CN113375765A - Measuring instrument detection method and device and storage medium - Google Patents
Measuring instrument detection method and device and storage medium Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 126
- 238000003860 storage Methods 0.000 title claims abstract description 15
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- 238000012216 screening Methods 0.000 claims description 21
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- 238000012360 testing method Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01F25/0084—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for measuring volume
Abstract
The embodiment of the application provides a detection method and a detection device of a metering device and a storage medium, wherein when fluid is controlled to be introduced into the metering device at a first flow rate, a plurality of effective pulse waveforms collected by the metering device are determined according to the first flow rate, and the period of each effective pulse waveform in the plurality of effective pulse waveforms is obtained; determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform; and determining the detection result of the metering device according to the respective duty ratios of the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection. The technical scheme that this application provided is through confirming two continuous at least stable pulse waveform in a plurality of effective pulse waveforms of gathering to the measuring instrument's that confirms according to two at least stable pulse waveform detection result, thereby the effectual degree of accuracy that has improved the measuring instrument and detect.
Description
Technical Field
The present disclosure relates to the field of testing devices, and in particular, to a method and an apparatus for testing a meter, and a storage medium.
Background
The metering device detects the periodic variation of signals through the metering sensor, and determines the volume of fluid flowing through the metering device according to the varying periodic waveform so as to achieve the purpose of metering. However, in the production and use process of the metering device, the problem of measurement result failure may be caused by failure of the measuring sensor and the magnetic steel device or incomplete welding and assembling, and therefore, in the production or use link of the measurement, the measurement function of the metering device needs to be detected.
In the prior art, when a metering function of a metering device is detected, a detection device acquires a pulse waveform generated when a fluid flows through the metering device and a time interval corresponding to each pulse waveform to obtain a time interval corresponding to a low level and a time interval corresponding to a high level in each pulse waveform period. And judging the ratio of the time corresponding to the high level or the time corresponding to the low level to the total time of the waveform, namely whether the duty ratio of the pulse period is in a preset interval, and if so, determining that the metering function of the metering device is normal.
However, in the process of detecting the metering device, there may be a process in which the flow rate of the fluid is increased from zero to a preset flow rate, or is decreased from the preset flow rate to zero, and a time corresponding to a high level or a time corresponding to a low level may be long, so that the duty ratio calculated by the detecting device is not within a preset interval, and the metering device is mistakenly judged as failing to be detected, thereby reducing the accuracy of detection of the metering device.
Disclosure of Invention
The embodiment of the application provides a measuring instrument detection method, a measuring instrument detection device and a storage medium, and the accuracy of measuring instrument detection can be effectively improved.
In a first aspect, an embodiment of the present application provides a method for detecting a metering device, where the method for detecting a metering device includes:
when controlling to lead fluid into a metering instrument at a first flow rate, determining a plurality of effective pulse waveforms collected by the metering instrument according to the first flow rate, and acquiring the period of each effective pulse waveform in the plurality of effective pulse waveforms.
And determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform.
And determining a detection result of the metering device according to the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection.
In one possible implementation, the determining, according to the period of each effective pulse waveform, at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms includes:
acquiring the standard flow stability of the metering instrument;
and aiming at two continuous effective pulse waveforms, determining whether the second effective pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform and the standard flow stability.
In a possible implementation manner, the determining whether the second pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform, and the standard flow stability includes:
determining a difference between a period of the second valid pulse waveform and a period of the first valid pulse waveform;
determining a ratio of said difference to a period of said second active pulse waveform;
and if the ratio is smaller than the standard flow stability, determining that the second effective pulse waveform is a stable pulse waveform.
In one possible implementation manner, the determining, according to a first flow rate, a plurality of effective pulse waveforms collected by a metering device when controlling to introduce fluid into the metering device at the first flow rate includes:
when controlling to introduce fluid into a metering instrument at a first flow rate, acquiring a plurality of pulse waveforms collected by the metering instrument;
acquiring a reference period of a reference pulse waveform of the metering instrument;
and screening the effective pulse waveform from the plurality of pulse waveforms according to the reference period.
In one possible implementation, the screening the effective pulse waveform from the plurality of pulse waveforms according to the reference period includes:
obtaining a period of each of the plurality of pulse waveforms;
determining the pulse waveform with the period smaller than the reference period as the effective pulse waveform.
In one possible implementation, the acquiring a reference period of a reference pulse waveform of the metering device includes:
respectively acquiring the reference flow of the metering instrument and the pulse equivalent of the reference pulse waveform;
and determining the ratio of the pulse equivalent to the reference flow as the reference period.
In a possible implementation manner, the determining a detection result of the metering device according to a duty cycle of at least one stable pulse waveform of the at least two stable pulse waveforms includes:
respectively judging whether the respective duty ratios of the at least two stable pulse waveforms are within a preset range;
if the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is within the preset range, determining that the metering instrument passes the detection;
and if the respective duty ratios of the at least two stable pulse waveforms are not in the preset range, determining that the detection of the metering device fails.
In a second aspect, an embodiment of the present application provides a detection apparatus for a metering device, where the detection apparatus for the metering device includes:
the screening module is used for determining a plurality of effective pulse waveforms collected by the metering instrument according to the first flow when controlling to introduce fluid into the metering instrument at the first flow, and acquiring the period of each effective pulse waveform in the effective pulse waveforms.
And the determining module is used for determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform.
The processing module is further configured to determine a detection result of the metering device according to a duty ratio of at least one stable pulse waveform of the at least two stable pulse waveforms, where the detection result includes a detection pass or a detection fail.
In a possible implementation manner, the determining module is specifically configured to obtain a standard flow stability of the metering device; and aiming at two continuous effective pulse waveforms, determining whether the second effective pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform and the standard flow stability.
In a possible implementation manner, the determining module is specifically configured to determine a difference between a period of the second effective pulse waveform and a period of the first effective pulse waveform; determining a ratio of the difference to a period of the second valid pulse waveform. And when the ratio is smaller than the standard flow stability, determining the second effective pulse waveform as a stable pulse waveform.
In a possible implementation manner, the screening module is specifically configured to obtain a plurality of pulse waveforms collected by a metering instrument when controlling to introduce a fluid into the metering instrument at a first flow rate; acquiring a reference period of a reference pulse waveform of the metering instrument; and screening the effective pulse waveform from the plurality of pulse waveforms according to the reference period.
In a possible implementation manner, the screening module is specifically configured to obtain a period of each pulse waveform in the plurality of pulse waveforms; determining the pulse waveform with the period smaller than the reference period as the effective pulse waveform.
In a possible implementation manner, the screening module is further configured to obtain a reference flow of the metering device and a pulse equivalent of the reference pulse waveform respectively; and determining the ratio of the pulse equivalent to the reference flow as the reference period.
In a possible implementation manner, the processing module is specifically configured to respectively determine whether respective duty ratios of the at least two stable pulse waveforms are within a preset range; when the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is in the preset range, determining that the metering instrument passes the detection; and when the respective duty ratios of the at least two stable pulse waveforms are not in the preset range, determining that the detection of the metering device fails.
In a third aspect, an embodiment of the present application further provides an electronic device, which may include a memory and a processor; wherein the content of the first and second substances,
the memory is used for storing the computer program.
The processor is configured to read the computer program stored in the memory, and execute the method for detecting a metering device according to any one of the possible implementation manners of the first aspect.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, where a computer executes instructions, and when a processor executes the computer to execute the instructions, the method for detecting a metering device described in any one of the possible implementation manners of the first aspect is implemented.
In a fifth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for detecting a metering device described in any one of the possible implementation manners of the first aspect is implemented.
Therefore, the embodiment of the application provides a detection method, a detection device and a storage medium of a metering device, when fluid is controlled to be introduced into the metering device at a first flow rate, a plurality of effective pulse waveforms collected by the metering device are determined according to the first flow rate, and the period of each effective pulse waveform in the plurality of effective pulse waveforms is obtained; determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform; and determining the detection result of the metering device according to the respective duty ratios of the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection. According to the technical scheme, the pulse waveforms with obvious and invalid waveforms can be removed by collecting the effective pulse waveforms. The method has the advantages that at least two continuous stable pulse waveforms are determined in the collected effective pulse waveforms, unstable pulse waveforms generated when the flow is changed violently can be removed, the detection results of the metering instrument determined by the at least two stable pulse waveforms are used, the influence of the unstable stable pulse waveforms on the detection results is avoided, and the detection accuracy of the metering instrument is effectively improved.
Drawings
Fig. 1 is a schematic view of an application scenario of a detection method of a metering device according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a detection method of a metering device according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a method for determining a standard flow stability according to an embodiment of the present disclosure;
fig. 4 is a schematic view illustrating a metering principle of a water meter according to an embodiment of the present application;
fig. 5 is a schematic view illustrating a metering principle of another water meter according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a detection device of a metering device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The technical scheme provided by the embodiment of the application can be applied to the detection scene of the metering device. Fig. 1 is a schematic view of an application scenario of a detection method of a metering device according to an embodiment of the present application. In fig. 1, when a fluid flows through a meter 101, a measurement sensor within the meter 101 can detect a periodic signal change, thereby measuring the volume of fluid flowing therethrough. For example, when water flows through the magneto-mechanical water meter, the water flow drives the impeller to rotate, the gear is pushed to rotate, the magnetic steel is driven to rotate on the circumference, periodic magnetic field signals are converted into electric signals, and the metering sensor can detect the periodic electric signals to achieve the purpose of metering. The meter 101 sends the detected periodic signal to the detection device 102 in the form of a periodic pulse waveform. The detection device 102 processes the acquired pulse waveforms, determines a time interval corresponding to each pulse waveform, and obtains a time interval corresponding to a low level and a time interval corresponding to a high level in each waveform. And judging the ratio of the time interval corresponding to the high level or the time interval corresponding to the low level to the time interval corresponding to the pulse waveform, namely determining whether the duty ratio of the pulse waveform is within a preset interval, and if so, determining that the metering function of the metering device is normal.
However, when the detection device 102 detects whether the metering function of the metering device 101 is normal, a sudden change in the flow rate may occur, including: when a fluid with a preset flow is introduced into the metering device 101, the flow passing through the metering device 101 is increased from zero flow to a preset flow; and when the flow of fluid into the meter 101 is stopped, a process of reducing the flow rate of fluid flowing through the meter 101 from a preset flow rate to a zero flow rate may occur. The pulse shape resulting from this process may also be collected. The pulse waveform generated when the flow rate is changed suddenly is collected inevitably. However, the high level or the low level of the pulse waveform generated during the rapid flow rate change may correspond to a long time, which may cause the duty ratio of the pulse waveform not to be within the preset interval. Therefore, the meter 101 whose metering function is normal may be erroneously determined as a failed detection, thereby reducing the accuracy of detection by the meter 101.
Considering the problem that the detection result of the metering instrument is inaccurate due to the pulse waveform generated when the flow passing through the metering instrument is changed suddenly, the metering instrument can screen a plurality of pulse waveforms after collecting the plurality of pulse waveforms, determine the stable pulse waveform, and determine the detection result of the metering instrument according to the duty ratio of the stable pulse waveform. The pulse waveforms generated when the flow rate changes sharply can be removed by screening the plurality of pulse waveforms, so that the detection result of the metering instrument is improved.
For example, in this embodiment of the present application, the metering device may be a water meter, a gas meter, or another device for metering a flow rate, which is not limited in this embodiment of the present application.
Hereinafter, the detection method of the meter provided in the present application will be described in detail by specific examples. It is to be understood that the following detailed description may be combined with other embodiments, and that the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a schematic flowchart of a detection method of a metering device according to an embodiment of the present disclosure. The method of testing the meter may be performed by software and/or hardware means, for example, the hardware means may be a testing device of the meter, and the testing device of the meter may be an electronic device or a processing chip in the electronic device. For example, referring to fig. 2, the method for detecting the metering device may include:
s201, when controlling to lead fluid into the metering instrument at a first flow rate, determining a plurality of effective pulse waveforms collected by the metering instrument according to the first flow rate, and acquiring the period of each effective pulse waveform in the plurality of effective pulse waveforms.
Illustratively, the first flow rate is within a flow rate range allowed to be accessed by the meter. For example, the maximum and minimum flow rates permitted to be accessed by the meter may be determined by querying the relevant regulations. The period of the pulse waveform is a time interval corresponding to the pulse waveform.
In the embodiment of the application, the effective pulse waveform is obtained by screening an initial pulse waveform generated by the magnetic resistance in the metering instrument, and the screening standard is that the metering instrument to be detected is introduced with fluid with a certain reference flow rate, and the collected pulse waveform corresponds to a reference period.
When a plurality of effective pulse waveforms are collected, a plurality of pulse waveforms collected by the metering instrument can be obtained when the fluid is controlled to be introduced into the metering instrument at the first flow rate; acquiring a reference period of a reference pulse waveform of a metering device; a valid pulse waveform is selected from the plurality of pulse waveforms according to a reference period.
For example, when a valid pulse waveform is screened from a plurality of pulse waveforms according to a reference period, a period of each of the plurality of pulse waveforms may be acquired; and determining the pulse waveform with the period smaller than the reference period as the effective pulse waveform.
For example, the meter collects 5 pulse waveforms with a period of 0.5 second, 0.54 second, 0.52 second, 0.58 second, 0.62 second, and the reference period of the reference waveform is 0.6 second. Therefore, the effective pulse waveform can be determined to be 4 pulse waveforms having respective periods of 0.5 second, 0.54 second, 0.52 second, and 0.58 second.
In the embodiment of the application, effective pulse waveforms are screened out from the collected multiple pulse waveforms according to the reference period, so that the pulse waveforms which are generated in the flow sharp increasing or sharp decreasing process and are larger than or smaller than the reference period can be prevented from being determined as the effective pulse waveforms by mistake, and the detection accuracy of the metering instrument is effectively improved.
For example, when a reference period of a reference pulse waveform of the metering device is obtained, a reference flow of the metering device and a pulse equivalent of the reference pulse waveform may be obtained respectively; and determining the ratio of the pulse equivalent to the reference flow as a reference period. It can be understood that, in order to increase the accuracy of the effective pulse waveform for screening, the reference flow rate of the metering device needs to be greater than the minimum flow rate allowed to be introduced by the metering device, but is much smaller than the maximum flow rate allowed to be introduced by the metering device, which can be specifically set according to the actual situation, and this is not limited in this embodiment of the present application.
For example, the pulse equivalent refers to the displacement of the positioning control movement generated when the controller outputs a positioning control pulse. In the embodiment of the present application, the pulse equivalent may be determined according to a metering sensor in the metering device, which is not particularly limited in the embodiment of the present application.
In the embodiment of the application, the determined effective pulse waveform is more accurate by determining the reference period of the reference pulse waveform.
After determining a plurality of valid pulse waveforms collected by the metering device and the period of each valid pulse waveform, the following S202 may be performed:
s202, determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform.
In the embodiment of the present application, the stable pulse waveform refers to a pulse waveform obtained by screening the effective pulse waveform again. Wherein, the stable pulse waveform does not include the pulse waveform generated when the flow introduced into the metering instrument changes suddenly.
For example, when at least two continuous stable pulse waveforms are determined from a plurality of effective pulse waveforms according to the period of each effective pulse waveform, the standard flow stability of the metering instrument can be obtained; and aiming at two continuous effective pulse waveforms, determining whether the second effective pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform and the standard flow stability. The standard flow stability may be directly obtained by the detection device, for example, the standard flow stability may be directly determined according to the flow stability marked on the detection device, or may be obtained by further measurement, which is not limited in this embodiment of the present application.
For example, when determining whether the second pulse waveform is a stable pulse waveform, the second pulse waveform may be used as the first effective pulse waveform for determining the next stable pulse waveform.
In the embodiment of the application, according to the standard flow stability, whether the second effective pulse waveform is the stable pulse waveform is determined in two continuous effective pulse waveforms, and the pulse waveform with poor stability is removed, so that the accuracy of the detection result of the metering instrument is further improved.
In determining whether the second pulse waveform is a stable pulse waveform, the second pulse waveform may be determined by determining a difference between a period of the second valid pulse waveform and a period of the first valid pulse waveform; determining a ratio of the difference to a period of the second valid pulse waveform; and if the ratio is smaller than the standard flow stability, determining the second effective pulse waveform as a stable pulse waveform. For example, if the first effective pulse waveform has a period of 0.5 seconds and the second effective pulse waveform has a period of 0.52 seconds, the ratio can be determined to be about 3.8%, and if the standard stability is 4%, the second effective pulse waveform can be determined to be the stable pulse waveform.
Further, in order to obtain a more stable stabilization pulse waveform, a stabilization pulse waveform may be determined among a plurality of effective pulse waveforms which are continuous. When the above condition is satisfied, the last effective pulse waveform of the plurality of effective pulses may be determined as the steady pulse waveform, or any one of the effective pulse waveforms may be determined as the steady pulse waveform. For example, an effective pulse waveform is determined in 5 continuous effective pulses, the difference between the periods of any two continuous effective pulse waveforms in the 5 continuous effective pulse waveforms and the ratio of the difference to the period of the next effective pulse waveform are calculated, and if the ratio is less than the standard flow stability, the 5 th effective pulse waveform is determined as the stable pulse waveform. And the 5 th valid pulse waveform may be taken as the first valid pulse waveform of the next 5 consecutive valid pulse waveforms.
In another possible implementation, if the ratio is greater than or equal to the standard flow stability, the first valid pulse waveform is discarded, the second valid pulse waveform is used as the first valid pulse waveform of the next two consecutive valid pulse waveforms, and the stable pulse waveform is determined continuously.
In the embodiment of the application, one stable pulse waveform is determined in two continuous effective pulse waveforms, so that the pulse waveform with large flow change and poor stability can be removed, and the detection accuracy of the metering instrument is further improved.
S203, determining the detection result of the metering device according to the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection.
For example, the duty ratio is a ratio of a time interval corresponding to a high level or a time interval corresponding to a low level of the pulse waveform to a period of the pulse waveform.
When the detection result of the metering instrument is determined according to the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms, whether the respective duty ratios of the at least two stable pulse waveforms are in a preset range or not can be respectively judged; if the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is in a preset range, determining that the metering instrument passes the detection; and if the respective duty ratios of the at least two stable pulse waveforms are not in the preset range, determining that the detection of the metering instrument fails.
For example, by the ratio of the time interval corresponding to the high level to the pulse waveform period, the duty ratios of 5 stable pulse waveforms are determined to be 50%, 62%, 60%, 58% and 45%, respectively, wherein the preset range is 35% to 65%, and then the duty ratios of the 5 stable pulse waveforms can be determined to be all within the preset range, and then the detection of the metering instrument can be determined to pass.
For example, in the embodiment of the present application, in order to further increase the accuracy of the meter detection, it may be further determined that the meter detection is passed when the respective duty ratios of the at least two stable pulse waveforms are within the preset range. The embodiments of the present application are described by way of example only, and do not represent that the embodiments of the present application are limited thereto.
In the embodiment of the application, when the duty ratio of at least one stable pulse waveform in at least two stable pulse waveforms is within the preset range, the metering instrument is determined to pass the detection, so that the problem of misjudgment caused by the fact that the detection result is determined only through the duty ratio of one stable pulse waveform can be avoided, and the detection accuracy of the metering instrument is further improved.
Therefore, according to the detection method of the metering device provided by the embodiment of the application, when the fluid is controlled to be introduced into the metering device at the first flow rate, the plurality of effective pulse waveforms collected by the metering device are determined according to the first flow rate, and the period of each effective pulse waveform in the plurality of effective pulse waveforms is obtained; determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform; and determining the detection result of the metering device according to the respective duty ratios of the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection. By collecting a plurality of valid pulse waveforms, apparently invalid pulse waveforms, such as incomplete pulse waveforms, can be removed. By determining at least two continuous stable pulse waveforms in the plurality of effective pulse waveforms, unstable pulse waveforms generated by violent change of flow can be removed, and the influence of the unstable stable pulse waveforms on the detection result is avoided according to the detection result of the metering instrument determined by the at least two stable pulse waveforms, so that the detection accuracy of the metering instrument is effectively improved.
For example, because different detection devices are used, the standard flow stability may be different, and therefore, when the detection device is used to detect the metering device, the standard flow stability corresponding to the detection device may be determined first, so as to improve the accuracy of the determined stable pulse waveform. Hereinafter, the embodiment of the present application will describe in detail how to determine the standard flow stability of the detection device. Specifically, referring to fig. 3, fig. 3 is a schematic flow chart of a method for determining a standard flow stability according to an embodiment of the present disclosure. The method for determining the standard flow stability comprises the following steps:
s301, when controlling to feed fluid into the metering instrument with the normal metering function at the first flow rate, determining a plurality of continuous pulse waveforms collected by the metering instrument with the normal metering function, and acquiring the period of each pulse waveform in the plurality of pulse waveforms.
For example, a plurality of successive pulse waveforms may be collected by a metering sensor of a meter and a period of each pulse waveform may be acquired. The number of pulse waveforms is not limited in this embodiment.
S302, determining the stability of two continuous pulse waveforms according to the period of each pulse waveform in the plurality of pulse waveforms.
For example, when determining the stability of two consecutive pulse waveforms, the difference between the period of the first pulse waveform and the period of the second pulse waveform in the two consecutive pulse waveforms may be determined according to the method described in the above embodiment. And determining the ratio of the difference value to the period of the second pulse waveform as the stability of the second pulse waveform. And taking the second pulse waveform as the first pulse waveform of the next two continuous pulse waveforms, thereby calculating the stability of the next pulse waveform and obtaining a plurality of stabilities.
And S303, determining the standard flow stability according to the plurality of stabilities and the stability error values.
For example, when determining the standard flow stability from the plurality of stabilities and the stability error value, a maximum value of the plurality of stabilities may be determined, and a sum of the maximum value and the stability error value may be determined as the standard stability.
In another possible implementation manner, a stability average value of a plurality of stabilities may also be determined, and the sum of the stability average value and the stability error value is determined as the standard stability. The specific method in the embodiment of the present application is not limited at all, and can be selected according to actual situations.
In the embodiment of the application, the continuous pulse waveforms collected by the metering instrument with normal metering function are determined by introducing the fluid with the first flow rate into the metering instrument with normal metering function. And the stability of every two continuous pulse waveforms is calculated, and the standard flow stability is determined according to a plurality of stabilities, so that the determined standard flow stability is more accurate, the flow of the introduced fluid is the same as that of the introduced fluid during the detection of the metering instrument, and the detection accuracy of the metering instrument can be further improved.
In order to facilitate understanding of the detection method of the metering device provided in the embodiment of the present application, the technical solution provided in the embodiment of the present application will be described in detail below by taking the metering device as a magnetic mechanical water meter as an example.
For example, the water meter with the magnetic machine can realize the function of measuring the water amount through the action between the magnetic steel and the magnetic group, specifically, refer to fig. 4, where fig. 4 is a schematic view of a measuring principle of the water meter provided by the embodiment of the present application.
According to fig. 4, the magnetic steel makes a circular motion around the center of the magnetic steel on the circumference of the magnetic steel, and a magnetic resistance electric signal, i.e., a pulse waveform, is generated through the magnetic group a and the magnetic group B. In fig. 4, the magnetic resistances a and B are symmetrically distributed with the magnetic steel center as the symmetric center, so that the time interval corresponding to the low level and the time interval corresponding to the high level in the pulse waveforms generated by the magnetic resistances a and B are equal.
For example, fig. 5 is a schematic view illustrating a metering principle of another water meter according to an embodiment of the present application. In fig. 5, the magnetic resistances a and B are not symmetrically distributed with the magnetic steel center as the symmetric center, and therefore, the time interval corresponding to the low level and the time interval corresponding to the high level in the pulse waveforms generated by the magnetic resistances a and B are not equal.
It should be understood that, in the embodiment of the present application, the number of the magnetic resistances in the water meter may be 2 or 3, and may be specifically set according to the actual situation, and the schematic diagrams of the metering principle of the water meter shown in fig. 4 and 5 in the embodiment of the present application only illustrate that the number of the magnetic resistances is 2, but the embodiment of the present application is not limited thereto.
The pulse waveform collected in the embodiment of the present application may be a pulse waveform generated by any one of the magnetic resistances in the water meter, and may also be a pulse waveform generated by 2 or 3 magnetic resistances respectively.
Further, a standard reference waveform of the detection device is calculated. At the first flow rate Q of 2.5m3And/h, introducing water into a water meter with a normal metering function, collecting 50 pulse waveforms generated by magnetic resistance and a period corresponding to each pulse waveform, calculating the stability of the 50 pulse waveforms according to the method in the embodiment, and determining that the maximum value of the stability is 2% and the stability error is 1%, so that the standard flow stability can be determined to be 3%.
In the embodiment of the present application, a reference flow Q of the water meter is assumedr＝0.818m3If the pulse equivalent of the reference pulse waveform is E equal to 10L, the reference period T can be calculatedr＝E/Qr＝10L/0.818m3H 44 seconds. At a first flow rate Q of 2.50.818m3And h, introducing water into the water meter, collecting a plurality of pulse waveforms of the water meter, and determining a pulse waveform with a period smaller than a reference period in the plurality of pulse waveforms as a plurality of effective pulse waveforms.
For example, a plurality of valid pulse waveforms may be further filtered, and at least two stable pulse waveforms are determined among the plurality of valid pulse waveforms. Specifically, the stability of the effective pulse waveform is determined in real time when the effective pulse waveform is acquired. The ratio of the absolute value of the difference between the period T1 of the first valid pulse waveform and the period T2 of the second valid pulse waveform to the period T2 of the second valid pulse waveform is determined as the stability of the second valid pulse waveform, i.e., | T2-T1 |/T2. And if the | T2-T1|/T2 is smaller than the standard flow stability, determining that the second effective pulse waveform is stable, and calculating the stability | T3-T2|/T3 of the third effective pulse waveform and the stability | T4-T3|/T4 of the fourth effective pulse waveform by the same method. And if each stability is less than 3% of the standard flow stability, determining the fourth effective pulse waveform as a stable pulse waveform. Or any one of the four effective pulse waveforms is taken as a stable pulse waveform, and the specific embodiment of the present application is not limited at all.
It can be understood that, if the stability of the third effective pulse waveform is greater than or equal to the standard flow stability in the process of determining the stability, the first two effective pulse waveforms are discarded, the third effective pulse waveform is used as the first effective pulse waveform, and the stable pulse waveform continues to be determined, so as to ensure the accuracy of the determined stable pulse waveform.
Illustratively, according to the method described above, the next stabilization pulse waveform is determined using the fourth valid pulse waveform as the first of the next 4 consecutive valid pulse waveforms.
And after at least two stable pulse waveforms are determined, determining whether the water meter passes the detection or not according to the ratio of the time interval corresponding to the high level or the time interval corresponding to the low level in the stable pulse waveforms to the period of the stable pulse. If the ratio corresponding to at least one stable pulse waveform in the at least two stable pulse waveforms is within the preset range of 35% to 65%, the water meter can be determined to pass the detection, otherwise, the water meter is determined to fail the detection.
In summary, the detection method of the metering device provided by the embodiment of the application can detect the water meter, determine the effective pulse waveform by primarily screening the pulse waveform generated by the water meter, and determine at least two stable pulse waveforms in a plurality of effective pulse waveforms by screening again; and determining whether the water meter passes the detection or not according to the at least two stable pulse waveforms, and determining that the water meter passes the detection only when the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is within a preset range. The method can avoid the removal of unstable pulse waveforms generated when the water amount changes violently, and avoid the influence of the unstable pulse waveforms on the detection result, thereby effectively improving the detection accuracy of the metering instrument.
Fig. 6 is a schematic structural diagram of a detection device 60 of a metering device according to an embodiment of the present application, and for example, referring to fig. 6, the detection device 60 of the metering device may include:
the screening module 601 is configured to determine, according to a first flow rate, a plurality of effective pulse waveforms collected by the metering instrument when controlling to introduce a fluid into the metering instrument at the first flow rate, and obtain a period of each effective pulse waveform in the plurality of effective pulse waveforms.
The determining module 602 is further configured to determine at least two consecutive stable pulse waveforms from the plurality of valid pulse waveforms according to a period of each valid pulse waveform.
The processing module 603 is further configured to determine a detection result of the metering device according to a duty ratio of at least one stable pulse waveform of the at least two stable pulse waveforms, where the detection result includes a detection pass or a detection fail.
Optionally, the determining module 602 is specifically configured to obtain a standard flow stability of the metering device; and aiming at two continuous effective pulse waveforms, determining whether the second effective pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform and the standard flow stability.
Optionally, the determining module 602 is specifically configured to determine a difference between a period of the second effective pulse waveform and a period of the first effective pulse waveform; the ratio of the difference to the period of the second valid pulse waveform is determined. And when the ratio is smaller than the standard flow stability, determining the second effective pulse waveform as a stable pulse waveform.
Optionally, the screening module 601 is specifically configured to obtain a plurality of pulse waveforms collected by the metering instrument when controlling to introduce fluid into the metering instrument at the first flow rate; acquiring a reference period of a reference pulse waveform of the metering instrument; a valid pulse waveform is selected from the plurality of pulse waveforms according to a reference period.
Optionally, the screening module 601 is specifically configured to obtain a period of each pulse waveform in a plurality of pulse waveforms; and determining the pulse waveform with the period smaller than the reference period as the effective pulse waveform.
Optionally, the screening module 601 is further configured to obtain a reference flow of the metering device and a pulse equivalent of the reference pulse waveform; and determining the ratio of the pulse equivalent to the reference flow as a reference period.
Optionally, the processing module 603 is specifically configured to respectively determine whether respective duty ratios of the at least two stable pulse waveforms are within a preset range; when the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is in a preset range, determining that the metering instrument passes the detection; and when the respective duty ratios of the at least two stable pulse waveforms are not in the preset range, determining that the detection of the metering device fails.
The detection device for the metering device provided by the embodiment of the application can execute the technical scheme of the detection method for the metering device in any embodiment, the implementation principle and the beneficial effect of the detection device are similar to those of the detection method for the metering device, and the implementation principle and the beneficial effect of the detection method for the metering device can be referred to, and are not repeated here.
Fig. 7 is a schematic structural diagram of an electronic device 70 provided in an embodiment of the present application, and for example, please refer to fig. 7, the electronic device 70 may include a processor 701 and a memory 702; wherein the content of the first and second substances,
the memory 702 is used for storing computer programs.
The processor 701 is configured to read the computer program stored in the memory 702, and execute the technical solution of the detection method of the metering device in any of the embodiments according to the computer program in the memory 702.
Alternatively, the memory 702 may be separate or integrated with the processor 701. When the memory 702 is a device independent from the processor 701, the detection apparatus 70 of the metering device may further include: a bus for connecting the memory 702 and the processor 701.
Optionally, this embodiment further includes: a communication interface, which may be connected to the processor 701 via a bus. The processor 701 may control the communication interface to implement the receiving and transmitting functions of the electronic device 70 described above.
The electronic device 70 shown in the embodiment of the present application can execute the technical solution of the detection method of the metering device in any embodiment, and the implementation principle and the beneficial effect thereof are similar to those of the detection method of the metering device, and reference may be made to the implementation principle and the beneficial effect of the detection method of the metering device, which are not described herein again.
An embodiment of the present application further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the technical solution for implementing the method for detecting a metering device in any of the embodiments is implemented.
The embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the technical solution for implementing the detection method of the metering device in any of the embodiments is implemented, and the implementation principle and the beneficial effects of the computer program are similar to those of the detection method of the metering device, which can be referred to as the implementation principle and the beneficial effects of the detection method of the metering device, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. 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, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The computer-readable storage medium may be implemented by any type or combination of volatile or non-volatile 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 disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (11)
1. A method of testing a meter, comprising:
when controlling to introduce fluid into a metering instrument at a first flow rate, determining a plurality of effective pulse waveforms collected by the metering instrument according to the first flow rate, and acquiring the period of each effective pulse waveform in the plurality of effective pulse waveforms;
determining at least two stable pulse waveforms in succession from the plurality of valid pulse waveforms according to the period of each valid pulse waveform;
and determining a detection result of the metering device according to the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms, wherein the detection result comprises passing detection or failing detection.
2. The method of claim 1, wherein said determining successive at least two stable pulse waveforms from said plurality of valid pulse waveforms based on said period of each valid pulse waveform comprises:
acquiring the standard flow stability of the metering instrument;
and aiming at two continuous effective pulse waveforms, determining whether the second effective pulse waveform is a stable pulse waveform according to the period of the second effective pulse waveform, the period of the first effective pulse waveform and the standard flow stability.
3. The method of claim 2, wherein determining whether the second pulse waveform is a stable pulse waveform based on the period of the second valid pulse waveform, the period of the first valid pulse waveform, and the standard flow stability comprises:
determining a difference between a period of the second valid pulse waveform and a period of the first valid pulse waveform;
determining a ratio of said difference to a period of said second active pulse waveform;
and if the ratio is smaller than the standard flow stability, determining that the second effective pulse waveform is a stable pulse waveform.
4. The method of any one of claims 1-3, wherein determining a plurality of valid pulse waveforms collected by a meter based on a first flow rate while controlling the flow of fluid to the meter at the first flow rate comprises:
when controlling to introduce fluid into a metering instrument at a first flow rate, acquiring a plurality of pulse waveforms collected by the metering instrument;
acquiring a reference period of a reference pulse waveform of the metering instrument;
and screening the effective pulse waveform from the plurality of pulse waveforms according to the reference period.
5. The method of claim 4, wherein the screening the valid pulse waveform from the plurality of pulse waveforms according to the reference period comprises:
obtaining a period of each of the plurality of pulse waveforms;
determining the pulse waveform with the period smaller than the reference period as the effective pulse waveform.
6. The method of claim 4, wherein said obtaining a reference period of a reference pulse waveform of the meter comprises:
respectively acquiring the reference flow of the metering instrument and the pulse equivalent of the reference pulse waveform;
and determining the ratio of the pulse equivalent to the reference flow as the reference period.
7. The method according to any one of claims 1-3, wherein determining the measurement result of the meter based on the duty cycle of at least one of the at least two stable pulse waveforms comprises:
respectively judging whether the respective duty ratios of the at least two stable pulse waveforms are within a preset range;
if the duty ratio of at least one stable pulse waveform in the at least two stable pulse waveforms is within the preset range, determining that the metering instrument passes the detection;
and if the respective duty ratios of the at least two stable pulse waveforms are not in the preset range, determining that the detection of the metering device fails.
8. A meter testing device, comprising:
the system comprises a determining module, a calculating module and a judging module, wherein the determining module is used for determining a plurality of effective pulse waveforms collected by a metering instrument according to a first flow when controlling to introduce fluid into the metering instrument at the first flow, and acquiring the period of each effective pulse waveform in the effective pulse waveforms;
the screening module is further used for determining at least two continuous stable pulse waveforms from the plurality of effective pulse waveforms according to the period of each effective pulse waveform;
the processing module is further configured to determine a detection result of the metering device according to a duty ratio of at least one stable pulse waveform of the at least two stable pulse waveforms, where the detection result includes a detection pass or a detection fail.
9. An electronic device comprising a memory and a processor; wherein the content of the first and second substances,
the memory for storing a computer program;
the processor is configured to read the computer program stored in the memory and execute a method of detecting a meter according to any of claims 1-7 according to the computer program in the memory.
10. A computer readable storage medium having computer executable instructions stored thereon which, when executed by a processor, perform a method of meter testing as claimed in any one of claims 1 to 7.
11. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, carries out a method of meter testing as claimed in any one of the preceding claims 1-7.
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