CN115183832A - Flow signal interference diagnosis and processing method, device and equipment for vortex flowmeter - Google Patents
Flow signal interference diagnosis and processing method, device and equipment for vortex flowmeter Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
- G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3287—Means for detecting quantities used as proxy variables for swirl circuits therefor
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Abstract
The invention provides a method, a device and equipment for diagnosing and processing flow signal interference for a vortex flowmeter, wherein the method comprises the following steps: simultaneously acquiring output signals of two piezoelectric sensors positioned in the vortex flowmeter to respectively obtain a first original signal S1 and a second original signal S2; amplifying the S1 and the S2 to respectively obtain a first amplified signal S3 and a second amplified signal S4; carrying out differential amplification and shaping filtering on the S3 and the S4 to obtain a main flow frequency F1; selecting S1 or S2 for amplification and shaping filtering to obtain auxiliary flow frequency F2; calculating an absolute value delta of the absolute deviation and an absolute value delta of the relative deviation of the F1 and the F2; judging the interference degree of the F1 according to the F1, the F2, the delta and the delta, and determining the calculation reference of the flow Q according to the interference degree of the F1; and generating interference alarm information according to the interference degree. The invention enables a user to know the running state of the flowmeter in time and take relevant measures, thereby effectively improving the accuracy and the reliability of the metering and further developing the application scene of the product.
Description
Technical Field
The invention relates to the technical field of flowmeter flow signal processing, in particular to a method and a device for diagnosing and processing flow signal interference for a vortex flowmeter, electronic equipment and a storage medium.
Background
The vortex flowmeter mainly comprises a precession vortex flowmeter and a vortex shedding flowmeter, and is mainly used for metering media such as natural gas, steam, liquid and the like in an oil-gas field. Both of these products mostly use piezoelectric transducers and their signal amplification processing modules to detect the frequency of fluid vibration, which is proportional to the flow rate under the measurement conditions through the flow meter. Because the piezoelectric sensor is easily influenced by pipeline vibration and medium pressure pulsation in the pipeline, the product has the defect of poor mechanical vibration resistance and pressure fluctuation resistance. In order to overcome the defects, most products adopt two piezoelectric sensors or one differential sensor (two piezoelectric sensitive elements are arranged in the differential sensor) arranged on a meter body, and inhibit common-mode interference signals caused by pipeline vibration and medium pressure pulsation by differentially amplifying output signals of the two sensors, thereby improving the anti-interference performance of the flow meter. However, with this technique alone, when there is strong mechanical vibration or medium pressure fluctuation in the pipeline, the flow meter cannot identify whether the received pulse signal is a normal flow signal or a severely interfered interference signal, which results in a miscounting, and thus a large metering error is caused. Some products adopt a method of comparing phases of two pulse signals obtained after amplifying signals output by two sensors respectively to judge the interference degree of flow signals, although the interference recognition effect is good, metering is not carried out only when strong interference is caused, and metering is normally carried out in other states, and relevant alarm information is not provided, so that users can possibly misjudge the state of the flowmeter to influence normal use.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a method, an apparatus, and an electronic device for diagnosing and processing interference of a flow signal for a vortex flowmeter, which solve the technical problems that when strong interference exists in the conventional vortex flowmeter, the flow signal abnormality cannot be identified, so that a mis-metering occurs, and related alarm information is not provided.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a method for diagnosing and processing interference of a flow signal for a vortex flowmeter, the method comprising:
simultaneously acquiring output signals of two piezoelectric sensors positioned in the vortex flowmeter to respectively obtain a first original signal S1 and a second original signal S2;
amplifying the first original signal S1 to obtain a first amplified signal S3;
amplifying the second original signal S2 to obtain a second amplified signal S4;
differentially amplifying the first amplified signal S3 and the second amplified signal S4, and shaping and filtering to obtain a main flow frequency F1;
selecting a first original signal S1 or a second original signal S2, amplifying, shaping and filtering to obtain an auxiliary flow frequency F2;
calculating according to the main flow frequency F1 and the auxiliary flow frequency F2 to obtain an absolute value delta of absolute deviation and an absolute value delta of relative deviation of the main flow frequency F1 and the auxiliary flow frequency F2;
judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1;
and generating interference alarm information according to the interference degree.
In an embodiment, after obtaining the first amplified signal S3 and the second amplified signal S4, the update time of the main flow rate frequency F1 and the auxiliary flow rate frequency F2 is configured, and the number of pulses counted in each update time interval is at least 50.
In an embodiment, the determining the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation includes:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the first percentage threshold B,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value delta of the absolute deviation is less than or equal to the third frequency threshold D, judging that the interference degree of the main flow frequency F1 is not interference, and calculating the flow Q based on the main flow frequency F1.
In an embodiment, the determining the interference level of the main flow rate frequency F1 according to the main flow rate frequency F1, the auxiliary flow rate frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation further includes:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the second percentage threshold E,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value Delta of the absolute deviation is less than or equal to the fourth frequency threshold F, the interference degree of the main flow frequency F1 is judged to be weak interference, and the flow Q is calculated based on the main flow frequency F1.
In an embodiment, the determining the interference level of the main flow rate frequency F1 according to the main flow rate frequency F1, the auxiliary flow rate frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation further includes:
when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is greater than the main flow frequency F1, the auxiliary flow frequency F2 is greater than or equal to the first frequency threshold a, and the absolute value delta of the relative deviation is greater than or equal to the third percentage threshold G,
or the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, and when the auxiliary flow frequency F2 is larger than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the auxiliary flow frequency F2 and smaller than the first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be strong interference, and the flow Q is zero.
In an embodiment, the determining the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation further includes:
when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the auxiliary flow frequency F2 being greater than or equal to the first frequency threshold a, the second percentage threshold E < the absolute value delta of the relative deviation < the third percentage threshold G,
or when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, and the auxiliary flow frequency F2 is greater than the main flow frequency F1, the second frequency threshold C is less than or equal to the auxiliary flow frequency F2< the first frequency threshold A, the absolute value delta of the absolute deviation is less than half the value of the auxiliary flow frequency F2,
or when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2< the main flow frequency F1, the main flow frequency > the first frequency threshold a,
or when the absolute value delta of the relative deviation is larger than the second percentage threshold E, the absolute value delta of the absolute deviation is larger than the fourth frequency threshold F, the auxiliary flow frequency F2 is smaller than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the main flow frequency F1 and smaller than the first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the numerical value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be general interference, and the flow Q is calculated based on the main flow frequency F1 and is recorded independently.
In an embodiment, the determining the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation further includes:
when the primary flow frequency F1< the second frequency threshold C, or the secondary flow frequency F2< the second frequency threshold C, the flow Q meter is zero.
In an embodiment, the generating interference alarm information according to the interference degree includes:
generating a weak interference mark according to the weak interference;
generating a general interference flag according to the general interference;
and generating a strong interference mark according to the strong interference.
In a second aspect, the present invention provides a flow signal disturbance diagnosis and processing device for a vortex flowmeter, the device comprising:
the first piezoelectric sensor is arranged on the acquisition vortex flowmeter and outputs a first original signal S1;
the second piezoelectric sensor is arranged on the acquisition vortex flowmeter and outputs a second original signal S2;
the first amplifier is used for amplifying the first original signal S1 to obtain a first amplified signal S3;
the second amplifier is used for amplifying the second original signal S2 to obtain a second amplified signal S4;
a differential amplifier for differentially amplifying the first amplified signal S3 and the second amplified signal S4;
a first shaping filter; the output signal shaping filter is used for shaping and filtering the output signal of the differential amplifier to obtain the main flow frequency F1;
the third amplifier is used for selecting the first original signal S1 or the second original signal S2 to amplify;
a first shaping filter; the auxiliary flow rate frequency F2 is obtained by shaping and filtering the output signal of the third amplifier;
the microprocessor is used for calculating and obtaining an absolute value delta of absolute deviation and an absolute value delta of relative deviation of the main flow frequency F1 and the auxiliary flow frequency F2; judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1; and generating interference alarm information according to the interference degree.
In one embodiment, the microprocessor is further configured to:
after the first amplified signal S3 and the second amplified signal S4 are obtained, the update time of the main flow rate frequency F1 and the auxiliary flow rate frequency F2 is configured, and the number of pulses counted in each update time interval is at least 50.
In one embodiment, the microprocessor is further configured to:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the first percentage threshold B,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value delta of the absolute deviation is less than or equal to the third frequency threshold D, judging that the interference degree of the main flow frequency F1 is not interference, and calculating the flow Q based on the main flow frequency F1.
In one embodiment, the microprocessor is further configured to:
when the main flow frequency F1 is more than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is less than or equal to the second percentage threshold E,
or when the second frequency threshold value C is less than or equal to the main flow frequency F1 and less than the first frequency threshold value A, and the absolute value delta of the absolute deviation is less than or equal to the fourth frequency threshold value F, the interference degree of the main flow frequency F1 is judged to be weak interference, and the flow Q is calculated based on the main flow frequency F1.
In one embodiment, the microprocessor is further configured to:
when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is greater than the main flow frequency F1, the auxiliary flow frequency F2 is greater than or equal to the first frequency threshold a, and the absolute value delta of the relative deviation is greater than or equal to the third percentage threshold G,
or when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is greater than the main flow frequency F1, the second frequency threshold C is less than or equal to the auxiliary flow frequency F2 and less than the first frequency threshold A, and the absolute value delta of the absolute deviation is greater than or equal to half of the numerical value of the auxiliary flow frequency F2, the interfered degree of the main flow frequency F1 is judged to be strong interference, and the flow Q is zero.
In one embodiment, the microprocessor is further configured to:
when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the auxiliary flow frequency F2 being greater than or equal to the first frequency threshold a, the second percentage threshold E < the absolute value delta of the relative deviation < the third percentage threshold G,
or when the absolute value delta of the relative deviation > a second percentage threshold E, the absolute value delta of the absolute deviation > a fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the second frequency threshold C is less than or equal to the auxiliary flow frequency F2< the first frequency threshold A, the absolute value delta of the absolute deviation < half the value of the auxiliary flow frequency F2,
or when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2< the main flow frequency F1, the main flow frequency > the first frequency threshold a,
or when the absolute value delta of the relative deviation is larger than the second percentage threshold E, the absolute value delta of the absolute deviation is larger than the fourth frequency threshold F, the auxiliary flow frequency F2 is smaller than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the main flow frequency F1 and smaller than the first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the numerical value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be general interference, and the flow Q is calculated based on the main flow frequency F1 and is recorded independently.
In one embodiment, the microprocessor is further configured to: when the primary flow frequency F1< the second frequency threshold C, or the secondary flow frequency F2< the second frequency threshold C, the flow Q meter is zero.
In one embodiment, the microprocessor is further configured to:
generating a weak interference mark according to the weak interference;
generating a general interference flag according to the general interference;
and generating a strong interference mark according to the strong interference.
In a third aspect, the present invention provides an electronic device comprising:
a processor, a memory, an interface to communicate with a gateway;
the memory is used for storing programs and data, and the processor calls the programs stored in the memory to execute the method for diagnosing and processing the disturbance of the flow signal for the vortex flowmeter provided by any one of the first aspect.
In a fourth aspect, the present invention provides a computer-readable storage medium including a program, which when executed by a processor is configured to perform a method for diagnosing and processing disturbance of a flow signal for a vortex flowmeter according to any one of the first aspect.
As can be seen from the foregoing description, embodiments of the present invention provide a method, an apparatus, an electronic device, and a storage medium for diagnosing and processing interference of a flow signal for a vortex flowmeter, where the present invention adopts a primary and secondary flow signal frequency design, where a primary flow signal frequency is output by differential amplification of two piezoelectric sensors, and a secondary flow signal is output by direct amplification of one of the piezoelectric sensors. According to different flow signal frequency segments, the absolute value delta of the relative deviation between the main flow frequency F1 and the auxiliary flow frequency F2 and the absolute value delta of the absolute deviation are adopted to judge the interference condition of the vortex flowmeter caused by mechanical vibration and pressure fluctuation in use, and relevant interference alarm information, a judgment flow and a processing method of interference with different intensities are provided. Therefore, a user can know the running state of the flowmeter in time and take relevant measures. By the measures, the problem of error metering during strong interference can be solved, the metering accuracy and reliability can be effectively improved, and the application scene of the product can be further developed.
Drawings
Fig. 1 is a block flow diagram illustrating a method for diagnosing and processing flow signal interference for a vortex flowmeter according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a method for diagnosing and processing flow signal interference for a vortex flowmeter according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a flow signal disturbance diagnosing and processing apparatus for a vortex flowmeter according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the present invention is further described below with reference to the accompanying drawings and the detailed description. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Based on the disadvantages of the prior art, an embodiment of the present invention provides a specific implementation of a method for diagnosing and processing interference of a flow signal for a vortex flowmeter, as shown in fig. 1, the method specifically includes:
step S110: simultaneously acquiring output signals of two piezoelectric sensors positioned in the vortex flowmeter to respectively obtain a first original signal S1 and a second original signal S2;
step S120: amplifying the first original signal S1 to obtain a first amplified signal S3;
step S130: amplifying the second original signal S2 to obtain a second amplified signal S4;
step S140: differentially amplifying the first amplified signal S3 and the second amplified signal S4, and shaping and filtering to obtain a main flow frequency F1;
step S150: selecting a first original signal S1 or a second original signal S2 for amplification, shaping and filtering to obtain an auxiliary flow frequency F2;
step S160: calculating according to the main flow frequency F1 and the auxiliary flow frequency F2 to obtain an absolute value delta of absolute deviation and an absolute value delta of relative deviation of the main flow frequency F1 and the auxiliary flow frequency F2;
step S170: judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1;
step S180: and generating interference alarm information according to the interference degree.
In this embodiment, a main flow signal frequency is designed to be the differential amplified output of two piezoelectric sensors, and an auxiliary flow signal is directly amplified output of one of the two piezoelectric sensors. According to different flow signal frequency sections, the absolute value delta of the relative deviation and the absolute value delta of the absolute deviation between the main flow frequency F1 and the auxiliary flow frequency F2 are adopted to judge the interference condition of the vortex flowmeter caused by mechanical vibration and pressure fluctuation in use, and relevant interference alarm information, judgment processes of interference with different intensities and processing methods are provided. Therefore, a user can know the running state of the flowmeter in time and take relevant measures. By the measures, the problem of error metering during strong interference can be solved, the accuracy and the reliability of metering can be effectively improved, and the application scene of products can be further developed.
In an embodiment of the present invention, after the first amplified signal S3 and the second amplified signal S4 are obtained, the update time of the main flow rate frequency F1 and the auxiliary flow rate frequency F2 needs to be configured, and the number of pulses counted in each update time interval is at least 50. For example, the update time is configured to be 2s, and the number of counted pulses in the 2s time is at least 50, so as to ensure the integrity of data and improve the accuracy of subsequent data processing.
Note that the absolute value Δ of the absolute deviation is obtained by the following equation:
Δ = | F1-F2| in Hz;
the absolute value δ of the relative deviation is obtained by the following formula:
In an embodiment of the present invention, as shown in fig. 2, step S170 includes a determination that the primary flow frequency F1 does not interfere, and the specific determination steps are as follows:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the first percentage threshold B,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value delta of the absolute deviation is less than or equal to the third frequency threshold D, judging that the interference degree of the main flow frequency F1 is not interference, and calculating the flow Q based on the main flow frequency F1.
In this embodiment, it is determined that the main flow frequency F1 is not interfered, and generally, the first frequency threshold a is greater than the second frequency threshold C, for example, the first frequency threshold a may be configured to be 50Hz, the first percentage threshold B may be configured to be 2%, the second frequency threshold C may be configured to be 10Hz, and the third frequency threshold D may be configured to be 2Hz. The method respectively judges from two angles of absolute deviation and relative deviation, and the credibility of the result is higher; the judgment process only sets the comparison of four threshold parameters, and the judgment speed is higher.
Based on the foregoing embodiment, in this embodiment, as shown in fig. 2, step S170 further includes determining the weak interference situation of the primary flow frequency F1, and the specific determination steps are as follows:
when the main flow frequency F1 is more than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is less than or equal to the second percentage threshold E,
or when the second frequency threshold value C is less than or equal to the main flow frequency F1 and less than the first frequency threshold value A, and the absolute value delta of the absolute deviation is less than or equal to the fourth frequency threshold value F, the interference degree of the main flow frequency F1 is judged to be weak interference, and the flow Q is calculated based on the main flow frequency F1.
In this embodiment, the main flow frequency F1 is judged to be in a weak interference condition, and the judgment on the main flow frequency F1 to be in an interference-free condition increases the range of the threshold to be compared, generally, the fourth frequency threshold F is greater than the third frequency threshold D, and the second percentage threshold E is greater than the first percentage threshold B, which indicates that the interference on the main flow frequency F1 is strengthened, for example, the second percentage threshold E may be configured to be 5%, and the fourth frequency threshold F may be configured to be 5Hz. The judgment is carried out from two angles of absolute deviation and relative deviation, and the credibility of the result is improved; in the judgment process, only the comparison of four threshold parameters is set, and the judgment speed is increased.
Based on the foregoing embodiment, in this embodiment, as shown in fig. 2, step S170 further includes determining that the main flow frequency F1 is in a strong interference situation, and the specific determining steps are as follows:
when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, and the auxiliary flow frequency F2 is greater than the main flow frequency F1, the auxiliary flow frequency F2 is greater than or equal to the first frequency threshold a, and the absolute value delta of the relative deviation is greater than or equal to the third percentage threshold G,
or the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, and when the auxiliary flow frequency F2 is larger than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the auxiliary flow frequency F2 and smaller than the first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the numerical value of the auxiliary flow frequency F2, the interfered degree of the main flow frequency F1 is judged to be strong interference, and the flow Q is zero.
In this embodiment, a strong interference situation of the main flow frequency F1 is determined, and generally, the third percentage threshold G is greater than the second percentage threshold E, which indicates that the interference suffered by the main flow frequency F1 is further strengthened, for example, the third percentage threshold G may be configured to be 50%. The method also has the advantages of higher credibility of the result and higher judgment speed.
Based on the foregoing embodiment, in this embodiment, as shown in fig. 2, step S170 further includes determining a general interference situation of the main flow rate frequency F1, and the specific determining steps are as follows:
when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the auxiliary flow frequency F2 being greater than or equal to the first frequency threshold a, the second percentage threshold E < the absolute value delta of the relative deviation < the third percentage threshold G,
or when the absolute value delta of the relative deviation > a second percentage threshold E, the absolute value delta of the absolute deviation > a fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the second frequency threshold C is less than or equal to the auxiliary flow frequency F2< the first frequency threshold A, the absolute value delta of the absolute deviation < half the value of the auxiliary flow frequency F2,
or when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2< the main flow frequency F1, the main flow frequency > the first frequency threshold a,
or when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is less than the main flow frequency F1, the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A, and the absolute value delta of the absolute deviation is greater than or equal to half of the value of the auxiliary flow frequency F2, the interfered degree of the main flow frequency F1 is judged to be general interference, and the flow Q is calculated based on the main flow frequency F1 and is recorded independently.
In this embodiment, a general interference situation of the main flow rate frequency F1 can be identified omnidirectionally, and the flow rate Q calculated based on the main flow rate frequency F1 is recorded separately, so that history tracing is facilitated.
Based on the foregoing embodiment, in this embodiment, as shown in fig. 2, step S170 further includes a determination that there is no interference with the main flow frequency F1, and the specific determination steps are as follows:
when the primary flow frequency F1< the second frequency threshold C, or the secondary flow frequency F2< the second frequency threshold C, the flow Q meter is zero.
It is understood that the first frequency threshold a, the first percentage threshold B, the second frequency threshold C, the third frequency threshold D, the second percentage threshold E, the fourth frequency threshold F and the third percentage threshold G may be adjusted according to specific conditions.
In an embodiment of the present invention, as shown in fig. 2, according to the interference degree of the primary traffic frequency F1 determined in step S170, a weak interference flag is generated according to weak interference, a general interference flag is generated according to general interference, and a strong interference flag is generated according to strong interference. The operational condition of the flow meter is presented to the user in a more intuitive manner.
Based on the same inventive concept, the embodiment of the present application further provides a device for diagnosing and processing the interference of the flow signal for the vortex flowmeter, which can be used to implement the method for diagnosing and processing the interference of the flow signal for the vortex flowmeter described in the above embodiments, as described in the following embodiments. The principle of the device for diagnosing and processing the interference of the flow signal for the vortex flowmeter is similar to the method for diagnosing and processing the interference of the flow signal for the vortex flowmeter, so the implementation of the device for diagnosing and processing the interference of the flow signal for the vortex flowmeter can be referred to the implementation of the method for diagnosing and processing the interference of the flow signal for the vortex flowmeter, and repeated parts are not repeated. As used below, the term unit or module may be a combination of software and/or hardware that implements a predetermined function. While the system described in the embodiments below is preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.
The invention provides a flow signal interference diagnosis and processing device for a vortex flowmeter, as shown in fig. 3, the device comprises:
the first piezoelectric sensor 210 is arranged on the acquisition vortex flowmeter and outputs a first original signal S1;
the second piezoelectric sensor 220 is arranged on the acquisition vortex flowmeter and outputs a second original signal S2;
a first amplifier 230, configured to amplify the first original signal S1 to obtain a first amplified signal S3;
a second amplifier 240, configured to amplify the second original signal S2 to obtain a second amplified signal S4;
a differential amplifier 250 for differentially amplifying the first amplified signal S3 and the second amplified signal S4;
a first shaping filter 260; the output signal shaping filter is used for shaping and filtering the output signal of the differential amplifier to obtain the main flow frequency F1;
a third amplifier 270, configured to select the first original signal S1 or the second original signal S2 for amplification;
a first shaping filter 280; the frequency shaping and filtering device is used for shaping and filtering an output signal of the third amplifier to obtain an auxiliary flow frequency F2;
the microprocessor 290 is used for calculating an absolute value delta of an absolute deviation and an absolute value delta of a relative deviation according to the main flow frequency F1 and the auxiliary flow frequency F2; judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1; and generating interference alarm information according to the interference degree.
In the present embodiment, the microprocessor 290 may be a DSP (Digital Signal Processing) Digital Signal processor, an FPGA (Field-Programmable Gate Array), an MCU (Microcontroller Unit) system board, an SoC (system on a chip) system board, or a PLC (Programmable Logic Controller) minimum system including I/O, as will be understood by those skilled in the art. The above-described functions of the microprocessor 290 can be implemented by preset control logic.
In an embodiment of the present invention, the microprocessor 290 is further configured to: after the first amplified signal S3 and the second amplified signal S4 are obtained, the update time of the main flow rate frequency F1 and the auxiliary flow rate frequency F2 is configured, and the number of pulses counted in each update time interval is at least 50.
In an embodiment of the present invention, the microprocessor 290 is further configured to: when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the first percentage threshold B,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value delta of the absolute deviation is less than or equal to the third frequency threshold D, judging that the interference degree of the main flow frequency F1 is not interference, and calculating the flow Q based on the main flow frequency F1.
In an embodiment of the present invention, the microprocessor 290 is further configured to: when the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, the main flow frequency F1 is larger than or equal to a first frequency threshold A, and the absolute value delta of the relative deviation is smaller than or equal to the second percentage threshold E,
or when the absolute value delta of the relative deviation is larger than the second percentage threshold E, the absolute value delta of the absolute deviation is larger than the fourth frequency threshold F, the second frequency threshold C is smaller than or equal to the main flow frequency F1, the first frequency threshold A is smaller than or equal to the first frequency threshold A, and the absolute value delta of the absolute deviation is smaller than or equal to the fourth frequency threshold F, the interference degree of the main flow frequency F1 is judged to be weak interference, and the flow Q is calculated on the basis of the main flow frequency F1.
In an embodiment of the apparatus for diagnosing and processing interference of a flow signal for a vortex flowmeter according to the present invention, the microprocessor 290 is further configured to: when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is greater than the main flow frequency F1, the auxiliary flow frequency F2 is greater than or equal to the first frequency threshold a, and the absolute value delta of the relative deviation is greater than or equal to the third percentage threshold G,
or when the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, the auxiliary flow frequency F2 is larger than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the auxiliary flow frequency F2 and smaller than a first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be strong interference, and the flow Q is zero.
In an embodiment of the present invention, the microprocessor 290 is further configured to: when the absolute value δ of the relative deviation > the second percentage threshold E, the absolute value Δ of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the auxiliary flow frequency F2 being greater than or equal to the first frequency threshold a, the second percentage threshold E < the absolute value δ of the relative deviation < the third percentage threshold G,
or when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, and the auxiliary flow frequency F2 is greater than the main flow frequency F1, the second frequency threshold C is less than or equal to the auxiliary flow frequency F2< the first frequency threshold A, the absolute value delta of the absolute deviation is less than half the value of the auxiliary flow frequency F2,
or when the absolute value delta of the relative deviation > the second percentage threshold E, the absolute value delta of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2< the main flow frequency F1, the main flow frequency > the first frequency threshold a,
or when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is less than the main flow frequency F1, the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A, and the absolute value delta of the absolute deviation is greater than or equal to half of the value of the auxiliary flow frequency F2, the interfered degree of the main flow frequency F1 is judged to be general interference, and the flow Q is calculated based on the main flow frequency F1 and is recorded independently.
In an embodiment of the present invention, the microprocessor 290 is further configured to: when the primary flow frequency F1< the second frequency threshold C, or the secondary flow frequency F2< the second frequency threshold C, the flow Q meter is zero.
In an embodiment of the apparatus for diagnosing and processing interference of a flow signal for a vortex flowmeter according to the present invention, the microprocessor 290 is further configured to: generating a weak interference mark according to the weak interference;
generating a general interference flag according to the general interference;
and generating a strong interference mark according to the strong interference.
An embodiment of the present application further provides a specific implementation manner of an electronic device, which is capable of implementing all steps in the method in the foregoing embodiment, and referring to fig. 4, the electronic device 300 specifically includes the following contents:
a processor 310, a memory 320, a communication unit 330, and a bus 340;
the processor 310, the memory 320 and the communication unit 330 complete communication with each other through the bus 340; the communication unit 330 is used for implementing information transmission between server-side devices and terminal devices and other related devices.
The processor 310 is used to call up a computer program in the memory 320, and when the processor executes the computer program, the processor implements all the steps of the flow signal interference diagnosis and processing method for the vortex flowmeter in the above embodiment.
Those of ordinary skill in the art will understand that: the Memory may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
The memory is used for storing programs, and the processor executes the programs after receiving the execution instructions. Further, the software programs and modules within the aforementioned memories may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor may be an integrated circuit chip having signal processing capabilities. The processor may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The present application further provides a computer-readable storage medium, which includes a program, when executed by a processor, for performing the method provided by any of the foregoing embodiments of the flow signal disturbance diagnosis and processing method for a vortex flowmeter.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media capable of storing program codes, such as ROM, RAM, magnetic or optical disk, etc., and the specific type of media is not limited in this application.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. A method for diagnosing and processing disturbance of a flow signal for a vortex flowmeter, the method comprising:
simultaneously acquiring output signals of two piezoelectric sensors positioned in the vortex flowmeter to respectively obtain a first original signal S1 and a second original signal S2;
amplifying the first original signal S1 to obtain a first amplified signal S3;
amplifying the second original signal S2 to obtain a second amplified signal S4;
differentially amplifying the first amplified signal S3 and the second amplified signal S4, shaping and filtering to obtain a main flow frequency F1;
selecting a first original signal S1 or a second original signal S2 for amplification, shaping and filtering to obtain an auxiliary flow frequency F2;
calculating according to the main flow frequency F1 and the auxiliary flow frequency F2 to obtain an absolute value delta of absolute deviation and an absolute value delta of relative deviation of the main flow frequency F1 and the auxiliary flow frequency F2;
judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1;
and generating interference alarm information according to the interference degree.
2. A method for diagnosing and processing the disturbance of a flow signal for a vortex flowmeter according to claim 1, wherein after obtaining the first amplified signal S3 and the second amplified signal S4, the updating times of the primary flow frequency F1 and the secondary flow frequency F2 are configured, and the number of pulses counted in each updating time interval is at least 50.
3. A method for diagnosing and processing the disturbance of the flow signal of the vortex flowmeter according to claim 1, wherein the determining the disturbance degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation and the absolute value δ of the relative deviation comprises:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the first percentage threshold B,
or when the second frequency threshold C is less than or equal to the main flow frequency F1 and less than the first frequency threshold A and the absolute value delta of the absolute deviation is less than or equal to the third frequency threshold D, judging that the interference degree of the main flow frequency F1 is not interference, and calculating the flow Q based on the main flow frequency F1.
4. A method for diagnosing and processing the disturbance of the flow signal of the vortex flowmeter according to claim 1, wherein the determining the disturbance degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation and the absolute value δ of the relative deviation further comprises:
when the main flow frequency F1 is larger than or equal to the first frequency threshold A and the absolute value delta of the relative deviation is smaller than or equal to the second percentage threshold E,
or when the second frequency threshold value C is less than or equal to the main flow frequency F1 and less than the first frequency threshold value A, and the absolute value delta of the absolute deviation is less than or equal to the fourth frequency threshold value F, the interference degree of the main flow frequency F1 is judged to be weak interference, and the flow Q is calculated based on the main flow frequency F1.
5. A method for diagnosing and processing flow signal disturbance for a vortex flowmeter according to claim 1, wherein the determining the disturbance level of the main flow frequency F1 based on the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation, and the absolute value δ of the relative deviation further comprises:
when the absolute value delta of the relative deviation is greater than the second percentage threshold E, the absolute value delta of the absolute deviation is greater than the fourth frequency threshold F, the auxiliary flow frequency F2 is greater than the main flow frequency F1, the auxiliary flow frequency F2 is greater than or equal to the first frequency threshold a, and the absolute value delta of the relative deviation is greater than or equal to the third percentage threshold G,
or when the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, the auxiliary flow frequency F2 is larger than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the auxiliary flow frequency F2 and smaller than a first frequency threshold A, and the absolute value delta of the absolute deviation is larger than or equal to half of the value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be strong interference, and the flow Q is zero.
6. A method for diagnosing and processing the disturbance of the flow signal of the vortex flowmeter according to claim 1, wherein the determining the disturbance degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation and the absolute value δ of the relative deviation further comprises:
when the absolute value δ of the relative deviation > the second percentage threshold E, the absolute value Δ of the absolute deviation > the fourth frequency threshold F, and the auxiliary flow frequency F2> the main flow frequency F1, the auxiliary flow frequency F2 being greater than or equal to the first frequency threshold a, the second percentage threshold E < the absolute value δ of the relative deviation < the third percentage threshold G,
or the absolute value delta of the relative deviation > a second percentage threshold E, the absolute value delta of the absolute deviation > a fourth frequency threshold F, and when the secondary flow frequency F2> the primary flow frequency F1, the second frequency threshold C is less than or equal to the secondary flow frequency F2< the first frequency threshold a, the absolute value delta of the absolute deviation < half the value of the secondary flow frequency F2,
or absolute value delta of the relative deviation > second percentage threshold E, absolute value delta of the absolute deviation > fourth frequency threshold F, and auxiliary flow frequency F2< main flow frequency F1, main flow frequency F1> first frequency threshold a,
or the absolute value delta of the relative deviation is larger than a second percentage threshold E, the absolute value delta of the absolute deviation is larger than a fourth frequency threshold F, the auxiliary flow frequency F2 is smaller than the main flow frequency F1, the second frequency threshold C is smaller than or equal to the main flow frequency F1 and smaller than the first frequency threshold A, when the absolute value delta of the absolute deviation is larger than or equal to half of the numerical value of the auxiliary flow frequency F2, the interference degree of the main flow frequency F1 is judged to be general interference, and the flow Q is calculated based on the main flow frequency F1 and is recorded independently.
7. A method for diagnosing and processing the disturbance of the flow signal of the vortex flowmeter according to claim 1, wherein the determining the disturbance degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value Δ of the absolute deviation and the absolute value δ of the relative deviation further comprises:
when the primary flow frequency F1< the second frequency threshold C, or the secondary flow frequency F2< the second frequency threshold C, the flow Q meter is zero.
8. A method for diagnosing and processing disturbance of a flow signal for a vortex flowmeter as set forth in claim 1, wherein said generating disturbance alarm information based on the degree of disturbance comprises:
generating a weak interference mark according to the weak interference;
generating a general interference flag according to the general interference;
and generating a strong interference mark according to the strong interference.
9. A flow signal disturbance diagnostic and processing apparatus for a vortex flowmeter, the apparatus comprising:
the first piezoelectric sensor is arranged on the acquisition vortex flowmeter and outputs a first original signal S1;
the second piezoelectric sensor is arranged on the acquisition vortex flowmeter and outputs a second original signal S2;
the first amplifier is used for amplifying the first original signal S1 to obtain a first amplified signal S3;
the second amplifier is used for amplifying the second original signal S2 to obtain a second amplified signal S4;
a differential amplifier for differentially amplifying the first amplified signal S3 and the second amplified signal S4;
a first shaping filter; the device is used for shaping and filtering an output signal of the differential amplifier to obtain a main flow frequency F1;
the third amplifier is used for selecting the first original signal S1 or the second original signal S2 to amplify;
a first shaping filter; the frequency shaping and filtering device is used for shaping and filtering an output signal of the third amplifier to obtain an auxiliary flow frequency F2;
the microprocessor is used for calculating and obtaining an absolute value delta of an absolute deviation and an absolute value delta of a relative deviation of the main flow frequency F1 and the auxiliary flow frequency F2; judging the interference degree of the main flow frequency F1 according to the main flow frequency F1, the auxiliary flow frequency F2, the absolute value delta of the absolute deviation and the absolute value delta of the relative deviation, and determining the calculation reference of the flow Q according to the interference degree of the main flow frequency F1; and generating interference alarm information according to the interference degree.
10. An electronic device, comprising:
a processor, a memory, an interface to communicate with a gateway;
the memory is used for storing programs and data, and the processor calls the programs stored in the memory to execute the flow signal interference diagnosis and processing method for the vortex flowmeter as claimed in any one of claims 1 to 8.
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| CN117073772A (en) * | 2023-03-22 | 2023-11-17 | 天津大学 | Method for measuring moisture gas phase flow by utilizing MEMS triaxial acceleration frequency information of precession vortex |
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| CN117073772A (en) * | 2023-03-22 | 2023-11-17 | 天津大学 | Method for measuring moisture gas phase flow by utilizing MEMS triaxial acceleration frequency information of precession vortex |
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