CN208300006U - Subsonic wave generator - Google Patents
Subsonic wave generator Download PDFInfo
- Publication number
- CN208300006U CN208300006U CN201820859183.6U CN201820859183U CN208300006U CN 208300006 U CN208300006 U CN 208300006U CN 201820859183 U CN201820859183 U CN 201820859183U CN 208300006 U CN208300006 U CN 208300006U
- Authority
- CN
- China
- Prior art keywords
- signal
- infrasound
- power amplifier
- connect
- ultrasonic
- 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.)
- Active
Links
Abstract
The utility model provides a kind of Subsonic wave generator, is related to infrasound technical field, which includes user terminal and transmitter；User terminal includes sequentially connected infrasound signals generator, signal processor and power amplifier；Transmitter includes ultrasonic transducer emission array, and ultrasonic transducer emission array is connect with power amplifier；Infrasound signals generator generates the infrasonic sound digital signal within the scope of Infrasonic Frequencies；Signal processor infrasonic sound digital signal is carried to supersonic range be modulated and digital-to-analogue conversion obtain simulation ultrasonic signal；Power amplifier will simulate ultrasonic signal progress power amplification and obtain analog audio signal；Ultrasonic transducer emission array is to assigned direction launching simulation audio signal, to form the infrasound signal with directive property in air.The infrasound signals of low frequency are equipped on the ultrasonic carrier signal of high frequency by the Subsonic wave generator to be emitted, and infrasonic directional transmissions are realized.
Description
Technical field
The utility model relates to infrasound technical fields, more particularly, to a kind of Subsonic wave generator.
Background technique
Sound wave of the frequency less than 20Hz is called infrasound.Since infrasonic frequency is very low, so infrasound wavelength is very long,
Certain large obstacles can be got around, diffraction occurs；And infrasound is propagated be not easy to decay in air, therefore can propagate several kms
It is even farther.The infrasound of certain frequencies is due to close with the vibration frequency of human organ, once resonance is generated with human organ,
There is very strong nocuity to human body, it can causing death when dangerous.As scientific circles deepen continuously to infrasound research, infrasound
Have many advantages, such as that propagation distance is remote, penetration capacity is interfered gradually by electromagnetic environment by it has been found that in industrial production, doctor by force, not
The application for treating health, environmental monitoring and military affairs politics etc. also has attracted increasing attention.
Artificial at present time sound source is roughly divided into following three classes: (1) gas-explosion-type.Make gas with pulse using explosion or high pressure
Form discharges suddenly, and then ambient atmosphere is excited to generate low-frequency vibration, forms infrasound.(2) sympathetic response cavate.The formula infrasonic sound occurs
Principle of device generates infrasound similar to wind instrument, using the principle of resonance.(3) loudspeaker type.Utilize current excitation infrasonic sound loudspeaking
Device diaphragm vibration, to generate the infrasound of certain frequency.
Above-mentioned activity really is carried out using infrasound, it is necessary first to which solution is exactly infrasonic direction propagation problem.By
It is made not have directive property in the propagation of air in infrasonic very low frequency, and it is mostly gas explosion that current infrasound, which generates equipment,
Formula or piston type, a certain position convergence that infrasonic energy produced by can not making is specified in space, i.e., generated infrasonic sound
Wave is difficult to control in terms of directive property, and infrasound diverging is serious, influences subsequent research work.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Subsonic wave generator, to improve infrasonic finger
Tropism.
In a first aspect, the utility model embodiment provides a kind of Subsonic wave generator, including user terminal and hair
Penetrate machine；The user terminal includes sequentially connected infrasound signals generator, signal processor and power amplifier；The hair
The machine of penetrating includes ultrasonic transducer emission array, and the ultrasonic transducer emission array is connect with the power amplifier；
The infrasound signals generator is used to generate infrasonic sound digital signal within the scope of Infrasonic Frequencies, and by the infrasonic sound number
Word signal is sent to the signal processor；The signal processor is for carrying received infrasonic sound digital signal to supersonic frequency
Section is modulated and digital-to-analogue conversion, and exports modulated simulation ultrasonic signal to the power amplifier；The power amplification
Device is used to carry out received simulation ultrasonic signal power amplification, and the amplified analog audio signal of output power surpasses to described
Acoustic wave transducer emission array；The ultrasonic transducer emission array is for receiving the analog audio signal, and to specified
Direction emits the analog audio signal, to form the infrasound signal with directive property in air.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the signal processor includes modulation circuit and digital analog converter；
The input terminal of the modulation circuit is connect with the infrasound signals generator, the output end of the modulation circuit and institute
State digital analog converter connection；The modulation circuit is modulated for carrying received infrasonic sound digital signal to supersonic range,
And modulated digital ultrasound signal is exported to the digital analog converter；
The digital analog converter is connect with the power amplifier, and the digital analog converter is used for received digital ultrasound
Signal carries out digital-to-analogue conversion, and exports simulation ultrasonic signal to the power amplifier.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Two kinds of possible embodiments, wherein the signal processor further includes preprocessor, and the input terminal of the modulation circuit passes through
The preprocessor is connect with the infrasound signals generator；
The infrasonic sound digital signal that the preprocessor is used to send the infrasound signals generator carries out distortion pretreatment,
And pretreated infrasonic sound digital signal is exported to the modulation circuit.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein the modulation circuit includes the first multiplier, phase shifter, hilbert filter and the
Paired multiplier further includes adder or subtracter；
The first input end of first multiplier and the input terminal of the hilbert filter are believed with the infrasonic sound
The connection of number generator；Second input terminal of first multiplier is connect with the output end of the phase shifter, first multiplication
The output end of device is connect with the first input end of the adder or the subtracter；The output end of the hilbert filter
It is connect with the first input end of second multiplier；Second input of the input terminal of the phase shifter and second multiplier
End is connect with same supersonic signal generator respectively；The output end and the adder or the subtracter of second multiplier
The second input terminal connection；The output end of the adder or the subtracter is connect with the digital analog converter.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, the user terminal further includes shell, master control borad, display screen and operation panel；
The master control borad, the infrasound signals generator, the signal processor and the power amplifier are arranged at
In the shell；The display screen and the operation panel are arranged on the outer surface of the shell；The infrasound signals hair
Raw device, the power amplifier, the display screen and the operation panel are connect with the master control borad respectively；
The master control borad is used to obtain the setting parameter of user by the operation panel, and the setting parameter includes waveform
One of parameter, frequency parameter and power parameter are a variety of；The master control borad is also used to the waveform parameter, the frequency
Parameter is sent to the infrasound signals generator, the power parameter is sent to the power amplifier, and set described
It sets parameter and is sent to the display screen；The display screen is for showing the setting parameter.
The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Five kinds of possible embodiments, wherein the operation panel includes the equal waveform selection button connecting with the master control borad, frequency
Button, input keyboard and power regulating knob are set.
The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Six kinds of possible embodiments, wherein infrasound input interface is additionally provided on the outer surface of the shell, the infrasound is defeated
Incoming interface is connect with the signal processor；
The signal processor is also used to obtain infrasonic sound digital signal by the infrasound input interface.
The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Seven kinds of possible embodiments, wherein the transmitter further includes bracket and electric platform；The ultrasonic transducer emits battle array
Column are fixed on the electric platform, and the electric platform installation is on the bracket；The electric platform and the master control borad
Connection；
The setting parameter further includes direction parameter, and the master control borad is also used to the direction parameter being sent to the electricity
Dynamic holder, so as to drive the ultrasonic transducer emission array to turn to according to the direction parameter described for the electric platform
Assigned direction.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, the infrasound signals generator includes function signal generator；The ultrasonic transducer emission array includes multiple parallel connections
PZT (piezoelectric transducer) array element and bottom plate, multiple PZT (piezoelectric transducer) array element stationary arrangements are on the bottom plate.
The 8th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Nine kinds of possible embodiments, wherein the bottom plate has the cambered surface gathered to the assigned direction, multiple piezoelectric energy-conversions
Device array element is fixed in the cambered surface.
The utility model embodiment bring it is following the utility model has the advantages that
In the utility model embodiment, Subsonic wave generator includes user terminal and transmitter；User terminal packet
Include sequentially connected infrasound signals generator, signal processor and power amplifier；Transmitter includes ultrasonic transducer transmitting
Array, ultrasonic transducer emission array are connect with power amplifier；Infrasound signals generator is for generating Infrasonic Frequencies range
Interior infrasonic sound digital signal, and infrasonic sound digital signal is sent to signal processor；Signal processor is used for received infrasonic sound
Digital signal, which is carried to supersonic range, to be modulated and digital-to-analogue conversion, and exports modulated simulation ultrasonic signal to power amplification
Device；Power amplifier is used to carrying out received simulation ultrasonic signal into power amplification, and the amplified analogue audio frequency of output power
Signal is to ultrasonic transducer emission array；Ultrasonic transducer emission array is for receiving analog audio signal, and to specified
Direction launching simulation audio signal, to form the infrasound signal with directive property in air.The Subsonic wave generator will
The infrasound signals of low frequency, which are equipped on the ultrasonic carrier signal of high frequency, to be emitted, and is had when being propagated in air due to ultrasonic wave non-
Linear effect, the i.e. ultrasonic carrier of high frequency can decay rapidly from after demodulating in air, and infrasound itself is not easy to decay, therefore
The low frequency infrasound signal demodulated can be constantly superimposed along the direction of propagation of ultrasonic carrier, to realize infrasonic orientation
Transmitting, i.e., the Subsonic wave generator improves infrasonic directive property.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of Subsonic wave generator provided by the embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of modulation circuit provided by the embodiment of the utility model；
Fig. 3 is a kind of principle flow chart of signal modulation provided by the embodiment of the utility model；
Fig. 4 is a kind of appearance diagram of Subsonic wave generator provided by the embodiment of the utility model；
Fig. 5 is a kind of operation panel schematic diagram of user terminal provided by the embodiment of the utility model.
Icon:
100- user terminal；110- infrasound signals generator；120- signal processor；121- modulation circuit；122- number
Mode converter；123- preprocessor；130- power amplifier；140- shell；150- display screen；160- operation panel；161- wave
Shape select button；162- set of frequency button；163- input keyboard；164- power regulating knob；165- infrasound input interface；
Button is arranged in the orientation 166-；200- transmitter；210- ultrasonic transducer emission array；211- PZT (piezoelectric transducer) array element；212-
Bottom plate；220- bracket；230- electric platform.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
It is mostly gas-explosion-type or piston type that current infrasound, which generates equipment, and generated infrasound is difficult in terms of directive property
Control.Based on this, a kind of Subsonic wave generator provided by the embodiment of the utility model, using the sound parameter in nonlinear acoustics
Infrasonic directive property can be improved in theory.
A kind of infrasound disclosed in the utility model embodiment to occur below convenient for understanding the present embodiment
Device describes in detail.
Subsonic wave generator provided by the embodiment of the utility model applies the sound parameter theory in nonlinear acoustics
Infrasound generates aspect, completes infrasound directional transmissions based on parametric acoustic array, principle is to be equipped on the infrasound signals of low frequency
Nonlinear effect --- the ultrasonic carrier of high frequency on the ultrasonic carrier signal of high frequency, when being propagated in air using ultrasonic wave
Decay rapidly from after demodulating in air, demodulates low frequency infrasound signals and be constantly superimposed along the direction of propagation of ultrasonic carrier, and
Infrasound itself is not easy to decay, to realize the purpose of infrasound directional transmissions.
Fig. 1 is a kind of structural schematic diagram of Subsonic wave generator provided by the embodiment of the utility model, as shown in Figure 1,
The Subsonic wave generator includes user terminal 100 and transmitter 200；User terminal 100 includes sequentially connected infrasonic sound
Signal generator 110, signal processor 120 and power amplifier 130；Transmitter 200 includes ultrasonic transducer emission array
210, ultrasonic transducer emission array 210 is connect with power amplifier 130.
Infrasound signals generator 110 is used to generate the infrasonic sound digital signal within the scope of Infrasonic Frequencies, and infrasonic sound number is believed
Number it is sent to signal processor 120；Signal processor 120 is used to carry received infrasonic sound digital signal to supersonic range and carry out
Modulation and digital-to-analogue conversion, and modulated simulation ultrasonic signal is exported to power amplifier 130；Power amplifier 130 is used for will
Received simulation ultrasonic signal carries out power amplification, and the amplified analog audio signal of output power to ultrasonic transducer is sent out
Penetrate array 210；Ultrasonic transducer emission array 210 is for receiving analog audio signal, and to assigned direction launching simulation sound
Frequency signal.The analog audio signal passes through the parametric acoustic array effect generated in air medium, finally demodulates and most starts to design
Infrasound, i.e., in air formed have directive property infrasound signal.
Specifically, infrasound signals generator 110 can be waveform generator, and as follows sound signal generator 110 is function letter
Number acoustical generator generates the waveform signals such as sine wave, square wave, triangular wave.Transmitter 200 uses ultrasound transducer array technology, main
Syllabus: it 1. obtains bigger spatial gain, improve spatial resolution；2. the transient state for increasing transmitting sound power, improving audio frequency
Characteristic；3. improving signal-to-noise ratio；4. realizing multi beamforming, directive property required for being formed.
In the utility model embodiment, Subsonic wave generator includes user terminal and transmitter；User terminal packet
Include sequentially connected infrasound signals generator, signal processor and power amplifier；Transmitter includes ultrasonic transducer transmitting
Array, ultrasonic transducer emission array are connect with power amplifier；Infrasound signals generator is for generating Infrasonic Frequencies range
Interior infrasonic sound digital signal, and infrasonic sound digital signal is sent to signal processor；Signal processor is used for received infrasonic sound
Digital signal, which is carried to supersonic range, to be modulated and digital-to-analogue conversion, and exports modulated simulation ultrasonic signal to power amplification
Device；Power amplifier is used to carrying out received simulation ultrasonic signal into power amplification, and the amplified analogue audio frequency of output power
Signal is to ultrasonic transducer emission array；Ultrasonic transducer emission array is for receiving analog audio signal, and to specified
Direction launching simulation audio signal, to form the infrasound signal with directive property in air.The Subsonic wave generator will
The infrasound signals of low frequency, which are equipped on the ultrasonic carrier signal of high frequency, to be emitted, and is had when being propagated in air due to ultrasonic wave non-
Linear effect, the i.e. ultrasonic carrier of high frequency can decay rapidly from after demodulating in air, and infrasound itself is not easy to decay, therefore
The low frequency infrasound signal demodulated can be constantly superimposed along the direction of propagation of ultrasonic carrier, to realize infrasonic orientation
Transmitting, i.e., the Subsonic wave generator improves infrasonic directive property.
In some possible embodiments, as shown in Figure 1, signal processor 120 includes modulation circuit 121 and digital-to-analogue conversion
Device 122.Specifically, the input terminal of modulation circuit 121 is connect with infrasound signals generator 110, the output end of modulation circuit 121 with
Digital analog converter 122 connects；Modulation circuit 121 is modulated for carrying received infrasonic sound digital signal to supersonic range,
And modulated digital ultrasound signal is exported to digital analog converter 122.Digital analog converter 122 is connect with power amplifier 130, number
Mode converter 122 is used to carry out digital-to-analogue conversion to received digital ultrasound signal, and exports simulation ultrasonic signal to power amplification
Device 130.
In some possible embodiments, in order to enhance signal strength, reduce distortion, as shown in Figure 1, signal processor
120 further include preprocessor 123, and the input terminal of modulation circuit 121 is connected by preprocessor 123 and infrasound signals generator 110
It connects.The infrasonic sound digital signal that preprocessor 123 is used to send infrasound signals generator 110 carries out distortion pretreatment, and exports
Pretreated infrasonic sound digital signal is to modulation circuit 121.Preprocessor 123 carries out being distorted pretreated detailed process and can join
According to the prior art, which is not described herein again.
For the modulator approach of modulation circuit 121, the signal that is finally demodulated due to the signal equipped with ultrasonic carrier with
The second dervative of its envelope signal square is directly proportional (principle is described in detail below), therefore modulation circuit 121 can pass through
By the signal modulation finally propagated at equal with the second dervative of envelope signal square, the propagation of modulated signal is realized.Further
Ground can be such that the amplitude of ultrasonic carrier believes with modulation using the means of amplitude modulation (Amplitude Modulation, AM) modulation
Number variation and change.So on the one hand without changing carrier frequency, therefore the directive property for emitting sound wave will not be affected；It is another
The information carried on aspect amplitude-modulated signal envelope can be by sound parametric effect in air from demodulation, so that it may restore original tune
Signal processed.
In some possible embodiments, modulation circuit 121 uses phase shift method full carrier single sideband (Single
Sideband, SSB)-AM modulation.SSB modulation system only transmits the information (upper side band or lower sideband) of a sideband, relative to it
His modulation system has saved the frequency bandwidth of half, reduces the bandwidth requirement to transmitting transducer.It is in the transmitting of the system of saving
Power has certain advantage in terms of improving channel utilization.It is done in addition, SSB modulation system is easily realized and will not introduce harmonic wave
It disturbs, the form of final demodulated signal and the signal to be modulated of substitution are consistent.
Fig. 2 is a kind of structural schematic diagram of modulation circuit provided by the embodiment of the utility model, as shown in Fig. 2, based on upper
State phase shift method full carrier SSB-AM mode, the modulation circuit 121 include the first multiplier, phase shifter, hilbert filter and
Second multiplier further includes adder or subtracter.
Specifically, the input terminal of the first input end of the first multiplier and hilbert filter occurs with infrasound signals
Device 110 connects；Second input terminal of the first multiplier and the output end of phase shifter connect, the output end and addition of the first multiplier
The connection of the first input end of device or subtracter；The first input end of the output end of hilbert filter and the second multiplier connects
It connects；Second input terminal of the input terminal of phase shifter and the second multiplier is connect with same supersonic signal generator respectively；Second multiplies
The output end of musical instruments used in a Buddhist or Taoist mass is connect with the second input terminal of adder or subtracter；The output end and digital-to-analogue conversion of adder or subtracter
Device 122 connects.Wherein, supersonic signal generator can be sinusoidal signal generator, and the sinusoidal signal for exporting supersonic range passes through
The phase shift of phase shifter can become cosine signal.Supersonic signal generator can be accessed by outside, can also be built in this time
In sound wave generating device.
If signal processor 120 includes above-mentioned preprocessor 123, the first input end and Hilbert of the first multiplier
The input terminal of filter passes through preprocessor 123 and connect with infrasound signals generator 110.
Fig. 3 is a kind of principle flow chart of signal modulation provided by the embodiment of the utility model.Before describing Fig. 3, first
Illustrate the above-mentioned signal demodulated the theoretical principle directly proportional to the second dervative of envelope signal square, specific as follows:
Assuming that there is signal p1(t):
P1 (t)=p0E(t)cos2πf0t (1)
Wherein, p0For ultrasonic carrier signal amplitude；f0For carrier frequency；E (t) is envelope signal, and as the present embodiment is paid close attention to
Infrasound part.Known E (t) frequency variation be far smaller than (ultrasound) carrier wave, and sound wave decaying and frequency square at
Direct ratio is denoted as α so acoustic attenuation coefficient can be approximately acoustical absorptivity of the air to carrier wave in the communication process0.Therefore,
Acoustic pressure on acoustic propagation axis direction at a point x becomes:
Wherein k0=ω0/c0, it is the wave number of ultrasonic carrier；ω0=2 π f0, it is the circular frequency of ultrasonic carrier；c0For the velocity of sound.
To (2) formula both sides simultaneously square after obtain:
According to nonlinear acoustics theory, sound wave can be written as away from the Sound Source Center R acoustic pressure p (t) generated with formula in far field:
Wherein ρ0For atmospheric density.Because carrier frequency is high, 2 ω are contained in (3) formula0Xiang Douhui attenuate quickly, ignore
It is influenced.(3) formula is substituted into (4) formula and abbreviation, acoustical farfield solution such as formula (5) institute propagated along sound axis direction can be acquired
Show:
Wherein S is the diffusion area of sound source transducer array；β is nonlinear factor, β=1.4 of usual air.Therefore it asks
The signal that generation must finally be demodulated is directly proportional to the second dervative of envelope signal square.
Based on the above principles, modulated process as shown in Figure 3 is proposed.As shown in figure 3, infrasound signals generator 110 is defeated
Infrasonic sound digital signal g (t) out is first modulated into 1+mg (t), and wherein m is the index of modulation, and 1 indicates DC component.sinω0T is
The sinusoidal signal of the supersonic range of supersonic signal generator output, cos ω0T is that the sinusoidal signal is obtained by the phase shift of phase shifter
The cosine signal arrived.When signal 1+mg (t) is through Hilbert filter transform, because the Hilbert transformation of DC component is not present,
Corresponding frequency amplitude response is 0 in practice, therefore after signal to be modulated (infrasonic sound digital signal) g (t) passes through the modulation circuit,
Obtained modulated signal (digital ultrasound signal) are as follows:
In formula (6), sideband is removed in "+" expression, and "-" expression takes upper side band.Represent the Hilbert transformation of g (t).
It, can the modulated letter of an optional sideband (such as upper side band) conduct since lower sideband maintains same information
Number by digital analog converter 122 carry out digital to analog conversion, obtain signal Y (t).Signal Y (t) ingoing power amplifier 130 carries out function
Rate amplification, amplified signal enters ultrasonic transducer emission array 210 and launches outward sound wave Y (t), finally shape in air
At the infrasound with directive property.
In addition, the input signal of modulation circuit is single-frequency in the present embodiment, after being demodulated certainly using SSB-AM modulation in signal
Not comprising harmonic components, there is no distortions.
Fig. 4 is a kind of appearance diagram of Subsonic wave generator provided by the embodiment of the utility model.In view of existing
Artificial sound source device is all difficult to control generated infrasonic waveform, frequency, power etc., in above-described embodiment one
On the basis of, as shown in figure 4, user terminal 100 further includes shell 140, master control borad, display screen 150 and operation panel 160.
Specifically, master control borad, infrasound signals generator 110, signal processor 120 and power amplifier 130 are arranged at
In shell 140.Display screen 150 and operation panel 160 are arranged on the outer surface of shell 140, and the two is preferably provided at shell
140 same outer surface, observation convenient for the user to operate.Infrasound signals generator 110, power amplifier 130,150 and of display screen
Operation panel 160 is connect with master control borad respectively；Master control borad is used to obtain the setting parameter of user by operation panel 160, this sets
Setting parameter includes one of waveform parameter, frequency parameter and power parameter or a variety of；Master control borad is also used to waveform parameter, frequency
Rate parameter is sent to infrasound signals generator 110, and power parameter is sent to power amplifier 130, and by the setting parameter
It is sent to display screen 150.Display screen 150 is for showing the setting parameter.User can directly pass through operation panel very much in this way
The parameters such as type of waveform, frequency height, the watt level of 160 pairs of infrasonic sound digital signals control.
As shown in Figure 1 and Figure 4, the control to 200 launch azimuth of transmitter for convenience, the transmitter 200 further include branch
Frame 220 and electric platform 230.Ultrasonic transducer emission array 210 is fixed on electric platform 230, and electric platform 230 is installed
On bracket 220；Electric platform 230 is connect with above-mentioned master control borad.Above-mentioned setting parameter further includes direction parameter, and master control borad is also used
In direction parameter is sent to electric platform 230, so that electric platform 230 drives ultrasonic transducer to send out according to the direction parameter
It penetrates array 210 and turns to assigned direction.Specifically, electric platform 230 includes motor, drives ultrasonic waves by the rotation of motor
The rotation of energy device emission array 210.
As shown in figure 4, ultrasonic transducer emission array 210 includes PZT (piezoelectric transducer) array element 211 and the bottom of multiple parallel connections
Plate 212, multiple 211 stationary arrangements of PZT (piezoelectric transducer) array element are on bottom plate 212.Multiple PZT (piezoelectric transducer) array elements 211 are pressed certain
Pitch requirements aligned transfer forms transducer array.Bottom plate 212 can be movable, and bottom plate 212 can be (electronic by rear side motor
The motor of holder 230) rotation is controlled, specific rotational angle is inputted by user by operation panel 160.
As shown in figure 4, in order to further increase infrasonic directive property, bottom plate 212 has the arc gathered to assigned direction
Face, multiple PZT (piezoelectric transducer) array elements 211 are fixed in the cambered surface.
Fig. 5 is a kind of operation panel schematic diagram of user terminal provided by the embodiment of the utility model, as shown in figure 5,
Operation panel 160 includes waveform selection button 161, set of frequency button 162,163 and of input keyboard being all connected with the main control board
Power regulating knob 164.Specifically, waveform selection button 161 includes " sine " button, " square wave " button and " triangle " button.
Input keyboard 163 includes digital button, punctuate button and function button (return and delete button, remove button and ACK button etc.).Separately
Outside, operation panel 160 can also include " switch " key, screenshotss button and USB (Universal Serial Bus, general serial
Bus) connector.
Infrasonic sound digital signal is obtained from outside in order to facilitate user, as shown in figure 5, also setting up on the outer surface of shell 140
There is infrasound input interface 165 (" input " interface in Fig. 5), infrasound input interface 165 is connect with signal processor 120；
Signal processor 120 is also used to obtain infrasonic sound digital signal by infrasound input interface 165.
In order to control the launch azimuth of transmitter 200, as shown in figure 5, operation panel 160 further includes orientation setting button
166, it includes "horizontal" button and " pitching " button that button 166, which is arranged, in orientation.
Specific implementation step based on Fig. 5, the operation panel 160 is as follows:
" switch " key in user terminal 100 is pressed first, and power supply indicator " POWER " brightens, what selection to be carried
Infrasonic sound digital signal waveform is built-in with sine wave, square wave, triangular wave, respectively by press " sine " button, " square wave " button with
" triangle " button obtains.
Next infrasonic sound digital signal frequency is configured, is realized by the input keyboard 163 on operation panel 160.
When setting mistake, press(return and delete button) delete, and presses(removing button) zeros data, user terminal
100 reset.
The infrasonic sound digital signal that other instruments generation also can be used simultaneously, first selects the Custom button, then uses
The infrasonic sound digital signal that other instruments equipment occurs coaxial wire by " input " interface (infrasound input interface 165) and
User terminal 100 connects.
It presses(ACK button) button sets the infrasonic sound digital signal of parameter just as the method previously described in user
It is modulated inside terminating machine 100, and is emitted by transmitter 200.Pass through the power regulating knob of 160 rightmost side of operation panel
164, complete the control to signal power.
When controlling 200 angle of transmitter, completed respectively by "horizontal" button and " pitching " button.Press " water
It is flat " button, specific angle value is inputted by input keyboard 163, completes the control to angle is horizontally rotated；" pitching " is pressed to press
Button inputs specific angle value by input keyboard 163, completes the control to pitch rotation angle, pressButton confirmation, hair
It penetrates electric platform 230 on machine 200 and receives instruction, turn to corresponding angle.
Ultrasonic wave waveform and various parameters (waveform, frequency and the final transmitting sound power, transmitting generated after modulation
The corner of machine 200) it can all be shown on display screen 150, it presses(screenshotss button) intercepts current screen and shows content, passes through
USB connector is connect with External memory equipment, and completes to save.
In summary, Subsonic wave generator provided in this embodiment has the advantages that
1, infrasonic synthesis is carried out using parametric acoustic array theory, obtained infrasound directive property is stronger；
2, using digital circuit technique, device is more exquisite, the control to parameters such as infrasonic sound wave frequency rate, waveform, launch azimuths
It makes more accurate；
3, ultrasonic transducer emission array 210 has been used rather than single energy converter is as sound source, so that infrasound
Directive property and power have been further upgraded；
4, the control to entire Subsonic wave generator is completed by operation panel 160, operated more simple.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustratively, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In embodiment provided herein, it should be understood that disclosed device, it can be real by another way
It is existing.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only a kind of logic function
It can divide, there may be another division manner in actual implementation, in another example, multiple units or components can combine or can collect
At another system is arrived, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling
Conjunction or direct-coupling or communication connection can be the indirect coupling or communication connection by some communication interfaces, device or unit,
It can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in the utility model embodiment can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of Subsonic wave generator, which is characterized in that including user terminal and transmitter；The user terminal includes
Sequentially connected infrasound signals generator, signal processor and power amplifier；The transmitter includes ultrasonic transducer hair
Array is penetrated, the ultrasonic transducer emission array is connect with the power amplifier；
The infrasound signals generator is used to generate the infrasonic sound digital signal within the scope of Infrasonic Frequencies, and the infrasonic sound number is believed
Number it is sent to the signal processor；The signal processor be used for by received infrasonic sound digital signal carry to supersonic range into
Row modulation and digital-to-analogue conversion, and modulated simulation ultrasonic signal is exported to the power amplifier；The power amplifier is used
In received simulation ultrasonic signal is carried out power amplification, and the amplified analog audio signal of output power is to the ultrasonic wave
Energy converter emission array；The ultrasonic transducer emission array is for receiving the analog audio signal, and to assigned direction
Emit the analog audio signal, to form the infrasound signal with directive property in air.
2. Subsonic wave generator according to claim 1, which is characterized in that the signal processor includes modulation circuit
And digital analog converter；
The input terminal of the modulation circuit is connect with the infrasound signals generator, the output end of the modulation circuit and the number
Mode converter connection；The modulation circuit is modulated for carrying received infrasonic sound digital signal to supersonic range, and defeated
Modulated digital ultrasound signal is to the digital analog converter out；
The digital analog converter is connect with the power amplifier, and the digital analog converter is used for received digital ultrasound signal
Digital-to-analogue conversion is carried out, and exports simulation ultrasonic signal to the power amplifier.
3. Subsonic wave generator according to claim 2, which is characterized in that the signal processor further includes pretreatment
The input terminal of device, the modulation circuit is connect by the preprocessor with the infrasound signals generator；
The infrasonic sound digital signal that the preprocessor is used to send the infrasound signals generator carries out distortion pretreatment, and defeated
Pretreated infrasonic sound digital signal is to the modulation circuit out.
4. Subsonic wave generator according to claim 2, which is characterized in that the modulation circuit includes the first multiplication
Device, phase shifter, hilbert filter and the second multiplier further include adder or subtracter；
The first input end of first multiplier and the input terminal of the hilbert filter are sent out with the infrasound signals
Raw device connection；Second input terminal of first multiplier is connect with the output end of the phase shifter, first multiplier
Output end is connect with the first input end of the adder or the subtracter；The output end of the hilbert filter and institute
State the first input end connection of the second multiplier；Second input terminal of the input terminal of the phase shifter and second multiplier point
It is not connect with same supersonic signal generator；The of the output end of second multiplier and the adder or the subtracter
The connection of two input terminals；The output end of the adder or the subtracter is connect with the digital analog converter.
5. Subsonic wave generator according to claim 1, which is characterized in that the user terminal further include shell,
Master control borad, display screen and operation panel；
The master control borad, the infrasound signals generator, the signal processor and the power amplifier are arranged at described
In shell；The display screen and the operation panel are arranged on the outer surface of the shell；The infrasound signals generator,
The power amplifier, the display screen and the operation panel are connect with the master control borad respectively；
The master control borad is used to obtain the setting parameter of user by the operation panel, and the setting parameter includes waveform ginseng
One of number, frequency parameter and power parameter are a variety of；The master control borad is also used to join the waveform parameter, the frequency
Number is sent to the infrasound signals generator, and the power parameter is sent to the power amplifier, and by the setting
Parameter is sent to the display screen；The display screen is for showing the setting parameter.
6. Subsonic wave generator according to claim 5, which is characterized in that the operation panel include with the master
Control waveform selection button, set of frequency button, input keyboard and the power regulating knob of plate connection.
7. Subsonic wave generator according to claim 5, which is characterized in that be additionally provided on the outer surface of the shell
Infrasound input interface, the infrasound input interface are connect with the signal processor；
The signal processor is also used to obtain infrasonic sound digital signal by the infrasound input interface.
8. Subsonic wave generator according to claim 5, which is characterized in that the transmitter further includes bracket and electronic
Holder；The ultrasonic transducer emission array is fixed on the electric platform, and the electric platform is mounted on the bracket
On；The electric platform is connect with the master control borad；
The setting parameter further includes direction parameter, and the master control borad is also used to for the direction parameter to be sent to the electronic cloud
Platform, so that the electric platform drives the ultrasonic transducer emission array to turn to described specify according to the direction parameter
Direction.
9. Subsonic wave generator according to claim 1, which is characterized in that the infrasound signals generator includes function
Signal generator；The ultrasonic transducer emission array includes the PZT (piezoelectric transducer) array element and bottom plate of multiple parallel connections, Duo Gesuo
PZT (piezoelectric transducer) array element stationary arrangement is stated on the bottom plate.
10. Subsonic wave generator according to claim 9, which is characterized in that the bottom plate has to the designated parties
To the cambered surface gathered, multiple PZT (piezoelectric transducer) array elements are fixed in the cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820859183.6U CN208300006U (en) | 2018-06-04 | 2018-06-04 | Subsonic wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820859183.6U CN208300006U (en) | 2018-06-04 | 2018-06-04 | Subsonic wave generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208300006U true CN208300006U (en) | 2018-12-28 |
Family
ID=64723580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820859183.6U Active CN208300006U (en) | 2018-06-04 | 2018-06-04 | Subsonic wave generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208300006U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513222A (en) * | 2018-06-04 | 2018-09-07 | 中国人民解放军火箭军工程大学 | Subsonic wave generator |
| CN110138458A (en) * | 2019-06-04 | 2019-08-16 | 南京华格信息技术有限公司 | A kind of sound wave remotely orients pack transmitting implementation method |
| CN110731896A (en) * | 2019-10-23 | 2020-01-31 | 南通东峘电子科技有限公司 | High-energy infrasonic sound wave instrument |
| IT201900022896A1 (en) * | 2019-12-05 | 2021-06-05 | Sonolab Di Villa Pasquale | VIBRATION DEVICE IN THE INFRASOUND FREQUENCIES IN CONTACT WITH THE DERMA |
-
2018
- 2018-06-04 CN CN201820859183.6U patent/CN208300006U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513222A (en) * | 2018-06-04 | 2018-09-07 | 中国人民解放军火箭军工程大学 | Subsonic wave generator |
| CN110138458A (en) * | 2019-06-04 | 2019-08-16 | 南京华格信息技术有限公司 | A kind of sound wave remotely orients pack transmitting implementation method |
| CN110731896A (en) * | 2019-10-23 | 2020-01-31 | 南通东峘电子科技有限公司 | High-energy infrasonic sound wave instrument |
| IT201900022896A1 (en) * | 2019-12-05 | 2021-06-05 | Sonolab Di Villa Pasquale | VIBRATION DEVICE IN THE INFRASOUND FREQUENCIES IN CONTACT WITH THE DERMA |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208300006U (en) | Subsonic wave generator | |
| JP5683788B2 (en) | Sonar system, sonar transmission / reception module, and method of transmitting / receiving in a sonar system | |
| Aoki et al. | Parametric loudspeaker—characteristics of acoustic field and suitable modulation of carrier ultrasound | |
| Kite et al. | Parametric array in air: Distortion reduction by preprocessing | |
| CN107645694B (en) | A kind of orientation acoustic emission apparatus and method for bird repellent | |
| CN101790118A (en) | Audio-frequency directional loudspeaker system and signal processing method thereof | |
| CN204031425U (en) | Active directional loudspeaker | |
| CN104683907A (en) | Directional transmission device | |
| CN101583064A (en) | Micro audio directional loudspeaker with three dimension soundeffect | |
| CN108513222A (en) | Subsonic wave generator | |
| CN111818422B (en) | Fixed-point sound wave transmitting device based on parametric array principle | |
| CN107708041A (en) | A kind of audio beam loudspeaker | |
| CN106937206A (en) | A kind of mobile phone screen orients sonification system | |
| CN101453679A (en) | Parametric array loudspeaker, signal processing method thereof | |
| CN102547517B (en) | Bass signal harmonic generating method and device and sound playing equipment | |
| KR101081877B1 (en) | Apparatus and method for transmitting and receiving a sound in air using a parametric array | |
| Shi et al. | A comparative study of preprocessing methods in the parametric loudspeaker | |
| CN101111096A (en) | Combined sound frequency orienting ultrasound wave loud-speaker system | |
| CN110784799A (en) | Sound directional transmission method and system | |
| CN113630687A (en) | Phased parametric array-based infrasonic wave directional transmitting system and method | |
| CN112509541A (en) | Small-size low-frequency non-resonant underwater acoustic transducer and system applied to active sound absorption | |
| CN101984555B (en) | Parametric array audio play system | |
| JPS58119293A (en) | Electroacoustic transducer | |
| CN206894869U (en) | A kind of mobile phone screen orients sonification system | |
| CN203368720U (en) | Directive sound source system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |