CN113708848B - An elastic guided wave wireless communication system based on underground pipes - Google Patents

Abstract

The invention relates to the field of pipeline wireless communication, in particular to an elastic guided wave wireless communication system and method based on an underground pipeline, which are characterized in that: the system at least comprises an above-ground communication unit (2) and an underground communication unit (1); the underground communication unit (1) comprises a first control unit (3), an annular transducer (4), a pipeline (5), a strip-shaped transducer (6), a wireless signal sending unit (7), a sensor group (31) and a first control unit microcontroller (32); the above-ground communication unit (2) comprises: a wireless signal transmission unit (7), an antenna (8), and a second control unit (9). The method can conveniently communicate multiple sections of underground pipelines connected by spiral joints or welded seamlessly, finally establish a full-wireless underground pipeline communication network, and solve the detection and communication in the pipeline transmission of flammable and explosive resources.

Description

An elastic guided wave wireless communication system based on underground pipes

technical field

The invention relates to the field of pipeline wireless communication, in particular to an elastic guided wave wireless communication system and method based on an underground pipeline, which is suitable for long-distance underground pipeline signals with multiple pipeline interfaces or seamless welding through elastic guided waves on the inner wall of the pipeline. Transport implements piped communication.

Background technique

In the case of solving the uneven distribution of resources in various regions, the pipeline transportation method is the main method. With the advent of the digital age, it is necessary to transmit the working condition data inside the pipeline to the monitoring center in real time during the pipeline work process, so as to facilitate the operation of the staff in the next step. From the current situation, the pipeline signal transmission mostly adopts wired or wireless communication mode, and the working condition data inside the pipeline is sent to the pipeline monitoring center in real time. Both wireless communication and wired communication transmit signals through electromagnetic waves, but for the transmission of some flammable and explosive oil and gas resources such as natural gas and liquefied gas, electromagnetic fields cannot be used to transmit signals, which will cause electric field ignition and easily cause fires. Therefore, in some natural gas and liquefied gas environments, electromagnetic fields are not used to transmit signals.

Therefore, the improvement of the elastic guided wave wireless communication system based on the underground pipeline can be carried out from three aspects: (1) The communication channel of the elastic guided wave wireless communication system based on the underground pipeline is the pipeline. Compared with other communication systems that need to build a network environment underground, the pipeline as a communication channel does not have high requirements for the network environment, and the signal transmission is more stable and reliable. (2) The elastic guided wave on the inner wall of the pipeline is used as the underground transmission signal. First of all, compared with the underground wireless 4G, wifi and other microwave signals, the signal attenuation is very strong during the pipeline transmission process, while the elastic guided wave on the inner wall of the pipeline is used as the underground pipeline transmission signal in the pipeline with fast propagation speed, low attenuation, and long-distance transmission. good for communication. Secondly, the elastic guided wave on the inner wall of the pipeline is used as an underground pipeline to transmit signals, and there will be no electromagnetic field around the pipeline, which avoids the phenomenon of electromagnetic ignition. As a transmission signal, elastic guided wave solves the problem of environmental limitations of liquefied gas and natural gas, and has the advantages of reducing equipment cost, and has become a current research hotspot. (3) The elastic guided wave on the inner wall of the pipeline received by the other end of the pipeline is sent through the antenna, and the signal is received on the LCD screen of the monitoring end, and the working conditions of the pipeline are watched in real time, so as to realize the wireless communication above and below the ground.

For the transmission and reception of elastic waves on the inner wall of the pipeline during the communication process of the underground pipeline, it can oscillate according to the resonance of the piezoelectric crystal, that is, the piezoelectric effect. If an electric field is applied around the piezoelectric ceramic material, the piezoelectric ceramic material itself will produce small deformation, which is the process of converting electrical energy into mechanical energy, which can be used for the transmission of elastic guided wave signals on the inner wall of the pipeline. Piezoelectric ceramics are relatively sensitive to pressure. When a force is applied to the surface of the piezoelectric ceramic material, an electric charge will be generated on the surface of the piezoelectric ceramic material. This is the process of converting mechanical energy into electrical energy. This process can be used for elastic guided waves on the inner wall of the pipeline. reception of the signal. Then, by analyzing and processing the received elastic guided wave signal on the inner wall of the pipeline, the purpose of wireless signal transmission in the underground pipeline can be achieved.

At present, the research technology of multi-section underground pipeline wireless communication system is only limited to theoretical research, lack of research on system design, and there is no better solution for the coupling between ultrasonic transducer and medium. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an elastic guided wave wireless communication system and method based on underground pipelines, so as to be able to communicate with multiple underground pipelines connected by screw joints or seamlessly welded, and finally establish a fully wireless above-ground and underground pipeline communication network , to solve the detection and communication in pipeline transmission of flammable and explosive resources.

The purpose of the present invention is to achieve in this way, an elastic guided wave wireless communication system based on an underground pipeline, at least comprising an above-ground communication unit and an underground communication unit;

The underground communication unit includes a first control unit, a ring transducer, a pipeline, a bar transducer, a wireless signal sending unit, a sensor group, and a first control unit microcontroller;

The ground communication unit includes: a wireless signal sending unit, an antenna, and a second control unit;

The first control unit microcontroller collects the pipeline information to be transmitted by acquiring the sensor group, and sends the elastic guided wave to the inner wall of the pipeline by controlling the annular transducer, so as to convert the electrical signal information of the first control unit microcontroller into high-frequency signals. The mechanical wave of radial vibration of the pipeline is transmitted on the pipeline in the form of elastic wave;

The bar-shaped transducer array at the other end of the pipeline is used as an acousto-electric transducer for receiving elastic guided waves on the inner wall of the pipeline, and the electrical signals generated by the acoustic-electric transducer are wirelessly sent to the second control unit by the wireless signal sending unit and the antenna. Reading; the signal processing circuit and demodulation link of the second control unit, finally realize wireless communication between the underground pipeline environmental information and internal information through the external antenna of the ground communication unit, and the second control unit microcontroller displays the information on the LCD screen On the display unit, the network communication of all-wireless above-ground and underground pipelines is realized;

The annular transducer is used as an acoustic-electric transducer for transmitting elastic guided waves on the inner wall of the pipeline, and converts the electrical signal information of the first control unit into high-frequency radial vibration mechanical waves of the pipeline, which are transmitted in the pipeline in the form of elastic waves; The device array is used as an acoustoelectric transducer for receiving the elastic guided waves on the inner wall of the pipeline, and the acoustic and electrical transducers and the wireless signal sending unit receive the elastic guided waves on the inner wall of the pipeline and convert them into electrical signals; Finally, the environmental information and internal information of the underground pipeline are displayed on the LCD screen to realize the full wireless communication of the above-ground and underground pipeline network.

The ground communication unit at least includes: an antenna, a second unit power supply module, a second unit bandpass filter, a second unit power amplifier, an ADC conversion circuit, a signal demodulation, a second control unit micro-control unit and a display unit; The second unit power supply module supplies the voltage required by the second unit band-pass filter, the second unit power amplifier, the signal demodulation, the ADC conversion circuit, the second control unit micro-control unit and the display unit, and the antenna transmits the received wireless information through the The second unit band-pass filter filters, and then the signal is amplified by the second unit power amplifier, demodulated by the signal, and converted into a digital signal by the ADC conversion circuit after demodulation, and the digital signal is passed through the second control unit Micro-control unit After processing, the display unit finally displays the temperature and humidity of the environment where the underground pipeline is located, as well as the internal information of the pipeline, such as the fluid velocity inside the pipeline, the liquid level of the fluid, and the pressure inside the pipeline.

The first control unit includes at least a sensor group, a first control unit microcontroller, a first unit power supply module, a signal amplifier circuit, a signal filter circuit, a nonlinear correction circuit, a signal conversion circuit, a first signal processing unit, a band Pass filter, power amplifier circuit; sensor group, first control unit microcontroller, first unit power supply module, signal amplifier circuit, signal filter circuit, nonlinear correction circuit, signal conversion circuit, first signal processing unit, band-pass The filter and the power amplifier circuit are electrically connected in sequence; the information collected by the sensor group passes through the electrically connected signal amplifier circuit, signal filter circuit, nonlinear correction circuit, and signal conversion circuit in sequence to the first signal processing unit, and the first signal processing unit Perform signal demodulation to convert various measured physical quantities of the sensor group into packaged electrical signals, which are converted into a certain frequency by a power amplifier circuit and a band-pass filter, and an electrical signal with a certain amplitude drives the ring transducer to work.

The wireless signal transmission unit at least includes a wireless signal transmission power module, a wireless transmission signal processor, a signal modulation unit and a power output circuit. The frequency of the pipeline elastic guided wave transmission is generally a low-frequency signal, so the wireless transmission signal processor is required to convert the signal. It is modulated into a frequency suitable for terrestrial wireless communication by the signal modulation unit, and finally the power output circuit drives the antenna for wireless transmission.

The band-pass filter is designed to be suitable for the frequency band of pipeline elastic wave transmission, and filters out the clutter in other frequency bands. The band-pass filter includes: a band-pass filter and a second-unit band-pass filter.

The electrical signal suitable for transmission of elastic waves in pipelines is a low-frequency signal whose frequency band is 20KHz-50KHz, which is converted into mechanical waves of radial vibration of pipelines.

The power amplifier circuit is used to amplify the power required for the conversion of the acoustic-electric transducer, and its power is to transmit information from one end of the pipe to the other end of the pipe, and the ring-shaped transducer is used as the acoustic-electric transducer for transmitting elastic guided waves on the inner wall of the pipe. The transducer, the strip transducer array, is used as the required power for the acoustic-electric transducer that receives the elastic guided waves on the inner wall of the pipe.

An elastic guided wave wireless communication method based on an underground pipeline, the first step: acquiring the pipeline model electrical information of the fluid velocity inside the pipeline, the fluid level, and the pressure inside the pipeline by a sensor group;

The second step: filter, amplify and digitally process the signal of the first step by the first control unit;

The third step: packing the above-mentioned internal fluid velocity, fluid level, and internal pressure of the pipeline according to classification;

Step 4: Amplify the power of the packaged signal, drive the annular transducer, and stimulate the transmitting acoustic and electrical transducer to generate elastic guided waves on the inner wall of the pipeline;

Step 5: The bar-shaped transducer receives the acoustic and electrical transducer to receive the elastic guided wave on the inner wall of the pipeline sent from the sending end;

The sixth step: wirelessly send to the ground processor through the ground communication unit 2;

Step 7: The ground processor unpacks the received information, and displays it on the terminal display.

The internal fluid velocity, fluid level, and internal pressure of the pipeline are packaged by classification, which is the data arranged in byte order. How many bytes are the internal fluid velocity, fluid level, and internal pressure of the pipeline, including the check digit.

The advantages of the present invention are:

The invention provides an underground pipeline with multiple sections connected by screw joints or welded seamlessly. The optimal frequency range for the transmission of elastic guided waves on the inner wall of the pipeline is obtained through finite element modeling and analysis, and the analog or digital signals are conditioned and processed through signal conditioning and processing. The circuit is loaded to the transducer. Send and receive the guided wave on the inner wall of the pipeline within the frequency range, and realize the underground wireless communication of the pipeline through a series of signal conditioning such as filtering and amplifying the received elastic guided wave on the inner wall of the pipeline. After the wireless signal sending unit modulates the piezoelectric signal, the wireless signal sending unit completes the free-space wireless signal transmission, and the second control unit microcontroller receives the free-space wireless signal, performs signal processing, and demodulates the pipeline information. Send it to the LCD screen for display, and finally establish a fully wireless above-ground and underground pipeline communication network. In the present invention, the underground pipeline is not based on wireless or wired communication based on electromagnetic waves, but realizes wireless communication through elastic guided waves on the inner wall of the pipeline. For the transmission industry, the system has important practical significance and is a very valuable research.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings of the embodiments:

Fig. 1 is the wireless communication system diagram of the present invention based on the elastic guided wave of the underground pipeline;

Fig. 2 is the principle diagram of the first control unit of the present invention

Fig. 3 is the principle diagram of the second control unit of the present invention;

4 is a schematic diagram of a wireless signal transmission unit of the present invention;

Figure 5 is a flow chart of the signal loop of the present invention.

In the figure, 1, underground communication unit; 2, ground communication unit; 3, first control unit; 4, ring transducer; 5, pipeline; 6, bar transducer; 7, wireless signal sending unit; 8, Antenna; 9, second control unit; 31, sensor group; 32, first control unit microcontroller; 71, wireless signal processor; 72, wireless signal transmission power module; 73, signal modulation unit; 74, power output circuit; 321, first unit power supply module; 322, signal amplification circuit; 323, signal filter circuit; 324, nonlinear correction circuit; 325, signal conversion circuit; 326, first signal processing unit; 327, band-pass filter; 328, power amplifier circuit; 91, second control unit microcontroller; 92, display unit; 911, second unit power supply module; 912, second unit bandpass filter; 913, second unit power amplifier; 914, signal demodulation; 915, ADC conversion circuit; 916, second control unit micro-control unit.

Detailed ways

As shown in FIG. 1 , an elastic guided wave wireless communication system based on an underground pipeline is characterized in that: it at least includes an above-ground communication unit 2 and an underground communication unit 1;

The underground communication unit 1 includes a first control unit 3, a ring transducer 4, a pipeline 5, a bar transducer 6, a wireless signal sending unit 7, a sensor group 31, and a first control unit microcontroller 32;

The ground communication unit 2 includes: a wireless signal sending unit 7, an antenna 8, and a second control unit 9;

The first control unit microcontroller 32 collects the pipeline information to be transmitted by acquiring the sensor group 31, and controls the annular transducer 4 to send elastic guided waves to the inner wall of the pipeline 5, and transmits the electricity of the first control unit microcontroller 32. The signal information is converted into high-frequency pipeline radial vibration mechanical waves, which are transmitted on the pipeline 5 in the form of elastic waves;

The array of bar-shaped transducers 6 at the other end of the pipe 5 is used as an acousto-electric transducer for receiving elastic guided waves on the inner wall of the pipe, and the electrical signals generated by the acousto-electric transducer are wirelessly sent to The second control unit 9 reads; the signal processing circuit and the demodulation link of the second control unit 9 finally realize wireless communication with the underground pipeline environmental information and internal information through the external antenna of the underground communication unit 1, which is micro-controlled by the second control unit The device 91 displays the information on the LCD display unit 92 to realize the full wireless communication of the above-ground and underground pipeline network;

The annular transducer 4 is used as an acoustic-electric transducer for transmitting elastic guided waves on the inner wall of the pipeline, and converts the electrical signal information of the first control unit 3 into high-frequency pipeline radial vibration mechanical waves, which are transmitted on the pipeline 5 in the form of elastic waves; The array of strip transducers 6 is used as acoustoelectric transducers for receiving elastic guided waves on the inner wall of the pipeline 5. The acoustic and electrical transducers and the wireless signal sending unit receive the elastic guided waves on the inner wall of the pipeline and convert them into electrical signals; through the second control unit 9's signal processing circuit and demodulation link, and finally the underground pipeline environmental information and internal information are displayed on the LCD screen to realize full wireless above-ground and underground pipeline network communication.

As shown in FIG. 2, a schematic diagram of the first control unit 3 is given. The first control unit 3 at least includes a sensor group 31, a first control unit microcontroller 32, a first unit power supply module 321, a signal amplification circuit 322, and a signal filter. Circuit 323, nonlinear correction circuit 324, signal conversion circuit 325, first signal processing unit 326, band-pass filter 327, power amplifier circuit 328; sensor group 31, first control unit microcontroller 32, first unit power supply module 321, the signal amplification circuit 322, the signal filter circuit 323, the nonlinear correction circuit 324, the signal conversion circuit 325, the first signal processing unit 326, the band-pass filter 327, and the power amplifier circuit 328 are electrically connected in sequence; The information sequentially passes through the electrically connected signal amplification circuit 322, signal filter circuit 323, nonlinear correction circuit 324, and signal conversion circuit 325 to the first signal processing unit 326. Various physical quantities to be measured are converted into packaged electrical signals, which are converted into a certain frequency by the power amplifier circuit 328 and the band-pass filter 327, and the electric signal of a certain amplitude drives the ring transducer 4 to work. The power amplifier circuit 328 is used to amplify the power required for the conversion of the acoustic-electric transducer, and its power is to transmit information from one end of the pipe to the other end of the pipe. , the array of strip transducers 6 is used as the required power of the acoustic-electric transducer for receiving the elastic guided waves on the inner wall of the pipeline.

As shown in FIG. 3, an electrical schematic diagram of the ground communication unit 2 is given. The ground communication unit 2 at least includes: an antenna 8, a second unit power supply module 911, a second unit bandpass filter 912, a second unit power amplifier 913, ADC conversion circuit 915, signal demodulation 914, second control unit micro-control unit 916 and display unit 92; second unit power supply module 911 supplies second unit bandpass filter 912, second unit power amplifier 913, signal demodulation 914 , the voltage required by the ADC conversion circuit 915, the second control unit micro-control unit 916 and the display unit 92, the wireless information received by the antenna 8 is filtered by the second unit band-pass filter 912, and then passed through the second unit power amplifier 913. The signal is amplified, demodulated by the signal demodulation 914, and converted into a digital signal by the ADC conversion circuit 915 after demodulation. The digital signal is processed by the second control unit micro-control unit 916, and finally the display unit 92 displays the ambient temperature of the underground pipeline. Humidity, fluid velocity inside the pipeline, fluid level, pressure inside the pipeline and other internal information of the pipeline.

The band-pass filter removes clutter and effectively suppresses noise interference. The power amplifier amplifies the frequency band signal suitable for pipeline transmission, the ADC conversion chip transmits the digital signal to the processing chip for demodulation and decoding and other operations, and transmits it to the display unit, and finally all the data is displayed on the LCD screen.

As shown in FIG. 4, the schematic diagram of the wireless signal transmission unit is given. The wireless signal transmission unit at least includes a wireless signal transmission power module 72, a wireless transmission signal processor 71, a signal modulation unit 73 and a power output circuit 74. Pipeline elastic guided wave transmission The frequency of the signal is generally a low frequency signal, so the wireless transmission signal processor 71 is required to modulate the signal to a frequency suitable for terrestrial wireless communication through the signal modulation unit 73, and finally the power output circuit 74 drives the antenna 8 for wireless transmission.

As shown in Figure 5, the flow chart of the signal loop is given:

An elastic guided wave wireless communication method based on an underground pipeline, characterized in that: at least the following methods are included:

The first step: the sensor group obtains the pipeline model electrical information with a small amount of data, such as the fluid velocity inside the pipeline, the fluid level, and the pressure inside the pipeline;

The second step: filter, amplify and digitally process the signal of the first step by the first control unit;

The third step: package the above-mentioned internal fluid velocity, fluid level, and internal pressure of the pipeline according to classification; packing is the data arranged in byte order, how many bytes of internal fluid velocity, fluid level, and internal pressure of the pipeline each occupy , including the check digit.

Step 4: Amplify the power of the packaged signal, drive the annular transducer, and stimulate the transmitting acoustic and electrical transducer to generate elastic guided waves on the inner wall of the pipeline;

Step 5: The bar-shaped transducer receives the acoustic and electrical transducer to receive the elastic guided wave on the inner wall of the pipeline sent from the sending end;

The sixth step: wirelessly send to the ground processor through the ground communication unit 2;

Step 7: The ground processor unpacks the received information and displays it on the terminal display.

In the present invention, the electrical signal suitable for transmission on the pipeline is a low-frequency signal converted into a pipeline radial vibration mechanical wave whose frequency band is 20KHz-50KHz.

The internal fluid velocity, fluid level, and internal pressure of the pipeline are packaged by classification, which is the data arranged in byte order. How many bytes are the internal fluid velocity, fluid level, and internal pressure of the pipeline, including the check digit.

In the present invention, the information transmitted wirelessly is mainly the temperature and humidity of the environment where the underground pipeline is located, as well as some pipeline information with a small amount of data such as the fluid velocity inside the pipeline, the fluid level, and the pressure inside the pipeline. The transmitted pipeline information includes the temperature and humidity information of the environment where the underground pipeline is located, the fluid velocity information inside the pipeline, the fluid level information, and the internal pressure information of the pipeline; the transmitted pipeline information may amplify the signal, filter the signal, and process the nonlinear correction, and the sensor output The signal is converted into the required current or voltage form through the signal conversion link. The band-pass filter is designed to be suitable for the frequency band of the pipeline elastic wave transmission, and the clutter in other frequency bands is filtered out; the power amplifier amplifies the conversion work of the acoustic-electric transducer The power required is to transmit information from one end of the pipeline to the other end of the pipeline. The annular transducer 4 is used as the acoustic and electrical transducer to transmit the elastic guided waves on the inner wall of the pipeline, and the array of strip transducers 6 is used to receive the elasticity of the inner wall of the pipeline. The power required by the acoustic-electric transducer of the guided wave, the first control unit microcontroller excites the transmitting acoustic-electric transducer to generate elastic guided waves on the inner wall of the pipeline, and the receiving acoustic-electric transducer receives the elastic conduction of the inner wall of the pipeline sent from the sending end. Wave. The wireless signal sending unit is connected with the receiving acoustic-electric transducer, receives the electrical signal converted by it and modulates it into a signal of a certain frequency, and transmits the signal to the second control unit microcontroller through the antenna.

Components and structures not described in detail in this embodiment belong to well-known components and common structures or common means in the industry, and will not be described one by one here.

Claims (4)

1. An elastic guided wave wireless communication system based on an underground pipeline is characterized in that: it comprises at least an above-ground communication unit (2) and an underground communication unit (1); The underground communication unit (1) includes a first control unit (3), a ring-shaped transducer (4), a pipeline (5), a bar-shaped transducer (6), and a wireless signal transmission unit (7); the first A control unit (3) includes a sensor group (31) and a first control unit microcontroller (32); The ground communication unit (2) comprises: an antenna (8) and a second control unit (9); the second control unit (9) is composed of a second control unit microcontroller (91) and a liquid crystal display unit (92) )composition; The first control unit microcontroller (32) collects the pipeline information to be transmitted through the sensor group (31), and sends an elastic guided wave to the inner wall of the pipeline (5) by controlling the annular transducer (4), so as to control the first control The electrical signal information of the unit microcontroller (32) is converted into a high-frequency pipeline radial vibration mechanical wave, which is transmitted on the pipeline (5) in the form of elastic waves; The array of bar-shaped transducers (6) at the other end of the pipe (5) is used as an acoustic-electric transducer for receiving elastic guided waves on the inner wall of the pipe, and the electrical signals generated by the acoustic-electric transducer are transmitted by the wireless signal transmitting unit (7) and the antenna (8) are wirelessly sent to the second control unit (9) for reading; after signal processing is performed by the second control unit (9), the information is displayed on the LCD display unit by the second control unit microcontroller (91). (92), to realize full wireless above-ground and underground pipeline network communication. 2. An elastic guided wave wireless communication system based on an underground pipeline according to claim 1, wherein the second control unit microcontroller (91) comprises: a second unit power module (911), The second unit bandpass filter (912), the second unit power amplifier (913), the ADC conversion circuit (915), the signal demodulation (914) and the second control unit micro-control unit (916); the second unit power supply module (911) Supply the second unit bandpass filter (912), the second unit power amplifier (913), the signal demodulation (914), the ADC conversion circuit (915), the second control unit micro-control unit (916) and the display The voltage required by the unit (92), the wireless signal received by the antenna (8) is filtered by the second unit bandpass filter (912), and then the signal is amplified by the second unit power amplifier (913), and then demodulated by the signal ( 914) demodulation, after demodulation is converted into a digital signal by the ADC conversion circuit (915), the digital signal is processed by the second control unit micro-control unit (916), and finally the display unit (92) displays the temperature and humidity of the environment where the underground pipeline is located And the fluid velocity inside the pipe, the fluid level, and the pressure inside the pipe. 3. An elastic guided wave wireless communication system based on an underground pipeline according to claim 1, wherein the first control unit microcontroller (32) comprises: a first unit power supply module (321), A signal amplification circuit (322), a signal filter circuit (323), a nonlinear correction circuit (324), a signal conversion circuit (325), a first signal processing unit (326), a band-pass filter (327) and a power amplifier circuit ( 328); sensor group (31), signal amplification circuit (322), signal filter circuit (323), nonlinear correction circuit (324), signal conversion circuit (325), first signal processing unit (326), band-pass filter The sensor (327) and the power amplifier circuit (328) are electrically connected in sequence, the first unit power supply module (321) is electrically connected with the signal amplifier circuit (322); the information collected by the sensor group (31) is sequentially passed through the electrically connected signal amplifier circuit (322), a signal filter circuit (323), a nonlinear correction circuit (324), a signal conversion circuit (325) to a first signal processing unit (326), and the first signal processing unit (326) performs signal demodulation to convert the sensor The various measured physical quantities of the group (31) are converted into packaged electrical signals, which are then converted into a certain frequency by a power amplifier circuit (328) and a band-pass filter (327), and an electrical signal with a certain amplitude drives the ring transducer ( 4) Work. 4. An elastic guided wave wireless communication system based on an underground pipeline according to claim 1, characterized in that: the wireless signal sending unit (7) at least comprises a wireless signal sending power module (72), a wireless signal sending power module (72), A processor (71), a signal modulation unit (73) and a power output circuit (74), a wireless signal transmission power supply module (72), a wireless transmission signal processor (71), a signal modulation unit (73) and a power output circuit (74) ) These four parts are electrically connected in turn; the frequency of the elastic guided wave transmission in the pipeline is a low-frequency signal, so the signal output by the wireless transmission signal processor (71) needs to be modulated by the signal modulation unit (73) to a frequency suitable for wireless communication on the ground, Finally, the antenna (8) is driven by the power output circuit (74) for wireless transmission.

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