High-performance four-channel ultrahigh frequency reader-writer

Abstract

The utility model discloses a high-performance four-channel ultrahigh frequency reader-writer, and belongs to the technical field of wireless radio frequency identification equipment. The device comprises a microcontroller, a radio frequency processing module, an antenna, an RS485 communication module, an Ethernet / RS485 communication module, a power management control module, an input and output module, a data storage module and an LED lamp indication module. The microcontroller is respectively connected with the input and output module, the data storage module and the LED lamp indication module; the Ethernet / RS485 communication module comprises an RS485 communication module and an Ethernet port communication module; the microcontroller is connected with an upper computer through an RS485 communication module or an Ethernet port communication module; the antenna is connected with the microcontroller through the radio frequency processing module; according to the utility model, the data of the ultrahigh frequency tag can be quickly read through the antenna and the radio frequency processing module.

Description

Technical Field

[0001] This utility model relates to the field of wireless radio frequency identification equipment technology, specifically to a high-performance four-channel ultra-high frequency reader / writer. Background Technology

[0002] RFID readers, also known as RFID readers, or Radio Frequency Identification, automatically identify target objects and acquire relevant data through radio frequency identification signals without human intervention. They can identify high-speed moving objects and simultaneously identify multiple RFID tags, offering quick and convenient operation. However, existing reader technologies are complex in structure and relatively expensive. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency, high-performance four-channel ultra-high frequency reader / writer.

[0004] To solve the above technical problems, a high-performance four-channel ultra-high frequency reader / writer is provided, including a microcontroller, a radio frequency processing module, an antenna, an RS485 communication module, an Ethernet communication module, a power management control module, an input / output module, a data storage module, and an LED indicator module.

[0005] The microcontroller is connected to the input / output module, the data storage module, and the LED indicator module, respectively.

[0006] The microcontroller is connected to the host computer via an RS485 communication module or an Ethernet communication module.

[0007] The antenna is connected to the microcontroller via a radio frequency processing module;

[0008] The power management control module provides power to the microcontroller, radio frequency processing module, antenna, RS485 communication module, Ethernet communication module, input / output module, data storage module, and LED indicator module.

[0009] Preferably, the power management control module includes a power circuit one and a power circuit two connected together.

[0010] Preferably, the power supply circuit includes a first power chip U1;

[0011] The +24V voltage output terminal is combined with the VDD12V voltage output terminal through the Zener diode U12, and then connected to the VIN terminal of the first power chip U1 through the fuse BT1 and the inductor L6.

[0012] The VIN terminal of the first power chip U1 is grounded through capacitors C27 and C28 connected in parallel;

[0013] The EN terminal of the first power chip U1 is grounded through resistor R2;

[0014] The RT / CLK terminal of the first power chip U1 is grounded through resistor R3;

[0015] The EN terminal and RT / CLK terminal of the first power chip U1 are connected in parallel and then connected to the VIN terminal of the first power chip U1 through capacitors C1, C2 and C3 connected in parallel.

[0016] The VIN and EN terminals of the first power chip U1 are connected by a resistor R1.

[0017] The BOOT and SW terminals of the first power chip U1 are connected through capacitor C4;

[0018] The SW terminal of the first power chip U1 is connected to the 5V voltage output terminal of the inductor L1, and the 5V voltage output terminal is connected to the radio frequency processing module.

[0019] The SW terminal and GND terminal of the first power chip U1 are connected in parallel via capacitors C7, C8, C21 and diode D13.

[0020] The GND terminal of the first power chip U1 is grounded;

[0021] The FB terminal and SW terminal of the first power chip U1 are connected in parallel via a resistor R5 and a capacitor C11.

[0022] The FB terminal of the first power chip U1 is grounded through resistor R6;

[0023] The COMP terminal of the first power chip U1 is grounded through resistor R4 and capacitors C6 and C5 connected in parallel.

[0024] Preferably, the second power supply circuit includes a second power supply chip U14;

[0025] The 5V voltage output terminal is connected to the VIN terminal of the second power chip U14;

[0026] The SW terminal of the second power chip U14 is connected to the 3.3V voltage output terminal through inductor L4;

[0027] The SW terminal of the second power chip U14 is connected to the ST terminal of the second power chip U14 through capacitor C59;

[0028] The EN terminal of the second power chip U14 is connected to the VIN terminal of the second power chip U14 through resistor R78.

[0029] The FB terminal of the second power chip U14 is connected to the SW terminal of the second power chip U14 through resistors R79 and R80 set in series.

[0030] Preferably, the input / output module has four input / output circuits;

[0031] The input / output circuit includes optocoupler U23 and optocoupler U21;

[0032] One end of the optocoupler U23 is connected to the 3.3V digital signal output terminal through resistor R38;

[0033] The two ends of the optocoupler U23 are connected to the output terminal GPO4 of the microcontroller;

[0034] Terminal 3 of the optocoupler U23 is grounded;

[0035] The four terminals of the optocoupler U23 are connected to the gate of the PMOS transistor U22 through resistor R58.

[0036] The source of the PMOS transistor U22 is connected to the IO pin through inductor L8;

[0037] The source and gate of the PMOS transistor U22 are connected by a resistor R57 and a capacitor C45 connected in parallel.

[0038] The drain of the PMOS transistor U22 is divided into two paths: one path is grounded through the transient voltage suppression diode D1, and the other path is connected to one end of the optocoupler U21 through the resistor R39.

[0039] Terminal 2 of the optocoupler U21 is grounded;

[0040] The optocoupler U21 is connected at terminals 1 and 2 via capacitor C44;

[0041] The three terminals of the optocoupler U21 are grounded;

[0042] The four segments of the optocoupler U21 are divided into two paths: one path is connected to the input terminal GPI4 of the microcontroller, and the other path is connected to the 3.3V voltage output terminal through resistor R63.

[0043] The optocoupler U21 is connected between terminals 3 and 4 via capacitor C46.

[0044] Preferably, the data storage module includes a storage chip U8;

[0045] The CS, SO, and SCK terminals of the data storage module are connected to the microcontroller.

[0046] The 3.3V voltage output terminal is connected to the VDD terminal of the data storage module;

[0047] The VDD and HOLD terminals of the data storage module are connected by a resistor R64.

[0048] The VDD terminal of the data storage module is grounded through capacitor C63.

[0049] Preferably, the RS485 communication module includes a communication chip U9;

[0050] The 3.3V voltage output terminal is connected to the VCC terminal of the RS485 communication module;

[0051] The RO and DI terminals of the communication chip U9 are connected to the microcontroller;

[0052] The A terminal of the RS485 communication module is connected to the 485_A terminal via fuse F2;

[0053] The B terminal of the RS485 communication module is connected to the 485_B terminal via fuse F1;

[0054] The A and B terminals of the RS485 communication module are connected in parallel via a resistor R42 and a transient suppression diode D5.

[0055] The A and B terminals of the RS485 communication module are connected in series via a transient suppression diode D7 and a transient suppression diode D7 connected in series, and the transient suppression diode D7 and the transient suppression diode D7 are grounded.

[0056] Preferably, the Ethernet communication module includes a network chip U2;

[0057] The 3.3V voltage output terminal is connected to the VDD terminal of the network chip U2;

[0058] The RXN and RXP terminals of the network chip U2 are connected to the network data input terminal;

[0059] The TXN and TXP terminals of the network chip U2 are connected to the microcontroller.

[0060] Preferably, the LED indicator module includes an FPC connector and six light-emitting diodes (LEDs).

[0061] The 3.3V voltage output terminal is connected to the FPC connector;

[0062] Each of the six light-emitting diodes (LEDs) is connected at both ends to an FPC connector and a microcontroller, respectively.

[0063] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0064] This invention can quickly read data from UHF tags through the antenna and radio frequency processing module, and can transmit the read data to the host computer in real time via Ethernet / RS485, thereby enabling real-time data processing and recording; at the same time, it can also quickly send operation commands and data issued by the host computer to the UHF tags for operation through the radio frequency processing module and antenna. Attached Figure Description

[0065] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0066] Figure 1 This is a block diagram illustrating the implementation of the four-channel high-performance ultra-high frequency reader / writer of this utility model;

[0067] Figure 2 This is a schematic diagram of the operation of the novel four-channel high-performance ultra-high frequency reader / writer of this utility model;

[0068] Figure 3 This is the circuit diagram for power supply circuit one;

[0069] Figure 4 This is the circuit diagram for power supply circuit two;

[0070] Figure 5 This is the circuit diagram of the Ethernet communication module;

[0071] Figure 6 This is the circuit diagram of the input / output module;

[0072] Figure 7 This is the circuit diagram of the data storage module;

[0073] Figure 8 This is the circuit diagram of the RS485 communication module;

[0074] Figure 9 This is the circuit diagram for the LED indicator board.

[0075] Figure 10 This is the circuit diagram for the LED indicator control circuit. Detailed Implementation

[0076] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0077] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this specification. The singular forms “a,” “described,” and “the” as used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0078] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this specification, and similarly, second may also be referred to as first. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0079] The present invention will now be described in further detail with reference to the accompanying drawings:

[0080] like Figures 1-2 As shown, this utility model provides a high-performance four-channel ultra-high frequency reader / writer, including a microcontroller, a radio frequency processing module, an antenna, an RS485 communication module, an Ethernet communication module, a power management control module, an input / output module, a data storage module, and an LED indicator module;

[0081] The microcontroller is connected to the input / output module, the data storage module, and the LED indicator module, respectively.

[0082] The microcontroller is connected to the host computer via an RS485 communication module or an Ethernet communication module.

[0083] The antenna is connected to the microcontroller via a radio frequency processing module;

[0084] The power management control module provides power to the microcontroller, radio frequency processing module, antenna, RS485 communication module, Ethernet communication module, input / output module, data storage module, and LED indicator module.

[0085] Preferably, the power management control module includes a power circuit one and a power circuit two connected together.

[0086] Preferably, the power supply circuit includes a first power chip U1;

[0087] The +24V voltage output terminal is combined with the VDD12V voltage output terminal through the Zener diode U12, and then connected to the VIN terminal of the first power chip U1 through the fuse BT1 and the inductor L6.

[0088] The VIN terminal of the first power chip U1 is grounded through capacitors C27 and C28 connected in parallel;

[0089] The EN terminal of the first power chip U1 is grounded through resistor R2;

[0090] The RT / CLK terminal of the first power chip U1 is grounded through resistor R3;

[0091] The EN terminal and RT / CLK terminal of the first power chip U1 are connected in parallel and then connected to the VIN terminal of the first power chip U1 through capacitors C1, C2 and C3 connected in parallel.

[0092] The VIN and EN terminals of the first power chip U1 are connected by a resistor R1.

[0093] The BOOT and SW terminals of the first power chip U1 are connected through capacitor C4;

[0094] The SW terminal of the first power chip U1 is connected to the 5V voltage output terminal of the inductor L1, and the 5V voltage output terminal is connected to the radio frequency processing module.

[0095] The SW terminal and GND terminal of the first power chip U1 are connected in parallel via capacitors C7, C8, C21 and diode D13.

[0096] The GND terminal of the first power chip U1 is grounded;

[0097] The FB terminal and SW terminal of the first power chip U1 are connected in parallel via a resistor R5 and a capacitor C11.

[0098] The FB terminal of the first power chip U1 is grounded through resistor R6;

[0099] The COMP terminal of the first power chip U1 is grounded through resistor R4 and capacitors C6 and C5 connected in parallel.

[0100] Preferably, the second power supply circuit includes a second power supply chip U14;

[0101] The 5V voltage output terminal is connected to the VIN terminal of the second power chip U14;

[0102] The SW terminal of the second power chip U14 is connected to the 3.3V voltage output terminal through inductor L4;

[0103] The SW terminal of the second power chip U14 is connected to the ST terminal of the second power chip U14 through capacitor C59;

[0104] The EN terminal of the second power chip U14 is connected to the VIN terminal of the second power chip U14 through resistor R78.

[0105] The FB terminal of the second power chip U14 is connected to the SW terminal of the second power chip U14 through resistors R79 and R80 set in series.

[0106] Preferably, the input / output module has four input / output circuits;

[0107] The input / output circuit includes optocoupler U23 and optocoupler U21;

[0108] One end of the optocoupler U23 is connected to the 3.3V digital signal output terminal through resistor R38;

[0109] The two ends of the optocoupler U23 are connected to the output terminal GPO4 of the microcontroller;

[0110] Terminal 3 of the optocoupler U23 is grounded;

[0111] The four terminals of the optocoupler U23 are connected to the gate of the PMOS transistor U22 through resistor R58.

[0112] The source of the PMOS transistor U22 is connected to the IO pin through inductor L8;

[0113] The source and gate of the PMOS transistor U22 are connected by a resistor R57 and a capacitor C45 connected in parallel.

[0114] The drain of the PMOS transistor U22 is divided into two paths: one path is grounded through the transient voltage suppression diode D1, and the other path is connected to one end of the optocoupler U21 through the resistor R39.

[0115] Terminal 2 of the optocoupler U21 is grounded;

[0116] The optocoupler U21 is connected at terminals 1 and 2 via capacitor C44;

[0117] The three terminals of the optocoupler U21 are grounded;

[0118] The four segments of the optocoupler U21 are divided into two paths: one path is connected to the input terminal GPI4 of the microcontroller, and the other path is connected to the 3.3V voltage output terminal through resistor R63.

[0119] The optocoupler U21 is connected between terminals 3 and 4 via capacitor C46.

[0120] Preferably, the data storage module includes a storage chip U8;

[0121] The CS, SO, and SCK terminals of the data storage module are connected to the microcontroller.

[0122] The 3.3V voltage output terminal is connected to the VDD terminal of the data storage module;

[0123] The VDD and HOLD terminals of the data storage module are connected by a resistor R64.

[0124] The VDD terminal of the data storage module is grounded through capacitor C63.

[0125] Preferably, the RS485 communication module includes a communication chip U9;

[0126] The 3.3V voltage output terminal is connected to the VCC terminal of the RS485 communication module;

[0127] The RO and DI terminals of the communication chip U9 are connected to the microcontroller;

[0128] The A terminal of the RS485 communication module is connected to the 485_A terminal via fuse F2;

[0129] The B terminal of the RS485 communication module is connected to the 485_B terminal via fuse F1;

[0130] The A and B terminals of the RS485 communication module are connected in parallel via a resistor R42 and a transient suppression diode D5.

[0131] The A and B terminals of the RS485 communication module are connected in series via a transient suppression diode D7 and a transient suppression diode D7 connected in series, and the transient suppression diode D7 and the transient suppression diode D7 are grounded.

[0132] Preferably, the Ethernet communication module includes a network chip U2;

[0133] The 3.3V voltage output terminal is connected to the VDD terminal of the network chip U2;

[0134] The RXN and RXP terminals of the network chip U2 are connected to the network data input terminal;

[0135] The TXN and TXP terminals of the network chip U2 are connected to the microcontroller.

[0136] Preferably, the LED indicator module includes an FPC connector and six light-emitting diodes (LEDs).

[0137] The 3.3V voltage output terminal is connected to the FPC connector;

[0138] Each of the six light-emitting diodes (LEDs) is connected at both ends to an FPC connector and a microcontroller, respectively.

[0139] To better illustrate the technical effects of this utility model, the present utility model provides the following specific embodiments to explain the above technical process:

[0140] Example 1: A high-performance four-channel ultra-high frequency (UHF) RFID reader. An UHF RFID reader is a radio frequency identification device operating in the ultra-high frequency (UHF) band, typically between 860MHz and 960MHz (standards vary slightly by region globally). Its working principle involves transmitting energy through an electromagnetic field and using electromagnetic wave reflection coupling to read the stored information within the RFID tag, achieving non-contact automatic identification.

[0141] Ultra-high frequency technology has the following characteristics:

[0142] 1. Long-distance reading: UHF readers can accurately read tag information at distances of several meters or even tens of meters, making them suitable for scenarios requiring long-distance identification.

[0143] 2. High-speed data transmission: Supports high-speed data transmission, enabling the reading of a large number of tags in a short time, significantly improving work efficiency.

[0144] 3. Multi-tag recognition: It has the ability to read multiple tags at the same time, which is suitable for occasions that need to process a large number of items.

[0145] 4. Low cost and high efficiency: Passive RFID tags do not require battery power, are inexpensive, and can be significantly improved when used with readers.

[0146] In this embodiment, the UHF reader communicates with UHF tags wirelessly via contactless bidirectional data exchange. It uses an antenna to transmit and receive data from the UHF tags. After processing by the RF processing module and microcontroller, the data is forwarded to the host computer via Ethernet or RS485, thus achieving data exchange. The host computer can also issue command data to operate the UHF tags through the microcontroller, RF processing module, and antenna. Its RF processing module boasts powerful multi-tag processing capabilities, extremely low RF reception sensitivity, and relatively high transmission power.

[0147] This embodiment of a high-performance four-channel UHF reader / writer can quickly read data from UHF tags through an antenna and radio frequency processing module, and can transmit the read data to a host computer in real time via Ethernet / RS485, thereby enabling real-time data processing and recording; at the same time, it can also quickly send operation commands and data issued by the host computer to the UHF tags for operation through the radio frequency processing module and antenna.

[0148] Therefore, the present invention adopts the following technical solution:

[0149] The four-channel UHF reader includes a microcontroller, an RF processing module, an antenna, an RS485 communication module, an Ethernet communication module, a power management control module, an input / output module, a data storage module, an antenna expansion module, and an LED indicator module.

[0150] The power management control module provides power to the entire UHF reader / writer through the power control chip;

[0151] The RS485 communication module and the Ethernet communication module are connected to the microcontroller's port through the chip communication interface and are responsible for data communication between the host computer and the microcontroller.

[0152] The radio frequency (RF) processing module is responsible for data processing and conversion between the microcontroller and the antenna. The antenna is responsible for transmitting and receiving RF signals between the tag and the RF processing module.

[0153] The data storage module is used to store information such as network parameters and offline data;

[0154] The microcontroller is used to forward data from the RF processing module to the host computer via the RS485 / Ethernet communication module, and can also receive data from the host computer via the RS485 / Ethernet communication module. The microcontroller forwards the data to the RF processing module for processing in a timely manner; if the transmission link is down, the data is stored in the data storage module.

[0155] By adopting the technical solution of this utility model, this utility model can realize the simultaneous connection of four external antennas to one UHF reader and the use of a high-performance processor in the radio frequency processing module, which has high receiving sensitivity, thus realizing long-distance, multi-tag, and fast reading and writing identification of UHF tags.

[0156] Detailed circuit composition description:

[0157] I. The power management control module includes a power circuit.

[0158] The power supply circuit one consists of a first power chip U1 and discrete components. The first power chip U1 can be an SCT2430, which converts the input voltage to 5V. The 5V power supply can be used by the RF processing module, or it can be input to the second power supply circuit for further power conversion. Figure 3 As shown;

[0159] II. The power management control module also includes a power circuit.

[0160] The second power supply circuit consists of a second power supply chip U14 and discrete components. The second power supply chip U14 can be a BL8033CBT6 power chip, which converts the input 5V voltage to 3.3V. This 3.3V power supply can power the microcontroller and the LED lights. Figure 4 As shown;

[0161] III. Ethernet Circuit Description

[0162] The Ethernet circuit consists of a network chip U2 and discrete components. The network chip U2 can be a W5500 chip, which realizes the conversion between Ethernet signals and network data. Figure 5 As shown;

[0163] IV. Input / Output Module Description

[0164] The input / output circuit (four channels in total, taking one channel as an example) consists of optocouplers and MOSFETs. It converts external input signals into 3.3V digital signals and converts the microcontroller's output digital signals into external control signals. Its key feature is that the optocouplers provide electrical isolation between the external device and the product, improving anti-interference capabilities. Simultaneously, the circuit's input / output is adaptively controlled by a circuit composed of MOSFETs and surrounding components. That is, the same signal line can be reused as either input or output, greatly providing flexibility in port usage and meeting the requirements of different scenarios; for example... Figure 6 As shown;

[0165] V. Data Storage Module

[0166] The data storage circuit consists of a storage chip U8 and resistors. SPI_CSN, SPI_MISO, SPI_MOSI, and SPI_SCK are connected to the microcontroller. Data processed by the microcontroller module is stored in the data storage chip, and the microcontroller can also read data from the data storage chip for use. Figure 7 As shown;

[0167] VI. Microcontroller

[0168] The microcontroller includes a microcontroller chip U10, the core of which is a high-performance microcontroller chip, using the GD32F303VCT6 chip. It can realize the functional control and data processing of this product by burning firmware.

[0169] VII. RS485 Communication Module

[0170] The RS485 communication module consists of a communication chip U9 and discrete components. The communication chip U9 can be an RS485 PHY chip, which converts the standard RS485 signals (485_A485_B) into serial data and sends it to the microcontroller via USART1_RX and USART1_TX. This circuit features three transient suppression diodes to significantly absorb surge interference signals present in RS485 communication, and two fuses to prevent damage to the RS485 communication port due to high current. Figure 8 As shown;

[0171] 8. LED indicator module

[0172] 1. LED indicator board circuit, such as Figure 9 As shown;

[0173] 2. LED indicator control circuit, such as Figure 10 As shown;

[0174] The LED indicator module consists of an LED indicator board circuit and an LED indicator control circuit (a total of six types of indicator lights, with RDY as an example shown in the figure). The light board is connected to the main board of this patented product via an FPC flexible cable. The MCU control module outputs control signals, which are then controlled by transistors to drive the LEDs on the light board to change their brightness and thus achieve the status changes of the product's functions.

[0175] in:

[0176] RDY: Indicates that the product is ready;

[0177] RESULT: Indicates the detection status of this product for UHF tags;

[0178] LINK: Indicates the network connection and data communication status of this product;

[0179] RF: Indicates whether the radio frequency processing module of this product is operating normally;

[0180] SD: Indicates the status of the SD card in this product;

[0181] ALARM: Indicates whether this product has triggered an alarm due to an abnormal fault.

[0182] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-performance four-channel ultra-high frequency reader / writer, characterized in that, It includes a microcontroller, an RF processing module, an antenna, an RS485 communication module, an Ethernet / RS485 communication module, a power management control module, an input / output module, a data storage module, and an LED indicator module; The microcontroller is connected to the input / output module, the data storage module, and the LED indicator module, respectively. The Ethernet / RS485 communication module includes an RS485 communication module and an Ethernet port communication module; The microcontroller is connected to the host computer via an RS485 communication module or an Ethernet communication module. The antenna is connected to the microcontroller via a radio frequency processing module; The power management control module provides power to the microcontroller, radio frequency processing module, antenna, RS485 communication module, Ethernet communication module, input / output module, data storage module, and LED indicator module. The power management control module includes a power circuit one and a power circuit two connected together. The power supply circuit includes a first power chip U1; The +24V voltage output terminal is combined with the VDD12V voltage output terminal through the Zener diode U12, and then connected to the VIN terminal of the first power chip U1 through the fuse BT1 and the inductor L6. The VIN terminal of the first power chip U1 is grounded through capacitors C27 and C28 connected in parallel; The EN terminal of the first power chip U1 is grounded through resistor R2; The RT / CLK terminal of the first power chip U1 is grounded through resistor R3; The EN terminal and RT / CLK terminal of the first power chip U1 are connected in parallel and then connected to the VIN terminal of the first power chip U1 through capacitors C1, C2 and C3 connected in parallel. The VIN and EN terminals of the first power chip U1 are connected by a resistor R1. The BOOT and SW terminals of the first power chip U1 are connected through capacitor C4; The SW terminal of the first power chip U1 is connected to the 5V voltage output terminal of the inductor L1, and the 5V voltage output terminal is connected to the radio frequency processing module. The SW terminal and GND terminal of the first power chip U1 are connected in parallel via capacitors C7, C8, C21 and diode D13. The GND terminal of the first power chip U1 is grounded; The FB terminal and SW terminal of the first power chip U1 are connected in parallel via a resistor R5 and a capacitor C11. The FB terminal of the first power chip U1 is grounded through resistor R6; The COMP terminal of the first power chip U1 is grounded through resistor R4 and capacitors C6 and C5 connected in parallel.

2. The high-performance four-channel ultra-high frequency reader / writer according to claim 1, characterized in that: The second power supply circuit includes a second power supply chip U14; The 5V voltage output terminal is connected to the VIN terminal of the second power chip U14; The SW terminal of the second power chip U14 is connected to the 3.3V voltage output terminal through inductor L4; The SW terminal of the second power chip U14 is connected to the ST terminal of the second power chip U14 through capacitor C59; The EN terminal of the second power chip U14 is connected to the VIN terminal of the second power chip U14 through resistor R78. The FB terminal of the second power chip U14 is connected to the SW terminal of the second power chip U14 through resistors R79 and R80 set in series.

3. The high-performance four-channel ultra-high frequency reader / writer according to claim 2, characterized in that: The input / output module has four input / output circuits. The input / output circuit includes optocoupler U23 and optocoupler U21; One end of the optocoupler U23 is connected to the 3.3V digital signal output terminal through resistor R38; The two ends of the optocoupler U23 are connected to the output terminal GPO4 of the microcontroller; Terminal 3 of the optocoupler U23 is grounded; The four terminals of the optocoupler U23 are connected to the gate of the PMOS transistor U22 through resistor R58. The source of the PMOS transistor U22 is connected to the IO pin through inductor L8; The source and gate of the PMOS transistor U22 are connected by a resistor R57 and a capacitor C45 connected in parallel. The drain of the PMOS transistor U22 is divided into two paths: one path is grounded through the transient voltage suppression diode D1, and the other path is connected to one end of the optocoupler U21 through the resistor R39. Terminal 2 of the optocoupler U21 is grounded; The optocoupler U21 is connected at terminals 1 and 2 via capacitor C44; The three terminals of the optocoupler U21 are grounded; The four segments of the optocoupler U21 are divided into two paths: one path is connected to the input terminal GPI4 of the microcontroller, and the other path is connected to the 3.3V voltage output terminal through resistor R63. The optocoupler U21 is connected between terminals 3 and 4 via capacitor C46.

4. The high-performance four-channel ultra-high frequency reader / writer according to claim 3, characterized in that: The data storage module includes a storage chip U8; The CS, SO, and SCK terminals of the data storage module are connected to the microcontroller. The 3.3V voltage output terminal is connected to the VDD terminal of the data storage module; The VDD and HOLD terminals of the data storage module are connected by a resistor R64. The VDD terminal of the data storage module is grounded through capacitor C63.

5. The high-performance four-channel ultra-high frequency reader / writer according to claim 4, characterized in that: The RS485 communication module includes a communication chip U9; The 3.3V voltage output terminal is connected to the VCC terminal of the RS485 communication module; The RO and DI terminals of the communication chip U9 are connected to the microcontroller; The A terminal of the RS485 communication module is connected to the 485_A terminal via fuse F2; The B terminal of the RS485 communication module is connected to the 485_B terminal via fuse F1; The A and B terminals of the RS485 communication module are connected in parallel via a resistor R42 and a transient suppression diode D5. The A and B terminals of the RS485 communication module are connected in series via a transient suppression diode D7 and a transient suppression diode D7 connected in series, and the transient suppression diode D7 and the transient suppression diode D7 are grounded.

6. The high-performance four-channel ultra-high frequency reader / writer according to claim 5, characterized in that: The Ethernet communication module includes a network chip U2; The 3.3V voltage output terminal is connected to the VDD terminal of the network chip U2; The RXN and RXP terminals of the network chip U2 are connected to the network data input terminal; The TXN and TXP terminals of the network chip U2 are connected to the microcontroller.

7. The high-performance four-channel ultra-high frequency reader / writer according to claim 6, characterized in that: The LED indicator module includes an FPC connector and six light-emitting diodes (LEDs). The 3.3V voltage output terminal is connected to the FPC connector; Each of the six light-emitting diodes (LEDs) is connected at both ends to an FPC connector and a microcontroller, respectively.

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