Electromagnetic wave while-drilling multi-path two-way transmission system, method, device and equipment and medium

Abstract

The invention relates to an electromagnetic wave while-drilling multipath two-way transmission system, method, device, equipment and medium, the system comprises an underground transceiver system, a ground transceiver system, underground measuring equipment and a PC, the underground transceiver system comprises an underground transceiver and an underground antenna, and the ground transceiver system comprises a ground transceiver and a ground antenna; the underground transceiver comprises a first digital signal processing module, and the first digital signal processing module comprises a first sending processing module and a first receiving processing module; the ground transceiver comprises a second digital signal processing module, and the second digital signal processing module comprises a second sending processing module and a second receiving processing module. According to the underground transceiving system and the ground transceiving system, the electromagnetic wave channels are multiplexed in a time division mode, and the influence of conflicts and interference in the data transmission process is reduced. Source coding processing, convolutional coding processing and code element repeated processing are carried out on initial data, so that wireless electromagnetic waves can be transmitted while drilling more efficiently, stably and reliably.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic wave transmission while drilling, and in particular to an electromagnetic wave multi-channel bidirectional transmission while drilling system, method, device, equipment and medium. Background Art

[0002] Wireless measurement while drilling (MWD) technology plays a vital role in the exploration and development of mineral resources such as oil and natural gas. It can monitor drilling parameters and geological information in real time during drilling operations, providing key data support for drilling decisions. Traditional wireless measurement while drilling systems mainly rely on mud pulses and electromagnetic waves for data transmission. Among them, wireless electromagnetic wave transmission while drilling technology is favored by the industry because it does not require mud as a signal carrier, has lower requirements for drilling fluid and mud pumps, and has a faster data transmission rate.

[0003] However, under extremely complex geological conditions, traditional radio electromagnetic wave transmission while drilling technology faces many challenges. Due to the differences in electrical characteristics of formations in various regions, radio electromagnetic wave signals will be interfered by formation noise, well site noise, and receiver circuit system noise during transmission. These noises will seriously affect the reception quality of useful signals at the receiving end, resulting in a decrease in signal-to-noise ratio and an increase in bit error rate. Especially in extreme environments such as deep wells, ultra-deep wells, high temperature and high pressure, these problems are particularly prominent, seriously affecting the accuracy and reliability of data transmission of radio electromagnetic wave while drilling systems, resulting in the accuracy and reliability of data transmission being difficult to meet actual needs. Therefore, there is an urgent need for a more efficient, stable and reliable technical solution for radio electromagnetic wave transmission while drilling to meet the needs of drilling operations under complex geological conditions. Summary of the invention

[0004] In order to enable wireless electromagnetic waves to be transmitted while drilling more efficiently, stably and reliably, the present application provides an electromagnetic wave multi-channel bidirectional transmission while drilling system, method, device, equipment and medium.

[0005] In a first aspect, the present application provides an electromagnetic wave multi-channel bidirectional transmission system while drilling, including a downhole transceiver system, a ground transceiver system, a downhole measurement device and a PC, wherein the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna;

[0006] The downhole transceiver includes a first digital signal processing module, which includes a first sending processing module and a first receiving processing module; the surface transceiver includes a second digital signal processing module, which includes a second sending processing module and a second receiving processing module;

[0007] The first sending processing module is used to receive the first initial data sent by the downhole measurement equipment under the first condition corresponding to the current time period, perform source coding processing, convolution coding processing and symbol repetition processing on the first initial data, and send the processed data to the second receiving processing module based on the downhole antenna and the ground antenna; the second receiving processing module is used to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module under the first condition corresponding to the current time period, and send the processed data to the PC, the first condition is to turn on the sending function of the downhole transceiver system, turn off the receiving function of the downhole transceiver system, turn off the sending function of the ground transceiver system and turn on the receiving function of the ground transceiver system;

[0008] The second sending processing module is used to receive the second initial data sent by the PC under the second condition corresponding to the current time period, perform source coding processing, convolution coding processing and codeword repetition processing on the second initial data, and send the processed data to the first receiving processing module based on the ground antenna and the downhole antenna; the first receiving processing module is used to perform codeword decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module under the second condition corresponding to the current time period, and send the processed data to the downhole measurement equipment, and the second condition is to turn off the sending function of the downhole transceiver system, turn on the receiving function of the downhole transceiver system, turn on the sending function of the ground transceiver system and turn off the receiving function of the ground transceiver system.

[0009] The beneficial effects of the present application are as follows: the underground transceiver system and the ground transceiver system time-division multiplex the electromagnetic wave channel, reducing the impact of conflicts and interference during data transmission. The data exchange sending end performs source coding, convolution coding and symbol repetition processing on the initial data, and the data exchange receiving end performs symbol decoding, convolution decoding and source decoding processing on the received data, so that the wireless electromagnetic waves can be more efficiently, stably and reliably transmitted while drilling.

[0010] Further, the first sending processing module includes a first information source coding submodule, a first convolution coding submodule, a first frame generation submodule, a first symbol repetition submodule and a first digital modulation submodule, and the first receiving processing module includes a first bandpass filtering submodule, a first extraction filtering submodule, a first frame synchronization submodule, a first symbol decoding submodule, a first convolution decoding submodule and a first information source decoding submodule;

[0011] The first information source coding submodule, the first convolution coding submodule, the first frame generation submodule, the first symbol repetition submodule, the first digital modulation submodule, the first bandpass filtering submodule, the first decimation filtering submodule, the first frame synchronization submodule, the first symbol decoding submodule, the first convolution decoding submodule and the first information source decoding submodule each include a plurality of processing channels;

[0012] For each processing channel in the first source coding submodule, it is used to perform source coding processing on the first initial data to obtain a first source bit stream; for each processing channel in the first convolution coding submodule, it is used to perform convolution coding processing on the first source bit stream to obtain a first convolution code bit stream; for each processing channel in the first frame generation submodule, it is used to generate a first frame bit stream based on the first convolution code bit stream; for each processing channel in the first symbol repetition submodule, it is used to perform symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream; for each processing channel in the first digital modulation submodule, it is used to perform digital modulation on the downhole transmission bit stream to generate a first modulated data stream;

[0013] The downhole transceiver is further used to generate a first phase-shifted modulation signal of a first power based on the plurality of the first modulation data streams, and send the first phase-shifted modulation signal to the second receiving and processing module;

[0014] The second sending processing module includes a second information source coding submodule, a second convolution coding submodule, a second frame generation submodule, a second symbol repetition submodule, and a second digital modulation submodule, and the second receiving processing module includes a second bandpass filtering submodule, a second extraction filtering submodule, a second frame synchronization submodule, a second symbol decoding submodule, a second convolution decoding submodule, and a second information source decoding submodule;

[0015] The second information source encoding submodule, the second convolution encoding submodule, the second frame generation submodule, the second symbol repetition submodule, the second digital modulation submodule, the second bandpass filtering submodule, the second decimation filtering submodule, the second frame synchronization submodule, the second symbol decoding submodule, the second convolution decoding submodule and the second information source decoding submodule each include a plurality of processing channels;

[0016] The ground transceiver is further used to convert the first phase-shift modulated signal into a first digital signal;

[0017] For each processing channel in the second bandpass filtering submodule, it is used to perform digital filtering calculation on the first digital signal to obtain a first digital modulation signal; for each processing channel in the second extraction filtering submodule, it is used to perform filtering processing on the first digital modulation signal to obtain a first sampled data stream; for each processing channel in the second frame synchronization submodule, it is used to obtain a first symbol demodulation data stream based on the first sampled data stream, and perform data frame synchronization based on the first symbol demodulation data stream; for each processing channel in the second symbol decoding submodule, it is used to perform symbol decoding processing on the first symbol demodulation data stream after data frame synchronization; for each processing channel in the second convolution decoding submodule, it is used to perform convolution decoding processing on the data after symbol decoding processing to obtain the first source bit stream; for each processing channel in the second source decoding submodule, it is used to perform source decoding processing on the first source bit stream to obtain the first initial data, and send the first initial data to the PC;

[0018] For each processing channel in the second source coding submodule, it is used to perform source coding processing on the second initial data to obtain a second source bit stream; for each processing channel in the second convolution coding submodule, it is used to perform convolution coding processing on the second source bit stream to obtain a second convolution code bit stream; for each processing channel in the second frame generation submodule, it is used to generate a second frame bit stream based on the second convolution code bit stream; for each processing channel in the second symbol repetition submodule, it is used to perform symbol repetition processing on the second frame bit stream to obtain a terrestrial transmission bit stream; for each processing channel in the second digital modulation submodule, it is used to perform digital modulation on the terrestrial transmission bit stream to generate a second modulated data stream;

[0019] The ground transceiver is further used to generate a second phase-shifted modulation signal of a second power based on the plurality of the second modulated data streams, and send the second phase-shifted modulation signal to the first receiving processing module;

[0020] The downhole transceiver is further used to convert the second phase-shift modulated signal into a second digital signal;

[0021] For each processing channel in the first bandpass filtering submodule, it is used to perform digital filtering calculation on the second digital signal to obtain a second digital modulation signal; for each processing channel in the first extraction filtering submodule, it is used to perform filtering processing on the second digital modulation signal to obtain a second sampled data stream; for each processing channel in the first frame synchronization submodule, it is used to obtain a second codeword demodulation data stream based on the second sampled data stream, and perform data frame synchronization based on the second codeword demodulation data stream; for each processing channel in the first codeword decoding submodule, it is used to perform codeword decoding processing on the second codeword demodulation data stream after data frame synchronization; for each processing channel in the first convolution decoding submodule, it is used to perform convolution decoding processing on the data after codeword decoding processing to obtain the second source bit stream; for each processing channel in the first source decoding submodule, it is used to perform source decoding processing on the second source bit stream to obtain the second initial data, and send the second initial data to the downhole measurement equipment.

[0022] The beneficial effects of adopting the above further scheme are: adopting multi-frequency simultaneous transmission and reception to realize the simultaneous reception and transmission of multi-frequency signals, thereby improving the utilization rate of the channel. By adopting the extraction filter corresponding to the extraction filter submodule, the carrier data stream of each channel can be reduced to a low-speed data stream of k times the code element frequency, thereby improving the reliability of the carrier signal.

[0023] Further, the first transmission processing module further includes a first multiplexer submodule and a first transmission control submodule, the downhole transceiver further includes a first analog circuit module, the second transmission processing module further includes a second multiplexer submodule and a second transmission control submodule, and the surface transceiver further includes a second analog circuit module;

[0024] The first multi-channel synthesis submodule is used to add the first modulated data streams to generate a first transmission waveform control data stream; the first transmission control submodule is used to control the first analog circuit module to generate the first phase shift modulation signal of the first power based on the first transmission waveform control data stream;

[0025] The second multi-channel synthesis submodule is used to add each second modulated data stream to generate a second transmission waveform control data stream; the second transmission control submodule is used to control the second analog circuit module to generate the second phase-shifted modulation signal of the second power based on the second transmission waveform control data stream.

[0026] The beneficial effect of adopting the above further scheme is that through the first multi-channel synthesis sub-module and the second multi-channel synthesis sub-module, multiple modulated data streams can be added to generate a transmission waveform control data stream, which helps to transmit more information within a limited bandwidth, thereby improving communication efficiency.

[0027] Further, the downhole transceiver further comprises a third analog circuit module, the first analog circuit module comprises a first digital switch power supply submodule and a first feedback protection submodule, the third analog circuit module comprises a plurality of first amplification submodules, a plurality of first hardware filtering submodules and a plurality of first analog-to-digital conversion submodules;

[0028] The ground transceiver further includes a fourth analog circuit module, the second analog circuit module includes a second digital switch power supply submodule and a second feedback protection submodule, and the fourth analog circuit module includes a plurality of second amplification modules, a plurality of second hardware filtering modules and a plurality of second analog-to-digital conversion modules;

[0029] The first transmission control submodule is used to control the data flow based on the first transmission waveform, adjust the first output voltage of the first digital switch power submodule, and generate the first phase-shifted modulation signal of the first power based on the adjusted first output voltage; the first feedback protection submodule is used to detect the first operating parameter of the first digital switch power submodule, and feed back the first operating parameter to the first transmission control submodule, so that the first transmission control submodule adjusts the first output voltage based on the first operating parameter;

[0030] For each of the second amplifying modules, the second amplifying module is used to amplify the first phase-shift modulated signal; for each of the second hardware filtering modules, the second hardware filtering module is used to perform hardware filtering on the amplified first phase-shift modulated signal; for each of the second analog-to-digital conversion modules, the second analog-to-digital conversion module is used to convert the first phase-shift modulated signal after the hardware filtering into the first digital signal;

[0031] The second transmission control submodule is used to control the data flow based on the second transmission waveform, adjust the second output voltage of the second digital switch power submodule, and generate the second phase-shifted modulation signal of the second power based on the adjusted second output voltage; the second feedback protection submodule is used to detect the second operating parameter of the second digital switch power submodule, and feed back the second operating parameter to the second transmission control submodule, so that the second transmission control submodule adjusts the second output voltage based on the second operating parameter;

[0032] For each of the first amplifying submodules, the first amplifying submodule is used to amplify the second phase-shift modulated signal; for each of the first hardware filtering submodules, the first hardware filtering submodule is used to perform hardware filtering on the second phase-shift modulated signal after the amplification; for each of the first analog-to-digital conversion submodules, the first analog-to-digital conversion submodule is used to convert the second phase-shift modulated signal after the hardware filtering into the second digital signal.

[0033] The beneficial effects of adopting the above further scheme are: by using a digital switching power supply as the power amplifier for underground transmission, the power loss during underground transmission is reduced, and the temperature rise of the underground transceiver is reduced. By adopting multi-channel amplification, filtering, analog-to-digital conversion and then adding at the receiving end, the random noise introduced by the transceiver during amplification, filtering, and analog-to-digital conversion is reduced, the anti-interference ability of information transmission is improved, and the reliability of information transmission is increased.

[0034] In a second aspect, the present application provides a method for multi-channel bidirectional transmission of electromagnetic waves while drilling, comprising:

[0035] Based on a preset target correspondence, the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period are obtained, wherein the target correspondence is a correspondence between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module;

[0036] In the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, the first sending processing module is controlled to receive the first initial data sent by the downhole measurement equipment, and the first initial data is respectively subjected to source coding processing, convolution coding processing, and symbol repetition processing, and the processed data is sent to the second receiving processing module based on the downhole antenna and the ground antenna; and the second receiving processing module is controlled to perform symbol decoding processing, convolution decoding processing, and source decoding processing on the data sent by the first sending processing module, and send the processed data to the PC;

[0037] In the current time period, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on, and the receiving function of the ground transceiver system is turned off, the second sending processing module is controlled to receive the second initial data sent by the PC, and the second initial data is subjected to source coding, convolution coding and symbol repetition processing, and the processed data is sent to the first receiving processing module based on the ground antenna and the downhole antenna; and the first receiving processing module is controlled to perform symbol decoding, convolution decoding and source decoding on the data sent by the second sending processing module, and the processed data is sent to the downhole measurement equipment.

[0038] In a third aspect, the present application provides an electromagnetic wave multi-channel bidirectional transmission device while drilling, comprising:

[0039] An acquisition module is used to acquire the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period based on a preset target correspondence relationship, wherein the target correspondence relationship is a correspondence relationship between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module;

[0040] A first control module is used for, in the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, then controlling the first sending processing module to receive the first initial data sent by the downhole measurement equipment, performing source coding processing, convolution coding processing and symbol repetition processing on the first initial data, and sending the processed data to the second receiving processing module based on the downhole antenna and the ground antenna; and controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module, and sending the processed data to the PC;

[0041] The second control module is used for, in the current time period, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on, and the receiving function of the ground transceiver system is turned off, then controlling the second sending processing module to receive the second initial data sent by the PC, performing source coding processing, convolution coding processing and symbol repetition processing on the second initial data, and sending the processed data to the first receiving processing module based on the ground antenna and the downhole antenna; and controlling the first receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module, and sending the processed data to the downhole measurement equipment.

[0042] In a fourth aspect, the present application provides an electronic device, comprising a processor and a memory, wherein the processor is coupled to the memory;

[0043] The processor is used to execute the computer program stored in the memory so that the electronic device performs the method as described in any one of the second aspects.

[0044] In a fifth aspect, the present application provides a computer-readable storage medium, comprising a computer program or instructions, which, when executed on a computer, enables the computer to execute the method as described in any one of the second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a connection diagram of the electromagnetic wave while drilling multi-channel bidirectional transmission system according to an embodiment of the present application;

[0046] Figure 2 This is a schematic diagram of the structure of the downhole transceiver system of the embodiment of the present application;

[0047] Figure 3 This is a time-sharing diagram of the receiving and sending functions of an embodiment of the present application;

[0048] Figure 4 This is a structural block diagram of the downhole transceiver system of the embodiment of the present application;

[0049] Figure 5 This is a structural block diagram of the ground transceiver system of an embodiment of the present application;

[0050] Figure 6 A schematic diagram showing the calculation of codeword demodulation in an embodiment of the present application;

[0051] Figure 7 This is a structural block diagram of an electronic device according to an embodiment of the present application.

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 1. Downhole transceiver system; 11. Adapter; 12. Downhole antenna; 13. Pipe threading; 14. Downhole transceiver; 15. Drill collar; 2. Ground transceiver system; 3. PC; 4. Drilling rig; 5. Drill pipe. DETAILED DESCRIPTION

[0054] The present application is further described in detail below in conjunction with the accompanying drawings.

[0055] like Figure 1 and Figure 2 As shown, an embodiment of the present application also provides an electromagnetic wave multi-channel bidirectional transmission system while drilling, including a downhole transceiver system 1, a ground transceiver system 2, downhole measurement equipment and a PC 3, wherein the downhole transceiver system 1 includes a downhole transceiver 14 and a downhole antenna 12, and the ground transceiver system 2 includes a ground transceiver and a ground antenna.

[0056] The downhole transceiver 14 includes a first digital signal processing module, which includes a first sending processing module and a first receiving processing module; the surface transceiver includes a second digital signal processing module, which includes a second sending processing module and a second receiving processing module.

[0057] The first sending processing module is used to receive the first initial data sent by the downhole measurement equipment under the first condition corresponding to the current time period, perform source coding processing, convolution coding processing and codeword repetition processing on the first initial data, and send the processed data to the second receiving processing module based on the downhole antenna 12 and the ground antenna; the second receiving processing module is used to perform codeword decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module under the first condition corresponding to the current time period, and send the processed data to the PC 3, and the first condition is to turn on the sending function of the downhole transceiver system, turn off the receiving function of the downhole transceiver system, turn off the sending function of the ground transceiver system and turn on the receiving function of the ground transceiver system.

[0058] The second sending processing module is used to receive the second initial data sent by the PC 3 under the second condition corresponding to the current time period, perform source coding processing, convolution coding processing and codeword repetition processing on the second initial data, and send the processed data to the first receiving processing module based on the ground antenna and the downhole antenna 12; the first receiving processing module is used to perform codeword decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module under the second condition corresponding to the current time period, and send the processed data to the downhole measuring equipment, and the second condition is to turn off the sending function of the downhole transceiver system, turn on the receiving function of the downhole transceiver system, turn on the sending function of the ground transceiver system and turn off the receiving function of the ground transceiver system.

[0059] In this embodiment, the downhole measurement equipment can be used to measure initial parameters such as drilling fluid performance and formation characteristics. Drilling parameters are used to reflect the basic status of drilling operations, and drilling parameters may include parameters such as drilling depth, drill pipe 5 rotation speed, and drilling fluid flow rate; geological parameters are formation characteristic data used for formation evaluation and oil and gas resource prediction, and geological parameters may include parameters such as formation resistivity and natural gamma ray intensity.

[0060] PC 3 is a personal computer. In the wireless measurement while drilling system, PC 3 can be used as a data processing center to receive data from the downhole transceiver system 1, which is crucial for decision-making and formation evaluation of drilling operations. PC 3 can also monitor the drilling process in real time, display the change trend of drilling parameters and the distribution of formation characteristics. At the same time, the operator can also send instructions to the downhole equipment through PC 3, that is, the second initial data, which can be used to adjust drilling parameters or perform other operations.

[0061] The electromagnetic wave multi-channel bidirectional transmission system while drilling also includes a drilling rig 4 and a drill pipe 5. The grounding metal rod and the electrode metal rod of the ground transceiver system 2 are deeply buried underground at a position far away from the drilling rig 4. The distance between the grounding metal rod and the electrode metal rod is far. Port 1 of the ground transceiver can be connected to the drilling rig 4 with an insulated cable, port 2 of the ground transceiver can be connected to the grounding metal rod with an insulated cable, port 3 of the ground receiver can be connected to the electrode metal rod with an insulated cable, and port 4 of the ground transceiver can be connected to the PC 3.

[0062] The downhole transceiver system 1 also includes a drill collar 15, a penetrating electrode line and an adapter 11. One end of the drill collar 15 is connected to the drill pipe 5, and the other end of the drill collar 15 is connected to the downhole antenna 12. The other end of the downhole antenna 12 is connected to the adapter 11. The downhole transceiver 14 is installed in the groove on the side wall of the drill collar 15, and the groove can be closed with a cover plate. The first electrode line of the downhole transceiver 14 can be connected to the drill collar 15, and the second wire can be connected to the adapter 11 through the penetrating electrode line.

[0063] The downhole transceiver system 1 and the ground transceiver system 2 have transceiver functions respectively, and the ground antenna is communicatively connected with the downhole antenna 12. When the downhole transceiver system 1 is used as the sending end of the interactive data and the ground transceiver system 2 is used as the receiving end of the interactive data, the first initial data can be processed by the first sending processing module, and the processed data can be transmitted to the ground transceiver system 2 through the downhole antenna 12 and the ground antenna; when the downhole transceiver system 1 is used as the receiving end of the interactive data and the ground transceiver system 2 is used as the sending end of the interactive data, the second initial data can be processed by the second sending processing module, and the processed data can be transmitted to the downhole transceiver system 1 through the ground antenna and the downhole antenna 12.

[0064] like Figure 3 As shown, the transceiver functions of the underground transceiver system 1 and the ground transceiver system 2 can be switched in different time periods, that is, there is a target corresponding relationship between the switching states of the transceiver functions of the underground transceiver system 1 and the ground transceiver system 2. For example, when the current time period is T1, the underground transceiver system 1 serves as the sending end of data interaction and the ground transceiver system 2 serves as the receiving end of data interaction; when the current time period is T2, the underground transceiver system 1 serves as the receiving end of data interaction and the ground transceiver system 2 serves as the sending end of data interaction; when the current time period is T3, the underground transceiver system 1 serves as the sending end of data interaction and the ground transceiver system 2 serves as the receiving end of data interaction; when the current time period is T4, the underground transceiver system 1 serves as the receiving end of data interaction and the ground transceiver system 2 serves as the sending end of data interaction.

[0065] The underground transceiver system 1 and the ground transceiver system 2 time-share multiplex the electromagnetic wave channel, and are responsible for data transmission and reception respectively in divided time periods, reducing the impact of conflicts and interference during data transmission, thereby improving the efficiency of data transmission and reducing electromagnetic interference between the underground transceiver system 1 and the ground transceiver system 2.

[0066] In this embodiment, the transmitting end of data interaction performs source coding, convolution coding and symbol repetition processing on the initial data, and the receiving end of data interaction performs symbol decoding, convolution decoding and source decoding processing on the received data.

[0067] Source coding processing is to intercept the maximum valid bit of each data that needs to be sent, send the valid bit, and do not send the invalid bit, thereby improving the effectiveness of communication; through convolution coding processing, the errors of data interaction can be controlled, with a certain error correction capability, improving the anti-interference ability of data transmission, and increasing the reliability of data transmission; through symbol repetition processing, each symbol is repeatedly transmitted the same number of times, and the digital signal of the repeated symbol is superimposed at the receiving end, reducing the random interference of the channel introduced during the data transmission process, improving the anti-interference ability of data transmission, and increasing the reliability of data transmission; thus, wireless electromagnetic waves can be transmitted more efficiently, stably and reliably while drilling.

[0068] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the first sending processing module includes a first information source coding submodule, a first convolution coding submodule, a first frame generation submodule, a first symbol repetition submodule and a first digital modulation submodule, and the first receiving processing module includes a first bandpass filtering submodule, a first extraction filtering submodule, a first frame synchronization submodule, a first symbol decoding submodule, a first convolution decoding submodule and a first information source decoding submodule;

[0069] The first information source coding submodule, the first convolution coding submodule, the first frame generation submodule, the first symbol repetition submodule, the first digital modulation submodule, the first bandpass filtering submodule, the first decimation filtering submodule, the first frame synchronization submodule, the first symbol decoding submodule, the first convolution decoding submodule and the first information source decoding submodule each include a plurality of processing channels;

[0070] For each processing channel in the first source coding submodule, it is used to perform source coding processing on the first initial data to obtain a first source bit stream; for each processing channel in the first convolution coding submodule, it is used to perform convolution coding processing on the first source bit stream to obtain a first convolution code bit stream; for each processing channel in the first frame generation submodule, it is used to generate a first frame bit stream based on the first convolution code bit stream; for each processing channel in the first symbol repetition submodule, it is used to perform symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream; for each processing channel in the first digital modulation submodule, it is used to digitally modulate the downhole transmission bit stream to generate a first modulated data stream; the downhole transceiver 14 is also used to generate a first phase-shifted modulation signal of a first power based on multiple first modulated data streams, and send the first phase-shifted modulation signal to the second receiving processing module;

[0071] The second sending processing module includes a second information source coding submodule, a second convolution coding submodule, a second frame generation submodule, a second symbol repetition submodule, and a second digital modulation submodule, and the second receiving processing module includes a second bandpass filtering submodule, a second extraction filtering submodule, a second frame synchronization submodule, a second symbol decoding submodule, a second convolution decoding submodule, and a second information source decoding submodule;

[0072] The second information source encoding submodule, the second convolution encoding submodule, the second frame generation submodule, the second symbol repetition submodule, the second digital modulation submodule, the second bandpass filtering submodule, the second decimation filtering submodule, the second frame synchronization submodule, the second symbol decoding submodule, the second convolution decoding submodule and the second information source decoding submodule each include a plurality of processing channels;

[0073] The ground transceiver is also used to convert the first phase-shifted modulation signal into a first digital signal; for each processing channel in the second bandpass filtering submodule, it is used to perform digital filtering calculation on the first digital signal to obtain a first digital modulation signal; for each processing channel in the second extraction filtering submodule, it is used to filter the first digital modulation signal to obtain a first sampled data stream; for each processing channel in the second frame synchronization submodule, it is used to obtain a first symbol demodulation data stream based on the first sampled data stream, and perform data frame synchronization based on the first symbol demodulation data stream; for each processing channel in the second symbol decoding submodule, it is used to perform symbol decoding processing on the first symbol demodulation data stream after data frame synchronization; for each processing channel in the second convolution decoding submodule, it is used to perform convolution decoding processing on the data after symbol decoding processing to obtain the first source bit stream; for each processing channel in the second source decoding submodule, it is used to perform source decoding processing on the first source bit stream to obtain the first initial data, and send the first initial data to the PC 3;

[0074] For each processing channel in the second source coding submodule, it is used to perform source coding processing on the second initial data to obtain a second source bit stream; for each processing channel in the second convolution coding submodule, it is used to perform convolution coding processing on the second source bit stream to obtain a second convolution code bit stream; for each processing channel in the second frame generation submodule, it is used to generate a second frame bit stream based on the second convolution code bit stream; for each processing channel in the second symbol repetition submodule, it is used to perform symbol repetition processing on the second frame bit stream to obtain a ground transmission bit stream; for each processing channel in the second digital modulation submodule, it is used to digitally modulate the ground transmission bit stream to generate a second modulated data stream; the ground transceiver is also used to generate a second phase-shifted modulation signal of a second power based on multiple second modulated data streams, and send the second phase-shifted modulation signal to the first receiving processing module;

[0075] The downhole transceiver 14 is also used to convert the second phase-shifted modulation signal into a second digital signal; for each processing channel in the first bandpass filtering submodule, it is used to perform digital filtering calculation on the second digital signal to obtain a second digital modulation signal; for each processing channel in the first extraction filtering submodule, it is used to filter the second digital modulation signal to obtain a second sampled data stream; for each processing channel in the first frame synchronization submodule, it is used to obtain a second symbol demodulation data stream based on the second sampled data stream, and perform data frame synchronization based on the second symbol demodulation data stream; for each processing channel in the first symbol decoding submodule, it is used to perform symbol decoding processing on the second symbol demodulation data stream after data frame synchronization; for each processing channel in the first convolution decoding submodule, it is used to perform convolution decoding processing on the data after symbol decoding processing to obtain the second source bit stream; for each processing channel in the first source decoding submodule, it is used to perform source decoding processing on the second source bit stream to obtain the second initial data, and send the second initial data to the downhole measurement equipment.

[0076] like Figures 4 to 6 As shown, in the current time period, if it is necessary to turn on the sending function of the underground transceiver system 1 and turn off the receiving function of the underground transceiver system 1, and it is necessary to turn off the sending function of the ground transceiver system 2 and turn on the receiving function of the ground transceiver system 2, the data transmission process includes:

[0077] The first sending processing module also includes a first sending interface, which is communicatively connected to the downhole measuring device and is used to receive the first initial data sent by the downhole measuring device;

[0078] The first information source coding submodule may include a plurality of processing channels UDL1 to UDLn, the first initial data is distributed to the plurality of processing channels in the first information source coding submodule, for each processing channel in the first information source coding submodule, a CRC check code is added to the first initial data corresponding to the processing channel, a data frame content may be generated, and the maximum valid bit of the data frame content corresponding to the processing channel is intercepted to generate a first information source bit stream;

[0079] The first convolutional coding submodule may include a plurality of processing channels UDL1 to UDLn, each first information source bit stream enters a processing channel of the first convolutional coding submodule corresponding to the first information source bit stream, and for each processing channel in the first convolutional coding submodule, convolutional coding is performed on the first information source bit stream corresponding to the processing channel to generate a first convolutional code bit stream;

[0080] The first frame generation submodule may include a plurality of processing channels UDL1 to UDLn, each first convolutional code bit stream enters a corresponding processing channel of the first frame generation submodule, and for each processing channel in the first frame generation submodule, a 13-bit binary Barker code 0b1111100110101 for frame synchronization is added to the front of the first convolutional code bit stream corresponding to the processing channel to generate a first frame bit stream;

[0081] The first symbol repeating submodule may include a plurality of processing channels UDL1 to UDLn, each first frame bit stream enters a processing channel of the first symbol repeating submodule corresponding to the first frame bit stream, and for each processing channel in the first symbol repeating submodule, each symbol of the first frame bit stream corresponding to the processing channel is continuously repeated the same number of times to generate a downhole transmission bit stream;

[0082] The first digital modulation submodule may include multiple processing channels UDL1 to UDLn, and each downhole transmission bit stream enters the processing channel of the first digital modulation submodule corresponding to each processing channel. For each processing channel in the first digital modulation submodule, the first transmission bit stream corresponding to the processing channel is digitally modulated according to the BPSK modulation mode to generate a first modulated data stream carrying bit stream information. The downhole transceiver 14 generates a first phase-shifted modulation signal of a first power according to the multiple first modulated data streams, and the first phase-shifted modulation signal can be a BPSK signal with increased power;

[0083] The second bandpass filter submodule may include multiple processing channels Uf1 to Ufn, and the first digital signal is connected to each processing channel of the second bandpass filter submodule for digital filtering calculation, so that the first digital modulation signals of multiple channels Uf1 to Ufn can be separated from the multiplexed digital signal;

[0084] The second extraction and filtering submodule may include a plurality of processing channels Uf1 to Ufn, each of which enters a corresponding processing channel of the second extraction and filtering submodule, and for each processing channel in the second extraction and filtering submodule, the first digital modulation signal corresponding to the processing channel is filtered to obtain a first sampling data stream at a rate k times that of the BPSK signal corresponding to the processing channel;

[0085] The second frame synchronization submodule may include multiple processing channels UDL1 to UDLn, and each first sampled data stream enters the processing channel of the second frame synchronization submodule corresponding to the first sampled data stream. For each processing channel in the second frame synchronization submodule, the first sampled data streams separated by k data bits are added to obtain a first symbol demodulated data stream with k times the BPSK signal frequency. Based on a preset correlation calculation formula, a continuous Pearson correlation calculation is performed on the first symbol demodulated data stream and a pre-stored digital modulation signal YH. In this embodiment, YH is a Barker code frame header BPSK digital modulation signal with a length of 13k. The maximum value of the k correlation coefficients after the Pearson correlation coefficient is greater than the set threshold is obtained. The maximum value is the frame synchronization point, which is also the starting position of the first symbol.

[0086] The correlation calculation formula can be expressed as:

[0087]

[0088] Among them, r represents the Pearson correlation coefficient, X i represents the i-th sample value (or the value after some preprocessing) in the received signal sequence, Y i Represents the i-th value in the known Barker code frame header BPSK modulated signal.

[0089] The second symbol decoding submodule may include multiple processing channels UDL1~UDLn. The first symbol demodulated data stream after each data frame synchronization enters the processing channel of the second symbol decoding submodule corresponding to each other. For each processing channel in the second symbol decoding submodule, based on the preset correlation calculation formula, the continuous k first symbol demodulated data in the first symbol demodulated data stream are respectively subjected to Pearson correlation coefficient calculation with the pre-stored digital modulation signals Y0 and Y1 to obtain correlation coefficients r0 and r1. If r0 is greater than r1, the received symbol is 0, otherwise the received symbol is 1, and the symbol decoding process is completed. In this embodiment, Y0 is a BPSK digital modulation signal whose length is symbol 0 of length k, and Y1 is a BPSK digital modulation signal whose length is symbol 1 of length k;

[0090] The second convolutional decoding submodule may include a plurality of processing channels UDL1 to UDLn, and the data after each symbol decoding process enters the processing channel of the second convolutional decoding submodule corresponding to each other. When any processing channel in the second convolutional decoding submodule receives a frame of symbols, it performs convolutional decoding calculation to obtain the first source bit stream;

[0091] The second information source decoding submodule may include multiple processing channels UDL1 to UDLn, and each first information source bit stream enters the processing channel of the second information source decoding submodule corresponding to each other. For each processing channel in the second information source decoding submodule, the first initial data is restored according to the agreed data interception rule. In this embodiment, the second receiving processing module also includes a second receiving interface, and the second receiving interface is connected to the PC 3 for communication. The first initial data can be sent to the PC 3 through the second receiving interface.

[0092] like Figures 4 to 6 As shown, in the current time period, if it is necessary to turn on the sending function of the ground transceiver system 2 and turn off the receiving function of the ground transceiver system 2, and it is necessary to turn off the sending function of the underground transceiver system 1 and turn on the receiving function of the underground transceiver system 1, the data transmission process includes:

[0093] The second sending processing module also includes a second sending interface, which is connected to the PC 3 for communication and is used to receive the second initial data sent by the PC 3;

[0094] The second information source coding submodule may include a plurality of processing channels DDL1 to DDLn, and the second initial data is distributed to the plurality of processing channels in the second information source coding submodule. For each processing channel in the second information source coding submodule, a CRC check code is added to the second initial data corresponding to the processing channel to generate data frame content, and the maximum valid bit of the data frame content corresponding to the processing channel is intercepted to generate a second information source bit stream;

[0095] The second convolutional coding submodule may include a plurality of processing channels DDL1 to DDLn, each second information source bit stream enters a processing channel of the second convolutional coding submodule corresponding to the second information source bit stream, and for each processing channel in the second convolutional coding submodule, convolutional coding is performed on the second information source bit stream corresponding to the processing channel to generate a second convolutional code bit stream;

[0096] The second frame generation submodule may include a plurality of processing channels DDL1 to DDLn, each second convolutional code bit stream enters a corresponding processing channel of the second frame generation submodule, and for each processing channel in the second frame generation submodule, a 13-bit binary Barker code 0b1111100110101 for frame synchronization is added to the front of the second convolutional code bit stream corresponding to the processing channel to generate a second frame bit stream;

[0097] The second symbol repetition submodule may include a plurality of processing channels DDL1 to DDLn, each second frame bit stream enters a processing channel of the second symbol repetition submodule corresponding to the second frame bit stream, and for each processing channel in the second symbol repetition submodule, each symbol of the second frame bit stream corresponding to the processing channel is continuously repeated the same number of times to generate a ground transmission bit stream;

[0098] The second digital modulation submodule may include multiple processing channels DDL1 to DDLn, and each downhole transmission bit stream enters the corresponding processing channel of the second digital modulation submodule. For each processing channel in the second digital modulation submodule, the second transmission bit stream corresponding to the processing channel is digitally modulated according to the BPSK modulation mode to generate a second modulated data stream carrying bit stream information. The ground transceiver generates a second phase-shifted modulation signal of a second power according to the multiple second modulated data streams, and the second phase-shifted modulation signal can be a BPSK signal with increased power;

[0099] The first bandpass filter submodule may include multiple processing channels Df1 to Dfn, and the second digital signal is connected to each processing channel of the second bandpass filter submodule for digital filtering calculation, so that the multiple second digital modulation signals Df1 to Dfn can be separated from the multiplexed digital signal;

[0100] The first extraction and filtering submodule may include a plurality of processing channels Df1 to Dfn, each second digital modulation signal enters a processing channel of the first extraction and filtering submodule corresponding to the respective processing channel, and for each processing channel in the first extraction and filtering submodule, the second digital modulation signal corresponding to the processing channel is filtered to obtain a second sampling data stream at a rate k times that of the BPSK signal corresponding to the processing channel;

[0101] The first frame synchronization submodule may include multiple processing channels DDL1 to DDLn, and each second sampled data stream enters the processing channel of the first frame synchronization submodule corresponding to the second sampled data stream. For each processing channel in the first frame synchronization submodule, the second sampled data streams separated by k data bits are added to obtain a second symbol demodulated data stream with k times the BPSK signal frequency. Based on a preset correlation calculation formula, continuous Pearson correlation calculation is performed on the second symbol demodulated data stream and the pre-stored digital modulation signal YH to obtain a maximum value of k correlation coefficients after the Pearson correlation coefficient is greater than a set threshold. The maximum value is the frame synchronization point, which is also the starting position of the first symbol.

[0102] The first symbol decoding submodule may include multiple processing channels DDL1 to DDLn. The second symbol demodulation data stream after each data frame synchronization enters the processing channel of the first symbol decoding submodule corresponding to each other. For each processing channel in the first symbol decoding submodule, based on a preset correlation calculation formula, the continuous k second symbol demodulation data in the second symbol demodulation data stream are respectively calculated with the pre-stored digital modulation signals Y0 and Y1 for Pearson correlation coefficients to obtain correlation coefficients r0 and r1. If r0 is greater than r1, the received symbol is 0, otherwise the received symbol is 1, and the symbol decoding process is completed;

[0103] The first convolutional decoding submodule may include a plurality of processing channels DDL1 to DDLn, and the data after each symbol decoding process enters the processing channel of the first convolutional decoding submodule corresponding to each other. When any processing channel in the first convolutional decoding submodule receives a frame of symbols, it performs convolutional decoding calculation to obtain a second source bit stream;

[0104] The first information source decoding submodule may include multiple processing channels DDL1 to DDLn, and each second information source bit stream enters the processing channel of the first information source decoding submodule corresponding to each other. For each processing channel in the first information source decoding submodule, the second initial data is restored according to the agreed data interception rule. In this embodiment, the first receiving processing module also includes a first receiving interface, and the first receiving interface is connected to the downhole measurement equipment in communication. The second initial data can be sent to the downhole measurement equipment through the first receiving interface.

[0105] In this embodiment, the electromagnetic wave multi-channel bidirectional transmission system while drilling adopts multi-frequency simultaneous transmission and reception to realize the simultaneous reception and transmission of multi-frequency signals, thereby improving the flexibility and efficiency of communication and the utilization rate of channels. By adopting CRC check in the data transmission process, it is possible to effectively detect whether an error has occurred in the data transmission process. By adopting Barker code as the frame synchronization header, the accuracy of frame synchronization detection is improved. By adopting the digital bandpass filter corresponding to the bandpass filter submodule to filter out the signal outside the channel, the carrier digital signal of each channel can be separated. By adopting the extraction filter corresponding to the extraction filter submodule, the carrier data stream of each channel can be slowed down to a low-speed data stream of k times the code element frequency, thereby improving the reliability of the carrier signal. By adopting the maximum Pearson correlation coefficient method to calculate the frame synchronization and code element information, the optimal code element synchronization data position can be adjusted.

[0106] In this embodiment, the first transmission processing module further includes a first multiplexer submodule and a first transmission control submodule, the downhole transceiver 14 further includes a first analog circuit module, the second transmission processing module further includes a second multiplexer submodule and a second transmission control submodule, and the surface transceiver further includes a second analog circuit module;

[0107] The first multi-channel synthesis submodule is used to add the first modulated data streams to generate a first transmission waveform control data stream; the first transmission control submodule is used to control the first analog circuit module to generate the first phase shift modulation signal of the first power based on the first transmission waveform control data stream;

[0108] The second multi-channel synthesis submodule is used to add each second modulated data stream to generate a second transmission waveform control data stream; the second transmission control submodule is used to control the second analog circuit module to generate the second phase-shifted modulation signal of the second power based on the second transmission waveform control data stream.

[0109] Through the first multi-channel synthesis submodule and the second multi-channel synthesis submodule, multiple modulated data streams can be added to generate a transmission waveform control data stream, which helps to transmit more information within a limited bandwidth, thereby improving communication efficiency. The first transmission control submodule and the second transmission control submodule control the analog circuit module to generate a phase-shifted modulation signal based on the transmission waveform control data stream, thereby providing better anti-interference ability and signal quality, ensuring the reliability of communication.

[0110] In this embodiment, the downhole transceiver 14 further includes a third analog circuit module, the first analog circuit module includes a first digital switch power supply submodule and a first feedback protection submodule, and the third analog circuit module includes a plurality of first amplification submodules, a plurality of first hardware filtering submodules and a plurality of first analog-to-digital conversion submodules;

[0111] The ground transceiver further includes a fourth analog circuit module, the second analog circuit module includes a second digital switch power supply submodule and a second feedback protection submodule, and the fourth analog circuit module includes a plurality of second amplification modules, a plurality of second hardware filtering modules and a plurality of second analog-to-digital conversion modules;

[0112] The first transmission control submodule is used to control the data flow based on the first transmission waveform, adjust the first output voltage of the first digital switch power submodule, and generate the first phase-shifted modulation signal of the first power based on the adjusted first output voltage; the first feedback protection submodule is used to detect the first operating parameter of the first digital switch power submodule, and feed back the first operating parameter to the first transmission control submodule, so that the first transmission control submodule adjusts the first output voltage based on the first operating parameter;

[0113] For each of the second amplifying modules, the second amplifying module is used to amplify the first phase-shift modulated signal; for each of the second hardware filtering modules, the second hardware filtering module is used to perform hardware filtering on the amplified first phase-shift modulated signal; for each of the second analog-to-digital conversion modules, the second analog-to-digital conversion module is used to convert the first phase-shift modulated signal after the hardware filtering into the first digital signal;

[0114] The second transmission control submodule is used to control the data flow based on the second transmission waveform, adjust the second output voltage of the second digital switch power submodule, and generate the second phase-shifted modulation signal of the second power based on the adjusted second output voltage; the second feedback protection submodule is used to detect the second operating parameter of the second digital switch power submodule, and feed back the second operating parameter to the second transmission control submodule, so that the second transmission control submodule adjusts the second output voltage based on the second operating parameter;

[0115] For each of the first amplifying submodules, the first amplifying submodule is used to amplify the second phase-shift modulated signal; for each of the first hardware filtering submodules, the first hardware filtering submodule is used to perform hardware filtering on the second phase-shift modulated signal after the amplification; for each of the first analog-to-digital conversion submodules, the first analog-to-digital conversion submodule is used to convert the second phase-shift modulated signal after the hardware filtering into the second digital signal.

[0116] In this embodiment, the first analog circuit module further includes a first sending switch, the third analog circuit module further includes a first receiving switch, the second analog circuit module further includes a second sending switch, and the fourth analog circuit module further includes a second receiving switch. When the underground transceiver system 1 is used as a sending end and the ground transceiver system 2 is used as a receiving end, the first sending switch and the second receiving switch are turned on, and the first receiving switch and the second sending switch are turned off.

[0117] The emission control submodule controls the content of each data of the data stream according to the corresponding emission waveform, controls the output voltage of the corresponding digital switch power submodule, and generates a BPSK signal after the power is increased, that is, a phase shift modulation signal. The first operating parameter and the second operating parameter may both include detecting the output voltage and detecting the output current. The feedback protection submodule detects the detected output voltage and the detected output current of the digital switch power submodule, and feeds back the data of the detected output voltage and the detected output current to the corresponding emission control submodule. The emission control submodule adjusts the output voltage of the digital switch power submodule according to the data content of the current emission waveform control data stream, the detected output voltage, and the detected output current. When the detected output current exceeds the rated current, the feedback protection submodule can turn off the output of the digital switch power submodule.

[0118] The digital switching power supply submodule is a digital switching power supply. By using the digital switching power supply as a power amplifier for downhole transmission, the power loss during downhole transmission is reduced, and the temperature rise of the downhole transceiver 14 is reduced.

[0119] Through the downhole antenna 12, the second phase-shifted modulated signal can be connected to multiple first amplifying submodules for signal amplification. The outputs of multiple pre-stage first amplifying submodules of the downhole receiver are respectively connected to their corresponding first hardware filtering submodules for hardware filtering. The output signals of multiple first hardware filtering submodules of the downhole receiver are respectively connected to their corresponding first analog-to-digital conversion submodules. The first receiving processing module also includes a first adder, and the data output by multiple first analog-to-digital conversion submodules are digitally added in the first adder to obtain a second digital signal.

[0120] Through the ground antenna, the first phase-shifted modulated signal can be connected to multiple second amplifying submodules for signal amplification. The outputs of multiple pre-second amplifying submodules of the downhole receiver are respectively connected to their corresponding second hardware filtering submodules for hardware filtering. The output signals of multiple second hardware filtering submodules of the ground receiver are respectively connected to their corresponding second analog-to-digital conversion submodules. The second receiving processing module also includes a second adder, and the data output by multiple second analog-to-digital conversion submodules are digitally added in the second adder to obtain a first digital signal.

[0121] By adopting multi-channel amplification, filtering, and analog-to-digital conversion and then adding them at the receiving end, the random noise introduced by the transceiver during the amplification, filtering, and analog-to-digital conversion process is reduced, the anti-interference ability of information transmission is improved, and the reliability of information transmission is increased.

[0122] Based on the same technical concept, the embodiment of the present application also provides a method for electromagnetic wave multi-channel bidirectional transmission while drilling, which can be executed by a device, which can be a server or a terminal device, wherein the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smart phone, a tablet computer, a desktop computer, etc., but is not limited thereto.

[0123] A method for multi-channel bidirectional transmission of electromagnetic waves while drilling is implemented by electronic equipment. The main process of the method is described as follows:

[0124] Based on a preset target correspondence, the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period are obtained, wherein the target correspondence is a correspondence between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module;

[0125] In the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, the first sending processing module is controlled to receive the first initial data sent by the downhole measurement equipment, and the first initial data is respectively subjected to source coding processing, convolution coding processing, and symbol repetition processing, and the processed data is sent to the second receiving processing module based on the downhole antenna and the ground antenna; and the second receiving processing module is controlled to perform symbol decoding processing, convolution decoding processing, and source decoding processing on the data sent by the first sending processing module, and send the processed data to the PC;

[0126] In the current time period, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on, and the receiving function of the ground transceiver system is turned off, the second sending processing module is controlled to receive the second initial data sent by the PC, and the second initial data is subjected to source coding, convolution coding and symbol repetition processing, and the processed data is sent to the first receiving processing module based on the ground antenna and the downhole antenna; and the first receiving processing module is controlled to perform symbol decoding, convolution decoding and source decoding on the data sent by the second sending processing module, and the processed data is sent to the downhole measurement equipment.

[0127] In this embodiment, the controlling the first sending processing module to receive the first initial data sent by the downhole measurement device, and performing source coding processing, convolution coding processing and symbol repetition processing on the first initial data respectively, includes:

[0128] Performing source coding processing on the first initial data to obtain a first source bit stream; performing convolution coding processing on the first source bit stream to obtain a first convolution code bit stream; generating a first frame bit stream based on the first convolution code bit stream; performing symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream, digitally modulating the downhole transmission bit stream to generate a first modulated data stream, generating a first phase shift modulation signal of a first power based on the first modulated data stream, and sending the first phase shift modulation signal to the second receiving processing module;

[0129] The controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module respectively includes:

[0130] Convert the first phase-shift modulation signal into a first digital signal; perform digital filtering calculation on the first digital signal to obtain a first digital modulation signal; perform filtering processing on the first digital modulation signal to obtain a first sampling data stream; obtain a first symbol demodulation data stream based on the first sampling data stream, and perform data frame synchronization based on the first symbol demodulation data stream; perform symbol decoding processing on the first symbol demodulation data stream after data frame synchronization; perform convolution decoding processing on the data after symbol decoding processing to obtain the first source bit stream; perform source decoding processing on the first source bit stream to obtain the first initial data, and send the first initial data to the PC.

[0131] In this embodiment, the controlling the second sending processing module to receive the second initial data sent by the PC, and performing source coding processing, convolution coding processing and symbol repetition processing on the second initial data respectively, includes:

[0132] Performing source coding processing on the second initial data to obtain a second source bit stream; performing convolution coding processing on the second source bit stream to obtain a second convolution code bit stream; generating a second frame bit stream based on the second convolution code bit stream; performing symbol repetition processing on the second frame bit stream to obtain a ground transmission bit stream, digitally modulating the ground transmission bit stream to generate a second modulated data stream, generating a second phase shift modulation signal of a second power based on the second modulated data stream, and sending the second phase shift modulation signal to the first receiving processing module;

[0133] The controlling the first receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module respectively includes:

[0134] Convert the second phase-shift modulation signal into a second digital signal; perform digital filtering calculation on the second digital signal to obtain a second digital modulation signal; perform filtering processing on the second digital modulation signal to obtain a second sampled data stream; obtain a second symbol demodulation data stream based on the second sampled data stream, and perform data frame synchronization based on the second symbol demodulation data stream; perform symbol decoding processing on the second symbol demodulation data stream after data frame synchronization; perform convolution decoding processing on the data after symbol decoding processing to obtain the second source bit stream; perform source decoding processing on the second source bit stream to obtain the second initial data, and send the second initial data to the downhole measurement equipment.

[0135] In this embodiment, the source coding processing is performed on the first initial data to obtain a first source bit stream, including: allocating the first initial data to multiple processing channels of a first source coding submodule, and for each processing channel in the first source coding submodule, adding a CRC check code to the first initial data corresponding to the processing channel to generate data frame content; for each processing channel in the first source coding submodule, intercepting the maximum valid bit of the data frame content corresponding to the processing channel to obtain the first source bit stream.

[0136] The performing source coding processing on the second initial data to obtain a second source bit stream includes: allocating the second initial data to multiple processing channels of a second source coding submodule, and for each processing channel in the second source coding submodule, adding a CRC check code to the second initial data corresponding to the processing channel to generate data frame content; for each processing channel in the second source coding submodule, intercepting the maximum valid bit of the data frame content corresponding to the processing channel to obtain the second source bit stream.

[0137] Based on the same technical concept, the present application also provides an electromagnetic wave drilling multi-channel bidirectional transmission device, which mainly includes:

[0138] An acquisition module is used to acquire the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period based on a preset target correspondence relationship, wherein the target correspondence relationship is a correspondence relationship between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module;

[0139] A first control module is used for, in the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, then controlling the first sending processing module to receive the first initial data sent by the downhole measurement equipment, performing source coding processing, convolution coding processing and symbol repetition processing on the first initial data, and sending the processed data to the second receiving processing module based on the downhole antenna and the ground antenna; and controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module, and sending the processed data to the PC;

[0140] The second control module is used for, in the current time period, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on, and the receiving function of the ground transceiver system is turned off, then controlling the second sending processing module to receive the second initial data sent by the PC, performing source coding processing, convolution coding processing and symbol repetition processing on the second initial data, and sending the processed data to the first receiving processing module based on the ground antenna and the downhole antenna; and controlling the first receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module, and sending the processed data to the downhole measurement equipment.

[0141] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0142] Based on the same technical concept, the present application also provides an electronic device, such as Figure 7 As shown, the electronic device 100 includes a processor 101 and a memory 102 , and may further include an information input / information output I / O interface 103 , one or more of a communication component 104 , and a communication bus 105 .

[0143] The processor 101 is used to control the overall operation of the electronic device 100 to complete all or part of the steps in the above-mentioned electromagnetic wave multi-channel bidirectional transmission method while drilling; the memory 102 is used to store various types of data to support the operation of the electronic device 100, and these data may include, for example, instructions for any application or method operated on the electronic device 100, and data related to the application. The memory 102 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0144] The I / O interface 103 provides an interface between the processor 101 and other interface modules, and the above-mentioned other interface modules can be keyboards, mice, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 104 is used to test the wired or wireless communication between the electronic device 100 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 104 can include: Wi-Fi components, Bluetooth components, NFC components.

[0145] The communication bus 105 may include a path to transmit information between the above components. The communication bus 105 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The communication bus 105 may be divided into an address bus, a data bus, a control bus, etc.

[0146] The electronic device 100 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the electromagnetic wave multi-channel bidirectional transmission method while drilling given in the above embodiment.

[0147] The electronic device 100 may include but is not limited to mobile terminals such as digital broadcast receivers, PDAs (personal digital assistants), PMPs (portable multimedia players), etc., and fixed terminals such as digital TVs, desktop computers, etc., and may also be servers, etc.

[0148] Based on the same technical concept, the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned electromagnetic wave multi-channel bidirectional transmission method while drilling are implemented.

[0149] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0150] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0151] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0152] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0153] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electromagnetic wave multi-channel bidirectional transmission system while drilling, characterized in that: It includes a downhole transceiver system, a ground transceiver system, downhole measurement equipment and a PC, wherein the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; The downhole transceiver includes a first digital signal processing module, which includes a first sending processing module and a first receiving processing module; the surface transceiver includes a second digital signal processing module, which includes a second sending processing module and a second receiving processing module; The first sending processing module is used to receive the first initial data sent by the downhole measurement equipment under the first condition corresponding to the current time period, perform source coding processing, convolution coding processing and symbol repetition processing on the first initial data, and send the processed data to the second receiving processing module based on the downhole antenna and the ground antenna; The second receiving processing module is used to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module under a first condition corresponding to the current time period, and send the processed data to the PC, wherein the first condition is to enable the sending function of the downhole transceiver system, disable the receiving function of the downhole transceiver system, disable the sending function of the ground transceiver system and enable the receiving function of the ground transceiver system; The second sending processing module is used to receive the second initial data sent by the PC under the second condition corresponding to the current time period, perform source coding processing, convolution coding processing and symbol repetition processing on the second initial data, and send the processed data to the first receiving processing module based on the ground antenna and the downhole antenna; The first receiving processing module is used to perform codeword decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module under the second condition corresponding to the current time period, and send the processed data to the downhole measurement equipment. The second condition is to turn off the sending function of the downhole transceiver system, turn on the receiving function of the downhole transceiver system, turn on the sending function of the ground transceiver system and turn off the receiving function of the ground transceiver system.

2. The electromagnetic wave multi-channel bidirectional transmission system while drilling according to claim 1, characterized in that: The first sending processing module includes a first information source coding submodule, a first convolution coding submodule, a first frame generation submodule, a first symbol repetition submodule and a first digital modulation submodule, and the first receiving processing module includes a first bandpass filtering submodule, a first extraction filtering submodule, a first frame synchronization submodule, a first symbol decoding submodule, a first convolution decoding submodule and a first information source decoding submodule; The first information source coding submodule, the first convolution coding submodule, the first frame generation submodule, the first symbol repetition submodule, the first digital modulation submodule, the first bandpass filtering submodule, the first decimation filtering submodule, the first frame synchronization submodule, the first symbol decoding submodule, the first convolution decoding submodule and the first information source decoding submodule each include a plurality of processing channels; For each processing channel in the first source coding submodule, it is used to perform source coding processing on the first initial data to obtain a first source bit stream; for each processing channel in the first convolution coding submodule, it is used to perform convolution coding processing on the first source bit stream to obtain a first convolution code bit stream; for each processing channel in the first frame generation submodule, it is used to generate a first frame bit stream based on the first convolution code bit stream; for each processing channel in the first symbol repetition submodule, it is used to perform symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream; for each processing channel in the first digital modulation submodule, it is used to perform digital modulation on the downhole transmission bit stream to generate a first modulated data stream; The downhole transceiver is further used to generate a first phase-shifted modulation signal of a first power based on the plurality of the first modulation data streams, and send the first phase-shifted modulation signal to the second receiving and processing module; The second sending processing module includes a second information source coding submodule, a second convolution coding submodule, a second frame generation submodule, a second symbol repetition submodule, and a second digital modulation submodule, and the second receiving processing module includes a second bandpass filtering submodule, a second extraction filtering submodule, a second frame synchronization submodule, a second symbol decoding submodule, a second convolution decoding submodule, and a second information source decoding submodule; The second information source encoding submodule, the second convolution encoding submodule, the second frame generation submodule, the second symbol repetition submodule, the second digital modulation submodule, the second bandpass filtering submodule, the second decimation filtering submodule, the second frame synchronization submodule, the second symbol decoding submodule, the second convolution decoding submodule and the second information source decoding submodule each include a plurality of processing channels; The ground transceiver is further used to convert the first phase-shift modulated signal into a first digital signal; For each processing channel in the second bandpass filter submodule, it is used to perform digital filtering calculation on the first digital signal to obtain a first digital modulation signal; for each processing channel in the second extraction filter submodule, it is used to perform filtering processing on the first digital modulation signal to obtain a first sampled data stream; For each processing channel in the second frame synchronization submodule, it is used to obtain a first symbol demodulation data stream based on the first sampled data stream, and perform data frame synchronization based on the first symbol demodulation data stream; For each processing channel in the second symbol decoding submodule, it is used to perform symbol decoding processing on the first symbol demodulated data stream after data frame synchronization; For each processing channel in the second convolution decoding submodule, it is used to perform convolution decoding processing on the data after the codeword decoding processing to obtain the first information source bit stream; for each processing channel in the second information source decoding submodule, it is used to perform source decoding processing on the first information source bit stream to obtain the first initial data, and send the first initial data to the PC; For each processing channel in the second source coding submodule, it is used to perform source coding processing on the second initial data to obtain a second source bit stream; for each processing channel in the second convolution coding submodule, it is used to perform convolution coding processing on the second source bit stream to obtain a second convolution code bit stream; for each processing channel in the second frame generation submodule, it is used to generate a second frame bit stream based on the second convolution code bit stream; For each processing channel in the second symbol repetition submodule, it is used to perform symbol repetition processing on the second frame bit stream to obtain a ground transmission bit stream; for each processing channel in the second digital modulation submodule, it is used to perform digital modulation on the ground transmission bit stream to generate a second modulated data stream; The ground transceiver is further used to generate a second phase-shifted modulation signal of a second power based on the plurality of the second modulated data streams, and send the second phase-shifted modulation signal to the first receiving processing module; The downhole transceiver is further used to convert the second phase-shift modulated signal into a second digital signal; For each processing channel in the first bandpass filtering submodule, it is used to perform digital filtering calculation on the second digital signal to obtain a second digital modulation signal; for each processing channel in the first extraction filtering submodule, it is used to perform filtering processing on the second digital modulation signal to obtain a second sampled data stream; For each processing channel in the first frame synchronization submodule, it is used to obtain a second symbol demodulated data stream based on the second sampled data stream, and perform data frame synchronization based on the second symbol demodulated data stream; For each processing channel in the first symbol decoding submodule, a symbol decoding process is performed on the second symbol demodulated data stream after data frame synchronization; For each processing channel in the first convolution decoding submodule, it is used to perform convolution decoding on the data after codeword decoding processing to obtain the second source bit stream; for each processing channel in the first source decoding submodule, it is used to perform source decoding on the second source bit stream to obtain the second initial data, and send the second initial data to the downhole measurement equipment.

3. The electromagnetic wave multi-channel bidirectional transmission system while drilling according to claim 2, characterized in that: The first transmission processing module further includes a first multiplexer submodule and a first transmission control submodule, the downhole transceiver further includes a first analog circuit module, the second transmission processing module further includes a second multiplexer submodule and a second transmission control submodule, and the surface transceiver further includes a second analog circuit module; The first multi-channel synthesis submodule is used to add the first modulated data streams to generate a first transmission waveform control data stream; The first transmission control submodule is used to control the data flow based on the first transmission waveform, and control the first analog circuit module to generate the first phase-shifted modulation signal of the first power; The second multiplex synthesis submodule is used to add the second modulated data streams to generate a second transmission waveform control data stream; The second transmission control submodule is used to control the data flow based on the second transmission waveform, and control the second analog circuit module to generate the second phase-shifted modulation signal of the second power.

4. The electromagnetic wave multi-channel bidirectional transmission system while drilling according to claim 3, characterized in that: The downhole transceiver further includes a third analog circuit module, the first analog circuit module includes a first digital switch power supply submodule and a first feedback protection submodule, the third analog circuit module includes a plurality of first amplification submodules, a plurality of first hardware filtering submodules and a plurality of first analog-to-digital conversion submodules; The ground transceiver further includes a fourth analog circuit module, the second analog circuit module includes a second digital switch power supply submodule and a second feedback protection submodule, and the fourth analog circuit module includes a plurality of second amplification modules, a plurality of second hardware filtering modules and a plurality of second analog-to-digital conversion modules; The first transmission control submodule is used to control the data flow based on the first transmission waveform, adjust the first output voltage of the first digital switch power supply submodule, and generate the first phase-shifted modulation signal of the first power based on the adjusted first output voltage; The first feedback protection submodule is used to detect a first operating parameter of the first digital switch power supply submodule, and feed the first operating parameter back to the first emission control submodule, so that the first emission control submodule adjusts the first output voltage based on the first operating parameter; For each of the second amplifying modules, the second amplifying module is used to amplify the first phase-shift modulated signal; for each of the second hardware filtering modules, the second hardware filtering module is used to perform hardware filtering on the amplified first phase-shift modulated signal; for each of the second analog-to-digital conversion modules, the second analog-to-digital conversion module is used to convert the first phase-shift modulated signal after the hardware filtering into the first digital signal; The second transmission control submodule is used to control the data flow based on the second transmission waveform, adjust the second output voltage of the second digital switching power supply submodule, and generate the second phase-shifted modulation signal of the second power based on the adjusted second output voltage; The second feedback protection submodule is used to detect a second operating parameter of the second digital switch power supply submodule, and feed back the second operating parameter to the second emission control submodule, so that the second emission control submodule adjusts the second output voltage based on the second operating parameter; For each of the first amplifying submodules, the first amplifying submodule is used to amplify the second phase-shift modulated signal; for each of the first hardware filtering submodules, the first hardware filtering submodule is used to perform hardware filtering on the second phase-shift modulated signal after the amplification; for each of the first analog-to-digital conversion submodules, the first analog-to-digital conversion submodule is used to convert the second phase-shift modulated signal after the hardware filtering into the second digital signal.

5. An electromagnetic wave while drilling multi-channel bidirectional transmission method applied to the electromagnetic wave while drilling multi-channel bidirectional transmission system according to any one of claims 1 to 4, characterized in that: include: Based on a preset target correspondence, the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period are obtained, wherein the target correspondence is a correspondence between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module; In the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, the first sending processing module is controlled to receive the first initial data sent by the downhole measurement equipment, and the first initial data is respectively subjected to source coding processing, convolution coding processing, and symbol repetition processing, and the processed data is sent to the second receiving processing module based on the downhole antenna and the ground antenna; and controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module, and sending the processed data to the PC; In the current time period, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on, and the receiving function of the ground transceiver system is turned off, the second sending processing module is controlled to receive the second initial data sent by the PC, and the second initial data is respectively subjected to source coding processing, convolution coding processing and symbol repetition processing, and the processed data is sent to the first receiving processing module based on the ground antenna and the downhole antenna; The first receiving processing module is controlled to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module, and the processed data is sent to the downhole measurement equipment.

6. The electromagnetic wave multi-channel bidirectional transmission method while drilling according to claim 5, characterized in that: The controlling the first sending processing module to receive the first initial data sent by the downhole measurement device, and performing source coding processing, convolution coding processing and symbol repetition processing on the first initial data respectively, includes: Performing source coding processing on the first initial data to obtain a first source bit stream; performing convolution coding processing on the first source bit stream to obtain a first convolution code bit stream; generating a first frame bit stream based on the first convolution code bit stream; performing symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream, digitally modulating the downhole transmission bit stream to generate a first modulated data stream, generating a first phase shift modulation signal of a first power based on the first modulated data stream, and sending the first phase shift modulation signal to the second receiving processing module; The controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module respectively includes: Convert the first phase-shift modulation signal into a first digital signal; perform digital filtering calculation on the first digital signal to obtain a first digital modulation signal; perform filtering processing on the first digital modulation signal to obtain a first sampled data stream; obtain a first symbol demodulation data stream based on the first sampled data stream, and perform data frame synchronization based on the first symbol demodulation data stream; perform symbol decoding processing on the first symbol demodulation data stream after data frame synchronization; perform convolution decoding processing on the data after symbol decoding processing to obtain the first information source bit stream; perform source decoding processing on the first information source bit stream to obtain the first initial data, and send the first initial data to the PC; The controlling the second sending processing module to receive the second initial data sent by the PC, and performing source coding processing, convolution coding processing and symbol repetition processing on the second initial data respectively, comprises: Performing source coding processing on the second initial data to obtain a second source bit stream; performing convolution coding processing on the second source bit stream to obtain a second convolution code bit stream; generating a second frame bit stream based on the second convolution code bit stream; performing symbol repetition processing on the second frame bit stream to obtain a ground transmission bit stream, digitally modulating the ground transmission bit stream to generate a second modulated data stream, generating a second phase shift modulation signal of a second power based on the second modulated data stream, and sending the second phase shift modulation signal to the first receiving processing module; The controlling the first receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module respectively includes: Convert the second phase-shift modulation signal into a second digital signal; perform digital filtering calculation on the second digital signal to obtain a second digital modulation signal; perform filtering processing on the second digital modulation signal to obtain a second sampled data stream; obtain a second symbol demodulation data stream based on the second sampled data stream, and perform data frame synchronization based on the second symbol demodulation data stream; perform symbol decoding processing on the second symbol demodulation data stream after data frame synchronization; perform convolution decoding processing on the data after symbol decoding processing to obtain the second source bit stream; perform source decoding processing on the second source bit stream to obtain the second initial data, and send the second initial data to the downhole measurement equipment.

7. The electromagnetic wave multi-channel bidirectional transmission method while drilling according to claim 6, characterized in that: The performing source coding on the first initial data to obtain a first source bit stream includes: Allocating the first initial data to multiple processing channels of the first information source coding submodule, and for each processing channel in the first information source coding submodule, adding a CRC check code to the first initial data corresponding to the processing channel to generate data frame content; For each processing channel in the first information source coding submodule, the maximum valid bit of the data frame content corresponding to the processing channel is intercepted to obtain the first information source bit stream.

8. An electromagnetic wave multi-channel bidirectional transmission device while drilling, characterized in that: include: An acquisition module is used to acquire the transceiver function switch state of the downhole transceiver system and the transceiver function switch state of the ground transceiver system corresponding to the current time period based on a preset target correspondence relationship, wherein the target correspondence relationship is a correspondence relationship between a plurality of different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the ground transceiver system includes a ground transceiver and a ground antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first sending processing module and a first receiving processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second sending processing module and a second receiving processing module; A first control module is used for, in the current time period, if the sending function of the downhole transceiver system is turned on, the receiving function of the downhole transceiver system is turned off, the sending function of the ground transceiver system is turned off, and the receiving function of the ground transceiver system is turned on, then controlling the first sending processing module to receive the first initial data sent by the downhole measurement equipment, performing source coding processing, convolution coding processing and symbol repetition processing on the first initial data, and sending the processed data to the second receiving processing module based on the downhole antenna and the ground antenna; and controlling the second receiving processing module to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the first sending processing module, and sending the processed data to the PC; a second control module, configured to control the second sending processing module to receive the second initial data sent by the PC, perform source coding, convolution coding and symbol repetition processing on the second initial data, and send the processed data to the first receiving processing module based on the ground antenna and the downhole antenna, if the sending function of the downhole transceiver system is turned off, the receiving function of the downhole transceiver system is turned on, the sending function of the ground transceiver system is turned on and the receiving function of the ground transceiver system is turned off during the current time period; The first receiving processing module is controlled to perform symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module, and the processed data is sent to the downhole measurement equipment.

9. An electronic device, characterized in that: comprising a processor and a memory, wherein the processor is coupled to the memory; The processor is configured to execute the computer program stored in the memory, so that the electronic device executes the method according to any one of claims 5 to 7.

10. A computer-readable storage medium, characterized in that: The method comprises a computer program or an instruction, which, when executed on a computer, causes the computer to execute the method according to any one of claims 5 to 7.

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