CN113870824A - silent container - Google Patents
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- CN113870824A CN113870824A CN202111296295.8A CN202111296295A CN113870824A CN 113870824 A CN113870824 A CN 113870824A CN 202111296295 A CN202111296295 A CN 202111296295A CN 113870824 A CN113870824 A CN 113870824A
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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
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
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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
- G10K11/1787—General system configurations
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3028—Filtering, e.g. Kalman filters or special analogue or digital filters
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Abstract
本申请公开了一种静音集装箱，涉及移动电源技术领域，包括集装箱体和设置在集装箱体中的移动电源和声波发生器；声波发生器包括至少两台声波传感器、声波信号处理装置和至少两台声波发射器；声波传感器固定于集装箱体中的不同位置，声波传感器用于采集集装箱体中的噪音声源信号样本；声波处理装置对信号样本进行分析计算、相位反向、功率放大、滤除杂波一系列处理，产生与噪音声源信号频率相同相位相反的电流；声波发射器将该电流转换成声波向集装箱内部空间发射，抵消声源的能量，达到降噪效果。同时静音集装箱还包括至少一层吸音膜。采用声波发生器能够有效减小集装箱中的噪音，再配合吸音膜对噪音的吸附，有效控制了集装箱的噪音污染。
The application discloses a silent container, which relates to the technical field of mobile power sources, including a container body, a mobile power source and a sound wave generator arranged in the container body; the sound wave generator includes at least two acoustic wave sensors, an acoustic wave signal processing device and at least two Sound wave transmitter; sound wave sensor is fixed at different positions in the container body, and the sound wave sensor is used to collect noise sound source signal samples in the container body; A series of wave processing generates a current with the same frequency and opposite phase as the noise sound source signal; the sound wave transmitter converts the current into a sound wave and emits it to the interior space of the container, canceling the energy of the sound source and achieving the effect of noise reduction. Meanwhile, the silent container also includes at least one layer of sound-absorbing film. The use of a sound wave generator can effectively reduce the noise in the container, and combined with the sound-absorbing film to absorb the noise, the noise pollution of the container can be effectively controlled.
Description
Technical Field
The application relates to the technical field of mobile power supplies, in particular to a mute container.
Background
At present, the problem of electric power shortage in China is more and more prominent, and the requirement of people on environmental protection is higher and higher. As a standby power supply of a power supply network, a silent generator set is largely used due to low noise, and is an indispensable emergency device in places with strict requirements on environmental noise, such as hospitals, hotels, high-grade living areas, large shopping malls and the like.
In addition, along with the requirement that the user does not have a power failure and has higher and higher requirements, the demand of the mobile power generation car is correspondingly and rapidly developed, meanwhile, due to the rapid development of the electric car, the supply and demand contradiction also occurs to the charging problem, a large number of commercial customers face various charging problems such as no charging pile, incapability of power distribution of a power grid or insufficient distribution limit, and the charging cars or vehicle-mounted charging stations with various kinds of mobility are produced in order to solve the regional charging problem. The container bodies of the mobile power supply vehicles and the charging vehicles are poor in silencing effect, so that the phenomenon that the operation noise disturbs people generally exists in the mobile power supply vehicles. Therefore, how to effectively reduce the noise of the container of the portable power source vehicle becomes one of the technical problems to be solved urgently at the present stage.
Disclosure of Invention
In view of this, the application provides a silent container, on the basis of setting up the sound absorption membrane, introduced sound generator, to different noise sound source frequencies, sound generator automatically generates the electric current that is unanimous with the sound source frequency, opposite phase place, and sound emitter converts this electric current into the sound wave and launches to container inside, offsets the noise sound source, has greatly reduced the noise pollution of the container that bears the weight of portable power source.
The application provides a silent container, which comprises a container body, a mobile power supply and a sound generator, wherein the mobile power supply and the sound generator are arranged in the container body;
the sound wave generator comprises at least two sound wave sensors, a sound wave signal processing device and at least two sound wave emitters, the sound wave sensors are electrically connected with the sound wave signal processing device, and the sound wave signal processing device is also electrically connected with the sound wave emitters; the sound wave sensors are fixed at different positions in the container body and are used for collecting signal samples corresponding to the noise source in the centralized container body and transmitting the signal samples to the sound wave signal processing device; the sound wave signal processing device processes the signal sample, generates current with the same frequency as the noise sound source signal and opposite phase, and transmits the current to the sound wave emitter; the acoustic wave transmitter converts the current into an acoustic wave;
the mobile power supply comprises at least two noise sources with different sound wave frequencies, the sound wave sensor is arranged corresponding to the noise sources, and the noise sources comprise a first noise source and a second noise source;
the sound wave emitter comprises a first sound wave emitter and a second sound wave emitter, the frequency of the sound wave emitted by the first sound wave emitter is the same as that of the noise sound wave emitted by the first noise sound source, and the phase of the sound wave emitted by the first sound wave emitter is opposite to that of the noise sound wave emitted by the first noise sound source; the frequency of the sound wave emitted by the second sound wave emitter is the same as that of the noise sound wave emitted by the second noise sound source, and the phase of the sound wave emitted by the second sound wave emitter is opposite to that of the noise sound wave emitted by the second noise sound source;
the mute container also comprises at least one layer of sound absorption film, and the sound absorption film covers the inner wall of the container body.
Optionally, wherein:
the acoustic wave signal processing apparatus includes a first amplifier, a waveform analyzer, an inverter, a second amplifier, and a filter, wherein,
the sound wave sensor is electrically connected with the input end of the first amplifier; the sound wave sensor is used for collecting sound waves of a corresponding noise sound source, converting the collected sound waves into electric signals and transmitting the electric signals to the first amplifier;
the output end of the first amplifier is electrically connected with the input end of the wave analyzer, the first amplifier is used for amplifying the electric signal corresponding to the sound wave and then transmitting the electric signal to the wave analyzer, and the wave analyzer is used for calculating the frequency, the waveform and the amplitude of the electric signal according to the waveform of the received electric signal;
the output end of the wave analyzer is connected with the input end of the phase inverter, the output end of the phase inverter is electrically connected with the input end of the second amplifier, and the phase inverter is used for transmitting the electric signal after phase inversion to the second amplifier after inverting the phase of the received electric signal;
the output end of the second amplifier is electrically connected with the input end of the filter, and the second amplifier is used for amplifying an electric signal and transmitting the electric signal to the filter;
the output end of the filter is electrically connected with the sound wave emitter, the filter is used for filtering electric signals and then sending the electric signals to the sound wave emitter, and the sound wave emitter converts electric energy into sound waves.
Optionally, wherein:
the second amplifier is a gain adjustable amplifier.
Optionally, wherein:
the wave analyzer is an oscilloscope.
Optionally, wherein:
the first amplifier, the wave analyzer, the inverter, the second amplifier, the filter, and the acoustic transmitter are mounted in the same distribution box, which is located in the container body.
Optionally, wherein:
the portable power source at least comprises a generator set, a rectifier, an inverter and a cooling fan, and the noise source at least comprises a sound source of noise emitted by the generator set, the rectifier, the inverter and the cooling fan.
Optionally, wherein:
the sound wave sensor and the noise sound source which are correspondingly arranged are arranged at the position corresponding to the maximum noise power point of the noise sound source corresponding to the sound wave sensor, wherein the maximum noise power point is positioned in the container body.
Optionally, wherein:
the position of the acoustic sensor in the container body is adjustable.
Optionally, wherein:
the sound absorbing film comprises polyester fibers.
Optionally, wherein:
the power of the sound wave generator is adjustable.
Compared with the prior art, the silence container that this application provided has realized following beneficial effect at least:
in the silence container that this application provided, introduced sound wave generator, restrain the noise in the container. The device comprises a sound wave generator, a sound wave signal processing device and a sound wave emitter, wherein the sound wave generator is used for collecting a noise source signal sample in a container body; the sound wave processing device carries out a series of processing of analysis and calculation, phase reversal, power amplification and clutter filtering on the signal sample to generate current with the same frequency as the noise sound source and opposite phase; the sound wave emitter converts the current into sound waves to be emitted to the inner space of the container, the energy of a sound source is offset, and the noise reduction effect is achieved.
Be provided with portable power source in the container body, portable power source includes the different noise sound source of two at least sound wave frequencies, and this application sets up the sound wave transmitter for the noise sound source correspondence, and first sound wave transmitter corresponds the setting with first noise sound source promptly, and the sound wave frequency of the sound wave transmission of first sound wave transmitter is the same with the noise sound wave frequency that first noise sound source sent, opposite phase, so, can restrain the noise that first noise sound source sent. The frequency of the sound wave emitted by the second sound wave emitter is the same as and opposite to the phase of the sound wave emitted by the second noise sound source, so that the noise emitted by the second noise sound wave can be suppressed. Adopt different sound wave transmitter to restrain the noise that different noise sound sources sent, can effectively reduce the noise pollution that portable power source in the container sent.
In addition, this application is provided with the sound absorption membrane at the inner wall of container, and the sound absorption membrane can carry out further absorption to the noise that portable power source sent, further reduces the volume of conducting to the outside noise of container, consequently effectively avoids or has reduced the noise pollution of the container that bears portable power source, avoids disturbing residents' emergence.
Of course, it is not necessary for any product to achieve all of the above-described technical effects simultaneously.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a silent container according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the waveform of sound waves emitted by a sound wave emitter and the waveform of noise sound waves emitted by a noise source;
fig. 3 is a schematic structural diagram of an acoustic wave generator in a silent container according to an embodiment of the present application;
fig. 4 is a diagram illustrating a relative position relationship between components of an acoustic wave generator in a container according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic structural diagram of a silent container according to an embodiment of the present invention, please refer to fig. 1, which provides a silent container 100, including a container body 10, and a portable power source 20 and a sound wave generator 30 disposed in the container body 10;
the acoustic wave generator 30 comprises at least two acoustic wave sensors 31, an acoustic wave signal processing device 35 and at least two acoustic wave transmitters 32, wherein the acoustic wave sensors 31 are electrically connected with the acoustic wave signal processing device 35, and the acoustic wave signal processing device 35 is also electrically connected with the acoustic wave sensors 32; the acoustic wave sensors 31 are fixed at different positions in the container body 10, and the acoustic wave sensors 31 are used for collecting signal samples corresponding to noise sources in the container body and transmitting the signal samples to the acoustic wave signal processing device 35; the acoustic signal processing device 35 processes the signal sample, generates a current with the same frequency as the noise source signal and opposite phase, and transmits the current to the acoustic transmitter 32; the acoustic transmitter 32 converts the current into acoustic waves;
the mobile power supply 20 comprises at least two noise sources with different sound wave frequencies, the sound wave sensor 31 is arranged corresponding to the noise sources, and the noise sources comprise a first noise source and a second noise source;
the acoustic wave emitter 32 in the acoustic wave generator 30 includes a first acoustic wave emitter and a second acoustic wave emitter, the frequency of the acoustic wave emitted by the first acoustic wave emitter is the same as the frequency of the noise acoustic wave emitted by the first noise source, and the phase of the acoustic wave emitted by the first acoustic wave emitter is opposite to the phase of the noise acoustic wave emitted by the first noise source; the frequency of the sound wave emitted by the second sound wave emitter is the same as that of the noise sound wave emitted by the second noise sound source, and the phase of the sound wave emitted by the second sound wave emitter is opposite to that of the noise sound wave emitted by the second noise sound source;
the silent container 100 further comprises at least one sound absorption film 40, and the sound absorption film 40 covers the inner wall of the container body 10.
Fig. 1 shows only the relative positional relationship among the container body 10, the portable power source 20, the acoustic wave sensor 31, the acoustic wave signal processing device 35, and the acoustic wave transmitter 32 in the silent container 100, and does not represent an actual configuration or size. The acoustic sensor 31 and acoustic emitter 32 of the acoustic generator 30 are also merely illustrative. The silent container 100 in the present application is, for example, a container corresponding to a vehicle-mounted portable power supply vehicle, and the portable power supply 20 is carried on the container 100, and may be used for emergency power supply, or may be used as a mobile charging vehicle or a vehicle-mounted charging station. Consider that the container body silence effect of all kinds of removal type supply vehicle, storage battery car among the prior art is relatively poor, the ubiquitous phenomenon of disturbing citizen in operation, this application is improved to this defect, specifically as follows:
referring to fig. 1, the present application provides a silent container 100, in which a sound generator 30 is introduced to suppress noise in the container 100. Specifically, the acoustic wave generator 30 includes at least two acoustic wave sensors 31, an acoustic wave signal processing device 35, and at least two acoustic wave transmitters 32, where the acoustic wave sensors 31 are used to collect noise source signal samples in the container body; the acoustic wave processing device 35 performs a series of processing on the signal sample, such as analysis and calculation, phase reversal, power amplification and clutter filtering, and generates a current with the same frequency as the noise source signal and opposite phase; the sound wave emitter 32 converts the current into sound waves, and the sound waves are emitted to the inner space of the container to offset the energy of the sound source, so that the noise reduction effect is achieved.
The portable power source 20 is disposed in the container body 10, and the portable power source 20 includes at least two noise sources (not shown in the figure) with different sound wave frequencies, for example, a generator set in the portable power source 20 generates noise when operating, and a cooling fan also generates noise when operating, and the sources of these noises can be regarded as noise sources. Optionally, the sound wave emitter 32 in the present application may be disposed corresponding to a noise source, and different sound wave emitters 32 may be disposed for different noise sources.
This application corresponds for the noise sound source and sets up sound wave transmitter, for example with first sound wave transmitter and the corresponding setting of first noise sound source, the frequency of the sound wave of first sound wave transmitter transmission is the same with the noise sound wave frequency that first noise sound source sent, the phase opposite, so, first sound wave transmitter can restrain the noise that first noise sound source sent. The frequency of the sound wave emitted by the second sound wave emitter is the same as that of the noise sound source emitted by the second noise sound source, and the phase of the sound wave emitted by the second sound wave emitter is opposite to that of the noise sound source, so that the second sound wave emitter can suppress the noise emitted by the second noise sound source. The noise emitted by different noise sources is suppressed by adopting different sound wave emitters 32, so that the noise pollution emitted by the mobile power supply 20 in the container 100 can be effectively reduced. In addition, according to the present invention, the sound absorption film 40 is disposed on the inner wall of the container 100, and the sound absorption film 40 can further absorb the noise emitted by the portable power source 20, so as to further reduce the amount of the noise transmitted to the outside of the container 100, thereby effectively avoiding or reducing the noise pollution of the container 100 carrying the portable power source 20, and avoiding the occurrence of the disturbing phenomenon.
It should be noted that, in the above embodiments, only two sound wave emitters are taken as an example to correspond to two noise sources, and in some other embodiments of the present application, three or more sound wave emitters 32 may be further disposed in the container body 10 according to the requirement of the actual noise source, so as to reduce noise pollution caused by each noise source.
When introducing sound generator 30 in container body 10 in this application, can the effective control container body 10 internal noise give off, not only make the external noise of box satisfy various environmental demands when the equipment operation of container body 10 in, still avoided causing the problem that equipment heat dissipation is not smooth in the box, sacrifice equipment power output when the box inner wall adopts thick sound absorbing membrane 40.
Since the phase of the sound wave emitted from the sound wave emitter 32 is opposite to the phase of the noise sound wave emitted from the corresponding noise source, referring to fig. 2, fig. 2 is a schematic diagram illustrating the waveform of the sound wave emitted from the sound wave emitter 32 (corresponding to the noise canceling waveform in fig. 2) and the waveform of the noise sound wave emitted from the noise source (corresponding to the noise waveform in fig. 2). When the two sound waves have the same frequency and opposite phases, the sound wave emitted by the sound wave emitter 32 can be mostly offset from the noise sound wave, or the noise sound wave is effectively weakened, so that the requirement of the mobile power supply on the noise in the operation site is met. Thus, the noise pollution of the container body 10 can be effectively weakened by introducing the sound wave generator 30.
It should also be noted that for the sonic emitters, current signals of similar frequencies may be superimposed, for example, sound waves of 1 khz and 10 khz may be transmitted together in superposition, i.e., the sonic emitters may transmit sound waves in a certain frequency range, rather than only sound waves of a fixed frequency.
In addition, for the noise in the container body, in practical application, the noise does not need to be reduced to zero, but is reduced to a degree that most people can accept, for example, the human ear is most sensitive to the noise at 800 hz, other power can be equivalent to 800 hz in calculating the noise power, and the frequency point with the maximum equivalent noise power is taken as the key point to cancel the frequency.
Fig. 3 is a schematic structural diagram of the sound wave generator 30 in the silent container 100 according to an embodiment of the present invention, which illustrates the sound wave generator 30 in a form of a block diagram.
Referring to fig. 3, in an alternative embodiment of the present application, the acoustic signal processing apparatus 35 further comprises a first amplifier 35-1, a wave analyzer 35-2, an inverter 35-3, a second amplifier 35-4, and a filter 35-5, wherein,
the acoustic wave sensor 31 is electrically connected to an input of the first amplifier 35-1; the sound wave sensor 31 is configured to collect sound waves of a corresponding noise source, convert the collected sound waves into electrical signals, and transmit the electrical signals to the first amplifier 35-1;
the output end of the first amplifier 35-1 is electrically connected with the input end of the wave analyzer 35-2, the first amplifier 35-1 is used for amplifying the electric signal corresponding to the sound wave and transmitting the electric signal to the wave analyzer 35-2, and the wave analyzer 35-2 is used for calculating the frequency, the waveform and the amplitude of the electric signal according to the waveform of the received electric signal;
the output end of the wave analyzer 35-2 is connected with the input end of the inverter 35-3, the output end of the inverter 35-3 is electrically connected with the input end of the second amplifier 35-4, and the inverter 35-3 is used for inverting the phase of the received electric signal and transmitting the electric signal with inverted phase to the second amplifier 35-4;
the output end of the second amplifier 35-4 is electrically connected with the input end of the filter 35-5, and the second amplifier 35-4 is used for amplifying the electric signal and transmitting the electric signal to the filter 35-5;
the output end of the filter 35-5 is electrically connected with the acoustic wave emitter 32, the filter 35-5 is used for filtering the electric signal and then sending the electric signal to the acoustic wave emitter 32, and the acoustic wave emitter 32 converts the electric energy into acoustic waves.
It should be noted that the sound wave transmitter in FIG. 3 includes sound wave transmitters 1, … … and sound wave transmitter N, where N ≧ 2. The power supplies in the box body work with different output powers, and N is different.
Specifically, fig. 3 shows a specific structure of the acoustic wave generator 30, wherein the number of the acoustic wave sensors 31 may be multiple, and the acoustic wave sensors 31 are configured to collect acoustic waves of a corresponding noise source, convert acoustic signals corresponding to the acoustic waves into electrical signals, and transmit the corresponding electrical signals to the first amplifier 35-1. The electrical signal is transmitted to the wave analyzer 35-2 after being amplified by the first amplifier 35-1, the wave analyzer 35-2 can calculate the frequency, the waveform and the amplitude of the corresponding electrical signal according to the waveform of the received electrical signal, and then transmit the electrical signal to the inverter 35-3, the inverter 35-3 is used for inverting the phase of the electrical signal and transmitting the inverted electrical signal to the second amplifier 35-4. The signal amplified by the second amplifier 35-4 is transmitted to the filter 35-5, and the filter 35-5 filters out the unwanted signal and retains the wanted signal for transmission to the sonic transmitter 32. At this time, the phase of the signal emitted by the acoustic wave emitter 32 is opposite to the phase of the noise acoustic wave collected by the acoustic wave sensor 31, and the frequency of the noise acoustic wave is not changed, so the frequency of the acoustic wave emitted by the acoustic wave emitter 32 is the same as the frequency of the noise acoustic wave. In this way, a signal having the same frequency as the noise sound wave and an opposite phase is formed to suppress the noise sound wave.
Optionally, a control switch K is disposed between the acoustic wave transmitter 32 and the filter 35-5, and when the acoustic wave transmitter 32 needs to be turned on, the control switch K between the corresponding acoustic wave transmitter 32 and the filter 35-5 is turned on.
In an alternative embodiment of the present application, the second amplifier 35-4 is a gain adjustable amplifier. The gain-adjustable amplifier is also called a variable gain amplifier, and the amplifier can adjust the output power of the electrical signal, for example, the gain of the amplifier can be adjusted from 20 times to 200 times to increase the output power of the electrical signal. Considering that the sound generator 30 needs to consume electric energy in the working process, the electric energy consumed by the sound generator 30 in working and the noise reduction benefit are changed in a nonlinear relation, for example, when a certain mobile power supply consumes 1KW of electricity, the noise can be reduced by 2 db; when consuming 10KW, the noise can be reduced by 4 db. According to the embodiment of the application, the gain of the gain-adjustable amplifier is adjusted, the transmitting power is adjusted, and when the decibel index of the noise of the working site of the mobile power supply is met, the consumption of electric energy is reduced as much as possible, so that a better energy consumption noise reduction ratio can be obtained.
Optionally, the gain-adjustable amplifier is of a type PE15a7000, AD603AR, etc.
In an alternative embodiment of the present application, the wave analyzer 35-2 is an oscilloscope.
In particular, an oscilloscope is an electronic measuring instrument that can convert electrical signals invisible to the naked eye into visible images, facilitating the study of the changing processes of various electrical phenomena. The oscillograph can be used to observe the waveform curve of different signal amplitudes varying with time and to test different electric quantities, such as voltage, current, frequency, phase difference, etc. In the embodiment of the present application, the oscilloscope is used as the waveform analyzer 35-2, and is mainly used for calculating the frequency, waveform, amplitude, and the like corresponding to the electrical signal according to the waveform of the received electrical signal, so that the frequency of the sound wave output by the sound wave transmitter is the same as the frequency of the sound wave corresponding to the noise source, thereby implementing a better noise suppression function.
Optionally, models that the oscilloscope may employ include anli MP2110A, tack DSA8300, and so on.
Alternatively, the first amplifier 35-1 in the embodiment of the present application may employ a conventional operational amplifier, and the model may be, for example, TLV2452IDR, NE5532ADR, or the like.
Alternatively, the inverter 35-3 in the embodiment of the present application may adopt a CMOS inverter circuit, which is composed of two enhancement type MOS field effect transistors and may invert the phase of the input signal by 180 degrees. In addition, the model of inverter 35-3 may be selected to be 74VHC14MX SOIC-14, NL27WZ04DTT1G, and so on.
Alternatively, the filter 35-5 in the embodiment of the present application may be a filter circuit composed of a capacitor, an inductor, a resistor, and a transistor, and the filter 35-5 may effectively block a specific frequency from passing through or frequencies other than the specific frequency in the electrical signal to obtain an electrical signal of the specific frequency, or eliminate the electrical signal after the specific frequency. Optionally, filter 35-5 is model SRR1210-680M, TLV431ACDBVR, or the like.
Optionally, the acoustic wave transmitter 32 in the embodiment of the present application is an instrument capable of converting an electrical signal into an acoustic wave and transmitting the acoustic wave, and its model may be PXDAQ16172G, for example, which is not particularly limited in this application.
Fig. 4 is a diagram showing the relative positions of the components of the sound generator 30 in the container 10 according to an embodiment of the present application, and referring to fig. 4, in an alternative embodiment of the present application, the first amplifier 35-1, the wave analyzer 35-2, the inverter 35-3, the second amplifier 35-4, the filter 35-5 and the sound emitter 32 are installed in the same distribution box 50, and the distribution box 50 is located in the container 10.
It should be noted that the acoustic wave sensor shown in FIG. 4 includes acoustic wave sensor 1, … … acoustic wave sensor N, where N ≧ 2. The power supplies in the box body work with different output powers, and N is different.
Specifically, in order to reduce the space occupied by the sound wave generator 30 in the container body 10, in the mute container provided in the embodiment of the present application, the first amplifier 35-1, the wave analyzer 35-2, the inverter 35-3, the second amplifier 35-4, the filter 35-5, and the sound wave transmitter 32 in the sound wave generator 30 are integrally installed in the same distribution box 50, which not only facilitates unified management, but also can reasonably arrange the space.
With continued reference to fig. 4, in an alternative embodiment of the present application, the acoustic wave sensor 31 is disposed corresponding to the noise source, and the acoustic wave sensor 31 is installed at a position corresponding to the maximum noise power point of the corresponding noise source, wherein the maximum noise power point is located in the container body 10.
Specifically, when the equipment in the container body 10 is operated, the relative powers of the noises emitted from the respective noise sources are different, and there is a noise power point at which the relative power is large, that is, a point at which the decibel of the noise is highest for each noise source. In practical application, a decibel meter can be used to test the maximum noise power point corresponding to each noise source in advance, then the acoustic wave sensor 31 is installed at the position of the maximum noise power point, and the acoustic wave sensor 31 is used to collect the acoustic wave of the corresponding noise source. When the equipment in the container body 10 is in a stable state, that is, the operation frequency is relatively stable, the switch corresponding to the sound wave emitter 32 is turned on, so that the emitter emits sound waves with the same frequency and opposite phase with the sound waves of the noise source, vibration sound waves emitted by different equipment in the container body 10 are offset, and a better energy consumption noise reduction ratio can be obtained by adjusting the gain of the second amplifier 35-4.
This application embodiment installs acoustic wave sensor 31 in the position that corresponds rather than the maximum noise power point of the noise sound source that corresponds, is favorable to promoting acoustic wave sensor 31 to the collection efficiency of noise signal, is favorable to promoting the collection accuracy of noise sound wave simultaneously to make the frequency of the sound wave that finally sends by acoustic wave transmitter 32 the same with the frequency of noise sound wave, opposite phase, in order to play the inhibitory action of preferred to the noise sound wave.
In an alternative embodiment of the present application, please refer to fig. 1, the mobile power source 20 includes a generator set, a rectifier, an inverter, and a heat dissipation fan (not shown), and the noise source includes at least a source of noise generated by the generator set, the rectifier, the inverter, and the heat dissipation fan.
Specifically, when the silent container 100 in the embodiment of the present application is applied to a mobile power generation car or a mobile power supply 20, devices such as a generator set, a rectifier, an inverter, and a cooling fan are introduced into the container body 10 to achieve functions of generating power and cooling heat.
Because the noise that different equipment sent is different, that is to say that the frequency that different noise sound sources correspond the noise that sends is different, different sound wave sensor 31 is set up according to different noise sound sources in this application embodiment, utilizes different sound wave sensor 31 to gather respectively the sound wave that different noise sound sources sent, and then generates the sound wave that corresponds with different noise sound sources, and the sound wave frequency with noise sound source is the same promptly, opposite signal in phase to the suppression function to the noise is realized.
Referring to fig. 4, in an alternative embodiment of the present application, the position of the acoustic sensor 31 in the container body 10 is adjustable. For example, the acoustic wave sensor 31 may be fixed to a movable support. Considering that the maximum noise power point corresponding to the same noise source may be located at different positions when the device is operated each time, that is, the maximum noise power point collected by the decibel meter is located at different positions, when the acoustic wave sensor 31 is set to be in a position-adjustable form, the position of the acoustic wave sensor 31 can be flexibly adjusted according to the change of the position of the maximum noise power point, so that the acquisition accuracy of the acoustic wave sensor 31 is improved while the application flexibility is increased.
In an alternative embodiment of the present application, please refer to fig. 1, the sound absorbing membrane 40 comprises polyester fibers. Polyester fiber, commonly known as "polyester", is a synthetic fiber obtained by spinning polyester obtained by polycondensation of organic dibasic acid and dihydric alcohol, is called PET fiber for short, belongs to a high molecular compound, and is a common material in the prior art.
Particularly, the polyester fiber material is rich in elasticity, has better toughness, better wear resistance, impact resistance, tear resistance, difficult scratching, larger board width and better sound absorption and noise reduction effects. The sound absorbing film 40 made of polyester fibers is attached to the inner wall of the container body 10. After the noise generated by the equipment in the container body 10 is suppressed by the sound generator 30, even if some noise is not completely filtered, the noise can be reduced by the polyester fiber sound absorption film 40, so that the standard of the silent container 100 is achieved.
In the practical application process, on the premise of not influencing the heat dissipation of equipment in the container body, if the power supply equipment in the container body is high-frequency noise, the noise reduction function of the container can be further improved by properly increasing the thickness of the sound absorption film.
It should be noted that, besides the polyester fiber material, other materials with sound absorption function, such as mineral wool sound absorption material, metal sound absorption material, cloth sound absorption material, wood sound absorption material, etc., may also be used as the sound absorption film in the embodiments of the present application, which is not particularly limited in the present application.
In other embodiments of the invention, the power of the acoustic wave generator is adjustable. Therefore, the power of the sound wave generator can be flexibly adjusted according to different application scenes, so that the application flexibility of the sound wave generator applied to the mobile power supply vehicle is improved.
It should be noted that the same sound wave generator can be applied to mobile power supplies with different high-frequency noises, and the frequency emitted by the sound wave generator depends on the frequency of the signal acquired by the sound wave sensor.
In summary, the above embodiments of the present application achieve the following technical effects:
in the silence container that this application provided, introduced sound wave generator, restrain the noise in the container. The device comprises a sound wave generator, a sound wave signal processing device and a sound wave emitter, wherein the sound wave generator is used for collecting a noise source signal sample in a container body; the sound wave processing device carries out a series of processing of analysis and calculation, phase reversal, power amplification and clutter filtering on the signal sample to generate current with the same frequency as the noise sound source and opposite phase; the sound wave emitter converts the current into sound waves to be emitted to the inner space of the container, the energy of a sound source is offset, and the noise reduction effect is achieved.
Be provided with portable power source in the container body, portable power source includes the different noise sound source of two at least sound wave frequencies, and this application sets up the sound wave transmitter for the noise sound source correspondence, and first sound wave transmitter corresponds the setting with first noise sound source promptly, and the sound wave frequency of the sound wave transmission of first sound wave transmitter is the same with the noise sound wave frequency that first noise sound source sent, opposite phase, so, can restrain the noise that first noise sound source sent. The frequency of the sound wave emitted by the second sound wave emitter is the same as and opposite to the phase of the sound wave emitted by the second noise sound source, so that the noise emitted by the second noise sound wave can be suppressed. Adopt different sound wave transmitter to restrain the noise that different noise sound sources sent, can effectively reduce the noise pollution that portable power source in the container sent.
In addition, this application is provided with the sound absorption membrane at the inner wall of container, and the sound absorption membrane can carry out further absorption to the noise that portable power source sent, further reduces the volume of conducting to the outside noise of container, consequently effectively avoids or has reduced the noise pollution of the container that bears portable power source, avoids disturbing residents' emergence.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A silent container is characterized by comprising a container body, a mobile power supply and a sound generator, wherein the mobile power supply and the sound generator are arranged in the container body;
the sound wave generator comprises at least two sound wave sensors, a sound wave signal processing device and at least two sound wave emitters, the sound wave sensors are electrically connected with the sound wave signal processing device, and the sound wave signal processing device is also electrically connected with the sound wave emitters; the sound wave sensors are fixed at different positions in the container body and are used for collecting signal samples corresponding to the noise source in the centralized container body and transmitting the signal samples to the sound wave signal processing device; the sound wave signal processing device processes the signal sample, generates current with the same frequency as the noise sound source signal and opposite phase, and transmits the current to the sound wave emitter; the acoustic wave transmitter converts the current into an acoustic wave;
the mobile power supply comprises at least two noise sources with different sound wave frequencies, the sound wave sensor is arranged corresponding to the noise sources, and the noise sources comprise a first noise source and a second noise source;
the sound wave emitter comprises a first sound wave emitter and a second sound wave emitter, the frequency of the sound wave emitted by the first sound wave emitter is the same as that of the noise sound wave emitted by the first noise sound source, and the phase of the sound wave emitted by the first sound wave emitter is opposite to that of the noise sound wave emitted by the first noise sound source; the frequency of the sound wave emitted by the second sound wave emitter is the same as that of the noise sound wave emitted by the second noise sound source, and the phase of the sound wave emitted by the second sound wave emitter is opposite to that of the noise sound wave emitted by the second noise sound source;
the mute container also comprises at least one layer of sound absorption film, and the sound absorption film covers the inner wall of the container body.
2. The quiet container of claim 1 wherein said sonic signal processing means includes a first amplifier, a wave analyzer, an inverter, a second amplifier, and a filter, wherein,
the sound wave sensor is electrically connected with the input end of the first amplifier; the sound wave sensor is used for collecting sound waves of a corresponding noise sound source, converting the collected sound waves into electric signals and transmitting the electric signals to the first amplifier;
the output end of the first amplifier is electrically connected with the input end of the wave analyzer, the first amplifier is used for amplifying the electric signal corresponding to the sound wave and then transmitting the electric signal to the wave analyzer, and the wave analyzer is used for calculating the frequency, the waveform and the amplitude of the electric signal according to the waveform of the received electric signal;
the output end of the wave analyzer is connected with the input end of the phase inverter, the output end of the phase inverter is electrically connected with the input end of the second amplifier, and the phase inverter is used for transmitting the electric signal after phase inversion to the second amplifier after inverting the phase of the received electric signal;
the output end of the second amplifier is electrically connected with the input end of the filter, and the second amplifier is used for amplifying an electric signal and transmitting the electric signal to the filter;
the output end of the filter is electrically connected with the sound wave emitter, the filter is used for filtering electric signals and then sending the electric signals to the sound wave emitter, and the sound wave emitter converts electric energy into sound waves.
3. A mute container as claimed in claim 2, wherein the second amplifier is a gain adjustable amplifier.
4. The quiet container of claim 2, wherein said wave analyzer is an oscilloscope.
5. A quiet container as claimed in claim 2, wherein said first amplifier, said wave analyser, said inverter, said second amplifier, said filter and said sonic transmitter are mounted in the same electrical box, said electrical box being located in said container body.
6. The quiet container of claim 1, wherein said portable power source includes at least a generator set, a rectifier, an inverter, and a heat sink fan, and said noise source includes at least a source of noise emitted by said generator set, said rectifier, said inverter, and said heat sink fan.
7. The quiet container according to claim 1, wherein said acoustic wave sensor is installed at a position corresponding to a maximum noise power point of a noise source corresponding to said acoustic wave sensor among said acoustic wave sensor and said noise source, wherein said maximum noise power point is located in said container body.
8. The quiet container of claim 1, wherein a position of said acoustic sensor within said container body is adjustable.
9. The quiet container of claim 1, wherein said sound absorbing film comprises polyester fibers.
10. The quiet container of claim 1, wherein the power of said sonic generator is adjustable.
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| CN202111296295.8A CN113870824A (en) | 2021-11-03 | 2021-11-03 | silent container |
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