An active identification RFID 2.45G electronic tag with long reading distance and wide use scene

Abstract

The utility model relates to the field of radio frequency identification, concretely relates to a kind of active identification RFID2.45G electronic tags with long reading distance and wide use scene. By setting high gain antenna and power amplifier, so that in the ideal condition of open ground, no obstacle block, the transmission distance of the present RFID2.45G electronic tag can reach 300M, realizes long-distance data transmission. Traditional passive RFID tag works due to relying on the energy emitted by reader, its working range is usually shorter, and the present RFID2.45G electronic tag has power supply, can send signal actively, even in part shielding condition, enough signal strength can be maintained to communicate;By setting low-power MCU, power consumption is optimized, the working time of label is prolonged, and the ability of stable operation in different environments is guaranteed. The problems of short transmission distance and radio frequency signal vulnerable to shielding in existing passive RFID electronic tag are solved.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency identification technology, and in particular to an active RFID 2.45G electronic tag with long reading distance and wide application scenarios. Background Technology

[0002] Passive RFID tags identify specific targets and read / write related data via radio signals without requiring mechanical or optical contact between the identification system and the target. Because they do not require a built-in power supply, they have significant advantages in terms of cost and lifespan.

[0003] However, since passive RFID tags rely on electromagnetic field energy received from the reader to work, their working range is usually limited to a relatively short distance. When the path between the tag and the reader is blocked by water, metal or other high-density materials, the signal strength will be greatly weakened or even completely lost, resulting in reading failure. This limits their application range and flexibility to some extent.

[0004] Therefore, there is an urgent need for an active identification RFID 2.45G electronic tag with a long reading range and wide range of applications. Utility Model Content

[0005] To address the issues of short transmission distance and susceptibility of radio frequency signals to obstructions in existing passive RFID electronic tags.

[0006] This invention provides an active RFID 2.45G electronic tag with long reading range and wide application scenarios, including a base, a top cover, a circuit board, and a button battery. The circuit board and the button battery are both installed in the internal space enclosed by the top cover and the base. The conductive contacts of the circuit board are electrically connected to the button battery. The circuit board is equipped with a low-power MCU, an RF chip, a power amplifier, and a high-gain antenna. The low-power MCU is electrically connected to the RF chip and is used to control communication timing and coordinate data transmission. The RF chip is used to process 2.45GHz wireless signals. The input terminal of the power amplifier is connected to the output terminal of the RF chip, and the output terminal of the power amplifier is electrically connected to the high-gain antenna. The high-gain antenna is used to transmit and receive 2.45GHz wireless signals.

[0007] Preferably, the low-power MCU is the STM32 series MCU.

[0008] Preferably, the high-gain antenna is a PCB high-gain antenna or a microstrip patch high-gain antenna.

[0009] Preferably, the circuit board also includes a DC-DC converter, the input terminal of the DC-DC converter and the conductive contacts are electrically connected, and the output terminal of the DC-DC converter and the power input terminal of the low-power MCU are electrically connected.

[0010] Preferably, the circuit board also includes a voltage regulator, the input of which is connected to the output of the DC-DC converter, and the output of which is electrically connected to the power input of the low-power MCU.

[0011] Preferably, the base is provided with a support column, and the circuit board is provided with locking holes around its perimeter corresponding to the positions of the support column; the base is provided with grooves on both sides, and a first threaded hole is provided in the grooves, and the top cover is provided with a second threaded hole corresponding to the position of the first threaded hole.

[0012] Preferably, the base has a waterproof step, and the inside of the waterproof step has a rubber ring.

[0013] The beneficial effects of this invention are reflected in the fact that, by setting up a high-gain antenna and power amplifier, the transmission distance of this RFID 2.45G electronic tag can reach 300M under ideal conditions of open ground and no obstructions, realizing long-distance data transmission. Traditional passive RFID tags rely on the energy emitted by the reader to work, and their working range is usually short. However, this RFID 2.45G electronic tag has its own power supply and can actively transmit signals, maintaining sufficient signal strength for communication even under partial obstruction. By setting up a low-power MCU, power consumption is optimized, extending the tag's working time, while ensuring stable operation in different environments. This solves the problems of short transmission distance and susceptibility of radio frequency signals to obstructions in existing passive RFID electronic tags. Attached Figure Description

[0014] Fig. 1 This is a perspective view of an active RFID 2.45G electronic tag with a long reading range and wide application scenarios provided by this utility model.

[0015] Fig. 2 An exploded view of an active RFID 2.45G electronic tag with long reading range and wide application scenarios provided by this utility model.

[0016] Fig. 3 This is a connection block diagram of the circuit board provided by this utility model.

[0017] In the diagram: 1-Base; 11-Support column; 12-Groove; 13-First threaded hole; 14-Waterproof step; 2-Top cover; 21-Second threaded hole; 3-Circuit board; 31-Conductive contact; 32-Low power MCU; 33-RF chip; 34-Power amplifier; 35-High gain antenna; 36-DC-DC converter; 37-Voltage regulator; 38-Card slot; 4-Button battery. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Reference Figs. 1-3 An active RFID 2.45G electronic tag with long reading range and wide application scenarios includes a base 1, a top cover 2, a circuit board 3, and a button battery 4. The circuit board 3 and the button battery 4 are both installed in the internal space enclosed by the top cover 2 and the base 1. The conductive contacts 31 of the circuit board 3 are electrically connected to the button battery 4. The circuit board 3 is equipped with a low-power MCU 32, an RF chip 33, a power amplifier 34, and a high-gain antenna 35. The low-power MCU 32 is electrically connected to the RF chip 33 and is used to control communication timing and coordinate data transmission. The RF chip 33 is used to process 2.45GHz wireless signals. The input terminal of the power amplifier 34 is connected to the output terminal of the RF chip 33, and the output terminal of the power amplifier 34 is electrically connected to the high-gain antenna 35. The high-gain antenna 35 is used to transmit and receive 2.45GHz wireless signals.

[0020] By incorporating a high-gain antenna 35 and a power amplifier 34, this RFID 2.45G electronic tag achieves a transmission distance of up to 300 meters under ideal conditions of open ground and no obstructions, enabling long-distance data transmission. Traditional passive RFID tags rely on energy from the reader for operation, resulting in a typically short operating range. This RFID 2.45G electronic tag, however, is self-powered and can actively transmit signals, maintaining sufficient signal strength for communication even under partial obstruction. The use of a low-power MCU 32 optimizes power consumption, extends the tag's operating time, and ensures stable operation in various environments. This solves the problems of short transmission distance and susceptibility to obstructions inherent in existing passive RFID electronic tags.

[0021] Specifically, the RF chip 33 modulates the digital signal into an analog signal suitable for wireless transmission and demodulates the received wireless signal. The circuit board 3 also includes a non-volatile memory, which is connected to the low-power MCU 32 via an I²C or SPI interface. This non-volatile memory stores the electronic tag's identification information, user data, and temporary data generated during interaction with the reader.

[0022] In some implementations, the low-power MCU32 is an STM32 series MCU.

[0023] The STM32 series MCUs boast rich peripherals and powerful processing capabilities, enabling precise control of the communication timing of the RF chip 33 and effective management of data transmission to ensure efficient and stable communication. By utilizing the STM32's various low-power modes, the device's lifespan can be maximized without compromising performance. Furthermore, the low-power MCU32 can also be a variant of the MSP430 series MCU.

[0024] In some implementations, the high-gain antenna 35 is a PCB high-gain antenna 35 or a microstrip patch high-gain antenna 35.

[0025] Both the PCB high-gain antenna 35 and the microstrip patch high-gain antenna 35 can be designed directly on the circuit board 3 without the need for additional antenna mounting space. This not only helps to reduce the size of the entire device, but also simplifies the manufacturing process and reduces production costs.

[0026] In some embodiments, the circuit board 3 also includes a DC-DC converter 36, the input terminal of which is electrically connected to the conductive contact 31, and the output terminal of which is electrically connected to the power input terminal of the low-power MCU 32.

[0027] Reference Fig. 3 The DC-DC converter 36 is used to convert the voltage provided by the button battery 4 into a voltage suitable for the operation of the low-power MCU 32; specifically, the DC-DC converter 36 converts the 3V voltage into an operating voltage of 1.8V. The DC-DC converter 36 provides a stable power supply to the low-power MCU 32 to ensure the reliable operation of the entire circuit system.

[0028] Preferably, the circuit board 3 also includes a voltage regulator 37, the input terminal of which is connected to the output terminal of the DC-DC converter 36, and the output terminal of the voltage regulator 37 is electrically connected to the power input terminal of the low-power MCU 32.

[0029] Reference Fig. 3 Various interference sources may exist in the working environment of electronic tags, which may cause instantaneous rises or falls in voltage. Although the DC-DC converter 36 can provide a relatively stable voltage output, its output may still have some small fluctuations. The regulator 37 can further smooth out these fluctuations, provide a stable output voltage, ensure a cleaner and more stable power supply for low-power MCUs, and prevent failures or damage caused by abnormal voltage.

[0030] In some embodiments, the base 1 is provided with a support column 11, and the circuit board 3 is provided with a snap hole 38 around its perimeter corresponding to the position of the support column 11; the base 1 is provided with a groove 12 on both sides, and a first threaded hole 13 is provided in the groove 12, and the top cover 2 is provided with a second threaded hole 21 corresponding to the position of the first threaded hole 13.

[0031] Reference Figs. 1-2 The circuit board 3 and the base 1 are connected by a snap-fit ​​hole 38 to the support column 11, ensuring that the circuit board 3 is firmly fixed to the base 1, reducing the risk of damage caused by vibration or impact, maintaining good contact between the conductive contacts 31 and the button battery 4, and also facilitating heat dissipation of the circuit board 3. The base 1 and the top cover 2 are connected by bolts through the first threaded hole 13 and the second threaded hole 21, which facilitates the maintenance or replacement of the electronic sticky note; the groove 12 makes it easy for the bolts to be aligned with the first threaded hole 13 and the second threaded hole 21.

[0032] In some embodiments, the base 1 is provided with a waterproof step 14, and a rubber ring is provided inside the waterproof step 14.

[0033] Reference Fig. 2 Once the electronic tag is assembled, the rubber ring is compressed within the waterproof layer 14, preventing moisture from entering the device through the gap between the base 1 and the top cover 2. Whether outdoors, in industrial environments, or other humid locations, the electronic tag operates stably and reliably, expanding its application scenarios.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 2.45G active RFID electronic tag with long reading range and wide application scenarios, comprising a base, a top cover, a circuit board, and a button battery, wherein the circuit board and the button battery are both installed in the internal space enclosed by the top cover and the base, and the conductive contacts of the circuit board are electrically connected to the button battery; characterized in that: The circuit board contains a low-power MCU, an RF chip, a power amplifier, and a high-gain antenna. The low-power MCU is electrically connected to the RF chip and is used to control communication timing and coordinate data transmission. The RF chip is used to process 2.45GHz wireless signals. The input of the power amplifier is connected to the output of the RF chip, and the output of the power amplifier is electrically connected to the high-gain antenna. The high-gain antenna is used to transmit and receive 2.45GHz wireless signals. The low-power MCU is an STM32 series MCU; The high-gain antenna is a PCB high-gain antenna or a microstrip patch high-gain antenna.

2. The active RFID 2.45G electronic tag with long reading range and wide application scenarios according to claim 1, characterized in that: The circuit board also includes a DC-DC converter, the input terminal of which is electrically connected to conductive contacts, and the output terminal of which is electrically connected to the power input terminal of a low-power MCU.

3. The active RFID 2.45G electronic tag with long reading range and wide application scenarios according to claim 2, characterized in that: The circuit board also includes a voltage regulator, the input of which is connected to the output of the DC-DC converter, and the output of which is electrically connected to the power input of the low-power MCU.

4. The active RFID 2.45G electronic tag with long reading range and wide application scenarios according to claim 1, characterized in that: The base is provided with a support column, and the circuit board is provided with locking holes around its perimeter corresponding to the positions of the support column; the base is provided with grooves on both sides, and a first threaded hole is provided in the grooves, and a second threaded hole is provided on the top cover corresponding to the position of the first threaded hole.

5. The active RFID 2.45G electronic tag with long reading range and wide application scenarios according to claim 1, characterized in that: The base is equipped with a waterproof step, and a rubber ring is installed inside the waterproof step.

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