CN109307646B - Decoupling method and device of solid holdup pulsation signal - Google Patents
Decoupling method and device of solid holdup pulsation signal Download PDFInfo
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Abstract
The invention provides a decoupling method and a device of a solid holdup pulsation signal, comprising the following steps: determining a bubble phase threshold and a clustering phase threshold of a solid holdup pulsation signal to be decoupled, wherein the solid holdup pulsation signal to be decoupled is obtained from dense gas-solid flow by a first probe; extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold; extracting an available bunching signal in the solid holdup pulsation signal to be decoupled according to the bunching phase threshold; and decoupling the solid holdup pulsation signal according to the bubble signal and the agglomeration signal. The decoupling method of the solid holdup pulsation signal improves decoupling accuracy.
Description
Technical Field
The invention relates to the field of measurement, in particular to a decoupling method and a decoupling device for a solid holdup pulsation signal.
Background
The method for measuring the mesoscale flow structure of the dense gas-solid fluidized bed by using the optical fiber probe method is a mature measuring method, has the advantages of high accuracy, reliable result, small interference and the like, is widely applied to the measurement of the dynamic evolution rule of particle agglomeration in a fast bed and a lifting pipe, however, due to the nonlinear characteristic and the multi-drainage territory of dense gas-solid flow, a large amount of mesoscale flow information contained in a solid content rate pulse signal obtained by measurement is difficult to decouple before.
The existing decoupling method of the solid holdup pulsating signal is mainly to divide the solid holdup pulsating signal into an approximate signal in a low-frequency range and a detail signal in a high-frequency range and to decouple the divided signals by adopting a wavelet analysis method.
Disclosure of Invention
The invention provides a decoupling method and a decoupling device for a solid content rate pulse signal in dense gas-solid flow, which aim to improve the decoupling accuracy.
The first aspect of the invention provides a decoupling method of a solid holdup ripple signal, which comprises the following steps:
determining a bubble phase threshold and a clustering phase threshold of a solid holdup pulsation signal to be decoupled, wherein the solid holdup pulsation signal to be decoupled is obtained from dense gas-solid flow by a first probe;
extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold;
extracting an available bunching signal in the solid holdup pulsation signal to be decoupled according to the bunching phase threshold;
and determining the bubble solid content rate distribution, the bubble appearance frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the cluster solid content rate distribution, the cluster average solid content rate, the cluster appearance frequency, the cluster velocity distribution, the cluster average velocity, the cluster chord length distribution, the cluster average chord length, the cluster diameter distribution and the cluster average diameter of the solid content rate pulse signal to be decoupled according to the available bubble signal and the available cluster signal.
Optionally, the determining a bubble phase threshold and a cluster phase threshold of the solid holdup pulsation signal to be decoupled includes:
determining the volume fraction of the bubble phase, the average solid content of the bubble phase and the average solid content of dense phase of the decoupled solid content pulsation signal according to the first-order to fourth-order statistical moments in the decoupled solid content pulsation signal;
determining a bubble phase threshold value of the solid holdup pulsation signal to be decoupled according to the bubble phase volume fraction, the bubble phase average solid holdup and the dense phase average solid holdup;
and determining the agglomeration phase threshold according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
Optionally, the extracting, according to the bubble phase threshold, an available bubble signal in the solid holdup pulsation signal to be decoupled includes:
according to the bubble phase threshold, extracting a first bubble signal from a solid holdup pulsating signal to be decoupled, which is obtained by the first probe, and extracting a second bubble signal from a reference solid holdup pulsating signal, which is obtained by the second probe; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal;
and matching the first bubble signal and the second bubble signal, and determining an available bubble signal in the solid holdup pulsation signal to be decoupled.
Optionally, the extracting, according to the clustering phase threshold, an available clustering signal in the solid holdup pulsation signal to be decoupled includes:
according to the clustering phase threshold, extracting a first clustering signal from a solid holdup pulsating signal to be decoupled, which is obtained by the first probe, and extracting a second clustering signal from a reference solid holdup pulsating signal, which is obtained by the second probe; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
and matching the first clustering signal with the second clustering signal, and determining an available clustering signal in the solid holdup pulsation signal to be decoupled.
Optionally, after determining the bubble phase threshold and the cluster phase threshold of the solid holdup pulsation signal to be decoupled, the method further includes:
determining a bubble phase fraction, a bubble phase average solid content and a bubble phase average solid content standard deviation of the solid content pulsation signal according to the bubble phase threshold;
and determining the dense phase fraction, the agglomerated phase fraction, the dense average solid content and the standard deviation of the dense average solid content of the solid content pulsation signal according to the agglomerated phase threshold.
A second aspect of the present invention provides a decoupling apparatus for a solid holdup ripple signal, including:
the threshold value determining module is used for determining a bubble phase threshold value and a clustering phase threshold value of a solid holdup pulsating signal to be decoupled, wherein the solid holdup pulsating signal to be decoupled is obtained from dense gas-solid flow by a first probe;
the bubble signal module is used for extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold;
the clustering signal module is used for extracting an available clustering signal in the solid holdup pulsation signal to be decoupled according to the clustering phase threshold;
and the first calculation module is used for determining the bubble solid holdup distribution, the bubble occurrence frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the cluster solid holdup distribution, the cluster average solid holdup, the cluster occurrence frequency, the cluster velocity distribution, the cluster average velocity, the cluster chord length distribution, the cluster average chord length, the cluster diameter distribution and the cluster average diameter of the solid holdup pulsation signal to be decoupled according to the available bubble signal and the available cluster signal.
Optionally, the threshold determining module includes:
the parameter determining unit is used for determining the volume fraction of the bubble phase, the average solid content rate of the bubble phase and the dense-phase average solid content rate of the decoupled solid content rate pulsating signal according to the first-order to fourth-order statistical moments in the decoupled solid content rate pulsating signal;
the bubble phase threshold value determining unit is used for determining a bubble phase threshold value of the solid content pulsation signal to be decoupled according to the bubble phase fraction, the bubble phase average solid content and the dense phase average solid content;
and the agglomeration phase threshold value determining unit is used for determining the agglomeration phase threshold value according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
Optionally, the bubble signal module includes:
the reference bubble signal determining unit is used for extracting a first bubble signal from the solid holdup pulsating signal to be decoupled, which is acquired by the first probe, and extracting a second bubble signal from the reference solid holdup pulsating signal, which is acquired by the second probe, according to the bubble phase threshold; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal;
and the first matching unit is used for matching the first bubble signal and the second bubble signal and determining an available bubble signal in the solid holdup pulsation signal to be decoupled.
Optionally, the clump signal module includes:
the reference clustering signal determining unit is used for extracting a first clustering signal from the solid holdup pulsating signal to be decoupled, which is acquired by the first probe, and extracting a second clustering signal from the reference solid holdup pulsating signal, which is acquired by the second probe, according to the clustering phase threshold; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
and the second matching unit is used for matching the first clustering signal with the second clustering signal and determining an available clustering signal in the solid holdup pulsation signal to be decoupled.
Optionally, the method further includes:
the second calculation unit is used for determining the bubble phase fraction, the average bubble phase solid content and the standard deviation of the average bubble solid content of the solid content pulsation signal according to the bubble phase threshold;
and the third calculating unit is used for determining the dense phase fraction, the agglomerated phase fraction, the dense average solid content rate and the standard deviation of the dense average solid content rate of the solid content rate pulsation signal according to the agglomerated phase threshold.
In a third aspect of the present invention, there is provided an electronic device comprising:
a memory and a processor;
the memory for storing executable instructions of the processor;
the processor is configured to perform the method referred to in the first aspect and alternatives thereof via execution of the executable instructions.
In a fourth aspect of the present invention, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the method of the first aspect and its alternatives.
According to the decoupling method and device for the solid holdup pulse signal, the available bubble signal and the available conglomerate signal are extracted from the solid holdup pulse signal to be decoupled through the bubble phase threshold and the conglomerate phase threshold to conduct decoupling, and therefore the decoupling accuracy of the solid holdup pulse signal is improved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a decoupling method for a solid holdup pulsation signal according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of another decoupling method for a solid holdup ripple signal according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of step S21 according to the embodiment of the present invention;
fig. 4 is a schematic flowchart of a step S22 according to the embodiment of the present invention;
fig. 5 is a schematic flowchart of step S23 according to the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a decoupling apparatus for a solid holdup pulsation signal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another decoupling apparatus for a solid holdup ripple signal according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a threshold determining module according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a bubble signal module according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a clump signal module according to an embodiment of the present invention.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present invention, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, from which B can be determined. Determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
As used herein, "if" may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context.
Fig. 1 is a schematic flow diagram of a decoupling method for a solid holdup pulse signal according to an embodiment of the present invention, and referring to fig. 1, the decoupling method for a solid holdup pulse signal according to an embodiment of the present invention is applied to a decoupling method device for a solid holdup pulse signal, and mainly includes steps S11 to S14, which are as follows:
s11, determining a bubble phase threshold and a clustering phase threshold of the solid holdup pulsating signal to be decoupled, wherein the solid holdup pulsating signal to be decoupled is obtained from the dense gas-solid flow by a first probe.
In a specific implementation process, firstly, a decoupled solid holdup pulsation signal is obtained, specifically, a solid holdup pulsation signal in dense gas-solid flow is obtained, two probes are generally adopted to respectively collect signals, wherein a signal collected by one probe is used as a signal to be decoupled, and a signal collected by the other probe is used as a reference signal.
To determine the bubble phase threshold, first to fourth order statistical moments of the solid holdup pulsation signal are counted, so that corresponding bubble phase fraction, bubble phase solid holdup and dense phase solid holdup are calculated, and then, a proper bubble phase threshold is determined by adopting a traversal algorithm. The threshold for the agglomeration phase may be the solids holdup at which the dense gas-solids stream initiates fluidization.
And S12, extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold.
In the specific implementation process, firstly, signals with the solid holdup higher than the bubble phase threshold are removed, secondly, bubble valleys generated by the same bubble are respectively identified from the solid holdup pulsating signal to be decoupled and the reference solid holdup pulsating signal, and the set of all bubble valleys meeting the conditions is used as an available bubble signal.
And S13, extracting an available bunching signal in the solid holdup pulsation signal to be decoupled according to the bunching phase threshold.
In the specific implementation process, firstly, signals with the solid holdup lower than the threshold value of the agglomeration phase are removed, secondly, particle agglomeration peaks generated by the same agglomeration are respectively identified from the solid holdup pulse signal to be decoupled and the reference solid holdup pulse signal, and all particle agglomeration peaks meeting the conditions are collected to be used as available agglomeration signals.
And S14, determining the bubble solid holdup distribution, the bubble appearance frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the agglomeration solid holdup distribution, the agglomeration average solid holdup, the agglomeration appearance frequency, the agglomeration velocity distribution, the agglomeration average velocity, the agglomeration chord length distribution, the agglomeration average chord length, the agglomeration diameter distribution and the agglomeration average diameter of the solid holdup pulsation signal to be decoupled according to the available bubble signal and the available agglomeration signal.
In practical applications, the bubble appearance frequency, the bubble average velocity, the bubble average chord length, the agglomeration average solid content, the agglomeration appearance frequency, the agglomeration average velocity, and the agglomeration average chord length of the solid content pulsation signal can be calculated according to the equations (1) to (9). Specifically, the formulas (1) to (9) are:
wherein the content of the first and second substances,
for frequency of occurrence of bubbles, nbIs the number of bubbles, nagIs the number of clusters, T is the sampling time,
is the average velocity of the bubbles, ub,xIn order to have a distribution of the bubble velocity,
is the average chord length of the bubble, /)b,xIs a distribution of the chord length of the air bubble,
is the average solid content of agglomeration，FagIn order to increase the frequency of occurrence of clusters,
is the mean speed of agglomeration, uag,x'In order to distribute the speed of agglomeration,
is the average chord length of the agglomerates,/ag,x'Is a cluster chord length distribution, d is the distance between two fiber probes, Tx,1Is the start time, T, of the xth bubble in the first bubble peakx,2Is the end time of the xth bubble in the first bubble peak, Ty,1Is the start time, T, of the xth bubble in the second bubble peaky,2Is the end time of the xth bubble in the second bubble peak, τb,xDuration of the x-th bubble, Tx,1'is the start time of x' clusters in the first cluster peak, Tx,2'is the end time of the x' th cluster in the first cluster peak, Ty,1'is the start time of the x' th cluster in the second cluster peak, Ty,2'is the end time of the x' th cluster in the second cluster peak, τag,x'Duration of the x' th cluster, f (. epsilon.)sb) Is a bubble solid holdup distribution function, f (epsilon)sd) As a function of the agglomerate solid holdup distribution.
Further, assuming that the agglomerates are spherical, the mean diameter of the agglomerates is calculated according to equation (10):
wherein the content of the first and second substances,
is the mean diameter of the agglomerates, dag,x,Is the diameter of the x' th cluster, PcFor a cluster mean diameter distribution, PpIs a cluster chord length probability density distribution.
According to the decoupling method of the solid holdup pulsation signal, the bubble signal and the cluster signal are extracted from the solid holdup pulsation signal to be decoupled through the bubble phase threshold and the cluster phase threshold to conduct decoupling, and therefore the decoupling accuracy of the solid holdup pulsation signal is improved.
Fig. 2 is a schematic flow chart of another decoupling method for a solid rate ripple signal according to an embodiment of the present invention, and referring to fig. 2, the decoupling method for a solid rate ripple signal includes: S21-S26, which is as follows:
s21: and determining a bubble phase threshold and a clustering phase threshold of the solid holdup pulsation signal to be decoupled, wherein the solid holdup pulsation signal to be decoupled is obtained from the dense gas-solid flow by a first probe.
S22: and extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold.
S23: and extracting an available clustering signal in the solid holdup pulsation signal to be decoupled according to the clustering phase threshold.
S24: and determining the bubble solid content rate distribution, the bubble appearance frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the cluster solid content rate distribution, the cluster average solid content rate, the cluster appearance frequency, the cluster velocity distribution, the cluster average velocity, the cluster chord length distribution, the cluster average chord length, the cluster diameter distribution and the cluster average diameter of the solid content rate pulse signal to be decoupled according to the available bubble signal and the available cluster signal.
The technical terms, technical effects, technical features, and alternative embodiments of steps S21 through S24 can be understood with reference to steps S11 through S14 shown in fig. 1, and repeated contents will not be described herein.
And S25, determining the bubble phase fraction, the average bubble phase solid content and the standard deviation of the average bubble phase solid content of the solid content pulsation signal according to the bubble phase threshold.
In a specific implementation process, according to the bubble phase threshold, the bubble phase fraction, the average bubble phase solid content, and the standard deviation of the average bubble phase solid content of the solid content pulsation signal can be calculated according to equations (11) to (13). Specifically, the formulas (11) to (13) are:
wherein f isdIs the phase fraction of the gas bubbles,
is the average solid content of the bubble phase, σsbIs the standard deviation of the mean solid holdup of the bubble phase, epsilonsbIs the gas bubble fraction, εsdThe solid content of the dense phase is the solid content,
is the average solid content.
And S26, determining the dense phase fraction, the agglomerated phase fraction, the dense average solid content and the standard deviation of the dense average solid content of the solid content pulsation signal according to the agglomerated phase threshold.
In a specific implementation process, according to the threshold of the agglomerated phase, the emulsified phase fraction, the agglomerated phase fraction, the dense-phase average solid content rate, and the dense-phase average solid content rate standard deviation of the solid content rate pulsation signal can be calculated according to the formulas (14) to (17). Specifically, the formulas (14) to (17) are:
wherein f iseIs the phase fraction of the emulsified phase, fagThe relative fraction of the agglomerated phase is shown,
is the dense phase average solid content, σsdIs the standard deviation of the mean solid content of the dense phase, nagIs epsilons>εs,mfThe number of data points; n iseIs epsilonthreshold<εs<εs,mfNumber of data points.
According to the decoupling method of the solid holdup pulsation signal, the bubble signal and the cluster signal are extracted from the solid holdup pulsation signal to be decoupled through the bubble phase threshold and the cluster phase threshold to conduct decoupling, and therefore the decoupling accuracy of the solid holdup pulsation signal is improved.
Fig. 3 is a flowchart illustrating a step S21 according to an embodiment of the present invention.
Referring to fig. 3, based on any embodiment, step S21 mainly includes steps S211 to S213, which are as follows:
s211, determining the volume fraction of the bubble phase, the average solid content of the bubble phase and the dense-phase average solid content of the decoupled solid content pulsation signal according to the first-order to fourth-order statistical moments in the decoupled solid content pulsation signal.
In a specific implementation process, a first-order to fourth-order statistical moment is obtained from the solid holdup pulse signal to be decoupled, specifically, the statistical moment comprises: average solid holdup, standard deviation, skewness, and kurtosis. Next, the bubble phase volume fraction, the bubble phase solid fraction, and the dense phase solid fraction in the solid content pulsation signal are determined according to equations (18) to (21). Specifically, the formulas (18) to (21) are:
wherein the content of the first and second substances,
is the average solid content, σ is the standard deviation, S is the skewness, K is the kurtosis, fbIs the volume fraction of the gas bubble phase,. epsilonsbIs the gas bubble phase solid holdup, epsilonsdIs the dense phase solid content.
S212, determining a bubble phase threshold value of the solid holdup pulsation signal to be decoupled according to the bubble phase volume fraction, the bubble phase average solid holdup and the dense phase average solid holdup.
In the concrete implementation process, a bubble phase threshold value is assumed, all signals smaller than the assumed bubble phase threshold value in the solid holdup pulsation signals to be decoupled are extracted to serve as bubble signals, and the average value epsilon 'of the bubble signals is calculated according to the bubble signals'sbMean value of residual signal epsilon 'except for bubble signal'sdAnd the ratio f 'of the bubble signal occurrence time to the total time of the solid holdup pulsation signal to be decoupled'bAs the assumed bubble phase fraction.
Further, when the above data satisfies the formula (19), the assumed bubble phase threshold is used as the bubble phase threshold of the specific holdup pulsation signal to be decoupled. If the average value of the bubble signal, the average value of the residual signal other than the bubble signal, and the assumed bubble phase fraction calculated using the assumed bubble phase threshold do not satisfy the formula (18), one other bubble phase threshold is assumed again until the calculated average value of the bubble signal, the average value of the residual signal other than the bubble signal, and the assumed bubble phase fraction satisfy the formula (18). Specifically, the formula (22) is:
wherein epsilonsbIs the solid content of air bubbles, epsilon'sbIs the average value of the bubble signal, εsdIs dense phase solid content of epsilon'sdIs the average of the residual signal, f, outside the bubble signalbIs the volume fraction of the bubble phase, f'bTo assume the bubble phase fraction, a, b, c can be set according to the specific dense gas-solid flow, typically a, b, c are typically no greater than 0.01.
S213, determining the agglomeration phase threshold according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
Specifically, the solid content in the dense gas-solid stream initial fluidization state may be set as the agglomeration phase threshold.
Fig. 4 is a flowchart illustrating a step S22 according to an embodiment of the present invention.
Referring to fig. 4, based on any embodiment, step S22 mainly includes steps S221 to S222, which are as follows:
s221, according to the bubble phase threshold, extracting a first bubble signal from a solid holdup pulsating signal to be decoupled, which is acquired by the first probe, and extracting a second bubble signal from a reference solid holdup pulsating signal, which is acquired by the second probe; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal.
Wherein the first bubble signal and the second bubble signal each may include a plurality of bubble valleys.
In practical application, the first bubble signal can be searched in the solid holdup pulsation signal to be decoupled along the time axis. Specifically, a first data point smaller than a bubble phase threshold in the solid holdup pulsation signal to be decoupled is used as a starting point a, the data point is searched backwards from the starting point along the time axis direction, and a first data point which is equal to the threshold and is obtained by finding out N subsequent data points which are all larger than the bubble phase threshold is used as an end point B of a bubble peak, wherein N can be specifically set according to actual conditions and is usually not smaller than 20. Then, searching the next bubble peak from the point B until all the bubble peaks in the solid holdup pulse signal to be decoupled are found, and recording all the first bubble peaksNumber x of bubble peak and start time Tx1And an end time Tx2. The extraction process of the bubble valley is the same as the bubble peak. Similarly, according to the method, the second bubble signal in the reference solid content rate pulse signal is found, and the serial number y and the start-stop time T of all the second bubble peaks are recordedy1And Ty2。
S222, matching the first bubble signal and the second bubble signal, and determining an available bubble signal in the solid holdup pulsation signal to be decoupled.
In a specific implementation process, comparing the similarity degrees of the bubble valleys in the searched first bubble signal and the second bubble signal, and if the similarity degree is not less than a set value, counting the similarity degree into the available bubble signal, wherein a similarity formula (23) of the first bubble peak and the second bubble peak is as follows:
where ρ isxyIs a correlation coefficient, x is a first bubble peak number, y is a second bubble peak number, and specifically, ρxyCan be set according to actual conditions, and usually does not exceed 0.7.
Fig. 5 is a flowchart illustrating a step S23 according to an embodiment of the present invention.
Referring to fig. 5, based on any embodiment, step S23 mainly includes steps S231 to S232, which are as follows:
s231, extracting a first clustering signal from a solid holdup pulsating signal to be decoupled, which is obtained by the first probe, according to the clustering phase threshold, and extracting a second clustering signal from a reference solid holdup pulsating signal, which is obtained by the second probe; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
in practical applications, the first bunching signal can be searched for in the solid holdup pulsatile signal to be decoupled along the time axis. In particular, the first of the solid holdup ripple signals to be decoupledAnd taking the data points which are larger than the threshold value of the cluster phase as a starting point A ', searching backwards from the starting point A ' along the time axis direction, and finding the first data point which is equal to the threshold value of the cluster phase and the subsequent continuous N ' points of which are larger than the threshold value of the cluster phase as an end point B ' of the particle cluster peak, wherein N ' is not less than 20. Then, starting from the point B ', searching the next particle agglomeration seam until all particle agglomeration peaks in the solid holdup pulsation signal to be decoupled are found, and recording serial numbers x' and starting time T 'of all first particle agglomeration'x1And an end time T'x2. The extraction method of the particle agglomeration peak is the same as that of the particle agglomeration peak. Similarly, according to the method, the second cluster signal in the reference solid content rate pulse signal is found, and the serial numbers y ' and the starting and stopping time T ' of all the second cluster signals are recorded 'y1And T'y2。
S232, matching the first cluster signal with the second cluster signal, and determining an available cluster signal in the solid holdup pulsation signal to be decoupled.
In a specific implementation process, the similarity degree of the searched first agglomeration signal and the second agglomeration signal is compared, and if the similarity degree of the first agglomeration signal and the second agglomeration signal is not less than a set value, the first agglomeration signal and the second agglomeration signal are used as available agglomeration signals, specifically, a similarity formula (24) of the first particle agglomeration and the second particle agglomeration is as follows:
wherein, ρ'xyIs a correlation coefficient, x ' is a first bubble peak number, y ' is a second bubble peak number, specifically, ρ 'xyCan be set according to actual conditions, and usually does not exceed 0.7.
According to the decoupling method of the solid holdup pulsating signal in the dense gas-solid flow, the bubble signal and the agglomeration signal are extracted from the solid holdup pulsating signal to be decoupled through the bubble phase threshold and the agglomeration phase threshold to conduct decoupling, and therefore the decoupling accuracy of the solid holdup pulsating signal is improved.
Fig. 6 is a schematic structural diagram of a decoupling apparatus for a solid holdup ripple signal according to an embodiment of the present invention.
Referring to fig. 6, the decoupling apparatus 30 for the solid rate pulsation signal includes:
the threshold determining module 31 is configured to determine a bubble phase threshold and a cluster phase threshold of a solid holdup pulsation signal to be decoupled, where the solid holdup pulsation signal to be decoupled is obtained from a dense gas-solid flow by a first probe;
the bubble signal module 32 is configured to extract an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold;
the clustering signal module 33 is configured to extract an available clustering signal from the solid holdup pulse signal to be decoupled according to the clustering phase threshold;
a first calculating module 34, configured to determine, according to the available bubble signal and the available agglomeration signal, a bubble solid content rate distribution, a bubble occurrence frequency, a bubble velocity distribution, a bubble average velocity, a bubble chord length distribution, a bubble average chord length, a agglomeration solid content rate distribution, an agglomeration average solid content rate, an agglomeration occurrence frequency, an agglomeration velocity distribution, an agglomeration average velocity, an agglomeration chord length distribution, an agglomeration average chord length, an agglomeration diameter distribution, and an agglomeration average diameter of the solid content rate pulsation signal to be decoupled.
The decoupling device for the solid holdup pulsation signal provided by the embodiment extracts the bubble signal and the conglomerate signal from the solid holdup pulsation signal to be decoupled through the bubble phase threshold and the conglomerate phase threshold to perform decoupling, so that the decoupling accuracy of the solid holdup pulsation signal is improved.
Fig. 7 is a schematic structural diagram of another decoupling apparatus for a solid holdup ripple signal according to an embodiment of the present invention.
Referring to fig. 7, the decoupling apparatus for the solid holdup ripple signal further includes:
the second calculating unit 35 is configured to determine a bubble phase fraction, a bubble phase average solid content, and a bubble phase average solid content standard deviation of the solid content pulsation signal according to the bubble phase threshold;
and a third calculating unit 36, configured to determine a dense-phase fraction, a agglomerated-phase fraction, a dense-phase average solid content rate, and a dense-phase average solid content rate standard deviation of the solid content rate pulsation signal according to the agglomerated-phase threshold.
Fig. 8 is a schematic structural diagram of a threshold determining module according to an embodiment of the present invention.
Referring to fig. 8, the threshold determining module 31 includes:
the parameter determining unit 311 is configured to determine a bubble phase volume fraction, a bubble phase average solid content rate, and a dense phase average solid content rate of the decoupled solid content rate pulsation signal according to first to fourth statistical moments in the decoupled solid content rate pulsation signal;
a bubble phase threshold determining unit 312, configured to determine a bubble phase threshold of the solid content pulsation signal to be decoupled according to the bubble phase volume fraction, the bubble phase average solid content and the dense phase average solid content;
and the agglomeration phase threshold determining unit 313 is used for determining the agglomeration phase threshold according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
Fig. 9 is a schematic structural diagram of a bubble signal module according to an embodiment of the present invention.
Referring to fig. 9, the bubble signal module 32 includes:
a reference bubble signal determining unit 321, configured to extract, according to the bubble phase threshold, a first bubble signal from the solid holdup pulsation signal to be decoupled acquired by the first probe, and extract a second bubble signal from the reference solid holdup pulsation signal acquired by the second probe; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal;
a first matching unit 322, configured to match the first bubble signal and the second bubble signal, and determine an available bubble signal in the solid holdup pulsation signal to be decoupled.
Fig. 10 is a schematic structural diagram of a clump signal module according to an embodiment of the present invention.
Referring to fig. 10, the cluster signal module 33 includes:
a reference clustering signal determining unit 331, configured to extract a first clustering signal from the solid holdup pulse signal to be decoupled, which is obtained by the first probe, and extract a second clustering signal from the reference solid holdup pulse signal, which is obtained by the second probe, according to the clustering phase threshold; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
a second matching unit 332, configured to match the first cluster signal and the second cluster signal, and determine an available cluster signal in the solid holdup pulsation signal to be decoupled.
The decoupling device for the solid holdup pulsation signal in the dense gas-solid flow provided by the embodiment extracts the bubble signal and the agglomeration signal from the solid holdup pulsation signal to be decoupled through the bubble phase threshold and the agglomeration phase threshold to perform decoupling, so that the decoupling accuracy of the solid holdup pulsation signal is improved.
The present invention also provides an electronic device, comprising: a memory and a processor;
the memory for storing executable instructions of the processor;
the processor is configured to perform the method of decoupling the solid rate ripple signal described in fig. 1-5 via execution of the executable instructions.
The readable storage medium may be a computer storage medium or a communication medium. Communication media includes any medium that facilitates transfer of a computer program from one place to another. Computer storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, a readable storage medium is coupled to the processor such that the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Additionally, the ASIC may reside in user equipment. Of course, the processor and the readable storage medium may also reside as discrete components in a communication device.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the method of decoupling a solid holdup ripple signal as described in fig. 1-5.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled 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 invention.
Claims (8)
1. A decoupling method of a solid holdup ripple signal, comprising:
determining a bubble phase threshold and a clustering phase threshold of a solid holdup pulsation signal to be decoupled, wherein the solid holdup pulsation signal to be decoupled is obtained from dense gas-solid flow by a first probe;
extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold;
extracting an available bunching signal in the solid holdup pulsation signal to be decoupled according to the bunching phase threshold;
determining the bubble solid holdup distribution, the bubble appearance frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the agglomeration solid holdup distribution, the agglomeration average solid holdup, the agglomeration appearance frequency, the agglomeration velocity distribution, the agglomeration average velocity, the agglomeration chord length distribution, the agglomeration average chord length, the agglomeration diameter distribution and the agglomeration average diameter of the solid holdup pulsation signal to be decoupled according to the available bubble signal and the available agglomeration signal;
extracting available bubble signals in the solid holdup pulsation signals to be decoupled according to the bubble phase threshold, wherein the extracting comprises the following steps:
according to the bubble phase threshold, extracting a first bubble signal from a solid holdup pulsating signal to be decoupled, which is obtained by the first probe, and extracting a second bubble signal from a reference solid holdup pulsating signal, which is obtained by the second probe; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal;
comparing the first bubble signal with the second bubble signal, and if the similarity degree of the first bubble signal and the second bubble signal is not less than a set value, determining the first bubble signal as an available bubble signal in the solid holdup pulsation signal to be decoupled;
extracting an available bunching signal in the solid holdup pulsation signal to be decoupled according to the bunching phase threshold, wherein the extracting comprises the following steps:
according to the clustering phase threshold, extracting a first clustering signal from a solid holdup pulsating signal to be decoupled, which is obtained by the first probe, and extracting a second clustering signal from a reference solid holdup pulsating signal, which is obtained by the second probe; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
and comparing the first cluster signal with the second cluster signal, and if the similarity degree of the first cluster signal and the second cluster signal is not less than a set value, determining the first cluster signal as an available cluster signal in the solid holdup pulsation signal to be decoupled.
2. The method of claim 1, wherein determining a bubble phase threshold and a bolus phase threshold of the solid holdup pulsation signal to be decoupled comprises:
determining the volume fraction of the bubble phase, the average solid content of the bubble phase and the average solid content of dense phase of the decoupled solid content pulsation signal according to the first-order to fourth-order statistical moments in the decoupled solid content pulsation signal;
determining a bubble phase threshold value of the solid holdup pulsation signal to be decoupled according to the bubble phase volume fraction, the bubble phase average solid holdup and the dense phase average solid holdup;
and determining the agglomeration phase threshold according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
3. The method of claim 1, after determining the bubble phase threshold and the cluster phase threshold of the solid holdup pulsation signal to be decoupled, further comprising:
determining a bubble phase fraction, a bubble phase average solid content and a bubble phase average solid content standard deviation of the solid content pulsation signal according to the bubble phase threshold;
and determining the dense phase fraction, the agglomerated phase fraction, the dense average solid content and the standard deviation of the dense average solid content of the solid content pulsation signal according to the agglomerated phase threshold.
4. A decoupling device of solid holdup ripple signals, comprising:
the threshold value determining module is used for determining a bubble phase threshold value and a clustering phase threshold value of a solid holdup pulsating signal to be decoupled, wherein the solid holdup pulsating signal to be decoupled is obtained from dense gas-solid flow by a first probe;
the bubble signal module is used for extracting an available bubble signal in the solid holdup pulsation signal to be decoupled according to the bubble phase threshold;
the clustering signal module is used for extracting an available clustering signal in the solid holdup pulsation signal to be decoupled according to the clustering phase threshold;
the first calculation module is used for determining the bubble solid holdup distribution, the bubble occurrence frequency, the bubble velocity distribution, the bubble average velocity, the bubble chord length distribution, the bubble average chord length, the cluster solid holdup distribution, the cluster average solid holdup, the cluster occurrence frequency, the cluster velocity distribution, the cluster average velocity, the cluster chord length distribution, the cluster average chord length, the cluster diameter distribution and the cluster average diameter of the solid holdup pulsation signal to be decoupled according to the available bubble signal and the available cluster signal;
the bubble signal module includes:
the reference bubble signal determining unit is used for extracting a first bubble signal from the solid holdup pulsating signal to be decoupled, which is acquired by the first probe, and extracting a second bubble signal from the reference solid holdup pulsating signal, which is acquired by the second probe, according to the bubble phase threshold; the first bubble signal is a bubble valley in the solid holdup pulsating signal to be decoupled, and the second bubble signal is a bubble valley in the reference solid holdup pulsating signal;
the first matching unit is used for comparing the first bubble signal with the second bubble signal, and if the similarity degree of the first bubble signal and the second bubble signal is not smaller than a set value, determining the first bubble signal as an available bubble signal in the solid holdup pulsation signal to be decoupled;
the spotlight signal module comprises:
the reference clustering signal determining unit is used for extracting a first clustering signal from the solid holdup pulsating signal to be decoupled, which is acquired by the first probe, and extracting a second clustering signal from the reference solid holdup pulsating signal, which is acquired by the second probe, according to the clustering phase threshold; the first agglomeration signal is a particle agglomeration peak in the solid holdup pulsation signal to be decoupled, and the second agglomeration signal is a particle agglomeration peak in the reference solid holdup pulsation signal;
and the second matching unit is used for comparing the first clustering signal with the second clustering signal, and if the similarity degree of the first clustering signal and the second clustering signal is not less than a set value, determining the first clustering signal as an available clustering signal in the solid holdup pulsation signal to be decoupled.
5. The apparatus of claim 4, wherein the threshold determination module comprises:
the parameter determining unit is used for determining the volume fraction of the bubble phase, the average solid content rate of the bubble phase and the dense-phase average solid content rate of the decoupled solid content rate pulsating signal according to the first-order to fourth-order statistical moments in the decoupled solid content rate pulsating signal;
the bubble phase threshold value determining unit is used for determining a bubble phase threshold value of the solid content pulsation signal to be decoupled according to the bubble phase volume fraction, the bubble phase average solid content and the dense phase average solid content;
and the agglomeration phase threshold value determining unit is used for determining the agglomeration phase threshold value according to the solid content rate of the dense gas-solid flow in the initial fluidization state.
6. The apparatus of claim 4, further comprising:
the second calculation unit is used for determining the bubble phase fraction, the average bubble phase solid content and the standard deviation of the average bubble solid content of the solid content pulsation signal according to the bubble phase threshold;
and the third calculating unit is used for determining the dense phase fraction, the agglomerated phase fraction, the dense average solid content rate and the standard deviation of the dense average solid content rate of the solid content rate pulsation signal according to the agglomerated phase threshold.
7. An electronic device, comprising: a memory and a processor;
the memory for storing executable instructions of the processor;
the processor is configured to perform the method of any of claims 1-3 via execution of the executable instructions.
8. A storage medium having a computer program stored thereon, comprising: the computer program, when executed by a processor, implements the method of any of claims 1-3.
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