1. A near field antenna board based on an RFID (radio frequency identification) technology is characterized in that the near field antenna board integrates a hardware circuit board and embedded control software, the near field antenna hardware circuit board comprises a near field antenna MCU (1), a radio frequency switch chip (2), an antenna oscillator (3), a photoelectric switch (5), an indicator lamp (6), an RS485 interface (7) and a radio frequency interface (8), and the embedded control software operates in the near field antenna MCU (1);

the near field antenna MCU (1) is a controller of a near field antenna board and is communicated with a control module of the RFID product through an RS485 interface (7), and embedded control software of the near field antenna MCU (1) analyzes a data protocol of the control module of the RFID product and controls the near field antenna, the photoelectric switch (5) and the indicator lamp (6) to work;

the radio frequency switch chip (2) adopts a one-to-two and one-to-six layout, the primary radio frequency switch chip is connected with 2 secondary radio frequency switch chips, each secondary radio frequency switch chip is connected with 6 antenna oscillators (3), and the two-layer mode design is expanded into 12-path antennas; the primary radio frequency switch chip is connected with the near field antenna MCU (1), and is also connected with an antenna feeder of a control module of the RFID product through a radio frequency interface (8) to control the radio frequency switch chip and the 12-path antenna oscillator (3) to work;

the photoelectric switch (5) is connected with the near-field antenna MCU (1), each antenna oscillator (3) corresponds to one photoelectric switch, the photoelectric switch (5) senses the existence state of an object in an antenna area, informs the near-field antenna MCU (1) of analysis and processing, and starts the corresponding antenna to count;

the indicating lamp (6) is connected with the near field antenna MCU (1) and controlled by the near field antenna MCU (1), the near field antenna MCU (1) analyzes a data protocol of a control module of the RFID product, and the state of the indicating lamp is controlled while the antenna is started to check.

2. The RFID-based near-field antenna board of claim 1, wherein the connection line between the first-stage RF switch chip and the second-stage RF switch chip, and the connection line between the second-stage RF switch chip and the antenna element (3) are RF traces (4).

3. The RFID-based near-field antenna panel of claim 2, wherein the distances from the primary rf switch chip to the two secondary rf switch chips are equal, and the distances from the secondary rf switch chips to the antenna elements are equal.

4. A near field antenna plate based on RFID radio frequency identification technology according to claim 3, characterized in that the radio frequency switch chip (2) has a receive channel and a transmit channel, supporting multi-channel time-sharing operation.

5. A near field antenna panel based on RFID radio frequency identification technology according to any of claims 1-4 characterized in that the antenna element (3) takes the form of a PIFA antenna, the antenna element is a rectangular copper sheet, the size of the copper sheet determines the power of the near field antenna, and there are 12 antenna elements on the panel to form a 12-way near field antenna.

6. A near field antenna panel based on RFID radio frequency identification technology according to claim 5, wherein the antenna elements are on the fourth layer of the PCB, the ground is on the second layer of the PCB, and the feed points and the feed lines are on the first layer of the PCB.

7. A near field antenna panel based on RFID radio frequency identification technology as claimed in claim 5 wherein the overall length of the antenna is 1/4 wavelengths.

8. The RFID radio frequency identification technology-based near field antenna panel of claim 1, wherein the RS485 interface (7) is an external interface of the near field antenna panel, located at an edge of the near field antenna panel.

9. The RFID radio frequency identification technology-based near field antenna board as claimed in claim 8, wherein networking of the RS485 interface (7) is facilitated, facilitating cascading and expansion of the near field antenna board; 24 near field antennas are needed for one RFID product, the RFID product is directly connected with two near field antenna boards through an RS485 interface (7), 36 near field antennas are needed for one RFID product, and the RFID product is directly connected with three near field antenna boards through the RS485 interface (7).

10. Near field antenna panel based on RFID radio frequency identification technology according to claim 1 characterized in that the radio frequency interface (8) is located at the edge of the near field antenna panel.

Background

The near field antenna based on the RFID technology is used as the core technology of the Internet of things, and has the main advantages that the near field antenna is matched with a control module of an RFID product to read and write the radio frequency tag in an open space, and the real-time collection and identification of the radio frequency tag have great advantages in the industry of the Internet of things.

At present, in the article management process, the checking depends on hardware equipment such as a handset, a bar code gun and the like, and the manual work of the work of delivering articles out of a warehouse, warehousing the articles, checking the articles and the like is assisted. The antenna used in the existing article management process can not accurately position articles, and the existing antenna can not be positioned in layers.

Disclosure of Invention

Technical problem to be solved

The invention aims to solve the technical problem of how to provide a near-field antenna plate based on an RFID (radio frequency identification) technology, so as to solve the problem that the existing antenna cannot accurately position an article and the problem that the existing antenna cannot be positioned in a layer.

(II) technical scheme

In order to solve the technical problem, the invention provides a near field antenna board based on an RFID (radio frequency identification) technology, which integrates a hardware circuit board and embedded control software, wherein the near field antenna hardware circuit board comprises a near field antenna MCU (1), a radio frequency switch chip (2), an antenna oscillator (3), a photoelectric switch (5), an indicator lamp (6), an RS485 interface (7) and a radio frequency interface (8), and the embedded control software runs in the near field antenna MCU (1);

the near field antenna MCU (1) is a controller of a near field antenna board and is communicated with a control module of the RFID product through an RS485 interface (7), and embedded control software of the near field antenna MCU (1) analyzes a data protocol of the control module of the RFID product and controls the near field antenna, the photoelectric switch (5) and the indicator lamp (6) to work;

the radio frequency switch chip (2) adopts a one-to-two and one-to-six layout, the primary radio frequency switch chip is connected with 2 secondary radio frequency switch chips, each secondary radio frequency switch chip is connected with 6 antenna oscillators (3), and the two-layer mode design is expanded into 12-path antennas; the primary radio frequency switch chip is connected with the near field antenna MCU (1), and is also connected with an antenna feeder of a control module of the RFID product through a radio frequency interface (8) to control the radio frequency switch chip and the 12-path antenna oscillator (3) to work;

the photoelectric switch (5) is connected with the near-field antenna MCU (1), each antenna oscillator (3) corresponds to one photoelectric switch, the photoelectric switch (5) senses the existence state of an object in an antenna area, informs the near-field antenna MCU (1) of analysis and processing, and starts the corresponding antenna to count;

the indicating lamp (6) is connected with the near field antenna MCU (1) and controlled by the near field antenna MCU (1), the near field antenna MCU (1) analyzes a data protocol of a control module of the RFID product, and the state of the indicating lamp is controlled while the antenna is started to check.

Furthermore, a connection line between the first-stage radio frequency switch chip and the second-stage radio frequency switch chip and a connection line between the second-stage radio frequency switch chip and the antenna oscillator (3) are radio frequency wiring lines (4).

Further, the distances from the first-stage radio frequency switch chip to the two second-stage radio frequency switch chips are equal, and the distances from the second-stage radio frequency switch chips to the antenna oscillator are equal.

Furthermore, the radio frequency switch chip (2) is provided with a receiving channel and a transmitting channel and supports multi-channel time-sharing work.

Furthermore, the antenna oscillator (3) adopts a PIFA antenna form, the antenna oscillator is a rectangular copper sheet, the size of the copper sheet determines the power of the near-field antenna, and 12 antenna oscillators are arranged on the board to form a 12-path near-field antenna.

Furthermore, the antenna element is arranged on the fourth layer of the PCB, the ground is arranged on the second layer of the PCB, and the feed point and the feed line are arranged on the first layer of the PCB.

Further, the overall length of the antenna is 1/4 wavelengths.

Furthermore, the RS485 interface (7) is an external interface of the near field antenna board and is positioned at the edge of the near field antenna board.

Furthermore, the RS485 interface (7) is convenient to network, and the near-field antenna boards are convenient to cascade and expand; 24 near field antennas are needed for one RFID product, the RFID product is directly connected with two near field antenna boards through an RS485 interface (7), 36 near field antennas are needed for one RFID product, and the RFID product is directly connected with three near field antenna boards through the RS485 interface (7).

Further, the radio frequency interface (8) is located at the edge of the near field antenna board.

(III) advantageous effects

Compared with the prior art, the near-field antenna plate based on the RFID technology has the following advantages that:

(1) the near-field antenna technology is adopted, the energy radiation capability of the near-field antenna is weak, and the radiation direction angle is small, so that the antenna can only read a small range, the energy radiation is intensively restricted in a relatively close range right above the antenna, the reading effect of a short distance is ensured, and the antenna is designed to achieve the effects of not misreading and not serially reading the peripheral electronic tags.

(2) According to the invention, the two-layer mode design is expanded into 12-path antennas through the one-to-two and one-to-six layouts of the radio frequency switch chip, and the near-field antenna adopts a time division multiplexing working mode.

(3) The radio frequency wiring is a connection line between the radio frequency switch chip and the antenna, the distances from the one-drive-two radio frequency switch chip to the two-drive-six radio frequency switch chip are equal, and the distances from the one-drive-six radio frequency switch chip to the antenna are equal. The input power of each antenna is consistent, and the consistency of each antenna is ensured.

(4) The near-field antenna plate based on the RFID technology has the advantages of being anti-interference and extensible.

Drawings

FIG. 1 is a front view of a near-field antenna plate object based on RFID technology of the present invention;

FIG. 2 is a real reverse side view of a near-field antenna plate based on RFID technology of the present invention;

FIG. 3 is a TOP layer diagram of the near field antenna PCB wiring based on RFID technology;

FIG. 4 is a BOTTOM layer diagram of the near-field antenna PCB wiring based on RFID technology of the present invention;

fig. 5 is a diagram of a near field antenna board structure based on RFID technology.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The near-field antenna based on the RFID technology realizes in-layer positioning, real-time tracking and positioning in the process of article management, and real-time, intelligent and automatic management of articles in the process of article full life cycle management such as warehousing, inquiry and delivery of articles.

In order to solve the technical problem, the invention provides a near field antenna board based on an RFID (radio frequency identification) technology, which integrates a hardware circuit board and embedded control software based on the RFID technology, wherein the near field antenna hardware circuit board consists of a near field antenna MCU (1), a radio frequency switch chip (2), an antenna oscillator (3), a radio frequency wiring (4), a photoelectric switch (5) and an indicator light (6). The near field antenna MCU (1) is a controller of the near field antenna board. The radio frequency switch chip (2) and the antenna oscillator (3) are connected by a radio frequency wire (4). The external interface is an RS485 interface (7) and a radio frequency interface (8), and the edge of the external interface near-field antenna board. And embedded control software of the near field antenna MCU (1) analyzes a data protocol of a control module of the RFID product and controls the near field antenna to work.

Further, the near field antenna MCU (1) on the hardware circuit board is a controller of the near field antenna board. The antenna is communicated with a control module of the RFID product through an RS485 interface (7) to carry out protocol analysis and control communication, and is connected with an antenna feeder line of the control module of the RFID product through a radio frequency interface to control a radio frequency switch chip and 12 antenna oscillators (3) to work.

Furthermore, the radio frequency switch chip (2) on the hardware circuit board is provided with a receiving channel and a transmitting channel, and supports multi-channel time-sharing work.

Furthermore, the antenna of the antenna oscillator (3) on the hardware circuit board adopts a PIFA antenna form, the antenna oscillator is a rectangular copper sheet, and the size of the copper sheet determines the power of the near-field antenna. The antenna element is arranged on the fourth layer of the PCB, the ground is arranged on the second layer of the PCB, the whole layer is paved to play a shielding role, the feed point and the feed line are arranged on the first layer of the PCB, and the whole length of the antenna is 1/4 wavelengths. Through the one-to-two and one-to-six layouts of the radio frequency switch chip and the design of a two-layer mode, 12 antenna oscillators are arranged on a board to form a 12-path near-field antenna.

Further, the hardware circuit board is provided with a radio frequency wire (4). The distance from one-to-two radio frequency switch chips to two-to-six radio frequency switch chips is equal, and the distance from one-to-six radio frequency switch chips to an antenna is equal.

Furthermore, an optoelectronic switch (5) on the hardware circuit board is connected with the near-field antenna MCU to sense whether an object is placed on the near-field antenna. Each antenna corresponds to a photoelectric switch, the existence state of an object in an antenna area is sensed, the object is analyzed and processed by a near-field antenna MCU, and counting of the corresponding antenna is started.

Furthermore, an indicator light (6) on the hardware circuit board is controlled by the near-field antenna MCU, the near-field antenna MCU analyzes a data protocol of a control module of the RFID product, and the state of the indicator light is controlled while the antenna is started to check.

Furthermore, the external interface RS485 interface (7) is a communication interface of the near field antenna board and a control module of the RFID product. The RS485 interface (7) is convenient to network, a near field antenna board based on the RFID technology is convenient to cascade, and the extension is convenient.

Furthermore, the external interface radio frequency interface (8) is connected with a radio frequency switch chip of the near field antenna board and a radio frequency interface of a control module of the RFID product, and the radio frequency switch chip and the near field antenna MCU are matched with the control module of the RFID product together to finish the counting work of the objects carrying the radio frequency tags.

Furthermore, embedded control software of the near field antenna MCU (1) analyzes a data protocol of a control module of the RFID product and controls the near field antenna to work. The other function of the embedded control software of the near-field antenna MCU (1) is to control the photoelectric switch and the indicator light to work.

This is illustrated below with reference to fig. 1-5.

The near field antenna plate based on the RFID technology is an important component of an RFID product, and is matched with a control module of the RFID product (the RFID product and the control module of the RFID product are not described in the patent) to finish the counting work of articles carrying radio frequency tags. The near-field antenna plate based on the RFID technology reads and writes the radio frequency label in an open space, energy radiation is intensively restricted in a relatively close range right above the antenna, and a close-range reading effect is guaranteed. The antenna is designed to achieve the effects of not misreading and not reading the peripheral electronic tags in series.

According to an embodiment of the near field antenna board based on the RFID technology, the near field antenna board based on the RFID technology integrates a hardware circuit board and embedded control software, and the near field antenna hardware circuit board comprises a near field antenna MCU (1), a radio frequency switch chip (2), an antenna oscillator (3), a radio frequency wiring (4), a photoelectric switch (5), an indicator light (6), an RS485 interface (7) and a radio frequency interface (8).

The near field antenna MCU (1) is a controller of the near field antenna board. And embedded control software of the near field antenna MCU (1) analyzes a data protocol of a control module of the RFID product and controls the near field antenna to work. The RS485 interface (7) is an external interface of the near field antenna plate and is positioned at the edge of the near field antenna plate, the near field antenna MCU (1) based on the RFID technology is a controller of the near field antenna plate and is communicated with a control module of an RFID product through the RS485 interface (7) to carry out protocol analysis and control communication.

The radio frequency switch chip (2) adopts a one-to-two and one-to-six layout, the primary radio frequency switch chip is connected with 2 secondary radio frequency switch chips, each secondary radio frequency switch chip is connected with 6 antenna oscillators (3), and the two-layer mode design is expanded into 12-path antennas. The primary radio frequency switch chip is connected with the near field antenna MCU (1), and in one embodiment, the primary radio frequency switch chip is connected with the near field antenna MCU (1) by a common connecting line on a PCB. The connection line of the first-stage radio frequency switch chip and the second-stage radio frequency switch chip and the connection line between the second-stage radio frequency switch chip and the antenna oscillator (3) are radio frequency wiring lines (4). The radio frequency interface (8) is located at the edge of the near-field antenna board, and the primary radio frequency switch chip is further connected with an antenna feeder of a control module of the RFID product through the radio frequency interface (8) to control the radio frequency switch chip and the 12-path antenna oscillator (3) to work.

The radio frequency switch chip (2) of the near-field antenna plate based on the RFID technology is provided with a receiving channel and a transmitting channel, and supports multi-channel time-sharing work.

The near-field antenna board based on the RFID technology is characterized in that a radio frequency switch chip is arranged in a one-to-two and one-to-six mode, a primary radio frequency switch chip is connected with 2 secondary radio frequency switch chips, each secondary radio frequency switch chip is connected with 6 antennas, and the two-layer mode design is expanded into 12-path antennas. The near-field antenna plate based on the RFID technology adopts a time-sharing multiplexing working mode, and has the advantages of interference resistance and expandability.

The 12-path antenna element (3) of the near-field antenna plate based on the RFID technology adopts a PIFA antenna form, the antenna element is a rectangular copper sheet, and the size of the copper sheet determines the power of the near-field antenna. The antenna element is arranged on the fourth layer of the PCB, the ground is arranged on the second layer of the PCB, the whole layer is paved to play a shielding role, the feed point and the feed line are arranged on the first layer of the PCB, and the whole length of the antenna is 1/4 wavelengths. Through the one-to-two and one-to-six layouts of the radio frequency switch chip and the design of a two-layer mode, 12 antennas form a 12-path near-field antenna on the board.

According to an embodiment of the near-field antenna board based on the RFID technology, the radio frequency wiring (4) of the near-field antenna board based on the RFID technology is a connection line between the first-level radio frequency switch chip and the second-level radio frequency switch chip and a connection line between the second-level radio frequency switch chip and the antenna, the distances from the one-to-two radio frequency switch chip to the two one-to-six radio frequency switch chips are equal, and the distances from the one-to-six radio frequency switch chip to the antenna are equal.

A photoelectric switch (5) of the near-field antenna board based on the RFID technology is connected with the near-field antenna MCU (1) to sense whether an object is placed on the near-field antenna. Each antenna corresponds to a photoelectric switch, the existence state of an object in an antenna area is sensed, the object is analyzed and processed by the near-field antenna MCU (1), and the corresponding antenna is started to count. The photoelectric switch (5) is directly connected with the near-field antenna MCU (1) and is not connected with the antenna, the MCU receives the information of the photoelectric switch A, the MCU controls the corresponding antenna A, the MCU receives the information of the photoelectric switch B, and the MCU controls the corresponding antenna B.

The indicating lamp (6) of the near-field antenna board based on the RFID technology is controlled by the near-field antenna MCU (1), the near-field antenna MCU (1) analyzes a data protocol of a control module of an RFID product, and the state of the indicating lamp is controlled while the antenna is started to check.

And an RS485 interface (7) of the near field antenna board based on the RFID technology is a communication interface of the near field antenna board and a control module of an RFID product. The RS485 interface (7) is convenient to network, a near field antenna board based on the RFID technology is convenient to cascade, and the extension is convenient. 24 near field antennas are needed for one RFID product, the RFID product is directly connected with two near field antenna boards through an RS485 interface (7), 36 near field antennas are needed for one RFID product, and the RFID product is directly connected with three near field antenna boards through the RS485 interface (7).

And a radio frequency interface (8) of the near field antenna board based on the RFID technology is connected with the near field antenna board and a radio frequency interface of a control module of an RFID product, and an external antenna feeder line is directly connected with the first-stage radio frequency switch chip through the radio frequency interface. The radio frequency switch chip (2) and the near field antenna MCU (1) are matched with a control module of an RFID product to finish the counting work of the objects carrying the radio frequency tags.

According to the embodiment of the near field antenna plate based on the RFID technology, the embedded control software of the near field antenna MCU (1) of the near field antenna plate based on the RFID technology analyzes the data protocol of the control module of the RFID product and controls the near field antenna to work. The other function of the embedded control software of the near-field antenna MCU (1) is to control the photoelectric switch and the indicator light to work.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.