CN110836331A - System and method for monitoring leakage of pipelines and valve wells in soil - Google Patents
System and method for monitoring leakage of pipelines and valve wells in soil Download PDFInfo
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- CN110836331A CN110836331A CN201910968977.5A CN201910968977A CN110836331A CN 110836331 A CN110836331 A CN 110836331A CN 201910968977 A CN201910968977 A CN 201910968977A CN 110836331 A CN110836331 A CN 110836331A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The application provides a system and a method for monitoring leakage in pipelines and valve wells in soil. The method comprises the following steps: receiving the concentration of combustible gas sent by a first detector; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector. The system can monitor the combustible gas concentration of the valve well and the pipe network in real time, locate leakage points when the combustible gas concentration is monitored to exceed a threshold value, and alarm. This application can also predict the combustible gas concentration of future time to realize the gas and leak the early warning, prevent that danger from taking place. And the monitoring equipment is tracked to prevent stealing, so that property loss caused by equipment stealing by lawbreakers can be prevented.
Description
Technical Field
The application belongs to the technical field of combustible gas monitoring, and particularly relates to a system and a method for monitoring leakage in pipelines and valve wells in soil.
Background
In recent years, because catastrophic accidents caused by oil and gas pipeline leakage frequently occur, most of leakage which is not damaged by external force comes from joints of pipelines and valve sealing positions, and therefore, a valve well is the central importance of pipeline leakage monitoring.
In recent years, the negative pressure wave method is used to locate a fluid leakage position in a pipe. The position of the fluid leakage can be positioned by detecting the time when a negative pressure wave signal generated when the fluid in the pipeline leaks reaches the detector and multiplying the propagation speed of the secondary sound wave in the fluid.
However, the propagation speed of the negative pressure wave is affected by the type and the property of the fluid, the type of the pipeline medium, the temperature, the pressure, the flow speed, the density and the like, the fluctuation range is large, the positioning distance is inaccurate, the actual reference significance is lacked, once leakage occurs near the valve well, combustible gas is accumulated in the valve well and is not dispersed in time, and the danger is extremely high.
Disclosure of Invention
The application provides a leakage monitoring system and method in pipeline and valve well in soil, can carry out real-time supervision to the combustible gas concentration of valve well and pipe network to fix a position the leakage point when monitoring that combustible gas concentration exceeds the threshold value.
The embodiment of the first aspect of the application provides a system and a method for monitoring leakage in pipelines and valve wells in soil, which comprise the following steps:
receiving the concentration of combustible gas sent by a first detector;
when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance;
and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
In some embodiments of the present application, the locating a current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each of the second detectors includes:
respectively determining a correction distance corresponding to each second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector;
respectively determining a plurality of predicted distances between the first detector and the current combustible gas leakage point according to the combustible gas concentration and the correction distance corresponding to each second detector;
and according to a plurality of predicted distances between the first detector and the current combustible gas leakage point, positioning the region of the combustible gas leakage point.
In some embodiments of the present application, the determining, according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each of the second detectors, a correction distance corresponding to each of the second detectors respectively includes:
calculating a concentration change value corresponding to the second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to the second detector;
determining a correction distance corresponding to the second detector through a formula (1) according to the concentration change value;
in the formula (1), X is the correction distance, Δ N is a concentration change value,
porosity of the porous medium, dsThe diameter of the porous medium particles, mu is the viscosity of the gas, rho is the density of the gas, u is the apparent gas velocity, PxIs a pressure correction factor.
In some embodiments of the present application, the determining a plurality of predicted distances between the first detector and a current combustible gas leakage point according to the combustible gas concentration and the corrected distance corresponding to each of the second detectors respectively includes:
determining the distance between the second detector and the current combustible gas leakage point through a formula (2) according to the combustible gas concentration corresponding to the second detector and the correction distance;
in the formula (2), LxThe distance between the first detector and the current combustible gas leakage point is calculated; n is a radical of1T is the concentration value N of the combustible gas monitored by a second detector with the number of 1 when T is1，X1The corrected distance corresponding to the second detector with the number 1.
In some embodiments of the present application, the method further comprises:
storing detection information corresponding to the first detector, wherein the detection information comprises the combustible gas concentration and the receiving time sent by the first detector;
acquiring all detection information corresponding to the first detector stored in the preset time period every other preset time period;
and determining a concentration presumption value corresponding to the time to be presumed according to all the detection information.
In some embodiments of the present application, the determining, according to all the detection information, a concentration presumption value corresponding to a time to be presumed includes:
determining whether three pieces of detection information meeting a preset condition exist in all the pieces of detection information;
if the three pieces of detection information meeting the preset conditions exist, determining a speculation coefficient according to the combustible gas concentration and the receiving time included in the three pieces of detection information;
and calculating a concentration presumption value corresponding to the time to be presumed according to the time to be presumed and the presumption coefficient.
In some embodiments of the present application, after determining the concentration presumption value corresponding to the time to be presumed, the method further includes:
and if the concentration presumption value corresponding to the time to be presumed exceeds the preset concentration, sending early warning information to a monitoring terminal, wherein the early warning information comprises the time to be presumed and the concentration presumption value.
In some embodiments of the present application, the method further comprises:
receiving acceleration data sent by the first detector; when the acceleration data exceed a preset threshold value, acquiring the position coordinates of the first detector at a preset frequency; if different position coordinates of the first detector with the preset number are obtained within the preset time, sending stolen alarm information to a monitoring terminal; alternatively, the first and second electrodes may be,
acquiring the position coordinates of the first detector according to a preset period; and if the distance between the position coordinate corresponding to the current period and the position coordinate corresponding to the previous period exceeds a preset value, sending theft alarm information to the monitoring terminal.
The embodiment of the second aspect of the application provides a leakage monitoring device in pipeline and valve well in soil, which comprises:
the receiving module is used for receiving the concentration of the combustible gas sent by the first detector;
the acquisition module is used for acquiring the combustible gas concentration monitored by all second detectors, the distance between which and the first detector is less than the preset distance, when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector;
and the positioning module is used for positioning the current combustible gas leakage points according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
The embodiment of the third aspect of the application provides a leakage monitoring system in a pipeline and a valve well in soil, which comprises a main station and one or more monitoring substations;
the monitoring substation is used for monitoring the combustible gas concentration of the monitoring substation through a first detector and sending the combustible gas concentration to the main station;
the master station is used for receiving the combustible gas concentration sent by the first detector; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
in the embodiment of the application, the combustible gas concentration sent by the first detector is received; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector. The system can monitor the combustible gas concentration of the valve well and the pipe network in real time, locate leakage points when the combustible gas concentration is monitored to exceed a threshold value, and alarm. This application can also predict the combustible gas concentration of future time to realize the gas and leak the early warning, prevent that danger from taking place. And the monitoring equipment is tracked to prevent stealing, so that property loss caused by equipment stealing by lawbreakers can be prevented.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings.
In the drawings:
FIG. 1 illustrates a system architecture diagram upon which a method for monitoring leaks in pipelines and valve wells in the soil is based, according to an embodiment of the present application;
FIG. 2 illustrates a flow chart of a method for leak monitoring in a pipeline and valve well in the soil according to an embodiment of the present application;
FIG. 3 illustrates a schematic view of a leak location provided by an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating another exemplary leak location provided by an embodiment of the present application;
fig. 5 shows a schematic diagram of a leak monitoring device in a pipeline and valve well in the soil according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The following describes a system and a method for monitoring leakage in pipelines and valve wells in soil according to embodiments of the present application with reference to the accompanying drawings.
Example 1
The embodiment of the application provides a method for monitoring leakage in pipelines and valve wells in soil, which is based on a system architecture as shown in figure 1, wherein the system architecture comprises a main station, one or more monitoring substations and one or more monitoring terminals. Wherein, the monitoring terminal comprises a handheld terminal 5 or a computer and the like. The main station comprises a server 1, an uninterrupted power supply 2, a server power line 3 and a wireless base station 4. The monitoring substation comprises a valve well substation and a pipe network substation, wherein the valve well substation comprises one or more valve well sentinel detectors, and the valve well sentinel detectors acquire combustible gas concentration, ambient temperature, liquid level and GPS (Global positioning system) position information. The pipe network substation comprises one or more pipe network sentinel detectors, and the pipe network sentinel detectors acquire combustible gas concentration, ambient temperature, liquid level and GPS position information.
Valve well sentinel detectors 6 and 7, and pipe network sentinel detectors 8 and 9 are schematically depicted in fig. 1. Wherein, valve well sentinel detector 6, valve well sentinel detector 7, pipe network sentinel detector 8, pipe network sentinel detector 9 carry out data communication through wireless and server 1, and uninterrupted power supply 2 carries out uninterrupted power supply for server 1 through server power cord 3. The data in the server can be checked through the monitoring terminal, and the monitoring terminal can be a handheld terminal or a computer and the like.
The monitoring substation adopts the most advanced combustible gas detection sensor, anti-theft sensor, liquid sensor, temperature sensor, ultra-low power consumption MCU (micro controller Unit) and Nbit (Narrow Band Internet of Things) communication module with stronger penetration, can monitor the combustible gas concentration, air humidity, temperature and GPS position in the pipeline and valve well in an omnibearing way, and transmits the position to the main station system in real time, thereby providing sufficient data support for the main station. And the server of the main station runs a leakage monitoring program, analyzes the data uploaded by the monitoring substation in real time, indicates the leakage position if monitoring that the leakage generates a system alarm, and sends an alarm short message.
The valve well sentinel detector and the pipe network sentinel detector respectively monitor the combustible gas concentration in the corresponding sub-stations, the monitored combustible gas concentration is sent to the server included by the main station, the server determines whether the combustible gas concentration exceeds the standard or not at present according to the received combustible gas concentration, and when the combustible gas concentration exceeds the standard, the gas leakage point is positioned and the alarm is given. As shown in fig. 2, the method specifically includes the following steps:
step 101: and receiving the combustible gas concentration sent by the first detector.
The first detector can be a valve well sentinel detector or a pipe network sentinel detector which are located at different positions and is used for acquiring the combustible gas concentration at the position of the first detector in real time and sending the acquired combustible gas concentration to the server of the main station at preset time intervals.
Step 102: and when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring the combustible gas concentration monitored by all the second detectors, wherein the distance between the first detectors and the combustible gas concentration is smaller than the preset distance.
For the first detectors arranged in each monitoring substation, an independent alarm threshold corresponding to each first detector is preset in the server, and specifically, the corresponding relation between the equipment identifier of the first detector and the alarm threshold is set.
The first detector sends the monitored combustible gas concentration to the server and sends the equipment identification of the first detector to the server. After receiving the combustible gas concentration and the equipment identification sent by the first detector, the server acquires a preset alarm threshold corresponding to the first detector according to the equipment identification, compares the combustible gas concentration with the preset alarm threshold, and if the combustible gas concentration is greater than or equal to the alarm threshold corresponding to the first detector, indicates that a gas leakage point exists in the current system, and needs to be positioned and alarmed. And the server sends an alarm short message to a designated monitoring terminal, wherein the alarm short message comprises the equipment identifier of the first detector with combustible gas concentration exceeding the alarm threshold value.
The server is pre-stored with the deployment position of the first detector included in each monitoring substation, and all the detectors, the distance between which and the first detector with the combustible gas concentration exceeding the alarm threshold value is smaller than the preset distance, are determined according to the stored deployment positions of all the first detectors. For convenience of description, the determined detector is referred to as a second detector in the embodiments of the present application. And the server acquires the combustible gas concentration monitored by all the second detectors.
Step 103: and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
The embodiment of the application specifically performs the positioning of the leakage point through the following operations of steps S1-S3, including:
s1: and respectively determining the correction distance corresponding to each second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
And calculating a concentration change value corresponding to the second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to the second detector. The concentration change value is the absolute value of the difference between the combustible gas concentration corresponding to the second detector and the combustible gas concentration corresponding to the first detector. Determining a correction distance corresponding to the second detector through a formula (1) according to the concentration change value corresponding to the second detector;
in the formula (1), X is a correction distance, Δ N is a concentration variation value,
porosity of the porous medium, dsThe diameter of the porous medium particles, mu is the viscosity of the gas, rho is the density of the gas, u is the apparent gas velocity, PxIs a pressure correction factor.
And respectively calculating the correction distance corresponding to each second detector by the formula (1).
S2: and respectively determining a plurality of prediction distances between the first detector and the current combustible gas leakage point according to the combustible gas concentration and the correction distance corresponding to each second detector.
For each second detector, determining the distance between the second detector and the current combustible gas leakage point through a formula (2) according to the combustible gas concentration and the correction distance corresponding to the second detector;
in the formula (2), LxThe distance between the first detector and the current combustible gas leakage point is obtained; n is a radical of1T is the concentration value N of the combustible gas monitored by a second detector with the number of 1 when T is1，X1The corrected distance corresponding to the second detector with the number 1.
In this embodiment of the application, for a plurality of second detectors whose distances from the first detector are smaller than the preset distance, the second detectors may be numbered in the order from small to large, for example, the second detectors are numbered in sequence as 1, 2, 3, 4, and the like. Then, for each second detector, a plurality of predicted distances between the first detector and the gas leakage point are respectively calculated according to the operations of the above steps S1 and S2.
S3: and positioning the area of the combustible gas leakage point according to a plurality of predicted distances between the first detector and the current combustible gas leakage point.
If the combustible gas concentrations monitored by the first detector and the second detector are equal due to leakage of the gas leakage point, the gas leakage point is indicated to be located on a perpendicular bisector of a connecting line of the positions where the first detector and the second detector are located, and the distance between the gas leakage point and the first detector is equal to the distance between the gas leakage point and the second detector.
According to the operations of the above steps S1 and S2, a plurality of possible predicted distances of the gas leakage point from the first detector are obtained by calculating the first detector and the plurality of second detectors one by one. The predicted distance is the perpendicular bisector of the line between the corresponding second detector and the first detector. If only one second detector participates in the calculation, only one possible prediction distance is calculated, namely a perpendicular bisector, the perpendicular bisector is an area where the gas leakage point is located, and the gas leakage point is located on the perpendicular bisector. If only two second detectors participate in the calculation, two possible prediction distances are calculated for the two second detectors, namely two perpendicular bisectors, and the intersection point of the two perpendicular bisectors is the positioned gas leakage point.
And when the number of the second detectors is more than or equal to 3, calculating to obtain a plurality of possible prediction distances, wherein the number of the perpendicular bisectors is more than or equal to 3, and a polygonal area formed by intersecting the plurality of perpendicular bisectors is an area where the positioned combustible gas leakage point is located. Wherein, assuming that the number of the second detectors is n, the number of the sides of the formed polygon is n. As shown in fig. 3, when three second detectors 1, 2 and 3 participate in the calculation, a triangular area is obtained, and the gas leakage point is within the triangular area. As shown in fig. 4, when four second detectors 1, 2, 3 and 4 participate in the calculation, a quadrilateral area is obtained, and the gas leakage point is in the quadrilateral area.
In this application embodiment, confirm that the combustible gas concentration that first detector corresponds exceeds alarm threshold value through above-mentioned mode to after locating out the region at current gas leakage point place, can also take place alarm information and give monitor terminal, this alarm information includes the regional positional information at gas leakage point place. And the monitoring terminal receives the alarm information and displays the alarm information. After the monitoring personnel see the alarm information that monitor terminal shows, can in time go to the region at gas leakage point place and carry out safety inspection and maintenance, avoid the combustible gas who leaks to continuously pile up and cause danger.
The embodiment of the application detects the concentration of combustible gas in the valve well through the valve well sentinel detector in the valve well substation to and detect the concentration of combustible gas in near soil of buried pipeline through the pipe network sentinel detector in the pipe network substation, directly monitor, calculate through advanced mathematical model, not only can report to the police fast, can calculate combustible gas's trend of change simultaneously, and combustible gas's concentration distribution.
For each first detector, the first detector sends the monitored combustible gas concentration to the server at fixed time intervals. The server stores detection information corresponding to the first detector, wherein the detection information comprises the combustible gas concentration sent by the first detector and the receiving time corresponding to the combustible gas concentration. The server may then estimate a future trend of the combustible gas concentration at the position of the first detector by:
the server acquires all detection information corresponding to the first detector stored in the preset time period every other preset time period; and determining a concentration presumption value corresponding to the time to be presumed according to all the detection information.
Specifically, the server determines, every preset time interval, whether three pieces of detection information meeting a preset condition exist in all the detection information corresponding to the first detector stored in the preset time interval. The preset time period may be 1 hour or 2 hours, etc. Assuming that three pieces of detection information meeting the preset condition are detection information 1, 2, and 3, respectively, the preset condition is that the absolute value of the difference between the combustible gas concentration included in the detection information 2 and the combustible gas concentration of the detection information 1 is smaller than a preset value, and the absolute value of the difference between the combustible gas concentration included in the detection information 3 and the combustible gas concentration of the detection information 2 is smaller than the preset value.
In the process of determining three pieces of detection information meeting preset conditions, assuming that the preset time is 1 hour, the server takes out all the detection information monitored by the first detector stored in the last hour, and sorts the detection information in order of time, the latest detection information is arranged at the front, and so on, the 1 st data, namely the latest detection information, is found out first from the detection information and is marked (x1, y1), the x is marked as a linux timestamp of the first detection information, x1 is set as a starting point 0, and y1 is the combustible gas concentration of the first detection information. Then, when the 2 nd piece of detection information is found, if the absolute value of the difference value between the combustible gas concentration values of the 1 st piece of detection information and the 2 nd piece of detection information is smaller than a preset value, the 3 rd piece of detection information is continuously found until the difference value between the concentration values of the found piece of detection information and the 1 st piece of detection information is larger than the preset value, the piece of detection information is marked (x2, y2), x2 is the time stamp of the second piece of detection information minus x, namely the linux time stamp of the first piece of detection information is subtracted, and y2 is the combustible gas concentration of the piece of detection information. And then, with the piece of found detection information as a starting point, repeating the above process until (x3, y3) is found, wherein x3 is the time stamp of the third piece of detection information minus the time stamp of the second piece of detection information, and if the 3 pieces of detection information are not found until the detection information is found out, the concentration fluctuation monitored by the first detector is considered to be small, stable and safe.
And if the three pieces of detection information meeting the preset conditions exist, determining a prediction coefficient according to the combustible gas concentration and the receiving time included in the three pieces of detection information.
Specifically, when the three pieces of probe information satisfying the preset condition are aligned, the found 3 points (x1, y1), (x2, y2), and (x3, y3) are substituted into the estimated coefficient formula shown below. Wherein m, a, b and c are all estimation coefficients.
m＝x12×x2+x22×x3+x1×x32-x32×x2-x22×x1-x12×x3
a＝(y1×x2+y2×x3+y3×x1-y3×x2-y2×x1-y1×x3)÷m
b＝(x12×y2+x22×y3+x32×y1-x32×y2-x22×y1-x12×y3)÷m
c＝(x12×x2×y3+x22×x3×y1+x32×x1×y2-x32×x2×y1-x22×x1×y3-x12×x3×y2)÷m
After determining each estimation coefficient in the above manner, the concentration estimation value corresponding to the time to be estimated is calculated according to the time to be estimated and the estimation coefficient. Specifically, the future gas concentration is estimated by the following estimation formula.
y＝(a×x2+b×x+c)×m
Wherein x is the time to be guessed, and y is the concentration guess value corresponding to the time to be guessed.
Let (x4, y4), x4 is the time stamp of the third piece of data plus a certain time length to obtain the time to be estimated, such as plus 1 minute or 2 minutes. The value of y4 is obtained by substituting the time to be estimated and each estimation coefficient into the estimation formula. Assuming that x4 is the timestamp of the third piece of data plus 1 minute, the estimated concentration value corresponding to the first detector after 1 minute can be estimated, and so on, the estimated concentration value after 2 minutes and the estimated concentration value after 3 minutes can be obtained, and so on, the estimated concentration value within 24 hours can be calculated, one value for each minute. In the embodiment of the present application, a future concentration change curve may be generated according to the estimated concentration values corresponding to different estimated time to be estimated.
After the concentration presumption value corresponding to the future first detector is presumed through the method, if the concentration presumption value corresponding to the time to be presumed exceeds the preset concentration, the early warning information is sent to the monitoring terminal, the early warning information comprises the time to be presumed and the concentration presumption value, so that maintenance personnel can find out the reason of the concentration rise in advance when the concentration of the combustible gas is still in the safe range, and the danger is prevented.
In this application embodiment, the detector equipment in the monitoring sub-station is easily stolen by lawless persons, and this application embodiment provides a scheme that monitoring of stealing and stealing were tracked, specifically includes: an acceleration sensor is arranged in the detector equipment, acceleration data of the first detector are collected through the acceleration sensor, and the acceleration data comprise accelerations in the directions of an x axis, a y axis and a z axis. The first detector sends the acquired acceleration data to the server. And if the detector device detects that the acceleration in any direction exceeds a preset threshold value, the GPS acquisition program is actively started, GPS coordinate acquisition is carried out at a fixed frequency, and the acquired coordinate position is sent to the server.
The server receives acceleration data sent by the first detector, and when the acceleration in any direction included in the acceleration data exceeds a preset threshold, the position coordinate of the first detector is obtained at a preset frequency. And if different position coordinates of the first detector with the preset number are obtained within the preset time, sending stolen alarm information to the monitoring terminal. Or acquiring the position coordinates of the first detector according to a preset period; and if the distance between the position coordinate corresponding to the current period and the position coordinate corresponding to the previous period exceeds a preset value, sending theft alarm information to the monitoring terminal.
The server can also generate a GPS track according to the position coordinates of the first detector, and the GPS track is carried in the stolen alarm information and sent to the monitoring terminal. The user can check all the tracks of the detector equipment by checking the GPS tracks, and the last GPS point is the current position of the detector equipment. When the first detector continuously sends 6 GPS data at the frequency of 10 seconds, the server generates a theft alarm, sends an alarm short message to a specified mobile phone and generates a GPS track.
In the embodiment of the application, the combustible gas concentration sent by the first detector is received; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector. The system can monitor the combustible gas concentration of the valve well and the pipe network in real time, locate leakage points when the combustible gas concentration is monitored to exceed a threshold value, and alarm. This application can also predict the combustible gas concentration of future time to realize the gas and leak the early warning, prevent that danger from taking place. And the monitoring equipment is tracked to prevent stealing, so that property loss caused by equipment stealing by lawbreakers can be prevented.
Example 2
The embodiment of the present application provides a device for monitoring leakage in a pipeline and a valve well in soil, which is used for executing the method for monitoring leakage in a pipeline and a valve well in soil according to the above embodiment, as shown in fig. 5, the device includes:
the receiving module 100 is configured to receive the combustible gas concentration sent by the first detector;
the obtaining module 200 is configured to obtain, when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, the combustible gas concentrations monitored by all second detectors, of which the distances to the first detector are smaller than a preset distance;
and the positioning module 300 is configured to position a current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each of the second detectors.
The positioning module 300 includes:
the corrected distance determining unit is used for respectively determining the corrected distance corresponding to each second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector;
a prediction distance determining unit, configured to determine, according to the combustible gas concentration and the correction distance corresponding to each second detector, a plurality of prediction distances between the first detector and a current combustible gas leakage point respectively;
and the positioning unit is used for positioning the area of the combustible gas leakage point according to a plurality of predicted distances between the first detector and the current combustible gas leakage point.
The corrected distance determining unit is configured to calculate a concentration change value corresponding to the second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to the second detector; determining a correction distance corresponding to the second detector through a formula (1) according to the concentration change value;
in the formula (1), X is the correction distance, Δ N is a concentration change value,
porosity of the porous medium, dsThe diameter of the porous medium particles, mu is the viscosity of the gas, rho is the density of the gas, u is the apparent gas velocity, PxIs a pressure correction factor.
The predicted distance determining unit is configured to determine, according to the combustible gas concentration and the corrected distance corresponding to the second detector, a distance between the second detector and a current combustible gas leakage point by using a formula (2);
in the formula (2), LxThe distance between the first detector and the current combustible gas leakage point is calculated; n is a radical of1T is the concentration value N of the combustible gas monitored by a second detector with the number of 1 when T is1，X1The corrected distance corresponding to the second detector with the number 1.
In an embodiment of the present application, the apparatus further includes:
the concentration presumption module is used for storing detection information corresponding to the first detector, and the detection information comprises the combustible gas concentration and the receiving time sent by the first detector; acquiring all detection information corresponding to the first detector stored in the preset time period every other preset time period; and determining a concentration presumption value corresponding to the time to be presumed according to all the detection information.
The concentration presumption module is configured to determine whether three pieces of detection information satisfying a preset condition exist in all the pieces of detection information; if the three pieces of detection information meeting the preset conditions exist, determining a speculation coefficient according to the combustible gas concentration and the receiving time included in the three pieces of detection information; and calculating a concentration presumption value corresponding to the time to be presumed according to the time to be presumed and the presumption coefficient.
The device also includes: and the early warning module is used for sending early warning information to a monitoring terminal if the concentration presumption value corresponding to the time to be presumed exceeds a preset concentration, wherein the early warning information comprises the time to be presumed and the concentration presumption value.
The device also includes: the anti-theft module is used for receiving the acceleration data sent by the first detector; when the acceleration data exceed a preset threshold value, acquiring the position coordinates of the first detector at a preset frequency; if different position coordinates of the first detector with the preset number are obtained within the preset time, sending stolen alarm information to a monitoring terminal; or, the position coordinate of the first detector is acquired according to a preset period; and if the distance between the position coordinate corresponding to the current period and the position coordinate corresponding to the previous period exceeds a preset value, sending theft alarm information to the monitoring terminal.
In the embodiment of the application, the combustible gas concentration sent by the first detector is received; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector. The system can monitor the combustible gas concentration of the valve well and the pipe network in real time, locate leakage points when the combustible gas concentration is monitored to exceed a threshold value, and alarm. This application can also predict the combustible gas concentration of future time to realize the gas and leak the early warning, prevent that danger from taking place. And the monitoring equipment is tracked to prevent stealing, so that property loss caused by equipment stealing by lawbreakers can be prevented.
Example 3
The embodiment of the application provides a leakage monitoring system in a pipeline and a valve well in soil, which comprises a main station and one or more monitoring substations;
the monitoring substation is used for monitoring the combustible gas concentration of the monitoring substation through a first detector and sending the combustible gas concentration to the main station;
the master station is used for receiving the combustible gas concentration sent by the first detector; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
In the embodiment of the application, the combustible gas concentration sent by the first detector is received; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector. The system can monitor the combustible gas concentration of the valve well and the pipe network in real time, locate leakage points when the combustible gas concentration is monitored to exceed a threshold value, and alarm. This application can also predict the combustible gas concentration of future time to realize the gas and leak the early warning, prevent that danger from taking place. And the monitoring equipment is tracked to prevent stealing, so that property loss caused by equipment stealing by lawbreakers can be prevented.
Example 4
An embodiment of the present application provides an electronic device, including: the system comprises a memory, a processor and an executable program stored on the memory, wherein the executable program is executed by the processor to realize the method for monitoring the leakage in the pipeline and the valve well in the soil.
Example 5
In order to implement the embodiments described above, the present application further proposes a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program, when executed by a processor, implementing the method for monitoring a leak in a pipe and a valve well in soil according to any of the embodiments described above.
It should be noted that:
the algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may be used with the teachings herein. The required structure for constructing such a device will be apparent from the description above. In addition, this application is not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the present application.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the creation apparatus of a virtual machine according to embodiments of the present application. The present application may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A method of monitoring for leaks in pipelines and valve wells in the soil, comprising:
receiving the concentration of combustible gas sent by a first detector;
when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance;
and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
2. The method of claim 1, wherein locating a current combustible gas leak based on the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each of the second detectors comprises:
respectively determining a correction distance corresponding to each second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector;
respectively determining a plurality of predicted distances between the first detector and the current combustible gas leakage point according to the combustible gas concentration and the correction distance corresponding to each second detector;
and according to a plurality of predicted distances between the first detector and the current combustible gas leakage point, positioning the region of the combustible gas leakage point.
3. The method of claim 2, wherein the determining the corrected distance for each of the second detectors according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each of the second detectors comprises:
calculating a concentration change value corresponding to the second detector according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to the second detector;
determining a correction distance corresponding to the second detector through a formula (1) according to the concentration change value;
in the formula (1), X is the correction distance, Δ N is a concentration change value,
porosity of the porous medium, dsThe diameter of the porous medium particles, mu is the viscosity of the gas, rho is the density of the gas, u is the apparent gas velocity, PxIs a pressure correction factor.
4. The method of claim 2, wherein determining a plurality of predicted distances between the first detector and a current combustible gas leak based on the combustible gas concentration and the corrected distance for each of the second detectors comprises:
determining the distance between the second detector and the current combustible gas leakage point through a formula (2) according to the combustible gas concentration corresponding to the second detector and the correction distance;
in the formula (2), LxThe distance between the first detector and the current combustible gas leakage point is calculated; n is a radical of1T is the concentration value N of the combustible gas monitored by a second detector with the number of 1 when T is1，X1The corrected distance corresponding to the second detector with the number 1.
5. The method according to any one of claims 1-4, further comprising:
storing detection information corresponding to the first detector, wherein the detection information comprises the combustible gas concentration and the receiving time sent by the first detector;
acquiring all detection information corresponding to the first detector stored in the preset time period every other preset time period;
and determining a concentration presumption value corresponding to the time to be presumed according to all the detection information.
6. The method according to claim 5, wherein the determining a concentration presumption value corresponding to a time to be presumed according to all the detection information comprises:
determining whether three pieces of detection information meeting a preset condition exist in all the pieces of detection information;
if the three pieces of detection information meeting the preset conditions exist, determining a speculation coefficient according to the combustible gas concentration and the receiving time included in the three pieces of detection information;
and calculating a concentration presumption value corresponding to the time to be presumed according to the time to be presumed and the presumption coefficient.
7. The method of claim 5, wherein after determining the concentration guess value corresponding to the time to be guessed, the method further comprises:
and if the concentration presumption value corresponding to the time to be presumed exceeds the preset concentration, sending early warning information to a monitoring terminal, wherein the early warning information comprises the time to be presumed and the concentration presumption value.
8. The method according to any one of claims 1-4, further comprising:
receiving acceleration data sent by the first detector; when the acceleration data exceed a preset threshold value, acquiring the position coordinates of the first detector at a preset frequency; if different position coordinates of the first detector with the preset number are obtained within the preset time, sending stolen alarm information to a monitoring terminal; alternatively, the first and second electrodes may be,
acquiring the position coordinates of the first detector according to a preset period; and if the distance between the position coordinate corresponding to the current period and the position coordinate corresponding to the previous period exceeds a preset value, sending theft alarm information to the monitoring terminal.
9. A leak monitoring device in a pipeline and valve well in the soil, comprising:
the receiving module is used for receiving the concentration of the combustible gas sent by the first detector;
the acquisition module is used for acquiring the combustible gas concentration monitored by all second detectors, the distance between which and the first detector is less than the preset distance, when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector;
and the positioning module is used for positioning the current combustible gas leakage points according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
10. A system for monitoring leakage in pipelines and valve wells in soil is characterized by comprising a main station and one or more monitoring substations;
the monitoring substation is used for monitoring the combustible gas concentration of the monitoring substation through a first detector and sending the combustible gas concentration to the main station;
the master station is used for receiving the combustible gas concentration sent by the first detector; when the combustible gas concentration exceeds the alarm threshold corresponding to the first detector, acquiring combustible gas concentrations monitored by all second detectors, wherein the distance between the first detectors and the combustible gas concentrations is smaller than a preset distance; and positioning the current combustible gas leakage point according to the combustible gas concentration corresponding to the first detector and the combustible gas concentration corresponding to each second detector.
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