A 2.4G RFID radio frequency tag positioning reader

Abstract

The utility model relates to a 2.4G RFID radio frequency label positioning read-write ware, including wireless card reading and transmitting module and USB conversion serial port chip and power supply circuit, wherein, USB conversion serial port chip is connected with wireless card reading and transmitting module, TYPE C interface is connected with USB conversion serial port chip, TYPE C interface is connected with the computer USB interface outside communication, power supply circuit provides power supply for wireless card reading and transmitting module and USB conversion serial port chip and TYPE C interface respectively when using, wireless card reading and transmitting module and active RFID label wireless connection communication and ranging, USB conversion serial port chip carries out USB and serial port protocol mutual conversion, TYPE C interface and the computer USB interface outside communication are connected, thereby realize using computer connection this 2.4G RFID radio frequency label positioning read-write ware to active RFID label ranging positioning and communication / data transmission after, and circuit is simple, cost is low, small, convenient to use, wide applicability, high degree of intellectualization.

Description

Technical Field

[0001] This utility model relates to the field of active radio frequency tag readers, and more specifically, to a 2.4G RFID radio frequency tag positioning reader. Background Technology

[0002] With the development of the Internet of Things (IoT), RFID (Radio Frequency Identification) technology has been widely used for automatic identification and information tracking. Existing low-frequency (125kHz) and high-frequency (13.56MHz) RFID systems have limitations in identification distance and anti-interference capabilities, and are particularly unsuitable for real-time positioning of dynamic targets. In contrast, the 2.4GHz band offers advantages such as high transmission speed, long identification distance, and high positioning accuracy, and is attracting increasing attention.

[0003] However, most existing 2.4G RFID positioning readers suffer from complex circuitry and low integration, failing to balance convenience, positioning accuracy, and anti-interference capabilities. Therefore, there is an urgent need for a 2.4G RFID radio frequency tag positioning reader with high integration, strong positioning functionality, and ease of installation and deployment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a 2.4G RFID radio frequency tag positioning reader that is simple in circuit, low in cost, small in size, easy to use, and widely applicable, in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A 2.4G RFID tag positioning reader / writer is constructed, comprising a wireless card reader pass-through module, a USB-to-serial chip, and a power supply circuit. The USB-to-serial chip is connected to the wireless card reader pass-through module, and a Type-C interface is also connected to the USB-to-serial chip. The Type-C interface is connected to an external computer's USB port for communication. The power supply circuit is connected to the wireless card reader pass-through module, the USB-to-serial chip, and the Type-C interface to provide power.

[0007] The wireless card reader transparent transmission module communicates and measures distances wirelessly with external active RFID tags, and the USB to serial port chip performs USB and serial port protocol conversion.

[0008] The 2.4G RFID radio frequency tag positioning reader of this utility model includes a first resistor connected to the TXD terminal of the wireless card reader transparent transmission module, the other end of the first resistor connected to the RXD terminal of the USB to serial port chip, a second resistor connected to the RXD terminal of the wireless card reader transparent transmission module, the other end of the second resistor connected to the positive terminal of a first diode and a third resistor, the negative terminal of the first diode connected to the TXD terminal of the USB to serial port chip, and the other end of the third resistor connected to the 3.3V positive output terminal.

[0009] The USB to serial port chip has a fourth resistor connected to its D- terminal and a fifth resistor connected to its D+ terminal. The other end of the fourth resistor is connected to the D- terminal of the TYPE-C interface, and the other end of the fifth resistor is connected to the D+ terminal of the TYPE-C interface.

[0010] The VCC terminal of the USB to serial port chip is connected to the positive output terminal of the 5V power supply, and the GND terminal is grounded. The DTR# terminal of the USB to serial port chip is connected to a sixth resistor, and the other end of the sixth resistor is grounded.

[0011] The 2.4G RFID radio frequency tag positioning reader of this utility model has the D- terminal of the TYPE-C interface connected to the I / O2 terminal of the electrostatic protection diode and the D+ terminal connected to the I / O1 terminal of the electrostatic protection diode. The GND terminal of the electrostatic protection diode is grounded and the VCC terminal is connected to the positive output terminal of the 5V power supply.

[0012] The VBUS terminal of the TYPE-C interface is connected to the positive terminal of the second diode, and the negative terminal of the second diode is connected to a fuse. The other end of the fuse is the positive output terminal of the 5V power supply, and the GND terminal of the TYPE-C interface is grounded.

[0013] The 2.4G RFID radio frequency tag positioning reader of this utility model includes a power supply circuit comprising a power chip, wherein the VIN terminal of the power chip is connected to the positive output terminal of the 5V power supply and the GND terminal is grounded.

[0014] The VOUT1 terminal of the power chip is connected to the VOUT2 terminal and is also connected to the 3.3V positive output terminal. The VOUT1 terminal of the power chip is also connected to a seventh resistor. The other end of the seventh resistor is connected to the positive terminal of the light-emitting diode, and the negative terminal of the light-emitting diode is grounded.

[0015] The power chip has a first capacitor connected in parallel between its VIN terminal and GND terminal, and a second capacitor connected in parallel between its VOUT1 terminal and GND terminal.

[0016] The 2.4G RFID radio frequency tag positioning reader of this utility model contains a power chip of model AMS1117-3.3V.

[0017] The 2.4G RFID radio frequency tag positioning reader of this utility model contains a USB to serial port chip of model CH340C.

[0018] The 2.4G RFID radio frequency tag positioning reader of this utility model includes a wireless card reading pass-through module, which is an active 2.4G RFID card reading pass-through module, specifically model MO3N.

[0019] The 2.4G RFID radio frequency tag positioning reader of this utility model, wherein the active RFID tag is an active 2.4G RFID tag, and the active 2.4G RFID tag model is M05N.

[0020] The beneficial effects of this utility model are as follows: during use, the power supply circuit provides power to the wireless card reader pass-through module, the USB to serial chip, and the TYPE-C interface; the wireless card reader pass-through module wirelessly connects to external active RFID tags for communication and ranging, the USB to serial chip performs USB and serial protocol conversion, and the TYPE-C interface connects to the external computer's USB interface for communication; thus, after connecting the 2.4G RFID radio frequency tag positioning reader to a computer, it can perform ranging, positioning, communication / data pass-through of active RFID tags, and the circuit is simple, low-cost, small in size, easy to use, widely applicable, and highly intelligent. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a circuit diagram of the wireless transparent transmission card reading module of the 2.4G RFID radio frequency tag positioning reader, which is a preferred embodiment of this utility model.

[0023] Figure 2 This is a circuit diagram of the USB-to-serial chip of the 2.4G RFID radio frequency tag positioning reader / writer, which is a preferred embodiment of this utility model.

[0024] Figure 3This is a circuit diagram of the TYPE-C interface of a 2.4G RFID radio frequency tag positioning reader / writer according to a preferred embodiment of the present invention.

[0025] Figure 4 This is a circuit diagram of the power supply circuit of the 2.4G RFID radio frequency tag positioning reader, which is a preferred embodiment of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] The preferred embodiment of this utility model is a 2.4G RFID radio frequency tag positioning reader, such as... Figure 1 As shown, see also Figures 2 to 4 The system includes a wireless card reader pass-through module U301, a USB-to-serial chip U300, and a power supply circuit 100. The USB-to-serial chip U300 is connected to the wireless card reader pass-through module U301, and a TYPE-C interface TYPE-C1 is also connected to the USB-to-serial chip U300 for communication with an external computer's USB port. The power supply circuit 100 is connected to the wireless card reader pass-through module U301, the USB-to-serial chip U300, and the TYPE-C interface TYPE-C1 to provide power. The use of the TYPE-C interface TYPE-C1 improves ease of use.

[0028] The wireless card reader pass-through module U301 wirelessly connects to external active RFID tags for communication and ranging, while the USB to serial port chip U300 performs USB and serial port protocol conversion.

[0029] In use, the power supply circuit 100 provides power to the wireless card reader pass-through module U301, the USB to serial chip U300, and the TYPE-C interface TYPE-C1. The wireless card reader pass-through module U301 wirelessly connects to external active RFID tags for communication and ranging. The USB to serial chip U300 converts between USB and serial protocols. The TYPE-C interface TYPE-C1 connects to the USB interface of an external computer for communication. Thus, the 2.4G RFID radio frequency tag positioning reader can be connected to a computer to perform ranging, positioning, communication / data pass-through of active RFID tags. The circuit is simple, low-cost, small in size, easy to use, widely applicable, and highly intelligent.

[0030] To improve the positioning accuracy of active RFID tags, at least three of these 2.4G RFID radio frequency tag positioning readers can be used to triangulate the active RFID tags.

[0031] like Figure 1 and Figure 2 As shown, the TXD terminal of the wireless card reader pass-through module U301 is connected to a first resistor R103. The other end of the first resistor R103 is connected to the RXD terminal of the USB to serial port chip U300. The RXD terminal of the wireless card reader pass-through module U301 is connected to a second resistor R102. The other end of the second resistor R102 is connected to the positive terminal of the first diode D302 and the third resistor R101. The negative terminal of the first diode D302 is connected to the TXD terminal of the USB to serial port chip U300. The other end of the third resistor R101 is connected to the 3.3V positive output terminal. The first resistor R103 and the second resistor R102 are used for current limiting. The first diode D302 and the third resistor R101 work together with the TXD terminal of the USB to serial port chip U300. The first diode D302 is also used for voltage clamping.

[0032] The USB-to-serial chip U300 has a fourth resistor R306 connected to its D- terminal and a fifth resistor R307 connected to its D+ terminal. The other end of the fourth resistor R306 is connected to the D- terminal of the TYPE-C interface TYPE-C1, and the other end of the fifth resistor R307 is connected to the D+ terminal of the TYPE-C interface TYPE-C1; this is used for current limiting.

[0033] The VCC terminal of the USB-to-serial chip U300 is connected to the positive output terminal of the 5V power supply, and the GND terminal is grounded. The DTR# terminal of the USB-to-serial chip U300 is connected to the sixth resistor R318, and the other end of the sixth resistor R318 is grounded; this meets the working requirements of the USB-to-serial chip U300.

[0034] like Figure 2 and Figure 3 As shown, the D- terminal of the TYPE-C1 interface is connected to the I / O2 terminal of the electrostatic discharge protection diode IC300, and the D+ terminal is connected to the I / O1 terminal of the electrostatic discharge protection diode IC300. The GND terminal of the electrostatic discharge protection diode IC300 is grounded, and the VCC terminal is connected to the positive output terminal of the 5V power supply; this provides electrostatic discharge protection.

[0035] The VBUS terminal of the TYPE-C1 interface is connected to the positive terminal of the second diode D301. The negative terminal of the second diode D301 is connected to the fuse F300. The other end of the fuse F300 is the positive output terminal of the 5V power supply. The GND terminal of the TYPE-C1 interface is grounded for overcurrent protection.

[0036] like Figures 1 to 4 As shown, the power supply circuit 100 includes a power supply chip U202. The VIN terminal of the power supply chip U202 is connected to the positive output terminal of the 5V power supply, and the GND terminal is grounded.

[0037] The VOUT1 and VOUT2 terminals of the power chip U202 are connected and are connected as 3.3V positive output terminals. The VOUT1 terminal of the power chip U202 is also connected to the seventh resistor R211. The other end of the seventh resistor R211 is connected to the positive terminal of the LED D207. The negative terminal of the LED D207 is grounded and used for power indication.

[0038] A first capacitor EC205 is connected in parallel between the VIN terminal and the GND terminal of the power chip U202, and a second capacitor EC204 is connected in parallel between the VOUT1 terminal and the GND terminal; this is used for filtering.

[0039] like Figure 4 As shown, the power chip U202 is model AMS1117-3.3V; it has high stability and small size.

[0040] like Figure 3 As shown, the USB to serial port chip U300 is model CH340C; it is small in size.

[0041] like Figure 1 As shown, the wireless card reader pass-through module U301 is an active 2.4G RFID card reader pass-through module, model MO3N; it features high stability, low cost, and small size.

[0042] Furthermore, the active RFID tag is an active 2.4G RFID tag, model M05N; it features high stability, low cost, and small size.

[0043] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A 2.4G RFID radio frequency tag positioning reader / writer, comprising a wireless card reader pass-through module, a USB to serial port chip, and a power supply circuit; characterized in that, The USB-to-serial chip is connected to the wireless card reader pass-through module, the TYPE-C interface is connected to the USB-to-serial chip, and the TYPE-C interface is connected to the external computer's USB interface for communication; the power supply circuit is connected to the wireless card reader pass-through module, the USB-to-serial chip, and the TYPE-C interface respectively to provide power supply. The wireless card reader transparent transmission module communicates and measures distances wirelessly with external active RFID tags, and the USB to serial port chip performs USB and serial port protocol conversion.

2. The 2.4G RFID radio frequency tag positioning reader / writer according to claim 1, characterized in that, The TXD terminal of the wireless card reader pass-through module is connected to a first resistor, and the other end of the first resistor is connected to the RXD terminal of the USB to serial port chip. The RXD terminal of the wireless card reader pass-through module is connected to a second resistor, and the other end of the second resistor is connected to the positive terminal of a first diode and a third resistor. The negative terminal of the first diode is connected to the TXD terminal of the USB to serial port chip, and the other end of the third resistor is connected to the 3.3V positive output terminal. The USB to serial port chip has a fourth resistor connected to its D- terminal and a fifth resistor connected to its D+ terminal. The other end of the fourth resistor is connected to the D- terminal of the TYPE-C interface, and the other end of the fifth resistor is connected to the D+ terminal of the TYPE-C interface. The VCC terminal of the USB to serial port chip is connected to the positive output terminal of the 5V power supply, and the GND terminal is grounded. The DTR# terminal of the USB to serial port chip is connected to a sixth resistor, and the other end of the sixth resistor is grounded.

3. The 2.4G RFID radio frequency tag positioning reader according to claim 2, characterized in that, The D- terminal of the TYPE-C interface is connected to the I / O2 terminal of the electrostatic protection diode, and the D+ terminal is connected to the I / O1 terminal of the electrostatic protection diode. The GND terminal of the electrostatic protection diode is grounded, and the VCC terminal is connected to the positive output terminal of the 5V power supply. The VBUS terminal of the TYPE-C interface is connected to the positive terminal of the second diode, and the negative terminal of the second diode is connected to a fuse. The other end of the fuse is the positive output terminal of the 5V power supply, and the GND terminal of the TYPE-C interface is grounded.

4. The 2.4G RFID radio frequency tag positioning reader according to claim 3, characterized in that, The power supply circuit includes a power chip, the VIN terminal of which is connected to the positive output terminal of the 5V power supply and the GND terminal is grounded. The VOUT1 terminal of the power chip is connected to the VOUT2 terminal and is also connected to the 3.3V positive output terminal. The VOUT1 terminal of the power chip is also connected to a seventh resistor. The other end of the seventh resistor is connected to the positive terminal of the light-emitting diode, and the negative terminal of the light-emitting diode is grounded. The power chip has a first capacitor connected in parallel between its VIN terminal and GND terminal, and a second capacitor connected in parallel between its VOUT1 terminal and GND terminal.

5. The 2.4G RFID radio frequency tag positioning reader according to claim 4, characterized in that, The power chip is model AMS1117-3.3V.

6. The 2.4G RFID radio frequency tag positioning reader according to claim 1, characterized in that, The USB to serial port chip is model CH340C.

7. The 2.4G RFID radio frequency tag positioning reader according to claim 1, characterized in that, The wireless card reader pass-through module is an active 2.4G RFID card reader pass-through module, and the active 2.4G RFID card reader pass-through module model is MO3N.

8. The 2.4G RFID radio frequency tag positioning reader according to claim 1, characterized in that, The active RFID tag is an active 2.4G RFID tag, and the active 2.4G RFID tag model is M05N.

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