A multi-channel magnetic induction through-the-earth transmission system

Abstract

The utility model discloses a kind of multi-channel magnetic induction ground penetrating transmission systems, it is related to communication technical field, the utility model is separately laid out transmitting coil group and receiving coil group in underground space and ground space, transmitting coil group and the magnetic induction coil of multiple array arrangement in receiving coil group are rectangular array or circular array arrangement, and the spacing between magnetic induction coil and magnetic induction coil is higher than 3 times coil diameter, in transmission process, because the mutual inductance between coil and coil turns, coil area is directly proportional, and inversely proportional to distance, when the spacing between array arrangement magnetic induction coil is higher than 3 times coil diameter, coil mutual inductance will be much larger than coil self-induction, at this time, the interference between magnetic induction coil is minimal, ensure that information data on each magnetic induction coil will not appear disorder when transmitting, to realize the efficient accurate transmission of information.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a multi-channel magnetic induction ground-penetrating transmission system. Background Technology

[0002] Trans-ground communication is a technology that uses electromagnetic waves of very low frequency or lower to pass through the strata to achieve communication between the ground and underground. Its main methods include antenna magnetic induction, ground electrode current field and elastic wave. All three methods exhibit the characteristic that the higher the frequency, the greater the signal attenuation. Among them, the ground electrode method has higher energy efficiency and is more stable in terms of being affected by the stratum structure. Antenna magnetic induction has a wide range of applications. This technology is suitable for underground emergency scenarios such as mine rescue and subway communication. The vertical communication distance can reach 800-1000 meters.

[0003] Magnetic communication technology has potential applications in underground communication and special environment monitoring due to its permeability to ground and water and its high confidentiality. However, current magnetic communication technology is limited by its physical characteristics, resulting in significant bottlenecks in transmission rate and distance, making it difficult to meet the needs of large data transmission. Meanwhile, although traditional radio frequency communication has a high transmission rate, it suffers from defects such as inability to penetrate ground and poor diffraction ability, which limits its application in special scenarios such as underground environments. In addition, data transmission in underground scenarios mainly relies on wired methods, but this method has problems such as high installation difficulty and complex wiring, which cannot meet the needs of rapid deployment and flexible communication.

[0004] To address the problems described above, current methods typically involve using multiple magnetic communication devices in parallel for simultaneous transmission to increase transmission rate and distance. However, when multiple magnetic communication devices are used simultaneously, the wide range of magnetic induction radiation leads to significant interference between devices during transmission, causing information to become disordered and making it difficult to achieve efficient and accurate information transmission. Utility Model Content

[0005] This utility model provides a multi-channel magnetic induction ground-penetrating transmission system, which can solve the problems existing in the prior art.

[0006] This utility model provides a multi-channel magnetic induction ground-penetrating transmission system, including a transmitting coil group and a receiving coil group, wherein the transmitting coil group and the receiving coil group are respectively deployed in underground space and above-ground space; Both the transmitting coil group and the receiving coil group are composed of multiple arrayed magnetic induction coils, and the distance between each magnetic induction coil and its adjacent magnetic induction coil is more than 3 times the coil diameter. A transmitter connected to a transmitting coil group controls the current change of the transmitting coil group to generate multiple alternating magnetic fields, which are used to transmit multiple information data sub-packets corresponding to the alternating magnetic fields into the underground space. The receiving coil group senses multiple alternating magnetic fields transmitted from the ground. The receiver connected to the receiving coil group converts the magnetic signals corresponding to the multiple alternating magnetic fields into multiple electrical signals, and identifies the multiple information data sub-packets transmitted based on the multiple electrical signals.

[0007] Preferably, it also includes a data acquisition module, a data processing module, and a data restoration module; The data acquisition module uses a high-definition camera or microphone to collect video images and audio signals in the scene in real time and form raw information data; The data processing module divides the collected raw information data into packets to generate information data sub-packets containing identification fields. The transmitter controls the transmission coil group to generate an alternating magnetic field corresponding to the information data sub-packet. The data restoration module decodes, verifies, sorts, and splices the received information data sub-packets to restore them to the original video or audio data.

[0008] Preferably, when processing the collected raw information data into packets, a complete frame of data is divided into multiple information data sub-packets according to the transmission capacity of the magnetic induction coil on a single channel, and an identifier field containing sequence identifier and verification information is added to each information data sub-packet. Among them, multiple information data sub-packets correspond one-to-one with multiple magnetic induction coils.

[0009] Preferably, when processing the collected raw information data into packets, the video images and audio signals are randomly packetized according to frame size.

[0010] Preferably, the plurality of magnetic induction coils are arranged in a rectangular array, a circular array, or a triangular array.

[0011] Preferably, the transmitting coil group and the receiving coil group in the underground space and the above-ground space are placed coaxially, and the magnetic induction coils in the transmitting coil group and the receiving coil group correspond one-to-one.

[0012] Preferably, the magnetic induction coil pairs within the transmitting coil group and the receiving coil group constitute independent magnetic induction coil channels, and multiple magnetic induction coil pairs simultaneously transmit different information data sub-packets.

[0013] This utility model provides a multi-channel magnetic induction ground-penetrating transmission system, which has the following advantages compared with the prior art: This invention involves deploying transmitting and receiving coil groups in underground and above-ground spaces, respectively. The transmitting and receiving coil groups contain multiple arrays of magnetic induction coils arranged in rectangular or circular arrays, with the spacing between the magnetic induction coils exceeding three times their diameter. During transmission, because the mutual inductance between coils is directly proportional to the number of turns and the coil area, and inversely proportional to the distance, when the spacing between the arrayed magnetic induction coils exceeds three times their diameter, the mutual inductance will be much greater than the self-inductance. This results in minimal interference between the magnetic induction coils, ensuring that the information data on each magnetic induction coil is transmitted smoothly without disorder, thus achieving highly efficient and accurate information transmission. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall framework of a multi-channel magnetic induction ground-penetrating transmission system provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the transmission process of a multi-channel magnetic induction ground-penetrating transmission system provided for an embodiment of the present invention. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Currently, in ground-penetrating transmission, magnetic communication technology utilizes changes in magnetic fields to transmit signals and has ground-penetrating capabilities. However, its transmission rate is low, supporting only small data transmissions and failing to meet the requirements of large data transmissions such as video and voice. Traditional radio frequency communication technology has a high transmission rate, but electromagnetic waves attenuate severely when penetrating the ground, making ground-penetrating transmission impossible. Furthermore, its diffraction capability is poor, resulting in limited signal coverage in underground environments. Wired transmission technology transmits data through physical cables and is commonly used for data transmission in underground scenarios. However, its installation requires complex wiring, making construction difficult and lacking in flexibility, making it difficult to deploy quickly in emergency rescue and other scenarios.

[0022] Based on the problems existing in current ground-penetrating transmission, this utility model provides a multi-channel magnetic induction ground-penetrating transmission system, such as... Figure 1 As shown, it includes: a data acquisition module, a data processing module, a transmission module, a receiving module, and a data restoration module. Specifically:

[0023] 1. Data acquisition module.

[0024] Components: Includes high-definition camera, microphone, and other equipment.

[0025] Function: Real-time acquisition of video images and audio signals from underground scenes, providing raw information for data transmission.

[0026] 2. Data processing module.

[0027] Core functions: The system can process the collected raw data into sub-packages to generate data sub-packages containing identifier fields; it can also perform preprocessing such as data compression to further reduce the data volume.

[0028] Hardware: Composed of embedded processors or dedicated data processing chips, with high-speed data processing capabilities.

[0029] 3. Transmission module.

[0030] Structure: It consists of a transmitting coil group composed of multiple magnetic induction coils arranged in a specific array (such as a rectangular array, a circular array, etc.).

[0031] Working principle: The data sub-packets generated by the data processing module are loaded into each transmitting coil, and an alternating magnetic field is generated by the change of current to realize the transmission of data through the ground.

[0032] Key settings: When two coils are placed coaxially, the mutual inductance M between the coils is directly proportional to the number of coil turns N and the coil area S, and inversely proportional to the distance d. In practical applications, when the coils are arranged in this way, the distance d between the two coils should be greater than 3 times the coil diameter, so that the mutual inductance M >> the coil self-inductance L. This can avoid the problem of mutual interference between the coils at the transmitting end.

[0033] 4. Receiving module.

[0034] Composition: An array of receiving coils corresponding to the transmitting module, with the number of coils matching that of the transmitting end and their positions corresponding one-to-one with the transmitting coils.

[0035] Function: Sensing changes in the magnetic field transmitted from the ground, converting the magnetic signal into an electrical signal, and extracting data sub-packets.

[0036] 5. Data restoration module.

[0037] Processing flow: The received data sub-packets are decoded, verified, sorted, and spliced ​​to restore the original video or audio data.

[0038] Output method: The restored data is output to a display device or audio playback device for users to view or listen to.

[0039] Working principle: Taking video transmission as an example, after the camera captures video frame data, the data processing module divides each frame into N data sub-packets (N is the number of magnetic communication channels) and adds identification information such as frame sequence number and sub-packet sequence number to each sub-packet. The transmitting module synchronously transmits N sub-packets through N transmitting coils, and the receiving module synchronously receives data through N receiving coils. The data restoration module splices the N sub-packets into a complete frame according to the identification information, and realizes real-time video transmission by continuously processing multiple frames of data. The principle of voice transmission is similar to that of video, only the data acquisition and processing methods are different.

[0040] The transmission process specifically includes: 1. Data packet processing.

[0041] Processing target: Video frame data captured by the camera or audio data captured by the microphone.

[0042] Processing method: Based on the transmission capacity of a single magnetic communication channel, a complete frame of data is divided into multiple data sub-packets, and an identification field containing sequence identifiers, verification information, etc. is added to each sub-packet so that the receiving end can perform data splicing and verification.

[0043] Effect: Reduces the amount of data transmitted in a single channel, enabling each channel to complete data transmission within the frame interval, laying the foundation for multi-channel parallel transmission.

[0044] 2. Multi-channel parallel transmission.

[0045] Hardware foundation: An array of magnetic induction coils is used as the transmission medium. Each coil constitutes an independent magnetic communication channel, and each channel can transmit different data sub-packets simultaneously.

[0046] Transmission process: The transmitter loads the divided data sub-packets into different magnetic induction coil channels, and achieves transmission through the ground by changing the magnetic field; the receiver is equipped with an array of receiving coils to synchronously receive the data transmitted from each channel.

[0047] Advantages: By utilizing the characteristics of multi-channel parallel transmission, the overall data transmission rate is greatly improved, breaking through the rate bottleneck of single-channel magnetic communication.

[0048] 3. Data reception and splicing / restoration.

[0049] Reception and processing: The receiving end uses an array of coils to receive data sub-packets from each channel and classifies and sorts the data using an identification field.

[0050] Concatenation and restoration: Based on the sequential identifier of the data sub-packets, multiple sub-packets are concatenated into complete frame data, which is then decoded and restored to the original video or audio information.

[0051] Key component: Through precise matching and validation mechanisms of the identifier fields, the accuracy and integrity of data splicing are ensured.

[0052] This invention employs an array of magnetic induction coils to construct multiple independent communication channels, enabling parallel transmission of data sub-packets; it breaks through the single-channel magnetic communication transmission rate limitation, improving the efficiency of large-volume data transmission; through multi-channel parallel transmission, the system data transmission rate is increased by N times (N is the number of channels), meeting the real-time transmission needs of video, voice, etc.

[0053] This invention divides large-volume frame data into multiple sub-packets and achieves precise splicing at the receiving end through an identification field; it adapts to the low-speed characteristics of single-channel magnetic communication, making large-volume data transmission possible; it ensures that the segmented data sub-packets can be transmitted within the magnetic communication frame interval, guaranteeing the real-time performance and integrity of data transmission.

[0054] This invention employs an array-type coil layout for both the transmitter and receiver, with each coil operating independently yet transmitting data collaboratively. It provides the hardware foundation for multi-channel magnetic induction communication, enabling parallel data transmission in ground-penetrating scenarios. The distance between the transmitter coils should be greater than three times the coil diameter to reduce mutual inductance. The magnetic field distribution is optimized through the coil array, thereby improving the stability and anti-interference capability of signal transmission.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-channel magnetic induction ground-penetrating transmission system, characterized in that, include: The transmitting coil group and the receiving coil group are respectively deployed in underground space and above-ground space; Both the transmitting coil group and the receiving coil group are composed of multiple arrayed magnetic induction coils, and the distance between each magnetic induction coil and its adjacent magnetic induction coil is more than 3 times the coil diameter. A transmitter connected to a transmitting coil group controls the current change of the transmitting coil group to generate multiple alternating magnetic fields, which are used to transmit multiple information data sub-packets corresponding to the alternating magnetic fields into the underground space. The receiving coil group senses multiple alternating magnetic fields transmitted from the ground. The receiver connected to the receiving coil group converts the magnetic signals corresponding to the multiple alternating magnetic fields into multiple electrical signals, and identifies the multiple information data sub-packets transmitted based on the multiple electrical signals.

2. The multi-channel magnetic induction ground-penetrating transmission system according to claim 1, characterized in that, Also includes: Data acquisition module, data processing module, and data restoration module; The data acquisition module uses a high-definition camera or microphone to collect video images and audio signals in the scene in real time and form raw information data; The data processing module divides the collected raw information data into packets to generate information data sub-packets containing identification fields. The transmitter controls the transmission coil group to generate an alternating magnetic field corresponding to the information data sub-packet. The data restoration module decodes, verifies, sorts, and splices the received information data sub-packets to restore them to the original video or audio data.

3. The multi-channel magnetic induction ground-penetrating transmission system according to claim 2, characterized in that, When processing the collected raw information data into packets, a complete frame of data is divided into multiple information data sub-packets according to the transmission capacity of the magnetic induction coil on a single channel, and an identifier field containing sequence identifier and verification information is added to each information data sub-packet. Among them, multiple information data sub-packets correspond one-to-one with multiple magnetic induction coils.

4. A multi-channel magnetic induction ground-penetrating transmission system according to claim 2, characterized in that, When processing the collected raw information data into packets, video images and audio signals are randomly packetized according to frame size.

5. A multi-channel magnetic induction ground-penetrating transmission system according to claim 1, characterized in that, The multiple magnetic induction coils are arranged in a rectangular array, a circular array, or a triangular array.

6. A multi-channel magnetic induction ground-penetrating transmission system according to claim 1, characterized in that, The transmitting coil group and receiving coil group in the underground space and the above-ground space are placed coaxially, and the magnetic induction coils in the transmitting coil group and the receiving coil group correspond one-to-one.

7. A multi-channel magnetic induction ground-penetrating transmission system according to claim 6, characterized in that, The magnetic induction coil pairs within the transmitting coil group and the receiving coil group constitute independent magnetic induction coil channels, and multiple magnetic induction coil pairs simultaneously transmit different information data sub-packets.

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