CN106225916A - Quantitative, the online detection method of fixed offshore platform security reliability - Google Patents
Quantitative, the online detection method of fixed offshore platform security reliability Download PDFInfo
- Publication number
- CN106225916A CN106225916A CN201610616591.4A CN201610616591A CN106225916A CN 106225916 A CN106225916 A CN 106225916A CN 201610616591 A CN201610616591 A CN 201610616591A CN 106225916 A CN106225916 A CN 106225916A
- Authority
- CN
- China
- Prior art keywords
- vibration
- acceleration
- offshore platform
- fixed offshore
- phase difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to a kind of fixed offshore platform security reliability, the Quantitative Monitoring method of dangerous spot location.On the horizontal plane of ocean platform spar deck outer, on due east, due south, Zheng Xi, Zheng Bei, the southeast, Nan Xi, northwest, eight directions of east northeast, set up the measurement point being angularly distributed respectively, in the vertical direction of point, positive northern horizontal direction, due east horizontal direction, low-frequency acceleration sensor and velocity sensor are installed same measurement simultaneously, measure fixed offshore platform spar deck acceleration of vibration in these 8 vertical direction measured on point, positive northern horizontal direction and due east horizontal direction and speed respectively；With the identical each sensor signal of sampling time interval synchronous acquisition, and respectively the acceleration in the respective direction of each measurement point and speed are carried out phase difference calculating, using maximum phase difference as the quantized value of this measurement point safe condition.What the present invention realized situation healthy and safe to fixed offshore platform quantitatively follows the tracks of for 24 hours.
Description
Technical field
The invention belongs to fixed offshore platform security reliability the study of the monitoring method field, relate to a kind of fixed ocean
The detection method that platform safety reliability is online, quantitative.
Background technology
China continues while a series of land large oilfield such as Daqing oil field, Zhongyuan Oil Field builds up, the Bohai Sea, the East Sea, the South Sea
Exploit the most accordingly Deng offshore oilfield.Because onshore oil field constantly declines through the exploitation of many decades, their oil and gas production, additionally, with
China to increase in the demand interests of the energy in recent years, therefore the exploitation for offshore oil and gas field is more and more important.At present, I
The marine petroleum development platform primary structure form of state is fixed offshore platform.Fixed offshore platform is applicable to several meters of the depth of water
To the waters of hundreds of meter.Under the effect of marine environment random load, fixed offshore platform often produce fatigue damage and
Producing fatigue rupture, the staff's life on working platform deck and property safety are caused threat greatly by this.In China
And in world wide, have the report that many fixed offshore platforms cause ocean platform collapse accident to occur due to various fatigue damages
Road.
Monitor field at fixed offshore platform safe condition, there is presently no a kind of work utilizing fixed offshore platform
Make the effective ways that the random micro-vibration of platform is analyzed, monitors.It practice, the condition from fixed offshore platform safety is sent out
Exhibition, prevent fixed offshore platform accident in the angle of possible trouble, then to pay attention to the random micro-vibration of fixed offshore platform more
Measurement and analysis.The process that collapsed of fixed offshore platform, the generation of this process and development be one from
The process of quantitative change to qualitative change, analyzes fixed offshore platform spar deck platform microvibration measuring in this process and just can
Pinpoint the problems the most as early as possible, and immediately take measures to formulate maintenance program, by the reparation of fixed offshore platform and should
The adjustment of power is avoided collapsing the generation of peril.
Summary of the invention
In order to overcome the deficiency in existing fixed offshore platform safety monitoring technology, the invention provides a kind of with reality
Time, dynamic mode, it is achieved the detection method quantitatively followed the tracks of to 24 hours of fixed offshore platform safe condition.The present invention
Technical scheme as follows:
The detection method that a kind of fixed offshore platform security reliability is online, quantitative, it comprises the following steps: step
The outer of S1: spar deck is gone up along the horizontal plane, in due east, due south, Zheng Xi, Zheng Bei, the southeast, Nan Xi, northwest, eight directions of east northeast
On, set up the measurement point being angularly distributed, be respectively arranged measurement apparatus；Step S2: measure the vertical direction of point, Zheng Bei same
Low-frequency acceleration sensor and velocity sensor are installed, it is achieved to fixed offshore platform in horizontal direction, due east horizontal direction
In spar deck vertical direction on 8 measurement points, acceleration of vibration and speed with each horizontal direction carry out kinetic measurement；
Wherein the vertical direction measuring point being designated as Z-direction, positive north horizontal direction is designated as N direction, and due east horizontal direction is designated as E direction；
Set up rectangular coordinate system for initial point measuring point, wherein Z-direction be Z axis, N direction be X-axis, E direction is Y-axis；Step S3: with phase
Same sampling time interval, the acceleration of vibration of eight measurement points upper (X, Y, Z) of synchronous acquisition spar deck and a vibration velocity
Signal；And the acceleration of vibration and vibration velocity signal obtaining spar deck in the X, Y, Z axis of 8, ground measurement point is carried out respectively
Phase difference calculating, draws this measurement point acceleration of vibration in X, Y, Z axis phase difference value to vibration velocity；Survey is repeated several times
Measure calculated average phase difference value, i.e. as the fixed offshore platform healthy and safe shape on this measurement point and the direction
Condition quantitative values；Step S4: this measures some phase contrast by the periodic detection to fixed offshore platform, record following calculation
The change of value, when phase difference value reaches marginal value, the safe condition that just correspond to fixed offshore platform there occurs dangerous change
Change and early warning；Step S5: compare by each phase difference value measuring point is carried out relative quantification, so that it is determined that fixed ocean is put down
The dangerous spot of platform and dangerous direction.
In an embodiment of the present invention, described low-frequency acceleration sensor and velocity sensor and fixed offshore platform work
It is rigidly connected as deck.
In an embodiment of the present invention, described sampling time interval is 10ms.
Further, described phase difference value calculates and comprises the following steps: believe with a synchronised clock and same triggering
Number control multiple signal picker, it is achieved the collection of the Complete Synchronization of multi signal, it is ensured that acceleration of vibration is to vibration velocity
Phase difference value computational accuracy；On the basis of synchronous acquisition, carry out discrete fast fourier transform to gathering data, it is thus achieved that
The phase-frequency characteristic of signal, is thus calculated the acceleration of vibration phase difference value to vibration velocity, particularly as follows: set acceleration of vibration
anIt is expressed asVibration velocity represents vnFor
Wherein T is acceleration of vibration and the cycle of vibration velocity signal, Am, VmIt is respectively acceleration of vibration and each Fourier of vibration velocity
Leaf transformation amplitude,It is respectively acceleration of vibration and vibration velocity phase place, TsFor the sampling interval；To anAnd vnCarry out discrete
After fast fourier transform, anAnd vnDiscrete spectrum characteristic in pth root spectral line be respectively
Then anAnd vnCorresponding phase contrast isWherein NTs=pT, p are natural number；Take front 5 spectral line (p
=1,2,3,4,5) phase contrast absolute value sum, as the acceleration of vibration phase difference value to vibration velocity.
The present invention uses low-frequency acceleration sensor and velocity sensor to detect fixed offshore platform work first in real time
Acceleration of vibration in all directions of plate and vibration velocity, and calculate each some all directions acceleration of vibration of measuring to vibration
The phase difference value of speed, records and follows the tracks of this phase difference value.It is capable of the 24 little of fixed offshore platform by the method
Time on-line real-time measuremen and dangerous spot location, reflect the actual health status of fixed offshore platform in time.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with being embodied as
Example is illustrated.
The detection method that a kind of fixed offshore platform security reliability is online, quantitative, it comprises the following steps: step
S1: the outer of fixed offshore platform spar deck is gone up along the horizontal plane, in due east, due south, Zheng Xi, Zheng Bei, the southeast, Nan Xi, northwest,
On eight directions of east northeast, set up the measurement point being angularly distributed；Step S2: measure the vertical direction of point, positive north level same
Low-frequency acceleration sensor and velocity sensor are installed in direction, due east horizontal direction, it is achieved fixed offshore platform is worked
In the vertical direction on 8 measurement points of the deck, acceleration of vibration and speed with each horizontal direction carry out kinetic measurement；Wherein
The vertical direction measuring point is designated as Z-direction, and positive north horizontal direction is designated as N direction, and due east horizontal direction is designated as E direction；To survey
Amount point sets up rectangular coordinate system for initial point, wherein Z-direction be Z axis, N direction be X-axis, E direction is Y-axis；Step S3: with identical
Sampling time interval, the acceleration of vibration of eight measurements point upper (X, Y, Z) of synchronous acquisition spar deck and vibration velocity signal；
And the acceleration of vibration and vibration velocity signal obtaining spar deck in the X, Y, Z axis of 8, ground measurement point is carried out phase place respectively
Difference calculates, and draws this measurement point acceleration of vibration in X, Y, Z axis phase difference value to vibration velocity；Meter is repeated several times
The average phase difference value obtained, i.e. fixed as the fixed offshore platform healthy and safe situation on this measurement point and the direction
Value；Step S4: by the periodic detection to fixed offshore platform, record following calculation phase difference value, work as phase difference value
When increasing to marginal value, just correspond to fixed offshore platform safe condition in correspondence measurement point respective direction and there occurs danger
Danger change early warning；Step S5: by each phase contrast measuring point is carried out quantitative contrast, determine the danger of fixed offshore platform
Danger point.
Described low-frequency acceleration sensor and velocity sensor are rigidly connected with fixed offshore platform work platforms.
In an embodiment of the present invention, described sampling time interval is 10ms.
Further, described phase difference value calculates and comprises the following steps: believe with a synchronised clock and same triggering
Number control multiple signal picker, to realize the collection of the Complete Synchronization of multi signal, it is ensured that acceleration of vibration is to vibration velocity
Phase difference value computational accuracy；On the basis of synchronous acquisition, carry out discrete fast fourier transform to gathering data
(FFT) acceleration of vibration phase difference value to vibration velocity, it is thus achieved that the phase-frequency characteristic of signal, thus it is calculated.FFT can be by counting
Calculation machine is carried out, and sampling number is the biggest, and the frequency of resolution is the most accurate.Particularly as follows: set acceleration of vibration anIt is expressed asVibration velocity represents vnForIts
Middle T is acceleration of vibration and the cycle of vibration velocity signal, Am, VmIt is respectively acceleration of vibration and each Fourier of vibration velocity
Conversion amplitude,It is respectively acceleration of vibration and vibration velocity phase place, TsFor the sampling interval；To anAnd vnCarry out discrete soon
After speed Fourier transform, anAnd vnDiscrete spectrum characteristic in pth root spectral line be respectively
Then anAnd vnCorresponding phase contrast isBecause synchronized sampling, therefore NTs=pT, p are natural number.
Take front 5 spectral lines (p=1,2,3,4,5) phase contrast absolute value sum, as the acceleration of vibration phase difference value to vibration velocity.
In an embodiment of the present invention: quantitative, the online detection method of fixed offshore platform security reliability includes
Following steps:
1. the outer of fixed offshore platform spar deck is gone up along the horizontal plane, in due east, due south, Zheng Xi, Zheng Bei, the southeast, south
On west, northwest, eight directions of east northeast, angularly in the X of distribution measuring point, Y, Z-direction, it is respectively mounted low-frequency acceleration sensor
And velocity sensor, vertical and horizontal directions acceleration of vibration and vibration velocity to fixed offshore platform spar deck are carried out
Kinetic measurement；
2. sensor must be rigidly connected with spar deck so that it is can the vibration of totally tansitive spar deck, at this
Measure the velocity sensor simultaneously installing vertical and horizontal low-frequency acceleration sensor and level on point, the vibration to spar deck
Acceleration and vibration velocity carry out kinetic measurement；
3. with identical sampling time interval (such as 10ms), the X, Y, Z axis of point is measured on Complete Synchronization collecting work deck
Vibration velocity signal on acceleration of vibration and X, Y, Z axis direction on direction, and to spar deck on the X, Y, Z axis direction obtained
Acceleration of vibration and vibration velocity signal carry out phase calculation, draw the phase difference value measuring point on correspondence direction；Measured
Calculated phase difference value, i.e. as fixed offshore platform healthy and safe situation amount on the correspondence direction that this measurement is put
Change value；
4. due to the healthy and safe situation of fixed offshore platform deteriorate time, the phase difference value that survey calculation obtains is up to face
Dividing value.By the periodic detection to fixed offshore platform, record tracking and monitoring point phase difference value, when phase difference value reaches to face
During dividing value, just correspond to fixed offshore platform and there occurs dangerous change early warning in the healthy and safe situation of this correspondence direction；
Therefore can be in real-time, online and dynamic mode, it is achieved 24 hours of situation healthy and safe to fixed offshore platform are quantitative
Follow the tracks of.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills
Art field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (4)
1. online, the quantitative detection method of a fixed offshore platform security reliability, it is characterised in that include following step
Rapid:
Step S1: the outer of spar deck is gone up along the horizontal plane, in due east, due south, Zheng Xi, Zheng Bei, the southeast, Nan Xi, northwest, east northeast eight
On individual direction, set up the measurement point being angularly distributed, be respectively arranged measurement apparatus；
Step S2: install low frequency acceleration biography in the vertical direction, positive northern horizontal direction, due east horizontal direction of same measurement point
Sensor and velocity sensor, it is achieved fixed offshore platform spar deck is measured in the vertical direction on putting and each water at 8
Square to acceleration of vibration and speed carry out kinetic measurement；Wherein the vertical direction measuring point is designated as Z-direction, positive north level
Direction is designated as N direction, and due east horizontal direction is designated as E direction；Setting up rectangular coordinate system with measurement point for initial point, wherein Z-direction is Z
Axle, N direction are X-axis, and E direction is Y-axis；
Step S3: with identical sampling time interval, the vibration of eight measurements point upper (X, Y, Z) of synchronous acquisition spar deck adds
Speed and vibration velocity signal；And to obtaining acceleration of vibration and the vibration velocity of spar deck in 8 X, Y, Z axis measuring point
Signal carries out phase difference calculating respectively, draws this measurement point acceleration of vibration in X, Y, Z axis phase contrast to vibration velocity
Value；Average phase difference value that survey calculation obtain is repeated several times, i.e. as fixed offshore platform in this measurement point and the direction
On healthy and safe situation quantitative values；
Step S4: this measures some phase difference value by the periodic detection to fixed offshore platform, record following calculation
Change, when phase difference value reaches marginal value, the safe condition that just correspond to fixed offshore platform there occurs dangerous change also
Early warning；
Step S5: compare by each phase difference value measuring point is carried out the relative quantification of different measuring time, so that it is determined that solid
The dangerous spot of fixed pattern ocean platform and dangerous direction.
Quantitative, the online detection method of fixed offshore platform security reliability the most according to claim 1, its feature
It is: described low-frequency acceleration sensor and velocity sensor are rigidly connected with the spar deck of fixed offshore platform.
Quantitative, the online detection method of fixed offshore platform security reliability the most according to claim 1, its feature
It is: described sampling time interval is 10ms.
Quantitative, the online detection method of fixed offshore platform security reliability the most according to claim 1, its feature
It is: described phase difference value calculates and comprises the following steps: control to adopt by a synchronised clock and same triggering signal
Storage is acquired low-frequency acceleration sensor and velocity sensor, to realize the collection of the Complete Synchronization of multi signal, it is ensured that shake
The dynamic acceleration phase difference value computational accuracy to vibration velocity；On the basis of synchronous acquisition, to gather data carry out from
Dissipate fast fourier transform, it is thus achieved that the phase-frequency characteristic of signal, be thus calculated the acceleration of vibration phase contrast to vibration velocity
Value, particularly as follows: set acceleration of vibration anIt is expressed asVibration velocity represents
vnForWherein T is acceleration of vibration and the cycle of vibration velocity signal,
Am, VmIt is respectively acceleration of vibration and the Fourier transform amplitude of vibration velocity,It is respectively acceleration of vibration and vibration speed
Degree phase place, TsFor the sampling interval；To anAnd vnAfter carrying out discrete fast fourier transform, anAnd vnDiscrete spectrum characteristic in
P root spectral line is respectivelyThen anAnd vnCorresponding phase contrast is
Wherein NTs=pT, p=are natural number；Take front 5 spectral lines (p=1,2,3,4,5) phase contrast absolute value sum, add as vibration
The speed phase difference value to vibration velocity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610616591.4A CN106225916B (en) | 2016-07-29 | 2016-07-29 | The quantitative of fixed offshore platform security reliability, online detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610616591.4A CN106225916B (en) | 2016-07-29 | 2016-07-29 | The quantitative of fixed offshore platform security reliability, online detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106225916A true CN106225916A (en) | 2016-12-14 |
| CN106225916B CN106225916B (en) | 2019-02-22 |
Family
ID=57536637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610616591.4A Active CN106225916B (en) | 2016-07-29 | 2016-07-29 | The quantitative of fixed offshore platform security reliability, online detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106225916B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908143A (en) * | 2017-03-01 | 2017-06-30 | 中国海洋大学 | Ocean platform monitoring system and method |
| CN109110073A (en) * | 2017-06-23 | 2019-01-01 | 上海交通大学 | Method for early warning, device and the equipment of marine floating type works parameter resonance movement |
| CN111323116A (en) * | 2020-03-26 | 2020-06-23 | 中国水产科学研究院黄海水产研究所 | Marine culture platform deformation and vibration monitoring system and using method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804563A (en) * | 2005-10-14 | 2006-07-19 | 北京交通大学 | Impact and vibration method for measuring natural frequency of bridge lower structure |
| CN101498688A (en) * | 2009-02-25 | 2009-08-05 | 中国海洋大学 | Ocean platform integral lossless detection method based on structural vibration |
| CN102759573A (en) * | 2012-07-25 | 2012-10-31 | 中国海洋石油总公司 | Frequency change-based structure damage positioning and damage degree evaluating method |
| CN103076394A (en) * | 2013-01-06 | 2013-05-01 | 中国海洋石油总公司 | Safety evaluation method for ocean platform based on integration of vibration identification frequencies and vibration mode |
| CN103123303A (en) * | 2012-12-25 | 2013-05-29 | 福州大学 | Quantifying and online monitoring method of bridge girder safe reliability |
| CN103243743A (en) * | 2013-05-21 | 2013-08-14 | 福州大学 | Quantitative detection method of safe reliability of tower foundation of wind generator |
| CN103398860A (en) * | 2013-07-26 | 2013-11-20 | 天津亿利科能源科技发展股份有限公司 | Method for monitoring safety of ocean platform on basis of displacement sensors |
| KR20160057153A (en) * | 2014-11-13 | 2016-05-23 | 대우조선해양 주식회사 | Rotating apparatus of reduced vortex induced vibration and offshore platform including the smae |
-
2016
- 2016-07-29 CN CN201610616591.4A patent/CN106225916B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804563A (en) * | 2005-10-14 | 2006-07-19 | 北京交通大学 | Impact and vibration method for measuring natural frequency of bridge lower structure |
| CN101498688A (en) * | 2009-02-25 | 2009-08-05 | 中国海洋大学 | Ocean platform integral lossless detection method based on structural vibration |
| CN102759573A (en) * | 2012-07-25 | 2012-10-31 | 中国海洋石油总公司 | Frequency change-based structure damage positioning and damage degree evaluating method |
| CN103123303A (en) * | 2012-12-25 | 2013-05-29 | 福州大学 | Quantifying and online monitoring method of bridge girder safe reliability |
| CN103076394A (en) * | 2013-01-06 | 2013-05-01 | 中国海洋石油总公司 | Safety evaluation method for ocean platform based on integration of vibration identification frequencies and vibration mode |
| CN103243743A (en) * | 2013-05-21 | 2013-08-14 | 福州大学 | Quantitative detection method of safe reliability of tower foundation of wind generator |
| CN103398860A (en) * | 2013-07-26 | 2013-11-20 | 天津亿利科能源科技发展股份有限公司 | Method for monitoring safety of ocean platform on basis of displacement sensors |
| KR20160057153A (en) * | 2014-11-13 | 2016-05-23 | 대우조선해양 주식회사 | Rotating apparatus of reduced vortex induced vibration and offshore platform including the smae |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908143A (en) * | 2017-03-01 | 2017-06-30 | 中国海洋大学 | Ocean platform monitoring system and method |
| CN106908143B (en) * | 2017-03-01 | 2019-04-26 | 中国海洋大学 | Ocean platform monitors system and method |
| CN109110073A (en) * | 2017-06-23 | 2019-01-01 | 上海交通大学 | Method for early warning, device and the equipment of marine floating type works parameter resonance movement |
| CN111323116A (en) * | 2020-03-26 | 2020-06-23 | 中国水产科学研究院黄海水产研究所 | Marine culture platform deformation and vibration monitoring system and using method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106225916B (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113836762B (en) | Wind turbine and wind power plant digital mirror image simulation display system | |
| CN108105039B (en) | A kind of deformation test device and application thereof that wind-driven generator tower is connect with basis | |
| CN103398860B (en) | A kind of ocean platform safety monitoring method of deformation based sensor | |
| CN105004503B (en) | Self-elevating ocean platform wind force coefficient testing experimental system | |
| EP3497326B1 (en) | Determining a wind turbine tower inclination angle | |
| CN106677996B (en) | A kind of tower barrel of wind generating set abnormal vibration detection method | |
| CN102901560A (en) | Safe comprehensive monitoring system for structure of offshore jacket platform | |
| CN203785909U (en) | Energy-saving control key parameter detection device for rotary drilling rig | |
| CN109443307A (en) | A kind of measuring system and method for transmission tower sedimentation and inclination angle based on optical measurement | |
| CN105736140A (en) | Diesel engine instantaneous rotational speed measurement and cylinder flameout fault diagnosis device and method | |
| CN106225916A (en) | Quantitative, the online detection method of fixed offshore platform security reliability | |
| CN105626389B (en) | System and method for monitoring tower state of wind generating set | |
| CN113239613B (en) | Method for judging swing degree alarm of water turbine unit | |
| CN103245326A (en) | Device and method for monitoring subsidence of jacket platform based on inclination angle monitoring | |
| CN103267873A (en) | Fault detecting system and method for propeller type anemometry sensor | |
| CN104931040A (en) | Installation and debugging method of Beidou generation-II navigation system electric iron tower deformation monitoring device based on machine learning | |
| Devriendt et al. | Continuous dynamic monitoring of an offshore wind turbine on a monopile foundation | |
| CN109211390A (en) | Transmission of electricity tower vibrations and Strength Safety test and appraisal procedure | |
| CN104481511B (en) | Method of using loading force to measure rod pumped well annular space working fluid level and work condition diagnosis method | |
| CN208366326U (en) | A kind of bridge column settlement monitoring device | |
| Carandell et al. | Impact on the wave parameters estimation of a kinetic energy harvester embedded into a drifter | |
| CN104390625A (en) | Exterior three-dimensional deformation monitoring method of street power station | |
| CN111308501A (en) | Laser radar wind measurement buoy offshore contrast verification test field and test method thereof | |
| CN116881662A (en) | Method for predicting icing disaster of rotating wind power blade | |
| Schepers et al. | Verification of European wind turbine design codes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |