CN207504649U - A kind of wireless charging device - Google Patents
A kind of wireless charging device Download PDFInfo
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- CN207504649U CN207504649U CN201721339519.8U CN201721339519U CN207504649U CN 207504649 U CN207504649 U CN 207504649U CN 201721339519 U CN201721339519 U CN 201721339519U CN 207504649 U CN207504649 U CN 207504649U
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Abstract
The utility model discloses a kind of wireless charging devices, and including transmitting terminal and receiving terminal, electromagnetic induction is generated by transmitting coil and receiving coil between transmitting terminal and receiving terminal；Transmitting terminal includes the step-down transformer, transmitting terminal rectification circuit, filter circuit, regulator circuit, the high-frequency inverter circuit that are sequentially connected, the decompression of 220V industrial-frequency alternating currents is 12V alternating currents by step-down transformer, transmitting terminal rectifier circuit rectifies are electric into 12V DC, stable 12V DC electricity is exported to high-frequency inverter circuit after filtered and voltage stabilizing, high-frequency inverter circuit inversion is 12V alternating currents, and magnetic field is generated in transmitting coil；Receiving terminal includes the receiving terminal rectification circuit being sequentially connected, receiving terminal filtering and regulator circuit and one-chip computer module, after receiving coil receives the energy of transmitting coil electromagnetic induction generation, through over commutation, filtering, a stable DC is obtained, one-chip computer module controls the direct current powering load.The utility model has the advantages that charge efficiency is high, speed is fast, compatibility is high.
Description
Technical field
The utility model is related to charging unit research field, more particularly to a kind of wireless charging device.
Background technology
As science and technology is grown rapidly, society is constantly progressive, and traditional charging technique can not meet the requirement of people, state
Inside and outside many famous enterprises have begun working on and apply wireless charging technology.It is different from traditional charging modes, wireless charging
As a kind of emerging charging technique, it does not need to be physically contacted electricity, but passes through electromagnetic induction, electromagnetic coupling or magnetic resonance
Etc. modes realize the transmission of electric energy, frequently plugged so as to avoid charging equipment plug, reduce the possibility of electric leakage so that
Charging modes become more conveniently, safely, reliably.
Present low-power wireless charging technique is used primarily in smart mobile phone, smartwatch, tablet computer and other small-sized intelligence
It can electronic equipment.Principle is that transmitting terminal and receiving terminal are made integrated circuit, is placed on inside cradle, by electromagnetic induction or
Electromagnetic coupling realizes the transmission of electric energy.High-power wireless charging is used in vehicle-mounted charge.
With traditional wired charging Technical comparing, wireless charging technology still has in transmission efficiency and wired charging technology
Larger gap, i.e. wireless charging technology can lose more energy；Charging rate is slower than wired charging；Cost of manufacture is slightly above
Wired charger；Compatibility is not high, because standard difficulty is unified, the wireless charger of different principle or different brands is likely to nothing
Method is general.
Utility model content
It, should the purpose of the utility model is to overcome, with deficiency, a kind of wireless charging device is provided the shortcomings that the prior art
Device has the advantages that charge efficiency is high, speed is fast, compatibility is high, especially for the equipment that some are inconvenient to replace battery,
Automatic charging can be realized by equipment described in the utility model, solve the problems, such as regular electric power supplement.
The purpose of this utility model is realized by following technical solution：A kind of wireless charging device, including transmitting terminal and
Receiving terminal generates electromagnetic induction between transmitting terminal and receiving terminal by transmitting coil and receiving coil；Transmitting terminal includes phase successively
Step-down transformer even, transmitting terminal rectification circuit, filter circuit, regulator circuit, high-frequency inverter circuit, step-down transformer is by 220V
Industrial-frequency alternating current decompression is 12V alternating current, and transmitting terminal rectification circuit is by 12V AC rectifications into 12V DC electricity, filtered electricity
Road filters and exports stable 12V DC electricity to high-frequency inverter circuit after regulator circuit, and high-frequency inverter circuit is inverse by 12V DC electricity
Become 12V alternating currents, magnetic field is generated in transmitting coil；
Receiving terminal includes the receiving terminal rectification circuit being sequentially connected, receiving terminal filtering and regulator circuit and one-chip computer module,
After receiving coil receives the energy of transmitting coil electromagnetic induction generation, filtered by receiving terminal rectifier circuit rectifies, receiving terminal
It is filtered with regulator circuit, obtains a stable DC, one-chip computer module controls the direct current powering load.
Preferably, the transmitting terminal rectification circuit uses single phase bridge type rectifier circu, and rectification is formed using four diodes
Bridge, diode model 1N4007.
Preferably, the filter circuit uses two capacitor filtering parallel filterings, and an electrolytic capacitor for 2200uF is used
It is exported to stablize, another is the monolithic capacitor of 0.1uf, for filtering off High-frequency Interference.
Preferably, the regulator circuit uses a L7812 voltage-stabiliser tubes, and in L7812 voltage-stabiliser tubes output terminal two use in parallel
The capacitance of spread of voltage caused by filtering and preventing L7812 voltage-stabiliser tube self-oscillations.
Preferably, it is humorous to include multi-resonant oscillating circuit, inverter bridge, inverter bridge driving circuit and series connection for the high-frequency inverter circuit
Vibrating network, multi-resonant oscillating circuit generate duty ratio and the controllable square wave of frequency, and inverter bridge driving circuit drives according to above-mentioned square wave
The break-make of metal-oxide-semiconductor in inverter bridge.
Further, the multi-resonant oscillating circuit uses NE555 multi-resonant oscillating circuits.Component used in the circuit
Less, principle is simple, it is easy to accomplish, and frequency and duty ratio are all adjustable.
Further, the inverter bridge uses single-phase full bridge inverter circuit.
Further, metal-oxide-semiconductor is managed using IRF3205MOS in the inverter bridge.
Further, the inverter bridge driving circuit use IR2110 driving chips, wherein in IR2110 chips from
Diode is lifted using fast recovery diode, model 1N5819.
Preferably, the receiving terminal rectification circuit uses the rectifier bridge that fast recovery diode forms.
Preferably, receiving terminal filtering and regulator circuit be using L7805 voltage-stabiliser tubes, makes output voltage stabilization in 5V,
Two are connect behind L7805 voltage-stabiliser tubes for reducing ripple coefficient and prevents self-oscillatory capacitance.Output voltage is made more to stablize.
Preferably, the receiving terminal further includes a current detection circuit, which is connected with one-chip computer module,
Specifically use MAX471 sensors.
Preferably, the receiving terminal further includes one for showing the charactron of voltage value, which passes through digital-to-analogue conversion
Module is connected with one-chip computer module.
Preferably, the one-chip computer module uses ATmega48 microcontrollers.
The utility model compared with prior art, has the following advantages that and advantageous effect：
Wireless charging device described in the utility model has the advantages that charge efficiency is high, speed is fast, compatibility is high, particularly
For the mini-plant that some are inconvenient to replace battery, automatic charging can be realized, can solve the problems, such as regular electric power supplement.
Description of the drawings
Fig. 1 is the system block diagram of the present embodiment.
Fig. 2 is the circuit diagram of the present embodiment transmitting terminal regulator rectifier circuit.
Fig. 3 is the circuit diagram of the present embodiment transmitting terminal filter circuit and regulator circuit.
Fig. 4 is the circuit diagram of the present embodiment transmitting terminal multi-resonant oscillating circuit.
Fig. 5 is the circuit diagram of the present embodiment transmitting terminal inverter bridge.
Fig. 6 is the circuit diagram of metal-oxide-semiconductor in the present embodiment transmitting terminal inverter bridge.
Fig. 7 is the circuit diagram of the present embodiment transmitting terminal inverter bridge driving circuit.
Fig. 8 is the circuit diagram of the present embodiment transmitting terminal series resonant network.
Fig. 9 is the circuit diagram of the filtering of the present embodiment receiving terminal and regulator circuit.
Figure 10 is the circuit diagram of the present embodiment arrival current detection circuit.
Specific embodiment
The utility model is described in further detail with reference to embodiment and attached drawing, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment
Referring to Fig. 1, a kind of system architecture of wireless charging device of the present embodiment is as shown in the figure, including transmitting terminal and reception
End generates electromagnetic induction between transmitting terminal and receiving terminal by transmitting coil and receiving coil, wherein：
Transmitting terminal includes the step-down transformer, transmitting terminal rectification circuit, filter circuit, regulator circuit, the high frequency that are sequentially connected
Inverter circuit, step-down transformer is by the decompression of 220V industrial-frequency alternating currents for 12V alternating currents, and transmitting terminal rectification circuit is by 12V alternating currents
12V DC electricity is rectified into, stable 12V DC electricity is exported after filtered circuit filtering and regulator circuit to high-frequency inversion electricity
The inversion of 12V DC electricity is 12V alternating currents by road, high-frequency inverter circuit, and magnetic field is generated in transmitting coil；
Receiving terminal includes the receiving terminal rectification circuit being sequentially connected, receiving terminal filtering and regulator circuit and one-chip computer module,
After receiving coil receives the energy of transmitting coil electromagnetic induction generation, filtered by receiving terminal rectifier circuit rectifies, receiving terminal
It is filtered with regulator circuit, obtains a stable DC, one-chip computer module controls the direct current powering load.
The circuit of transmitting terminal and receiving terminal is specifically described below.
First, transmitting terminal
1st, transmitting terminal rectification circuit
The power supply that the present embodiment uses is alternating current, and by 220V-12V transformer pressure-reducings, then transmitting terminal rectification circuit is whole
Flow into stable 12V voltages, the working power as inverter circuit.Common rectification circuit has the half-wave rectifying circuit, all-wave whole
Current circuit and bridge rectifier.The present embodiment uses single phase bridge type rectifier circu, and circuit is referring to Fig. 2.
Rectifier bridge element selects：1. select rectifier bridge stack；2. form rectifier bridge with four diodes.The two respectively has quality,
Four diodes of volume ratio shared by rectifier bridge stack are small, but the cost of rectifier bridge stack is higher；The rectifier bridge of diode composition
The impact resistance of single tube and heat dissipation are better than rectifier bridge stack.By comparing, selection forms rectifier bridge, two poles using four diodes
Pipe model 1N4007.
2nd, filter circuit and regulator circuit
By rectifier bridge come out be pulsating direct current because its fluctuation is very big, behind be required for capacitance or inductor filter.
The present embodiment uses two capacitor filtering parallel filterings, as shown in Figure 3.One electrolytic capacitor for 2200uF, it is defeated for stablizing
Go out, principle is that voltage can not be mutated at capacitance both ends, so can make direct current output smoothened in this way.Another capacitance
For the monolithic capacitor of 0.1uf, High-frequency Interference can be filtered off, output is made to become pure.Output voltage can rise after capacitor filtering
Height, output voltage U0Value be
Regulator circuit is as shown in figure 3, in order to obtain the voltage stabilizing of 12V output, the present embodiment has used L7812 voltage-stabiliser tubes.
L7812 voltage-stabiliser tubes are a circuit of three-terminal voltage-stabilizing integrated IC chip devices, and operating temperature range is -40 DEG C to+125 DEG C, is allowed
Input supply voltage maximum value is 35V, and minimum amount of voltage that 14V, output voltage values 12V, precision is about 2%, it is used
Simply, operation is light, the stability of output is good, internal restricted electric current, the protection circuit for preventing temperature excessively high, maximum output electricity
It flows for 1.5A, suitable for various power supply stabilization circuits.7812 output terminals, two capacitances of parallel connection, effect are filtering and prevent L7812
Spread of voltage caused by voltage-stabiliser tube self-oscillation.
3rd, high-frequency inverter circuit
High-frequency inverter circuit includes multi-resonant oscillating circuit, inverter bridge, inverter bridge driving circuit and series resonant network, multi resonant
Oscillating circuit generates duty ratio and the controllable square wave of frequency, and inverter bridge driving circuit drives MOS in inverter bridge according to above-mentioned square wave
The break-make of pipe.It is specific as follows.
3.1st, multi-resonant oscillating circuit
Multi-resonant oscillating circuit uses NE555 multi-resonant oscillating circuits, as shown in Figure 4.The multivibrator energy being made of NE555
Enough controllable square waves of generation duty ratio and frequency can pass through two potentiometers and adjust.Used component is less, principle letter
It is single, it is easy to accomplish, and frequency and duty ratio are all adjustable.
3.2nd, inverter bridge
The present embodiment inverter bridge uses single-phase full bridge inverter circuit, referring to Fig. 5.The circuit has power density greatly, easily
The advantages of control, high conversion efficiency.
Metal-oxide-semiconductor is managed using IRF3205MOS in inverter bridge.IRF3205MOS is a kind of N-channel MOS pipe, it has very low
Conduction impedance, switch time delay are small, dynamic dv/dt rates, 175 DEG C of operating temperatures, leadless environment-friendly, quick transfer efficiency and firm
HEXFET is designed so that the device that it becomes a kind of high efficient and reliable, has a wide range of application.Its internal structure is as shown in Figure 6.It is wherein resistance to
Pressure value VDSS=55V, conducting resistance RDS(on)=8.0m Ω, on-state drain current ID=5A.
3.3rd, inverter bridge driving circuit
In order to avoid two metal-oxide-semiconductors simultaneously turn on and cause to lead directly to above and below the same bridge arm of inverter bridge, one when the change of current
Surely the principle for first turning it on switching device shutdown again is deferred to, in the drive of two metal-oxide-semiconductors up and down of the same bridge arm of inverter bridge
Moving pulse must be complementary and there are enough dead times, prevents metal-oxide-semiconductor up and down because straight-through be burned.NE555 multi resonants
Dead time is not present in the square wave that oscillating circuit generates, it is therefore necessary to add in driving circuit.
IR2110 driving chips are the driving cores of International Rectifier Company companies of U.S. production
Piece, it also has light-coupled isolation, working frequency highest with no door lock CMOS technology and high voltage integrated circuit, existing electromagnetic isolation
500KHz is can reach, totem output current amplitude prevents the same bridge of inverter bridge up to 2A, the high included dead time of low side output
There is straight-through situation in arm.Delay is opened as 1120ns, turn-off delay 94ns, is metal-oxide-semiconductor and the dedicated gate drivings of IGBT
Chip.
IR2110 has the function of logic input, level translation and output protection.The high-end suspended power supply of chip is to pass through
Bootstrapping generate, as soon as therefore group power supply can just control upper and lower side, the quantity of the driving power of this reduction.Low side input channel
It is independent from each other with high-end input channel.
IR2110 driving circuit figures are as shown in Figure 7.On the one hand the square wave that NE555 multi-resonant oscillating circuits generate is input to U2's
High-end input terminal and U5Low-side input terminal, square wave reverse phase is on the other hand then input to by U by CD4069 chips2Low side
Input terminal and U5High-end input terminal.VCCIt is low side fixed power source, range is 10V-20V, VDDOne is logic power, and range is
5V-15V, two can be used in conjunction with 12V.
The high-end boostrap circuit principles of IR2110：As shown in fig. 7, the D in figure2And C4Respectively bootstrap diode and bootstrapping electricity
Hold.In inverter bridge during the IRF3205 shutdowns of bridge arm, VSCurrent potential be pulled down to ground, VCCPass through bootstrap diode D2
For bootstrap capacitor C4Charging.After IRF3205 conductings, bootstrap capacitor C4In VBAnd VSBetween formed a suspended power supply to IRF3205
Power supply.Bootstrap diode D2And D4Effect be output low-voltage when be connected, VCCTo charging bootstrap capacitor, output HIGH voltage
When diode by preventing bootstrap capacitor from discharging.Because the pulse frequency that NE555 multi-resonant oscillating circuits generate is 100KHz-
200KHz, so bootstrap diode D2And D4Common diode cannot be selected, to select fast recovery diode.Bootstrap diode
Model 1N5819.
3.4th, series resonant network
The inverter topology of series resonance is as shown in Figure 8.Wherein, L is loading coil, and R is load equivalent resistance, and C is
Series resonant capacitance (also known as compensating electric capacity).RLC collectively constitutes series resonant circuit, series resonance compensation can device it is more resistance to
Long, the delivery efficiency of inverter is high, switching loss is smaller, electromagnetic interference EMI is smaller, easy startup, therefore is used widely.
2nd, receiving terminal
1st, receiving terminal rectification circuit
The alternating current voltage frequency generated due to electromagnetic induction due to receiving coil is common between 100KHz-200KHz
The conducting speed of diode or rectifier bridge stack is unable to catch up with alternating current voltage frequency at all, so needing to use fast recovery diode group
Into rectifier bridge.
Fast recovery diode has excellent switching characteristic and extremely short reverse recovery time.It is maximum with general-purpose diode
Difference be that reverse recovery time is very short.In rectification circuit, the forward voltage for exchanging end is reversed suddenly, and forward current subtracts rapidly
It is zero less, then electric current inversely increases.When voltage reversal, the electrons and holes at diode both ends, can there is no contact
With equivalent into a capacitance, if the direction of the time changing both end voltage, then equivalent capacity will there are a chargings
Process, and reverse recovery time be exactly in fact equivalent capacity storage charge depletion time, the time by diode inside
It determines.There is PN junction inside common diode, and inside fast recovery diode be not PN junction, but PIN junction.As its name suggests,
PIN junction is compared with PN junction, it is that base area I is added between P-type semiconductor and N-type semiconductor, so as to form PIN junction.By
It is very thin in the thickness of base area I, the reverse recovery charge of very little can only be stored, therefore the forward voltage drop of fast recovery diode is more
Low, reverse recovery time is shorter, and pressure voltage higher is often applied on switch power supply road.
1N5819 is a kind of Schottky diode, it belongs to fast recovery diode.Its breakdown reverse voltage be 40V, peak
Value electric current is 25A, and forward direction presses 0.2V, positive average sustainable electric current 1A, cheap, meets the requirement of design.
2nd, receiving terminal filtering and regulator circuit
As shown in figure 9, the direct current of rectifier bridge output being made of 1N5819 is pulsating direct current, need by two capacitances
C2And C4Filtering, can just obtain having good stability and straight DC voltage.Since the rated voltage of mobile phone charging cannot
More than 5V, the operating voltage of microcontroller is between 1.8Vd-5.5V, so the present embodiment chooses L7805 voltage-stabiliser tubes, makes output electric
Pressure is stablized in 5V, is microcontroller, sensor and USB female seat power supply.It needs to connect two capacitances behind L7805 voltage-stabiliser tubes, effect is drop
Low ripple coefficient and self-oscillation is prevented, output voltage is made more to stablize.
L7805 is three-terminal voltage-stabilizing IC, inside not only have to current limit and prevent the function of overheat, also adjust pipe
Circuit is protected, usage is simple, cheap.The voltage of L7805 outputs is 5V, and error precision is about 3%.
3rd, current detection circuit
In order to make charging effect more intuitive, receiving terminal circuit devises the circuit of a display electric current.The size of electric current
It is acquired by MAX471 sensors.MAX471 is the chip of MAXIM companies production, is specifically used to detection size of current, it is
The current sense amplifier of one error precision very little.Circuit diagram is referring to Figure 10.
4th, one-chip computer module
The present embodiment one-chip computer module uses ATmega48 microcontrollers.
5th, charactron
Charactron is connected by D/A converter module with one-chip computer module.For showing voltage value.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiment of the utility model is not by above-mentioned
The limitation of embodiment, the change made under other any Spirit Essences and principle without departing from the utility model are modified, are replaced
In generation, simplifies combination, should be equivalent substitute mode, is included within the scope of protection of the utility model.
Claims (10)
1. a kind of wireless charging device, which is characterized in that including transmitting terminal and receiving terminal, pass through hair between transmitting terminal and receiving terminal
Ray circle and receiving coil generate electromagnetic induction；Transmitting terminal includes the step-down transformer being sequentially connected, transmitting terminal rectification circuit, filter
220V industrial-frequency alternating currents are depressured as 12V alternating currents, transmitting terminal by wave circuit, regulator circuit, high-frequency inverter circuit, step-down transformer
Rectification circuit is electric into 12V DC by 12V AC rectifications, and stable 12V is exported after filtered circuit filtering and regulator circuit
For direct current to high-frequency inverter circuit, the inversion of 12V DC electricity is 12V alternating currents by high-frequency inverter circuit, and magnetic is generated in transmitting coil
；
Receiving terminal includes the receiving terminal rectification circuit being sequentially connected, receiving terminal filtering and regulator circuit and one-chip computer module, receives
After coil receives the energy of transmitting coil electromagnetic induction generation, filtered by receiving terminal rectifier circuit rectifies, receiving terminal and steady
Volt circuit filters, and obtains a stable DC, one-chip computer module controls the direct current powering load.
2. wireless charging device according to claim 1, which is characterized in that the transmitting terminal rectification circuit uses single-phase bridge
Formula rectification circuit forms rectifier bridge, diode model 1N4007 using four diodes.
3. wireless charging device according to claim 1, which is characterized in that the filter circuit uses two capacitor filterings
Parallel filtering, an electrolytic capacitor for 2200uF export for stablizing, another is the monolithic capacitor of 0.1uf, for filtering off
High-frequency Interference.
4. wireless charging device according to claim 1, which is characterized in that the regulator circuit uses a L7812 voltage stabilizings
Pipe, and the voltage caused by two in parallel of L7812 voltage-stabiliser tubes output terminal is for filtering and preventing L7812 voltage-stabiliser tube self-oscillations is not
Stable capacitance.
5. wireless charging device according to claim 1, which is characterized in that the high-frequency inverter circuit includes multi-harmonic-oscillations
Circuit, inverter bridge, inverter bridge driving circuit and series resonant network, multi-resonant oscillating circuit generate duty ratio and the controllable side of frequency
Wave, inverter bridge driving circuit drive the break-make of metal-oxide-semiconductor in inverter bridge according to above-mentioned square wave.
6. wireless charging device according to claim 5, which is characterized in that the multi-resonant oscillating circuit is more using NE555
Resonance oscillation circuit；
The inverter bridge uses single-phase full bridge inverter circuit；
The inverter bridge driving circuit uses IR2110 driving chips, and the bootstrap diode wherein in IR2110 chips is using fast extensive
Multiple diode, model 1N5819；
The receiving terminal rectification circuit uses the rectifier bridge that fast recovery diode forms.
7. wireless charging device according to claim 6, which is characterized in that metal-oxide-semiconductor uses IRF3205 in the inverter bridge
Metal-oxide-semiconductor.
8. wireless charging device according to claim 1, which is characterized in that the receiving terminal filtering and regulator circuit use
L7805 voltage-stabiliser tubes make output voltage stabilization in 5V, and two are connect behind L7805 voltage-stabiliser tubes for reducing ripple coefficient and is prevented
Self-oscillatory capacitance.
9. wireless charging device according to claim 1, which is characterized in that the receiving terminal further includes current detecting electricity
Road, the current detection circuit are connected with one-chip computer module, specifically use MAX471 sensors.
10. wireless charging device according to claim 1, which is characterized in that the receiving terminal further includes one for showing
The charactron of voltage value, the charactron are connected by D/A converter module with one-chip computer module；
The one-chip computer module uses ATmega48 microcontrollers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339519.8U CN207504649U (en) | 2017-10-16 | 2017-10-16 | A kind of wireless charging device |
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|---|---|---|---|
| CN201721339519.8U CN207504649U (en) | 2017-10-16 | 2017-10-16 | A kind of wireless charging device |
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| CN207504649U true CN207504649U (en) | 2018-06-15 |
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ID=62500596
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808882A (en) * | 2018-07-16 | 2018-11-13 | 中惠创智无线供电技术有限公司 | Wireless power control device and method |
| CN109061653A (en) * | 2018-07-26 | 2018-12-21 | 中国民用航空飞行学院 | A kind of height measuring device and method based on unmanned plane |
| CN109103965A (en) * | 2018-10-10 | 2018-12-28 | 上海应用技术大学 | A kind of wireless charger and method |
| CN109966052A (en) * | 2019-03-21 | 2019-07-05 | 南京理工大学 | Intelligent dressing based on wireless power |
| CN110957815A (en) * | 2019-12-11 | 2020-04-03 | 国网山东省电力公司济南供电公司 | Low-power consumption wireless self-powered sensor |
-
2017
- 2017-10-16 CN CN201721339519.8U patent/CN207504649U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808882A (en) * | 2018-07-16 | 2018-11-13 | 中惠创智无线供电技术有限公司 | Wireless power control device and method |
| CN109061653A (en) * | 2018-07-26 | 2018-12-21 | 中国民用航空飞行学院 | A kind of height measuring device and method based on unmanned plane |
| CN109103965A (en) * | 2018-10-10 | 2018-12-28 | 上海应用技术大学 | A kind of wireless charger and method |
| CN109966052A (en) * | 2019-03-21 | 2019-07-05 | 南京理工大学 | Intelligent dressing based on wireless power |
| CN110957815A (en) * | 2019-12-11 | 2020-04-03 | 国网山东省电力公司济南供电公司 | Low-power consumption wireless self-powered sensor |
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