CN202305005U - Device for coherent separation of noise of direct current converter station equipment - Google Patents
Device for coherent separation of noise of direct current converter station equipment Download PDFInfo
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- CN202305005U CN202305005U CN2010201439761U CN201020143976U CN202305005U CN 202305005 U CN202305005 U CN 202305005U CN 2010201439761 U CN2010201439761 U CN 2010201439761U CN 201020143976 U CN201020143976 U CN 201020143976U CN 202305005 U CN202305005 U CN 202305005U
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- 238000000926 separation method Methods 0.000 title claims abstract description 10
- 230000001427 coherent effect Effects 0.000 title abstract description 10
- 238000009413 insulation Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 abstract description 11
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The utility model discloses a device of direct current converter station equipment noise coherent separation sets up a transaudient device and a laser vibrometer respectively outside equipment to be tested, measure equipment to be tested's noise signal and vibration signal respectively through transaudient device and laser vibrometer to carry out coherence analysis to it through the computer, the noise of frequency department that is great at the coherent value is produced by this equipment during operation promptly, the noise of frequency department that is little (if, be less than 0.8 under given confidence) at the coherent value is not aroused by this equipment to be tested's vibration. The utility model can remotely measure the vibration and noise of the tested equipment without contacting with the tested equipment, thereby avoiding high-voltage danger and ensuring the safety of the instrument; and the noise spectrum and the noise magnitude of a certain device can be separated from a complex place where a plurality of devices commonly radiate noise by utilizing the coherence between vibration and noise.
Description
Technical field
The utility model relates to the relevant separation technology field of noise, is specifically related to the relevant device that separates of a kind of noise of equipment of direct-current convertor station.
Background technology
HVDC converter substation (hereinafter to be referred as current conversion station) is the place that a kind of strong noise is polluted, and the noise of each equipment is the major measure of preventing and treating noise pollution in the control current conversion station.When the opertaing device noise, must know the size and the characteristics of each noise of equipment radiation, this just needs accurately to measure the noise of the independent radiation of each equipment.
In current conversion station, exist the equipment of number of different types; Even same kind equipment; The situation that also exists many equipment to move simultaneously; This just makes interferences that overlap mutually of noise in the HVDC converter substation, and the noise that any point place is measured around arbitrary equipment all is their superposition, sound field complicacy very in the current conversion station.At present, in order to measure the noise of each equipment of current conversion station, all adopt sound meter near each equipment, to carry out ordinary surveying.Because each equipment all has high voltage and do not allow near measurement, very easily receive other equipment operation interference of noise when far away again apart from equipment.
Therefore, the accurate noise of measuring a certain equipment is a very thing of difficulty in current conversion station.
The utility model content
The technical matters that the utility model will solve provides the relevant device that separates of a kind of noise of equipment of direct-current convertor station; Utilize the coherence between vibration and the noise, isolate the noise spectrum and the noise value of a certain equipment from the place of the common radiated noise of plurality of devices of complicacy.
For addressing the above problem, the technical scheme of the utility model is:
A kind of noise of equipment of direct-current convertor station phase dry separation device is characterized in that: include DC converter station noise equipment under test, said equipment under test the place ahead is provided with directive property sound-conducting apparatus and the laser vibration measurer that points to equipment under test; Equipment under test also is respectively arranged with anti alias filter, data acquisition unit and computing machine outward, and the output terminal of described sound-conducting apparatus and laser vibration measurer is connected in series anti alias filter, data acquisition unit and computing machine successively through lead.
Described noise of equipment of direct-current convertor station phase dry separation device is characterized in that described sound-conducting apparatus includes cup-shaped acoustic shell, and an end of said cup-shaped acoustic shell is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell is a sound insulation value preferred metal body, and the inwall of being close to cup-shaped acoustic shell is small-bore that closed end is equipped with one deck acoustic absorbant with it; Along cup-shaped acoustic shell axis line inside place amplifier is installed, an end of amplifier is fixedly connected with microphone, and the receiving plane of microphone is towards the heavy caliber openend of cup-shaped acoustic shell, and the other end of amplifier is imbedded in the acoustic absorbant and is connected to the lead of drawing.
A kind of noise of equipment of direct-current convertor station separation method that is concerned with is characterized in that: may further comprise the steps:
(1), spacing arranged outside DC converter station noise equipment under test a directive property sound-conducting apparatus and a laser vibration measurer be set respectively, and make the receiving end of directive property sound-conducting apparatus, laser vibration measurer emitted laser point to tested equipment of direct-current convertor station simultaneously;
(2), send during the equipment under test work that obtains by the directive property sound-conducting apparatus the vibration signal on the equipment under test surface that records of noise signal and laser vibration measurer respectively through filtering, and convert digital signal into and send into computing machine and carry out frequency spectrum computing and coherence analysis;
(3), COMPUTER CALCULATION draws the noise signal of the same equipment under test that sends and the coherence function value of vibration signal (promptly relevant frequency spectrum); The noise spectrum of more same equipment under test and relevant frequency spectrum; By relatively drawing the noise source conclusion: the noise at the big frequency place of coherent value is the noise that this equipment surface vibration is produced; Coherent value little (as, under given degree of confidence less than 0.8) the noise at frequency place be not that vibration by this equipment under test causes; That is to say that the noise at the big frequency place of coherent value is to be produced by this equipment under test work time, otherwise the noise at this frequency place just not to produce when being worked by this equipment under test.
The beneficial effect of the utility model:
The utility model need not to contact with equipment under test, and vibration and noise that can the telemeasurement equipment under test have avoided that Keep Clear-High Voltage, have ensured the safety of instrument; And utilize the coherence between vibration and the noise, can isolate the noise spectrum and the noise value of a certain equipment from the place of the common radiated noise of plurality of devices of complicacy.
Description of drawings
Fig. 1 is the utility model apparatus structure synoptic diagram, arrow points expression signal trend among the figure.
Fig. 2 is the utility model sound-conducting apparatus structural representation.
Embodiment
Referring to Fig. 1,2; A kind of noise of equipment of direct-current convertor station phase dry separation device; Include equipment under test 1, equipment under test 1 outer directive property sound-conducting apparatus 2 and the laser vibration measurer 3 of being respectively arranged with, directive property sound-conducting apparatus 2 includes cup-shaped acoustic shell 4; One end of cup-shaped acoustic shell 4 is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell 4 is a sound insulation value preferred metal body, and the inwall of being close to cup-shaped acoustic shell 4 is small-bore that closed end is equipped with one deck acoustic absorbant 5 with it; Along cup-shaped acoustic shell 4 axis line inside places amplifier 7 is installed; One end of amplifier 7 is fixedly connected with microphone 8; And the receiving plane of microphone 8 is towards the heavy caliber openend of cup-shaped acoustic shell 4, and the other end of amplifier 7 is imbedded in the acoustic absorbant 5 and is connected to the lead 6 of drawing; Equipment under test 1 outer anti alias filter 9, data acquisition unit 10 and the computing machine 11 of also being respectively arranged with, the output terminal of sound-conducting apparatus 2 and laser vibration measurer 3 is connected in series anti alias filter 9, data acquisition unit 10 and computing machine 11 successively through lead.
A kind of noise of equipment of direct-current convertor station separation method that is concerned with may further comprise the steps:
(1), spacing arranged outside equipment under test a directive property sound-conducting apparatus and a laser vibration measurer be set respectively, and make the heavy caliber openend of directive property sound-conducting apparatus, laser vibration measurer emitted laser point to tested equipment of direct-current convertor station simultaneously;
(2), send during the equipment under test work that obtains by the directive property sound-conducting apparatus the vibration signal on the equipment under test surface that records of noise signal and laser vibration measurer respectively through filtering, and convert digital signal into and send into computing machine and carry out frequency spectrum computing and coherence analysis;
(3), COMPUTER CALCULATION draws the noise signal of the same equipment under test that sends and the coherence function value of vibration signal (promptly relevant frequency spectrum); The noise spectrum of more same equipment under test and relevant frequency spectrum; By relatively drawing the noise source conclusion: the noise at the big frequency place of coherent value is the noise that this equipment surface vibration is produced; Coherent value little (as, under given degree of confidence less than 0.8) the noise at frequency place be not that vibration by this equipment under test causes; That is to say that the noise at the big frequency place of coherent value is to be produced by this equipment under test work time, otherwise the noise at this frequency place just not to produce when being worked by this equipment under test.
Claims (2)
1. noise of equipment of direct-current convertor station phase dry separation device is characterized in that: include DC converter station noise equipment under test, said equipment under test the place ahead is provided with directive property sound-conducting apparatus and the laser vibration measurer that points to equipment under test; Equipment under test also is respectively arranged with anti alias filter, data acquisition unit and computing machine outward, and the output terminal of described sound-conducting apparatus and laser vibration measurer is connected in series anti alias filter, data acquisition unit and computing machine successively through lead.
2. noise of equipment of direct-current convertor station phase dry separation device according to claim 1 is characterized in that described sound-conducting apparatus includes cup-shaped acoustic shell, and an end of said cup-shaped acoustic shell is bigbore openend, and the other end is small-bore closed end; The shell of cup-shaped acoustic shell is a sound insulation value preferred metal body, and the inwall of being close to cup-shaped acoustic shell is small-bore that closed end is equipped with one deck acoustic absorbant with it; Along cup-shaped acoustic shell axis line inside place amplifier is installed, an end of amplifier is fixedly connected with microphone, and the receiving plane of microphone is towards the heavy caliber openend of cup-shaped acoustic shell, and the other end of amplifier is imbedded in the acoustic absorbant and is connected to the lead of drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201439761U CN202305005U (en) | 2010-03-25 | 2010-03-25 | Device for coherent separation of noise of direct current converter station equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201439761U CN202305005U (en) | 2010-03-25 | 2010-03-25 | Device for coherent separation of noise of direct current converter station equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305005U true CN202305005U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201439761U Expired - Fee Related CN202305005U (en) | 2010-03-25 | 2010-03-25 | Device for coherent separation of noise of direct current converter station equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305005U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147983A (en) * | 2017-06-16 | 2017-09-08 | 白芯瑜 | The anti-tampering audiphone of one kind orientation |
-
2010
- 2010-03-25 CN CN2010201439761U patent/CN202305005U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107147983A (en) * | 2017-06-16 | 2017-09-08 | 白芯瑜 | The anti-tampering audiphone of one kind orientation |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20140325 |