CN114935116B - Ultra-high pressure gas pipeline infrasonic wave monitoring device, monitoring system and method - Google Patents
Ultra-high pressure gas pipeline infrasonic wave monitoring device, monitoring system and method Download PDFInfo
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- CN114935116B CN114935116B CN202210546292.3A CN202210546292A CN114935116B CN 114935116 B CN114935116 B CN 114935116B CN 202210546292 A CN202210546292 A CN 202210546292A CN 114935116 B CN114935116 B CN 114935116B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
Abstract
The application relates to an ultra-high pressure gas pipeline infrasonic wave monitoring device, a monitoring system and a monitoring method, which relate to the technical field of gas pipeline monitoring and comprise a signal acquisition unit, a filtering amplifying unit, a power supply unit and a control unit, wherein the input end of the power supply unit is connected with an external power supply, the output end of the power supply unit is respectively connected with the signal acquisition unit, the filtering amplifying unit and the control unit, and the signal acquisition unit, the filtering amplifying unit and the control unit are connected in series; the signal acquisition unit is used for acquiring a first sonic signal generated by the ultrahigh pressure gas in the transportation of the ultrahigh pressure gas pipeline and converting the first sonic signal into a first sonic electric signal; the filtering and amplifying unit is used for performing anti-aliasing filtering and amplifying on the first sonic electric signal; the control unit is used for receiving the first sonic electric signal converted by the signal acquisition unit and outputting the first sonic electric signal to the control center. The application has the effect of realizing gas leakage monitoring of the ultra-high pressure gas pipeline.
Description
Technical Field
The application relates to the technical field of gas pipeline monitoring, in particular to an ultra-high pressure gas pipeline infrasonic wave monitoring device, a monitoring system and a monitoring method.
Background
At present, pipeline transportation is a main form in a gas transportation system in China, plays an increasingly prominent role in the comprehensive transportation system, and has an increasingly obvious influence on the healthy development of economy in China.
In recent years, along with the development of economy, the monitoring of ultra-high pressure gas pipelines is also receiving more and more attention, for example, transportation pipelines of oilfield gas reservoirs, and dozens of ultra-high pressure gas transmission pipelines of oilfield gas reservoir operation areas are in an industrial park, which belongs to a high risk area, and a great number of enterprises and residents exist in the industrial park, and as the pressure in the transportation pipelines of the gas reservoirs is generally 20-30 MPa, the pipelines are in an ultra-high pressure state, once the pipelines leak, the pipelines are stopped, huge economic loss is brought, and the environment is damaged.
At present, a sound wave detection method is generally adopted to monitor a gas transportation pipeline, but the existing sound wave monitoring device generally works at about 15MPa and cannot monitor an ultra-high pressure gas pipeline.
Disclosure of Invention
In order to realize gas leakage monitoring of an ultra-high pressure gas pipeline, the application provides an ultra-high pressure gas pipeline infrasonic wave monitoring device, a monitoring system and a monitoring method.
In a first aspect, the application provides an ultra-high pressure gas pipeline infrasonic wave monitoring device, which adopts the following technical scheme: the ultra-high pressure gas pipeline infrasonic wave monitoring device comprises a signal acquisition unit, a filtering and amplifying unit, a power supply unit and a control unit, wherein the input end of the power supply unit is connected with an external power supply, the output end of the power supply unit is respectively connected with the signal acquisition unit, the filtering and amplifying unit and the control unit, and the signal acquisition unit, the filtering and amplifying unit and the control unit are connected in series;
the signal acquisition unit is used for acquiring a first sonic signal generated by the ultrahigh pressure gas in the transportation of the ultrahigh pressure gas pipeline and converting the first sonic signal into a first sonic electric signal;
the filtering and amplifying unit is used for performing anti-aliasing filtering and amplifying on the first sonic electric signal;
the power supply unit is used for providing power for the signal acquisition unit, the filtering and amplifying unit and the control unit;
The control unit is used for receiving the first sonic electric signal converted by the signal acquisition unit, processing the first sonic electric signal and outputting the first sonic electric signal to the control center.
Through adopting above-mentioned technical scheme, signal acquisition unit converts the first sonic wave signal of gathering into first sonic wave signal, then carries out anti-aliasing filtering and the amplification processing of filter amplification unit with first sonic wave signal, later transmits first sonic wave signal to the control unit, and the control unit carries out processing with the first sonic wave signal of receipt and transmits to control center, utilizes signal acquisition unit to carry out real-time collection to the sonic wave signal of super high pressure gas pipeline to realize the monitoring to super high pressure gas pipeline.
Optionally, the power supply unit includes a first power supply unit, a second power supply unit, a third power supply unit and a fourth power supply unit, the input ends of the first power supply unit, the second power supply unit and the fourth power supply unit are all connected to an external power supply, the output ends of the first power supply unit are respectively connected to the signal acquisition unit, the filtering amplifying unit and the control unit, the output ends of the second power supply unit are respectively connected to the signal acquisition unit, the filtering amplifying unit and the control unit, and the output ends of the third power supply unit and the fourth control unit are both connected to the control unit.
Through adopting above-mentioned technical scheme, power supply unit provides operating voltage for signal acquisition unit, filtering amplification unit and control unit, makes signal acquisition unit, filtering amplification unit and control unit normal operating to make super high pressure gas pipeline infrasonic wave monitoring device better carry out gas leakage monitoring to super high pressure gas pipeline.
Optionally, the filtering amplifying unit includes a second-stage amplifying subunit, an electronic potentiometer, an integrating subunit and an anti-aliasing filtering subunit, the input end of the second-stage amplifying subunit is respectively connected to the electronic potentiometer and the signal acquisition unit, the output end of the second-stage amplifying subunit is connected to the input end of the integrating subunit, the output end of the integrating subunit is connected to the input end of the anti-aliasing filtering subunit, and the output end of the anti-aliasing filtering subunit is connected to the control unit.
By adopting the technical scheme, the second-stage amplifying subunit amplifies the first acoustic wave electric signal, so that the control unit is convenient to process the first acoustic wave electric signal, and then the anti-aliasing filtering subunit refines the gain and carries out anti-aliasing filtering on the first acoustic wave electric signal, so that the background noise in the first acoustic wave electric signal is inhibited, and the ultra-high pressure gas pipeline infrasonic wave monitoring device is suitable for monitoring gas leakage in an ultra-high pressure gas pipeline.
Optionally, the filter amplifier further comprises a splitting unit, wherein the input end of the splitting unit is connected with the filter amplifier, and the output end of the splitting unit is respectively connected with the control unit and the control center; the splitting unit is used for splitting the sound wave signals output by the filtering and amplifying unit and transmitting the sound wave signals output by the filtering and amplifying unit.
Through adopting above-mentioned technical scheme, the splitting unit can be with the first sonic signal after the filter amplification unit handles respectively transmission to control unit and control center, and control unit can be according to the parameter of the first sonic signal regulation filter amplification unit of receipt and signal acquisition unit to make the first sonic signal that control center received more accurate, and then make ultra-high pressure gas pipeline infrasonic wave monitoring device more accurate to the gas leakage monitoring of ultra-high pressure gas pipeline.
In a second aspect, the application provides an ultra-high pressure gas pipeline monitoring system, which adopts the following technical scheme:
the utility model provides an ultra-high pressure gas pipeline monitoring system, includes pipe wall type sound wave monitoring subsystem and control center, pipe wall type sound wave monitoring subsystem includes pipe wall type subsonic sensor, pipe wall type subsonic sensor will detect the second sound wave electric signal transmission extremely control center still includes medium type sound wave monitoring subsystem, medium type sound wave monitoring subsystem includes a plurality of ultra-high pressure gas pipeline subsonic wave monitoring devices of the inside first aspect that sets up in ultra-high pressure gas pipeline, ultra-high pressure gas pipeline subsonic wave monitoring devices will detect first sound wave electric signal transmission extremely control center.
Through adopting above-mentioned technical scheme, pipe wall type secondary sensor transmits the second sonic electric signal that detects to control center, and ultra-high pressure gas pipeline infrasonic wave monitoring devices transmits the first sonic electric signal that detects to control center simultaneously, and control center carries out real-time supervision to ultra-high pressure gas pipeline gas leakage according to first sonic electric signal and second sonic electric signal to reduce false alarm or the possibility of missing report.
In a third aspect, the present application provides a method for monitoring an ultrahigh pressure gas pipeline, which adopts the following technical scheme:
an ultra-high pressure gas pipeline monitoring method applied to a control center, the method comprising:
acquiring a first acoustic wave electric signal and a second acoustic wave electric signal, wherein the first acoustic wave electric signal is detected by the ultra-high pressure gas pipeline infrasonic wave monitoring device according to the first aspect, and the second acoustic wave electric signal is detected by a pipe wall type infrasonic wave sensor arranged on the outer wall of the ultra-high pressure gas pipeline;
performing anomaly analysis on the ultra-high pressure gas pipeline according to the first sonic electric signal to obtain a first analysis result;
performing abnormal analysis on the ultra-high pressure gas pipeline according to the second sonic electric signal to obtain a second analysis result;
And if the first analysis result and the second analysis result are abnormal, determining that the ultrahigh-pressure gas pipeline leaks.
Through adopting above-mentioned technical scheme, control center carries out the anomaly analysis to first sonic electrical signal and second sonic electrical signal in real time, when detecting that first sonic electrical signal and second sonic electrical signal all take place unusual, control center judges that the ultrahigh pressure gas pipeline takes place to leak, compares in a sonic monitoring system, adopts two kinds of monitoring systems of pipe wall type sonic monitoring subsystem and medium type sonic monitoring subsystem to monitor the ultrahigh pressure gas pipeline, and is more accurate.
Optionally, the performing data analysis on the first sonic electrical signal to obtain a first analysis result includes:
extracting a first sonic characteristic of the first sonic electrical signal;
comparing a first preset sound wave characteristic with the first sound wave characteristic;
if the first preset sound wave characteristics are inconsistent with the first sound wave characteristics, the first analysis result is abnormal; and/or, the data analysis is performed on the second sonic signal, and the obtaining of the second analysis result includes:
extracting a second sonic characteristic of the second sonic electrical signal;
Comparing a second preset sound wave characteristic with the second sound wave characteristic;
if the second preset sound wave characteristics are inconsistent with the second sound wave characteristics, the second analysis result is abnormal.
Optionally, after the determining that the ultrahigh pressure gas pipeline leaks, the method further includes:
and positioning a leakage point on the ultra-high pressure gas pipeline based on the first sonic electric signal and/or the second sonic electric signal.
Optionally, the positioning the leakage point on the ultra-high pressure gas pipeline based on the first sonic electrical signal includes:
acquiring a first moment and a second moment of the first sonic electric signal, wherein the first moment and the second moment are the earliest two moments when the first sonic electric signal is abnormal;
acquiring a first position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to the first moment and a second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to the second moment;
and positioning the leakage point based on the first position and the second position.
Optionally, the positioning the leakage point on the ultra-high pressure gas pipeline based on the second sonic electrical signal includes:
Acquiring second sonic electric signals detected by at least two pipe wall type secondary acoustic sensors;
acquiring phases of abnormal wave bands of the at least two second sonic electric signals in the second sonic electric signals;
and calculating the position of the leakage point based on the phase of the abnormal wave band in the second sonic electric signal.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the signal acquisition unit converts the acquired first sonic signal into a first sonic electric signal, then the first sonic electric signal is subjected to anti-aliasing filtering and amplifying treatment by the filtering and amplifying unit, then the first sonic electric signal is transmitted to the control unit, the control unit processes the received first sonic electric signal and transmits the processed first sonic electric signal to the control center, and the signal acquisition unit is used for acquiring the sonic signal of the ultrahigh-pressure gas pipeline in real time, so that the monitoring of the ultrahigh-pressure gas pipeline is realized;
2. the amplifying subunit amplifies the first acoustic wave electric signal, so that the control unit is convenient to process the first acoustic wave electric signal, and then the anti-aliasing filtering subunit refines gain and carries out anti-aliasing filtering on the first acoustic wave electric signal, so that the suppression of background noise in the first acoustic wave electric signal is realized, and the ultra-high pressure gas pipeline infrasonic wave monitoring device is suitable for monitoring gas leakage in an ultra-high pressure gas pipeline;
3. The pipe wall type secondary sensor transmits the detected second sonic electric signal to the control center, and meanwhile, the ultra-high pressure gas pipeline infrasonic wave monitoring device transmits the detected first sonic electric signal to the control center, and the control center monitors gas leakage of the ultra-high pressure gas pipeline in real time according to the first sonic electric signal and the second sonic electric signal, so that the possibility of false alarm or missing alarm is reduced.
Drawings
FIG. 1 is a block diagram of an ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 2 is a schematic circuit diagram of a first power supply unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 3 is a schematic circuit diagram of a second power supply unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 4 is a schematic circuit diagram of a third power supply unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 5 is a schematic circuit diagram of a fourth power supply unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 6 is a schematic circuit diagram of a signal acquisition unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 7 is a schematic circuit diagram of a filtering and amplifying unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 8 is a schematic circuit diagram of a splitting unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 9 is a schematic circuit diagram of a control unit of the ultra-high pressure gas pipeline infrasonic wave monitoring device in an embodiment of the application.
Fig. 10 is a block diagram of an ultra-high pressure gas pipeline monitoring system in an embodiment of the application.
FIG. 11 is a flow chart of a method for monitoring an ultra-high pressure gas pipeline according to an embodiment of the application.
Reference numerals illustrate: 1. a signal acquisition unit; 11. a first stage amplifying subunit; 12. a first follower subunit; 13. a first filtering subunit; 14. a second follower subunit; 2. a filtering and amplifying unit; 21. a second-stage amplifying subunit; 22. an electronic potentiometer; 23. an integrating subunit; 24. an anti-aliasing filtering subunit; 3. a power supply unit; 31. a first power supply unit; 32. A second power supply unit; 33. a third power supply unit; 34. a fourth power supply unit; 4. a control unit; 5. splitting the unit; 6. a control center; 7. a tube wall type secondary acoustic sensor; 8. a first transmission assembly; 9. and a second transmission assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings 1 to 11 and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The embodiment of the application discloses an ultra-high pressure gas pipeline infrasonic wave monitoring device. Referring to fig. 1, the ultra-high pressure gas pipeline infrasonic wave monitoring device comprises a signal acquisition unit 1, a filtering and amplifying unit 2, a power supply unit 3 and a control unit 4, wherein the input end of the power supply unit 3 is connected with an external power supply, the output end of the power supply unit 3 is respectively connected with the signal acquisition unit 1, the filtering and amplifying unit 2 and the control unit 4, and the signal acquisition unit 1, the filtering and amplifying unit 2 and the control unit 4 are connected in series; the signal acquisition unit 1 is used for acquiring a first sound wave signal, converting the first sound wave signal into a first sound wave electric signal, the filtering and amplifying unit 2 is used for performing anti-aliasing filtering and amplifying on the first sound wave electric signal, the power supply unit 3 is used for providing power for the signal acquisition unit 1, the filtering and amplifying unit 2 and the control unit 4, the control unit 4 is used for receiving the first sound wave electric signal converted by the signal acquisition unit 1, processing the first sound wave electric signal and outputting the first sound wave electric signal to the control center 6.
In the present embodiment, the power supply unit 3 includes a first power supply unit 31, a second power supply unit 32, a third power supply unit 33, and a fourth power supply unit 34, input ends of the first power supply unit 31, the second power supply unit 32, and the fourth power supply unit 34 are all connected to an external power supply, output ends of the first power supply unit 31 are respectively connected to the signal acquisition unit 1, the filter amplification unit 2, and the control unit 4, output ends of the second power supply unit 32 are respectively connected to the signal acquisition unit 1, the filter amplification unit 2, and the control unit 4, and output ends of the third power supply unit 33 and the fourth power supply unit 34 are all connected to the control unit 4.
In this embodiment, the external power supply can provide a 6V power supply and a-9V power supply.
Referring to fig. 1 and 2, in detail, the first power supply unit 31 includes a control chip U9, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a resistor R28, a resistor R29, and a resistor R30; the 8 pins of the control chip U9 are connected to a 6V power supply, the 6 pins of the control chip U9 are connected to one end of a capacitor C36, the other end of the capacitor C36 is connected to one end of a capacitor C37 and a grounding end PGND respectively, the other end of the capacitor C37 is connected to the 6V power supply, the 5 pins of the control chip U9 are connected with POWC ports, the POWC ports are connected to the control unit 4, the 1 pins of the control chip U9 are connected to one end of a capacitor C35, one end of a resistor R28, one end of a capacitor C34 and a 2.5V output end respectively, the other end of the capacitor C35 is connected to the 2 pins of the control chip U9, the other end of the resistor R28 is connected to the 2 pins of the control chip U9, the other end of the capacitor C34 is connected to one end of a resistor R30 and the grounding end PGND respectively, and the other end of the resistor R30 is connected to the grounding end AGND.
Referring to fig. 1 and 3, the second power supply unit 32 includes a control chip U10, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a resistor R31, a resistor R32, and a resistor R33; the 8 pins of the control chip U10 are connected to a 6V power supply, the 6 pins of the control chip U10 are connected to one end of a capacitor C40, the other end of the capacitor C40 is connected to one end of a capacitor C41 and a grounding end PGND respectively, the other end of the capacitor C41 is connected to the 6V power supply, the 5 pins of the control chip U10 are connected to a POWA port, the POWA port is connected to the control unit 4, the 1 pins of the control chip U10 are connected to one end of a capacitor C39, one end of a resistor R31, one end of a capacitor C38 and a 5V output end respectively, the other end of the capacitor C39 is connected to the 2 pins of the control chip U10, the other end of the resistor R31 is connected to the 2 pins of the control chip U10, the other end of the capacitor C38 is connected to one end of a resistor R33 and the grounding end PGND respectively, and the other end of the resistor R33 is connected to the grounding end AGND.
Referring to fig. 1 and 4, the third power supply unit 33 includes a control chip U11, a capacitor C42, a capacitor C43, a capacitor C44, a capacitor C45, a resistor R34, a resistor R35, and a resistor R36; the 8 pins of the control chip U11 are connected with a-9V power supply, the 6 pins of the control chip U11 are connected with one end of a capacitor C44, the other end of the capacitor C44 is connected with one end of a capacitor C45 and a grounding end PGND respectively, the other end of the capacitor C45 is connected with the-9V power supply, the 5 pins of the control chip U11 are connected with a POWB port, the POWB port is connected with the control unit, the 1 pins of the control chip U11 are connected with one end of a capacitor C43, one end of a resistor R34, one end of a capacitor C42 and a-2.5V output respectively, the other end of the capacitor C43 is connected with the 2 pins of the control chip U11, the other end of the resistor R34 is connected with the 2 pins of the control chip U11, the other end of the capacitor C42 is connected with one end of a resistor R36 and the grounding end PGND respectively, and the other end of the resistor R36 is connected with the grounding end AGND.
Referring to fig. 1 and 5, the fourth power supply unit 34 includes a control chip U12, a capacitor C46, a capacitor C47, a capacitor C48, a capacitor C49, a capacitor C50, a capacitor C51, a resistor R37, a resistor R38, a resistor R39, and a resistor R40; the 1 pin of the control chip U12 is respectively connected to the 3 pin of the control chip U12, one end of the capacitor C46, one end of the capacitor C47 and a 6V power supply, the capacitor C46, the capacitor C47 and the 2 pin of the control chip U12 are respectively connected to the ground terminal PGND, the 4 pin of the control chip U12 is connected to one end of the capacitor C49, the other end of the capacitor C49 is respectively connected to one end of the resistor R39, one end of the resistor R40 and the ground terminal PGND, the other end of the resistor R39 is connected to the ground terminal DGND, the other end of the resistor R40 is connected to the ground terminal AGND, the 5 pin of the control chip U12 is respectively connected to one end of the capacitor C49, one end of the resistor R37 and one end of the resistor R38, the other end of the resistor R37 is respectively connected to the output terminal AVDD and one end of the capacitor C51, the other end of the capacitor C51 is connected to the ground terminal AGND, the other end of the resistor R38 is respectively connected to one end of the capacitor C50 and the output terminal DGND, and the other end of the capacitor C50 is connected to the ground terminal DGND.
Specifically, the control chip U9 may convert the 6V power supply to a 2.5V output power supply, so as to meet the power requirements of the filtering and amplifying unit 2, the signal collecting unit 1 and the control unit 4; the control chip U10 can convert the 6V power supply unit into a 5V output power supply so as to meet the power requirements of the filtering and amplifying unit 2, the signal acquisition unit 1 and the control unit 4; the control chip U11 can convert a-9V power supply into a-2.5V output power supply so as to meet the power consumption requirements of the signal acquisition unit 1 and the control unit 4; the control chip U11 can convert the 6V power supply into VDD reference voltage and AVDD reference voltage to meet the working requirements of the filter amplifying unit 2 and the control unit 4.
In this embodiment, the optional model of the control chip U9 is TPS7a4901, the optional model of the control chip U10 is TPS7a3001, and the optional model of the control chip U12 is SPX3819-3.3.
Referring to fig. 1 and 6, as an alternative implementation of the present embodiment, the signal acquisition unit 1 includes a first-stage amplifying subunit 11, a first following subunit 12, a first filtering subunit 13, and a second following subunit 14; the input end of the first-stage amplification subunit 11 is connected with a piezoelectric diaphragm CON1, the piezoelectric diaphragm CON1 is used for converting a detected first sound wave signal into a first sound wave electric signal, the output end VSO1 of the first-stage amplification subunit 11 is connected with the input end of the first following subunit 12, the output end of the first following subunit 12 is connected with the input end of the first filtering subunit 13, the output end of the first filtering subunit 13 is connected with the input end of the second following subunit 14, and the output end of the second following subunit 14 is connected with the filtering amplification unit 2.
In the present embodiment, the primary amplifying subunit 11 includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a resistor R1A, a resistor R2, and a control chip U1; the 1 pin and the 3 pin of the piezoelectric diaphragm CON1 are connected to the ground terminal AGND, the 2 pin of the piezoelectric diaphragm CON1 is connected to one end of the capacitor C1, the other end of the capacitor C1 is connected to the 8 pin of the control chip U1, the 7 pin of the control chip U1 is connected to one end of the capacitor C4, one end of the capacitor C3 and the ground terminal AGND respectively, the other end of the capacitor C4, the other end of the capacitor C3 and the 6 pin of the control chip U1 are connected to the 2.5V output terminal, the 3 pin of the control chip U1 is connected to one end of the capacitor C5, one end of the capacitor C6 and the-2.5V output terminal respectively, the other end of the capacitor C5 and the other end of the capacitor C6 are connected to the ground terminal AGND respectively, the 1 pin of the control chip U1 and the 2 pin of the control chip are connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R1A, one end of the capacitor C2 and the output terminal VSO1 respectively, the other end of the resistor R1A is connected to the other end of the resistor R1 and the other end of the resistor C1 is connected to the output terminal VSO1, and the other end of the resistor C1 is connected to the output unit 12.
Specifically, the piezoelectric diaphragm CON1 can bear the pressure of the gas in the ultrahigh-pressure gas pipeline, collect the first sonic signal generated in the ultrahigh-pressure gas pipeline during transportation of the gas in the ultrahigh-pressure gas pipeline, convert the first sonic signal into a first sonic electric signal, transmit the first sonic electric signal into the control chip U1, amplify the first sonic electric signal through the control chip U1, and enable the filtering and amplifying unit 2 to filter and amplify the first sonic electric signal more easily.
In the present embodiment, the first follower subunit 12 includes a control chip U2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C8, a capacitor C9, and a capacitor C10; the output end VSO1 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to the 4 pin of the control chip U2, the 2 pin of the control chip U2 is connected to the ground end AGND, the 3 pin of the control chip U2 is respectively connected to one end of a capacitor C10, one end of a resistor R7 and one end of a resistor R6, the other end of the capacitor C10 and the other end of the resistor R7 are both connected to the ground end AGND, and the other end of the resistor R6 is connected to the 2.5V output end; the 5 pins of control chip U2 are connected in capacitor C7's one end, capacitor C8's one end and 5V output respectively, capacitor C7's the other end and capacitor C8's the other end all are connected in ground connection end AGND, control chip U2's 1 pin is connected in capacitor C9's one end and resistor R4's one end respectively, resistor R4's the other end is connected in control chip U2's 4 pins, capacitor C9's the other end is connected in resistor R5's one end and the input of first filter subunit 13 respectively, resistor R5's the other end is connected in 2.5V output.
Specifically, the control chip U2 follows and isolates the first acoustic wave electric signal processed by the control chip U1, so that the processing of the first acoustic wave electric signal by the filtering and amplifying unit 2 does not affect the processing of the first acoustic wave electric signal by the control chip U1.
The first filtering subunit 13 includes a control chip U3, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a capacitor C12, a capacitor C13, and a transistor Q1; one end of the resistor R8 is connected to the capacitor C9, the other end of the resistor R8 is connected to the 2 pin of the control chip U3, the 1 pin of the control chip U3 is connected to one end of the capacitor C11 and the 6 pin of the control chip U3 respectively, the 3 pin of the control chip U3 is connected to one end of the capacitor C13, one end of the capacitor C12 and the ground terminal AGND respectively, the other end of the capacitor C12 and the other end of the capacitor C13 are connected to the 5V output terminal, the 4 pin and the 7 pin of the control chip U3 are connected to the 5V output terminal respectively, the 8 pin of the control chip U3 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R9 and the collector of the triode Q1 respectively, the other end of the resistor R9 is connected to the 5V output terminal, the base of the triode Q1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the LK port, the FCLK port is connected to the control unit, the emitter of the triode Q1 is connected to the ground terminal ND, and the 5 pin of the control chip U3 is connected to the second subunit 14.
Specifically, the control chip U3 filters the isolated first acoustic wave electric signal according to the control signal of the control unit 4, so that the isolated first acoustic wave electric signal is more stable and accurate.
The second following subunit 14 includes control chip U4, capacitor C14 and capacitor C15, control chip U4's 3 pin is connected in control chip U3's 5 pin, control chip U4's 2 pin is connected in ground terminal AGND, control chip U4's 1 pin is connected in control chip U4's 4 pin, control chip U4's 5 pin is connected in capacitor C14's one end respectively, capacitor C15's one end and 5V output, capacitor C14's the other end and capacitor C15's the other end all are connected in ground terminal AGND, control chip U4's 4 pin is connected with the VSO2 output.
Specifically, the control chip U4 isolates and follows the input first acoustic wave electric signal, so that the first acoustic wave electric signal output by the control chip U3 is not affected when the first acoustic wave electric signal output by the control chip U4 is processed.
In this embodiment, the optional model of the control chip U1 is LMP7721, the optional models of the control chip U2 and the control chip U4 are AD8605, and the optional model of the control chip U3 is MAX7480.
Referring to fig. 1 and 7, in the present embodiment, the filter amplification unit 2 includes a secondary amplification subunit 21, an electronic potentiometer 22, an integration subunit 23, and an anti-aliasing filter subunit 24, wherein the input end of the secondary amplification subunit 21 is connected to the electronic potentiometer 22 and the signal acquisition unit 1, the output end of the secondary amplification subunit 21 is connected to the input end of the integration subunit 23, the output end of the integration subunit 23 is connected to the input end of the anti-aliasing filter subunit 24, and the output end of the anti-aliasing filter subunit 24 is connected to the control unit 4.
As an alternative implementation of the present embodiment, the secondary amplifying subunit 21 includes a control chip U5, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a capacitor C16, a capacitor C17, a capacitor C18, and a capacitor C19; one end of the resistor R13 is connected to the VSO2 output end, the other end of the resistor R13 is connected to one end of the capacitor C16 and the 2 pin of the control chip U5 respectively, the other end of the capacitor C16 is connected to the 1 pin of the control chip U5 and one end of the resistor R17 respectively, the other end of the resistor R17 is connected to the 6 pin of the control chip U5, the 3 pin of the control chip U5 is connected to one end of the resistor R15, the other end of the resistor R15 is connected to one end of the capacitor C17, one end of the resistor R16 and the 2.5V output end respectively, the other end of the capacitor C17 is connected to the ground end AGND, the other end of the resistor R16 is connected to the 5 pin of the control chip U5, the 8 pin of the control chip U5 is connected to one end of the capacitor C18, one end of the capacitor C19 and the 5V output end respectively, and the other end of the capacitor C18 and the other end of the capacitor C19 are connected to the ground end AGND.
The electronic potentiometer 22 includes a control chip U6, a resistor R19, a capacitor C21, a capacitor C22, a capacitor C23, and a capacitor C24; the 11 pin of the control chip U6 is respectively connected with one end of the capacitor C21, one end of the capacitor C22 and the 5V output end, the other end of the capacitor C21 and the other end of the capacitor C22 are respectively connected with the ground end AGND, the 13 pin of the control chip U6 is connected with the SCLK port, the 14 pin of the control chip U6 is connected with the SDI port, the 15 pin of the control chip U6 is connected with the SDO port, the SCLK port, the SDI port and the SCLK port are respectively connected with the control unit, the 12 pin of the control chip is respectively connected with one end of the capacitor C23, one end of the capacitor C24 and the output end VDD, the other end of the capacitor C23 and the other end of the capacitor C24 are respectively connected with the ground end DGND, the 15 pin of the control chip U6 is also connected with one end of the resistor R19, the other end of the resistor R19 is connected with the VDD output end, the 1 pin and the 3 pin of the control chip U6 are respectively connected with the ground end DGND, the 2 pin of the control chip U6 is connected with the SDIO port, the 7 pin 7 of the control chip U6 is connected with the ground end ND, the 5 pin of the control chip U6 is connected with the end of the resistor U6, the other end of the resistor R14 is connected with the resistor R5, the other end of the resistor R18 is connected with the resistor R5, and the other end of the resistor R20 is connected with the resistor R5, and the other end of the resistor R18 is connected with the resistor 7.
Specifically, the electronic potentiometer 22 and the secondary amplifying subunit 21 are matched to realize 256-level amplifying change of the first acoustic wave electric signal, so that signal amplifying processing of the first acoustic wave electric signal can be satisfied, and the processing of the first acoustic wave electric signal is easier and more convenient.
The integrating subunit 23 includes a capacitor C25 and a resistor R20, one end of the capacitor C25 is connected to the 7 pin of the control chip U5, the other end of the capacitor C25 is connected to one end of the resistor R20 and the input end of the anti-aliasing filtering subunit 24, respectively, and the other end of the resistor R20 is connected to the 2.5V output end.
The first sonic electrical signal processed by the control chip U5 can be subjected to integral compensation through the capacitor C25 and the resistor R20, thereby making the first sonic electrical signal entering the anti-aliasing filtering subunit 24 more stable.
The antialiasing filtering sub-unit 24 comprises a control chip U7, a resistor R21, a resistor R22, a capacitor C26, a capacitor C27, a capacitor C28, a capacitor C29, and a capacitor C30; one end of the resistor R21 is connected to the integrating subunit, the other end of the resistor R21 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to 3 pins of the control chip U7 and one end of the capacitor C28 respectively, the other end of the capacitor C28 is connected to the ground terminal AGND, 2 pins of the control chip U7 are connected to the ground terminal AGND, 5 pins of the control chip U7 are connected to one end of the capacitor C29, one end of the capacitor C20 and 5V output end respectively, the other end of the capacitor C29 and the other end of the capacitor C30 are connected to the ground terminal AGND, 1 pin of the control chip U7 is connected to 4 pins of the control chip U7, one end of the capacitor C27 and one end of the capacitor C26 respectively, the other end of the capacitor C26 and the other end of the capacitor C27 are connected to a connection point of the resistor R21 and the resistor R22 respectively, and the 4 pins of the control chip U7 are connected to the VSO3 output end.
Specifically, the first acoustic wave electric signal after integral compensation is subjected to anti-aliasing filtering treatment by the anti-aliasing filtering subunit 24, so that the background noise of the first acoustic wave electric signal can be suppressed, and the gas leakage of the ultra-high pressure gas pipeline can be monitored more accurately.
In this embodiment, the optional model of the control chip U5 is AD8606, the optional model of the control chip U6 is AD5142-10K, and the optional model of the control chip U7 is AD8605.
Referring to fig. 1 and 8, as an alternative implementation manner of the present embodiment, the filter amplifier further includes a splitting unit 5, an input end of the splitting unit 5 is connected to the filter amplifier unit 2, and an output end of the splitting unit 5 is connected to the control unit 4 and the control center 6 respectively; the splitting unit 5 is configured to split the acoustic wave signal output by the filtering and amplifying unit 2, and transmit the acoustic wave signal output by the filtering and amplifying unit 2.
Specifically, the splitting unit 5 includes a control chip U8, a resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a capacitor C31, a capacitor C32, a capacitor C3, an ADCIN output terminal, and a SIG output terminal; one end of the resistor R24 is connected to the VSO3 output end, the other end of the resistor R24 is connected to the 3 pin of the control chip U8, the 3 pin of the control chip U8 is also connected to one end of the resistor R25, the other end of the resistor R25 is connected to the ground end AGND, the 4 pin of the control chip U8 is connected to the ground end AGND, the 5 pin of the control chip is respectively connected to one end of the resistor R26 and the other end of the resistor R27, the other end of the resistor R27 is connected to the ground end AGND, the other end of the resistor R26 is connected to the VSO3 output end, the 8 pin of the control chip U8 is connected to one end of the capacitor C32, one end of the capacitor C33 and the AVDD output end respectively, the other end of the capacitor C32 and the other end of the capacitor C33 are connected to the ground end AGND, the 1 pin and the 2 pin of the control chip U8 are connected to one end of the resistor R23, the other end of the resistor R23 is respectively connected to one end of the ADCIN output end and the capacitor C31, the other end of the capacitor C31 is connected to the ground end AGND, the other end of the control chip C31 is connected to the other end of the capacitor 6 and the SIG output end of the control chip 7 is connected to the center port.
Specifically, the splitting unit 5 can respectively transmit the first sonic electric signals processed by the control chip U7 to the control unit 4 and the control center 6, and the control unit 4 can adjust the output impedance of the electronic potentiometer 22 and the filtering signal of the first filtering subunit 13 according to the received first sonic electric signals, so that the first sonic electric signals input by the secondary amplifying subunit 21 are more accurate, and the ultra-high pressure gas pipeline infrasonic wave monitoring device is more accurate in monitoring the gas leakage of the ultra-high pressure gas pipeline.
In this embodiment, the control chip U8 has an alternative model AD8606.
Referring to fig. 9, as an alternative implementation of the present embodiment, the control unit 4 includes a control chip U13, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C55, a capacitor C56, a capacitor C57, a capacitor C58, a capacitor C59, a capacitor C60, a resistor R41, a resistor R42, a resistor R43, and a crystal oscillator X1; the VSA pin of the control chip U13 is connected to the ground end AGND, the 1 pin of the control chip U13 is respectively connected to one end of the capacitor C54, one end of the capacitor C55 and the VDD output end, the other end of the capacitor C54 and the other end of the capacitor C55 are both connected to DGND, the 3 pin of the control chip U13 is respectively connected to the 3 pin of the crystal oscillator X1 and one end of the capacitor C53, the other end of the capacitor C53 is respectively connected to the ground end DGND and the 2 pin of the crystal oscillator X1, the 1 pin of the crystal oscillator X1 is respectively connected to the 2 pin of the control chip U13 and one end of the capacitor C52, and the other end of the capacitor C52 is respectively connected to the ground end DGND and the 4 pin of the crystal oscillator X1; the 4 pin of the control chip U13 is respectively connected with one end of the resistor R41 and one end of the capacitor C56, the other end of the resistor R41 is connected with the VDD output end, the other end of the capacitor C56 is connected with the grounding end DGND, the 5 pin of the control chip U13 is respectively connected with one end of the capacitor C57 and one end of the capacitor C58, the other end of the capacitor C57 and the other end of the capacitor C58 are both connected with the grounding end AGND, the 8 pin of the control chip U13 is connected with the ADCIN output end, the 9 pin of the control chip U13 is connected with the SYNC port, the 11 pin of the control chip U13 is connected with the SCLK port, the 12 pin of the control chip U13 is connected with the SDO port, the 13 pin of the control chip U13 is connected with the SDI port, the 15 pin of the control chip U13 is connected with the FCLK port, the 16 pin of the control chip U13 is connected with the POWB port, the 17 pin of the control chip U13 is respectively connected with one end of the capacitor C59, one end of the capacitor C60 and the VDD output end, the other end of the capacitor C59 and the other end of the capacitor C60 are both connected with the grounding end DGND, the VSS pin of the control chip U13 is connected with the grounding end DGND, the 19 pin of the control chip U13 is connected with one end of the resistor R42, the other end of the resistor R42 is respectively connected with the VDD output end and one end of the resistor R43, the other end of the resistor R43 is connected with the 20 pin of the control chip U13, the 19 pin of the control chip U13 is also connected with the TX0 port, the 20 pin of the control chip U13 is also connected with the RX0 port, the control chip U13 is in 485 communication with the outside through the TXO port and the RX0 port, the 22 pin of the control chip U13 is connected with the POWC port, and the 25 pin of the control chip U13 is connected with the POWA port.
Specifically, the crystal oscillator X1 provides a reference clock signal for the control chip U13, and the control chip U13 transmits a control signal to the electronic potentiometer according to the reference clock signal and the received first sonic electric signal, so that the second-stage amplifying subunit 21 amplifies the first sonic electric signal according to the adjusted electronic potentiometer 22, and meanwhile, the control chip U13 controls the triode Q1 to be turned on according to the received first sonic electric signal, so that the first filtering subunit 13 modifies a filtering signal of the control chip U3 according to the requirement of the control chip U13, and the control chip U13 receives the required first sonic electric signal.
In this embodiment, the control chip U13 has an optional model number STM32F051K8U6.
The embodiment of the application also discloses an ultrahigh pressure gas pipeline monitoring system. Referring to fig. 10, the ultra-high pressure gas pipeline monitoring system comprises a pipe wall type acoustic wave monitoring subsystem and a control center 6, wherein the pipe wall type acoustic wave monitoring subsystem comprises a pipe wall type subsonic sensor 7, the pipe wall type subsonic sensor 7 transmits detected second acoustic wave electric signals to the control center 6, and the ultra-high pressure gas pipeline monitoring system further comprises a medium type acoustic wave monitoring subsystem, the medium type acoustic wave monitoring subsystem comprises a plurality of ultra-high pressure gas pipeline subsonic wave monitoring devices arranged inside the ultra-high pressure gas pipeline, and the ultra-high pressure gas pipeline subsonic wave monitoring devices transmit detected first acoustic wave electric signals to the control center 6.
In this embodiment, the medium-type acoustic monitoring subsystem further includes a first transmission assembly 8, the ultra-high pressure gas pipeline infrasonic wave monitoring device is connected with the first transmission assembly 8 in a wireless communication manner, and the first transmission assembly 8 is connected with the control center 6 in a wireless communication manner; the pipe wall type sound wave monitoring subsystem further comprises a second transmission assembly 9, the pipe wall type secondary sound sensor 7 is in wireless communication connection with the second transmission assembly 9, and the second transmission assembly 9 is in wireless communication connection with the control center 6.
As an alternative implementation of this embodiment, the first transmission component 8 and the second transmission component 9 are both internet components.
In this embodiment, the alarm device 10 is further included, and the alarm device 10 is wirelessly connected with the control center 6. When the ultrahigh-pressure gas pipeline leaks, the control center 6 controls the output of the alarm assembly 10.
The implementation principle of the ultra-high pressure gas pipeline monitoring system provided by the embodiment of the application is as follows: when the pipe wall type secondary acoustic sensor 7 detects the second acoustic wave electric signal, the second acoustic wave electric signal is transmitted into the control center 6, meanwhile, the ultra-high pressure gas pipeline secondary acoustic wave monitoring device transmits the monitored first acoustic wave electric signal into the control center 6, the control center 6 compares the first preset acoustic wave electric signal with the first acoustic wave electric signal, meanwhile, the control center 6 compares the second preset acoustic wave electric signal with the second acoustic wave electric signal, when the first preset acoustic wave electric signal is inconsistent with the first acoustic wave electric signal, and the second preset acoustic wave electric signal is inconsistent with the first acoustic wave electric signal, the control center 6 determines that the ultra-high pressure gas pipeline leaks, and determines the leakage point of the ultra-high pressure gas pipeline according to the position of the ultra-high pressure gas pipeline secondary acoustic wave monitoring device, meanwhile, the control center 6 verifies the leakage point according to the position of the pipe wall type secondary acoustic sensor 7, when the pipe wall type monitoring subsystem and the medium type acoustic wave monitoring subsystem are consistent with each other, the control center 6 determines the leakage point to be the real leakage point, and meanwhile, the control center 6 controls the alarm assembly 10 to output the alarm assembly to enable the working personnel to repair the leakage point to quickly.
The embodiment of the application also discloses a method for monitoring the ultra-high pressure gas pipeline, and the main flow of the method is described as follows (steps S101-S105) with reference to FIG. 11:
step S101, acquiring a first acoustic wave electric signal and a second acoustic wave electric signal.
Specifically, the first sonic electrical signal is monitored by an ultra-high pressure gas pipeline infrasonic wave monitoring device; the second sonic electrical signal is monitored by a tube wall type secondary acoustic sensor 7 provided on the outer wall of the ultra-high pressure gas tube.
Because the ultra-high pressure gas pipeline infrasonic wave monitoring device is arranged inside the ultra-high pressure gas pipeline, the first sonic electric signal monitored by the ultra-high pressure gas pipeline infrasonic wave monitoring device is generated during transportation of the ultra-high pressure gas in the ultra-high pressure gas pipeline; because the pipe wall type secondary acoustic sensor 7 is fixedly connected with the outer wall of the ultrahigh pressure gas pipeline, the second sonic electric signal is that the ultrahigh pressure gas collides with the inner wall of the ultrahigh pressure gas pipeline, so that the ultrahigh pressure gas pipeline vibrates and generates a second sonic signal, and the pipe wall type secondary acoustic sensor 7 monitors the second sonic signal generated by the ultrahigh pressure gas pipeline and converts the second sonic signal into the second sonic electric signal.
Step S102, performing anomaly analysis on the ultra-high pressure gas pipeline according to the first sonic electric signal to obtain a first analysis result.
As an optional implementation manner of this embodiment, performing data analysis on the first acoustic wave electric signal to obtain a first analysis result includes:
extracting a first sonic characteristic of the first sonic electrical signal;
comparing the first preset sound wave characteristics with the first sound wave characteristics;
if the first preset sound wave characteristics are inconsistent with the first sound wave characteristics, the first analysis result is abnormal;
specifically, the first sonic characteristic includes a peak value and a frequency, when the ultrahigh pressure gas pipeline leaks, the first sonic characteristic is compared with the first preset sonic characteristic, the peak value of the first sonic signal is increased, the frequency is increased, and at the moment, the first sonic electric signal is determined to be abnormal, namely, the ultrahigh pressure gas pipeline is abnormal.
Step S103, performing anomaly analysis on the ultra-high pressure gas pipeline according to the second sonic electric signal to obtain a second analysis result;
as an optional implementation manner of this embodiment, performing data analysis on the second sonic electric signal to obtain a second analysis result includes:
extracting a second sonic characteristic of the second sonic electrical signal;
comparing the second preset sound wave characteristics with the second sound wave characteristics;
if the second preset sound wave characteristics are inconsistent with the second sound wave characteristics, the second analysis result is abnormal.
Specifically, the second sonic characteristics include peak values and frequencies, when the ultrahigh pressure gas pipeline leaks, the second sonic characteristics are compared with the second preset sonic characteristics, the peak values of the second sonic signals become larger, the frequencies become larger, and at the moment, the second sonic electrical signals are determined to be abnormal, namely the ultrahigh pressure gas pipeline is abnormal.
And step S104, if the first analysis result and the second analysis result are abnormal, determining that the ultrahigh-pressure gas pipeline leaks.
In this embodiment, when the first analysis result is abnormal and the second analysis result is normal, the first acoustic wave electric signal monitored by the medium acoustic wave monitoring subsystem is abnormal, but the second acoustic wave electric signal monitored by the pipe wall type secondary acoustic sensor 7 is not abnormal, at this time, the impurity may flow into the ultrahigh pressure gas pipe to cause the first acoustic wave electric signal to be abnormal, and the impurity does not affect the second acoustic wave signal generated by the ultrahigh pressure gas pipe, so that the leakage of the ultrahigh pressure gas pipe cannot be determined at this time.
When the first analysis result is normal and the second analysis result is abnormal, the first sonic electric signal monitored by the medium sonic monitoring subsystem is unchanged, and because the pipe wall type secondary acoustic sensor 7 is fixed outside the ultrahigh pressure gas pipeline and the ultrahigh pressure gas pipeline is installed underground, when a running vehicle passes on the ground, the pipe wall type secondary acoustic sensor 7 detects that the vehicle passes above the ultrahigh pressure gas pipeline to cause ground vibration, so that the second sonic electric signal is abnormal, but the ultrahigh pressure gas pipeline is not leaked at the moment, and misinformation of the pipe wall type monitoring subsystem and the medium type subsystem is caused.
When the first analysis result and the second analysis result are abnormal, namely the medium type acoustic wave monitoring subsystem and the pipe wall type acoustic wave monitoring subsystem monitor abnormal conditions, the first acoustic wave electric signal and the second acoustic wave electric signal are changed, and leakage of the ultrahigh pressure gas pipeline can be determined.
Step S105, locating a leakage point on the ultra-high pressure gas pipeline based on the first sonic electrical signal and/or the second sonic electrical signal.
As an alternative implementation manner of this embodiment, locating the leakage point on the ultra-high pressure gas pipeline based on the first sonic electrical signal includes:
acquiring a first moment and a second moment of a first acoustic wave electric signal, wherein the first moment and the second moment are the earliest two moments when the first acoustic wave electric signal is abnormal;
acquiring a first position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to a first moment and a second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to a second moment;
the leak is located based on the first location and the second location.
Specifically, when the ultrahigh-pressure gas pipeline is determined to leak, the control center obtains all moments of the first sonic electric signal, generates a timetable, and determines a first moment and a second moment for obtaining the first sonic electric signal according to the timetable, wherein the first moment and the second moment are the earliest two moments in the timetable.
In this embodiment, a first position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to a first moment and a second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to a second moment are obtained; and the first position and the second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device are pre-stored through a system, and/or the first position and the second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device are monitored through a GPS.
After the first position and the second position are acquired, the leakage point can be determined to be between the two ultra-high pressure gas pipeline infrasound monitoring devices.
As an alternative implementation of this embodiment, locating the leakage point on the ultra-high pressure gas pipeline based on the second sonic electrical signal includes:
acquiring second sonic electric signals detected by at least two pipe wall type secondary acoustic sensors 7;
acquiring the phases of at least two abnormal wave bands of the second sonic electric signals in the second sonic signals;
the position of the leak point is calculated based on the phase of the abnormal band in the second sonic electrical signal.
Specifically, taking two second acoustic wave electric signals as examples, the formula of the second acoustic wave electric signals is:
wherein f s ＝50HZ，A＝3300mv，n＝1,2,3…N，N＝50，f＝1HZ，
First order difference is performed on the X1 signal:
d 11(k) ＝X1(K)-X1(K+1)
wherein k=1, 2,3 … N-2;
d 12(k) ＝X1(K+1)-X1(K+2)
Where k=1, 2,3 … N-2.
Performing M-point equidistant forward and backward interpolation on X2 to obtain sequences X21 and X22 of different interpolation points:
X11(j，k)＝X1(k+1)+j*d 11(k)
wherein k=1, 2,3 … N-2, j=1, 2,3 … M-1;
X12(j，k)＝X1(k+1)+j*d 12(k)
wherein k=1, 2,3 … N-2, j=1, 2,3 … M-1;
and respectively calculating the cross-correlation coefficients between X2 and X11 and between X2 and X12 to obtain a total cross-correlation coefficient curve, and distinguishing the phase difference of the signals according to the total cross-correlation coefficient curve so as to determine the position of the leakage point according to the phase difference.
The foregoing description of the preferred embodiments of the application is not intended to limit the scope of the application in any way, including the abstract and drawings, in which case any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Claims (9)
1. The ultra-high pressure gas pipeline infrasonic wave monitoring device is characterized by comprising a signal acquisition unit (1), a filtering and amplifying unit (2), a power supply unit (3), a control unit (4) and a splitting unit (5), wherein the input end of the power supply unit (3) is connected with an external power supply, the output end of the power supply unit (3) is respectively connected with the signal acquisition unit (1), the filtering and amplifying unit (2) and the control unit (4), and the signal acquisition unit (1), the filtering and amplifying unit (2) and the control unit (4) are connected in series;
The signal acquisition unit (1) is used for acquiring a first sonic signal generated by ultrahigh-pressure gas in ultrahigh-pressure gas pipeline transportation and converting the first sonic signal into a first sonic electric signal;
the filtering and amplifying unit (2) is used for performing anti-aliasing filtering and amplifying on the first sonic electric signal;
the power supply unit (3) is used for providing power for the signal acquisition unit (1), the filtering and amplifying unit (2) and the control unit (4);
the control unit (4) is used for receiving the first sonic electric signal converted by the signal acquisition unit (1), processing the first sonic electric signal and outputting the first sonic electric signal to the control center (6);
the input end of the splitting unit (5) is connected with the filtering amplifying unit (2), and the output end of the splitting unit (5) is respectively connected with the control unit (4) and the control center (6); the splitting unit (5) is used for splitting the sound wave signals output by the filtering and amplifying unit (2) and transmitting the sound wave signals output by the filtering and amplifying unit (2);
the control unit (4) is used for adjusting parameters of the signal acquisition unit (1) and the filtering amplification unit (2) based on the sonic wave signals transmitted by the splitting unit (5).
2. Ultra-high pressure gas pipeline infrasound monitoring device according to claim 1, characterized in that the power supply unit (3) comprises a first power supply unit (31), a second power supply unit (32), a third power supply unit (33) and a fourth power supply unit (34), the input ends of the first power supply unit (31), the second power supply unit (32) and the fourth power supply unit (34) are all connected to an external power supply, the output ends of the first power supply unit (31) are respectively connected to the signal acquisition unit (1), the filtering amplification unit (2) and the control unit (4), the output ends of the second power supply unit (32) are respectively connected to the signal acquisition unit (1), the filtering amplification unit (2) and the control unit (4), and the output ends of the third power supply unit (33) and the output ends of the fourth power supply unit (34) are all connected to the control unit (4).
3. Ultra-high pressure gas pipeline infrasonic wave monitoring device according to claim 1 or 2, characterized in that the filtering and amplifying unit (2) comprises a secondary amplifying subunit (21), an electronic potentiometer (22), an integrating subunit (23) and an anti-aliasing filtering subunit (24), wherein the input end of the secondary amplifying subunit (21) is respectively connected to the electronic potentiometer (22) and the signal acquisition unit (1), the output end of the secondary amplifying subunit (21) is connected to the input end of the integrating subunit (23), the output end of the integrating subunit (23) is connected to the input end of the anti-aliasing filtering subunit (24), and the output end of the anti-aliasing filtering subunit (24) is connected to the control unit (4).
4. An ultra-high pressure gas pipeline monitoring system, comprising a pipe wall type sound wave monitoring subsystem and a control center (6), wherein the pipe wall type sound wave monitoring subsystem comprises a pipe wall type subsonic sensor (7), and the pipe wall type subsonic sensor (7) transmits detected second sound wave electric signals to the control center (6), and the ultra-high pressure gas pipeline monitoring system is characterized by further comprising a medium type sound wave monitoring subsystem, wherein the medium type sound wave monitoring subsystem comprises a plurality of ultra-high pressure gas pipeline subsonic wave monitoring devices which are arranged inside an ultra-high pressure gas pipeline and are used for transmitting detected first sound wave electric signals to the control center (6).
5. A method for monitoring an ultra high pressure gas pipeline, applied to a control center (6), the method comprising:
acquiring a first acoustic wave electric signal and a second acoustic wave electric signal, wherein the first acoustic wave electric signal is monitored by the ultra-high pressure gas pipeline infrasonic wave monitoring device according to any one of claims 1 to 3, and the second acoustic wave electric signal is monitored by a pipe wall type infrasonic wave sensor (7) arranged on the outer wall of the ultra-high pressure gas pipeline;
performing anomaly analysis on the ultra-high pressure gas pipeline according to the first sonic electric signal to obtain a first analysis result;
Performing abnormal analysis on the ultra-high pressure gas pipeline according to the second sonic electric signal to obtain a second analysis result;
and if the first analysis result and the second analysis result are abnormal, determining that the ultrahigh-pressure gas pipeline leaks.
6. The method of claim 5, wherein performing data analysis on the first sonic electrical signal to obtain a first analysis result comprises:
extracting a first sonic characteristic of the first sonic electrical signal;
comparing a first preset sound wave characteristic with the first sound wave characteristic;
if the first preset sound wave characteristics are inconsistent with the first sound wave characteristics, the first analysis result is abnormal; and/or the number of the groups of groups,
performing data analysis on the second sonic electrical signal to obtain a second analysis result, wherein the second analysis result comprises:
extracting a second sonic characteristic of the second sonic electrical signal;
comparing a second preset sound wave characteristic with the second sound wave characteristic;
if the second preset sound wave characteristics are inconsistent with the second sound wave characteristics, the second analysis result is abnormal.
7. The method of claim 5, further comprising, after said determining that said ultra-high pressure gas conduit is leaking:
And positioning a leakage point on the ultra-high pressure gas pipeline based on the first sonic electric signal and/or the second sonic electric signal.
8. The method of claim 7, wherein locating the leak point on the ultra-high pressure gas pipeline based on the first sonic electrical signal comprises:
acquiring a first moment and a second moment of the first sonic electric signal, wherein the first moment and the second moment are the earliest two moments when the first sonic electric signal is abnormal;
acquiring a first position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to the first moment and a second position of the ultra-high pressure gas pipeline infrasonic wave monitoring device corresponding to the second moment;
and positioning the leakage point based on the first position and the second position.
9. The method of claim 7, wherein locating the leak point on the ultra-high pressure gas pipeline based on the second sonic electrical signal comprises:
acquiring second sonic electric signals detected by at least two pipe wall type secondary acoustic sensors (7);
Acquiring phases of abnormal wave bands of the at least two second sonic electric signals in the second sonic electric signals;
and calculating the position of the leakage point based on the phase of the abnormal wave band in the second sonic electric signal.
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