CN105987284A - Pipeline leakage monitoring method and device - Google Patents
Pipeline leakage monitoring method and device Download PDFInfo
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- CN105987284A CN105987284A CN201510041235.XA CN201510041235A CN105987284A CN 105987284 A CN105987284 A CN 105987284A CN 201510041235 A CN201510041235 A CN 201510041235A CN 105987284 A CN105987284 A CN 105987284A
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Abstract
The invention provides a pipeline leakage monitoring method and device. The pipeline leakage monitoring method includes: acquiring the flow and the pressure of the head end and the tail end of a pipeline; determining if pressure curves of the head end and the tail end of the pipeline have inflection points or not when inflection points of the pressure curve of the head end or the tail end of the pipeline appear, and recording a time difference between the first time that the inflection point of the pressure curve of the head end of the pipeline appears and the second time that the inflection point of the pressure curve of the tail end of the pipeline appears if the pressure curves of the head end of the tail end of the pipeline have the inflection points; and determining a distance between a leakage point and the head end of the pipeline or the tail end of the pipeline according to the time difference and the spread speed of pressure wave of liquid in the pipeline. The method can complete accurate positioning of the leakage point of the pipeline according to the change of the flow of the two ends of the pipeline and the time difference of the inflection points of the pressure curves.
Description
Technical field
The present invention relates to petroleum pipeline technology, particularly relate to a kind of line leakage method and device.
Background technology
When carrying out collection and the conveying of oil or natural gas in oil field, owing to transfer pipeline circuit is longer,
It is difficult to rely on and is manually managed.And breakage or artificial destruction etc. can cause conduit wiring piercing or disconnected naturally
Split, if can not find in time to process in time, not only affect production also result in oil product miss in a large number, dirty
A series of adverse consequencess such as dye environment, cause tremendous economic to lose.Accordingly, it would be desirable to transportation pipe
Whether road has leakage situation to be monitored.
Currently, existing oil field transfer pipeline monitoring technology, is to be respectively provided with at the two ends of transfer pipeline
There are effusion meter or pressure transducer, certain section of pipeline between transfer pipeline two ends occur leakage is existing
As time, the effusion meter at transfer pipeline two ends or pressure transducer detect changing of flow or force value
Become, and send the warning information of pipeline leakage.
But, current transfer pipeline monitoring technology cannot know the accurate position of leakage point on transfer pipeline
Put.
Summary of the invention
The present invention provides a kind of line leakage method and device, by comprehensive utilization pipe ends flow
Change and the time difference of pressure curve flex point, to complete being accurately positioned of leakage point on pipeline.
First aspect, the present invention provides a kind of line leakage method, including:
Gather the head end of pipeline and the flow of end and pressure；Respectively the flow collected is carried out with pressure
Filtering Processing, obtains for representing the time dependent smooth flow curve of flow and for representing pressure
Time dependent smooth pressure curve；
When there is flex point in the flow curve of pipeline head end or end, it is judged that pipeline head end and the pressure of end
Whether curve has flex point, if the pressure curve of pipeline head end and end all has flex point, then record pipeline is first
There is second when flex point occur in the very first time of flex point and the pressure curve of pipe end in the pressure curve of end
Time, and determine the time difference between the very first time and the second time；
Determine the spread speed of fluid pressure ripple in pipeline, and according to fluid pressure in time difference and pipeline
The spread speed of ripple determines the distance of leakage point and pipeline head end or leak point and pipe end.
In conjunction with first aspect, in the first embodiment, the described flow collected is filtered place
Reason, the flow curve obtaining smoothing specifically includes: utilize the numerical analysis method flow to collecting to carry out
Filtering Processing, obtains the flow curve smoothed.
In conjunction with first aspect, in the second embodiment, the described pressure collected is filtered place
Reason, the pressure curve obtaining smoothing specifically includes: utilize Mean Filtering Algorithm and digital first-order low-pass
The pressure collected is filtered processing by ripple algorithm, obtains the pressure curve smoothed.
In conjunction with first aspect and first two embodiment, in the third embodiment, it is judged that pressure curve
Before whether having flex point, also include: utilize user datagram protocol UDP protocol transmission time synchronizing signal,
Synchronize with the clock time to pipeline head end and end.
In conjunction with first aspect and first three embodiment, in the 4th kind of embodiment, determine liquid in pipeline
Body pressure-wave propagation speed specifically includes:
According toDetermine the spread speed of fluid pressure ripple in pipeline, wherein, α
For the spread speed of fluid pressure ripple in pipeline, K is the volume modulus of liquid in pipeline, and ρ is pipe
The density of liquid in road, E is the elastic modelling quantity of the material of pipeline, and D is the diameter of pipeline, and e is pipeline
Pipe thickness, C1Correction factor for pipeline.
In conjunction with first aspect and first three embodiment, in the 5th kind of embodiment, according to time difference
After the distance that the spread speed of fluid pressure ripple in pipeline determines leakage point and pipeline head end/end, also wrap
Include: occur that the flow volume change values after flex point determines the leakage rate of leakage point according to flow curve.
Second aspect, the present invention provides a kind of pipeline leakage monitor, including:
Acquisition module, for gathering the head end of pipeline and the flow of end and pressure；
Curve module, for being filtered processing to the flow collected and pressure respectively, obtains for table
Show the time dependent smooth flow curve of flow and for representing the time dependent smooth pressure of pressure
Force curve；
Time module, for when there is flex point in the flow curve of pipeline head end or end, it is judged that pipeline is first
Whether the pressure curve of end and end has flex point, if the pressure curve of pipeline head end and end all has flex point,
Then the pressure curve of record pipeline head end occurs that the very first time of flex point occurs with the pressure curve of pipe end
The second time during flex point, and determine the time difference between the very first time and the second time；
Position computation module, the spread speed of fluid pressure ripple in determining pipeline, and according to time difference
In value and pipeline, the spread speed of fluid pressure ripple determines the distance of leakage point and pipeline head end/end.
In conjunction with second aspect, in the first embodiment, curve module specifically for: utilize numerical value to divide
The flow collected is filtered processing by analysis method, obtains the flow curve smoothed.
In conjunction with second aspect, in the second embodiment, curve module specifically for: utilize average to filter
The pressure collected is filtered processing by ripple algorithm and digital first-order low-pass ripple algorithm, is smoothed
Pressure curve.
In conjunction with second aspect and first two embodiment, in the third embodiment, time module is used for
Before judging whether pressure curve has flex point, it is additionally operable to: utilize user datagram protocol UDP protocol transmission
Time synchronizing signal, synchronizes with the clock time to pipeline head end and end.
In conjunction with second aspect and first two embodiment, in the 4th kind of embodiment, position computation module
Specifically for:
According toDetermine the spread speed of fluid pressure ripple in pipeline, wherein, α
For the spread speed of fluid pressure ripple in pipeline, K is the volume modulus of liquid in pipeline, and ρ is pipe
The density of liquid in road, E is the elastic modelling quantity of the material of pipeline, and D is the diameter of pipeline, and e is pipeline
Pipe thickness, C1Correction factor for pipeline.
In conjunction with second aspect and first two embodiment, in the 5th kind of embodiment, position computation module
According to time difference and pipeline, the spread speed of fluid pressure ripple determines leakage point and pipeline head end/end
After the distance of end, it is additionally operable to: occur that the flow volume change values after flex point determines leakage point according to flow curve
Leakage rate.
The line leakage method and device of the present invention, first gathers the head end of pipeline and the flow of end
With pressure, it is filtered processing to the flow collected and pressure the most respectively, obtains for representing flow
Time dependent smooth flow curve is bent with for representing the time dependent smooth pressure of pressure
Line；Again when flex point occurs in the flow curve of pipeline head end or end, it is judged that pipeline head end and the pressure of end
Whether force curve has flex point, if the pressure curve of pipeline head end and end all has flex point, then records pipeline
The pressure curve of head end occurs when flex point occur in the very first time of flex point and the pressure curve of pipe end the
Two times, and determine the time difference between the very first time and the second time, finally determine liquid in pipeline
Pressure-wave propagation speed, and determine according to the spread speed of fluid pressure ripple in time difference and pipeline and let out
Leak source and the distance of pipeline head end/end.It is achieved in that on the basis of obtaining pipeline flow change, root
Judge that piping liquid pressure ripple arrives the time of pipe ends according to pipeline head end and terminal pressure point of inflexion on a curve
Difference, and determine whether leakage point distance pipeline head end or the distance of end, it is achieved thereby that pipe leakage
Being accurately positioned of point.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that under,
Accompanying drawing during face describes is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of the line leakage method that Fig. 1 provides for the embodiment of the present invention one；
Fig. 2 is the schematic diagram of the leakage model for pipeline that the embodiment of the present invention one provides；
Fig. 3 is the structural representation of the pipeline leakage monitor that the embodiment of the present invention two provides；
Fig. 4 is the structural representation of the pipeline leakage monitor that the embodiment of the present invention three provides.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
The schematic flow sheet of the line leakage method that Fig. 1 provides for the embodiment of the present invention one.Such as Fig. 1
Shown in, the line leakage method that the present embodiment provides includes:
S101, the head end of collection pipeline and the flow of end and pressure.
Concrete, pipe-line can be divided into some according to the pipe interface of pipe-line
Section, and at head end and the end of each segment pipe, sensor is set, to gather the flow number of head end and end
According to force value data.When carrying out data acquisition, various sensor of the prior art can be used to carry out
Gather, such as, effusion meter can be used to gather pipeline head end and the fluid flow of end, and utilize pressure to pass
Sensor gathers force value data.
S102, be filtered the flow collected and pressure respectively processing, obtain for represent flow with
The smooth flow curve of time change with for representing the time dependent smooth pressure curve of pressure.
After collecting the head end of one section of conveyance conduit and the flow of end and force value, because the pressure collected
Power and flow are all centrifugal pumps, it is therefore desirable to discrete pressure and the flow of different sampling stages are connected
Coming, be used for characterizing pressure with formation or flow is time dependent, more smooth curve is analyzed.
When gathering the flow of pipeline, though the duplex rotor meter that service precision is the highest, at input flow rate
In the case of the most stable, although integrated flow measuring accuracy is the highest, but its rotation is the most uneven, i.e. its
Instantaneous delivery remains fluctuation, and the actual characteristic of the effusion meter of every same type has difference.This
Sample is when carrying out data acquisition, if the sampling period is too small, the fluctuation that will result in instantaneous delivery is excessive,
Cannot accurately judge the generation moment of leakage.
The most smooth in order to ensure the flow curve collected, and can have turn clearly in leakage point
Point, it is possible to use the flow collected is filtered processing by numerical analysis method, obtains the flow smoothed
Curve.Concrete, instantaneous delivery can be predicted by computer software numerical statistic simulation means, and
The meansigma methods of current instantaneous delivery is calculated according to mean value method, average to filter out the current instantaneous delivery of deviation
Value discrete flow value too far, one smooth flow curve of final acquisition.
When gathering the pressure of pipeline head end and end, it is possible to use Mean Filtering Algorithm and digital one
The pressure collected is filtered processing by rank low-pass filtering algorithm, obtains the pressure curve smoothed.First
First, it is possible to use Mean Filtering Algorithm is filtered in periodically variable pressure parameter, to obtain
Smooth pressure curve, and when having more random disturbances for pressure, digital one can be taked
Rank low-pass filtering algorithm.Concrete, digital first-order low-pass ripple algorithm is:
Yn=a × Xn+(1-a)×Yn-1
In above formula:
XnThis sampled value for pipeline pressure；
Yn-1Filtering output value for pipeline pressure last time；
A is filter factor, and general provision A value is much smaller than 1；
YnFor pipeline pressure through this filtered output valve.
After the calculating of digital first-order low-pass ripple algorithm, the random disturbances in pressure can be given
To eliminate, the hardware cost of RC low pass filter can also be deducted simultaneously.
After above-mentioned filter step, the pressure that pipeline head end and end collect can be filtered
Ripple processes, to obtain more smooth pressure curve.
Through above-mentioned steps, pipeline head end and the flow curve of end and pressure curve can be respectively obtained,
Above-mentioned curve can be shown by display device, to allow monitoring personnel know pipe ends intuitively
Flow and pressure condition.
S103, when there is flex point in the flow curve of pipeline head end or end, it is judged that pipeline head end and end
Pressure curve whether have flex point, if the pressure curve of pipeline head end and end all has flex point, then record
The pressure curve of pipeline head end occurs when flex point occur in the very first time of flex point and the pressure curve of pipe end
The second time, and determine the time difference between the very first time and the second time.
Because this step is it needs to be determined that the time value of pressure curve flex point, therefore whether judging pressure curve
Before having flex point, need the clock time of pipeline head end and end is synchronized.Concrete, when carrying out
Between synchronize hardware mode to be used to realize time synchronized and software mode realizes time synchronized two ways.
When using hardware mode to realize time synchronized, it is possible to use global positioning system (Global
Positioning System, is called for short GPS) all of time is all synchronized into Beijing time, so to exist
Need on the head end of pipeline and the sensor of end to add gps satellite positioning module, use serial ports pattern
GPS module positioning precision can reach timing tracking accuracy and be less than 10ms, when using parallel port mode module,
Within precision can reach 1ms, industrial control system considers the expansion of system, main use serial ports mould
Formula GPS carries out time synchronized.But, use the gps time method of synchronization, need external antenna to catch extremely
Few 3 gps time synchronous satellites, the architecture of the most whole monitoring system becomes complex, and
And simultaneously need to consider antenna cable lays the factors such as lightning protection with antenna, add system maintenance
Workload.
When using software mode to carry out time synchronized, by the way of time calibration in network, typically carry out the time same
Step is concrete, it is possible to use User Datagram Protocol (User Datagram Protocol is called for short UDP)
Transmission time synchronizing signal, thus respectively time and the fiducial time of pipeline head end with end is compared,
With correction time difference.The advantage utilizing udp protocol transmission time synchronizing signal is as follows: bad at network
In the case of, after sending out time synchronized bag, can not receive confirmation bag, can directly confirm this failure,
The unnecessary confirmation re-transmission carrying out complexity and the packet header of udp protocol own are 8 bytes, and occupied bandwidth is narrower.
Therefore, after employing udp protocol, the reliability of transmission time synchronizing signal is higher so that whole system
Time degree of stability there has also been bigger raising.
After carrying out time synchronized, i.e. can obtain the time value that pressure curve flex point occurs.Concrete, because of
For in or the pipeline of pressure less (0.2～0.3MPa) relatively big in pressure oscillation, due to the suction wave produced
The least, after being delivered to detector, energy is the lowest, is often submerged and differentiates unclear, so first
Whether flow curve is judged have leakage situation to occur to screen.Because the input of airtight pipeline
Amount sum is equal to the output sum of pipeline, so flex point occurs in the flow curve working as pipeline head end or end
Time, can determine that between this pipe ends, flow occurs in that change, i.e. have leakage to occur.At this time, it may be necessary to sentence
Whether the pressure curve of disconnected pipeline head end and end has flex point, if pipeline head end and the pressure curve of end
All have flex point, then there is the very first time and this pipe end of flex point in the pressure curve recording this pipeline head end
Pressure curve the second time of flex point occurs.
Concrete, when leakage situation occurring between pipeline head end and end, because the pressure meeting of leakage point
Suddenly reducing, the NPW simultaneously produced will be propagated along pipeline to two ends, and cause pipeline head end and pipe
Necessarily declining all can occur suddenly in the force value that road end is monitored, and the pressure curve of pipeline head end with
The pressure curve of pipe end also can reduce the most suddenly, and from level then be rendered as one section more
Precipitous decline state.Because in pipeline the instant exposure speed of NPW be dielectric viscosity, density,
The function of the value such as pipe diameter, elastic modelling quantity.Thus with the difference of leak position, pipe ends is monitored
The time declined to pressure is the most different.Now, the pressure curve of pipeline head end and pipe end is horizontal
State is pipe ends to the time at the flex point of decline state and monitors the time that pressure declines, by its point
It is not recorded as the very first time and the second time, and determines the time difference between the very first time and the second time.
Fig. 2 is the schematic diagram of the leakage model for pipeline that the embodiment of the present invention one provides.Shown in Fig. 2
As a example by leakage model for pipeline, it is respectively provided with head end pressure-measuring-point p at the upstream and downstream two ends of pipeline1, and end
Pressure-measuring-point p2, head end pressure-measuring-point p1The pressure data collected forms the pressure curve of pipeline head end,
Terminal pressure measuring point p2The pressure data collected forms the pressure curve of line end.At the X of pipeline
Occur leakage time, leakage produce suction wave i.e. with certain speed alpha respectively to head end and the end of pipeline
Propagate, at t and t+ τ0Moment is by sensor p1、p2Detect.Therefore, pipeline head end pressure curve
Time at flex point is t, and the time at pipe end pressure curve flex point is t+ τ0。
S104, determine the spread speed of fluid pressure ripple in pipeline, and according to liquid in time difference and pipeline
Body pressure-wave propagation speed determines the distance of leakage point and pipeline head end/end.
Or as a example by the leakage model for pipeline in Fig. 2, if a length of L between pipeline head end and end,
X is the distance of pipeline internal leakage point distance pipeline head end, thus the distance of leakage point distance pipe end is
L-X。
Available relationship below:
Ranging formula is solved as follows according to above formula:
Wherein, X is the distance between leakage point and pipeline head end；
L is the distance (pipe range) between pipeline head end and pipe end；
α is the spread speed of fluid pressure ripple in pipeline；
τ0The time difference of flex point is produced for pipeline head end and terminal pressure curve.
Therefore, it can the time difference of pressure curve flex point by pipeline head end and end and liquid in pipeline
Body pressure-wave propagation speed, calculates leakage point distance pipeline head end or the distance of distance pipe end.
Concrete, in pipeline, the spread speed of fluid pressure ripple can be according to the situation of liquid in pipeline and pipe
The geomery in road itself is determined, it is thus determined that in pipeline during the spread speed of fluid pressure ripple, specifically
The spread speed of fluid pressure ripple in pipeline can be determined according to below equation:
Wherein,
α is the spread speed of fluid pressure ripple in pipeline；
K is the volume modulus of liquid in pipeline；
ρ is the density of liquid in pipeline；
E is the elastic modelling quantity of the material of pipeline；
D is the diameter of pipeline；
E is the pipe thickness of pipeline；
C1Correction factor for pipeline.
After the spread speed of fluid pressure ripple in above formula acquisition pipeline, can be in conjunction with above-mentioned time difference
Determine the distance of leakage point and pipeline head end/end.
Optionally, according to time difference and pipeline the spread speed of fluid pressure ripple determine leakage point and
After gathering the distance of pipeline head end/end, it is also possible to according to flow curve, the flow volume change values after flex point occurs
Determine the leakage rate of leakage point.Specifically the flow curve after the flex point time can be integrated, to obtain
Flow volume change values after flex point.
In the present embodiment, first gather the head end of pipeline and the flow of end and pressure, the most respectively to adopting
Collect to flow and pressure be filtered processing, obtain for representing the time dependent smooth stream of flow
Discharge curve with for representing the time dependent smooth pressure curve of pressure；Again when pipeline head end or end
Flow curve time flex point occurs, it is judged that whether the pressure curve of pipeline head end and end has flex point, if
The pressure curve of pipeline head end and end all has flex point, then flex point occurs in the pressure curve of record pipeline head end
The second time time flex point occurs of the pressure curve of the very first time and pipe end, and determine the very first time
And the time difference between the second time, finally determines the spread speed of fluid pressure ripple in pipeline, and root
Leakage point and pipeline head end/end is determined according to the spread speed of fluid pressure ripple in time difference and pipeline
Distance.It is achieved in that on the basis of obtaining pipeline flow change, according to pipeline head end and terminal pressure
Point of inflexion on a curve judges that piping liquid pressure ripple arrives the time difference of pipe ends, and determines whether leakage
Point distance pipeline head end or the distance of end, it is achieved thereby that being accurately positioned of pipe leakage point.
Fig. 3 is the structural representation of the pipeline leakage monitor that the embodiment of the present invention two provides.Such as Fig. 3
Shown in, the pipeline leakage monitor 31 that the present embodiment provides includes:
Acquisition module 301, for gathering the head end of pipeline and the flow of end and pressure；
Curve module 302, for being filtered processing to the flow collected and pressure respectively, is used
In representing the time dependent smooth flow curve of flow and being used for representing that pressure is time dependent smooth
Pressure curve；
Time module 303, for when there is flex point in the flow curve of pipeline head end or end, it is judged that pipe
Whether the pressure curve of road head end and end has flex point, if the pressure curve of pipeline head end and end all has
Flex point, then the pressure curve of record pipeline head end occurs that the very first time of flex point is bent with the pressure of pipe end
There is the second time during flex point in line, and determines the time difference between the very first time and the second time；
Position computation module 304, for determining the spread speed of fluid pressure ripple in pipeline, and according to time
Between in difference and pipeline the spread speed of fluid pressure ripple determine the distance of leakage point and pipeline head end/end.
Concrete, curve module 302 is carried out specifically for utilizing the numerical analysis method flow to collecting
Filtering Processing, obtains the flow curve smoothed.
Concrete, curve module 302 is specifically additionally operable to utilize Mean Filtering Algorithm and digital single order low pass
The pressure collected is filtered processing by filtering algorithm, obtains the pressure curve smoothed.
Concrete, before time module 303 is used for judging whether pressure curve has flex point, it is additionally operable to utilize
User datagram protocol UDP protocol transmission time synchronizing signal, with during to the clock of pipeline head end and end
Between synchronize.
Concrete, position computation module 304 specifically for: according to
Determining the spread speed of fluid pressure ripple in pipeline, wherein, α is pipe
The spread speed of fluid pressure ripple in road, K is the volume modulus of liquid in pipeline, in ρ is pipeline
The density of liquid, E is the elastic modelling quantity of the material of pipeline, and D is the diameter of pipeline, and e is the tube wall of pipeline
Thickness, C1Correction factor for pipeline.
Concrete, position computation module 304 is the propagation of fluid pressure ripple according to time difference and pipeline
After speed determines the distance of leakage point and pipeline head end/end, after being additionally operable to, according to flow curve, flex point occurs
Flow volume change values determine the leakage rate of leakage point.
The pipeline leakage monitor that the present embodiment is provided, can perform such as pipeline in previous embodiment one
The concrete steps of leakage monitoring method, here is omitted.
In the present embodiment, the acquisition module of pipeline leakage monitor is for gathering head end and the end of pipeline
Flow and pressure；Curve module, for being filtered processing to the flow collected and pressure respectively, obtains
To smooth flow curve and smooth pressure curve；Time module is for when pipeline head end or the stream of end
When there is flex point in discharge curve, it is judged that whether the pressure curve of pipeline head end and end has flex point, if pipeline
The pressure curve of head end and end all has a flex point, then the of flex point occurs in the pressure curve of record pipeline head end
There is the second time during flex point in the pressure curve of one time and pipe end, and determines the very first time and the
Time difference between two times；Position computation module is the propagation speed of fluid pressure ripple in determining pipeline
Degree, and according to the spread speed of fluid pressure ripple in time difference and pipeline determine leakage point and pipeline head end/
The distance of end.It is achieved in that on the basis of obtaining pipeline flow change, according to pipeline head end and end
End pressure point of inflexion on a curve judges that piping liquid pressure ripple arrives the time difference of pipe ends, and sentences further
Disconnected leakage point distance pipeline head end or the distance of end, it is achieved thereby that being accurately positioned of pipe leakage point.
Fig. 4 is the structural representation of the pipeline leakage monitor that the embodiment of the present invention three provides.Such as Fig. 4
Shown in, the pipeline leakage monitor 41 that the present embodiment provides includes:
Sensor 401, for gathering the head end of pipeline and the flow of end and pressure；
Processor 402, processes for being filtered the flow collected and pressure respectively, obtain for
Represent that the time dependent smooth flow curve of flow is smooth with for represent that pressure pleads in time
Pressure curve；
When there is flex point in the flow curve of pipeline head end or end, it is judged that pipeline head end and the pressure of end
Whether curve has flex point, if the pressure curve of pipeline head end and end all has flex point, then record pipeline is first
There is second when flex point occur in the very first time of flex point and the pressure curve of pipe end in the pressure curve of end
Time, and determine the time difference between the very first time and the second time；
Determine the spread speed of fluid pressure ripple in pipeline, and according to fluid pressure in time difference and pipeline
The spread speed of ripple determines the distance of leakage point and pipeline head end/end.
Concrete, the flow collected is filtered by processor 402 specifically for utilizing numerical analysis method
Ripple processes, and obtains the flow curve smoothed.
Concrete, processor 402 is specifically additionally operable to utilize Mean Filtering Algorithm and digital first-order low-pass
The pressure collected is filtered processing by ripple algorithm, obtains the pressure curve smoothed.
Concrete, before processor 402 is additionally operable to judge whether pressure curve has flex point, it is additionally operable to utilize
User datagram protocol UDP protocol transmission time synchronizing signal, with during to the clock of pipeline head end and end
Between synchronize.
Concrete, processor 402 is additionally operable to basis
Determining the spread speed of fluid pressure ripple in pipeline, wherein, α is pipe
The spread speed of fluid pressure ripple in road, K is the volume modulus of liquid in pipeline, in ρ is pipeline
The density of liquid, E is the elastic modelling quantity of the material of pipeline, and D is the diameter of pipeline, and e is the tube wall of pipeline
Thickness, C1Correction factor for pipeline.
Concrete, processor 402 spread speed of fluid pressure ripple according to time difference and pipeline is true
After determining the distance of leakage point and pipeline head end/end, it is additionally operable to, according to flow curve, the flow after flex point occurs
Changing value determines the leakage rate of leakage point.
In the present embodiment, the sensor in pipeline leakage monitor is for gathering head end and the end of pipeline
Flow and pressure；Processor, for being filtered processing to the flow collected and pressure respectively, obtains
Smooth flow curve and smooth pressure curve；When flex point occurs in the flow curve of pipeline head end or end
Time, it is judged that whether the pressure curve of pipeline head end and end has flex point, if pipeline head end and the pressure of end
Force curve all has flex point, then the very first time and the pipeline end of flex point occurs in the pressure curve of record pipeline head end
The second time when flex point occurs in the pressure curve of end, and determine between the very first time and the second time time
Between difference；Determine the spread speed of fluid pressure ripple in pipeline, and according to liquid in time difference and pipeline
Pressure-wave propagation speed determines the distance of leakage point and pipeline head end/end.It is achieved in that and has obtained pipe
On the basis of road changes in flow rate, judge pipeline pressure ripple according to pipeline head end and terminal pressure point of inflexion on a curve
Arrive the time difference of pipe ends, and determine whether leakage point distance pipeline head end or the distance of end,
It is achieved thereby that being accurately positioned of pipe leakage point.
One of ordinary skill in the art will appreciate that: realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer can
Read in storage medium.This program upon execution, performs to include the step of above-mentioned each method embodiment；And
Aforesaid storage medium includes: ROM, RAM, magnetic disc or CD etc. are various can store program code
Medium.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a line leakage method, it is characterised in that including:
Gather the head end of pipeline and the flow of end and pressure；
It is filtered processing to the described flow collected and described pressure respectively, obtains for representing described
The time dependent smooth flow curve of flow with for representing that described pressure is time dependent smooth
Pressure curve；
When there is flex point in the flow curve of described pipeline head end or end, it is judged that described pipeline head end and end
Whether the pressure curve of end has flex point, if the pressure curve of described pipeline head end and end all has flex point,
There is the very first time of flex point and the pressure of described pipe end in the pressure curve then recording described pipeline head end
There is the second time during flex point in curve, and determine between the described very first time and described second time time
Between difference；
Determine the spread speed of fluid pressure ripple in described pipeline, and according to described time difference and described pipe
In road, the spread speed of fluid pressure ripple determines leakage point and described pipeline head end or leak point and described pipe
The distance of road end.
Line leakage method the most according to claim 1, it is characterised in that described to collection
To described flow be filtered process, the flow curve obtaining smoothing specifically includes:
Utilize numerical analysis method to be filtered the described described flow collected processing, obtain smoothing
Flow curve.
Line leakage method the most according to claim 1, it is characterised in that described to collection
To described pressure be filtered process, the pressure curve obtaining smoothing specifically includes:
Utilize Mean Filtering Algorithm and digital first-order low-pass ripple algorithm that the described pressure collected is carried out
Filtering Processing, obtains the pressure curve smoothed.
4. according to the line leakage method described in any one of claim 1-3, it is characterised in that institute
State before judging whether pressure curve has flex point, also include:
Utilize user datagram protocol UDP protocol transmission time synchronizing signal, with to described pipeline head end and
The clock time of end synchronizes.
5. according to the line leakage method described in any one of claim 1-3, it is characterised in that institute
State and determine that the spread speed of fluid pressure ripple specifically includes in described pipeline:
According toDetermine the spread speed of fluid pressure ripple in described pipeline, its
In, α is the spread speed of fluid pressure ripple in described pipeline, and K is the volume elasticity of liquid in described pipeline
Coefficient, ρ is the density of liquid in described pipeline, and E is the elastic modelling quantity of the material of described pipeline, and D is
The diameter of described pipeline, e is the pipe thickness of described pipeline, C1Correction factor for described pipeline.
6. according to the line leakage method described in any one of claim 1-3, it is characterised in that institute
State and determine leakage point and described pipeline according to the spread speed of fluid pressure ripple in described time difference and pipeline
After the distance of head end/end, also include:
Flow volume change values after there is flex point according to described flow curve determines the leakage rate of described leakage point.
7. a pipeline leakage monitor, it is characterised in that including:
Acquisition module, for gathering the head end of pipeline and the flow of end and pressure；
Curve module, for being filtered processing to the described flow collected and described pressure respectively,
To for representing the time dependent smooth flow curve of described flow and for representing described pressure at any time
Between the smooth pressure curve of change；
Time module, for when there is flex point in the flow curve of described pipeline head end or end, it is judged that institute
Whether the pressure curve stating pipeline head end and end has flex point, if described pipeline head end and the pressure of end
Curve all has flex point, then the pressure curve recording described pipeline head end the very first time of flex point occurs with described
There is the second time during flex point in the pressure curve of pipe end, and determines the described very first time and described the
Time difference between two times；
Position computation module, the spread speed of fluid pressure ripple in determining described pipeline, and according to institute
State the spread speed of fluid pressure ripple in time difference and described pipeline and determine leakage point and described pipeline head end
The distance of/end.
Pipeline leakage monitor the most according to claim 7, it is characterised in that described curvilinear mold
Block specifically for:
Utilize numerical analysis method to be filtered the described described flow collected processing, obtain smoothing
Flow curve.
Pipeline leakage monitor the most according to claim 7, it is characterised in that described curvilinear mold
Block specifically for:
Utilize Mean Filtering Algorithm and digital first-order low-pass ripple algorithm that the described pressure collected is carried out
Filtering Processing, obtains the pressure curve smoothed.
10. according to the pipeline leakage monitor described in any one of claim 7-9, it is characterised in that
Before described time module is used for judging whether pressure curve has flex point, it is additionally operable to:
Utilize user datagram protocol UDP protocol transmission time synchronizing signal, with to described pipeline head end and
The clock time of end synchronizes.
11. according to the pipeline leakage monitor described in any one of claim 7-9, it is characterised in that
Described position computation module specifically for:
According toDetermine the spread speed of fluid pressure ripple in described pipeline, its
In, α is the spread speed of fluid pressure ripple in described pipeline, and K is the volume elasticity of liquid in described pipeline
Coefficient, ρ is the density of liquid in described pipeline, and E is the elastic modelling quantity of the material of described pipeline, and D is
The diameter of described pipeline, e is the pipe thickness of described pipeline, C1Correction factor for described pipeline.
12. according to the pipeline leakage monitor described in any one of claim 7-9, it is characterised in that
Described position computation module spread speed of fluid pressure ripple according to described time difference and pipeline determines
After the distance of leakage point and described pipeline head end/end, it is additionally operable to:
Flow volume change values after there is flex point according to described flow curve determines the leakage rate of described leakage point.
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| CN107084313A (en) * | 2017-05-16 | 2017-08-22 | 云南大红山管道有限公司 | Ore slurry pipeline leaks positioning alarm system and method |
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| CN111365623B (en) * | 2020-03-09 | 2021-01-19 | 大连理工大学 | Negative pressure wave inflection point identification method based on linear fitting |
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| CN113654899A (en) * | 2021-07-30 | 2021-11-16 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Pressure analysis method, device and equipment for conveying pipeline and storage medium |
| CN113654899B (en) * | 2021-07-30 | 2023-12-22 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Pressure analysis method, device, equipment and storage medium for conveying pipeline |
| CN114025251A (en) * | 2021-11-03 | 2022-02-08 | 国家石油天然气管网集团有限公司华南分公司 | Method, device and medium for alarming abnormality of instrument |
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| CN113836680B (en) * | 2021-11-25 | 2022-03-08 | 德仕能源科技集团股份有限公司 | Automatic filling method and technology for petroleum oil pipe |
| CN114017685A (en) * | 2021-11-26 | 2022-02-08 | 国家石油天然气管网集团有限公司华南分公司 | Method, device and medium for detecting leakage of finished oil pipeline |
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