阅读说明：本技术 一种海底输油管道泄漏监测系统及方法 (Submarine oil pipeline leakage monitoring system and method ) 是由 李清平 张晓灵 姚海元 李焱 蒋晓斌 郑利军 王清 陈海宏 程兵 秦蕊 刘永飞 于 2020-11-25 设计创作，主要内容包括：本发明涉及一种海底输油管道泄漏监测系统及方法,其特征在于,包括分站系统和主站系统,其中,每一分站系统均包括次声波传感器、前置放大器、数据采集装置和BD/GPS授时装置,主站系统包括数据处理系统和显示终端；次声波传感器用于实时采集待测管道内对应监测点处介质的次声波信号并转换为次声波电信号；前置放大器用于对次声波电信号进行放大滤波；数据采集装置用于将放大滤波后的次声波电信号转换为次声波数据；BD/GPS授时装置用于得到校准后的次声波数据,并发送至数据处理系统；数据处理系统用于判断待测管道是否存在泄漏以及确定泄漏点的位置,本发明可广泛用于海底管道监测领域中。(The invention relates to a submarine oil pipeline leakage monitoring system and method, which is characterized by comprising substation systems and a master station system, wherein each substation system comprises an infrasonic wave sensor, a preamplifier, a data acquisition device and a BD/GPS time service device, and the master station system comprises a data processing system and a display terminal; the infrasonic wave sensor is used for acquiring an infrasonic wave signal of a medium at a corresponding monitoring point in the pipeline to be detected in real time and converting the infrasonic wave signal into an infrasonic wave electric signal; the preamplifier is used for amplifying and filtering the infrasonic wave electric signal; the data acquisition device is used for converting the amplified and filtered infrasonic wave electric signals into infrasonic wave data; the BD/GPS time service device is used for obtaining calibrated infrasonic data and sending the infrasonic data to the data processing system; the data processing system is used for judging whether the pipeline to be detected has leakage or not and determining the position of a leakage point, and the invention can be widely applied to the field of submarine pipeline monitoring.)

1. A subsea oil pipeline leak monitoring system comprising a substation system and a master station system, wherein each substation system comprises:

the system comprises infrasonic wave sensors, a data acquisition module and a data processing module, wherein the infrasonic wave sensors are respectively fixedly arranged at monitoring points corresponding to a pipeline to be detected and are used for acquiring infrasonic wave signals of media at the corresponding monitoring points in the pipeline to be detected in real time and converting the infrasonic wave signals into infrasonic wave electric signals;

the preamplifier is used for amplifying and filtering the infrasonic wave electric signal;

the data acquisition device is used for converting the amplified and filtered infrasonic wave electric signals into infrasonic wave data;

the BD/GPS time service device is used for carrying out time calibration on the infrasonic data to obtain calibrated infrasonic data;

the master station system includes:

the data processing system is used for analyzing and processing the calibrated infrasonic data, judging whether the pipeline to be detected has leakage or not and determining the position of a leakage point;

and the display terminal is used for displaying the infrasonic wave waveform, the pipeline map of the pipeline to be tested, the position of the leakage point and the state of the substation system.

2. A subsea oil pipeline leak monitoring system according to claim 1, characterized in that within said data processing system are disposed:

the filtering module is used for filtering the calibrated infrasonic data to obtain filtered infrasonic data;

the characteristic extraction module is used for extracting the characteristics of the filtered infrasonic data;

the template matching module is used for pre-establishing a leakage signal template and a working condition signal template, and performing template matching according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm;

the positioning calculation module is used for determining the position of a leakage point according to the time difference between the calibrated infrasonic data based on the template matching result;

and the early warning module is used for early warning through the display terminal when a leakage point exists in the pipeline to be detected.

3. A subsea oil pipeline leak monitoring system as set forth in claim 1, wherein each of said infrasonic transducers receives a sonic frequency in the range of 0.001Hz to 20 Hz.

4. The system according to claim 1, wherein each of said BD/GPS time service units is connected to said data processing system via a corresponding data communication device.

5. A system for monitoring the leakage of an oil pipeline under the sea according to claim 4, wherein each of said data communication means is a wireless or wired communication.

6. The system according to claim 1, wherein the BD/GPS time service device has a time service accuracy of nanosecond level.

7. A submarine oil pipeline leakage monitoring system according to claim 1, wherein the number of said substation systems is 2, and two said infrasonic sensors are respectively fixedly disposed at both ends of the pipeline to be tested.

8. A method for monitoring subsea oil pipeline leakage according to any of claims 1-7, characterized by the following:

1) respectively arranging substation systems at monitoring points corresponding to the pipelines to be detected;

2) the infrasonic wave sensors respectively adopt infrasonic wave signals of media at corresponding monitoring points, convert the infrasonic wave signals into infrasonic wave electric signals and send the infrasonic wave electric signals to corresponding preamplifiers;

3) the preamplifier amplifies and filters the received infrasonic wave electric signal and then sends the amplified infrasonic wave electric signal to a corresponding data acquisition device;

4) the data acquisition device converts the received amplified and filtered infrasonic wave electric signals into infrasonic wave data and then sends the infrasonic wave data to the corresponding BD/GPS time service device;

5) the BD/GPS time service device carries out time calibration on the infrasonic wave data of the corresponding substation system to obtain calibrated infrasonic wave data, and the calibrated infrasonic wave data are sent to the data processing system;

6) the data processing system analyzes and processes the calibrated infrasonic data, judges whether the pipeline to be tested has leakage or not and determines the position of a leakage point;

7) and the display terminal displays the infrasonic wave shape, a pipeline map of the pipeline to be detected, the position of a leakage point and the state of the substation system.

9. The method for monitoring the leakage of the submarine oil pipeline according to claim 8, wherein the specific process of step 6) is as follows:

6.1) the filtering module carries out filtering processing on the calibrated infrasonic data to obtain filtered infrasonic data;

6.2) extracting the characteristics of the filtered infrasound data by a characteristic extraction module;

6.3) a template matching module establishes a leakage signal template and a working condition signal template in advance, and performs template matching according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm;

and 6.4) the positioning calculation module judges whether the pipeline to be detected has leakage or not and determines the position of a leakage point according to the time difference between the calibrated infrasonic data based on the template matching result.

10. A method for monitoring leakage in a subsea oil pipeline according to claim 9, characterized in that the specific process of step 6.3) is:

6.3.1) a leakage signal template and a working condition signal template are pre-established by a template matching module;

6.3.2) extracting partial data from the leakage signal template and the working condition signal template by the template matching module as sample data and putting the sample data and the corresponding classification into the support vector machine model for training, detecting the support vector machine model according to the residual data in the leakage signal template and the working condition signal template and adjusting the parameters of the support vector machine model;

6.3.3) when the data processing system receives the calibrated infrasonic data, inputting the calibrated infrasonic data into the support vector machine model after the parameters are adjusted for classification, and determining that the calibrated infrasonic data belongs to a leakage signal or a working condition signal;

6.3.4) the template matching module calls the corresponding template according to the classification result to carry out template matching on the extracted features.

Technical Field

The invention relates to a submarine oil pipeline leakage monitoring system and method, and belongs to the field of submarine pipeline monitoring.

Background

Offshore oil production platforms and submarine oil pipelines are important factors for guaranteeing national energy safety, and once leakage occurs, serious safety and environmental accidents are caused because the oil pipelines are buried in the seabed. Therefore, leak monitoring of pipelines and the timely discovery of leak events are very important. Meanwhile, the oil pipeline is deeply buried in the seabed, so that the pipeline monitoring difficulty is high.

At present, a manual inspection method, a pressure wave method and a flow monitoring method are all common methods for monitoring leakage of a submarine pipeline, but the methods have the problems of low sensitivity, inaccurate positioning and reaction lag.

Disclosure of Invention

In view of the above problems, the present invention provides a system and a method for monitoring the leakage of a submarine oil pipeline, which have high sensitivity, precise positioning and quick response.

In order to achieve the purpose, the invention adopts the following technical scheme: a subsea oil pipeline leak monitoring system comprising a substation system and a master station system, wherein each substation system comprises:

the system comprises infrasonic wave sensors, a data acquisition module and a data processing module, wherein the infrasonic wave sensors are respectively fixedly arranged at monitoring points corresponding to a pipeline to be detected and are used for acquiring infrasonic wave signals of media at the corresponding monitoring points in the pipeline to be detected in real time and converting the infrasonic wave signals into infrasonic wave electric signals;

the preamplifier is used for amplifying and filtering the infrasonic wave electric signal;

the data acquisition device is used for converting the amplified and filtered infrasonic wave electric signals into infrasonic wave data;

the BD/GPS time service device is used for carrying out time calibration on the infrasonic data to obtain calibrated infrasonic data;

the master station system includes:

the data processing system is used for analyzing and processing the calibrated infrasonic data, judging whether the pipeline to be detected has leakage or not and determining the position of a leakage point;

and the display terminal is used for displaying the infrasonic wave waveform, the pipeline map of the pipeline to be tested, the position of the leakage point and the state of the substation system.

Further, the data processing system is internally provided with:

the filtering module is used for filtering the calibrated infrasonic data to obtain filtered infrasonic data;

the characteristic extraction module is used for extracting the characteristics of the filtered infrasonic data;

the template matching module is used for pre-establishing a leakage signal template and a working condition signal template, and matching the templates according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm;

the positioning calculation module is used for determining the position of a leakage point according to the time difference between the calibrated infrasonic data based on the template matching result;

and the early warning module is used for early warning through the display terminal when a leakage point exists in the pipeline to be detected.

Furthermore, the sound wave frequency received by each infrasonic wave sensor is 0.001 Hz-20 Hz.

Furthermore, each BD/GPS time service device is connected with the data processing system through a corresponding data communication device.

Furthermore, each data communication device adopts a wireless or wired communication mode.

Furthermore, the time service precision of the BD/GPS time service device is in a nanosecond level.

Furthermore, the number of the substation systems is 2, and the two infrasonic wave sensors are respectively and fixedly arranged at two ends of the pipeline to be detected.

A method of monitoring subsea pipeline leaks, comprising the steps of:

1) respectively arranging substation systems at monitoring points corresponding to the pipelines to be detected;

2) the infrasonic wave sensors respectively adopt infrasonic wave signals of media at corresponding monitoring points, convert the infrasonic wave signals into infrasonic wave electric signals and send the infrasonic wave electric signals to corresponding preamplifiers;

3) the preamplifier amplifies and filters the received infrasonic wave electric signal and then sends the amplified infrasonic wave electric signal to the corresponding data acquisition device;

4) the data acquisition device converts the received amplified and filtered infrasonic wave electric signals into infrasonic wave data and then sends the infrasonic wave data to the corresponding BD/GPS time service device;

5) the BD/GPS time service device carries out time calibration on the infrasonic wave data of the corresponding substation system to obtain calibrated infrasonic wave data, and the infrasonic wave data are sent to the data processing system;

6) the data processing system analyzes and processes the calibrated infrasonic data, judges whether the pipeline to be detected leaks or not and determines the position of a leakage point;

7) and the display terminal displays the infrasonic wave shape, a pipeline map of the pipeline to be detected, the position of a leakage point and the state of the substation system.

Further, the specific process of step 6) is as follows:

6.1) the filtering module carries out filtering processing on each calibrated infrasound data to obtain filtered infrasound data;

6.2) extracting the characteristics of the filtered infrasound data by a characteristic extraction module;

6.3) a template matching module establishes a leakage signal template and a working condition signal template in advance, and performs template matching according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm;

and 6.4) the positioning calculation module judges whether the pipeline to be detected has leakage or not and determines the position of a leakage point according to the time difference between the calibrated infrasonic data based on the template matching result.

Further, the specific process of step 6.3) is as follows:

6.3.1) a leakage signal template and a working condition signal template are pre-established by a template matching module;

6.3.2) extracting partial data from the leakage signal template and the working condition signal template by the template matching module, taking the partial data as sample data and putting the sample data and the corresponding classification into the support vector machine model for training, detecting the support vector machine model according to the residual data in the leakage signal template and the working condition signal template, and adjusting the parameters of the support vector machine model;

6.3.3) when the data processing system receives the calibrated infrasonic data, inputting the calibrated infrasonic data into the support vector machine model after adjusting the parameters for classification, and determining that the calibrated infrasonic data belongs to leakage signals or working condition signals;

6.3.4) the template matching module calls the corresponding template according to the classification result to carry out template matching on the extracted features.

Due to the adoption of the technical scheme, the invention has the following advantages:

1. when a leakage event of the submarine pipeline occurs, liquid at the leakage position of the pipeline is sprayed out at a high speed and rubs with the pipe wall to generate infrasonic waves which are transmitted to the two ends of the pipeline along a medium.

2. The substation system is provided with the infrasonic wave sensor with high sensitivity, can monitor infrasonic wave signals of media in the pipeline to be detected in real time, reduces the possibility of system faults due to redundancy design, judges whether the submarine oil pipeline leaks or not through the data processing system of the master station system after a series of processing, can monitor the submarine oil pipeline in real time uninterruptedly, can give an alarm in time and accurately when the pipeline leaks, has high efficiency, and can maintain the pipeline in time according to the alarm information by related personnel, so that the harm is minimized.

3. The substation system provided by the invention is provided with the high-precision BD/GPS time service device, so that the time synchronization precision of substation systems of different monitoring points can be ensured, and the alarm can be given timely, effectively and accurately when a pipeline leakage event occurs.

4. The invention can reduce the false alarm rate and further improve the detection rate of the leakage point on the premise of eliminating the false alarm of the working condition, and can be widely applied to the field of submarine pipeline monitoring.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a data processing flow diagram of a data processing module in the system of the present invention.

Detailed Description

The present invention is described in detail below with reference to the attached drawings. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.

As shown in fig. 1, the submarine oil pipeline leakage monitoring system provided by the present invention comprises two substation systems 1 and a master station system 2, wherein each substation system 1 comprises an infrasonic sensor 3, a preamplifier 4, a data acquisition device 5, a BD/GPS (Beidou/global positioning system) time service device 6 and a data communication device, which are connected in sequence, and the master station system 2 comprises a data processing system 7 and a display terminal 8.

The two-time acoustic wave sensor 3 is respectively and fixedly arranged at monitoring points at two ends of the pipeline to be detected, and the infrasonic wave sensor 3 is used for acquiring infrasonic wave signals of media corresponding to the monitoring points in the pipeline to be detected in real time, converting the infrasonic wave signals into infrasonic wave electric signals and transmitting the infrasonic wave electric signals to the corresponding preamplifier 4.

The preamplifier 4 is used for amplifying and filtering the received infrasonic wave electric signals and sending the infrasonic wave electric signals to the corresponding data acquisition device 5.

The data acquisition device 5 is used for converting the amplified and filtered infrasonic wave electric signals into infrasonic wave data and sending the infrasonic wave data to the corresponding BD/GPS time service device 6.

The BD/GPS time service device 6 is used for carrying out time calibration on the infrasonic wave data of the corresponding substation system 1 to obtain the infrasonic wave data after the time calibration so as to solve the problem of time synchronization among different monitoring points, and the infrasonic wave data are sent to the data processing system 7 through the corresponding data communication device.

The data processing system 7 is used for analyzing and processing the calibrated infrasonic data by adopting a signal processing and identifying algorithm, judging whether the pipeline to be detected has leakage or not and determining the position of a leakage point, wherein the signal processing and identifying algorithm can be a signal processing mode such as an expert database, a fuzzy neural network, wavelet transformation and the like.

The display terminal 8 is used for displaying infrasonic wave waveforms, a pipeline map of a pipeline to be tested, positions of leakage points, an operation interface and states of the substation system 1, wherein the operation interface comprises menus and buttons and is used for setting system parameters, inquiring states, printing, popping alarm information and the like, and the states of the substation system 1 comprise whether the substation system 1 works normally, whether communication is delayed or not and whether the substation system 1 is stopped or not.

In a preferred embodiment, a filtering module, a feature extraction module, a template matching module, a positioning calculation module, an early warning module and a sorting module are arranged in the data processing system 7.

The filtering module is used for filtering the calibrated infrasonic data to obtain filtered infrasonic data.

The feature extraction module is used for extracting features of the filtered infrasonic data, wherein the features include highest amplitude, lowest amplitude, frequency, average value, root mean square value, skewness, kurtosis and crest factor.

The template matching module is used for pre-establishing a leakage signal template and a working condition signal template, and performing template matching according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm.

And the positioning calculation module is used for determining the position of the leakage point according to the time difference between the calibrated infrasonic data based on the template matching result.

The early warning module is used for carrying out early warning through display terminal 8 when the pipeline that awaits measuring has the leak source.

The sorting module is used for sorting abnormal infrasonic signals, namely leakage signals according to detection time based on the propagation characteristics of the infrasonic signals in the pipeline and rejecting the leakage signals which do not meet the correlation conditions of the homologous signals of the multi-substation.

In a preferred embodiment, the sound wave frequency received by each sound wave sensor 3 is 0.001 Hz-20 Hz.

In a preferred embodiment, each data communication device can adopt a wireless or wired communication mode.

In a preferred embodiment, the time service precision of the BD/GPS time service device 6 is in the nanosecond level.

The method of use of the subsea pipeline leak monitoring system of the present invention is described in detail by the following specific embodiments:

1) and respectively arranging the two substation systems 1 at monitoring points at two ends of the pipeline to be detected.

2) The two-time acoustic wave sensor 3 respectively collects infrasonic wave signals of media at corresponding monitoring points, converts the infrasonic wave signals into infrasonic wave electric signals and then sends the infrasonic wave electric signals to the corresponding preamplifier 4.

3) The two preamplifiers 4 amplify and filter the received infrasonic wave electric signals and then send the amplified infrasonic wave electric signals to the corresponding data acquisition device 5.

4) The two data acquisition devices 5 convert the received amplified and filtered infrasonic wave electric signals into infrasonic wave data and then send the infrasonic wave data to the corresponding BD/GPS time service device 6.

5) The two BD/GPS time service devices 6 perform time calibration on the infrasonic wave data of the corresponding substation system 1 to obtain calibrated infrasonic wave data, and the calibrated infrasonic wave data are sent to the data processing system 7 through the corresponding data communication device.

6) As shown in fig. 2, the data processing system 7 adopts a signal processing and recognition algorithm to analyze and process the calibrated infrasonic data, determine whether the pipeline to be tested has leakage and determine the position of the leakage point, specifically:

6.1) the filtering module carries out filtering processing on the calibrated infrasound data to obtain filtered infrasound data.

6.2) extracting the characteristics of the filtered infrasonic data by a characteristic extraction module, wherein the characteristics comprise the highest amplitude, the lowest amplitude, frequency, average value, root mean square value, skewness, kurtosis and crest factor.

6.3) the template matching module establishes a leakage signal template and a working condition signal template in advance, and performs template matching according to the calibrated infrasonic data and the correspondingly extracted features by adopting a template matching method and a support vector machine algorithm:

6.3.1) the template matching module establishes a leakage signal template and a working condition signal template in advance, wherein the leakage signal template is a template including leakage signals, and the working condition signal template is a template including working condition signals (not including infrasonic signals) generated by components such as a pressure pump, a reducing component, an elbow and the like.

6.3.2) extracting partial data from the leakage signal template and the working condition signal template by the template matching module, putting the partial data serving as sample data and corresponding classification into the support vector machine model for training, detecting the support vector machine model according to the residual data in the leakage signal template and the working condition signal template, and adjusting parameters of the support vector machine model.

6.3.3) when the data processing system 7 receives the calibrated infrasonic data, inputting the calibrated infrasonic data into the support vector machine model after the parameters are adjusted for classification, and determining that the calibrated infrasonic data belongs to the leakage signal or the working condition signal.

6.3.4) the template matching module calls the corresponding template according to the classification result to match the extracted features, so as to improve the recognition rate and accuracy of the whole system.

And 6.4) the positioning calculation module judges whether the pipeline to be detected has leakage or not and determines the position of a leakage point according to the time difference between the calibrated infrasonic data based on the template matching result.

6.5) for the condition that the interference signals in the pipeline to be detected are more, the sorting module sorts abnormal infrasonic signals, namely leakage signals according to the detection time based on the propagation characteristics of the infrasonic signals in the pipeline, and eliminates the leakage signals which do not meet the correlation conditions of the homologous signals of the multi-substation so as to improve the identification rate of the leakage signals, wherein the correlation conditions of the homologous signals of the multi-substation are the propagation attenuation frequency domain characteristics and the cross-correlation coefficients of the signals.

6.6) the data processing system 7 can also identify the working condition operation of the middle valve chamber of the pipeline to be detected according to the characteristics of the working condition signals and the matching result of the extracted characteristics and the working condition signal template, and meanwhile, the positioning time, the positioning place and the upstream and downstream related components are combined.

7) The display terminal 8 displays infrasonic wave waveforms, a pipeline map of a pipeline to be detected, the operation interface and the state of the substation system 1, and performs early warning when a leakage point exists in the pipeline to be detected, wherein the operation interface comprises a menu and a button and is used for system parameter setting, state inquiry printing, alarm information popping and the like, and the state of the substation system 1 comprises whether the substation system 1 works normally, whether communication is delayed or not and whether the substation system 1 is stopped or not.

The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.