CN206878560U - Wireless charging system with In vivo detection function - Google Patents
Wireless charging system with In vivo detection function Download PDFInfo
- Publication number
- CN206878560U CN206878560U CN201720755691.5U CN201720755691U CN206878560U CN 206878560 U CN206878560 U CN 206878560U CN 201720755691 U CN201720755691 U CN 201720755691U CN 206878560 U CN206878560 U CN 206878560U
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- coil
- transmitting terminal
- transmitting
- radio energy
- metallic plate
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Abstract
Wireless charging system with In vivo detection function, including press close to or be close to the transmitting terminal metallic plate set with transmitting end-coil, transmitting terminal metallic plate has been sequentially connected with oscillating circuit and capacitive digital converter；The transmitting terminal MCU connects with capacitive digital converter, obtains the data signal of capacitive digital converter, and the control signal of system is generated according to the data signal of acquisition；Wireless power transmission method with In vivo detection function, by setting capacitance threshold value in transmitting terminal MCU, the relation between the electric capacity of capacitive digital converter output and capacitance threshold value is judged to judge whether to enter in radio energy transmission system with live body.The system and method, which can be identified in transmitting end-coil and the magnetic field for receiving power coil, whether there is being, and the security of radio energy transmission system can be greatly improved.
Description
Technical field
The invention belongs to wireless charging technical field, is related to a kind of wireless charging system, specifically, has work to be a kind of
The wireless charging system of detecting functions.
Background technology
Wireless power transmission is a kind of technology that electric energy transmission is carried out by external electromagnetic field coupling, and its major advantage is
It need not plug, it is easy to use；Electric spark will not be produced, can be used in inflammable and explosive industrial environment；Can be
Energy transmission is carried out in water, may apply in the submerged applications such as marine settings.
Radio energy transmission system mainly includes two parts, and a part is energy transmission, by transformation of electrical energy, by electric energy from
Transmitting terminal is wirelessly transmitted to receiving terminal；Another part is Control on Communication, is mainly used in completing between transmitting terminal and receiving device
Information and control interact, ensure whole system work safety and stability.
Energy transmissive portion point is divided into emitting portion and receiving portion again, generally passes through spaced discovery coil and reception
Coil transmits electric energy.Because this two parts is spatially completely in released state, the transmission of energy be by this two parts it
Between electromagnetic field carry out energy coupling, this electromagnetic field is the alternating magnetic field of a high frequency, when transmitting end-coil with receive end-coil
When vertical operation is distant (the wireless charging required distance of such as electric automobile is 15-25CM), between transmitting and receiving terminal
Space can enter toy or other biologies.Such as：Colder season in the winter time, electric automobile out of doors nobody
When wireless charging is carried out in the case of on duty, transmitting end-coil will enter magnetic with receiving temperature rise existing for end-coil, toy
Crouch down in and warmed oneself on transmitting end-coil.Organism is in for a long time may be by one in the magnetic field of high-frequency alternating
Fixed injury, for the consideration of humanity, it is desirable to which radio energy transmission system has the function of bio-identification, stops radio energy and passes
It is defeated, to take protection or the action for expelling toy to leave in next step.
And existing radio energy transmission system, the generally function without In vivo detection.
The content of the invention
It is an object of the invention to provide a kind of radio energy transmission system machine wireless charging with In vivo detection function
Method, the system can detect to launch end-coil and whether have live body entrance between receiving end-coil, to control radio
The work of energy transmitting terminal.
Present disclosure is：Wireless charging system with In vivo detection function, radio energy transmission system include connecting
The radio energy transmitting terminal to get access to grid and the radio energy that can be transmitted with radio energy transmitting terminal progress electric energy and communication signal connect
Receiving end, the radio energy transmitting terminal include transmitting end-coil, transmitting terminal MCU and the inverter circuit being connected with transmitting end-coil,
Transmitting terminal MCU connects through drive circuit with inverter circuit；The radio energy receiving terminal includes setting with transmitting terminal coil spacing
Reception end-coil；
Further comprise pressing close to or be close to the transmitting terminal metallic plate set with transmitting end-coil, transmitting terminal metallic plate sequentially connects
It is connected to oscillating circuit and capacitive digital converter；
The transmitting terminal MCU connects with capacitive digital converter, obtains the data signal of capacitive digital converter.
Preferably：Further comprise being arranged on transmitting terminal metallic plate and launch the transmitting terminal magnetic shielding material between end-coil
Plate, sequentially it is close to set between transmitting terminal metallic plate, transmitting terminal magnetic shielding material plate and transmitting end-coil three.
Preferably：Filter circuit is provided between oscillating circuit and capacitive digital converter.
Preferably：Radio energy receiving terminal further comprises pressing close to or be close to the receiving terminal metal set with receiving end-coil
Plate.
Preferably：Radio energy receiving terminal further comprises connecing between being arranged on receiving terminal metallic plate and launching end-coil
Receiving end magnetic shielding material plate,；Receiving terminal metallic plate, receiving terminal magnetic shielding material plate and reception end-coil three are sequentially close to set
Put.
Preferably：Transmitting terminal metallic plate and receiving terminal metallic plate preferably use aluminium sheet.
Beneficial effects of the present invention are：
(1) present invention proposes a kind of radio energy transmission system, can identify transmitting end-coil and receive power coil
It whether there is being in magnetic field, the security of radio energy transmission system can be greatly improved.
(2) by configuring metallic plate, oscillating circuit and filter circuit for radio energy transmitting terminal, detection, which accounts for, works as circuit inductance
The change of electric capacity, to determine whether that live body enters.This method is compared to the sensor plans such as optical sensor, microwave radar, tool
There is low-power consumption, low cost, high accuracy, contactless.
(3) by configuring metallic plate, magnetic shielding material plate for radio energy and transmitting terminal and radio energy receiving terminal, can enter
Row magnetic screen, electromagnetic exposure is reduced, improve the electric energy efficiency of transmission between transmitting terminal and receiving terminal.
Brief description of the drawings
Fig. 1 is wireless charging system structural representation；
Fig. 2 is In vivo detection electrical block diagram；
Fig. 3 is wireless charging method structural representation；
Fig. 4 is another embodiment wireless charging method structural representation.
Wherein, 1- launches end-coil, 2- transmitting terminal magnetic shield panels, 3- transmitting terminal metallic plates, 4- reception end-coils, 5- receptions
Hold magnetic shield panel, 6- receiving terminal metallic plates, 7- transmitting terminals MCU, 8- drive circuit, 9- inverter circuits, 10- oscillating circuits, 11- filters
Wave circuit, 12- capacitive digital converters, 13- live bodies
Embodiment
The embodiment of the present invention is clearly fully described by below with reference to accompanying drawing.Obviously, it is embodied
The part of the embodiment of the embodiment only present invention described by mode, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made,
Belong to protection scope of the present invention.
It is different from traditional wireless charging system the invention provides a kind of wireless charging system and charging method, this hair
Whether the wireless charging system of bright offer has In vivo detection function, can detect and be deposited between transmitting end-coil and reception end-coil
In being；It is different from traditional wireless charging method, wireless charging method provided by the invention can according to transmitting end-coil with
The work of wireless charging system is controlled with the presence or absence of live body between reception end-coil, avoids damaging live body.
With specific reference to Fig. 1, there is the wireless charging system of In vivo detection function, include the radio energy transmitting of connection power network
End and the radio energy receiving terminal that electric energy and communication signal transmission can be carried out with radio energy transmitting terminal.Wherein, radio energy is sent out
Penetrate and hold the transmitting terminal current rectifying and wave filtering circuit for including being connected with power network, launch end-coil 1, transmitting terminal MCU7 and with launching end-coil 1
Connected inverter circuit 9, transmitting terminal MCU7 connect through drive circuit 8 with inverter circuit 9；Radio energy receiving terminal includes and transmitting
End-coil 1 is spaced to receive end-coil 4, receives the received end rectifier filter circuit of the output signal of end-coil 4, DC/
Connected after DC mu balanced circuits with load.
It is spaced to launch end-coil 1 with receiving end-coil 4, has certain vertical range.And therebetween
Interval, some enough small-sized beings enter the magnetic field of high-frequency alternating.
In order to realize In vivo detection function, the transmitting terminal set gold is pressed close to or be close to further design with transmitting end-coil 1
Belong to plate 3, transmitting terminal metallic plate 3 has been sequentially connected with oscillating circuit 10 and capacitive digital converter 12；Transmitting terminal MCU7 and electric capacity number
Word converter phase 12 connects, and obtains the data signal of capacitive digital converter 12, and generate system according to the data signal of acquisition
Control signal, whether to control drive circuit 8 to inverter circuit output drive signal.
Transmitting terminal MCU7 is the core of whole wireless charging system control, in order to have In vivo detection function, transmitting
End MCU7 includes following functions module：
Capacitive digital converter signal receiving unit：For receiving the output signal of capacitive digital converter；
Threshold value storage unit：For storage capacitance data signal threshold value and capacitance difference threshold value, the electric capacity data signal threshold value
Standard of comparison will be used as, compared with the output signal of the capacitive digital converter received, comparative result further with electricity
Tolerance threshold value is compared；
Drive signal computing unit：For according to the defeated of electric capacity data signal threshold value and the capacitive digital converter received
Go out value to calculate electric capacity difference signal, and by the electric capacity difference signal being calculated compared with capacitance difference threshold value, tied according to comparing
Fruit controls whether to produce drive signal, to control the work of inverter circuit.
As a kind of more excellent design, transmitting terminal MCU7 further comprises following functions unit：
Timing unit：When live body enters transmitting end-coil 1 and receives end-coil 4, and capacitance difference is more than capacitance difference threshold value
Rise start timing, and count live body launch end-coil 1 and receive end-coil 4 when between the existing time；
Meanwhile the time existing for live body is calculated in order to coordinate, threshold value storage unit can also store a time threshold, driving letter
Number computing unit further by the time between when being present in end-coil 1 according to time threshold and live body and receiving end-coil 4 come
The generation of drive signal is controlled, to control the work of inverter circuit.
Oscillating circuit 10 in radio energy transmission system uses traditional LC oscillating circuits, with specific reference to Fig. 2, including simultaneously
Join the electric capacity C2 and inductance L1 of connection.When transmitting end-coil 1 and receive between end-coil 4 that to have live body 13 to enter fashionable, live body 13 with
An equivalent capacity C1, equivalent capacity C1 parallel coupleds access oscillating circuit 10 will be produced between transmitting terminal metallic plate 2.
Enter in no live body 13 it is fashionable, capacitive digital converter 12 be oscillating circuit 10 provide a resonant excitation electric current,
Then a voltage signal V1 for having certain frequency of oscillation is produced, voltage signal V1 can characterize oscillating capacitance C2 change (V1
The voltage signal exported for oscillating circuit 10, to characterize the capacitance variation of oscillating circuit 10).When live body 13 enters transmitting terminal
After between coil 1 and reception end-coil 4, equivalent capacity C1 parallel coupleds enter oscillating circuit 10, and oscillating circuit 10 can be made original
Resonant frequency f0Shift, so that voltage signal V1 produces change.Also, because equivalent capacity C1 is to be in wireless charging
In the high-frequency alternating magnetic field of electric system, so being the working frequency f for being superimposed wireless charging system above voltage signal V11With
Original resonant frequency f0.After the signal enters capacitive digital converter 12, the electric capacity number of a sign capacitance will be exported
Word signal, enter transmitting terminal MCU.Transmitting terminal MCU determines whether that live body 13 enters transmitting end-coil 1 according to this value
Between reception end-coil 4.
It is to be superimposed nothing above voltage signal if signal is directly entered capacitive digital converter 12 by oscillating circuit 10
The working frequency f of micro USB electric system1With original resonant frequency f0, in order to increase the stability of signal, further in oscillating circuit
Filter circuit 11 is set between 10 and capacitive digital converter 12.With specific reference to Fig. 2, filter circuit 11 is filtered using traditional LC
Circuit, its function are to filter out working frequency f1Signal, the signal for making to eventually arrive at capacitive digital converter 12 is only remaining
Original resonance frequency f0Voltage signal V2 (V2 be filter circuit 11 filter out the electricity formed after noise caused by high-frequency alternating magnetic field
Signal is pressed, can also be than the change of the sign capacitance of oscillating circuit 10).Voltage signal V1 is by inductance L2, electric capacity C2, work mould electricity
After feeling L3, the filter circuit that electric capacity C4 and C5 are formed, by working frequency f caused by wireless charging system1Signal filter out.
It is identical with principles described above, after voltage signal V2 enters capacitive digital converter 12, by one sign capacitance of output
Electric capacity data signal, enter transmitting terminal MCU.Transmitting terminal MCU determines whether that live body 13 enters hair according to this value
Penetrate between end-coil 1 and reception end-coil 4.
Further, in order to obtain Magnetic Shielding Effectiveness, electromagnetic exposure is reduced, further in transmitting terminal metallic plate 3 and hair
Penetrate and transmitting terminal magnetic shielding material plate 2 is set between end-coil 1, also, in order to avoid leakage field, by transmitting terminal metallic plate 3, transmitting terminal
Sequentially it is close to set between magnetic shielding material plate 2 and the transmitting three of end-coil 1.
Same principle, receiving terminal metallic plate 6 and receiving terminal magnetic shielding material plate 5 are also provided with radio energy receiving terminal,
Identical with the structure of wireless transmitting terminals, receiving terminal metallic plate 6, receiving terminal magnetic shielding material plate 5 and reception end-coil 4 three are sequentially
It is close to set.
More than, because aluminium sheet has more preferable electromagnetic shielding performance, therefore transmitting terminal metallic plate 3 and receiving terminal metallic plate 6 are adopted
Use aluminium sheet；Transmitting terminal magnetic shielding material plate 2 and receiving terminal magnetic shielding material plate 4 are using the material system with magnetic shield performance
Make.The combination of aluminium sheet and magnetic shielding material can further reduce electromagnetic exposure.
The radio energy transmission system with In vivo detection function based on more than, there is provided two kinds of wireless power transmission sides
Method.
The first wireless power transmission method, workflow comprise the following steps with specific reference to Fig. 3：
Interior setting capacitance threshold value X in transmitting terminal MCU threshold value storage units0, and capacitance difference threshold value a；
After starting work, system electrification, radio energy transmitting terminal is in holding state, when radio energy receiving terminal is close to nothing
During line electric energy transmitting terminal, radio energy transmitting terminal is waken up, and is started working.
In system work process, after the emitted end current rectifying and wave filtering circuit of power network electricity, industrial-frequency alternating current is set to be changed into direct current；Hair
Penetrate end MCU7 control circuits and produce PWM drive signal, direct current is become after inverter circuit 9 after the amplification of overdrive circuit 8
High-frequency alternating current is changed to, launches end-coil 1 for encouraging；Receive end-coil 4 and energy is obtained by magnetic coupling, and by receiving
Rectifier filter circuit is held, exports direct current.The direct current exports by DC/DC mu balanced circuits, with driving load.
Meanwhile in the course of work, electric capacity numeral is transferred to after the filtered filtering process of circuit 11 of output of oscillating circuit 10
Converter 12, transmitting terminal MCU obtain the output signal X of capacitive digital converter1, and with capacitance threshold value X0It is compared, obtains ratio
Compared with result b=X1-X0。
Comparative result b is compared with capacitance difference threshold value a, if b ＞ a, judgement has live body 13 to enter transmitting coil 1
Between receiving coil 4, drive signal control unit will stop sending driving control signal, radio to radio energy transmitting terminal
Energy transmitting terminal is stopped；Otherwise, judge there is no live body 13 between transmitting coil 1 and receiving coil 4, radio energy transmitting terminal and
Radio energy receiving terminal carries out the transmission of normal electric power signal and signal of communication.Wherein, stop especially by transmitting terminal MCU7
The mode of PWM drive signal is sent to drive circuit, radio energy transmitting terminal is stopped.
On the basis of the first wireless power transmission method, there is provided second of wireless power transmission method, workflow
With specific reference to Fig. 4, unlike the first wireless power transmission method, this method further comprises the steps：
The process of initialization and the transmission of normal wireless electric energy is identical with first method, and here is omitted；
But when computing unit obtain comparative result b compared with capacitance difference threshold value a, and during b ＞ a, determine whether
The existing time between transmitting coil 1 and receiving coil 4 of live body 13；
Setting time threshold value T in transmitting terminal MCU0；In the case of b ＞ a, timing unit is started working, transmitting terminal MCU7
Start timing, the meter b ＞ a duration is T1；If T1＞ T0, then when judging that live body is entered between transmitting coil and receiving coil
Between long enough, control radio energy transmitting terminal be stopped.
Because live body has larger flexibility, it is likely to after entering between transmitting coil 1 and receiving coil 4
Left in the section time, also, the short time is located in high frequency magnetic field will not also produce larger injury in itself to live body.As long as if sentence
The disconnected work for thering is live body just to stop radio energy transmitting terminal after entering, it would be possible to radio energy transmitting terminal can be caused frequently to hold
The work that row starts, stopped, influenceing its operating efficiency and the service life of device.Will using second of wireless power transmission method
It can be very good solve this problem.
As some Computer Aided Designs, radio energy transmitting terminal also includes being used for the input electricity for gathering inverter circuit input current
Sample circuit, the input voltage sample circuit for gathering inverter circuit input voltage are flowed, the sampled signal of the two is transferred to
Transmitting terminal MCU, the reference as transmitting terminal MCU output control signals.Radio energy receiving terminal also includes being used to gather receiving terminal
The commutating voltage sample circuit of rectifier filter circuit output voltage, and for gathering DC/DC mu balanced circuit output currents
With the output current voltage sampling circuit of voltage, the sampled signal of the two is transferred to receiving terminal MCU.When bearing for receiving terminal driving
The stability of whole system work can all be influenceed by carrying when change, device parameter shift, temperature rise change.In order to realize that radio energy passes
The stable operation of defeated system, at wireless receiving end and wireless transmitting terminals increase wireless radio-frequency communication module, by the state of receiving terminal
Information returns to transmitting terminal, realizes the closed-loop control of whole system.In this process, receiving terminal MCU can sample outlet side
Rectified voltage signal, and by being attached thereto the wireless communication module that radio frequency communications circuitry module is sent to transmitting end equipment.Hair
The outlet side commutating voltage value that end MCU can return according to the Radio-Frequency Wireless Communication module being attached thereto is penetrated, regulation PWM frequency, is accounted for
Sky ratio or phase export commutating voltage to stablize.The design innovative point it is not related to above, here is omitted.
Claims (6)
1. the wireless charging system with In vivo detection function, radio energy transmission system includes the radio energy hair of connection power network
Penetrate end and the radio energy receiving terminal of electric energy and signal transmission, the radio energy transmitting terminal can be carried out with radio energy transmitting terminal
Including transmitting end-coil, transmitting terminal MCU and with the inverter circuit that is connected of transmitting end-coil, transmitting terminal MCU through drive circuit with it is inverse
Become circuit to connect；The radio energy receiving terminal includes the reception end-coil set with transmitting terminal coil spacing；It is characterized in that：
Further comprise pressing close to or be close to the transmitting terminal metallic plate set with transmitting end-coil, transmitting terminal metallic plate has been sequentially connected with
Oscillating circuit and capacitive digital converter；
The transmitting terminal MCU connects with capacitive digital converter, obtains the data signal of capacitive digital converter.
2. there is the wireless charging system of In vivo detection function as claimed in claim 1, it is characterised in that：Further comprise setting
Put the transmitting terminal magnetic shielding material plate between transmitting terminal metallic plate and transmitting end-coil, transmitting terminal metallic plate, transmitting terminal magnetic cup
Cover and be sequentially close to set between plate of material and transmitting end-coil three.
3. there is the wireless charging system of In vivo detection function as claimed in claim 1, it is characterised in that：Oscillating circuit and electricity
Filter circuit is provided between appearance digital quantizer.
4. there is the wireless charging system of In vivo detection function as claimed in claim 1, it is characterised in that：Radio energy receives
End further comprises pressing close to or be close to the receiving terminal metallic plate set with receiving end-coil.
5. there is the wireless charging system of In vivo detection function as claimed in claim 4, it is characterised in that：Radio energy receives
End further comprises being arranged on receiving terminal metallic plate and launches the receiving terminal magnetic shielding material plate between end-coil；Receiving terminal metal
Plate, receiving terminal magnetic shielding material plate and reception end-coil three are sequentially close to set.
6. the wireless charging system with In vivo detection function as described in any one in claim 1 to 5, its feature exist
In：The transmitting terminal metallic plate and receiving terminal metallic plate use aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720755691.5U CN206878560U (en) | 2017-06-27 | 2017-06-27 | Wireless charging system with In vivo detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720755691.5U CN206878560U (en) | 2017-06-27 | 2017-06-27 | Wireless charging system with In vivo detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206878560U true CN206878560U (en) | 2018-01-12 |
Family
ID=61331697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720755691.5U Withdrawn - After Issue CN206878560U (en) | 2017-06-27 | 2017-06-27 | Wireless charging system with In vivo detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206878560U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124046A (en) * | 2017-06-27 | 2017-09-01 | 青岛鲁渝能源科技有限公司 | Wireless charging system and wireless charging method with In vivo detection function |
| CN116719093A (en) * | 2023-08-10 | 2023-09-08 | 中天宽带技术有限公司 | Circuit and method for detecting ground power supply system immersion and entering of living things |
-
2017
- 2017-06-27 CN CN201720755691.5U patent/CN206878560U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107124046A (en) * | 2017-06-27 | 2017-09-01 | 青岛鲁渝能源科技有限公司 | Wireless charging system and wireless charging method with In vivo detection function |
| CN107124046B (en) * | 2017-06-27 | 2023-08-22 | 青岛鲁渝能源科技有限公司 | Wireless charging system with living body detection function and wireless charging method |
| CN116719093A (en) * | 2023-08-10 | 2023-09-08 | 中天宽带技术有限公司 | Circuit and method for detecting ground power supply system immersion and entering of living things |
| CN116719093B (en) * | 2023-08-10 | 2023-10-20 | 中天宽带技术有限公司 | Circuit and method for detecting ground power supply system immersion and entering of living things |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20230822 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180112 Effective date of abandoning: 20230822 |