2.4 G reader supporting multi-channel protocol

Abstract

The utility model discloses a 2.4 G reader supporting a multi-channel protocol, and solves the technical problems that a 2.4 G reader in the prior art cannot receive radio frequency signals of devices with different protocols in a compatible manner and is inflexible in application. Comprising a shell, a main control module, a wireless receiving and transmitting module, an attenuator and an antenna module are arranged in the shell, the main control module is connected with the wireless receiving and transmitting module, the wireless receiving and transmitting module is connected with the attenuator, and the attenuator is connected with the antenna module; the wireless transceiver module comprises at least two 2.4 G wireless transceiver chips. According to the utility model, the plurality of 2.4 G wireless transceiver chips with different protocols are arranged in the reader, so that one reader can receive 2.4 G chip signals of different devices for attendance recording, and meanwhile, the plurality of 2.4 G wireless transceiver chips share one set of antenna and attenuator, so that the cost is effectively reduced, and the problem of signal interference among a plurality of antennas is avoided. The reader can be widely applied to the technical field of readers.

Description

Technical Field

[0001] The utility model relates to the technical field of readers, in particular to a 2.4G reader supporting multi-channel protocols. Background Art

[0002] Traditional attendance methods generally rely on manual records, which not only waste manpower and time but also easily lead to chaos or recording errors. With the development of technology, 2.4G radio frequency technology has been applied to attendance. By setting 2.4G chips in devices capable of performing attendance, manpower and material resources are effectively saved, and the accuracy of attendance records is improved. However, as more and more devices can be used for attendance, the radio frequency frequencies of the 2.4G chips set in different devices are different. Generally, a 2.4G reader can only receive radio frequency signals of a fixed frequency point. To adapt to multiple different devices, multiple readers need to be set up at the attendance location, which not only increases the attendance cost but also causes signal interference between the antennas of different readers, thus affecting the attendance effect. Summary of the Invention

[0003] Aiming at the disadvantages and deficiencies existing in the prior art, the utility model provides a 2.4G reader supporting multi-channel protocols. By setting multiple 2.4G wireless transceiver chips with different protocols in the reader, it is realized that one reader can receive the 2.4G chip signals of different devices for attendance records. At the same time, multiple 2.4G wireless transceiver chips share a set of antennas and attenuators, effectively reducing costs and avoiding the problem of signal interference between multiple antennas.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0005] The present application provides a 2.4G reader supporting multi-channel protocols, including a housing. A main control module, a wireless transceiver module, an attenuator, and an antenna module are arranged in the housing. The main control module is connected to the wireless transceiver module, the wireless transceiver module is connected to the attenuator, and the attenuator is connected to the antenna module;

[0006] The wireless transceiver module includes at least 2 2.4G wireless transceiver chips.

[0007] Preferably, the model of the main control module is GD32F450. The 2.4G wireless transceiver chips are respectively connected to the main control module through SPI interfaces, and the main control module configures the parameters of the 2.4G wireless transceiver chips on different channels through the SPI interfaces.

[0008] Preferably, the model of the attenuator is HMC274. The attenuator is respectively connected to the 2.4G wireless transceiver chips through antenna matching circuits.

[0009] Preferably, the GPIO pin of the main control module is connected to the control level pin of the attenuator.

[0010] Preferably, the housing includes an upper housing and a lower housing, and the antenna module is integrated with the upper housing.

[0011] Preferably, a radio frequency antenna base connected to the antenna module is provided inside the lower housing, and the radio frequency antenna base is connected to the attenuator.

[0012] Preferably, the main control module is connected with a 485 interface module and a 4G communication module.

[0013] Preferably, a memory connected to the main control module is further included.

[0014] Preferably, the lower housing is a signal shielding housing.

[0015] The utility model has the following beneficial effects:

[0016] The 2.4G reader of the utility model, by arranging a plurality of 2.4G wireless transceiver chips connected to the main control module in the reader, and performing different parameter configurations on the 2.4G wireless transceiver chips through the main control module, enables the reader to have multiple 2.4G wireless transceiver chips with different communication protocols at the same time, realizes that one reader can receive the 2.4G chip signals of different devices for attendance records, effectively improves the application range of the reader, and improves the attendance efficiency. At the same time, a plurality of 2.4G wireless transceiver chips share a set of antenna module and attenuator, effectively reducing the cost and avoiding the problem of signal interference between multiple antennas. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the frame structure of the 2.4G reader shown in the embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the circuit structure of the attenuator of the 2.4G reader shown in the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the circuit structure of the wireless transceiver chip of the 2.4G reader shown in the embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the circuit structure of the main control module of the 2.4G reader shown in the embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the connection structure between the antenna module and the attenuator of the 2.4G reader shown in the embodiment of the utility model.

[0022] In the figure: 1, main control module; 2, wireless transceiver module; 3, attenuator; 4, antenna module; 5, RF antenna base; 6, 4G communication module; 7, 485 interface module. Detailed implementation

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment

[0025] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0026] The present invention provides a 2.4G reader supporting multi-channel protocols, including a housing. Inside the housing, there are a main control module 1, a wireless transceiver module 2, an attenuator 3, and an antenna module 4. The main control module 1 is connected to the wireless transceiver module 2, the wireless transceiver module 2 is connected to the attenuator 3, and the attenuator 3 is connected to the antenna module 4;

[0027] The wireless transceiver module 2 includes at least 2 2.4G wireless transceiver chips.

[0028] In the embodiments of the present application, by setting multiple 2.4G wireless transceiver chips connected to the main control module 1 through different protocols in the 2.4G reader, it is realized that one reader can receive the 2.4G chip signals of different devices for attendance records, improving the application range of the reader. At the same time, multiple 2.4G wireless transceiver chips share a set of antenna module 4 and attenuator 3, effectively reducing costs and avoiding the problem of signal interference between multiple antennas.

[0029] Furthermore, the model of the main control module 1 is GD32F450. The 2.4G wireless transceiver chips are respectively connected to the main control module 1 through SPI interfaces, and the main control module 1 configures the parameters of the 2.4G wireless transceiver chips on different channels through the SPI interfaces.

[0030] In the embodiments of the present application, the number of the 2.4G wireless transceiver chips is 4.

[0031] The main control module 1 can configure the parameters of the 2.4G wireless transceiver chips of different channels through the SPI interface, and further realize the synchronous parsing of multiple card protocols. The main control module 1 can set the parameters of each channel according to the requirements of the communication protocol, such as setting the operating frequency point, transmission rate and other parameters of the 2.4G wireless receiving chip. For example, the main control module 1 can set the frequency point of U1 (the first 2.4G wireless transceiver chip) to 2480 and the transmission rate to 1Mbps through the SPI1 channel, and set the frequency point of U2 (the second 2.4G wireless transceiver chip) to 2484 and the transmission rate to 2Mbps through the SPI2 channel, and so on. By setting different parameter configurations for 4 2.4G wireless transceiver chips, it is possible to adapt to devices with different communication protocols to receive attendance data.

[0032] Such as Figure 3 As shown, in some specific embodiments, the model of the 2.4G wireless transceiver chip is SI24R1. PIN12 (RFP) and PIN13 (RFN) of the 2.4G wireless transceiver chip are antenna receiving pins, which are connected to the ANI_IN pin of the attenuator for parsing the radio frequency signal transmitted from the attenuator. The PIN11 (VDD_PA) pin provides power supply for the RF circuit. PIN9 (VSS) and PIN11 (XI) are crystal oscillator pins, which provide 16M clock data for the 2.4G wireless transceiver chip. PIN7 (VCC), PIN15 (VCC), and PIN18 (VCC) are power input pins, and the input voltage is set to 3.3V. Filter capacitors are added to the pins to remove interference, and the filter capacitors are placed close to the chip pins during design.

[0033] PIN1, PIN2, PIN3, PIN4, PIN5 (1CE, 1CSN, 1SCK, 1MOSI, 1MISO) are the SPI communication pins of the 2.4G wireless transceiver chip, which are respectively connected to the PB7, PA15, PA5, PA6, and PA7 pins of the main control module 1.

[0034] PIN6 (IRQ) is an interrupt pin, which is connected to the PA3 pin of the main control module 1. When the 2.4G wireless transceiver chip receives data, it is used to notify the main control module 1 to enter the data parsing mode.

[0035] The model of the attenuator 3 is HMC274, and the attenuator 3 is respectively connected to the 2.4G wireless transceiver chip through an antenna matching circuit.

[0036] The GPIO pin of the main control module 1 is connected to the control level pin of the attenuator 3.

[0037] The housing includes an upper housing and a lower housing, and the antenna module 4 is integrated with the upper housing.

[0038] A radio frequency antenna base 5 connected to the antenna module 4 is provided inside the lower housing, and the radio frequency antenna base 5 is connected to the attenuator 3.

[0039] Specifically, as Figure 2 shown, PIN3, PIN4, PIN5, PIN6, and PIN7 of the attenuator 3 are control level pins, which are connected to the GPIO pins of the main control module 1 through 100R resistors. The main control module 1 controls the reception sensitivity parameters of the attenuator 3 through the states of the GPIO.

[0040] PIN9 (RF2) is a signal output pin, and ANT_IN is input into the 2.4G wireless transceiver chip through capacitive AC coupling.

[0041] PIN16 (RF1) is a signal input pin. PIN16 (RF1) is connected to the radio frequency antenna base 5 through C18, matching inductor L4, matching capacitors C10 and C34, and the radio frequency antenna base 5 is connected to the antenna module 4. In this application, multiple 2.4G wireless transceiver chip channels share one attenuator 3 and antenna module 4, which not only avoids signal interference between multiple antennas but also saves the space and cost of configuring multiple antennas.

[0042] The main control module 1 is connected to a 485 interface module 7 and a 4G communication module 6. After receiving signal data, the main control module 1 comprehensively processes multiple pieces of information and sends the aggregated information to the upper computer through the 485 interface module 7 or the 4G communication module 6 to generate attendance records.

[0043] It further includes a memory connected to the main control module 1 for storing received data information.

[0044] The lower housing is a signal shielding housing.

[0045] In the embodiment of this application, the lower housing is made of a metal material with signal reflection function, such as copper or aluminum. By setting the lower housing as a shielding housing, the receiving direction of the signal is made a single direction to distinguish between entering and leaving the school.

[0046] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0048] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0049] The above is only the preferred specific implementation mode of the present utility model, and the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A 2.4G reader supporting multi-channel protocol, characterized in that: The invention comprises a shell, wherein a main control module (1), a wireless transceiver module (2), an attenuator (3) and an antenna module (4) are arranged in the shell, wherein the main control module (1) is connected to the wireless transceiver module (2), the wireless transceiver module (2) is connected to the attenuator (3), and the attenuator (3) is connected to the antenna module (4); The wireless transceiver module (2) comprises at least two 2.4G wireless transceiver chips.

2. The 2.4G reader supporting multi-channel protocol according to claim 1, characterized in that: The main control module (1) is of model GD32F450, and the 2.4G wireless transceiver chips are connected to the main control module (1) via SPI interfaces respectively. The main control module (1) performs parameter configuration on the 2.4G wireless transceiver chips of different channels via the SPI interfaces.

3. The 2.4G reader supporting multi-channel protocol according to claim 1, characterized in that: The attenuator (3) is of model HMC274, and the attenuator (3) is connected to the 2.4G wireless transceiver chip via an antenna matching circuit.

4. The 2.4G reader supporting multi-channel protocol according to claim 3, characterized in that: The GPIO pin of the main control module (1) is connected to the control level pin of the attenuator (3).

5. The 2.4G reader supporting multi-channel protocol according to claim 1, characterized in that: The shell comprises an upper shell and a lower shell, and the antenna module (4) is integrated with the upper shell.

6. The 2.4G reader supporting multi-channel protocol according to claim 5, characterized in that: A radio frequency antenna seat (5) connected to the antenna module (4) is provided in the lower housing, and the radio frequency antenna seat (5) is connected to the attenuator (3).

7. The 2.4G reader supporting multi-channel protocol according to claim 2, characterized in that: The main control module (1) is connected to a 485 interface module (7) and a 4G communication module (6).

8. The 2.4G reader supporting multi-channel protocol according to claim 1, characterized in that: It also includes a memory connected to the main control module (1).

9. The 2.4G reader supporting multi-channel protocol according to claim 5, characterized in that: The lower shell is a signal shielding shell.

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