A method and system for monitoring a pipeline

Abstract

The application provides a pipeline monitoring method and system, comprising: arranging at least one detector in a pipeline to be detected, and enabling the detector to float along with liquid in the pipeline to be detected; the detector emitting electromagnetic waves in a pipeline cross section at a current position according to a preset time interval, and acquiring position data, pressure data and electromagnetic wave data reflected by a pipeline wall at the current position; obtaining an average amplitude of electromagnetic waves at the current position according to the acquired electromagnetic wave data, and determining a health condition of the pipeline to be detected at the current position according to the average amplitude of electromagnetic waves at the current position, the pressure data and a preset error threshold. The application can improve the accuracy of pipeline health monitoring and reduce operation and maintenance costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water supply pipeline, in particular to a pipeline monitoring method and system. BACKGROUND

[0002] It is worth noting that in the process of daily operation, the water supply pipeline often has problems such as aging, corrosion and untimely maintenance, which leads to the phenomenon of water supply pipeline leakage or blockage, and seriously damages the water supply function of the water supply pipeline.

[0003] For example, since the water supply pipeline is mostly a pressure pipe and is mostly buried underground, it is often affected by external load and soil chemical corrosion, which causes the pipeline to deform or leak. Water supply pipeline leakage not only causes pressure reduction and water resource waste, but also causes ground scouring, soil loss, and even road subsidence, which seriously affects people's life and property safety. In addition, for example, since the tap water body usually has microorganisms such as iron bacteria, when cast iron, steel and other materials are used as raw materials for water supply pipeline, the inner wall of the water supply pipeline will be continuously corroded, causing rust or inner lining peeling. With the increase of the service life of the pipeline, the suspended matter such as rust accumulates in the pipeline, causing the water pipe to age, the water carrying capacity to decrease, and the flow rate in the pipeline to change, which leads to a decrease in water supply quality and further affects the health of citizens.

[0004] In the prior art, the commonly used leakage detection methods for water supply pipeline mainly include acoustic detection method, infrared spectrum method, ground penetrating radar method, pipeline endoscopy method and pressure monitoring method. The acoustic detection method is suitable for shallow buried metal leakage, but it is greatly affected by external noise and has low detection accuracy. Although the ground penetrating radar has high detection accuracy, it has high operation cost, long detection time and high requirement for personnel operation ability. The pipeline endoscopy method moves a remote control robot in the pipeline and takes pictures to record the leakage area for professional personnel to make a judgment, but the robot is expensive, and the water in the pipeline needs to be completely drained before detection, which has high time and economic cost and is not conducive to further promotion. The pressure monitoring method monitors the internal pressure of the pipeline along the line, uses pressure change to judge the leakage area of the pipeline, has single judgment standard, and is easily disturbed by water hammer and other hydraulic phenomena, which cannot accurately locate the pipeline leakage area, leading to untimely repair and maintenance and causing property loss. SUMMARY

[0005] Therefore, the present application provides a pipeline monitoring method and system, which can improve the accuracy of pipeline health monitoring and reduce operation and maintenance cost.

[0006] The technical scheme of the present application is implemented as follows:

[0007] A pipeline monitoring method, comprising the following steps:

[0008] at least one detector is arranged in the pipeline to be measured, and the detector is arranged to float with the liquid in the pipeline to be measured;

[0009] the detector emits electromagnetic waves in the pipeline cross section at the current position at a preset time interval, and acquires position data, pressure data and electromagnetic wave data reflected by the pipeline wall at the current position;

[0010] the average amplitude of the electromagnetic waves at the current position is obtained according to the acquired electromagnetic wave data, and the health condition of the pipeline at the current position is determined according to the average amplitude of the electromagnetic waves at the current position, the pressure data and a preset error threshold value.

[0011] Preferably, the preset error threshold value includes a pressure error threshold value and an average amplitude error threshold value; wherein the pressure error threshold value is the product of the measured pressure data in the normal pipeline and a preset pressure error coefficient; and the average amplitude error threshold value is the product of the average amplitude of the electromagnetic waves measured in the normal pipeline and a preset amplitude error coefficient.

[0012] Preferably, the determination of the health condition of the pipeline at the current position according to the average amplitude of the electromagnetic waves at the current position, the pressure data and the preset error threshold value includes:

[0013] a pressure difference value between the pressure at the current position in the pipeline to be measured and the pressure error threshold value is calculated, and the health condition of the pipeline at the current position is preliminarily determined according to the size of the pressure difference value and a preset first fluctuation value and / or a second fluctuation value;

[0014] an amplitude difference value between the average amplitude of the electromagnetic waves at the current position in the pipeline to be measured and the average amplitude error threshold value is calculated, and the health condition of the pipeline at the current position is further determined according to the size of the amplitude difference value and a preset third fluctuation value.

[0015] Preferably, the preliminary determination of the health condition of the pipeline at the current position according to the size of the pressure difference value and the preset first fluctuation value and / or the second fluctuation value includes: when the pressure difference value obtained by subtracting the pressure error threshold value from the pressure at the current position in the pipeline to be measured is greater than or equal to the second fluctuation value, it is preliminarily determined that water hammer occurs at the current position, or the pipeline at the current position has a protrusion or a depression;

[0016] the further determination of the health condition of the pipeline at the current position according to the size of the amplitude difference value and the preset third fluctuation value includes: when the amplitude difference value obtained by subtracting the average amplitude error threshold value from the average amplitude of the electromagnetic waves at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a protrusion or a depression; otherwise, it is determined that water hammer occurs at the current position, and the pipeline is not damaged.

[0017] Preferably, the step of preliminarily determining the health condition of the current position in the pipeline according to the pressure difference value and the first fluctuation value and / or the second fluctuation value comprises: when the pressure difference value between the pressure at the current position in the pipeline and the pressure error threshold is less than or equal to the first fluctuation value, it is preliminarily determined that the pipeline at the current position is undamaged.

[0018] The step of further determining the health condition of the current position in the pipeline according to the amplitude difference value and the third fluctuation value comprises: when the amplitude difference value between the average amplitude of the electromagnetic wave at the current position and the average amplitude error threshold is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position is bulged or recessed; otherwise, it is determined that the pipeline at the current position is undamaged.

[0019] Preferably, the step of preliminarily determining the health condition of the current position in the pipeline according to the pressure difference value and the first fluctuation value and / or the second fluctuation value comprises: when the pressure difference value between the pressure at the current position in the pipeline and the pressure error threshold is greater than the first fluctuation value and less than the second fluctuation value, it is preliminarily determined that the pipeline at the current position is undamaged.

[0020] The step of further determining the health condition of the current position in the pipeline according to the amplitude difference value and the third fluctuation value comprises: when the amplitude difference value between the average amplitude of the electromagnetic wave at the current position and the average amplitude error threshold is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position is bulged or recessed, or the phenomenon of foreign matter accumulation caused by peeling of the pipeline lining; otherwise, it is determined that the pipeline at the current position is undamaged.

[0021] Preferably, the step of preliminarily determining the health condition of the current position in the pipeline according to the pressure difference value and the first fluctuation value and / or the second fluctuation value comprises: when the pressure difference value between the pressure error threshold and the pressure at the current position in the pipeline is greater than or equal to the second fluctuation value, it is preliminarily determined that the pipeline at the current position has a leakage phenomenon or is caused by the water pump stopping water supply.

[0022] The step of further determining the health condition of the current position in the pipeline according to the amplitude difference value and the third fluctuation value comprises: when the amplitude difference value between the average amplitude of the electromagnetic wave at the current position and the average amplitude error threshold is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position is caused by the water pump stopping water supply; when the amplitude difference value between the average amplitude error threshold and the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a leakage phenomenon; otherwise, it is determined that the pipeline at the current position is undamaged.

[0023] A pipeline monitoring system comprises at least one detector and a processing module.

[0024] The detector is arranged in a pipeline to be monitored and floats with the flow in the liquid in the pipeline to be monitored; the detector is configured to emit electromagnetic waves in the pipeline cross section at the current position at preset time intervals, and acquire position data, pressure data and electromagnetic wave data reflected by the pipeline wall at the current position.

[0025] The processing module is configured to obtain the average amplitude of the electromagnetic waves at the current position according to the acquired electromagnetic wave data, and determine the health condition of the pipeline at the current position according to the average amplitude of the electromagnetic waves at the current position, the pressure data and a preset error threshold.

[0026] Preferably, the pipeline monitoring system further comprises a plurality of wireless data receiving units arranged at a preset distance apart from the pipeline to be monitored, configured to receive the position data, pressure data and electromagnetic wave data emitted by the detector, and transmit the position data, pressure data and electromagnetic wave data as signal data to the processing module.

[0027] Preferably, the pipeline monitoring system further comprises a display module, which further comprises a warning unit and a repair display unit.

[0028] The warning unit is configured to issue an abnormal pipeline warning according to the health condition of the pipeline.

[0029] The repair display unit is configured to display the specific position of the abnormal pipeline section and the specific problem according to the health condition of the pipeline.

[0030] As can be seen from the above, in the pipeline monitoring method and system of the present application, the average amplitude of the reflected electromagnetic waves and the pressure are combined to judge the sub-health condition of the pipeline, so that accurate monitoring of the pipeline can be realized; further, the monitoring process does not affect the daily use of the pipeline, no additional construction such as excavation and drainage is required, the pipeline is less damaged, the monitoring method is convenient, no expensive equipment is required, the operation ability and technical requirement of the personnel are also lower, thereby reducing the operation and maintenance cost. Abnormal conditions of the pipeline can be found in time, so that pipeline problems can be handled in time or in advance, to prevent the pipeline from being seriously damaged due to untimely repair and causing loss of manpower and material resources. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The flowchart of the pipeline monitoring method in the embodiment of the present application.

[0032] Figure 2 The schematic diagram of the detector in the embodiment of the present application.

[0033] Figure 3 The echo signal image of the normal pipeline in the embodiment of the present application.

[0034] Figure 4 Echo signal image of the position where deformation occurs in the pipeline in the embodiment of the present application.

[0035] Figure 5 Echo signal image of the position where leakage occurs in the pipeline in the embodiment of the present application.

[0036] Figure 6 Echo signal image of the normal pipeline of DN1000 cast iron pipe in the embodiment of the present application.

[0037] Figure 7 Phase-amplitude / pressure head image of the normal pipeline of DN1000 cast iron pipe in the embodiment of the present application.

[0038] Figure 8 Phase-amplitude / pressure head image one of the abnormal pipeline section of DN1000 cast iron pipe in the embodiment of the present application.

[0039] Figure 9 Phase-amplitude / pressure head image two of the abnormal pipeline section of DN1000 cast iron pipe in the embodiment of the present application.

[0040] Figure 10 Structure diagram of the pipeline monitoring system in the embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0042] Figure 1 Flow chart of the pipeline monitoring method in the embodiment of the present application.

[0043] As shown in Figure 1 the pipeline monitoring method in the embodiment of the present application includes the following steps:

[0044] Step 101, at least one detector is arranged in the pipeline to be measured, and the detector is made to float downstream in the liquid in the pipeline to be measured;

[0045] Step 102, the detector emits electromagnetic waves in the pipeline cross section at the current position according to a preset time interval, and obtains position data, pressure data and electromagnetic wave data reflected by the pipe wall at the current position;

[0046] Step 103, the average amplitude of the electromagnetic wave at the current position is obtained according to the obtained electromagnetic wave data, and the health condition of the pipeline at the current position is determined according to the average amplitude of the electromagnetic wave at the current position, the pressure data and a preset error threshold.

[0047] In one embodiment of the present application, referring to Figure 2 For example, at least one probe 1 can be put into the water pipeline to be measured. Due to the laminar flow in the water pipeline, the probe floats downstream at a constant speed under the pressure. During the process, the probe 1 can emit electromagnetic waves in the pipeline cross section at the current position at a preset time interval, and simultaneously acquire the position data and pressure data at the current position. The emitted electromagnetic waves are reflected when encountering the pipeline wall. Since the mediums on both sides of the signal wave reflection interface are generally water and metal respectively (for example, the water pipeline can be a pipeline made of steel or cast iron), the electromagnetic properties of the two materials are quite different, so the reflected electromagnetic waves have a certain energy. When the reflection signal spectrum of the electromagnetic waves in each direction in the cross section of the pipeline to be measured is displayed, the waveforms are shown, so that the amplitudes of the electromagnetic waves in each direction in the cross section can be obtained, and then the average amplitude of the electromagnetic waves in the cross section can be obtained. The echo signal image at the current position can also be further output, as shown in Figure 3 When the current position in the pipeline deforms or leaks, the echo signal image will also change, as shown in Figure 4 and Figure 5 , thereby causing the change of the average amplitude. Of course, when the deformation or leakage occurs in the water pipeline to be measured, the pressure at the current position will also change. Therefore, the health status of the current position of the pipeline to be measured can be determined by combining the average amplitude of the electromagnetic waves at the current position, the pressure data and the preset error threshold.

[0048] In the technical solution of the present application, the pipeline monitoring method described above can be implemented by using various implementation methods. The technical solution of the present application will be described in detail below by taking several implementation modes as examples.

[0049] For example, preferably, in one embodiment of the present application, the preset error threshold includes a pressure error threshold and an average amplitude error threshold; wherein the pressure error threshold is the product of the measured pressure data in the normal pipeline and a preset pressure error coefficient; and the average amplitude error threshold is the product of the average amplitude of the electromagnetic waves measured in the normal pipeline and a preset amplitude error coefficient.

[0050] Preferably, in one embodiment of the present application, the measured pressure data in the normal pipeline is F0, the preset pressure error coefficient is b, then the pressure error threshold is bF0; the average amplitude of the electromagnetic waves measured in the normal pipeline is A0, the preset amplitude error coefficient is a, then the average amplitude error threshold is aA0.

[0051] Further, as an example, in one embodiment of the present application, the determining the health condition at the current position of the pipeline under test according to the average amplitude of the electromagnetic wave at the current position, the pressure data and the preset error threshold value comprises:

[0052] Step 31, calculating the pressure difference between the pressure at the current position in the pipeline under test and the pressure error threshold value, and preliminarily determining the health condition at the current position in the pipeline under test according to the size of the pressure difference and the preset first fluctuation value and / or the second fluctuation value;

[0053] Step 32, calculating the amplitude difference between the average amplitude of the electromagnetic wave at the current position in the pipeline under test and the average amplitude error threshold value, and further determining the health condition at the current position in the pipeline under test according to the size of the amplitude difference and the preset third fluctuation value.

[0054] Preferably, as an example, in one specific embodiment of the present application, the pressure data at the current position can be F, the preset first fluctuation value can be 0.1F0 (wherein 0.1 is a preset empirical value), and the preset second fluctuation value can be 0.3F0 (wherein 0.3 is a preset empirical value); the average amplitude at the current position can be A, and the preset third fluctuation value can be 0.1A0 (wherein 0.1 is a preset empirical value).

[0055] For example, preferably, in the first embodiment of the present application, the preliminarily determining the health condition at the current position in the pipeline under test according to the size of the pressure difference and the preset first fluctuation value and / or the second fluctuation value in step 31 can comprise: when the pressure difference obtained by subtracting the pressure error threshold value from the pressure at the current position in the pipeline under test is greater than or equal to the second fluctuation value, preliminarily determining that water hammer occurs at the current position, or that the pipeline at the current position has protrusions or depressions;

[0056] The further determining the health condition at the current position in the pipeline under test according to the size of the amplitude difference and the preset third fluctuation value in step 32 can comprise: when the amplitude difference obtained by subtracting the average amplitude error threshold value from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, determining that the pipeline at the current position has protrusions or depressions; otherwise, determining that water hammer occurs at the current position, and that the pipeline is not damaged.

[0057] Preferably, as an example, in one specific embodiment of the present application:

[0058] When F-bF0≥0.3F0, it means that the monitored pressure F at the current position changes by more than or equal to 0.3 times the pressure F0 in the normal pipeline within the error allowed range. This case indicates that the pressure at the pipe segment suddenly increases, thereby it can be preliminarily determined that water hammer occurs at the current position, or the pipeline at the current position has protrusions or depressions; if this case occurs frequently at the position, the pipeline at the position needs to be maintained, for example, an automatic exhaust valve or other equipment can be added to reduce the harm to the pipeline, and the specific case needs to be further determined in combination with the average amplitude data at the position;

[0059] When A-aA0≥0.1A0, it means that the monitored average amplitude A at the current position changes by more than or equal to 0.1 times the average amplitude A0 in the normal pipeline within the error allowed range. This case can indicate that the average amplitude at the pipe segment suddenly increases, thereby it can be determined that the pipeline at the current position has protrusions or depressions, so that maintenance personnel can be dispatched in time to maintain and avoid danger; otherwise, it means that the average amplitude at the current position normally fluctuates in a small range, and it is determined that the pipeline at the current position is undamaged.

[0060] For example, preferably, in the second embodiment of the present application, the step 31 of preliminarily determining the health condition of the pipeline at the current position in the to-be-tested pipeline according to the size of the pressure difference value and the preset first fluctuation value and / or the second fluctuation value can include: when the pressure difference value between the pressure at the current position in the to-be-tested pipeline and the pressure error threshold is less than or equal to the first fluctuation value, it is preliminarily determined that the pipeline at the current position is undamaged.

[0061] The step 32 of further determining the health condition of the pipeline at the current position in the to-be-tested pipeline according to the size of the amplitude difference value and the preset third fluctuation value can include: when the amplitude difference value obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has protrusions or depressions; otherwise, it is determined that the pipeline at the current position is undamaged.

[0062] Preferably, as an example, in a specific embodiment of the present application:

[0063] When |F-bF0|≤0.1F0, it means that the pressure at the current position in the to-be-tested pipeline belongs to normal fluctuation without abnormal conditions, but it is still possible that the pipe segment deforms, and the specific case needs to be further determined in combination with the average amplitude data at the position;

[0064] When A-aA0≥ 0.1A0, the average amplitude increases, indicating that the pipe at this position has a convex or concave deformation, and thus, measures need to be taken to maintain the pipe at this position to ensure the water delivery capacity of the pipe; otherwise, it indicates that the average amplitude at the current position normally fluctuates within a small range, and it is determined that the pipe at the current position is undamaged.

[0065] For example, preferably, in the third embodiment of the present application, the step of preliminarily determining the health condition of the current position in the pipe under test according to the size of the pressure difference value and the first fluctuation value and / or the second fluctuation value in the step 31 can include: when the pressure difference value between the pressure at the current position in the pipe under test and the pressure error threshold is greater than the first fluctuation value and less than the second fluctuation value, it is preliminarily determined that the pipe at the current position is undamaged.

[0066] The step of further determining the health condition of the current position in the pipe under test according to the size of the amplitude difference value and the third fluctuation value in the step 32 can include: when the amplitude difference value obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipe at the current position has a convex or concave deformation, or has a phenomenon of accumulation of foreign matter caused by peeling of the pipe lining; otherwise, it is determined that the pipe at the current position is undamaged.

[0067] For example, preferably, in one embodiment of the present application:

[0068] When 0.1F0<F-bF0<0.3F0, it indicates that the pressure at the current position in the pipe under test increases slightly, which can be caused by a decrease in water consumption of the end user of the water supply network, and the water pressure normally fluctuates, preliminarily determining that the pipe at the current position is undamaged, and the specific situation needs to be further determined in combination with the average amplitude data;

[0069] When A-aA0≥ 0.1A0, the average amplitude increases, indicating that the pipe at this position has a convex or concave deformation, or has a phenomenon of accumulation of foreign matter caused by peeling of the pipe lining, so that maintenance personnel can be dispatched in time to maintain the pipe, avoiding danger; otherwise, it indicates that the average amplitude at the current position normally fluctuates within a small range, and it is determined that the pipe at the current position is undamaged.

[0070] For example, preferably, in another embodiment of the present application:

[0071] When 0.1F0<bF0-F<0.3F0, the pressure of the pipe at this position decreases slightly, which can be caused by an increase in the diameter of the water supply pipe or an increase in the flow rate of the water in the pipe, and the water pressure normally fluctuates, preliminarily determining that the pipe at the current position is undamaged, and the specific situation needs to be further determined according to the average amplitude data;

[0072] When A-aA0≥ 0.1A0, it indicates that the phenomenon of lining peeling off and foreign matter accumulation in the pipeline may occur at the current position in the pipeline to be measured, thereby causing the hydraulic radius to become smaller, the flow rate to increase, and the pressure to decrease. At this time, measures need to be taken to dredge the pipeline section in a timely manner. Otherwise, it indicates that the average amplitude at the current position normally fluctuates within a small range, and it is determined that the pipeline at the current position is undamaged.

[0073] For example, preferably, in the fourth embodiment of the present application, the step 31 of preliminarily determining the health condition of the current position in the pipeline to be measured according to the size of the pressure difference value and the preset first fluctuation value and / or the second fluctuation value can include: when the pressure difference value obtained by subtracting the pressure error threshold value from the pressure at the current position in the pipeline to be measured is greater than or equal to the second fluctuation value, it is preliminarily determined that the pipeline at the current position has a leakage phenomenon, or the water pump stops water supply;

[0074] The step 32 of further determining the health condition of the current position in the pipeline to be measured according to the size of the amplitude difference value and the preset third fluctuation value can include: when the amplitude difference value obtained by subtracting the average amplitude error threshold value from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the water pump stops water supply; when the amplitude difference value obtained by subtracting the average amplitude of the electromagnetic wave at the current position from the average amplitude error threshold value is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a leakage phenomenon; otherwise, it is determined that the pipeline at the current position is undamaged.

[0075] Preferably, as an example, in one specific embodiment of the present application:

[0076] When bF0-F≥ 0.3F0, it indicates that the pressure at the current position in the pipeline to be measured is greatly reduced, or even negative pressure is generated. If this phenomenon occurs accidentally, it may be due to the water pump stopping water supply. However, when the low pressure state lasts for a long time, it may be that a pipeline leakage phenomenon occurs, and the specific situation needs to be further determined according to the amplitude data.

[0077] When A-aA0≥ 0.1A0, it indicates that protrusion or indentation deformation occurs in the pipeline section, and it is not a pipeline leakage phenomenon. Therefore, it can be determined that the pressure reduction is due to the water pump stopping water supply. At this time, measures need to be taken to maintain the pipeline section to avoid the occurrence of leakage and other phenomena. When aA0-A≥ 0.1A0, it indicates that the average amplitude is reduced, and it can be determined that a leakage phenomenon occurs at the current position in the pipeline to be measured. Personnel need to be dispatched for emergency maintenance. Otherwise, it indicates that the average amplitude at the current position normally fluctuates within a small range, and it is determined that the pipeline at the current position is undamaged.

[0078] In addition, in a preferred embodiment of the present application, the pipeline monitoring method can further comprise: outputting a phase-amplitude / pressure image according to the position data, the pressure data and the electromagnetic wave data reflected by the pipe wall at the plurality of positions in the pipeline obtained by the detector.

[0079] In the technical scheme of the present application, since the detector emits electromagnetic waves at preset time intervals in the pipeline to be detected and simultaneously obtains the position data, the pressure data and the electromagnetic wave data reflected by the pipe wall at the current position, the position data, the pressure data and the electromagnetic wave data reflected by the pipe wall at a plurality of positions in the pipeline to be detected can be obtained as the detector floats downstream in the pipeline to be detected, so that a phase-amplitude / pressure image can be output, wherein the phase can reflect the position of a certain cross section in the pipeline to be detected, and the amplitude and the pressure respectively reflect the average amplitude and the pressure data of the corresponding electromagnetic wave at the cross section.

[0080] In addition, the pressure data can be further reflected by the pressure head, so as to obtain a phase-amplitude / pressure head image.

[0081] For example, in a specific embodiment of the present application, when a DN1000 cast iron water pipeline is monitored, an echo signal image of the current position in the normal pipeline can be obtained (at this time, the average amplitude F0=0.42), as shown in FIG. 2; and a phase-amplitude / pressure head image can be further obtained according to the position data, the pressure data and the electromagnetic wave data reflected by the pipe wall at a plurality of positions in the normal pipeline, as shown in FIG. 3. Figure 6 Figure 7

[0082] Taking the error coefficient a as 1.0 and the error coefficient b as 1.0, it is assumed that in the phase-amplitude / pressure head image, the average amplitude and the pressure head at a certain position are both greatly reduced, as shown in FIG. 4, the water pressure and the average amplitude at the position satisfy the judgment condition of bF0-F≥0.3F0 and aA0-A≥0.1A0, so it can be determined that the pipeline at the position has a leakage phenomenon, so that maintenance measures can be taken in time. Figure 8

[0083] It is assumed that in the phase-amplitude / pressure head image, the pressure head at a certain position is slightly reduced, and the average amplitude is slightly fluctuated, as shown in FIG. 5, at this time, the water pressure and the amplitude at the position respectively satisfy the judgment condition of 0.1F0 Figure 9

[0084] ​​​​In summary, in the pipeline monitoring method, the average amplitude of the reflected electromagnetic wave and the pressure are combined to determine the health of the pipeline, which can realize accurate monitoring of the pipeline. Further, the monitoring process does not affect the daily use of the pipeline, does not require additional construction such as excavation and drainage, causes little damage to the pipeline, and is convenient to monitor without expensive equipment, and has low requirements for personnel operating ability and technical requirements, thereby reducing the operation and maintenance cost. The abnormal condition of the pipeline can be found in time, so that the pipeline problem can be handled in time or in advance to prevent the pipeline from being seriously damaged due to delayed repair and cause loss of manpower and resources.

[0085] In addition, the present application also provides a pipeline monitoring system, as shown in Figure 10 , comprising: at least one detector 1 and a processing module 3;

[0086] The detector 1 is arranged in the pipeline to be detected and floats downstream in the liquid in the pipeline to be detected; the detector is used to emit electromagnetic waves in the pipeline cross section at the current position at a preset time interval, and obtain position data, pressure data and electromagnetic wave data reflected by the pipe wall at the current position;

[0087] The processing module 3 is used to obtain the average amplitude of the electromagnetic wave at the current position according to the obtained electromagnetic wave data, and determine the health condition of the pipeline at the current position according to the average amplitude of the electromagnetic wave at the current position, the pressure data and the preset error threshold.

[0088] In the technical scheme of the present application, a variety of implementation methods can be used to realize the above-mentioned pipeline monitoring system. The following will take several implementation modes as an example to introduce the technical scheme of the present application in detail.

[0089] For example, preferably, in one specific embodiment of the present application, referring to Figure 2 and Figure 10 , the pipeline monitoring system can further comprise a plurality of wireless data receiving units 2, which are arranged at a preset distance apart from the side of the pipeline to be detected, and are used to receive the position data, pressure data and electromagnetic wave data emitted by the detector 1, and transmit the position data, pressure data and electromagnetic wave data as signal data to the processing module 3.

[0090] For another example, preferably, in one specific embodiment of the present application, as shown in Figure 10 , the pipeline monitoring system can further comprise a display module 4, which further comprises: a warning unit 41 and a maintenance display unit 42;

[0091] The warning unit 41 is used to issue a pipeline abnormality alarm according to the health condition of the pipeline;

[0092] The maintenance display unit 42 is used to display the specific position of the abnormal pipe section and the specific problem occurred according to the health condition of the pipe.

[0093] In the technical scheme of the present application, by setting the early warning unit and the maintenance display unit, the pipe health condition determined by the processing module can be directly displayed. For example, when a certain position of the pipe to be measured has problems such as concave or convex, the early warning unit can issue a risk warning to alert the staff that there is an abnormality at this position, so that the staff can repair in advance; at the same time, the maintenance display unit displays the specific position and the specific problem (such as concave or convex) existing at the position, so as to facilitate the positioning and maintenance of the corresponding abnormal pipe section by the staff.

[0094] In addition, in a preferred embodiment of the present application, the maintenance display unit 42 can also be used to display the echo signal image of the current position of the pipe to be measured and the phase-amplitude / pressure image or phase-amplitude / pressure head image of the pipe to be measured.

[0095] In addition, preferably, in a specific embodiment of the present application, as shown in Figure 2 The electromagnetic wave transmitting and receiving device 12, the pressure sensor 11 and the GPS device 13 can be further arranged on the detector 1.

[0096] The electromagnetic wave transmitting and receiving device 12 is used to transmit electromagnetic waves and receive electromagnetic wave data reflected by the pipe wall.

[0097] The pressure sensor 11 is used to acquire pressure data in the pipe in real time.

[0098] The GPS device 13 is used to acquire position data of the detector 1 in real time.

[0099] In summary, in the pipe monitoring system provided by the present application, the average amplitude and pressure of the reflected electromagnetic waves are combined to judge the sub-health condition of the pipe, which can realize accurate monitoring of the pipe. Further, the monitoring process does not affect the daily use of the pipe, does not require additional construction such as excavation and drainage, has little damage to the pipe, and the monitoring method is convenient, does not require expensive equipment, and has low requirements on the operation ability and technical requirements of the personnel, thereby reducing the operation and maintenance cost. By setting the comprehensive display module, the abnormal condition of the pipe can be found in time, so that the pipe problem can be handled in time or in advance, to prevent the pipe from being seriously damaged due to delayed maintenance and causing loss of manpower and material resources.

[0100] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pipeline monitoring method, characterized in that, Includes the following steps: At least one detector is placed in the pipe to be tested, and the detector is made to float downstream in the liquid in the pipe to be tested; The detector emits electromagnetic waves in the cross-section of the pipe at the current location at preset time intervals, and acquires the position data, pressure data and electromagnetic wave data reflected by the pipe wall at the current location. The average amplitude of the electromagnetic wave at the current location is obtained based on the acquired electromagnetic wave data. Based on the average amplitude of the electromagnetic wave at the current location, pressure data, and a preset error threshold, the health status of the pipeline under test at the current location is determined. The preset error thresholds include a pressure error threshold and an average amplitude error threshold; wherein, the pressure error threshold is the product of the pressure data measured in a normal pipeline and a preset pressure error coefficient; the average amplitude error threshold is the product of the average amplitude of the electromagnetic wave measured in a normal pipeline and a preset amplitude error coefficient. The process of determining the health status of the pipeline at its current location based on the average amplitude of the electromagnetic wave, pressure data, and a preset error threshold includes: Calculate the pressure difference between the pressure at the current location in the pipeline under test and the pressure error threshold. Based on the pressure difference and the magnitude of the preset first fluctuation value and / or second fluctuation value, preliminarily determine the health status at the current location in the pipeline under test. The amplitude difference between the average amplitude of the electromagnetic wave at the current location in the pipeline under test and the average amplitude error threshold is calculated. Based on the amplitude difference and the magnitude of the preset third fluctuation value, the health status at the current location in the pipeline under test is further determined.

2. The pipeline monitoring method according to claim 1, characterized in that, The preliminary determination of the health status of the current position in the pipeline under test based on the pressure difference and the preset first fluctuation value and / or second fluctuation value includes: when the pressure difference obtained by subtracting the pressure error threshold from the pressure at the current position in the pipeline under test is greater than or equal to the second fluctuation value, it is preliminarily determined that water hammer has occurred at the current position, or that the pipeline at the current position has a bulge or a depression. The step of further determining the health status of the current position in the pipeline under test based on the amplitude difference and the preset third fluctuation value includes: when the amplitude difference obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a bulge or depression; otherwise, it is determined that water hammer has occurred at the current position and the pipeline is undamaged.

3. The pipeline monitoring method according to claim 1, characterized in that, The step of preliminarily determining the health status of the current position in the pipeline under test based on the pressure difference and the magnitude of the preset first fluctuation value and / or second fluctuation value includes: when the pressure difference between the current position in the pipeline under test and the pressure error threshold is less than or equal to the first fluctuation value, it is preliminarily determined that the pipeline at the current position is undamaged. The step of further determining the health status of the current position in the pipeline under test based on the amplitude difference and the preset third fluctuation value includes: when the amplitude difference obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a bulge or depression; otherwise, it is determined that the pipeline at the current position is undamaged.

4. The pipeline monitoring method according to claim 1, characterized in that, The step of preliminarily determining the health status of the current position in the pipeline under test based on the pressure difference and the preset first fluctuation value and / or second fluctuation value includes: when the pressure difference between the pressure at the current position in the pipeline under test and the pressure error threshold is greater than the first fluctuation value and less than the second fluctuation value, it is preliminarily determined that the pipeline at the current position is undamaged. The step of further determining the health status of the current position in the pipeline under test based on the amplitude difference and the preset third fluctuation value includes: when the amplitude difference obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current position is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current position has a bulge or depression, or that there is a phenomenon of foreign matter accumulation due to peeling off of the pipeline lining; otherwise, it is determined that the pipeline at the current position is undamaged.

5. The pipeline monitoring method according to claim 1, characterized in that, The preliminary determination of the health status of the current position in the pipeline under test based on the pressure difference and the preset first fluctuation value and / or second fluctuation value includes: when the pressure difference obtained by subtracting the pressure at the current position in the pipeline under test from the pressure error threshold is greater than or equal to the second fluctuation value, it is preliminarily determined that there is a leakage in the pipeline at the current position, or that the water pump has stopped supplying water. The step of further determining the health status of the current location in the pipeline under test based on the amplitude difference and the preset third fluctuation value includes: when the amplitude difference obtained by subtracting the average amplitude error threshold from the average amplitude of the electromagnetic wave at the current location is greater than or equal to the third fluctuation value, it is determined that the water pump has stopped supplying water; when the amplitude difference obtained by subtracting the average amplitude of the electromagnetic wave at the current location from the average amplitude error threshold is greater than or equal to the third fluctuation value, it is determined that the pipeline at the current location has leaked; otherwise, it is determined that the pipeline at the current location is undamaged.

6. A pipeline monitoring system, characterized in that, include: At least one detector and processing module; The detector is installed in the pipe to be tested and floats downstream in the liquid inside the pipe. The detector is used to emit electromagnetic waves in the cross section of the pipe at the current position at a preset time interval, and to acquire position data, pressure data and electromagnetic wave data reflected by the pipe wall at the current position. The processing module is used to obtain the average amplitude of the electromagnetic wave at the current location based on the acquired electromagnetic wave data, and to determine the health status of the pipeline under test at the current location based on the average amplitude of the electromagnetic wave at the current location, pressure data, and a preset error threshold. The preset error thresholds include a pressure error threshold and an average amplitude error threshold; wherein, the pressure error threshold is the product of the pressure data measured in a normal pipeline and a preset pressure error coefficient; the average amplitude error threshold is the product of the average amplitude of the electromagnetic wave measured in a normal pipeline and a preset amplitude error coefficient. The process of determining the health status of the pipeline at its current location based on the average amplitude of the electromagnetic wave, pressure data, and a preset error threshold includes: Calculate the pressure difference between the pressure at the current location in the pipeline under test and the pressure error threshold. Based on the pressure difference and the magnitude of the preset first fluctuation value and / or second fluctuation value, preliminarily determine the health status at the current location in the pipeline under test. The amplitude difference between the average amplitude of the electromagnetic wave at the current location in the pipeline under test and the average amplitude error threshold is calculated. Based on the amplitude difference and the magnitude of the preset third fluctuation value, the health status at the current location in the pipeline under test is further determined.

7. The pipeline monitoring system according to claim 6, characterized in that, The pipeline monitoring system also includes multiple wireless data receiving units, which are set at a preset distance on the side of the pipeline to be monitored. These units are used to receive position data, pressure data, and electromagnetic wave data emitted by the detector, and transmit the position data, pressure data, and electromagnetic wave data as signal data to the processing module.

8. The pipeline monitoring system according to claim 6, characterized in that, The pipeline monitoring system also includes a display module, which further includes an early warning unit and a maintenance display unit; The early warning unit is used to issue an abnormal pipeline alarm based on the pipeline's health status; The maintenance display unit is used to display the specific location and problem of abnormal pipe sections based on the health status of the pipeline.

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