CN117968803A - Gas meter testing method, device, controller and storage medium - Google Patents
Gas meter testing method, device, controller and storage medium Download PDFInfo
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Abstract
The application provides a gas meter testing method, a device, a controller and a storage medium, wherein the method comprises the following steps: when the gas meter enters a test mode and after the gas flow is monitored to be stable, acquiring the temperature and the pressure acquired by the sensing equipment when one current working condition pulse signal is acquired each time, determining the current working condition pulse signal time corresponding to the current working condition pulse signal, and calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent; calculating to obtain the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent; the photoelectric element is controlled to output the standard condition accumulation volume signal to the gas meter testing device according to the time interval, so that the testing device performs standard condition error test on the gas meter according to the standard condition accumulation volume signal, the accuracy of the standard condition error test of the gas meter is improved, and the testing efficiency is improved.
Description
Technical Field
The application relates to the technical field of gas meters, in particular to a gas meter testing method, a device, a controller and a storage medium.
Background
The gas meter is a metering device which is specially used for measuring and recording the accumulated volume of the gas standard conditions in the natural gas conveying process. It can help natural gas suppliers and users monitor the use of gas, and count and control the use amount of gas.
The upstream gas purchase of the gas company is settled under standard conditions, but the actual use of the terminal user is performed under working conditions. Under different temperature or pressure climates, the two can generate larger metering errors. For example, at 20℃,1 cubic meter of natural gas at 101.325kPa at-10℃, 103kPa volume is 0.883m, the volume is reduced by 11.7%. This results in gas volume metering errors, which lead to unbalanced supply and sales, losing the fairness principle of trade settlement. The metering volume of the base meter of the gas meter is working condition, and the acquired temperature and pressure are converted into standard condition volume.
In the prior art, the traditional gas meter test principle is as follows: the electromechanical conversion device (Hall element) converts the mechanical working condition volume pulse signal into an electronic working condition volume pulse (electromechanical conversion signal equivalent f) so as to realize the Q-work metering of the electronic working condition volume; a temperature and/or pressure sensor is built in, and the temperature and/or pressure of the gas in the pipeline are collected; the controller corrects the electronic working condition volume according to the acquired temperature T and/or pressure P, and if the correction coefficient is k, k is f to realize the Q standard measurement of the electronic standard condition volume; the gas meter is listed in a mandatory verification catalog, standard condition errors need to be verified, the current gas meter verification device cannot collect signals of the electronic counter, and only signals of the standard condition accumulation volume can be collected through signals sent by the photoelectric element.
The photoelectric element sends out 1 signal to output the standard condition accumulation volume when the standard condition accumulation volume of the electronic standard condition volume Q is more than 1 and less than 2 standard condition pulse equivalent F, and sends out 2 signals when the standard condition accumulation volume is more than 2 and less than 3 standard condition pulse equivalent F; and similarly, outputting the final standard condition accumulation volume, and realizing detection information exchange with a gas meter testing device, wherein the testing device is used for pattern evaluation and metering calibration time scale error test of the electronic temperature and pressure correction film type gas meter.
The electromechanical conversion signal equivalent F and the standard pulse equivalent F may be the same or different. The controller sends out standard condition pulse and receives the corresponding relation that can exist between the two because of temperature T and/or pressure P are different, and k value just is not necessarily 1, leads to the signal that photoelectric element output to have very big error, directly influences the test accuracy. The electromechanical conversion signal equivalent F and the standard pulse equivalent F are key parameters, which need to be fixed and are marked on the table.
For example, if the electromechanical conversion signal equivalent f=the standard pulse equivalent f=10l and the temperature and/or pressure induced correction k is 1.5, k×f=15, then one standard pulse is converted to a standard volume of 15L and the photocell output signal is measured by the gas meter test device to be 10L; if the correction value k is 0.9, k=f=9, then one working condition pulse is converted to less than 1 standard condition pulse triggering condition, and two working condition pulses are converted to 18L, and the output signal of the photoelectric element is measured to be 10L by the testing device. The actual standard condition volumes are 15L and 18L, the output signals of the photoelectric elements are 1, the measurement of the test device is 10L, and obvious deviation exists. Therefore, in the prior art, the standard condition volume is displayed through the output signal of the photoelectric element, and the form of the standard condition volume acquired by the testing device seriously influences the accuracy of the gas standard condition error test.
Disclosure of Invention
The application provides a gas meter testing method, a device, a controller and a storage medium, which are used for solving the problem that the accuracy of gas standard condition error testing is seriously affected by the form of displaying standard condition volume through a photoelectric element output signal and collecting the standard condition volume by a testing device.
In a first aspect, the present application provides a gas meter testing method, applied to a controller of a gas meter, including:
When a gas meter enters a test mode, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter, and determining corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time;
After the stable gas flow is monitored, when one current working condition pulse signal is obtained each time, acquiring the temperature and the pressure acquired by the sensing equipment, determining the current working condition pulse signal time corresponding to the current working condition pulse signal, and calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent;
calculating to obtain the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent;
And controlling the photoelectric element to output a standard condition accumulation volume signal to a gas meter testing device according to the time interval, so that the testing device tests the gas meter according to the standard condition accumulation volume signal.
In one possible design, before the continuously periodically acquiring the preset number of working condition pulse signals corresponding to the gas flow of the gas meter, the method further includes: acquiring a working condition pulse signal output by an electromechanical conversion device; determining corresponding working condition pulse signal time according to the working condition pulse signal; comparing the working condition pulse signal time with the demarcation working condition pulse signal time; if the working condition pulse signal time is greater than the demarcation working condition pulse signal time, determining that the gas flow is low-area flow; if the working condition pulse signal time is smaller than or equal to the demarcation working condition pulse signal time, determining that the gas flow is high-area flow; correspondingly, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter, and determining corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable according to the preset number of working condition pulse signal time, including: if the gas flow is the low-area flow, continuously and periodically acquiring a first preset number of working condition pulse signals corresponding to the low-area flow, and determining corresponding first preset number of working condition pulse signal time according to the first preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the first preset number of working condition pulse signal time; if the gas flow is the high-area flow, continuously and periodically acquiring a second preset number of working condition pulse signals corresponding to the high-area flow, and determining the corresponding second preset number of working condition pulse signal time according to the second preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the second preset number of working condition pulse signal time.
In one possible design, the continuously monitoring whether the gas flow is stable according to the first preset number of operating condition pulse signal time includes: calculating the difference ratio between each working condition pulse signal time and the next working condition pulse signal in the first preset number of working condition pulse signal times; if all the difference ratios are smaller than or equal to a first stable threshold value, determining that the gas flow is stable; and if any difference ratio is larger than the first stable threshold value, determining that the gas flow is unstable.
In one possible design, the calculating the difference ratio between each duty pulse signal time and the following duty pulse signal in the first preset number of duty pulse signal times includes:
Wherein, W ni is the difference ratio of the ith working condition pulse signal time and the (i+1) th working condition pulse signal time; t ni is the time of the ith working condition pulse signal; t n(i+1) is the i+1th working condition pulse signal time.
In one possible design, the calculating formula is that, according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent, the current standard condition instantaneous flow corresponding to the current working condition pulse signal is calculated:
Wherein q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
In one possible design, the time interval for calculating the output signal of the photoelectric element according to the current target condition instantaneous flow and the target condition pulse equivalent is calculated by the following formula:
Wherein, t Ni is a time interval corresponding to the fuel gas for delivering a standard condition pulse equivalent under the state of the standard condition instantaneous flow corresponding to the ith working condition pulse signal; q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the standard condition pulse equivalent; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
In a second aspect, the present application provides a gas meter testing device, applied to a controller, comprising:
The monitoring module is used for continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter when the gas meter enters a test mode, and determining the corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time;
The first calculation module is used for acquiring the temperature and the pressure acquired by the sensing equipment when one current working condition pulse signal is acquired each time after the gas flow is monitored to be stable, determining the current working condition pulse signal time corresponding to the current working condition pulse signal, and calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent;
the second calculation module is used for calculating the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent;
and the testing module is used for controlling the photoelectric element to output a standard condition accumulated volume signal to the gas meter testing device according to the time interval so that the testing device can perform standard condition error testing on the gas meter according to the standard condition accumulated volume signal.
In a third aspect, the present application provides a controller comprising: at least one processor and memory;
the memory stores computer-executable instructions;
The at least one processor executes computer-executable instructions stored in the memory, causing the at least one processor to perform the gas meter test method as described above in the first aspect and the various possible designs of the first aspect.
In a fourth aspect, the present application provides a computer storage medium having stored therein computer-executable instructions which, when executed by a processor, implement the gas meter test method according to the first aspect and the various possible designs of the first aspect.
In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the gas meter test method of the first aspect and the various possible designs of the first aspect.
According to the gas meter testing method, the device, the controller and the storage medium, when the gas meter enters a testing mode and after the gas flow is monitored to be stable, the temperature and the pressure acquired by the sensing equipment are acquired when one current working condition pulse signal is acquired each time, the current working condition pulse signal time corresponding to the current working condition pulse signal is determined, and the current standard condition instantaneous flow corresponding to the current working condition pulse signal is calculated according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent; calculating to obtain the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent; the photoelectric element is controlled to output a gas standard condition accumulation volume signal to the gas meter testing device according to the time interval, so that the testing device tests the gas meter according to the gas standard condition accumulation volume signal, and the time interval for outputting the gas standard condition accumulation volume signal is determined according to the current standard condition instantaneous flow and the standard condition pulse equivalent, so that the difference between the gas standard condition accumulation volume and the actual difference is smaller, and the accuracy of gas standard condition error testing is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of an application scenario of a gas meter test method according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a gas meter testing method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a second flow chart of a gas meter testing method according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a gas meter testing device according to an embodiment of the present application;
fig. 5 is a schematic hardware structure of a controller according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In order to solve the technical problems in the background art, the embodiments of the present application provide the following technical ideas: the inventor considers that the error of measuring the volume of the electronic standard condition by combining the temperature and pressure correction value with the standard condition pulse equivalent is larger in the prior art, obtains a plurality of variables corresponding to the temperature, the pressure and the time of the operating condition pulse signal based on the operating condition pulse signal after the gas flow is stable, and processes the plurality of variables by utilizing a preset formula to obtain the instantaneous flow corresponding to the operating condition pulse signal; the corresponding time interval of the output signal is obtained through the instantaneous flow, and the output signal is sent to the gas meter testing device according to the time interval, so that the testing device tests the gas meter according to the output signal, the standard condition accumulation volume is smaller than the actual standard condition accumulation volume, and the accuracy of the standard condition error test is improved.
Fig. 1 is a schematic diagram of an application scenario of a gas meter testing method according to an embodiment of the present application.
As shown in fig. 1, the scene includes: a gas meter 10 and a gas meter testing device 20.
The gas meter 10 comprises a controller 101, an electromechanical conversion device 102, a photoelectric element 103 and a sensing device 104, and the gas meter 10 further comprises a character wheel and magnetic steel.
The electromechanical conversion device 102, which may be a hall element, is configured to output an operating pulse signal.
The photocell 103, which may be an LED lamp, is used to output a signal.
The sensing device 104 includes a temperature sensor 1041 and a pressure sensor 1042.
The temperature sensor 1041 is configured to obtain a temperature T corresponding to the gas flow.
The pressure sensor 1042 is used for acquiring the pressure P corresponding to the gas flow.
The gas meter 10 specifically includes: the controller 101 acquires a working condition pulse signal output by the electromechanical conversion device 102 and judges the speed of the gas flow according to the working condition pulse signal; determining corresponding stability according to the gas flow at different speeds, and acquiring the temperature and pressure of the gas flow corresponding to the pulse signal under the current working condition acquired by the sensing equipment 104 after the gas flow is stable; calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to a plurality of numerical values such as temperature, pressure and the like, and calculating the time interval of the output signal of the photoelectric element 103 according to the current standard condition instantaneous flow; the control photocell 103 outputs a standard cumulative volume signal to the gas meter test apparatus 20 according to the time interval.
The gas meter test device 20 specifically includes: the gas meter test device 20 performs a standard condition error test on the gas meter 10 according to the standard condition cumulative volume signal.
Fig. 2 is a schematic flow chart of a gas meter testing method according to an embodiment of the present application, where the execution subject of the embodiment may be the controller in the embodiment shown in fig. 1, and the embodiment is not limited herein.
As shown in fig. 2, the method includes:
s201: when the gas meter enters a test mode, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter, and determining corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time.
In this embodiment, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter specifically includes:
And taking the preset number as a period, and continuously acquiring working condition pulse signals corresponding to the preset number and corresponding to the gas flow of the gas meter.
Wherein, the pulse signal of each working condition is not repeatedly acquired.
In this embodiment, if the number of the same operating condition pulse signal time in the preset number of operating condition pulse signal times is equal to or greater than the threshold number, it is determined that the gas flow is stable.
For example, if the preset number of working condition pulse signal times is 3 working condition pulse signal times and the threshold number is a value of 2, the gas flow is determined to be stable when 2 working condition pulse signal times in the 3 working condition pulse signal times have the same size.
S202: after the stable gas flow is monitored, when one current working condition pulse signal is obtained each time, the temperature and the pressure which are collected by the sensing equipment are obtained, the current working condition pulse signal time corresponding to the current working condition pulse signal is determined, and the current standard condition instantaneous flow corresponding to the current working condition pulse signal is calculated according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent.
In this embodiment, the temperature and pressure acquired by the sensing device are specifically: and acquiring the temperature corresponding to the gas flow acquired by the temperature sensor and the pressure corresponding to the gas flow acquired by the pressure sensor.
In this embodiment, a calculation formula for calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal is as follows:
Wherein q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
S203: and calculating the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent.
In this embodiment, the time interval of the output signal is the time interval corresponding to the fuel gas delivering a standard pulse equivalent.
In the present embodiment, the unit of the standard pulse equivalent may be L (L) or another measurement unit.
The standard pulse equivalent is one unit volume, and the unit volume may be any one of 1L, 10L or 20L, or may be other volumes.
In this embodiment, the standard pulse equivalent and the electromechanical conversion signal equivalent may be the same volume or different volumes.
Wherein the standard pulse equivalent and the electromechanical conversion signal equivalent are fixed values.
In this embodiment, the calculation formula for calculating the time interval of the output signal of the photoelectric element is:
Wherein, t Ni is a time interval corresponding to the fuel gas for delivering a standard condition pulse equivalent under the state of the standard condition instantaneous flow corresponding to the ith working condition pulse signal; q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is standard condition pulse equivalent; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
For example, if the standard pulse equivalent and the electromechanical conversion signal equivalent volume are the same, the time interval of the output signal of the photoelectric element is calculated according to the following calculation formula:
S204: and controlling the photoelectric element to output a standard condition accumulation volume signal to the gas meter testing device according to the time interval, so that the testing device performs standard condition error testing on the gas meter according to the standard condition accumulation volume signal.
In this embodiment, the photocell may be an LED lamp, an infrared lamp, or other element.
In this embodiment, the gas standard condition accumulated volume signal may be one or more LED lamp flash signals, infrared lamp flash signals or other signals, and the number of gas standard condition accumulated volume signals is generated by sequentially accumulating the number of last output signals.
The photoelectric element is controlled to flash for two times according to the time interval, and the flash of the LED lamp triggers the sensing device of the gas meter testing device, so that the testing device determines the corresponding standard condition accumulation volume according to the flash of the LED lamp for two times and the standard condition pulse equivalent, and tests the gas meter according to the standard condition accumulation volume.
In summary, according to the gas meter testing method provided by the embodiment, when the gas meter enters a testing mode and after the gas flow is monitored to be stable, when one current working condition pulse signal is obtained each time, the temperature and the pressure acquired by the sensing equipment are obtained, the current working condition pulse signal time corresponding to the current working condition pulse signal is determined, and the current standard condition instantaneous flow corresponding to the current working condition pulse signal is calculated according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent; calculating to obtain the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent; the photoelectric element is controlled to output a gas standard condition accumulation volume signal to the gas meter testing device according to the time interval, so that the testing device tests the gas meter according to the gas standard condition accumulation volume signal, and the time interval of the output signal is determined according to the current standard condition instantaneous flow and the standard condition pulse equivalent, so that the difference between the standard condition accumulation volume and the actual is smaller, and the accuracy of standard condition error testing is improved.
In addition, the gas meter provided by the embodiment can meet the requirement of automatic test, does not need additional operations such as manual reading and the like, and improves the test efficiency.
Fig. 3 is a schematic flow chart diagram of a gas meter test method according to an embodiment of the present application, in the embodiment of the present application, a preset number of operating condition pulse signals corresponding to a gas flow of a gas meter are continuously and periodically obtained, and a corresponding preset number of operating condition pulse signal times are determined according to the preset number of operating condition pulse signals, when the gas meter enters a test mode in S201; the method is characterized in that whether the gas flow is stable or not is continuously monitored according to the preset number of working condition pulse signal time. As shown in fig. 3, the method includes:
S301: when the gas meter enters a test mode, a working condition pulse signal output by the electromechanical conversion device is obtained.
In this embodiment, the operation modes of the gas meter include a test mode and a user mode.
The test mode and the user mode can be operated simultaneously without mutual influence, and the metering results of the test mode and the user mode meet the consistency requirement.
The user mode is used for daily operation of the gas meter.
The test mode is used for rapidly meeting the test requirements of type evaluation, metering verification and the like of the gas meter.
In this embodiment, the electromechanical conversion device may be a hall element or other electronic element.
For example, when the character wheel rotates, the working condition pulse signal can be induced by the Hall element according to the magnetic steel on the character wheel.
S302: and determining the corresponding working condition pulse signal time according to the working condition pulse signal.
In this embodiment, the working condition pulse signal time is a duration corresponding to the working condition pulse signal.
S303: and comparing the working condition pulse signal time with the demarcation working condition pulse signal time.
In this embodiment, the calculation formula of the demarcation condition pulse signal time is:
Wherein t t is the boundary working condition pulse signal time; f is the electromechanical conversion signal equivalent; q t is the demarcation flow of the gas meter.
The unit of the working condition pulse signal time and the demarcation working condition pulse signal time can be seconds (S) or other timing units.
The unit of the equivalent of the electromechanical conversion signal may be liter (L) or other measurement units.
The equivalent of the electromechanical conversion signal is a basic volume, and the basic volume can be any one of 1L, 5L or 10L, and can also be other volumes.
The unit of demarcation flow of the gas meter is cubic meter per hour (m 3/h).
S304: if the working condition pulse signal time is greater than the demarcation working condition pulse signal time, determining that the gas flow of the gas meter is the low area flow; and if the working condition pulse signal time is less than or equal to the demarcation working condition pulse signal time, determining that the gas flow is the high area flow.
S305: if the gas flow is the low-area flow, continuously and periodically acquiring a first preset number of working condition pulse signals corresponding to the low-area flow, and determining corresponding first preset number of working condition pulse signal time according to the first preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the first preset number of working condition pulse signal time.
In this embodiment, continuously and periodically acquiring the first preset number of working condition pulse signals specifically includes: and taking the first preset number as a period, and continuously acquiring working condition pulse signals corresponding to the first preset number.
Wherein, the pulse signal of each working condition is not repeatedly acquired.
In this embodiment, if the number of the same operating condition pulse signal time in the first preset number of operating condition pulse signal times is greater than or equal to the threshold number, it is determined that the gas flow is stable.
For example, if the first preset number of working condition pulse signal times is 3 working condition pulse signal times and the threshold number is a value of 2, when 2 working condition pulse signal times in the 3 working condition pulse signal times have the same size, the gas flow is determined to be stable.
S306: if the gas flow is the high-area flow, continuously and periodically acquiring a second preset number of working condition pulse signals corresponding to the high-area flow, and determining the corresponding second preset number of working condition pulse signal time according to the second preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the second preset number of working condition pulse signal time.
In this embodiment, continuously and periodically acquiring the second preset number of working condition pulse signals specifically includes: and taking the second preset number as a period, and continuously acquiring working condition pulse signals corresponding to the second preset number.
Wherein, the pulse signal of each working condition is not repeatedly acquired.
In this embodiment, if the number of the same operating condition pulse signal time in the second preset number of operating condition pulse signal times is greater than or equal to the threshold number, it is determined that the gas flow is stable.
Wherein the second preset number is greater than the first preset number.
S307: after the stable gas flow is monitored, when one current working condition pulse signal is obtained each time, the temperature and the pressure which are collected by the sensing equipment are obtained, the current working condition pulse signal time corresponding to the current working condition pulse signal is determined, and the current standard condition instantaneous flow corresponding to the current working condition pulse signal is calculated according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent.
In this embodiment, the calculation formula for the sensing device and calculating the current standard instantaneous flow corresponding to the current working condition pulse signal has been described in detail in step S202, and will not be described here again.
S308: and calculating the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent.
In this embodiment, the calculation formula for the time interval of the output signal and the time interval of the output signal of the photoelectric element is already described in detail in step S203, and will not be described here again.
S309: and controlling the photoelectric element to output a standard condition accumulation volume signal to the gas meter testing device according to the time interval, so that the testing device performs standard condition error testing on the gas meter according to the standard condition accumulation volume signal.
In this embodiment, the details of the photocell and the standard accumulated volume signal have been described in step S204, and will not be described here.
As can be seen from the foregoing, in the gas meter testing method provided by the embodiment, stability judgment of the corresponding gas flow is performed by distinguishing the low-area flow from the high-area flow, if the gas flow is the low-area flow, a first preset number of working condition pulse signals corresponding to the low-area flow are continuously and periodically obtained, and corresponding first preset number of working condition pulse signal times are determined according to the first preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the first preset number of working condition pulse signal time; if the gas flow is the high-area flow, continuously and periodically acquiring a second preset number of working condition pulse signals corresponding to the high-area flow, and determining the corresponding second preset number of working condition pulse signal time according to the second preset number of working condition pulse signals; whether the gas flow is stable or not is continuously monitored according to the second preset number of working condition pulse signal time, so that the gas flow stability of different gas flow scenes can be monitored by the gas meter testing method, the accumulated volume and actual errors of the gas standard condition are further reduced, and the accuracy of the standard condition error test is improved.
Based on the embodiment provided in fig. 3, in the embodiment of the present application, the detailed description is given for continuously monitoring whether the gas flow is stable according to the first preset number of operating mode pulse signal time in S305. The method comprises the following steps:
s3051: and calculating the difference ratio between each working condition pulse signal time and the next working condition pulse signal in the first preset number of working condition pulse signal times.
In this embodiment, the gas flow corresponding to the first preset number of working condition pulse signal times is the low area flow.
For example, the first preset number of duty pulse signal times are t n1、tn2 and t n3.
In this embodiment, the calculation formula of the difference ratio between the time of each working condition pulse signal and the following working condition pulse signal is:
Wherein, W ni is the difference ratio of the ith working condition pulse signal time and the (i+1) th working condition pulse signal time; t ni is the time of the ith working condition pulse signal; t n(i+1) is the i+1th working condition pulse signal time.
S3052: and if all the difference ratios are smaller than or equal to the first stability threshold, determining that the gas flow is stable.
In this embodiment, the first stability threshold is W L.
Specifically, if |w n1|、|Wn2 | and |w n3 | satisfy |w ni|≤WL, the gas flow is stable.
S3053: if any difference ratio is greater than the first stability threshold, then the gas flow is determined to be unstable.
Specifically, if any one of |w n1|、|Wn2 | and |w n3 | satisfies |w ni|>WL, the gas flow is unstable.
In the present embodiment, if the gas flow is unstable, the subsequent flow is stopped.
As can be seen from the above, in the gas meter testing method provided in this embodiment, the difference ratio between each working condition pulse signal time and the following working condition pulse signal in the first preset number of working condition pulse signal times is calculated; if all the difference ratios are smaller than or equal to a first stability threshold, determining that the gas flow is stable; if any difference ratio is larger than the first stability threshold, the unstable gas flow is determined, so that whether the gas flow is stable or not can be continuously monitored, and the accuracy of the standard condition error test is improved.
In addition, if the gas flow is unstable, the subsequent flow is stopped, so that errors caused by the instability of the gas flow are avoided.
Based on the embodiment provided in fig. 3, in the embodiment of the present application, whether the gas flow is stable is continuously monitored with respect to the second preset number of operating mode pulse signal time in S306. The method comprises the following steps:
s3061: and calculating the difference ratio between each working condition pulse signal time and the next working condition pulse signal in the second preset number of working condition pulse signal times.
In this embodiment, the gas flow corresponding to the second preset number of working condition pulse signal times is the high area flow.
For example, the second predetermined number of duty pulse signal times are t n1、tn2、tn3、tn4、tn5 and t n6.
In this embodiment, the calculation formula of the difference ratio between the time of each working condition pulse signal and the following working condition pulse signal is:
Wherein, W ni is the difference ratio of the ith working condition pulse signal time and the (i+1) th working condition pulse signal time; t ni is the time of the ith working condition pulse signal; t n(i+1) is the i+1th working condition pulse signal time.
S3062: and if all the difference ratios are smaller than or equal to the second stability threshold, determining that the gas flow is stable.
In this embodiment, the second stability threshold is W H.
Specifically, if |w n1|、|Wn2|、|Wn3|、|Wn4|、|Wn5 | and |w n6 | satisfy |w ni|≤WH, the gas flow is stable.
S3063: and if any difference ratio is larger than the second stable threshold value, determining that the gas flow is unstable.
Specifically, if any one of |w n1|、|Wn2|、|Wn3|、|Wn4|、|Wn5 | and |w n6 | satisfies |w ni|>WH, the gas flow is unstable.
In the present embodiment, if the gas flow is unstable, the subsequent flow is stopped.
As can be seen from the above, in the gas meter testing method provided in this embodiment, the difference ratio between each working condition pulse signal time and the following working condition pulse signal in the second preset number of working condition pulse signal times is calculated; if all the difference ratios are smaller than or equal to the second stability threshold, determining that the gas flow is stable; if any difference ratio is larger than the second stability threshold, the unstable gas flow is determined, so that whether the gas flow is stable or not can be continuously monitored, and the accuracy of the standard condition error test is improved.
In addition, if the gas flow is unstable, the subsequent flow is stopped, so that errors caused by the instability of the gas flow are avoided.
Fig. 4 is a schematic structural diagram of a gas meter testing device according to an embodiment of the present application. As shown in fig. 4, the gas meter test apparatus includes: a monitoring module 401, a first computing module 402, a second computing module 403, and a testing module 404.
The monitoring module 401 is configured to continuously and periodically obtain a preset number of working condition pulse signals corresponding to a gas flow of the gas meter when the gas meter enters a test mode, and determine a corresponding preset number of working condition pulse signal times according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time;
the first calculating module 402 is configured to, after the gas flow is monitored to be stable, obtain, when one current working condition pulse signal is obtained each time, obtain a temperature and a pressure collected by the sensing device, determine a current working condition pulse signal time corresponding to the current working condition pulse signal, and calculate a current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and an electromechanical conversion signal equivalent;
A second calculating module 403, configured to calculate a time interval of the output signal of the photoelectric element according to the current target condition instantaneous flow and the target condition pulse equivalent;
And the testing module 404 is used for controlling the photoelectric element to output a gas standard condition accumulation volume signal to a gas meter testing device according to the time interval, so that the testing device performs standard condition error testing on the gas meter according to the standard condition accumulation volume signal.
In one possible implementation, the apparatus further includes:
the acquisition module 405 is configured to acquire a working condition pulse signal output by the electromechanical conversion device;
A first determining module 406, configured to determine a corresponding operating mode pulse signal time according to the operating mode pulse signal;
a comparison module 407, configured to compare the working condition pulse signal time with the demarcation working condition pulse signal time;
A second determining module 408, configured to determine that the gas flow is a low-area flow if the working condition pulse signal time is greater than the demarcation working condition pulse signal time; if the working condition pulse signal time is smaller than or equal to the demarcation working condition pulse signal time, determining that the gas flow is high-area flow;
accordingly, the monitoring module 401 specifically includes:
The first monitor unit 4011 is configured to continuously and periodically obtain a first preset number of working condition pulse signals corresponding to the low area flow if the gas flow is the low area flow, and determine a corresponding first preset number of working condition pulse signal times according to the first preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the first preset number of working condition pulse signal time;
The second monitor unit 4012 is configured to continuously and periodically obtain a second preset number of working condition pulse signals corresponding to the high-area flow if the gas flow is the high-area flow, and determine a corresponding second preset number of working condition pulse signal times according to the second preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the second preset number of working condition pulse signal time.
In one possible implementation manner, the first monitoring unit 4011 specifically includes:
A calculating unit 40111, configured to calculate a difference ratio between each of the first preset number of duty pulse signal times and a subsequent duty pulse signal;
A first determining unit 40112, configured to determine that the gas flow is stable if all the difference ratios are less than or equal to a first stability threshold;
the second determining unit 40113 is configured to determine that the gas flow is unstable if any difference ratio is greater than the first stable threshold.
In one possible implementation manner, the calculating a difference ratio between each working condition pulse signal time and the following working condition pulse signal in the first preset number of working condition pulse signal times is given by a calculation formula:
Wherein, W ni is the difference ratio of the ith working condition pulse signal time and the (i+1) th working condition pulse signal time; t ni is the time of the ith working condition pulse signal; t n(i+1) is the i+1th working condition pulse signal time.
In one possible implementation manner, the calculating formula for calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent is as follows:
Wherein q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
In one possible implementation manner, the calculating formula of the time interval of the output signal of the photoelectric element according to the current target condition instantaneous flow and the target condition pulse equivalent is as follows:
Wherein, t Ni is a time interval corresponding to the fuel gas for delivering a standard condition pulse equivalent under the state of the standard condition instantaneous flow corresponding to the ith working condition pulse signal; q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the standard condition pulse equivalent; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
The device provided in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein again.
Fig. 5 is a schematic hardware structure of a controller according to an embodiment of the present application. As shown in fig. 5, the controller of the present embodiment includes: a processor 501 and a memory 502; the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory to cause the at least one processor to perform the gas meter test method as described above.
Alternatively, the memory 502 may be separate or integrated with the processor 501.
When the memory 502 is provided separately, the controller further comprises a bus 503 for connecting said memory 502 and the processor 501.
The embodiment of the application also provides a computer storage medium, wherein computer execution instructions are stored in the computer storage medium, and when a processor executes the computer execution instructions, the gas meter testing method is realized.
The embodiment of the application also provides a computer program product, which comprises a computer program, wherein the computer program realizes the gas meter testing method when being executed by a processor.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.
The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.
In addition, each functional module in the embodiments of the present application may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.
The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or processor to perform some of the steps of the methods described in the various embodiments of the application.
It should be appreciated that the Processor may be a central processing unit (Central Processing Unit, abbreviated as CPU), or may be other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, abbreviated as DSP), application SPECIFIC INTEGRATED Circuit (ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.
The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or to one type of bus.
The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an Application SPECIFIC INTEGRATED Circuits (ASIC). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (10)
1. The gas meter testing method is characterized by being applied to a controller of a gas meter and comprising the following steps of:
When a gas meter enters a test mode, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter, and determining corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time;
After the stable gas flow is monitored, when one current working condition pulse signal is obtained each time, acquiring the temperature and the pressure acquired by the sensing equipment, determining the current working condition pulse signal time corresponding to the current working condition pulse signal, and calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent;
calculating to obtain the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent;
and controlling the photoelectric element to output a standard condition accumulation volume signal to a gas meter testing device according to the time interval, so that the testing device performs standard condition error testing on the gas meter according to the standard condition accumulation volume signal.
2. The method of claim 1, further comprising, prior to the continuously periodically acquiring a preset number of operating condition pulse signals corresponding to a gas flow rate of the gas meter:
Acquiring a working condition pulse signal output by an electromechanical conversion device;
determining corresponding working condition pulse signal time according to the working condition pulse signal;
comparing the working condition pulse signal time with the demarcation working condition pulse signal time;
if the working condition pulse signal time is greater than the demarcation working condition pulse signal time, determining that the gas flow is low-area flow; if the working condition pulse signal time is smaller than or equal to the demarcation working condition pulse signal time, determining that the gas flow is high-area flow;
Correspondingly, continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter, and determining corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable according to the preset number of working condition pulse signal time, including:
If the gas flow is the low-area flow, continuously and periodically acquiring a first preset number of working condition pulse signals corresponding to the low-area flow, and determining corresponding first preset number of working condition pulse signal time according to the first preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the first preset number of working condition pulse signal time;
if the gas flow is the high-area flow, continuously and periodically acquiring a second preset number of working condition pulse signals corresponding to the high-area flow, and determining the corresponding second preset number of working condition pulse signal time according to the second preset number of working condition pulse signals; and continuously monitoring whether the gas flow is stable or not according to the second preset number of working condition pulse signal time.
3. The method of claim 2, wherein continuously monitoring whether the gas flow is stable based on the first predetermined number of operating condition pulse signal times comprises:
Calculating the difference ratio between each working condition pulse signal time and the next working condition pulse signal in the first preset number of working condition pulse signal times;
If all the difference ratios are smaller than or equal to a first stable threshold value, determining that the gas flow is stable;
and if any difference ratio is larger than the first stable threshold value, determining that the gas flow is unstable.
4. A method according to claim 3, wherein the calculating the difference ratio between each of the first predetermined number of duty pulse signal times and the subsequent duty pulse signal is given by:
Wherein, W ni is the difference ratio of the ith working condition pulse signal time and the (i+1) th working condition pulse signal time; t ni is the time of the ith working condition pulse signal; t n(i+1) is the i+1th working condition pulse signal time.
5. The method according to any one of claims 1 to 4, wherein the calculating the current standard instantaneous flow corresponding to the current operating condition pulse signal according to the temperature and pressure, the current operating condition pulse signal time and the electromechanical conversion signal equivalent comprises the following calculation formula:
Wherein q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
6. The method according to claim 5, wherein the time interval for calculating the output signal of the photocell according to the current target instantaneous flow and the target pulse equivalent is calculated by the following formula:
Wherein, t Ni is a time interval corresponding to the fuel gas for delivering a standard condition pulse equivalent under the state of the standard condition instantaneous flow corresponding to the ith working condition pulse signal; q Ni is the standard condition instantaneous flow corresponding to the ith working condition pulse signal; p is the pressure of the gas flow corresponding to the ith working condition pulse signal; t is the temperature of the gas flow corresponding to the ith working condition pulse signal; f is the standard condition pulse equivalent; f is the electromechanical conversion signal equivalent; t ni is the i-th working condition pulse signal time.
7. A gas meter test device, characterized by being applied to a controller, comprising:
The monitoring module is used for continuously and periodically acquiring a preset number of working condition pulse signals corresponding to the gas flow of the gas meter when the gas meter enters a test mode, and determining the corresponding preset number of working condition pulse signal time according to the preset number of working condition pulse signals; continuously monitoring whether the gas flow is stable or not according to the preset number of working condition pulse signal time;
The first calculation module is used for acquiring the temperature and the pressure acquired by the sensing equipment when one current working condition pulse signal is acquired each time after the gas flow is monitored to be stable, determining the current working condition pulse signal time corresponding to the current working condition pulse signal, and calculating the current standard condition instantaneous flow corresponding to the current working condition pulse signal according to the temperature and the pressure, the current working condition pulse signal time and the electromechanical conversion signal equivalent;
the second calculation module is used for calculating the time interval of the output signal of the photoelectric element according to the current standard condition instantaneous flow and the standard condition pulse equivalent;
and the testing module is used for controlling the photoelectric element to output a standard condition accumulated volume signal to the gas meter testing device according to the time interval so that the testing device can perform standard condition error testing on the gas meter according to the standard condition accumulated volume signal.
8. A controller, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory, causing the at least one processor to perform the gas meter testing method of any one of claims 1 to 6.
9. A computer storage medium having stored therein computer executable instructions which, when executed by a processor, implement the gas meter test method of any one of claims 1 to 6.
10. A computer program product comprising a computer program which, when executed by a processor, implements the gas meter test method according to any one of claims 1 to 6.
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