CN108513222A - Subsonic wave generator - Google Patents
Subsonic wave generator Download PDFInfo
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- CN108513222A CN108513222A CN201810567542.5A CN201810567542A CN108513222A CN 108513222 A CN108513222 A CN 108513222A CN 201810567542 A CN201810567542 A CN 201810567542A CN 108513222 A CN108513222 A CN 108513222A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
The present invention provides a kind of Subsonic wave generators, are related to infrasound technical field, which includes user terminal and transmitter；User terminal includes infrasound signals generator, signal processor and power amplifier connected in sequence；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 present invention relates to infrasound technical fields, more particularly, to a kind of Subsonic wave generator.
Background technology
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 several kms can be propagated
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
Treating the application of 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.It is raised one's voice using current excitation infrasonic sound
Device diaphragm vibration, to generate the infrasound of certain frequency.
Really above-mentioned activity 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 is specified in space produced by can not making, i.e., generated infrasonic sound
Wave is difficult to control in terms of directive property, and infrasound diverging is serious, influences subsequent research work.
Invention content
In view of this, the purpose of the present invention is to provide a kind of Subsonic wave generator, to improve infrasonic directive property.
In a first aspect, an embodiment of the present invention provides a kind of Subsonic wave generator, including user terminal and transmitter；
The user terminal includes infrasound signals generator, signal processor and power amplifier connected in sequence；The transmitter
Including ultrasonic transducer emission array, 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 the infrasonic sound digital signal of reception to supersonic frequency
Section is modulated and digital-to-analogue conversion, and exports modulated simulation ultrasonic signal to the power amplifier；The power amplification
The simulation ultrasonic signal that device is used to receive carries out 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, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
It includes modulation circuit and digital analog converter to state signal processor；
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 the infrasonic sound digital signal of reception 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 the digital ultrasound to reception
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, an embodiment of the present invention provides second of first aspect
Possible embodiment, wherein the signal processor further includes preprocessor, and the input terminal of the modulation circuit is described in
Preprocessor is connect with the infrasound signals generator；
The infrasonic sound digital signal that the preprocessor is used to send the infrasound signals generator is pre-processed into line distortion,
And pretreated infrasonic sound digital signal is exported to the modulation circuit.
The possible embodiment of with reference to first aspect the first, an embodiment of the present invention provides the third of first aspect
Possible embodiment, wherein the modulation circuit multiplies including the first multiplier, phase shifter, hilbert filter and second
Musical instruments used in a Buddhist or Taoist mass 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 of second multiplier and the adder or the subtracter
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, an embodiment of the present invention provides the 4th kind of possible embodiments of first aspect, wherein institute
It further includes shell, master control borad, display screen and operation panel to state user terminal；
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 arrange parameter of user by the operation panel, and the arrange parameter includes waveform
It is one or more in parameter, frequency parameter and power parameter；The master control borad is additionally operable 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 arrange parameter.
The 4th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 5th kind of first aspect
Possible embodiment, wherein the operation panel includes equal waveform selection button, the set of frequency being connect with the master control borad
Button, input keyboard and power regulating knob.
The 4th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 6th kind of first aspect
Possible embodiment, wherein infrasound input interface is additionally provided on the outer surface of the shell, the infrasound input connects
Mouth is connect with the signal processor；
The signal processor is additionally operable to obtain infrasonic sound digital signal by the infrasound input interface.
The 4th kind of possible embodiment with reference to first aspect, an embodiment of the present invention provides the 7th kind of first aspect
Possible embodiment, wherein the transmitter further includes holder and electric platform；The ultrasonic transducer emission array is solid
It is scheduled on the electric platform, the electric platform installation is on the bracket；The electric platform is connect with the master control borad；
The arrange parameter further includes direction parameter, and the master control borad is additionally operable 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, an embodiment of the present invention provides the 8th kind of possible embodiments of first aspect, wherein institute
It includes function signal generator to state infrasound signals generator；The ultrasonic transducer emission array includes the piezoelectricity of multiple parallel connections
Energy converter 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, an embodiment of the present invention provides the 9th kind of first aspect
Possible embodiment, wherein the bottom plate has the cambered surface gathered to the assigned direction, multiple PZT (piezoelectric transducer) battle arrays
Member is fixed in the cambered surface.
The embodiment of the present invention brings following advantageous effect：
In the embodiment of the present invention, Subsonic wave generator includes user terminal and transmitter；User terminal includes suitable
Infrasound signals generator, signal processor and the power amplifier of secondary connection；Transmitter includes ultrasonic transducer emission array,
Ultrasonic transducer emission array is connect with power amplifier；Infrasound signals generator is used to generate time within the scope of Infrasonic Frequencies
Sound digital signal, and infrasonic sound digital signal is sent to signal processor；The infrasonic sound number letter that signal processor is used to receive
It number carries and to be modulated to supersonic range and digital-to-analogue conversion, and export modulated simulation ultrasonic signal to power amplifier；Work(
The simulation ultrasonic signal that rate amplifier is used to receive carries out power amplification, and the amplified analog audio signal of output power is extremely
Ultrasonic transducer emission array；Ultrasonic transducer emission array is sent out for receiving analog audio signal, and to assigned direction
Analog audio signal is penetrated, to form the infrasound signal with directive property in air.The Subsonic wave generator is by low frequency
Infrasound signals, which are equipped on the ultrasonic carrier signal of high frequency, to be emitted, and has non-linear effect when being propagated in air due to ultrasonic wave
It answers, i.e., the ultrasonic carrier of high frequency can decay rapidly from after demodulating in air, and infrasound itself is not easy to decay, therefore demodulate
Low frequency infrasound signal can be constantly superimposed along the direction of propagation of ultrasonic carrier, to realize infrasonic directional transmissions,
I.e. the Subsonic wave generator improves infrasonic directive property.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification and attached drawing
Specifically noted structure is realized and is obtained.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structural schematic diagram of Subsonic wave generator provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of modulation circuit provided in an embodiment of the present invention；
Fig. 3 is a kind of principle flow chart of signal modulation provided in an embodiment of the present invention；
Fig. 4 is a kind of appearance diagram of Subsonic wave generator provided in an embodiment of the present invention；
Fig. 5 is a kind of operation panel schematic diagram of user terminal provided in an embodiment of the present invention.
Icon：
100- user terminals；110- infrasound signals generators；120- signal processors；121- modulation circuits；122- numbers
Mode converter；123- preprocessors；130- power amplifiers；140- shells；150- display screens；160- operation panels；161- waves
Shape select button；162- set of frequency buttons；163- inputs keyboard；164- power regulating knobs；165- infrasound input interfaces；
Button is arranged in the orientation 166-；200- transmitters；210- ultrasonic transducer emission arrays；211- PZT (piezoelectric transducer) array elements；212-
Bottom plate；220- holders；230- electric platforms.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
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 in an embodiment of the present invention is managed using the sound parameter in nonlinear acoustics
By infrasonic directive property can be improved.
For ease of understanding the present embodiment, below to a kind of Subsonic wave generator disclosed in the embodiment of the present invention
It describes in detail.
Subsonic wave generator provided in an embodiment of the present invention applies the sound parameter theory in nonlinear acoustics in infrasonic sound
In terms of wave generation, infrasound directional transmissions are completed based on parametric acoustic array, principle is that the infrasound signals of low frequency are equipped on high frequency
Ultrasonic carrier signal on, the ultrasonic carrier of nonlinear effect when being propagated in air using ultrasonic wave --- high frequency is in sky
Decay rapidly from after demodulating in gas, demodulates low frequency infrasound signals and be constantly superimposed along the direction of propagation of ultrasonic carrier, and infrasonic sound
Wave 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 in an embodiment of the present invention, as shown in Figure 1, this time
Sound wave generating device includes user terminal 100 and transmitter 200；User terminal 100 includes infrasound signals connected in sequence
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 the infrasonic sound digital signal of reception 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
The simulation ultrasonic signal of reception 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 finally demodulates by the parametric acoustic array effect generated in air medium and most starts to design
Infrasound, i.e., in air formed with directive property infrasound signal.
Specifically, infrasound signals generator 110 can be waveform generator, and as follows sound signal generator 110 is believed for function
Number acoustical generator generates the waveform signals such as sine wave, square wave, triangular wave.Transmitter 200 uses ultrasound transducer array technology, main
Syllabus is：1. obtaining the spatial gain of bigger, improving 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, required directive property is formed.
In the embodiment of the present invention, Subsonic wave generator includes user terminal and transmitter；User terminal includes suitable
Infrasound signals generator, signal processor and the power amplifier of secondary connection；Transmitter includes ultrasonic transducer emission array,
Ultrasonic transducer emission array is connect with power amplifier；Infrasound signals generator is used to generate time within the scope of Infrasonic Frequencies
Sound digital signal, and infrasonic sound digital signal is sent to signal processor；The infrasonic sound number letter that signal processor is used to receive
It number carries and to be modulated to supersonic range and digital-to-analogue conversion, and export modulated simulation ultrasonic signal to power amplifier；Work(
The simulation ultrasonic signal that rate amplifier is used to receive carries out power amplification, and the amplified analog audio signal of output power is extremely
Ultrasonic transducer emission array；Ultrasonic transducer emission array is sent out for receiving analog audio signal, and to assigned direction
Analog audio signal is penetrated, to form the infrasound signal with directive property in air.The Subsonic wave generator is by low frequency
Infrasound signals, which are equipped on the ultrasonic carrier signal of high frequency, to be emitted, and has non-linear effect when being propagated in air due to ultrasonic wave
It answers, i.e., the ultrasonic carrier of high frequency can decay rapidly from after demodulating in air, and infrasound itself is not easy to decay, therefore demodulate
Low frequency infrasound signal can be constantly superimposed along the direction of propagation of ultrasonic carrier, to realize infrasonic directional transmissions,
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 the infrasonic sound digital signal of reception 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 the digital ultrasound signal of reception, 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 is pre-processed into line distortion, and is exported
Pretreated infrasonic sound digital signal is to modulation circuit 121.Preprocessor 123 can join into the pretreated detailed process of line distortion
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
The means of amplitude modulation (Amplitude Modulation, AM) modulation may be used in ground, make the amplitude of ultrasonic carrier as modulation is believed
Number variation and change.So on the one hand without changing carrier frequency, therefore emitting the directive property of 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 to restore original tune
Signal processed.
In some possible embodiments, modulation circuit 121 is using phase shift method full carrier single sideband (Single
Sideband, SSB)-AM modulation.SSB modulation systems only transmit 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 systems are easily realized and will not introduce harmonic wave
It disturbs, the form of final demodulated signal is consistent with the signal to be modulated of substitution.
Fig. 2 is a kind of structural schematic diagram of modulation circuit provided in an embodiment of the present invention, as shown in Fig. 2, being based on above-mentioned phase
Shifting method full carrier SSB-AM modes, 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 first input end of device or subtracter connects；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 is connect by preprocessor 123 with infrasound signals generator 110.
Fig. 3 is a kind of principle flow chart of signal modulation provided in an embodiment of the present invention.Before describing Fig. 3, first illustrate
The above-mentioned signal demodulated the theoretical principle directly proportional to the second dervative of envelope signal square, it is specific as follows：
Assuming that there is signal p1(t):
p1(t)=p0E(t)cos2πf0t (I)
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, you can acquire acoustical farfield solution such as formula (5) institute propagated along sound axis direction
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 above-mentioned principle, it is proposed that modulated process as shown in Figure 3.As shown in figure 3, infrasound signals generator 110 is defeated
The infrasonic sound digital signal g (t) gone 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 transforms, 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) is by the modulation circuit,
Obtained modulated signal (digital ultrasound signal) is：
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 powers amplifier 130 carries out work(
Rate is amplified, and amplified signal enters the transmitting sound wave Y (t) outward of ultrasonic transducer emission array 210, 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, using SSB-AM modulation from signal after demodulation
Not comprising harmonic components, there is no distortions.
Fig. 4 is a kind of appearance diagram of Subsonic wave generator provided in an embodiment of the present invention.In view of existing artificial
Secondary sound source device is all difficult to control generated infrasonic waveform, frequency, power etc., in the base of above-described embodiment one
On plinth, 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 arrange parameter of user by operation panel 160, this sets
It includes one or more in waveform parameter, frequency parameter and power parameter to set parameter；Master control borad is additionally operable 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 arrange parameter
It is sent to display screen 150.Display screen 150 is for showing the arrange 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 holder 220；Electric platform 230 is connect with above-mentioned master control borad.Above-mentioned arrange 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, and ultrasonic waves are driven 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 in an embodiment of the present invention, as shown in figure 5, operation
Panel 160 includes the waveform selection button 161 being connect with master control borad, set of frequency button 162, input keyboard 163 and power
Adjusting 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.).In addition, behaviour
It can also includes " switch " key, screenshotss button and USB (Universal Serial Bus, universal serial bus) to make panel 160
Connector.
Infrasonic sound digital signal is obtained from outside in order to facilitate user, as shown in figure 5, being also set 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 additionally operable 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 and
" 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 can also be used to generate 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) with
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 inputting keyboard 163, completes the control to horizontally rotating angle；" pitching " is pressed to press
Button inputs specific angle value by inputting keyboard 163, completes the control to pitch rotation angle, pressButton confirms, sends out
It penetrates electric platform 230 on machine 200 and receives instruction, turn to corresponding angle.
Ultrasonic wave waveform and various parameters (waveform, frequency and final transmitting sound power, the 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 connectors are connect with External memory equipment, and complete to preserve.
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
System is 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, operation is more simple.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustrative, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply 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 work(
It can divide, formula that in actual implementation, there may be another division manner, in another example, multiple units or component can combine or can collect
At to another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling
Close or direct-coupling or communication connection can be by some communication interfaces, the INDIRECT COUPLING or communication connection of device or unit,
Can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in embodiments of the present invention can be integrated in a processing unit, can also be each
A unit physically exists alone, can also be during two or more units are integrated in one unit.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of Subsonic wave generator, which is characterized in that including user terminal and transmitter；The user terminal includes
Infrasound signals generator, signal processor and power amplifier connected in sequence；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 the infrasonic sound digital signal of reception 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
Power amplification is carried out in the simulation ultrasonic signal that will receive, 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 connects；The modulation circuit is modulated for carrying the infrasonic sound digital signal of reception to supersonic range, and defeated
Go out modulated digital ultrasound signal to the digital analog converter；
The digital analog converter is connect with the power amplifier, and the digital analog converter is used for the digital ultrasound signal to reception
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 is pre-processed into line distortion, and defeated
Go out pretreated infrasonic sound digital signal to the modulation circuit.
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
Two input terminals connect；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 arrange parameter of user by the operation panel, and the arrange parameter includes waveform ginseng
It is one or more in number, frequency parameter and power parameter；The master control borad is additionally operable 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 arrange 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 additionally operable 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 holder and electronic
Holder；The ultrasonic transducer emission array is fixed on the electric platform, and the electric platform is mounted on the holder
On；The electric platform is connect with the master control borad；
The arrange parameter further includes direction parameter, and the master control borad is additionally operable to the direction parameter being 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810567542.5A CN108513222A (en) | 2018-06-04 | 2018-06-04 | Subsonic wave generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810567542.5A CN108513222A (en) | 2018-06-04 | 2018-06-04 | Subsonic wave generator |
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| CN108513222A true CN108513222A (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN (1) | CN108513222A (en) |
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| CN111134681A (en) * | 2018-11-06 | 2020-05-12 | 中国科学院声学研究所 | Signal processing method and system for enhancing underwater strong acoustic biological effect |
| CN116366169A (en) * | 2023-06-01 | 2023-06-30 | 浙江大学 | Ultrasonic channel modeling method, electronic device and storage medium |
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