CN108289259A - The concealed earphone implementation method and device of the energy communication technology are taken based on ultrasonic wireless - Google Patents
The concealed earphone implementation method and device of the energy communication technology are taken based on ultrasonic wireless Download PDFInfo
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- CN108289259A CN108289259A CN201810263963.9A CN201810263963A CN108289259A CN 108289259 A CN108289259 A CN 108289259A CN 201810263963 A CN201810263963 A CN 201810263963A CN 108289259 A CN108289259 A CN 108289259A
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/385—Transceivers carried on the body, e.g. in helmets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
-
- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/385—Transceivers carried on the body, e.g. in helmets
- H04B2001/3872—Transceivers carried on the body, e.g. in helmets with extendable microphones or earphones
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention proposes to take the concealed earphone implementation method and device of the energy communication technology based on ultrasonic wireless.Device includes signal front end of emission, stealthy receiving terminal；Wherein signal front end of emission is mainly responsible for signal acquisition, spread spectrum coding processing and ultrasonic wave transmitting；And stealthy receiving terminal is mainly responsible for ultrasonic acquisition, electric energy storage, spreading spectrum and decoding processing and signals revivification output；Between two parts it is wirelessly connected by ultrasonic wave.The present invention utilizes the unique propagation characteristic of ultrasonic wave, progress wirelessly to take and can communicate, and when people does not wear and receives terminal, human ear can not directly hear ultrasonic signal, targetedly select accepting object to realize, while receiving terminal need not be energized additionally；It is compared to electromagnetic wave, ultrasonic wave has the advantages that stronger anti-interference ability, decays in solids small and influenced on human body and environment small, is very suitable for the human body carrying device as miniaturization.
Description
Technical field
The present invention relates to the technical fields such as radio energy-transmitting, acoustic communication, and in particular to being taken based on ultrasonic wireless can communicate
The concealed earphone implementation method and device of technology.
Background technology
In life, certain important meetings prevent from eavesdropping because trade secret or tender subject is related to, therefore
Under normal circumstances these meetings generally will not use raise one's voice equipment, limit the quantity of participant in this way, prevent because of ginseng
Can personnel are numerous and conference content of can not hear clearly.So needing a kind of device, people only need to be had a meeting in certain device coverage area
It is interior, it normally speaks against microphone, participant can be by the stealthy receiving end device of wearing (i.e.：Earphone) it is received, from
And hear sound, and other than particular range people or no signal carry receiver terminal device and per capita do not hear in speech
Hold.
Secondly, in tourist attractions, it is hoped that there will be the links of explanation by some people, and some people merely desire to pacify because understanding
Geostationary enjoy the scenery.So needing a kind of device at sight spot, in certain device coverage area, hope is allowed to have sight spot
The people understood takes stealthy receiving end device（I.e.：Earphone）, can hear the introduction at sight spot, and other than particular range or
The people for not carrying stealthy receiving end device is not hear that sight spot is introduced, therefore do not interfere with other tourists and natural environment.
Similar application scenarios are also very much, and the characteristics of not heard directly by human ear using ultrasonic wave, collocation is based on ultrasound
Wave wirelessly takes the R-T unit of the energy communication technology, can targetedly be selected receiving object.And it uses among these
Technology be it is based on ultrasound wirelessly take and can communicate, all the time, contactless energy transmission（Contactless
Energy Transfer, CET）All it is the technology that people study and apply one after another, such as inductive energy transmission occurs
（Inductive Power Transfer, IPT）, capacitive energy transmission（Coupled Power Transfer, CPT）、
Acoustic energy is transmitted（Acoustic Energy Transfer, AET）, far field electromagnetic energy transmission（Far-field EM）With
Optic energy transmission（Optical Energy Transmission）.
AET sound waves used at present and ultrasonic wave can solve the problems, such as traditional CET, such as：Directional transmissions, in metal
It is transmitted between medium, is transmitted in water etc., human body deep internal transmission etc., simultaneously as the speed of ultrasonic wave is relatively
Slowly, wavelength is short, is very suitable for minimizing, and is suitble to implanted medical application, and be free from side effects；The frequency phase of ultrasonic wave simultaneously
To relatively low, for the thyristor for high-speed switch, the service life is longer.
The first time away from AET comes out to have pass by nearly 30 years at present, there is vigorous growth：In the application of low-power consumption
On, Kawanabe and Mazzilli all realize carried out in biological tissue 20% energy transmission efficiency（Inside organism
Multipath is serious, energy dispersive it is serious thus energy transmission efficiency it is not high）With the data transmission of 9.5Kb/s（Using RF's
Transmission channel）；Lee realizes the energy transmission distance of 30mm, energy transmission efficiency 55% in aqueous medium.Powerful
Using upper, Arra realizes the energy transmission of 100W, energy transmission efficiency 88% between the metallic media of 38mm thickness.At home,
AET is studied and application is then started late relatively, various lives applications are in the development phase.
In view of this, the present invention proposes to take the concealed earphone apparatus and method of the energy communication technology based on ultrasonic wireless, adopt
It is taken and can be communicated with acoustic energy transmission AET technologies realization, sent to by spreading by the ultrasonic transducer of signal front end of emission
Ultrasonic wave is converted to electricity by the ultrasonic wave of coding after " concealed earphone " as stealthy receiving terminal receives ultrasonic signal
Can after " concealed earphone " is energized, while to ultrasonic wave carry out spread spectrum coding be output in ear.Because AET is various
It is very suitable for miniaturization in CET, therefore can't be very big in " concealed earphone " the space occupied, can be hidden in cochlea
Portion is hard of hearing, so it is known as " concealed earphone ".
Invention content
In daily life, reception signal terminal does not have to consider continuous as using the energy communication technology is wirelessly taken, that is, being not necessarily to battery
The problem of boat, transmitting master device can be reception signal terminal power supply and data transmission by ultrasonic wave, this will be people
Life provides convenience.Such as in tourism process, if having the broadcast introduction of respective background, this private at each sight spot
People " tour guide " only says to listen to the people for wanting to listen, and does not influence other people, this has the people for being unfamiliar with sight spot and preferably sees trip experience,
And save the spending that please conduct a sightseeing tour.It for example some highly important meetings or is not intended to be eavesdropped by other people again, it is unsuitable
Using loud speaker or broadcast, and this device can have and accurately select audience, and the confidentiality of that meeting will higher.
Based on same methods and techniques, using the characteristic of ultrasonic wave, adaptable aspect is also very much, such as using
The characteristic that ultrasonic wave can not be heard by human ear, sound can be targetedly transferred in the ear of nominator；In another example using super
Sound wave is decayed small feature in solid, and the reception terminal in the confined space for possessing thick metallic walls is energized and communicated,
Internal sensing data is read, this, which is tradition taking based on electromagnetic wave, can communicate and cannot achieve；Equally it is to utilize ultrasonic wave
Decay small feature in human body, can be energized and be communicated to receiving terminal in implanted body, carried for the health monitoring of the mankind
A kind of simple and feasible method is supplied.
Simultaneously as the generation of ultrasonic wave and the conversion of energy are realized by the ultrasonic transducer of piezoelectric ceramic type,
So there are one intrinsic resonant frequencies for ultrasonic transducer, and when this resonant frequency is transmitted, the efficiency meeting of energy transmission
Reach maximum.Therefore, portable communications system based on ultrasound is not due to ultrasonic transducer resonant frequency is high, transmission system
The carrier frequency of system is not also high, and bandwidth is also relatively narrow, and uses spread spectrum technic, such as：OFDM orthogonal frequency division multiplexis,
Bandwidth availability ratio can be improved, and multipath effect and intersymbol interference can be resisted.According to the aerial transmission characteristic of ultrasonic wave
It is found that the frequency when ultrasonic wave is lower, the distance of propagation is remoter, but bandwidth can shorten therewith；When the frequency of ultrasonic wave is higher, pass
The distance broadcast is closer, but bandwidth can broaden therewith.It therefore can be according to the difference of application scenario, the items such as distance of transmission range
Part adapts to concrete application environment using different ultrasonic transducers.
In conclusion the characteristics of according to ultrasonic wave, export after signal front end of emission carries out band spectrum modulation processing to signal
To ultrasonic transducer, the latter converts electrical energy into the acoustic energy with ultrasound modalities, travels to " concealed earphone " signal in air
Stealth receives terminal, and the ultrasonic transducer that stealth receives terminal converts acoustic energy into electric energy again, and stealthy reception signal terminal is to electricity
It can be captured and storaged, while spread spectrum demodulation module is given in energy supply, then realize the reduction of signal by spread spectrum demodulation module.
In view of this, it is convenient it is an object of the invention to be brought for people’s lives, transmit AET skills using acoustic energy
Art proposes that the concealed earphone apparatus and method that the energy communication technology is taken based on ultrasonic wireless, concrete principle are as follows：
It is of the present invention based on ultrasonic wireless take can the communication technology concealed earphone device by signal front end of emission 101, hidden
102 two parts of shape receiving terminal form.Wherein signal front end of emission 101 is acquired signal by A/D chip, and simulation is believed
Number become digital signal；After obtained digital signal carries out spread spectrum communication coding, analog signal is converted to by D/A, then by
After power amplification circuit is amplified, processed signal is converted to ultrasonic wave and launched by ultrasonic transducer.
In stealthy receiving terminal 102（That is concealed earphone end can be hidden in cochlea or ear because whole volume is smaller
Back of the body the inside, outside can't see, therefore be known as stealthy receiving terminal）In, ultrasonic transducer is responsible for carrying out energy to the ultrasonic wave received
The conversion of form, and power storage got off to receive the decode terminal system for ultrasonic signal energy is provided；Obtaining electric energy
After, it is to convert later electric signal to ultrasonic transducer to carry out A/D acquisitions first, converts analog signals into digital signal；
After the digital signal of gained carries out spreading spectrum and decoding, then analog signal is converted to by D/A and is exported.Since energy transmission is narrow
Band transmission, it is therefore desirable to which spread spectrum communication mode goes to realize and takes and can communicate, such as OFDM is exactly one of spread spectrum communication mode.
The signal front end of emission 101 that the concealed earphone device of the energy communication technology is wherein taken based on ultrasonic wireless is responsible for adopting
The signal collected is handled comprising power supply power supply unit 201, voice collecting unit 202, AD conversion unit 203, coding
Modulation unit 204, D/A conversion unit 205, power amplification unit 206, ultrasound emission unit 207.Wherein, power supply shown in supplies
Electric unit 201 is to provide general supply by cable power or battery, wherein having voltage stabilizing chip to obtain needed for corresponding module respectively
Voltage；The acoustical signal of simulation can be converted to the electric signal output of simulation by voice collecting unit 202；AD conversion unit 203
Timing control is carried out by coded modulation unit 204, it is number to be responsible for the analog-signal transitions for being acquired voice collecting unit 202
Signal；Coded modulation unit 204 is the unit that master control is carried out by processor, is mainly responsible for AD conversion unit 203 is defeated
The digital signal gone out carries out spread spectrum coding；D/A conversion unit 205 is to carry out timing control by coded modulation unit 204, is responsible for
Conversion of the digital signal to analog signal is carried out to the output after coded modulation unit 204；Power amplification unit 206 is responsible for pair
The output signal of D/A conversion unit 205 carries out power amplification so that signal meets the mission need of ultrasound emission unit 207；
Ultrasound emission unit 207 is responsible for carrying out impedance matching to signal to be transmitted, and the signal after matching is passed through ultrasonic transducer
Acoustical energy emission is converted to by electric energy to go out.
The reception terminal 102 of the concealed earphone device that the energy communication technology is taken based on ultrasonic wireless is responsible for signal
It is decoded demodulation reduction output, including ultrasonic reception unit 301, energy storage unit 302, AD conversion unit 303, decoding
Demodulating unit 304, D/A conversion unit 305, audio output unit 306.Wherein, ultrasonic reception unit 301 be mainly responsible for by by
The ultrasonic wave that ultrasound emission unit 207 launches carries out conversion of the acoustic energy to electric energy, and carries out impedance matching wherein；Electric energy
Storage unit 302 be by by ultrasonic reception unit 301 it is converted Lai electric energy store, and receive terminal as entire
102 energy supply source；The electric signal that AD conversion unit 303 exports after being converted to ultrasonic reception unit 301 is acquired simultaneously
Digital signal is converted to, output to decoding demodulating unit 304 is then given to handle；Decoding demodulating unit 304 is mainly responsible for modulus
The output of converting unit 303 carries out spread spectrum demodulation；D/A conversion unit 305 is responsible for that the output result of demodulating unit 304 will be decoded
Become analog signal；Audio output unit 306 is responsible for the output signal of D/A conversion unit 305 is converted to the mankind to hear
Sound.
Although ultrasonic wave has exceeded the receivable frequency range of human ear, reflection of the ultrasonic wave in medium, refraction,
The propagation laws such as diffraction, scattering, with the difference of the rule of audible sound not substantially.In addition the wavelength of ultrasonic wave is very short, only
There are several centimetres or even some thousandths of millimeter, therefore the ultrasonic transducer size of stealthy receiving terminal is small, can realize that miniaturization is answered
With.Simultaneously according to the demand of the occasion of application, the working frequency of whole device can be reconciled, the transmission range of different scenes is adapted to
Requirement.
Another object of the present invention is the concealed earphone device for being to propose to take the energy communication technology based on ultrasonic wireless
Implementation method, be as follows：
Step 1：To sound signal collecting, the step of carrying out sound signal collecting, includes：
1.1 when having any sound be passed to, acquire in the input terminal of voice signal there are one voice collecting unit 202
Voice signal can be all converted to the electric signal output of simulation by unit.
After 1.2 have obtained the analog signal of sound, the AD conversion unit 203 controlled by coded modulation unit 204 is right
It is sampled, and the data after sampling exist in the memory of coded modulation unit 204.
Step 2：Spread spectrum communication modulation is carried out to the signal of acquisition, the step of spread spectrum communication is modulated includes：
2.1 read the gathered data in memory by the main control processor in coded modulation unit 204；
2.2 carry out band spectrum modulation processing by the main control processor in coded modulation unit 204 to data；2.3 pairs obtain
As a result by the conversion of D/A conversion unit 205, become analog signal.
Step 3：Power amplification output is carried out to signal, specific power method includes the following steps：
3.1 power amplification units 206 carry out different brackets power to the signal after coded modulation according to actual application scenarios and put
Greatly.
3.2 power amplification unit, 206 amplified signal will be input into the ultrasound emission list for crossing impedance matching
In member 207, ultrasound emission unit 207 will be converted to ultrasonic signal to the electric signal and emit.
Step 4：Ultrasonic signal is received, specific receive process include the following steps：
The ultrasonic reception unit 301 of 4.1 ultrasound emission units 207 and signal front end of emission is a reciprocal process, and ultrasound connects
It is that acoustical signal is converted to electric signal to receive unit 301.
Further：（One）Because the directionality of ultrasonic wave is very strong, the ultrasonic reception unit 301 of stealthy receiving terminal needs
It to be aligned with the ultrasound emission unit 207 of signal front end of emission, maximum reception energy can be obtained.（Two）Because
The frequency of ultrasonic wave is lower, and the distance of propagation is also opposite remote, but bandwidth is also lower, it is possible to be replaced according to actual scene
The ultrasonic transducer of suitable frequency.
Step 5：Energy is stored, specific process includes the following steps：
5.1 because the output of ultrasonic reception unit 301 of stealthy receiving terminal is not a stable DC, needs pair
The output carries out rectifying and wave-filtering, and is stored to electricity by energy storage unit 302.
5.2 at the same time, and the voltage amplification chip in energy storage unit 302 puts the voltage after rectifying and wave-filtering
Greatly, the voltage range that the processor of demodulation uses can be supplied by being increased to.
Step 6：Spread spectrum demodulation is carried out to signal, specific demodulating process includes the following steps：
6.1 when the electric energy of energy storage unit 302 has been supplied to decoding demodulating unit 304, just controls AD conversion unit 303
Electric signal obtained by ultrasonic transducer is sampled；
6.2 decoding demodulating units 304 store 303 collected signal of AD conversion unit in memory；
6.3 decoding demodulating units 304 demodulate the data read out for spread spectrum communication from memory.
Step 7：It is exported after digital-to-analogue conversion, detailed process includes the following steps：
7.1 D/A conversion unit 305 by being controlled by decoding demodulating unit 304 carries out digital-to-analogue conversion to demodulation result；
7.2 D/A conversion unit, 305 transformed signal will be used in audio output unit 306, obtain from signal front end of emission
The original signal sent out.
The concealed earphone apparatus and method of the present invention that the energy communication technology is taken based on ultrasonic wireless are had following excellent
Point：
1）The present invention using ultrasonic wave as communication carrier, compared to electromagnetic wave, ultrasonic wave have it is anti-interference, can be in special medium
The characteristics of middle transmission, and device may be implemented to minimize, and any burden will not be brought by being worn on the person.
2）The present invention realizes communication so that be not required in stealthy receiving terminal by the way of taking and can communicate while energy supply
Additionally to increase battery, greatly reduce device volume and increase workability.
3）The present invention effectively utilizes limited bandwidth to realize the transmission of information, phase using spread spectrum communication mode
Than in simple communication mode, anti-multipath effect may be implemented and possess relatively high speed information rate.
To sum up, the present invention has many advantages, such as harmless to humans, small, targeted, easy to use, has a wide range of applications
Foreground, while the present invention is suitably transformed, the occasion that can be failed in electromagnetic wave, such as：Metallic media, underwater, implanted
Medical treatment etc. substitutes electromagnetic communication.
Description of the drawings
Fig. 1 is the concealed earphone structure drawing of device of the present invention that the energy communication technology is taken based on ultrasonic wireless；
Fig. 2 is the structure chart of signal front end of emission signal processing of the present invention；
Fig. 3 is the structure chart of stealthy receiving end signal processing of the present invention；
Fig. 4 A are the flow chart of signal front end of emission signal processing of the present invention；
Fig. 4 B are the flow chart of stealthy receiving end signal processing of the present invention.
Specific implementation mode
The technologies such as acoustics, informatics and power electronics are organically combined together by the present invention, according to the energy of ultrasonic wave
Transmission characteristic and advantage realize that substituting the wireless of electromagnetic wave takes and can communicate.The present invention is made with reference to embodiment and attached drawing
Further detailed description illustrates that embodiments of the present invention are not limited thereto.It is noted that if following have not especially in detail
Illustrate place, is that those skilled in the art can refer to prior art understanding or implement.
Described in this example based on ultrasonic wireless take can the communication technology concealed earphone device structure chart as shown in Figure 1,
It is made of 102 two signal front end of emission 101, stealthy receiving terminal parts, is to carry out nothing by ultrasonic wave between two parts
Line is associated with.Wherein signal front end of emission 101 is responsible for the transmitting of the acquisition of signal, spread spectrum communication modulation and ultrasonic wave.Stealth receives
It holds the reception of 102 responsible ultrasonic waves, the storage of electric energy, expand communication demodulation output.
The structure of signal front end of emission 101 described in this example is as shown in Figure 2.Wherein power supply power supply unit 201 is mainly responsible for
Meet all kinds of voltage requirements of 101 whole system of signal front end of emission.Voice collecting unit 202 is responsible in real time by the sound of simulation
Signal is converted to the electric signal output of simulation.AD conversion unit 203 is connected with voice collecting unit 202, is responsible for voice
The analog-signal transitions that collecting unit 202 is acquired are digital signal.Coded modulation unit 204 respectively with AD conversion unit
203, D/A conversion unit 205 is connected, and is responsible for the timing control of institute's connection unit and to collected data spread logical
Believe coded treatment.D/A conversion unit 205 is connected with coded modulation unit 204, and responsible to treated, digital signal becomes
Analog signal.Power amplification unit 206 is connected with D/A conversion unit 205, is responsible for the output letter of logarithmic mode converting unit 205
Number carry out power amplification so that signal meets the mission need of ultrasound emission unit 207；Ultrasound emission unit 207 is put with power
Big unit 206 is connected, be responsible for signal to be transmitted carry out impedance matching, and by the signal after matching by ultrasonic transducer by
Electric energy is converted to acoustical energy emission and goes out.
Stealthy receiving terminal 102 described in this example, as shown in Figure 3.Wherein, ultrasonic reception unit 301 is responsible for be sent out by ultrasound
It penetrates the ultrasonic wave that unit 207 launches and carries out conversion of the acoustic energy to electric energy, and carry out impedance matching wherein；Power storage
Unit 302 is connected with ultrasonic reception unit 301, be responsible for it is converted to ultrasonic reception unit 301 come electric energy carry out storage and
Voltage stabilizing exports, and energy supply is provided for the entire terminal 102 that receives；AD conversion unit 303 is connected with ultrasonic reception unit 301
It connects, the electric signal for being responsible for exporting after converting ultrasonic reception unit 301 is acquired and is converted to digital signal；Decoding demodulation is single
Member 304 is connected with AD conversion unit 303, D/A conversion unit 305, is mainly responsible for the output to AD conversion unit 303
Carry out spread spectrum demodulation；D/A conversion unit 305 is responsible for the output result for decoding demodulating unit 304 becoming analog signal；Audio
Output unit 306 is connected with D/A conversion unit 305, is responsible for the output signal of D/A conversion unit 305 being converted to the mankind
The sound that can be heard.
The concrete operation step of the present embodiment is as follows（As shown in Figure 4 A and 4 B shown in FIG.）：
Step 1：To sound signal collecting, the step of carrying out sound signal collecting, includes：
1.1 when having any sound be passed to, acquire in the input terminal of voice signal there are one voice collecting unit 202
Voice signal can be all converted to the electric signal output of simulation by unit.
After 1.2 have obtained the analog signal of sound, the AD conversion unit 203 controlled by coded modulation unit 204 is right
It is sampled, and the data after sampling exist in the memory of coded modulation unit 204.
Step 2：Spread spectrum communication modulation is carried out to the signal of acquisition, the step of spread spectrum communication is modulated includes：
2.1 read the gathered data in memory by the main control processor in coded modulation unit 204；
2.2 carry out band spectrum modulation processing by the main control processor in coded modulation unit 204 to data；2.3 pairs obtain
As a result by the conversion of D/A conversion unit 205, become analog signal.
Step 3：Power amplification output is carried out to signal, specific power method includes the following steps：
3.1 power amplification units 206 carry out different brackets power to the signal after coded modulation according to actual application scenarios and put
Greatly.
3.2 power amplification unit, 206 amplified signal will be input into the ultrasound emission list for crossing impedance matching
In member 207, ultrasound emission unit 207 will be converted to ultrasonic signal to the electric signal and emit.
Step 4：Ultrasonic signal is received, specific receive process include the following steps：
The ultrasonic reception unit 301 of 4.1 ultrasound emission units 207 and signal front end of emission is a reciprocal process, and ultrasound connects
It is that acoustical signal is converted to electric signal to receive unit 301.
4.2 it is worth noting that：（One）Because the directionality of ultrasonic wave is very strong, the ultrasonic reception of stealthy receiving terminal
The needs of unit 301 are aligned with the ultrasound emission unit 207 of signal front end of emission, can obtain maximum reception energy
Amount.（Two）Because the frequency of ultrasonic wave is lower, the distance of propagation is also opposite remote, but bandwidth is also lower, it is possible to according to reality
The scene on border replaces the ultrasonic transducer of suitable frequency.
Step 5：Energy is stored, specific process includes the following steps：
5.1 because the output of ultrasonic reception unit 301 of stealthy receiving terminal is not a stable DC, needs pair
The output carries out rectifying and wave-filtering, and is stored to electricity by energy storage unit 302.
5.2 at the same time, and the voltage amplification chip in energy storage unit 302 puts the voltage after rectifying and wave-filtering
Greatly, the voltage range that the processor of demodulation uses can be supplied by being increased to.
Step 6：Spread spectrum demodulation is carried out to signal, specific demodulating process includes the following steps：
6.1 when the electric energy of energy storage unit 302 has been supplied to decoding demodulating unit 304, just controls AD conversion unit 303
Electric signal obtained by ultrasonic transducer is sampled；
6.2 decoding demodulating units 304 store 303 collected signal of AD conversion unit in memory；
6.3 decoding demodulating units 304 demodulate the data read out for spread spectrum communication from memory.
Step 7：It is exported after digital-to-analogue conversion, detailed process includes the following steps：
7.1 D/A conversion unit 305 by being controlled by decoding demodulating unit 304 carries out digital-to-analogue conversion to demodulation result；
7.2 D/A conversion unit, 305 transformed signal will be used in audio output unit 306, obtain from signal front end of emission
The original signal sent out.
The concealed earphone apparatus and method that the energy communication technology is taken based on ultrasonic wireless described in this example are had following excellent
Point：
1）This example using ultrasonic wave as communication carrier, compared to electromagnetic wave, ultrasonic wave have it is anti-interference, can be in special medium
The characteristics of middle transmission, and device may be implemented to minimize, and any burden will not be brought by being worn on the person.
2）This example realizes communication so that be not required in stealthy receiving terminal by the way of taking and can communicate while energy supply
Additionally to increase battery, greatly reduce device volume and increase ease of use.
3）This example effectively utilizes limited bandwidth to realize the transmission of information, phase using spread spectrum communication mode
Than in simple communication mode, anti-multipath effect may be implemented and possess relatively high speed information rate.
To sum up, this example has many advantages, such as harmless to humans, small, targeted, easy to use, has a wide range of applications
Foreground, while this example is suitably transformed, the occasion that can be failed in electromagnetic wave, such as：Metallic media, underwater, implanted
Medical treatment etc. substitutes electromagnetic communication.
Claims (4)
1. based on ultrasonic wireless take can the communication technology concealed earphone device, it is characterised in that including signal front end of emission, hidden
Shape receiving terminal；Wherein signal front end of emission is mainly responsible for signal acquisition, spread spectrum coding processing and ultrasonic wave transmitting；And stealthy reception
End is mainly responsible for ultrasonic acquisition, electric energy storage, spreading spectrum and decoding processing and signals revivification output；It is by super between two parts
Sound wave is wirelessly connected, and when the ultrasonic transducer of signal front end of emission and stealthy receiving terminal is mutually aligned, could be realized most
High-transmission efficiency；Stealthy receiving terminal does not need battery-powered.
2. the concealed earphone device according to claim 1 for taking the energy communication technology based on ultrasonic wireless, it is characterised in that
The signal front end of emission includes power supply power supply unit, voice collecting unit, AD conversion unit, coded modulation unit, number
Mould converting unit, power amplification unit and ultrasound emission unit；
The power supply power supply unit provides general supply inside signal front end of emission, using cable power or battery, wherein dividing
There is not voltage stabilizing chip to obtain required voltage；The voice collecting unit is outside signal front end of emission, the sound for that will simulate
Signal is converted to the electric signal output of simulation；
The AD conversion unit is connected in external voice collecting unit, is responsible for language inside signal front end of emission
The analog-signal transitions that sound collecting unit is acquired are digital signal；
The coded modulation unit is a unit for carrying out master control by processor, is mainly responsible for inside signal front end of emission
The digital signal of AD conversion unit output is subjected to spread spectrum coding；
The D/A conversion unit is responsible for carrying out digital signal to the output after coded modulation unit inside signal front end of emission
To the conversion of analog signal；
The power amplification unit inside signal front end of emission, put by the output signal progress power for being responsible for logarithmic mode converting unit
Greatly so that signal meets the mission need of ultrasound emission unit；The ultrasound emission unit outside signal front end of emission, as
The transmitting output par, c of ultrasonic wave is responsible for electric signal becoming ultrasonic signal emission, and installation site needs and stealthy receiving terminal
Ultrasonic reception unit is coordinated, to obtain maximum transmitted efficiency.
3. the concealed earphone device according to claim 1 for taking the energy communication technology based on ultrasonic wireless, it is characterised in that
The stealthy receiving terminal includes ultrasonic reception unit, energy storage unit, AD conversion unit, decoding demodulating unit, digital-to-analogue
Converting unit and audio output unit：
Ultrasonic transducer in the ultrasonic reception unit is responsible for receiving from signal front end of emission outside stealthy receiving terminal
Ultrasonic signal, and it is converted into electric signal；
The energy storage unit is connected with ultrasonic reception unit, and the electric energy to be come by ultrasonic reception cell translation is deposited
Storage, and as the entire energy supply source for receiving terminal；
The AD conversion unit when electric energy reaches setting range, just to the electric signal that is exported after ultrasonic reception cell translation into
Row acquires and is converted to digital signal, then gives output to decoding demodulating unit processing；
The decoding demodulating unit is the unit that master control is carried out by processor, is responsible for timing control, to AD conversion unit
Output carry out spread spectrum demodulation；
The D/A conversion unit is responsible for the output result for decoding demodulating unit becoming analog signal；
The audio output unit is responsible for the output signal of D/A conversion unit being converted to the sound that the mankind can hear.
4. realizing that claim 1 ~ 3 any one of them takes the side of the concealed earphone device of the energy communication technology based on ultrasonic wireless
Method, it is characterised in that include the following steps：
Step 1：To sound signal collecting, the step of carrying out sound signal collecting, includes：
1.1 voice signal input terminal, there are one voice collecting unit, when thering is any sound to be passed to, voice collecting
Voice signal can be all converted to the electric signal output of simulation by unit；
After 1.2 have obtained the analog signal of sound, the AD conversion unit controlled by coded modulation unit adopts it
Sample, the data after sampling exist in the memory of coded modulation unit；
Step 2：Spread spectrum communication modulation is carried out to the signal of acquisition, the step of spread spectrum communication is modulated includes：
2.1 read the gathered data in memory by the main control processor in coded modulation unit；
2.2 carry out band spectrum modulation processing by the main control processor in coded modulation unit to data；
2.3 pairs of obtained results become analog signal by the conversion of D/A conversion unit；
Step 3：Power amplification output is carried out to signal, specific power method includes the following steps：
3.1 power amplification units carry out different brackets power amplification according to actual application scenarios to the signal after coded modulation；
The amplified signal of 3.2 power amplification units by be input into have been subjected to impedance matching ultrasound emission unit in, ultrasound
Transmitter unit will be converted to ultrasonic signal to the electric signal and emit；
Step 4：Ultrasonic signal is received, specific receive process include the following steps：
The ultrasonic reception unit of 4.1 ultrasound emission units and signal front end of emission is a reciprocal process, ultrasonic reception unit
It is that acoustical signal is converted into electric signal；
Step 5：Energy is stored, specific process includes the following steps：
The ultrasonic reception unit output of 5.1 stealthy receiving terminals is not a stable DC, thus need to the output into
Row rectifying and wave-filtering, and electricity is stored by energy storage unit；
5.2 at the same time, and the voltage amplification chip in energy storage unit is amplified the voltage after rectifying and wave-filtering, improves
The voltage range used to the processor that can supply demodulation；
Step 6：Spread spectrum demodulation is carried out to signal, specific demodulating process includes the following steps：
6.1 when the electric energy of energy storage unit has been supplied to decoding demodulating unit, just controls AD conversion unit and changes ultrasound
Electric signal obtained by energy device is sampled；
6.2 decoding demodulating units store the collected signal of AD conversion unit in memory；
6.3 decoding demodulating units demodulate the data read out for spread spectrum communication from memory；
Step 7：It is exported after digital-to-analogue conversion, detailed process includes the following steps：
7.1 D/A conversion unit by being controlled by decoding demodulating unit carries out digital-to-analogue conversion to demodulation result；
The transformed signal of 7.2 D/A conversion units will be used in audio output unit, obtain sending out from signal front end of emission
Original signal.
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