CN107143493A - Pump housing stuck point detecting system and its stuck point judgment means and method - Google Patents
Pump housing stuck point detecting system and its stuck point judgment means and method Download PDFInfo
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- CN107143493A CN107143493A CN201610707511.6A CN201610707511A CN107143493A CN 107143493 A CN107143493 A CN 107143493A CN 201610707511 A CN201610707511 A CN 201610707511A CN 107143493 A CN107143493 A CN 107143493A
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- kurtosis
- stuck point
- pump housing
- measurement data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The present invention provides a kind of pump housing stuck point detecting system and its stuck point judgment means and method.The stuck point judgment means, for according to the judgement that the measurement data progress pump housing stuck point that torsional test is obtained is carried out to the pump housing, the stuck point judgment means to include：Kurtosis computing module and judge module；The kurtosis computing module is used to calculate kurtosis using the measurement data；And the judge module is used to judge that the pump housing whether there is stuck point according to the kurtosis.According to the such scheme of the present invention, the stuck point for influenceing the pump housing to run smoothness is capable of detecting when, so as to avoid because whole compressor is scrapped caused by the stuck point of the pump housing.
Description
Technical field
The present invention relates to observation and control technology field, more particularly to a kind of pump housing stuck point detecting system and its stuck point judgment means and
Method.
Background technology
The pump housing is as the core component of compressor of air conditioner, and its quality directly affects the quality of compressor.Wherein, the pump housing is transported
Capable smoothness, i.e., be the content for needing in the pump housing quality testing emphasis to detect with the presence or absence of the stuck point for causing the pump housing stuck.Mesh
Before, mainly realized for the detection that the pump housing runs smoothness by judging the size of torque value, and only to torque value
Maximum and minimum value are judged.However, the defect that this detection scheme is present is can not to detect to influence the operation of the pump housing
The stuck point of smoothness.
The content of the invention
In view of this, it is an object of the invention to provide a kind of pump housing stuck point detecting system and its stuck point judgment means and side
Method, is capable of detecting when the stuck point for influenceing the pump housing to run smoothness, so as to avoid due to whole compressor caused by the stuck point of the pump housing
Scrap.
According to the first aspect of the invention there is provided a kind of stuck point judgment means, for carrying out torsion according to the pump housing
The obtained measurement data of test carries out the judgement of pump housing stuck point, and the stuck point judgment means include：Kurtosis computing module and
Judge module；The kurtosis computing module is used to calculate kurtosis using the measurement data；And the judge module is used for root
Judge that the pump housing whether there is stuck point according to the kurtosis.
Further, the judge module judges the kurtosis whether within standard figures, so as to make the pump housing
With the presence or absence of the judgement of stuck point.
Further, if the kurtosis is in standard figures, judge that stuck point is not present in the pump housing；Otherwise, then sentence
There is stuck point in the pump housing that breaks.
Further, the kurtosis computing module includes the first kurtosis computing module and splits kurtosis computing module；Institute
State the first kurtosis computing module be used for according to the pump housing carry out torsional test obtained measurement data calculating the first kurtosis；And
The fractionation kurtosis computing module is used to the measurement data being split as more than two arrays, and calculates each described respectively
The kurtosis of array, to obtain maximum kurtosis value as fractionation kurtosis；The judge module is according to first kurtosis and described
Split kurtosis and judge that the pump housing whether there is stuck point.
Further, the fractionation kurtosis computing module includes the second kurtosis computing module and the 3rd kurtosis computing module；
The measurement data is split as the array of the first quantity by the second kurtosis computing module, and calculates the kurtosis value of each data, obtains
Obtain maximum kurtosis value and be used as the second kurtosis；And the 3rd kurtosis computing module by the measurement data be split as be different from first number
The array of second quantity of amount, calculates the kurtosis value of each array in the array of second quantity, and obtains maximum kurtosis value work
For the 3rd kurtosis；Wherein, first, second quantity is more than 2 quantity；The judge module according to first kurtosis with
And second, third described kurtosis judges that the pump housing whether there is stuck point.
Further, described device also includes：Difference calculating module, for obtain in the measurement data maximum and
Minimum value, and calculate the difference of the maxima and minima；And the judge module always according to the maximum, it is described most
Small value and the difference judge whether the stuck point.
According to the second aspect of the invention there is provided a kind of stuck point determination methods, for carrying out torsion according to the pump housing
The obtained measurement data of test carries out the judgement of pump housing stuck point, and the stuck point determination methods include：Kurtosis calculation procedure, is utilized
The measurement data calculates kurtosis；And the judgment step, judge that the pump housing whether there is stuck point according to the kurtosis.
Further, in the judgment step, the kurtosis is judged whether within standard figures, so as to make the pump
Body whether there is the judgement of stuck point.
Further, if the kurtosis is in standard figures, judge that stuck point is not present in the pump housing；Otherwise, then sentence
There is stuck point in the pump housing that breaks.
Further, the kurtosis calculation procedure includes：First kurtosis calculation procedure and fractionation kurtosis calculation procedure；Institute
The first kurtosis calculation procedure is stated, the first kurtosis is calculated according to the measurement data that pump housing progress torsional test is obtained；And institute
Fractionation kurtosis calculation procedure is stated, the measurement data is split as more than two arrays, and calculates each array respectively
Kurtosis, using obtain maximum kurtosis value as split kurtosis；In the judgment step, according to first kurtosis and described tear open
Kurtosis is divided to judge that the pump housing whether there is stuck point.
Further, the fractionation kurtosis calculation procedure includes the second kurtosis calculation procedure and the 3rd kurtosis calculation procedure；
Second kurtosis calculation procedure, the measurement data is split as the array of the first quantity, and calculates the kurtosis value of each data, is obtained
Obtain maximum kurtosis value and be used as the second kurtosis；And the 3rd kurtosis calculation procedure, the measurement data is split as to be different from first
The array of second quantity of quantity, calculates the kurtosis value of each array in the array of second quantity, and obtains maximum kurtosis value
It is used as the 3rd kurtosis；Wherein, first, second quantity is more than 2 quantity；In the judgment step, according to described first
Kurtosis and second, third described kurtosis judge that the pump housing whether there is stuck point.
Further, described method also includes：Mathematic interpolation step, obtains maximum and minimum in the measurement data
Value, and calculate the difference of the maxima and minima；And in the judgment step, always according to the maximum, it is described most
Small value and the difference judge whether the stuck point.
According to the third aspect of the invention we there is provided a kind of stuck point detecting system of pump housing, including：Torque test device, is used
In measurement the pump housing torsion and export measurement data；And any one of as described above stuck point judgment means.
Further, the torque test device includes：Torsion torque sensor, the torsion for measuring the pump housing；And
Data acquisition device, judges to fill for gathering the measurement data from the torsion torque sensor, and exporting to the stuck point
Put.
According to the such scheme of the present invention, by kurtosis (many interval kurtosis), the maximum of measurement data, minimum value
And the judgement of the calculating of difference, enabling the accurate judgement to the stuck point of the pump housing is realized, so as to avoid due to the pump housing
Whole compressor is scrapped caused by stuck point.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structured flowchart of pump housing stuck point detecting system according to one preferred embodiment of the present invention.
Fig. 2 shows the structured flowchart of the stuck point judgment means according to one preferred embodiment of the present invention.
Fig. 3 shows the flow chart of the determination methods of pump housing stuck point according to one preferred embodiment of the present invention.
Fig. 4, which is shown in stuck point judgment means and method according to a preferred embodiment of the invention, measures data
The flow chart of processing.
Fig. 5 shows the stuck point judgment means for realizing preferred specific embodiment of the present invention.
Fig. 6 shows the peak value figure in pump housing torque measurement curve middle pump body stuck point.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
Illustrate to be sentenced according to pump housing stuck point detecting system of the present invention and its included stuck point with reference to Fig. 1, Fig. 2 first
Disconnected device.Fig. 1 shows the structured flowchart of pump housing stuck point detecting system according to one preferred embodiment of the present invention.Fig. 2 is shown
The structured flowchart of the stuck point judgment means according to one preferred embodiment of the present invention.
As shown in figure 1, the stuck point detecting system of the pump housing includes torque test device 1 and stuck point judgment means 2.Institute
Stating torque test device 1 includes, for example, torsion torque sensor 11, data acquisition device 12, torsion and output for measuring the pump housing
Measurement data.The torsion torque sensor 11 is used for the torsion for measuring the pump housing, and the data acquisition device 12 is, for example, data
Capture card, for gathering the data that the torsion torque sensor 11 is measured, and is exported to the stuck point judgment means 2.
The measurement data that the stuck point judgment means 2 are sent according to torque test device 1 carries out the judgement of stuck point.As schemed
Shown in 2, the stuck point judgment means 2 include kurtosis computing module K and judge module 24.The kurtosis computing module K is used for
Kurtosis is calculated according to the measurement data that pump housing progress torsional test is obtained.The judge module 24 is used for according to the kurtosis
Judge that the pump housing whether there is stuck point.Specifically, the judge module 24 judges the kurtosis whether in standard figures, from
And make the judgement that the pump housing whether there is stuck point.If the kurtosis is in standard figures, judge the card is not present
Point；Otherwise, then judge that the pump housing has stuck point.
Kurtosis is very sensitive to the impact phenomenon in signal, therefore available for existing with the presence or absence of impact in detection random signal
As.Its calculation formula is：
In formula, N is the number of measurement data, xnFor n-th of measurement data, μxFor total average value of measurement data, σx
For total standard value of measurement data.Because the stuck point of the pump housing occurs on torque value with waveform peak, and belong to mutation
Type, as shown in Figure 6.Therefore in the such scheme of the present invention, introduce the calculating of kurtosis as judge that stuck point whether there is according to
According to it is achieved thereby that the test of the stuck point to the pump housing.
In a preferred embodiment, the kurtosis computing module K includes the first kurtosis computing module 21 and splits kurtosis
Computing module 22.The first kurtosis computing module 21 to the pump housing based on according to the measurement data that torsional test is obtained is carried out
Calculate the first kurtosis.The fractionation kurtosis computing module 22 is used to the measurement data being split as more than two arrays, and divides
Not Ji Suan each array kurtosis, to obtain maximum kurtosis value as splitting kurtosis.The judge module 24 is according to described
First kurtosis and the fractionation kurtosis judge that the pump housing whether there is stuck point.Specifically, the judge module 24 judges institute
The first kurtosis and the fractionation kurtosis are stated whether in standard figures, so as to make the pump housing sentencing with the presence or absence of stuck point
It is disconnected.If first kurtosis and the fractionation kurtosis are in standard figures, judge the stuck point is not present；Otherwise, appoint
One above-mentioned numerical value judges that the pump housing has stuck point not in standard scale, then.
In the scheme of above preferred embodiment, by the way that measurement data is split as into multiple arrays, with to different interval torsions
Force value carries out algorithm process, obtains different kurtosis, it is to avoid average is tested when pump housing many places have stuck point and widens and causes
Can not determine stuck point, that is, avoid and stuck point failed to judge so that detection to the stuck point and judge more accurate.
It is further preferred that the fractionation kurtosis computing module 22 can specifically include the He of the second kurtosis computing module 221
3rd kurtosis computing module 222.The measurement data is split as the array of the first quantity by the second kurtosis computing module 221, and
The kurtosis value of each data is calculated, maximum kurtosis value is obtained and is used as the second kurtosis.3rd kurtosis computing module 222 is by the measurement
Data are split as the array of the second quantity different from the first quantity, calculate the kurtosis of each array in the array of second quantity
Value, and maximum kurtosis value is obtained as the 3rd kurtosis.First, second quantity is more than two quantity, such as the first quantity
Array be two groups of data, the array of the second quantity is three groups of arrays etc..The judge module 24 according to first kurtosis with
And second, third described kurtosis judges that the pump housing whether there is stuck point.Specifically, the judge module 24 judges described first
Whether kurtosis and second, third described kurtosis are in standard figures, so as to make the judgement that the pump housing whether there is stuck point.
If first kurtosis and second, third described kurtosis are in standard figures, judge the stuck point is not present；Otherwise,
Any above-mentioned numerical value judges that the pump housing has stuck point not in standard scale, then.
Herein, by the way that measurement data to be split as to the array of first, second quantity respectively, it further avoid when the card
Stuck point is failed to judge caused by when point is located at the border for splitting data so that test result is more accurate.Herein it should be noted that
Description above to array quantity is exemplary only, can be entered according to the demand of measurement accuracy and the size of measurement data amount
Row is set.Specifically, to avoid the element (data) in every group of array is very few from causing result of calculation inaccurate, array is split
Quantity should not be excessive, and the fractionation of the array is preferably average fractionation.
Further, the stuck point judgment means 2 also include difference calculating module 23.The difference calculating module 23 is used for
Maximum and minimum value in the measurement data are obtained, and calculates the difference of the maxima and minima.Preferably, the difference
Computing module 23 includes maximum extraction module, minimum value extraction module and subtraction block.The maximum extraction module and
Minimum value extraction module extracts maximum and minimum value from the measurement data respectively, subtraction block calculate the maximum and
The difference of minimum value.The judge module 24 judges always according to the maximum, the minimum value and the difference
With the presence or absence of the stuck point.Specifically, the judge module 24 judges first kurtosis, the maximum, the minimum value
And whether the difference and/or the fractionation kurtosis (second, third kurtosis) are in standard figures, so as to make the pump housing
With the presence or absence of the judgement of the stuck point.If first kurtosis, the maximum, the minimum value and the difference and/or
The fractionation kurtosis (second, third kurtosis) then judges that the stuck point is not present in the pump housing in standard figures；Otherwise,
Any above-mentioned numerical value judges that the pump housing has stuck point not in standard scale, then.
In this way, for one has the pump housing of impurity, stuck point is characterized present in its torque measurement curve waveform
Peak value less substantially may cause to detect that the testing result of stuck point is inaccurate by kurtosis.But for there is the pump housing of impurity
For, change in torque when it is rotated is obvious, and at this moment the fluctuation of the waveform tested out can just pass through survey than larger
The measurement of the maximum, minimum value and difference is measured more accurately to detect the point card of the pump housing.
The standard figures includes first kurtosis, the maximum, the minimum value, the difference and described torn open
Divide the higher limit of kurtosis (second, third kurtosis), the standard figures is empirical value, can pass through and test acquisition.
The stuck point determination methods of the pump housing according to the present invention are described below according to Fig. 3.Fig. 3 is shown according to the present invention
The flow chart of the determination methods of the pump housing stuck point of one preferred embodiment.
As shown in figure 3, the stuck point determination methods include：Kurtosis calculation procedure S1 and judgment step S2.The kurtosis
Calculation procedure S1, kurtosis is calculated according to the measurement data that pump housing progress torsional test is obtained；And the judgment step S2,
Judge that the pump housing whether there is stuck point according to the kurtosis.Specifically, the kurtosis is judged whether in standard figures, so that
Make the judgement that the pump housing whether there is stuck point.If the kurtosis is in standard figures, judge the stuck point is not present；
Otherwise, then judge that the pump housing has stuck point.The calculating of kurtosis, as described above, is obtained using formula (1).
In a preferred embodiment, the kurtosis calculation procedure S1 includes the first kurtosis calculation procedure S11 and split high and steep
Spend calculation procedure S12.The first kurtosis calculation procedure S11, according to the measurement data obtained to pump housing progress torsional test
Calculate the first kurtosis.The fractionation kurtosis calculation procedure S12, is split as more than two arrays, and divide by the measurement data
Not Ji Suan each array kurtosis, to obtain maximum kurtosis value as splitting kurtosis.The judgment step S2, according to described
First kurtosis and the fractionation kurtosis judge that the pump housing whether there is stuck point.Specifically, judge first kurtosis and
Whether the fractionation kurtosis is in standard figures, so as to make the judgement that the pump housing whether there is stuck point.If described first is high and steep
Degree and the fractionation kurtosis judge the stuck point is not present in standard figures, then；Otherwise, any above-mentioned numerical value is not in mark
In quasi- number range, then judge that the pump housing has stuck point.
It is further preferred that the fractionation kurtosis calculation procedure S12 can specifically include the second kurtosis calculation procedure and
Three kurtosis calculation procedures.The measurement data is split as the array of the first quantity by the second kurtosis calculation procedure, and calculates each
The kurtosis value of data, obtains maximum kurtosis value and is used as the second kurtosis.The measurement data is split as by the 3rd kurtosis calculation procedure
Different from the array of the second quantity of the first quantity, the kurtosis value of each array in the array of second quantity is calculated, and is obtained
Maximum kurtosis value is used as the 3rd kurtosis.First, second quantity is more than two quantity, and such as array of the first quantity is two
Group data, the array of the second quantity is three groups of arrays etc..The judgment step S2, according to first kurtosis and described
2nd, the 3rd kurtosis judges that the pump housing whether there is stuck point.Specifically, judge first kurtosis and it is described second, third
Whether kurtosis is in standard figures, so as to make the judgement that the pump housing whether there is stuck point.If first kurtosis and institute
Second, third kurtosis is stated in standard figures, then judges the stuck point is not present；Otherwise, any above-mentioned numerical value is not in standard
In number range, then judge that the pump housing has stuck point.
And further, the stuck point determination methods also include mathematic interpolation step S3.The mathematic interpolation step S3,
Greatest measurement and minimum measured value in the measurement data are obtained, and calculates the difference of the maxima and minima.It is described to sentence
Disconnected module 24 judges whether the stuck point always according to the maximum, the minimum value and the difference.Specifically,
Judge first kurtosis, the maximum, the minimum value and the difference and/or fractionation kurtosis (second, third
Kurtosis) whether in standard figures, so as to make the judgement that the pump housing whether there is the stuck point.If first kurtosis,
The maximum, the minimum value and the difference and/or the fractionation kurtosis (second, third kurtosis) are in standard figures
It is interior, then judge that the stuck point is not present in the pump housing；Otherwise, any above-mentioned numerical value judges institute not in standard scale, then
State the pump housing and there is stuck point.
A preferred specific implementation according to stuck point judgment means of the present invention and method is described below in conjunction with Fig. 4,5
Example.Fig. 4, which is shown in stuck point judgment means and method according to a preferred embodiment of the invention, measures data processing
Flow chart.Fig. 5 shows the stuck point judgment means for realizing preferred specific embodiment of the present invention.
The pump housing stuck point detecting system as shown in Figure 1 starts the torsional test of the pump housing, the torque test device 1
Torsion torque sensor 11 measures the torsion of the pump housing, and the data acquisition device 12 such as data collecting card collection obtains the measurement number
According to.Stuck point judgment means 2 utilize the first kurtosis computing module 21 shown in Fig. 5, the second kurtosis meter according to the flow described in Fig. 4
Calculate module 221, the 3rd kurtosis computing module 222, difference calculating module 23 to handle measurement data, including calculate acquisition institute
State the first kurtosis, second kurtosis, maximum, the minimum value and the difference described in the 3rd kurtosis.Judge module 24
By maximum, the minimum value and the difference described in first kurtosis, second kurtosis, the 3rd kurtosis in criterion numeral
Whether value is compared, judge it within the standard figures.If above-mentioned each value is in criterion of acceptability, qualified letter is exported
Number；If having one not in criterion of acceptability, unqualified signal is exported.
The pump housing stuck point detecting system and its stuck point judgment means and method to the present invention are described above.Root
According to the such scheme of the present invention, by kurtosis (many interval kurtosis), the maximum of measurement data, minimum value and difference
The judgement of calculating, enabling the accurate judgement to the stuck point of the pump housing is realized, so as to avoid due to caused by the stuck point of the pump housing
Whole compressor is scrapped.
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, according to
Any simple modification, equivalent variations and the modification made according to the technical spirit of the present invention to above example, still fall within this hair
In the range of bright technical scheme.
Claims (14)
1. a kind of stuck point judgment means, for carrying out the pump housing according to the measurement data that pump housing progress torsional test is obtained
The judgement of stuck point, it is characterised in that the stuck point judgment means include：
Kurtosis computing module and judge module；
The kurtosis computing module is used to calculate kurtosis using the measurement data；And
The judge module is used to judge that the pump housing whether there is stuck point according to the kurtosis.
2. device as claimed in claim 1, it is characterised in that
The judge module judges the kurtosis whether within standard figures, so as to make the pump housing with the presence or absence of stuck point
Judge.
3. device as claimed in claim 2, it is characterised in that
If the kurtosis is in standard figures, judge that stuck point is not present in the pump housing；Otherwise, then judge that the pump housing is present
Stuck point.
4. the device as described in claim any one of 1-3, it is characterised in that
The kurtosis computing module includes the first kurtosis computing module and splits kurtosis computing module；
The first kurtosis computing module is used to calculate the first kurtosis using the measurement data；And
The fractionation kurtosis computing module is used to the measurement data being split as more than two arrays, and is utilized respectively each
Data in the array calculate kurtosis, to obtain maximum kurtosis value as fractionation kurtosis；
The judge module judges that the pump housing whether there is stuck point according to first kurtosis and the fractionation kurtosis.
5. device as claimed in claim 4, it is characterised in that
The fractionation kurtosis computing module includes the second kurtosis computing module and the 3rd kurtosis computing module；
The measurement data is split as the array of the first quantity by the second kurtosis computing module, and is utilized respectively first quantity
Each array calculates kurtosis in array, regard maximum kurtosis value therein as the second kurtosis；And
The measurement data is split as the array of the second quantity different from the first quantity by the 3rd kurtosis computing module, respectively profit
Kurtosis is calculated with each array in the array of second quantity, maximum kurtosis value therein is regard as the 3rd kurtosis；Wherein, institute
State the quantity that first, second quantity is more than 2；
The judge module judges the pump housing with the presence or absence of card according to first kurtosis and second, third described kurtosis
Point.
6. the device as described in claim any one of 1-5, it is characterised in that also include：
Difference calculating module, for obtaining maximum and minimum value in the measurement data, and calculates the maximum and minimum
The difference of value；And
The judge module judges whether the card always according to the maximum, the minimum value and the difference
Point.
7. a kind of stuck point determination methods, for carrying out the pump housing according to the measurement data that pump housing progress torsional test is obtained
The judgement of stuck point, it is characterised in that the stuck point determination methods include：
Kurtosis calculation procedure, kurtosis is calculated using the measurement data；And
The judgment step, judges that the pump housing whether there is stuck point according to the kurtosis.
8. method as claimed in claim 7, it is characterised in that
In the judgment step, the kurtosis is judged whether within standard figures, so as to make the pump housing with the presence or absence of card
The judgement of point.
9. method as claimed in claim 8, it is characterised in that
If the kurtosis is in standard figures, judge that stuck point is not present in the pump housing；Otherwise, then judge that the pump housing is present
Stuck point.
10. the method as described in claim any one of 7-9, it is characterised in that
The kurtosis calculation procedure includes：First kurtosis calculation procedure and fractionation kurtosis calculation procedure；
The first kurtosis calculation procedure, the first kurtosis is calculated according to the measurement data that pump housing progress torsional test is obtained；
And
The fractionation kurtosis calculation procedure, is split as more than two arrays, and calculate each institute respectively by the measurement data
The kurtosis of array is stated, to obtain maximum kurtosis value as fractionation kurtosis；
In the judgment step, judge that the pump housing whether there is stuck point according to first kurtosis and the fractionation kurtosis.
11. method as claimed in claim 10, it is characterised in that
The fractionation kurtosis calculation procedure includes the second kurtosis calculation procedure and the 3rd kurtosis calculation procedure；
Second kurtosis calculation procedure, the measurement data is split as the array of the first quantity, and is utilized respectively first quantity
Array in each array calculate kurtosis, obtain maximum kurtosis value and be used as the second kurtosis；And
3rd kurtosis calculation procedure, the measurement data is split as the array of the second quantity different from the first quantity, respectively
Kurtosis is calculated using each array in the array of second quantity, and obtains maximum kurtosis value as the 3rd kurtosis；Wherein, institute
State the quantity that first, second quantity is more than 2；
In the judgment step, judge that the pump housing whether there is according to first kurtosis and second, third described kurtosis
Stuck point.
12. the method as described in claim any one of 7-11, it is characterised in that also include：
Mathematic interpolation step, obtains maximum and minimum value in the measurement data, and calculate the maxima and minima
Difference；And
In the judgment step, judged whether always according to the maximum, the minimum value and the difference described
Stuck point.
13. a kind of stuck point detecting system of pump housing, it is characterised in that including：
Torque test device, for measuring the torsion of the pump housing and exporting measurement data；And
The stuck point judgment means as described in claim any one of 1-6.
14. system as claimed in claim 13, it is characterised in that
The torque test device includes：
Torsion torque sensor, the torsion for measuring the pump housing；And
Data acquisition device, sentences for gathering the measurement data from the torsion torque sensor, and exporting to the stuck point
Disconnected device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610707511.6A CN107143493B (en) | 2016-08-23 | 2016-08-23 | Pump housing stuck point detection system and its stuck point judgment means and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707511.6A CN107143493B (en) | 2016-08-23 | 2016-08-23 | Pump housing stuck point detection system and its stuck point judgment means and method |
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