CN109067017A - Ultrasonic wireless electric energy transmission system based on self adaptive control - Google Patents
Ultrasonic wireless electric energy transmission system based on self adaptive control Download PDFInfo
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- CN109067017A CN109067017A CN201810954548.8A CN201810954548A CN109067017A CN 109067017 A CN109067017 A CN 109067017A CN 201810954548 A CN201810954548 A CN 201810954548A CN 109067017 A CN109067017 A CN 109067017A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 43
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- 230000002463 transducing effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000011664 signaling Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005457 optimization Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000013028 medium composition Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- 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
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- H02J7/025—
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- Engineering & Computer Science (AREA)
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Abstract
The present invention discloses a kind of ultrasonic wireless electric energy transmission system based on self adaptive control, including energy transmission part and self adaptive control part, direct current is converted into high-frequency alternating current to drive transmitting transducer by ultrasonic-frequency power supply, transmitting transducer converts alternating current to ultrasonic wave and is sent in medium, is transferred to reception energy converter by medium；It receives energy converter and the ultrasonic wave received is converted into high-frequency alternating current, by supplying electricity to load after receiving circuit；Energy management module realizes the control for receiving circuit, and the state of load is passed to signal feedback network；Signal feedback network is transmitted in dynamic impedance matching again, and dynamic impedance matching realizes the closed-loop control of ultrasonic-frequency power supply, and according to the working condition of the load status signal adjustment ultrasonic-frequency power supply received.Such system can realize the wireless charging of metal enclosed occasion, realize the closed-loop control of system, improve stability and reliability.
Description
Technical field
It is the invention belongs to wireless power transmission and power conversion technology field, in particular to a kind of based on self adaptive control
Ultrasonic wireless electric energy transmission system.
Background technique
As electrical equipment becomes increasingly popular, there is contact unreliable, peace for the traditional electricity supply mode based on contact conduction
The problems such as full property is poor, movement flexibility is poor, and wireless power transmission technology is realized by the carrier of other forms without directly electrical
The electric energy of contact transmits, and has the characteristics that mobile flexibility is high, environmental suitability is strong, receive more and more attention.
There are mainly four types of implementations for wireless power transmission technology: electromagnetic type, ultrasonic type, laser type and microwave type.Electricity
Magnetic-type and ultrasonic type are closed suitable for short-distance wireless electric energy transmission field, and laser type and microwave type are suitable for remote-wireless electric energy
Transmit occasion.Electromagnetic type transimission power is big, high-efficient, but for there are the occasions of metal medium, serious by electromagnetic interference, very
To the transmission that can not achieve energy.Ultrasonic wave is the mechanical wave that frequency is greater than 20kHz, can be in any Propagation, no electromagnetism
Interference, and directionality is good, is especially suitable for metal enclosed occasion, such as pacemaker, cochlear implant, internal Miniature medical robot
Equal human bodies are implanted into the military industry equipments such as equipment and nuclear submarine, nuclear reactor, pressure vessel.Therefore ultrasonic wireless electric energy is passed
Defeated systematic research is significant.But it is shallower to the depth of investigation of ultrasonic wireless electric energy transmission system at present, it is existing
Research is opened loop control, and when the external environments such as temperature change, system job insecurity, efficiency is decreased obviously.In addition,
Open cycle system cannot reflect load charged state in real time, and the system that will cause and load damage, system reliability such as overcharging reduces.Together
When, the ultrasonic wireless electric energy transmission system power grade studied at present is lower, to limit the electric energy transmission system at certain
The application in a little fields.
Summary of the invention
The purpose of the present invention is to provide a kind of ultrasonic wireless electric energy transmission system based on self adaptive control, can
The wireless charging for realizing metal enclosed occasion realizes the closed-loop control of system, improves stability and reliability.
In order to achieve the above objectives, solution of the invention is:
A kind of ultrasonic wireless electric energy transmission system based on self adaptive control, including energy transmission part and self-adaptive controlled
Part processed, wherein energy transmissive portion point is including ultrasonic-frequency power supply, transmitting transducer, reception energy converter and receives circuit, self-adaptive controlled
System part includes energy management module, signal feedback network and dynamic impedance matching；
In energy transmission part, direct current is converted into high-frequency alternating current to drive transmitting transducer by ultrasonic-frequency power supply, is emitted
Energy converter converts alternating current to ultrasonic wave using inverse piezoelectric effect and is sent in medium, is transferred to reception transducing by medium
Device；It receives energy converter and the ultrasonic wave received is converted into high-frequency alternating current using direct piezoelectric effect, by turning after receiving circuit
The powered by direct current of relevant voltage grade is changed into load；
In self adaptive control part, energy management module realizes the control for receiving circuit, and the state of load is converted into
Corresponding digital signal passes to signal feedback network；The load status signal received is transmitted to dynamic by signal feedback network
In impedance matching, dynamic impedance matching realizes the closed-loop control of ultrasonic-frequency power supply, and is adjusted according to the load status signal received
The working condition of ultrasonic-frequency power supply.
After adopting the above scheme, the present invention realizes wireless transmission of the energy in metal medium by ultrasonic wave, solves
Metal enclosed occasion cannot achieve the problem of electric energy effectively transmits.By self adaptive control Real-time Feedback load condition, realize
The closed-loop control of system improves the stability and reliability of system.The dynamic of ultrasonic-frequency power supply is realized using technology of frequency tracking
It is affected by environment big to solve the problems, such as that ultrasonic wireless electric energy transmits for impedance matching, realize ultrasonic-frequency power supply closed-loop control and
System effectiveness optimization.Using high-power energy converter and circuit topology, system power grade is improved.
Ultrasonic wireless electric energy provided by the present invention transmission be implanted into equipment compared with human bodies such as pacemaker, cochlear implants and
Speech, system power higher grade, can be applied to the military industry equipments such as guided missile, nuclear submarine, nuclear reactor, pressure vessel, realizes nothing
Line charge electricity, high-frequency inverter therein, Dynamic Matching scheme, signal feedback loop, energy management module, receive circuit etc. can also
Applied to other wireless power transmissions and power conversion technology field.
Detailed description of the invention
Fig. 1 is ultrasonic wireless electric energy transmission system energy transmission partial circuit topology；
Fig. 2 is full-bridge driving and output voltage waveforms；
Fig. 3 is voltage sample and zero cross detection circuit；
Fig. 4 is current sample and zero cross detection circuit；
Fig. 5 is frequency tracing control schematic diagram；
Wherein, (a) is the phase angle characteristics of energy converter, is (b) program flow diagram；
Fig. 6 is signal feedback loop working principle diagram；
Fig. 7 is ultrasonic wireless electric energy transmission system energy transmission working waveform figure；
Fig. 8 is current-voltage waveform figure when frequency-tracking not being added under different frequency；
Wherein, f in (a)s=40225Hz, (b) in fs=40300Hz；
Fig. 9 is the current-voltage waveform figure being added after frequency tracing control；
Wherein, fs=40250Hz；
Figure 10 is system effectiveness curve graph under different operating frequency；
Figure 11 is integrated stand composition of the invention.
Specific embodiment
The present invention provides a kind of ultrasonic wireless electric energy transmission system based on self adaptive control, including energy transmission part
With self adaptive control part, wherein energy transmissive portion point is including ultrasonic-frequency power supply, transmitting transducer, reception energy converter and receives electricity
Wireless transmission of the energy from transmitting terminal to receiving end is realized on road；Self adaptive control part includes energy management module, signal feedback
Access and dynamic impedance matching realize closed-loop control and the efficiency optimization of system.
In energy transmission part, direct current is converted into high-frequency alternating current to drive transmitting transducer by ultrasonic-frequency power supply, is emitted
Energy converter converts alternating current to ultrasonic wave using inverse piezoelectric effect and is sent in medium, is transferred to reception transducing by medium
Device.It receives energy converter and the ultrasonic wave received is converted into high-frequency alternating current using direct piezoelectric effect, by turning after receiving circuit
The powered by direct current of relevant voltage grade is changed into load.Wherein, the medium includes empty gas and water and metal.
In self adaptive control part, energy management module realizes the control for receiving circuit, and the state of load is converted into
Corresponding digital signal passes to signal feedback network.The load status signal received is transmitted to dynamic by signal feedback network
In impedance matching.Dynamic impedance matching realizes the closed-loop control of ultrasonic-frequency power supply, and is adjusted according to the load status signal received
The working condition of ultrasonic-frequency power supply.
Load charge-discharge or electric power thus supplied are fed back the real-time control system work into ultrasonic-frequency power supply by the energy management module
Make state, realize the closed-loop control of ultrasonic wireless electric energy transmission system, improves system stability.
Automatic frequency tracking technology is added in dynamic impedance matching, transmitting transducer working frequency is adjusted in real time, in difference
Under the conditions of time, temperature, environment etc., energy converter maintains efficiency optimization working condition always, realizes the closed-loop control of ultrasonic-frequency power supply,
Improve system effectiveness and stability.
Below with reference to attached drawing, technical solution of the present invention is described in detail.
Fig. 1 gives ultrasonic wireless electric energy transmission system energy transmission partial circuit topology.The height that ultrasonic-frequency power supply uses
Frequency inverter circuit is full-bridge topology, Q1And Q3、Q2And Q4Complementation conducting, corresponding drive waveforms are as shown in Figure 2.Motional impedance
Distribution network realizes that technology of frequency tracking is using phase control schemes, including electric current using LC matching and frequency tracing control
Voltage sample module, zero crossing detection module and DSP control module pass through driving circuit driving switch after DSP generates drive waveforms
Pipe.The high-frequency ac electric excitation transmitting transducer that ultrasonic-frequency power supply generates, converts electrical energy into ultrasonic wave and is emitted in medium.Ultrasound
Wave is transferred to reception energy converter by medium, receives energy converter for ultrasonic wave and is converted into high-frequency alternating current, receives what circuit used
It is bridge diode rectification and Buck pressure regulation topology.The high-frequency alternating current that energy converter generates is converted into directly by diode rectifier circuit
Voltage is adjusted to required DC voltage by galvanic electricity, Buck regulating circuit.
Fig. 2 drives for full-bridge and output voltage waveforms, wherein vABFor inverter circuit output voltage.t1~t2Moment, Q1And Q4
Conducting, vABIt is positive, t3~t4Moment, Q2And Q3Conducting, vABIt is negative, t2~t3For dead time.
Fig. 3 is voltage sample and zero cross detection circuit, and transducer excitation voltage passes through sampling resistor R1And R2Operation is sent to put
Big device both ends, by adjusting R3With R1Ratio change amplifier output voltage values.Voltage after sampling after comparator by realizing
Zero detection, is converted into square wave for the sine wave sampled and send to DSP.
Fig. 4 is current sample and zero cross detection circuit, flows through transducer current and passes through sinusoidal current after current sample chip
The sinusoidal current sampled is converted into square wave by realizing zero passage detection after comparator by the function of sampling, the electric current after sampling
It send to DSP.
Fig. 5 is frequency tracing control schematic diagram.Fig. 5 (a) is the phase angle characteristics of energy converter, the wherein impedance of C point energy converter
Minimum is best operating point, and transducer impedance angle is 0 degree at this time, and the voltage and current phase difference of energy converter is 0.When work frequency
Rate fsLower than resonance frequency frWhen, such as A point in Fig. 5 (a), impedance angle is negative at this time, and electric current leading voltage need to increase working frequency；
As working frequency fsHigher than resonance frequency frWhen, such as B point in Fig. 5 (a), impedance angle is positive at this time, and voltage leading current needs to reduce
Working frequency, Fig. 5 (b) are corresponding program flow diagram.
Fig. 6 is signal feedback loop working principle diagram.(transmitting is super by two micro-ultrasonic wave sensors for signal feedback loop
Sonic sensor receives ultrasonic sensor) and medium composition, it is divided into same medium with energy transmissive portion.Pass through identification number
The working condition of the change of signal 0 and 1 energy transmission part.When energy transmission part works normally, signal feedback loop is in
Off position, transmitting ultrasonic sensor pumping signal are number 0.At the end of loading charging, emit ultrasonic sensor
Pumping signal is 1, digital signal 1 is identified by receiving ultrasonic sensor, to control energy transmission part power cut-off shape
State.
The specific design example of of the invention one is as follows: output voltage Uo=24V, load resistance RL=50 Ω, series inductance
Lr=305uH；Shunt capacitance Cr=0.1uF；Energy converter resonance frequency: fr=40250Hz；Medium: metal 20mm.
Fig. 7 is system working waveform figure, wherein Uo、Io、u1、i1Respectively correspond load voltage, load current, transmitting transducing
Device voltage, transmitting transducer electric current.Switching frequency f at this times=40027Hz, Uo=24.7V, Pin=33W, Po=12.1W, η=
36.7%.
Fig. 8 (a), 8 (b) are current-voltage waveform figure when frequency-tracking not being added, under different frequency.Wherein u1、i1、u2、
i2Transmitting transducer voltage, transmitting transducer electric current are respectively corresponded, transducer voltage is received, receives transducer current.Fig. 8 (a)
Working frequency fs=40225Hz is less than energy converter resonance frequency fr=40250Hz, the electric current for flowing through transmitting transducer at this time are super
Its preceding both end voltage, impedance angle are negative, and system whole efficiency is 38.4% (rectification circuit is not added).The working frequency of Fig. 8 (b)
fs=40300Hz is greater than energy converter resonance frequency fr=40250Hz flows through its both ends electricity after the current hysteresis of transmitting transducer at this time
Pressure, impedance angle are positive, and system whole efficiency is 40.2%.
Fig. 9 be added frequency tracing control after current-voltage waveform figure, no matter initial operating frequency size, emit and connect
State as shown in Figure 10 can be adjusted to by energy converter both end voltage and current waveform, at this time transmitting transducer both end voltage and
Current in phase position, working frequency fs are maintained at energy converter resonance frequency frPlace, system whole efficiency (rectification are not added for 46.6%
Circuit).
Figure 10 is system effectiveness curve graph under different operating frequency, it can be seen that when energy converter works in resonance frequency
frWhen place, system effectiveness highest demonstrates dynamic matching method designed by the present invention to the optimization function of system effectiveness.
The above examples only illustrate the technical idea of the present invention, and this does not limit the scope of protection of the present invention, all
According to the technical idea provided by the invention, any changes made on the basis of the technical scheme each falls within the scope of the present invention
Within.
Claims (6)
1. a kind of ultrasonic wireless electric energy transmission system based on self adaptive control, it is characterised in that: including energy transmission part
With self adaptive control part, wherein energy transmissive portion point is including ultrasonic-frequency power supply, transmitting transducer, reception energy converter and receives electricity
Road, self adaptive control part include energy management module, signal feedback network and dynamic impedance matching；
In energy transmission part, direct current is converted into high-frequency alternating current to drive transmitting transducer by ultrasonic-frequency power supply, emits transducing
Device converts alternating current to ultrasonic wave using inverse piezoelectric effect and is sent in medium, is transferred to reception energy converter by medium；It connects
It receives energy converter and the ultrasonic wave received is converted into high-frequency alternating current using direct piezoelectric effect, by being converted into phase after receiving circuit
Answer the powered by direct current of voltage class to load；
In self adaptive control part, energy management module realizes the control for receiving circuit, and the state of load is converted into accordingly
Digital signal pass to signal feedback network；The load status signal received is transmitted to motional impedance by signal feedback network
In matching, dynamic impedance matching realizes the closed-loop control of ultrasonic-frequency power supply, and adjusts ultrasound according to the load status signal received
The working condition of power supply.
2. the ultrasonic wireless electric energy transmission system based on self adaptive control as described in claim 1, it is characterised in that: described
Medium is using empty gas and water or metal.
3. the ultrasonic wireless electric energy transmission system based on self adaptive control as described in claim 1, it is characterised in that: described
Receiving circuit includes bridge diode rectification circuit and Buck pressure regulation topology interconnected, and bridge diode rectification circuit will change
The high-frequency alternating current that energy device generates is converted into direct current, and voltage is adjusted to required DC voltage by Buck regulating circuit.
4. the ultrasonic wireless electric energy transmission system based on self adaptive control as described in claim 1, it is characterised in that: described
Ultrasonic-frequency power supply uses the high-frequency inverter circuit of full-bridge topology.
5. the ultrasonic wireless electric energy transmission system based on self adaptive control as claimed in claim 4, it is characterised in that: described
Dynamic impedance matching includes LC match circuit and frequency tracking circuit, and frequency tracking circuit includes current-voltage sampling module, mistake
Zero detection module and DSP control module, wherein the output end of the input terminal connection ultrasonic-frequency power supply of LC match circuit, and LC is matched
The input terminal of the output end connection current-voltage sampling module of circuit, the current-voltage sampling module is by the Current Voltage of sampling
It is sent into DSP control circuit, to generate drive waveforms, the switching tube in high-frequency inverter circuit is driven by driving circuit.
6. the ultrasonic wireless electric energy transmission system based on self adaptive control as described in claim 1, it is characterised in that: described
Signal feedback loop includes the transmitting ultrasonic sensor being linked in sequence, feedback medium and receives ultrasonic sensor, passes through knowledge
The working condition of other digital signaling zero and 1 change energy transmission part.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011431A (en) * | 2019-04-28 | 2019-07-12 | 辽宁工程技术大学 | A kind of ultrasonic coupling wireless charging system applied to human body implantation type equipment |
| CN111381532A (en) * | 2018-12-29 | 2020-07-07 | 重庆西山科技股份有限公司 | Frequency control device and ultrasonic transducer system |
| CN111671422A (en) * | 2020-05-08 | 2020-09-18 | 中国人民解放军军事科学院军事医学研究院 | Muscle fatigue detection system based on myoelectricity and pressure combined hybrid sensor |
| CN112217295A (en) * | 2020-09-27 | 2021-01-12 | 中国人民解放军海军工程大学 | Underwater wireless ultrasonic electric energy transmission device |
| CN112462653A (en) * | 2020-11-18 | 2021-03-09 | 上海大学 | Parallel general ultrasonic driving device |
| CN112462183A (en) * | 2020-12-03 | 2021-03-09 | 中北大学 | Method and system for determining optimum energy delivery frequency of sealed metal device |
| CN114069882A (en) * | 2021-11-16 | 2022-02-18 | 华东交通大学 | Self-powered low-voltage power supply system of high-voltage power cable and control method thereof |
| CN114142628A (en) * | 2021-12-06 | 2022-03-04 | 西安交通大学 | Ultrasonic isolation type power supply device for high-voltage power system |
| CN114709941A (en) * | 2022-04-22 | 2022-07-05 | 西安交通大学 | Distance-adaptive underwater ultrasonic wireless power transmission system |
| WO2023109119A1 (en) * | 2021-12-16 | 2023-06-22 | 山东省科学院海洋仪器仪表研究所 | Underwater ultrasonic radio energy transmission device and method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111381532A (en) * | 2018-12-29 | 2020-07-07 | 重庆西山科技股份有限公司 | Frequency control device and ultrasonic transducer system |
| CN110011431A (en) * | 2019-04-28 | 2019-07-12 | 辽宁工程技术大学 | A kind of ultrasonic coupling wireless charging system applied to human body implantation type equipment |
| CN111671422A (en) * | 2020-05-08 | 2020-09-18 | 中国人民解放军军事科学院军事医学研究院 | Muscle fatigue detection system based on myoelectricity and pressure combined hybrid sensor |
| CN112217295A (en) * | 2020-09-27 | 2021-01-12 | 中国人民解放军海军工程大学 | Underwater wireless ultrasonic electric energy transmission device |
| CN112462653A (en) * | 2020-11-18 | 2021-03-09 | 上海大学 | Parallel general ultrasonic driving device |
| CN112462183A (en) * | 2020-12-03 | 2021-03-09 | 中北大学 | Method and system for determining optimum energy delivery frequency of sealed metal device |
| CN114069882A (en) * | 2021-11-16 | 2022-02-18 | 华东交通大学 | Self-powered low-voltage power supply system of high-voltage power cable and control method thereof |
| CN114069882B (en) * | 2021-11-16 | 2024-01-30 | 华东交通大学 | Self-powered low-voltage power supply system of high-voltage power cable and control method thereof |
| CN114142628A (en) * | 2021-12-06 | 2022-03-04 | 西安交通大学 | Ultrasonic isolation type power supply device for high-voltage power system |
| CN114142628B (en) * | 2021-12-06 | 2024-05-28 | 西安交通大学 | Ultrasonic isolation type power supply device for high-voltage power system |
| WO2023109119A1 (en) * | 2021-12-16 | 2023-06-22 | 山东省科学院海洋仪器仪表研究所 | Underwater ultrasonic radio energy transmission device and method |
| CN114709941A (en) * | 2022-04-22 | 2022-07-05 | 西安交通大学 | Distance-adaptive underwater ultrasonic wireless power transmission system |
| CN114709941B (en) * | 2022-04-22 | 2024-05-07 | 西安交通大学 | Distance-adaptive underwater ultrasonic wireless power transmission system |
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