CN208607331U - A kind of generator stator core detection device and system - Google Patents
A kind of generator stator core detection device and system Download PDFInfo
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- CN208607331U CN208607331U CN201820992678.6U CN201820992678U CN208607331U CN 208607331 U CN208607331 U CN 208607331U CN 201820992678 U CN201820992678 U CN 201820992678U CN 208607331 U CN208607331 U CN 208607331U
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Abstract
The utility model discloses a kind of generator stator core detection device and systems, comprising: dsp processor and at least two audio collection modules；Audio collection module specifically includes: sonic transducer, audio-frequency amplifier, the first programmable amplifier, frequency overlapped-resistable filter, the second programmable amplifier and analog-digital converter；The output end of sonic transducer and the input terminal of audio-frequency amplifier connect, and the collection terminal of sonic transducer is directed toward the axle center of stator core, and whole sonic transducers are arranged at equal intervals around the outside diameter of stator core；The utility model collects noise signal when stator core operation by the high acoustic sensor array of directionality, then after converting audio signals into electric signal by the analog-digital converter of high-speed, high precision, it is input to dsp processor to carry out obtaining audible spectrum data, solves and be difficult to the technical issues of being widely applied in actual stator core detection engineering using the technology of noise measuring stator core caused by the prior art.
Description
Technical field
The utility model relates to equipment detection field more particularly to a kind of generator stator core detection devices and system.
Background technique
Stator core loosening is a kind of common defect of large turbo-type generator, be easy to cause iron core damage, stator grounding,
The harm such as stator vibration and rotor injury, or even cause serious harm to generator.
Although existing stator core detection technique can use noise and carry out quality discrimination to stator core, but current
Lack one kind effectively noise signal of acquisition stator core in industry and generates corresponding frequency spectrum data to test and analyze stator core
The device for loosening situation is resulted in and is difficult in actual stator core detection engineering using the technology of noise measuring stator core
Widely available technical problem.
Utility model content
The utility model discloses a kind of generator stator core detection device and systems, lack in the industry for solving current line
A kind of noise signal of few effectively acquisition stator core simultaneously generates corresponding frequency spectrum data, for testing and analyzing stator core loosening feelings
The device of condition, the caused technology using noise measuring stator core are difficult to general extensively in actual stator core detection engineering
And the technical issues of.
The utility model provides a kind of generator stator core detection device, comprising: dsp processor and at least two sounds
Frequency acquisition module；
The audio collection module specifically includes: sonic transducer, audio-frequency amplifier, the first programmable amplifier, anti-aliasing filter
Wave device, the second programmable amplifier and analog-digital converter；
The output end of the sonic transducer is connect with the input terminal of the audio-frequency amplifier, the collection terminal of the sonic transducer
It is directed toward the axle center of the stator core, and all the sonic transducer is arranged at equal intervals around the outside diameter of the stator core；
The input terminal of the output end of the audio-frequency amplifier and first programmable amplifier communicates to connect；
The output end of first programmable amplifier and the input terminal of the frequency overlapped-resistable filter communicate to connect；
The input terminal of the output end of the frequency overlapped-resistable filter and second programmable amplifier communicates to connect；
The output end of second programmable amplifier and the input terminal of the analog-digital converter communicate to connect；
First communication ends of the output end of the analog-digital converter and the dsp processor communicate to connect.
Preferably, the anti-aliasing filter implement body is made of the cascade of at least two low-pass filters.
Preferably, the sonic transducer is specially electret capacitor type sonic transducer.
Preferably, the dsp processor is specially TMS320F2812 chip.
Preferably, further includes: communication chip；
The control terminal of the communication chip and the second communication ends of the dsp processor communicate to connect.
Preferably, further includes: memory and human-computer interaction device；
The third communication end of the memory and the dsp processor communicates to connect；
The fourth communication end of the control terminal of the human-computer interaction device and the dsp processor communicates to connect.
The utility model provides a kind of generator stator core detection system characterized by comprising back-stage management is whole
End and generator stator core detection device above-mentioned；
The back-stage management terminal passes through communication chip in the generator stator core detection device and the power generation
The communication connection of machine stator iron core detection device.
As can be seen from the above technical solutions, the utility model has the advantage that
The utility model provides a kind of generator stator core detection device and system, wherein device includes: at DSP
Manage device and at least two audio collection modules；The audio collection module specifically includes: sonic transducer, audio-frequency amplifier, first
Programmable amplifier, frequency overlapped-resistable filter, the second programmable amplifier and analog-digital converter；The output end of the sonic transducer with it is described
The input terminal of audio-frequency amplifier connects, and the collection terminal of the sonic transducer is directed toward the axle center of the stator core, and described in whole
Sonic transducer is arranged at equal intervals around the outside diameter of the stator core；The output end of the audio-frequency amplifier and first journey
Control the input terminal communication connection of amplifier；The output end of first programmable amplifier and the input terminal of the frequency overlapped-resistable filter
Communication connection；The input terminal of the output end of the frequency overlapped-resistable filter and second programmable amplifier communicates to connect；Described
The input terminal of the output end of two programmable amplifiers and the analog-digital converter communicates to connect；The output end of the analog-digital converter with
First communication ends of the dsp processor communicate to connect.
The utility model collects noise signal when stator core operation by the high acoustic sensor array of directionality, then
The noise signal of acquisition is amplified and is filtered the audio signal after being denoised, then the modulus for passing through high-speed, high precision
After converter converts audio signals into electric signal, it is input to dsp processor and carries out obtaining audible spectrum data, solve current
Lack one kind effectively noise signal of acquisition stator core in industry and generates corresponding frequency spectrum data to test and analyze stator core
The device of situation is loosened, the caused technology using noise measuring stator core is difficult in actual stator core detection engineering
Widely available technical problem.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram of generator stator core detection device provided by the utility model；
Fig. 2 is a kind of structural schematic diagram of generator stator core detection system provided by the utility model；
Wherein, appended drawing reference is as follows；
1, sonic transducer；2, audio-frequency amplifier；3, the first programmable amplifier；4, frequency overlapped-resistable filter；5, it second program-controlled puts
Big device；6, analog-digital converter；7, dsp processor；8, communication chip；9, memory；10, human-computer interaction device；A, audio collection
Module；A, stator core；B, generator stator core detection device；C, back-stage management terminal.
Specific embodiment
The utility model embodiment discloses a kind of generator stator core detection device and system, for solving current line
Lack one kind effectively noise signal of acquisition stator core in the industry and generate corresponding frequency spectrum data, for testing and analyzing stator core
The device of situation is loosened, the caused technology using noise measuring stator core is difficult in actual stator core detection engineering
Widely available technical problem.
Fig. 1 and Fig. 2 are please referred to, a kind of generator stator core detection device is provided in the utility model embodiment, comprising:
Dsp processor 7 and at least two audio collection module a；
Audio collection module a is specifically included: sonic transducer 1, audio-frequency amplifier 2, the first programmable amplifier 3, anti-aliasing filter
Wave device, the second programmable amplifier 5 and analog-digital converter 6；
The output end of sonic transducer 1 is connect with the input terminal of audio-frequency amplifier 2, and the collection terminal of sonic transducer 1 is directed toward stator
The axle center of iron core A, and whole sonic transducers 1 are arranged at equal intervals around the outside diameter of stator core A；
The communication connection of the input terminal of the output end of audio-frequency amplifier 2 and the first programmable amplifier 3；
The output end of first programmable amplifier 3 and the input terminal of frequency overlapped-resistable filter communicate to connect；
The communication connection of the input terminal of the output end of frequency overlapped-resistable filter 4 and the second programmable amplifier 5；
The output end of second programmable amplifier 5 and the input terminal of analog-digital converter 6 communicate to connect；
The output end of analog-digital converter 6 and the first communication ends of dsp processor 7 communicate to connect.
It should be noted that the audio signal generated when stator core A running is obtained by sonic transducer 1 first, due to
The audio signal of sensor acquisition is smaller and contains more noise, cannot be directly used to generate audible spectrum data, need pair
Audio signal is handled, and is first passed through audio-frequency amplifier 2 and is amplified noise-containing audio signal, wherein audio-frequency amplifier 2 is by transporting
Road composition is put back to, conditioning amplification is carried out to noise-containing audio signal using the dedicated amplification chip of audio；
Amplify noise-containing audio signal by 2 multiple (1,2,4,8,16) by the first programmable amplifier 3；
Amplified audio signal is input to frequency overlapped-resistable filter 4, for reducing the noise in audio signal, Yi Jifang
Only higher than sample frequency half signal generate aliasing and caused by error；
Filtered audio signal is input to second level programmable amplifier, amplifies filter by 2 multiple (1,2,4,8,16)
Audio signal after wave will amplify filtered audio signal by analog-digital converter 6 and be converted into electric signal, and is input to DSP
Audible spectrum data are generated in processor 7；
Wherein, dsp processor 7 also serves as the main control unit for the generator stator core detection device that the present embodiment refers to.
Further, anti-aliasing filter implement body is made of the cascade of at least two low-pass filters；
It should be noted that the low-pass filtering link in frequency overlapped-resistable filter 4 is used to filter out the high fdrequency component in signal.Letter
Inevitable that high-frequency interferencing signal is mingled in useful signal in number collection process.In order to make the frequency of these signals
The range for meeting nyquist sampling theorem defined, some neutral signals for removing acquisition are done caused by useful signal
It disturbs, and farthest suppresses or eliminates the influence that aliasing acquires data, it is necessary to first with this low-pass filter
Decayed to garbage signal and is filtered out.Frequency overlapped-resistable filter 4 is in addition to the decaying to garbage signal and filters out, and can also be ADC
The transient energy that conversion generates provides buffering；
In the present embodiment, frequency overlapped-resistable filter 4 uses third octave filter, carries out in total to 31 groups of centre frequencies
Measurement: 20,25,31.5,40,50,63,80,100,125,160,200,250,315,400,500,630,800,1k, 1.25k,
1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k, unit Hz；
Frequency overlapped-resistable filter 4 can use passive low-pass filter, and simplest is single order RC low-pass filter.Or
Active filter is formed using operational amplifier plus RC network.If selecting second-order low-pass filter, operation amplifier can be used
Device adds RC network to form active filter.If selecting high-order low-pass filter.Low-pass filter integrated circuit can be selected,
This is without limitation.
Further, sonic transducer 1 is specially electret capacitor type sonic transducer；
It should be noted that electret capacitor type sonic transducer is mainly passed by the capacitor that electret provides polarizing voltage
Sound device cartridge and dedicated field-effect tube two are grouped as.Electret is to inject charge into material at high temperature and pressure, shape
At " inlaying " charge, and the chemical material that one of is permanently stored in material.In recent years, the development of electret is with poly-
Propylene PP honeycomb film (polyp ropylene cellular) and polytetrafluoroethylene PTFE perforated membrane (porous
Politetrafluor oethy2lene) it is representative.Between electret film and metal polar plate with thin insulation lining ring every
It opens.In this way, just forming a capacitor between diaphragm and metal polar plate.When sound wave effect causes vibration in electret diaphragm, make
The capacitor obtained between diaphragm and metal polar plate changes, to produce the transfiguration voltage for changing with sound wave and changing.Electret
Capacitance between diaphragm and metal polar plate is smaller, generally only tens pF, reachable in its low frequency end (such as 20Hz) output impedance
Hundreds of megaohms or more.Therefore, it cannot directly be connected with amplifying circuit, it is necessary to connect impedance transformer, usually specially with one
The field-effect tube used is as impedance transformer.The dedicated field-effect tube of electret is known as microphone pipe, is generally imitated using junction type field
Answer transistor input impedance high, and the low characteristic of output impedance plays interface circuit in acoustic-electric conversion process.
The basic functional principle of electret acoustic sensor 1 can be illustrated with most common plane-parallel capacitor.Two pieces
The metal polar plate being parallel to each other, when not considering that (electric force lines distribution of 2 pole plate edges unevenly causes capacitor for its edge effect
The variation of amount) when, capacitance is
C=ε S/d=εrε0S/d (1)；
In formula (1): d is the distance between two parallel plate electrodes, unit m；S is the significant surface that two parallel plate electrodes mutually cover
Product, unit m2；The dielectric constant of ε medium between pole plate；εrFor the relative dielectric constant of medium；ε0It is normal for vacuum absolute dielectric
Number.
Since capacitor charging charge amount is Q, both ends polarizing voltage is V0, capacitor C0(Q=C0V0), work as acoustical signal
When acting on electret, diaphragm vibration makes capacitance change, Δ C, because Q is constant, after acoustic pressure effect, diaphragm vibration causes capacitor to become
Change amount is just changed into voltage variety Δ Vt.Therefore, microphone exports alternating voltage.
For the complex electromagnetic environment application of large-scale generator scene, the sonic transducer 1 of use preferably has following main performance
Feature:
1, worn-out technology is shielded using UniGuard radio frequency interference (RFI), prevents radio frequency interference, inhibit the noise on environment periphery；
2, it is designed using the micropore of " the Temple of Heaven Echo Wall " principle, accurately calculates sound reflection angle and reach best；
3, the serious echo that spacious room is effectively reduced using echo cancellor cavity provides clear and high-quality audio signal
Output；
4, using Dolby Pro-logic system, built-in high speed voice processing unit, the processing of two-stage DNR dynamic noise reduction；
5, the large-scale gold-plated shake membrane capacitance microphone of U.S. KaBoni, high-fidelity, highly sensitive, low noise in 150 squares；
6, built-in AGC and DTS de-noising signal micro-processor interface circuit automatically adjusts high-intensitive sound and moment impact sound；
7, built-in newest DNP and DSP digital processing element, thoroughly eliminate " hissing " electronic noise；
8, lightning strike protection, protection to error-polarity connection of power supply built in sound pick-up, electrostatic protection and power source protective module；
9, overlength audio signal transmission technology, it is undistorted using 3 kilometers of RVVP3 × 0.5mm2 shielded cable transmission；
10, the superpower environment temperature suitable for -20 DEG C~70 DEG C works；
11, professional front audio amplifying circuit is integrated；
12, meet RoHS specification, the hazardous substances constructively without containing European Union's disabling；
13, pass through European Union CE standard, U.S. FCC certification and Supreme Procuratorate's synchronization video recording system construction specification；
For the sonic transducer 1 used in the present embodiment for COTT-C7 high-fidelity sound pick-up, specific sensor model number can be with
Other satisfactory models are needed replacing according to user, are not specifically limited herein.
Further, dsp processor 7 is specially TMS320F2812 chip.
Further, further includes: communication chip 8；
The control terminal of communication chip 8 and the second communication ends of dsp processor 7 communicate to connect.
Wherein, the communication chip that the present embodiment uses is integrated at least one in wireless communication interface or wired communication interface
Kind.
Further include: memory 9 and human-computer interaction device 10；
The third communication end of memory 9 and dsp processor 7 communicates to connect；
The control terminal of human-computer interaction device 10 and the fourth communication end of dsp processor 7 communicate to connect.
Wherein, memory 9 is used to save the audible spectrum data obtained by dsp processor 7, passes through man-machine friendship after reading
Mutual equipment 10 is shown, carries out preliminary analysis for the loosening state to stator core A.
The utility model embodiment collects noise when stator core A operation by high 1 array of sonic transducer of directionality
Then signal amplifies and is filtered the audio signal after being denoised to the noise signal of acquisition, then high by high speed
After the analog-digital converter 6 of precision converts audio signals into electric signal, it is input to dsp processor 7 and carries out obtaining audible spectrum number
According to solving current line and lack the noise signal of effectively acquisition stator core A a kind of in the industry and generate corresponding frequency spectrum data to examine
The device that analysis stator core A loosens situation is surveyed, the caused technology using noise measuring stator core A is in actual stator iron
Widely available technical problem is difficult in heart A detection engineering.
The above are a kind of retouching in detail for one embodiment of generator stator core detection device provided by the utility model
It states, here is a kind of detailed description of one embodiment of generator stator core detection system provided by the utility model.
Referring to Fig. 2, the utility model embodiment provides a kind of generator stator core detection system, comprising: backstage
The generator stator core detection device B that management terminal C and above-described embodiment refer to；
The back-stage management terminal C passes through the communication chip 8 and the hair in the generator stator core detection device
Electric machine stator iron detection device B communication connection；
It should be noted that the audible spectrum data that generator stator core detection device B is obtained can be by communicating core
Piece 8 is passed to the Generator Status diagnostic data base in back-stage management terminal C, can carry out complete contrast using diagnosing software system
Analysis, wherein it includes: the on-line monitoring analysis of TN8000 unit vibration that generator stator core state analysis diagnostic software, which can be used,
Fault diagnosis system or W-PD6/W-PD60 generator partial discharge on-line monitoring system.
Detailed Jie has been carried out to a kind of generator stator core detection device provided by the utility model and system above
It continues, for those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in specific embodiment and applies model
Place that there will be changes, in conclusion the content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. a kind of generator stator core detection device characterized by comprising dsp processor and at least two audio collections
Module；
The audio collection module specifically includes: sonic transducer, audio-frequency amplifier, the first programmable amplifier, frequency overlapped-resistable filter,
Second programmable amplifier and analog-digital converter；
The output end of the sonic transducer is connect with the input terminal of the audio-frequency amplifier, and the collection terminal of the sonic transducer is directed toward
The axle center of the stator core, and all the sonic transducer is arranged at equal intervals around the outside diameter of the stator core；
The input terminal of the output end of the audio-frequency amplifier and first programmable amplifier communicates to connect；
The output end of first programmable amplifier and the input terminal of the frequency overlapped-resistable filter communicate to connect；
The input terminal of the output end of the frequency overlapped-resistable filter and second programmable amplifier communicates to connect；
The output end of second programmable amplifier and the input terminal of the analog-digital converter communicate to connect；
First communication ends of the output end of the analog-digital converter and the dsp processor communicate to connect.
2. a kind of generator stator core detection device according to claim 1, which is characterized in that the anti-aliasing filter
Implement body is made of the cascade of at least two low-pass filters.
3. a kind of generator stator core detection device according to claim 1, which is characterized in that the sonic transducer tool
Body is electret capacitor type sonic transducer.
4. a kind of generator stator core detection device according to claim 1, which is characterized in that the dsp processor
Specially TMS320F2812 chip.
5. a kind of generator stator core detection device according to claim 4, which is characterized in that further include: communication core
Piece；
The control terminal of the communication chip and the second communication ends of the dsp processor communicate to connect.
6. a kind of generator stator core detection device according to claim 5, which is characterized in that further include: memory
And human-computer interaction device；
The third communication end of the memory and the dsp processor communicates to connect；
The fourth communication end of the control terminal of the human-computer interaction device and the dsp processor communicates to connect.
7. a kind of generator stator core detection system characterized by comprising back-stage management terminal and such as claim 1 to 6
The generator stator core detection device；
The back-stage management terminal is determined by the communication chip in the generator stator core detection device with the generator
Sub- iron core detection device communication connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820992678.6U CN208607331U (en) | 2018-06-26 | 2018-06-26 | A kind of generator stator core detection device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820992678.6U CN208607331U (en) | 2018-06-26 | 2018-06-26 | A kind of generator stator core detection device and system |
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ID=65665164
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069013A (en) * | 2019-03-19 | 2019-07-30 | 广东电网有限责任公司 | A kind of Advanced Process control method and device |
| CN110208848A (en) * | 2019-06-20 | 2019-09-06 | 中国长江电力股份有限公司 | Detection device of metal foreign body between a kind of generator stator-rotator |
| CN113654649A (en) * | 2021-08-18 | 2021-11-16 | 中车株洲电机有限公司 | Motor vibration monitoring device |
-
2018
- 2018-06-26 CN CN201820992678.6U patent/CN208607331U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069013A (en) * | 2019-03-19 | 2019-07-30 | 广东电网有限责任公司 | A kind of Advanced Process control method and device |
| CN110069013B (en) * | 2019-03-19 | 2022-03-29 | 广东电网有限责任公司 | High-order process control method and device |
| CN110208848A (en) * | 2019-06-20 | 2019-09-06 | 中国长江电力股份有限公司 | Detection device of metal foreign body between a kind of generator stator-rotator |
| CN113654649A (en) * | 2021-08-18 | 2021-11-16 | 中车株洲电机有限公司 | Motor vibration monitoring device |
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Effective date of registration: 20200114 Address after: 510000 room 501-503, annex building, Huaye building, No.1-3, Chumo new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province Patentee after: Guangdong Electric Power Research Institute of energy technology limited liability company Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Co-patentee before: Guangdong Electric Power Research Institute of energy technology limited liability company Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. |
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Address after: Room 501-503, annex building, Huaye building, No.1-3 Chuimao new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee after: China Southern Power Grid Power Technology Co.,Ltd. Address before: Room 501-503, annex building, Huaye building, No.1-3 Chuimao new street, Xihua Road, Yuexiu District, Guangzhou City, Guangdong Province 510000 Patentee before: GUANGDONG ELECTRIC POWER SCIENCE RESEARCH INSTITUTE ENERGY TECHNOLOGY Co.,Ltd. |