CN107153002A - Wind power generation stepped connector aeration level detection method and detection means - Google Patents
Wind power generation stepped connector aeration level detection method and detection means Download PDFInfo
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- CN107153002A CN107153002A CN201710346232.6A CN201710346232A CN107153002A CN 107153002 A CN107153002 A CN 107153002A CN 201710346232 A CN201710346232 A CN 201710346232A CN 107153002 A CN107153002 A CN 107153002A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
Disclose a kind of wind power generation stepped connector aeration level detection method and detection means, by respectively setting a sensor in the both sides of wind power generation stepped connector, the vibration data of wind power generation stepped the first wind speed interval after each typhoon is arrived at is obtained respectively, the vibration data of second wind speed interval, and the 3rd wind speed interval vibration data；Then three groups of vibration datas of acquisition are contrasted with wind power generation stepped wind speed at operation initial stage in the reference vibration data of first interval respectively, and then judges the aeration level of wind power generation stepped connector after each typhoon.Hereby it is achieved that automatic detection and the identification of wind power generation stepped connector aeration level, improve the maintenance efficiency that wind power generation stepped connector loosens damage, the generation of wind power generation stepped collapse accident is reduced, with important meaning of preventing and reducing natural disasters.
Description
Technical field
The present invention relates to structure detection technical field, and in particular to a kind of wind power generation stepped connector aeration level detection side
Method and detection means.
Background technology
Wind power generation stepped housing structure is usually to be made up of more piece tower, wherein often the two ends of section tower are also set respectively
Have and be fastenedly connected between ring flange, adjacent tower by ring flange and bolt.Bolt looseness is wind power generation stepped common knot
Structure is damaged, and particularly under typhoon effect, bolt bears larger tension, and bolt is gradually attenuated in the presence of tension
And cause nut gradually to loosen or bolt fracture, if found not in time, tower collapse accident occurs.Inspection at present both at home and abroad
The common method for surveying wind power generation stepped ring flange fastening bolt aeration level is artificial regular visit, periodic maintenance, though the method
It is so reliable, but be due to every wind power generation stepped up to more than 700 bolt, therefore there is detection cycle mistake in artificial periodic maintenance
It is long, loosen damage find not in time, the excessively high defect of testing cost.
The content of the invention
In view of this, the invention provides a kind of wind power generation stepped connector aeration level detection method and detection means,
Automatic detection and the identification of wind power generation stepped connector aeration level can be realized, the hair of wind power generation stepped collapse accident is reduced
It is raw, with important meaning of preventing and reducing natural disasters.
There is provided a kind of wind power generation stepped connector aeration level detection method, methods described for the first aspect of the present invention
Including：
The reference vibration data of the connector is obtained, and extracts the corresponding time-frequency characteristics of the reference vibration data, institute
State protrusion frequency values of the time-frequency characteristics including vibration signal auto-power spectrum, the maximum amplitude of vibration signal time-history curves and envelope bent
Line, the reference vibration data is vibration data of the wind power generation stepped wind speed at operation initial stage in first interval；
First vibration data of the connector under the first operating mode, the second vibration number under the second operating mode are obtained respectively
According to the 3rd vibration data under the 3rd operating mode, wherein, the first operating mode, the second operating mode and the 3rd operating mode correspond respectively to first
Wind speed interval, the second wind speed interval and the 3rd wind speed interval；
The first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data are extracted respectively；
According to first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data and the ginseng
The time-frequency characteristics for examining vibration data detect the aeration level of wind power generation stepped connector.
Preferably, the vibration data is obtained by being arranged at the sensor of wind power generation stepped connector both sides.
Preferably, the sensor is force-balance accelerometer.
Preferably, the sensor is towards cardinal wind.
Preferably, the reference vibration data is the more than hour wind power generation stepped instantaneous wind at operation initial stage of continuous acquisition 5
The fast vibration data during 10~20m/s.
Preferably, then the time-frequency characteristics are carried out from power again by carrying out high-pass filtering to corresponding vibration data
Spectrum information.
Preferably, first wind speed interval is to the wind speed interval for decaying to instantaneous wind speed 30m/s, institute after typhoon is arrived at
State the second wind speed interval and decay to wind speed interval of the instantaneous wind speed less than 20m/s and more than 10m/s, the 3rd wind speed for typhoon
Interval decays to wind speed interval of the instantaneous wind speed less than 10m/s and more than 5m/s for typhoon.
Preferably, according to first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data
Detect that the aeration level of wind power generation stepped connector includes with the time-frequency characteristics of the reference vibration data：
When the time-frequency characteristics of the first vibration data, the second vibration data and the 3rd vibration data are satisfied by predetermined condition,
The connector is pointed out to be loosened for three-level；
When the time-frequency characteristics of only the first vibration data and the second vibration data are satisfied by predetermined condition, the company is pointed out
Fitting is two grades of loosenings；
When the time-frequency characteristics of only the first vibration data are satisfied by predetermined condition, it is one-level pine to point out the connector
It is dynamic；
When the time-frequency characteristics of the first vibration data do not meet predetermined condition simultaneously, shown connector is pointed out not occur pine
It is dynamic；
Wherein, the predetermined condition is different from reference to prominent frequency values for the protrusion frequency values of auto-power spectrum, maximum amplitude
The difference of reference maximum amplitude more than 10 times, the adjacent crest of envelope curve and trough is more than 10 times of reference envelope curve phase
Adjacent crest and the difference of trough.
Preferably, the aeration level that the one-level loosens, two grades of loosenings, three-levels loosen is in increasing trend.
Second aspect includes there is provided a kind of wind power generation stepped connector aeration level detection means, the detection means：
Sensor, is arranged at the both sides of the wind power generation stepped connector, for detecting vibration data；
Data processing equipment, is configured as performing the process described above.
The invention provides a kind of wind power generation stepped connector aeration level detection method and detection means, by wind-force
The both sides of power generation column connector respectively set a sensor, and wind power generation stepped the first wind after each typhoon is arrived at is obtained respectively
The vibration data of fast interval vibration data, the vibration data of the second wind speed interval, and the 3rd wind speed interval；Then it will obtain
Three groups of vibration datas contrasted respectively with wind power generation stepped wind speed at operation initial stage in the reference vibration data of first interval, enter
And judge the aeration level of wind power generation stepped connector after each typhoon.Hereby it is achieved that wind power generation stepped connector loosens
The automatic detection of degree and identification, improve the maintenance efficiency that wind power generation stepped connector loosens damage, reduce wind power generation stepped
The generation of collapse accident, with important meaning of preventing and reducing natural disasters.
Brief description of the drawings
By description referring to the drawings to the embodiment of the present invention, above-mentioned and other purpose of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 is the structural representation of the wind power generation stepped connector aeration level detection means of the embodiment of the present invention；
Fig. 2 is the flow chart of the wind power generation stepped connector aeration level detection method of the embodiment of the present invention；
Fig. 3 is the step S400 of embodiment of the present invention flow chart.
Embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in the detailed description of the present invention.Do not have for a person skilled in the art
The description of these detail sections can also understand the present invention completely.
In addition, it should be understood by one skilled in the art that accompanying drawing is provided to illustration purpose provided herein, and it is attached
What figure was not necessarily drawn to scale.
Unless the context clearly requires otherwise, otherwise entire disclosure is similar with the " comprising " in claims, "comprising" etc.
Word should be construed to the implication included rather than exclusive or exhaustive implication；That is, being containing for " including but is not limited to "
Justice.
In the description of the invention, it is to be understood that term " first ", " second " etc. be only used for describe purpose, without
It is understood that to indicate or imply relative importance.In addition, in the description of the invention, unless otherwise indicated, the implication of " multiple "
It is two or more.
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
The embodiment of the present embodiment is as depicted in figs. 1 and 2.Wherein, Fig. 1 is the wind-power electricity generation of the embodiment of the present invention
The structural representation of tower connector aeration level detection means；Fig. 2 is that the wind power generation stepped connector of the embodiment of the present invention loosens
The flow chart of degree detecting method.According to Fig. 1, wind power generation stepped connector aeration level detection means includes sensor 1
With data processing equipment 2, sensor 1 is used to detecting and obtaining the wind power generation stepped vibration data in different wind speed intervals.Tool
Body, sensor 1 can be arranged at the both sides of wind power generation stepped connector, can be accurately detected connector loosening forward and backward
Vibration signal.Meanwhile, setting can be fixed towards the direction of cardinal wind in sensor 1, can obtain each typhoon and arrive at
The vibration data of maximum effect that wind power generation stepped connector is subject to afterwards, i.e. maximum magnitude, can more accurately learn connection
The local vibration signal of part.Wherein, cardinal wind refers to the scope of the maximum wind angle of wind frequency.Wind direction angular region is general continuous
45 degree or so, for the wind direction represented with 16 azimuths, cardinal wind generally refers to the scope of continuous 2-3 wind angle.Sensing
Device 1 can be selected as frequency band range >=0~100Hz force-balance accelerometer, such as China Seismological Bureau Engineering Mechanical Institute
QZ2013 type force-balance accelerometers, force-balance accelerometer has frequency response fast, and dynamic range is big, small volume,
Low in energy consumption, easy to use the advantages of.
Data processing equipment 2 is arranged at data processing centre, data processing equipment 2 and sensor 1 by wireless connection or
The vibration data detected is sent to data processing by wireless signal or wire signal and filled by person's wired connection, sensor 1
Put in 2.The vibration data that data processing equipment 2 is used to gather sensor 1 according to predetermined method is handled with the company of detection
The aeration level of fitting.Wherein, preordering method is the vibration characteristics parameter and its actual value that sensitivity is loosened according to connector
What extracting method was set.Sensitive vibration characteristics parameter includes some frequency domain characteristic parameters, some time domain specification parameters.Its is right
Sensitive vibration characteristics value of consult volume is extracted in the selection answered based on frequency-domain transform and time domain transform method.Specifically, data processing is filled
Put 2 and the vibration data received is first subjected to high-pass filtering, the low frequency signal that will be less than critical value is obstructed and weakened, then
Maximum amplitude and envelope curve that prominent frequency values and vibration signal time-history curves are extracted in auto-power spectrum analysis are carried out again.Its
In, power spectrum is one of main contents of Digital Signal Processing, the change of main research unit's inband signal power with frequency
Situation, it is therefore an objective to extract the useful signal being submerged in noise in frequency domain according to finite data.Time-history curves are that time domain becomes
Change curve, including displacement time-history curves, acceleration-time curve, speed time-history curves etc., refer specifically to a certain particle anaplasia at any time
The response curve of change.
The aeration level detection method of the wind power generation stepped connector of the present embodiment is as shown in Fig. 2 methods described includes：
Step S100, the reference vibration data for obtaining the connector, and extract the reference vibration data it is corresponding when
Frequency feature, the protrusion frequency values of time-frequency characteristics including vibration signal auto-power spectrum, vibration signal time-history curves most significantly
Value and envelope curve, the reference vibration data are vibration data of the wind power generation stepped wind speed at operation initial stage in first interval.
The reference vibration data refer to the more than hour wind power generation stepped instantaneous wind speed at operation initial stage of continuous acquisition 5 between
Wind power generation stepped vibration data during 10~20m/s.Due to being place in the connection at wind power generation stepped operation initial stage, connector
In tightening state, therefore the vibration data obtained during this period can be as referring to vibration data.Data processing equipment 2 is received
After vibration data, high-pass filtering will be carried out with reference to vibration data, the low frequency signal that will be less than critical value is obstructed and subtracted
It is weak, auto-power spectrum analysis is then carried out again extracts with reference to the reference maximum amplitude for protruding frequency values and vibration signal time-history curves
With reference envelope curve.
Step S200, first vibration data of the connector under the first operating mode is obtained respectively, under the second operating mode
Second vibration data and the 3rd vibration data under the 3rd operating mode, wherein, the first operating mode, the second operating mode and the 3rd operating mode difference
Corresponding to the first wind speed interval, the second wind speed interval and the 3rd wind speed interval.
Wind speed interval selection can clearly much wind-force effect under measured by wind power generation stepped vibration data, more
Be conducive to analyzing the aeration level of connector.Specifically wind speed interval is：First wind speed interval refers to that each typhoon is arrived after arriving at
Decay to the wind speed interval that instantaneous wind speed is 30m/s；Second wind speed interval refers to that each typhoon decays to instantaneous wind speed and is less than
20m/s and the wind speed interval more than 10m/s；3rd wind speed interval refer to each typhoon decay to instantaneous wind speed less than 10m/s and
Wind speed interval more than 5m/s.
Step S300, to extract the first vibration data, the second vibration data and the corresponding time-frequency of the 3rd vibration data respectively special
Levy.
The extraction process of time-frequency characteristics includes：
(1) the corresponding time-frequency characteristics of the first vibration data are extracted, sensor 1 detects the first vibration of the first wind speed interval
After data, the first vibration data is transferred in data processing equipment 2 by wireless signal or wire signal, data processing dress
Put 2 and the first vibration data received be subjected to high-pass filtering, then carry out again auto-power spectrum analysis extract prominent frequency values with
And the maximum amplitude and envelope curve of vibration signal time-history curves.
(2) the corresponding time-frequency characteristics of the second vibration data are extracted, sensor 1 detects the second vibration of the second wind speed interval
After data, the second vibration data is transferred in data processing equipment 2 by wireless signal or wire signal, data processing dress
Put 2 and the second vibration data received be subjected to high-pass filtering, then carry out again auto-power spectrum analysis extract prominent frequency values with
And the maximum amplitude and envelope curve of vibration signal time-history curves.
(3) the corresponding time-frequency characteristics of the 3rd vibration data are extracted, sensor 1 detects the 3rd vibration of the 3rd wind speed interval
After data, the 3rd vibration data is transferred in data processing equipment 2 by wireless signal or wire signal, data processing dress
Put 2 and the 3rd vibration data received is first subjected to high-pass filtering, auto-power spectrum analysis is then carried out again and extracts prominent frequency values
And the maximum amplitude and envelope curve of vibration signal time-history curves.
It is step S400, special according to first vibration data, the second vibration data and the corresponding time-frequency of the 3rd vibration data
The time-frequency characteristics of the reference vibration data of seeking peace detect the aeration level of wind power generation stepped connector.
Illustrate, Fig. 3 is step S400 flow chart, as shown in figure 3, the step S400 includes：
S401, in the time-frequency characteristics of the first vibration data, the second vibration data and the 3rd vibration data it is satisfied by predetermined article
During part, the connector is pointed out to be loosened for three-level；
S402, when the time-frequency characteristics of only the first vibration data and the second vibration data are satisfied by predetermined condition, point out
The connector is two grades of loosenings；
S403, when the time-frequency characteristics of only the first vibration data are satisfied by predetermined condition, it is one to point out the connector
Level loosens；
S404, when the first vibration data time-frequency characteristics not simultaneously meet predetermined condition when, point out shown in connector not
Loosen；
Wherein, the predetermined condition is different from reference to prominent frequency values for the protrusion frequency values of auto-power spectrum, maximum amplitude
The difference of reference maximum amplitude more than 10 times, the adjacent crest of envelope curve and trough is more than 10 times of reference envelope curve phase
Adjacent crest and the difference of trough.
Prominent frequency values refer to the number of times that vibration is completed in the unit interval, have reacted the vibration velocity of connector.When a certain
When the protrusion frequency values of the vibration data of operating mode are different from reference to frequency values are protruded, connector there may be loosening.Amplitude is also known as
Peak value, maximum amplitude is peak-peak, reflects the amplitude size of time-history curves change, and amplitude is bigger, illustrates that time-history curves become
The amplitude of change is bigger, illustrates that the vibration of connector is bigger, and the aeration level of connector may be more obvious.The adjacent ripple of envelope curve
The amplitude that the size of the difference of peak and trough equally can also react envelope curve change is bigger, and the aeration level of connector is brighter
It is aobvious.When the difference and the maximum amplitude and reference envelope under reference operating mode of the maximum amplitude crest adjacent with envelope curve and trough
When the difference of the adjacent crest of curve and trough possesses certain difference, it just can determine that connector loosens.Connector is same
Under one aeration level, the vibration data acquired in different wind speed intervals is different, accordingly, it would be desirable to be compared ability simultaneously
Learn the specific aeration level of connector.
The one-level of connector loosens, two grades loosen, aeration level that three-levels loosen in increasing trend, i.e. aeration level compared with
Small, aeration level is general, aeration level is serious.Attendant can be preferably loosening journey according to the concrete condition of aeration level
Spend seriously wind power generation stepped to be safeguarded, it is to avoid safeguard not in time, cause unnecessary accident to occur.
The invention provides a kind of wind power generation stepped connector aeration level detection method and detection means, by wind-force
The both sides of power generation column connector respectively set a sensor, and wind power generation stepped the first wind after each typhoon is arrived at is obtained respectively
The vibration data of fast interval vibration data, the vibration data of the second wind speed interval, and the 3rd wind speed interval；Then it will obtain
Three groups of vibration datas contrasted respectively with wind power generation stepped wind speed at operation initial stage in the reference vibration data of first interval, enter
And judge the aeration level of wind power generation stepped connector after each typhoon.Hereby it is achieved that wind power generation stepped connector loosens
The automatic detection of degree and identification, improve the maintenance efficiency that wind power generation stepped connector loosens damage, reduce wind power generation stepped
The generation of collapse accident, with important meaning of preventing and reducing natural disasters.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For, the present invention can have various changes and change.It is all any modifications made within spirit and principles of the present invention, equivalent
Replace, improve etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of wind power generation stepped connector aeration level detection method, methods described includes：
The reference vibration data of the connector is obtained, and extracts the corresponding time-frequency characteristics of the reference vibration data, when described
Frequency feature includes protrusion frequency values, the maximum amplitude and envelope curve of vibration signal time-history curves of vibration signal auto-power spectrum,
The reference vibration data is vibration data of the wind power generation stepped wind speed at operation initial stage in first interval；
Obtain respectively first vibration data of the connector under the first operating mode, the second vibration data under the second operating mode and
The 3rd vibration data under the 3rd operating mode, wherein, the first operating mode, the second operating mode and the 3rd operating mode correspond respectively to the first wind speed
Interval, the second wind speed interval and the 3rd wind speed interval；
The first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data are extracted respectively；
Shaken according to first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data and the reference
The time-frequency characteristics of dynamic data detect the aeration level of wind power generation stepped connector.
2. wind power generation stepped connector aeration level detection method according to claim 1, it is characterised in that the vibration
Data are obtained by being arranged at the sensor of wind power generation stepped connector both sides.
3. wind power generation stepped connector aeration level detection method according to claim 2, it is characterised in that the sensing
Device is force-balance accelerometer.
4. wind power generation stepped connector aeration level detection method according to claim 3, it is characterised in that the sensing
Device is towards cardinal wind.
5. wind power generation stepped connector aeration level detection method according to claim 1, it is characterised in that the reference
Vibration data is the more than hour wind power generation stepped instantaneous wind speed at operation initial stage of continuous acquisition 5 shaking during 10~20m/s
Dynamic data.
6. wind power generation stepped connector aeration level detection method according to claim 1, it is characterised in that the time-frequency
Then feature carries out auto-power spectrum analysis acquisition again by carrying out high-pass filtering to corresponding vibration data.
7. wind power generation stepped connector aeration level detection method according to claim 1, it is characterised in that described first
Wind speed interval is to be declined after typhoon is arrived to the wind speed interval for decaying to instantaneous wind speed 30m/s, second wind speed interval for typhoon
Wind speed interval of the instantaneous wind speed less than 20m/s and more than 10m/s is reduced to, the 3rd wind speed interval is that typhoon decays to instantaneous wind
Wind speed interval of the speed less than 10m/s and more than 5m/s.
8. wind power generation stepped connector aeration level detection method according to claim 1, it is characterised in that according to described
The time-frequency of first vibration data, the second vibration data and the corresponding time-frequency characteristics of the 3rd vibration data and the reference vibration data
The aeration level of the wind power generation stepped connector of feature detection includes：
When the time-frequency characteristics of the first vibration data, the second vibration data and the 3rd vibration data are satisfied by predetermined condition, point out
The connector loosens for three-level；
When the time-frequency characteristics of only the first vibration data and the second vibration data are satisfied by predetermined condition, the connector is pointed out
For two grades of loosenings；
When the time-frequency characteristics of only the first vibration data are satisfied by predetermined condition, the connector is pointed out to be loosened for one-level；
When the time-frequency characteristics of the first vibration data do not meet predetermined condition simultaneously, shown connector is pointed out not loosen；
Wherein, the predetermined condition is different from reference to prominent frequency values for the protrusion frequency values of auto-power spectrum, and maximum amplitude is more than
The reference envelope curve that the difference of 10 times of reference maximum amplitude, the adjacent crest of envelope curve and trough is more than 10 times is adjacent
The difference of crest and trough.
9. wind power generation stepped connector aeration level detection method according to claim 8, it is characterised in that the one-level
Loosen, the aeration level that two grades of loosenings, three-levels loosen is in increasing trend.
10. a kind of wind power generation stepped connector aeration level detection means, the detection means includes：
Sensor, is arranged at the both sides of the wind power generation stepped connector, for detecting vibration data；
Data processing equipment, is configured as performing the method as described in claim 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710346232.6A CN107153002B (en) | 2017-05-17 | 2017-05-17 | Wind power generation stepped connector aeration level detection method and detection device |
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|---|---|---|---|
| CN201710346232.6A CN107153002B (en) | 2017-05-17 | 2017-05-17 | Wind power generation stepped connector aeration level detection method and detection device |
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| CN107153002B CN107153002B (en) | 2019-06-28 |
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| WO2020107828A1 (en) * | 2018-11-28 | 2020-06-04 | Zhejiang Future Technology Institute (jiaxing) | Method and system for detecting fastening state of fastening structure |
| CN109738169B (en) * | 2018-11-28 | 2020-07-07 | 浙江未来技术研究院(嘉兴) | Method and system for detecting fastening state between structural members connected through fastening structure |
| US11353376B2 (en) * | 2019-03-25 | 2022-06-07 | Zhejiang Future Technology Institute (jiaxing) | Method and system for detecting fastening state of fastening structure |
| CN113092099A (en) * | 2021-04-26 | 2021-07-09 | 三一汽车制造有限公司 | Fastener looseness detection method and device based on power spectral density curve |
| CN113092099B (en) * | 2021-04-26 | 2023-07-07 | 三一汽车制造有限公司 | Fastener loosening detection method and device based on power spectrum density curve |
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