Underground communication method and system of broadcast and key signal dual-purpose link

Abstract

The invention relates to the technical field of coal mining equipment, in particular to an underground communication method and system of a broadcast and key signal dual-purpose link, a storage medium and electronic equipment, the communication method comprises the following steps: a tail station regularly sends a carrier signal, and the carrier signal is sequentially transmitted to a master station by each slave station; the slave station monitors an associated key state, and if the key state changes, the carrier signal is processed according to the code of the slave station; and the master station receives and decodes the carrier signal, and obtains information of the slave station of which the key state is changed. According to the invention, a mode of simultaneously transmitting the voice frequency band and the orthogonal frequency division multiplexing signal is adopted, only one analog channel is used, voice and coded data information are simultaneously transmitted, and the utilization rate of the analog channel is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining equipment, and in particular to an underground communication method, system, storage medium and electronic equipment for a link used for both broadcast and key signals. Background Art

[0002] The mine audio broadcasting system is used for long-distance half-duplex audio shouting in the mine work area. It is usually configured on the coal mine three-machine centralized control system and arranged along the coal mine working face or tunnel. In order to pursue low latency, high reliability, and low power consumption, and adapt to the mine working environment, the above-mentioned mine audio broadcasting system preferably adopts traditional analog voice transmission technology. Specifically, the mine audio broadcasting system includes a master station and multiple slave stations. When in use, when a slave station sends voice, other slave stations can receive, amplify, and broadcast the voice through speakers to achieve the purpose of long-distance voice communication. At the same time, the master station monitors the status of each slave station in real time to ensure normal communication.

[0003] In addition, the master station and the slave station also have the function of reporting the emergency stop signal of the equipment, that is, the slave station needs to transmit the emergency stop information of the associated equipment to the control master station. The existing technical solution is to add an additional digital communication interface such as CAN bus in addition to the wired or wireless link used for audio broadcasting, or to add a separate emergency stop line, and use the method of monitoring the voltage drop of the emergency stop line to determine whether a certain emergency stop button is pressed, and obtain the ID information of the node currently in the emergency stop operation through data communication methods such as CAN bus.

[0004] Since additional lines and interfaces need to be set up outside the broadcast link to transmit the emergency stop button signal, the wiring of the equipment is highly complicated, which increases the difficulty for workers to configure the equipment and also increases the power consumption of the equipment. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to solve the problem that the existing mine audio broadcasting system needs to set up additional lines and interfaces outside the broadcasting link to transmit the emergency stop button signal, which makes the wiring of the equipment complicated, increases the difficulty for workers to configure the equipment, and increases the power consumption of the equipment.

[0006] In order to achieve the above objectives, the embodiments of the present disclosure adopt the following technical solutions:

[0007] According to one aspect of the present invention, a method for underground communication using a link for both broadcast and key signals is provided, which is applied to an underground communication system, wherein the underground communication system comprises a master station and a tail station, wherein a plurality of slave stations are connected in series between the master station and the tail station, and analog audio signals are transmitted between the slave stations and the master station.

[0008] The downhole communication method comprises the following steps:

[0009] The tail station periodically sends a carrier signal, wherein the carrier signal is transmitted from each slave station to the master station in turn; the slave station monitors the key state associated with the carrier signal, and if the key state changes, processes the carrier signal according to the encoding of the slave station; the master station receives the carrier signal sent by the slave station and decodes it to obtain information about the slave station whose key state has changed.

[0010] In some embodiments, the carrier signal includes a plurality of first single-frequency waves; the slave station processes the carrier signal according to the coding of the slave station, including: filtering the first single-frequency waves according to the coding of the slave station.

[0011] In some embodiments, wherein the frequencies of the first single-frequency waves in the carrier signal are not equal, the filtering processing of the first single-frequency waves by the slave station according to the encoding of the slave station includes: obtaining a binary code corresponding to the serial number of the slave station; and filtering or skipping the first single-frequency waves of the corresponding frequency order according to the value of each bit in the binary code.

[0012] In some embodiments, the carrier signal includes a second single-frequency wave, and the frequency of the second single-frequency wave is different from the first single-frequency wave; the method also includes: the master station monitors whether the link is normal according to the second single-frequency wave in the carrier signal.

[0013] In some embodiments, the carrier signal includes a third single-frequency wave, and the frequency of the third single-frequency wave is different from that of the first single-frequency wave; the method also includes: when the slave station starts to send the analog audio signal, the slave station filters the first single-frequency wave according to the encoding of the slave station, and filters the third single-frequency wave.

[0014] In some embodiments, the slave station filters the first single-frequency wave according to the coding of the slave station, including: determining whether the first single-frequency wave in the carrier signal is occupied; if occupied, sending the carrier signal and receiving the next carrier signal; if not occupied, filtering the first single-frequency wave in the carrier signal according to the coding of the slave station.

[0015] In some embodiments, the method further includes: the slave station monitors the key status associated with the carrier signal, and if the key status changes, sends a fourth single-frequency wave to the master station; the master station shuts down the associated device according to the fourth single-frequency wave.

[0016] According to another aspect of the present invention, there is provided an underground communication system for a link for both broadcasting and key signals, comprising a master station and a tail station, wherein a plurality of slave stations are connected in series between the master station and the tail station, and analog audio signals are transmitted between the slave stations and the master station. The underground communication system is used to implement the steps of the underground communication method for a link for both broadcasting and key signals.

[0017] According to another aspect of the present invention, there is provided a storage medium storing a computer program, which, when executed by a processor, implements the steps of underground communication of the above-mentioned broadcast and key signal combined link method.

[0018] According to another aspect of the present invention, there is provided an electronic device comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned underground communication method for the broadcast and key signal combined link when executing the computer program on the memory.

[0019] The disclosed embodiment realizes the transmission of broadcast and key signals between the slave station and the master station with only one link, reducing the cost and complexity of wiring and enhancing the reliability and maintainability of the system. It can transmit key information and accurately inform the master station of the slave station address where the key is pressed, ensuring the accuracy of the system's emergency stop response; it will not interfere with the propagation of analog audio signals, ensuring the audio quality. Through the mode of regular signal transmission by the tail station and detection and reception by the master station, the stability of the transmission of key industrial control signals such as emergency stop and locking along the line is enhanced, while effectively improving the accuracy and reliability of the overall link availability detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the structure of an underground communication system for a broadcast and key signal dual-use link according to an embodiment of the present disclosure;

[0022] Figure 2 A schematic diagram of the steps of the underground communication method for a broadcast and key signal dual-use link according to an embodiment of the present disclosure;

[0023] Figure 3 It is a schematic diagram of the module structure of the slave station according to an embodiment of the present disclosure;

[0024] Figure 4 Schematic diagram of the module structure of the master station according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0026] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0028] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0029] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0030] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0031] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0032] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0033] Embodiment 1

[0034] like Figure 1 As shown, the underground communication system includes a master station 1 and a tail station 2. A plurality of slave stations 31 to 3n are connected in series between the master station 1 and the tail station 2. Analog audio signals are transmitted between the slave stations 31 to 3n and the master station 1, thereby realizing the audio broadcasting function of the traditional mine audio broadcasting system.

[0035] Each slave station is provided with equipment buttons 41-4n for employees to press in an emergency, so as to control the emergency stop of the associated equipment through the master station 1 to prevent the spread of danger. The associated equipment is the three machines in the coal mine, namely, the scraper conveyor, the transfer machine and the crusher, which are three important engineering production equipment in the coal mine.

[0036] The embodiment of the present disclosure provides a downhole communication method for a broadcast and key signal dual link, which is applied to a downhole communication system to achieve the transmission of voice and key information between a slave station and a master station 1 only through a separate cable, such as Figure 2 As shown, the steps include:

[0037] S1: The tail station 2 sends a carrier signal periodically, and the carrier signal is transmitted from each slave station to the master station 1 in turn.

[0038] Furthermore, the tail station 2 periodically sends a carrier signal, which includes a plurality of mutually orthogonal single-frequency waves, among which the one used for mapping the slave station address information is referred to as the first single-frequency wave in the present disclosure.

[0039] The number of the first single-frequency waves needs to correspond to the number of the slave stations 31-3n. Preferably, the number of the first single-frequency waves is converted from the number of the slave stations into binary digits. For example, the number of slave stations is quantized to 31, and 31 is converted into a 5-digit binary digit 11111, so the number of the first single-frequency waves is 5, so that the 31 slave stations can map the binary code representing themselves to the first single-frequency wave. The specific mapping method is shown in step S2.

[0040] The frequencies of the first single frequency waves are different from each other, so that the master station 1 can correspond to the number of bits of the binary code by the frequency during decoding. Optionally, the first single frequency waves are arranged in sequence to form an increasing or decreasing arithmetic progression.

[0041] like Figure 1 As shown, each slave station is connected in sequence. This connection method is relatively simple and convenient for wiring. It can save the use of cables to a certain extent. Figure 1 The signal is transmitted station by station in the direction of the middle arrow to form an orderly communication path, that is, the carrier signal sent by the tail station 2 is transmitted to the last slave station 3n, and the slave station 3n processes the carrier signal and then transmits it to the previous station, and so on until it reaches the master station 1.

[0042] S2: The slave monitors the associated key status. If the key status changes, the carrier signal is processed according to the slave's code.

[0043] Specifically, when a key is pressed, the mechanical action can be converted into an electrical signal through the sensor, and the slave station can monitor the change of the key state based on the electrical signal.

[0044] Specifically, if the key state changes, processing the carrier signal according to the code of the slave station includes: filtering the first single frequency wave according to the code of the slave station. That is, obtaining the binary code corresponding to the serial number of the slave station, and filtering or skipping the first single frequency wave of the corresponding frequency order according to the value of each bit in the binary code.

[0045] For example, it is determined in turn whether the value of each bit in the binary code is 1. If it is 1, the first single-frequency wave of the corresponding frequency order is skipped; if it is not 1, the first single-frequency wave of the corresponding frequency order is filtered out or pulled down.

[0046] Furthermore, filtering the first single frequency wave according to the code of the slave station includes: the slave station determines whether the carrier signal is occupied, that is, determines whether the carrier signal is modified; if occupied, sends the carrier signal and receives the next carrier signal; if not occupied, filtering the first single frequency wave in the carrier signal according to the code of the slave station. In this way, interference between the slave stations can be avoided and the accuracy of information transmission can be ensured.

[0047] S3: Master station 1 receives and decodes the carrier signal to obtain the information of the slave station whose key status has changed.

[0048] Specifically, the master station 1 receives the carrier signal, determines that part of the first single frequency wave in the carrier signal is filtered out or pulled down, and can determine which slave station's key state has changed based on the mapping relationship of the binary code corresponding to the slave station. The master station 1 can stop the three coal mine machines based on the carrier signal and arrange personnel to inspect and repair the slave station.

[0049] In the above process, the frequency difference between the carrier signal and the analog audio signal in the mine is large, which will not affect the propagation of the analog audio signal. Therefore, it is possible to realize the transmission of broadcast and case signals using one link.

[0050] Furthermore, in order to improve the reliability of carrier signal transmission and the accuracy of the system, the carrier signal also includes a second single-frequency wave used for the master station 1 to monitor the link.

[0051] Specifically, the second single-frequency wave is used as a connection beacon. During the signal transmission process, the slave station does not process the connection beacon. The master station 1 monitors whether the link is normal according to the second single-frequency wave in the carrier signal.

[0052] For example, if the time interval of the carrier signal with the second single frequency wave received by the master station 1 is obviously inconsistent with the time interval of the second single frequency wave sent by the tail station 2, it can be determined that a problem occurs in the link.

[0053] To facilitate the judgment by the master station 1 , the frequency of the second single-frequency wave is different from that of the first single-frequency wave.

[0054] Furthermore, in order to facilitate the master station 1 to display and manage the audio transmission status of the slave station, the carrier signal also includes a third single-frequency wave for reporting the audio transmission status.

[0055] Specifically, the third single frequency wave is used as a voice beacon to report the situation of the slave station sending the analog audio signal to the master station 1. When the slave station starts to send the analog audio signal, the first single frequency wave is filtered according to the encoding of the slave station, and the third single frequency wave is filtered, so that the master station 1 can judge which slave station has sent the analog audio signal.

[0056] To facilitate the judgment by the master station 1 , the frequency of the third single-frequency wave is different from that of the first single-frequency wave.

[0057] Furthermore, when the slave detects that the associated key state has changed, the master 1 immediately sends the fourth single-frequency wave, and the master 1 shuts down the associated device according to the fourth single-frequency wave. In other words, after the slave detects that a key has been pressed, the master 1 can first shut down the device in time according to the fourth single-frequency wave, and then determine which slave's key state has changed according to the carrier signal.

[0058] In this way, since the main station 1 can control the equipment to stop urgently in time according to the fourth single-frequency wave, the control accuracy requirement for the carrier signal can be reduced accordingly, and the period of the carrier signal sent by the tail station 2 can be at the level of 500ms, which can not only improve the reliability of the system, but also improve the communication efficiency of the system, while reducing the communication cost.

[0059] For ease of understanding, the above steps are described below through specific embodiments, and Table 1 is provided to show the processing actions of the slave station on the voice beacon, the address beacon and the connection beacon:

[0060] For example, the underground communication system includes 31 slave stations, one tail station 2, and one master station 1. The tail station 2 sends a carrier signal every 500ms.

[0061] Among the carrier signals sent from the tail station 2, the frequencies of the five first single-frequency waves (address beacons) are 5.5khz, 6khz, 6.5khz, 7khz, and 7.5khz respectively, the frequency of the second single-frequency wave (connection beacon) is 8khz, and the frequency of the third single-frequency wave (voice beacon) is 5khz.

[0062] Among them, the binary code of slave station No. 26 is 11010.

[0063] After the 26th slave detects that the associated button is pressed, it immediately sends an 8khz single-wave signal and determines whether the received carrier signal is occupied, that is, whether any of the 5 first single-frequency waves is pulled down. If it is not, the first single-frequency waves of 6.5khz and 7.5khz in the carrier signal are filtered out. After receiving the 8khz single-wave signal, the master station 1 immediately stops the associated equipment. After that, it receives the carrier signal with 6.5khz and 7.5khz filtered out, and it can be known that the button associated with the 26th slave is pressed, and the next maintenance work can be arranged accordingly.

[0064] When the 26th slave station sends an analog audio signal, it determines whether the received carrier signal is occupied, that is, whether any of the 5 first single-frequency waves is pulled down. If it is not, the first single-frequency waves of 6.5khz and 7.5khz and the third single-frequency wave of 5khz in the carrier signal are filtered out. When the master station 1 receives the carrier signal with 5khz, 6.5khz and 7.5khz filtered out, it can be known that the 26th slave station sent the audio signal. The display device of the master station 1 can display the information of the 26th slave station for reference by the staff.

[0065] Table 1 List of processing actions of the slave station for voice beacon, address beacon and connection beacon

[0066]

[0067] In summary, the disclosed embodiments achieve the transmission of broadcast and key signals between the slave station and the master station with only one link, reducing wiring costs and complexity, and enhancing system reliability and maintainability. It can transmit key information and accurately inform the master station of the slave station address where the key is pressed, ensuring the accuracy of the system's emergency stop response; it will not interfere with the propagation of analog audio signals, ensuring audio quality. Through the mode of regular signal transmission by the tail station and detection and reception by the master station, the stability of key industrial control signal transmission such as emergency stop locking along the line is enhanced, while effectively improving the accuracy and reliability of overall link availability detection.

[0068] Embodiment 2

[0069] The embodiment of the present disclosure provides a downhole communication system with a link for both broadcast and key signals, such as Figure 1 As shown, the mine audio broadcasting system includes a master station 1 and a tail station 2. A plurality of slave stations 31 to 3n are connected in series between the master station 1 and the tail station 2. Analog audio signals are transmitted between the slave stations and the master station 1.

[0070] Each slave station is provided with equipment buttons 41-4n for employees to press in an emergency, so as to control the emergency stop of the associated equipment through the master station 1 to prevent the spread of danger. The associated equipment is the three machines in the coal mine, namely, the scraper conveyor, the transfer machine and the crusher, which are three important engineering production equipment in the coal mine.

[0071] The underground communication system uses cable conductors to transmit analog audio signals. This method has stable transmission and strong anti-interference ability, and can adapt to the production environment of the mine. During the signal transmission process, each slave station amplifies and balances the analog audio signal to compensate for the attenuation and distortion of the signal during the transmission process. However, the present disclosure does not limit the transmission method to wired transmission, and the method provided by the present disclosure can also be applied to wireless communication scenarios for transmitting analog signals.

[0072] Figure 3 Taking slave 21 as an example, the module structure of the slave is shown.

[0073] like Figure 3 As shown, the slave station includes a first signal transceiver module 201 , a first filter detector module 202 , a modulation module 203 , an address code storage 204 , a voice pickup module 205 , and an audio processing module 206 .

[0074] The first signal transceiver module 201 is used to receive and send a carrier signal, a fourth single frequency wave and an analog audio signal, so that these signals can be transmitted to the master station 1 .

[0075] The first filtering and detecting module 202 specifically includes a bandpass filter and a detector, and is used to detect whether the carrier frequency band is in use.

[0076] The modulation module 203 specifically includes a notch filter, which is used to modulate the first to fourth single-frequency waves.

[0077] The address code storage 204 stores the binary code of the slave station, and the modulation module can modulate the first single frequency wave according to the binary code.

[0078] The voice pickup module 205 is used to convert the sound signal into an analog signal.

[0079] The audio processing module 206 is used to optimize the analog signal, such as howling suppression, gain, equalization, etc.

[0080] Figure 4 The module structure of Master Station 1 is shown.

[0081] like Figure 4 As shown, the master station includes: a second signal transceiver module 101 , a second filter detection module 102 , and a processor 103 .

[0082] The second signal transceiver module 101 is used to receive a carrier signal, a fourth single frequency wave and an analog audio signal.

[0083] The second filtering and detection module 102 specifically includes a bandpass filter group and a detector, which is used to filter out noise and interference introduced into the channel.

[0084] The processor 103 is used for analyzing the carrier signal, the fourth single frequency wave and the analog audio signal.

[0085] The downhole communication system provided in this embodiment can implement the steps of the downhole communication method for the broadcast and key signal dual-use link provided in the first embodiment.

[0086] Embodiment 3

[0087] An embodiment of the present disclosure provides a storage medium storing a computer program. When the computer program is executed by a processor, the steps of underground communication of the broadcast and key signal combined link method provided in the first embodiment are implemented.

[0088] Embodiment 4

[0089] An embodiment of the present disclosure provides an electronic device, comprising at least a memory and a processor. The memory stores a computer program. When the processor executes the computer program on the memory, the processor implements the steps of the underground communication method for the broadcast and key signal dual-use link provided in the first embodiment.

[0090] The storage medium may be included in the electronic device, or may exist independently without being installed in the electronic device.

[0091] The storage medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains at least two Internet Protocol addresses; sends a node evaluation request including at least two Internet Protocol addresses to a node evaluation device, wherein the node evaluation device selects an Internet Protocol address from the at least two Internet Protocol addresses and returns it; receives the Internet Protocol address returned by the node evaluation device; wherein the obtained Internet Protocol address indicates an edge node in a content distribution network.

[0092] Alternatively, the storage medium carries one or more programs, and when the one or more programs are executed by the electronic device, the electronic device: receives a node evaluation request including at least two Internet Protocol addresses; selects an Internet Protocol address from the at least two Internet Protocol addresses; and returns the selected Internet Protocol address; wherein the received Internet Protocol address indicates an edge node in a content distribution network.

[0093] Computer program code for performing operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the passenger computer, partially on the passenger computer, as a separate software package, partially on the passenger computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the passenger computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0094] It should be noted that the storage medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium may also be any storage medium other than a computer readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0095] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0096] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0097] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0098] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0099] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0100] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0101] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0102] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. A method for underground communication using a link for both broadcast and key signals, characterized in that: Applied to an underground communication system, the underground communication system includes a master station and a tail station, a plurality of slave stations are connected in series between the master station and the tail station, and analog audio signals are transmitted between the slave stations and the master station. The downhole communication method comprises the following steps: The tail station periodically sends a carrier signal, wherein the carrier signal is transmitted from each slave station to the master station in sequence; The slave station monitors the key state associated with the carrier signal, and if the key state changes, processes the carrier signal according to the code of the slave station; The master station receives and decodes the carrier signal sent by the slave station, and obtains the information of the slave station whose key status has changed.

2. The communication method according to claim 1, characterized in that: in, The carrier signal includes a plurality of first single-frequency waves; The slave station processes the carrier signal according to the code of the slave station, including: filtering the first single-frequency wave according to the code of the slave station.

3. The communication method according to claim 2, characterized in that: in, The frequencies of the first single-frequency waves in the carrier signal are not equal. The slave station filtering the first single frequency wave according to the encoding of the slave station includes: Obtaining a binary code corresponding to the serial number of the slave station; According to the value of each bit in the binary code, the first single-frequency wave of the corresponding frequency order is filtered out or skipped.

4. The communication method according to claim 2, characterized in that: The carrier signal includes a second single-frequency wave, and the frequency of the second single-frequency wave is different from that of the first single-frequency wave; the method further includes: The master station monitors whether the link is normal according to the second single-frequency wave in the carrier signal.

5. The communication method according to claim 2, characterized in that: The carrier signal includes a third single-frequency wave, and the frequency of the third single-frequency wave is different from the frequency of the first single-frequency wave; the method further includes: When the slave station starts to send the analog audio signal, the slave station performs filtering processing on the first single-frequency wave according to the encoding of the slave station, and performs filtering processing on the third single-frequency wave.

6. The communication method according to claim 5, characterized in that: The slave station performs filtering processing on the first single frequency wave according to the encoding of the slave station, including: Determining whether the first single-frequency wave in the carrier signal is occupied; If occupied, sending the carrier signal and receiving the next carrier signal; If not occupied, the first single frequency wave in the carrier signal is filtered according to the coding of the slave station.

7. The communication method according to claim 1, characterized in that: The method further comprises: The slave station monitors the key state associated with the carrier signal, and sends a fourth single frequency wave to the master station if the key state changes; The master station shuts down the associated device according to the fourth single-frequency wave.

8. An underground communication system with a link for both broadcast and key signals, characterized in that: It includes a master station and a tail station. A plurality of slave stations are connected in series between the master station and the tail station. Analog audio signals are transmitted between the slave stations and the master station. The downhole communication system is used to implement the steps of the downhole communication method for a link used for both broadcast and key signals as described in any one of claims 1 to 7.

9. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the underground communication method for a link for both broadcast and key signals as described in any one of claims 1 to 7 are implemented.

10. An electronic device, comprising at least a memory and a processor, wherein a computer program is stored in the memory, wherein: When executing the computer program on the memory, the processor implements the steps of the underground communication method for a link for both broadcast and key signals as described in any one of claims 1 to 7.

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