CN114935116A - Infrasonic wave monitoring device, monitoring system and monitoring method for ultrahigh pressure gas pipeline - Google Patents
Infrasonic wave monitoring device, monitoring system and monitoring method for ultrahigh pressure gas pipeline Download PDFInfo
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- CN114935116A CN114935116A CN202210546292.3A CN202210546292A CN114935116A CN 114935116 A CN114935116 A CN 114935116A CN 202210546292 A CN202210546292 A CN 202210546292A CN 114935116 A CN114935116 A CN 114935116A
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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
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Abstract
The application relates to a super-high pressure gas pipe pass acoustic wave monitoring device, a monitoring system and a method, which relate to the technical field of gas pipeline monitoring and comprise a signal acquisition unit, a filtering amplification 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 amplification unit and the control unit, and the signal acquisition unit, the filtering amplification unit and the control unit are connected in series; the signal acquisition unit is used for acquiring a first sound wave signal generated by the ultrahigh pressure gas in the ultrahigh pressure gas pipeline transportation and converting the first sound wave signal into a first sound wave 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 sound wave electric signal converted by the signal acquisition unit and outputting the first sound wave electric signal to the control center. This application has the effect that realizes the gas leakage monitoring to super high pressure gas pipeline.
Description
Technical Field
The application relates to the technical field of gas pipeline monitoring, in particular to a super-high pressure gas pipe pass acoustic wave monitoring device, system and method.
Background
At present, pipeline transportation is the main form in the gas transportation system in China, the function of the pipeline transportation in the comprehensive transportation system is more and more prominent, and the influence on the healthy development of economy in China is more and more obvious.
In recent years, along with economic development, monitoring of ultrahigh pressure gas pipelines is more and more emphasized, for example, transportation pipelines of oil field gas storage, dozens of ultrahigh pressure gas pipelines of an oil field gas storage operation area are in an industrial park, which belongs to a high risk area, and very many enterprises and residents are in the industrial park, because the pressure in the transportation pipelines of the gas storage is generally in a range of 20-30 MPa, which belongs to an ultrahigh pressure state, once the pipelines leak, not only pipeline stop is caused, huge economic loss is brought, and the environment is damaged.
At present, a gas transportation pipeline is usually monitored by adopting a sound wave detection method, but the conventional sound wave monitoring device generally works at about 15MPa, and cannot monitor an ultrahigh pressure gas pipeline.
Disclosure of Invention
In order to realize gas leakage monitoring of an ultrahigh pressure gas pipeline, the application provides an ultrahigh pressure gas pipeline pass acoustic wave monitoring device, a monitoring system and a method.
In a first aspect, the application provides a super-pressure gas pipe pass acoustic wave monitoring device, which adopts the following technical scheme: the ultrahigh-pressure gas pipe pass acoustic wave monitoring device comprises a signal acquisition unit, a filtering amplification 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 amplification unit and the control unit, and the signal acquisition unit, the filtering amplification unit and the control unit are connected in series;
the signal acquisition unit is used for acquiring a first sound wave signal generated by the ultrahigh pressure gas in the ultrahigh pressure gas pipeline transportation and converting the first sound wave signal into a first sound wave 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 amplification unit and the control unit;
the control unit is used for receiving the first sound wave electric signal converted by the signal acquisition unit, processing the first sound wave electric signal and outputting the first sound wave electric signal to the control center.
Through adopting above-mentioned technical scheme, the first sound wave signal that the signal acquisition unit will gather turns into first sound wave signal of telecommunication into, then with the anti-aliasing filtering and the amplification processing of first sound wave signal of telecommunication through filtering amplification unit, later with first sound wave signal of telecommunication transmission to the control unit, the control unit handles the first sound wave signal of telecommunication of receiving and transmits to control center, utilize the signal acquisition unit to carry out real-time collection to the sound wave signal of superhigh pressure gas pipeline, thereby realize the monitoring to the gaseous pipeline of superhigh pressure.
Optionally, the power supply unit includes first power supply subunit, second power supply subunit, third power supply subunit and fourth power supply subunit, the input of first power supply subunit, second power supply subunit and fourth power supply subunit all is connected in outside power supply, the output of first power supply subunit connect respectively in the signal acquisition unit the filtering amplification unit with the control unit, the output of second power supply subunit connect respectively in the signal acquisition unit the filtering amplification unit with the control unit, the output of third power supply subunit with the output of fourth control subunit all connect in the control unit.
By adopting the technical scheme, the power supply unit provides working voltage for the signal acquisition unit, the filtering amplification unit and the control unit, so that the signal acquisition unit, the filtering amplification unit and the control unit work normally, and the ultrahigh-pressure gas pipe pass acoustic wave monitoring device can better monitor gas leakage of an ultrahigh-pressure gas pipeline.
Optionally, the filtering and amplifying unit includes a secondary amplifying subunit, an electronic potentiometer, an integrating subunit and an anti-aliasing filtering subunit, an input end of the secondary amplifying subunit is connected to the electronic potentiometer and the signal acquisition unit, an output end of the secondary amplifying subunit is connected to an input end of the integrating subunit, an output end of the integrating subunit is connected to an input end of the anti-aliasing filtering subunit, and an output end of the anti-aliasing filtering subunit is connected to the control unit.
By adopting the technical scheme, the second-stage amplification subunit amplifies the first sonic electric signal, the control unit can conveniently process the first sonic electric signal, and then the anti-aliasing filtering subunit performs thinning gain and anti-aliasing filtering on the first sonic electric signal, so that the suppression of background noise in the first sonic electric signal is realized, and the ultrahigh-pressure gas pipe pass acoustic wave monitoring device is adaptive to the monitoring of gas leakage in an ultrahigh-pressure gas pipe.
Optionally, the system further comprises a splitting unit, an input end of the splitting unit is connected to the filtering and amplifying unit, and an output end of the splitting unit is respectively connected to 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.
By adopting the technical scheme, the splitting unit can respectively transmit the first sound wave electric signals processed by the filtering and amplifying unit to the control unit and the control center, and the control unit can adjust the parameters of the filtering and amplifying unit and the signal acquisition unit according to the received first sound wave electric signals, so that the first sound wave electric signals received by the control center are more accurate, and further, the ultrahigh-pressure gas pipe pass sound wave monitoring device can monitor the gas leakage of the ultrahigh-pressure gas pipeline more accurately.
In a second aspect, the present application provides an ultrahigh pressure gas pipeline monitoring system, which adopts the following technical scheme:
the utility model provides an ultrahigh pressure gas pipeline monitoring system, includes pipe wall formula sound wave monitoring subsystem and control center, pipe wall formula sound wave monitoring subsystem includes pipe wall formula infrasound sensor, pipe wall formula infrasound sensor will detect the second sound wave signal of telecommunication transmit to control center still includes medium formula sound wave monitoring subsystem, medium formula sound wave monitoring subsystem include a plurality of set up inside the ultrahigh pressure gas pipeline as the first aspect ultrahigh pressure gas pipe pass sound wave monitoring devices, ultrahigh pressure gas pipeline infrasound wave monitoring devices will detect first sound wave signal of telecommunication transmit to control center.
Through adopting above-mentioned technical scheme, the second sound wave signal of telecommunication transmission to the control center that pipe wall formula secondary sensor will detect, the super high pressure gas pipeline infrasonic wave monitoring devices simultaneously with the first sound wave signal transmission to the control center that detects, the control center is according to first sound wave signal of telecommunication and second sound wave signal of telecommunication to carrying out real-time supervision to super high pressure gas pipeline gas leakage to reduce the possibility of wrong report or 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 ultrahigh pressure gas pipeline monitoring method is applied to a control center, and comprises the following steps:
acquiring a first sonic electric signal and a second sonic electric signal, wherein the first sonic electric signal is detected by the ultrahigh-pressure gas pipe pass acoustic wave monitoring device in the first aspect, and the second sonic electric signal is detected by a pipe wall type infrasound sensor arranged on the outer wall of the ultrahigh-pressure gas pipe;
carrying out anomaly analysis on the ultrahigh pressure gas pipeline according to the first sonic electric signal to obtain a first analysis result;
performing anomaly analysis on the ultrahigh 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 both abnormal, determining that the ultrahigh pressure gas pipeline leaks.
By adopting the technical scheme, the control center carries out abnormity analysis on the first sound wave electric signal and the second sound wave electric signal in real time, and when the first sound wave electric signal and the second sound wave electric signal are detected to be abnormal, the control center judges that the ultrahigh pressure gas pipeline leaks.
Optionally, the performing data analysis on the first sonic electrical signal to obtain a first analysis result includes:
extracting a first sound wave characteristic of the first sound wave electric signal;
comparing a first preset sonic feature with the first sonic feature;
if the first preset sound wave characteristic is inconsistent with the first sound wave characteristic, the first analysis result is abnormal; and/or, the data analysis of the second sound wave signal to obtain a second analysis result comprises:
extracting a second sound wave feature of the second sound wave electric signal;
comparing a second preset sonic feature with the second sonic feature;
and if the second preset sound wave characteristic is not consistent with the second sound wave characteristic, the second analysis result is abnormal.
Optionally, after it is determined that the ultrahigh-pressure gas pipeline leaks, the method further includes:
and positioning the leakage point on the ultrahigh pressure gas pipeline based on the first sonic electric signal and/or the second sonic electric signal.
Optionally, the locating the leakage point on the ultrahigh 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 ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to the first moment and a second position of the ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to the second moment;
a leak is located based on the first and second positions.
Optionally, the positioning the leakage point on the ultrahigh pressure gas pipeline based on the second sonic electrical signal includes:
acquiring second sonic electric signals detected by at least two pipe wall type infrasound sensors;
acquiring the phases of the abnormal wave bands of the at least two second sonic electric signals in the second sonic electric signals;
the position of the leak is calculated based on the phase of the abnormal 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 sound wave signal into a first sound wave electric signal, then the first sound wave electric signal is subjected to anti-aliasing filtering and amplification processing by the filtering amplification unit, the first sound wave electric signal is transmitted to the control unit, the control unit processes the received first sound wave electric signal and transmits the processed first sound wave electric signal to the control center, and the signal acquisition unit is used for acquiring the sound wave signal of the ultrahigh pressure gas pipeline in real time, so that the ultrahigh pressure gas pipeline is monitored;
2. the amplifying subunit amplifies the first sonic electrical signal, so that the control unit can process the first sonic electrical signal conveniently, and then the anti-aliasing filtering subunit performs refined gain and anti-aliasing filtering on the first sonic electrical signal, so that suppression of background noise in the first sonic electrical signal is realized, and the ultrahigh-pressure gas pipe pass acoustic wave monitoring device is adaptive to monitoring of gas leakage in an ultrahigh-pressure gas pipeline;
3. the pipe wall type secondary sensor transmits a second sound wave electric signal to the control center, the ultra-high pressure gas pipeline infrasonic wave monitoring device transmits a first sound wave 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 sound wave electric signal and the second sound wave electric signal, so that the possibility of misinformation or missing report is reduced.
Drawings
Fig. 1 is a structural block diagram of an infrasonic wave monitoring device of an ultrahigh-pressure gas pipeline in the embodiment of the present application.
Fig. 2 is a schematic circuit diagram of a first power supply electronic unit of an ultrahigh-pressure gas transistor pass acoustic wave monitoring device in an embodiment of the present application.
Fig. 3 is a schematic circuit diagram of a second power supply electronic unit of the infrasonic wave monitoring device for the ultra-high pressure gas pipeline in the embodiment of the present application.
Fig. 4 is a schematic circuit diagram of a third power supply electronic unit of the infrasonic wave monitoring device for the ultra-high pressure gas pipeline in the embodiment of the present application.
Fig. 5 is a schematic circuit diagram of a fourth power supply electronic unit of the infrasonic wave monitoring device for the ultra-high pressure gas pipeline in the embodiment of the present application.
Fig. 6 is a schematic circuit diagram of a signal acquisition unit of the infrasonic wave monitoring device for the ultra-high pressure gas pipeline in the embodiment of the present application.
Fig. 7 is a schematic circuit diagram of a filtering and amplifying unit of the ultrahigh-pressure gas tube pass acoustic wave monitoring device in the embodiment of the present application.
Fig. 8 is a schematic circuit diagram of a splitting unit of the ultrahigh-pressure gas tube pass acoustic wave monitoring device in the embodiment of the present application.
Fig. 9 is a schematic circuit diagram of a control unit of the infrasonic wave monitoring device for the ultra-high pressure gas pipeline in the embodiment of the present application.
Fig. 10 is a block diagram of the structure of the monitoring system for the ultrahigh-pressure gas pipeline in the embodiment of the present application.
Fig. 11 is a schematic flow chart of a method for monitoring an ultrahigh-pressure gas pipeline in an embodiment of the present application.
Description of reference numerals: 1. a signal acquisition unit; 11. a primary amplification subunit; 12. a first follower subunit; 13. a first filtering subunit; 14. a second follower subunit; 2. a filtering amplification unit; 21. a secondary amplification subunit; 22. an electronic potentiometer; 23. an integrator unit; 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 supply electronic unit; 4. a control unit; 5. a splitting unit; 6. a control center; 7. a tube wall infrasound sensor; 8. a first transmission assembly; 9. 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 is further described in detail below with reference to fig. 1-11 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses a super-pressure gas pipe pass acoustic wave monitoring device. Referring to fig. 1, the ultra-high pressure gas pipe pass acoustic wave monitoring device comprises a signal acquisition unit 1, a filtering amplification unit 2, a power supply unit 3 and a control unit 4, wherein the input end of the power supply unit 3 is connected to an external power supply, the output end of the power supply unit 3 is respectively connected to the signal acquisition unit 1, the filtering amplification unit 2 and the control unit 4, and the signal acquisition unit 1, the filtering amplification 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 and 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 a power supply for the signal acquisition unit 1, the filtering and amplifying unit 2 and the control unit 4, and the control unit 4 is used for receiving the first sound wave electric signal converted by the signal acquisition unit 1 and processing the first sound wave electric signal and outputting the first sound wave electric signal to the control center 6.
In this 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, 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 end of the first power supply unit 31 is respectively connected to the signal acquisition unit 1, the filtering amplification unit 2 and the control unit 4, the output end of the second power supply unit 32 is respectively connected to the signal acquisition unit 1, the filtering amplification unit 2 and the control unit 4, and the output end of the third power supply unit 33 and the output end of the fourth power supply unit 34 are both connected to the control unit 4.
In the present embodiment, the external power supply can provide a 6V power supply and a-9V power supply.
Referring to fig. 1 and 2, in particular, the first power supply electronic 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 pin of the control chip U9 is connected to a 6V power supply, the 6 pin of the control chip U9 is 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 ground terminal PGND, the other end of the capacitor C37 is connected to the 6V power supply, the 5 pin of the control chip U9 is connected to a POWC port, the POWC port is connected to the control unit 4, the 1 pin of the control chip U9 is connected to one end of the capacitor C35, one end of a resistor R28, one end of the capacitor C34 and a 2.5V output terminal, the other end of the capacitor C35 is connected to the 2 pin of the control chip U9, the other end of the resistor R28 is connected to the 2 pin of the control chip U9, the other end of the capacitor C34 is connected to one end of the resistor R30 and the ground terminal PGND, and the other end of the resistor R30 is connected to the ground terminal 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 pin of the control chip U10 is connected to a 6V power supply, the 6 pin of the control chip U10 is 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 ground terminal PGND, the other end of the capacitor C41 is connected to the 6V power supply, the 5 pin of the control chip U10 is connected to a POWA port, the POWA port is connected to the control unit 4, the 1 pin of the control chip U10 is connected to one end of the capacitor C39, one end of a resistor R31, one end of the capacitor C38 and a 5V output terminal, the other end of the capacitor C39 is connected to the 2 pin of the control chip U10, the other end of the resistor R31 is connected to the 2 pin of the control chip U10, the other end of the capacitor C38 is connected to one end of the resistor R33 and the ground terminal PGND, and the other end of the resistor R33 is connected to the ground terminal AGND.
Referring to fig. 1 and 4, the third power supply electronic 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; an 8 pin of the control chip U11 is connected to a-9V power supply, a 6 pin of the control chip U11 is connected to one end of a capacitor C44, the other end of the capacitor C44 is connected to one end of a capacitor C45 and a ground terminal PGND respectively, the other end of the capacitor C45 is connected to the-9V power supply, a 5 pin of the control chip U11 is connected to a POWB port, the POWB port is connected to the control unit, a 1 pin of the control chip U11 is connected to one end of the capacitor C43, one end of a resistor R34, one end of the capacitor C42 and a-2.5V output terminal, the other end of the capacitor C43 is connected to a 2 pin of the control chip U11, the other end of the resistor R34 is connected to a 2 pin of the control chip U11, the other end of the capacitor C42 is connected to one end of the resistor R36 and the ground terminal PGND, and the other end of the resistor R36 is connected to the ground terminal AGND.
Referring to fig. 1 and 5, the fourth supply electronic 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; pin 1 of the control chip U12 is connected to pin 3 of the control chip U12, pin 1 of the capacitor C46, pin 2 of the capacitor C47 and a 6V power supply, pin 2 of the capacitor C46, the capacitor C47 and the control chip U12 are connected to a ground terminal PGND, pin 4 of the control chip U12 is connected to pin 4 of the capacitor C49, the other end of the capacitor C49 is connected to pin 3 of the capacitor R39, pin R40 and pin 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 pin AGND, pin 5 of the control chip U12 is connected to pin 5 of the capacitor C49, pin R37 and pin R38, the other end of the resistor R37 is connected to pin AVDD and pin C51, the other end of the capacitor C51 is connected to pin AGND, the other end of the resistor R38 is connected to pin and pin VDD of the capacitor C50, the other end of capacitor C50 is connected to ground DGND.
Specifically, the control chip U9 can convert a 6V power supply into a 2.5V output power supply to meet the power consumption requirements of the filtering amplification unit 2, the signal acquisition unit 1 and the control unit 4; the control chip U10 can convert the 6V power supply unit into a 5V output power supply to meet the power consumption requirements of the filtering amplification 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 the VDD reference voltage and the AVDD reference voltage to meet the operation requirements of the filtering and amplifying unit 2 and the control unit 4.
In this embodiment, the selectable model of the control chip U9 is TPS7a4901, the selectable model of the control chip U10 is TPS7a4901, the selectable model of the control chip U10 is TPS7a3001, and the selectable model of the control chip U12 is SPX 3819-3.3.
Referring to fig. 1 and fig. 6, as an alternative implementation manner of this embodiment, the signal acquisition unit 1 includes a primary amplification subunit 11, a first following subunit 12, a first filtering subunit 13, and a second following subunit 14; the input end of the first-order amplification subunit 11 is connected with a piezoelectric diaphragm CON1, the piezoelectric diaphragm CON1 is used for converting the detected first sound wave signal into a first sound wave electric signal, the output end VSO1 of the first-order amplification subunit 11 is connected to the input end of the first follower subunit 12, the output end of the first follower subunit 12 is connected to the input end of the first filtering subunit 13, the output end of the first filtering subunit 13 is connected to the input end of the second follower subunit 14, and the output end of the second follower subunit 14 is connected to the filtering amplification unit 2.
In the present embodiment, the primary amplification subunit 11 includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a resistor R1, a resistor R1A, a resistor R2, and a control chip U1; pins 1 and 3 of the piezoelectric diaphragm CON1 are connected to a ground terminal AGND, pin 2 of the piezoelectric diaphragm CON1 is connected to one end of a capacitor C1, the other end of the capacitor C1 is connected to pin 8 of a control chip U1, pin 7 of the control chip U1 is connected to one end of a capacitor C4, one end of a capacitor C3 and the ground terminal AGND, the other end of the capacitor C4, the other end of the capacitor C3 and pin 6 of the control chip U1 are connected to a 2.5V output terminal, pin 3 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, the other end of the capacitor C5 and the other end of the capacitor C6 are connected to the ground terminal AGND, pin 1 and pin 2 of the control chip U1 are connected to the ground terminal AGND, pin 4 of the control chip is connected to one end of a resistor R2, the other end of the resistor R2 is connected to one end of a resistor R1A, and the other end of the resistor R1, One end of the capacitor C2 and an output terminal VSO1, the other end of the resistor R1A is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the 8 pin of the control chip U1, the other end of the capacitor C2 is connected to the 2 pin of the piezoelectric diaphragm CON1, and the output terminal VSO1 is connected to the first follower unit 12.
Specifically, piezoelectric diaphragm CON1 can bear the pressure of gas in the superhigh pressure gas pipeline, and can gather because the first sound wave signal that gas produced in the transportation of superhigh pressure gas pipeline in the superhigh pressure gas pipeline, and convert first sound wave signal into first sound wave signal of telecommunication, transmit to control chip U1 in, amplify first sound wave signal of telecommunication through control chip U1, make filtering amplification unit 2 filter and amplify first sound wave signal of telecommunication 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 C7, a capacitor C8, a capacitor C9, and a capacitor C10; the output end VSO1 is connected to one end of the 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 terminal AGND, the 3 pin of the control chip U2 is connected to one end of the capacitor C10, one end of the resistor R7 and one end of the resistor R6, the other end of the capacitor C10 and the other end of the resistor R7 are both connected to the ground terminal AGND, and the other end of the resistor R6 is connected to the 2.5V output end; the 5 pins of the control chip U2 are connected to one end of the capacitor C7, one end of the capacitor C8 and the 5V output end respectively, the other end of the capacitor C7 and the other end of the capacitor C8 are both connected to the ground terminal AGND, the 1 pin of the control chip U2 is connected to one end of the capacitor C9 and one end of the resistor R4 respectively, the other end of the resistor R4 is connected to the 4 pins of the control chip U2, the other end of the capacitor C9 is connected to one end of the resistor R5 and the input end of the first filtering subunit 13 respectively, and the other end of the resistor R5 is connected to the 2.5V output end.
Specifically, the control chip U2 follows and isolates the first sonic electrical signal processed by the control chip U1, so that the processing of the first sonic electrical signal by the filtering and amplifying unit 2 does not affect the processing of the first sonic electrical 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 C11, a capacitor C12, a capacitor C13, and a transistor Q1; one end of a resistor R8 is connected to a capacitor C9, the other end of a resistor R8 is connected to a pin 2 of a control chip U3, a pin 1 of the control chip U3 is connected to one end of a capacitor C11 and a pin 6 of a control chip U3, a pin 3 of the control chip U3 is connected to one end of the capacitor C13, one end of a capacitor C12 and a ground terminal AGND, the other end of the capacitor C12 and the other end of a capacitor C13 are connected to a 5V output terminal, a pin 4 and a pin 7 of the control chip U3 are connected to the 5V output terminal, a pin 8 of the control chip U3 is connected to one end of a resistor R10, the other end of the resistor R10 is connected to one end of a resistor R9 and a collector of a triode Q1, the other end of the resistor R9 is connected to the 5V output terminal, a base of a triode Q1 is connected to one end of a resistor R11, the other end of the resistor R11 is connected to an FCport, the FCLK port is connected to the control unit, the emitter of the transistor Q1 is connected to the ground DGND, and the 5 pin of the control chip U3 is connected to the second follower subunit 14.
Specifically, the control chip U3 filters the isolated first sonic electrical signal according to the control signal of the control unit 4, so that the isolated first sonic electrical signal is more stable and accurate.
The second follower subunit 14 comprises a control chip U4, a capacitor C14 and a capacitor C15, wherein a pin 3 of the control chip U4 is connected to a pin 5 of the control chip U3, a pin 2 of the control chip U4 is connected to a ground terminal AGND, a pin 1 of the control chip U4 is connected to a pin 4 of the control chip U4, a pin 5 of the control chip U4 is connected to one end of a capacitor C14, one end of the capacitor C15 and a 5V output terminal, the other end of the capacitor C14 and the other end of the capacitor C15 are both connected to the ground terminal AGND, and a pin 4 of the control chip U4 is connected to a VSO2 output terminal.
Specifically, the control chip U4 isolates and follows the input first sonic electrical signal, so that the first sonic electrical signal output by the control chip U3 is not affected when the first sonic electrical signal output by the control chip U4 is processed.
In this embodiment, the selectable model of the control chip U1 is LMP7721, the selectable models of the control chip U2 and the control chip U4 are both AD8605, and the selectable model of the control chip U3 is MAX 7480.
Referring to fig. 1 and 7, in this embodiment, the filtering and amplifying unit 2 includes a secondary amplifying subunit 21, an electronic potentiometer 22, an integrating subunit 23, and an anti-aliasing filtering subunit 24, an input end of the secondary amplifying subunit 21 is connected to the electronic potentiometer 22 and the signal acquisition unit 1, an output end of the secondary amplifying subunit 21 is connected to an input end of the integrating subunit 23, an output end of the integrating subunit 23 is connected to an input end of the anti-aliasing filtering subunit 24, and an output end of the anti-aliasing filtering subunit 24 is connected to the control unit 4.
As an alternative implementation of the present embodiment, the secondary amplification 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 a resistor R13 is connected to an output end of a VSO2, the other end of the resistor R13 is connected to one end of a capacitor C16 and a pin 2 of a control chip U5 respectively, the other end of the capacitor C16 is connected to a pin 1 of the control chip U5 and one end of a resistor R17 respectively, the other end of the resistor R17 is connected to a pin 6 of a control chip U5, a pin 3 of the control chip U5 is connected to one end of a resistor R15, the other end of the resistor R15 is connected to one end of a capacitor C17, one end of a resistor R16 and a 2.5V output end respectively, the other end of the capacitor C17 is connected to a ground terminal AGND, the other end of the resistor R16 is connected to a pin 5 of the control chip U5, an 8 pin of the control chip U5 is connected to one end of a capacitor C18, one end of a capacitor C19 and a 5V output end respectively, and the other end of a capacitor C18 and the other end of a capacitor C19 are connected to the ground terminal 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; pin 11 of the control chip U6 is connected to one end of a capacitor C21, one end of a capacitor C22 and a 5V output end respectively, the other end of the capacitor C21 and the other end of the capacitor C22 are both connected to a ground terminal AGND, pin 13 of the control chip U6 is connected to an SCLK port, pin 14 of the control chip U6 is connected to an SDI port, pin 15 of the control chip U6 is connected to an SDO port, the SCLK port, the SDI port and the SCLK port are all connected to the control unit, pin 12 of the control chip is connected to one end of a capacitor C23, one end of a capacitor C24 and an output terminal VDD respectively, the other end of the capacitor C23 and the other end of the capacitor C24 are both connected to the ground terminal DGND, pin 15 of the control chip U6 is also connected to one end of a resistor R19, the other end of the resistor R19 is connected to the VDD output terminal, pin 1 and pin 3 of the control chip U6 are both connected to the ground terminal DGND, pin 2 of the control chip U6 is connected to the output terminal, the 7 pin of the control chip U6 is connected to a ground terminal AGND, the 5 pin of the control chip U6 is connected to one end of a resistor R14, the other end of the resistor R14 is connected to the 2 pin of the control chip U5, the 6 pin of the control chip U6 is connected to the 1 pin of the control chip U5, the 9 pin of the control chip U6 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the 6 pin of the control chip U5 and one end of a capacitor C20, the other end of the capacitor C20 is connected to the 7 pin of the control chip U5, and the 10 pin of the control chip U6 is connected to the 7 pin of the U5 of the control chip.
Specifically, the electronic potentiometer 22 and the secondary amplification subunit 21 are used in a matched manner, so that 256-level amplification changes of the first sonic electrical signal can be realized, the signal amplification processing of the first sonic electrical signal can be met, and the processing of the first sonic electrical signal is easier and more convenient.
The integrating subunit 23 comprises 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, 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 integrally compensated by the capacitor C25 and the resistor R20, so that the first sonic electrical signal entering the anti-aliasing filtering subunit 24 is more stable.
The anti-aliasing filtering subunit 24 includes 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 a resistor R21 is connected to the integrator unit, the other end of a resistor R21 is connected to one end of a resistor R22, the other end of the resistor R22 is connected to a pin 3 of a control chip U7 and one end of a capacitor C28, the other end of a capacitor C28 is connected to a ground terminal AGND, a pin 2 of the control chip U7 is connected to the ground terminal AGND, a pin 5 of the control chip U7 is connected to one end of a capacitor C29, one end of the capacitor C20 and a 5V output terminal, the other end of the capacitor C29 and the other end of the capacitor C30 are both connected to the ground terminal AGND, a pin 1 of the control chip U7 is connected to a pin 4 of the control chip U7, one end of the capacitor C27 and one end of the capacitor C26, the other end of the capacitor C26 and the other end of the capacitor C27 are both connected to a connection point of the resistor R21 and the resistor R22, and a pin 4 of the control chip U7 is connected to an output terminal VSO 3.
Specifically, the first sonic electric signal after integral compensation is subjected to anti-aliasing filtering processing by the anti-aliasing filtering subunit 24, so that the background noise of the first sonic electric signal can be suppressed, and the gas leakage of the ultrahigh pressure gas pipeline can be monitored more accurately.
In the embodiment, the selectable model of the control chip U5 is AD8606, the selectable model of the control chip U6 is AD5142-10K, and the selectable model of the control chip U7 is AD 8605.
Referring to fig. 1 and fig. 8, as an optional implementation manner of this embodiment, the apparatus further includes a splitting unit 5, an input end of the splitting unit 5 is connected to the filtering and amplifying unit 2, and output ends of the splitting unit 5 are respectively connected to the control unit 4 and the control center 6; the splitting unit 5 is configured to split the sound wave signal output by the filtering and amplifying unit 2, and transmit the sound 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 a resistor R24 is connected to the output end of the VSO3, the other end of a 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 a resistor R25, the other end of a resistor R25 is connected to the ground terminal AGND, the 4 pin of the control chip U8 is connected to the ground terminal AGND, the 5 pin of the control chip is connected to one end of the resistor R26 and the other end of the resistor R27 respectively, the other end of the resistor R27 is connected to the ground terminal AGND, the other end of the resistor R26 is connected to the output end of the VSO3, the 8 pin of the control chip U8 is connected to one end of a capacitor C32, one end of a capacitor C33 and an AVDD output terminal, the other end of the capacitor C32 and the other end of the capacitor C33 are both connected to the ground terminal AGND, the 1 pin and the 2 pin of the control chip U8 are both connected to one end of a resistor R23, the other end of the resistor R23 is connected to the output terminal of the ADCIN output terminal and one end of the capacitor C31, the other end of the capacitor C31 is connected to a ground terminal AGND, and pins 6 and 7 of the control chip U8 are both connected to the SIG port, which is connected to an external control center.
Specifically, the splitting unit 5 can transmit the first sonic electrical signal 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 electrical signal, so that the first sonic electrical signal input by the second-stage amplifying subunit 21 is more accurate, and further, the ultrahigh pressure gas pipe pass acoustic wave monitoring device can monitor the gas leakage of the ultrahigh pressure gas pipe more accurately.
In the present embodiment, the selectable model of the control chip U8 is AD 8606.
Referring to fig. 9, as an alternative embodiment 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 X1; a VSA pin of the control chip U13 is connected to a ground terminal AGND, a pin 1 of the control chip U13 is respectively connected to one end of a capacitor C54, one end of a capacitor C55 and a VDD output terminal, the other end of the capacitor C54 and the other end of a capacitor C55 are both connected to DGND, a pin 3 of the control chip U13 is respectively connected to a pin 3 of a crystal oscillator X1 and one end of a capacitor C53, the other end of a capacitor C53 is respectively connected to the ground terminal DGND and a pin 2 of the crystal oscillator X1, a pin 1 of the crystal oscillator X1 is respectively connected to a pin 2 of the control chip U13 and one end of a capacitor C52, and the other end of the capacitor C52 is respectively connected to the ground terminal DGND and a pin 4 of the crystal oscillator X1; pins 4 of the control chip U13 are connected to one end of a resistor R41 and one end of a capacitor C56, respectively, the other end of the resistor R41 is connected to a VDD output terminal, the other end of the capacitor C56 is connected to a ground terminal DGND, pins 5 of the control chip U13 are connected to one end of a capacitor C57 and one end of a capacitor C58, the other end of the capacitor C57 and the other end of the capacitor C58 are connected to a ground terminal AGND, pin 8 of the control chip U13 is connected to an ADCIN output terminal, pin 9 of the control chip U13 is connected to a SYNC port, pin 11 of the control chip U13 is connected to an SCLK port, pin 12 of the control chip U13 is connected to an SDO port, pin 13 of the control chip U13 is connected to an SDI port, pin 15 of the control chip U13 is connected to an FCWB port, pin 16 of the control chip U13 is connected to a POWB port, pin 17 of the control chip U13 is connected to one end of a capacitor C59, one end of a capacitor C60 and the output terminal, the other end of the capacitor C59 and the other end of the capacitor C60 are both connected to a ground terminal DGND, a VSS pin of the control chip U13 is connected to the ground terminal DGND, a pin 19 of the control chip U13 is connected to one end of a resistor R42, the other end of the resistor R42 is connected to a VDD output terminal and one end of a resistor R43, the other end of the resistor R43 is connected to a pin 20 of the control chip U13, a pin 19 of the control chip U13 is further connected to a TX0 port, a pin 20 of the control chip U13 is further connected to an RX0 port, the control chip U13 communicates with the outside 485 through a TXO port and an RX0 port, a pin 22 of the control chip U13 is connected to a POWC port, and a pin 25 of the control chip U13 is connected to a POWA port.
Specifically, the crystal oscillator X1 provides a reference clock signal for the control chip U13, the control chip U13 transmits a control signal to the electronic potentiometer according to the reference clock signal and the received first sonic signal, so that the secondary amplification subunit 21 amplifies the first sonic signal according to the adjusted electronic potentiometer 22, and meanwhile, the control chip U13 controls the conduction of the triode Q1 according to the received first sonic signal, so that the first filtering subunit 13 modifies the filtering signal of the control chip U3 according to the requirement of the control chip U13, and thus the control chip U13 receives the required first sonic signal.
In the embodiment, the selectable model of the control chip U13 is STM32F051K8U 6.
The embodiment of the application also discloses an ultrahigh pressure gas pipeline monitoring system. Referring to fig. 10, the ultrahigh pressure gas pipeline monitoring system comprises 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 infrasound sensor 7, the pipe wall type infrasound sensor 7 transmits a detected second sound wave electric signal to the control center 6, the ultrahigh pressure gas pipeline monitoring system further comprises a medium type sound wave monitoring subsystem, the medium type sound wave monitoring subsystem comprises a plurality of ultrahigh pressure gas pipe pass sound wave monitoring devices arranged inside the ultrahigh pressure gas pipeline, and the ultrahigh pressure gas pipe pass sound wave monitoring devices transmit a detected first sound wave electric signal to the control center 6.
In this embodiment, the dielectric acoustic wave monitoring subsystem further includes a first transmission component 8, the ultrahigh pressure gas pipe pass acoustic wave monitoring device is in wireless communication connection with the first transmission component 8, and the first transmission component 8 is in wireless communication connection with the control center 6; the pipe wall type sound wave monitoring subsystem further comprises a second transmission assembly 9, the pipe wall type infrasound 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 optional implementation manner of this embodiment, the first transmission assembly 8 and the second transmission assembly 9 are both internet assemblies.
In the embodiment, the alarm assembly 10 is further included, and the alarm assembly 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 component 10.
The implementation principle of the ultrahigh pressure gas pipeline monitoring system in the embodiment of the application is as follows: when the pipe wall type infrasonic sensor 7 monitors a second sonic wave electric signal, the second sonic wave electric signal is transmitted into the control center 6, meanwhile, the first sonic wave electric signal monitored by the infrasonic wave monitoring device of the ultrahigh pressure gas pipeline is transmitted into the control center 6, the control center 6 compares the first preset sonic wave electric signal with the first sonic wave electric signal, meanwhile, the control center 6 compares the second preset sonic wave electric signal with the second sonic wave electric signal, when the first preset sonic wave electric signal is inconsistent with the first sonic wave electric signal and the second preset sonic wave electric signal is inconsistent with the first sonic wave electric signal, the control center 6 determines that the ultrahigh pressure gas pipeline leaks, determines a leakage point of the ultrahigh pressure gas pipeline according to the position of the ultrahigh pressure gas pipe pass sonic wave monitoring device, and simultaneously, the control center 6 verifies the leakage point according to the position of the wall type pipe infrasonic sensor 7, when the pipe wall type monitoring subsystem and the medium type sound wave monitoring subsystem locate the leakage point consistently, the control center 6 determines that the leakage point at the moment is a real leakage point, and the control center 6 controls the output of the alarm component 10, so that a worker can quickly drive to the leakage point to maintain the leakage point.
The embodiment of the application also discloses a method for monitoring the ultrahigh pressure gas pipeline, and the main flow of the method is described as follows (steps S101 to S105) with reference to fig. 11:
step S101, a first sound wave electric signal and a second sound wave electric signal are obtained.
Specifically, the first sonic wave electric signal is monitored by a super-pressure gas tube pass acoustic wave monitoring device; the second sonic electrical signal is monitored by a pipe wall type infrasound sensor 7 arranged on the outer wall of the ultrahigh pressure gas pipeline.
Because the ultrahigh-pressure gas pipe pass acoustic monitoring device is placed in the ultrahigh-pressure gas pipeline, a first sonic wave electric signal monitored by the ultrahigh-pressure gas pipe pass acoustic monitoring device is generated by the ultrahigh-pressure gas in the transportation process of the ultrahigh-pressure gas in the ultrahigh-pressure gas pipeline; because pipe wall formula infrasound sensor 7 and superhigh pressure gas pipeline outer wall fixed connection, so the second sound wave signal of telecommunication is that superhigh pressure gas collides with superhigh pressure gas pipeline inner wall, makes superhigh pressure gas pipeline vibration to produce the second sound wave signal, pipe wall formula infrasound sensor 7 monitors the second sound wave signal that superhigh pressure gas pipeline produced, and converts the second sound wave signal into the second sound wave signal of telecommunication.
And S102, carrying out abnormity analysis on the ultrahigh 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 sonic electric signal to obtain the first analysis result includes:
extracting a first sound wave characteristic of the first sound wave electric signal;
comparing the first preset sound wave characteristic with the first sound wave characteristic;
if the first preset sound wave characteristic is inconsistent with the first sound wave characteristic, the first analysis result is abnormal;
specifically, the first sound wave characteristic comprises a peak value and a frequency, when the ultrahigh pressure gas pipeline leaks, the first sound wave characteristic is compared with a first preset sound wave characteristic, the peak value of a first sound wave signal is increased, the frequency of the first sound wave signal is increased, and it is determined that the first sound wave signal is abnormal, namely the ultrahigh pressure gas pipeline is abnormal.
Step S103, carrying out abnormal analysis on the ultrahigh 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 electrical signal to obtain a second analysis result includes:
extracting a second sound wave feature of the second sound wave electric signal;
comparing the second preset sound wave characteristic with the second sound wave characteristic;
and if the second preset sound wave characteristic is not consistent with the second sound wave characteristic, the second analysis result is abnormal.
Specifically, the second sonic wave characteristic comprises a peak value and a frequency, when the ultrahigh pressure gas pipeline leaks, the second sonic wave characteristic is compared with the second preset sonic wave characteristic, the peak value and the frequency of the second sonic wave signal become large, and it is determined that the second sonic wave signal is abnormal at the moment, namely the ultrahigh pressure gas pipeline is abnormal.
And step S104, if the first analysis result and the second analysis result are both 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 sonic electrical signal monitored by the medium-type sonic monitoring subsystem is abnormal, but the second sonic electrical signal monitored by the pipe-wall type infrasound sensor 7 is not abnormal, at this time, the first sonic electrical signal may be abnormal due to impurities flowing into the ultra-high pressure gas pipeline, and the impurities do not affect the second sonic signal generated by the ultra-high pressure gas pipeline, so that it cannot be determined that the ultra-high pressure gas pipeline leaks.
When the first analysis result is normal and the second analysis result is abnormal, the first sound wave electric signal monitored by the medium sound wave monitoring subsystem is not changed, and because the pipe wall type infrasound sensor 7 is fixed outside the ultrahigh pressure gas pipeline, and the ultrahigh pressure gas pipeline is installed underground, when a running vehicle passes by on the ground, the pipe wall type infrasound sensor 7 detects that the vehicle passes by above the ultrahigh pressure gas pipeline to cause ground vibration, the second sound wave electric signal is abnormal, but at the moment, the ultrahigh pressure gas pipeline is not leaked, and the pipe wall type monitoring subsystem and the medium type subsystem are falsely reported.
When the first analysis result and the second analysis result are both abnormal, namely the medium type sound wave monitoring subsystem and the pipe wall type sound wave monitoring subsystem both monitor abnormal conditions at the moment, so that the first sound wave electric signal and the second sound wave electric signal are both changed, and the leakage of the ultrahigh pressure gas pipeline can be determined at the moment.
And S105, positioning a leakage point on the ultrahigh pressure gas pipeline based on the first sonic electric signal and/or the second sonic electric signal.
As an optional implementation manner of this embodiment, the locating the leakage point on the ultrahigh pressure gas pipeline based on the first sonic electric 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 ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to a first moment and a second position of the ultrahigh-pressure gas pipe pass acoustic 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 be leaked, the control center acquires all moments of the first sonic electric signal, generates a time table, and determines a first moment and a second moment of acquiring the first sonic electric signal according to the time table, wherein the first moment and the second moment are the earliest two moments in the time table.
In this embodiment, a first position of the ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to a first moment and a second position of the ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to a second moment are obtained; and the first position and the second position of the ultrahigh pressure gas tube pass acoustic wave monitoring device are pre-stored by the system, and/or the first position and the second position of the ultrahigh pressure gas tube pass acoustic wave monitoring device are pre-stored by the GPS.
After acquiring the first position and the second position, a leak point may be determined between the two ultra-high pressure gas tube pass acoustic monitoring devices.
As an optional implementation manner of this embodiment, the locating the leakage point on the ultrahigh pressure gas pipeline based on the second sonic electric signal includes:
acquiring second sonic electrical signals detected by at least two pipe wall type infrasound sensors 7;
acquiring the phases of the abnormal wave bands of the at least two second sound wave electric signals in the second sound wave signals;
the position of the leak is calculated based on the phase of the abnormal band in the second sonic electric signal.
Specifically, taking two second sonic electrical signals as an example, the formula of the second sonic electrical signals is as follows:
wherein f is s ＝50HZ，A＝3300mv，n＝1,2,3…N，N＝50，f＝1HZ，
First order difference is made to the X1 signal:
d 11(k) ＝X1(K)-X1(K+1)
wherein K is 1,2,3 … N-2;
d 12(k) ＝X1(K+1)-X1(K+2)
wherein, K is 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 is 1,2,3 … N-2, j is 1,2,3 … M-1;
X12(j，k)＝X1(k+1)+j*d 12(k)
wherein k is 1,2,3 … N-2, j is 1,2,3 … M-1;
and (3) 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 positions of the leakage points according to the phase difference.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the present application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. The ultra-high pressure gas pipe pass acoustic wave monitoring device is characterized by comprising a signal acquisition unit (1), a filtering amplification unit (2), a power supply unit (3) and a control unit (4), wherein the input end of the power supply unit (3) is connected to an external power supply, the output end of the power supply unit (3) is respectively connected to the signal acquisition unit (1), the filtering amplification unit (2) and the control unit (4), and the signal acquisition unit (1), the filtering amplification 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 generated by ultrahigh pressure gas in ultrahigh pressure gas pipeline transportation and 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 amplification on the first sonic electric signal;
the power supply unit (3) is used for providing power for the signal acquisition unit (1), the filtering amplification 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).
2. The ultra-high pressure gas tube pass acoustic wave monitoring device according to claim 1, wherein 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), wherein 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 filtering and amplifying 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 filtering and amplifying 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 (34) A manufacturing unit (4).
3. The ultra-high pressure gas tube pass acoustic wave monitoring device according to claim 1 or 2, wherein 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. The ultra-high pressure gas pipe pass acoustic wave monitoring device according to claim 1, further comprising a splitting unit (5), wherein an input end of the splitting unit (5) is connected to the filtering and amplifying unit (2), and an output end of the splitting unit (5) is respectively connected to 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).
5. An ultrahigh pressure gas pipeline monitoring system comprises 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 infrasound sensor (7), the pipe wall type infrasound sensor (7) transmits a detected second sound wave electric signal to the control center (6), the ultrahigh pressure gas pipeline monitoring system is characterized by further comprising a medium type sound wave monitoring subsystem, the medium type sound wave monitoring subsystem comprises a plurality of ultrahigh pressure gas pipe pass sound wave monitoring devices which are arranged in an ultrahigh pressure gas pipeline and are according to any one of claims 1 to 4, and the ultrahigh pressure gas pipeline infrasound wave monitoring devices transmit a detected first sound wave electric signal to the control center (6).
6. A method for monitoring an extra-high pressure gas pipeline, for use in a control centre (6), the method comprising:
acquiring a first sonic electric signal and a second sonic electric signal, wherein the first sonic electric signal is monitored by the ultrahigh-pressure gas pipe pass acoustic monitoring device as claimed in any one of claims 1 to 4, and the second sonic electric signal is monitored by a pipe wall type infrasound sensor (7) arranged on the outer wall of the ultrahigh-pressure gas pipe;
carrying out anomaly analysis on the ultrahigh pressure gas pipeline according to the first sonic electric signal to obtain a first analysis result;
performing anomaly analysis on the ultrahigh 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 both abnormal, determining that the ultrahigh pressure gas pipeline leaks.
7. The method according to claim 6, wherein the step of performing data analysis on the first sonic electrical signal to obtain a first analysis result comprises:
extracting a first sound wave feature of the first sound wave electric signal;
comparing a first preset sound wave characteristic with the first sound wave characteristic;
if the first preset sound wave characteristic is inconsistent with the first sound wave characteristic, the first analysis result is abnormal; and/or the presence of a gas in the gas,
the data analysis of the second sonic electric signal to obtain a second analysis result comprises:
extracting a second sound wave feature of the second sound wave electric signal;
comparing a second preset sonic feature with the second sonic feature;
and if the second preset sound wave characteristic is not consistent with the second sound wave characteristic, the second analysis result is abnormal.
8. The method of monitoring an ultrahigh-pressure gas pipeline according to claim 6, further comprising, after said determining that the ultrahigh-pressure gas pipeline is leaking:
and positioning the leakage point on the ultrahigh pressure gas pipeline based on the first sonic electric signal and/or the second sonic electric signal.
9. The method of claim 8, wherein locating a leak in the ultra-high pressure gas line 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 ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to the first moment and a second position of the ultrahigh-pressure gas pipe pass acoustic wave monitoring device corresponding to the second moment;
a leak is located based on the first and second locations.
10. The method of claim 8, wherein locating a leak in the ultra-high pressure gas pipeline based on the second sonic electrical signal comprises:
acquiring second sonic electrical signals detected by at least two pipe wall type infrasonic sensors (7);
obtaining the phase of the abnormal wave bands of the at least two second sound wave electric signals in the second sound wave electric signals;
the position of the leak is calculated based on the phase of the abnormal band in the second sonic electric signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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