CN100395786C - Pipeline Acoustic Digital Communication System - Google Patents

Abstract

The invention relates to a pipeline acoustic wave digital communication technology. The purpose of the present invention is to obtain a larger amount of information transmission and safer and more stable data transmission without adding additional engineering workload. The system of the present invention includes an information collection substation (3) arranged at the user end, an information collection and processing master station (4) that collects and processes information from each of the information collection substations (3), and connects each of the information collection substations (3) A fluid medium delivery pipeline (5) serving as an information transmission channel between the information collection and processing master station (4), wherein the pipe wall of the pipeline is used as an information transmission medium. The invention is especially suitable for the centralized metering of the consumption of fluid media transported by various transport pipelines.

Description

Pipeline Acoustic Digital Communication System

technical field

The invention relates to a pipeline acoustic wave digital communication technology. Specifically, the present invention proposes a system and method for information communication using pipelines for transmitting various fluid media.

Background technique

In modern production and life, many fluid media transported through pipelines need to be metered, and usage fees related to the metered amount must be paid. As we all know, the manual meter reading method for statistics and charging disturbs the family life of users, and makes it necessary for companies selling and supplying fluid media to employ a large number of meter reading workers to check and charge the meters door by door, which is very important for sales of fluid media. It is obviously uneconomical for the company.

In order to solve the above problems, remote automatic metering and charging management systems for various metering instruments have been developed one after another. This type of technology is to transmit the numerical information displayed by the measuring instruments installed on the user's side to an information collection and processing center by means of remote communication, and collect and organize the collected information in the information collection and processing center. . In terms of automatic meter reading in the industrial field, the automatic meter reading system (AMR) has a history of more than ten years, and was later applied to the automatic meter reading of apartment houses. Among them, the information communication is mainly through the telephone line or optical cable communication system. For example, Fuji Electric Company of Japan installs the optical coupling adapter used on gas, water meters and other instruments between the terminal network controller and the instrument, and connects the center through the telephone line to automatically copy Meter equipment; and a distributed data acquisition and remote transmission centralized management automation network system disclosed in Chinese patent document CN1274905A and a technical solution for digital network remote transmission of meter graphic display disclosed in Chinese patent document CN1423240A. Power line carrier, such as the meter reading device developed by Hunt Company, transmits information through power line carrier. In addition, there are ways such as microwave or radio transmission to realize the information communication of the automatic meter reading system. In recent years, with the continuous development of computer network technology, the scheme of using network for data transmission has also been proposed. Yet a notable defect of above-mentioned prior art is that, either needs to set up special connection line between each household's detection and metering equipment and communication network, has the problem of digging a hole in the house pipeline that has been used like this Problems, the magnitude of the project can be imagined. Either radio or microwave transceiver equipment with a certain power needs to be set up. On the one hand, it is restricted by radio regulations. On the other hand, radio or microwave transceiver signals are often blocked and interfered by buildings, which will affect the effect of information transmission.

In the U.S. patent document US6492898B1, a technical solution for using the pipeline itself for information communication is disclosed, which converts the measurement value obtained by the detection and measurement equipment into an electrical signal, and transmits the electrical signal to the information collection and processing center through the metal pipeline. The electrical signal is processed by the information collection and processing center to realize centralized meter reading. However, in this technical solution, the pipeline must be insulated to avoid signal distortion or signal transmission failure caused by the pipeline being in contact with the ground. This not only increases the laying cost of the pipeline, but also makes it impossible to reform the existing pipeline.

In the prior art, there is also a communication method in which ultrasonic waves are used for information communication in pipelines. For example, the automatic metering system, meter and data collection device disclosed in Japanese patent document JP10-208179A, in which ultrasonic communication technology is used, and the water in the pipeline is used as the transmission medium to transmit the measured value of the water meter at each user end to the data of the information collection and processing center in the collection device. However, fluid is used as an information transmission medium, and its information capacity is small, so it is not suitable for communities or cities with many residents. In addition, once the water is cut off, the information transmission cannot be carried out.

Acoustic wave communication is an ancient communication method. Since the electric/acoustic energy conversion technology was solved, acoustic wave communication technology has been widely used in ship sonar communication systems. Usually, acoustic wave communication technology is mostly applied in the environment with open interface. However, the application in the pipeline should overcome the following problems: First, in the pipeline environment, the multi-directional resonance caused by the physical conditions of the sound transmission medium is particularly strong, and the echo formed by the transmission path is also particularly strong. This resonance and Echo, in some frequency bands, the amplitude of the sound waves will be enhanced due to the overlapping of waveforms, which can be used to resist the channel attenuation of transmission, but in other frequency bands, the waveforms will interfere with each other, resulting in signal disorder and difficult to analyze and restore. Secondly, during the use of the pipeline, the user end will generate noise at any time, and these noises will have a bad influence on the signal during the process of information transmission. In addition, different pipe structures have different frequency response characteristics due to their different physical properties. The pressure of the fluid medium in the pipeline changes with time and the influence of the aging of the pipe wall on the physical characteristics will also cause the available passband of the pipeline to drift. If there is no automatic mechanism to detect the frequency response characteristics of pipelines and change the frequency of transmission and reception at any time to adapt to new situations, it is impossible to realize digital communication of pipeline acoustic waves with practical value.

Contents of the invention

For this reason, the object of the present invention is to propose a pipeline acoustic wave digital communication system, which uses the pipe wall of the pipeline for conveying fluid medium as an information transmission medium by reducing the impact of the environment, so as to obtain Greater information transfer volume.

A further object of the present invention is to propose a pipeline acoustic wave digital communication system capable of adapting to changes in pipeline physical characteristics at any time.

Another object of the present invention is to propose a pipeline acoustic wave digital communication system with safer and more stable information transmission.

In order to realize the purpose of the above invention, the pipeline acoustic wave digital communication system of the present invention includes an information collection sub-station arranged at the user end, an information collection and processing master station that collects and processes information from each of the information collection sub-stations, and connects each of the information collection sub-stations A fluid medium delivery pipeline as an information transmission channel between the station and the information collection and processing master station; wherein

The information collection substation includes a user meter installed on the user pipeline, a processor connected with the user meter signal, and a power distribution/acoustic device installed on the user pipeline and connected with the processor signal Acoustic-electric transducer;

The master station for information collection and processing includes a main electroacoustic/acoustic-electric transducer installed on the main transmission pipeline, and a central processing unit connected to the main electroacoustic/acoustic-electric transducer for signals;

The main electro-acoustic/acoustic-electric transducer and each of the sub-acoustic/acoustic-electric transducers are used to receive the acoustic signal of the pipe wall of the fluid medium delivery pipeline and convert the sound into an electrical signal and convert the electrical signal The acoustic signal is suitable for the transmission of the pipe wall, and the acoustic signal is coupled to the pipe wall; the sub-electric acoustic/acoustic-electric transducer in the information collection sub-station is connected with the pipeline equipment used by the user Install a damper between them.

A sound damper is set between the main electroacoustic/acoustoelectric transducer in the information collection and processing master station and the transmission power machinery in the pipeline system.

Both the sub-electro-acoustic/acoustic-electric transducer and the main electro-acoustic/acoustic-electric transducer are composed of an electro-acoustic/acoustic-electric conversion body and a connecting bridge for connecting with the transmission pipeline.

The processor includes a decoding module that receives and decodes the electrical signal from the sub-acoustic/acoustic-electric transducer, an identification receiving signal module that identifies the signal from the decoding module, and an identification receiving signal module based on the identification receiving signal module. The data acquisition single-board computer for data extraction by instruction signal, the send-back digital signal module for sending the data signal of the data-acquisition single-board computer, and the data signal sent by the send-back digital signal module is encoded and sent to the distribution Coding module for electro-acoustic/acoustic-electric transducers.

The central processor includes a decoding module that receives and decodes the electrical signal from the main electro-acoustic/acoustic-electric transducer, receives a receiving digital signal module that receives a signal from the decoding module, and receives a signal from the receiving digital signal module The instruction signal of the data processing host for data processing, the sending digital signal module for sending the data signal of the data processing host, and the digital signal sent by the sending digital signal module is encoded and sent to the main electro-acoustic/acoustic-electric The encoding module of the transducer.

The decoding module is composed of digital signal processing (DSP) hardware and fast Fourier transform algorithm (FFT) digital filtering and demodulation module.

The encoding module is composed of digital signal processing (DSP) hardware and a fast Fourier transform (FFT) adaptive frequency selection and modulation module.

The present invention also proposes a pipeline acoustic wave digital communication method, including

- The user meter set in each information collection sub-station of the user end collects the metering data of the user at any time in a conventional manner;

-At the same time, the processors of each of the information collection sub-stations are in a state of waiting for a remote command from the information collection and processing master station;

-The central processing unit in the information collection and processing master station uses the frequency suitable for the transmission of acoustic waves on the pipe wall of the pipeline as the base frequency, and sends remote instructions for extracting metering data to each of the information collection sub-stations at regular intervals and sequentially with a modulated signal ;

- The remote command is converted into an acoustic signal by the main electro-acoustic/acoustic-electric transducer in the information collection and processing master station, and the acoustic signal is coupled to the pipe wall of the transmission pipeline and transmitted to each of the information collection sub-station;

- the electroacoustic/acoustoelectric transducer coupled to the pipe wall of the fluid medium delivery pipeline in the information collection substation receives the acoustic signal of the pipe wall and converts the acoustic signal into an instruction electrical signal;

- The processor of the information collection substation receives the electrical signal, and after identifying the signal, confirms whether it is an instruction signal of the information collection substation;

- Upon confirmation, the processor of the corresponding information collection substation extracts the metering data in the user meter according to the corresponding instruction signal, and transmits the signal of the metering data back to the sub-station/acoustic electric transducer;

- the electrical-acoustic/acoustic-electric transducer converts the electrical signal of the metering data into an acoustic signal, and couples the acoustic signal to the pipe wall of the delivery pipeline and transmits it back to the information collection and processing master station;

- The main electro-acoustic/acousto-electric transducer coupled to the pipe wall of the fluid medium delivery pipeline in the information collection and processing master station receives the acoustic signal of the pipe wall and converts the acoustic signal into an electrical signal to be processed Signal.

In the pipeline sound wave digital communication method of the present invention, digital filtering, demodulation and decoding are performed on the electrical signal converted from the acoustic signal to restore it to a digital signal, and adaptive frequency selection and modulation encoding are performed on the digital signal to be sent into an electrical signal A step of.

Compared with the prior art, the above-mentioned technical solution of the present invention has the following advantages. Since the carrier of acoustic wave communication is the pipe wall of the pipeline, its hard characteristics make the sound velocity in it far greater than the sound velocity in the fluid medium in the pipeline, thus making the present invention The system of the invention has a larger information transmission capacity; since the present invention applies the automatic frequency sweeping of sound waves and the adaptive frequency conversion communication technology in the process of sending and receiving information, the communication process of the present invention is not affected by changes in the pressure of the fluid medium in the pipeline and The influence of pipe wall aging and other physical characteristics ensures that the system of the present invention maintains a good information transmission state during use; The impact of various messy noises generated by the cause on information transmission. In addition, the pipeline acoustic wave digital communication technology of the present invention does not require a lot of construction and transformation during the application process, so the promotion cost is low and it is easy to be widely promoted.

Description of drawings

In order to make the content of the present invention more easily understood, the present invention will be described in further detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

Fig. 1 is the basic frame schematic diagram of pipeline acoustic wave digital communication system of the present invention;

Fig. 2 is the structural representation of electroacoustic/acoustoelectric transducer of the present invention;

Fig. 3 is the structural representation of another embodiment of electroacoustic/acoustoelectric transducer of the present invention;

Fig. 4 is a schematic structural view of an embodiment of the sound damper of the present invention;

Fig. 5 is a flow chart of the information transmission method of the pipeline acoustic wave digital communication system of the present invention.

The reference signs in it are expressed as: 1-main transmission pipeline, 2-user pipeline, 3-information collection sub-station, 4-information collection and processing main station, 5-fluid medium transmission pipeline, 6-user meter, 7-processing Device, 8-point electro-acoustic/acoustic-electric transducer, 9-main electro-acoustic/acoustic-electric transducer, 10-electro-acoustic/acoustic-electric conversion main body, 11-connecting bridge, 12-element, 13-spring, 14 - Inertial vibrator, 15 - pipeline equipment used by users, 16 - sound damper, 17 - rubber tube, 20 - central processing unit.

Detailed ways

Referring to FIG. 1 , in this embodiment, reference numeral 1 denotes a main delivery pipeline, and reference numeral 2 denotes a user pipeline. Wherein the pipeline acoustic wave digital communication system includes an information collection sub-station 3 arranged at the user end, an information collection and processing master station 4 for collecting and processing information from each of the information collection sub-stations 3, and connecting each of the information collection sub-stations 3 with the described The fluid medium delivery pipeline 5 serving as an information transmission channel between the information collection and processing master stations 4 . The information collection substation 3 includes a user meter 6 installed on the user pipeline 2, a processor 7 connected with the user meter 6 signal, and installed on the user pipeline 2 and connected to the processor 7 Distributed electroacoustic/acoustoelectric transducer 8 for signal connection. The main station 4 for information collection and processing includes a main electro-acoustic/acoustic-electric transducer 9 installed on the main transmission pipeline 1 , and a central processor 20 signal-connected with the main electro-acoustic/acoustic-electric transducer 9 . The main electro-acoustic/acoustic-electric transducer 9 and each of the sub-acoustic/acoustic-electric transducers 8 are used to receive the acoustic signal of the pipe wall of the fluid medium delivery pipeline 5 and convert the sound into an electrical signal and The electrical signal is converted into an acoustic signal suitable for transmission by the tube wall, and the acoustic signal is coupled to the tube wall. The structures of the sub-acoustic/acoustic-electric transducer 8 and the main electro-acoustic/acoustic-electric transducer 9 are composed of an electro-acoustic/acoustic-electric conversion main body 10 and a pipe for connecting with the delivery pipeline 5. Connecting bridge 11 constitutes. In the prior art, the electro-acoustic/acoustic-electric conversion main body 10 has various working principles and structural forms. In this embodiment, one of them is selected for illustration convenience. Referring to Fig. 2, the electro-acoustic/acousto-electric conversion main body 10 adopted in the present embodiment includes an elastic metal disk element 12 that can convert electrical energy into acoustic vibration, and the element 12 is indirectly fixed on a spring 13, a The inertial vibrator 14 mechanically connected to the transducer, the inertial vibrator 14, the transducer, and the above-mentioned spring 13 are mechanically connected together by means of pressurization, and the electro-acoustic/acoustic-electric conversion body 10 The oscillation frequency can be adjusted by controlling the deformation of the spring 13 by means of the above-mentioned pressurizing means. The function of the connecting bridge 11 is to connect and fasten the electro-acoustic/acoustic-electric conversion main body 10 and the delivery pipeline 5, so as to ensure the connection between the electro-acoustic/acoustic-electric conversion main body 10 and the delivery pipeline 5. Good acoustic coupling contact. As shown in FIG. 2 , it includes a pipe clip assembly whose contact surface with the pipe is a circular arc surface, and a fixing structure on the pipe clip connected to the electroacoustic/acoustic-electric conversion main body 10 . Of course, the connecting bridge 11 can also have a form as shown in Figure 3, in this form, the contact part between the connecting bridge 11 and the pipeline is in the shape of a nozzle with an internal thread, and in use, the contact part and the pipeline One port on the transfer line 5 is tightly connected. Referring to FIG. 1 again, a sound damper 16 is provided between the electro-acoustic/acousto-electric transducer 8 in the information collection substation 3 and the pipeline equipment 15 used by the user. Similarly, a sound damper 16 is also provided between the main electroacoustic/acoustoelectric transducer 9 in the information collection and processing master station 4 and the transmission power machinery in the pipeline system. In this embodiment, as shown in FIG. 4 , the sound damper 16 includes a corrugated rubber tube 17 with high strength and corrosion resistance equivalent to that of the delivery pipeline 5 , and a rubber tube 17 fixed on the rubber tube 17 The two ends are used for connection with the delivery pipeline 5 . The processor 7 includes a decoding module that receives and decodes the electrical signal from the sub-acoustic/acoustic-electric transducer 8, a recognition receiving signal module that recognizes the signal from the decoding module, and a receiving signal module based on the recognition from the recognition receiving signal. The instruction signal of the module carries out the data acquisition single-board computer of data extraction, sends the digital signal module of sending back the data signal of described data collection single-board computer, and encodes the data signal sent by the digital signal module of sending back and sends to all Describe the encoding module of the electro-acoustic/acoustic-electric transducer 8. The central processor 20 includes a decoding module that receives and decodes the electrical signal from the main electro-acoustic/acoustic-electric transducer 9, receives a receiving digital signal module from the decoding module signal, and receives a digital signal from the receiving digital signal. A data processing host for performing data processing on the command signal of the signal module, a sending digital signal module for sending the data signal of the data processing host, and encoding the digital signal sent by the sending digital signal module and sending it to the main electroacoustic/acoustic/ The coding module of the acoustic-electric transducer 9. The decoding module is composed of digital signal processing (DSP) hardware and fast Fourier transform algorithm (FFT) digital filtering and demodulation module. The encoding module is composed of digital signal processing (DSP) hardware and a fast Fourier transform (FFT) adaptive frequency selection and modulation module.

Referring to Fig. 5 now, in use, in described pipeline sound wave digital communication system of the present invention, the user meter 6 that is arranged in each information collection substation 3 of user end collects user's metering data at any time in a conventional manner; The processor 7 of the information collection substation 3 is in the state of waiting for the remote instruction from the information collection and processing master station 4 .

When the central processing unit 20 in the information collection and processing master station 4 takes the frequency suitable for the transmission of the pipe wall acoustic wave of the conveying pipeline 5 as the base frequency, and attaches a modulated signal to send the extraction measurement to each of the information collection sub-stations 3 sequentially at regular intervals. data after the remote command. Firstly, the remote command is processed by the encoding module in the information collection and processing master station 4 to perform adaptive frequency selection and modulation encoding on the transmitted digital signal to become an electrical signal; The transducer 9 converts the acoustic signal into an acoustic signal, and couples the acoustic signal to the pipe wall of the transmission pipeline 5 and transmits it to each of the information collection sub-stations 3 . Then, the electroacoustic/acoustoelectric transducer 8 coupled with the pipe wall of the fluid medium delivery pipeline 5 in the information collection substation 3 receives the acoustic signal transmitted from the pipe wall and converts the acoustic signal The signal is converted into a command electrical signal. Thereafter, the processor 7 of the information collection substation 3 receives the electrical signal, and digitally filters and demodulates the electrical signal through the decoding module therein, and confirms whether it is the information collection substation 3 after identification. command signal. After confirmation, the processor 7 of the corresponding information collection substation 3 extracts the metering data in the local user meter 6 according to the corresponding instruction signal, and sends the signal of the metering data through the digital signal sent back The modulus is passed back to the encoding module, where the digital signal undergoes adaptive frequency selection and modulation encoding to become an electrical signal. And this electrical signal is output to described sub-electric sound/acoustic-electric transducer 8; Then, described sub-electrical-acoustic/acoustic-electric transducer 8 converts the electrical signal of the metering data into an acoustic signal, and The acoustic signal is coupled to the pipe wall of the delivery pipeline 5 and transmitted back to the information collection and processing master station 4; The main electroacoustic/acoustoelectric transducer 9 receives the acoustic signal of the pipe wall and converts the acoustic signal into an electrical signal to be processed, and the electrical signal to be processed is digitally filtered and demodulated to be decoded into a digital signal. The electrical signal is sent to the data processing host through the receiving digital signal module in the information collection and processing master station 4 for processing. The pipeline acoustic wave digital communication system of the present invention repeats the above process, extracts, transmits and processes the metering information of each user's meter one by one, and realizes the purpose of centralized meter reading. In this embodiment, since the information transmission medium is solid, especially the pipe wall made of metal, the propagation speed of sound in it is much faster than that of the fluid information transmission medium. In this way, the information extraction and transmission cycle of each user is relatively short, so more user's meter reading work can be completed in a unit time.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (9)

1. pipeline sound wave digital communication system, comprise the information acquisition substation (3) that is arranged on user side, collection and treatment is handled main website (4) from the information gathering of each described information acquisition substation (3) information, and connects between each described information acquisition substation (3) and the described information gathering processing main website (4) the fluid media (medium) delivery line (5) as the information transmission channel; Wherein

Described information acquisition substation (3) comprises the user's gauging table (6) that is installed on user's pipeline (2), the processor (7) that is connected with described user's gauging table (6) signal, and be installed in branch electroacoustic/acoustic-electrical transducer (8) that described user's pipeline (2) is gone up and is connected with described processor (7) signal;

Information gathering is handled main website (4) and is comprised the main electroacoustic/acoustic-electrical transducer (9) that is installed on the described primary transfer line (1), and the central processing unir (20) that is connected with described main electroacoustic/acoustic-electrical transducer (9) signal;

It is characterized in that:

Described minute of described main electroacoustic/acoustic-electrical transducer (9) and each electroacoustic/acoustic-electrical transducer (8) is used to receive the acoustical signal of described fluid media (medium) delivery line (5) tube wall and this sound is converted to electric signal and is the acoustical signal that is suitable for described tube wall transmission with electrical signal conversion, and this acoustical signal is coupled on the described tube wall; Between the pipe-line equipment that described minute electroacoustic/acoustic-electrical transducer (8) in the described information acquisition substation (3) and user use resistance sound device (16) is set.

2. pipeline sound wave digital communication system according to claim 1 is characterized in that described information gathering is handled between described main electroacoustic/acoustic-electrical transducer (9) in the main website (4) and the transmitting power machinery in the described pipeline system resistance sound device (16) is set.

3. pipeline sound wave digital communication system according to claim 1, it is characterized in that described processor (7) comprise reception from described minute electroacoustic/acoustic-electrical transducer (8) electric signal and carry out decoding module, identification is from the identification received signal module of described decoder module signal, according to the data acquisition single card microcomputer that carries out data extract from the command signal of described identification received signal module, send described data acquisition single card microcomputer data-signal postback the digital signal module and with described postback data-signal that the digital signal module sends encode and send to described minute electroacoustic/acoustic-electrical transducer (8) coding module.

4. pipeline sound wave digital communication system according to claim 1 is characterized in that described central processing unir (20) comprises that reception is from the electric signal of described main electroacoustic/acoustic-electrical transducer (9) and carry out decoding module, reception is from the receiving digital signals module of described decoder module signal, according to the data processing main frame that carries out data processing from the command signal of described receiving digital signals module, send transmission digital signal module and the encoding digital signals that described transmission digital signal module is sent and the coding module that sends to described main electroacoustic/acoustic-electrical transducer (9) of the data-signal of described data processing main frame.

5. according to claim 3 or 4 described pipeline sound wave digital communication systems, it is characterized in that described decoder module is by digital signal processing (DSP) hardware and fast Fourier transformation algorithm (FFT) digital filtering and demodulation module formation.

6. according to claim 3 or 4 described pipeline sound wave digital communication systems, it is characterized in that described coding module is by digital signal processing (DSP) hardware and fast Fourier transformation algorithm (FFT) adaptive frequency-selecting and modulation module formation.

7. according to claim 3 or 4 described pipeline sound wave digital communication systems, it is characterized in that described decoder module and described coding module are integrated in the same module by digital signal processing (DSP) hardware and fast Fourier transformation algorithm (FFT) module formation, wherein said fast Fourier transformation algorithm (FFT) module is finished digital filtering and demodulation and adaptive frequency-selecting and modulation work respectively in the process of acceptance and transmission digital signal.

8. a pipeline sound wave digital communication method comprises

-user's gauging table (6) of being arranged in each information acquisition substation (3) of user side is collected user's continuous data at any time with usual manner;

-processor (7) of each described information acquisition substation (3) is in the state of the teleinstruction of outstanding message collection and treatment main website (4) simultaneously;

The central processing unir (20) that-described information gathering is handled in the main website (4) is a fundamental frequency with the frequency of the tube wall sonic transmissions that is suitable for delivery line (5), attachedly regularly sends the teleinstruction that extracts continuous data to each described information acquisition substation (3) successively with modulation signal;

Main electroacoustic/acoustic-electrical transducer (9) that-described teleinstruction is handled in the main website (4) through described information gathering is converted to acoustical signal, and this acoustical signal is coupled to the tube wall of described delivery line (5) and passes to each described information acquisition substation (3);

In-described information acquisition the substation (3) with the coupling of the tube wall of described fluid media (medium) delivery line (5) described minute electroacoustic/acoustic-electrical transducer (8) receive the acoustical signal of described tube wall and this acoustical signal be converted to the instruction electric signal;

The described processor (7) of-described information acquisition substation (3) receives described electric signal, and through described signal is discerned, confirms whether be this information acquisition substation (3) command signal;

-through confirming, the described processor (7) of corresponding described information acquisition substation (3) extracts continuous data in described user's gauging table (6) according to the command signal of correspondence, and described minute electroacoustic/acoustic-electrical transducer (8) got back in the signal transmission of this continuous data;

-described minute electroacoustic/acoustic-electrical transducer (8) be acoustical signal with the electrical signal conversion of described this continuous data, and pass the tube wall that this acoustical signal is coupled to described delivery line (5) back described information gathering and handle main website (4);

Described main electroacoustic/acoustic-electrical transducer (9) that-described information gathering is handled in the main website (4) with the tube wall coupling of described fluid media (medium) delivery line (5) receives the acoustical signal of described tube wall and this acoustical signal is converted to pending electric signal.

9. pipeline sound wave digital communication method according to claim 8 is characterized in that also comprising that the electric signal that is converted to by acoustical signal is carried out digital filtering to be reduced into digital signal and the digital signal that is about to send is carried out adaptive frequency-selecting becomes electric signal with modulating-coding step with demodulating and decoding.

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