CN210691360U - SMD RFID card reading module - Google Patents

Abstract

The utility model discloses a SMD RFID card reading module, include: the interface unit and the card reading chip are respectively connected with the singlechip, the built-in antenna is connected with the card reading chip, and the interface unit is also respectively connected with the mainboard and the upper computer; the interface unit comprises a stamp hole connecting interface, a contact pin connecting interface and an FPC socket connecting interface. This module increases stamp hole paster and FPC winding displacement etc. and mainboard connection's interface on the basis of current module and mainboard connected mode, and compatible takes antenna and external antenna 2 kinds of modes certainly, and the module can directly paste on the mainboard, and convenient production has promoted and has produced the property ability, and the compatible multiple interface of module, and the suitability is stronger.

Description

SMD RFID card reading module

Technical Field

The utility model relates to a RFID radio frequency identification technology field, more specifically the utility model relates to a SMD RFID card reading module that says so.

Background

At present, with the development of the RFID radio frequency identification technology, the technology is increasingly applied to systems such as entrance guard attendance, archive management, electronic tickets, product anti-counterfeiting, public transportation all-purpose cards and the like, wherein the RFID module integrates basic functions such as RFID card reading and external communication interfaces and the like, has a small volume, is controlled by a self-contained CPU without a secondary user editing program, can easily operate an IC card only through a corresponding interface protocol and the like, and is often applied to the product systems as an embedded high-quality product.

However, there are two main types of RFID module products in the industry at present:

1. only the card reading function is integrated, the volume is small, the antenna needs to be externally connected and is assembled on the main board PCB in a pin header welding mode;

2. the card reading module with the integrated card reading function and the antenna is generally assembled on a main board PCB in a pin array welding mode or connected to the main board PCB by an FPC flexible flat cable.

It can be seen that the existing RFID module has the following problems:

1. the antenna module is not provided, and the antenna needs to be additionally designed, so that the design cost is increased.

2. The mode that the module is connected to the mainboard PCB by the FPC flexible flat cable: due to the arrangement of the FPC flexible flat cable, the design cost is increased, and in addition, the FPC flat cable is too long and is easily interfered by other signals, so that the card reading performance is influenced.

3. Mode that module is connected to mainboard PCB with row needle FPC: because of the row needle has the take the altitude, not suitable for in some limited high structural position that requires to the dress, the row needle is DIP plug-in components encapsulation in addition, and the dress can occupy top layer and two-layer wiring space in bottom on PCB, can occupy one deck space more than SMT paster encapsulation, and when PCB walked the line space limited, the DIP encapsulation can occupy the wiring space, increased the wiring degree of difficulty.

Therefore, how to provide an RFID card reading module which has strong applicability and is more convenient to connect with a main board is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a SMD RFID card reading module, this module increase stamp hole paster and FPC winding displacement etc. and mainboard connection's interface on the integrative module of contact pin formula card reading function and antenna, compatible from taking antenna and external antenna 2 kinds of modes, solved current RFID module compatibility poor, the wiring degree of difficulty and the encapsulation degree of difficulty big scheduling problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a patch type RFID card reading module comprises: the interface unit and the card reading chip are respectively connected with the singlechip, the built-in antenna is connected with the card reading chip, and the interface unit is also respectively connected with the mainboard and the upper computer;

the interface unit comprises a stamp hole connecting interface, a contact pin connecting interface and an FPC socket connecting interface.

Specifically, TTL, IIC, Wiegand and other communication interfaces of the upper computer and a power supply are connected with the whole RFID card reading module through a stamp hole connecting interface, a contact pin connecting interface or an FPC socket connecting interface in the interface unit.

Furthermore, the patch type RFID card reading module further comprises an external antenna, the external antenna is connected with the card reading chip, and the internal antenna and/or the external antenna are/is wirelessly connected with the IC card.

Specifically, the model of the singlechip is MT003C6PA or MT005C6 PA. The singlechip is mainly used for receiving the information of the IC card product decoded by the card reading chip, analyzing and processing the received data, and transmitting the processed data to an upper computer connected with the singlechip through a corresponding interface in the interface unit.

Specifically, the model of the card reading chip is ZRHF 600. The RFID card reading chip is in wireless communication with the IC card through an antenna (an internal antenna or an external antenna), when the IC card enters an antenna magnetic field, the RFID card reading chip receives a radio frequency signal sent by the 13.56MHz card reading chip, and product information stored in the IC card is sent to the card reading chip through energy obtained by induction current.

According to the technical scheme, compare with prior art, the utility model discloses a SMD RFID card reading module, this module increase stamp hole paster and FPC winding displacement etc. and mainboard connection's interface on the basis of current module and mainboard connected mode, and compatible 2 kinds of modes from antenna and external antenna of taking, the module can directly paste on the mainboard, and convenient production has promoted product property ability, and the compatible multiple interface of module, and the suitability is stronger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a chip RFID card reading module according to the present invention;

fig. 2 is a schematic diagram of an interface structure of an interface unit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal circuit of the patch type RFID card reading module according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a single chip microcomputer with the model of MT005C6PA in the embodiment of the present invention;

FIG. 5 is a schematic circuit diagram of a card reading chip according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of an internal antenna according to an embodiment of 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 a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the embodiment of the utility model discloses a SMD RFID card reading module, include: the system comprises an interface unit 1, a singlechip 2, a card reading chip 3 and a built-in antenna 4, wherein the interface unit 1 and the card reading chip 3 are respectively connected with the singlechip 2, the built-in antenna 4 is connected with the card reading chip 3, and the interface unit 1 is also respectively connected with a mainboard and an upper computer;

the interface unit 1 includes a postage stamp hole connection interface 11, a pin connection interface 12, and an FPC jack connection interface 13.

In some embodiments, the patch type RFID card reading module further includes an external antenna 5, the external antenna 5 is connected to the card reading chip 3, and the internal antenna 4 and/or the external antenna 5 are wirelessly connected to the IC card.

Specifically, the model of the singlechip 2 is MT003C6PA or MT005C6 PA. The singlechip 2 is mainly used for receiving the information of the IC card product decoded by the card reading chip 3, analyzing and processing the received data, and transmitting the processed data to an upper computer connected with the data through a corresponding interface in the interface unit 1.

Specifically, the card reading chip 3 has a model number ZRHF 600. The card reading chip 3 is in wireless communication with the IC card through an antenna (an internal antenna or an external antenna), when the IC card enters an antenna magnetic field, the card reading chip 3 receives a radio frequency signal sent by the card reading chip 3 of 13.56MHz, and the product information stored in the IC card is sent to the card reading chip 3 through the energy obtained by induction current.

Referring to fig. 3, a schematic diagram of an internal circuit principle of the chip RFID card reading module provided in this embodiment is shown, where 20 pins are shared by a single chip microcomputer U1 of MT005C6PA, pin 2 and pin 3 (i.e., TTL/IIC interfaces) are respectively connected to a power VCC through resistors R1 and R2, pin 4 is a reset pin and is connected to a reset circuit formed by a resistor R3 and a capacitor C1, pin 7 is grounded, pin 8 is grounded through a capacitor C4, pin 9 is grounded through two capacitors C2 and C3 connected in parallel and connected to a power VDD filter, pins 11 to 15 (i.e., SPI interfaces) are correspondingly connected to a card reading chip U2 of ZRHF600, pin 17 and pin 18 are connected to a programming interface of the single chip microcomputer, and pin 19 and pin 20 (i.e., wiegar interface) are connected to a stamp hole connection interface, a pin connection interface, and an FPC socket connection interface.

The card reading chip U2 with model ZRHF600 has 16 pins, pin 1 and pin 2 are respectively connected with pin 14 and pin 13 of the singlechip U1, pin 15 and pin 16 are respectively connected with pin 12 and pin 11 (namely SPI interface) of the singlechip U1, pin 3 is connected with inductor L2 and capacitor C6, and connected to a power supply DVDD filter, the pin 4 and the pin 6 are grounded, the pin 8 is connected with an inductor L3 and a capacitor C20, and connected to power supply TVDD filter, pin 10 is connected to inductor L5 and capacitor C21 and connected to power supply AVDD filter, pin 12 is connected to pin 11 through resistor R5 to provide reference voltage for receiving RX, and the pin 13 and the pin 14 are connected with a crystal oscillator circuit consisting of a crystal oscillator X1, a capacitor C14 and a capacitor C17, the pin 7(TX1), the pin 9(TX2) and the pin 12 are also connected with an antenna matching circuit, and the antenna matching circuit is connected with a built-in antenna for filtering reference voltage by grounding the capacitor C11.

Specifically, the antenna matching circuit comprises a first antenna matching circuit and a second antenna matching circuit, one end of the first antenna matching circuit is connected with the card reading chip U2, the other end of the first antenna matching circuit is respectively connected with the second antenna matching circuit and the external antenna, and the second antenna matching circuit is connected with the internal antenna.

Specifically, the first antenna matching circuit includes an inductor L1, an inductor L4, and capacitors C7, C8, C12, C13, and the receiving circuit includes resistors R7 and C19; the second antenna matching circuit includes capacitances C5, C9, C10, C15, C16, and C18, and resistances R4 and R6.

The steps of performing data reading and writing operations by using the patch type RFID card reading module disclosed in the above embodiment are specifically as follows:

1. a user selects a connection mode of the RFID card reading module and the mainboard as required, namely an interface (any one of 3 interfaces of a contact pin, a stamp hole patch and an FPC (flexible printed circuit)) is selected from the interface unit;

2. the TTL, IIC, Wiegand and other communication interfaces and the power supply of the terminal (upper computer) are connected with the whole RFID card reading module through a stamp hole connecting interface, a contact pin connecting interface or an FPC socket connecting interface;

and 3, the RFID card reading module is in wireless communication with the electronic tag through the antenna, receives a radio frequency signal sent by the 13.56MHZ card reading chip after the electronic tag (card) enters the magnetic field of the antenna, and sends product information stored in the chip to the card reading chip through energy obtained by induction current.

4. The card reading chip decodes the read IC card product information and sends the information to the MCU chip for related data processing, and the processed data is sent to a terminal (an upper computer) for processing through communication interfaces such as TTL, IIC, Wiegand and the like, so that reading or writing operation of the tag identification code and the memory data is realized.

To sum up, the embodiment of the utility model discloses a SMD RFID card reading module compares with prior art, has following advantage:

the RFID card reading module adopts a stamp hole patch mounting mode, and is more convenient to design and produce than a DIP or FPC mounting mode;

and 2, the RFID card reading module is compatible with a plurality of installation modes such as stamp holes, contact pins, FPC (flexible printed circuit) cables and the like and compatible with a built-in antenna mode and an external antenna mode, so that the RFID card reading module is suitable for various application occasions and is more flexible to use.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. The utility model provides a SMD RFID card reading module which characterized in that includes: the interface unit and the card reading chip are respectively connected with the singlechip, the built-in antenna is connected with the card reading chip, and the interface unit is also respectively connected with the mainboard and the upper computer;

the interface unit comprises a stamp hole connecting interface, a contact pin connecting interface and an FPC socket connecting interface.

2. The patch type RFID card reading module according to claim 1, further comprising an external antenna, wherein the external antenna is connected with the card reading chip, and the internal antenna and/or the external antenna is/are wirelessly connected with an IC card.

3. The patch type RFID card reading module according to claim 1 or 2, wherein the model of the single chip microcomputer is MT003C6PA or MT005C6 PA.

4. The patch type RFID card reading module according to claim 1 or 2, wherein the card reading chip is ZRHF 600.

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