CN201311777Y - Active destructive power source vibration noise device - Google Patents
Active destructive power source vibration noise device Download PDFInfo
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- CN201311777Y CN201311777Y CNU2008202290545U CN200820229054U CN201311777Y CN 201311777 Y CN201311777 Y CN 201311777Y CN U2008202290545 U CNU2008202290545 U CN U2008202290545U CN 200820229054 U CN200820229054 U CN 200820229054U CN 201311777 Y CN201311777 Y CN 201311777Y
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Abstract
The utility model relates to power equipment and provides an active destructive power source vibration noise device. The active destructive power source vibration noise device comprises an acoustic sensor, a phase-shifting circuit, a power-amplifier circuit, a loudspeaker, a switch and a power source, and is characterized in that the acoustic sensor is fixed in a power source cabin, an input end of the phase-shifting circuit is connected with a signal output end of the acoustic sensor, the input end of the power-amplifier circuit is connected with an output end of the phase-shifting circuit, the loudspeaker is connected with the output end of the power-amplifier circuit, and the switch is connected with the power source. The device can actively destruct the noises caused in active destructive engine cabins due to power source vibration and substantially weakens the outside environment influences caused by noises radiated in the operational process of automobiles and the like. According to experiments, low-frequency noises with 20 to 1 kHz of frequency bands are destructed, which can reach the 5 to 10 dB attenuation amount and substantially reduces the noises radiated in the operational process of automobiles and the like.
Description
Technical field
The utility model relates to a kind of power-equipment, especially relates to a kind of power source vibrating noise device that is used for initiatively subduing.
Background technology
The noise that power machinery product produced, very big with the work influence to people's daily life, automobile is along with vehicle acceleration, engine cylinder number minimizing etc., and the noise that engine produced is more outstanding.The engine of automobile etc. is positioned at the cabin mostly, make to have stronger sound pressure level in the nacelle, and engine noise repeatedly reflects to form very strong reverberant sound through the cabin internal face.In order to subdue noise, in nacelle, adopt passive noise reduction measures such as sound-absorbing and sound-proof material usually, its effect can only be subdued a certain amount of high frequency noise, and is limited to the low-frequency noise influence.
Summary of the invention
The purpose of this utility model is to influence problems such as comparatively serious at available dynamic source vibration noise, and a kind of power source vibrating noise device of initiatively subduing is provided.
The technical solution of the utility model is to install active noise-canceling system additional in power sources such as automobile (for example engine etc.) cabin.
The utility model is provided with sound transducer, phase-shift circuit, power amplification circuit, loudspeaker, switch and power supply.Sound transducer is fixed in the power source cabin, the signal output part of the input termination sound transducer of phase-shift circuit, and the output terminal of the input termination phase-shift circuit of power amplification circuit, loudspeaker connects the output terminal of power amplification circuit, and switch is connected with power supply.
Between sound transducer and phase-shift circuit, preferably establish signal amplification circuit, the signal output part of the input termination sound transducer of signal amplification circuit, the input end of the output termination phase-shift circuit of signal amplification circuit.Power supply can adopt vehicle power.
Sound transducer preferably is fixed in the power source cabin on the suspension, and near noise source.
Sound transducer can adopt moving-coil microphone or Electret condenser microphone.
The simple Analogical Electronics of the utility model utilization, the noise that will in power source (for example engine such as automobile) cabin, collect by sound transducer, after the amplification of forming by integrated circuit etc. of amplifier in the same way, pass to the phase-shift circuit of forming by integrated circuit etc., signal phase CONTROLLED POTENTIAL device can carry out the adjustment of 0～180 degree, signal after the phase shift carries out power amplification by integrated circuit, after loudspeaker broadcasts anti-phase noise, make positive and negative two kinds of living stacks of the single-shots of making an uproar in the cabin, cancel out each other, reduce the noise to radiation such as motor car engine thereby reach.
This shows that the utility model can initiatively be subdued the noise that nacelle internal cause power source vibration produces, make automobile etc. at the noise that operational process gave off, environmental impact has had one significantly to weaken to external world.According to experiment, subdue the low frequency noise that frequency range is 20～1kHz, can reach 5～10dB damping capacity, significantly reduced automobile etc. at noise that operational process gave off.
Description of drawings
Fig. 1 is the circuit composition frame chart of the utility model embodiment.
Fig. 2 is that the signal amplification circuit of the utility model embodiment and the circuit of phase-shift circuit are formed schematic diagram.
Fig. 3 is that the circuit of the power amplification circuit of the utility model embodiment is formed schematic diagram.
Embodiment
Referring to Fig. 1, the utility model is provided with sound transducer M, signal amplification circuit 1, phase-shift circuit 2, power amplification circuit 3, loudspeaker SP, K switch and power supply 4.Sound transducer M is fixed on the interior suspension of automotive engine compartment, and near noise source, the signal output part of the input termination sound transducer M of signal amplification circuit 1, the input end of the output termination phase-shift circuit 2 of signal amplification circuit 1, the output terminal of the input termination phase-shift circuit 2 of power amplification circuit 3, loudspeaker SP connects the output terminal of power amplification circuit 3, and K switch is connected with power supply 4.Power supply 4 adopts vehicle power.
Fig. 2 and 3 provides the circuit of the utility model embodiment and forms schematic diagram, integrated circuit (IC) 1-1 and auxiliary element are formed signal amplification circuit, auxiliary elements such as integrated circuit (IC) 1-2 and signal phase CONTROLLED POTENTIAL device Rw1 are formed phase-shift circuit, and integrated circuit (IC) 2 and auxiliary element are formed power amplification circuit.Below provide the reference model of each main devices in Fig. 2 and 3 and the parameter of main element.
Integrated circuit (IC) 1-1, IC1-2:LM358 type, IC2:TDA2822 type;
Resistance R 1:6.8k, R2:2.2k, R3:1K, R4, R5:39k, R6, R7, R9, R10, R14:10k, R8, R11, R12:5.6k, R13:3.9k, R15, R16:4.7 Europe;
Potentiometer Rw1:100k; Rw2:10K;
Capacitor C 1:10 μ F, C2:1 μ F, C3:47 μ F, C4:22n, C5, C9, C10:10 μ F, C6, C7:4.7 μ F, C8:1000 μ F, C11, C12:0.1 μ F;
Sound transducer M: moving-coil microphone or Electret condenser microphone.
Claims (5)
1. initiatively subdue power source vibrating noise device, it is characterized in that being provided with sound transducer, phase-shift circuit, power amplification circuit, loudspeaker, switch and power supply, sound transducer is fixed in the power source cabin, the signal output part of the input termination sound transducer of phase-shift circuit, the output terminal of the input termination phase-shift circuit of power amplification circuit, loudspeaker connects the output terminal of power amplification circuit, and switch is connected with power supply.
2. the power source vibrating noise device of initiatively subduing as claimed in claim 1, it is characterized in that between sound transducer and phase-shift circuit, establishing signal amplification circuit, the signal output part of the input termination sound transducer of signal amplification circuit, the input end of the output termination phase-shift circuit of signal amplification circuit.
3. the power source vibrating noise device of initiatively subduing as claimed in claim 1 is characterized in that power supply is a vehicle power.
4. the power source vibrating noise device of initiatively subduing as claimed in claim 1 is characterized in that sound transducer is fixed in the power source cabin on the suspension.
5. the power source vibrating noise device of initiatively subduing as claimed in claim 1 is characterized in that sound transducer is moving-coil microphone or Electret condenser microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202290545U CN201311777Y (en) | 2008-11-21 | 2008-11-21 | Active destructive power source vibration noise device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202290545U CN201311777Y (en) | 2008-11-21 | 2008-11-21 | Active destructive power source vibration noise device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201311777Y true CN201311777Y (en) | 2009-09-16 |
Family
ID=41109034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202290545U Expired - Fee Related CN201311777Y (en) | 2008-11-21 | 2008-11-21 | Active destructive power source vibration noise device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201311777Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104097743A (en) * | 2013-04-10 | 2014-10-15 | 中集海洋工程研究院有限公司 | Cabin physical model for ocean platform, acoustic characteristic research method and construction method |
| WO2017101067A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Ambient sound processing method and device |
| CN107346657A (en) * | 2016-05-05 | 2017-11-14 | 通用汽车环球科技运作有限责任公司 | Including with car audio bus（A2B）The vehicle of the clunk management system of interface |
-
2008
- 2008-11-21 CN CNU2008202290545U patent/CN201311777Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104097743A (en) * | 2013-04-10 | 2014-10-15 | 中集海洋工程研究院有限公司 | Cabin physical model for ocean platform, acoustic characteristic research method and construction method |
| WO2017101067A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Ambient sound processing method and device |
| CN107533839A (en) * | 2015-12-17 | 2018-01-02 | 华为技术有限公司 | A kind of processing method and equipment to surrounding environment sound |
| CN107533839B (en) * | 2015-12-17 | 2021-02-23 | 华为技术有限公司 | Method and device for processing ambient environment sound |
| US10978041B2 (en) | 2015-12-17 | 2021-04-13 | Huawei Technologies Co., Ltd. | Ambient sound processing method and device |
| CN107346657A (en) * | 2016-05-05 | 2017-11-14 | 通用汽车环球科技运作有限责任公司 | Including with car audio bus（A2B）The vehicle of the clunk management system of interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090916 Termination date: 20121121 |