rotation of the shaft 271 around its own axis, thereby realizing the angle adjustment of the antenna 212.

[0035] In at least one embodiment, the connecting seat 213 is provided with a first connecting component 28, and the connecting pin 274 is provided with a second connecting component 29. When the connecting pin 274 is inserted into the connecting seat 213, the second connecting component 29 can cooperate with the first connecting component 28 to fix the connecting pin 274 and the connecting seat 213 relatively, thereby reducing the risk of the electromagnetic detector 21 falling off during electromagnetic detection and ensuring the stability of the electromagnetic detector 21 during rotation. Specifically, the connecting seat 213 is hollow inside, and one end of the connecting seat 213 is provided with an insertion hole that communicates with the interior. The insertion hole is used for the connecting pin 274 to be inserted into the connecting seat 213. Two receiving tubes 2131 extending in opposite directions are formed on the outer wall of the connecting seat 213. Both receiving tubes 2131 are connected to the interior of the connecting seat 213. The first connecting component 28 includes two connecting mechanisms, which are respectively disposed in the two receiving tubes 2131. Based on this, the connecting pin 274 is hollow inside. One end of the connecting pin 274 that connects to the crossbeam 273 has a through hole that communicates with the interior. The outer wall of the connecting pin 274 has two channels that communicate with the interior. The two channels are symmetrical about the axis of the connecting pin 274. When the connecting pin 274 is inserted into the connecting seat 213, the two channels are respectively connected to the two receiving tubes 2131. The second connecting component 29 is located inside the connecting pin 274. One end of the second connecting component 29 is forked and passes through the two channels respectively, so that it cooperates with the two connecting mechanisms respectively when the connecting pin 274 is inserted into the connecting seat 213.

[0036] Furthermore, the connecting mechanism includes a push-pull rod 281, a retaining ring 282, and a first return spring 283. The push-pull rod 281 is slidably engaged with the receiving tube 2131. One end of the push-pull rod 281 extends out of the receiving tube 2131 to be exposed, and the other end forms a contact head 284. The size of the contact head 284 is slightly larger than the rod diameter of the push-pull rod 281. The retaining ring 282 is sleeved on the push-pull rod 281 and spaced apart from the contact head 284. The first return spring 283 is sleeved on the push-pull rod 281 and located between the contact head 284 and the retaining ring 282. One end of the first return spring 283 is located on the retaining ring 282, and the other end is located on the inner wall of the receiving tube 2131. Based on this, the second connecting assembly 29 includes a third telescopic rod 291, a second return spring 292, a baffle 293, two wedge blocks 294, and two second transmission mechanisms 295. The two wedge blocks 294 are slidably disposed in the two channels, one end of the third telescopic rod 291 is disposed on the crossbeam 273 through a through hole, and the baffle 293 is disposed on the other end of the third telescopic rod 291. The third telescopic rod 291 is coaxial with the connecting pin 274, and the baffle 293 is slidably engaged with the connecting pin 274. The second return spring 292 is sleeved on the third telescopic rod 291. One end of the second return spring 292 is set on the crossbeam 273 through a through hole, and the other end is set on the baffle 293. One end of each of the two second transmission mechanisms 295 is set on the baffle 293, and the other end is set on the two wedge blocks 294 respectively. It can be seen that the purpose of opening a through hole at the end of the connecting pin 274 that connects to the crossbeam 273 is to facilitate setting one end of the third telescopic rod 291 and the second return spring 292 on the crossbeam 273.

[0037] In practical applications, when the connecting pin 274 is inserted into the connecting seat 213, the first return spring 283 and the second return spring 292 are both at their original lengths (i.e., neither stretched nor compressed), the third telescopic rod 291 extends, and the ends of the two wedge blocks 294 not connected to the corresponding second transmission mechanism 295 pass through the two channels respectively and are inserted into the two receiving tubes 2131 to abut against the contact heads 284 of the two push-pull rods 281. At this time, the connecting pin 274 and the connecting seat 213 are relatively fixed. When it is necessary to separate the connecting seat 213 from the connecting pin 274, the user can apply opposing forces to the two push-pull rods 281, causing the two push-pull rods 281 to move towards each other. At this time, both first return springs 283 are compressed, and the two wedge blocks 294 will respectively be pushed against the two contact heads 284. The two wedge blocks 294 move in opposite directions and retract into the two channels respectively. The two second transmission mechanisms 295 can convert the opposite movement of the two wedge blocks 294 into the sliding of the baffle 293 towards the crossbeam 273, causing the third telescopic rod 291 to shorten and the second return spring 292 to be compressed. Then, the user can pull out the connecting seat 213 along the axial direction of the connecting pin 274, thus realizing the portable disassembly of the electromagnetic detector 21. When it is necessary to install the electromagnetic detector 21, the user can insert the connecting pin 274 into the connecting seat 213. The two wedge blocks 294 will slide into the two receiving tubes 2131 along the inner side wall of the connecting seat 213 respectively. Finally, the two wedge blocks 294 will abut against the contact heads 284 of the two push-pull rods 281 respectively, thus realizing the portable installation of the electromagnetic detector 21.

[0038] For example, the second transmission mechanism 295 includes a connecting rod and a rotating rod rotatably mounted on the baffle 293. The axis of the rotating rod is perpendicular to the axis of the connecting pin 274. One end of the connecting rod is mounted on the rotating rod, and the other end is mounted on the wedge block 294. It is understood that in practical applications, when the two wedge blocks 294 move towards each other under the push of the two push-pull rods 281, the two connecting rods will cause the two rotating rods to rotate around their respective axes, and the rotation directions of the two rotating rods are opposite. This reduces the included angle between the two connecting rods and the corresponding wedge blocks 294, thereby pushing the baffle 293 to slide towards the crossbeam 273.

[0039] For example, the side of the wedge block 294 that protrudes from the channel has an inclined surface 2941 and a vertical surface 2942 that is connected to the inclined surface 2941. The inclined surface 2941 plays a guiding role during the process of inserting the connecting pin 274 into the connecting seat 213, which allows the wedge block 294 to be pressed into the channel. Finally, the wedge block 294 will slide along the inner wall of the connecting seat 213 into the corresponding receiving tube 2131, and its vertical surface 2942 will abut against the contact head 284 of the corresponding push-pull rod 281, thereby realizing the insertion and fixation of the connecting pin 274 and the connecting seat 213.

[0040] The above embodiments are merely preferred implementations of this application and are not the only limitation on the electromagnetic detection device 2 and the electromagnetic detection system. Those skilled in the art can make flexible settings based on the above embodiments according to actual application scenarios. It is understood that through the implementation of the above embodiments of this application, the electromagnetic detection device 2 is constituted using the first telescopic rod 22, the second telescopic rod 23, the power source 24, the first transmission mechanism 25, the bracket 26, the rotating shaft 27, and the electromagnetic detector 21. The bracket 26 is located at one end of the first telescopic rod 22, the rotating shaft 27 is rotatably mounted on the bracket 26 with its axis perpendicular to the axis of the first telescopic rod 22, the electromagnetic detector 21 is mounted on the rotating shaft 27, and the second telescopic rod 23 and the power source 24 are both located inside the first telescopic rod 22. The power source 24 is located within the first telescopic rod 22. At the end furthest from the support 26, the second telescopic rod 23 is coaxial with the first telescopic rod 22, with one end connected to the power source 24 and the other end connected to the rotating shaft 27 via the first transmission mechanism 25. In practical applications, the first telescopic rod 22 can extend and retract under external force, and the second telescopic rod 23 can extend and retract synchronously with the first telescopic rod 22. The power source 24 can drive the second telescopic rod 23 to rotate around its own axis, and the first transmission mechanism 25 can convert the rotation of the second telescopic rod 23 into the rotation of the rotating shaft 27 around its own axis, so that the electromagnetic detector 21 rotates around the axis of the rotating shaft 27. Therefore, this application can adjust the position and attitude of the electromagnetic detector 21 in space, thereby adjusting the pointing (i.e., angle) of the antenna 212 in the electromagnetic detector 21. This allows the electromagnetic detection device 2 to accurately match the detection angle requirements of the corresponding detection area under complex geological conditions, making it more practical and accurate, and effectively improving the detection effect of the electromagnetic detection device 2.

[0041] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic detection device, characterized in that, The device includes a first telescopic rod, a second telescopic rod, a power source, a first transmission mechanism, a bracket, a rotating shaft, and an electromagnetic detector. The bracket is located at one end of the first telescopic rod. The rotating shaft is rotatably mounted on the bracket, and its axis is perpendicular to the axis of the first telescopic rod. The electromagnetic detector is mounted on the rotating shaft. The second telescopic rod and the power source are both located inside the first telescopic rod. The power source is located at the end of the first telescopic rod away from the bracket. The second telescopic rod is coaxial with the first telescopic rod, with one end connected to the power source and the other end connected to the rotating shaft via the first transmission mechanism. The first telescopic rod is used to extend and retract under the action of external force; The second telescopic rod is used to extend and retract synchronously with the first telescopic rod; The power source is used to drive the second telescopic rod to rotate around its own axis; The first transmission mechanism is used to convert the rotation of the second telescopic rod into the rotation of the rotating shaft about its own axis, so that the electromagnetic detector rotates about the axis of the rotating shaft.

2. The electromagnetic detection apparatus of claim 1, wherein The bracket includes a base plate and two side plates. The base plate is located at one end of the first telescopic rod, and the two side plates are located opposite each other and spaced apart from each other on the base plate. The two ends of the rotating shaft are respectively rotatably located on the two side plates.

3. The electromagnetic detection apparatus of claim 2, wherein, The rotating shaft includes a shaft body, a crossbeam, a connecting pin, and two columns. The two ends of the shaft body are rotatably mounted on the two side plates. One end of each of the two columns is positioned opposite to and spaced apart from the other on the shaft body. The two columns are respectively close to the two side plates. The two ends of the crossbeam are respectively located on the ends of the two columns away from the shaft body. One end of the connecting pin is located on the crossbeam. The electromagnetic detector is inserted into the connecting pin. The second telescopic rod is connected to the shaft body through the first transmission mechanism.

4. The electromagnetic detection device according to claim 3, characterized in that, The first transmission mechanism includes a worm gear and a worm. The worm gear is sleeved on the shaft and located between the two columns. One end of the worm is connected to the end of the second telescopic rod away from the power source. The worm and the second telescopic rod are coaxial, and the worm meshes with the worm gear.

5. The electromagnetic detection device according to claim 3, characterized in that, The electromagnetic detector includes a detector body, a connector, and an antenna. The connector and the antenna are respectively located at opposite ends of the detector body, and the connector is inserted into the connector pin.

6. The electromagnetic detection device according to claim 5, characterized in that, The connector is provided with a first connecting component, and the connecting pin is provided with a second connecting component; When the connecting pin is inserted into the connecting seat, the second connecting component is used to cooperate with the first connecting component to fix the connecting pin and the connecting seat relative to each other.

7. The electromagnetic detection device according to claim 6, characterized in that, The connector is hollow inside, and one end of the connector has a socket that communicates with the interior. The socket is used for inserting the connecting pin into the connector. Two receiving tubes extending in opposite directions are formed on the outer side wall of the connector. Both receiving tubes communicate with the interior of the connector. The first connecting assembly includes two connecting mechanisms, and the two connecting mechanisms are respectively disposed in the two receiving tubes. The connecting pin is hollow inside. One end of the connecting pin that connects to the crossbeam has a through hole that communicates with the interior. Two channels that communicate with the interior are opened on the outer side wall of the connecting pin. The two channels are symmetrical about the axis of the connecting pin. When the connecting pin is inserted into the connecting seat, the two channels are respectively connected to the two receiving tubes. The second connecting component is located inside the connecting pin. One end of the second connecting component is forked and protrudes from the two channels respectively, so as to cooperate with the two connecting mechanisms respectively when the connecting pin is inserted into the connecting seat.

8. The electromagnetic detection device according to claim 7, characterized in that, The connecting mechanism includes a push-pull rod, a retaining ring, and a first return spring. The push-pull rod is slidably engaged with the receiving tube. One end of the push-pull rod extends out of the receiving tube and is exposed to the outside, while the other end forms a contact head. The retaining ring is sleeved on the push-pull rod and spaced apart from the contact head. The first return spring is sleeved on the push-pull rod and located between the contact head and the retaining ring. One end of the first return spring is located on the retaining ring, and the other end is located on the inner wall of the receiving tube. The second connecting assembly includes a third telescopic rod, a second return spring, a baffle, two wedge blocks, and two second transmission mechanisms. The two wedge blocks are slidably disposed in the two channels respectively. One end of the third telescopic rod is disposed on the crossbeam through the through hole, and the baffle is disposed on the other end of the third telescopic rod. The third telescopic rod is coaxial with the connecting pin, and the baffle is slidably engaged with the connecting pin. The second return spring is sleeved on the third telescopic rod, with one end of the second return spring disposed on the crossbeam through the through hole and the other end disposed on the baffle. One end of each of the two second transmission mechanisms is disposed on the baffle, and the other end is disposed on the two wedge blocks respectively.

9. The electromagnetic detection device according to claim 8, characterized in that, The second transmission mechanism includes a connecting rod and a rotating rod rotatably mounted on the baffle. The axis of the rotating rod is perpendicular to the axis of the connecting pin. One end of the connecting rod is mounted on the rotating rod, and the other end is mounted on the wedge block.

10. The electromagnetic detection device according to claim 8, characterized in that, The wedge-shaped block has an inclined surface and a vertical surface connected to the inclined surface on one side of the channel. The inclined surface is used to press the wedge-shaped block back into the channel during the process of inserting the connecting pin into the connecting seat. The vertical surface is used to abut against the contact head after the connecting pin is inserted into the connecting seat.

11. The electromagnetic detection device according to claim 8, characterized in that, The first telescopic rod, the second telescopic rod, and the third telescopic rod each include at least two tubular rods, which are nested sequentially, and any two adjacent tubular rods are slidably engaged.

12. The electromagnetic detection device according to claim 11, characterized in that, Any two adjacent tubular rods include a first tubular rod and a second tubular rod nested within the first tubular rod. The inner wall of the first tubular rod is provided with a first limiting structure, and the outer wall of the second tubular rod is provided with a second limiting structure. The first limiting structure is used to cooperate with the second limiting structure to limit the axial sliding range of the second tubular rod within the first tubular rod.

13. The electromagnetic detection device according to claim 12, characterized in that, The first limiting structure includes a groove extending axially in the first tubular rod, and the second limiting structure includes a slider inserted into the groove and slidingly engaging with the groove.

14. An electromagnetic detection system, characterized in that, The device includes a power supply, a housing, and an electromagnetic detection device as described in any one of claims 1 to 13. The power supply is located inside the housing. One end of the first telescopic rod in the electromagnetic detection device that is not connected to the bracket is located on the housing. The power source and the electromagnetic detector in the electromagnetic detection device are electrically connected to the power supply, respectively.

15. The electromagnetic detection system according to claim 14, characterized in that, The electromagnetic detection device comprises two devices, which are respectively connected to opposite ends of the housing.

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