CN116539127A - Natural gas flow meter verification method, device, equipment and storage medium - Google Patents
Natural gas flow meter verification method, device, equipment and storage medium Download PDFInfo
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- CN116539127A CN116539127A CN202310681901.0A CN202310681901A CN116539127A CN 116539127 A CN116539127 A CN 116539127A CN 202310681901 A CN202310681901 A CN 202310681901A CN 116539127 A CN116539127 A CN 116539127A
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
- G01F25/15—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
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Abstract
The application relates to a natural gas flow meter verification method, a device, equipment and a storage medium. The method comprises the following steps: receiving a verification request sent by a client, wherein the verification request carries the type of a verified flow meter and a plurality of flow points; determining a target standard pipeline related to the flow meter to be verified according to the type of the flow meter to be verified; controlling the valve on the target standard meter pipeline to be opened and closed so as to realize the flow of the flow point; determining the verification result of the verified flowmeter at each flow point; determining the comprehensive verification result of the verified flowmeter according to the verification result of each flow point; and sending the comprehensive verification result to the client. The operation and maintenance personnel can realize automatic verification of the flowmeter in a long distance, realize automatic verification and improve the working efficiency of the operation and maintenance personnel.
Description
Technical Field
The application relates to the technical field of flowmeter verification, in particular to a natural gas flowmeter verification method, a device, equipment and a storage medium.
Background
Natural gas flowmeter verification is a very important task, and in the related art, operation and maintenance personnel can only manually verify the flowmeter in field operation, for example, a large number of valve switch operations are involved, and the operation is complex and the efficiency is low.
Disclosure of Invention
To overcome the problems in the related art, the present application provides a method, apparatus, device and storage medium for calibrating a natural gas meter, so as to solve the above-mentioned problems.
According to a first aspect of embodiments of the present application, there is provided a method of natural gas flow meter verification, the method comprising:
receiving a verification request sent by a client, wherein the verification request carries the type of a verified flow meter and a plurality of flow points;
determining a target standard pipeline related to the flow meter to be verified according to the type of the flow meter to be verified;
controlling the valve on the target standard meter pipeline to be opened and closed so as to realize the flow of the flow point;
determining the verification result of the verified flowmeter at each flow point;
determining the comprehensive verification result of the verified flowmeter according to the verification result of each flow point;
and sending the comprehensive verification result to the client.
In one embodiment, for each assay at each flow point, after the assay is completed, the assay parameters for that time for that flow point are obtained;
in response to determining that the assay is invalid based on the assay parameters, the assay is continued for the flow point.
In one embodiment, the assay parameters include: flow, temperature and pressure;
determining that the assay is invalid based on the assay parameters, comprising:
determining a flow difference between the flow and a predetermined flow threshold, and determining that the assay is invalid in response to the flow difference being greater than the predetermined flow difference threshold;
determining a temperature of the gas at the flow point, determining that the assay is invalid in response to a change in the temperature being greater than a predetermined temperature change threshold;
determining a pressure fluctuation ratio of the flow point, and determining that the assay is invalid in response to the pressure fluctuation ratio being greater than a predetermined pressure fluctuation ratio threshold.
In one embodiment, for each flow point, after the assay is completed, in response to determining that the assay is valid according to the assay parameters, the method further comprises: determining the verification result of the verified flowmeter according to the verification parameters of the flow point, which comprises the following steps:
determining a corresponding accuracy class table according to the type of the flow meter to be verified;
and determining a verification result according to the accuracy class table.
In one embodiment, the method further comprises:
acquiring the instantaneous flow of each standard table pipeline in real time;
responding to the fact that the flow of any standard table pipeline is equal to or greater than a preset first flow threshold and smaller than a preset second flow threshold, and sending a first alarm message to the client;
responding to the flow of any standard table pipeline of the item standard table to be equal to or larger than a preset second flow threshold value, and sending a second alarm message to the client;
the second alarm message has a priority higher than the first alarm message.
In one embodiment, the method further comprises:
acquiring the instantaneous flow of each flow meter pipeline to be calibrated in real time;
responding to the fact that the flow of any detected flow meter pipeline is larger than or equal to a preset third flow threshold and smaller than a preset fourth flow threshold, and sending a third alarm message to the client;
responding to the condition that the flow of any standard table pipeline is equal to or greater than a preset fourth flow threshold value, and sending a fourth alarm message to the client;
the fourth alarm message has a higher priority than the third alarm message.
In one embodiment, the method further comprises:
acquiring the pressure difference and the pressure drop rate of the in-out station in real time;
and sending a fifth alarm message to the client in response to the in-out differential pressure being equal to or greater than a predetermined differential pressure threshold and/or the pressure drop rate being equal to or greater than a predetermined pressure drop rate threshold.
In a second aspect, the present application provides a natural gas flow meter verification device comprising:
the verification module is used for receiving a verification request sent by the client, wherein the verification request carries the type of a verified flow meter and a plurality of flow points;
the first determining module is used for determining a target standard pipeline related to the flow meter to be detected according to the type of the flow meter to be detected;
the control module is used for controlling the opening and closing of a valve on the target standard meter pipeline so as to realize the flow of the flow point;
the second determining module is used for determining the verification result of the verified flowmeter at each flow point;
the third determining module is used for determining the comprehensive verification result of the verified flowmeter according to the verification result of each flow point;
and the sending module is used for sending the comprehensive verification result to the client.
In a third aspect, the present application provides a natural gas flow meter verification apparatus comprising:
a processor; a memory for storing processor-executable instructions;
wherein the processor is configured to execute the executable instructions to implement the method of any of the above.
In a fourth aspect, the present application proposes a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any of the preceding claims.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: in the technical scheme, the server receives the verification request sent by the client, determines the type of the verified flowmeter, and further determines a target standard pipeline related to the verified flowmeter. And controlling the opening and closing of a valve on the target standard pipeline to realize the flow of each flow point, determining the verification result of the verified flowmeter at each flow point, determining the final verification result of the verified flowmeter according to the verification result of each flow point, and sending the final verification result to the client. The operation and maintenance personnel can realize automatic verification of the flowmeter in a long distance, so that automatic verification is realized, and the working efficiency and the intelligent level of the operation and maintenance personnel are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a flow chart illustrating a method of natural gas flow meter verification according to an exemplary embodiment;
FIG. 2 is a flow chart illustrating an advanced natural gas flow meter smart certification method according to an example embodiment;
FIG. 3 is a block diagram illustrating a natural gas flow meter verification device according to an exemplary embodiment;
fig. 4 is a block diagram illustrating a natural gas flow meter verification device in accordance with an exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.
A method of natural gas flow meter verification, see fig. 1, comprising the steps of:
in step S102, a verification request sent by the client is received, where the verification request carries a type of a flow meter to be verified and a plurality of flow points.
In this embodiment, the operation and maintenance personnel may set a verification request on the client, and send the verification request to the server. The server may receive a certification request sent by the client. After receiving the verification request, the server can automatically complete the verification task.
The types of the flow meter to be calibrated comprise one or more of the following: turbine flow meter, ultrasonic flow meter, orifice flow meter, mass flow meter, sonic nozzle flow meter, channel flow meter.
The verification request can comprise a verification task list, and the verification task list can also comprise the following parameters of the verification: flow meter caliber, maximum flow, flow point number.
In step S104, a target standard pipeline related to the flow meter to be calibrated is determined according to the type of the flow meter to be calibrated.
In this embodiment, the turbine flowmeter corresponds to the first standard pipeline; the ultrasonic flowmeter corresponds to the second standard pipeline. And if the flow meter to be verified is a turbine flowmeter, determining a first standard pipeline, and if the flow meter to be verified is an ultrasonic flowmeter, determining a second standard pipeline.
In step S106, the valve on the target standard pipeline is controlled to be opened or closed to realize the flow of each flow point.
In this embodiment, the server is electrically connected to the valves on the target standard pipeline, and the server can control the opening and closing of each valve and the opening degree, so that the flow rate on the target standard pipeline can be adjusted, so that the flow rate on the target standard pipeline reaches the flow rate value of the flow point.
In step S108, the verification result of the flow meter under verification at each flow point is determined.
In this embodiment, for any flow point, the server controls the relevant valve to open or close, so that after the flow on the target pipeline is the flow value of the flow point, the server can also control the relevant standard flowmeter to perform verification, and the verification process of the verified flowmeter is completed.
The standard flowmeter is preset, and the standard flowmeter is arranged in parallel, wherein the standard flowmeter is multiple in number. Specifically, the method can be used for verifying by connecting a plurality of standard meter flowmeters in parallel and then connecting the standard meter flowmeters in series with the tested flowmeter in a mode that the volumes of gas flowing through the standard device and the tested flowmeter are equal in the same time, and finally, the accuracy assessment of the tested flowmeter is realized, the real-flow verification work is completed, and verification certificates or calibration reports are provided.
The plurality of standard flow meters may be electrically connected to the server and transmit data to the server.
After the verification is completed, the verification results of the verification are determined, wherein the verification results comprise verification pass or verification fail.
In some embodiments, an upper threshold of the number of tests may be preset, and if the upper threshold of the number of tests is reached, the test is still failed, and then the test at the next flow point is automatically entered.
In step S110, a comprehensive verification result of the flow meter to be verified is determined according to the verification result of each flow point.
In this embodiment, when determining the comprehensive verification result of the flow meter to be verified according to the verification result of each flow point, the following rule may be adopted:
if the verification result of at least one flow point is unqualified, the comprehensive verification result is unqualified; only if the verification results of all flow points are qualified, the comprehensive verification results are qualified.
Of course, redundancy may be set, where the comprehensive verification result is determined to be failed when the number of verification results of the predetermined number of flow points is equal to or greater than the predetermined number of times threshold, and if the number of failures is less than the predetermined number of times threshold, the comprehensive verification result is determined to be qualified.
Wherein, the comprehensive verification result comprises verification qualification or verification failure.
In step S112, the comprehensive verification result is sent to the client.
In this embodiment, the server may send the above verification result to the above client, where the above client receives and displays the above verification result, so that an operation and maintenance person conveniently performs verification on the detected flowmeter from a remote end, which is helpful for improving the verification efficiency of the operation and maintenance person.
In the technical scheme, the server receives the verification request sent by the client, determines the type of the verified flowmeter, and further determines a target standard pipeline related to the verified flowmeter. And controlling the opening and closing of a valve on the target standard pipeline to realize the flow of each flow point, determining the verification result of the verified flowmeter at each flow point, determining the final verification result of the verified flowmeter according to the verification result of each flow point, and sending the final verification result to the client. The operation and maintenance personnel can realize automatic verification of the flowmeter in a long distance, so that automatic verification is realized, and the working efficiency and the intelligent level of the operation and maintenance personnel are improved.
In one embodiment, for each assay at each flow point, after the assay is completed, the assay parameters for that time at the flow point are obtained.
In response to determining that the assay is invalid based on the assay parameters, the assay is continued for the flow point.
In this embodiment, for any flow point, after the verification is completed, the verification parameter of the time may be obtained, and whether the verification of the time is valid is determined according to the verification parameter, if so, the verification result is determined, and if not, the verification is continued for the flow point, that is, the current flow value is kept unchanged, and the verification is continued until the verification is valid. According to the method, whether the verification is effective or not is judged, so that the verification effectiveness can be improved, the verification error rate is reduced, and the verification accuracy is improved.
In one embodiment, the assay parameters include one or more of the following: flow, temperature and pressure.
Determining that the assay is invalid based on the assay parameters may further comprise the steps of:
and determining a flow difference between the flow and a predetermined flow threshold, and determining that the assay is invalid in response to the flow difference being greater than the predetermined flow difference threshold.
In this embodiment, the flow rate difference threshold may be flexibly set.
Illustratively, during verification, each actual verification flow at each flow point deviates from the set flow by no more than ±5% of the set flow or no more than ±1% of the maximum flow, and no more than ±5% of the set flow is provided by the ultrasonic flow meter.
Determining a temperature of the gas at the flow point, and determining that the assay is invalid in response to a change in the temperature being greater than a predetermined temperature change threshold.
In this embodiment, the temperature change threshold value described above can be flexibly set.
Illustratively, a flow meter with an accuracy rating of no less than 1.0 will not vary in temperature of the assay gas by more than + -0.5deg.C during each assay at each flow point, and a flow meter with an accuracy rating of less than 1.0 will not vary in temperature of the assay gas by more than + -1deg.C during each assay at each flow point.
Determining a pressure fluctuation ratio of the flow point, and determining that the assay is invalid in response to the pressure fluctuation ratio being greater than a predetermined pressure fluctuation ratio threshold.
In the present embodiment, the pressure fluctuation ratio threshold value described above can be flexibly set.
Illustratively, the pressure fluctuation should not exceed + -0.5% during the verification of each flow point
In some embodiments, in step S104, determining a target standard pipeline related to the flow meter to be calibrated according to the type of the flow meter to be calibrated may further include the following steps:
and establishing a reinforcement learning model, wherein the initial stage lacks data of actual field operation, and training can be performed based on a first hydraulic optimization model algorithm so as to reduce the field learning time.
In the initial stage of the actual operation of the site, the first hydraulic optimization model algorithm can be selected for actual calculation, and at the moment, the second hydraulic optimization model algorithm also operates normally and automatically learns according to the actual data of the site, so that the purpose of learning and optimizing is achieved.
After training, the first hydraulic optimization model algorithm or the second hydraulic optimization model algorithm can be automatically selected to control, so that standard device pipeline combination calculation, main flow regulating pipeline and bypass flow regulating pipeline combination optimal calculation and target valve position calculation are realized, and finally standard device pipeline switching, pressure regulating pipeline automatic switching and pressure flow automatic regulation are realized by matching with a control system.
In order to achieve the flow overrun protection for the standard table, in one embodiment, the method may further include the steps of:
and acquiring the instantaneous flow of each standard table pipeline in real time, and responding to the condition that the flow of any standard table pipeline is equal to or greater than a preset first flow threshold and smaller than a preset second flow threshold, and sending a first alarm message to the client.
In this embodiment, the first flow threshold and the second flow threshold may be flexibly set according to actual situations. For example, the first flow threshold may be 80% of the set upper limit value, and the first alarm message may be displayed at the upper computer in addition to transmitting the first alarm message to the client.
The first alarm message may be a voice message or a text message. For example, the first alarm message is that the traffic exceeds the standard, please process.
And sending a second alarm message to the client in response to the flow of any standard table pipeline being equal to or greater than a predetermined second flow threshold.
The second alarm message has a priority higher than the first alarm message.
In this embodiment, the second flow threshold is greater than the first flow threshold, and when the flow of the target standard meter pipeline is equal to or greater than the predetermined second flow threshold, it is indicated that the standard exceeding situation is more serious, and timely alarm is required. The second alarm message is, for example, a message that the traffic is seriously out of standard, please be processed immediately.
In some embodiments, after the alarm, the server may perform related control tasks, for example, may control the verification loop outbound regulator valve to close and may control the bypass line regulator valve to open. Of course, the above-described outbound and bypass line control valves may also be provided as manual controls. If the flow rate is reduced to within 80%, stopping closing the valve by the check loop regulating valve, stopping opening the valve by the bypass loop, keeping the current state, and waiting for the continuous check.
In order to achieve flow protection for the calibrated flow meter, in one embodiment, the method may further comprise the steps of:
and acquiring the instantaneous flow of each flow meter pipeline to be calibrated in real time.
And responding to the fact that the flow of any detected flow meter pipeline is larger than or equal to a preset third flow threshold and smaller than a preset fourth flow threshold, and sending a third alarm message to the client.
And sending a fourth alarm message to the client in response to the flow of any standard table pipeline being equal to or greater than a predetermined fourth flow threshold.
The fourth alarm message has a higher priority than the third alarm message.
In order to prevent downstream gas interruption and to regulate the pressure drop rate too fast, in one embodiment the above method may further comprise the steps of:
acquiring the pressure difference and the pressure drop rate of the in-out station in real time;
and sending a fifth alarm message to the client in response to the in-out differential pressure being equal to or greater than a predetermined differential pressure threshold and/or the pressure drop rate being equal to or greater than a predetermined pressure drop rate threshold.
In this embodiment, in order to prevent downstream gas interruption and adjust the pressure drop rate too fast, monitor the pressure difference and the pressure drop rate of the in-out station in real time and set the alarm value, when the pressure drop rate is too fast and exceeds the limit value, the bypass adjusting valve needs to be adjusted in a stepped manner, so as to prevent the instantaneous rising of the downstream pressure and the consistent condition of the upstream pressure. In the flow regulation process, the shut-off condition of the check pipeline regulating valve and the bypass regulating valve is prevented from suddenly and simultaneously.
Referring to a flow chart of an advanced intelligent verification method for a natural gas flow meter shown in fig. 2, the method comprises the following steps:
the task is automatically loaded;
task configuration;
setting a flow point;
switching the flow point;
judging whether any flow point is stable or not;
if stable, verifying the flow point;
judging whether the verification is qualified and effective;
if not, automatically increasing verification times to continuously verify the flow point
If the verification is effective, judging whether all the flow points are finished, if not, verifying the flow points which are not verified; if so, the assay is complete.
If the flow is unstable, sending a flow regulation application to the intelligent control system;
the intelligent control system calculates an optimal labeling pipeline combination according to the flow;
automatically switching a standard meter pipeline;
calculating an optimal adjusting pipeline combination according to the water conservancy optimizing model;
adjusting the pipeline combination according to the deep reinforcement learning method;
controlling the bypass flow regulating pipeline valve to reach a specified valve position;
controlling the valve of the main flow regulating pipeline to reach a designated valve position;
calibrating the flow coarse adjustment;
judging whether the flow is stable or not, if not, returning to the previous step;
if the flow is stable, the accurate adjustment of the flow is verified;
valve speed limiting;
judging whether the standard pipeline flow exceeds the limit, if so, alarming, and closing the corresponding valve;
if the flow rate of the detected pipeline is not over-limited, judging whether the flow rate of the detected pipeline is over-limited, if so, alarming, and closing the corresponding valve;
judging whether the pressure difference between the inlet and the outlet exceeds the standard, if so, alarming, and closing the corresponding valve;
judging whether the condition for preventing the gas interruption protection is met, and if so, alarming;
the above conditions are that the check pipeline regulating valve and the bypass regulating valve are closed at the same time.
In a second aspect, the present application provides a natural gas flow meter calibration device, referring to a block diagram of a natural gas flow meter calibration device 2 shown in fig. 3, the device comprises:
a receiving module 21, configured to receive a verification request sent by a client, where the verification request carries a type of a flow meter to be verified and a plurality of flow points;
a first determining module 22, configured to determine a target standard pipeline related to the flow meter to be calibrated according to the type of the flow meter to be calibrated;
the control module 23 is used for controlling the opening and closing of the valve on the target standard meter pipeline so as to realize the flow of the flow point;
a second determining module 24, configured to determine a verification result of the flow meter under verification at each flow point;
a third determining module 25, configured to determine a comprehensive verification result of the flow meter to be verified according to the verification result of each flow point;
and the sending module 26 is configured to send the comprehensive verification result to the client.
In one embodiment, the method further comprises: a verification module 27, configured to, for each verification of each flow point, obtain, after the verification is completed, verification parameters of the flow point at that time;
in response to determining that the assay is invalid based on the assay parameters, the assay is continued for the flow point.
In one embodiment, the assay parameters include: flow, temperature and pressure;
the verification module 27 is further configured to determine a flow difference between the flow and a predetermined flow threshold, and determine that the assay is invalid in response to the flow difference being greater than the predetermined flow difference threshold;
determining a temperature of the gas at the flow point, determining that the assay is invalid in response to a change in the temperature being greater than a predetermined temperature change threshold;
determining a pressure fluctuation ratio of the flow point, and determining that the assay is invalid in response to the pressure fluctuation ratio being greater than a predetermined pressure fluctuation ratio threshold.
In one embodiment, the second determining module 24 is further configured to determine, for each flow point, a verification result of the verified flow meter based on the verification parameter of the flow point after the verification is completed in response to determining that the verification is valid based on the verification parameter, specifically including:
determining a corresponding accuracy class table according to the type of the flow meter to be verified;
and determining a verification result according to the accuracy class table.
In one embodiment, the system further comprises a first protection alarm module 28 for acquiring the instantaneous flow of each standard meter pipeline in real time;
responding to the fact that the flow of any standard table pipeline is equal to or greater than a preset first flow threshold and smaller than a preset second flow threshold, and sending a first alarm message to the client;
responding to the flow of any standard table pipeline of the item standard table to be equal to or larger than a preset second flow threshold value, and sending a second alarm message to the client;
the second alarm message has a priority higher than the first alarm message.
In one embodiment, the system further comprises a second protection alarm module 29, configured to obtain, in real time, the instantaneous flow of each flow meter pipeline to be calibrated;
responding to the fact that the flow of any detected flow meter pipeline is larger than or equal to a preset third flow threshold and smaller than a preset fourth flow threshold, and sending a third alarm message to the client;
responding to the condition that the flow of any standard table pipeline is equal to or greater than a preset fourth flow threshold value, and sending a fourth alarm message to the client;
the fourth alarm message has a higher priority than the third alarm message.
In one embodiment, the system further comprises a third protection alarm module 210, configured to obtain the in-out pressure difference and the pressure drop rate in real time;
and sending a fifth alarm message to the client in response to the in-out differential pressure being equal to or greater than a predetermined differential pressure threshold and/or the pressure drop rate being equal to or greater than a predetermined pressure drop rate threshold.
In a third aspect, the present application provides a natural gas flow meter verification apparatus, see fig. 4, comprising:
a processor 41; a memory 42 for storing instructions executable by the processor 41;
wherein the processor 41 is configured to execute the executable instructions to implement the method of any of the above.
In a fourth aspect, the present application proposes a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any of the preceding claims.
In the embodiment of the invention, the processor may be an integrated circuit chip with signal processing capability. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP for short), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), a field programmable gate array (Field Programmable Gate Array, FPGA for short), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
Various methods, steps, and logic blocks of the applications in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method applied in connection with the embodiments of the present invention may be embodied directly in hardware, in a decoding processor, or in a combination of hardware and software modules in the decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The processor reads the information in the storage medium and, in combination with its hardware, performs the steps of the above method.
The storage medium may be memory, for example, may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory.
The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable ROM (Electrically EPROM, EEPROM), or a flash Memory.
The volatile memory may be a random access memory (Random Access Memory, RAM for short) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (Direct Rambus RAM, DRRAM).
The storage media described in embodiments of the present invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in a combination of hardware and software. When the software is applied, the corresponding functions may be stored in a computer-readable medium or transmitted as one or more instructions or code on the computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
It will be apparent to those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method of calibrating a natural gas flow meter, comprising:
receiving a verification request sent by a client, wherein the verification request carries the type of a verified flow meter and a plurality of flow points;
determining a target standard pipeline related to the flow meter to be verified according to the type of the flow meter to be verified;
controlling the valve on the target standard meter pipeline to be opened and closed so as to realize the flow of the flow point;
determining the verification result of the verified flowmeter at each flow point;
determining the comprehensive verification result of the verified flowmeter according to the verification result of each flow point;
and sending the comprehensive verification result to the client.
2. The method of calibrating a natural gas flow meter according to claim 1,
for each verification of each flow point, after the verification is completed, obtaining verification parameters of the flow point;
in response to determining that the assay is invalid based on the assay parameters, the assay is continued for the flow point.
3. The method of calibrating a natural gas flow meter according to claim 1,
the assay parameters include: flow, temperature and pressure;
determining that the assay is invalid based on the assay parameters, comprising:
determining a flow difference between the flow and a predetermined flow threshold, and determining that the assay is invalid in response to the flow difference being greater than the predetermined flow difference threshold;
determining a temperature of the gas at the flow point, determining that the assay is invalid in response to a change in the temperature being greater than a predetermined temperature change threshold;
determining a pressure fluctuation ratio of the flow point, and determining that the assay is invalid in response to the pressure fluctuation ratio being greater than a predetermined pressure fluctuation ratio threshold.
4. The method of calibrating a natural gas flow meter according to claim 1,
for each flow point, after the assay is completed, in response to determining that the assay is valid according to the assay parameters, the method further comprises: determining the verification result of the verified flowmeter according to the verification parameters of the flow point, which comprises the following steps:
determining a corresponding accuracy class table according to the type of the flow meter to be verified;
and determining a verification result according to the accuracy class table.
5. The natural gas flow meter verification method of claim 1, further comprising:
acquiring the instantaneous flow of each standard table pipeline in real time;
responding to the fact that the flow of any standard table pipeline is equal to or greater than a preset first flow threshold and smaller than a preset second flow threshold, and sending a first alarm message to the client;
responding to the flow of any standard table pipeline of the item standard table to be equal to or larger than a preset second flow threshold value, and sending a second alarm message to the client;
the second alarm message has a priority higher than the first alarm message.
6. The natural gas flow meter verification method of claim 1, further comprising:
acquiring the instantaneous flow of each flow meter pipeline to be calibrated in real time;
responding to the fact that the flow of any detected flow meter pipeline is larger than or equal to a preset third flow threshold and smaller than a preset fourth flow threshold, and sending a third alarm message to the client;
responding to the condition that the flow of any standard table pipeline is equal to or greater than a preset fourth flow threshold value, and sending a fourth alarm message to the client;
the fourth alarm message has a higher priority than the third alarm message.
7. The natural gas flow meter verification method of claim 1, further comprising:
acquiring the pressure difference and the pressure drop rate of the in-out station in real time;
and sending a fifth alarm message to the client in response to the in-out differential pressure being equal to or greater than a predetermined differential pressure threshold and/or the pressure drop rate being equal to or greater than a predetermined pressure drop rate threshold.
8. A natural gas flow meter verification device, comprising:
the verification module is used for receiving a verification request sent by the client, wherein the verification request carries the type of a verified flow meter and a plurality of flow points;
the first determining module is used for determining a target standard pipeline related to the flow meter to be detected according to the type of the flow meter to be detected;
the control module is used for controlling the opening and closing of a valve on the target standard meter pipeline so as to realize the flow of the flow point;
the second determining module is used for determining the verification result of the verified flowmeter at each flow point;
the third determining module is used for determining the comprehensive verification result of the verified flowmeter according to the verification result of each flow point;
and the sending module is used for sending the comprehensive verification result to the client.
9. A natural gas flow meter verification apparatus, comprising:
a processor; a memory for storing processor-executable instructions;
wherein the processor is configured to execute the executable instructions to implement the method of any one of claims 1 to 7.
10. A non-transitory computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the method of any of claims 1 to 7.
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