CN217360799U

CN217360799U - Passive RFID control circuit and device

Info

Publication number: CN217360799U
Application number: CN202220847032.5U
Authority: CN
Inventors: 陈根炎; 陈金荣; 胡成
Original assignee: Shenzhen Skyline Internet Of Things Co ltd
Current assignee: Shenzhen Skyline Internet Of Things Co ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-09-02
Anticipated expiration: 2032-04-13

Abstract

The utility model discloses a passive RFID control circuit and device, the circuit includes the RFID chip, and induction coil, controller, a plurality of LED lamps and sound production device, RFID chip, a plurality of LED lamps, sound production device all are connected with the controller, induction coil turns into the electric energy with the energy in the radio frequency magnetic field of receiving and gives the power supply of RFID chip, a plurality of LED lamps are according to the luminous order of signal control of controller, sound production device is according to the signal broadcast sound information of controller, the utility model discloses need not external power supply, the controller is according to order and the number of demand control LED lamp bright lamp to control speaker sound. The LED lamp gives out light to remind deaf-mute people to pay a card conveniently, and the buzzer sounds to remind the blind people to pay a card conveniently.

Description

Passive RFID control circuit and device

Technical Field

The utility model relates to a card reader technical field, concretely relates to passive RFID control circuit and device.

Background

With the development of sharing economy, the popularization of intelligent hardware and the application of RFID technology, more and more intelligent hardware products are developed to thousands of households. With the increasing of residential houses, the property management of residential areas becomes increasingly important, and the management methods of visitor registration and duty door watching are not suitable for the requirements of modern management on rapidness, convenience and safety.

RFID is an english abbreviation for radio frequency identification. In popular terms, an RFID card reader is an automatic identification device capable of reading electronic tag data. The RFID radio frequency is a non-contact automatic identification technology, which automatically identifies a target object through a radio frequency signal and exchanges data with the data in the target object; in the field of identification, a non-contact IC card technology with the characteristics of high capacity, high security, high noise immunity, fast operation and the like has been emphasized by people. The existing RFID light emitting card can control the light emitting sequence of a plurality of LED lamps, but lacks a sound generating device, cannot remind by sound, and cannot be suitable for deaf and dumb people and blind people to pay in and out card swiping reminding.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a not only can control luminous order but also can carry out passive RFID control circuit and device that sound was reminded.

The embodiment of the utility model provides a passive RFID control circuit, the circuit includes the RFID chip, and induction coil, the controller, a plurality of LED lamps and sound production device, RFID chip, a plurality of LED lamps, sound production device all are connected with the controller, induction coil turns into the electric energy with the energy in the radio frequency magnetic field of receiving and gives the RFID chip power supply, a plurality of LED lamps are according to the luminous order of signal control of controller, sound production device is according to the signal broadcast sound information of controller.

Optionally, the circuit further includes a bidirectional diode, the bidirectional diode includes a first diode and a second diode, the first end of the RFID chip is connected to the anode of the first diode and the cathode of the second diode, and the cathode of the first diode and the anode of the second diode are respectively connected to the cathode of the first light emitting diode and the VDD terminal of the controller through a resistor R1.

Optionally, the circuit further comprises a capacitor C9, wherein a first end of the capacitor C9 is connected to the controller, and a second end is connected to the sound-producing device.

Optionally, the circuit further includes a capacitor C1 and a capacitor C2, a first end of the capacitor C1 is connected to the second end of the resistor R1, a second end of the capacitor C1 is grounded, first ends of the capacitors C2 are respectively connected to the second end of the resistor R1 and the VDD terminal of the controller, and a second end of the capacitor C2 is grounded.

Optionally, the circuit further comprises a capacitor C4, a first terminal of the capacitor C4 is connected to a first terminal of the RFID chip, and a second terminal of the capacitor C4 is connected to an anode of the first diode and a cathode of the second diode.

Optionally, the circuit further includes a capacitor C5 and a capacitor C6, first ends of the capacitor C5 and the capacitor C6 are respectively connected to a first end of the RFID chip and a first end of the capacitor C4, and second ends of the capacitor C5 and the capacitor C6 are respectively connected to a second end of the RFID chip.

Optionally, the circuit further comprises a capacitor C11, a first terminal of the capacitor C11 is connected to the cathode of the first diode, and a second terminal of the capacitor C11 is connected to the anode of the second diode.

Optionally, the sound producing device is a buzzer.

Optionally, the plurality of LED lights emit light of at least two colors.

The utility model also provides a passive RFID controlling means, including above-mentioned arbitrary passive RFID control circuit.

The embodiment of the utility model provides an among the technical scheme, energy conversion in the radio frequency magnetic field that induction coil will receive gives the power supply for the RFID chip, and a plurality of LED lamps are according to the luminous order of signal control of controller, and sound production device is according to the signal broadcast sound information of controller, the utility model discloses need not the outside power supply, the controller is according to order and the number of demand control LED lamp bright lamp to control the speaker and make a sound. The LED lamp gives out light to remind deaf and dumb people to conveniently swipe cards, and the buzzer gives out sound to remind the blind people to swipe cards conveniently.

Drawings

Fig. 1 is a schematic structural diagram of the passive RFID control circuit of the present invention;

fig. 2 is a schematic circuit diagram of a part of the passive RFID control circuit according to the present invention;

fig. 3 is a schematic circuit diagram of a part of the controller of the passive RFID control circuit according to the present invention.

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 those skilled in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1, the utility model provides a passive RFID control circuit, the circuit includes the RFID chip, and induction coil, the controller, a plurality of LED lamps and sound production device, RFID chip, a plurality of LED lamps, sound production device all are connected with the controller, induction coil turns into the electric energy with the energy in the radio frequency magnetic field of receiving and supplies power for the RFID chip, a plurality of LED lamps are according to the luminous order of a plurality of LED lamps of signal control of controller, sound production device is according to the signal broadcast sound information of controller.

The utility model discloses in induction coil L when the label is in radio frequency magnetic field, induction coil L received the energy transformation in the magnetic field and gives the power supply of RFID chip for the electric energy, need not the external power supply, and the controller is according to order and the number that the demand control LED lamp was lighted to control the speaker and make a sound. The LED lamp gives out light to remind deaf and dumb people to conveniently swipe cards, and the buzzer gives out sound to remind the blind people to swipe cards conveniently.

Referring to fig. 2 and 3, the circuit of the present invention further includes a bidirectional diode, the bidirectional diode includes a first diode and a second diode, the first end of the RFID chip is connected to the anode of the first diode and the cathode of the second diode, the cathode of the first diode and the anode of the second diode are respectively connected to the cathode of the first light emitting diode and the VDD terminal of the controller U1 through a resistor R1, and the first diode and the second diode are BAV 99T.

In one embodiment of the present invention, please refer to fig. 3, the circuit further includes a capacitor C9, the first end of the capacitor C9 is connected to the controller U1, the second end of the capacitor C9 is connected to the first end of the sound generating device R2, the second end of the sound generating device R2 is grounded, and the sound generating device R2 is a buzzer. The utility model discloses in, controller U1 is FM33LC023U/N chip.

In one embodiment of the present invention, the circuit further includes a capacitor C1 and a capacitor C2, the first end of the capacitor C1 is connected to the second end of the resistor R1, the second end of the capacitor C1 is grounded, the first end of the capacitor C2 is connected to the second end of the resistor R1 and the VDD terminal of the controller U1, and the second end of the capacitor C2 is grounded.

In one embodiment of the present invention, the circuit further includes a capacitor C4, the first end of the capacitor C4 is connected to the first end of the RFID chip, the second end of the capacitor C4 is connected to the anode of the first diode and the cathode of the second diode, and the anode of the second diode is grounded.

In one embodiment of the present invention, the circuit further includes a capacitor C5 and a capacitor C6, the first ends of the capacitor C5 and the capacitor C6 are respectively connected to the first end of the RFID chip and the first end of the capacitor C4, the second ends of the capacitor C5 and the capacitor C6 are respectively connected to the second end of the RFID chip, and the second end of the capacitor C5 is grounded.

In one embodiment of the present invention, the circuit further includes a capacitor C11, the first terminal of the capacitor C11 is connected to the cathode of the first diode, and the second terminal of the capacitor C11 is connected to the anode of the second diode.

In one embodiment of the present invention, the plurality of LED lamps at least include a first LED lamp group and a second LED lamp group, each of the LED lamp groups includes a plurality of LED lamps, the first LED lamp group emits light of a first color, the second LED lamp group emits light of a second color, and the first color is different from the second color.

The principle of the utility model is as follows:

a passive electronic tag may be a tag that stores information about an item to which it is attached to identify a target object. The coupling element realizes the space non-contact coupling of radio frequency signals with the reader, and the energy transfer and data exchange are realized in the coupling channel according to the time sequence relation. When the induction coil L of the RFID tag is in a radio frequency magnetic field, the induction coil L receives energy in the magnetic field and converts the energy into electric energy, the current direction passes through the chip of the controller U1, and the lighting sequence of the LED lamp is controlled by the chip U1. Specifically, when the induction coil L of the RFID tag is in the radio frequency magnetic field, the energy received by the induction coil L in the magnetic field is converted into electric energy, and the current flows through the capacitor C4, the diode D3 and the resistor R1 from the VDD interface of the controller U1 chip to the controller U1 chip, flows out to the ground from the VSS interface of the controller U1 chip, and then flows through the diode D1 to the VDD interface of the controller U1 chip to the controller U1 chip.

After entering a chip of the controller U1, current flows out from a C0 interface, passes through the LED lamp D2, enters a chip of the controller U1 from L0, is a circuit cycle of the LED lamp, and the rest of the LED lamps are analogized in turn, for example, the LED lamp D4, flows out from a C0 interface, passes through the LED lamp D4, and enters a chip of the controller U1 from an L1 interface.

The utility model discloses can realize traditional label reading and writing and have the function that the luminous and buzzer of control LED lamp were sounded in limited space, and can keep the high bright state of LED lamp. The LED card can control the lighting sequence of the LED lamps according to the requirements of customers to form required patterns, and is suitable for deaf-mute people and blind people to go in and out for card swiping reminding. The utility model discloses a passive RFID control circuit can use in the RFID field, and in the authentication who keeps RFID, conventional application such as logistics management can also use at luminous bank card, luminous attendance card, luminous NFC labeling, luminous toy, fields such as luminous swift payment card.

The utility model also provides a passive RFID controlling means, including above-mentioned each embodiment passive RFID control circuit.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The passive RFID control circuit is characterized by comprising an RFID chip, an induction coil, a controller, a plurality of LED lamps and a sounding device, wherein the RFID chip, the LED lamps and the sounding device are all connected with the controller, the induction coil converts energy in a received radio frequency magnetic field into electric energy to supply power to the RFID chip, the LED lamps control a light emitting sequence according to signals of the controller, and the sounding device plays sound information according to the signals of the controller.

2. The passive RFID control circuit of claim 1, further comprising a bidirectional diode comprising a first diode and a second diode, the first end of the RFID chip coupled to an anode of the first diode and a cathode of the second diode, the cathode of the first diode and the anode of the second diode coupled to the cathode of the first light emitting diode and the VDD terminal of the controller, respectively, through a resistor R1.

3. The passive RFID control circuit of claim 1, further comprising a capacitor C9, wherein the capacitor C9 is connected to the controller at a first end and to the sound producing device at a second end.

4. The passive RFID control circuit of claim 1, further comprising a capacitor C1 and a capacitor C2, wherein a first terminal of the capacitor C1 is connected to a second terminal of the resistor R1, a second terminal of the capacitor C1 is connected to ground, a first terminal of the capacitor C2 is connected to a second terminal of the resistor R1 and a VDD terminal of the controller, respectively, and a second terminal of the capacitor C2 is connected to ground.

5. The passive RFID control circuit of claim 2, further comprising a capacitor C4, a first terminal of the capacitor C4 being connected to a first terminal of the RFID chip, a second terminal of the capacitor C4 being connected to an anode of the first diode and a cathode of the second diode.

6. The passive RFID control circuit of claim 5, further comprising a capacitor C5 and a capacitor C6, wherein first ends of the capacitor C5 and the capacitor C6 are respectively connected to a first end of the RFID chip and a first end of the capacitor C4, and second ends of the capacitor C5 and the capacitor C6 are respectively connected to a second end of the RFID chip.

7. The passive RFID control circuit of claim 6, further comprising a capacitor C11, wherein a first terminal of the capacitor C11 is connected to a cathode of a first diode and a second terminal of the capacitor C11 is connected to an anode of a second diode.

8. The passive RFID control circuit of claim 1, wherein the sound producing device is a buzzer.

9. The passive RFID control circuit of claim 1, wherein the plurality of LED lights emit light of at least two colors.

10. A passive RFID control device comprising the passive RFID control circuit of any of claims 1-9.