CN105987284B - Line leakage method and device - Google Patents
Line leakage method and device Download PDFInfo
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- CN105987284B CN105987284B CN201510041235.XA CN201510041235A CN105987284B CN 105987284 B CN105987284 B CN 105987284B CN 201510041235 A CN201510041235 A CN 201510041235A CN 105987284 B CN105987284 B CN 105987284B
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Abstract
The present invention provides a kind of line leakage method and device.Monitoring Pinpelines provided by the invention leak method, including：Acquire the head end of pipeline and the flow and pressure of end；When there is inflection point in the flow curve of the pipeline head end or end, judge whether the pressure curve of the pipeline head end and end has inflection point, the time difference between the second time if the pipeline head end and the pressure curve of end have inflection point, when inflection point occurs in the pressure curve that the first time of inflection point and the pipe end occurs in the pressure curve for recording the pipeline head end；And determine leakage point at a distance from the pipeline head end or leak point and the pipe end according to the spread speed of liquid pressure Reeb in the time difference and the pipeline.The change with pipe ends flow and the time difference of pressure curve inflection point may be implemented in the present invention, completes the accurate positionin of leakage point on pipeline.
Description
Technical field
The present invention relates to petroleum pipeline technology more particularly to a kind of line leakage method and devices.
Background technique
When oil field carries out the acquisition and conveying of petroleum or natural gas, since transfer pipeline route is longer, it is difficult to rely on people
Work is managed.And damaged or artificial destruction etc. will cause conduit wiring piercing or fracture naturally, if cannot find to handle in time in time,
It not only influences production and also results in oil product a series of adverse consequences such as largely to miss, pollute environment, cause huge economic losses.Cause
Whether this, need to have leakage situation to be monitored transportation pipeline.
Currently, existing oil field transfer pipeline monitoring technology, be the both ends of transfer pipeline be respectively arranged with flowmeter or
Person's pressure sensor, when there is leakage phenomenon on certain section of pipeline between transfer pipeline both ends, the flow at transfer pipeline both ends
Meter or pressure sensor detect the change of flow or pressure value, and issue the warning information of pipeline leakage.
However, current transfer pipeline monitoring technology can not know the accurate location of leakage point on transfer pipeline.
Summary of the invention
The present invention provides a kind of line leakage method and device, by comprehensively utilize pipe ends flow change with
And the time difference of pressure curve inflection point, to complete the accurate positionin of leakage point on pipeline.
In a first aspect, the present invention provides a kind of line leakage method, including：
Acquire the head end of pipeline and the flow and pressure of end；Place is filtered to collected flow and pressure respectively
Reason, obtain for indicate smooth flow curve that flow changes over time with it is smooth for indicate that pressure changes over time
Pressure curve；
When there is inflection point in the flow curve of pipeline head end or end, judge pipeline head end and end pressure curve whether
There is inflection point, if pipeline head end and the pressure curve of end have inflection point, inflection point occurs in the pressure curve for recording pipeline head end
The second time when there is inflection point of first time and the pressure curve of pipe end, and determine at the first time and the second time it
Between time difference；
Determine the spread speed of liquid pressure Reeb in pipeline, and according to the propagation of liquid pressure Reeb in time difference and pipeline
Speed determines leakage point at a distance from pipeline head end or leak point and pipe end.
With reference to first aspect, in the first embodiment, the collected flow is filtered, is put down
Sliding flow curve specifically includes：Collected flow is filtered using numerical analysis method, obtains smooth stream
Measure curve.
With reference to first aspect, in the second embodiment, the collected pressure is filtered, is put down
Sliding pressure curve specifically includes：Using Mean Filtering Algorithm and digital first-order low-pass wave algorithm to collected pressure into
Row filtering processing, obtains smooth pressure curve.
Judge whether pressure curve turns in the third embodiment with first two embodiment with reference to first aspect
Before point, further include：Using user datagram protocol UDP agreement transmission time synchronization signal, to pipeline head end and end
Clock time synchronizes.
Liquid pressure Reeb in pipeline is determined in the 4th kind of embodiment with first three embodiment with reference to first aspect
Spread speed specifically include：
According toDetermine the spread speed of liquid pressure Reeb in pipeline, wherein α is pipeline
The spread speed of interior liquid pressure Reeb, K are the volume modulus of liquid in pipeline, and ρ is the density of liquid in pipeline, and E is pipe
The elasticity modulus of the material in road, D are the diameter of pipeline, and e is the pipe thickness of pipeline, C1For the correction factor of pipeline.
With reference to first aspect with first three embodiment, in the 5th kind of embodiment, according in time difference and pipeline
After the spread speed of liquid pressure Reeb determines leakage point and pipeline head end/end distance, further include：Occurred according to flow curve
Flow volume change values after inflection point determine the leakage rate of leakage point.
Second aspect, the present invention provide a kind of pipeline leakage monitor, including：
Acquisition module, for acquiring the head end of pipeline and the flow and pressure of end；
Curve module, for being filtered respectively to collected flow with pressure, obtain for indicate flow with
The smooth flow curve of time change with for indicating the smooth pressure curve that pressure changes over time；
Time module, for judging pipeline head end and end when inflection point occurs in the flow curve of pipeline head end or end
Pressure curve whether have inflection point, if pipeline head end and the pressure curve of end have inflection point, record the pressure of pipeline head end
There is second time of the first time of inflection point when occurring inflection point with the pressure curve of pipe end in force curve, and when determining first
Between time difference between the second time；
Position computation module, for determining the spread speed of liquid pressure Reeb in pipeline, and according to time difference and pipeline
The spread speed of interior liquid pressure Reeb determines leakage point at a distance from pipeline head end/end.
In conjunction with second aspect, in the first embodiment, curve module is specifically used for：Using numerical analysis method to adopting
The flow collected is filtered, and obtains smooth flow curve.
In conjunction with second aspect, in the second embodiment, curve module is specifically used for：Utilize Mean Filtering Algorithm sum number
Word formula first-order low-pass wave algorithm is filtered collected pressure, obtains smooth pressure curve.
In conjunction with second aspect and first two embodiment, in the third embodiment, time module is for judging pressure
Before whether curve has inflection point, it is also used to：Using user datagram protocol UDP agreement transmission time synchronization signal, to pipeline
Head end and the clock time of end synchronize.
In conjunction with second aspect and first two embodiment, in the 4th kind of embodiment, position computation module is specifically used for：
According toDetermine the spread speed of liquid pressure Reeb in pipeline, wherein α is pipeline
The spread speed of interior liquid pressure Reeb, K are the volume modulus of liquid in pipeline, and ρ is the density of liquid in pipeline, and E is pipe
The elasticity modulus of the material in road, D are the diameter of pipeline, and e is the pipe thickness of pipeline, C1For the correction factor of pipeline.
In conjunction with second aspect and first two embodiment, in the 5th kind of embodiment, position computation module according to when
Between after the spread speed of liquid pressure Reeb determines leakage point and pipeline head end/end distance in difference and pipeline, be also used to：Root
Flow volume change values after occurring inflection point according to flow curve determine the leakage rate of leakage point.
Line leakage method and device of the invention, the first flow and pressure of the head end of acquisition pipeline and end,
Then collected flow is filtered respectively with pressure, obtains the smooth stream changed over time for indicating flow
It measures curve and is used to indicate the smooth pressure curve that pressure changes over time；Again when the flow curve of pipeline head end or end goes out
When existing inflection point, judge whether the pressure curve of pipeline head end and end has inflection point, if the pressure curve of pipeline head end and end
There is inflection point, then the pressure curve for recording pipeline head end the first time of inflection point occurs and turns with the pressure curve of pipe end
The second time when point, and determine the time difference between the second time at the first time, finally determine fluid pressure in pipeline
The spread speed of wave, and according to the spread speed of liquid pressure Reeb in time difference and pipeline determine leakage point and pipeline head end/
The distance of end.It has been achieved on the basis of obtaining pipeline flow variation, according to pipeline head end and terminal pressure curve
Inflection point judges that piping liquid pressure wave reaches the time difference of pipe ends, and further judges leakage point apart from pipeline head end or end
The distance at end, to realize the accurate positioning of pipe leakage point.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram for the line leakage method that the embodiment of the present invention one provides；
Fig. 2 is the schematic diagram for the leakage model for pipeline that the embodiment of the present invention one provides；
Fig. 3 is the structural schematic diagram of pipeline leakage monitor provided by Embodiment 2 of the present invention；
Fig. 4 is the structural schematic diagram for the pipeline leakage monitor that the embodiment of the present invention three provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the flow diagram for the line leakage method that the embodiment of the present invention one provides.As shown in Figure 1, this reality
Applying the line leakage method that example provides includes：
The flow and pressure of S101, the head end for acquiring pipeline and end.
Specifically, pipe-line can be divided into several segments, and every according to the pipe interface of pipe-line
Sensor is arranged in the head end of one segment pipe and end, to acquire the data on flows and pressure Value Data of head end and end.It is counted
It when according to acquisition, can be acquired using various sensors in the prior art, such as can be first using flowmeter acquisition pipeline
The fluid flow at end and end, and pressure sensor is utilized to acquire pressure Value Data.
S102, collected flow and pressure are filtered respectively, are obtained for indicating that flow changes over time
Smooth flow curve with for indicating the smooth pressure curve that pressure changes over time.
After collecting the head end of one section of conveyance conduit and the flow and pressure value of end, because of collected pressure and flow
It is all discrete value, it is therefore desirable to connect the discrete pressure and flow of different sampling stages, to be formed for characterizing pressure
What power or flow changed over time, more smooth curve is analyzed.
When acquiring the flow of pipeline, even if the very high dual rotor flowmeter of service precision, very stable in input flow rate
In the case of, although integrated flow measuring accuracy is very high, its rotation is still uneven, i.e., its instantaneous flow is still fluctuation,
And the actual characteristic of the flowmeter of every same type has difference.In this way when carrying out data acquisition, if sampling period mistake
Small, the fluctuation that will result in instantaneous flow is excessive, is unable to judge accurately the generation moment of leakage.
In order to guarantee that collected flow curve is more smooth, and there can be clearly inflection point in leakage point, it can be with
Collected flow is filtered using numerical analysis method, obtains smooth flow curve.Specifically, can pass through
Computer software numerical statistic simulation means calculate being averaged for current instantaneous flow according to mean value method to predict instantaneous flow
Value deviates the discrete flow value of current instantaneous flow average value too far to filter out, finally obtains a smooth flow curve.
When acquiring the pressure of pipeline head end and end, Mean Filtering Algorithm and digital first-order low-pass wave can use
Algorithm is filtered collected pressure, obtains smooth pressure curve.It is possible, firstly, to utilize Mean Filtering Algorithm pair
It is filtered in periodically variable pressure parameter, to obtain smooth pressure curve, and has more random disturbances for pressure
The case where, digital first-order low-pass wave algorithm can be taken.Specifically, digital first-order low-pass wave algorithm is：
Yn=a × Xn+(1-a)×Yn-1
In above formula：
XnFor this sampled value of pipeline pressure；
Yn-1For the filtering output value of pipeline pressure last time；
A is filter factor, and general provision A value is much smaller than 1；
YnPass through this filtered output valve for pipeline pressure.
After the calculating of digital first-order low-pass wave algorithm, the random disturbances in pressure can be eliminated, together
When can also subtract the hardware cost of RC low-pass filter.
After above-mentioned filter step, the collected pressure of pipeline head end and end can be filtered, with
Obtain more smooth pressure curve.
By above-mentioned steps, the flow curve and pressure curve of pipeline head end and end, above-mentioned song can be respectively obtained
Line can be by showing that equipment is shown, to allow monitoring personnel intuitively to know the flow and pressure condition of pipe ends.
S103, when there is inflection point in the flow curve of pipeline head end or end, judge that the pressure of pipeline head end and end is bent
Whether line has inflection point, if pipeline head end and the pressure curve of end have inflection point, the pressure curve for recording pipeline head end goes out
There is the second time when inflection point in the first time of existing inflection point and the pressure curve of pipe end, and determine first time and second
Time difference between time.
Because the step it needs to be determined that pressure curve inflection point time value, judge pressure curve whether have inflection point it
Before, need the clock time to pipeline head end and end to synchronize.Specifically, hardware mode can be used by carrying out time synchronization
Realize that time synchronization and software mode realize time synchronization two ways.
When realizing time synchronization using hardware mode, global positioning system (Global Positioning can be used
System, abbreviation GPS) all time it is all synchronous be Beijing time, in this way on the sensor of the head end of pipeline and end
It needs to be added GPS satellite positioning module, can achieve timing tracking accuracy using the GPS mould group positioning accuracy of serial ports mode and be less than
10ms, when using parallel port mode mould group, precision be can achieve within 1ms, the expansion of system be considered in industrial control system, mainly
Time synchronization is carried out using serial ports mode GPS.However, needing external antenna to capture at least 3 using the GPS time method of synchronization
GPS time synchronous satellite, therefore the architecture of entire monitoring system becomes complex, and at the same time needing to consider antenna electric
The factors such as the laying of cable and the lightning protection of antenna, increase the workload of system maintenance.
When carrying out time synchronization using software mode, time synchronization is carried out generally by way of time calibration in network, specifically
, it can use User Datagram Protocol (User Datagram Protocol, abbreviation UDP) transmission time synchronization signal, from
And pipeline head end is compared with the time of end and fiducial time respectively, with correction time difference.It is transmitted using udp protocol
The advantages of time synchronizing signal, is as follows：In the case where network is bad, after sending out time synchronization packet, confirmation packet can not receive, it can
Directly to confirm this failure, it is not necessary to carry out complicated confirmation re-transmission and udp protocol packet header itself is 8 bytes, occupy band
Width is relatively narrow.Therefore after having used udp protocol, the reliability of transmission time synchronization signal is higher, so that the time of whole system is steady
There has also been biggish raisings for fixed degree.
After carrying out time synchronization, it can obtain the time value that pressure curve inflection point occurs.Specifically, because in pressure wave
In the pipeline for moving larger or pressure smaller (0.2~0.3MPa), due to the suction wave very little of generation, it is transmitted to energy after detector
It is very low, be often submerged and differentiate it is unclear, so first have to judge flow curve, to screen whether have leakage
Situation occurs.Because the sum of input quantity of closed pipeline is equal to the sum of the output quantity of pipeline, when pipeline head end or end
When inflection point occurs in flow curve, it can determine that variation occurs in flow between the pipe ends, that is, has leakage.At this time, it may be necessary to
Judge whether the pressure curve of pipeline head end and end has inflection point, if pipeline head end and the pressure curve of end have inflection point,
There is the first time of inflection point and with the pressure curve of the pipe end inflection point occurs in the pressure curve for then recording the pipeline head end
Second time.
Specifically, when there is leakage situation between pipeline head end and end, because the pressure of leakage point can reduce suddenly,
The negative pressure wave generated simultaneously will be propagated along pipeline to both ends, and the pressure value for causing pipeline head end and pipe end to be monitored
Can occur centainly declining suddenly, and the pressure curve of the pressure curve of pipeline head end and pipe end can also drop suddenly therewith
It is low, and transfer to be rendered as one section of more precipitous decline state from horizontality.Because of the instant exposure of negative pressure wave in pipeline
Speed is the function of the magnitudes such as dielectric viscosity, density, pipe diameter, elasticity modulus.Thus with the difference of leak position, pipeline two
End monitors that the time of pressure decline is also different.At this point, the pressure curve of pipeline head end and pipe end is in the case where horizontality arrives
Time at the inflection point of drop state be pipe ends monitor pressure decline time, it is recorded as respectively at the first time and
Second time, and determine the time difference between the second time at the first time.
Fig. 2 is the schematic diagram for the leakage model for pipeline that the embodiment of the present invention one provides.With pipe leakage mould shown in Fig. 2
For type, head end pressure-measuring-point p is respectively set at the upstream and downstream both ends of pipeline1And terminal pressure measuring point p2, head end pressure-measuring-point
p1Collected pressure data form the pressure curve of pipeline head end, terminal pressure measuring point p2Collected pressure data is formed
The pressure curve of line end.When leaking at the X of pipeline, the suction wave for leaking generation is distinguished with certain speed alpha
It is propagated to the head end of pipeline and end, in t and t+ τ0Moment is by sensor p1、p2It detects.Therefore, pipeline head end pressure curve
Inflection point at time be t, and the time at pipe end pressure curve inflection point be t+ τ0。
S104, the spread speed for determining liquid pressure Reeb in pipeline, and according to liquid pressure Reeb in time difference and pipeline
Spread speed determine leakage point at a distance from pipeline head end/end.
Or by taking the leakage model for pipeline in Fig. 2 as an example, if the length between pipeline head end and end is L, X is in pipeline
Distance of the leakage point apart from pipeline head end, thus distance of the leakage point apart from pipe end is L-X.
Following relationship can be obtained：
It is as follows that ranging formula is solved according to above formula：
Wherein, X is the distance between leakage point and pipeline head end；
L is the distance between pipeline head end and pipe end (pipe range)；
α is the spread speed of liquid pressure Reeb in pipeline；
τ0The time difference of inflection point is generated for pipeline head end and terminal pressure curve.
Therefore, liquid pressure Reeb in pipeline head end and the time difference and pipeline of the pressure curve inflection point of end can be passed through
Spread speed, calculate leakage point apart from pipeline head end or apart from the distance of pipe end.
Specifically, the spread speed of liquid pressure Reeb can be according to the situation of liquid in pipeline and pipeline itself in pipeline
Geomery is determined, it is thus determined that can specifically determine according to the following formula in pipeline when the spread speed of liquid pressure Reeb
The spread speed of liquid pressure Reeb in pipeline：
Wherein,
α is the spread speed of liquid pressure Reeb in pipeline；
K is the volume modulus of liquid in pipeline；
ρ is the density of liquid in pipeline；
E is the elasticity modulus of the material of pipeline；
D is the diameter of pipeline；
E is the pipe thickness of pipeline；
C1For the correction factor of pipeline.
It is obtained in pipeline after the spread speed of liquid pressure Reeb according to above formula, i.e., determines and leak in combination with above-mentioned time difference
Point is at a distance from pipeline head end/end.
Optionally, the spread speed of liquid pressure Reeb determines leakage point and acquisition pipeline according to time difference and pipeline
After the distance of head end/end, the flow volume change values after can also occurring inflection point according to flow curve determine the leakage rate of leakage point.
The flow curve after the inflection point time can specifically be integrated, to obtain the flow volume change values after inflection point.
In the present embodiment, the head end of pipeline and the flow and pressure of end are acquired first, then respectively to collected stream
Amount is filtered with pressure, is obtained for indicating smooth flow curve that flow changes over time and being used to indicate pressure
The smooth pressure curve changed over time；Again when inflection point occurs in the flow curve of pipeline head end or end, pipeline head is judged
Whether the pressure curve of end and end has inflection point, if pipeline head end and the pressure curve of end have inflection point, records pipeline
There is second time of the first time of inflection point when occurring inflection point with the pressure curve of pipe end in the pressure curve of head end, and really
The fixed time difference between the second time at the first time, finally determines the spread speed of liquid pressure Reeb in pipeline, and according to
The spread speed of liquid pressure Reeb determines leakage point at a distance from pipeline head end/end in time difference and pipeline.It is achieved
On the basis of obtaining pipeline flow variation, piping liquid pressure judged according to pipeline head end and terminal pressure point of inflexion on a curve
Wave reaches the time difference of pipe ends, and further judges distance of the leakage point apart from pipeline head end or end, to realize
The accurate positioning of pipe leakage point.
Fig. 3 is the structural schematic diagram of pipeline leakage monitor provided by Embodiment 2 of the present invention.As shown in figure 3, this reality
Applying the pipeline leakage monitor 31 that example provides includes：
Acquisition module 301, for acquiring the head end of pipeline and the flow and pressure of end；
Curve module 302 is obtained for being filtered respectively to collected flow with pressure for indicating flow
The smooth flow curve that changes over time with for indicating the smooth pressure curve that pressure changes over time；
Time module 303, for judging pipeline head end and end when inflection point occurs in the flow curve of pipeline head end or end
Whether the pressure curve at end has inflection point, if pipeline head end and the pressure curve of end have inflection point, records pipeline head end
There is second time of the first time of inflection point when occurring inflection point with the pressure curve of pipe end in pressure curve, and determines first
Time difference between time and the second time；
Position computation module 304, for determining the spread speed of liquid pressure Reeb in pipeline, and according to time difference and pipe
The spread speed of liquid pressure Reeb determines leakage point at a distance from pipeline head end/end in road.
Specifically, curve module 302 is specifically used for being filtered collected flow using numerical analysis method,
Obtain smooth flow curve.
Specifically, curve module 302 is specifically also used to utilize Mean Filtering Algorithm and digital first-order low-pass wave algorithm
Collected pressure is filtered, smooth pressure curve is obtained.
Specifically, time module 303 is for before judging whether pressure curve has inflection point, being also used to utilize user data package
Agreement udp protocol transmission time synchronization signal, is synchronized with the clock time to pipeline head end and end.
Specifically, position computation module 304 is specifically used for：According to
Determine the spread speed of liquid pressure Reeb in pipeline, wherein α is liquid in pipeline
Body pressure-wave propagation speed, K are the volume modulus of liquid in pipeline, and ρ is the density of liquid in pipeline, and E is pipeline
The elasticity modulus of material, D are the diameter of pipeline, and e is the pipe thickness of pipeline, C1For the correction factor of pipeline.
Specifically, the spread speed of the liquid pressure Reeb according to time difference and pipeline of position computation module 304 determines
After leakage point and pipeline head end/end distance, the flow volume change values determination after being also used to occur according to flow curve inflection point is let out
The leakage rate of leak source.
Pipeline leakage monitor provided by the present embodiment can be executed such as line leakage in previous embodiment one
The specific steps of method, details are not described herein again.
In the present embodiment, the acquisition module of pipeline leakage monitor be used to acquire pipeline head end and end flow with
Pressure；Curve module is for being respectively filtered collected flow with pressure, obtaining smooth flow curve and putting down
Sliding pressure curve；Time module be used for when there is inflection point in the flow curve of pipeline head end or end, judge pipeline head end and
Whether the pressure curve of end has inflection point, if pipeline head end and the pressure curve of end have inflection point, records pipeline head end
Pressure curve there is second time of the first time of inflection point when occurring inflection point with the pressure curve of pipe end, and determine the
Time difference between one time and the second time；Position computation module is used to determine the propagation speed of liquid pressure Reeb in pipeline
Degree, and determine leakage point at a distance from pipeline head end/end according to the spread speed of liquid pressure Reeb in time difference and pipeline.
It has been achieved on the basis of obtaining pipeline flow variation, pipeline is judged according to pipeline head end and terminal pressure point of inflexion on a curve
Liquid pressure Reeb reaches the time difference of pipe ends, and further judges distance of the leakage point apart from pipeline head end or end, from
And realize the accurate positioning of pipe leakage point.
Fig. 4 is the structural schematic diagram for the pipeline leakage monitor that the embodiment of the present invention three provides.As shown in figure 4, this reality
Applying the pipeline leakage monitor 41 that example provides includes：
Sensor 401, for acquiring the head end of pipeline and the flow and pressure of end；
Processor 402, for being filtered respectively to collected flow with pressure, obtain for indicate flow with
The smooth flow curve of time change with for indicating the smooth pressure curve that pressure is pleaded at any time；
When there is inflection point in the flow curve of pipeline head end or end, judge pipeline head end and end pressure curve whether
There is inflection point, if pipeline head end and the pressure curve of end have inflection point, inflection point occurs in the pressure curve for recording pipeline head end
The second time when there is inflection point of first time and the pressure curve of pipe end, and determine at the first time and the second time it
Between time difference；
Determine the spread speed of liquid pressure Reeb in pipeline, and according to the propagation of liquid pressure Reeb in time difference and pipeline
Speed determines leakage point at a distance from pipeline head end/end.
Specifically, processor 402 is specifically used for being filtered collected flow using numerical analysis method, obtain
To smooth flow curve.
Specifically, processor 402 is specifically also used to utilize Mean Filtering Algorithm and digital first-order low-pass wave algorithm pair
Collected pressure is filtered, and obtains smooth pressure curve.
Specifically, being also used to utilize user data package before processor 402 is also used to judge whether pressure curve has inflection point
Agreement udp protocol transmission time synchronization signal, is synchronized with the clock time to pipeline head end and end.
Specifically, processor 402 is also used to basis
Determine the spread speed of liquid pressure Reeb in pipeline, wherein α is liquid in pipeline
Body pressure-wave propagation speed, K are the volume modulus of liquid in pipeline, and ρ is the density of liquid in pipeline, and E is pipeline
The elasticity modulus of material, D are the diameter of pipeline, and e is the pipe thickness of pipeline, C1For the correction factor of pipeline.
Specifically, the spread speed of liquid pressure Reeb according to time difference and pipeline of processor 402 determines leakage point
After the distance of pipeline head end/end, the flow volume change values after being also used to occur according to flow curve inflection point determine leakage point
Leakage rate.
In the present embodiment, sensor in pipeline leakage monitor be used to acquire pipeline head end and end flow with
Pressure；Processor for being filtered respectively to collected flow with pressure, obtain smooth flow curve with smoothly
Pressure curve；When inflection point occurs in the flow curve of pipeline head end or end, the pressure curve of pipeline head end and end is judged
Whether inflection point is had, if pipeline head end and the pressure curve of end have inflection point, the pressure curve for recording pipeline head end occurs
The first time of inflection point occurs the second time when inflection point with the pressure curve of pipe end, and when determining at the first time with second
Between between time difference；Determine the spread speed of liquid pressure Reeb in pipeline, and according to liquid pressure in time difference and pipeline
The spread speed of Reeb determines leakage point at a distance from pipeline head end/end.It has been achieved and has obtained pipeline flow variation
On the basis of, judge that pipeline pressure wave reaches the time difference of pipe ends according to pipeline head end and terminal pressure point of inflexion on a curve, and
Distance of the leakage point apart from pipeline head end or end is further judged, to realize the accurate positioning of pipe leakage point.
Those of ordinary skill in the art will appreciate that：Realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes：ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that：Its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of line leakage method, which is characterized in that including：
Acquire the head end of pipeline and the flow and pressure of end；
The collected flow is filtered with the pressure respectively, is obtained for indicating that the flow becomes at any time
The smooth flow curve changed with for indicating the smooth pressure curve that the pressure changes over time；
When inflection point occurs in the flow curve of the pipeline head end or end, the pressure curve of the pipeline head end and end is judged
Whether there is inflection point, if the pipeline head end and the pressure curve of end have inflection point, records the pressure of the pipeline head end
There is the second time when inflection point in the pressure curve that the first time of inflection point and the pipe end occurs in curve, and described in determining
Time difference between second time at the first time；
Determine the spread speed of liquid pressure Reeb in the pipeline, and according to fluid pressure in the time difference and the pipeline
The spread speed of wave determines leakage point at a distance from the pipeline head end or leak point and the pipe end；
It is described that the collected flow is filtered, it obtains smooth flow curve and specifically includes：
The collected flow is filtered using numerical analysis method, obtains smooth flow curve；
It is described that the collected pressure is filtered, it obtains smooth pressure curve and specifically includes：
The collected pressure is filtered using Mean Filtering Algorithm and digital first-order low-pass wave algorithm, is obtained
To smooth pressure curve.
2. line leakage method according to claim 1, which is characterized in that described to judge whether pressure curve turns
Before point, further include：
Using user datagram protocol UDP agreement transmission time synchronization signal, when with clock to the pipeline head end and end
Between synchronize.
3. line leakage method according to claim 1, which is characterized in that liquid pressure in the determination pipeline
The spread speed of Reeb specifically includes：
According toDetermine the spread speed of liquid pressure Reeb in the pipeline, wherein α is described
The spread speed of liquid pressure Reeb in pipeline, K are the volume modulus of liquid in the pipeline, and ρ is liquid in the pipeline
Density, E be the pipeline material elasticity modulus, D be the pipeline diameter, e be the pipeline pipe thickness, C1
For the correction factor of the pipeline.
4. line leakage method according to claim 1, which is characterized in that described according to the time difference and pipe
After the spread speed of liquid pressure Reeb determines leakage point and pipeline head end/end distance in road, further include：
Flow volume change values after occurring inflection point according to the flow curve determine the leakage rate of the leakage point.
5. a kind of pipeline leakage monitor, which is characterized in that including：
Acquisition module, for acquiring the head end of pipeline and the flow and pressure of end；
Curve module is obtained for being filtered respectively to the collected flow with the pressure for indicating
State the smooth flow curve and be used to indicate the smooth pressure curve that the pressure changes over time that flow changes over time；
Time module, for when inflection point occurs in the flow curve of the pipeline head end or end, judge the pipeline head end and
Whether the pressure curve of end has inflection point, if the pipeline head end and the pressure curve of end have an inflection point, described in record
There is second when inflection point in the pressure curve that the first time of inflection point and the pipe end occurs in the pressure curve of pipeline head end
Time, and determine the time difference between the first time and second time；
Position computation module, for determining the spread speed of liquid pressure Reeb in the pipeline, and according to the time difference and
The spread speed of liquid pressure Reeb determines leakage point at a distance from the pipeline head end/end in the pipeline；
The curve module is specifically used for：
The collected flow is filtered using numerical analysis method, obtains smooth flow curve；
The curve module is specifically used for：
The collected pressure is filtered using Mean Filtering Algorithm and digital first-order low-pass wave algorithm, is obtained
To smooth pressure curve.
6. pipeline leakage monitor according to claim 5, which is characterized in that the time module is for judging pressure
Before whether curve has inflection point, it is also used to：
Using user datagram protocol UDP agreement transmission time synchronization signal, when with clock to the pipeline head end and end
Between synchronize.
7. pipeline leakage monitor according to claim 5, which is characterized in that the position computation module is specifically used
In：
According toDetermine the spread speed of liquid pressure Reeb in the pipeline, wherein α is described
The spread speed of liquid pressure Reeb in pipeline, K are the volume modulus of liquid in the pipeline, and ρ is liquid in the pipeline
Density, E be the pipeline material elasticity modulus, D be the pipeline diameter, e be the pipeline pipe thickness, C1
For the correction factor of the pipeline.
8. pipeline leakage monitor according to claim 5, which is characterized in that the position computation module is according to institute
State liquid pressure Reeb in time difference and pipeline spread speed determine leakage point and pipeline head end/end distance after,
It is also used to：
Flow volume change values after occurring inflection point according to the flow curve determine the leakage rate of the leakage point.
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| CN106499957B (en) * | 2016-12-28 | 2018-11-02 | 沈阳工业大学 | A kind of pressure wave signal generator and in-pipeline detector real-time tracking localization method |
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| 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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| 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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