CN201111891Y - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- CN201111891Y CN201111891Y CNU2007200923021U CN200720092302U CN201111891Y CN 201111891 Y CN201111891 Y CN 201111891Y CN U2007200923021 U CNU2007200923021 U CN U2007200923021U CN 200720092302 U CN200720092302 U CN 200720092302U CN 201111891 Y CN201111891 Y CN 201111891Y
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- CN
- China
- Prior art keywords
- signal
- noise
- converter
- acceleration
- probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model discloses a sound attenuation device which comprises a feed forward probe used for acquiring sound source amplitude, acceleration and phase signals of noise, an A/D converter, an amplifier, a data processor and a voice generator, wherein, a signal output end of the feed forward probe is connected with a simulation signal input end of the A/D converter; a digital signal output end of the A/D converter is connected with an input end of the amplifier; an output end of the amplifier is connected with a feed forward signal input end of the data processor the output end of which is connected with an input end of the voice generator. The feed forward probe transforms acquired signals into electrical signals to be sent to the A/D converter for being converted into digital signals; then the amplifier amplifies the digital signals to be calculated in the data processor to obtain the signals with the same amplitude and acceleration and opposite phases; then the signals are conveyed to the voice generator for the purpose of giving off sound waves with the same amplitude and acceleration as a noise source and opposite phases and the sound waves are overlaid with an original acoustic field to reduce the intensity of the original acoustic field and then reduce the original noise level. Meanwhile, the sound attenuation device has the advantages of simple structure, convenient maintenance, little occupying area and effective noise reduction.
Description
Technical field
The utility model relates to the noise elimination technique of equipment and system, relates in particular to a kind of noise-abatement equipment at oil field rock gas gas injection plant and the noise abatement of water-injection plant system equipment.
Background technology
At present, the effective measures that reduce noise are with acoustic hood machine to be shielded, noise when some pressurized equipments such as oil field rock gas gas injection plant and the operation of water-injection plant system is very big, can reach 99-104dB (A), has had a strong impact on operating personnel's execute-in-place and has polluted near the acoustic environment of equipment.Conventional acoustic hood, its version is single, and floor area is big, and maintenance, to make an inspection tour the space narrow and small, is difficult to the dismounting maintenance, affects the scope of application of acoustic hood to a certain extent.
The utility model content
The purpose of this utility model provide a kind ofly do not take up an area of face, noise-abatement equipment is easily overhauled in simple in structure, dismounting.
A kind of noise-abatement equipment, wherein: it comprises feedforward probe, feed-forward signal A/D converter, amplifier, data processor, the acoustical generator that is used for acquisition noise sound source amplitude, acceleration, phase signal, wherein, the signal output part of feedforward probe connects the input end of analog signal of feed-forward signal A/D converter, the digital signal output end of feed-forward signal A/D converter connects amplifier input terminal, the output terminal of amplifier connects the feed-forward signal input end of data processor, and the output terminal of data processor connects the input end of acoustical generator.
Described noise-abatement equipment, wherein: this noise-abatement equipment also comprises feedback probe and the feedback signal A/D converter that is used to gather stack back sound field amplitude, acceleration, phase signal, the signal output part of feedback probe connects the input end of analog signal of feedback signal A/D converter, the digital signal output end that the digital signal output end of feedback signal A/D converter connects the feed-forward signal A/D converter connects amplifier input terminal, and the output terminal of amplifier connects the feedback signal input end of data processor.
Described noise-abatement equipment, wherein: described feedforward probe is surveyed three-in-one probe for amplitude, acceleration, phase signal.
Described noise-abatement equipment, wherein: described feedback probe is surveyed three-in-one probe for amplitude, acceleration, phase signal.
Described noise-abatement equipment, wherein: described data processor is dsp chip or single-chip microcomputer.
The utility model adopts technique scheme will reach following technique effect:
Noise-abatement equipment of the present utility model, its feedforward probe becomes electric signal with amplitude, acceleration, the phase place of noise source in the original sound field that collects and sends into the feedforward A/D converter and be converted to digital signal, amplifier is sent in the data processor after this digital signal is amplified, after in data processor, passing through sequential operation, with same-amplitude, acceleration and the opposite signal of phase place is sent to acoustical generator, produce sound wave identical with former noise source amplitude, that acceleration is identical, phase place is opposite, with original sound field stack, cut down original sound field intensity, reduce original noise figure.For improving control accuracy, feedback probe, feedback a/d converter also can be set, amplitude, acceleration, phase signal that stack weakens in the sound field of back are surveyed, be sent to data processor through amplifier, error of calculation value is further adjusted amplitude, acceleration, the phase number of output, forms feedback, raising further reduces sound field intensity to the control accuracy of amplitude, acceleration, phase number.The utility model is simple in structure, is easy to safeguard, does not take up an area of face, through test, the noise in 100 ~ 500Hz scope can be reduced 35dB.
Description of drawings
Fig. 1 is the circuit block diagram of noise-abatement equipment.
Embodiment
Embodiment:
A kind of noise-abatement equipment, its circuit as shown in Figure 1, it comprises three-in-one feedforward probe, feed-forward signal A/D converter, amplifier, data processor (TMS320C8X), the acoustical generator that is used for acquisition noise sound source amplitude, acceleration, phase signal, also comprises the three-in-one feedback probe and the feedback signal A/D converter that are used to gather stack back sound field amplitude, acceleration, phase signal; Wherein, the feedforward probe is installed in the noise source place, with the noise source amplitude that detects, acceleration, phase signal is converted into electric signal, deliver to the corresponding input end of analog signal of feed-forward signal A/D converter through its signal output part, the feed-forward signal A/D converter is converted into digital signal, be delivered to amplifier input terminal through its digital signal output end, amplifier carries out signal after the processing and amplifying is delivered to data processor (TMS320C8X) through its output terminal feed-forward signal input end, (TMS320C8X) programmes to the data processor, this program can be with the noise source amplitude of feed-forward signal input end input, acceleration, phase signal, produce same-amplitude, acceleration and the opposite signal of phase place, the signal of this generation is delivered to acoustical generator through the data processor output terminal, driving it sends and the noise source amplitude, acceleration is identical and audio signal that phase place is opposite, with former noise sound field stack, thereby cut down original noise sound field intensity, reduce original noise figure.
Described feedback probe is arranged in the sound field after the stack, it surveys the amplitude of stack back sound field, acceleration, phase signal, be converted into electric signal, be converted to digital signal through the feedback signal A/D converter again, then send into and carry out processing and amplifying in the amplifier, again amplified signal is sent into the feedback signal input end of data processor (TMS320C8X), data processor (TMS320C8X) is according to the feedback signal of input, calculate the amplitude of original output signal, acceleration, phase data is to the error amount of the corresponding parameter of noise source signal, adjust the output signal of output terminal, form feedback, raising is to amplitude, acceleration, the control accuracy of phase number further reduces sound field intensity.After tested, noise can reduce 35dB in 100 ~ 500Hz scope.
The amplifier model that adopts in the present embodiment is MA201, it has two independently amplifying circuits, be used for respectively feed-forward signal, feedback signal being carried out processing and amplifying, handle after separately the output terminal correspondence deliver to feed-forward signal input end, the feedback signal input end of data processor (TMS320C8X).
It is that amplitude, acceleration, the phase signal of VM83 gathered three-in-one probe that feedforward probe and feedback probe adopt model respectively.
Claims (5)
1, a kind of noise-abatement equipment, it is characterized in that: it comprises feedforward probe, feed-forward signal A/D converter, amplifier, data processor, the acoustical generator that is used for acquisition noise sound source amplitude, acceleration, phase signal, wherein, the signal output part of feedforward probe connects the input end of analog signal of feed-forward signal A/D converter, the digital signal output end of feed-forward signal A/D converter connects amplifier input terminal, the output terminal of amplifier connects the feed-forward signal input end of data processor, and the output terminal of data processor connects the input end of acoustical generator.
2, noise-abatement equipment as claimed in claim 1, it is characterized in that: this noise-abatement equipment also comprises feedback probe and the feedback signal A/D converter that is used to gather stack back sound field amplitude, acceleration, phase signal, the signal output part of feedback probe connects the input end of analog signal of feedback signal A/D converter, the digital signal output end that the digital signal output end of feedback signal A/D converter connects the feed-forward signal A/D converter connects amplifier input terminal, and the output terminal of amplifier connects the feedback signal input end of data processor.
3, noise-abatement equipment as claimed in claim 1 or 2 is characterized in that: described feedforward probe is surveyed three-in-one probe for amplitude, acceleration, phase signal.
4, noise-abatement equipment as claimed in claim 2 is characterized in that: described feedback probe is surveyed three-in-one probe for amplitude, acceleration, phase signal.
5, noise-abatement equipment as claimed in claim 1 or 2 is characterized in that: described data processor is dsp chip or single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200923021U CN201111891Y (en) | 2007-10-22 | 2007-10-22 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200923021U CN201111891Y (en) | 2007-10-22 | 2007-10-22 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201111891Y true CN201111891Y (en) | 2008-09-10 |
Family
ID=39963634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200923021U Expired - Fee Related CN201111891Y (en) | 2007-10-22 | 2007-10-22 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201111891Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101751918B (en) * | 2008-12-18 | 2012-04-18 | 李双清 | Novel silencer and noise reduction method |
| CN102944215A (en) * | 2012-11-26 | 2013-02-27 | 昆山北极光电子科技有限公司 | Multi-channel mechanical deformation measuring method |
| CN104848432A (en) * | 2015-05-29 | 2015-08-19 | 东南大学 | Air purifier with active noise reduction device |
-
2007
- 2007-10-22 CN CNU2007200923021U patent/CN201111891Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101751918B (en) * | 2008-12-18 | 2012-04-18 | 李双清 | Novel silencer and noise reduction method |
| CN102944215A (en) * | 2012-11-26 | 2013-02-27 | 昆山北极光电子科技有限公司 | Multi-channel mechanical deformation measuring method |
| CN104848432A (en) * | 2015-05-29 | 2015-08-19 | 东南大学 | Air purifier with active noise reduction device |
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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: 20080910 Termination date: 20091123 |