CN108254271A - A kind of fatigue test measuring method - Google Patents
A kind of fatigue test measuring method Download PDFInfo
- Publication number
- CN108254271A CN108254271A CN201611235113.5A CN201611235113A CN108254271A CN 108254271 A CN108254271 A CN 108254271A CN 201611235113 A CN201611235113 A CN 201611235113A CN 108254271 A CN108254271 A CN 108254271A
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- data
- acruracy survey
- low precision
- measuring method
- measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
Abstract
The present invention relates to a kind of fatigue test measuring methods.This method includes alternateing the high-acruracy survey repeated and low precision measure, and the obtained data of high-acruracy survey are stored in database, and the data dynamic memory of low precision measure is in caching.The sample frequency of high-acruracy survey is higher than the sample frequency of low precision measure.When carrying out high-acruracy survey, it is mechanical periodicity pressure to the power that test specimen applies, constantly the parameter of test specimen test point is measured, the data storage of measurement is in the database.When carrying out low precision measure, it is mechanical periodicity pressure to the power that test specimen applies, constantly the parameter of test specimen test point is measured, the data of measurement are deposited in the buffer by the method that Dynamic stack stores.In the high-precision measurement data deposit database of the present invention, the measurement data of low precision needs the data volume being stored in be reduced merely through caching in measurement process, and cost is reduced, and is not required to interrupt and measure, and ensure that the validity of measurement data.
Description
Technical field
The present invention relates to pipeline testing fatigue technology more particularly to a kind of fatigue test measuring methods.
Background technology
General pipeline hydraulic performance test is required for carrying out testing fatigue, especially applies under relatively harsh environments
Pipeline is even more so.Usual testing fatigue is to apply wave period power or pulse period power to pipeline, since fatigue process is delayed
Slowly, so needing to carry out prolonged testing fatigue, to determine the creep process of test test specimen.But this measuring method has sea
The measurement data of amount generates, and most of data are close data, and it is high that these data are stored cost.In order to reduce
Data volume and so that measurement data is representative and break-up value, needs a kind of method for reducing data volume and uninterruptedly measuring.
Invention content
The defects of it is an object of the invention to overcome the prior art, and a kind of fatigue test measuring method is provided,
To achieve the above object, the present invention uses following technical scheme：
A kind of fatigue test measuring method, including alternateing the high-acruracy survey repeated and low precision measure,
The obtained data of high-acruracy survey are stored in database, and the data dynamic memory of low precision measure is in caching, high-precision
The sample frequency of measurement is higher than the sample frequency of low precision measure.
Further, it is mechanical periodicity pressure to the power that test specimen applies, and constantly to test specimen when carrying out high-acruracy survey
The parameter of test point measures, and the data storage of measurement is in the database.
Further, when carrying out high-acruracy survey, the pendulous frequency of the parameter of test specimen test point is no less than 1000 times.
Further, when carrying out high-acruracy survey, what is applied is not less than to the measurement interval of the parameter of test specimen test point
1.25 periods of mechanical periodicity pressure.
Further, it is mechanical periodicity pressure to the power that test specimen applies, and constantly to test specimen when carrying out low precision measure
The parameter of test point measures, and the data of measurement are deposited in the buffer by the method that Dynamic stack stores.
Further, at least deposit is no less than the measurement data of 1000 second period in storehouse.
Further, storage method used is the Dynamic stack storage method of first in first out when carrying out low precision measure.
Further, it when carrying out low precision measure, if the front and rear variable quantity of the measurement data of test specimen has been more than threshold value, adjusts
Verification is measured to measurement data with stacked data recovering and analysis or progress high-acruracy survey.
Further, after carrying out low precision measure, if the front and rear variable quantity for the measurement data of test specimen do not occur is more than
The situation of threshold value then directly carries out high-acruracy survey and verification is measured to measurement data.
Further, it is measured as high-acruracy survey when fatigue test starts.
Compared with the prior art, the invention has the advantages that：
The process of measurement is divided into high-precision and low two periods of precision by the present invention, and two periods mutually hand over
It replaces, in high-precision measurement data deposit database, the measurement data of low precision is needed merely through caching in measurement process
The data volume to be stored in is reduced, and cost is reduced, and is not required to interrupt and be measured, and ensure that the validity of measurement data.
Specific embodiment
In order to more fully understand the technology contents of the present invention, technical scheme of the present invention is made with reference to specific embodiment
It is further described and illustrates.
The fatigue test measuring method of the embodiment of the present invention includes alternateing the high-acruracy survey repeated and low essence
Degree measures.The obtained data of high-acruracy survey are stored in database, and the data dynamic memory of low precision measure is in caching.
And the sample frequency of high-acruracy survey is higher than the sample frequency of low precision measure.High-acruracy survey is repeatedly changed using high density
The measuring method in generation obtains the precise information that sample dimensions measure, law of dimension accurately can be described.And low essence
It is then the data that direct one-shot measurement sample dimensions are obtained in the presence of cycle pressure that degree, which measures, is obtained relatively
The measurement data of low precision, available for monitoring the process of the slow deformation of test specimen.
High-acruracy survey is measured as when fatigue test starts, is followed by low precision measure, then according still further to high-precision
It measures, low precision measure is so circulation is gone down until off-test.High-acruracy survey duration and low precision measure duration are not
Fixed always, at initial stage on-test, test specimen deformation quantity is small and slow, therefore can set high-acruracy survey duration short by one
A little while low precision measure duration setting is longer；With the continuous progress of experiment, test specimen deformation quantity can gradually increase, to experiment
When waning to the close, test specimen deformation quantity is big and changes soon, therefore with the progress of experiment, high-acruracy survey duration should gradually increase
Add, and low precision measure duration should be gradually reduced.
It is mechanical periodicity pressure to the power that test specimen applies, and constantly to test specimen test point when carrying out high-acruracy survey
Parameter measures, and the data storage of measurement is in the database.Mechanical periodicity pressure can be pulse, sinusoidal wave pressure or
Person's sawtooth wave pressure.When carrying out high-acruracy survey, the pendulous frequency of the parameter of test specimen test point is no less than 1000 times.It carries out high
During precision measure, 1.25 week of applied mechanical periodicity pressure is not less than to the measurement interval of the parameter of test specimen test point
Phase.The sample frequency of high-acruracy survey is higher than the sample frequency of low precision measure, during can directly improving high-acruracy survey
Closeness is sampled to realize, can also realize that relative sample frequency carries by reducing pressure harmonic frequency (extending the period)
It rises.The sample frequency of high-acruracy survey is higher, can more accurately obtain the corresponding pass between test specimen strain and pressure excitation
System.
It is mechanical periodicity pressure to the power that test specimen applies, and constantly to test specimen test point when carrying out low precision measure
Parameter measures.Mechanical periodicity pressure can be pulse, sinusoidal wave pressure or sawtooth wave pressure.The data of measurement are led to
The method for crossing Dynamic stack storage is deposited in the buffer.At least deposit is no less than the measurement data of 1000 second period in storehouse.Tool
Body, in the present embodiment, storage method used is the Dynamic stack storage method of first in first out when carrying out low precision measure.
When carrying out low precision measure, if the front and rear variable quantity of the measurement data of test specimen has been more than threshold value, allocating stack number
Verification is measured to measurement data according to recovering and analysis or progress high-acruracy survey.Threshold value is that measured data values are changed
A measurement, threshold value is empirically determined generally according to testing crew.During more than nominal threshold value, just think that test specimen is likely to occur
Unexpected situation, it may be possible to which the quality of test specimen is unqualified, it is necessary to recovering and analysis one by one be carried out to the deflection of test specimen, find out original
Cause.In the event of unexpected situation during low precision measure, measured data values at this time can extra storage in the database, store it
Time of origin, measured data values and analysis result etc..
After carrying out low precision measure, if the front and rear variable quantity for the measurement data of test specimen do not occur is more than the feelings of threshold value
Condition then directly carries out high-acruracy survey and verification is measured to measurement data.Low essence is carried out again after high-acruracy survey is carried out
Degree measures, and so moves in circles until off-test.
It is set forth above only with embodiment come the technology contents that further illustrate the present invention, in order to which reader is easier to understand,
But embodiments of the present invention are not represented and are only limitted to this, any technology done according to the present invention extends or recreation, is sent out by this
Bright protection.
Claims (10)
1. a kind of fatigue test measuring method, which is characterized in that the measuring method include alternate repeat it is high-precision
Degree measures and low precision measure, the obtained data of high-acruracy survey are stored in database, the low precision measure
For data dynamic memory in caching, the sample frequency of the high-acruracy survey is higher than the sample frequency of low precision measure.
2. fatigue test measuring method as described in claim 1, which is characterized in that when carrying out the high-acruracy survey, to examination
The power that part applies is mechanical periodicity pressure, and constantly the parameter of test specimen test point is measured, and the data of measurement are stored in
In database.
3. fatigue test measuring method as claimed in claim 2, which is characterized in that when carrying out the high-acruracy survey, to examination
The pendulous frequency of the parameter of part test point is no less than 1000 times.
4. fatigue test measuring method as claimed in claim 2, which is characterized in that when carrying out the high-acruracy survey, to examination
The measurement interval of the parameter of part test point is not less than 1.25 periods of applied mechanical periodicity pressure.
5. fatigue test measuring method as described in claim 1, which is characterized in that when carrying out the low precision measure, to examination
The power that part applies is mechanical periodicity pressure, and constantly the parameter of test specimen test point is measured, and the data of measurement, which pass through, to be moved
The method of state storehouse storage is deposited in the buffer.
6. fatigue test measuring method as claimed in claim 5, which is characterized in that at least deposit is no less than 1000 seconds in storehouse
The measurement data of period.
7. fatigue test measuring method as claimed in claim 5, which is characterized in that used when carrying out the low precision measure to deposit
Method for storing is the Dynamic stack storage method of first in first out.
8. fatigue test measuring method as claimed in claim 5, which is characterized in that when carrying out the low precision measure, if examination
The front and rear variable quantity of the measurement data of part has been more than threshold value, then allocating stack data review andanalysis or progress high-acruracy survey
Verification is measured to measurement data.
9. fatigue test measuring method as claimed in claim 5, which is characterized in that after carrying out the low precision measure, if
The front and rear variable quantity for the measurement data of test specimen do not occur is more than the situation of threshold value, then directly carries out high-acruracy survey to measuring number
It is checked according to measuring.
10. fatigue test measuring method as described in claim 1, which is characterized in that be measured as when fatigue test starts
High-acruracy survey.
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| CN201611235113.5A CN108254271B (en) | 2016-12-28 | 2016-12-28 | Fatigue test measuring method |
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| CN201611235113.5A CN108254271B (en) | 2016-12-28 | 2016-12-28 | Fatigue test measuring method |
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| CN108254271A true CN108254271A (en) | 2018-07-06 |
| CN108254271B CN108254271B (en) | 2020-10-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108352A (en) * | 2019-05-10 | 2019-08-09 | 上海岚盒信息技术有限公司 | Vibrate logging and its low-power consumption measurement method, computer readable storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108352A (en) * | 2019-05-10 | 2019-08-09 | 上海岚盒信息技术有限公司 | Vibrate logging and its low-power consumption measurement method, computer readable storage medium |
| CN110108352B (en) * | 2019-05-10 | 2021-12-14 | 上海岚盒信息技术有限公司 | Vibration polling instrument, low-power consumption measuring method thereof and computer readable storage medium |
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| Publication number | Publication date |
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| CN108254271B (en) | 2020-10-30 |
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