CN110277084A - A kind of transformer silencer using active noise reduction - Google Patents
A kind of transformer silencer using active noise reduction Download PDFInfo
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- CN110277084A CN110277084A CN201910620070.XA CN201910620070A CN110277084A CN 110277084 A CN110277084 A CN 110277084A CN 201910620070 A CN201910620070 A CN 201910620070A CN 110277084 A CN110277084 A CN 110277084A
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- 230000009467 reduction Effects 0.000 title claims abstract description 44
- 230000003584 silencer Effects 0.000 title claims description 38
- 230000001133 acceleration Effects 0.000 claims abstract description 37
- 230000003044 adaptive effect Effects 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/125—Transformers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Vibration Prevention Devices (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The present invention provides a kind of transformer silencers using active noise reduction, wherein mainly including ICP acceleration transducer, signal conditioner, adaptive vibration active controller, power amplifier and vibration excitor.Vibration signal is detected by ICP acceleration transducer and is amplified, signal conditioner is the power supply of ICP acceleration transducer, and its vibration signal is improved into standard voltage signal, then vibration signal is transferred in adaptive vibration active controller, a real-time reversal of vibrations signal is exported to power amplifier, vibration excitor is driven to generate a frequency identical with amplitude, " the anti-vibration " of opposite in phase, it is offseted with " original is vibrated " that transformer generates, so that the vibration noise of transformer reduces, reach the Noise Reduction to transformer noise.
Description
Technical field
The present invention relates to silencer technology electronic equipment manufacturing field more particularly to a kind of transformers using active noise reduction
Silencer electronic equipment instrument.
Background technique
With domestic various regions Urbanization Progress, requirement of the resident to Electrical Safety, quality, economy is higher and higher, and transformation
Device, which is scattered, to focus mostly in downtown areas such as residential quarters, commercial center, hospital and schools, and iron core, which generates, when running vibrates and shape
At noise.What is mainly generated when transformer station high-voltage side bus is low-frequency noise, can be lived to surrounding resident, work and rest generate many not
Benefit influences, and significantly increases the cost of transmission line of electricity and electric energy loss far from residential block, is unfavorable for the peace of electric system
Entirely, operation efficiently, economic.
In order to preferably solve this problem, various noise reduction means are come into being, be broadly divided into passive noise control and
Active noise reduction two ways.Passive noise control, i.e., passive noise reduction technology take the measures such as sound insulation, sound absorption after noise generates,
This mode is relatively good to high-frequency noise noise reduction effect；And for low-frequency noise, due to the volume of transformer, transport, installation with
The factors such as maintenance, the material that passive noise reduction needs to expend is more, and volume is big, and the economic cost paid is high.Thus directed towards transformation
The active noise reduction of device low-frequency noise just comes into being, and is exactly to generate to vibrate wave phase phase with transformer noise by control system
Instead, amplitude and frequency identical " anti-vibration " offset " original vibration ", and then achieve the purpose that transformer noise reduction.With electric power electricity
Flourishing for sub- technology, is used in the technical various devices of active noise reduction and module integrated level is higher and higher, volume is more next
Smaller, the precision of detection also has greatly improved, and active noise reduction technology is expected to preferably be used on transformer noise reduction.
Summary of the invention
The purpose of the present invention is using active noise reduction technology, the noise of transformer is reduced.Do not changing inside transformer knot
In the case where structure, a transformer silencer is sticked on transformer surface, to solve the problems, such as transformer noise reduction.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of transformer silencer using active noise reduction, it is characterised in that: including ICP acceleration transducer, signal conditioner,
Adaptive vibration active controller, power amplifier and vibration excitor；
The ICP acceleration transducer installs the measurement vibrated in for transformer on the transformer, and the vibration of measurement is believed
Number amplification after be transferred to signal conditioner；
The signal conditioner is used to power to ICP acceleration transducer, and the vibration signal received is improved into standard electric
Adaptive vibration active controller is transferred to after pressure signal；
After the adaptive vibration active controller receives vibration signal, reversal of vibrations signal is generated, and export and put to power
Big device；
Power amplifier is after receiving reversal of vibrations signal, and after the amplification of reversal of vibrations signal, driving vibration excitor generates vibration；
The vibration excitor installation on the transformer, after vibration excitor receives reversal of vibrations signal, generates one and vibrates with transformer
Opposite in phase, amplitude and the identical vibration of frequency, and offseted with transformer vibration, and then reduce transformer vibration noise.
The signal conditioner is connected with acquisition display equipment (such as oscillograph), and signal conditioner believes the vibration received
Number conditioning at standard voltage signal, and be transferred to acquisition display equipment, vibration signal can be observed and be handled in this way, be looked for
Larger and smaller area is vibrated out, silencer is mounted on vibration large area, noise reduction effect becomes apparent.
The ICP acceleration transducer is the ICP acceleration transducer of magnetic support connection, convenient for being directly adsorbed in change by magnetic support
On depressor, install simple and convenient.
The ICP acceleration transducer includes piezoelectric acceleration sensor and charge amplifier, piezoelectric acceleration sensor
It is connected with charge amplifier, after piezoelectric acceleration sensor detects vibration, piezoelectricity is amplified by charge amplifier and is accelerated
Spend the small-signal of sensor output, the subsequent measurement of carry out and transmission that can be more convenient.
The adaptive vibration active controller includes dsp controller and D/A converter；Dsp controller is receiving vibration
After dynamic signal (vibration signal at this time is analog signal), vibration signal is converted into vibration digital signal, then again vibration
Digital signal is reversed, goes out optimal weight vector with X-LMS algorithm search, then carries out adaptive polo placement to vibration digital signal,
By the vibration digital signal delayed by way of compensating phase difference, real-time reversal of vibrations digital signal is generated, and will reversely shake
Dynamic digital signal is sent to D/A converter, and reversed digital vibration signal is converted into reversal of vibrations analog signal by D/A converter,
And by reversal of vibrations analog signal transmission to power amplifier.
The transformer silencer for using active noise reduction further includes case lid and cabinet for cube structure, case lid with
Cabinet combines fixation by modes such as buckle and screws, and ICP acceleration transducer and vibration excitor are mounted on the bottom of box, signal tune
Reason device is mounted on cabinet middle position, and adaptive vibration active controller is mounted on the left side of cabinet, power amplifier installation
In cabinet front.
Compared with prior art, the invention has the following advantages:
Amorphous alloy transformer has the characteristics of low-loss, high energy efficiency, is largely used in China.With the electricity consumption of current China
Amount can save about 30TWh generated energy to calculate every year, reduce the discharge of about 3,000 ten thousand tons of greenhouse gases.If can reduce
The vibration noise that it is generated when running, can make amorphous alloy transformer use more extensive, make more tributes for energy-saving and emission-reduction
It offers.In order to which the technical solution that this patent uses has better effect, transformer vibration experiments must be first carried out, obtains and becomes
The biggish region of depressor surface vibration, then transformer silencer is affixed on to the biggish region of each surface vibration of transformer.When
After transformer silencer noise reduction effect settles out, the amplitude of noise decline is about 6dB --- 12dB, before comparing noise reduction,
Vibration noise has apparent reduction when transformer station high-voltage side bus.
Detailed description of the invention
Fig. 1 is transformer vibration-testing schematic diagram provided by the invention；
Fig. 2 is transformer silencer hardware module schematic diagram provided by the invention；
Fig. 3 is transformer silencer adaptive vibration Active Control Design scheme schematic diagram provided by the invention；
Fig. 4 is transformer silencer overall structure diagram provided by the invention；
Fig. 5 is transformer silencer control system architecture figure provided by the invention；
Fig. 6 is the vibration active control system block diagram provided by the invention based on DSP；
Fig. 7 is vibrational waveform comparison diagram before and after transformer noise reduction provided by the invention；
Fig. 8 is vibrational waveform comparison diagram before and after transformer noise reduction provided by the invention；
Fig. 9 is that two-phase iron core provided by the invention winds schematic diagram；
Figure 10 is that tri-phase iron core provided by the invention winds schematic diagram.
Label 1, transformer core in figure, 2, ICP acceleration transducer, 3, signal conditioner, 4, oscillograph, 5, adaptive
Answer active vibration controller, 6, power amplifier, 7, vibration excitor, 8, transformer.
Specific embodiment
The present invention will be further described with reference to the examples below, and described embodiment is only present invention a part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other embodiments used obtained, belong to protection scope of the present invention under the premise of creative work.
Below in conjunction with all kinds of attached drawings to this patent make it is more definite, specific, vividly describe, allow those skilled in the art
Member has relatively sharp clear understanding to the inside and outside structure of transformer silencer material object.Certainly, it is limited to patent length
The reason of, these drawings are a part of example in this patent.In the present invention, for some indicating positions or positional relationship
Word, such as " back " " side " " centre " " front " "upper" "lower" etc., be all according to transformer front in Practical Project be mark
Standard, attached drawing are seen from front to back, according to description method sanctified by usage, are described in detail as far as possible to these attached drawings.But
Transformer silencer is not that must put according to specific orientation or position, cannot therefore be carried out in orientation to the present invention
Limitation.In addition, patent description " first " " secondly " " last ", is intended only as the composition sequence of hardware configuration in patent, with composition
The importance of this patent is unrelated.
The purpose of the present invention is to provide a kind of transformer silencers using active noise reduction, its cost is than having no chance noise reduction
Low, noise reduction is good than having no chance for noise reduction effect, makes a change without the overall structure to transformer, and shared space is small, cost
It is low.It is tested by transformer surface vibration, searches out each surface vibration maximum region of transformer, and transformer silencer is pasted
In these regions, adaptive vibration active controller therethrough exports a reversal of vibrations signal to vibration excitor, vibration excitor
Frequency is identical one by one for generation, and amplitude opposite " anti-vibration " is offseted with " former to vibrate " that transformer generates, to reduce
Transformer noise.
The embodiment of the present application provides a kind of transformer silencer using active noise reduction, and the silencer includes:
The ICP acceleration transducer connected with magnetic support, contain in the ICP acceleration transducer piezoelectric acceleration sensor and
Charge amplifier.After piezoelectric acceleration sensor detects vibration, piezoelectric acceleration sensing is amplified by charge amplifier
The small-signal of device output, the subsequent measurement of carry out and transmission that can be more convenient.ICP acceleration transducer can be direct
It is adsorbed on transformer by magnetic support, in order to the measurement of vibration；
Signal conditioner, the signal conditioner be for ICP acceleration transducer power supply, by collected vibration signal conditioning at
Standard voltage signal can be connect, to be observed vibration signal and to be located with equipment (oscillograph) such as acquisition displays
Reason.
Adaptive vibration active controller, by several portions such as dsp controller, D/A converter, power module and peripheral circuit
Divide and be integrated into a pcb board, in which:
Dsp controller mainly acquires vibration signal in transformer silencer, and analog signal is turned by A/D converter
It changes digital signal into, then by controller that digital signal is reversed, goes out optimal weight vector with X-LMS algorithm search, and right
Transformer vibration signal carries out adaptive polo placement, by the vibration signal delayed by way of compensating phase difference, generates anti-in real time
To vibration signal；
D/A converter converts digital signals into analog signal, and then reversal of vibrations analog signal real-time Transmission is gone out；
Power module, by the DC voltage in external DC voltage source by voltage adjuster, be adjusted to be suitble to dsp controller,
The power supply of the power supplies such as digital analog converter and other peripheral circuits；
Power circuit, clock, chip external memory and reset circuit etc. are integrated into adaptive vibration active control by peripheral circuit
Device.
Power amplifier amplifies the reversal of vibrations signal of output, to drive vibration excitor to generate vibration；
Vibration excitor: a, amplitude opposite with primary vibration phase and the identical secondary vibration of frequency are generated by secondary vibration signal
It is dynamic, and offseted with transformer vibration, and then reduce transformer vibration noise.
The transformer silencer uses cube structure, and the case lid is combined with cabinet by modes such as buckles and screw
It is fixed, it is ICP acceleration transducer and vibration excitor on bottom surface, can preferably senses vibration, can also be produced by vibration excitor
Raw vibration；Centre is the signal conditioner for improving voltage signal；Adaptive vibration active controller module concentrates on one piece of pcb board
On, it is placed in left side, convenient some devices and parameter in controller are adjusted；Front is a vibration excitor power amplification
Device can also pass through the amplification factor of its regulation power.It is finally integrated into together, and will owned with a cubic support frame
Module connects, and forms a reasonable overall structure.
Due to using above-mentioned technical solution, transformer silencer is affixed on each surface vibration of transformer most
Big region.When not opening transformer silencer, transformer vibration noise is about 50dB --- 70dB；Transformer is opened to eliminate the noise
After device, after conditioning after a period of time, noise significantly decreases, and the amplitude of decline is about 6dB --- and 12dB makes
Noise when transformer station high-voltage side bus has apparent reduction.
As shown in FIG. 1, FIG. 1 is transformer vibration-testing schematic diagram provided by the invention, transformer core 1, magnetic support connections
ICP acceleration transducer (AD1000T-D X&K) 2, signal conditioner (MPS-ISC-2) 3, oscillograph (RIGOL MSO
4024)4.The vibration signal of transformer different zones in operation is measured with ICP acceleration transducer, then passes through signal conditioner
Vibration signal is improved into standard voltage signal, then is transferred to oscillograph and vibration signal is shown, and then know transformer
The vibration large area of silencer.
As shown in Fig. 2, Fig. 2 is transformer silencer hardware module schematic diagram provided by the invention, comprising: transformer core
1, measure vibration is the ICP acceleration transducer 2 of magnetic support connection, by vibration signal conditioning at the signal condition of standard signal
Device 3, adaptive vibration active controller 5 (TMS320F2812, DAC7724 etc.) are reversed in real time defeated by collected vibration signal
Out, amplifying the power amplifier (YE5872) 6 of vibration signal, inputted vibration signal generates the vibration excitor (JZK-5) 7 of vibration, this
The noise elimination object of sound-attenuating system is amorphous alloy epoxy casting dry type transformer 8 (SCBH15-200/10) model, ICP acceleration
Sensor and vibration excitor are arranged in transformer surface.
As shown in figure 3, Fig. 3 is transformer silencer adaptive vibration Active Control Design scheme provided by the invention signal
Figure.It is first with ICP acceleration transducer 2 that vibration signals collecting is good, then believed signal condition at standard by signal conditioner 3
Number, A/D conversion module is carried in dsp chip, converts analog signals into digital signal, then believe vibration by dsp controller
It is number reversed, analog signal output is converted digital signals into D/A converter, finally drives vibration excitor 7 by power amplifier 6
Generate vibration.
As shown in figure 4, being transformer silencer overall structure diagram provided by the invention, the transformer silencer is adopted
It is ICP acceleration transducer 2 and vibration excitor 7 on bottom surface with cube structure；Centre is the signal conditioner for improving voltage signal
3；5 module of adaptive vibration active controller concentrates on one piece of pcb board, is placed in left side；Front is a power amplifier
6.And connect all modules, form a reasonable cube structure.
As shown in figure 5, being transformer silencer control system architecture figure provided by the invention, pass through acquisition equipment acquisition electricity
Signal is pressed, is converted by A/D, digital signal is generated, then is by controller that digital signal is reversed, with X-LMS algorithm search
Optimal weight vector out, and application program carries out adaptive polo placement to transformer vibration signal, and the vibration signal delayed is passed through
The mode for compensating phase difference, generates real-time reversal of vibrations signal.
As shown in fig. 6, being the vibration active control system block diagram provided by the invention based on DSP, pass through DSP internal module
Vibration active control system is integrated into an entirety with external circuit.It is powered first by power circuit to STM320F2812,
It carries out reset operation at once after powering to chip, then oscillating circuit is generated by clock circuit, calling program is made to bring into operation, then
Program is written and is read by program storage and data storage, A/D conversion is carried out by PWM technology, then will turn
The vibration signal of chemical conversion digital signal is handled vibration signal by GAL control logic, finally again by treated vibration
Dynamic signal is exported by D/A converter.
As shown in fig. 7, for vibrational waveform comparison diagram before and after transformer noise reduction provided by the invention；As shown in figure 8, being this hair
Vibrational waveform comparison diagram before and after the transformer noise reduction of bright offer.The two figures are the vibrations of the different zones on the same transformer
Signal waveforms, solid black lines are the vibration signal waveforms figures before noise reduction, and black dotted lines are the vibration signal waveforms figures after noise reduction,
It can be seen that the wave-type vibration after transformer noise reduction is generally less than the wave-type vibration before noise reduction, it is known that transformer silencer is that have
Certain effect.
As shown in Figure 9 and Figure 10 is that two-phase iron core provided by the invention winds schematic diagram；As shown in Figure 10, it is mentioned for the present invention
The tri-phase iron core of confession winds schematic diagram；It can be appreciated that two-phase and the difference that tri-phase iron core is wound from the two figures, and therefore bring
Transformer vibration noise difference.
Finally illustrate: by the technical solution of following Detailed description of the invention the invention patent, being conducive to those skilled in the art
Member understands it.There is also the spaces of optimization for software and hardware in certain this programme, are not influencing transformer silencer items
On the basis of energy, do not have by the optimization and improvement to software and hardware without departing from the practical ranges of the technology of the present invention
Have and make creative achievement, is to of the invention perfect.It is applied in Practical Project, has preferably to transformer
Noise elimination effect.
Claims (6)
1. a kind of transformer silencer using active noise reduction, it is characterised in that: including ICP acceleration transducer, signal condition
Device, adaptive vibration active controller, power amplifier and vibration excitor；
The ICP acceleration transducer installs the measurement vibrated in for transformer on the transformer, and the vibration of measurement is believed
Number amplification after be transferred to signal conditioner；
The signal conditioner is used to power to ICP acceleration transducer, and the vibration signal received is improved into standard electric
Adaptive vibration active controller is transferred to after pressure signal；
After the adaptive vibration active controller receives vibration signal, reversal of vibrations signal is generated, and export and put to power
Big device；
Power amplifier is after receiving reversal of vibrations signal, and after the amplification of reversal of vibrations signal, driving vibration excitor generates vibration；
The vibration excitor installation on the transformer, after vibration excitor receives reversal of vibrations signal, generates one and vibrates with transformer
Opposite in phase, amplitude and the identical vibration of frequency.
2. a kind of transformer silencer using active noise reduction according to claim 1, it is characterised in that: the signal tune
Reason device is connected with acquisition display equipment, and signal conditioner improves the vibration signal received at standard voltage signal, and transmits
Equipment is shown to acquisition.
3. a kind of transformer silencer using active noise reduction according to claim 1, it is characterised in that: the ICP adds
Velocity sensor is the ICP acceleration transducer of magnetic support connection.
4. a kind of transformer silencer using active noise reduction according to claim 1, it is characterised in that: the ICP adds
Velocity sensor includes piezoelectric acceleration sensor and charge amplifier, and piezoelectric acceleration sensor is connected with charge amplifier,
After piezoelectric acceleration sensor detects vibration, the faint of piezoelectric acceleration sensor output is amplified by charge amplifier
Signal.
5. a kind of transformer silencer using active noise reduction according to claim 1, it is characterised in that: described adaptive
Active vibration controller includes dsp controller and D/A converter；Dsp controller is after receiving vibration signal, by vibration signal
It is converted into vibration digital signal, it is then again that vibration digital signal is reversed, go out optimal weight vector with X-LMS algorithm search, so
Adaptive polo placement is carried out to vibration digital signal afterwards, by the vibration digital signal delayed by way of compensating phase difference, is generated
Real-time reversal of vibrations digital signal, and reversal of vibrations digital signal is sent to D/A converter, D/A converter will reversed number
Vibration signal is converted into reversal of vibrations analog signal, and by reversal of vibrations analog signal transmission to power amplifier.
6. a kind of transformer silencer using active noise reduction according to claim 1, it is characterised in that: described use has
The transformer silencer of source noise reduction is cube structure, further includes case lid and cabinet, and case lid and cabinet pass through buckle and screw
Etc. modes combine fixation, ICP acceleration transducer and vibration excitor are mounted on the bottom of box, and signal conditioner is mounted among cabinet
Position, adaptive vibration active controller are mounted on the left side of cabinet, and power amplifier is mounted on cabinet front.
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