CN111059476B - Pipeline leakage positioning method and system - Google Patents
Pipeline leakage positioning method and system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention relates to a pipeline leakage positioning method and a system thereof, wherein the method comprises the steps of arranging two detection devices for collecting pipeline signals on a pipeline at a certain distance; synchronizing the internal time of the two detection devices to the Beidou satellite reference time; matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal; matching the signal detected by the second detection device in the second internal time with the second internal time to form a pairing time sequence signal; and judging whether the pairing time series signal can be paired with the suspected water leakage time series signal, if not, judging the suspected water leakage signal as an error signal, not processing, and if so, positioning the water leakage position by using the time difference between the suspected water leakage time series signal and the pairing time series signal. The invention reduces the false alarm probability of the water leakage signal, improves the reliability of the system and solves the problem of high false alarm probability of the water leakage signal in the prior art.
Description
Technical Field
The invention relates to the technical field of pipeline leakage positioning, in particular to a pipeline leakage positioning method and a pipeline leakage positioning system.
Background
The water supply pipeline plays an extremely critical role in long-distance water resource transportation, but most pipelines are easily damaged when being laid in the severe natural environments such as the field or the underground. Once the water supply pipeline is damaged and leaks, the pipeline needs to be repaired in time so as to avoid additional economic loss. Therefore, the rapid detection and positioning of the pipeline leakage have great application value, and scheme guidance can be provided for pipeline maintenance.
At present, most of signal positioning methods for pipeline leakage in a water supply network extract information related to leakage signals from mixed signals acquired by pipelines by adopting a signal processing means, and realize positioning of leakage points according to the strength degree, frequency spectrum diffusion and other characteristics of the signals, but the accuracy of the positioning method is difficult to guarantee.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a pipeline leakage positioning method and a pipeline leakage positioning system, which can solve the problem that the precision of the existing positioning method is difficult to guarantee.
The technical scheme for realizing the purpose is as follows:
the invention provides a pipeline leakage positioning method, which comprises the following steps:
providing a first detection device and a second detection device for collecting pipeline signals, and arranging the first detection device and the second detection device on a pipeline at a certain distance;
opening corresponding Beidou signal receiving modules in the first detection device and the second detection device, and synchronizing the internal time of the first detection device and the internal time of the second detection device to the Beidou satellite reference time;
setting the time when the first detection device detects the suspected water leakage signal as a first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal;
selecting corresponding internal time in second detection equipment according to the first internal time to form second internal time, and matching a signal detected by the second detection equipment in the second internal time with the second internal time to form a matched time sequence signal;
judging whether the pairing time series signal and the suspected water leakage time series signal can be paired or not,
when the matching is not available, the suspected water leakage signal is judged to be an error signal and is not processed,
when the matching is available, the water leakage position is positioned by using the time difference between the suspected water leakage time sequence signal and the matching time sequence signal.
The invention has the advantages that on one hand, the Beidou signal receiving modules are arranged in the first detection device and the second detection device, the precision and consistency of the internal time of the two detection devices are improved by utilizing the characteristic of high-precision time service of the Beidou satellite, so that the time difference is more accurate, the positioning precision of the water leakage position is improved, on the other hand, the second detection device is utilized to pair the suspected water leakage signals of the first detection device, the generation of error signals is prevented, and the false alarm probability is reduced.
The pipeline leakage positioning method is further improved in that an interval time is set;
after the internal time of the first detection device and the internal time of the second detection device are synchronized to the Beidou satellite reference time, the Beidou signal receiving modules of the first detection device and the second detection device are closed, the Beidou signal receiving modules of the first detection device and the second detection device are opened again at intervals every time, and the internal time of the first detection device and the internal time of the second detection device are synchronized to the Beidou reference time again and then closed.
The pipeline leakage positioning method is further improved by providing a solar panel, and correspondingly installing the solar panel on the first detection device and the second detection device so as to supply power to the first detection device and the second detection device.
The present invention further improves the method for positioning leakage of pipeline, wherein the step of judging whether the pairing time series signal and the suspected water leakage time series signal can be paired comprises:
setting a limit value;
fourier transform is carried out on the suspected water leakage time series signal to obtain a frequency spectrum series signal X1，
Fourier transform is carried out on the paired time series signals to obtain frequency spectrum series signal X2，
Using formulas
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the frequency spectrum sequence signal, and N is the number of the number;
judging the size of the similarity and the limit value,
if the similarity is larger than or equal to the limit value, the pairing is judged to be possible,
and if the similarity is smaller than the limit value, judging that the matching cannot be performed.
The further improvement of the pipe leakage positioning method of the invention is that the positioning of the water leakage position by using the time difference between the suspected water leakage time series signal and the paired time series signal comprises the following steps:
using formulas
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) is two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
The invention also provides a pipe leakage positioning system, comprising:
the first detection device and the second detection device are arranged on the pipeline at a certain distance;
the Beidou signal receiving modules are correspondingly arranged in the first detection device and the second detection device and are used for synchronizing the internal time of the first detection device and the internal time of the second detection device to the Beidou satellite reference time;
the matching module is connected with the Beidou signal receiving module and used for setting the time when the first detection equipment detects the suspected water leakage signal as first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal;
the selecting module is connected with the Beidou signal receiving module and used for selecting corresponding internal time in second detection equipment according to the first internal time to form second internal time and matching a signal detected by the second detection equipment in the second internal time with the second internal time to form a matched time sequence signal;
the matching module is connected with the matching module and the selecting module and used for judging whether the matching time series signal and the suspected water leakage time series signal can be matched or not, and when the matching cannot be matched, the suspected water leakage signal is judged to be an error signal and is not processed;
and the positioning module is connected with the pairing module and used for positioning the water leakage position by utilizing the time difference between the suspected water leakage time sequence signal and the pairing time sequence signal when pairing is available.
The pipeline leakage positioning system is further improved in that the pipeline leakage positioning system further comprises:
connect in big dipper signal reception module's control module for set for an interval time, after synchronizing the internal time homogeneous phase of first check out test set and second check out test set to big dipper satellite reference time, close the big dipper signal reception module of first check out test set and second check out test set, and open the big dipper signal reception module of first check out test set and second check out test set once more at every interval time, close after synchronizing the time homogeneous phase in first check out test set and the second check out test set to big dipper reference time once more.
The pipeline leakage positioning system is further improved in that solar panels for supplying power are correspondingly installed on the first detection device and the second detection device.
The pipeline leakage positioning system is further improved in that the pipeline leakage positioning system further comprises:
the pairing module comprises a limit value setting unit for setting a limit value;
the pairing module further comprises a similarity calculation unit for carrying out Fourier transform on the suspected water leakage time series signal to obtain a frequency spectrum sequence signal X1，
Fourier transform is carried out on the paired time series signals to obtain frequency spectrum series signal X2，
Using formulas
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the frequency spectrum sequence signal, and N is the number of the number;
the matching module also comprises a judging unit connected with the limit value setting unit and the similarity calculating unit and used for judging the similarity and the size of the limit value,
when the similarity is larger than or equal to the limit value, determining that pairing is possible,
and when the similarity is smaller than the limit value, judging that the matching cannot be performed.
In a further development of the inventive pipe leakage location system, the location module utilizes a formula
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) is two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
Drawings
FIG. 1 is a flow chart of a method for locating pipeline leaks in accordance with the present invention.
Fig. 2 is a schematic structural diagram of the pipe leakage locating system of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a pipeline leakage positioning method, which has the characteristics of high positioning accuracy, low false alarm probability and the like, and solves the problem that the accuracy of the existing positioning method is difficult to guarantee. The method for locating pipeline leakage according to the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the pipe leakage locating method of the present invention includes:
step S1 is executed: a first detection device 21 and a second detection device 22 are provided for collecting signals of the pipeline 10, the first detection device 21 and the second detection device 22 being arranged on the pipeline 10 at a distance.
Further, a solar panel 30 is provided, and the solar panel 30 is correspondingly mounted on the first detection device 21 and the second detection device 22 so as to supply power to the first detection device 21 and the second detection device 22. Step S2 is then performed.
Step S2 is executed: and opening corresponding Beidou signal receiving modules in the first detection device 21 and the second detection device 22, and synchronizing the internal time of the first detection device 21 and the internal time of the second detection device 22 to the Beidou satellite reference time.
Specifically, an interval time is set, after the internal time of the first detection device 21 and the internal time of the second detection device 22 are synchronized to the Beidou satellite reference time, the Beidou signal receiving modules of the first detection device 21 and the second detection device 22 are closed, then the Beidou signal receiving modules of the first detection device 21 and the second detection device 22 are opened again at every interval time, and the internal time of the first detection device 21 and the second detection device 22 is synchronized to the Beidou reference time again and then closed. Thereby realizing that the internal time of the first detecting device 21 and the second detecting device 22 automatically keeps consistent. Step S3 is then performed.
Step S3 is executed: and setting the time when the first detection device 21 detects the suspected water leakage signal as a first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal. Step S4 is then performed.
Step S4 is executed: and selecting corresponding internal time in the second detection device 22 according to the first internal time to form second internal time, and matching a signal detected by the second detection device 22 in the second internal time with the second internal time to form a pairing time sequence signal. Step S5 is then performed.
Step S5 is executed: judging whether the pairing time series signal and the suspected water leakage time series signal can be paired or not; when the matching is not available, the suspected water leakage signal is judged to be an error signal, and the processing is not carried out; when pairing is possible, step S6 is executed.
Specifically, a limit value is set;
fourier transform is carried out on the suspected water leakage time series signal to obtain a frequency spectrum series signal X1，
Fourier transform is carried out on the paired time series signals to obtain frequency spectrum series signal X2，
Using formulas
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the frequency spectrum sequence signal, and N is the number of the number;
judging the size of the similarity and the limit value;
if the similarity is greater than or equal to the limit value, determining that pairing is possible, and executing step S6;
and if the similarity is smaller than the limit value, judging that the matching cannot be performed and not processing.
Step S6 is executed: and positioning the water leakage position by using the time difference between the suspected water leakage time sequence signal and the pairing time sequence signal.
Using formulas
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) is two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
The pipe leakage locating system of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the pipe leakage locator system of the present invention includes:
a first detecting device 21 and a second detecting device 22 for collecting signals of the pipeline 10, the first detecting device 21 and the second detecting device 22 being arranged on the pipeline 10 at a distance. The first detection device 21 and the second detection device 22 are correspondingly provided with a solar panel 30 for supplying power.
The Beidou signal receiving modules correspondingly arranged in the first detection device 21 and the second detection device 22 are used for synchronizing the internal time of the first detection device 21 and the internal time of the second detection device 22 to the Beidou satellite reference time.
The positioning system of the present invention further comprises: connect in big dipper signal receiver module's control module for set for an interval time, after the internal time with first check out test set 21 and second check out test set 22 is all synchronous to big dipper satellite reference time, close first check out test set 21 and second check out test set 22's big dipper signal receiver module, then every interval time opens first check out test set 21 and second check out test set 22's big dipper signal receiver module once more afterwards, and close after the time with in first check out test set 21 and the second check out test set 22 is all synchronous to big dipper reference time again.
And the matching module is connected with the Beidou signal receiving module and is used for setting the time when the first detection equipment 21 detects the suspected water leakage signal as first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal.
And the selecting module is connected with the Beidou signal receiving module and used for selecting corresponding internal time in the second detection equipment 22 according to the first internal time to form second internal time and matching the signal detected by the second detection equipment 22 in the second internal time with the second internal time to form a matched time sequence signal.
The matching module is connected with the matching module and the selecting module and used for judging whether the matching time series signal and the suspected water leakage time series signal can be matched or not, and when the matching cannot be matched, the suspected water leakage signal is judged to be an error signal and is not processed;
specifically, the pairing module comprises a limit value setting unit for setting a limit value;
the pairing module further comprises a similarity calculation unit for carrying out Fourier transform on the suspected water leakage time series signal to obtain a frequency spectrum sequence signal X1Performing Fourier transform on the paired time series signals to obtain a frequency spectrum series signal X2And using a formula
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the spectrum sequence signal, and N is the number of the numbers.
The matching module further comprises a judging unit connected with the limit setting unit and the similarity calculating unit and used for judging the similarity and the limit, when the similarity is smaller than the limit, the matching is judged to be impossible and not processed, and when the similarity is larger than or equal to the limit, the matching is judged to be possible.
And the positioning module is connected with the pairing module and used for receiving the signals of the pairing module, and when pairing can be carried out, the water leakage position is positioned by utilizing the time difference between the suspected water leakage time sequence signal and the pairing time sequence signal.
In particular, the location module utilizes a formula
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) is two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
The pipeline leakage positioning method and the system thereof have the beneficial effects that:
the built-in big dipper signal reception module of first check out test set and second check out test set is adopted, utilizes the characteristics of big dipper satellite high accuracy time service, promotes the precision and the uniformity of two check out test set internal time for the time difference is more accurate, thereby promotes the position positioning accuracy that leaks. In the prior art, in order to synchronize the internal time of two devices, a network is generally required to be arranged between the devices, and the method is quite complicated.
The suspected water leakage signals of the first detection equipment are paired by the second detection equipment, so that the generation of error signals is prevented, and the false alarm probability is reduced.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (4)
1. A method of locating a leak in a pipeline, comprising the steps of:
providing a first detection device and a second detection device for collecting pipeline signals, and arranging the first detection device and the second detection device on a pipeline at a certain distance;
opening corresponding Beidou signal receiving modules in the first detection device and the second detection device, and synchronizing the internal time of the first detection device and the internal time of the second detection device to the Beidou satellite reference time;
setting the time when the first detection device detects the suspected water leakage signal as a first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal;
selecting corresponding internal time in second detection equipment according to the first internal time to form second internal time, and matching a signal detected by the second detection equipment in the second internal time with the second internal time to form a matched time sequence signal;
judging whether the pairing time series signal and the suspected water leakage time series signal can be paired or not,
when the matching is not available, the suspected water leakage signal is judged to be an error signal and is not processed,
when the matching is available, the water leakage position is positioned by using the time difference between the suspected water leakage time sequence signal and the matching time sequence signal;
further comprising:
setting an interval time;
after the internal time of the first detection device and the internal time of the second detection device are synchronized to the Beidou satellite reference time, the Beidou signal receiving modules of the first detection device and the second detection device are closed, the Beidou signal receiving modules of the first detection device and the second detection device are opened again at intervals each time, and the internal time of the first detection device and the internal time of the second detection device are synchronized to the Beidou reference time again and then closed;
judging whether the pairing time series signal and the suspected water leakage time series signal can be paired comprises the following steps:
setting a limit value;
fourier transform is carried out on the suspected water leakage time series signal to obtain a frequency spectrum series signal X1，
Fourier transform is carried out on the paired time series signals to obtain frequency spectrum series signal X2，
Using formulas
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the frequency spectrum sequence signal, and N is the number of the number;
judging the size of the similarity and the limit value,
if the similarity is larger than or equal to the limit value, the pairing is judged to be possible,
if the similarity is smaller than the limit value, judging that pairing cannot be performed;
the positioning the water leakage position by using the suspected water leakage time sequence signal and the time difference of the paired time sequence signals comprises the following steps:
using formulas
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) is two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
2. The method of locating a pipe leak of claim 1, further comprising:
the method comprises the steps of providing a solar cell panel, and correspondingly installing the solar cell panel on first detection equipment and second detection equipment so as to supply power to the first detection equipment and the second detection equipment.
3. A system for locating a leak in a pipe, comprising:
the first detection device and the second detection device are arranged on the pipeline at a certain distance;
the Beidou signal receiving modules are correspondingly arranged in the first detection device and the second detection device and are used for synchronizing the internal time of the first detection device and the internal time of the second detection device to the Beidou satellite reference time;
the matching module is connected with the Beidou signal receiving module and used for setting the time when the first detection equipment detects the suspected water leakage signal as first internal time, matching the suspected water leakage signal with the first internal time and forming a suspected water leakage time sequence signal;
the selecting module is connected with the Beidou signal receiving module and used for selecting corresponding internal time in second detection equipment according to the first internal time to form second internal time and matching a signal detected by the second detection equipment in the second internal time with the second internal time to form a matched time sequence signal;
the matching module is connected with the matching module and the selecting module and used for judging whether the matching time series signal and the suspected water leakage time series signal can be matched or not, and when the matching cannot be matched, the suspected water leakage signal is judged to be an error signal and is not processed;
the positioning module is connected with the pairing module and used for positioning the water leakage position by utilizing the time difference between the suspected water leakage time sequence signal and the pairing time sequence signal when pairing can be carried out;
further comprising:
the control module is connected with the Beidou signal receiving module and used for setting an interval time, after the internal time of the first detection device and the internal time of the second detection device are synchronized to the Beidou satellite reference time, the Beidou signal receiving modules of the first detection device and the second detection device are closed, the Beidou signal receiving modules of the first detection device and the second detection device are opened again at each interval time, and the time in the first detection device and the time in the second detection device are synchronized to the Beidou reference time again and then are closed;
further comprising:
the pairing module comprises a limit value setting unit for setting a limit value;
the pairing module further comprises a similarity calculation unit for carrying out Fourier transform on the suspected water leakage time series signal to obtain a frequency spectrum sequence signal X1，
Fourier transform is carried out on the paired time series signals to obtain frequency spectrum series signal X2，
Using formulas
Calculating the similarity D (X) between the pairing time series signal and the suspected water leakage time series signal1,X2) Wherein k is the number of the spectrum sequence signal,n is the number of serial numbers;
the matching module also comprises a judging unit connected with the limit value setting unit and the similarity calculating unit and used for judging the similarity and the size of the limit value,
when the similarity is larger than or equal to the limit value, determining that pairing is possible,
when the similarity is smaller than the limit value, judging that pairing cannot be performed;
the positioning module utilizes a formula
Calculating the suspected water leakage time sequence signal x1And the pairing time series signal x2Wherein γ (k) refers to two sequences (x)1、x2) T is the moment when the first detection device detects that the water leakage signal is suspected, k is the serial number of the time series signal, N is the serial number,
is a sequence x1The average value of (a) of (b),
is a sequence x2Is measured.
4. The pipe leakage locator system of claim 3, wherein solar panels for supplying power are correspondingly mounted on the first detection device and the second detection device.
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