CN214475098U - Fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission - Google Patents
Fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission Download PDFInfo
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- CN214475098U CN214475098U CN202120251245.7U CN202120251245U CN214475098U CN 214475098 U CN214475098 U CN 214475098U CN 202120251245 U CN202120251245 U CN 202120251245U CN 214475098 U CN214475098 U CN 214475098U
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Abstract
The utility model discloses a fingerprint magnetic card device based on wireless biography of electromagnetic resonance can, its technical scheme main points are: a fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission comprises an energy transmission module and a magnetic card shell; the energy transmission module is a cube type signal generator and comprises an energy transmission signal generation module, an energy transmission transmitting coil, a power supply and an information receiving coil; an energy transmission receiving coil is embedded in the magnetic card shell, a magnetic card receiving and fingerprint storage module, a fingerprint module and a magnetic card coil are arranged in the energy transmission receiving coil, and a power management module, a control module, a delay capacitor and a storage module are arranged in the magnetic card receiving and fingerprint storage module; the device is cheap, small and exquisite, and has high identification performance, and wireless energy transmission is adopted for power supply so as to better reduce the manufacturing cost of the magnetic card.
Description
Technical Field
The utility model relates to a wireless power supply technical field, in particular to fingerprint magnetic card device based on wireless biography of electromagnetic resonance can.
Background
The use of magnetic cards has a long history. Because the magnetic card has low cost, easy use, convenient management and certain safety characteristic, the development of the magnetic card is supported by a plurality of world famous companies, particularly government departments of various countries for decades, so that the application of the magnetic card is very popular and is distributed in the aspects of national life. The magnetic card can be used for calling, the magnetic card can be used for checking tickets in an airplane, the magnetic card can be used in the stock market, and the like.
The disadvantage is also apparent in comparison with the advantages of magnetic cards. Nowadays, magnetic cards are convenient for one person to use, store information and carry, but have the disadvantage of being lost, and once personal information and property are lost, the magnetic cards can be used by other people or earn other benefits. The phenomenon of card loss occurs every day, and the caused trouble and loss also appear in succession. A magnetic card is designed to identify personal information, so that the second magnetic card cannot be used when being picked up, and therefore, the problems of property loss and unnecessary dispute are avoided. For example, the identification and use of a telephone card, a meal card and a bus card can greatly reduce unnecessary property loss and protect capital loss; the identification and use of the identity card and the pass can reduce the leakage of personal information; the identification of the company or the sign-in certificate is used, one person can prevent the early return of the sign-in certificate from leading the enterprise to better manage, and the like.
In the existing recognition system, fingerprint recognition is mature and the personal recognition degree is very high, but the recognition systems of human faces, voices and the like have various degrees of defects. Face and speech recognition is not unique to various degrees, potential safety hazards are large, and property loss to different degrees can be caused by leakage of personal information. Therefore, the selection of the fingerprint module is more beneficial to the safety protection of the magnetic card, and the fingerprint module has the advantages of small size, low cost and portability.
SUMMERY OF THE UTILITY MODEL
To the problem of mentioning in the background art, the utility model aims at providing a fingerprint magnetic card device based on wireless biography of electromagnetic resonance can to solve the problem of mentioning in the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission comprises an energy transmission module and a magnetic card shell;
the energy transmission module is a cube type signal generator and comprises an energy transmission signal generation module, an energy transmission transmitting coil and a power supply, the energy transmission signal generation module is fixedly installed at the bottom of the energy transmission transmitting module, the energy transmission transmitting coil is fixedly arranged at the upper part of the energy transmission transmitting module, and an information receiving coil is fixedly installed inside the energy transmission transmitting coil;
the magnetic card energy transmission and storage device is characterized in that an energy transmission receiving coil is embedded in the magnetic card shell, a magnetic card receiving and fingerprint storage module is fixedly arranged on the inner side of the energy transmission receiving coil, a fingerprint module is arranged on one side of the magnetic card receiving and fingerprint storage module, a magnetic card coil is arranged in the middle of the magnetic card shell, a power supply management module, a control module, a delay capacitor and a storage module are arranged in the magnetic card receiving and fingerprint storage module, the power supply management module comprises a rectifier and a voltage stabilizer, and the control module comprises a single chip microcomputer and a diode.
By adopting the technical scheme, the energy transmission transmitting module is partially designed into a rectangular three-dimensional shape, and the internal energy transmission signal generating module sends out a high-frequency oscillation signal to be transmitted to the energy transmission transmitting coil. The magnetic card part is designed into a plastic shell with the thickness of 3mm, and the internal energy transmission receiving coil receives the current transmitted by the energy transmission transmitting coil to provide power for the magnetic card receiving and fingerprint storage module. When the device is electrified, the modulation frequency of the energy transmission signal generation module is f, the device enters an electromagnetic resonance electric energy transmission mode, and the frequency f is that the energy transmission transmitting coil enables the coil to reach the resonance frequency by configuring the size of the capacitance value C.
The energy transmission module adopts a power supply capable of simultaneously outputting 12V as a main energy source of the energy transmission signal generation module; the energy transfer signal generation module is formed by a high-frequency oscillation module and a high-frequency adjusting module and provides an adjustable high-frequency oscillation signal for the device; the energy transmission module consists of a power amplification module and a transmission module, so that the high-frequency oscillation signal is amplified and then transmitted to the energy transmission transmitting coil. The energy transmission coil can transmit the high-frequency magnetic field.
The power supply is as the main power supply source of this device, passes energy signal generation module and provides adjustable high frequency oscillation signal for this device, passes energy emission module and passes energy transmitting coil after high frequency oscillation signal enlargies, passes energy transmitting coil and turns into high frequency magnetic field energy transmission to the electric energy and goes out. The energy transmission receiving coil is connected with a load after receiving the current converted from the electromagnetism and passing through the micro processing module of the single chip microcomputer and the power management module, and the power management module supplies power to the single chip microcomputer through the rectifier module group.
After the fingerprint magnetic card contacts the energy transmission transmitting module, the energy transmission receiving coil receives and converts a space high-frequency alternating magnetic field into high-frequency current; the high-frequency current is converted into direct current through the power management module, so that the single chip microcomputer and a control load (a fingerprint module, a light-emitting diode and a time delay capacitor) provide power, and the light-emitting diode is adopted to display the successful verification when the fingerprint identification passes. In order to avoid the influence of double magnetic coils (energy transmission receiving coils and magnetic card coils), double-coil power-on interlocking is adopted as protection, and a capacitor is used for continuously providing subsequent power supply for the coils. When the fingerprint identification passes, the energy transmission receiving coil is disconnected, and meanwhile, the time delay capacitor discharges to continuously supply power for the fingerprint system for 1-3s, so that time is provided for the magnetic card coil to transmit information.
Preferably, the energy transmission transmitting coil is a copper enameled wire with the diameter of 2mm, the information energy transmission transmitting coil is wound in a planar spiral mode, the diameter of the energy transmission transmitting coil is 10mm, and the number of turns of the energy transmission transmitting coil is 4.
Through adopting above-mentioned technical scheme, pass and can launch coil and adopt copper enameled wire can make and can not communicate the connection between the coil, and the spiral coiling of plane can be convenient for transmit magnetic field energy.
Preferably, the information receiving coil and the energy transmission transmitting coil are installed in parallel, and the information receiving coil and the energy transmission transmitting coil are fixedly installed at an interval of 50 mm.
By adopting the technical scheme, the setting of the information receiving coil can realize the receiving of the magnetic card information, and the interval between the information receiving coil and the energy transmission transmitting coil is set, so that the interference between the coils can be reduced.
Preferably, the information receiving coil is a copper enameled wire with the diameter of 2mm, the information receiving coil is wound in a planar spiral mode, the diameter of the information receiving coil is 5cm, and the number of turns of the information receiving coil is 4.
By adopting the technical scheme, the information receiving coil adopts the copper enameled wire, so that the coils can not be connected in an intercommunicating manner, and the planar spiral winding can facilitate transmission of magnetic field energy.
Preferably, the power supply is a power supply capable of outputting 12V simultaneously, and the energy transmission signal generation module is composed of a high-frequency oscillation module and a high-frequency adjustment module.
By adopting the technical scheme, the power supply serves as a main energy source of the device, the energy transmission signal generation module provides adjustable high-frequency oscillation signals for the device, and the energy transmission transmitting coil is used for magnetic field transmission.
Preferably, the energy transmission receiving coil receives and converts a space high-frequency alternating magnetic field into high-frequency current, and the high-frequency current is converted into direct current through the power management module and is electrically connected with the single chip microcomputer and the fingerprint module.
Through adopting above-mentioned technical scheme to pass can receiving coil and be used for receiving the magnetic field, form the electric quantity supply, fingerprint module is used for gathering fingerprint information.
Preferably, the fingerprint module is an AS608 semiconductor sensor module, and the fingerprint module is electrically connected to the magnetic card coil.
By adopting the technical scheme, the AS608 semiconductor sensor module can collect fingerprints and transmit the fingerprints through the magnetic card coil.
To sum up, the utility model discloses mainly have following beneficial effect:
protecting personal property and personal information. The fingerprint magnetic card adopts fingerprint identification to lie in that the small and exquisite discernment nature of cheap is high, to face identification system and speech recognition system, fingerprint identification is more applicable to the assembly of fingerprint magnetic card and the convenience of action custom. Although the science and technology development is very fast, the use of magnetic card still is the daily life needs of people, adopts wireless biography can the power supply in order better to reduce the cost of magnetic card, also great solution the power problem of magnetic card simultaneously. Because the magnetic card is widely used and the market demand is large, the product has low manufacturing cost and can well provide better life guarantee for the public.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
fig. 2 is a perspective view of the energy transmission module of the present invention;
FIG. 3 is a cross-sectional view of the magnetic card receiver of the present invention;
fig. 4 is a transmission line of the present invention;
fig. 5 shows a receiving circuit according to the present invention.
Reference numerals: 1. an energy transmission module; 2. an energy transmission transmitting coil; 3. an information receiving coil; 4. An energy transmission signal generation module; 5. a magnetic card receiving and fingerprint storage module; 6. an energy transmitting and receiving coil; 7. A fingerprint module; 8. a magnetic card coil; 9. magnetic card shell.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-5, a fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission comprises an energy transmission module 1 and a magnetic card shell 9;
the energy transmission module 1 is a cube type signal generator, the energy transmission module 1 comprises an energy transmission signal generation module 4, an energy transmission transmitting coil 2 and a power supply, the energy transmission signal generation module 4 is fixedly arranged at the bottom of the energy transmission module 1, the energy transmission transmitting coil 2 is fixedly arranged at the upper part of the energy transmission transmitting module 1, and an information receiving coil 3 is fixedly arranged in the energy transmission transmitting coil 2;
inlay in the magnetic card shell 9 and have biography can receiving coil 6, it receives and fingerprint storage module 5 to pass the fixed magnetic card that is equipped with in can receiving coil 6 inboard, one side that magnetic card received and fingerprint storage module 5 is equipped with fingerprint module 7, the centre of magnetic card shell 9 is equipped with magnetic card coil 8, including power management module in magnetic card receipt and the fingerprint storage module 5, control module, time delay electric capacity and storage module, including rectification and steady voltage in the power management module, including singlechip and diode in the control module.
By adopting the technical scheme, the energy transmission transmitting module 1 is partially designed into a rectangular three-dimensional shape, and the internal energy transmission signal generating module 4 sends out a high-frequency oscillation signal to be transmitted to the energy transmission transmitting coil 2. The magnetic card part is designed into a plastic shell with the thickness of 3mm, and the internal energy transmission receiving coil 6 receives the current transmitted by the energy transmission transmitting coil 2 to provide power for the magnetic card receiving and fingerprint storage module 5. When the device is powered on, the energy transmission signal generation module 4 modulates the frequency f, the device enters an electromagnetic resonance electric energy transmission mode, and the frequency f is the frequency at which the energy transmission transmitting coil 2 achieves the resonance frequency by configuring the capacitance value C.
The energy transmission module 1 adopts a power supply capable of outputting 12V at the same time as a main energy source of the energy transmission signal generation module 4; the energy transfer signal generation module 4 is composed of a high-frequency oscillation module and a high-frequency adjusting module to provide an adjustable high-frequency oscillation signal; the energy transmission module 1 consists of a power amplification module and a transmission module, and enables the high-frequency oscillation signals to be transmitted to the energy transmission transmitting coil 2 after being amplified. The energy transmission coil 2 can transmit the high-frequency magnetic field.
The power supply is as the main power supply source of this device, passes energy signal generation module 4 and provides adjustable high frequency oscillation signal for this device, passes energy emission module 1 and passes energy transmitting coil 2 after high frequency oscillation signal enlargies, passes energy transmitting coil 2 and turns into high frequency magnetic field energy transmission to the electric energy. The energy transmission receiving coil 6 is connected with a load after receiving the electromagnetic converted current and passing through the micro processing module of the single chip microcomputer and the power management module, and the power management module supplies power to the single chip microcomputer through the rectifier module group.
After the fingerprint magnetic card contacts the energy transmission transmitting module 1, the energy transmission receiving coil 6 receives and converts a space high-frequency alternating magnetic field into high-frequency current; the high-frequency current is converted into direct current through the power management module, so that the singlechip, the load control fingerprint module 7, the light-emitting diode and the time delay capacitor provide power, and when the fingerprint identification passes, the light-emitting diode is adopted to display the verification success. In order to avoid the influence of the double-magnetic-coil energy transfer receiving coil 6 and the magnetic card coil 8, double-coil power-on interlocking is adopted as protection, and the capacitor is used for continuously providing subsequent power supply for the coils. When the fingerprint identification is passed, the energy transmission receiving coil 6 is disconnected, and meanwhile, the time delay capacitor discharges to continuously supply power for the fingerprint system for 1-3s, so that time is provided for the magnetic card coil 8 to transmit information.
Referring to fig. 1, the energy transmission transmitting coil 2 is a copper enameled wire with a diameter of 2mm, the information energy transmission transmitting coil 2 is wound in a planar spiral manner, the diameter of the energy transmission transmitting coil 2 is 10mm, and the number of turns is 4. The effect does, passes can transmitting coil 2 and adopts copper enameled wire can make can not intercommunicate the connection between the coil, and the spiral coiling of plane can be convenient for transmit magnetic field energy.
Referring to fig. 1, the information receiving coil 3 is installed in parallel with the energy transmission transmitting coil 2, and the information receiving coil 3 is fixedly installed at an interval of 50mm from the energy transmission transmitting coil 2. The effect is that the setting of the information receiving coil 3 can realize the receiving of the magnetic card information, and the interval setting between the information receiving coil 3 and the energy transmission transmitting coil 2 can reduce the interference between the coils.
Referring to fig. 2, the information receiving coil 3 is made of a copper enameled wire with a diameter of 2mm, the information receiving coil 3 is wound in a planar spiral manner, the diameter of the information receiving coil 3 is 5cm, and the number of turns of the information receiving coil is 4. The effect is that the information receiving coil 3 adopts the copper enameled wire to make the coils not intercommunicated and connected, and the spiral coiling of plane can be convenient for transmit the magnetic field energy.
Referring to fig. 1 and 2, the power supply is a power supply capable of outputting 12V simultaneously, the energy transmission signal generation module 4 is composed of a high-frequency oscillation module and a high-frequency adjustment module, and the energy transmission module 1 amplifies the high-frequency oscillation signal and converts the electric energy into magnetic field energy through the energy transmission coil 2 to be transmitted. The effect is that the power supply is used as the main energy source of the device, the energy transfer signal generation module 4 provides adjustable high-frequency oscillation signals for the device, and the energy transfer transmitting coil 2 is used for magnetic field transmission.
Referring to fig. 3, the energy transmission receiving coil 6 converts the space high-frequency alternating magnetic field reception into a high-frequency current, and the high-frequency current is converted into a direct current by the power management module to be used by the single chip microcomputer and the fingerprint module 7. The effect is that the energy transmission receiving coil 6 is used for receiving a magnetic field to form electric quantity supply, and the fingerprint module 7 is used for collecting fingerprint information.
Referring to fig. 3, the fingerprint module 7 is an AS608 semiconductor sensor module, and the magnetic card coil 8 is used for fingerprint identification and transmits information after being connected through a circuit. The effect is that the AS608 semiconductor sensor module can collect fingerprints and transmit the fingerprints through the magnetic card coil 8.
The recording head is composed of an annular iron core with a gap inside and a coil wound on the iron core. The magnetic fingerprint card is made up of a substrate made of a certain material and a magnetic microparticle material uniformly coated on the substrate. During recording, the magnetic surface of the magnetic fingerprint card or the magnetic recording head moves at a certain speed and contacts with the gap or the magnetic surface of the magnetic recording head. When the coil of the magnetic head is energized with current, a magnetic field proportional to the current is generated at the gap, and the magnetic body of the portion of the magnetic fingerprint card in contact with the gap is magnetized. If the recording signal current varies with time, the magnetic card or head is magnetized to different degrees with the variation of the current when the magnetic body on the magnetic fingerprint card passes through the gap because the magnetic card or head is moved. After the magnetic fingerprint card is magnetized, the magnetic layer of the card leaving the gap leaves residual magnetism corresponding to the current change.
If the current signal or the magnetic field intensity changes according to the sine law, the residual magnetic flux on the fingerprint magnetic card also changes according to the sine law. When the current is positive, a magnetic polarity from left to right from N to S is induced; when the current is reversed, the magnetic polarity is also reversed. The final result can be seen as one wavelength from N to S and back to N on the magnetic card, or as two magnetic rods with the same polarity. This is a somewhat simplified result, however, the remanence Br varies sinusoidally. When the signal current is maximum, the longitudinal magnetic flux density also reaches a maximum. The recording signal is recorded in the form of a sinusoidally varying remanence and stored on the magnetic card.
The electromagnetic resonance wireless energy transmission fingerprint magnetic card can achieve the function of personal information identification and authentication, and the wireless energy transmission provides power for the card, reduces the cost, improves the portability and provides certain protection for personal property and personal information. Provides necessary help for the daily life of people.
The use principle and the advantages are as follows:
the energy transmission module 1 is designed to be rectangular and three-dimensional, and the internal energy transmission signal generation module 4 sends out a high-frequency oscillation signal to be transmitted to the energy transmission transmitting coil 2. The magnetic card part is designed into a plastic shell with the thickness of 3mm, and the internal energy transmission receiving coil 6 receives the current transmitted by the energy transmission transmitting coil 2 to provide power for the magnetic card receiving and fingerprint storage module 5. When the device is powered on, the energy transmission signal generation module 4 modulates the frequency f, the device enters an electromagnetic resonance electric energy transmission mode, and the frequency f is the frequency at which the energy transmission transmitting coil 2 achieves the resonance frequency by configuring the capacitance value C.
The energy transmission module 1 adopts a power supply capable of outputting 12V at the same time as a main energy source of the energy transmission signal generation module 4; the energy transfer signal generation module 4 is composed of a high-frequency oscillation module and a high-frequency adjusting module to provide an adjustable high-frequency oscillation signal; the energy transmission module 1 consists of a power amplification module and a transmission module, and enables the high-frequency oscillation signals to be transmitted to the energy transmission transmitting coil 2 after being amplified. The energy transmission coil 2 can transmit the high-frequency magnetic field.
The power supply is as the main power supply source of this device, passes energy signal generation module 4 and provides adjustable high frequency oscillation signal for this device, passes energy emission module 1 and passes energy transmitting coil 2 after high frequency oscillation signal enlargies, passes energy transmitting coil 2 and turns into high frequency magnetic field energy transmission to the electric energy. The energy transmission receiving coil 6 is connected with a load after receiving the electromagnetic converted current and passing through the micro processing module of the single chip microcomputer and the power management module, and the power management module supplies power to the single chip microcomputer through the rectifier module group.
After the fingerprint magnetic card contacts the energy transmission transmitting module 1, the energy transmission receiving coil 6 receives and converts a space high-frequency alternating magnetic field into high-frequency current; the high-frequency current is converted into direct current through the power management module, so that the singlechip, the load control fingerprint module 7, the light-emitting diode and the time delay capacitor provide power, and when the fingerprint identification passes, the light-emitting diode is adopted to display the verification success. In order to avoid the influence of the double-magnetic-coil energy transfer receiving coil 6 and the magnetic card coil 8, double-coil power-on interlocking is adopted as protection, and the capacitor is used for continuously providing subsequent power supply for the coils. When the fingerprint identification is passed, the energy transmission receiving coil 6 is disconnected, and meanwhile, the time delay capacitor discharges to continuously supply power for the fingerprint system for 1-3s, so that time is provided for the magnetic card coil 8 to transmit information.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a fingerprint magnetic card device based on wireless biography energy of electromagnetic resonance which characterized in that: comprises an energy transmission module (1) and a magnetic card shell (9);
the energy transmission transmitting module (1) is a cube type signal generator, the energy transmission transmitting module (1) comprises an energy transmission signal generating module (4), an energy transmission transmitting coil (2) and a power supply, the energy transmission signal generating module (4) is fixedly installed at the bottom of the energy transmission transmitting module (1), the energy transmission transmitting coil (2) is fixedly arranged at the upper part of the energy transmission transmitting module (1), and an information receiving coil (3) is fixedly installed inside the energy transmission transmitting coil (2);
inlay in magnetic card shell (9) and have biography can receiving coil (6), it can receiving coil (6) inboard fixed magnetic card that is equipped with to pass receives and fingerprint storage module (5), one side that magnetic card received and fingerprint storage module (5) is equipped with fingerprint module (7), the centre of magnetic card shell (9) is equipped with magnetic card coil (8), including power management module, control module, time delay electric capacity and storage module in magnetic card receipt and fingerprint storage module (5), including rectification and steady voltage in the power management module, including singlechip and diode in the control module.
2. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 1, characterized in that: the energy transmission transmitting coil (2) is a copper enameled wire with the diameter of 2mm, the energy transmission transmitting coil (2) is wound spirally on the plane, the diameter of the energy transmission transmitting coil (2) is 10mm, and the number of turns is 4.
3. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 2, characterized in that: the information receiving coil (3) and the energy transmission transmitting coil (2) are installed in parallel, and the information receiving coil (3) and the energy transmission transmitting coil (2) are fixedly installed at an interval of 50 mm.
4. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 1, characterized in that: the information receiving coil (3) is a copper enameled wire with the diameter of 2mm, the information receiving coil (3) is wound in a planar spiral mode, the diameter of the information receiving coil (3) is 5cm, and the number of turns is 4.
5. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 1, characterized in that: the power supply adopts a power supply capable of outputting 12V simultaneously, and the energy transfer signal generation module (4) consists of a high-frequency oscillation module and a high-frequency adjusting module.
6. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 1, characterized in that: the energy transfer receiving coil (6) receives and converts a space high-frequency alternating magnetic field into high-frequency current, and the high-frequency current is converted into direct current through the power management module and is electrically connected with the single chip microcomputer and the fingerprint module (7).
7. The magnetic fingerprint card device based on electromagnetic resonance wireless energy transmission of claim 6, wherein: the fingerprint module (7) is an AS608 semiconductor sensor module, and the fingerprint module (7) is electrically connected with the magnetic card coil (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120251245.7U CN214475098U (en) | 2021-01-29 | 2021-01-29 | Fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120251245.7U CN214475098U (en) | 2021-01-29 | 2021-01-29 | Fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214475098U true CN214475098U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120251245.7U Expired - Fee Related CN214475098U (en) | 2021-01-29 | 2021-01-29 | Fingerprint magnetic card device based on electromagnetic resonance wireless energy transmission |
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| Country | Link |
|---|---|
| CN (1) | CN214475098U (en) |
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2021
- 2021-01-29 CN CN202120251245.7U patent/CN214475098U/en not_active Expired - Fee Related
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Granted publication date: 20211022 |