CN106208417A - Wireless charging system and the method quickly identifying wireless charging receiving terminal number - Google Patents
Wireless charging system and the method quickly identifying wireless charging receiving terminal number Download PDFInfo
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- CN106208417A CN106208417A CN201610755028.5A CN201610755028A CN106208417A CN 106208417 A CN106208417 A CN 106208417A CN 201610755028 A CN201610755028 A CN 201610755028A CN 106208417 A CN106208417 A CN 106208417A
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- 238000007600 charging Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008054 signal transmission Effects 0.000 claims abstract description 3
- 230000000977 initiatory effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- H02J5/005—
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- H02J7/025—
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Abstract
The invention discloses a kind of wireless charging system and the method quickly identifying wireless charging receiving terminal number, wireless charging system includes carrying out electric energy and the transmitting terminal of signal transmission and receiving terminal by coil, and described receiving terminal includes rectification circuit, output and control circuit, modulated signal producing circuit and modulation circuit；Described transmitting terminal includes inverter circuit, single-chip microcomputer and demodulator circuit, and described single-chip microcomputer connects coil by described inverter circuit.Described receiving terminal sends a certain number of modulated signal every a cycle regular time stochastic and dynamic, described transmitting terminal receives modulated signal by described coil, and the modulated signal of receiving terminals generations different in same a period of time is demodulated and counts, calculate the sum of receiving terminal.The technology of the present invention solves when being charged multiple receiving terminals with a transmitting terminal, and transmitting terminal can dynamically monitor the number of receiving terminal, reaches to detect foreign body, protect the purpose of security of system.
Description
Technical field
The present invention relates to wireless charging field, particularly relate to a kind of wireless charging system and based on this wireless charging system
The means of communication quickly identifying wireless charging receiving terminal number of system.
Background technology
In wireless charging system, transmitting terminal and receiving terminal can carry out the transmission of radio energy.The transmission of radio energy
Couple by the coil resonance between transmitting terminal with receiving terminal or sense and realize, but a safety, stable wireless charging
Electricity system, not only only includes the transmission of simple electric energy, it is necessary to include some Communication Control, to reach dynamic monitoring transmission
End and the state of receiving terminal.At this on the one hand, international several Major Leagues such as WPC and A4WP etc. has formulated some wireless chargings
The standard of electricity and communications protocol, as long as the equipment following these standards can compatible operations.
However as the extension of wireless charging range of application, and some special application scenarios or the system of customization, need
Simply and rapidly to set up communication mechanism so that transmitting terminal can identify the number of receiving terminal rapidly.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the transmitting terminal when present invention provides a kind of wireless charging
The wireless charging whether energy that can dynamically monitor receiving terminal number provides to confirm transmitting terminal mates with the number of receiving terminal
System and the method quickly identifying wireless charging receiving terminal number.
Technical scheme: for achieving the above object, the wireless charging system of the present invention includes transmitting terminal and receiving terminal, described
Sending end includes that inverter circuit, described receiving terminal include rectification circuit, is entered by coil between described inverter circuit and rectification circuit
Row electric energy and signal transmission, coil includes transmitting terminal coil and receiving terminal coil, both respectively with inverter circuit and rectification
Circuit connects；Described receiving terminal also includes being arranged on the output between rectification circuit and load and control circuit, for producing tune
The modulated signal producing circuit of signal processed and the modulation circuit being arranged between modulated signal producing circuit and rectification circuit；
Described transmitting terminal also includes single-chip microcomputer and demodulator circuit, and described single-chip microcomputer connects coil, described coil by described inverter circuit
The modulated signal received is transmitted back to described single-chip microcomputer by demodulator circuit after being demodulated.
Further, described transmitting terminal also includes transmitting terminal detection and protection circuit, the described reception being connected with single-chip microcomputer
End also includes receiving terminal protection circuit.
Further, described modulated signal producing circuit includes pseudo-random signal generator and judging circuit.
The method quickly identifying wireless charging receiving terminal number, described each receiving terminal is every cycle regular time
Stochastic and dynamic ground sends a certain number of modulated signal, and modulated signal is loaded onto described coil, described transmission by voltage form
Hold and receive modulated signal by described coil, and the modulated signal producing receiving terminals different in same a period of time is demodulated
And count, calculate the sum of receiving terminal.
Further, the production method of described modulated signal is: described pseudo-random signal generator produces pseudo-random sequence,
Described judging circuit judges sentence pre-set with of pseudo-random sequence that described pseudo-random signal generator currently exports
Disconnected sequence is the most equal, if pseudo-random sequence with judge that sequence is equal, then export modulated signal.
Further, described pseudo-random signal generator needs an initiation sequence, the production method of described initiation sequence
For: on the receive side electricity work time, gather receiving terminal original state time an analogue signal or digital signal generate described at the beginning of
Beginning sequence.
Further, described pre-set judge that sequence can be the arbitrary sequence in addition to complete " 0 " sequence, each
Judgement sequence in individual receiving terminal is the most equal.
Further, described initiation sequence gathers receiving terminal circuit again by a digital to analog converter in described receiving terminal
The commutating voltage of position later time point obtains.
Beneficial effect: present technology provides the means of communication of a kind of quick identification wireless charging receiving terminal number,
To solve when being charged multiple receiving terminals with a transmitting terminal, transmitting terminal can dynamically monitor the number of receiving terminal,
Make transmitting terminal can confirm that whether its gross energy provided mates with the number of receiving terminal, and then reach foreign body is examined
Survey, protect the purpose of security of system.
Accompanying drawing explanation
Accompanying drawing 1 is the composition frame chart of wireless charging system；
Accompanying drawing 2 is the modulated signal producing circuit of receiving terminal；
Fundamental diagram when accompanying drawing 3 powers on for wireless charging system；
The fundamental diagram of system when accompanying drawing 4 stops charging for receiving terminal；
Accompanying drawing 5 is the fundamental diagram of wireless charging system transmitting terminal identification receiving terminal number.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
Wireless charging system as described in Figure 1, including transmitting terminal and receiving terminal, described transmitting terminal includes inverter circuit,
Described receiving terminal includes rectification circuit, carries out electric energy by coil and signal passes between described inverter circuit and rectification circuit
Send；Described receiving terminal also includes being arranged on the output between rectification circuit and load and control circuit, for producing modulated signal
Modulated signal producing circuit and the modulation circuit that is arranged between modulated signal producing circuit and rectification circuit；Described
Sending end also includes single-chip microcomputer and demodulator circuit, and described single-chip microcomputer connects coil by described inverter circuit, and described coil receives
Modulated signal is transmitted back to described single-chip microcomputer by demodulator circuit after being demodulated.Described modulated signal producing circuit includes pseudo-random signal
Generator and judging circuit.
In order to ensure the safety of system, described transmitting terminal also includes transmitting terminal detection and the protection electricity being connected with single-chip microcomputer
Road, described receiving terminal also includes receiving terminal protection circuit.
The method quickly identifying wireless charging receiving terminal number based on above-mentioned wireless charging system, particularly as follows: described often
Individual receiving terminal sends a certain number of modulated signal every a cycle regular time stochastic and dynamic, and modulated signal is by electricity
Swaging formula is loaded onto described coil, described transmitting terminal by described coil receive modulated signal, and in same a period of time not
The modulated signal produced with receiving terminal is demodulated and counts, and calculates the sum of receiving terminal.
The production method of described modulated signal is: described pseudo-random signal generator produces pseudo-random sequence, described differentiation
The pseudo-random sequence that pseudo-random signal generator described in circuit judges currently the exports judgement sequence pre-set with is
No equal, if pseudo-random sequence with judge that sequence is equal, then export modulated signal.As in figure 2 it is shown, pseudo-random signal generator is
One linear feedback shift register, by selecting suitable feedback factor so that pseudo-random sequence has the longest pseudorandom
In the cycle, pseudo-random sequence now is also referred to as m-sequence, and m-sequence can travel through all states in addition to full 0, i.e. for a n
The linear feedback shift register of level, the cycle of pseudo-random sequence is p=2n-1.The generation mechanism of modulated signal, can pass through
Judging circuit judges pseudo-random sequence and a judgement sequence { a being previously setcThe most equal obtain, work as pseudo-random sequence
With judge sequence { acEqual time, send the modulated signal in a cycle.
Described pseudo-random signal generator initiation sequence { a0Production method be: on the receive side electricity work time, gather
An analogue signal or digital signal during receiving terminal original state generate described initiation sequence.Owing to receiving terminal existence itself is poor
The opposite sex and receiving terminal are placed into the diversity of the time above transmitting terminal and position etc., it is ensured that each receiving terminal obtains
{ a arrived0Each other will not be equal, thus farthest avoid the modulated signal that sends between different receiving terminal likely
The problem overlapped.Wherein { a in the present invention0Some after receiving terminal circuit resets is gathered by analog-digital converter (ADC)
The commutating voltage of time point obtains.
The specific works process of native system is as follows: as it is shown on figure 3, after transmitting terminal powers on, single-chip microcomputer just can work together,
Now transmitting terminal can be introduced into " Ping stage ", i.e. detects loitering phase, and single-chip microcomputer can intermittence be sent out with the tping time for the cycle
Sending the pulse width modulating signal (PWM ripple) of one period of short time, PWM ripple drives inverter circuit work so that coil two ends have
The current/voltage of alternation passes through, if now there being the existence of receiving terminal on transmitting terminal coil, then receiving terminal coil is the most permissible
Sense voltage, transmitting terminal by the curent change on coil it may determine that to there being the existence of receiving terminal, hence into normally
Working stage (Power Transfer stage), the single-chip microcomputer of transmitting terminal will persistently send PWM ripple, and receiving terminal is through Tdelay
The time delay of time starts to charge up so that transmitting terminal can persistently supply energy to receiving terminal；If transmitting terminal detects and does not connect
Receiving end exists, and will be constantly in the Ping stage.When receiving terminal stops charging (be full of or take away from transmitting terminal), as attached
Shown in Fig. 4, the single-chip microcomputer of transmitting terminal will not stop sending PWM ripple at once, until transmitting terminal is within cycle regular time
All being not detected by modulated signal, then it represents that receiving terminal stops charging, transmitting terminal just stops persistently sending PWM ripple, now sends
Holding and enter detection loitering phase (Ping stage) from normal work stage (Power Transfer stage), receiving terminal stops charging
Stop existing between transmission PWM ripple the time delay of Toff to transmitting terminal.
After transmitting terminal enters into normal work stage (Power Transfer stage), receiving terminal is received by coil
Alternating voltage (VAC) becomes DC voltage (VRECT) after over commutation so that the charging circuit of receiving terminal can normally work.
Receiving terminal charging circuit Main Function be the alternating voltage on coil after over commutation and some output control circuits permissible
There is provided a stable direct current output to load, can be stable voltage output or electric current output；It addition, the modulation of receiving terminal
Signal generating circuit also works together, and exports modulated signal pulse, and modulated signal is loaded into coil two ends by modulation circuit.Send out
Sending end receive modulated signal and demodulated after to be considered as this receiving terminal effective, transmitting terminal is by exchanging within a cycle
The counting of signal processed, i.e. may determine that how many receiving terminals are effective；Because the power that each receiving terminal receives is basic
Unanimously, as long as so the number of receiving terminal and the power of transmitting terminal output being compared and i.e. can determine whether that system is at transmitting terminal
No normal work, if transmit power is more than the power of receiving terminal aggregate demand, i.e. thinks that, with the presence of foreign body, transmitting terminal will be made
Alarm or directly turn off output, to protect the safety of system.As shown in Figure 5, receiving terminal Rx1, Rx2 ... Rx16 is respectively
Sending a modulated signal pulse in each period of time T, transmitting terminal is added up within the same time cycle and to be received
Pulse signal quantity, it is judged that receiving terminal number.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
1. wireless charging system, it is characterised in that: including transmitting terminal and receiving terminal, described transmitting terminal includes inverter circuit, described
Receiving terminal includes rectification circuit, carries out electric energy and signal transmission by coil between described inverter circuit and rectification circuit；Institute
State receiving terminal and also include being arranged on the output between rectification circuit and load and control circuit, for producing the modulation of modulated signal
Signal generating circuit and the modulation circuit being arranged between modulated signal producing circuit and rectification circuit；Described transmitting terminal is also
Including single-chip microcomputer and demodulator circuit, described single-chip microcomputer connects coil by described inverter circuit, the modulation letter that described coil receives
It is transmitted back to described single-chip microcomputer after number being demodulated by demodulator circuit.
Wireless charging system the most according to claim 1, it is characterised in that: described transmitting terminal also includes being connected with single-chip microcomputer
Transmitting terminal detection and protection circuit, described receiving terminal also includes receiving terminal protection circuit.
Wireless charging system the most according to claim 1, it is characterised in that: described modulated signal producing circuit include pseudo-with
Machine signal generator and judging circuit.
4. the method quickly identifying wireless charging receiving terminal number, it is characterised in that: described each receiving terminal is fixed every one
Time cycle stochastic and dynamic ground send a certain number of modulated signal, modulated signal is loaded onto described line by voltage form
Circle, described transmitting terminal receives modulated signal, and the modulation producing receiving terminals different in same a period of time by described coil
Signal is demodulated and counts, and calculates the sum of receiving terminal.
The method of quick identification wireless charging receiving terminal number the most according to claim 4, it is characterised in that: described modulation
The production method of signal is: described pseudo-random signal generator produce pseudo-random sequence, described judging circuit judge described puppet with
What the pseudo-random sequence that machine signal generator currently exports was pre-set with one judges that sequence is the most equal, if pseudorandom sequence
Arrange and judge that sequence is equal, then exporting modulated signal.
The method of quick identification wireless charging receiving terminal number the most according to claim 5, it is characterised in that: described puppet with
Machine signal generator needs an initiation sequence, and the production method of described initiation sequence is: on the receive side during electricity work, gather
An analogue signal or digital signal during receiving terminal original state generate described initiation sequence.
The method of quick identification wireless charging receiving terminal number the most according to claim 5, it is characterised in that: described is pre-
First set judges that sequence can be the arbitrary sequence in addition to complete " 0 " sequence, the judgement sequence phase in each receiving terminal
Deng.
The method of quick identification wireless charging receiving terminal number the most according to claim 6, it is characterised in that: described initially
Sequence gathers the commutating voltage of receiving terminal circuit reset later time point by a digital to analog converter in described receiving terminal
Obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610755028.5A CN106208417B (en) | 2016-08-26 | 2016-08-26 | Wireless charging system and method for rapidly identifying number of wireless charging receiving terminals |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610755028.5A CN106208417B (en) | 2016-08-26 | 2016-08-26 | Wireless charging system and method for rapidly identifying number of wireless charging receiving terminals |
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| Publication Number | Publication Date |
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| CN106208417A true CN106208417A (en) | 2016-12-07 |
| CN106208417B CN106208417B (en) | 2020-06-30 |
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Cited By (6)
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| CN107332360A (en) * | 2017-08-11 | 2017-11-07 | 宁波微鹅电子科技有限公司 | Radio energy transmission system, electric energy transmitting terminal, electric energy receiving terminal and detection method |
| CN107612347A (en) * | 2017-09-29 | 2018-01-19 | 哈尔滨工业大学 | Wireless energy and data synchronization transmissions system based on bilateral LCC compensation |
| CN108039894A (en) * | 2017-12-05 | 2018-05-15 | 无锡市瀚为科技有限公司 | Suitable for the communication disturbance restraining method between the multiple transmitting terminals of wireless charging system |
| CN108092657A (en) * | 2018-01-04 | 2018-05-29 | 无锡市瀚为科技有限公司 | A kind of capacitor type touch switch and its triggering method of touch electrode structuring |
| CN112564300A (en) * | 2020-12-03 | 2021-03-26 | 维沃移动通信有限公司 | Wireless charging receiving end, method and device and electronic equipment |
| CN113141063A (en) * | 2020-12-11 | 2021-07-20 | 未来穿戴技术有限公司 | Wireless power supply control method of fascia gun, fascia gun and readable storage medium |
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| CN106208417B (en) | 2020-06-30 |
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