High-voltage pulse through-the-earth communication machine

Abstract

The invention belongs to the technical field of communication, and relates to a high-voltage pulse through-the-earth communication machine. In high-voltage electric pulse signal through-the-earth communication with the ground as a transmission medium, aiming at the contradiction between the communication distance and the anti-interference capability, the invention provides a dynamic baseline topology switching method and a self-driven switching device, and the self-driven switching device comprises a communication host, a switching device, a transceiving cable, a transmitting cable, a receiving cable, a host electrode, a transmitting electrode and a receiving electrode. The communication machine is based on the high-voltage electric pulse signal conduction principle, signals are transmitted through ground media, the device is automatically switched to a long base line to improve the signal strength in the transmitting process, the device is automatically switched to a short base line to restrain environmental electromagnetic interference in the receiving process, and the contradiction between the communication distance and the anti-interference capacity in through-the-earth communication is ingeniously solved; and the switched control signal and energy are taken from the transmitted signal pulse, and an independent control line and a power supply are not needed. The device is compact, high in anti-interference performance, easy and convenient to use and particularly suitable for complex electromagnetic environments such as battlefields and the like.

Description

Technical Field

[0001] This invention belongs to the field of communication technology and relates to a high-voltage pulse ground-penetrating communication device. Background Technology (1) Technical Background

[0003] In battlefield conditions, high-voltage pulse signal transmission via the ground is a powerful way to circumvent interference and damage from electromagnetic waves in space, serving as a means of ensuring reliable communication on the battlefield. Currently, the industry uses high-voltage pulse communication technology to achieve this, utilizing the ground as the transmission medium. The equipment consists of a communication host, a baseline, host electrodes, and transceiver electrodes. The shielded housing of the communication host is connected to the host electrodes, which are then grounded. The baseline is the cable connecting the communication host and the transceiver electrodes, which are also grounded. The communication host transmits and receives signals through the baseline. This type of communication, using the ground as the transmission medium, typically employs a half-duplex communication mode, with the transmitting and receiving signals sharing the baseline in a time-division multiplexing manner.

[0004] (2) Problem Statement

[0005] In complex and harsh electromagnetic environments, between the two communicating parties, the communication distance is positively correlated with the transmitting capability of the transmitting end, and the transmitting capability of the transmitting end is positively correlated with the product of the transmitted signal strength and the length of the transmitting end's baseline. The communication distance is negatively correlated with the interference intensity at the receiving end, while the intensity of received interference at the receiving end is positively correlated with the length of the receiving end's baseline. In other words, a longer baseline is beneficial for increasing the ground-penetrating communication distance, but it introduces greater received interference.

[0006] This creates a contradiction between the communication range and anti-jamming capability of this type of ground-penetrating communication. This contradiction must be resolved in order to meet the battlefield requirements for long communication range and strong anti-jamming capability of this type of ground-penetrating communication. Summary of the Invention

[0007] The idea behind the invention is:

[0008] (1) Resolving the contradiction between communication distance and anti-interference capability

[0009] Without increasing the power of the transmitter, the way to increase the communication distance is to increase the length of the transmitter's baseline to enhance its transmission capability, while reducing the length of the receiver's baseline to reduce interference at the receiver.

[0010] Conventional high-voltage pulse communication technology, which uses the earth as the transmission medium, shares the same baseline for both transmission and reception, which leads to problems that contradict the above approach:

[0011] If the same baseline is a long baseline, then the transmission is a long baseline and the reception is also a long baseline. When the device is transmitting, the long baseline is beneficial to enhance the transmission capability, but when receiving, it increases the coupling interference of environmental electromagnetics.

[0012] If the same baseline is a short baseline, then the transmission is a short baseline and the reception is also a short baseline. When the device receives, although the short baseline is beneficial to reduce the coupling interference of environmental electromagnetics, it reduces the signal transmission capability during transmission.

[0013] To address this problem, this invention proposes a novel baseline topology: when the communication device transmits, the baseline topology exhibits a long baseline; when the communication device receives, the baseline topology exhibits a short baseline. In other words, the baseline no longer exhibits the same physical entity baseline during transmission and reception, but rather dynamically presents as long and short baselines.

[0014] To achieve this new baseline topology, the present invention innovates a switching device for switching the baseline topology state. When the communication host transmits a signal, the switching device switches the baseline topology to a long baseline, i.e., the transmitting baseline. When the communication host receives a signal, the switching device switches the baseline topology to a short baseline, i.e., the receiving baseline.

[0015] (2) Solve the battlefield adaptability problem of the switching device

[0016] Under battlefield conditions, a new problem will arise: when the communication host controls the switching device to switch, if the control line is led out from the communication host to the switching device, this control line will couple with environmental electromagnetic interference and input it to the communication host. In order to suppress this interference, the control line needs to be shielded, but this will significantly increase the weight, volume and deployment workload of the control line, which is not conducive to use in the battlefield environment.

[0017] To meet the requirements of the battlefield environment, the communication equipment must be interference-resistant, small in size, lightweight, easy to deploy, and easy to maintain. Therefore, the switching device must meet two requirements: it must not introduce additional electromagnetic interference to the communication host; and it must not use an independent control drive power supply.

[0018] The technical approach to meet the above new requirements is to remove this control line and instead use the transmission signal in the transceiver cable to control the switching of the switching device. The transmission signal is converted into the control signal of the switching device, and the energy of the transmission signal is converted into the driving energy required by the switching device. That is, the switching of the switching device is adaptive and self-driven.

[0019] The technical solution is:

[0020] This invention innovates a high-voltage pulse ground-penetrating communication device, including a communication host (1), a switching device (2), a transceiver cable (3), a transmitting cable (4), a receiving cable (5), host electrodes (6), transmitting electrodes (7), and receiving electrodes (8), as follows.Figure 1 As shown, the communication host (1) is connected to the host electrode (6) through its host shielding shell (100). The host electrode (6) is connected to the ground. The communication host (1) is connected to the switching device (2) through the transceiver cable (3). The switching device (2) is connected to the transmitting electrode (7) through the transmitting cable (4). The switching device (2) is connected to the receiving electrode (8) through the receiving cable (5). The transmitting electrode is connected to the ground. The receiving electrode (8) is connected to the ground. The communication host (1) outputs a high-voltage pulse signal through the transceiver cable (3).

[0021] The length of the transmitting cable (4) is greater than the length of the receiving cable (5).

[0022] The transceiver cable (3), transmitting cable (4), and receiving cable (5) are shielded cables suitable for transmitting high-voltage pulse signals.

[0023] The host shielding housing (100) of the communication host (1), the shielding layer of the transceiver cable (3), the switching shielding housing (200) of the switching device (2), the shielding layer of the transmitting cable (4), the shielding layer of the receiving cable (5), and the host electrode (6) are all connected.

[0024] At the connection between the transmitting cable (4) and the transmitting electrode (7), the core of the transmitting cable (4) is connected to the transmitting electrode (7), and the shielding layer of the transmitting cable (4) is suspended at this point.

[0025] At the connection between the receiving cable (5) and the receiving electrode (8), the core of the receiving cable (5) is connected to the receiving electrode (8), and the shielding layer of the receiving cable (5) is suspended at this point.

[0026] The communication host (1) has a half-duplex communication mode and its communication port is named host port (101). It is a connector that connects the communication host (1) and the transceiver cable (3). The transceiver is shared in time division. The host shielding shell (100) of the communication host (1) is connected to the host electrode (6).

[0027] The switching device (2) has a communication port named transceiver port (201), which is a connector connecting the switching device (2) and the transceiver cable (3);

[0028] The switching device (2) has a communication port named the transmission port (202), which is a connector connecting the switching device (2) and the transmission cable (4);

[0029] The switching device (2) has a communication port named receiving port (203), which is a connector connecting the switching device (2) and the receiving cable (5).

[0030] When using the equipment, unfold and straighten the transceiver cable (3) and the transmitting cable (4) so ​​that their axes are parallel. Unfold and straighten the receiving cable (5) so that its axis is parallel to the axis of the transmitting cable (4).

[0031] The communication host (1) outputs a high-voltage pulse train signal.

[0032] like Figure 7 As shown, when the communication host (1) receives a signal, the switching device (2) receives the transmitted signal from the transceiver cable (3), extracts and transforms it into a control signal for controlling the switching of the baseline topology. The energy in the control signal is the driving energy for controlling the switching of the baseline topology. The switching device (2) switches the baseline topology by itself. It does not require a control line from the communication host (1) and does not require an independent control power supply. It is self-driven.

[0033] The switching device (2) connects the transceiver cable (3) and the receiving cable (5), and the baseline topology is the receiving baseline; when the communication host (1) transmits a signal, the switching device (2) connects the transceiver cable (3) and the transmitting cable (4), and the baseline topology is the transmitting baseline.

[0034] like Figure 8 As shown, the transmitting baseline is formed by connecting the transmitting and receiving cables (3) and the transmitting cable (4), and the receiving baseline is formed by connecting the transmitting and receiving cables (3) and the receiving cable. Obviously, the length of the transmitting baseline is greater than the length of the receiving baseline. The transmitting baseline is a long baseline, and the receiving baseline is a short baseline.

[0035] The beneficial effects of this invention are:

[0036] Through-ground communication uses a long baseline for transmission and a short baseline for reception, cleverly resolving the contradiction between communication distance and anti-interference. It achieves baseline topology switching without control lines and without an independent drive power supply, making the equipment anti-interference, small in size, light in weight, and easy to use. It provides a method and device for high-voltage pulse through-ground communication, which is particularly suitable for battlefield environments. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the principle structure of a high-voltage pulse ground-penetrating communication device according to the present invention;

[0038] Figure 2 This is a schematic diagram of the composition structure of a switching device for a high-voltage pulse ground-penetrating communication device according to the present invention;

[0039] Figure 3 This is a schematic diagram of the signal flow of a switching device for a high-voltage pulse ground-penetrating communication device according to the present invention;

[0040] Figure 4 This is a schematic diagram of a switching device for a high-voltage pulse ground-penetrating communication device of the present invention switching to receiving mode;

[0041] Figure 5 This is a schematic diagram of a switching device for a high-voltage pulse ground-penetrating communication device of the present invention switching to the transmission state;

[0042] Figure 6 This is a schematic diagram illustrating the generation process of control signals for a switching device of a high-voltage pulse ground-penetrating communication device according to the present invention.

[0043] Figure 7 This is a topology diagram of a switching device for a high-voltage pulse ground-penetrating communication device according to the present invention, which switches to a short baseline.

[0044] Figure 8 This is a topology diagram of a switching device for a high-voltage pulse ground-penetrating communication device of the present invention, which switches to a long baseline.

[0045] Figure 9 This is a schematic diagram of the equipment layout for communication testing of a high-voltage pulse ground-penetrating communication device according to the present invention;

[0046] Figure 10 This is a schematic diagram of the modified equipment layout for communication testing of a high-voltage pulse ground-penetrating communication device according to the present invention.

[0047] Figure 11 This is a schematic diagram of the equipment layout for the control group's communication test.

[0048] Figure 1 In the Chinese: 1. Communication host; 2. Switching device; 3. Transceiver cable; 4. Transmitting cable; 5. Receiving cable; 6. Host electrode; 7. Transmitting electrode; 8. Receiving electrode; 100. Host shielded housing; 200. Switching shielded housing; 101. Host port; 201. Transceiver port; 202. Transmitting port; 203. Receiving port.

[0049] Figure 2 In the diagram: 200. Switching shielded housing; 21. Voltage divider network; 22. Peak protection circuit; 23. Detector circuit; 24. Filter network; 25. Voltage regulator circuit; 26. Transmit switch; 27. Receive switch; 201. Transmit / receive port; 202. Transmit port; 203. Receive port; 210. Housing connection point of voltage divider network; 220. Housing connection point of peak protection circuit; 230. Housing connection point of detector circuit.

[0050] Figure 3 In the middle section: 21. Voltage divider network; 22. Peak protection circuit; 23. Detector circuit; 24. Filter network; 25. Voltage regulator circuit; 26. Transmit switch; 27. Receive switch.

[0051] Figure 4 Components: 200. Switching shielded housing; 21. Voltage divider network; 22. Peak protection circuit; 23. Detector circuit; 24. Filter network; 25. Voltage regulator circuit; 26. Transmit switch; 27. Receive switch; 210. Housing connection point of voltage divider network; 220. Housing connection point of peak protection circuit; 230. Housing connection point of detector circuit; 201. Transmit / receive port; 202. Transmit port; 203. Receive port; 3. Transmit / receive cable; 4. Transmit cable; 5. Receive cable.

[0052] Figure 5 Components: 200. Switching shield housing; 21. Voltage divider network; 22. Peak protection circuit; 23. Detector circuit; 24. Filter network; 25. Voltage regulator circuit; 26. Transmit switch; 27. Receive switch; 210. Housing connection point of voltage divider network; 220. Housing connection point of peak protection circuit; 230. Housing connection point of detector circuit; 201. Transmit / receive port; 202. Transmit port; 203. Receive port; 3. Transmit / receive cable; 4. Transmit cable; 5. Receive cable.

[0053] Figure 6 In the diagram: 21. Voltage divider network; 22. Peak protection circuit; 23. Detector circuit; 24. Filter network; 25. Voltage regulator circuit; 211. Resistor; 212. Resistor; 210. Housing connection point of voltage divider network; 221. Bidirectional discharge diode; 220. Housing connection point of peak protection circuit; 231. Rectifier diode; 232. Rectifier diode; 233. Rectifier diode; 234. Rectifier diode; 235. Matching resistor; 230. Housing connection point of detector; 241. Inductor; 242. Inductor; 243. Inductor; 244. Capacitor; 245. Capacitor; 246. Capacitor; 251. Current limiting resistor; 252. Zener diode.

[0054] Figure 7 In the middle: 1. Communication host; 3. Transceiver cable; 5. Receiver cable; 6. Host electrode; 8. Receiver electrode; 100. Host shielding housing; 101. Host port.

[0055] Figure 8 In the middle: 1. Communication host; 3. Transceiver cable; 4. Transmitter cable; 6. Host electrode; 7. Transmitter electrode; 100. Host shielding housing; 101. Host port.

[0056] Figure 9 In the Chinese: 51. Communication unit A; 52. Communication unit B; 1. Communication host; 2. Switching device; 3. Transceiver cable; 4. Transmitting cable; 5. Receiving cable; 6. Host electrode; 7. Transmitting electrode; 8. Receiving electrode; 100. Host shielding housing; 200. Switching shielding housing.

[0057] Figure 10 In the Chinese: 51. Communication unit A; 52. Communication unit B; 1. Communication host; 2. Switching device; 3. Transceiver cable; 4. Transmitting cable; 5. Receiving cable; 6. Host electrode; 7. Transmitting electrode; 8. Receiving electrode; 100. Host shielding housing; 200. Switching shielding housing.

[0058] Figure 11 In the control group: 61. Communication device C; 62. Communication device D; 1. Communication host; 602. Transmit / receive baseline; 6. Host electrode; 606. Transmit / receive electrode. Detailed Implementation

[0059] To make the objectives, features, and advantages of the present invention more apparent and understandable, the following description refers to the accompanying drawings and specific examples.

[0060] To make the objectives, features, and advantages of the present invention more apparent and understandable, the present invention will be further described below with reference to the accompanying drawings and six specific embodiments, so that those skilled in the art can implement it based on the description.

[0061] It should be understood that the embodiments described below are only some embodiments of the present invention; the embodiments are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should also fall within the scope of protection of the present invention.

[0062] The main innovation of this invention is that a high-voltage pulse ground-penetrating communication device is invented, which dynamically switches the baseline topology with the special structure and switching mechanism of the switching device (2) so that it is a long baseline when transmitting and a short baseline when receiving; combined with the frame structure of the transmitted signal of the communication host (1), the switching device (2) is adaptive and self-driven in switching the baseline topology.

[0063] The high-voltage pulse defined in this invention refers to a pulse whose amplitude voltage has a lower limit of 100V.

[0064]

Example 1

[0065] The composition and structure of the switching device (2) of the present invention will be specifically described in this embodiment.

[0066] like Figure 2 The diagram shown is a schematic diagram of the composition of the switching device (2) of the present invention.

[0067] The switching device (2) includes a voltage divider network (21), a peak protection circuit (22), a detector circuit (23), a filter network (24), a voltage regulator circuit (25), a transmit switch (26), and a receive switch (27);

[0068] The switching device (2) has a switching shield housing (200);

[0069] The voltage divider network (21), peak protection circuit (22), and detector circuit (23) have grounding points in the switching shield housing (200) of the switching device (2), namely the housing connection point (210) of the voltage divider network, the housing connection point (220) of the peak protection circuit, and the housing connection point (230) of the detector circuit.

[0070] The aforementioned transmitting switch (26) is a high-voltage switch, which is normally open. Here, a high-voltage reed relay is preferred.

[0071] The receiving switch (27) is a high-voltage switch and is normally closed. Here, a high-voltage reed relay is preferred.

[0072] like Figure 3 The diagram shown illustrates the signal flow of the switching device, showing the process of generating control signals for the switching device.

[0073] The switching device (2) receives the transmission signal from the transceiver cable (3). The transmission signal is processed step by step through the voltage divider network (21), peak protection circuit (22), detector circuit (23), filter network (24), and voltage regulator circuit (25) to finally obtain the control signal that drives the transmission switch (26) and the receiving switch (27) to switch.

[0074] like Figure 6 As shown, the composition and function of each component in the switching device (2) are as follows:

[0075] The preferred circuit of the voltage divider network (21) consists of two resistors connected in series to perform voltage division. Resistor (211) has a large resistance value and resistor (212) has a small resistance value. According to the voltage division principle, the input high voltage pulse train is divided into a low voltage pulse train for output.

[0076] The peak protection circuit (22) is preferably composed of a parallel bidirectional discharge diode (221), which short-circuits the circuit when it encounters a spike interference signal, protecting the other circuits of the switching device (2) from damage by the spike interference signal.

[0077] The preferred circuit of the detector circuit (23) consists of four rectifier diodes and one matching resistor (235). The four rectifier diodes are rectifier diode (231), rectifier diode (232), rectifier diode (233), and rectifier diode (234), which form a full-bridge rectifier circuit to rectify the low-voltage pulse train. Regardless of the polarity of the low-voltage pulse, it is converted into a positive DC signal to complete the detection. The matching resistor (235) is connected in parallel in the output circuit to adjust the output impedance of the detector circuit (23).

[0078] The preferred circuit of the filter network (24) is a low-pass filter, which consists of three series inductors and three parallel capacitors, namely inductor (241), inductor (242), inductor (243), capacitor (244), capacitor (245), and capacitor (246), which removes high-frequency components and noise from the detected DC signal and obtains a stable DC component.

[0079] The preferred circuit of the voltage regulator circuit (25) consists of a current-limiting resistor (251) connected in series and a Zener diode (252) connected in parallel. It regulates the filtered DC signal to obtain a stable control voltage that is compatible with the control terminals of the transmitting switch (26) and the receiving switch (27).

[0080]

Example 2

[0081] The frame structure of the transmission signal of the communication host (1) of the present invention is specifically described in this embodiment.

[0082] The transmission signal of the communication host (1) is a high-voltage pulse train. The preferred frame structure here consists of two parts: the first part is the switching frame and the second part is the information frame. The switching frame is placed before the information frame.

[0083] The preferred switching frame here consists of consecutive 1 bits.

[0084]

Example 3

[0085] The preferred configuration of the switching delay and frame structure of the transmit switch (26) and receive switch (27) of the present invention is described in detail in this embodiment.

[0086] The configuration of the communication host (1) and the switching device (2) preferably ensures that:

[0087] The closing delay of the transmit switch (26) is less than the frame duration of the switching frame;

[0088] The on / off delay of the aforementioned transmit switch (26) is less than the frame duration of the information frame;

[0089] The closing delay of the receiving switch (27) is less than the frame duration of the switching frame;

[0090] The opening and closing delay of the receiving switch (27) is less than the frame duration of the information frame;

[0091] This configuration ensures that the transmit switch (26) can extract the signal and energy of the switching frame, obtain the control signal and the energy required to drive the transmit switch (26) and the receive switch (27) to perform the switching, and switch the transmit switch (26) and the receive switch (27) in advance before the information frame arrives, and maintain the switch state.

[0092] This configuration ensures that after the information frame arrives, the transmit switch (26) can extract the signal and energy of the information frame, obtain the control signal and the energy required to drive the transmit switch (26) and the receive switch (27) to perform the switching, and maintain the switch state before the information frame ends.

[0093] In other words, this configuration ensures that the switching device (2) is adaptive in switching the transmitted signal.

[0094]

Example 4

[0095] The preferred configuration of the transmitting switch (26) and receiving switch (27) of the present invention will be specifically described in this embodiment.

[0096] The switching device (2) is preferably configured as follows:

[0097] The closing delay of the transmitting switch (26) is equal to the opening delay of the receiving switch (27);

[0098] The opening delay of the transmitting switch (26) is equal to the closing delay of the receiving switch (27).

[0099] This ensures that the opening of the transmitting switch (26) and the closing of the receiving switch (27) occur simultaneously, that is:

[0100] The connection between the transceiver cable (3) and the transmitting cable (4), and the disconnection between the transceiver cable (3) and the receiving cable (5) occur simultaneously.

[0101] The disconnection of the transceiver cable (3) and the transmitting cable (4), and the connection of the transceiver cable (3) and the receiving cable (5) occur simultaneously.

[0102]

Example 5

[0103] This embodiment specifically describes one of the innovations of the present invention: a high-voltage pulse ground-penetrating communication device is invented. With the special structure and switching mechanism of the switching device (2), the baseline topology is dynamically switched so that it is a long baseline when transmitting and a short baseline when receiving. This innovation cleverly solves the contradiction between communication distance and anti-interference capability in ground-penetrating communication.

[0104] (1) Prepare the experimental equipment for this invention

[0105] like Figure 9 As shown, both sets of the equipment of the present invention are high-voltage pulse ground-penetrating communication machines. One set is named communication machine A (51), and the other set is named communication machine B (52). The two sets of equipment have the same structure, function, performance, parameters and configuration. They are used to conduct communication with the ground as the transmission medium on the ground 1000 meters apart horizontally. The transceiver cable (3), transmitting cable (4) and receiving cable (5) are preferably high-voltage semi-flexible coaxial cables. The transceiver cable (3) is 100 meters long, the transmitting cable (4) is 200 meters long, and the receiving cable (5) is 0.5 meters long. That is, the transmitting baseline is 300 meters long and the receiving baseline is 100.5 meters long. The transceiver cable (3) and the transmitting cable (4) are straightened and their axes are parallel. The axes of communication machine A (51) and communication machine B (52) are parallel to each other.

[0106] (2) Verify the switching baseline topology

[0107] The communication host (1) adopts a half-duplex communication mode, and its default working state is the receiving state.

[0108] When the communication host (1) is in the receiving state, the switching device (2) connects the transceiver cable (3) and the receiving cable (5) to form a receiving baseline, which is a short baseline and is 100.5 meters long.

[0109] When the communication host (1) transmits a signal from the transceiver cable (3), the switching device (2) connects the transceiver cable (3) with the transmitting cable (4) to form a transmission baseline that is 300 meters long.

[0110] When the communication host (1) finishes transmitting a signal from the transceiver cable (3), the switching device (2) can no longer obtain energy from the transceiver cable (3) to maintain the switching state of the transmitting switch (26) and the receiving switch (27). The transmitting switch (26) and the receiving switch (27) return to their previous state, the transceiver cable (3) and the receiving cable (5) are connected, and the baseline topology is restored to the receiving baseline, which is 100.5 meters long.

[0111] Therefore, during transmission, the baseline topology automatically switches to long baseline, and during reception, the baseline topology automatically switches to short baseline.

[0112] (3) Conduct communication tests of the present invention.

[0113] When the communication devices A (51) and B (52) are 1000 meters apart, actual tests show that:

[0114] When communication device A (51) transmits and B receives, the voltage signal-to-interference ratio received by communication device B (52) is 108.2.

[0115] When the communication device B (52) transmits and A receives, the voltage signal-to-interference ratio received by the communication device A (51) is 105.9.

[0116] (4) Prepare the equipment for the control group experiment

[0117] Based on the above experimental equipment, modifications were made as a control group experiment: the switching device (2), transmitting cable (4), receiving cable (5), transmitting electrode (7), and receiving electrode (8) were removed, and a new electrode identical to the transmitting electrode (7) was added, named the transceiver electrode (606). The length of the transceiver cable (3) was adjusted to 200 meters, and the core of the transceiver cable (3) was connected to the transceiver electrode. The control group equipment was named communication device C (61) and communication device D (62). The transceiver cables (3) of communication device A (51) and communication device B (52) were kept parallel to each other, and the transceiver electrode (606) was connected to the ground. Other conditions remained unchanged. That is: the baseline topology was changed to share the same fixed physical entity baseline for transmission and reception, named the transceiver baseline (606), and its length was 200 meters.

[0118] (5) Conduct communication tests in the control group experiment.

[0119] Actual tests show that when the communication device C (61) transmits and the communication device D (62) receives, the voltage signal-to-interference ratio (SIR), that is, the ratio of signal strength to interference strength, received by the communication device D (62) is 48.47.

[0120] When the communication device D(62) transmits and the communication device C(61) receives, the voltage signal-to-interference ratio received by the communication device C(61) is 48.73.

[0121] (6) Data Analysis

[0122] In complex electromagnetic environments such as battlefields and industries, environmental interference is far greater than the internal noise of communication receivers. The quality of communication is determined not by the signal-to-noise ratio of the receiving voltage, but by the signal-to-interference ratio of the receiving voltage.

[0123] Under the same communication distance and the same transmitted signal strength, the received voltage signal-to-interference ratio of the receiver of the present invention is significantly greater than that of the control group experiment.

[0124] That is, under the premise of the same communication distance, the communication quality of the experiment of the present invention is significantly better than that of the control experiment.

[0125] (7) Continue the communication test of the present invention by gradually moving to a distance.

[0126] Restore the test system to the device layout of this invention, such as Figure 10 As shown.

[0127] The communication device B (52) is gradually moved to a distance. Every 50 meters, it is stopped and a communication test is conducted on the communication device B (52) receiving the transmission from the communication device A (51). The signal-to-interference ratio of the receiving voltage of the communication device B (52) is observed.

[0128] It was found that for every 50 meters the device moved further away, the received voltage signal-to-interference ratio of the communication device B (52) would decrease compared to before.

[0129] Until the communication device B (52) was moved to a distance of 1400 meters from the communication device A (51), it was observed that the signal-to-interference ratio of the receiving voltage of the communication device B (52) was 48.76, which is consistent with... Figure 11 Compared to the control group communication device C(61) and communication device D(62) which are 1000 meters apart, the received voltage signal-to-interference ratio of communication device D(62) is basically equal at 48.47.

[0130] Communication devices B (52) and A (51) are kept stationary at a distance of 1400 meters. Communication device B (52) transmits and communication device A (51) receives. The received voltage signal-to-interference ratio of communication device A (51) is measured to be 48.92, which is consistent with... Figure 11 Compared with the control group communication device C(61) and communication device D(62) which are 1000 meters apart, the received voltage signal-to-interference ratio of communication device C(61) is 48.73, which is basically the same.

[0131] (8) Data Analysis

[0132] In complex electromagnetic environments such as battlefields and industries, environmental interference is far greater than the internal noise of communication receivers. The quality of communication is determined not by the signal-to-noise ratio of the receiving voltage, but by the signal-to-interference ratio of the receiving voltage.

[0133] Actual measurements show that, under the same received voltage signal-to-interference ratio, the communication distance of the present invention is 1.4 times that of the control group.

[0134] That is, under the premise of equal communication quality, the communication distance of the present invention is 1.4 times that of the control group, and the communication distance of the present invention is significantly greater than that of the control group.

[0135] (9) Experimental Conclusion

[0136] This invention switches the baseline topology to a long baseline during transmission and a short baseline during reception, thus cleverly resolving the contradiction between communication distance and anti-interference capability in through-ground communication.

[0137]

Example 6

[0138] The second innovation of the present invention is specifically described in this embodiment. A high-voltage pulse ground-penetrating communication device is invented. The frame structure of the transmitted signal of the communication host (1) is combined with the circuit mechanism of the switching device (2) to extract and transform control signals and energy, which drive the switching device (2) to switch the baseline topology. This switching is adaptive and self-driven, which meets the requirement that the switching of the baseline topology under battlefield conditions must be adaptive and self-driven.

[0139] (1) Prepare the experimental equipment for this invention

[0140] The device of this invention is a high-voltage pulse ground-penetrating communication device, named communication device A (51). The transceiver cable (3), transmitting cable (4) and receiving cable (5) are preferably high-voltage semi-flexible coaxial cables. The transceiver cable (3) is 100 meters long, the transmitting cable (4) is 200 meters long, and the receiving cable (5) is 0.5 meters long. That is, the transmitting baseline is 300 meters long and the receiving baseline is 100.5 meters long. The transceiver cable (3) and the transmitting cable (4) are straightened and their axes are parallel.

[0141] The transmitting switch (26) and receiving switch (27) in the switching device (2) are preferably high-voltage reed relays;

[0142] The transmitting switch (26) in the switching device (2) is preferably designed to have a closing delay and an opening delay that are both less than the frame duration of the switching frame and also less than the frame duration of the information frame.

[0143] The transmitting switch (26) and receiving switch (27) in the switching device (2) are preferably:

[0144] The closing delay of the transmitting switch (26) is equal to the opening delay of the receiving switch (27) in milliseconds;

[0145] The opening delay of the transmitting switch (26) is equal to the closing delay of the receiving switch (27) in milliseconds.

[0146] (2) Frame structure of transmitted signal

[0147] The high-voltage pulse train is divided into two parts: the first part is the switching frame and the second part is the information frame. The switching frame comes before the information frame.

[0148] The transmitted signal is a high-voltage pulse train signal, and the preferred pulse parameters are as follows:

[0149] The pulse voltage amplitude is 300V and the pulse duty cycle is 50%. The presence or absence of the pulse is used to encode information. The presence of a pulse represents bit 1 and the absence of a pulse represents bit 0, thus generating a binary information bit stream composed of 0 and 1.

[0150] The pulse period, pulse width, duty cycle, pulse amplitude, and pulse polarity of the switching frame and the information frame are the same. The pulse period is less than 50 microseconds, the frame duration of the switching frame is 4 milliseconds, and the frame duration of the information frame is 10 milliseconds.

[0151] Obviously, there are:

[0152] The closing delay of the transmitting switch (26) = the opening delay of the receiving switch (27) < the frame duration of the switching frame;

[0153] The closing delay of the transmitting switch (26) = the opening delay of the receiving switch (27) < the frame duration of the information frame;

[0154] The opening delay of the transmitting switch (26) = the closing delay of the receiving switch (27) < the frame duration of the switching frame;

[0155] The opening delay of the transmitting switch (26) = the closing delay of the receiving switch (27) < the frame duration of the information frame.

[0156] (3) Baseline topology switching process

[0157] When the communication signal is received, the switching device (2) cannot obtain the control signal and driving energy for controlling the baseline topology switching from the transceiver cable (3). The transmitting switch (26) is automatically in the normally open position and the receiving switch (27) is automatically in the normally closed position. The baseline topology is maintained at the receiving baseline, which is a short baseline.

[0158] The communication host (1) transmits a signal; the transmitted signal is received by the switching device (2), and the switching frame arrives first;

[0159] The switching device (2) extracts and transforms the switching frame in the transmitted signal to obtain the control signal and driving energy used to perform the switching of the transmit switch (26) and the receive switch (27), and performs the switching. The baseline topology is pre-switched to the transmit baseline before the information frame arrives, which is a long baseline.

[0160] The frame duration of the switching frame is greater than the closing delay of the transmitting switch (26) and also greater than the opening delay of the receiving switch (27). The states of the transmitting switch (26) and the receiving switch (27) are maintained, and the baseline topology is maintained in the long baseline state, waiting for the arrival of the information frame.

[0161] After the information frame arrives, the frame duration of the switching frame is greater than the opening delay of the transmitting switch (26) and also greater than the closing delay of the receiving switch (27). The states of the transmitting switch (26) and the receiving switch (27) are maintained. Therefore, the baseline topology is maintained in the long baseline state. The communication host (1) continues to send information frames to communicate and waits for the information frame to end.

[0162] After the information frame ends, the switching device (2) can no longer obtain control signals and energy from the transceiver cable (3) to maintain the state of the transmit switch (26) and the receive switch (27). The transmit switch (26) automatically turns off and the receive switch (27) automatically closes. The baseline topology is restored to the receiving baseline, which is a short baseline.

[0163] (4) Switching the baseline topology does not require a separate control line.

[0164] The switching of the baseline topology is based on the real-time processing of the transmitted signal, without a separate control line. In this way, environmental electromagnetic interference will not couple into the communication host (1) through the control line, which is particularly suitable for the harsh electromagnetic environment of the battlefield.

[0165] (5) Switching of baseline topology does not require a separate power supply.

[0166] The switching of baseline topology is based on the utilization of the energy of the transmitted signal and does not require an independent driving power supply. Thus, the switching device (2) is small in size, light in weight, quick to deploy, and simple to maintain, making it suitable for harsh battlefield environments.

Claims

1. A high-voltage pulse ground-penetrating communication device, characterized in that: It includes a communication host (1), a switching device (2), a transceiver cable (3), a transmitting cable (4), a receiving cable (5), a host electrode (6), a transmitting electrode (7), and a receiving electrode (8); The communication host (1) has a host shielding housing (100); The communication host (1) is connected to the host electrode (6) through the host shielding shell (100), and the host electrode (6) is connected to the ground. The communication host (1) is connected to the switching device (2) through the transceiver cable (3), the switching device (2) is connected to the transmitting cable (4), the transmitting cable (4) is connected to the transmitting electrode (7), and the transmitting electrode (7) is connected to the ground. The switching device (2) is connected to the receiving cable (5), the receiving cable (5) is connected to the receiving electrode (8), and the receiving electrode (8) is connected to the ground. The length of the transmitting cable (4) is greater than the length of the receiving cable (5); The transceiver cable (3), transmitting cable (4), and receiving cable (5) are shielded cables suitable for transmitting high-voltage pulse signals; The host shielding housing (100), the shielding layer of the transceiver cable (3), the switching shielding housing (200) of the switching device, the shielding layer of the transmitting cable (4), the shielding layer of the receiving cable (5), and the host electrode (6) of the communication host are all connected. At the connection between the transmitting cable (4) and the transmitting electrode (7), the core of the transmitting cable (4) is connected to the transmitting electrode (7), and the shielding layer of the transmitting cable (4) is suspended at this point; At the connection between the receiving cable (5) and the receiving electrode (8), the core of the receiving cable (5) is connected to the receiving electrode (8). The communication host (1) described herein has a communication mode of half-duplex communication; The communication host (1) outputs a high-voltage pulse train signal, and the lower limit of the pulse amplitude voltage of the high-voltage pulse train is 100V. When the communication host (1) receives a signal, the switching device (2) automatically connects the transceiver cable (3) and the receiving cable (5), and at the same time, automatically disconnects the transceiver cable (3) from the transmitting cable (4), and the baseline topology is the receiving baseline. When the communication host (1) transmits a signal, the switching device (2) automatically connects the transceiver cable (3) and the transmitting cable (4) and automatically disconnects the transceiver cable (3) from the receiving cable (5), and the baseline topology is the transmitting baseline; When the communication host (1) receives a signal, the baseline topology is a short baseline; when the communication host (1) transmits a signal, the baseline topology is a long baseline. The control signal and driving energy required for the switching are both derived from the transmitted signal itself; The switching device (2) does not have a control line from the communication host (1) for switching the baseline topology; The switching device (2) does not have an independent control drive power supply from the communication host (1) for switching the baseline topology.

2. The high-voltage pulse ground-penetrating communication device as described in claim 1, characterized in that: The switching device (2) is characterized in that it includes a voltage divider network (U21), a peak protection circuit (U22), a detector circuit (U23), a filter network (U24), a voltage regulator circuit (U25), a transmitting switch (U26), and a receiving switch (U27). The transmitted signal is processed step by step through the voltage divider network (U21), peak protection circuit (U22), detector circuit (U23), filter network (U24), and voltage regulator circuit (U25) to finally obtain the control signal that drives the switching of the transmit switch (U26) and receive switch (U27). The voltage divider network (U21) is characterized in that it divides the input high-voltage pulse train into a low-voltage pulse train and outputs it to the peak protection circuit (U22). The peak protection circuit (U22) is characterized in that it suppresses possible spike interference signals in the input signal and then outputs them to the detection circuit (U23) to protect the other components of the switching device (2) from damage by the spike interference signals. The detection circuit (U23) is characterized in that it detects the input signal, converts it into a positive DC signal, and outputs it to the filter network (U24). The filtering network (U24) is characterized in that it is a low-pass filter that removes high-frequency components and noise from the DC signal output by the detector circuit (U23) to obtain a stable DC component, which is then output to the voltage regulator circuit (U25). The voltage regulator circuit (U25) is characterized in that it regulates the DC signal output by the filter network (U24) to obtain a stable control voltage that is compatible with the control terminals of the transmitting switch (U26) and the receiving switch (U27).

3. A high-voltage pulse ground-penetrating communication device as described in claim 2, characterized in that: The switching device (2) is characterized in that the transmitting switch (U26) and the receiving switch (U27) are high-voltage switches.

4. A high-voltage pulse ground-penetrating communication device as described in claim 3, characterized in that: The switching device (2) is characterized in that the transmitting switch (U26) and the receiving switch (U27) are high-voltage reed relays.

5. A high-voltage pulse ground-penetrating communication device as described in claim 4, 3, or 2, characterized in that: The communication host (1) is characterized in that the frame structure of the high voltage pulse train it transmits consists of two parts: the first part is a switching frame and the second part is an information frame. The switching frame is placed before the information frame. The switching device (2) receives, extracts, and transforms the switching frame into a control signal and driving energy, and controls the switching device (2) to switch the switching states of the transmitting switch (U26) and the receiving switch (U27) in advance before receiving the information frame.

6. A high-voltage pulse ground-penetrating communication device as described in claim 5, characterized in that: The communication host (1) is characterized in that the switching frame of the high-voltage pulse train it transmits is composed of consecutive bits 1.

7. A high-voltage pulse ground-penetrating communication device as described in claim 6 or 5, characterized in that: The switching device (2) is characterized in that the configuration of the transmit switch (U26), the receive switch (U27), the switching frame, and the information frame is as follows: The closing delay of the transmit switch (U26) is less than the frame duration of the switching frame; The on / off delay of the transmit switch (U26) is less than the frame duration of the information frame; The closing delay of the receive switch (U27) is less than the frame duration of the switching frame; The on / off delay of the receive switch (U27) is less than the frame duration of the information frame.

8. A high-voltage pulse ground-penetrating communication device as described in claim 7, 6, 5, or 2, characterized in that: The switching device (2) is characterized in that the transmitting switch (U26) and the receiving switch (U27) are configured as follows: The closing delay of the transmitting switch (U26) equals the opening delay of the receiving switch (U27); The opening delay of the transmitting switch (U26) equals the closing delay of the receiving switch (U27).

9. A high-voltage pulse ground-penetrating communication device as described in claim 1, characterized in that: The aforementioned transceiver cable (3) is a high-voltage semi-flexible coaxial cable.

10. A high-voltage pulse ground-penetrating communication device as described in claim 9, characterized in that: The transceiver cable (3) and the receiver cable (5) are high-voltage semi-flexible coaxial cables.

11. A high-voltage pulse ground-penetrating communication device as described in claim 10, characterized in that: The transceiver cable (3), transmitting cable (4), and receiving cable (5) are high-voltage semi-flexible coaxial cables.

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