CN107524922A - A kind of pipe leakage infrasonic wave detection apparatus, system and method - Google Patents
A kind of pipe leakage infrasonic wave detection apparatus, system and method Download PDFInfo
- Publication number
- CN107524922A CN107524922A CN201710935126.1A CN201710935126A CN107524922A CN 107524922 A CN107524922 A CN 107524922A CN 201710935126 A CN201710935126 A CN 201710935126A CN 107524922 A CN107524922 A CN 107524922A
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- Prior art keywords
- light arm
- pipe leakage
- infrasound
- mode fiber
- shaped structure
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Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
- G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of pipe leakage infrasonic wave detection apparatus, detection means includes barrel shaped structure body, sense light arm, reference light arm, sensing Transmission Fibers and sensing single-mode fiber, sense light arm connects the sensing Transmission Fibers, reference light arm connects the sensing single-mode fiber, sense light arm is arranged at the top of barrel shaped structure, reference light arm is arranged at the inside of barrel shaped structure, sensing Transmission Fibers and sensing single-mode fiber and drawn from the optical fiber fairlead for being arranged at barrel shaped structure bottom；When the infrasound signal as caused by being vibrated pipe leakage is transmitted to sense light arm, sense light arm can produce deformation, and then make the optical signal in sense light arm that photoelastic effect occur.The present invention carries out echo detecting by optical fiber using Mach-Zahnder interference principle to infrasound signal caused by pipe leakage, has strong interference immunity, long transmission distance, the advantage of fast response time.The present invention also provides a kind of pipe leakage infrasound detecting system and method.
Description
Technical field
The present invention relates to technical field of nondestructive testing, especially a kind of pipe leakage infrasonic wave detection apparatus, system and side
Method.
Background technology
Pipeline is the main tool for transporting natural gas.Due to pipeline aging, dielectric corrosion, construction wrong and artificial destruction
Etc. reason, in recent years all over the world there occurs many gas pipeline leakage infrasound explosion accidents, huge life is caused
Property loss, and bring serious environmental pollution.
When pipeline breaking produces leakage, pipeline internal medium all pours into rapidly leak in the presence of pipeline pressure,
It is spouting from leakage point, the medium ejected and damaged tube wall high-speed friction, formed and vibrated in leak.The vibration can produce
Raw infrasound signal, its low frequency signal can be along pipeline long-distance communications, as long as can so be detected in pipe ends installation
To the sensor for leaking infrasound signal and sensor signal is analyzed, it is possible to detect times between two sensors
The leakage of one position generation simultaneously positions to it.
The leakage monitoring sensor for being currently based on pressure wave is sound wave collection sensor, belongs to electric transducer, collection be present
The problems such as precision is low, poor sensitivity, slow response speed, and be difficult not adapt to the severe ring in pipeline in explosion-proof applications
Impact, the impurity in medium and corrosion of high static pressure, air-flow in border, including pipeline etc., industrial pipeline can not be met to anti-
Quick-fried, sealing requirement.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of pipe leakage infrasonic wave detection apparatus to utilize Mach Zeng De
Interferometer principle, sensing is carried out by optical fiber, transmission is finally translated into infrasound signal and is implemented without GPS time services and nothing
Line electricity number pass can to infrasound signal carry out echo acquirement, have strong interference immunity, fast response time, long transmission distance it is excellent
Point.
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides a kind of pipe leakage infrasonic wave detection apparatus, including
Barrel shaped structure body, sense light arm, reference light arm, sensing Transmission Fibers and sensing single-mode fiber, described in sense light arm connection
Sensing Transmission Fibers and the sensing single-mode fiber, the sense light arm are arranged at the top of the barrel shaped structure, the reference
Light arm is arranged at the inside of the barrel shaped structure, and the biography sense light arm and reference light arm are described from being arranged at by single-mode fiber
The optical fiber fairlead of barrel shaped structure bottom is drawn；
When the infrasound signal as caused by being vibrated pipe leakage is transmitted to the sense light arm, the sense light arm can produce
Deformation, and then make the optical signal in the sense light arm that photoelastic effect occur, modulate the optical signal.
As the improvement of such scheme, the barrel shaped structure body includes first flange structure and second flange structure, described
First flange structure is in the top of the barrel shaped structure, and the second flange structure is in the interposition of the barrel shaped structure
Put.
As the improvement of such scheme, the sense light arm the first flange structure and the second flange structure it
Between and be arranged on the upper of the first flange structure, the reference light arm is in the second flange structure and the barrel shaped structure bottom
Between end and it is arranged on the medial surface of the second flange structure, the sense light arm and the reference light arm pass through institute respectively
State sensing Transmission Fibers and sensing single-mode fiber is converged at the optical fiber extraction of the barrel shaped structure bottom.
As the improvement of such scheme, the sense light arm, reference light arm, sensing Transmission Fibers and sensing single-mode fiber are
Single-mode fiber.
As the improvement of such scheme, the sense light arm and reference light arm are solid respectively in the form of spiral of Archimedes
Due in the first flange structure and second flange structure, the second flange structure is provided with optical fiber fairlead.
The present invention also provides a kind of pipe leakage infrasound detecting system, including light source emitter, the first single-mode fiber, the
One 3DB couplers, the 2nd 3DB couplers, the second single-mode fiber, detector and above-mentioned pipe leakage infrasound detection dress
Put, the light source emitter connects the first 3DB couplers, the pipe leakage infrasound by first single-mode fiber
Detection means connects the first 3DB couplers and the 2nd 3DB couplers respectively, and the 2nd 3DB couplers connect the spy
Device is surveyed, the optical signal after the modulation interferes effect at the first 3DB couplers and the 2nd 3DB couplers, interferes
Optical signal transmission afterwards to the detector is converted into infrasound signal.
As the improvement of such scheme, pipe leakage infrasound detecting system also includes protection outer layer, the protection outer layer
First single-mode fiber and the second single-mode fiber outer layer are wrapped in for armoring material.
The embodiment of the present invention also provides a kind of detection method based on above-mentioned pipe leakage infrasound detecting system, including
Following steps：
S1, by the pipe leakage infrasonic wave detection apparatus be located at pipeline side；
S2, the light source emitter are launched continuous optical signal and transmitted by single-mode fiber to the pipe leakage infrasound
Detection means；
Infrasound signal enters to the optical signal transmitted to the pipeline leakage testing device caused by S3, the pipe vibration
Row modulation, the optical signal after the modulation interfere effect at the first 3DB couplers and the 2nd 3DB couplers, do
Optical signal transmission to the detector after relating to is converted into infrasound signal.
As the improvement of such scheme, when the infrasound signal passes through the pipe leakage infrasonic wave detection apparatus and institute
The optical signal generation i.e. described optical signal of photoelastic effect is stated to be modulated.
Pipe leakage infrasonic wave detection apparatus provided in an embodiment of the present invention, system and method, have the advantages that：
Light source emitter described in pipe leakage infrasonic wave detection apparatus provided in an embodiment of the present invention launches continuous light
Signal is transmitted to the pipe leakage infrasonic wave detection apparatus, and then infrasound signal caused by pipe vibration is to transmitting to described
The optical signal of pipeline leakage testing device is modulated, and the optical signal after the modulation is in the first 3DB couplings and the 2nd 3DB
Effect is interfered at coupler, the optical signal transmission after interference to the detector is converted into infrasound signal.Utilize Mach
Zehnder interferometer principle, sensing is carried out by optical fiber, transmission is finally translated into infrasound signal and is implemented without GPS time services
Echo acquirement can be carried out to infrasound signal by being passed with radio number, have strong interference immunity, fast response time, long transmission distance
The advantages of.
Brief description of the drawings
Fig. 1 is the structural representation of pipe leakage infrasonic wave detection apparatus provided by the invention；
Fig. 2 is second flange structure and to be arranged in second flange in pipe leakage infrasonic wave detection apparatus provided by the invention
The structural representation of reference light arm in structure；
Fig. 3 is the structural representation of pipe leakage infrasound detecting system provided by the invention；
Fig. 4 is the structure chart of pipe leakage infrasound detecting system provided by the invention；
Fig. 5 is the schematic flow sheet of pipe leakage infrasonic sound wave detecting method provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, a kind of pipe leakage infrasonic wave detection apparatus of offer of the embodiment of the present invention, including barrel shaped structure body 14,
Sense light arm 9, reference light arm 8, sensing Transmission Fibers 6 and sensing single-mode fiber 10, the sense light arm 9 connect the sensing and passed
Fibre 6 and the sensing single-mode fiber 10 are lost, the sense light arm 9 is arranged at the top of the barrel shaped structure body 14, the ginseng
The inside that light arm 8 is arranged at the barrel shaped structure body 14 is examined, the sense light arm 9 and reference light arm 8 pass through single-mode fiber 2 respectively
Drawn with 7 from the optical fiber fairlead for being arranged at the bottom of barrel shaped structure body 14 and use lock screw to fix；
When the infrasound signal as caused by being vibrated pipe leakage is transmitted to the sense light arm 9, the sense light arm 9 can produce
Raw deformation, and then make the optical signal in the sense light arm 9 that photoelastic effect occur, modulate the optical signal.
The barrel shaped structure body 14 includes first flange structure 12 and second flange structure 13, the first flange structure 12
In the top of the barrel shaped structure body 14, the second flange structure 13 is in the centre position of the barrel shaped structure body 14.
The sense light arm 9 is between the first flange structure 12 and the second flange structure 13 and is arranged on institute
The upper of first flange structure 12 is stated, the reference light arm 8 is located at the second flange structure 13 and the bottom of barrel shaped structure body 14
Between end and it is arranged on the medial surface of the second flange structure 13, the sense light arm 9 and the reference light arm 8 lead to respectively
The single-mode fiber 2 and 7 is crossed to converge at the optical fiber extraction of the bottom of barrel shaped structure body 14.
The sense light arm 9, reference light arm 8, sensing Transmission Fibers 6 and sensing single-mode fiber 10 are single-mode fiber.
Referring to Fig. 2, the sense light arm 9 and reference light arm 8 are individually fixed in described in the form of spiral of Archimedes
In first flange structure 12 and second flange structure 13, the second flange structure 13 is provided with optical fiber fairlead 15 and 16.
The embodiment of the present invention utilizes the leakage situation of Mach once moral principle detection pipe under test, when pipeline breaking is produced and let out
During leakage, pipeline internal medium all pours into rapidly leak in the presence of pipeline pressure, spouting from leakage point, ejects
Medium and damaged tube wall high-speed friction, form in leak and vibrate.Infrasound caused by the vibration passes from leak along pipeline
Broadcast.When the transmit scriptures sense light arm 9 of infrasound can produce deformation, and then it is photoelastic that the optical signal in the sense light arm 9 occurs
Effect is that the interference light of different density degree can be produced according to pipe stress distribution situation, it is possible to understand that, the infrasound
Modulating action is generated to the optical signal of the internal transmission of sense light arm 9.Optical signal after ovennodulation passes through Treatment Analysis
The detection to pipe under test leakage can be achieved.The embodiment of the present invention provides a kind of pipe leakage infrasonic wave detection apparatus, utilizes horse
Conspicuous Zehnder interferometer principle, sensing is carried out by optical fiber, transmission is finally translated into infrasound signal and is implemented without GPS and awards
When and radio number pass can to infrasound signal carry out echo acquirement, have strong interference immunity, fast response time, transmission range
The advantages of remote.
Referring to Fig. 3 and Fig. 4, the present invention also provides a kind of pipe leakage infrasound detecting system, including the pipe leakage
Infrasonic wave detection apparatus 17 and light source emitter 1, the first single-mode fiber 2, the first 3DB couplers 5, the 2nd 3DB couplers 11,
Second single-mode fiber 7 and detector 3, the light source emitter 1 connect the first 3DB couplings by first single-mode fiber 2
Clutch 5, the pipe leakage infrasonic wave detection apparatus 17 connect the first 3DB couplers 5 and the 2nd 3DB couplers respectively
11, the 2nd 3DB couplers 11 connect the detector 3 by second single-mode fiber 7, and the optical signal after modulation is in institute
State and effect is interfered at the first 3DB couplers 5 and the 2nd 3DB couplers 11, the optical signal transmission after interference to the detection
Device 3 is converted into infrasound signal.
The pipe leakage infrasound detecting system also includes protection outer layer 4, and the protection outer layer wraps up for armoring material
In the outer layer of 2 and second single-mode fiber of the first single-mode fiber 7.
In the present embodiment, the light source emitter 1 is launched continuous optical signal and transmitted by single-mode fiber to the pipe
Road leaks infrasonic wave detection apparatus 17, and infrasound signal caused by pipe vibration is to transmitting to the pipeline leakage testing device 17
Optical signal be modulated, the optical signal after modulation occurs dry at the first 3DB couplers 5 and the 2nd 3DB couplers 11
Effect is related to, the optical signal transmission after interference to the detector 3 is converted into infrasound signal.The embodiment of the present invention provides a kind of pipe
Road leaks infrasound detecting system, and using Mach-Zehnder interferometer principle, sensing, the last conversion of transmission are carried out by optical fiber
GPS time services are implemented without for infrasound signal and radio number passes and can carry out echo acquirement to infrasound signal, are had anti-
The advantages of interference is strong, fast response time, long transmission distance.
Referring to Fig. 5, the embodiment of the present invention also provides a kind of detection based on above-mentioned pipe leakage infrasound detecting system
Method, comprise the following steps：
S1, by the pipe leakage infrasonic wave detection apparatus 17 be located at pipeline side；
S2, the light source emitter 1 are launched continuous optical signal and transmitted by single-mode fiber to the pipe leakage infrasonic sound
Ripple detection means 17；
Infrasound signal caused by S3, pipe vibration is to transmitting to the optical signal progress of the pipeline leakage testing device 17
Modulation, the optical signal after the modulation interfere effect at the first 3DB couplers 5 and the 2nd 3DB couplers 11, do
Optical signal transmission to the detector 3 after relating to is converted into infrasound signal.
The infrasound signal passes through photoelastic with the optical signal generation during pipe leakage infrasonic wave detection apparatus 17
Effect is that the optical signal is modulated.
A kind of pipe leakage infrasonic sound wave detecting method provided in an embodiment of the present invention is by the way that the light source emitter 1 is launched
Continuous optical signal transmission is to the pipe leakage infrasonic wave detection apparatus 17, then infrasound signal pair caused by pipe vibration
Transmit to the optical signal of the pipeline leakage testing device and be modulated, the optical signal after the modulation is in the first 3DB couplings
Effect is interfered at the 3DB couplers 11 of conjunction 5 and the 2nd, the optical signal transmission after interference to the detector is converted into infrasound
Signal.The embodiment of the present invention provides a kind of pipe leakage infrasonic sound wave detecting method, using Mach-Zehnder interferometer principle, passes through light
Fibre carries out sensing, transmission be finally translated into infrasound signal be implemented without that GPS time services and radio number pass can be to secondary
Acoustic signals carry out echo acquirement, have the advantages of strong interference immunity, fast response time, long transmission distance.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement and deformation can also be made, these are improved and deformation is also considered as
Protection scope of the present invention.
Claims (9)
- A kind of 1. pipe leakage infrasonic wave detection apparatus, it is characterised in that including barrel shaped structure body, sense light arm, reference light arm, Sense Transmission Fibers and sensing single-mode fiber, the sense light arm connection sensing Transmission Fibers and the sensing single-mode optics Fibre, the sense light arm are arranged at the top of the barrel shaped structure, and the reference light arm is arranged at the inside of the barrel shaped structure, Sense light arm and the reference light arm of passing is drawn by single-mode fiber from the optical fiber fairlead for being arranged at the barrel shaped structure bottom；When the infrasound signal as caused by being vibrated pipe leakage is transmitted to the sense light arm, the sense light arm can produce shape Become, and then make the optical signal in the sense light arm that photoelastic effect occur, modulated the optical signal.
- 2. pipe leakage infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that the barrel shaped structure body includes the One flange arrangement and second flange structure, the first flange structure are in the top of the barrel shaped structure, the second flange Structure is in the centre position of the barrel shaped structure.
- 3. pipe leakage infrasonic wave detection apparatus as claimed in claim 1, it is characterised in that the sense light arm is described Between one flange arrangement and the second flange structure and the upper of the first flange structure is arranged on, the reference light arm is in institute State between second flange structure and the barrel shaped structure bottom and be arranged on the medial surface of the second flange structure, the biography Photosensitive arm and the reference light arm are converged at the optical fiber extraction of the barrel shaped structure bottom by single-mode fiber respectively.
- 4. pipe leakage infrasonic wave detection apparatus as claimed in claim 3, it is characterised in that the sense light arm, reference light Arm, sensing Transmission Fibers and sensing single-mode fiber are single-mode fiber.
- 5. pipe leakage infrasonic wave detection apparatus as claimed in claim 4, it is characterised in that the sense light arm and reference light Arm is individually fixed in the form of spiral of Archimedes in the first flange structure and second flange structure, second method Blue structure is provided with optical fiber fairlead.
- 6. a kind of pipe leakage infrasound detecting system, it is characterised in that including the pipe as described in any one of Claims 1 to 5 Road leak infrasonic wave detection apparatus and light source emitter, the first single-mode fiber, the first 3DB couplers, the 2nd 3DB couplers, Second single-mode fiber and detector, the light source emitter connect the first 3DB couplers by first single-mode fiber, The pipe leakage infrasonic wave detection apparatus connects the first 3DB couplers and the 2nd 3DB couplers respectively, and described second 3DB couplers connect the detector, and the optical signal after the modulation is in the first 3DB couplers and the 2nd 3DB couplers Place interferes effect, and the optical signal transmission after interference to the detector is converted into infrasound signal.
- 7. pipe leakage infrasound detecting system as claimed in claim 6, it is characterised in that pipe leakage infrasound detection system System also includes protection outer layer, and the protection outer layer is that armoring material is wrapped in outside first single-mode fiber and the second single-mode fiber Layer.
- 8. a kind of detection method of the pipe leakage infrasound detecting system based on as described in any one of claim 6~7, it is special Sign is, comprises the following steps：S1, by the pipe leakage infrasonic wave detection apparatus be located at pipeline side；S2, the light source emitter are launched continuous optical signal and transmitted by single-mode fiber to pipe leakage infrasound detection Device；Infrasound signal is adjusted to the optical signal transmitted to the pipeline leakage testing device caused by S3, the pipe vibration System, the optical signal after the modulation interferes effect at the first 3DB couplers and the 2nd 3DB couplers, after interference Optical signal transmission to the detector be converted into infrasound signal.
- 9. pipe leakage infrasonic sound wave detecting method as claimed in claim 8, it is characterised in that the infrasound signal passes through institute The i.e. described optical signal of photoelastic effect occurs with the optical signal when stating pipe leakage infrasonic wave detection apparatus to be modulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935126.1A CN107524922A (en) | 2017-09-30 | 2017-09-30 | A kind of pipe leakage infrasonic wave detection apparatus, system and method |
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| CN201710935126.1A CN107524922A (en) | 2017-09-30 | 2017-09-30 | A kind of pipe leakage infrasonic wave detection apparatus, system and method |
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| CN201710935126.1A Pending CN107524922A (en) | 2017-09-30 | 2017-09-30 | A kind of pipe leakage infrasonic wave detection apparatus, system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113176043A (en) * | 2021-04-16 | 2021-07-27 | 南京工程学院 | Gas leakage detection system and method |
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| CN113176043A (en) * | 2021-04-16 | 2021-07-27 | 南京工程学院 | Gas leakage detection system and method |
| CN113176043B (en) * | 2021-04-16 | 2022-07-01 | 南京工程学院 | Gas leakage detection system and method |
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