Electromagnetic Wave Measurement While Drilling Multichannel Bidirectional Transmission System, Method, Device, Equipment and Medium

Abstract

The present application relates to an electromagnetic wave while-drilling multi-channel bidirectional transmission system, method, device, equipment and medium. The system includes a downhole transceiver system, a surface transceiver system, downhole measurement equipment and a PC. The downhole transceiver system includes a downhole transceiver and a downhole antenna, and the surface transceiver system includes a surface transceiver and a surface antenna. The downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first transmission processing module and a first reception processing module. The surface transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module. The downhole transceiver system and the surface transceiver system of the present application time-division multiplex the electromagnetic wave channel, reducing the impact of conflicts and interference during data transmission. Source coding processing, convolutional coding processing and symbol repetition processing are performed on the initial data, enabling the wireless electromagnetic wave to be transmitted more efficiently, stably and reliably while drilling.

Description

Technical Field

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

[0002] In the exploration and development of mineral resources such as oil and natural gas, the wireless measurement while drilling (MWD) technology plays a crucial role. 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 two methods for data transmission: mud pulse and electromagnetic wave. Among them, the wireless electromagnetic wave transmission technology while drilling 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, in extremely complex geological conditions, the traditional wireless electromagnetic wave transmission technology while drilling faces many challenges. Due to the differences in the electrical properties of formations in different regions, wireless electromagnetic wave signals are interfered by formation noise, wellsite 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, and high temperature and high pressure, these problems are particularly prominent, seriously affecting the accuracy and reliability of data transmission in the wireless electromagnetic wave while drilling system, making it difficult to meet the actual requirements of data transmission accuracy and reliability. Therefore, there is an urgent need for a more efficient, stable, and reliable technical solution for wireless electromagnetic wave transmission while drilling to meet the drilling operation requirements under complex geological conditions. Summary of the Invention

[0004] In order to enable more efficient, stable, and reliable electromagnetic wave transmission while drilling, this application provides an electromagnetic wave multiple-channel bidirectional transmission system, method, device, equipment, and medium while drilling.

[0005] In a first aspect, this application provides an electromagnetic wave multiple-channel bidirectional transmission system while drilling, including a downhole transceiver system, a surface transceiver system, downhole measurement equipment, and a PC. The downhole transceiver system includes a downhole transceiver and a downhole antenna, and the surface transceiver system includes a surface transceiver and a surface antenna;

[0006] The downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first transmission processing module and a first reception processing module; the surface transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module;

[0007] The first transmission processing module is configured to receive first initial data sent by the downhole measurement device under the first condition corresponding to the current time period, perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and send the processed data to the second reception processing module based on the downhole antenna and the ground antenna; the second reception processing module is configured to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively 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 transmission function of the downhole transceiver system, turn off the reception function of the downhole transceiver system, turn off the transmission function of the ground transceiver system, and turn on the reception function of the ground transceiver system.

[0008] The second transmission processing module is configured to receive second initial data sent by the PC under the second condition corresponding to the current time period, perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and send the processed data to the first reception processing module based on the ground antenna and the downhole antenna; the first reception processing module is configured to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second transmission processing module respectively under the second condition corresponding to the current time period, and send the processed data to the downhole measurement device. The second condition is to turn off the transmission function of the downhole transceiver system, turn on the reception function of the downhole transceiver system, turn on the transmission function of the ground transceiver system, and turn off the reception function of the ground transceiver system.

[0009] The beneficial effects of this application are as follows: The downhole transceiver system and the ground transceiver system multiplex the electromagnetic wave channel in a time-sharing manner, reducing the impact of conflicts and interferences during data transmission. The sending end of data interaction performs source coding processing, convolutional coding processing, and symbol repetition processing on the initial data, and the receiving end of data interaction performs symbol decoding processing, convolutional decoding processing, and source decoding processing on the received data, enabling more efficient, stable, and reliable transmission of wireless electromagnetic waves while drilling.

[0010] Furthermore, the first transmission processing module includes a first source coding sub-module, a first convolutional coding sub-module, a first frame generation sub-module, a first symbol repetition sub-module, and a first digital modulation sub-module. The first reception processing module includes a first band-pass filtering sub-module, a first decimation filtering sub-module, a first frame synchronization sub-module, a first symbol decoding sub-module, a first convolutional decoding sub-module, and a first source decoding sub-module.

[0011] The first source coding sub-module, the first convolutional coding sub-module, the first frame generation sub-module, the first symbol repetition sub-module, the first digital modulation sub-module, the first band-pass filtering sub-module, the first decimation filtering sub-module, the first frame synchronization sub-module, the first symbol decoding sub-module, the first convolutional decoding sub-module, and the first source decoding sub-module each include a plurality of processing channels;

[0012] For each processing channel in the first source coding sub-module, 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 convolutional coding sub-module, it is used to perform convolutional coding processing on the first source bit stream to obtain a first convolutional code bit stream; for each processing channel in the first frame generation sub-module, it is used to generate a first frame bit stream based on the first convolutional code bit stream; for each processing channel in the first symbol repetition sub-module, 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 sub-module, 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 configured to generate a first-phase shift modulation signal with a first power based on a plurality of the first modulated data streams and send the first-phase shift modulation signal to the second receiving processing module;

[0014] The second transmitting processing module includes a second source coding sub-module, a second convolutional coding sub-module, a second frame generation sub-module, a second symbol repetition sub-module, and a second digital modulation sub-module, and the second receiving processing module includes a second band-pass filtering sub-module, a second decimation filtering sub-module, a second frame synchronization sub-module, a second symbol decoding sub-module, a second convolutional decoding sub-module, and a second source decoding sub-module;

[0015] The second source coding sub-module, the second convolutional coding sub-module, the second frame generation sub-module, the second symbol repetition sub-module, the second digital modulation sub-module, the second band-pass filtering sub-module, the second decimation filtering sub-module, the second frame synchronization sub-module, the second symbol decoding sub-module, the second convolutional decoding sub-module, and the second source decoding sub-module each include a plurality of processing channels;

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

[0017] For each processing channel in the second band-pass filtering sub-module, 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 decimation filtering sub-module, 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 sub-module, 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 sub-module, 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 convolutional decoding sub-module, it is used to perform convolutional 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 sub-module, 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 encoding sub-module, it is used to perform source encoding processing on the second initial data to obtain a second source bit stream; for each processing channel in the second convolutional encoding sub-module, it is used to perform convolutional encoding processing on the second source bit stream to obtain a second convolutional code bit stream; for each processing channel in the second frame generation sub-module, it is used to generate a second frame bit stream based on the second convolutional code bit stream; for each processing channel in the second symbol repetition sub-module, 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 sub-module, it is used to perform digital modulation on the ground transmission bit stream to generate a second modulated data stream;

[0019] The ground transceiver is further configured to generate a second-phase shift modulation signal with a second power based on multiple second modulated data streams, and send the second-phase shift modulation signal to the first receiving processing module;

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

[0021] For each processing channel in the first band-pass filtering sub-module, 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 decimation filtering sub-module, 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 sub-module, 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 sub-module, 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 convolutional decoding sub-module, it is used to perform convolutional 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 sub-module, 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 device.

[0022] The beneficial effects of adopting the above further scheme are as follows: Multi-frequency simultaneous transceiver is adopted to realize the simultaneous reception and transmission of multi-frequency signals, improving the utilization rate of channels. By using the decimation filters corresponding to the decimation filtering sub-module, the carrier data streams of each channel can be decelerated to the low-speed data streams with a k-fold frequency of the symbol frequency, improving the reliability of the carrier signal.

[0023] Further, the first transmission processing module further includes a first multiplexing sub-module and a first transmission control sub-module, the downhole transceiver further includes a first analog circuit module, the second transmission processing module further includes a second multiplexing sub-module and a second transmission control sub-module, and the ground transceiver further includes a second analog circuit module;

[0024] The first multiplexing sub-module is used to add up each first modulation data stream to generate a first transmission waveform control data stream; the first transmission control sub-module is used to control the first analog circuit module to generate the first phase-shift modulation signal with the first power based on the first transmission waveform control data stream;

[0025] The second multiplexing sub-module is used to add up each second modulation data stream to generate a second transmission waveform control data stream; the second transmission control sub-module is used to control the second analog circuit module to generate the second phase-shift modulation signal with the second power based on the second transmission waveform control data stream.

[0026] The beneficial effects of adopting the above further scheme are as follows: Through the first multiplexing sub-module and the second multiplexing sub-module, multiple modulation data streams can be added up to generate a transmission waveform control data stream, which helps to transmit more information within a limited bandwidth, thereby improving the communication efficiency.

[0027] Further, the downhole transceiver further includes a third analog circuit module. The first analog circuit module includes a first digital switching power supply sub-module and a first feedback protection sub-module. The third analog circuit module includes a plurality of first amplification sub-modules, a plurality of first hardware filtering sub-modules, and a plurality of first analog-to-digital conversion sub-modules;

[0028] The surface transceiver further includes a fourth analog circuit module. The second analog circuit module includes a second digital switching power supply sub-module and a second feedback protection sub-module. 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 sub-module is configured to control the data stream based on the first transmission waveform, adjust the first output voltage of the first digital switching power supply sub-module, so as to generate the first-phase shift modulation signal with the first power based on the adjusted first output voltage; the first feedback protection sub-module is configured to detect the first operating parameter of the first digital switching power supply sub-module, and feedback the first operating parameter to the first transmission control sub-module, so that the first transmission control sub-module adjusts the first output voltage based on the first operating parameter;

[0030] For each of the second amplification modules, the second amplification module is configured to perform amplification processing on the first-phase shift modulation signal; for each of the second hardware filtering modules, the second hardware filtering module is configured to perform hardware filtering processing on the amplified first-phase shift modulation signal; for each of the second analog-to-digital conversion modules, the second analog-to-digital conversion module is configured to convert the first-phase shift modulation signal after hardware filtering processing into the first digital signal;

[0031] The second transmission control sub-module is configured to control the data stream based on the second transmission waveform, adjust the second output voltage of the second digital switching power supply sub-module, so as to generate the second-phase shift modulation signal with the second power based on the adjusted second output voltage; the second feedback protection sub-module is configured to detect the second operating parameter of the second digital switching power supply sub-module, and feedback the second operating parameter to the second transmission control sub-module, so that the second transmission control sub-module adjusts the second output voltage based on the second operating parameter;

[0032] For each of the first amplification sub-modules, the first amplification sub-module is configured to amplify the second phase-shift modulation signal; for each of the first hardware filtering sub-modules, the first hardware filtering sub-module is configured to perform hardware filtering on the amplified second phase-shift modulation signal; for each of the first analog-to-digital conversion sub-modules, the first analog-to-digital conversion sub-module is configured to convert the second phase-shift modulation signal after hardware filtering into the second digital signal.

[0033] The beneficial effects of adopting the above further solution are as follows: By using a digital switching power supply as the power amplifier for downhole transmission, the power loss during downhole transmission is reduced, and at the same time, the temperature rise of the downhole transceiver is reduced. By adding the signals after multi-channel amplification, filtering, and analog-to-digital conversion at the receiving end, the random noise introduced during the amplification, filtering, and analog-to-digital conversion processes of the transceiver 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 an electromagnetic wave measurement-while-drilling multi-channel bidirectional transmission method, including:

[0035] Based on a preset target correspondence relationship, obtain the transceiver function switch states of the downhole transceiver system and the ground transceiver system corresponding to the current time period, where the target correspondence relationship is the correspondence relationship between multiple different time periods and the transceiver function switch states of the downhole transceiver system and the ground transceiver system respectively; 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 transmission processing module and a first reception processing module; the ground transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module;

[0036] In the current time period, if the transmission function of the downhole transceiver system is turned on, the reception function of the downhole transceiver system is turned off, the transmission function of the ground transceiver system is turned off, and the reception function of the ground transceiver system is turned on, then control the first transmission processing module to receive the first initial data sent by the downhole measurement device, perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and send the processed data to the second reception processing module based on the downhole antenna and the ground antenna; and control the second reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively, and send the processed data to the PC.

[0037] In the current time period, if the transmission function of the downhole transceiver system is turned off, the reception function of the downhole transceiver system is turned on, the transmission function of the surface transceiver system is turned on, and the reception function of the surface transceiver system is turned off, then control the second transmission processing module to receive the second initial data sent by the PC, perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and based on the surface antenna and the downhole antenna, send the processed data to the first reception processing module; and control the first reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second transmission processing module respectively, and send the processed data to the downhole measurement device.

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

[0039] An acquisition module, configured to acquire the transceiver function switch states of the downhole transceiver system and the surface transceiver system corresponding to the current time period based on a preset target correspondence relationship, where the target correspondence relationship is the correspondence relationship between multiple different time periods and the transceiver function switch states of the downhole transceiver system and the surface transceiver system respectively; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the surface transceiver system includes a surface transceiver and a surface antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first transmission processing module and a first reception processing module; the surface transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module;

[0040] A first control module, configured to, in the current time period, if the transmission function of the downhole transceiver system is turned on, the reception function of the downhole transceiver system is turned off, the transmission function of the surface transceiver system is turned off, and the reception function of the surface transceiver system is turned on, then control the first transmission processing module to receive the first initial data sent by the downhole measurement device, perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and based on the downhole antenna and the surface antenna, send the processed data to the second reception processing module; and control the second reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively, and send the processed data to the PC.

[0041] The second control module is configured to, during the current period, if the transmission function of the downhole transceiver system is turned off, the reception function of the downhole transceiver system is turned on, the transmission function of the surface transceiver system is turned on, and the reception function of the surface transceiver system is turned off, control the second transmission processing module to receive the second initial data sent by the PC, perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and send the processed data to the first reception processing module based on the surface antenna and the downhole antenna; and control the first reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second transmission processing module respectively, and send the processed data to the downhole measurement device.

[0042] Fourthly, the present application provides an electronic device, including a processor and a memory, and the processor is coupled with the memory;

[0043] 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 the second aspect.

[0044] Fifthly, the present application provides a computer-readable storage medium, including a computer program or instruction, and when the computer program or instruction runs on a computer, the computer is made to execute the method according to any one of the second aspect. Description of the Drawings

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

[0046] Figure 2 It is a structural schematic diagram of the downhole transceiver system according to the embodiment of the present application;

[0047] Figure 3 It is a time-sharing division diagram of the transceiver functions according to the embodiment of the present application;

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

[0049] Figure 5 It is a structural block diagram of the surface transceiver system according to the embodiment of the present application;

[0050] Figure 6 It is a schematic diagram showing the symbol demodulation calculation according to the embodiment of the present application;

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

[0052] In the drawings, the list of components represented by each reference numeral is as follows:

[0053] 1. Downhole transceiver system; 11. Adapter; 12. Downhole antenna; 13. Pipe threading; 14. Downhole transceiver; 15. Drill collar; 2. Surface transceiver system; 3. PC; 4. Derrick; 5. Drill pipe. Detailed implementation mode

[0054] The following further elaborates on this application in conjunction with the attached drawings.

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

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

[0057] The first transmission 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, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and send the processed data to the second reception processing module based on the downhole antenna 12 and the surface antenna; the second reception processing module is used to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively under the first condition corresponding to the current time period, and send the processed data to the PC 3. The first condition is to turn on the transmission function of the downhole transceiver system, turn off the reception function of the downhole transceiver system, turn off the transmission function of the surface transceiver system, and turn on the reception function of the surface transceiver system.

[0058] The second transmission processing module is configured 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, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and send the processed data to the first reception processing module based on the surface antenna and the downhole antenna 12; the first reception processing module is configured to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second transmission processing module respectively under the second condition corresponding to the current time period, and send the processed data to the downhole measurement device, where the second condition is to turn off the transmission function of the downhole transceiver system, turn on the reception function of the downhole transceiver system, turn on the transmission function of the surface transceiver system, and turn off the reception function of the surface transceiver system.

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

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

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

[0062] The downhole transceiver system 1 further includes a drill collar 15, a through electrode wire, and a adapter 11. One end of the drill collar 15 is connected to the drill pipe 5, 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 wire 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 through electrode wire.

[0063] The downhole transceiver system 1 and the ground transceiver system 2 each have transceiver functions, and the ground antenna and the downhole antenna 12 are communicatively connected. When the downhole transceiver system 1 is the sending end for interactive data and the ground transceiver system 2 is the receiving end for 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 the receiving end for interactive data and the ground transceiver system 2 is the sending end for 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] As Figure 3 shown, the transceiver functions of the downhole transceiver system 1 and the ground transceiver system 2 can be switched in time slots, that is, there is a target correspondence relationship between the switch states of the transceiver functions of the downhole transceiver system 1 and the ground transceiver system 2 in multiple different time slots. Exemplarily, when the current time slot is T1, the downhole transceiver system 1 is the sending end for data interaction and the ground transceiver system 2 is the receiving end for data interaction; when the current time slot is T2, the downhole transceiver system 1 is the receiving end for data interaction and the ground transceiver system 2 is the sending end for data interaction; when the current time slot is T3, the downhole transceiver system 1 is the sending end for data interaction and the ground transceiver system 2 is the receiving end for data interaction; when the current time slot is T4, the downhole transceiver system 1 is the receiving end for data interaction and the ground transceiver system 2 is the sending end for data interaction.

[0065] The downhole transceiver system 1 and the ground transceiver system 2 share the electromagnetic wave channel in a time-division multiplexing manner, and are respectively responsible for data transmission and reception within the time slots, reducing the impact of conflicts and interference during data transmission, thereby improving the data transmission efficiency and reducing the electromagnetic interference between the downhole transceiver system 1 and the ground transceiver system 2.

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

[0067] The source coding process intercepts the maximum significant bits of each piece of data to be transmitted, transmits the significant bits, and does not transmit the insignificant bits, thereby improving the communication efficiency; through convolutional coding, the errors in data interaction can be controlled, having a certain error correction ability, improving the anti-interference ability of data transmission, and increasing the reliability of data transmission; through symbol repetition processing, each symbol is continuously repeated and transmitted the same number of times, and the digital signals of the repeated symbols are superimposed at the receiving end, reducing the channel random interference introduced during data transmission, improving the anti-interference ability of data transmission, and increasing the reliability of data transmission; thus, the radio electromagnetic wave can be transmitted more efficiently, stably, and reliably while drilling.

[0068] As Figure 4 , Figure 5 and Figure 6 shown, in this embodiment, the first transmission processing module includes a first source coding sub-module, a first convolutional coding sub-module, a first frame generation sub-module, a first symbol repetition sub-module, and a first digital modulation sub-module, and the first reception processing module includes a first band-pass filtering sub-module, a first decimation filtering sub-module, a first frame synchronization sub-module, a first symbol decoding sub-module, a first convolutional decoding sub-module, and a first source decoding sub-module;

[0069] Each of the first source coding sub-module, the first convolutional coding sub-module, the first frame generation sub-module, the first symbol repetition sub-module, the first digital modulation sub-module, the first band-pass filtering sub-module, the first decimation filtering sub-module, the first frame synchronization sub-module, the first symbol decoding sub-module, the first convolutional decoding sub-module, and the first source decoding sub-module includes a plurality of processing channels;

[0070] For each processing channel in the first source coding sub-module, 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 convolutional coding sub-module, it is used to perform convolutional coding processing on the first source bit stream to obtain a first convolutional code bit stream; for each processing channel in the first frame generation sub-module, it is used to generate a first frame bit stream based on the first convolutional code bit stream; for each processing channel in the first symbol repetition sub-module, 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 sub-module, it is used to perform digital modulation on the downhole transmission bit stream to generate a first modulated data stream; the downhole transceiver 14 is further used to generate a first-phase shift modulation signal with a first power based on a plurality of the first modulated data streams and send the first-phase shift modulation signal to the second reception processing module;

[0071] The second transmission processing module includes a second source coding sub-module, a second convolutional coding sub-module, a second frame generation sub-module, a second symbol repetition sub-module, and a second digital modulation sub-module. The second reception processing module includes a second band-pass filtering sub-module, a second decimation filtering sub-module, a second frame synchronization sub-module, a second symbol decoding sub-module, a second convolutional decoding sub-module, and a second source decoding sub-module;

[0072] The second source coding sub-module, the second convolutional coding sub-module, the second frame generation sub-module, the second symbol repetition sub-module, the second digital modulation sub-module, the second band-pass filtering sub-module, the second decimation filtering sub-module, the second frame synchronization sub-module, the second symbol decoding sub-module, the second convolutional decoding sub-module, and the second source decoding sub-module each include a plurality of processing channels;

[0073] The ground transceiver is further configured to convert the first phase shift modulation signal into a first digital signal; for each processing channel in the second band-pass filtering sub-module, perform digital filtering calculations on the first digital signal to obtain a first digital modulation signal; for each processing channel in the second decimation filtering sub-module, 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 sub-module, 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 sub-module, perform symbol decoding processing on the first symbol demodulation data stream after data frame synchronization; for each processing channel in the second convolutional decoding sub-module, perform convolutional 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 sub-module, 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 sub-module, it is used to perform source coding processing on the second initial data to obtain a second source bitstream; for each processing channel in the second convolutional coding sub-module, it is used to perform convolutional coding processing on the second source bitstream to obtain a second convolutional code bitstream; for each processing channel in the second frame generation sub-module, it is used to generate a second frame bitstream based on the second convolutional code bitstream; for each processing channel in the second symbol repetition sub-module, it is used to perform symbol repetition processing on the second frame bitstream to obtain a ground transmission bitstream; for each processing channel in the second digital modulation sub-module, it is used to perform digital modulation on the ground transmission bitstream to generate a second modulated data stream; the ground transceiver is further used to generate a second-phase shift modulation signal with a second power based on a plurality of the second modulated data streams and send the second-phase shift modulation signal to the first receiving processing module;

[0075] The downhole transceiver 14 is further used to convert the second-phase shift modulation signal into a second digital signal; for each processing channel in the first band-pass filtering sub-module, 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 decimation filtering sub-module, 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 sub-module, 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 sub-module, 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 convolutional decoding sub-module, it is used to perform convolutional decoding processing on the data after symbol decoding processing to obtain the second source bitstream; for each processing channel in the first source decoding sub-module, it is used to perform source decoding processing on the second source bitstream to obtain the second initial data and send the second initial data to the downhole measurement device.

[0076] As Figures 4 to 6 shown, at the current time period, if it is necessary to turn on the sending function of the downhole transceiver system 1, turn off the receiving function of the downhole 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 further includes a first sending interface, and the first sending interface is communicatively connected to the downhole measurement device and is used to receive the first initial data sent by the downhole measurement device;

[0078] The first source coding sub-module may include multiple processing channels UDL1 to UDLn. The first initial data is allocated to the multiple processing channels in the first source coding sub-module. For each processing channel in the first source coding sub-module, a CRC check code is added to the first initial data corresponding to this processing channel, and the data frame content can be generated. The most significant bits of the data frame content corresponding to this processing channel are intercepted to generate the first source bit stream;

[0079] The first convolutional coding sub-module may include multiple processing channels UDL1 to UDLn. Each first source bit stream enters the processing channel of the first convolutional coding sub-module corresponding to it. For each processing channel in the first convolutional coding sub-module, convolutional coding is performed on the first source bit stream corresponding to this processing channel to generate the first convolutional code bit stream;

[0080] The first frame generation sub-module may include multiple processing channels UDL1 to UDLn. Each first convolutional code bit stream enters the processing channel of the first frame generation sub-module corresponding to it. For each processing channel in the first frame generation sub-module, a 13-bit binary Barker code 0b1111100110101 for frame synchronization is added to the front of the first convolutional code bit stream corresponding to this processing channel to generate the first frame bit stream;

[0081] The first symbol repetition sub-module may include multiple processing channels UDL1 to UDLn. Each first frame bit stream enters the processing channel of the first symbol repetition sub-module corresponding to it. For each processing channel in the first symbol repetition sub-module, each symbol of the first frame bit stream corresponding to this processing channel is continuously repeated the same number of times to generate the downhole transmission bit stream;

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

[0083] The second band-pass filtering sub-module may include multiple processing channels Uf1 to Ufn. The first digital signal is connected to each processing channel of the second band-pass filtering sub-module for digital filtering calculation, and the first digital modulation signals of Uf1 to Ufn multiplexed channels can be separated from the multiplexed digital signals;

[0084] The second extraction and filtering sub-module may include multiple processing channels Uf1 to Ufn. Each first digital modulation signal enters the processing channel of its corresponding second extraction and filtering sub-module. For each processing channel in the second extraction and filtering sub-module, the first digital modulation signal corresponding to this processing channel is filtered to obtain a first sampled data stream at k times the rate of the BPSK signal corresponding to this processing channel;

[0085] The second frame synchronization sub-module may include multiple processing channels UDL1 to UDLn. Each first sampled data stream enters the processing channel of its corresponding second frame synchronization sub-module. For each processing channel in the second frame synchronization sub-module, the first sampled data streams with a front-to-back interval of k data bits are added together to obtain a first symbol demodulation data stream at k times the frequency of the BPSK signal. Based on a preset correlation calculation formula, continuous Pearson correlation calculations are performed on the first symbol demodulation data stream and the 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. After obtaining that the Pearson correlation coefficient is greater than the set threshold, the maximum value of k correlation coefficients is obtained. This maximum value is the frame synchronization point and also the starting position of the first symbol;

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

[0087]

[0088] where r represents the Pearson correlation coefficient, X i represents the i-th sampled value (or the value after a certain preprocessing) in the received signal sequence, and Y i represents the i-th value in the known Barker code frame header BPSK modulation signal.

[0089] The second symbol decoding sub-module may include multiple processing channels UDL1 to UDLn. Each first symbol demodulation data stream after data frame synchronization enters the processing channel of its corresponding second symbol decoding sub-module. For each processing channel in the second symbol decoding sub-module, based on a preset correlation calculation formula, continuous k first symbol demodulation data in the first symbol demodulation data stream are respectively used to perform Pearson correlation coefficient calculations 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 of symbol 0 with a length of k, and Y1 is a BPSK digital modulation signal of symbol 1 with a length of k;

[0090] The second convolutional decoding sub-module may include multiple processing channels UDL1 to UDLn. After the data obtained by decoding each symbol is processed, it enters the corresponding processing channel of the second convolutional decoding sub-module. When any one of the processing channels in the second convolutional decoding sub-module receives a complete frame of symbols, convolutional decoding calculation is performed to obtain the first source bit stream;

[0091] The second source decoding sub-module may include multiple processing channels UDL1 to UDLn. Each first source bit stream enters the corresponding processing channel of the second source decoding sub-module. For each processing channel in the second source decoding sub-module, the first initial data is restored according to the agreed data truncation rule. In this embodiment, the second receiving processing module further includes a second receiving interface, which is communicatively connected to the PC 3. Through the second receiving interface, the first initial data can be sent to the PC 3.

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

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

[0094] The second source encoding sub-module may include multiple processing channels DDL1 to DDLn. The second initial data is allocated to the multiple processing channels in the second source encoding sub-module. For each processing channel in the second source encoding sub-module, a CRC check code is added to the second initial data corresponding to this processing channel, the data frame content can be generated, and the maximum valid bits of the data frame content corresponding to this processing channel are intercepted to generate the second source bit stream;

[0095] The second convolutional encoding sub-module may include multiple processing channels DDL1 to DDLn. Each second source bit stream enters the corresponding processing channel of the second convolutional encoding sub-module. For each processing channel in the second convolutional encoding sub-module, convolutional encoding is performed on the second source bit stream corresponding to this processing channel to generate the second convolutional code bit stream;

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

[0097] The second symbol repetition sub-module may include multiple processing channels DDL1 to DDLn. Each second frame bitstream enters the corresponding processing channel of the second symbol repetition sub-module. For each processing channel in the second symbol repetition sub-module, each symbol of the second frame bitstream corresponding to this processing channel is continuously repeated the same number of times to generate a ground transmission bitstream;

[0098] The second digital modulation sub-module may include multiple processing channels DDL1 to DDLn. Each downhole transmission bitstream enters the corresponding processing channel of the second digital modulation sub-module. For each processing channel in the second digital modulation sub-module, the second transmission bitstream corresponding to this processing channel is digitally modulated according to the BPSK modulation mode to generate a second modulated data stream carrying bitstream information. The ground transceiver generates a second phase shift modulation signal with a second power based on multiple second modulated data streams. The second phase shift modulation signal may be a BPSK signal with increased power;

[0099] The first band-pass filtering sub-module may include multiple processing channels Df1 to Dfn. The second digital signal is connected to each processing channel of the second band-pass filtering sub-module for digital filtering calculation, and Df1 to Dfn multiplexed second digital modulation signals can be separated from the multiplexed digital signals;

[0100] The first decimation filtering sub-module may include multiple processing channels Df1 to Dfn. Each second digital modulation signal enters the corresponding processing channel of the first decimation filtering sub-module. For each processing channel in the first decimation filtering sub-module, the second digital modulation signal corresponding to this processing channel is filtered to obtain a second sampled data stream with a k-fold rate of the BPSK signal corresponding to this processing channel;

[0101] The first frame synchronization sub-module may include multiple processing channels DDL1 to DDLn. Each second sampled data stream enters the corresponding processing channel of the first frame synchronization sub-module. For each processing channel in the first frame synchronization sub-module, the second sampled data streams with a k-data-bit interval before and after are added to obtain a second symbol demodulation data stream with a frequency of k-fold BPSK signal. Based on a preset correlation calculation formula, continuous Pearson correlation calculations are performed on the second symbol demodulation data stream and the pre-stored digital modulation signal YH. After the Pearson correlation coefficient is greater than the set threshold, the maximum value of k correlation coefficients is obtained. This maximum value is the frame synchronization point and also the starting position of the first symbol;

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

[0103] The first convolutional decoding sub-module may include multiple processing channels DDL1 to DDLn. After each symbol decoding process, the data enters the corresponding processing channel of the first convolutional decoding sub-module. When any one of the processing channels in the first convolutional decoding sub-module receives a complete frame of symbols, convolutional decoding calculation is performed to obtain the second source bit stream;

[0104] The first source decoding sub-module may include multiple processing channels DDL1 to DDLn. Each second source bit stream enters the corresponding processing channel of the first source decoding sub-module. For each processing channel in the first source decoding sub-module, the second initial data is restored according to the agreed data truncation rule. In this embodiment, the first receiving processing module further includes a first receiving interface, and the first receiving interface is communicatively connected to the downhole measurement device. Through the first receiving interface, the second initial data can be sent to the downhole measurement device.

[0105] In this embodiment, the electromagnetic wave while-drilling multi-channel bidirectional transmission system adopts multi-frequency simultaneous transceiver to realize the simultaneous reception and transmission of multi-frequency signals, improving the communication flexibility and efficiency and the utilization rate of the channel. By adopting CRC check during data transmission, it can effectively detect whether errors occur during data transmission. By adopting Barker code as the frame synchronization header, the accuracy of frame synchronization detection is improved. By adopting the digital band-pass filter corresponding to the band-pass filtering sub-module, signals outside the channel are filtered out, and the carrier digital signals of each channel can be separated. By adopting the decimation filter corresponding to the decimation filtering sub-module, the carrier data stream of each channel can be decelerated to a low-speed data stream with a k-fold frequency of the symbol frequency, improving the reliability of the carrier signal. By adopting the method of the maximum Pearson correlation coefficient to calculate the frame synchronization and symbol information, and the optimal symbol synchronization data position can be adjusted.

[0106] In this embodiment, the first sending processing module further includes a first multiplexing sub-module and a first transmission control sub-module. The downhole transceiver 14 further includes a first analog circuit module. The second sending processing module further includes a second multiplexing sub-module and a second transmission control sub-module. The ground transceiver further includes a second analog circuit module;

[0107] The first multiplexing sub-module is configured to add up each first modulated data stream to generate a first transmission waveform control data stream; the first transmission control sub-module is configured to control the first analog circuit module to generate the first phase-shift modulation signal with the first power based on the first transmission waveform control data stream;

[0108] The second multiplexing sub-module is configured to add up each second modulated data stream to generate a second transmission waveform control data stream; the second transmission control sub-module is configured to control the second analog circuit module to generate the second phase-shift modulation signal with the second power based on the second transmission waveform control data stream.

[0109] Through the first multiplexing sub-module and the second multiplexing sub-module, multiple modulated data streams can be added up 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 sub-module and the second transmission control sub-module control the analog circuit module to generate a phase-shift modulation signal based on the transmission waveform control data stream, so as to provide 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 switching power supply sub-module and a first feedback protection sub-module. The third analog circuit module includes a plurality of first amplification sub-modules, a plurality of first hardware filtering sub-modules, and a plurality of first analog-to-digital conversion sub-modules;

[0111] The surface transceiver further includes a fourth analog circuit module. The second analog circuit module includes a second digital switching power supply sub-module and a second feedback protection sub-module. 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 sub-module is configured to adjust the first output voltage of the first digital switching power supply sub-module based on the first transmission waveform control data stream, so as to generate the first phase-shift modulation signal with the first power based on the adjusted first output voltage; the first feedback protection sub-module is configured to detect the first operating parameter of the first digital switching power supply sub-module and feedback the first operating parameter to the first transmission control sub-module, so that the first transmission control sub-module adjusts the first output voltage based on the first operating parameter;

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

[0114] The second transmission control sub-module is configured to adjust the second output voltage of the second digital switching power supply sub-module based on the second transmission waveform control data stream, so as to generate the second phase shift modulation signal with the second power based on the adjusted second output voltage; the second feedback protection sub-module is configured to detect the second operating parameter of the second digital switching power supply sub-module and feed back the second operating parameter to the second transmission control sub-module, so that the second transmission control sub-module adjusts the second output voltage based on the second operating parameter;

[0115] For each of the first amplification sub-modules, the first amplification sub-module is configured to amplify the second phase shift modulation signal; for each of the first hardware filtering sub-modules, the first hardware filtering sub-module is configured to perform hardware filtering on the amplified second phase shift modulation signal; for each of the first analog-to-digital conversion sub-modules, the first analog-to-digital conversion sub-module is configured to convert the second phase shift modulation signal after hardware filtering into the second digital signal.

[0116] In this embodiment, the first analog circuit module further includes a first transmission switch, the third analog circuit module further includes a first reception switch, the second analog circuit module further includes a second transmission switch, and the fourth analog circuit module further includes a second reception switch. When the downhole transceiver system 1 serves as the transmitter and the surface transceiver system 2 serves as the receiver, the first transmission switch and the second reception switch are turned on, and the first reception switch and the second transmission switch are turned off.

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

[0118] The digital switching power supply sub-module is the digital switching power supply. By using the digital switching power supply as the power amplifier for underground emission, the power loss during underground emission is reduced, and at the same time, the temperature rise of the underground transceiver 14 is reduced.

[0119] Through the underground antenna 12, the second phase shift modulation signal can be connected to multiple first amplification sub-modules for signal amplification. The outputs of multiple pre-stage first amplification sub-modules of the underground receiver are respectively connected to their corresponding first hardware filtering sub-modules for hardware filtering. The output signals of multiple first hardware filtering sub-modules of the underground receiver are respectively connected to their corresponding first analog-to-digital conversion sub-modules. The first reception processing module further includes a first adder, and the data output by multiple first analog-to-digital conversion sub-modules are digitally added in the first adder to obtain a second digital signal.

[0120] Through the ground antenna, the first phase shift modulation signal can be connected to multiple second amplification sub-modules for signal amplification. The outputs of multiple pre-stage second amplification sub-modules of the underground receiver are respectively connected to their corresponding second hardware filtering sub-modules for hardware filtering. The output signals of multiple second hardware filtering sub-modules of the ground receiver are respectively connected to their corresponding second analog-to-digital conversion sub-modules. The second reception processing module further includes a second adder, and the data output by multiple second analog-to-digital conversion sub-modules are digitally added in the second adder to obtain a first digital signal.

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

[0122] Based on the same inventive concept, an embodiment of this application further provides an electromagnetic wave multi-channel bidirectional transmission method while drilling. This method can be executed by a device, which can be a server or a terminal device. 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] An electromagnetic wave multi-channel bidirectional transmission method while drilling, with an electronic device as the execution subject, the main process of the method is described as follows:

[0124] Based on a preset target correspondence relationship, obtain the transceiver function switch states of the downhole transceiver system and the surface transceiver system corresponding to the current time period. The target correspondence relationship is the correspondence relationship between multiple different time periods and the transceiver function switch states of the downhole transceiver system and the surface transceiver system respectively; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the surface transceiver system includes a surface transceiver and a surface antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first transmission processing module and a first reception processing module; the surface transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module;

[0125] In the current time period, if the transmission function of the downhole transceiver system is turned on, the reception function of the downhole transceiver system is turned off, the transmission function of the surface transceiver system is turned off, and the reception function of the surface transceiver system is turned on, then control the first transmission processing module to receive the first initial data sent by the downhole measurement device, perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and based on the downhole antenna and the surface antenna, send the processed data to the second reception processing module; and control the second reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively, and send the processed data to the PC;

[0126] During the current 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 surface transceiver system is turned on, and the receiving function of the surface transceiver system is turned off, then control the second sending processing module to receive the second initial data sent by the PC, perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and based on the surface antenna and the downhole antenna, send the processed data to the first receiving processing module; and control the first receiving processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second sending processing module respectively, and send the processed data to the downhole measuring device.

[0127] In this embodiment, the control for the first sending processing module to receive the first initial data sent by the downhole measuring device and perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively includes:

[0128] Perform source coding processing on the first initial data to obtain a first source bit stream; perform convolutional coding processing on the first source bit stream to obtain a first convolutional code bit stream; generate a first frame bit stream based on the first convolutional code bit stream; perform symbol repetition processing on the first frame bit stream to obtain a downhole transmission bit stream, perform digital modulation on the downhole transmission bit stream to generate a first modulated data stream, generate a first-phase shift modulation signal with a first power based on the first modulated data stream, and send the first-phase shift modulation signal to the second receiving processing module;

[0129] The control for the second receiving processing module to perform symbol decoding processing, convolutional 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 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 convolutional 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 control for the second sending processing module to receive the second initial data sent by the PC and perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively includes:

[0132] Perform source coding on the second initial data to obtain a second source bitstream; perform convolutional coding on the second source bitstream to obtain a second convolutional code bitstream; generate a second frame bitstream based on the second convolutional code bitstream; perform symbol repetition on the second frame bitstream to obtain a ground transmission bitstream, so as to perform digital modulation on the ground transmission bitstream to generate a second modulated data stream, generate a second-phase shift modulation signal with a second power based on the second modulated data stream, and send the second-phase shift modulation signal to the first receiving processing module;

[0133] The controlling the first receiving processing module to perform symbol decoding, convolutional decoding, and source decoding 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 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 on the second symbol demodulation data stream after data frame synchronization; perform convolutional decoding on the data after symbol decoding to obtain the second source bitstream; perform source decoding on the second source bitstream to obtain the second initial data, and send the second initial data to the downhole measurement device.

[0135] In this embodiment, the performing source coding on the first initial data to obtain a first source bitstream includes: allocating the first initial data to multiple processing channels of a first source coding sub-module, and for each processing channel in the first source coding sub-module, adding a CRC check code to the first initial data corresponding to this processing channel to generate data frame content; for each processing channel in the first source coding sub-module, intercepting the most significant bits of the data frame content corresponding to this processing channel to obtain the first source bitstream.

[0136] The performing source coding on the second initial data to obtain a second source bitstream includes: allocating the second initial data to multiple processing channels of a second source coding sub-module, and for each processing channel in the second source coding sub-module, adding a CRC check code to the second initial data corresponding to this processing channel to generate data frame content; for each processing channel in the second source coding sub-module, intercepting the most significant bits of the data frame content corresponding to this processing channel to obtain the second source bitstream.

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

[0138] An acquisition module, configured to obtain the transceiver function switch states of the downhole transceiver system and the surface transceiver system corresponding to the current time period based on a preset target correspondence relationship, where the target correspondence relationship is the correspondence relationship between multiple different time periods and the transceiver function switch states of the downhole transceiver system and the surface transceiver system respectively; the downhole transceiver system includes a downhole transceiver and a downhole antenna, and the surface transceiver system includes a surface transceiver and a surface antenna; the downhole transceiver includes a first digital signal processing module, and the first digital signal processing module includes a first transmission processing module and a first reception processing module; the surface transceiver includes a second digital signal processing module, and the second digital signal processing module includes a second transmission processing module and a second reception processing module;

[0139] A first control module, configured to, in the current time period, if the transmission function of the downhole transceiver system is turned on, the reception function of the downhole transceiver system is turned off, the transmission function of the surface transceiver system is turned off, and the reception function of the surface transceiver system is turned on, control the first transmission processing module to receive the first initial data sent by the downhole measurement device, perform source coding processing, convolutional coding processing, and symbol repetition processing on the first initial data respectively, and send the processed data to the second reception processing module based on the downhole antenna and the surface antenna; and control the second reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the first transmission processing module respectively, and send the processed data to the PC.

[0140] A second control module, configured to, in the current time period, if the transmission function of the downhole transceiver system is turned off, the reception function of the downhole transceiver system is turned on, the transmission function of the surface transceiver system is turned on, and the reception function of the surface transceiver system is turned off, control the second transmission processing module to receive the second initial data sent by the PC, perform source coding processing, convolutional coding processing, and symbol repetition processing on the second initial data respectively, and send the processed data to the first reception processing module based on the surface antenna and the downhole antenna; and control the first reception processing module to perform symbol decoding processing, convolutional decoding processing, and source decoding processing on the data sent by the second transmission processing module respectively, and send the processed data to the downhole measurement device.

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

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

[0143] Among them, 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 electromagnetic wave measurement-while-drilling multi-path bidirectional transmission method; the memory 102 is used to store various types of data to support the operation of the electronic device 100. These data may include, for example, instructions for any application or method operating on the electronic device 100, and application-related data. 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 (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, a magnetic disk, or an optical disk, or one or more of them.

[0144] The I / O interface 103 provides an interface between the processor 101 and other interface modules. The above other interface modules can be a keyboard, a mouse, 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. Therefore, the corresponding communication component 104 may include: a Wi-Fi component, a Bluetooth component, an NFC component.

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

[0146] The electronic device 100 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components, and is used to execute the steps of the electromagnetic wave while-drilling multi-channel bidirectional transmission method given in the above embodiments.

[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 a server, etc.

[0148] Based on the same technical concept, the present application further 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 electromagnetic wave while-drilling multi-channel bidirectional transmission method are implemented.

[0149] The computer-readable storage medium may include various media capable of storing program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0150] The term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0151] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0152] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions 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, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[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 should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to 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 symbol decoding processing, convolution decoding processing and source decoding processing on the data sent by the second sending processing module under a second condition corresponding to the current time period, and send the processed data to the downhole measurement equipment, wherein 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; 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 second sending processing module includes a second 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 source decoding submodule.

2. The electromagnetic wave multi-channel bidirectional transmission system while drilling according to claim 1, characterized in that: 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 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; 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; 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.

6. The electromagnetic wave multi-channel bidirectional transmission method while drilling according to claim 5, 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.

7. 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; 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; 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 second sending processing module includes a second 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 source decoding submodule.

8. 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 a computer program stored in the memory so that the electronic device executes the method according to any one of claims 5 or 6.

9. 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 or 6.

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