Gas monitoring system and methods

Abstract

This application provides a gas monitoring system, including: a pressure detection module and a remote monitoring platform. The pressure detection module includes at least two absolute pressure sensing units arranged in each gas pipeline to be tested, to monitor the absolute pipeline pressure data of each gas pipeline. The remote monitoring platform receives the absolute pipeline pressure data detected by each absolute pressure sensing unit. The remote monitoring platform also analyzes the absolute pipeline pressure data detected by each absolute pressure sensing unit in the same group according to preset rules, sets a pipeline pressure reference value, and determines that the gas pipeline corresponding to any absolute pressure sensing unit has a leakage risk when the absolute pipeline pressure data detected by any absolute pressure sensing unit is lower than the pipeline pressure reference value, and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold. Through the above settings, the cost of detecting gas leaks is reduced while the accuracy of detection is improved.

Description

TECHNICAL FIELD

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

[0002] With the popularization of gas application, gas has entered ordinary families as the main fuel for heating and cooking. People sometimes forget to close the valve at the outlet of the gas pipeline after using gas or cause gas leakage due to aging of the pipeline itself. If the gas leakage cannot be found and solved in time, it will threaten the safety of people's life and property and cause irreparable loss. In daily life, the relative pressure of the pipeline is usually detected by an intelligent gas meter to determine whether the gas leaks. Specifically, the relative pressure of the pipeline is obtained by installing a differential pressure sensor on the shell of the intelligent gas meter or by installing an absolute pressure sensor in and outside the gas meter to obtain the pressure in the pipeline and the atmospheric pressure, respectively, so as to obtain the difference between the pressure in the pipeline and the atmospheric pressure, that is, the relative pressure of the pipeline. The following problems may occur when the relative pressure of the pipeline is detected by the intelligent gas meter to determine whether the gas leaks: first, the differential pressure sensor installed on the shell of the intelligent gas meter has a very high requirement for the production process of the sensor and the gas meter, and it is difficult to implement. Second, when two absolute pressure sensors are used inside and outside the meter, the cost of the two sensors is relatively high, and the error caused by the two sensors is greater. Third, because the atmospheric pressure changes dynamically and the change range is large, the accuracy of the detected relative pressure of the pipeline is not ideal, causing false negatives or false positives of the gas meter.

[0003] Therefore, it is necessary to provide a technical solution to solve the problems of high cost of detecting gas leakage and low accuracy of detection in the related art. SUMMARY

[0004] The purpose of the present application is to provide a gas monitoring system and method that reduces the cost of detecting gas leakage while improving the accuracy of detection.

[0005] To achieve the above purpose, the present application adopts the following technical solution:

[0006] A gas monitoring system comprises:

[0007] The pressure detection module comprises at least two absolute pressure sensing units, each of which is arranged in a to-be-detected gas pipeline to monitor absolute pipeline pressure data of each to-be-detected gas pipeline. The remote monitoring platform is in communication connection with the pressure detection module and receives the absolute pipeline pressure data detected by each absolute pressure sensing unit. The remote monitoring platform further groups the absolute pressure sensing units according to a preset rule, analyzes the absolute pipeline pressure data detected by each absolute pressure sensing unit in the same group, sets a pipeline pressure reference value, and determines that the gas pipeline corresponding to the absolute pressure sensing unit has a leakage risk when the absolute pipeline pressure data detected by any absolute pressure sensing unit is lower than the pipeline pressure reference value and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold.

[0008] Further, the remote monitoring platform stores network regulator distribution information, and the preset rule comprises grouping the absolute pressure sensing units according to the network regulator distribution information, and grouping the absolute pressure sensing units arranged in different branch gas pipelines under the same regulator into the same group.

[0009] Further, the remote monitoring platform performs mean value processing on the absolute pipeline pressure data detected by each absolute pressure sensing unit in the same group to obtain the pipeline pressure reference value.

[0010] Further, the remote monitoring platform is further used for comparing the pipeline pressure reference values of different groups, the regulators corresponding to each group used for comparison belong to the same regulating area, and the regulating area is divided by the remote monitoring platform according to the network regulator distribution information. When the deviation between the pipeline pressure reference value of any group and the area regulating reference value is greater than a preset regulating threshold, the remote monitoring platform determines that the regulator corresponding to the group is abnormal, wherein the area regulating reference value is set according to the pipeline pressure reference values of the groups used for comparison.

[0011] Further, the remote monitoring platform performs mean value processing on the pipeline pressure reference values of the groups used for comparison to obtain the area regulating reference value.

[0012] Further, the absolute pressure sensing unit is arranged in a gas meter, and the absolute pressure sensing unit is in communication connection with the remote monitoring platform based on a communication unit of the gas meter.

[0013] Further, the gas meter is used for detecting the flow of the to-be-detected gas pipeline and determining the gas use condition according to the detected flow data, the absolute pipeline pressure data detected by the absolute pressure sensing unit is valid when the gas meter determines that the user does not use gas, and the absolute pressure sensing unit uploads the detected valid absolute pipeline pressure data to the remote monitoring platform.

[0014] Furthermore, the gas meter detects the flow rate of the gas pipeline under test. When the flow rate of the gas pipeline under test is lower than the preset flow rate threshold, the gas meter determines that the user has not used gas.

[0015] Furthermore, the remote monitoring platform uses timestamps to mark the generation time of each received absolute pipeline pressure data. When the remote monitoring platform analyzes the absolute pipeline pressure data detected by each absolute pressure sensing unit in the same group, the deviation between the generation times of each absolute pipeline pressure data being analyzed is less than a preset time threshold.

[0016] Furthermore, a gas monitoring method includes the following steps:

[0017] Monitor the absolute pipeline pressure data of each gas pipeline to be tested;

[0018] According to preset rules, the absolute pipeline pressure data are grouped.

[0019] Analyze the absolute pipeline pressure data in the same group, set a pipeline pressure reference value, and determine that the gas pipeline corresponding to the absolute pipeline pressure data has a leakage risk when any absolute pipeline pressure data is lower than the pipeline pressure reference value and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds the preset pressure threshold.

[0020] The gas monitoring system of this application only requires a single absolute pressure sensing unit to be deployed in the gas pipeline under test to determine whether the gas pipeline is leaking, thus reducing the cost of the gas monitoring system and avoiding the cumulative error caused by using multiple absolute pressure sensing units in the gas pipeline under test. In addition, the gas monitoring system of this application makes judgments based on the absolute pipeline pressure data of each gas pipeline, making the judgments more realistic and accurate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the gas monitoring system of this application.

[0022] Figure 2 This is a flowchart illustrating the process of the gas monitoring system in this application for detecting gas pipeline leaks.

[0023] Figure 3 This is a flowchart illustrating the workflow of the gas monitoring system for detecting abnormalities in the pressure regulator.

[0024] Figure 4 This is a schematic diagram of the gas monitoring system for the residential area applied for in this application.

[0025] Figure 5 This is a flowchart illustrating the workflow for obtaining pipeline pressure reference values ​​for the gas monitoring system described in this application.

[0026] Figure 6 This is a flowchart of the gas monitoring method of this application. Detailed Implementation

[0027] The present application will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application. Any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present application.

[0028] like Figure 1 As shown in the figure, an embodiment of this application provides a gas monitoring system 100, including a pressure detection module 11 and a remote monitoring platform 12. The pressure detection module 11 includes at least two absolute pressure sensing units 111, each of which is arranged in a gas pipeline to be tested, to monitor the absolute pipeline pressure data of each gas pipeline. The remote monitoring platform 12 is communicatively connected to the pressure detection module 11, receiving the absolute pipeline pressure data detected by each absolute pressure sensing unit 111. The remote monitoring platform 12 also groups the absolute pressure sensing units 111 according to preset rules, analyzes the absolute pipeline pressure data detected by each absolute pressure sensing unit 111 in the same group, and sets a pipeline pressure reference value. When the absolute pipeline pressure data detected by any absolute pressure sensing unit 111 is lower than the pipeline pressure reference value, and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold, the remote monitoring platform 12 determines that the gas pipeline corresponding to the absolute pressure sensing unit 111 has a leakage risk. The preset pressure threshold can be set according to actual needs; for example, the preset pressure threshold can be set based on experience.

[0029] like Figure 2 As shown, specifically, the process by which the gas monitoring system 100 of this application determines whether there is a leak in the gas pipeline is as follows:

[0030] Step S101: Each absolute pressure sensing unit 111 monitors the absolute pipeline pressure data of each gas pipeline under test;

[0031] Step S102: The remote monitoring platform 12 receives the absolute pipeline pressure data of each pipeline monitored by each absolute pressure sensing unit 111.

[0032] Step S103: The remote monitoring platform 12 groups each absolute pressure sensing unit 111 according to preset rules;

[0033] Step S104: Analyze the absolute pipeline pressure data of each pipeline monitored by each absolute pressure sensing unit 111 in the same group, and set the pipeline pressure reference value.

[0034] Step S105: If the detected absolute pipeline pressure data is lower than the pipeline pressure reference value, obtain the deviation value between the absolute pipeline pressure value of the gas pipeline to be tested and the pipeline pressure reference value.

[0035] Step S106: If the obtained deviation value is greater than the preset pressure threshold, then proceed to step S107; otherwise, proceed to step S108.

[0036] Step S107: Determine if there is a leak in the gas pipeline;

[0037] Step S108: Determine that there is no leak in the gas pipeline.

[0038] Based on the above description, in the gas monitoring system 100 provided in this application embodiment, the remote monitoring platform 12 groups the detected absolute pipeline pressure data when there is no leakage according to preset rules, sets a pipeline pressure reference value based on the absolute pipeline pressure data in the same group, and determines that the pipeline is leaking when the absolute pipeline pressure data of any pipeline is lower than the pipeline pressure reference value and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold. Through the above settings, the pipeline pressure reference value is set based on multiple absolute pipeline pressure data in the same group, thereby eliminating the influence of pressure regulator adjustment on pipeline pressure. Therefore, when determining whether there is a leak, only the absolute pipeline pressure data of each pipeline needs to be obtained (i.e., each gas pipeline under test only needs to be equipped with a single absolute pressure sensing unit 111, without the need to install an additional absolute pressure sensing unit 111 outside the pipeline), reducing the cost of the gas monitoring system 100. It also avoids the accumulation of errors caused by the use of multiple absolute pressure sensing units 111 in the gas pipeline, improving the accuracy of the gas monitoring system 100 in determining the risk of gas pipeline leakage.

[0039] Furthermore, since the gas monitoring system 100 of this application makes judgments based on the absolute pipeline pressure data of each pipeline, the judgments are closer to reality and have high accuracy. At the same time, by setting a preset pressure threshold, the sensitivity of the gas monitoring system 100 can be adjusted. When the preset pressure threshold is set too low, even a slight drop in the measured absolute pipeline pressure data will cause the deviation between the measured absolute pipeline pressure data and the pipeline pressure reference value to exceed the preset pressure threshold, and the gas monitoring system 100 will then determine that a gas pipeline leak has occurred. Therefore, for minor leaks, it is not necessary to wait for the absolute pipeline pressure data to fall significantly below the normal range before making a judgment, resulting in better timeliness and accuracy.

[0040] Based on the above description, the gas monitoring system 100 provided in this application embodiment, through the cooperation of the pressure detection module 11 and the remote monitoring platform 12, judges gas leaks based on the absolute pipeline pressure data of each pipeline, thereby reducing the cost of gas leak detection and improving the accuracy of detection.

[0041] As an optional implementation, the remote monitoring platform 12 stores the distribution information of pipeline pressure regulators. The preset rules include grouping the absolute pressure sensing units 111 according to the distribution information of pipeline pressure regulators, and grouping the absolute pressure sensing units 111 arranged in different branch gas pipelines under the same pressure regulator into the same group.

[0042] Specifically, the pipeline pressure of a branch gas pipeline under the same pressure regulator is affected by that regulator. Therefore, when analyzing whether a gas pipeline is leaking based on absolute pipeline pressure data, the pipeline pressure data of other branch gas pipelines under the same pressure regulator can provide a certain reference for analyzing whether the gas pipeline is leaking. In this embodiment, the absolute pressure sensing units 111 arranged in different branch gas pipelines under the same pressure regulator are grouped into the same group. Thus, the pipeline pressure reference value set based on the absolute pipeline pressure data under the same group is more reliable for judging whether each branch gas pipeline under the pressure regulator is leaking, improving the accuracy of the gas monitoring system 100.

[0043] As an optional implementation, the remote monitoring platform 12 averages the absolute pipeline pressure data detected by each absolute pressure sensing unit 111 in the same group to obtain a pipeline pressure reference value. This makes the deviation between the absolute pipeline pressure value of the pipeline under test and the pipeline pressure reference value more accurate. This helps the remote monitoring platform 12 to accurately determine the risk of gas pipeline leakage by using the above deviation value to determine if the gas pipeline has a leakage risk, thereby improving the accuracy of the gas monitoring system 100.

[0044] As an optional implementation, the absolute pipeline pressure data detected by each absolute pressure sensing unit 111 in the same group can be preprocessed. For example, when setting the pipeline pressure reference value, the absolute pipeline pressure values ​​that are significantly lower than those of other gas pipelines in the same group can be eliminated first to ensure the rationality of the pipeline pressure reference value setting.

[0045] As an optional implementation, the remote monitoring platform 12 is also used to compare the pipeline pressure reference values ​​of different groups. The pressure regulators corresponding to each group used for comparison belong to the same pressure regulating area, which is divided by the remote monitoring platform 12 according to the distribution information of pipeline pressure regulators. When the deviation between the pipeline pressure reference value of any group and the regional pressure regulating reference value is greater than a preset pressure regulating threshold, the remote monitoring platform 12 determines that the pressure regulator corresponding to the group is abnormal. The regional pressure regulating reference value is set according to the pipeline pressure reference values ​​of each group used for comparison, and the preset pressure regulating threshold is the difference between the pipeline pressure reference value when the pressure regulator is normal and the pipeline pressure reference value when the pressure regulator is abnormal.

[0046] like Figure 3As shown, specifically, the process by which the gas monitoring system 100 of this application determines whether the pressure regulator is abnormal is as follows:

[0047] Step S201: The remote monitoring platform 12 receives the absolute pipeline pressure data of each pipeline monitored by each absolute pressure sensing unit 111.

[0048] Step S202: The remote monitoring platform 12 groups different voltage regulators in the same voltage regulation area;

[0049] Step S203: Analyze the absolute pipeline pressure data of each pipeline monitored by each absolute pressure sensing unit 111 under the same pressure regulator, and set the pipeline pressure reference value.

[0050] Step S204: Repeat step 203 to obtain reference values ​​of pipeline pressure under different pressure regulators;

[0051] Step S205: Obtain the regional pressure regulation reference value based on the pipeline pressure reference value under different pressure regulators;

[0052] Step S206: Obtain the deviation between the pipeline pressure reference value and the area pressure regulation reference value under the pressure regulator under test;

[0053] Step S207: If the obtained deviation value is greater than the preset voltage regulation threshold, then proceed to step S208; otherwise, proceed to step S209.

[0054] Step S208: Determine if the voltage regulator is malfunctioning;

[0055] Step S209: Determine that the voltage regulator is normal.

[0056] Based on the above description, in this embodiment of the application, when determining whether a pressure regulator is abnormal, the pipeline pressure reference value is used as the standard for measuring the pressure regulation of the corresponding pressure regulator. By comparing the pipeline pressure reference values ​​of different pressure regulators located in the same area, the pressure regulators that are abnormal in the area can be identified. In this way, the gas company can monitor the status of the pressure regulator without adding communication equipment to the regulator, enabling the gas company to arrange maintenance in a timely manner and improving the user experience.

[0057] As an optional implementation, the remote monitoring platform 12 averages the pipeline pressure reference values ​​of each group used for comparison to obtain the regional pressure regulation reference value.

[0058] To further illustrate the gas monitoring system 100 provided in this application embodiment, the following description is provided in conjunction with specific scenarios. For example... Figure 4As shown, this example illustrates the monitoring scenario of the gas monitoring system 100 of this application. In this embodiment, taking a community with three units and four households in each unit as an example, a regulator is arranged in the gas pipeline of each unit to regulate the gas pressure entering the unit. An absolute pressure sensing unit 111 is arranged in the gas pipeline of each household to obtain the absolute pipeline pressure data of each household. The gas monitoring system 100 of this application performs gas pipeline detection based on the above situation as follows: First, the gas monitoring system 100 sets the pipeline pressure reference value. Specifically, the remote monitoring platform 12 receives the absolute pipeline pressure data of each household and groups them according to different units. The absolute pipeline pressure data of each household in the same unit is grouped together. Then, the absolute pipeline pressure data of the same group is averaged to obtain the pipeline pressure reference value of the unit. A total of three units have pipeline pressure reference values. Secondly, the gas monitoring system 100 determines whether user pipelines are leaking. Taking one unit as an example, if the deviation between the absolute pipeline pressure data of any of the four monitored households and the pipeline pressure reference value of the unit exceeds a preset pressure threshold, the remote monitoring platform 12 determines that the gas pipeline of that household is at risk of leakage. Similarly, the gas monitoring system 100 can determine whether the pipelines of all users are leaking. In addition, the gas monitoring system 100 can also determine the abnormality of the pressure regulator based on the above situations. Specifically, the remote monitoring platform 12 averages the pipeline pressure reference values ​​of the three units to obtain the regional pressure regulation reference value of the community. When the deviation between the pipeline pressure reference value of any of the three units and the regional pressure regulation reference value of the community exceeds a preset pressure regulation threshold, the pressure regulator of that unit is determined to be abnormal.

[0059] Based on the above description, the gas monitoring system 100 provided in this application embodiment, through the cooperation of the pressure detection module 11 and the remote monitoring platform 12, can not only determine whether there is a leak in the gas pipeline of different branches under the same pressure regulator, but also determine whether different pressure regulators in the same area are abnormal, based on the absolute pipeline pressure data of each pipeline, thus expanding the scope of application of the gas monitoring system 100.

[0060] As an optional implementation, the absolute pressure sensing unit 111 can be installed separately inside the gas pipeline. Alternatively, the absolute pressure sensing unit 111 can be installed in the gas meter. In the gas monitoring system 100 provided in this embodiment, the absolute pressure sensing unit 111 is installed in the gas meter, and the absolute pressure sensing unit 111 communicates with the remote monitoring platform 12 via the gas meter's communication unit. With this configuration, the absolute pressure sensing unit 111 does not need a separate communication unit; it can upload the obtained absolute pipeline pressure data to the remote monitoring platform 12 through the gas meter's communication unit, thereby reducing the cost of the gas monitoring system 100.

[0061] As an optional implementation, the gas meter is used to detect the flow rate of the gas pipeline under test and to determine the gas usage status based on the detected flow rate data. When the gas meter determines that the user is not using gas, the absolute pipeline pressure data detected by the absolute pressure sensing unit 111 is valid, and the absolute pressure sensing unit 111 uploads the valid absolute pipeline pressure data to the remote monitoring platform 12.

[0062] Specifically, the remote monitoring platform 12 receives the absolute pipeline pressure data detected by each absolute pressure sensing unit 111 as the absolute pipeline pressure data when the user is not using gas, thus avoiding misjudgment by the remote monitoring platform regarding whether the pipeline is leaking due to the decrease in absolute pipeline pressure data when the user is using gas normally, thereby improving the accuracy of the remote monitoring platform in judging whether the pipeline is leaking.

[0063] As an optional implementation, the gas meter detects the flow rate of the gas pipeline under test. When the flow rate of the gas pipeline under test is lower than a preset flow rate threshold, the gas meter determines that the user has not used gas.

[0064] Specifically, the preset flow threshold is the minimum flow rate of the gas pipeline during normal user use, typically set to 60 L / h. When the gas meter detects a flow rate in the gas pipeline below 60 L / h, it determines that the user is not using gas. At this time, the absolute pressure sensing unit 111 uploads the detected absolute pipeline pressure data to the remote monitoring platform 12 for further analysis. This setting improves the accuracy of the gas meter's determination of user gas usage, thereby enhancing the effectiveness of the absolute pipeline pressure data received by the remote monitoring platform 12.

[0065] As an optional implementation, the remote monitoring platform 12 uses timestamps to mark the generation time of each received absolute pipeline pressure data. When the remote monitoring platform 12 analyzes the absolute pipeline pressure data detected by each absolute pressure sensing unit 111 in the same group, the deviation between the generation times of the analyzed absolute pipeline pressure data is less than a preset time threshold. The preset time threshold is a certain time period, such as 5 minutes, 10 minutes, etc.

[0066] By using the above settings, the absolute pipeline pressure data for analysis can be obtained from the same time period, which can eliminate the influence of external factors on pipeline pressure and improve the reliability of the absolute pipeline pressure data used for analysis.

[0067] like Figure 5 As shown, as an optional implementation method, the steps for setting the pipeline pressure reference value include:

[0068] Step S301: Each absolute pressure sensing unit 111 monitors the absolute pipeline pressure data of each gas pipeline under test;

[0069] Step S302: The gas meter detects the flow rate of the gas pipeline to be tested;

[0070] Step S303: When the flow rate of the gas pipeline to be tested is lower than the preset flow rate threshold, proceed to step S305; otherwise, proceed to step S304.

[0071] Step S304: The gas meter determines the user's gas consumption;

[0072] Step S305: The gas meter determines that the user has not used gas, and the remote monitoring platform 12 receives the absolute pipeline pressure data of the gas pipeline when the user has not used gas and the time when the absolute pipeline pressure data was obtained.

[0073] Step S306: The remote monitoring platform 12 groups each absolute pressure sensing unit 111 according to preset rules;

[0074] Step S307: Within a preset time threshold, average the absolute pipeline pressure data received in the same group to obtain a pipeline pressure reference value.

[0075] By setting the above parameters, the influence of external interference factors on pipeline pressure data can be eliminated, making the obtained pipeline pressure reference value more reliable. This, in turn, makes the judgment more accurate when comparing absolute pipeline pressure data and pipeline pressure reference value to determine whether the pipeline is leaking.

[0076] like Figure 6 As shown in the embodiments of this application, a gas monitoring method is also provided, including the following steps:

[0077] Step S1: Monitor the absolute pipeline pressure data of each gas pipeline to be tested;

[0078] Step S2: Group the absolute pipeline pressure data according to preset rules;

[0079] Step S3: Analyze the absolute pipeline pressure data in the same group, set the pipeline pressure reference value, and if any absolute pipeline pressure data is lower than the pipeline pressure reference value, and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds the preset pressure threshold, then it is determined that the gas pipeline corresponding to the absolute pipeline pressure data has a leakage risk.

[0080] In step S1, the absolute pipeline pressure data is the absolute pipeline pressure data when the user is not using gas. In step S2, the preset rules include grouping the absolute pressure sensing units 111 according to the distribution information of the pipeline pressure regulators, and grouping the absolute pressure sensing units 111 arranged in different branch gas pipelines under the same pressure regulator into the same group.

[0081] Using the above method, only one absolute pressure sensing unit needs to be installed in the pipeline under test to determine whether the pipeline is leaking based on the absolute pipeline pressure data. This allows for accurate determination of pipeline leaks at a relatively low cost. The above-disclosed embodiments are merely preferred embodiments of this application and are not intended to limit the scope of this application. Those skilled in the art will understand that any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and scope of this application and the appended claims are equivalent substitutions and still fall within the scope of the invention.

Claims

1. A gas monitoring system, characterized in that The gas monitoring system comprises: a pressure detection module comprising at least two absolute pressure sensing units, each of the absolute pressure sensing units being arranged in a respective gas pipeline to be monitored to monitor absolute pipeline pressure data of the respective gas pipeline to be monitored; a remote monitoring platform in communication connection with the pressure detection module to receive the absolute pipeline pressure data detected by each of the absolute pressure sensing units; the remote monitoring platform further groups the absolute pressure sensing units according to a preset rule, analyzes the absolute pipeline pressure data detected by each of the absolute pressure sensing units in the same group, and sets a pipeline pressure reference value, when the absolute pipeline pressure data detected by any of the absolute pressure sensing units is lower than the pipeline pressure reference value and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold, the remote monitoring platform determines that the gas pipeline corresponding to the absolute pressure sensing unit has a leakage risk; the remote monitoring platform stores network pressure regulator distribution information, and the preset rule comprises grouping the absolute pressure sensing units according to the network pressure regulator distribution information, and grouping the absolute pressure sensing units arranged in different branch gas pipelines under the same pressure regulator into the same group; the remote monitoring platform is further configured to compare the pipeline pressure reference values of different groups, wherein the pressure regulators corresponding to each group for comparison belong to the same area, and the pressure regulating area is divided by the remote monitoring platform according to the network pressure regulator distribution information; when the deviation between the pipeline pressure reference value of any group and a regional pressure regulating reference value exceeds a preset pressure regulating threshold, the remote monitoring platform determines that the pressure regulator corresponding to the group is abnormal, wherein the regional pressure regulating reference value is set according to the pipeline pressure reference values of each group for comparison.

2. The gas monitoring system according to claim 1, wherein the remote monitoring platform performs mean value processing on the absolute pipeline pressure data detected by each of the absolute pressure sensing units in the same group to obtain the pipeline pressure reference value.

3. The gas monitoring system according to claim 1, wherein the remote monitoring platform performs mean value processing on the pipeline pressure reference values of each group for comparison to obtain the regional pressure regulating reference value.

4. The gas monitoring system according to claim 1, wherein the absolute pressure sensing unit is arranged in a gas meter, and the absolute pressure sensing unit is in communication connection with the remote monitoring platform based on a communication unit of the gas meter.

5. The gas monitoring system according to claim 4, wherein the gas meter is configured to detect the flow of the gas pipeline to be monitored and determine the gas usage condition according to the detected flow data, when the gas meter determines that the user is not using gas, the absolute pipeline pressure data detected by the absolute pressure sensing unit is valid, and the absolute pressure sensing unit uploads the detected valid absolute pipeline pressure data to the remote monitoring platform.

6. The gas monitoring system according to claim 5, wherein the gas meter detects the flow rate of the to-be-tested gas pipeline, and determines that the user is not using gas when the flow rate of the to-be-tested gas pipeline is lower than a preset flow rate threshold.

7. The gas monitoring system according to claim 1, wherein the remote monitoring platform marks the generation time of each of the received absolute pipeline pressure data with a time stamp, and the remote monitoring platform analyzes each of the absolute pipeline pressure data detected by the absolute pressure sensing unit in the same group, and the deviation between the generation time of each of the analyzed absolute pipeline pressure data is less than a preset time threshold. The gas monitoring method applies the gas monitoring system according to any one of claims 1 to 7, and the method comprises the following steps: monitoring the absolute pipeline pressure data of each of the to-be-tested gas pipelines; 8. A method of monitoring a gas supply, characterized by, grouping each of the absolute pipeline pressure data according to a preset rule; analyzing each of the absolute pipeline pressure data in the same group, setting a pipeline pressure reference value, and determining that the gas pipeline corresponding to any of the absolute pipeline pressure data has a leakage risk when the absolute pipeline pressure data is lower than the pipeline pressure reference value and the deviation between the absolute pipeline pressure data and the pipeline pressure reference value exceeds a preset pressure threshold. ​ ​

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