CN108282033A - A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave - Google Patents
A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave Download PDFInfo
- Publication number
- CN108282033A CN108282033A CN201810162602.5A CN201810162602A CN108282033A CN 108282033 A CN108282033 A CN 108282033A CN 201810162602 A CN201810162602 A CN 201810162602A CN 108282033 A CN108282033 A CN 108282033A
- Authority
- CN
- China
- Prior art keywords
- circuit
- energy
- voltage
- ultrasonic wave
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/15—Circuit arrangements or systems for wireless supply or distribution of electric power using ultrasonic waves
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
It is a kind of to realize that the system that load closed loop is powered in closed metal container belongs to wireless power transmission field using ultrasonic wave, the DC side of inverter circuit circuit output direct current in order to control in electric energy emission system in system, alternating current is converted to after inverter circuit, it is transmitted to and receives energy converter A, it is DC load after transformation of electrical energy processing of circuit, charge-discharge circuit power supply, is each circuit power supply in closed metal container；Voltage acquisition obtains DC load voltage and is compared with triangle wave circuit, obtain the square-wave signal with information of voltage, transmitting transducer B is driven after amplifying circuit, it receives the information that energy converter B is received and passes through detecting circuit, it obtains and DC voltage, and it is input to control circuit jointly with inverter circuit DC voltage, control circuit is for stablizing inverter circuit DC voltage.The present invention increases the voltage loopback channel between emitting side and receiving side, makes system that can not only carry out energy transmission, but also can be transmitted into row information, realizes the closed-loop stabilization power supply of system.
Description
Technical field
The invention belongs to wireless power transmission field, it is related to a kind of using ultrasonic wave being electrically to bear in closed metal container
It carries, the system that closed loop power supply is realized with the non-electrical way of contact.
Background technology
Ultrasonic wireless electric energy transmission technology is a kind of using ultrasonic wave, and the skill of energy is transmitted with the non-electrical way of contact
Art utilizes ultrasonic transducer, realize the technology of electro-acoustic-electricity conversion.Electromagnetic induction coupling more mature at this stage and electricity
Magnetic resonance wireless power transmission technology works as electromagnetic field in the barrier for encountering metal one kind using electromagnetic field as the medium transmitted
When hindering object, energy transmission can be weakened, or even be blocked.And ultrasonic wave is easy to as a kind of mechanical wave with strong directional, energy
It concentrates, it is particularly possible to the features such as penetrating metal medium, therefore needing to closed metal container (such as metallic conduit, flow container, gas storage
Tank etc.) internal electric loads the occasion that charges, and it can be as a kind of effective transfer mode using ultrasonic wave.
In ultrasonic wireless electric energy transmission system, it is now subjected to the transmission for being important to notice that energy, i.e., is sent out from energy
It penetrates in side to the transmission process of energy acceptance side, how to improve the efficiency of transmission and transimission power of energy.At the same time, for
The requirement of the power quality received is also higher and higher.Under normal conditions, voltage stabilizing link is added in receiving side, can reached certain
The voltage stabilizing of degree.But when occurring the case where there is switching electrical load in energy acceptance side, because receiving side voltage is by load parameter shadow
Sound is larger, and voltage will produce apparent variation at this time, and the voltage stabilized range of the voltage stabilizing link of energy acceptance side is small, and ability is limited,
Since energy acceptance side is mainly influenced by the running parameter of energy transmitting side, this just needs the state that will be loaded reflection to energy
Emitting side is adjusted the running parameter of emitting side, to stable energy receiving side voltage；Or there is reception lateral load short
When the emergency situations such as road, open circuit, common voltage stabilizing link cannot reach effect, need the feedback of status to emitting side, and
When stop emitting side power supply.It is therefore desirable to have the information channel of a feedback load voltage, forms " closed loop " power supply of system,
For realizing energy acceptance side stable power-supplying.
The present invention proposes one kind based on ultrasonic wave to electrical load closed loop method of supplying power in closed metal container, it is used
Two pairs of transducers realizes the transmission of system capacity and the transmission of information respectively.Energy transducer is electrical load on forward path
Transmission of the energy from system emitting side to receiving side is provided, information energy converter, which is introduced on feedback channel, realizes load voltage information
Transmission from system receiving side to emitting side.The mutual independence of ultrasonic wave and frequency phase-difference that two pairs of transducers generates are larger,
In metal medium transmittance process, it will not interfere with each other.Due to introducing the feedback channel of information, realize to energy acceptance side
Effective monitoring so that power quality improves many, to increase the reliability of ultrasonic wireless electric energy transmission system.This is
The continual and steady power supply of delicate electrical equipment (such as electric meter, sensor) in closed metal container, provides a kind of reality
Existing mode.
Invention content
In view of the problems of the existing technology, the present invention provides one kind in ultrasonic wireless electric energy transmission system, is close
The system and method that load stabilization is powered in container is closed, to solve in ultrasonic wireless electrical energy system between emitting side and receiving side
There is no the problem of load information feedback channel that it is negative to feed back to energy transmitting side that is, when receiving side carries out energy supply to load
The voltage condition of load, and energy transmitting side running parameter can be adjusted according to the voltage condition of load, to reach steady load electricity
The purpose of pressure.
For this purpose, the present invention uses following technical scheme：
A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave, the closed loop power supply system is with super
The form of sound wave carries out the electric energy transmission under metal medium and is transmitted with information, including electric energy emission system, electric energy receive system, letter
Cease emitting portion, information reception part and metallic transmission medium.
The electric energy emission system includes control circuit, inverter circuit, transmitting transducer A.The control circuit is used
It is adjusted in given deviation between DC voltage and the DC voltage of feedback, controller part can be by PI controllers or fuzzy
Control realizes that is, control circuit exports DC voltage and DC voltage is adjusted.The DC voltage warp of control circuit output
After inverter circuit, obtain the alternating current for meeting transmitting transducer A optimum Working frequencies, transmitting transducer A realize electric energy to
The conversion of acoustic energy, and emit ultrasonic acoustic waves into metallic transmission medium.Transmitting transducer A in the electric energy emission system is adopted
With the piezo-electric type power changing device of PZT-4 piezoelectric materials.Inverter circuit in the electric energy emission system may be used half-bridge,
Full-bridge flutters structure.
It includes receiving energy converter A, transformation of electrical energy circuit, charge-discharge circuit, DC load electricity that the electric energy, which receives system,
Road.The reception energy converter A is for receiving the ultrasonic wave being transmitted to from transmitting transducer A in metallic transmission medium, by acoustic energy
It is converted to electric energy and sends transformation of electrical energy circuit to；The transformation of electrical energy circuit is basic diode bridge current rectifying and wave filtering circuit,
The alternating current consistent with the transmitting electrical energy system frequency received is converted into direct current, and for DC load circuit and is filled
Discharge circuit is powered.The charge-discharge circuit provides stabilized power source for other circuit parts in closed metal container.Described
The energy converter A same type equipment consistent with transmitting transducer A parameters in electric energy emission system is received, that is, uses PZT-4 piezoresistive materials
The piezo-electric type power changing device of material.
The information department point include voltage collection circuit, triangle wave circuit, comparison circuit, amplifying circuit and
Transmitting transducer B.The DC voltage of DC load circuit both sides in the voltage collection circuit acquisition energy reception system, and will
It is transmitted to comparison circuit, and because load is affected to ultrasonic wireless electric energy transmission system, the voltage collection circuit is adopted
With voltage follower, the DC voltage for reliably acquiring load.The triangle wave circuit is used to provide comparison signal,
And comparison circuit is transmitted it to, triangular wave frequency is consistent with transmitting transducer B working frequencies.The comparison circuit pair
Collected load voltage is compared with triangular signal, is generated the PWM wave of fixed frequency, is transmitted to amplifying circuit, this is solid
Determine that frequency is consistent with the frequency optimum traffic of transmitting transducer B, because of the difference of load voltage, through comparison circuit output
The duty ratio of PWM wave is also different.The amplifying circuit is PWM wave amplifying circuit, and the amplitude for improving PWM wave drives transmitting to change
The work of energy device B, transmitting transducer B, to sound conversion of energy, the ultrasonic transmission after conversion to metal are situated between for realizing electric energy
In matter.The power piezoelectric energy converter of PZT-4 piezoelectric materials can also be used in the transmitting transducer B.The triangle wave circuit
Triangular wave frequency, comparison circuit output PWM wave frequency and transmitting transducer B frequency optimum traffic it is consistent.
The information reception part includes receiving energy converter B, detecting circuit.The work ginseng for receiving energy converter B
Number should be consistent with the parameter of transmitting transducer B in information translator unit, and reception is transmitted to from transmitting transducer B in metal medium
Ultrasonic wave realizes that acoustic energy is transmitted to detecting circuit to electric conversion of energy, and by electric energy.The detecting circuit is used for detecting by connecing
The voltage effective value that energy converter B is received is received, and the virtual value is changed into direct voltage output, can be specifically made of AD637
True root mean square-DC Module realize that the voltage value corresponds to canister internal load voltage, hold as by closed metal
Feedback voltage output inside device.
The metallic transmission medium is the heavy wall of closed metal container, the transmission path as ultrasonic wave.The gold
Belong to container material may be selected aluminium, stainless steel it is this kind of in practical situations in widely applied material, the thickness of metal thick wall is according to reality
Border engineering demand selection.
The transmitting, receive energy converter by mechanical device, apply couplant in metal surface or two ways combines
Method be fixed on the both sides of metal medium heavy wall.
The running parameter of the two pairs of transducers can be not quite identical, and one should be kept with the running parameter to energy converter
It causing, i.e. it is consistent that transmitting transducer A in electric energy emission system and electric energy receive the running parameter for receiving energy converter A in system,
Transmitting transducer B in information department point is consistent with the reception energy converter B running parameters in information reception part.But transmitting is changed
Energy device A is not necessarily consistent with the running parameter of transmitting transducer B, in real process, it is also desirable to and its running parameter differs greatly,
Ultrasonic wave interfering with each other in metal medium can be reduced in this way.The running parameter is most importantly the work of finger transducer
Working frequency emits, the frequency of the ultrasonic wave of reception in optimum Working.
Beneficial effects of the present invention are：The present invention by increasing the loopback channel of the voltage between emitting side and receiving side,
So that total system can not only carry out the transmission of energy, but also load voltage can be believed into the transmission of row information, receiving side
Breath feeds back to emitting side, so that emitting side is understood load voltage state, and adjust the emission part division of labor in time according to load voltage state
Make parameter, realizes and power to the load stabilization in closed metal container.
Description of the drawings
Fig. 1 is the system block diagram that load stabilization power supply in canister is realized using ultrasonic wave.
Specific implementation mode
With reference to the accompanying drawings of the specification and technical solution, it elaborates to specific embodiments of the present invention.
A method of realizing that load stabilization is powered in closed metal container using ultrasonic wave, the system block diagram such as Fig. 1 institutes
Show, including electric energy emission system, electric energy receive system, information emitting portion, information reception part, metallic transmission medium.Electric energy
Semi-bridge inversion or full bridge inverter, the concussion that drive signal can be made of TCL555 can be used in inverter circuit in emission system
Circuit is generated or is generated by DSP so that its working frequency need to meet transmitting transducer frequency optimum traffic, transmitting transducer A and
Receive energy converter A be the completely the same piezo-electric type power changing device using PZT-4 piezoelectric materials of two parameters, realize respectively from
The energy of electric energy to acoustic energy, acoustic energy to electric energy is converted.The transformation of electrical energy circuit that energy acceptance system includes is by basic diode bridge
Formula current rectifying and wave filtering circuit realizes that an output voltage part is used for charge-discharge circuit for the power supply to DC load, a part, uses
To provide stabilized power source for other circuit parts in closed metal container.Information emitting portion is by triangle wave circuit and load voltage
By comparison circuit, the PWM wave consistent with triangular wave frequency is generated, because of the difference of load voltage, the PWM exported through comparison circuit
The duty ratio of wave is also different, the frequency of triangular wave, the frequency optimum traffic of the frequency of the PWM wave of output and transmitting transducer B
Unanimously.Amplifying circuit is used for amplifying the PWM wave exported through comparison circuit, and the B work of driving transmitting transducer completes electric energy to acoustic energy
Conversion, ultrasonic wave propagates in metal medium, is received energy converter B and receives, and realizes conversion of the acoustic energy to electric energy.Transmitting is changed
Can device B with receive energy converter B be also the completely the same piezo-electric type power changing using PZT-4 piezoelectric materials of two parameters
The running parameter theory of device, two pairs of transducers can be not quite identical, is unanimously as long as meeting with the running parameter to energy converter
It can.But it in fact, the ultrasonic frequency of the generation of two pairs of transducers will have difference, avoids mutual under the same propagation medium
Interference.The RMS-DC converter that detecting circuit detection receives is direct voltage output, this circuit can be made of very equal AD637
Root-DC Module realizes that the voltage corresponds to corresponding load voltage in closed metal container.Control circuit is by given voltage
Deviation between feedback DC voltage is adjusted, and controller part can be realized by PI controllers or fuzzy control.Energy converter
It is fixed on the two of metal medium heavy wall by mechanical device, the method for applying couplant or two ways combination in metal surface
Side.The metallic transmission medium, which is the heavy wall of selection 50mm in this example, preferable laser propagation effect.
Claims (8)
1. a kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave, which is characterized in that described closes
Ring power supply system is carried out the transmission of the electric energy under metal medium in the form of ultrasonic wave and is transmitted with information, including electric energy emission system,
Electric energy receives system, information emitting portion, information reception part and metallic transmission medium；The transmitting receives energy converter
It is fixed on the two of metal medium heavy wall by mechanical device, the method for applying couplant or two ways combination in metal surface
Side；
The electric energy emission system includes control circuit, inverter circuit, transmitting transducer A；The control circuit output
DC voltage is simultaneously adjusted DC voltage, and DC voltage is transmitted to transmitting transducer A, transmitting transducer after inverter circuit
A realizes conversion of the electric energy to acoustic energy, and emits ultrasonic acoustic waves into metallic transmission medium；
It includes receiving energy converter A, transformation of electrical energy circuit, charge-discharge circuit, DC load circuit that the electric energy, which receives system,；Institute
The reception energy converter A stated is converted acoustic energy into for receiving the ultrasonic wave being transmitted to from transmitting transducer A in metallic transmission medium
Electric energy sends transformation of electrical energy circuit to；Alternating current is converted to direct current by the transformation of electrical energy circuit, and is DC load electricity
Road and charge-discharge circuit power supply；The charge-discharge circuit provides stabilized power source for other circuit parts in closed metal container；
The information department point includes voltage collection circuit, triangle wave circuit, comparison circuit, amplifying circuit and transmitting
Energy converter B；The DC voltage of DC load circuit both sides in the voltage collection circuit acquisition energy reception system, and passed
Transport to comparison circuit；The triangle wave circuit transmits it to comparison circuit for providing comparison signal；Described
The more collected load voltage of comparison circuit generates the PWM wave of fixed frequency with after triangular signal, is transmitted to amplification electricity
Road；The amplifying circuit drives transmitting transducer B, transmitting transducer B to convert electrical energy into acoustic energy, and the ultrasonic wave after conversion is passed
It is defeated in metal medium；
The information reception part includes receiving energy converter B, detecting circuit；The reception energy converter B receptions are changed from transmitting
Energy device B is transmitted to the ultrasonic wave in metal medium, realizes that acoustic energy is transmitted to detecting circuit to electric conversion of energy, and by electric energy；Institute
The detecting circuit stated is used for detecting the voltage effective value received by reception energy converter B, and the virtual value is changed into direct current
Pressure output；
The metallic transmission medium is closed metal container heavy wall, as the transmission path of ultrasonic wave, the thickness of metal thick wall
It is selected according to Practical Project demand；
The triangular wave frequency of the triangle wave circuit, the frequency of the PWM wave of comparison circuit output and transmitting transducer B are most
Good working frequency is consistent.
2. a kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave according to claim 1,
It is characterized in that, the transmitting transducer A and electric energy in the electric energy emission system receive the work for receiving energy converter A in system
Make that parameter is consistent, is all made of the piezo-electric type power changing device of PZT-4 piezoelectric materials.
3. it is according to claim 1 or 2 it is a kind of using ultrasonic wave realize closed metal container in load closed loop power supply be
System, which is characterized in that the reception energy converter B in transmitting transducer B and information reception part in the information department point
Running parameter is consistent.
4. it is according to claim 1 or 2 it is a kind of using ultrasonic wave realize closed metal container in load closed loop power supply be
System, which is characterized in that the inverter circuit in the electric energy emission system flutters structure using half-bridge, full-bridge.
5. a kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave according to claim 3,
It is characterized in that, the inverter circuit in the electric energy emission system flutters structure using half-bridge, full-bridge.
6. a kind of realized using ultrasonic wave according to claims 1 or 2 or 5 loads closed loop power supply in closed metal container
System, which is characterized in that the canister material selection aluminium, stainless steel in practical situations in widely applied material.
7. a kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave according to claim 3,
It is characterized in that, the canister material selection aluminium, stainless steel in practical situations in widely applied material.
8. a kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave according to claim 4,
It is characterized in that, the canister material selection aluminium, stainless steel in practical situations in widely applied material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162602.5A CN108282033A (en) | 2018-02-26 | 2018-02-26 | A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162602.5A CN108282033A (en) | 2018-02-26 | 2018-02-26 | A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108282033A true CN108282033A (en) | 2018-07-13 |
Family
ID=62808718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810162602.5A Withdrawn CN108282033A (en) | 2018-02-26 | 2018-02-26 | A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108282033A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067017A (en) * | 2018-08-21 | 2018-12-21 | 南京航空航天大学 | Ultrasonic wireless electric energy transmission system based on self adaptive control |
| CN112543065A (en) * | 2020-12-03 | 2021-03-23 | 中北大学 | Wireless power transmission and communication device and communication method for sealed metal container |
| CN115296513A (en) * | 2022-07-20 | 2022-11-04 | 陕西航空电气有限责任公司 | Ultrasonic non-electric contact electric energy transmission-based gate driving power supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100060178A (en) * | 2008-11-27 | 2010-06-07 | 주식회사 대우일렉트로닉스 | Non-contact charge remote controller and charge control method thereof |
| CN102437658A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Piezoelectric-ceramics-based ultrasonic wireless power transmission device |
| CN105406611A (en) * | 2015-10-28 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Device and method of determining through-metal wall ultrasonic sound wireless energy transmission channel optimization frequency |
| CN106374631A (en) * | 2015-07-21 | 2017-02-01 | 丰田自动车株式会社 | Contactless power transmission device and power transfer system |
| CN106981934A (en) * | 2017-05-02 | 2017-07-25 | 中国科学院声学研究所 | A kind of system and method that wireless power transfer is carried out for closed metal container |
-
2018
- 2018-02-26 CN CN201810162602.5A patent/CN108282033A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100060178A (en) * | 2008-11-27 | 2010-06-07 | 주식회사 대우일렉트로닉스 | Non-contact charge remote controller and charge control method thereof |
| CN102437658A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Piezoelectric-ceramics-based ultrasonic wireless power transmission device |
| CN106374631A (en) * | 2015-07-21 | 2017-02-01 | 丰田自动车株式会社 | Contactless power transmission device and power transfer system |
| CN105406611A (en) * | 2015-10-28 | 2016-03-16 | 中国人民解放军国防科学技术大学 | Device and method of determining through-metal wall ultrasonic sound wireless energy transmission channel optimization frequency |
| CN106981934A (en) * | 2017-05-02 | 2017-07-25 | 中国科学院声学研究所 | A kind of system and method that wireless power transfer is carried out for closed metal container |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067017A (en) * | 2018-08-21 | 2018-12-21 | 南京航空航天大学 | Ultrasonic wireless electric energy transmission system based on self adaptive control |
| CN112543065A (en) * | 2020-12-03 | 2021-03-23 | 中北大学 | Wireless power transmission and communication device and communication method for sealed metal container |
| CN112543065B (en) * | 2020-12-03 | 2023-03-03 | 中北大学 | Wireless power transmission and communication device and communication method for sealed metal container |
| CN115296513A (en) * | 2022-07-20 | 2022-11-04 | 陕西航空电气有限责任公司 | Ultrasonic non-electric contact electric energy transmission-based gate driving power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108282033A (en) | A kind of system for realizing load closed loop power supply in closed metal container using ultrasonic wave | |
| CN106981934B (en) | A kind of system and method carrying out wireless power transfer for closed metal container | |
| CN101610060B (en) | Self-excitation mixed-excitation brushless direct current power-generating system and control method thereof | |
| CN109067017A (en) | Ultrasonic wireless electric energy transmission system based on self adaptive control | |
| CN103560592B (en) | Ultrasonic wave liquid medium radio energy transmission system | |
| CN104267391A (en) | Sonar PMW transmitting circuit | |
| CN107947387B (en) | Energy supply system of underwater Internet of things node based on ultrasonic waves | |
| CN105717831A (en) | Impedance matching system and method and control system of supersonic power supply | |
| US6505518B1 (en) | Process for activating an oscillator and power supply circuit system for an oscillator | |
| CN203984214U (en) | Noise generating panel | |
| CN108565991A (en) | A kind of ultrasonic wave charging unit applied to underwater measurement devices | |
| CN103048006A (en) | Universal ultrasonic transmitting device and method | |
| CN108736762B (en) | Piezoelectric power generation device based on closed fluid for transferring vibration energy | |
| CN102405898B (en) | Subsonic wave generator | |
| CN201369677Y (en) | Improved radio-frequency power source for plasma discharge under atmospheric pressure | |
| CN109004764A (en) | One kind carrying out ultrasonic power supply system and method for closed metal container | |
| CN114660664A (en) | Power topology circuit of large-depth aviation electromagnetic detection transmitting system | |
| CN214416908U (en) | Plasma surface treatment device for robot glue spreader equipment | |
| CN214407623U (en) | Excitation circuit of electromagnetic flowmeter and electromagnetic flowmeter | |
| CN112420013B (en) | Active construction noise reduction device and method based on sound wave detection | |
| CN209217807U (en) | A kind of power supply unit penetrating liquid based on ultrasonic wave | |
| CN106344119A (en) | Direct excitation type ultrasonic power driving system | |
| CN116191694B (en) | Laser wireless energy information synchronous transmission system | |
| CN207664720U (en) | Receiving device, wireless power supply system and the wireless lighting systems of wireless power supply system | |
| CN105023569A (en) | Resonant frequency adjusting device of ultrasonic system and adjusting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180713 |