CN202501916U - Device for monitoring icing state of wind turbine blades based on vibration detection - Google Patents

Abstract

The utility model discloses a device for monitoring the icing state of wind turbine blades based on vibration detection. The device comprises a vibration sensing unit (1), a data acquisition unit (2) and a monitoring and processing unit (3), wherein the vibration sensing unit (1) acquires vibration signals produced during the running of the wind turbine blades in real time and outputs the vibration signals to the data acquisition unit (2); the data acquisition unit (2) carries out amplification, filtering and analog-to-digital conversion on the input vibration signals and then outputs the vibration signals to the monitoring and processing unit (3); and the monitoring and processing unit (3) diagnoses the current icing state of the wind turbine blades according to the vibration signals and outputs icing monitoring results. The device disclosed by the utility model has the advantages of accurate and real-time detection, no damage to the blades, no need for applying load or incentive, and simple and convenient use.

Description

Pneumatic equipment blades made ice coating state monitoring device based on vibration detection

Technical field

The utility model relates to technical field of wind power generation, is specifically related to a kind of pneumatic equipment blades made ice coating state monitoring device based on vibration detection.

Background technology

Wind energy is the huge and regenerative resource of sanitary safe very of content.Wind energy conversion system is the topmost equipment that is used for wind energy conversion at present, through wind energy conversion system the most at last wind energy can convert electric energy into.From the distribution of China's wind energy,, the phenomenon of icing can occur at pneumatic equipment blades made cold season (claiming " blade " again), thereby have a strong impact on unit output, unit safety property and economy though a lot of high latitude area wind resource is abundant.Therefore, unlatching operation and regulation and control anti-icing for wind energy conversion system to the ice coating state monitoring of wind machine oar leaf, deicer provide information promptly and accurately to have very important significance.The icing detection technique that adopts at present is all ripe not enough, especially utilizes wind machine oar leaf in operational process, the blade ice coating state to be monitored and still lacks the otherwise effective technique scheme.

The utility model content

The technical matters that the utility model will solve provides and a kind ofly detects accurately in real time, not damaged blade, need not imposed load or excitation, the pneumatic equipment blades made ice coating state monitoring device based on vibration detection easy to use.

In order to solve the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of pneumatic equipment blades made ice coating state monitoring device based on vibration detection; Involving vibrations sensing unit, data acquisition unit and monitoring processing unit; Pneumatic equipment blades made is gathered in real time at the vibration signal in when operation and export to said data acquisition unit in said vibrating sensing unit; Said data acquisition unit amplifies the vibration signal of input, export to said monitoring processing unit after filtering and the analog to digital conversion, and said monitoring processing unit is according to the current ice coating state of said vibration signal diagnosis pneumatic equipment blades made and export the icing monitoring result.

Further improvement as technique scheme:

Said data acquisition unit links to each other with the monitoring processing unit through wireless transmit/receive units; Said wireless transmit/receive units comprises the data transmission module and the data reception module of mutual pairing; Said data transmission module links to each other with data acquisition unit, and said data reception module links to each other with the monitoring processing unit.

Also comprise the data transmission vasculum that is installed on the wind energy conversion system wheel hub, said data acquisition unit and data transmission module are located at data and are sent in the vasculum; Said data reception module is installed in the wind energy conversion system cabin.

Said data acquisition unit comprises that the vibration signal prime amplifier that carries out amplification filtering and the vibration signal that is used for input that are used for input carry out analog-to-digital data acquisition unit, and said vibrating sensing unit links to each other with said data transmission module through prime amplifier, data acquisition unit successively.

Said prime amplifier is fixed on the inner girder of pneumatic equipment blades made; Said vibrating sensing unit comprises a plurality of vibration transducers; Said vibration transducer is adhesively fixed respectively in the inboard of pneumatic equipment blades made covering, and the induction direction of said vibration transducer is arranged along the direction of waving of pneumatic equipment blades made.

Said vibrating sensing unit comprises 6 vibration transducers, with pneumatic equipment blades made from the thickness to blade tip carry out 11 equal portions divide equally obtain 10 five equilibrium xsects and from the pneumatic equipment blades made thickness one side from 1 ^#Open numbering, said vibration transducer lays respectively at the 1st ^#, 3 ^#, 5 ^#, 7 ^#, 8 ^#, 10 ^#On the five equilibrium xsect, and said vibration transducer is located at the position of leaning on pneumatic equipment blades made front side 1/4 chord length on the said five equilibrium xsect.

The utlity model has following advantage:

1, the utility model detects the vibration of pneumatic equipment blades made in the actual motion through the vibrating sensing unit; Monitoring processing unit through hardware and softwares such as computing machine constitute is diagnosed the current ice coating state of pneumatic equipment blades made and is exported the icing monitoring result according to vibration signal; Can both monitor for accumulated snow, rime ice, rain ice etc.; Transducer arrangements is simple and convenient; The blade surface material is not had influence, and can under the non-stop-machine situation of wind energy conversion system, carry out the icing on-line monitoring, can reflect the situation of blade icing timely and accurately its blade; For the application of deicer provides reliable full and accurate foundation, have detect accurately in real time, not damaged blade, easy to use, applied range, long service life, advantage that reliability is high.

2, the vibrating sensing unit of the utility model extracts modal parameter based on the response under the environmental excitation structure; The monitoring processing unit moves model analysis through the extraction modal parameter and obtains the icing parameter of pneumatic equipment blades made and judge output icing monitoring result according to the icing parameter; Need not the extra excitation that applies; The modal parameter of being discerned meets actual condition and boundary condition, truly the dynamics of reflect structure under in working order; Need not to apply the artificial excitation, and lean on environmental excitation fully, be convenient to when operation, implement to gather and monitoring, have that monitoring is convenient rapidly, the advantage of good economy performance.

Description of drawings

Fig. 1 is the framed structure synoptic diagram of the utility model embodiment.

Fig. 2 sends vasculum for the data of the utility model embodiment and is installed on the structural representation on the wind energy conversion system wheel hub.

Fig. 3 is installed on the sectional structure synoptic diagram on the pneumatic equipment blades made for vibration transducer and the prime amplifier of the utility model embodiment.

Fig. 4 is installed on the position view on the pneumatic equipment blades made for the vibration transducer of the utility model embodiment.

Fig. 5 is the data transmit-receive schematic flow sheet of the utility model embodiment.

Fig. 6 is the flow chart of data processing synoptic diagram of the utility model embodiment.

Marginal data: 1, vibrating sensing unit; 11, vibration transducer; 2, data acquisition unit; 21, prime amplifier; 22, data acquisition unit; 3, monitoring processing unit; 4, wireless transmit/receive units; 41, data transmission module; 42, data reception module; 5, data are sent vasculum; 51, lead; 6, wind energy conversion system wheel hub; 61, pneumatic equipment blades made.

Embodiment

As shown in Figure 1; Present embodiment is based on pneumatic equipment blades made ice coating state monitoring device involving vibrations sensing unit 1, data acquisition unit 2 and the monitoring processing unit 3 of vibration detection; Vibrating sensing unit 1 gather in real time pneumatic equipment blades made 61 when operation vibration signal and export to data acquisition unit 2; Data acquisition unit 2 amplifies the vibration signal of input, export to monitoring processing unit 3 after filtering and the analog to digital conversion, and monitoring processing unit 3 is according to the current ice coating state of vibration signal diagnosis pneumatic equipment blades made 61 and export the icing monitoring result.

The data acquisition unit 2 of present embodiment links to each other with monitoring processing unit 3 through wireless transmit/receive units 4; Wireless transmit/receive units 4 comprises the data transmission module 41 and data reception module 42 of mutual pairing; Data transmission module 41 links to each other with data acquisition unit 2; Data reception module 42 links to each other with monitoring processing unit 3, and wireless transmit/receive units 4 is used for sending out the blade vibration signal data of motion fast accurately and reliably.In view of China's ISM band is 433MHz; 2.4GHz; And the frequency range that is lower than 135kHz; For the needs of existing Computer Analysis device of compatibility and programming, data transmission module 41 all constitutes based on MsP430 single-chip microcomputer and RF903 wireless data transceiving chip with data reception module 42 in the present embodiment, so the cost performance of wireless transmit/receive units 4 is higher simultaneously.Wireless transmit/receive units 4 major parameters are following: its working frequency range is 433MHz, high workload speed 50kbps, and efficient GFSK modulation, antijamming capability is strong, is particularly suitable for the Industry Control occasion; Low-power consumption 3-3.6V work, state is merely 2.5uA under the standby mode; But module software is established the address, just understands output data (provide and interrupt indication) when only receiving this machine address, can directly combine various single-chip microcomputers to use, and software programming is very convenient, is fit to on-the-spot baroque wind energy turbine set.

As shown in Figure 2, also comprise the data transmission vasculum 5 that is installed on the wind energy conversion system wheel hub 6 in the present embodiment, data acquisition unit 22 is located at data with data transmission module 41 and is sent in the vasculum 5; Data reception module 42 is installed in the wind energy conversion system cabin, and data are sent vasculum 5 inner data acquisition units 22 and linked to each other with vibrating sensing unit 1 through lead 51.Data acquisition unit 2 comprises that the prime amplifier 21 that the vibration signal that is used for input carries out amplification filtering carries out analog-to-digital data acquisition unit 22 with the vibration signal that is used for input, and vibrating sensing unit 1 links to each other with data transmission module 41 through prime amplifier 21, data acquisition unit 22 successively.In the present embodiment, prime amplifier 21 adopts DH5857, and the parameter of prime amplifier 21 is following: the maximum input quantity of electric charge: 10 ⁵PC; Input resistance: greater than 10 ¹¹Ω; Accuracy: less than 1%; Maximum bandwidth: DC～100kHz; Output voltage: 7V _RMsOutput current: 5mA.Data acquisition unit 22 adopts DH5922-1; Data acquisition unit 22 has independently A/D converter; Can realize the multi-channel parallel synchronized sampling, SF is not limited by port number, and the highest SF is the 128kHz/ passage; Interchannel does not have cross talk effects, improves the antijamming capability of system simultaneously greatly.Every passage of data acquisition unit 22 all has independently DSP system for real-time signal processing; Analog filtering+DSP real-time digital filtering constitutes the high-performance anti alias filter; Analyzing the interior flatness of frequency band can reach ± 0.05dB; Stopband attenuation can be accomplished integer-period sampled, bridge circuit self-poise in real time greater than-150 dB/oct.

As shown in Figure 3; Prime amplifier 21 is fixed on the girder of pneumatic equipment blades made 61 inside; Vibrating sensing unit 1 comprises a plurality of vibration transducers 11; Vibration transducer 11 is adhesively fixed inboard in the covering of pneumatic equipment blades made 61 respectively, and the induction direction of vibration transducer 11 is arranged along the direction of waving of pneumatic equipment blades made 61.The mounting structure of prime amplifier 21 has the following advantages: (1) equipment self-protection ability is strong; The covering of vibrating sensing unit 1 pre-buried pneumatic equipment blades made 61 is inboard; The signal adapting amplifier device also can be installed in the inside configuration of pneumatic equipment blades made 61; Do not expose on the surface, can not receive ectocine and damage, so the life-span also is increased dramatically; (2) can realize on-line monitoring,, need not to measure blade imposed load size, directly calculate the blade Mode Shape through the transport method owing to adopt the operation modal theory; (3) the blade material to pneumatic equipment blades made 61 does not have damage.As shown in Figure 4; The figure middle and upper part is the side-looking structural representation of pneumatic equipment blades made 61; The figure middle and lower part is the plan structure synoptic diagram of pneumatic equipment blades made 61; Wherein the A place is the thickness of pneumatic equipment blades made 61, and the B place is the strong point of the chord length of pneumatic equipment blades made 61, and the C line segment is the position line of pneumatic equipment blades made 61 front sides 1/4 chord length.The vibrating sensing unit 1 of present embodiment comprises 6 vibration transducers 11, with pneumatic equipment blades made 61 from the thickness to blade tip carry out 11 equal portions divide equally obtain 10 five equilibrium xsects and from pneumatic equipment blades made 61 thickness one side from 1 ^#Open numbering, vibration transducer 11 lays respectively at the 1st ^#, 3 ^#, 5 ^#, 7 ^#, 8 ^#, 10 ^#On the five equilibrium xsect, and vibration transducer 11 is located at the position (promptly being arranged on the C line segment of Fig. 3) of leaning on pneumatic equipment blades made 61 front sides 1/4 chord length on the five equilibrium xsect.

Vibration transducer 11 employing models are the acceleration transducer of DH130 in the present embodiment, and its concrete parameter is following: sensitivity: 0～1 (pC/ms ^-2); Frequency response: 1～10k (Hz); Range: 0～5000 (m/s ²).The judgement of 3 pairs of icing monitorings of monitoring processing unit is mainly judged to 3 first order modes through 1 rank of waving direction, so basic accurately and effectively the going up that be installed in of vibration transducer 11 accomplished signals collecting with minimum transducer arrangements quantity.In the present embodiment, pneumatic equipment blades made 61 is carried out equalization divides, with pneumatic equipment blades made 61 from the thickness to blade tip carry out 11 equal portions divide equally obtain 10 xsects and from pneumatic equipment blades made 61 thickness one side from 1 ^#Open numbering is numbered 1 among Fig. 3 ^#～10 ^#The five equilibrium xsect be and divide equally 10 five equilibrium xsects that obtain, be numbered 11 ^#Xsect is the xsect at the blade tip place of pneumatic equipment blades made 61.Know in first three first order mode that according to doing the vibration experiment model analysis pneumatic equipment blades made 61 thickness and chord length maximum cause pneumatic equipment blades made 61 amplitudes less relatively because rigidity is bigger, wherein are numbered 1 ^#～3 ^#The amplitude of five equilibrium cross-section be no more than 0.1 and very low, and be numbered 1 ^#～5 ^#Five equilibrium xsect part amplitude regular strong, and be numbered 6 ^#～11 ^#The five equilibrium xsect cross section part vibration shape change greatly, so the many sensor installations of blade latter half are numbered 6 doing simultaneously in the experiment ^#The five equilibrium cross-section node of vibration mode position (promptly in this rank Mode Shape, its amplitude is 0, and sensor can not surveyed this first order mode at this point) of 2 first order modes appears easily, be numbered 9 ^#The five equilibrium cross-section 2,3 first order mode nodes appear easily; So do not select to install vibration transducer 11; Circle partly is the installation site of vibration transducer 11 on the pneumatic equipment blades made 61 among Fig. 3, also can carry out specifically distributing rationally of other according to all kinds of blade concrete structures in addition.

The monitoring processing unit 3 of present embodiment adopts computer realization, and computer loads has to be programmed by LabVIEW and realizes moving model analysis.The configuration of computing machine is following in the present embodiment: CPU adopts the CPU of Intel; CPU frequency is 2.93GHz; In save as 2GB; Hard disk is 500GB, the computing machine in the present embodiment can be controlled 2 passages～256 port numbers and adopt the sampling of running simultaneously, and has satisfied the measurement demand of hyperchannel, high precision, high speed Dynamic Signal.The operation model analysis from the mutual spectral density method be a kind of simply, the following excitation method of modal parameters down of environment-identification efficiently, be the improvement and the development of Peak Intensity Method.

General under the situation that can survey excitation, can know that by the excitation and the relation of response the frequency response function from the mutual spectral density method is:

$h_{\mathrm{ik}}\left(\mathrm{\ω}\right)=\frac{x_i}{f_k}=\underset{r=1}{\overset{N}{\mathrm{\Σ}}}\frac{{\mathrm{\Φ}}_{\mathrm{ir}}{\mathrm{\Φ}}_{\mathrm{ir}}}{(\mathrm{j\ω}-{\mathrm{\λ}}_r)(\mathrm{j\ω}-{\stackrel{\‾}{\mathrm{\λ}}}_r)}---\left(1\right)$

Wherein, Φ _Ir, Φ _KrBe respectively the vibration shape vector of r rank Mode Shape at blade i and k point place; k _rRigidity for pneumatic equipment blades made; ζ is the damping ratio of pneumatic equipment blades made; J is the imaginary part of symbol of plural number, and ω is the vibration frequency of pneumatic equipment blades made,

And λ _rBe structural characteristic parameter, x _iBe the vibratory response that pneumatic equipment blades made records at the i point sensor, f _kBe the dynamic excitation of pneumatic equipment blades made at k point place, Ω _rBe r rank natural frequency.λ wherein _r=ω/Ω _rCan't record dynamic excitation in that actual wind energy conversion system is in service, so said operation modal analysis method below adopting.

For wind energy conversion system, wind-induced impulse excitation can think to have flat mass spectrum, therefore satisfies:

f _k(ω)＝f(ω)＝C ₁； $x_i\left(\mathrm{\ω}\right)=f\left(\mathrm{\ω}\right)\underset{k=1}{\overset{m}{\mathrm{\Σ}}}{h}_{\mathrm{ik}}\left(\mathrm{\ω}\right)=C_1{h}_i\left(\mathrm{\ω}\right)---\left(2\right)$

Wherein, f _k(ω) represent mode (time-domain signal carries out the FFT conversion, and FFT is FFT) for the signal frequency-domain of k point place excitation on the pneumatic equipment blades made, f (ω) is the frequency domain representation of wind-induced impulse excitation, C ₁Be permanent number, x _i(ω) be k point place frequency domain response signal on the pneumatic equipment blades made (time-domain signal that records by vibration transducer 11 carry out FFT change obtain), h _IkThe frequency domain response function of (ω) ordering for the i point relative k in place on the pneumatic equipment blades made, h _i(ω) be the frequency domain response function at i point place on the pneumatic equipment blades made.

Under the situation of having only structural response to survey; Can suppose that (RP is promptly chosen the RP that the bigger point of amplitude is analyzed as blade vibration to structural certain point at pneumatic equipment blades made 61 places for RP; The position of non-layout vibration transducer 11); Its response is as input, and the response of other measuring point and RP have kind of a linear dependence, set up the transport function of response point and carry out system identification.Structurally get a point of fixity, its transport can be expressed as:

$a_i\left(\mathrm{\&omega;}\right)=\frac{f\left(\mathrm{\&omega;}\right)\underset{k=1}{\overset{m}{\mathrm{\&Sigma;}}}{h}_{\mathrm{ik}}\left(\mathrm{\&omega;}\right)}{f\left(\mathrm{\&omega;}\right)\underset{k=1}{\overset{m}{\mathrm{\&Sigma;}}}{h}_{\mathrm{pk}}\left(\mathrm{\&omega;}\right)}=\frac{\underset{k=1}{\overset{m}{\mathrm{\&Sigma;}}}{h}_{\mathrm{ik}}\left(\mathrm{\&omega;}\right)}{\underset{k=1}{\overset{m}{\mathrm{\&Sigma;}}}{h}_{\mathrm{pk}}\left(\mathrm{\&omega;}\right)}=\frac{{\mathrm{\&Phi;}}_{\mathrm{ir}}}{{\mathrm{\&Phi;}}_{\mathrm{ir}}}={\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA0000149811640000011.png"\; state="\{\{state\}\}">C</figure-callout>}}_2{\mathrm{\&Phi;}}_{\mathrm{ir}}={\widetilde{\mathrm{\&Phi;}}}_{\mathrm{ir}}---\left(3\right)$

Wherein, choose p point point as a reference, h _PkThe frequency domain response function of (ω) ordering for the p point relative k in place on the pneumatic equipment blades made 61, h _IkThe frequency domain response function of (ω) ordering for the i point relative k in place on the pneumatic equipment blades made 61, Φ _PrBe the vibration shape vector at Mode Shape p point place on pneumatic equipment blades made 61 in r rank on the pneumatic equipment blades made 61,

For pneumatic equipment blades made 61 r rank Mode Shape i point on pneumatic equipment blades made 61 is sentenced the vibration shape vector that RP draws as input, C ₂Be constant.

Can know by (3) formula, through directly reading curve a _i(ω) at ω _r(the curve a of place _i(ω) specifically being meant the blade frequency response curve, is independent variable with the frequency, and the response amplitude at i point place is the curve that dependent variable is drawn; ω _rRefer to the maximum Frequency point of response amplitude under the mode of r rank) amplitude and phase place, just can obtain the work vibration shape of respective frequencies structure, the r first order mode of regarding structure as that it is similar to.Suppose structure has been obtained the vibration shape measurement data of serviceable condition and virtual condition, the change amount that the j rank mode of establishing the displacement structure Mode Shape is ordered to i for

then

Wherein, The displacement structure Mode Shape amount that j rank mode i is ordered under

expression icing situation, the displacement structure Mode Shape amount that j rank mode i is ordered under expression normal condition.(δ and

as a whole symbol; Wherein j is a subscript, the expression rank number of mode; I is a subscript, the i point on the expression blade).

The variable quantity that a certain first order mode can appear in each icing position is bigger; Therefore contained strain energy is also bigger, supposes that the strain energy of the next measuring point i of j first order mode then has for

Wherein, k is a measuring point quantity, and j representes mode under the j rank, and i representes i point place on the pneumatic equipment blades made 61.

Finally; Monitoring processing unit 3 meets or exceeds a certain numerical value (non-definite value according to formula (5) is calculated

as if some

numerical value or one section

numerical value; Because the structure owing to pneumatic equipment blades made 61 in the practice process is different; The layout quantity of vibration transducer 11 is different; The criterion value of

can be different); Just show that numbering represented point of i and position section have the icing phenomenon, the size of

energy is represented ice covering thickness.

Like Fig. 5 and shown in Figure 6; The vibration transducer 11 real-time vibration signals of gathering pneumatic equipment blades made 61 obtain the sensor electrical signal in the course of the work; And export the sensor electrical signal to prime amplifier 21; Prime amplifier 21 amplifies the sensor electrical signal, export data acquisition unit 22 to after the filtering; Data acquisition unit 22 carries out the sensor electrical signal of prime amplifier 21 outputs to export monitoring processing unit 3 to after the A/D conversion; Monitoring processing unit 3 at first receives the blade vibration digital signal of data acquisition unit 22 outputs, then obtaining the current ice coating state of pneumatic equipment blades made 61 and exporting the icing testing result from mutual spectral density method extraction vibration signal characteristics through the operation model analysis.

The installation process of present embodiment is following:

1) when making pneumatic equipment blades made 61; Vibration transducer 11 and prime amplifier 21 is prefabricated in pneumatic equipment blades made 61; Being about to vibration transducer 11, to be bonded in the covering of pneumatic equipment blades made 61 through seccotine inboard and to make the induction direction of vibration transducer 11 be the direction of waving of blade, prime amplifier 21 is fixed on the girder of pneumatic equipment blades made 61;

2) data acquisition unit 22, data transmission module 41 and power supply being installed on data sends in the vasculum 5; Data are sent vasculum 5 to be fixedly mounted on above the wind energy conversion system wheel hub 6; The vibration transducer 11 that the input end of data acquisition unit 22 is connected above 3 pneumatic equipment blades mades 61 through 3 strands of leads 51 respectively, with data reception module 42 be installed in the correct position in wind energy conversion system cabin, the monitoring processing unit 3 that is connected in the master-control room through cable gets final product.

The above only is the preferred implementation of the utility model, and the protection domain of the utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to the protection domain of the utility model.Should be pointed out that for those skilled in the art in the some improvement and the retouching that do not break away under the utility model principle prerequisite, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims (6)

1. pneumatic equipment blades made ice coating state monitoring device based on vibration detection; It is characterized in that: involving vibrations sensing unit (1), data acquisition unit (2) and monitoring processing unit (3); Pneumatic equipment blades made (61) is gathered in real time at the vibration signal in when operation and export to said data acquisition unit (2) in said vibrating sensing unit (1); Said data acquisition unit (2) amplifies the vibration signal of input, export to said monitoring processing unit (3) after filtering and the analog to digital conversion, and said monitoring processing unit (3) is according to the current ice coating state of said vibration signal diagnosis pneumatic equipment blades made (61) and export the icing monitoring result.

2. the pneumatic equipment blades made ice coating state monitoring device based on vibration detection according to claim 1; It is characterized in that: said data acquisition unit (2) links to each other with monitoring processing unit (3) through wireless transmit/receive units (4); Said wireless transmit/receive units (4) comprises the data transmission module (41) and the data reception module (42) of mutual pairing; Said data transmission module (41) links to each other with data acquisition unit (2), and said data reception module (42) links to each other with monitoring processing unit (3).

3. the pneumatic equipment blades made ice coating state monitoring device based on vibration detection according to claim 2; It is characterized in that: also comprise the data transmission vasculum (5) that is installed on the wind energy conversion system wheel hub (6), said data acquisition unit (22) and data transmission module (41) are located at data and are sent in the vasculums (5); Said data reception module (42) is installed in the wind energy conversion system cabin.

4. according to claim 1 or 2 or 3 described pneumatic equipment blades made ice coating state monitoring devices based on vibration detection; It is characterized in that: said data acquisition unit (2) comprises that the vibration signal that is used for input carries out the prime amplifier (21) of amplification filtering and the vibration signal that is used for input carries out analog-to-digital data acquisition unit (22), and said vibrating sensing unit (1) passes through prime amplifier (21) successively, data acquisition unit (22) links to each other with said data transmission module (41).

5. the pneumatic equipment blades made ice coating state monitoring device based on vibration detection according to claim 4; It is characterized in that: said prime amplifier (21) is fixed on the inner girder of pneumatic equipment blades made (61); Said vibrating sensing unit (1) comprises a plurality of vibration transducers (11); Said vibration transducer (11) is adhesively fixed inboard in the covering of pneumatic equipment blades made (61) respectively, and the induction direction of said vibration transducer (11) is arranged along the direction of waving of pneumatic equipment blades made (61).

6. the pneumatic equipment blades made ice coating state monitoring device based on vibration detection according to claim 5; It is characterized in that: said vibrating sensing unit (1) comprises 6 vibration transducers (11), with pneumatic equipment blades made (61) from the thickness to blade tip carry out 11 equal portions divide equally obtain 10 five equilibrium xsects and from pneumatic equipment blades made (61) thickness one side from 1 ^#Open numbering, said vibration transducer (11) lays respectively at the 1st ^#, 3 ^#, 5 ^#, 7 ^#, 8 ^#, 10 ^#On the five equilibrium xsect, and said vibration transducer (11) is located at the position of leaning on pneumatic equipment blades made front side 1/4 chord length on the said five equilibrium xsect.

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