CN106017895A - Early warning mechanism and early warning method for wind generation set - Google Patents
Early warning mechanism and early warning method for wind generation set Download PDFInfo
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- CN106017895A CN106017895A CN201610505126.3A CN201610505126A CN106017895A CN 106017895 A CN106017895 A CN 106017895A CN 201610505126 A CN201610505126 A CN 201610505126A CN 106017895 A CN106017895 A CN 106017895A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- 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
Abstract
The invention discloses an early warning mechanism and early warning method for a wind generation set. The wind generation set includes a blower tower including a tower and a flange assembly. The early warning mechanism comprises a three-directional acceleration sensor, a real-time vibration signal conditioning system, a real-time mode acquisition and spectrum analysis system, a plurality of force sensor assemblies, a plurality of real-time strain signal conditioning systems, a plurality of real-time strain acquisition and analysis system, a real-time spectrum comparison system, a real-time strain comparison system, a determination system and a data output system. According to the invention, on the basis of a monitoring way with dynamic and static combination, the acceleration sensor and a bolt fastening force sensor are used for detection. The acceleration sensor is installed on the top of the wind generation set tower to send a detection signal regularly, so that the mode changing situation of the system is monitored; according to the mode changing situation detected at a monitoring point, pre determination is carried out on a system fault; whether a mode change caused by bolt loosening is included is analyzed; and thus whether a flange bolt is loosened is determined.
Description
Technical field
The present invention relates to wind-driven generator field, be specifically related to the early warning mechanism of a kind of Wind turbines and the pre-police
Method.
Background technology
Owing to Wind turbines is the most remote, bad environments causes plant maintenance personnel manually not patrol
Inspection, the existing monitoring means for blower fan falls behind and attendant lacks experience, the wind thus caused in addition
Machine damages, collapse accident often has generation.
Tower determines the safety of blower fan as wind power generating set supporting construction, the stability of its structure.
In operation process, tower self gravitation to be born, wind thrust, the complicated alternate load impact such as torsion of impeller,
Between tower each several part, easily there is the phenomenon loosened in the bolt of adpting flange, and fan brings the biggest safety
Hidden danger.Therefore, for improving fan safe performance, monitoring flange bolt duty is very important.
Summary of the invention
For solving above-mentioned technical problem, the goal of the invention of the present invention is to provide the early warning plane of a kind of Wind turbines
Structure, its real-time monitoring tower cylinder vibration mode and flange bolt duty, it may be judged whether bolt looseness occurs,
And and alarm；Inefficacy bolt can also be accurately positioned, shorten the malfunction elimination time.
For achieving the above object, the present invention provides following technical scheme: the early warning of a kind of Wind turbines
Mechanism, described Wind turbines includes that blower fan tower barrel, described blower fan tower barrel include setting gradually from bottom to top many
Section tower and the layered flange assembly being separately positioned between adjacent two section tower, described early warning mechanism includes:
Three-dimensional acceleration transducer, it is arranged in the top of tower of the top, for whole described
The vibrational state of blower fan tower barrel detects；
The real-time conditioning system of vibration signal, it electrically connects with described three-dimensional acceleration transducer, for described
The signal of three-dimensional acceleration transducer is nursed one's health；
Mode Real-time Collection and spectral analysis system, its conditioning system real-time with described vibration signal electrically connects, and uses
Obtain in real time after the signal of described three-dimensional acceleration transducer after conditioning is carried out Real-time Collection and analysis of spectrum
Frequency spectrum；
Multiple force sensor modules, it is separately positioned in described layered flange assembly, and each described power senses
Device assembly is for detecting the strain regime of the flange of its place layer；
The real-time conditioning system of multiple strain signals, it electrically connects with the plurality of force sensor module, often respectively
The individual real-time conditioning system of described strain signal is for carrying out one group of signal of the force sensor module that it is connected
Conditioning；
Multiple strain Real-time Collections analyze system, its respectively conditioning system real-time with the plurality of strain signal electricity
Connecting, each described strain Real-time Collection analyzes system for its strain signal connected is nursed one's health system in real time
One group of signal of the force sensor module after tracking reason obtains one in real time after carrying out Real-time Collection and being compared
Stress difference；
Real time spectrum comparison system, it electrically connects with spectral analysis system with described mode Real-time Collection, for inciting somebody to action
Real time spectrum obtains frequency spectrum comparative result with setting after frequency spectrum contrasts；
Straining comparison system in real time, it is analyzed system with the plurality of strain Real-time Collection and electrically connects, and being used for will
Multiple described real-time stress differences and multiple setting stress differences obtain after contrasting respectively straining comparative result；
Judgement system, it is electrically connected with described real time spectrum comparison system and described real-time strain comparison system respectively
Connect, after described frequency spectrum comparative result and strain comparative result are contrasted with setting comparative result simultaneously
Obtain judged result；
Data output system, it electrically connects with described judgement system, is used for exporting described judged result；
Wherein, each described force sensor module includes being arranged in same layer flange assembly along horizontal hoop
Multiple force transducers, each real-time conditioning system of described strain signal and the multiple power in same layer flange assembly
Sensor electrically connects.
In technique scheme, described flange assembly includes the upper strata being arranged in the lower end of the tower of upside
Flange, it is arranged in lower floor's flange of upper end of tower of downside, upper strata flange and institute described in upper and lower cross-under
State the bolt of lower floor's flange and be connected and lock described upper strata flange and described lower floor with described bolt thread
The nut of flange, described force transducer be the bolt clipping forcee sensor being arranged between bolt and bolt hole and/
Or it is arranged on the pressure transducer between upper strata flange and lower floor's flange.
In technique scheme, the real-time conditioning system of described vibration signal includes for described three-dimensional acceleration
The first modification amplifier that the signal of sensor is amplified and the ADC transducer carrying out analog digital conversion,
The real-time conditioning system of described strain signal include for the one of force sensor module group of signal is amplified
Two modification amplifiers and the 2nd ADC transducer carrying out analog digital conversion.
In technique scheme, described mode Real-time Collection and spectral analysis system include for gather, analyze with
And store a MCU microprocessor of the signal of three-dimensional acceleration transducer and be used for controlling described first
First data acquisition controller of MCU microprocessor, each described strain Real-time Collection is analyzed system and is included using
The 2nd micro-place of MCU in one group of signal of the force sensor module gathering, compare and storing same layer flange
Manage device and for controlling the second data acquisition controller of described 2nd MCU microprocessor.
In technique scheme, described data output system is audio communication alarm and/or light news alarm.
In technique scheme, described three-dimensional acceleration transducer, the real-time conditioning system of described vibration signal with
And described mode Real-time Collection constitutes on-the-spot Modal detection unit, the plurality of force transducer with spectral analysis system
Assembly, the real-time conditioning system of the plurality of strain signal and the plurality of strain Real-time Collection analyze system structure
Become on-the-spot strain detecting unit, described real time spectrum comparison system, described real-time strain comparison system, described
Judgement system and described data output system constitute remote monitoring unit, described on-the-spot Modal detection unit and
Described on-the-spot strain detecting unit is electrically connected with described remote monitoring unit by data transmission network.
In technique scheme, described on-the-spot Modal detection unit and described on-the-spot strain detecting unit also configure that
Power supply unit, said supply unit is had to include power management PMU, the input of described power management PMU
It is connected and/or by DC/DC transducer and the sun with on-the-spot Wind turbines power supply by AC/DC transducer
Can connect and/or be directly connected to accumulator by power supply, the outfan of described power management PMU is respectively with described
On-the-spot Modal detection unit and described on-the-spot strain detecting unit electrical connection.
In technique scheme, some described blower fan tower barrels constitute a wind after being connected by data transmission network
Electricity group, each described wind power group is provided with a group controller for this group of all data of packing, described group
The outfan of controller is electrically connected with described remote monitoring unit by data transmission network.
In technique scheme, again by number after being connected by data transmission network between some described wind power group
Electrically connect with described remote monitoring unit according to transmission network.
The present invention also provides for another one technical scheme: the method for early warning of a kind of Wind turbines, uses above-mentioned pre-
Alert mechanism, described method for early warning includes following mode contrast operation, strain contrast operation and Comprehensive Correlation work
Sequence,
Described mode contrast operation comprises the steps:
S11, by described three-dimensional acceleration transducer, the vibrational state of whole described blower fan tower barrel is examined
Survey；
S12, by described vibration signal real-time conditioning system, the signal of described three-dimensional acceleration transducer is carried out
Conditioning；
S13, by described mode Real-time Collection and spectral analysis system to the described three-dimensional acceleration sensing after conditioning
The signal of device obtains real time spectrum after carrying out Real-time Collection and analysis of spectrum；
Described strain contrast operation comprises the steps:
S21, respectively the strain regime of the flange of its place layer is examined by the plurality of force sensor module
Survey；
S22, the force sensor module respectively it connected by the real-time conditioning system of the plurality of strain signal
One group of signal nurse one's health；
S23, by the plurality of strain Real-time Collection analyze system real-time to its strain signal connected respectively
One group of signal of the force sensor module after conditioning system conditioning obtains many after carrying out Real-time Collection and being compared
Individual real-time stress difference；
Described Comprehensive Correlation operation comprises the steps:
S31, by described real time spectrum comparison system by described real time spectrum with set after frequency spectrum contrasts,
Draw the frequency spectrum comparative result that the mode whether whole blower fan tower barrel causes changes because of bolt looseness；
S32, by described real-time strain comparison system by multiple described real-time stress differences and multiple setting stress
After difference contrasts respectively, draw the strain comparative result of the flange layer at bolt looseness place；
S33, by described judgement system to described frequency spectrum comparative result and strain comparative result simultaneously with set ratio
Judged result is obtained after relatively result contrasts；
S34, data output system, it electrically connects with described judgement system, is used for exporting described judged result；
Wherein, described mode contrast operation and described strain contrast operation synchronize to carry out.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that the present invention is led to
Cross the monitoring mode being association of activity and inertia, be respectively adopted two kinds of sensors and be monitored, i.e. acceleration transducer and spiral shell
Bolt fastening force sensor, by installing acceleration transducer on tower barrel of wind generating set top, timing sends
Detection signal, thus monitor the Mode variation situation of this system, the Mode variation feelings detected according to monitoring point
Condition, thus the system failure is made pre-judgments, analyze the most whether comprise the mode caused due to bolt looseness
Change, based thereon determined whether that flange bolt loosens problem, by tight at every layer of flange bolt that is uniformly distributed along the circumference
Gu force transducer, monitoring the working bolt state at adpting flange position in real time, its loosening change will result directly in
The internal fastening force change of its bolt, the strain gauge transducer being fixed in bolt, will be according to strain size output
The data gathered will be carried out by the corresponding signal of telecommunication to data collection and analysis equipment, data collection and analysis equipment
Analyzing and compare, and sending long distance control system to by network, remote monitoring personnel is according to transmitting the number of coming
Make pre-judgments according to combining acceleration transducer collection information analysis result, thus make and equipment is safeguarded
Whether final conclusion.
Accompanying drawing explanation
Fig. 1 is the structural representation of the blower fan tower barrel of Wind turbines disclosed by the invention；
Fig. 2 is the connection diagram of flange assembly disclosed by the invention；
Fig. 3 is the compositional block diagram of early warning mechanism disclosed by the invention；
Fig. 4 be the real-time conditioning system of vibration signal of early warning mechanism disclosed by the invention, mode Real-time Collection with
The real-time conditioning system of spectral analysis system, strain signal and strain Real-time Collection analyze the connection diagram of system；
Fig. 5 is the compositional block diagram of power supply unit disclosed by the invention；
Fig. 6 is the connection diagram of multiple blower fan tower barrels in same wind power group disclosed by the invention；
Fig. 7 is the connection diagram of multiple wind power group disclosed by the invention.
Wherein, 110, tower；120, flange assembly；121, upper strata flange；122, lower floor's flange；123、
Bolt；124, nut；201, three-dimensional acceleration transducer；202, the real-time conditioning system of vibration signal；202-1、
First modification amplifier；202-2, an ADC transducer；203, mode is monitored and spectral analysis system in real time；
203-1, a MCU microprocessor；203-2, the first data acquisition controller；204, force transducer；
205, the real-time conditioning system of strain signal；205-1, the second modification amplifier；205-2, the 2nd ADC conversion
Device；206, real-time testing and analysis system is strained；206-1, the 2nd MCU microprocessor；206-2, second
Data acquisition controller；207, real time spectrum comparison system；208, comparison system is strained in real time；209, sentence
Disconnected system；210, data output system；211, power management PMU；212, AC/DC transducer；213、
On-the-spot Wind turbines power supply；214, DC/DC transducer；215, solar energy；216, accumulator；217、
Power supply handover module；218, group controller；200a, on-the-spot Modal detection unit；200b, on-the-spot strain inspection
Survey unit；200c, remote monitoring unit；200d, data transmission network；200e, power supply unit.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is described in further detail.With
Lower embodiment is used for illustrating the present invention, but is not limited to the scope of the present invention.
See Fig. 1 to Fig. 7, as shown in legend therein, the early warning mechanism of a kind of Wind turbines:
Above-mentioned Wind turbines includes blower fan tower barrel, and this blower fan tower barrel includes the ten sections of towers set gradually from bottom to top
Cylinder 110 and the nine layers of flange assembly 120 being separately positioned between adjacent two section tower 110, every layer of flange group
Part 120 includes being arranged in the upper strata flange 121 of the lower end of the tower of upside, being arranged in the tower of downside
Lower floor's flange 122 of upper end, this upper strata flange of upper and lower cross-under and uniform four bolt of this lower floor's flange of cylinder
123 and threaded with bolt 123 and lock four nuts of upper strata flange 121 and lower floor's flange 122
124。
Above-mentioned early warning mechanism includes:
One three-dimensional acceleration transducer 201, it is arranged in the top of tower of the top, for whole
The vibrational state of individual blower fan tower barrel detects；
One real-time conditioning system of vibration signal 202, it electrically connects with described three-dimensional acceleration transducer 201,
For the signal of three-dimensional acceleration transducer 201 is nursed one's health；
One mode Real-time Collection and spectral analysis system 203, its conditioning system 202 real-time with vibration signal is electrically connected
Connect, after the signal of the three-dimensional acceleration transducer 201 after conditioning is carried out Real-time Collection and analysis of spectrum
To real time spectrum；
Nine force sensor modules 204, it is separately positioned in nine layers of flange assembly 120, often organizes force transducer
Including four force transducers being distributed in along horizontal hoop between screw and the bolt of same layer flange assembly, often
Group force transducer 204 is for detecting the strain regime of its place flange layer；
Nine real-time conditioning systems of strain signal 205, it electrically connects with nine groups of force transducers 205 respectively, each
The real-time conditioning system of strain signal is adjusted for four signals recording its four force transducers connected
Reason；
Nine strain Real-time Collections analyze systems 206, its respectively with nine real-time conditioning systems of strain signal 205
Electrical connection, after its real-time conditioning system of strain signal connected is nursed one's health by each strain Real-time Collection analysis system
Four signals of four force transducers contrast after obtain four real-time stress differences；
Real time spectrum comparison system 207, it electrically connects with spectral analysis system 203 with mode Real-time Collection, is used for
By real time spectrum with set after frequency spectrum compares, draw what whether whole blower fan tower barrel caused because of bolt looseness
The frequency spectrum comparative result that mode changes；
Strain comparison system 208 in real time, it is analyzed system 204 with nine strain Real-time Collections and electrically connects, is used for
After nine real-time stress differences and nine setting stress values being compared, draw the flange at bolt looseness place
The strain comparative result of layer；
Judgement system 209, it is electric with real time spectrum comparison system 207 and real-time strain comparison system 208 respectively
Connect, after above-mentioned frequency spectrum comparative result and above-mentioned second result are comprehensively analyzed, obtain judged result；
Data output system 210, it electrically connects with judgement system 209, is used for exporting judged result.
Wherein, a force sensor module of corresponding connection, a real-time conditioning system of strain signal, a strain are in fact
Time acquisition analysis system constitute separately controllable control passage, multiple control passages can centralized Control.
Wherein, the real-time conditioning system of vibration signal 202 include for vibration signal is amplified first fit
Adjust amplifier 202-1 and an ADC transducer 202-2 of analog digital conversion, the real-time conditioning system of strain signal
205 include the second modification amplifier 205-1 and the second of analog digital conversion for being amplified strain signal
ADC transducer 205-2.
Mode Real-time Collection and spectral analysis system 203 include for gathering, analyze and store three-dimensional acceleration
Oneth MCU microprocessor 203-1 of the signal of sensor 201 and for controlling a MCU microprocessor
The first data acquisition controller 203-2 of 203-1, each strain Real-time Collection analyze system 206 include for
Gather, compare and store the 2nd micro-process of MCU of four signals of four force transducers of same layer flange
Device 206-1 and the second data acquisition controller 206-2 for control the 2nd MCU microprocessor 206-1.
Three-dimensional acceleration transducer the 201, first modification amplifier 202-1, an ADC transducer 202-2,
Oneth MCU microprocessor 203-1 and the first data acquisition controller 203-2 constitutes on-the-spot Modal detection list
Unit 200a, 204, nine modification amplifier 205-1 of nine groups of force transducers, nine the 2nd ADC transducer 205-2,
Nine the 2nd MCU microprocessor 206-1 and nine the second data acquisition controller 206-2 constitute scene and answer
Become detector unit 200b, real time spectrum comparison system 207, in real time strain comparison system 208, judge system
209 and data output system 210 constitute remote monitoring unit 200c, on-the-spot Modal detection unit 200a and
On-the-spot strain detecting unit 200b is electrically connected with remote monitoring unit 200c by data transmission network 200d.
On-the-spot Modal detection unit 200a and on-the-spot strain detecting unit 200b is also configured with power supply unit 200e,
Power supply unit 200e includes that power management PMU 211, power management PMU211 are by AC/DC transducer
212 are connected and/or by DC/DC transducer 214 and sun-generated electric power with on-the-spot Wind turbines power supply 213
215 connect and/or are directly connected to accumulator 216, and optimum mode is, accumulator 216 and power management
211 keep connecting, on-the-spot Wind turbines power supply 213 and solar energy 215 by power supply handover module 217 with
Power management PMU switches connection.
Above-mentioned data output system 210 is alarm device, does not reports to the police according to judged result or reports to the police..
Some above-mentioned blower fan tower barrels constitute a wind power group, and each wind power group is provided with one for this group that packs
The group controller of all data, group controller 223 electrically connects with remote monitoring unit 200c, and group is internal permissible
For star-like or bus structures.
Again by data transmission network and remotely monitoring after being connected by data transmission network between some wind power group
Unit electrically connects, and is serial bus structure between group and group.
The present invention, by making tower scale model, simulates its vibration mode by the corresponding excitation of input, presses
Loosen every layer of a few bolt according to practical situation and record the change of its vibration mode, sentencing as tower vibration mode
According to, such that it is able to judge whether the vibration of tower comprises the component caused due to bolt looseness, and according to
Test data contrast obtains which layer flange be loose bolts be positioned at, and positioning for loose bolts afterwards provides foundation.
As a comparison, set up the FEM (finite element) model of tower and parts thereof, simulate its working environment, obtain tower vibration
Simulation result.
The present invention uses the decision procedure of " being association of activity and inertia ", coordinates with efficient information transmission processing system, and with
Test data, as reference threshold, is finally reached the purpose monitoring each layer flange bolt duty.First
Carry out scale model test and simulation calculation and collect correlation test and calculate data；On-the-spot by blower fan tower
The ad-hoc location of cylinder installs acceleration transducer additional, is equipped with special data acquisition system real-time collecting tower vibration shape
State also carries out analysis of spectrum to signal, using scale model test and simulation result as reference, it may be judged whether
Abnormal vibrations form occurs；Arrange force transducer monitoring bolt fastening force at each layer flange ad-hoc location simultaneously,
After acceleration transducer judges bolt looseness occur, it is located by force transducer, for the dimension of unit
Repair offer to instruct and suggestion.
" being association of activity and inertia " monitoring mode of the present invention is respectively adopted two kinds of sensors and is monitored, i.e. acceleration sensing
Device and bolt clipping forcee sensor.
By installing acceleration transducer (being directly spirally connected fixing) on tower barrel of wind generating set top, timing is sent out
Signal is surveyed in censorship, thus monitors the Mode variation situation of this system；The Mode variation detected according to monitoring point
Situation, thus the system failure is made pre-judgments, analyze the most whether comprise the mould caused due to bolt looseness
State changes, and has based thereon determined whether that flange bolt loosens problem.By being uniformly distributed along the circumference 4 groups at every layer of flange
Bolt clipping forcee sensor, monitors the working bolt state at adpting flange position in real time, and it loosens change will be straight
Connecing and cause the internal fastening force change of its bolt, the strain gauge transducer being fixed in bolt will be according to strain size
Exporting the corresponding signal of telecommunication to data collection and analysis equipment, data collection and analysis equipment will be to the data gathered
Being analyzed and compare, and sending long distance control system to by network, remote monitoring personnel is according to transmitting
Data combine acceleration transducer and gather information analysis result and make pre-judgments, thus make and equipment carried out
The final conclusion whether safeguarded.
About power supply unit: Wind turbines exists generating and disables two kinds of duties at present, and the present invention takes
Power supply mode: wind-powered electricity generation cylinder is directly powered+second source (solar energy+accumulator), and PMU unit uses micro-
Processor controls, and can monitor power supply state in real time, if the area that the sunshine-duration is short, can use miniature
Wind-powered electricity generation is powered.Owing to monitoring system is low power dissipation design, therefore, the output power of below 10W can meet
The demand that monitoring system normally works.
Mode detects in real time and uses high accuracy 24bit ADC and low-power microprocessor with spectral analysis system, on-the-spot
Data transmission between the inside of Modal detection unit and on-the-spot strain detecting unit uses RS485 network.
All node datas of single blower fan tower barrel are carried out locally stored by data acquisition controller control, and
Carry out real-time data analysis, under normal condition, only transimiison analysis result, it is also possible to as desired to transmission is single
The data of individual node, remote monitoring computer, by the monitoring data of real-time reception each air duct group, once finds
Abnormal air duct, will report to the police in time.Can remotely transfer the locally stored data of abnormal air duct simultaneously, supply
Technical staff carries out detailed analysis.
The most above-mentioned data acquisition controller can be that single channel individually controls or multichannel centralized Control.
Data transmission network mode: in view of the present situation of wind-powered electricity generation network, can be specifically real to take 3 kinds of modes
During executing, be according to the practical situation of wind energy turbine set depending on.
1, use existing wind-powered electricity generation health data transmitting system (optical networking, power line carrier, existing wireless
Data transmission network etc.)；
2, local WIFI: may be used for the data transmission between node-group controller；
3, move GS Multi net voting: reliability is high, and cost is relatively low, it is possible to use GPRS, be only applicable to have
The area of cell phone network.
It is more than the description to the embodiment of the present invention, by the described above to the disclosed embodiments, makes this
Skilled artisan is capable of or uses the present invention.To the multiple amendment of these embodiments to this area
Professional and technical personnel for will be apparent from, generic principles defined herein can without departing from
In the case of the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will not be by
It is limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase
The widest consistent scope.
Claims (10)
1. an early warning mechanism for Wind turbines, described Wind turbines includes blower fan tower barrel, described blower fan tower barrel
Including the multistage tower set gradually from bottom to top and the multi-layer approach being separately positioned between adjacent two section tower
Blue assembly, it is characterised in that described early warning mechanism includes:
Three-dimensional acceleration transducer, it is arranged in the top of tower of the top, for whole described
The vibrational state of blower fan tower barrel detects；
The real-time conditioning system of vibration signal, it electrically connects with described three-dimensional acceleration transducer, for described
The signal of three-dimensional acceleration transducer is nursed one's health；
Mode Real-time Collection and spectral analysis system, its conditioning system real-time with described vibration signal electrically connects, and uses
Obtain in real time after the signal of described three-dimensional acceleration transducer after conditioning is carried out Real-time Collection and analysis of spectrum
Frequency spectrum；
Multiple force sensor modules, it is separately positioned in described layered flange assembly, and each described power senses
Device assembly is for detecting the strain regime of the flange of its place layer；
The real-time conditioning system of multiple strain signals, it electrically connects with the plurality of force sensor module, often respectively
The individual real-time conditioning system of described strain signal is for carrying out one group of signal of the force sensor module that it is connected
Conditioning；
Multiple strain Real-time Collections analyze system, its respectively conditioning system real-time with the plurality of strain signal electricity
Connecting, each described strain Real-time Collection analyzes system for its strain signal connected is nursed one's health system in real time
One group of signal of the force sensor module after tracking reason obtains one in real time after carrying out Real-time Collection and being compared
Stress difference；
Real time spectrum comparison system, it electrically connects with spectral analysis system with described mode Real-time Collection, for inciting somebody to action
Real time spectrum obtains frequency spectrum comparative result with setting after frequency spectrum contrasts；
Straining comparison system in real time, it is analyzed system with the plurality of strain Real-time Collection and electrically connects, and being used for will
Multiple described real-time stress differences and multiple setting stress differences obtain after contrasting respectively straining comparative result；
Judgement system, it is electrically connected with described real time spectrum comparison system and described real-time strain comparison system respectively
Connect, after described frequency spectrum comparative result and strain comparative result are contrasted with setting comparative result simultaneously
Obtain judged result；
Data output system, it electrically connects with described judgement system, is used for exporting described judged result；
Wherein, each described force sensor module includes being arranged in same layer flange assembly along horizontal hoop
Multiple force transducers, each real-time conditioning system of described strain signal and the multiple power in same layer flange assembly
Sensor electrically connects.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that described flange group
Part includes being arranged in the upper strata flange of the lower end of the tower of upside, is arranged in tower upper of downside
Lower floor's flange of end, upper strata flange described in upper and lower cross-under and the bolt of described lower floor flange and with described bolt
Threaded and lock described upper strata flange and the nut of described lower floor flange, described force transducer is for arranging
Bolt clipping forcee sensor between bolt and bolt hole and/or be arranged on upper strata flange and lower floor's flange it
Between pressure transducer.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that described vibration is believed
Number real-time conditioning system includes first suitable adjusting for be amplified the signal of described three-dimensional acceleration transducer
Amplifier and the ADC transducer carrying out analog digital conversion, the real-time conditioning system of described strain signal includes using
In the second modification amplifier that one group of signal of force sensor module is amplified with carry out the of analog digital conversion
Two ADC transducers.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that described mode is real
Time gather and include signal for gathering, analyze and store three-dimensional acceleration transducer with spectral analysis system
Oneth MCU microprocessor and for controlling the first data acquisition control of a described MCU microprocessor
Device, each described strain Real-time Collection is analyzed system and is included for gathering, compare and store same layer flange
The 2nd MCU microprocessor of one group of signal of force sensor module and to be used for controlling described 2nd MCU micro-
Second data acquisition controller of processor.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that described data are defeated
Going out system is audio communication alarm and/or light news alarm.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that described three-dimensional adds
Velocity sensor, the real-time conditioning system of described vibration signal and described mode Real-time Collection and spectral analysis system
Constituting on-the-spot Modal detection unit, the plurality of force sensor module, the plurality of strain signal are nursed one's health in real time
System and the plurality of strain Real-time Collection are analyzed system and are constituted on-the-spot strain detecting unit, described real-time frequency
Spectrum comparison system, described real-time strain comparison system, described judgement system and described data output system structure
Remote monitoring unit, described on-the-spot Modal detection unit and described on-the-spot strain detecting unit is become to be passed by data
Defeated network electrically connects with described remote monitoring unit.
The early warning mechanism of Wind turbines the most according to claim 6, it is characterised in that described on-the-spot mould
State detector unit and described on-the-spot strain detecting unit are also configured with power supply unit, and said supply unit includes electricity
Source control PMU, the input of described power management PMU is by AC/DC transducer and on-the-spot wind turbine
Group power supply connects and/or is connected with sun-generated electric power by DC/DC transducer and/or is directly connected with accumulator
Connecing, the outfan of described power management PMU strains with described on-the-spot Modal detection unit and described scene respectively
Detector unit electrically connects.
The early warning mechanism of Wind turbines the most according to claim 1, it is characterised in that some described wind
Machine tower constitutes a wind power group after being connected by data transmission network, and each described wind power group is provided with one
For the group controller of this group of all data of packing, the outfan of described group controller passes through data transmission network
Electrically connect with described remote monitoring unit.
The early warning mechanism of Wind turbines the most according to claim 8, it is characterised in that some described wind
Again by data transmission network and described remote monitoring unit electricity after being connected by data transmission network between electricity group
Connect.
10. the method for early warning of a Wind turbines, it is characterised in that use institute as arbitrary in claim 1 to 9
The early warning mechanism stated, described method for early warning includes following mode contrast operation, strain contrast operation and comprehensive
Contrast operation,
Described mode contrast operation comprises the steps:
S11, by described three-dimensional acceleration transducer, the vibrational state of whole described blower fan tower barrel is examined
Survey；
S12, by described vibration signal real-time conditioning system, the signal of described three-dimensional acceleration transducer is carried out
Conditioning；
S13, by described mode Real-time Collection and spectral analysis system to the described three-dimensional acceleration sensing after conditioning
The signal of device obtains real time spectrum after carrying out Real-time Collection and analysis of spectrum；
Described strain contrast operation comprises the steps:
S21, respectively the strain regime of the flange of its place layer is examined by the plurality of force sensor module
Survey；
S22, the force sensor module respectively it connected by the real-time conditioning system of the plurality of strain signal
One group of signal nurse one's health；
S23, by the plurality of strain Real-time Collection analyze system real-time to its strain signal connected respectively
One group of signal of the force sensor module after conditioning system conditioning obtains many after carrying out Real-time Collection and being compared
Individual real-time stress difference；
Described Comprehensive Correlation operation comprises the steps:
S31, by described real time spectrum comparison system by described real time spectrum with set after frequency spectrum contrasts,
Draw the frequency spectrum comparative result that the mode whether whole blower fan tower barrel causes changes because of bolt looseness；
S32, by described real-time strain comparison system by multiple described real-time stress differences and multiple setting stress
After difference contrasts respectively, draw the strain comparative result of the flange layer at bolt looseness place；
S33, by described judgement system to described frequency spectrum comparative result and strain comparative result simultaneously with set ratio
Judged result is obtained after relatively result contrasts；
S34, data output system, it electrically connects with described judgement system, is used for exporting described judged result；
Wherein, described mode contrast operation and described strain contrast operation synchronize to carry out.
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| CN107153002A (en) * | 2017-05-17 | 2017-09-12 | 中国地震局工程力学研究所 | Wind power generation stepped connector aeration level detection method and detection means |
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| CN113063576A (en) * | 2021-03-15 | 2021-07-02 | 北京云庐科技有限公司 | Traffic portal frame indicator looseness detection system and method |
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| CN113358342A (en) * | 2021-06-25 | 2021-09-07 | 中国华能集团清洁能源技术研究院有限公司 | Bolt monitoring system and method for wind generating set |
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