Method and system for measuring and monitoring flow of natural gas

Abstract

The invention relates to the technical field of natural gas monitoring, and discloses a flow measurement monitoring method and system for natural gas. The method comprises the following steps: S1, dividing 24 hours into a plurality of time monitoring units through a time division module; s2, numbering all natural gas equipment in the target area in sequence through a numbering module, and recording the number as n; s3, a natural gas flow information module is arranged in each natural gas device, and the real-time flow of a natural gas connecting pipe of each natural gas device is collected; s4, analyzing the real-time flow of each time monitoring unit of each natural gas device in the past preset time period through an analysis module to obtain the use flow stability level of each time monitoring unit; whether early warning is needed at present is judged according to the early warning rule of the flow stability level; the flow stability level is determined according to the use habits of all the natural gas devices of all the time monitoring units, and early warning is conducted on a user in time when the natural gas leakage risk exists.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas monitoring, and particularly relates to a method and system for flow measurement and monitoring of natural gas. Background Art

[0002] Natural gas is a clean energy source. After combustion, there is no soot and odor, which helps to improve the environment. Moreover, the supply of natural gas is stable and affordable. Therefore, in cities, most families will use natural gas equipment, such as natural gas stoves and natural gas water heaters, etc. Although natural gas is the best gas source for urban gas, natural gas also has the characteristics of being flammable and explosive. When natural gas mixes with air within a certain concentration range, it will form an explosive mixture gas, and an explosion will occur when encountering an open flame. Therefore, after using natural gas, it is necessary to close the valve to prevent natural gas leakage.

[0003] Currently, gas detection devices are usually installed in locations such as kitchens to detect the natural gas concentration in locations such as kitchens, so as to detect whether natural gas leaks.

[0004] However, the environment in the kitchen is relatively complex. When cooking, a lot of oil fumes and water vapor will be generated. The oil fumes will adhere to the surface of the gas detection device, contaminating the sampled gas, and even blocking the sampling port of the gas detection device, making it impossible to sample, resulting in the inability to accurately detect the natural gas concentration, and thus unable to accurately determine whether there is natural gas leakage. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and system for flow measurement and monitoring of natural gas, and solve the following technical problems:

[0006] How to timely detect the risk of natural gas leakage.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A method for flow measurement and monitoring of natural gas, the monitoring method includes the following steps;

[0009] S1: Divide 24 hours into several time monitoring units through a time division module;

[0010] S2: Number all natural gas equipment in the target area in sequence through a numbering module, and the number is recorded as ;

[0011] S3: Collect the real-time flow rate of the natural gas connection pipes of each natural gas equipment by respectively setting a natural gas flow information module in each natural gas equipment;

[0012] S4: Analyze the real-time flow rates of each time monitoring unit of each natural gas device within a preset time period in the past through an analysis module to obtain the usage flow stability level of each time monitoring unit; and determine whether a warning is required currently according to the warning rules of the flow stability level.

[0013] As a further solution of the present invention: the serial number The method for obtaining the flow stability level of each time monitoring unit of the natural gas device includes the following steps:

[0014] S10: Obtain the curve of the daily real-time flow rate of the natural gas device changing with time within a preset time period in the past through the natural gas flow information module for the serial number of the natural gas device.

[0015] S20: Analyze the curve of the daily real-time flow rate of the natural gas device changing with time within a preset time period in the past for the serial number of the natural gas device to obtain the flow stability index of each time monitoring unit of the natural gas device with the serial number .

[0016] S30: Analyze the flow stability index of each time monitoring unit of the natural gas device with the serial number to obtain the flow stability level of each time monitoring unit of the natural gas device with the serial number .

[0017] As a further solution of the present invention: through the formula:

[0018] Calculate the flow stability index of the th time monitoring unit of the natural gas device ;

[0019] wherein, is the curve of the real-time flow rate changing with time on the th day within a preset time period in the past of the natural gas device with the serial number ; is the start time of the th time monitoring unit; is the preset duration of the time monitoring unit; is the preset number of days of the preset time period in the past, ; is the first preset constant.

[0020] As a further solution of the present invention: the determination process of the flow stability level of each time monitoring unit is:

[0021] For the serial number of the Flow stability index of a time monitoring unit is compared with a preset value ; When the number of the natural gas equipment's time monitoring unit is at level one for flow stability;

[0022] When the number of the natural gas equipment's time monitoring unit is at level two for flow stability;

[0023] When the number of the natural gas equipment's time monitoring unit is at level three for flow stability.

[0024] As a further solution of the present invention: Through the formula:

[0025]

[0026] calculate the first judgment index ;

[0027] wherein, is the first judgment function. When , ; When , ; is the curve of the real-time flow of the natural gas equipment with number changing over time on the current day, is the current time; is the start time of the time monitoring unit corresponding to the current time.

[0028] As a further solution of the present invention: Through the formula:

[0029]

[0030] calculate the second judgment index ;

[0031] wherein, is the second preset value; is the second preset duration; is the third preset value, is the maximum value of the real-time flow within the second preset duration in the past from the current time.

[0032] As a further solution of the present invention: The judgment process of determining whether a warning is required currently according to the warning rules of the flow stability level is:

[0033] When the flow stability level is at the first level, when occurs, a warning is given and the valve is closed; otherwise, no warning is given;

[0034] When the flow stability level is at the second level, when , a warning is given and the valve is closed; otherwise, no warning is given;

[0035] When the flow stability level is at the third level, when occurs, a warning is given and the valve is closed; otherwise, no warning is given.

[0036] A flow measurement and monitoring system for natural gas, the monitoring system comprising:

[0037] A time division module for dividing 24 hours into a plurality of time monitoring units;

[0038] An encoding module for sequentially encoding all natural gas devices in the target area, and the encoding is denoted as ;

[0039] A plurality of natural gas flow information modules, corresponding one-to-one with the natural gas devices, for collecting the real-time flow rate of the natural gas connecting pipes of the corresponding natural gas devices;

[0040] An analysis module for analyzing the real-time flow rates of each time monitoring unit of each natural gas device in a preset time period in the past to obtain the usage flow stability level of each time monitoring unit; and judging whether a warning is required currently according to the warning rules of the flow stability level.

[0041] Advantages of the present invention:

[0042] (1) Firstly, the present invention divides 24 hours into a plurality of time monitoring units through the time division module; then sequentially encodes all natural gas devices in the target area through the encoding module, and the encoding is denoted as ; then, by respectively arranging natural gas flow information modules in each natural gas device, the real-time flow rate of the natural gas connecting pipe of each natural gas device is collected; finally, the analysis module analyzes the real-time flow rates of each time monitoring unit of each natural gas device in a preset time period in the past to obtain the usage flow stability level of each time monitoring unit; and determines the warning rules of each time monitoring unit according to the flow stability level, and judges whether a warning is required currently according to the warning rules of the flow stability level; determines the flow stability level according to the usage habits of each natural gas device in each time monitoring unit, and uses different warning methods for warning according to the flow stability level, so as to timely warn users when there is a risk of natural gas leakage. Description of the Drawings

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Figure 1 It is a method flowchart of an embodiment of the present invention;

[0046] Figure 2 It is a system module framework diagram of an embodiment of the present invention. Specific embodiments

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] Please refer to Figure 1 As shown, in one embodiment, a method for monitoring the flow rate of natural gas is provided. The monitoring method includes the following steps;

[0050] S1: Divide 24 hours into several time monitoring units through a time division module;

[0051] S2: Number all natural gas devices in the target area in sequence through a numbering module, and the number is recorded as ;

[0052] S3: Collect the real-time flow rate of the natural gas connection pipes of each natural gas device by respectively setting a natural gas flow rate information module in each natural gas device;

[0053] S4: Analyze the real-time flow rate of each time monitoring unit of each natural gas device in the past preset time period through an analysis module to obtain the usage flow rate stability level of each time monitoring unit; and judge whether a warning is required currently according to the warning rules of the flow rate stability level;

[0054] Through the above technical solutions, in this embodiment, 24 hours are first divided into several time monitoring units through a time division module; then all natural gas devices in the target area are numbered in sequence through a numbering module, and the number is recorded as ; Then, by respectively setting natural gas flow information modules in each natural gas device, the real-time flow of the natural gas connecting pipes of each natural gas device is collected; finally, the analysis module analyzes the real-time flow of each time monitoring unit of each natural gas device in a preset past time period to obtain the usage flow stability level of each time monitoring unit; and determines the warning rules for each time monitoring unit according to the flow stability level, and judges whether a warning is needed currently according to the warning rules of the flow stability level; determines the flow stability level according to the usage habits of each natural gas device of each time monitoring unit, and uses different warning methods for warning according to the flow stability level, so as to warn users in time when there is a risk of natural gas leakage.

[0055] As an implementation manner of the present invention, the number The method for obtaining the flow stability level of each time monitoring unit of the natural gas device includes the following steps:

[0056] S10: Obtain the change curve of the daily real-time flow of the natural gas device numbered over time through the natural gas flow information module in a preset past time period;

[0057] S20: Analyze the change curve of the daily real-time flow of the natural gas device numbered over time in a preset past time period to obtain the flow stability index of each time monitoring unit of the natural gas device numbered ;

[0058] S30: Analyze the flow stability index of each time monitoring unit of the natural gas device numbered to obtain the flow stability level of each time monitoring unit of the natural gas device numbered ;

[0059] Through the above technical solution, in this embodiment, first, the change curve of the daily real-time flow of the natural gas device numbered over time is obtained through the natural gas flow information module in a preset past time period; then, the change curve of the daily real-time flow of the natural gas device numbered over time in a preset past time period is analyzed to obtain the flow stability index of each time monitoring unit of the natural gas device numbered ; finally, the flow stability index of each time monitoring unit of the natural gas device numbered is analyzed to obtain the flow stability level of each time monitoring unit of the natural gas device numbered ; the flow stability degree of each time monitoring unit is determined through the flow stability level.

[0060] As an implementation manner of the present invention, through the formula:

[0061]

[0062] Calculation number Natural Gas Equipment Flow stability index of each time monitoring unit ;

[0063] in, Number The first time that the natural gas equipment has been set within the past time period The curve of real-time traffic flow over time; For the The start time of a time monitoring unit; The preset duration of the time monitoring unit; The preset number of days in the past preset time period, ; is the first preset constant;

[0064] Through the above technical solution, this embodiment Number The gas equipment has been The day is The accumulated flow volume of each time monitoring unit; Number The natural gas equipment has been The average flow accumulation of each time monitoring unit; Number The natural gas equipment has been The standard deviation of the flow accumulation of each time monitoring unit; serial number The natural gas equipment has been The standard deviation of the flow accumulation of each time monitoring unit The larger the number, the The natural gas equipment has been The more unstable the flow accumulation of each time monitoring unit is, the more unstable the flow accumulation of each time monitoring unit is. Natural Gas Equipment Flow stability index of each time monitoring unit The bigger; serial number The natural gas equipment has been The standard deviation of the flow accumulation of each time monitoring unit The smaller the number, the The natural gas equipment has been The more stable the flow accumulation of each time monitoring unit is, the more stable the flow accumulation of each time monitoring unit is. The flow stability index of the first time monitoring unit of the natural gas equipment is smaller;

[0065] It should be noted that the preset duration of the time monitoring unit , the preset number of days in the past preset time period and the first preset constant are preset values, obtained based on experience and not elaborated here.

[0066] As an implementation manner of the present invention, the determination process of the flow stability level of each time monitoring unit is as follows:

[0067] Compare the flow stability index of the first time monitoring unit of the natural gas equipment with the preset value ;

[0068] When , the flow stability level of the first time monitoring unit of the natural gas equipment is level one;

[0069] When , the flow stability level of the first time monitoring unit of the natural gas equipment is level two;

[0070] When , the flow stability level of the first time monitoring unit of the natural gas equipment is level three;

[0071] Through the above technical solution, in this embodiment, when , the flow stability level of the first time monitoring unit of the natural gas equipment is level one; indicating that the flow of this time monitoring unit is extremely stable; when , the flow stability level of the first time monitoring unit of the natural gas equipment is level two; indicating that the flow of this time monitoring unit is relatively stable; when , the flow stability level of the first time monitoring unit of the natural gas equipment is level three; indicating that the flow of this time monitoring unit is unstable;

[0072] It should be noted that the preset value is a preset value, obtained based on experience and not elaborated here.

[0073] As an implementation manner of the present invention, through the formula:

[0074]

[0075] calculate the first judgment index ;

[0076] wherein, is the first judgment function. When , ; when , ; is the number the change curve of the real-time flow of the natural gas equipment on the current day with time, is the current time; is the start time of the time monitoring unit corresponding to the current time;

[0077] Through the above technical solution, in this embodiment is the number the cumulative flow of the time monitoring unit corresponding to the current time of the natural gas equipment; is the number the cumulative flow of the natural gas equipment on the th day in the past preset time period at the time monitoring unit corresponding to the current time; is the number the cumulative flow number of the time monitoring unit corresponding to the current time of the natural gas equipment the natural gas equipment on the th day in the past preset time period at the th time monitoring unit and the difference between the cumulative natural gas flow and the number the average natural gas flow of the time monitoring unit corresponding to the current time of the natural gas equipment in the past preset time period; In the formula the first judgment function in refers to ; When , it indicates that the cumulative natural gas flow of the natural gas equipment on the th day in the past preset time period at the time monitoring unit corresponding to the current time does not exceed the number the average natural gas flow of the time monitoring unit corresponding to the current time of the natural gas equipment in the past preset time period, and there is no risk; ; ; When When it indicates the serial number The cumulative natural gas flow of the time monitoring unit corresponding to the current time on the day of the natural gas equipment in the past preset time period exceeds the serial number The average natural gas flow of the time monitoring unit corresponding to the current time of the natural gas equipment in the past preset time period; There may be risks, 1;

[0078] It should be noted that the start time of the time monitoring unit corresponding to the current time is a preset value, obtained based on experience and not elaborated here.

[0079] As an implementation manner of the present invention, through the formula:

[0080]

[0081] Calculate the second judgment index ;

[0082] Wherein, is the second preset value; is the second preset duration; is the third preset value, is the maximum real-time flow within the second preset duration in the past from the current time;

[0083] Through the above technical solution, in this embodiment is the cumulative natural gas flow within the second preset duration in the past from the current time; is the difference between the second preset value and the cumulative natural gas flow within the second preset duration in the past from the current time; in the formula The first judgment function in refers to ; When it indicates that the cumulative flow within the second preset duration in the past from the current time is relatively large and the natural gas is in a used state; when it indicates that the cumulative natural gas flow within the second preset duration in the past from the current time is less than the second preset value, indicating that the cumulative flow within the second preset duration in the past from the current time is relatively small, and there may be a risk of the valve not being tightly closed and natural gas leakage; in the formula The first judgment function in refers to ; When it indicates that the maximum real-time flow within the second preset duration in the past from the current time is relatively large and the natural gas is in a used state; when When it indicates that the maximum real-time flow within the second preset duration from the current time is less than the third preset value, it shows that the maximum real-time flow within the second preset duration from the current time is relatively small, and there may be a situation where the valve is not tightly closed and natural gas is leaking.

[0084] It should be noted that the second preset value , the second preset duration and the third preset value are preset values obtained based on experience and will not be elaborated here.

[0085] As an implementation manner of the present invention, the judgment process for determining whether to give an early warning currently according to the early warning rules of the flow stability level is as follows:

[0086] When the flow stability level is at the first level, when , give an early warning and close the valve; otherwise, do not give an early warning;

[0087] When the flow stability level is at the second level, when , give an early warning and close the valve; otherwise, do not give an early warning;

[0088] When the flow stability level is at the third level, when , give an early warning and close the valve; otherwise, do not give an early warning;

[0089] Through the above technical solution, in this embodiment, when the flow stability level is at the first level, when , give an early warning and close the valve; otherwise, do not give an early warning; when the flow stability level is at the second level, when , give an early warning and close the valve; otherwise, do not give an early warning; when the flow stability level is at the third level, when , give an early warning and close the valve; otherwise, do not give an early warning.

[0090] Please refer to Figure 2 as shown, a flow measurement and monitoring system for natural gas, the monitoring system includes:

[0091] A time division module for dividing 24 hours into several time monitoring units;

[0092] A numbering module for sequentially numbering all natural gas devices within the target area, and the number is denoted as ;

[0093] Several natural gas flow information modules, corresponding to the natural gas devices one by one, for collecting the real-time flow of the natural gas connection pipes of the corresponding natural gas devices;

[0094] An analysis module is used to analyze the real-time flow rates of each time monitoring unit of each natural gas device in the past preset time period to obtain the usage flow stability level of each time monitoring unit; and determine whether a warning is required currently according to the warning rules of the flow stability level.

[0095] The above has described an embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application shall still fall within the patent coverage scope of the present invention.

Claims

1. A natural gas flow measurement and monitoring method, characterized in that: The monitoring method comprises the following steps: S1: Divide 24 hours into several time monitoring units through the time division module; S2: All natural gas equipment in the target area are numbered in sequence through the numbering module, and the numbers are recorded as ; S3: by setting a natural gas flow information module in each natural gas device, collecting the real-time flow of the natural gas connecting pipe of each natural gas device; S4: Analyze the real-time flow of each time monitoring unit of each natural gas device in the past preset time period through the analysis module to obtain the usage flow stability level of each time monitoring unit; And determine whether an early warning is currently needed based on the early warning rules of the traffic stability level.

2. A natural gas flow measurement and monitoring method according to claim 1, characterized in that: serial number The method for obtaining the flow stability level of each time monitoring unit of the natural gas equipment includes the following steps: S10: Obtain the number within the past preset time period through the natural gas flow information module The daily real-time flow rate of natural gas equipment changes over time; S20: by numbering the preset time period in the past Analyze the daily real-time flow rate of natural gas equipment over time and obtain the number The flow stability index of the monitoring unit of the natural gas equipment at each time; S30: By matching the number Analyze the flow stability index of the monitoring unit of the natural gas equipment at each time and obtain the number Flow stability level of the monitoring unit of the natural gas equipment at each time.

3. A natural gas flow measurement and monitoring method according to claim 2, characterized in that: By formula: Calculation number Natural Gas Equipment Flow stability index of each time monitoring unit ; in, Number The first time that the natural gas equipment has been set within the past time period The curve of real-time traffic flow over time; For the The start time of a time monitoring unit; The preset duration of the time monitoring unit; The preset number of days in the past preset time period, ; is the first preset constant.

4. A natural gas flow measurement and monitoring method according to claim 3, characterized in that: The process of determining the flow stability level of each time monitoring unit is as follows: Number Natural Gas Equipment Flow stability index of each time monitoring unit With the default value Make comparisons; when When, number Natural Gas Equipment The flow stability level of each time monitoring unit is level one; when When, number Natural Gas Equipment The flow stability level of each time monitoring unit is level 2; when When, number Natural Gas Equipment The flow stability level of each time monitoring unit is level three.

5. A natural gas flow measurement and monitoring method according to claim 4, characterized in that: By formula: Calculate the first judgment index ; in, is the first judgment function, when hour, ;when hour, ; Number The curve of the real-time flow rate of natural gas equipment on the day changing with time, is the current time; The start time of the time monitoring unit corresponding to the current time.

6. A natural gas flow measurement and monitoring method according to claim 5, characterized in that: By formula: Calculate the second judgment index ; in, is a second preset value; is the second preset duration; is the third preset value, It is the maximum value of real-time traffic within the second preset time period after the current time.

7. A natural gas flow measurement and monitoring method according to claim 6, characterized in that: The process of judging whether an early warning is needed according to the early warning rules of the traffic stability level is as follows: When the flow stability level is level 1, When the valve is in the fault state, an early warning is issued and the valve is closed; otherwise, no early warning is issued; When the flow stability level is level 2, , an early warning is given and the valve is closed; otherwise, no early warning is given; When the flow stability level is level 3, When the valve is in the fault state, an early warning is given and the valve is closed; otherwise, no early warning is given.

8. A natural gas flow measurement and monitoring system, applicable to a natural gas flow measurement and monitoring method according to any one of claims 1 to 7, characterized in that: The monitoring system comprises: The time division module is used to divide 24 hours into several time monitoring units; The numbering module is used to number all natural gas equipment in the target area in order, and the numbers are recorded as ; Several natural gas flow information modules correspond to natural gas equipment one by one and are used to collect the real-time flow of the natural gas connecting pipe of the corresponding natural gas equipment; The analysis module is used to analyze the real-time flow of each time monitoring unit of each natural gas equipment within the preset time period in the past, obtain the usage flow stability level of each time monitoring unit; and determine whether an early warning is currently required based on the early warning rules of the flow stability level.

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