Buried water pipeline leakage monitoring system and method

Abstract

The invention relates to the field of water pipe leakage monitoring, and discloses a buried water pipe leakage monitoring system and method, and the system comprises a monitoring module and a data collection module which is used for collecting data and transmitting the data to a monitoring platform; the leakage data processing and analyzing module is used for processing the data of the monitoring platform to obtain a leakage coefficient and an environment compensation coefficient respectively, calculating a leakage evaluation index of each water conveying pipe according to the leakage coefficient and the environment compensation coefficient, comparing the leakage evaluation index with a leakage threshold interval, and determining the leakage value of each water conveying pipe; if the leakage evaluation index exceeds the leakage threshold value interval, it is judged that leakage exists in the current water conveying pipe, if the leakage evaluation index is located in the leakage threshold value interval, it is judged that the leakage state of the current water conveying pipe is undetermined and needs to be further checked, and if the leakage evaluation index is lower than the leakage threshold value interval, it is judged that the state of the water conveying pipe is safe; and finally, according to a judgment result of the leakage data processing and analyzing module, alarm is automatically triggered and related personnel are notified.

Description

Technical Field

[0001] The invention relates to the field of water pipe leakage monitoring, and in particular to a buried water pipeline leakage monitoring system and method. Background Art

[0002] As the main mode of transportation for urban water supply and industrial water, the safety and reliability of buried water pipelines are of vital importance. However, due to various reasons, such as pipe aging, foundation subsidence, internal medium and external soil corrosion, ground load, poor construction, etc., pipelines often have micropores, small holes or cracks, leading to water leakage. If not discovered and repaired in time, the leaking holes will gradually expand, which will not only cause a huge waste of water resources, but also may cause safety accidents, affecting residents' lives and industrial production.

[0003] At present, the main methods for leak detection in water pipelines are acoustic leak detection and boost leak detection. The acoustic leak detection method uses sensors to capture leaking sound waves to determine the location of the leak, but it is easily affected by the shape and size of the collapsed gap at the leak point, as well as the material, diameter of the pipeline and the surrounding medium, resulting in inaccurate judgment. The boost leak detection method detects leaks by increasing the pressure in the pipeline, but this method may cause additional pressure on the pipeline and affect its service life. In addition, most of the existing leak detection methods require manual equipment to be carried to the site for detection. Not only is the detection cycle long, but it is also impossible to monitor pipeline leakage in real time. An alarm can only be issued when there is a leak with excessive flow in the pipeline, resulting in the inability to issue an alarm quickly. In addition, because the existing pipeline alarm device has a single function, it is impossible to issue an alarm of the corresponding level according to the leakage situation, which in turn affects the efficiency of the alarm.

[0004] Therefore, developing a system that can monitor the leakage of buried water pipelines in real time is of great significance for timely discovering and repairing leakage points, reducing water waste, and ensuring water supply safety. Summary of the invention

[0005] The purpose of the present invention is to provide a buried water pipeline leakage monitoring system and method to solve the technical problems of the existing water pipeline leakage detection, such as long detection cycle and inability to monitor pipeline leakage in real time.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A buried water pipeline leakage monitoring system, comprising:

[0008] Monitoring module, a set of leakage sensors and environmental monitoring sensors are arranged outside the water pipe;

[0009] A data acquisition module is used to collect data from the monitoring module and transmit it to the monitoring platform via wired or wireless communication;

[0010] The leakage data processing and analysis module is used to process the data of the monitoring platform, obtain the leakage coefficient and the environmental compensation coefficient respectively, calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient, and compare the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is judged that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is judged that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is judged that the water pipe is safe.

[0011] The alarm and notification module automatically triggers an alarm when a leak is detected, selects the appropriate alarm method based on the leak level, and notifies relevant personnel;

[0012] The steps for making corresponding alarms according to the leakage level are as follows:

[0013] First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference;

[0014] Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range;

[0015] If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm;

[0016] If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound;

[0017] If the leakage assessment difference / the average of historical leakage assessment indicators is lower than the difference range, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm.

[0018] As a further technical solution, the process of further investigation is as follows:

[0019] After marking the pending water pipe, the water pressure of the water pipe is maintained at n test water pressures, and the test water pressure is lower than the maximum water pressure that the water pipe can withstand;

[0020] The water pressure of the water pipe is increased from small to large in sequence to the detection water pressure and then maintained for a unit time, and a curve of the water pressure changing with time within the unit time is obtained;

[0021] By formula:

[0022] The abnormal evaluation index Q is calculated;

[0023] Where n is the number of water pressure tests in the water pipe, o is the oth water pressure test, t u ~t u+1 is the unit time, P oth (t) is the curve of the change of rated water pressure over time, P os (t) is the curve of actual water pressure changing with time, P osmax is the maximum value of the oth detected water pressure within a unit time, P osmin It is the minimum value of the oth detected water pressure within a unit time.

[0024] As a further technical solution, the calculated abnormal evaluation index Q is compared with the preset abnormal threshold Q th Compare;

[0025] If Q ≥ Q th , then it is judged that the current water pipe is abnormal and there is a risk of leakage;

[0026] If Q th , it is judged that the current water pipe is normal and there is no risk of leakage.

[0027] As a further technical solution, the process of obtaining the leakage coefficient is:

[0028] Get each leakage parameter e i , through the formula Calculate the reference value e of each leakage parameter ic ; Each leakage parameter e i and the corresponding reference value e ic Substitute the following formula:

[0029]

[0030] Calculate the leakage coefficient F of the current water pipe;

[0031] Among them, γ is the reference coefficient, ω i is the weight coefficient corresponding to the i-th leakage parameter, N is the total number of leakage parameters, and when there is at least one e i ≥e i0 When f(e i , e i0 )=1 / μ*k, otherwise f(e i , e i0 )=0, k is the value that satisfies e i ≥e i0 The number of items, μ is the preset coefficient.

[0032] As a further technical solution, the process of obtaining the environmental compensation coefficient LRI is:

[0033] The real-time soil moisture around the current water pipe will be detected and obtained​i , soil temperature T i , Environmental noise Z i Substitute the following formula:

[0034]

[0035]

[0036] Calculate and obtain the environmental compensation coefficient LRI of the current water pipeline;

[0037] Where, j is the jth sampling time point, M is the total number of sampling times, are the mean values ​​of soil moisture, soil temperature and environmental noise respectively, σ1, σ2 and σ3 are conversion coefficients, θ j is the soil moisture at the jth sampling time point, T j is the soil temperature at the jth sampling time point;

[0038] τT, τθ, τZ are the standard deviations of soil temperature, soil moisture and environmental noise, respectively. is the preset weight coefficient.

[0039] As a further technical solution, the process of obtaining the leakage assessment index is:

[0040] By formula:

[0041]

[0042] Calculate the leakage assessment index g of the current water pipe;

[0043] Among them, LRI th is the reference value of the environmental compensation coefficient, F th It is the reference value of leakage coefficient.

[0044] As a further technical solution, the method of notifying relevant personnel includes sound, light, text message and email.

[0045] A method for monitoring leakage of an underground water pipeline comprises the following steps:

[0046] S1. Arrange a group of leakage sensors and environmental monitoring sensors outside the water pipe;

[0047] S2, collecting data from leakage sensors and environmental monitoring sensors, and transmitting them to the monitoring platform via wired or wireless communication;

[0048] S3. Process the data from the monitoring platform to obtain the leakage coefficient and the environmental compensation coefficient, and calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient;

[0049] S4, comparing the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is determined that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is determined that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is determined that the water pipe is safe.

[0050] S5. When it is determined that there is leakage, the alarm is automatically triggered, the corresponding alarm method is selected according to the leakage level, and the relevant personnel are notified;

[0051] The steps for making corresponding alarms according to the leakage level are as follows:

[0052] First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference;

[0053] Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range;

[0054] If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm;

[0055] If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound;

[0056] If the leakage assessment difference / the average of historical leakage assessment indicators is lower than the difference range, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm.

[0057] Beneficial effects of the present invention:

[0058] (1) The present invention can monitor the leakage of the pipeline and its influence by environmental factors in real time by arranging leakage sensors and environmental monitoring sensors on the outside of the water pipe. Once abnormal leakage is detected, the system will immediately trigger an alarm, effectively reducing the waste of water resources and environmental pollution risks caused by leakage. By comparing the leakage situation in a preset manner in advance and dividing the assessed leakage level according to the comparison results, on the one hand, leakage can be detected in real time, and on the other hand, a corresponding alarm method can be issued according to the leakage level. Then, the leakage alarm in the control room can issue an alarm of the corresponding level by means of a red alarm accompanied by an alarm sound, an orange alarm and a yellow alarm, so that the staff can directly obtain the leakage assessment situation through the leakage alarm, which is concise and clear.

[0059] (2) The present invention can accurately calculate the leakage coefficient and environmental compensation coefficient through the leakage data processing and analysis module, and then obtain the leakage assessment index, and compare it with the preset leakage threshold range, providing management personnel with a scientific and accurate decision-making basis and avoiding unnecessary maintenance and replacement costs; at the same time, the entire monitoring system realizes the intelligence and automation of data collection, processing, analysis and alarm notification, which greatly improves work efficiency, reduces manual intervention, and reduces operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] Figure 1 It is a system structure block diagram of the present invention;

[0062] Figure 2 It is a diagram of the method steps of the present invention. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] See also Figure 1-Figure 2 As shown, the present invention is a buried water pipeline leakage monitoring system, comprising:

[0065] Monitoring module, a set of leakage sensors and environmental monitoring sensors are arranged outside the water pipe;

[0066] A data acquisition module is used to collect data from the monitoring module and transmit it to the monitoring platform via wired or wireless communication;

[0067] The leakage data processing and analysis module is used to process the data of the monitoring platform, obtain the leakage coefficient and the environmental compensation coefficient respectively, calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient, and compare the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is judged that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is judged that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is judged that the water pipe is safe.

[0068] The alarm and notification module automatically triggers an alarm when a leak is detected, selects the appropriate alarm method based on the leak level, and notifies relevant personnel;

[0069] The steps for making corresponding alarms according to the leakage level are as follows:

[0070] First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference;

[0071] Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range;

[0072] If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm;

[0073] If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound;

[0074] If the leakage assessment difference / historical leakage assessment index average is lower than the difference interval, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm;

[0075] The methods of notifying relevant personnel include through sound, light, text message and email.

[0076] By comparing the leakage conditions in a preset manner in advance and dividing the assessed leakage levels according to the comparison results, on the one hand, leakage can be detected in real time, and on the other hand, a corresponding alarm method can be issued according to the leakage level. Then, the leakage alarm in the control room will sound a red alarm accompanied by an alarm sound, an orange alarm and a yellow alarm will sound an alarm of the corresponding level, allowing the staff to directly learn the leakage assessment situation through the leakage alarm, which is concise and clear.

[0077] The further investigation process is as follows:

[0078] After marking the pending water pipe, the water pressure of the water pipe is maintained at b test water pressure, and the test water pressure is lower than the maximum water pressure that the water pipe can withstand;

[0079] The water pressure of the water pipe is increased from small to large in sequence to the detection water pressure and then maintained for a unit time, and a curve of the water pressure changing with time within the unit time is obtained;

[0080] By formula:

[0081] The abnormal evaluation index Q is calculated;

[0082] Where n is the number of water pressure tests in the water pipe, o is the oth water pressure test, t u ~t u+1 is the unit time, P oth(t) is the curve of the change of rated water pressure over time, P os (t) is the curve of actual water pressure changing with time, P osmax is the maximum value of the oth detected water pressure within a unit time, P osmin It is the minimum value of the oth detected water pressure within a unit time.

[0083] The calculated anomaly evaluation index Q is compared with the preset anomaly threshold Q th Compare;

[0084] If Q ≥ Q th , then it is judged that the current water pipe is abnormal and there is a risk of leakage;

[0085] If Q th , it is judged that the current water pipe is normal and there is no risk of leakage.

[0086] In this embodiment, by arranging leakage sensors and environmental monitoring sensors outside the water pipe, the leakage of the pipeline and its influence by environmental factors can be monitored in real time. Once abnormal leakage is detected, the system will immediately trigger an alarm, effectively reducing the waste of water resources and environmental pollution risks caused by leakage; and then through the leakage data processing and analysis module, the leakage coefficient and environmental compensation coefficient can be accurately calculated, and then the leakage assessment index can be obtained, and compared with the preset leakage threshold interval, providing management personnel with a scientific and accurate decision-making basis, avoiding unnecessary maintenance and replacement costs; at the same time, the entire monitoring system realizes the intelligence and automation of data collection, processing, analysis and alarm notification, greatly improving work efficiency, reducing manual intervention, and reducing operation and maintenance costs;

[0087] In order to reduce the monitoring error caused by real-time monitoring, a further investigation method is set up. Specifically, a water pressure test is used for water pipes that may have leakage risks. The water pressure of the water pipe is increased from small to large to the detection water pressure and maintained for a unit time, and the curve of the water pressure change over time in the unit time is obtained; then the formula is used: The abnormal evaluation index Q is calculated; through the above calculation process, the abnormal evaluation of the water pipe in the state to be determined can be performed. The evaluation method is to use the cumulative change and range P osmax -P osmin A comprehensive evaluation is performed to determine whether there is leakage in the current water pipe according to the difference between the rated water pressure and the actual water pressure. The larger the value is, the larger the abnormal evaluation index Q is, and the higher the probability of leakage in the current water pipe is. osmax -P osmin ​The larger it is, the larger the abnormality assessment index Q is, and the higher the probability that there is leakage in the current water pipe. Therefore, the current water pipe abnormality is accurately assessed through the above-mentioned cumulative change and maximum change amplitude, thereby improving the accuracy of leakage judgment.

[0088] The process of obtaining the leakage coefficient is:

[0089] Get each leakage parameter e i , through the formula Calculate the reference value e of each leakage parameter ic ; Each leakage parameter e i and the corresponding reference value e ic Substitute the following formula:

[0090]

[0091] Calculate the leakage coefficient F of the current water pipe;

[0092] Among them, γ is the reference coefficient, ω i is the weight coefficient corresponding to the i-th leakage parameter, N is the total number of leakage parameters, and when there is at least one e i ≥e i0 When f(e i , e i0 )=1 / μ*k, otherwise f(e i , e i0 )=0, k is the value that satisfies e i ≥e i0 The number of items, μ is the preset coefficient.

[0093] In this embodiment, a method for obtaining the leakage coefficient of each water pipe is provided. First, leakage parameters including pressure, acoustic signal intensity, acoustic frequency and conductivity are obtained based on detection. The acquisition method and installation method adopt the existing technology. Then, the above parameters are substituted into the formula The leakage coefficient F of the current water pipe is calculated; obviously, the larger the leakage coefficient F is, the higher the probability of water pipe leakage is. The larger the value is, the greater the ratio between a leakage parameter and the corresponding reference value is, and the more abnormal it is. The ratio between multiple leakage parameters and the reference value is obtained by multiplication to achieve the purpose of reflecting the slight changes in each leakage parameter and improve the sensitivity of the leakage coefficient.

[0094] The process of obtaining the environmental compensation coefficient LRI is as follows:

[0095] The real-time soil moisture around the current water pipe will be detected and obtained i , soil temperature T i , Environmental noise Z i Substitute the following formula:

[0096]

[0097]

[0098] Calculate and obtain the environmental compensation coefficient LRI of the current water pipeline;

[0099] Where, j is the jth sampling time point, M is the total number of sampling times, are the mean values ​​of soil moisture, soil temperature and environmental noise respectively, σ1, σ2 and σ3 are conversion coefficients, θ j is the soil moisture at the jth sampling time point, T j is the soil temperature at the jth sampling time point;

[0100] TT, τθ, τZ are the standard deviations of soil temperature, soil moisture and environmental noise, respectively. is the preset weight coefficient.

[0101] In this embodiment, a method for obtaining the environmental compensation coefficient of a water pipe is provided. Specifically, the real-time soil moisture θ around the current water pipe is first detected and obtained. i , soil temperature T i , Environmental noise Z i Substitute the following formula: Among them The environmental compensation coefficient LRI of the current water pipe is calculated. It can be seen that the greater the volatility of soil temperature and soil moisture, the more unstable the environment is, and the greater the impact on the leakage assessment index. Conversely, the smaller the impact is, which further improves the accuracy of the leakage assessment index.

[0102] The process of obtaining the leakage assessment index is as follows:

[0103] By formula:

[0104]

[0105] Calculate the leakage assessment index g of the current water pipe;

[0106] Among them, LRI th is the reference value of the environmental compensation coefficient, F th It is the reference value of leakage coefficient.

[0107] In this embodiment, the two parameters of comprehensive environmental compensation coefficient and leakage coefficient are comprehensively analyzed to establish a leakage assessment model for the water pipe, avoiding the leakage monitoring error caused by single detection and ignoring environmental factors, and giving a specific expression It can be seen that the larger the environmental compensation coefficient and the leakage coefficient, the larger the leakage assessment index, indicating that the leakage probability of the water pipe is higher, and vice versa. The above technical solution achieves the purpose of rapid and accurate evaluation of water pipe leakage monitoring, and enhances the leakage monitoring performance of existing buried water pipes.

[0108] A method for monitoring leakage of an underground water pipeline comprises the following steps:

[0109] S1. Arrange a group of leakage sensors and environmental monitoring sensors outside the water pipe;

[0110] S2, collecting data from leakage sensors and environmental monitoring sensors, and transmitting them to the monitoring platform via wired or wireless communication;

[0111] S3. Process the data from the monitoring platform to obtain the leakage coefficient and the environmental compensation coefficient, and calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient;

[0112] S4, comparing the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is determined that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is determined that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is determined that the water pipe is safe.

[0113] S5. When it is determined that there is leakage, the alarm is automatically triggered, the corresponding alarm method is selected according to the leakage level, and the relevant personnel are notified;

[0114] The steps for making corresponding alarms according to the leakage level are as follows:

[0115] First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference;

[0116] Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range;

[0117] If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm;

[0118] If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound;

[0119] If the leakage assessment difference / the average of historical leakage assessment indicators is lower than the difference range, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm.

[0120] It should be noted that the calculation formulas and various parameters involved in the calculations in the present invention have been dimensionally processed in advance, and the process of dimensionless processing is well known in the industry and will not be described here.

[0121] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A buried water pipeline leakage monitoring system, characterized in that: include: Monitoring module, a set of leakage sensors and environmental monitoring sensors are arranged outside the water pipe; A data acquisition module is used to collect data from the monitoring module and transmit it to the monitoring platform via wired or wireless communication; The leakage data processing and analysis module is used to process the data of the monitoring platform, obtain the leakage coefficient and the environmental compensation coefficient respectively, calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient, and compare the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is judged that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is judged that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is judged that the water pipe is safe. The alarm and notification module automatically triggers an alarm when a leak is detected, selects the appropriate alarm method based on the leak level, and notifies relevant personnel; The steps for making corresponding alarms according to the leakage level are as follows: First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference; Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range; If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm; If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound; If the leakage assessment difference / the average of historical leakage assessment indicators is lower than the difference range, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm.

2. The buried water pipeline leakage monitoring system according to claim 1, characterized in that: The further investigation process is as follows: After marking the pending water pipe, the water pressure of the water pipe is maintained at n test water pressures, and the test water pressure is lower than the maximum water pressure that the water pipe can withstand; The water pressure of the water pipe is increased from small to large in sequence to the detection water pressure and then maintained for a unit time, and a curve of the water pressure changing with time within the unit time is obtained; By formula: The abnormal evaluation index Q is calculated; Where n is the number of water pressure tests in the water pipe, o is the oth water pressure test, t u ~t u+1 is the unit time, P oth (t) is the curve of the change of rated water pressure over time, P os (t) is the curve of actual water pressure changing with time, P osmax is the maximum value of the oth detected water pressure within a unit time, P osmin It is the minimum value of the oth detected water pressure within a unit time.

3. The buried water pipeline leakage monitoring system according to claim 2 is characterized in that: The calculated anomaly evaluation index Q is compared with the preset anomaly threshold Q th Compare; If Q ≥ Q th , then it is judged that the current water pipe is abnormal and there is a risk of leakage; If Q<Q th , it is judged that the current water pipe is normal and there is no risk of leakage.

4. The buried water pipeline leakage monitoring system according to claim 1, characterized in that: The process of obtaining the leakage coefficient is: Get each leakage parameter e i , through the formula Calculate the reference value e of each leakage parameter ic ; Each leakage parameter e i and the corresponding reference value e ic Substitute the following formula: Calculate the leakage coefficient F of the current water pipe; Among them, γ is the reference coefficient, ω i is the weight coefficient corresponding to the i-th leakage parameter, N is the total number of leakage parameters, and when there is at least one e i ≥e i0 When f(e i , e i0 )=1 / μ*k, otherwise f(e i , e i0 )=0, k is the value that satisfies e i ≥e i0 is the number of items, and μ is the preset coefficient.

5. The buried water pipeline leakage monitoring system according to claim 4, characterized in that: The process of obtaining the environmental compensation coefficient LRI is as follows: The real-time soil moisture around the current water pipe will be detected and obtained i , soil temperature T i , Environmental noise Z i Substitute the following formula: Calculate and obtain the environmental compensation coefficient LRI of the current water pipeline; Where, j is the jth sampling time point, M is the total number of sampling times, are the mean values ​​of soil moisture, soil temperature and environmental noise respectively, σ1, σ2 and σ3 are conversion coefficients, θ j is the soil moisture at the jth sampling time point, T j is the soil temperature at the jth sampling time point; τT, τθ, τZ are the standard deviations of soil temperature, soil moisture and environmental noise, respectively. is the preset weight coefficient.

6. The buried water pipeline leakage monitoring system according to claim 5, characterized in that: The process of obtaining the leakage assessment index is as follows: By formula: Calculate the leakage assessment index g of the current water pipe; Among them, LRI th is the reference value of the environmental compensation coefficient, F th It is the reference value of leakage coefficient.

7. The buried water pipeline leakage monitoring system according to claim 1, characterized in that: The methods of notifying relevant personnel include through sound, light, text message and email.

8. A method for monitoring leakage of buried water pipelines, characterized in that: The monitoring method is applicable to the buried water pipeline leakage monitoring system according to any one of claims 1 to 7, comprising the following steps: S1. Arrange a group of leakage sensors and environmental monitoring sensors outside the water pipe; S2, collecting data from leakage sensors and environmental monitoring sensors, and transmitting them to the monitoring platform via wired or wireless communication; S3. Process the data from the monitoring platform to obtain the leakage coefficient and the environmental compensation coefficient, and calculate the leakage assessment index of each water pipe according to the leakage coefficient and the environmental compensation coefficient; S4, comparing the leakage assessment index with the pre-set leakage threshold interval. If the leakage assessment index exceeds the leakage threshold interval, it is determined that the current water pipe has leakage. If the leakage assessment index is within the leakage threshold interval, it is determined that the leakage status of the current water pipe is pending and needs further investigation. If the leakage assessment index is lower than the leakage threshold interval, it is determined that the water pipe is safe. S5. When it is determined that there is leakage, the alarm is automatically triggered, the corresponding alarm method is selected according to the leakage level, and the relevant personnel are notified; The steps for making corresponding alarms according to the leakage level are as follows: First, the difference between the leakage assessment index and the maximum value of the leakage threshold interval is obtained, which is recorded as the leakage assessment difference; Secondly, the leakage assessment difference / historical leakage assessment index mean is compared with the preset difference range; If the leakage assessment difference / historical leakage assessment index average falls within the difference range, the assessed seepage level is medium, and an orange alarm is issued through the leakage alarm; If the leakage assessment difference / historical leakage assessment index average exceeds the difference interval, the assessed seepage level is high, and a red alarm is issued through the leakage alarm accompanied by an emergency alarm sound; If the leakage assessment difference / the average of historical leakage assessment indicators is lower than the difference range, the assessed seepage level is low, and a yellow alarm is issued through the leakage alarm; yellow alarm < orange alarm < red alarm.

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