CN202648789U - Acquisition and analysis device for rotor vibration signals of variable-speed wind turbine generator - Google Patents
Acquisition and analysis device for rotor vibration signals of variable-speed wind turbine generator Download PDFInfo
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- CN202648789U CN202648789U CN 201220231233 CN201220231233U CN202648789U CN 202648789 U CN202648789 U CN 202648789U CN 201220231233 CN201220231233 CN 201220231233 CN 201220231233 U CN201220231233 U CN 201220231233U CN 202648789 U CN202648789 U CN 202648789U
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Abstract
The utility model relates to an acquisition and analysis device for rotor vibration signals of a variable-speed wind turbine generator, comprising a vibration sensor, a speed sensor, an acquisition unit and an analysis chip, wherein the acquisition unit is used for acquiring the data of the sensors; and the analysis chip is used for analyzing the acquired information. The acquisition and analysis device for rotor vibration signals of a variable-speed wind turbine generator internally installs a processing module in the acquisition unit, thus realizing integral period signal sequence interception of vibration signals and speed pulse signals, and being able to intelligently determine whether the sampling length can satisfy the subsequent analyzing requirements; the acquisition unit can realize intelligent storage of speed pulse signals and vibration signals; and the analysis chip is independent of the acquisition unit, and the analysis chip realizes interpolation resampling and specified speed time prolongation and simplifies the design of the processing module part of the acquisition unit.
Description
Technical field
The utility model relates to vibration-testing and signal processing technology field, particularly relates to a kind of data acquisition and analytical equipment for low speed variable speed variable working condition wind turbine group rotor vibration signal.
Background technology
The wind-powered electricity generation unit is the multi-body system of a Coupled Rigid-flexible, and its power source is the natural wind energy with very strong randomness and uncontinuity.Act on alternate loads such as aerodynamic force, inertial force and elastic force on the wind-powered electricity generation unit and the wind-powered electricity generation unit is deformed and vibrate, this can affect the normal operation of wind-powered electricity generation unit, can cause the wind-powered electricity generation unit to damage when serious.
The data acquisition and the analytical equipment that use at present are general device, the record of data is mainly finished in data acquisition, and carry out the conventional processing such as anti-aliasing filter, data analysis is integrated various universaling analysis methods, and do not consider the singularity of wind turbine group rotor vibration signal.
The wind turbine group rotor operates at the slow-speed of revolution (generally＜20rpm), under the dynamic loading, and rotary speed unstabilization is fixed, long-term variable parameter operation, operating condition is different from common rotating machinery, therefore, conventional data acquisition and analytical equipment are difficult to the characteristic information in effectively collection and the vibration of analysis wind turbine group rotor, and this analysis and fault diagnosis to wind turbine group rotor vibration signal has been brought difficulty.
This shows, how to found a kind of by synchronous acquisition, cycle division and interpolation second mining sample to wind turbine group rotor vibration signal and tach signal, thereby directly obtain to be beneficial to the waveform collection of illustrative plates of analysis, for wind turbine group rotor analysis of vibration signal and fault diagnosis provide collection and the analytical equipment of the new variable speed wind turbine group rotor vibration signal of foundation, real one of the current important research and development problem that belongs to.
The utility model content
The technical problems to be solved in the utility model provides a kind of collection and analytical equipment of variable speed wind turbine group rotor vibration signal, it can be divided and interpolation second mining sample by synchronous acquisition, cycle to wind turbine group rotor vibration signal and tach signal, thereby directly obtain to be beneficial to the waveform collection of illustrative plates of analysis, for wind turbine group rotor analysis of vibration signal and fault diagnosis provide foundation, thereby overcome existing the collection and the deficiency of analytical equipment.
For solving the problems of the technologies described above, collection and the analytical equipment of a kind of variable speed wind turbine of the utility model group rotor vibration signal, involving vibrations sensor, speed probe, collection the sensor data acquisition unit and the analysis chip that the information that collects is analyzed.
As a kind of improvement of the present utility model, described collecting unit comprises power module, acquisition module, processing module, memory module and communication module, and wherein: power module is whole collecting unit power supply; Acquisition module synchronous acquisition tach signal and vibration signal; Processing module is carried out filtering processing, the interval calculating of rotating speed to the signal that collects and is divided complete cycle; The signal that the memory module stores processor obtains and information; Communication module is responsible for collecting unit and is connected with communication between the analysis chip.
After adopting such design, the utility model has the following advantages at least:
1, built-in processing module in collecting unit realized burst intercepting complete cycle to vibration signal and rotational speed pulse signal, but whether the intelligent decision sampling length satisfies the subsequent analysis requirement;
2, collecting unit can be realized the intelligent storage to rotational speed pulse signal and vibration signal;
3, analysis chip and collecting unit are independent, and analysis chip has been realized interpolation second mining sample and specified the continuation of rotating speed time, has simplified the design of collecting unit processing module part.
Description of drawings
Above-mentioned only is the general introduction of technical solutions of the utility model, and for can clearer understanding technological means of the present utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the collection of the utility model variable speed wind turbine group rotor vibration signal and the structural representation of analytical equipment.
Fig. 2 is the collection of the utility model variable speed wind turbine group rotor vibration signal and the workflow synoptic diagram of analytical equipment.
Fig. 3, Fig. 4 are the synoptic diagram of analysis chip to specifying tach signal to carry out spectrum analysis in the utility model specific embodiment.
Embodiment
See also shown in Figure 1, collection and the analytical equipment 1 of the utility model variable speed wind turbine group rotor vibration signal, involving vibrations sensor 11, speed probe 12, collecting unit 13 and analysis chip 14.
Wherein, collecting unit 13 comprises power module, acquisition module, processing module, memory module and communication module: power module is responsible for the power supply of whole collecting unit 13, acquisition module is responsible for the synchronous acquisition of tach signal and vibration signal, processing module is responsible for interval the calculating and division complete cycle of filtering processing, rotating speed of signal, memory module is responsible for handling the intelligent storage of signal and relevant information, and communication module is responsible for the communication between collecting unit 13 and the analysis chip 14.
Collecting unit 13 is with vibration signal and the equiphase rotational speed pulse signal of constant duration synchronous acquisition vibration transducer 11 and speed probe 12, whether the automatic decision sampling length reaches the subsequent analysis requirement, intelligent storage rotating speed sequence and oscillating sequence data and the information such as complete cycle issue, rotation speed change interval.Analysis chip 14 realize to complete cycle vibration signal interpolation second mining sample and specify time continuation under the rotating speed.
Please cooperate and consult shown in Figure 2ly, the utility model is used the collection of variable speed wind turbine group rotor vibration signal of said apparatus and the workflow of analytical equipment may further comprise the steps:
Steps A utilizes speed probe 12 and vibration transducer 11 to obtain rotational speed pulse signal and vibration signal.Wherein, speed probe 12 gathers rotational speed pulse signal, following acquisition mode is arranged: along the uniform a plurality of reflecting strips 4(of main shaft 3 anglecs of rotation for the wind wheel of rated rotation speed of rotor less than 20rpm, five equilibrium is counted and should be satisfied at least n 〉=30) obtain the equiphase pulse, utilize speed probe 12 to obtain reflecting strips 4 pulse signals; Utilize speed probe 12 counting wheel hubs and junction, cabin bolt or expansion sleeve place bolt to obtain the equiphase pulse; Draw the equiphase pulse signal from the scrambler of wind-powered electricity generation unit; Perhaps other similar mode that realizes rotor equiphase pulse collection.
Step B, the acquisition module in the collecting unit 13 is with constant duration synchronous acquisition rotational speed pulse signal and vibration signal, and is better, and sampling length should be not less than 8 wind wheel swing circles.
Step C, processing module in the collecting unit 13 is processed step B gained signal, position pulse rising edge or negative edge be sequence constantly, Calculation Speed sequence according to this, and by the pulse sequence vibration signal of correspondence is divided into the vibration signal section, and intercept into the wind wheel rotation vibration signal sequence of complete cycle.
Better, the memory module in the collecting unit 13 is carried out intelligent storage to step C gained rotating speed sequence and burst, and with unpack storages such as burst data and complete cycle issue, rotating speed sequence of interval.
Step D, analysis chip 14 is by rotating speed sequence and the burst data of the communication module access collecting unit storage of collecting unit, to each complete cycle the vibration signal sequence carry out interpolation second mining sample, the vibration signal that the second mining sample is obtained is specified the time continuation under the rotating speed, obtains specifying the continuous shaking complete cycle signal of the rotating speed line frequency analysis of spectrum of going forward side by side.
Better, should guarantee in the analytic process of analysis chip 14: the vibration signal section that each adjacent tacho-pulse is corresponding has identical sampling number; Specify rotating speed in calculating gained rotating speed sequence variation interval.
Below enumerate the treatment step that specific embodiment comes application the utility model device:
Circumferentially be evenly equipped with reflecting strips 4 on the main shaft 3 of wind-powered electricity generation unit, vibration transducer 11 and speed probe 12 are installed in respectively main bearing 2 and main shaft 3 places of wind-powered electricity generation unit, and the signal that it collects is sent to data acquisition unit 13, analytic process is as follows:
A) with the magnetic mode low-frequency vibration acceleration transducer is installed at wind generator set main shaft bearing place, with the magnetic force dial framework speed probe is installed.
B) set the acquisition module sample frequency, and be 8 wind wheel swing circle synchronous acquisition rotational speed pulse signals and vibration signal by collecting unit acquiescence sampling length.
C) collecting unit is stored burst data and the unpacks such as complete cycle issue, rotating speed sequence of interval to the tacho-pulse sequence that collects with the vibration signal sequence is processed and intelligent storage.
D) analysis chip is by rotating speed sequence and burst data and the correlated characteristic information of the storage of collecting unit communication module access collecting unit, to each complete cycle the vibration signal sequence carry out respectively interpolation second mining sample, the vibration signal that the second mining sample is obtained is specified the time continuation under the rotating speed 15rpm, and the continuous shaking complete cycle signal that obtains 15rpm is gone forward side by side the line frequency analysis of spectrum as shown in Figure 3, Figure 4.
The utility model has mainly been considered the operation characteristic of the wind turbine group rotor slow-speed of revolution, variable working condition, utilize data collector with constant duration synchronous acquisition rotor oscillation signal and tacho-pulse string signal, and in the built-in processing module of data collector, realize dividing the complete cycle of signal, in analysis chip, realize the interpolation second mining sample of signal complete cycle and the time continuation under the appointment rotating speed, realized effective analysis of wind turbine group rotor vibration signal, for collection and the analysis of wind turbine group rotor vibration signal provides a kind of approach.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection domain of the present utility model.
Claims (2)
1. collection and the analytical equipment of a variable speed wind turbine group rotor vibration signal is characterized in that involving vibrations sensor, speed probe, collection the sensor data acquisition unit and the analysis chip that the information that collects is analyzed.
2. collection and the analytical equipment of variable speed wind turbine group rotor vibration signal according to claim 1 is characterized in that described collecting unit comprises power module, acquisition module, processing module, memory module and communication module, wherein:
Power module is whole collecting unit power supply;
Acquisition module synchronous acquisition tach signal and vibration signal;
Processing module is carried out filtering processing, the interval calculating of rotating speed to the signal that collects and is divided complete cycle;
The signal that the memory module stores processor obtains and information;
Communication module is responsible for collecting unit and is connected with communication between the analysis chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231233 CN202648789U (en) | 2012-05-22 | 2012-05-22 | Acquisition and analysis device for rotor vibration signals of variable-speed wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231233 CN202648789U (en) | 2012-05-22 | 2012-05-22 | Acquisition and analysis device for rotor vibration signals of variable-speed wind turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202648789U true CN202648789U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231233 Expired - Lifetime CN202648789U (en) | 2012-05-22 | 2012-05-22 | Acquisition and analysis device for rotor vibration signals of variable-speed wind turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202648789U (en) |
-
2012
- 2012-05-22 CN CN 201220231233 patent/CN202648789U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NATIONAL ELECTRIC NEW ENERGY TECHNOLOGY INSTITUTE Effective date: 20130702 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130702 Address after: 100000 Beijing City, Zhongguancun, South Street, building B, building No., level 56, level 16 Patentee after: Guodian United Power Technology Co., Ltd. Patentee after: Guodian New Energy Technology Institute Address before: 100000 Beijing City, Zhongguancun, South Street, building B, building No., level 56, level 16 Patentee before: Guodian United Power Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |