CN104100840A - Pipeline blockage monitoring system and detection method thereof for blockage signals under strong interference - Google Patents

Abstract

The invention relates to a pipeline blockage monitoring system and a detection method thereof for blockage signals under strong interference. The system comprises a low-frequency sound wave emitting device arranged at the original/final station of a pipeline, a sensor array arranged at the original/final station of the pipeline, a data acquiring and preprocessing device with one input end connected to the sensor array, a blockage monitoring and positioning device connected to the output end of the data acquiring and preprocessing device and a monitoring terminal connected to the output end of the blockage monitoring and positioning device. By measuring the time delay between the emitted sound waves and reflected sound waves and combining the sound velocity in the pipeline, the position of a pipeline blockage point can be calculated accurately, and the system has the advantages of high positioning accuracy, high anti-interference ability, pipeline damage elimination, low false alarm rate, low missing rate, high fault tolerance and the like; when the blocking area is small or the interference is strong, the detecting and positioning abilities are improved greatly as compared with those of the single sensor method, and the system can be widely applied to pipeline monitoring in various fields.

Description

Monitoring pipeline blocking system and under strong jamming the detecting method of jam signal

Technical field

The present invention relates to a kind of monitoring pipeline blocking system and method, be specifically related to a kind of monitoring pipeline blocking system based on sound wave sensor array and the detecting method of jam signal under strong interference environment.

Background technique

Along with the fast development of national economy, pipeline transport is just being brought into play more and more important effect in national economy, national defense industry in producing.In pipeline transport process, often there will be the situation of line clogging, this not only can cause serious economic loss, environmental pollution, even can bring personal injury.Existing main flow line clogging monitoring method has barotropic wave method, pipeline analog simulation method and sound wave method, and above-mentioned three kinds of performance comparison of stopping up monitoring method are as shown in table 1:

Table 1

Monitoring method	Security	Sensitivity	Positioning precision	Response time
					Barotropic wave method	Poor	Poor	Generally	Hurry up
Pipeline analog simulation method	High	Good	Poor	Slowly
					Sound wave method	High	Better	High	Hurry up

As seen from the above table, sound wave method has that detection sensitivity is high, positioning precision advantages of higher, has good application prospect.But when line clogging area is less, and exist during compared with strong jamming, how from strong interference environment, extracting faint obstruction sound wave signals is the difficult point of sound wave method.

Summary of the invention

For the problems referred to above, the object of this invention is to provide a kind of monitoring pipeline blocking system and the detecting method of jam signal under strong interference environment.

For achieving the above object, the present invention takes following technological scheme: a kind of monitoring pipeline blocking system, it is characterized in that, this system comprises: one is arranged on the bass wave transmitting device of pipeline initial station/terminal, one is arranged on the sensor array of pipeline initial station/terminal, data capture and pre-treater that one input end is connected with described sensor array, the one GPS reception unit being connected with another input end of described data capture and pre-treater, the one obstruction monitoring and positioning device being connected with the output terminal of described data capture and pre-treater, and the monitor terminal being connected with the output terminal of described obstruction monitoring and positioning device, wherein, described bass wave transmitting device for continuing the transmitting sound wave of transmitting low frequency in pipeline, described sensor array is for gathering the transmitting sound wave of described bass wave transmitting device transmitting low frequency, by the reflection sound wave and the outside interference sound wave that stop up point reflection in described pipeline and return, and the transmitting sound wave collecting and reflection sound wave are transferred to described data capture and pre-treater, described GPS reception unit is for determining the launch time of transmitting sound wave and the reflection interval of reflection sound wave, and will transfer to launch time and reflection interval described data capture and pre-treater, described data capture and pre-treater to the transmitting sound wave receiving and reflection sound wave amplify, filtering processing, and by transmitting sound wave after treatment and reflection sound wave transfer to described obstruction monitoring and positioning device, described obstruction monitoring and positioning device for the transmitting sound wave after processed and reflection sound wave are carried out, estimate and blocking position calculates by time delay, then, by extremely described monitor terminal of the obstruction point location transmission of calculating, shown and alarm by described monitor terminal.

In a preferred embodiment, described bass wave transmitting device is made up of a solenoid valve, a solenoid valve controller and a source of the gas; Described source of the gas is arranged on described pipeline external and by being arranged on described solenoid valve and the described pipeline communication of pipeline initial station/terminal, the On/Off of described solenoid valve controller control solenoid valve.

In a preferred embodiment, described bass wave transmitting device adopts malleation sound wave or negative pressure sound wave.

In a preferred embodiment, described sensor array comprises that several are evenly arranged in the sound wave sensor in pipeline initial station/terminal vertically.

The detecting method of jam signal under strong jamming that above-mentioned monitoring pipeline blocking system realizes, it comprises the following steps:

1) bass wave transmitting device continues to launch the transmitting sound wave of low frequency in pipeline, when the range value of interference sound wave receiving when sensor array exceedes its default threshold value, monitoring pipeline blocking system proceeds to array signal immunity mode automatically, to suppress or to eliminate and disturb sound wave;

2) the transmitting sound wave collecting and reflection sound wave are transferred to data capture and pre-treater by sensor array, and GPS reception unit will transfer to data capture and pre-treater the reflection interval of the launch time of transmitting sound wave and reflection sound wave simultaneously;

3) data capture and pre-treater to the transmitting sound wave receiving and reflection sound wave amplify, filtering processing, and by transmitting sound wave after treatment and reflection sound wave transfer to obstruction monitoring and positioning device;

4) the optimum weight vectors of calculating sensor array;

5) the amplitude peak value of the optimum weight vectors of calculating sensor array is thought and is had jam signal to be detected in the time that amplitude peak value meets default thresholding;

6) stop up monitoring and positioning device and be multiplied by the velocity of sound according to the time difference between the launch time of transmitting sound wave and the reflection interval of echo signal that receive, the blocking position that stops up point is resolved;

7) stop up monitoring and positioning device the blocking position of the obstruction point obtaining after resolving is transferred to monitor terminal, shown and alarm by monitor terminal.

Carrying out above-mentioned steps 4) time, monitoring and positioning device stopped up first according to the quantity of sensor array middle pitch wave sensor, the weight vectors w=[w of calculating sensor array ₁w ₂w _l] ^t, wherein L is the quantity of sound wave sensor, w _lit is the weight of L sound wave sensor; Then minimize criterion based on output power the weight vectors w of sensor array be optimized, obtain the optimum weight vectors of sensor array:

$w_{\mathrm{opt}}=\left[\begin{array}{c}{w}_{1\mathrm{opt}}\\ {\stackrel{\‾}{w}}_{\mathrm{opt}}\end{array}\right]$

Wherein, w _1optbe the optimum weight vectors of the 1st sound wave sensor, and be the optimum weight vectors of 2nd～L sound wave sensor, and ${\stackrel{\‾}{w}}_{\mathrm{opt}}={R_{\stackrel{\‾}{\mathrm{XX}}}}^{-1}{r}_{\stackrel{\‾}{X}{X}_1},$ $R_{\stackrel{\‾}{\mathrm{XX}}}=E\left[{\stackrel{\‾}{\mathrm{XX}}}^T\right],$ $r_{\stackrel{\‾}{X}{X}_1}=E\left[\stackrel{\‾}{X}{X_1}^T\right],$ represent the mathematical expectation of matrix X, in the time that X is known, can directly calculate, similar; The representation of X is as follows:

$X=\left[\begin{array}{c}{X}_1\\ \stackrel{\‾}{X}\end{array}\right]=\left[\begin{array}{c}{x}_{1m}\\ x_{2m}\\ .\\ .\\ .\\ x_{\mathrm{im}}\end{array}\right]=\left[\begin{array}{cccc}{x}_{11}& x_{12}& ...& x_{1j}\\ x_{21}& x_{22}& ...& x_{2j}\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ x_{i1}& x_{i2}& ...& x_{\mathrm{ij}}\end{array}\right]$

Wherein, X ₁be the 1st the sound wave sensor transmitting sound wave collecting and the vector that reflects sound wave; it is the matrix that 2nd～L sound wave sensor the transmitting sound wave collecting and the vector that reflects sound wave form; x _imrepresent the data vector of m sampling of i sound wave sensor, 1≤i≤L; x _ijrepresent the sampled value of i sound wave sensor the j time, 1≤j≤m.

Carry out step 5) time, monitoring and positioning device stopped up by formula y=max (w _opt ^tx) carry out the optimum weight vectors w of calculating sensor array _optamplitude peak value.

The present invention is owing to taking above technological scheme, it has the following advantages: 1, the present invention installs multiple sound wave sensor composition sensor arraies at pipeline head end (or end), by adopting the Anti-Jamming Technique based on Array Signal Processing, can realize the faint obstruction sound wave input under strong interference environment.2, GPS reception unit of the present invention can accurately provide the sound wave signals time that each sensor gathers, by adopting multisensor correlation estimation, can calculate the time of sound wave signals arrival different sensors, recycling transducer spacing, can estimate managing interior sonic speed, improve positioning precision.3, the monitoring system of input processing method of the present invention based on being made up of bass wave transmitting device, sound wave sensor array, data capture and pre-treater, GPS reception unit, obstruction monitoring and positioning device and monitor terminal realizes, by launch sound wave in pipeline, in the time that sound wave runs into obstruction point, can get back to launching point along pipeline transmission, launch the time lag of sound wave and reflection sound wave by measurement, and in conjunction with the velocity of sound in pipeline, can accurately calculate the position of stopping up point in pipeline; Have positioning precision high, antijamming capability is strong, and to pipeline, without destructiveness, rate of false alarm is low, and loss is low, has the advantages such as good fault-tolerance; In the time that blocked area is little or interference is stronger, detection and stationkeeping ability have a distinct increment than single-sensor method tool especially.The present invention can be widely used in the pipeline monitoring in various fields.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention is carried out to detailed describing.But only the providing in order to understand better the present invention of accompanying drawing is provided, they not should be understood to limitation of the present invention.

Fig. 1 is the structural representation of monitoring pipeline blocking system of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail.

As shown in Figure 1, monitoring pipeline blocking system of the present invention comprises a bass wave transmitting device 1, a sensor array 2, a data capture and pre-treater 3, a GPS reception unit 4, obstruction monitoring and positioning device 5 and a monitor terminal 6.

Wherein, bass wave transmitting device 1 is arranged on pipeline initial station 7, and it is for the transmitting sound wave to the interior lasting transmitting low frequency of pipeline 9, and transmitting sound wave is propagated along pipeline 9 by pipeline initial station 7.Sensor array 2 is also arranged on pipeline initial station 7, and its output terminal is connected with the input end of data capture and pre-treater 3, be used for gathering various sound wave signals, comprise by bass wave transmitting device 1 launch the transmitting sound wave of low frequency, the reflection sound wave that reflected by the interior obstruction point 8 of pipeline 9 and outside interference sound wave (refer to except transmitting sound wave and reflect other sound wave signals sound wave, as start and stop pump signal, reduction valve signal, separator signal etc.), and the transmitting sound wave collecting and reflection sound wave are transferred to data capture and pre-treater 3.Another input end of data capture and pre-treater 3 connects GPS reception unit 4, GPS reception unit 4 is for accurately determining the launch time of transmitting sound wave and the reflection interval of reflection sound wave, and will transfer to launch time and reflection interval data capture and pre-treater 3.The output terminal of data capture and pre-treater 3 is connected with the input end that stops up monitoring and positioning device 5 by network, it is to the transmitting sound wave receiving and reflect the processing such as sound wave amplifies, filtering, and transmitting sound wave after treatment and reflection sound wave are transmitted through the network to obstruction monitoring and positioning device 5.The output terminal that stops up monitoring and positioning device 5 is connected with monitor terminal 6, it is for the transmitting sound wave to after processed and reflection sound wave carries out time delay estimation and blocking position calculates, then by calculate obstruction point location transmission to monitor terminal 6, shown and alarm by monitor terminal 6.

In above-described embodiment, bass wave transmitting device 1 is made up of a solenoid valve, a solenoid valve controller and a source of the gas.Source of the gas is arranged on pipeline 9 outsides and is communicated with pipeline 9 by the solenoid valve that is arranged on pipeline initial station 7, the On/Off of solenoid valve controller control solenoid valve, and then by the flow in gas inlet pipe road 9 in electromagnetic valve source of the gas.

In above-described embodiment, bass wave transmitting device 1 can adopt malleation sound wave or negative pressure sound wave, wherein malleation sound wave is defined as when the pressure outside pipeline 9 is during higher than pressure in pipeline 9, solenoid valve controller control solenoid valve throws open, pipeline 9 outer fluids can expand suddenly, produce the malleation sound wave signals of similar leakage; Negative pressure sound wave is defined as when the pressure outside pipeline 9 is during lower than pressure in pipeline 9, and solenoid valve controller control solenoid valve throws open, and pipeline 9 inner fluids can expand suddenly, produce the negative pressure sound wave signals of similar leakage.

In the above-described embodiments, sensor array 2 comprises that several are evenly arranged in the sound wave sensor in pipeline initial station 7 vertically.

In the above-described embodiments, bass wave transmitting device 1 and sensor array 2 also can be arranged on pipeline terminal.

The monitoring pipeline blocking system providing based on above-described embodiment, the invention allows for a kind of under strong interference environment the detecting method of jam signal, it comprises the following steps:

1) bass wave transmitting device 1 continues to the transmitting sound wave of the interior transmitting low frequency of pipeline 9, when the range value of the interference sound wave receiving when sensor array 2 exceedes its default threshold value, monitoring pipeline blocking system proceeds to array signal immunity mode automatically, to suppress or to eliminate and disturb sound wave, ensure the normal detection of monitoring pipeline blocking system to echo signal;

2) the transmitting sound wave collecting and reflection sound wave are transferred to data capture and pre-treater 3 by sensor array 2, and GPS reception unit 4 will transfer to data capture and pre-treater 3 reflection interval of the launch time of transmitting sound wave and reflection sound wave simultaneously;

3) data capture and pre-treater 3 to the transmitting sound wave receiving and reflection sound wave amplify, the processing such as filtering, and transmitting sound wave after treatment and reflection sound wave are transmitted through the network to and stop up monitoring and positioning device 5;

4) stop up monitoring and positioning device 5 first according to the quantity of sensor array 2 middle pitch wave sensors, the weight vectors w=[w of calculating sensor array 2 ₁w ₂w _l] ^t, wherein L is the quantity of sound wave sensor, w _lit is the weight of L sound wave sensor; Then minimize criterion based on output power the weight vectors w of sensor array 2 be optimized, obtain the optimum weight vectors of sensor array 2:

$w_{\mathrm{opt}}=\left[\begin{array}{c}{w}_{1\mathrm{opt}}\\ {\stackrel{\‾}{w}}_{\mathrm{opt}}\end{array}\right]$

Wherein, w _1optbe the optimum weight vectors of the 1st sound wave sensor, and w _1opt=1; be the optimum weight vectors of 2nd～L sound wave sensor, and ${\stackrel{\‾}{w}}_{\mathrm{opt}}={R_{\stackrel{\‾}{\mathrm{XX}}}}^{-1}{r}_{\stackrel{\‾}{X}{X}_1},$ $R_{\stackrel{\‾}{\mathrm{XX}}}=E\left[{\stackrel{\‾}{\mathrm{XX}}}^T\right],$ $r_{\stackrel{\‾}{X}{X}_1}=E\left[\stackrel{\‾}{X}{X_1}^T\right],$ represent the mathematical expectation of matrix X, in the time that X is known, can directly calculate, similar; The representation of X is as follows:

$X=\left[\begin{array}{c}{X}_1\\ \stackrel{\‾}{X}\end{array}\right]=\left[\begin{array}{c}{x}_{1m}\\ x_{2m}\\ .\\ .\\ .\\ x_{\mathrm{im}}\end{array}\right]=\left[\begin{array}{cccc}{x}_{11}& x_{12}& ...& x_{1j}\\ x_{21}& x_{22}& ...& x_{2j}\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ x_{i1}& x_{i2}& ...& x_{\mathrm{ij}}\end{array}\right]$

Wherein, X ₁be the 1st the sound wave sensor transmitting sound wave collecting and the vector that reflects sound wave; it is the matrix that 2nd～L sound wave sensor the transmitting sound wave collecting and the vector that reflects sound wave form; x _imrepresent the data vector of m sampling of i sound wave sensor, 1≤i≤L; x _ijrepresent the sampled value of i sound wave sensor the j time, 1≤j≤m;

5) stop up monitoring and positioning device 5 by the optimum weight vectors w of following formula calculating sensor array 2 _optamplitude peak value:

y＝max(w _opt ^TX)

In the time that amplitude peak value y meets default thresholding, think and have jam signal to be detected;

6) stop up monitoring and positioning device 5 and be multiplied by the velocity of sound according to the time difference between the launch time of transmitting sound wave and the reflection interval of echo signal that receive, the blocking position that stops up point 8 is resolved;

7) stop up monitoring and positioning device 5 blocking position of the obstruction point obtaining after resolving 8 is transferred to monitor terminal 6, shown and alarm by monitor terminal 6.

The various embodiments described above are only for further describing object of the present invention, technological scheme and beneficial effect; be not limited to the present invention; within the spirit and principles in the present invention all; any amendment of making, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.

Claims (8)

1. a monitoring pipeline blocking system, is characterized in that, this system comprises:

One is arranged on the bass wave transmitting device of pipeline initial station/terminal,

One is arranged on the sensor array of pipeline initial station/terminal,

Data capture and pre-treater that one input end is connected with described sensor array,

The one GPS reception unit being connected with another input end of described data capture and pre-treater,

The one obstruction monitoring and positioning device being connected with the output terminal of described data capture and pre-treater, and

One monitor terminal being connected with the output terminal of described obstruction monitoring and positioning device;

Wherein, described bass wave transmitting device for continuing the transmitting sound wave of transmitting low frequency in pipeline; Described sensor array is for gathering the transmitting sound wave of described bass wave transmitting device transmitting low frequency, by the reflection sound wave and the outside interference sound wave that stop up point reflection in described pipeline and return, and the transmitting sound wave collecting and reflection sound wave are transferred to described data capture and pre-treater; Described GPS reception unit is for determining the launch time of transmitting sound wave and the reflection interval of reflection sound wave, and will transfer to launch time and reflection interval described data capture and pre-treater; Described data capture and pre-treater to the transmitting sound wave receiving and reflection sound wave amplify, filtering processing, and by transmitting sound wave after treatment and reflection sound wave transfer to described obstruction monitoring and positioning device; Described obstruction monitoring and positioning device for the transmitting sound wave after processed and reflection sound wave are carried out, estimate and blocking position calculates by time delay, then, by extremely described monitor terminal of the obstruction point location transmission of calculating, shown and alarm by described monitor terminal.

2. monitoring pipeline blocking system as claimed in claim 1, is characterized in that, described bass wave transmitting device is made up of a solenoid valve, a solenoid valve controller and a source of the gas; Described source of the gas is arranged on described pipeline external and by being arranged on described solenoid valve and the described pipeline communication of pipeline initial station/terminal, the On/Off of described solenoid valve controller control solenoid valve.

3. monitoring pipeline blocking system as claimed in claim 1, is characterized in that, described bass wave transmitting device adopts malleation sound wave or negative pressure sound wave.

4. monitoring pipeline blocking system as claimed in claim 2, is characterized in that, described bass wave transmitting device adopts malleation sound wave or negative pressure sound wave.

5. monitoring pipeline blocking system as claimed in claim 1 or 2 or 3 or 4, is characterized in that, described sensor array comprises that several are evenly arranged in the sound wave sensor in pipeline initial station/terminal vertically.

6. the detecting method of jam signal under strong jamming that adopts described in claim 5 that monitoring pipeline blocking system realizes, it comprises the following steps:

1) bass wave transmitting device continues to launch the transmitting sound wave of low frequency in pipeline, when the range value of interference sound wave receiving when sensor array exceedes its default threshold value, monitoring pipeline blocking system proceeds to array signal immunity mode automatically, to suppress or to eliminate and disturb sound wave;

2) the transmitting sound wave collecting and reflection sound wave are transferred to data capture and pre-treater by sensor array, and GPS reception unit will transfer to data capture and pre-treater the reflection interval of the launch time of transmitting sound wave and reflection sound wave simultaneously;

3) data capture and pre-treater to the transmitting sound wave receiving and reflection sound wave amplify, filtering processing, and by transmitting sound wave after treatment and reflection sound wave transfer to obstruction monitoring and positioning device;

4) the optimum weight vectors of calculating sensor array;

5) the amplitude peak value of the optimum weight vectors of calculating sensor array is thought and is had jam signal to be detected in the time that amplitude peak value meets default thresholding;

6) stop up monitoring and positioning device and be multiplied by the velocity of sound according to the time difference between the launch time of transmitting sound wave and the reflection interval of echo signal that receive, the blocking position that stops up point is resolved;

7) stop up monitoring and positioning device the blocking position of the obstruction point obtaining after resolving is transferred to monitor terminal, shown and alarm by monitor terminal.

As claimed in claim 6 under strong jamming the detecting method of jam signal, it is characterized in that, carrying out above-mentioned steps 4) time, monitoring and positioning device stopped up first according to the quantity of sensor array middle pitch wave sensor, the weight vectors w=[w of calculating sensor array ₁w ₂w _l] ^t, wherein L is the quantity of sound wave sensor, w _lit is the weight of L sound wave sensor; Then minimize criterion based on output power the weight vectors w of sensor array be optimized, obtain the optimum weight vectors of sensor array:

$w_{\mathrm{opt}}=\left[\begin{array}{c}{w}_{1\mathrm{opt}}\\ {\stackrel{\‾}{w}}_{\mathrm{opt}}\end{array}\right]$

Wherein, w _1optbe the optimum weight vectors of the 1st sound wave sensor, and be the optimum weight vectors of 2nd～L sound wave sensor, and ${\stackrel{\‾}{w}}_{\mathrm{opt}}={R_{\stackrel{\‾}{\mathrm{XX}}}}^{-1}{r}_{\stackrel{\‾}{X}{X}_1},$ $R_{\stackrel{\‾}{\mathrm{XX}}}=E\left[{\stackrel{\‾}{\mathrm{XX}}}^T\right],$ $r_{\stackrel{\‾}{X}{X}_1}=E\left[\stackrel{\‾}{X}{X_1}^T\right],$ represent the mathematical expectation of matrix X, in the time that X is known, can directly calculate, similar; The representation of X is as follows:

$X=\left[\begin{array}{c}{X}_1\\ \stackrel{\‾}{X}\end{array}\right]=\left[\begin{array}{c}{x}_{1m}\\ x_{2m}\\ .\\ .\\ .\\ x_{\mathrm{im}}\end{array}\right]=\left[\begin{array}{cccc}{x}_{11}& x_{12}& ...& x_{1j}\\ x_{21}& x_{22}& ...& x_{2j}\\ .& .& .& .\\ .& .& .& .\\ .& .& .& .\\ x_{i1}& x_{i2}& ...& x_{\mathrm{ij}}\end{array}\right]$

Wherein, X ₁be the 1st the sound wave sensor transmitting sound wave collecting and the vector that reflects sound wave; it is the matrix that 2nd～L sound wave sensor the transmitting sound wave collecting and the vector that reflects sound wave form; x _imrepresent the data vector of m sampling of i sound wave sensor, 1≤i≤L; x _ijrepresent the sampled value of i sound wave sensor the j time, 1≤j≤m.

As claimed in claim 7 under strong jamming the detecting method of jam signal, it is characterized in that, carry out step 5) time, stop up monitoring and positioning device by formula y=max (w _opt ^tx) carry out the optimum weight vectors w of calculating sensor array _optamplitude peak value.