CN102182937A - Pipeline leakage vibration signal acquisition enhancing device - Google Patents
Pipeline leakage vibration signal acquisition enhancing device Download PDFInfo
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- CN102182937A CN102182937A CN2011100547024A CN201110054702A CN102182937A CN 102182937 A CN102182937 A CN 102182937A CN 2011100547024 A CN2011100547024 A CN 2011100547024A CN 201110054702 A CN201110054702 A CN 201110054702A CN 102182937 A CN102182937 A CN 102182937A
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Abstract
The invention discloses a pipeline leakage vibration signal acquisition enhancing device which comprises a rigid luffing mechanism and a sensor, wherein one end of the rigid luffing mechanism is a big end face which is connected with the outer wall of a pipeline or a valve handle of a pipeline; the other end of the rigid luffing mechanism is a small end face, particularly a flat surface, which is connected with the sensor; the sectional area of the rigid luffing mechanism, from the small end face to the big end face, changes from small to large. The invention provides a new device for acquiring pipeline leakage vibration signals, the device can gather vibration and then send the gathered vibration to the sensor, thus enhancing the input of the sensor and improving the output SNR (signal-to-noise ration); meanwhile, the detection performance of a pipeline leakage detection positioning device can be improved and the device is convenient to install and move.
Description
Technical field
The present invention relates to a kind of pipeline leak detection technology, relate in particular to a kind of pipe leakage vibration signals collecting intensifier.
Background technique
In all kinds of head conduits, as water supply, oil transportation and gas pipeline, owing to all kinds of artificial or natural reasons, pipe leakage happens occasionally, and has caused a large amount of water, the waste of oily gentle resource, therefore, need in time to find and these pipe leakage situations of accurate location, and take measures to remedy.
At present, adopt all kinds of Leak testtion positioning equipments of acoustic signal processing method in pipe leakage is found and located, to obtain extensive use, such as audition instrument, digital correlation instrument etc., it all is to adopt vibration (sound) sensor to obtain to leak pipe vibration (sound) signal that causes that this kind equipment is used, the signal of gathering is analyzed and handled, carry out Leak testtion and leakage point location according to the oscillating signal of gathering, analyze and extract multiple signal characteristic, wherein the phase place of signal and leak source location is contacted directly.
The oscillating signal that pipe leakage causes will be propagated to the distant place along pipeline and piping laying medium (as soil, sandstone etc.), therefore, place vibration transducer in exposure place of under ground piping (as the tube wall that exposes, pipeline enclosure interface, valve etc.) and obtain the pipe vibration signal, in the detection device of extensive use at present, for metallic conduit, usually a magnetic base and sensor are linked together, magnetic base can directly be adsorbed on metal pipe-wall or the valve, and pipe vibration propagates into vibration transducer by magnetic base.The effect of magnetic base is to guarantee that whole vibration obtaining device can well contact with the measured point, guarantees that the pipe vibration signal propagates in the sensor.And, rely on the gravity of sensor itself for nonmetal pipeline, closely contact with tube wall.Like this, when sensor acquisition pipe vibration signal, what only gather is and sensor or sensor holder contact segment Analysis of Pipe Vibrations, in Leak testtion and position fixing process, because leaking the vibration that causes propagates far away more in pipeline, it is big more to decay, in the time of may propagating into detected position, it is very faint that vibration may become, and sensor only collects the very vibration of finite region, the signal of sensor signal to noise ratio is extremely low like this, and feasible detection performance greatly reduces even can not detect.
Summary of the invention
In order to solve the problem that exists in the background technique, the inventor has proposed pipe leakage vibration signals collecting intensifier of the present invention through concentrating on studies, and promptly rigidity jib lubbing mechanism one end is a large end face, and large end face is connected with the valve handle of pipeline outer wall or pipeline; The rigidity jib lubbing mechanism the other end is a small end face, and small end face is the plane, and small end face is connected with sensor; No matter be the rigidity jib lubbing mechanism of which kind of profile, it is that stack strengthens that its profile must guarantee from the vibration (also can think to be delivered on the sensor) that large end face propagates into little surface of contact, so must make the cross sectional area of rigidity jib lubbing mechanism,, change to large end face from small end face by from small to large mode.
Because the valve handle difference in shape of pipeline outer wall and pipeline has also just caused rigidity jib lubbing mechanism of the present invention when two positions of valve handle of respective tube pipeline outer wall and pipeline, and two kinds of schemes are also arranged:
When 1) the rigidity jib lubbing mechanism was connected with pipeline outer wall, large end face was a cambered surface, and the longitudinal section of rigidity jib lubbing mechanism is a zhou duicheng tuxing, and symmetry axis is: intersect vertically with the circle core shaft of large end face cambered surface, and with the vertical straight line in plane, small end face place.At this moment, the cross sectional area size of rigidity jib lubbing mechanism, to large end face, the version by linearity, index or ladder gradually changes from small to large from small end face.
When 2) the rigidity jib lubbing mechanism was connected with the valve handle of pipeline, rigidity jib lubbing mechanism profile was a round platform, and the small end face of round platform is connected with sensor, and the large end face of round platform is connected with the large end face of valve handle.
When the rigidity jib lubbing mechanism is connected with the valve handle of pipeline outer wall, pipeline, the valve handle position of rigidity jib lubbing mechanism colligation at pipeline outer wall or pipeline also can be used bolton with metal bar with the rigidity jib lubbing mechanism behind pipeline outer wall; Adopt aforesaid Placement need add the bondage instrument, be unfavorable for tearing open/adorn, being shifted of device, for this reason, the inventor proposes to adopt magnetic to be connected between the valve handle with rigidity jib lubbing mechanism and pipeline outer wall, pipeline: perhaps, and rigidity jib lubbing mechanism employing magnetic material making (magnetic material itself is exactly the good conductor of acoustic signal); Consider that the whole cost that adopts magnetic material to make of rigidity jib lubbing mechanism is too expensive, can also adopt the good conductor material rigidity jib lubbing mechanism of the sound except that magnetic material, large end face is provided with groove in rigidity jib lubbing mechanism bottom, permanent magnet is set in the groove, by permanent magnet the rigidity jib lubbing mechanism is adsorbed on pipeline or valve surface, and the permanent magnet number that is provided with is more than 1 or 1, the permanent magnet number is 1 when above, preferably permanent magnet is arranged on the position of pipeline both sides, rigidity jib lubbing mechanism upper edge.
When the rigidity jib lubbing mechanism was connected with pipeline outer wall, the rigidity jib lubbing mechanism was along the thickness of pipeline axial, and this thickness is less than 1/6 of the vibration wavelength of propagating in pipeline.
Useful technique effect of the present invention is: the new equipment that a kind of pipe leakage vibration signals collecting is provided, this device is passed to sensor after vibration can being converged, the input of sensor is strengthened, output signal-to-noise ratio improves, improved the detection performance of pipeline leakage testing positioning device, and this device is installed, conveniently moving.
Description of drawings
The rigidity jib lubbing mechanism profile schematic representation of Fig. 1, the linear variation of cross section;
The rigidity jib lubbing mechanism profile schematic representation that Fig. 2, cross section exponentially change;
Fig. 3, cross section become the rigidity jib lubbing mechanism profile schematic representation of stepped change;
The rigidity jib lubbing mechanism profile schematic representation of Fig. 4, frustoconic shape;
Fig. 5, the rigidity jib lubbing mechanism was provided with position view when pipeline outer wall was detected;
Fig. 6, the rigidity jib lubbing mechanism was provided with position view when valve handle was detected.
Embodiment
In fact, be identical perpendicular to the vibration of pipeline plane radially and tube wall intersection each point, its phase place is on all four, if the vibration of tube wall each point is superposeed, because the vibration homophase can not suppress to offset each other, the result of stack is that vibration strengthens.Gather if can compile the vibration of these points, just can improve the signal energy that sensor 2 is gathered, thereby improve the signal to noise ratio of sensor 2 outputs.
Just be based on aforementioned thinking, the inventor has proposed device of the present invention, rigidity jib lubbing mechanism 1 of the present invention is actually a kind of strain and converges amplifying device, the ripple of in rigidity jib lubbing mechanism 1, propagating, along with perpendicular to the descending variation of the cross-section area of direction of wave travel, the energy of ripple converges, specific to rigidity jib lubbing mechanism 1, its effect is to converge the vibration displacement of the large end face of rigidity jib lubbing mechanism 1 or amplitude, and vibrational energy is concentrated on the small end face, plays cumulative action.Large end face and pipeline outer wall 3 or other devices that link to each other with pipeline, as fire hydrant, valve handle 4 etc., contact, small end face and sensor 2 join, when pipe leakage causes pipe vibration, at first be energized vibration with the contacted large end face of pipe surface, because the tube wall each point vibration phase that contacts with large end face is a basically identical, the vibration homophase, can not suppress each other to offset, be superimposed and converge to small end face gradually and gathered by sensor 2, the vibration in small end face zone has obtained enhancing with respect to the large end face zone, thereby the input signal of sensor 2 is enhanced.
Be N if establish the area ratio of the large and small end face of rigidity jib lubbing mechanism 1, the pipe vibration amplitude that large end face is experienced is A, then as can be known according to the jib lubbing mechanism principle, Oscillation Amplitude should be g * A at the small end face place, and wherein g is the multiple that amplitude A is exaggerated, and under ideal conditions, g is approximately equal to N, promptly the Oscillation Amplitude of experiencing at the small end face place be Oscillation Amplitude that large end face is experienced g doubly, this vibration that has strengthened is passed to sensor 2, thereby reaches the purpose that strengthens tested oscillating signal.
For the oscillating signal of collection conduit better, the area of the large end face of rigidity jib lubbing mechanism 1 is the bigger the better in theory, but should guarantee that simultaneously by gathering the vibration that intensifier propagates into sensor 2 be that stack strengthens, and the useful area maximization that guarantees large end face, so, when the oscillating signal at collection tube pipeline outer wall 3 places, in order to fit closely with pipeline outer wall 3, the large end face of rigidity jib lubbing mechanism 1 is a cambered surface, the radius of cambered surface and the consistent or basically identical of pipeline outer wall 3 radiuses, and the cross section of rigidity jib lubbing mechanism 1, gradually changes by from small to large mode to large end face from small end face.Before surface analysis perpendicular to pipeline radially the plane and the vibration and the phase place of tube wall intersection each point be on all four, also be rigidity jib lubbing mechanism 1 and the cambered surface of pipeline outer wall 3 contacting points does not only have negative effect to the transmission of signal, also can increase the area of contact of rigidity jib lubbing mechanism 1 and pipeline outer wall 3 on the contrary, make the useful area of received signal become big.Referring to Fig. 1 to 3, the structure of the jib lubbing mechanism of rigidity shown in Fig. 11, a similar trapezoid body that lower surface is an arc shaped surface is known when us just to calculate the multiple that oscillating signal that sensor 2 receives is enhanced after the arc length of the height of upper and lower bottom width, trapezoid body of this trapezoid body and arc shaped surface.In like manner, the structure of Fig. 2 and rigidity jib lubbing mechanism 1 shown in Figure 3 also can obtain the multiple that oscillating signal that sensor 2 receives is enhanced by correlation computations.Because the significantly raising of Signal-to-Noise can be so that follow-up detection sensitivity and Location accuracy also improve thereupon.
When needs are gathered the oscillating signal at valve handle 4 places of pipeline, device setting principle during with collection tube pipeline outer wall 3 place oscillating signals is the same, in order to fit closely with valve handle 4, the large end face of rigidity jib lubbing mechanism 1 is the plane, in order to enlarge the area of large end face as far as possible, be designed to circle with large end face this moment, it is 1 one-tenth frustoconic shape of whole rigidity jib lubbing mechanism, referring to Fig. 4, round platform bottom surface area and valve handle 4 large end face areas are same or similar, so both satisfied the area needs of large end face, satisfied the principle of " from small end face to large end face, gradually changing " again by from small to large mode.
When rigidity jib lubbing mechanism 1 was connected with pipeline outer wall 3, rigidity jib lubbing mechanism 1 was along the thickness of pipeline axial, and in theory, the signal effect of the more little then device of this thickness output is good more; Because the vibration wave of in pipeline, propagating, at same section, along the circumferential vibration phase of pipeline is identical, (phase place along the cross section of pipeline axial continuous distributed gradually changes and there are differences along between the phase place at pipeline axial different cross section place, if the axial distance between the cross section is separated by too big, it is big that the difference of phasetophase also can become thereupon), thickness is too thick, device can receive the vibration of more out of phase simultaneously and superpose and the phase mutual interference, has caused the effect of output signal to reduce on the contrary; A kind of optimal way that the inventor proposes is: this thickness satisfy condition " less than the vibration wavelength of in pipeline, propagating 1/6 " prerequisite under, it is just passable only to need assurance device steadily to place on pipeline, so just can make the signal to noise ratio of device output signal reach an effect preferably.When rigidity jib lubbing mechanism 1 is connected with the valve handle 4 of pipeline, there is not aforesaid thickness limits, it is according to being exactly " vibration wave of propagating in the pipeline; at same section; along the circumferential vibration phase of pipeline is identical " introduced previously, and valve handle 4 is disc types, is identical so be delivered to the phase place of the vibration wave of valve handle 4 end faces, and the vibration that more out of phase can not occur is received stack and the problem of phase mutual interference simultaneously.
Fig. 5,6 is the rigidity jib lubbing mechanism 1 of two kinds of structures schematic representation when being arranged on the pipeline.
Claims (6)
1. pipe leakage vibration signals collecting intensifier, it is characterized in that: it is made up of rigidity jib lubbing mechanism (1) and sensor (2); Wherein, rigidity jib lubbing mechanism (1) one end is a large end face, and large end face is connected with the valve handle (4) of pipeline outer wall (3) or pipeline; Rigidity jib lubbing mechanism (1) the other end is a small end face, and small end face is the plane, and small end face is connected with sensor (2); The cross sectional area of rigidity jib lubbing mechanism (1), changes by from small to large mode to large end face from small end face.
2. pipe leakage vibration signals collecting intensifier according to claim 1, it is characterized in that: rigidity jib lubbing mechanism (1) and pipeline outer wall (3) are when being connected, large end face is a cambered surface, the longitudinal section of rigidity jib lubbing mechanism (1) is a zhou duicheng tuxing, symmetry axis is: intersect vertically with the circle core shaft of large end face cambered surface, and with the vertical straight line in plane, small end face place.
3. pipe leakage vibration signals collecting intensifier according to claim 2, it is characterized in that: the cross sectional area size of rigidity jib lubbing mechanism (1), to large end face, the version by linearity, index or ladder gradually changes from small to large from small end face.
4. pipe leakage vibration signals collecting intensifier according to claim 1, it is characterized in that: the valve handle (4) of rigidity jib lubbing mechanism (1) and pipeline is when being connected, rigidity jib lubbing mechanism (1) profile is a round platform, the small end face of round platform is connected with sensor (2), and the large end face of round platform is connected with the large end face of valve handle (4).
5. pipe leakage vibration signals collecting intensifier according to claim 1, it is characterized in that: adopt magnetic to be connected between the valve handle (4) of rigidity jib lubbing mechanism (1) and pipeline outer wall (3), pipeline: perhaps, rigidity jib lubbing mechanism (1) adopts the magnetic material making; Perhaps, the good conductor material of rigidity jib lubbing mechanism (1) employing sound is provided with groove at the large end face of rigidity jib lubbing mechanism (1), and permanent magnet (5) is set in the groove, and permanent magnet (5) number that is provided with is more than 1 or 1.
6. pipe leakage vibration signals collecting intensifier according to claim 1, it is characterized in that: rigidity jib lubbing mechanism (1) and pipeline outer wall (3) are when being connected, rigidity jib lubbing mechanism (1) is along the thickness of pipeline axial, and this thickness is less than 1/6 of the vibration wavelength of propagating in pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100547024A CN102182937A (en) | 2011-03-08 | 2011-03-08 | Pipeline leakage vibration signal acquisition enhancing device |
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| CN2011100547024A CN102182937A (en) | 2011-03-08 | 2011-03-08 | Pipeline leakage vibration signal acquisition enhancing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016057037A1 (en) * | 2014-10-09 | 2016-04-14 | Halliburton Energy Services, Inc. | Enhanced acoustic sensing system |
| CN112324745A (en) * | 2019-09-24 | 2021-02-05 | 杨丽璇 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
| CN114576565A (en) * | 2022-03-02 | 2022-06-03 | 西安热工研究院有限公司 | Pipeline leakage detection protection system based on pipeline vibration detection |
| CN117927884A (en) * | 2024-03-21 | 2024-04-26 | 天津市正方科技发展有限公司 | Pipeline leakage detection device and method based on acoustic and vibration sensors |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100883A (en) * | 1985-01-23 | 1986-08-20 | 株式会社日立制作所 | Fuel atomizer |
| US20020073768A1 (en) * | 2000-09-01 | 2002-06-20 | Joynes George Malcolm Swift | Fluid flow sensors & leak detection systems |
| JP2006308401A (en) * | 2005-04-28 | 2006-11-09 | Daiichi Nekken Co Ltd | Corrosive gas analysis sensor |
| CN101603630A (en) * | 2009-05-08 | 2009-12-16 | 上海能信石油科技服务有限公司 | The monitoring pipeline vibration system and method |
-
2011
- 2011-03-08 CN CN2011100547024A patent/CN102182937A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100883A (en) * | 1985-01-23 | 1986-08-20 | 株式会社日立制作所 | Fuel atomizer |
| US20020073768A1 (en) * | 2000-09-01 | 2002-06-20 | Joynes George Malcolm Swift | Fluid flow sensors & leak detection systems |
| JP2006308401A (en) * | 2005-04-28 | 2006-11-09 | Daiichi Nekken Co Ltd | Corrosive gas analysis sensor |
| CN101603630A (en) * | 2009-05-08 | 2009-12-16 | 上海能信石油科技服务有限公司 | The monitoring pipeline vibration system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016057037A1 (en) * | 2014-10-09 | 2016-04-14 | Halliburton Energy Services, Inc. | Enhanced acoustic sensing system |
| CN112324745A (en) * | 2019-09-24 | 2021-02-05 | 杨丽璇 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
| CN112324745B (en) * | 2019-09-24 | 2022-06-10 | 杨丽璇 | Portable hydraulic system leakage signal acquisition device and acquisition method thereof |
| CN114576565A (en) * | 2022-03-02 | 2022-06-03 | 西安热工研究院有限公司 | Pipeline leakage detection protection system based on pipeline vibration detection |
| CN117927884A (en) * | 2024-03-21 | 2024-04-26 | 天津市正方科技发展有限公司 | Pipeline leakage detection device and method based on acoustic and vibration sensors |
| CN117927884B (en) * | 2024-03-21 | 2024-05-28 | 天津市正方科技发展有限公司 | Pipeline leakage detection device and method based on acoustic and vibration sensors |
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Application publication date: 20110914 |