CN106949958A - A kind of acoustic signals detection method based on Liu cos chaos systems - Google Patents
A kind of acoustic signals detection method based on Liu cos chaos systems Download PDFInfo
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Abstract
A kind of acoustic signals detection method based on Liu cos chaos systems launches the acoustic signals of one group of cosine wave that assigned frequency is w in advance with pinger to acoustic receiver, acoustic receiver receives the cosine wave electric wave signal that same frequency is converted the signal into after the acoustic signals of this cosine wave, is input to Liu cos chaos systems.The voltage waveform that regulation Liu cos chaos system parameters export variable y and z before signal is received is chaotic waves.If the voltage waveform of Liu cos chaos system variables y or z output is changed into close to 0V DC voltages from chaotic waves, represent acoustic receiver receive one in advance assigned frequency for w faint cosine wave (or square wave) acoustic signals.If the voltage waveform of Liu cos chaos system variables y or z output is still chaotic waves, represent acoustic receiver do not receive one in advance assigned frequency for w faint cosine wave (or square wave) acoustic signals.This method differentiates that process is simple, easily realized, alternative traditional acoustic detection technique.
Description
Technical field
The present invention relates to signal detection field, more particularly to a kind of acoustic signals detection based on Liu-cos chaos systems
Method.
Background technology
In acoustic signals detection, traditional method is first to be amplified acoustic signals and filtering process, is then changed
Identification is detected for electric signal.The antijamming capability of this detection method is weak and cannot be distinguished by the close cosine wave of frequency
The acoustic signals of (or square wave), Detection results are not good.Current people, which have been verified that, examines Duffing chaos systems for sound wave
Survey the feasibility of signal.Because variable x and the y output voltage waveforms of Duffing chaos systems only have two kinds of chaos and cosine wave
State, and both states waveform close to being difficult to distinguish, thus its effective acoustic signals detection of progress can not be utilized.
The content of the invention
Present invention aims at a kind of acoustic signals detection method based on Liu-cos chaos systems is provided, cosine is realized
The detection and identification of the acoustic signals of ripple (or square wave).
To achieve the above object, following technical scheme is employed：The inventive method includes transmitting, receives and recognizes three mistakes
Journey, methods described step is as follows：
Step 1, manufacture cosine wave (or square wave) pinger and acoustic receiver；
Step 2, manufacture Liu chaos systems and cosine function are combined obtained Liu-cos chaos systems；
Step 3, launched and Liu-cos chaos system cosine functions Racos to acoustic receiver using pinger
(wt) frequency is all w one group of cosine wave (or square wave) acoustic signals while being mingled with interference signal；Via air or water, frequency
Acoustic signals and interference signal for w one group of cosine wave (or square wave) travel to acoustic receiver and received；
Step 4, acoustic signals of the acoustic receiver by the frequency received for w one group of cosine wave (or square wave) are converted to together
Cosine (or square wave) electric wave signal Rxcos (wt) of the one group of peak value of frequency between 0.1~1V, adjoint sound wave is disturbed and believed
Interference electric wave signal Sn (t) number is converted to, electric wave signal Rxcos (wt) and interference signal Sn (t) introducing of input are connected therewith
The Liu-cos chaos systems connect；
Step 5, electric wave signal Rxcos (wt) and the same frequency w in chaos system cosine function Racos (wt) is stacked
Plus, when the amplitude Ra+Rx after superposition is more than threshold limit value Rf, cause Liu-cos chaos system variables y and z output voltage
It is changed into the DC voltage close to 0V by chaotic waves；If acoustic receiver is not received and Liu-cos chaos system cosine
The acoustic signals of function Racos (wt) same frequencys w one group of cosine wave (or square wave), but receive only one group of sound wave interference letter
Number, sound wave interference signal is converted into electrical interference signal Sn (t), the Liu-cos chaos being attached thereto is then enter into
System, due to superimposed without the cosine function Racos (wt) in same frequency electric wave signal Rxcos (wt) and chaos system,
Racos (wt) amplitudes Ra keeps the constant output voltage waveforms still less than threshold limit value Rf, this variations per hour y and z to maintain chaos
Waveform is constant；
Step 6, Liu-cos chaos system variables y or z output voltage waveforms are detected by detector, if variable y or z
Output waveform be close to 0V DC voltages, to represent that acoustic receiver receives one group of cosine wave (or square wave) that frequency is w
Acoustic signals；If variable y and z output voltage waveforms are chaotic waves, represent that acoustic receiver is not received by a class frequency
For the acoustic signals of w cosine wave (or square wave).
Further, in step 1, the manufacture of described cosine wave (or square wave) pinger and acoustic receiver
Journey, is sent out by the way that the acoustic receiver of cosine wave (or square wave) pinger and cosine wave (or square wave) is constituted into one group of sound wave
Penetrate and reception system, believed by the sound wave with cosine function Racos (wt) same frequencys w cosine wave (or square wave) in chaos system
Number transmitting and receive come transmission information.
Further, in step 2, Liu-cos chaos system equations are：
In formula, Racos (wt) is the cosine function in Liu-cos chaos systems, and Rxcos (wt) is Liu-cos chaos system
The electric wave signal for the same waveform that the sound wave of the outside cosine wave (or square wave) of system input is obtained after conversion, Sn (t) is Liu-
The external interference signals of cos chaos systems input, select appropriate constant value a, b and c, are selected in the range of frequency 10Hz~40KHz
A frequency values w is selected, if variable x, y and z initial value are 0V；Select chaos system input external signal Rxcos (wt) and
Interference signal Sn (t) is 0V, and the amplitude Ra of cosine function makes Liu-cos chaos since gradually chaos system is increased 0V voltages
The voltage waveform of system variable y and z output by chaotic waves close to 0V DC voltage, if Ra at catastrophe point is threshold limit value
Rf, somewhat reduces Ra values, it is less than threshold limit value Rf；T increase over time, Liu-cos chaos system variables y's and z
Output voltage values show the waveform of chaos change in shape.
Compared with prior art, the inventive method has the following advantages that：
What the Liu-cos chaos systems of the design were only inputted by the acoustic signals of the cosine wave (or square wave) of assigned frequency
Influence, is not influenceed by the interference signal of other frequencies, has extremely strong inhibitory action to interference signal, and it detects different frequency sound
The resolution ratio of ripple signal can reach 1~2Hz, and the detection of the acoustic signals of cosine wave (or square wave) can be achieved.
Embodiment
The present invention will be further described below：
The method of the invention step is as follows：
Step 1, manufacture cosine wave (or square wave) pinger and acoustic receiver；
Step 2, manufacture Liu chaos systems and cosine function are combined obtained Liu-cos chaos systems；
Step 3, launched and Liu-cos chaos system cosine functions Racos to acoustic receiver using pinger
(wt) frequency is all w one group of cosine wave (or square wave) acoustic signals while being mingled with interference signal；Via air or water, frequency
Acoustic signals and interference signal for w one group of cosine wave (or square wave) travel to acoustic receiver and received；
Step 4, acoustic signals of the acoustic receiver by the frequency received for w one group of cosine wave (or square wave) are converted to together
Cosine (or square wave) electric wave signal Rxcos (wt) of the one group of peak value of frequency between 0.1~1V, adjoint sound wave is disturbed and believed
Interference electric wave signal Sn (t) number is converted to, electric wave signal Rxcos (wt) and interference signal Sn (t) introducing of input are connected therewith
The Liu-cos chaos systems connect；
Step 5, electric wave signal Rxcos (wt) and the same frequency w in chaos system cosine function Racos (wt) is stacked
Plus, when the amplitude Ra+Rx after superposition is more than threshold limit value Rf, cause Liu-cos chaos system variables y and z output voltage
It is changed into the DC voltage close to 0V by chaotic waves；If acoustic receiver is not received and Liu-cos chaos system cosine
The acoustic signals of function Racos (wt) same frequencys w one group of cosine wave (or square wave), but receive only one group of sound wave interference letter
Number, sound wave interference signal is converted into electrical interference signal Sn (t), the Liu-cos chaos being attached thereto is then enter into
System, due to superimposed without the cosine function Racos (wt) in same frequency electric wave signal Rxcos (wt) and chaos system,
Racos (wt) amplitudes Ra keeps the constant output voltage waveforms still less than threshold limit value Rf, this variations per hour y and z to maintain chaos
Waveform is constant；
Step 6, Liu-cos chaos system variables y or z output voltage waveforms are detected by detector, if variable y or z
Output waveform be close to 0V DC voltages, to represent that acoustic receiver receives one group of cosine wave (or square wave) that frequency is w
Acoustic signals；If variable y and z output voltage waveforms are chaotic waves, represent that acoustic receiver is not received by a class frequency
For the acoustic signals of w cosine wave (or square wave).
Embodiment one
Produce 1 cosine wave (or square wave) signal projector, 1 cosine wave (or square wave) signal receiver, 1 Liu-
Cos chaotic circuit systems；Sent with pinger to acoustic receiver or do not send cosine wave that a class frequency is w (or side
Ripple) acoustic signals；User receives acoustic signals by acoustic receiver, if receiver is received and cosine in chaos system
The identical frequency w of function Racos (wt) cosine wave (or square wave) acoustic signals, be converted into same frequency cosine wave (or side
Ripple) electric wave signal Rxcos (wt), Liu-cos chaos systems are inputted, if it is the remaining of w that acoustic receiver, which is not received by frequency,
The acoustic signals of string (or square wave), or interference acoustic signals simply are received, believe without frequency for w cosine wave (or square wave) electric wave
Number Rxcos (wt) input Liu-cos chaos systems；In identification process, user first adjusts the parameter of Liu-cos chaos systems
With constant make system variable y and z output voltage waveforms be chaotic waves, acoustic receiver by frequency for w cosine wave (or side
Ripple) acoustic signals be converted to cosine wave (or square wave) electric wave signal Rxcos (wt), input Liu-cos chaos systems.Liu-
Variable y and z output are changed into voltage waveform close to 0V direct currents from chaotic waves in cos chaos systems, represent acoustic receiver
Device receives the acoustic signals for the cosine wave (or square wave) that a class frequency is w.If variable y and z output waveform remain as mixed
Ignorant waveform, represents that acoustic receiver is not received by the acoustic signals for the cosine wave (or square wave) that frequency is w.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
In various modifications and improvement that case is made, the protection domain that claims of the present invention determination all should be fallen into.
Claims (3)
1. a kind of acoustic signals detection method based on Liu-cos chaos systems, it is characterised in that the detection method step is such as
Under：
Step 1, manufacture cosine wave (or square wave) pinger and acoustic receiver；
Step 2, manufacture Liu chaos systems and cosine function are combined obtained Liu-cos chaos systems；
Step 3, launched and Liu-cos chaos system cosine function Racos (wt) frequencies to acoustic receiver using pinger
Rate is all w one group of cosine wave (or square wave) acoustic signals while being mingled with interference signal；Via air or water, frequency is w's
The acoustic signals and interference signal of one group of cosine wave (or square wave) travel to acoustic receiver and received；
Step 4, acoustic signals of the acoustic receiver by the frequency received for w one group of cosine wave (or square wave) are converted to same frequency
Cosine (or square wave) electric wave signal Rxcos (wt) of one group of peak value between 0.1~1V, adjoint sound wave interference signal is turned
Interference electric wave signal Sn (t) is changed to, the electric wave signal Rxcos (wt) and interference signal Sn (t) of input are introduced what is be attached thereto
Liu-cos chaos systems；
Step 5, electric wave signal Rxcos (wt) and the same frequency w in chaos system cosine function Racos (wt) is superimposed, when
When amplitude Ra+Rx after superposition is more than threshold limit value Rf, cause Liu-cos chaos system variables y and z output voltage by chaos
Waveform is changed into the DC voltage close to 0V；If acoustic receiver is not received and Liu-cos chaos system cosine functions
The acoustic signals of Racos (wt) same frequencys w one group of cosine wave (or square wave), but one group of sound wave interference signal is received only,
Sound wave interference signal is converted into electrical interference signal Sn (t), the Liu-cos chaos system being attached thereto is then enter into
System, due to superimposed, the Racos without the cosine function Racos (wt) in same frequency electric wave signal Rxcos (wt) and chaos system
(wt) amplitude Ra keeps the constant output voltage waveforms still less than threshold limit value Rf, this variations per hour y and z to maintain chaotic waves not
Become；
Step 6, Liu-cos chaos system variables y or z output voltage waveforms are detected by detector, if variable y's or z is defeated
It is, close to 0V DC voltages, to represent that acoustic receiver receives the sound wave for one group of cosine wave (or square wave) that frequency is w to go out waveform
Signal；If variable y and z output voltage waveforms are chaotic waves, it is w's to represent that acoustic receiver is not received by a class frequency
The acoustic signals of cosine wave (or square wave).
2. a kind of acoustic signals detection method based on Liu-cos chaos systems according to claim 1, its feature exists
In：In step 1, described cosine wave (or square wave) pinger and the manufacturing process of acoustic receiver are by by cosine
The acoustic receiver of ripple (or square wave) pinger and cosine wave (or square wave) constitutes one group of acoustic emission and reception system, leads to
Cross the acoustic signals transmitting with cosine function Racos (wt) same frequencys w cosine wave (or square wave) in chaos system and receive
Transmission information.
3. a kind of acoustic signals detection method based on Liu-cos chaos systems according to claim 1, its feature exists
In in step 2, Liu-cos chaos system equations are：
In formula, Racos (wt) is the cosine function in Liu-cos chaos systems, and Rxcos (wt) is that Liu-cos chaos systems are defeated
The electric wave signal for the same waveform that the sound wave of the outside cosine wave (or square wave) entered is obtained after conversion, Sn (t) is mixed for Liu-cos
The external interference signals of ignorant system input, select appropriate constant value a, b and c, one are selected in the range of frequency 10Hz~40KHz
Frequency values w, if variable x, y and z initial value are 0V；Select the external signal Rxcos (wt) and interference letter of chaos system input
Number Sn (t) is 0V, and the amplitude Ra of cosine function becomes Liu-cos chaos systems since gradually chaos system is increased 0V voltages
Measure the voltage waveforms of y and z outputs by chaotic waves close to 0V DC voltage, if Ra at catastrophe point is threshold limit value Rf, slightly
Shade few Ra values, it is less than threshold limit value Rf；T increase over time, Liu-cos chaos system variables y and z output electricity
Pressure value shows the waveform of chaos change in shape.
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| CN109115329A (en) * | 2018-08-06 | 2019-01-01 | 燕山大学 | A kind of detection method and detection system of acoustic signals frequency |
| CN109188075A (en) * | 2018-08-06 | 2019-01-11 | 燕山大学 | A kind of electric wave signal frequency detecting method and system |
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