CN114645856B - Method and system for monitoring internal blocking condition of submersible pump - Google Patents

Method and system for monitoring internal blocking condition of submersible pump Download PDF

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CN114645856B
CN114645856B CN202210559368.6A CN202210559368A CN114645856B CN 114645856 B CN114645856 B CN 114645856B CN 202210559368 A CN202210559368 A CN 202210559368A CN 114645856 B CN114645856 B CN 114645856B
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sequence
evaluation value
submersible pump
actual
blocking
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CN114645856A (en
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卢育旺
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Jiangsu Datian Valve Manufacturing Co ltd
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Jiangsu Datian Valve Manufacturing Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/22—Matching criteria, e.g. proximity measures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G06F18/20—Analysing
    • G06F18/23—Clustering techniques
    • G06F18/232—Non-hierarchical techniques
    • G06F18/2321—Non-hierarchical techniques using statistics or function optimisation, e.g. modelling of probability density functions

Abstract

The invention relates to the technical field of data processing, in particular to a method and a system for monitoring the internal blocking condition of a submersible pump, wherein the method comprises the following steps: for each submersible pump, acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence, taking the product of the flow rate range and the pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree; and acquiring the blocking degree of the submersible pump according to the group to which the final blocking evaluation value of the submersible pump to be monitored belongs. The invention can accurately monitor the blocking condition of the submersible pump.

Description

Method and system for monitoring internal blocking condition of submersible pump
Technical Field
The invention relates to the field of data processing, in particular to a method and a system for monitoring the internal blocking condition of a submersible pump.
Background
At present, no specific detection measure is provided for the internal blocking condition of the submersible pump, and the blocking condition is generally detected and processed through a pure water outlet condition, namely the water outlet efficiency is low, the water pump is pumped out, and the water pump is opened; however, the method cannot specifically detect the blocking condition of the submersible pump in real time, and reduces the working efficiency.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method and a system for monitoring the internal blocking condition of a submersible pump, and the adopted technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a method for monitoring an internal blockage condition of a submersible pump, the method including the following specific steps:
for each submersible pump, acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence, taking the product of flow rate range and pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and acquiring the blocking degree of the submersible pump according to the group to which the final blocking evaluation value of the submersible pump to be monitored belongs.
Further, the confidence of the actual extra work sequence is obtained specifically as follows:
Figure DEST_PATH_IMAGE002
Figure DEST_PATH_IMAGE004
for the purpose of the confidence level,
Figure DEST_PATH_IMAGE006
and
Figure DEST_PATH_IMAGE008
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure DEST_PATH_IMAGE010
and
Figure DEST_PATH_IMAGE012
the mean values of the actual and reference extra work sequences, respectively;
Figure DEST_PATH_IMAGE014
and
Figure DEST_PATH_IMAGE016
the standard deviation or variance of the actual and reference effleurs, respectively.
Further, the product of the flow rate range of the reference flow rate sequence and the pressure variance of the reference pressure sequence is a reference sequence characteristic value; the smaller/larger the difference between the sequence feature value and the reference sequence feature value is, the first occlusion evaluation value is
Figure DEST_PATH_IMAGE018
The larger/smaller.
Further, the second occlusion evaluation value
Figure DEST_PATH_IMAGE020
The acquisition specifically comprises the following steps:
Figure DEST_PATH_IMAGE022
Figure 901475DEST_PATH_IMAGE006
and
Figure 892434DEST_PATH_IMAGE008
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure DEST_PATH_IMAGE024
the distance between the actual extra work sequence and the reference extra work sequence is represented, and the smaller the distance, the more similar the actual extra work sequence and the reference extra work sequence.
Further, the obtaining of the final occlusion evaluation value specifically includes:
Figure DEST_PATH_IMAGE026
，
Figure DEST_PATH_IMAGE028
is the final occlusion evaluation value.
In a second aspect, another embodiment of the present invention provides a system for monitoring an internal blockage of a submersible pump, the system specifically including:
the grouping module is used for acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence for each submersible pump, taking the product of the flow rate range and the pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and the blockage monitoring module is used for acquiring the blockage degree of the submersible pump to be monitored according to the group to which the final blockage evaluation value of the submersible pump belongs.
Further, the confidence of the actual extra work sequence is obtained specifically as follows:
Figure DEST_PATH_IMAGE002A
Figure 76815DEST_PATH_IMAGE004
for the purpose of the confidence level,
Figure 686788DEST_PATH_IMAGE006
and
Figure 840558DEST_PATH_IMAGE008
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 877784DEST_PATH_IMAGE010
and
Figure 31684DEST_PATH_IMAGE012
the mean values of the actual and reference extra work sequences, respectively;
Figure 569982DEST_PATH_IMAGE014
and
Figure 188045DEST_PATH_IMAGE016
the standard deviation or variance of the actual and reference effleurs, respectively.
Further, the product of the flow rate range of the reference flow rate sequence and the pressure variance of the reference pressure sequence is a reference sequence characteristic value; the smaller/larger the difference between the sequence feature value and the reference sequence feature value is, the first occlusion evaluation value is
Figure 537118DEST_PATH_IMAGE018
The larger/smaller.
Further, the second occlusion evaluation value
Figure 506211DEST_PATH_IMAGE020
The acquisition specifically comprises the following steps:
Figure DEST_PATH_IMAGE022A
Figure 331690DEST_PATH_IMAGE006
and
Figure 460051DEST_PATH_IMAGE008
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 104659DEST_PATH_IMAGE024
the distance between the actual and reference additional function sequences is represented, the smaller the distance, the more similar the actual and reference additional function sequences are.
Further, the obtaining of the final occlusion evaluation value specifically includes:
Figure 170836DEST_PATH_IMAGE026
，
Figure 926302DEST_PATH_IMAGE028
is the final occlusion evaluation value.
The embodiment of the invention at least has the following beneficial effects: the method comprises the steps of obtaining sequence characteristic values based on flow rate range and pressure variance of an actual flow rate sequence and a submersible pump bottom pressure sequence, and calculating a first occlusion evaluation value based on the sequence characteristic values and reference sequence characteristic values; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; obtaining the blocking degree of the submersible pump by combining the first blocking evaluation value and the second blocking evaluation value; based on the two blockage evaluation values, the invention can accurately monitor the blockage condition of the submersible pump. In addition, when the blocking degree of the submersible pump is obtained by combining the first blocking evaluation value and the second blocking evaluation value, the confidence coefficient is calculated according to the actual extra power sequence, and the higher the confidence coefficient of the actual extra power sequence is, the more possible mechanical fault of the submersible pump is shown, at the moment, the blocking degree is detected mainly by the first blocking evaluation value, and the interference of the mechanical fault factor on the blocking detection result is reduced.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description is provided for the method and system for monitoring the internal blockage of a submersible pump according to the present invention, and the specific implementation manner, structure, features and effects thereof are described in detail below. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
One embodiment of the invention provides a method for monitoring the internal blockage condition of a submersible pump, which comprises the following steps:
for each submersible pump, acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence, taking the product of flow rate range and pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and acquiring the blocking degree of the submersible pump according to the group to which the final blocking evaluation value of the submersible pump to be monitored belongs.
The following steps are detailed:
step S1, for each submersible pump, acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence, wherein the product of the flow rate range and the pressure variance is a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; and grouping the plurality of submersible pumps based on the final blockage evaluation value, wherein each group corresponds to a blockage degree.
(1) Based on the preset time, acquiring a flow rate sequence of water when the submersible pump actually pumps water and a bottom pressure sequence of the submersible pump, specifically, acquiring the pumping flow rate of the submersible pump by using a flow rate meter in the embodiment; the method is characterized in that a pressure sensor is arranged at the bottom of the water pump, the pressure sensor is utilized to measure the bottom water pressure of the submersible pump, preferably, the preset duration is 1 hour, the flow rate and the pressure are obtained once per minute in the embodiment, and then the lengths of the flow rate sequence and the pressure sequence are both 60.
The product of the flow rate range of the actually obtained flow rate sequence and the pressure variance of the pressure sequence is a sequence characteristic value, the product of the flow rate range of the reference flow rate sequence and the pressure variance of the reference pressure sequence is a reference sequence characteristic value, wherein the reference flow rate sequence and the reference pressure sequence are the flow rate sequence and the pressure sequence when the submersible pump is normally unblocked; the smaller/larger the difference between the sequence feature value and the reference sequence feature value is, the first occlusion evaluation value
Figure 643591DEST_PATH_IMAGE018
The larger/smaller, specifically:
Figure DEST_PATH_IMAGE030
Figure 318155DEST_PATH_IMAGE018
the smaller the absolute value of the difference between the sequence feature value and the reference sequence feature value is for the first occlusion evaluation value,
Figure 261840DEST_PATH_IMAGE018
the larger the value is, the more the submersible pump is not blocked or the blocking degree is lighter, the larger the absolute value of the difference between the sequence characteristic value and the reference sequence characteristic value is,
Figure 696364DEST_PATH_IMAGE018
the smaller the value is, the more serious the blockage degree of the submersible pump is;
Figure DEST_PATH_IMAGE032
and
Figure DEST_PATH_IMAGE034
respectively, a sequence characteristic value and a reference sequence characteristic value.
(2) Acquiring an actual extra power sequence of the submersible pump based on a preset duration; obtaining additional work according to the total work of the submersible pump and the work of the submersible pump on water, specifically, subtracting useful work from the total work of the submersible pump to obtain the additional work, wherein the step (1) is the same as the step (1), the preset time duration is 1 hour, the additional work is obtained once per minute, and the actual additional work sequence length is 60; then for each minute, the extra work of the submersible pump in one minute is specifically: calculating the total work of the submersible pump according to the standard power of the submersible pump, namely the work of the submersible pump in one minute under the standard power is the total work of the submersible pump; according to the formula w = mgh = ρ vgh, w is work, m is mass, ρ is density, v is volume, g is gravity acceleration, and h is height, the work of the submersible pump on water in one minute can be known
Figure DEST_PATH_IMAGE036
，
Figure DEST_PATH_IMAGE038
Is the density of water pumped by the submersible pump,
Figure DEST_PATH_IMAGE040
is the one minuteCorresponding to the flow rate of the water, in the example in meters/second,
Figure DEST_PATH_IMAGE042
is the cross-sectional area of the pumping pipe of the submersible pump,
Figure DEST_PATH_IMAGE044
the gravity acceleration is adopted, t is the water pumping time, and the value of t is 60 seconds; subtracting the work of the submersible pump on water from the total work of the submersible pump
Figure DEST_PATH_IMAGE046
Extra work is provided for the submersible pump; the actual extra work sequence is obtained according to the method for obtaining the extra work of the submersible pump.
Based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence, acquiring a second blockage evaluation value, specifically:
Figure DEST_PATH_IMAGE022AA
Figure 989198DEST_PATH_IMAGE020
is a second occlusion rating value for the first occlusion,
Figure 710029DEST_PATH_IMAGE006
and
Figure 62382DEST_PATH_IMAGE008
respectively representing an actual extra power sequence and a reference extra power sequence, wherein the reference extra power sequence is the extra power sequence under the condition that the submersible pump has no mechanical fault;
Figure 35017DEST_PATH_IMAGE024
representing the distance between the actual and reference additional function sequences, the smaller the distance, the more similar the actual and reference additional function sequences,
Figure DEST_PATH_IMAGE048
as dynamic timeAnd (4) a rounding algorithm.
(3) Calculating the confidence of the actual extra work sequence, specifically:
Figure DEST_PATH_IMAGE002AA
Figure 995408DEST_PATH_IMAGE004
for the purpose of the confidence level,
Figure 746195DEST_PATH_IMAGE004
the larger the value is, the more likely the submersible pump is to have mechanical faults, such as turbine damage, and at the moment, the second blockage evaluation value obtained based on the actual extra work sequence cannot reflect the blockage situation of the submersible pump;
Figure 664472DEST_PATH_IMAGE006
and
Figure 440799DEST_PATH_IMAGE008
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 783924DEST_PATH_IMAGE010
and an average of the actual and reference additional work sequences, respectively;
Figure 846558DEST_PATH_IMAGE014
and
Figure 658656DEST_PATH_IMAGE016
the standard deviation or variance of the actual and reference effleurs, respectively.
(4) And performing weighted summation on the first occlusion evaluation value and the second occlusion evaluation value based on the confidence coefficient to obtain a final occlusion evaluation value, specifically:
Figure 487941DEST_PATH_IMAGE026
，
Figure 29781DEST_PATH_IMAGE028
for the purpose of the final occlusion evaluation value,
Figure 138682DEST_PATH_IMAGE004
the larger the value is, the more the detection of the blockage degree cannot be performed by depending on the second blockage evaluation value too much, that is, the less the second blockage evaluation value has reference value, at this time, the more the detection of the blockage degree needs to be performed by depending on the first blockage evaluation value, and the interference of the mechanical fault factor to the blockage detection result is reduced.
(5) And grouping the plurality of submersible pumps based on the final blockage evaluation value, wherein each group corresponds to a blockage degree.
Obtaining final blocking evaluation values corresponding to a plurality of submersible pumps according to the steps, wherein the blocking degrees of the submersible pumps are different; based on the final blocking evaluation value, the submersible pumps are grouped, preferably, the embodiment clusters the submersible pumps by adopting a DBSCAN clustering algorithm, a plurality of clusters/groups are obtained after clustering, and each group corresponds to one blocking degree. It should be noted that after clustering, a group of corresponding submersible pumps is characterized by a mechanical failure. For example, four groups are obtained after clustering, and the submersible pumps corresponding to the four groups are respectively characterized by high blockage, medium blockage, low blockage and mechanical failure.
And step S2, acquiring the blockage degree of the submersible pump to be monitored according to the group to which the final blockage evaluation value belongs.
And acquiring the final blockage evaluation value of the submersible pump to be monitored according to the obtained result, and determining the blockage condition of the submersible pump to be monitored according to the blockage degree corresponding to the group to which the final blockage evaluation value belongs.
Based on the same inventive concept as the above method embodiment, an embodiment of the present invention provides a system for monitoring an internal blockage condition of a submersible pump, the system comprising:
the grouping module is used for acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence for each submersible pump, taking the product of the flow rate extreme difference and the pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein, calculating the confidence of the actual extra work sequence; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and the blockage monitoring module is used for acquiring the blockage degree of the submersible pump to be monitored according to the group to which the final blockage evaluation value of the submersible pump belongs.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A method of monitoring a blockage within a submersible pump, the method comprising:
for each submersible pump, acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence, taking the product of the flow rate range and the pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein the confidence of the actual extra work sequence is calculated; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and obtaining the blocking degree of the submersible pump according to the group to which the final blocking evaluation value of the submersible pump to be monitored belongs.
2. The method of claim 1, wherein the confidence level of the actual extra work sequence is obtained by:
Figure 777828DEST_PATH_IMAGE002
Figure DEST_PATH_IMAGE003
in order to be a degree of confidence,
Figure 275062DEST_PATH_IMAGE004
and
Figure DEST_PATH_IMAGE005
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 117116DEST_PATH_IMAGE006
and
Figure DEST_PATH_IMAGE007
the mean values of the actual and reference extra work sequences, respectively;
Figure 325375DEST_PATH_IMAGE008
and
Figure DEST_PATH_IMAGE009
are respectively trueThe inter-work-additional sequence and the reference extra-work sequence have an extra-work standard deviation or an extra-work variance.
3. The method of claim 2, wherein the product of the flow rate range of the reference flow rate sequence and the pressure variance of the reference pressure sequence is a reference sequence characteristic value; the smaller/larger the difference between the sequence feature value and the reference sequence feature value is, the first occlusion evaluation value is
Figure 202064DEST_PATH_IMAGE010
The larger/smaller.
4. The method of claim 3, wherein the second occlusion evaluation value
Figure DEST_PATH_IMAGE011
The acquisition specifically comprises the following steps:
Figure DEST_PATH_IMAGE013
Figure 867269DEST_PATH_IMAGE004
and
Figure 665461DEST_PATH_IMAGE005
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 411831DEST_PATH_IMAGE014
the distance between the actual extra work sequence and the reference extra work sequence is represented, and the smaller the distance, the more similar the actual extra work sequence and the reference extra work sequence.
5. The method according to claim 4, characterized in that the final occlusion evaluation value is obtained by:
Figure DEST_PATH_IMAGE015
，
Figure 877448DEST_PATH_IMAGE016
is the final occlusion rating value.
6. A system for monitoring the internal blockage of a submersible pump, the system comprising:
the grouping module is used for acquiring an actual flow rate sequence and a submersible pump bottom pressure sequence for each submersible pump, taking the product of the flow rate range and the pressure variance as a sequence characteristic value, and calculating a first blockage evaluation value according to the sequence characteristic value and a reference sequence characteristic value; acquiring a second blockage evaluation value based on the similarity between the actual extra power sequence of the submersible pump and the reference extra power sequence; wherein, calculating the confidence of the actual extra work sequence; carrying out weighted summation on the first blocking evaluation value and the second blocking evaluation value based on the confidence coefficient to obtain a final blocking evaluation value; grouping a plurality of submersible pumps based on the final blocking evaluation value, wherein each group corresponds to a blocking degree;
and the blockage monitoring module is used for acquiring the blockage degree of the submersible pump to be monitored according to the group to which the final blockage evaluation value of the submersible pump belongs.
7. The system of claim 6, wherein the confidence level of the actual additional work sequence is obtained by:
Figure 401970DEST_PATH_IMAGE002
Figure 205234DEST_PATH_IMAGE003
for the purpose of the confidence level,
Figure 473405DEST_PATH_IMAGE004
and
Figure 527948DEST_PATH_IMAGE005
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 488951DEST_PATH_IMAGE006
and
Figure 746888DEST_PATH_IMAGE007
the mean values of the actual and reference extra work sequences, respectively;
Figure 553170DEST_PATH_IMAGE008
and
Figure 727800DEST_PATH_IMAGE009
the standard deviation or variance of the extra power of the actual extra power sequence and the reference extra power sequence, respectively.
8. The system of claim 7, wherein the product of the flow rate range of the reference flow rate sequence and the pressure variance of the reference pressure sequence is a reference sequence characteristic value; the smaller/larger the difference between the sequence feature value and the reference sequence feature value is, the first occlusion evaluation value is
Figure 859704DEST_PATH_IMAGE010
The larger/smaller.
9. The system of claim 8, wherein the second occlusion rating value
Figure 103472DEST_PATH_IMAGE011
The acquisition specifically comprises the following steps:
Figure 713445DEST_PATH_IMAGE013
Figure 742581DEST_PATH_IMAGE004
and
Figure 45386DEST_PATH_IMAGE005
respectively representing an actual extra work sequence and a reference extra work sequence;
Figure 277916DEST_PATH_IMAGE014
the distance between the actual and reference additional function sequences is represented, the smaller the distance, the more similar the actual and reference additional function sequences are.
10. The system according to claim 9, wherein the obtaining of the final occlusion evaluation value is specifically:
Figure 691579DEST_PATH_IMAGE015
，
Figure 575222DEST_PATH_IMAGE016
is the final occlusion evaluation value.
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