CN203732155U - Vibration acoustic-detection spectrum-collection device based on technology of active noise reduction - Google Patents
Vibration acoustic-detection spectrum-collection device based on technology of active noise reduction Download PDFInfo
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- CN203732155U CN203732155U CN201320638762.5U CN201320638762U CN203732155U CN 203732155 U CN203732155 U CN 203732155U CN 201320638762 U CN201320638762 U CN 201320638762U CN 203732155 U CN203732155 U CN 203732155U
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000001228 spectrum Methods 0.000 claims abstract description 82
- 239000000523 sample Substances 0.000 claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 14
- 230000008054 signal transmission Effects 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 239000012212 insulator Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 230000003595 spectral effect Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
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Abstract
The utility model provides a vibration acoustic-detection spectrum-collection device based on the technology of active noise reduction, and the device is formed by that a vibration spectrum-collection probe (1) is connected with a spectrum processing apparatus (2) through a signal transmission cable (5). The spectrum processing apparatus (2) is also connected with a signal receiver (6). The beneficial effects of the utility model comprise that the device provided by the utility model is provided with the vibration spectrum-collection probe (1) for vibration acoustic detection in a high-noise environment; the device can achieve the collection of vibration signals under the condition of higher environment noise and obtain more accurate vibration data, and can provide a reliable data source toe the later analysis of the vibration data, thereby improving the accuracy of detection results.
Description
Technical field
The utility model relates to a kind of rumble spectrum harvester, and especially a kind of vibroacoustics detects uses rumble spectrum harvester.
Background technology
In the detection that adopts vibroacoustics method to carry out, the collection of rumble spectrum is generally to adopt rumble spectrum acquisition probe to carry out the collection of rumble spectrum as acceleration transducer, and rumble spectrum is converted to and recycles spectrum analysis software after electric signal and show and analyze.Because the frequency spectrum acquisition probe such as acceleration transducer are very sensitive to vibration, once there be the generation of vibration in measurement range, no matter be the vibration of object to be detected itself or the vibration that neighbourhood noise causes, will catch by collected probe, and be converted to vibration signal.In actual testing, residing testing environment is difficult to reach the absolute perfect condition without extraneous vibration, especially in a large amount of strong neighbourhood noise in the situation that, neighbourhood noise may cause the direct vibration of acquisition probe, make testing result occur the vibration signal of non-tested object, affect the accurate judgement of testing result.
In order to solve the impact of strong neighbourhood noise on testing result, the utility model has designed a kind of vibroacoustics detection rumble spectrum harvester, the impact for reducing neighbourhood noise on testing result.
Frequency spectrum processing device in the utility model has comprised the active noise reduction technology in existing noise signal processing.The principle of active noise reduction technology is: all sound is all made up of certain frequency spectrum, if can find a kind of sound, its frequency spectrum is just the same with the noise that will eliminate, and just just contrary (differing 180 °) of phase place, just can balance out this noise completely.The crucial sound that is just how to obtain that counteracting noise.The actual way adopting is: set about from noise source itself, manage by electronic circuit, the phase place of former noise to be turned around.Active noise reduction technology adopts so a kind of mode exactly.
Utility model content
The purpose of this utility model is to be to avoid environment that vibroacoustics detection rumble spectrum harvester under a kind of strong neighbourhood noise is provided.
The utility model solves the technical scheme that its technical matters adopts:
Detect frequency spectrum harvester based on the vibroacoustics of active noise reduction technology, the utility model feature is, connected and composed by signal transmission cable and frequency spectrum processing device by rumble spectrum acquisition probe, and frequency spectrum processing device is also connected with signal receiver.
The utility model rumble spectrum acquisition probe is made up of the probe of two specifications of the same race, comprise that one for gathering the probe of tested object rumble spectrum, for gathering the probe of neighbourhood noise frequency spectrum, two probes lean against layout with another, and probe detection faces is towards the opposite.
The utility model is provided with damping material between two probes of rumble spectrum acquisition probe, eliminates two vibration effects that probe is mutual.
Rumble spectrum and neighbourhood noise frequency spectrum that the utility model frequency spectrum processing device gathers for receiving rumble spectrum probe, and noise spectrum is carried out to real-time operation, noise spectrum phase place after computing is contrary with the noise spectrum of collection, be 180 ° of phase phasic differences, then the noise spectrum after anti-phase and rumble spectrum are carried out to phase place and amplitude compose operation, and export the new frequency spectrum after computing.
Rumble spectrum and neighbourhood noise frequency spectrum that frequency spectrum processing device in the utility model gathers for receiving rumble spectrum probe, utilize control circuit to carry out real-time operation to neighbourhood noise frequency spectrum, noise spectrum phase place after computing is contrary with the noise spectrum of collection, i.e. 180 ° of noise spectrum vibration frequency phase phasic differences on the noise spectrum phase place of same time point and former this time point on time shaft, then the noise spectrum after anti-phase and rumble spectrum are carried out to phase place and amplitude compose operation, so just eliminated noise and object vibration has been detected to the impact bringing.
The key issue that this utility model solves:
The impact that to be mainly noise detect vibroacoustics of the mechanism of this utility model is the rumble spectrum that has not only comprised tested object when detecting except the rumble spectrum gathering, the noise spectrum that also probe collects, noise spectrum can affect the accurate judgement to testing result.Real-time noise frequency spectrum while utilizing another one to pop one's head in special acquisition testing, carries out 180 ° of reversions by spectral phase, more synthetic with rumble spectrum, just the neighbourhood noise part in rumble spectrum can be eliminated, and reduces the impact of noise on testing result.
The useful result of this utility model: this utility model has designed vibroacoustics detection rumble spectrum acquisition probe under a kind of strong neighbourhood noise, can realize the collection of the vibration signal under the stronger condition of neighbourhood noise, obtain vibration data comparatively accurately, and for the subsequent analysis of vibration data provides reliable Data Source, thereby the accuracy of raising testing result.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Brief description of the drawings
Fig. 1 is overall connection diagram of the present utility model.
Fig. 2 is sonde configuration schematic diagram of the present utility model.
In figure: 1. rumble spectrum acquisition probe, 2. frequency spectrum processing device, 3. probe is visited side, 4. damping material, 5. signal transmission cable, 6. signal receiver, 7. support insulator.
Embodiment
The utility model is connected and composed by signal transmission cable 5 and frequency spectrum processing device 2 by rumble spectrum acquisition probe 1, and frequency spectrum processing device 2 is also connected with signal receiver 6.
The utility model rumble spectrum acquisition probe 1 is made up of the probe of two specifications of the same race, comprise that one for gathering the probe of tested object rumble spectrum, for gathering the probe of neighbourhood noise frequency spectrum, two probes lean against layout with another, and probe detection faces 3 is towards the opposite.
The utility model is provided with damping material 4 between two probes of rumble spectrum acquisition probe 1.
In Fig. 1, rumble spectrum acquisition probe 1 is fixed on support insulator 7 lower flanges, probe A side detection faces 3 is firmly affixed on ring flange, comprise neighbourhood noise frequency spectrum for the rumble spectrum frequency spectrum that gathers support insulator generation, the neighbourhood noise frequency spectrum that probe B side detection faces 3 is propagated for gathering surrounding air, the spectrum signal that rumble spectrum acquisition probe 1 gathers transfers to frequency spectrum processing device 2 by signal transmission cable 5, the noise signal that treating apparatus collects probe B side detection faces 3 is carried out anti-phase calculation process, noise spectrum after computing and 180 ° of former noise spectrum phase phasic differences, and then carry out compose operation with phase place and the amplitude of rumble spectrum, and synthesize result to signal receiver 6 by signal transmission cable 5 outputs.
In Fig. 2, rumble spectrum acquisition probe 1 is made up of two same probe A, B.2 probes arrange back-to-back, and detection faces 3 is towards the opposite, and the damping material 4 that damping property is good is housed between two probes, and probe A, B side respectively have a signal transmission cable 5 for transmission spectrum signal.
Claims (2)
1. the vibroacoustics based on active noise reduction technology detects frequency spectrum harvester, it is characterized in that, connected and composed by signal transmission cable (5) and frequency spectrum processing device (2) by rumble spectrum acquisition probe (1), frequency spectrum processing device (2) is also connected with signal receiver (6); Described rumble spectrum acquisition probe (1) is made up of the probe of two specifications of the same race, comprise that one for gathering the probe of tested object rumble spectrum, for gathering the probe of neighbourhood noise frequency spectrum, two probes lean against layout with another, and probe detection faces (3) is towards the opposite.
2. the vibroacoustics based on active noise reduction technology according to claim 1 detects frequency spectrum harvester, it is characterized in that, between two probes of rumble spectrum acquisition probe (1), is provided with damping material (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320638762.5U CN203732155U (en) | 2013-10-16 | 2013-10-16 | Vibration acoustic-detection spectrum-collection device based on technology of active noise reduction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320638762.5U CN203732155U (en) | 2013-10-16 | 2013-10-16 | Vibration acoustic-detection spectrum-collection device based on technology of active noise reduction |
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| Publication Number | Publication Date |
|---|---|
| CN203732155U true CN203732155U (en) | 2014-07-23 |
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| CN201320638762.5U Expired - Lifetime CN203732155U (en) | 2013-10-16 | 2013-10-16 | Vibration acoustic-detection spectrum-collection device based on technology of active noise reduction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597093A (en) * | 2016-11-28 | 2017-04-26 | 深圳供电局有限公司 | Method and system for identifying transmission of vibration spectrum information in all spans between power transmission lines |
| CN104913355B (en) * | 2015-06-29 | 2017-10-27 | 珠海格力电器股份有限公司 | Noise treatment system, the method and device of range hood |
| CN115236726A (en) * | 2022-07-22 | 2022-10-25 | 中国地质调查局自然资源综合调查指挥中心 | Earthquake single-point acquisition equipment for active noise reduction |
-
2013
- 2013-10-16 CN CN201320638762.5U patent/CN203732155U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913355B (en) * | 2015-06-29 | 2017-10-27 | 珠海格力电器股份有限公司 | Noise treatment system, the method and device of range hood |
| CN106597093A (en) * | 2016-11-28 | 2017-04-26 | 深圳供电局有限公司 | Method and system for identifying transmission of vibration spectrum information in all spans between power transmission lines |
| CN106597093B (en) * | 2016-11-28 | 2018-11-13 | 深圳供电局有限公司 | It is a kind of identification each span of transmission line of electricity between transmit vibration spectrum information method and system |
| CN115236726A (en) * | 2022-07-22 | 2022-10-25 | 中国地质调查局自然资源综合调查指挥中心 | Earthquake single-point acquisition equipment for active noise reduction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |