CN207677488U - Wireless charging circuit based on electronic tag - Google Patents
Wireless charging circuit based on electronic tag Download PDFInfo
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- CN207677488U CN207677488U CN201820114059.7U CN201820114059U CN207677488U CN 207677488 U CN207677488 U CN 207677488U CN 201820114059 U CN201820114059 U CN 201820114059U CN 207677488 U CN207677488 U CN 207677488U
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Abstract
The utility model proposes a kind of wireless charging circuit based on electronic tag, battery charger connection former tag coil circuits；Former tag coil loop response generates electric current in the electromagnetic signal of reader coil antenna, and charges to battery charger；Signal conditioning circuit is connected in parallel between former tag coil circuit and battery charger, and the radiofrequency signal in former tag coil circuit, which is transformed into direct current signal, is transmitted to battery charger；Battery charger includes regulator circuit, starting switch pipe and rechargeable battery；Regulator circuit connection signal modulate circuit receives direct current signal and carries out voltage stabilizing and provide startup level；The non-controlling both ends of starting switch pipe are connected on the link circuit of regulator circuit and rechargeable battery, when the output level of the startup level output end of regulator circuit reaches and starts level, starting switch pipe are connected, charges to rechargeable battery to which link circuit be connected.Wireless charging can be conveniently realized, and the Communication Jamming to tag coil can be reduced.
Description
Technical field
The utility model is related to charging circuit technology more particularly to a kind of wireless charging electricity based on electronic tag
Road.
Background technology
Currently, RFID (radio frequency identification) technology etc. is widely used, label usually with read-write system (or read
Write device, card reader etc.) it is used cooperatively, it, can be between read-write system after label enters the magnetic field of read-write system antenna transmitting
Radio communication is carried out, realizes " swiping the card " record.According to inside tags power supply, whether there is or not RFID tag is divided into passive type, semi-passive
(also referred to as semi-active type), active three classes.Unlike passive type and semi-passive, active tag itself has inside
Power supply unit, to supply power supply needed for internal IC to generate external signal.
Current tag-powered mode is that the battery that additional setting charger comes in label charges, in this mode
It needs to carry charger at one's side and to ensure having chargeable place, it is very inconvenient；Or charge coil is additionally set
Incude external coil transmission and the wireless signal that arrives realizes wireless charging, but charge coil can be to label in this mode
The performance of coil has an impact, and the communication with read-write system is caused to be interfered.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of wireless charging circuits based on electronic tag, can be square
Just it realizes wireless charging, and the Communication Jamming to tag coil can be reduced.
To solve the above problems, the utility model proposes a kind of wireless charging circuits based on electronic tag, including：Original mark
Sign wire loop, signal conditioning circuit and battery charger；
The battery charger connection former tag coil circuit；The original tag coil loop response is in reader
The electromagnetic signal of coil antenna and generate electric current, and charge to the battery charger；
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to incite somebody to action
The radiofrequency signal in the original tag coil circuit is transformed into direct current signal and is transmitted to the battery charger；
The battery charger includes regulator circuit, starting switch pipe and rechargeable battery；The regulator circuit connects institute
Signal conditioning circuit is stated, the direct current signal is received and carries out voltage stabilizing and startup level is provided；The non-controlling of the starting switch pipe
Both ends are connected on the link circuit of the regulator circuit and rechargeable battery, and the control terminal connection of the starting switch pipe is described steady
The startup level output end of volt circuit reaches startup level in the output level of the startup level output end of the regulator circuit
When, the starting switch pipe is connected, charges to the rechargeable battery to which the link circuit be connected.
One embodiment according to the present utility model, the regulator circuit include zener diode and first resistor；It is described
The anode of zener diode is connect with the first end of the first resistor, and the cathode of the zener diode connects the signal tune
The outlet side anode of circuit is managed, the second end of the first resistor connects the outlet side cathode of the signal conditioning circuit；It is described
The first end of first resistor is also connected with the control terminal of the starting switch pipe.
One embodiment according to the present utility model, described in the control terminal of the starting switch pipe is connected by second resistance
The first end of the first end of first resistor, the starting switch pipe connects the cathode of the rechargeable battery, the starting switch pipe
Second end connect the second end of the first resistor.
One embodiment according to the present utility model, the battery charger further include 3rd resistor and light-emitting diodes
Pipe；The anode of the light emitting diode connects the cathode of the rechargeable battery, is opened described in the cathode connection of the light emitting diode
The first end of dynamic switching tube；The 3rd resistor is connected in parallel on the both ends of the light emitting diode.
One embodiment according to the present utility model, the battery charger further include the first diode；One or two pole
The anode of pipe connects the cathode of the zener diode, and the cathode of the first diode connects the anode of the rechargeable battery.
One embodiment according to the present utility model, the original tag coil circuit includes the tag coil for connecting into circuit
And RFID chip, and first capacitance in parallel with the tag coil.
One embodiment according to the present utility model, the signal conditioning circuit are half-wave rectifying circuit, and the half-wave is whole
Current circuit includes the second diode and the second capacitance；The anode of second diode connects the first end of the tag coil,
The cathode of second diode connects the first end of second capacitance and as the outlet side of signal conditioning circuit anode；Institute
The second end for stating the second capacitance connects the second end of the tag coil and the outlet side cathode as signal conditioning circuit.
One embodiment according to the present utility model, the signal conditioning circuit further include third capacitance, are serially connected in described
In the circuit that tag coil and RFID chip are linked to be, the access system that the RFID chip is adjusted in the third capacitance is adjusted
Number.
One embodiment according to the present utility model, the signal conditioning circuit are voltage-doubling boost circuit, the multiplication of voltage liter
Volt circuit includes the 4th capacitance, third diode, the 4th diode and the 5th capacitance；The first end of 4th capacitance connects institute
State the first end of tag coil, the anode of the second end connection third diode of the 4th capacitance；The cathode of third diode
Connect the first end of the 5th capacitance and as the outlet side of signal conditioning circuit anode；The second end of 5th capacitance connects institute
State the second end of tag coil and the outlet side cathode as signal conditioning circuit；Described in the anode connection of 4th diode
The cathode of the second end of 5th capacitance, the 4th diode connects the second end of the 4th capacitance.
One embodiment according to the present utility model adjusts the 4th capacitance and connecing for the battery charger is adjusted
Enter coefficient.
After adopting the above technical scheme, the utility model has the advantages that compared with prior art：
Charging circuit has been connected in parallel on former tag coil circuit, wireless charging function may be implemented, it is additional without increasing
Charger, the supplement of the energy content of battery just can be realized during label communicates, can without additional charge coil is arranged
Charge coil is avoided to influence the performance of tag coil；Regulator circuit has certain voltage stabilizing process, by starting level to filling
The control of electricity triggering, only regulator circuit have reached certain voltage of voltage regulation, just start charging, can reduce charging circuit to label
Communication interference between read-write system.
Description of the drawings
Fig. 1 is the electrical block diagram of the wireless charging circuit based on electronic tag of one embodiment of the utility model；
Fig. 2 is the circuit structure signal of the wireless charging circuit based on electronic tag of another embodiment of the utility model
Figure.
Specific implementation mode
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings to this
The specific implementation mode of utility model is described in detail.
Many details are elaborated in the following description in order to fully understand the utility model.But this practicality is new
Type can be much to implement different from other manner described here, and those skilled in the art can be new without prejudice to this practicality
Similar popularization is done in the case of type intension, therefore the utility model is not limited by following public specific implementation.
In one embodiment, the utility model proposes a kind of wireless charging circuits based on electronic tag, including：Original mark
Sign wire loop, signal conditioning circuit and battery charger.Former tag coil circuit can be script in existing electronic tag
The tag coil circuit just having, the induction transmitting-receiving of electromagnetic wave may be implemented in coil, to realize label chip and external read-write
The communication of wireless signal between system.
The battery charger connection former tag coil circuit, surely not influences former tag coil circuit itself
Connection relation.The original tag coil loop response generates electric current in the electromagnetic signal of reader coil antenna, and to institute
Battery charger is stated to charge.When former tag coil circuit is in the readable range of read-write system, it may occur that communication,
Thus former tag coil circuit can generate corresponding electric current because of electromagnetic induction.For example, when electronic tag is swiped the card to read-write system
When, the moment swiped the card will produce electromagnetic signal, to charge to the rechargeable battery in it.
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to incite somebody to action
The radiofrequency signal in the original tag coil circuit is transformed into direct current signal and is transmitted to the battery charger.Due to former label line
What is generated in circle circuit is the radiofrequency signal generated by electromagnetism, that is, AC signal, thus signal conditioning circuit is by radio frequency
Signal is converted to direct current signal, to be suitable for charging to rechargeable battery, can also play some other functions certainly.
Referring to Fig. 1 and Fig. 2, the battery charger includes regulator circuit, starting switch pipe Q1 and rechargeable battery U2.Institute
It states regulator circuit and connects the signal conditioning circuit, receive the direct current signal and carry out voltage stabilizing and startup level is provided, start electricity
Flat the case where can reflecting voltage of voltage regulation, the value of voltage of voltage regulation can be less than by starting level.Rechargeable battery U2 for example can be
Lithium battery.Regulator circuit is specifically unlimited.
The non-controlling both ends of the starting switch pipe Q1 are connected to the link circuit of the regulator circuit and rechargeable battery U2
On, the control terminal of the starting switch pipe Q1 connects the startup level output end of the regulator circuit.Starting switch pipe Q1 can be with
It is triode, MOS transistor etc., as long as it is equal to reach the switching tube that the when of starting level is connected in the level of control terminal
It is applicable in.Starting switch pipe Q1, which is not up to, starts the state that level is then held off.It is exported in the startup level of the regulator circuit
When the output level at end reaches startup level, the starting switch pipe Q1 is connected, is filled to described to which the link circuit be connected
Battery U2 charges, as long as that is, the level of the startup level output end output of regulator circuit has reached startup level,
It can start to start charging, otherwise not start.
Charging circuit has been connected in parallel on former tag coil circuit, wireless charging function may be implemented, it is additional without increasing
Charger, the supplement of the energy content of battery just can be realized during label communicates, can without additional charge coil is arranged
Charge coil is avoided to influence the performance of tag coil；Regulator circuit has certain voltage stabilizing process, by starting level to filling
The control of electricity triggering, only regulator circuit have reached certain voltage of voltage regulation, just start charging, can reduce charging circuit to label
Communication interference between read-write system.
With continued reference to Fig. 1 and Fig. 2, it is preferred that the regulator circuit includes zener diode D3 and first resistor R3.It is described
The anode of zener diode D3 is connect with the first end of the first resistor R3, described in the cathode connection of the zener diode D3
The outlet side anode of signal conditioning circuit, the outlet side that the second end of the first resistor R3 connects the signal conditioning circuit are negative
Pole；The first end of the first resistor R3 is also connected with the control terminal of the starting switch pipe Q1, that is, the first end of first resistor R3
It is the startup level output end of regulator circuit.It is appreciated that the regulator circuit of the present embodiment is only an example, may be used also certainly
It to be other regulator circuits, or makes certain improvements on this basis, such as first resistor R3 is extended to resistance net etc.
It is unlimited.
Preferably, the control terminal of the starting switch pipe Q1 connects the first of the first resistor R3 by second resistance R2
End, the first end of the starting switch pipe Q1 connect the cathode of the rechargeable battery U2, the second end of the starting switch pipe Q1
Connect the second end of the first resistor R3.In fig. 1 and 2, starting switch pipe Q1 is a NPN triode, emitter connection
The cathode of rechargeable battery U2, collector connect the second end of first resistor R3, and base stage (control terminal) is connected by second resistance R2
The first end of first resistor R3.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the battery charger further includes 3rd resistor R7 and hair
Optical diode D4.The anode of the light emitting diode D4 connects the cathode of the rechargeable battery U2, the light emitting diode D4's
Cathode connects the first end of the starting switch pipe Q1；When reaching startup voltage, the Q1 conductings of starting switch pipe, light emitting diode
D4 is accessed in cell circuit, can be by the brightness change of light emitting diode D4 come straight to shine in charging process
The size that ground obtains charging current is seen, current charging rate is known, charging can be disconnected when suitable.The 3rd resistor
R7 is connected in parallel on the both ends of the light emitting diode D4；3rd resistor R7 can reduce the brightness of light emitting diode D4, avoid brightness
It crosses bright.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the battery charger further includes the first diode D2.The
The anode of one diode D2 connects the cathode of the zener diode D3, and the cathode of the first diode D2 connects the rechargeable battery
The anode of U2.First diode D2 can prevent rechargeable battery U2 electric currents from pouring in down a chimney.In fig. 1 and 2, the first diode D2 is being just
It is also connected with a resistance R1 between pole and the cathode of zener diode D3, current limliting can be used for, ensures label chip and reading when charging
Write the normal communication of system.
In one embodiment, with continued reference to Fig. 1 and Fig. 2, the original tag coil circuit includes the mark for connecting into circuit
Sign coil CO2 and RFID chip U1, and the first capacitance C1 in parallel with the tag coil CO2.Tag coil CO2 and read-write are
The coil CO1 of uniting is antenna, is communicated between the two by electromagnetic induction, tag coil CO2 in response to read-write system coil CO1 and
Radiofrequency signal is generated in the loop, to transmit corresponding signal into RFID chip U1, is started simultaneously to battery charger
Transmit signal.First capacitance C1 can play the role of adjusting resonance, can replace the first capacitance C1 of different sizes.
In one embodiment, referring to Fig. 1, the signal conditioning circuit is half-wave rectifying circuit, passes through halfwave rectifier electricity
Road can realize transformation of the radiofrequency signal to direct current signal.The half-wave rectifying circuit includes the second diode D1 and the second capacitance
C2；The anode of the second diode D1 connects the first end of the tag coil CO2, and the cathode of the second diode D1 connects
Connect the first end of the second capacitance C2 and as the outlet side of signal conditioning circuit anode；The second end of the second capacitance C2
Connect the second end of the tag coil CO2 and the outlet side cathode as signal conditioning circuit.
Further, in Fig. 1, the signal conditioning circuit can also include third capacitance C3.Third capacitance C3 concatenations
In the circuit that the tag coil CO2 and RFID chip U1 are linked to be, it is specifically connected to the outlet line of RFID chip U1
On.The size of the third capacitance C3 is adjusted, the connected factor of the RFID chip U1 is adjusted so that RFID chip U1 and mark
Sign the resonance frequency matches of coil CO2.
In one embodiment, referring to Fig. 2, the signal conditioning circuit is voltage-doubling boost circuit, passes through voltage-doubling boost electricity
Road may be implemented to be amplified voltage while rectification.The voltage-doubling boost circuit includes the 4th capacitance C4, third diode
D5, the 4th diode D8 and the 5th capacitance C6；The first end of the 4th capacitance C4 connects the first of the tag coil CO2
End, the anode of the second end connection third diode D5 of the 4th capacitance C4；The cathode connection described the of third diode D5
The first end of five capacitance C6 and as the outlet side of signal conditioning circuit anode；The second end of 5th capacitance C6 connects the label
The second end of coil CO2 and outlet side cathode as signal conditioning circuit；Described in the anode connection of the 4th diode D8
The cathode of the second end of 5th capacitance C6, the 4th diode D8 connects the second end of the 4th capacitance C4.
Preferably, in Fig. 2, the access system of the battery charger is adjusted in the size for adjusting the 4th capacitance C4
Number, when battery charger changes, thus it is possible to vary the size of the 4th capacitance C4 realizes the tune of battery charger connected factor
It is whole.
Although the utility model is disclosed as above with preferred embodiment, it is not for limiting claim, Ren Heben
Field technology personnel without departing from the spirit and scope of the utility model, can make possible variation and modification, therefore
The scope of protection of the utility model should be subject to the range that the utility model claims are defined.
Claims (10)
1. a kind of wireless charging circuit based on electronic tag, which is characterized in that including：Former tag coil circuit, signal condition
Circuit and battery charger；
The battery charger connection former tag coil circuit；The original tag coil loop response is in reader coil
The electromagnetic signal of antenna and generate electric current, and charge to the battery charger；
The signal conditioning circuit is connected in parallel between the former tag coil circuit and the battery charger, to will be described
The radiofrequency signal in former tag coil circuit is transformed into direct current signal and is transmitted to the battery charger；
The battery charger includes regulator circuit, starting switch pipe and rechargeable battery；The regulator circuit connects the letter
Number modulate circuit receives the direct current signal and carries out voltage stabilizing and provide startup level；The non-controlling both ends of the starting switch pipe
It is connected on the link circuit of the regulator circuit and rechargeable battery, the control terminal of the starting switch pipe connects the voltage stabilizing electricity
The startup level output end on road is led when the output level of the startup level output end of the regulator circuit reaches and starts level
Lead to the starting switch pipe, charges to the rechargeable battery to which the link circuit be connected.
2. the wireless charging circuit based on electronic tag as described in claim 1, which is characterized in that the regulator circuit includes
Zener diode and first resistor；The anode of the zener diode is connect with the first end of the first resistor, the voltage stabilizing
The cathode of diode connects the outlet side anode of the signal conditioning circuit, and the second end of the first resistor connects the signal
The outlet side cathode of modulate circuit；The first end of the first resistor is also connected with the control terminal of the starting switch pipe.
3. the wireless charging circuit based on electronic tag as claimed in claim 2, which is characterized in that the starting switch pipe
Control terminal connects the first end of the first resistor by second resistance, and the first end of the starting switch pipe connects the charging
The second end of the cathode of battery, the starting switch pipe connects the second end of the first resistor.
4. the wireless charging circuit based on electronic tag as claimed in claim 3, which is characterized in that the battery charger
Further include 3rd resistor and light emitting diode；The anode of the light emitting diode connects the cathode of the rechargeable battery, the hair
The cathode of optical diode connects the first end of the starting switch pipe；The 3rd resistor is connected in parallel on the two of the light emitting diode
End.
5. the wireless charging circuit based on electronic tag as claimed in claim 3, which is characterized in that the battery charger
It further include the first diode；The anode of first diode connects the cathode of the zener diode, and the cathode of the first diode connects
Connect the anode of the rechargeable battery.
6. the wireless charging circuit based on electronic tag as described in claim 1, which is characterized in that the original tag coil is returned
Road includes connecting into the tag coil and RFID chip in circuit, and first capacitance in parallel with the tag coil.
7. the wireless charging circuit based on electronic tag as claimed in claim 6, which is characterized in that the signal conditioning circuit
For half-wave rectifying circuit, the half-wave rectifying circuit includes the second diode and the second capacitance；The anode of second diode
The first end of the tag coil is connected, the cathode of second diode connects the first end of second capacitance and as letter
The outlet side anode of number modulate circuit；The second end of second capacitance connects the second end of the tag coil and as signal
The outlet side cathode of modulate circuit.
8. the wireless charging circuit based on electronic tag as claimed in claim 7, which is characterized in that the signal conditioning circuit
Further include third capacitance, be serially connected in the circuit that the tag coil and RFID chip are linked to be, adjusting the third capacitance can
Adjust the connected factor of the RFID chip.
9. the wireless charging circuit based on electronic tag as claimed in claim 6, which is characterized in that the signal conditioning circuit
For voltage-doubling boost circuit, the voltage-doubling boost circuit includes the 4th capacitance, third diode, the 4th diode and the 5th capacitance；
The first end of 4th capacitance connects the first end of the tag coil, and the second end of the 4th capacitance connects the three or two pole
The anode of pipe；The cathode of third diode connect the first end of the 5th capacitance and outlet side as signal conditioning circuit just
Pole；The second end of 5th capacitance connects the second end of the tag coil and the outlet side cathode as signal conditioning circuit；Institute
The anode for stating the 4th diode connects the second end of the 5th capacitance, cathode connection the 4th electricity of the 4th diode
The second end of appearance.
10. the wireless charging circuit based on electronic tag as claimed in claim 9, which is characterized in that adjustment the 4th electricity
Hold the connected factor that the battery charger is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820114059.7U CN207677488U (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820114059.7U CN207677488U (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207677488U true CN207677488U (en) | 2018-07-31 |
Family
ID=62973732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820114059.7U Active CN207677488U (en) | 2018-01-23 | 2018-01-23 | Wireless charging circuit based on electronic tag |
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| Country | Link |
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| CN (1) | CN207677488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
| CN109813437A (en) * | 2019-01-29 | 2019-05-28 | 武汉科瑞新电气自动化有限公司 | Passive and wireless infrared temperature measurement apparatus |
-
2018
- 2018-01-23 CN CN201820114059.7U patent/CN207677488U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054809A (en) * | 2018-01-23 | 2018-05-18 | 北京今日天鸿医疗器械制造有限公司 | Wireless charging circuit based on electronic tag |
| CN109813437A (en) * | 2019-01-29 | 2019-05-28 | 武汉科瑞新电气自动化有限公司 | Passive and wireless infrared temperature measurement apparatus |
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Address after: 102629 Room 201, 2nd Floor, 3rd Building, Tiangui Street, Daxing Biomedical Industry Base, Zhongguancun Science and Technology Park, Daxing District, Beijing Patentee after: BEIJING JINRI TIANHONG MEDICAL DEVICES MANUFACTUING CO., LTD. Address before: 102601 No. 2 Fuyu Road, Zhending Fuzhuang, Panggezhuang, Daxing District, Beijing Patentee before: BEIJING JINRI TIANHONG MEDICAL DEVICES MANUFACTUING CO., LTD. |