Electronic student card supporting digital RMB hard wallet

Abstract

The utility model relates to an electronic student card supporting a digital RMB hard wallet, belongs to the technical field of electronic student cards, and solves the problem that the electronic student card in the prior art does not support the payment function of the digital RMB hard wallet. The electronic student card comprises a shell, a main processor and a safety payment circuit, wherein the main processor and the safety payment circuit are arranged on the inner wall of the shell; the main processor and the safety payment circuit are connected through an I2C bus; the safety payment circuit comprises a safety chip, a CLF front-end chip, an antenna power taking circuit and an NFC antenna. One end of the antenna power-taking circuit is connected with the NFC antenna, the other end of the antenna power-taking circuit is connected with the CLF front-end chip, and the CLF front-end chip is electrically connected with the security chip; and the security chip is electrically connected with the main processor. The high-performance electronic student card supporting the digital RMB hard wallet is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic student cards, and in particular to an electronic student card supporting a digital RMB hard wallet. Background Art

[0002] The electronic student card supports the family call function. Parents can set the family number, emergency contact, and whitelist phone number of the electronic student card. Only the contacts in the call whitelist can make calls, so that children are not harassed and escort two-way calls; and in case of emergency, SOS can be triggered to dial for help with one button; it supports positioning function to solve the safety problem of children on the way to and from school. Parents can know the location of their children through the APP anytime and anywhere; guardians and schools can set up electronic fences for designated areas, and children will be issued warning information as soon as they enter and exit the area; it supports the non-sensing attendance function, supports 2.4G and 13.56M RFID attendance, supports the expansion of the original campus attendance equipment, and automatically sends safety notifications to parents' mobile phones when children enter and leave the school gate, as well as other classroom interaction, emergency assistance, and health reminder functions. Electronic student cards are gradually entering campuses and becoming an essential tool for children's campus life and learning.

[0003] The electronic student card does not support the digital RMB hard wallet payment function, which is inconvenient for students to use. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide an electronic student card that supports a digital RMB hard wallet, so as to solve the problem that existing electronic student cards do not support the digital RMB hard wallet payment function.

[0005] The purpose of the utility model is mainly achieved through the following technical solutions: an electronic student card supporting a digital RMB hard wallet, comprising a shell, a main processor and a secure payment circuit, wherein the main processor and the secure payment circuit are arranged on the inner wall of the shell; the main processor and the secure payment circuit are connected via an I2C bus;

[0006] The secure payment circuit includes a security chip, a CLF front-end chip, an antenna power circuit and an NFC antenna;

[0007] One end of the antenna power circuit is connected to the NFC antenna, and the other end is connected to the CLF front-end chip. The CLF front-end chip is electrically connected to the security chip; the security chip is electrically connected to the main processor.

[0008] Based on the further improvement of the above solution, the antenna power supply circuit includes a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor;

[0009] The drain of the first field effect transistor is connected to the drain of the second field effect transistor;

[0010] The source of the first field effect transistor is connected to the drain of the third field effect transistor;

[0011] The source of the second field effect transistor is connected to the drain of the fourth field effect transistor;

[0012] The source of the third field effect transistor is connected to the source of the fourth field effect transistor.

[0013] Based on a further improvement of the above solution, two pins of the NFC antenna are respectively connected to the source of the first field effect transistor and the source of the second field effect transistor.

[0014] Based on the further improvement of the above solution, the drain of the first field effect transistor is connected to the power pin of the CLF front-end chip; the source of the third field effect transistor is connected to the ground pin of the CLF front-end chip.

[0015] Based on the further improvement of the above solution, a first parasitic diode is connected to the first field effect transistor; the anode of the first parasitic diode is connected to the source of the first field effect transistor, and the cathode of the first parasitic diode is connected to the drain of the first field effect transistor;

[0016] A second parasitic diode is connected to the second field effect transistor; an anode of the second parasitic diode is connected to the source of the second field effect transistor, and a cathode of the second parasitic diode is connected to the drain of the second field effect transistor;

[0017] The third field effect tube is connected to a third parasitic diode; the anode of the third parasitic diode is connected to the source of the third field effect tube, and the cathode of the third parasitic diode is connected to the drain of the third field effect tube;

[0018] The fourth field effect transistor is connected to a fourth parasitic diode; the anode of the fourth parasitic diode is connected to the source of the fourth field effect transistor, and the cathode of the fourth parasitic diode is connected to the drain of the fourth field effect transistor.

[0019] Based on further improvement of the above solution, the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor are all N-channel enhancement type field effect transistors.

[0020] Based on the further improvement of the above solution, the electronic student card also includes a positioning module; the positioning module is connected to the main processor using a UART bus.

[0021] Based on the further improvement of the above solution, the electronic student card also includes an RFID radio frequency circuit; the RFID radio frequency circuit is connected to the main processor using an SPI bus.

[0022] Based on the further improvement of the above solution, the electronic student card also includes a display screen, which is connected to the main processor using an SPI bus, and the display screen is arranged on the front side of the housing.

[0023] Based on the further improvement of the above solution, the electronic student card also includes an input button, which is connected to the main processor using an I2C bus, and the input button is arranged at the lower part of the front side of the shell.

[0024] Compared with the prior art, the electronic student card supporting the digital RMB hard wallet provided in this embodiment supports digital RMB hard wallet payment by setting a secure payment circuit in the student card and connecting it to the main processor in the card; the NFC electromagnetic field is sensed by the NFC antenna, and the power supply rectification processing of the NFC antenna is performed through the antenna power taking circuit to obtain current to power the CLF front-end chip, and the NFC communication is enhanced by connecting the CLF front-end chip to the security chip, thereby improving the performance of NFC payment. In the present utility model, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the utility model will be explained in the subsequent content, and some advantages may become obvious from the specification, or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the text and the contents specifically pointed out in the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0026] Figure 1 This is a structural block diagram of an electronic student card that supports a digital RMB hard wallet according to an embodiment of the utility model;

[0027] Figure 2 A circuit diagram of an antenna power supply circuit according to an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of an electronic student card according to an embodiment of the utility model;

[0029] Reference numerals:

[0030] 1-housing; 2-speaker; 3-display screen; 4-button; 5-pickup, 6-secure payment circuit. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0032] A specific embodiment of the utility model discloses an electronic student card that supports a digital RMB hard wallet, such as Figure 1 As shown, it includes a housing, a main processor and a secure payment circuit, wherein the secure payment circuit is arranged on the inner wall of the housing; the main processor and the secure payment circuit are connected via an I2C bus;

[0033] The secure payment circuit includes a security chip, a CLF front-end chip, an antenna power circuit and an NFC antenna;

[0034] One end of the antenna power circuit is connected to the NFC antenna, and the other end is connected to the CLF front-end chip. The CLF front-end chip is electrically connected to the security chip; the security chip is electrically connected to the main processor.

[0035] Compared with the prior art, the electronic student card supporting the digital RMB hard wallet provided in this embodiment supports digital RMB hard wallet payment by setting a secure payment circuit in the student card and connecting it to the main processor in the card; the NFC electromagnetic field is sensed by the NFC antenna, and the power rectification processing of the NFC antenna is performed through the antenna power taking circuit to obtain current to power the CLF front-end chip, and the NFC communication is enhanced by connecting the CLF front-end chip to the security chip, thereby improving the performance of NFC payment.

[0036] During implementation, the security chip is a security chip that supports contactless functions. The LA and LB interfaces of the CLF front-end chip are connected to the LA and LB interfaces of the security chip, that is, the antenna pin of the CLF front-end chip is connected to the antenna pin of the security chip.

[0037] It should be noted that the payment function involved in the SE security chip in the above embodiment is a common method in the prior art, such as integrating the existing payment method into the SE security chip, and the present utility model does not involve any software improvement.

[0038] Specifically, Figure 2 As shown, the antenna power supply circuit includes a first field effect transistor Q1, a second field effect transistor Q1, a third field effect transistor Q1 and a fourth field effect transistor Q1;

[0039] The drain of the first field effect transistor Q1 is connected to the drain of the second field effect transistor Q2;

[0040] The source of the first field effect transistor Q1 is connected to the drain of the third field effect transistor Q3;

[0041] The source of the second field effect transistor Q2 is connected to the drain of the fourth field effect transistor Q4;

[0042] The source of the third field effect transistor Q3 is connected to the source of the fourth field effect transistor Q4.

[0043] The gates of the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor are suspended or grounded through a protection resistor.

[0044] During implementation, two pins of the NFC antenna are respectively connected to the source of the first field effect transistor and the source of the second field effect transistor.

[0045] The full-bridge rectification efficiency is made higher by using field effect transistors.

[0046] The antenna power supply circuit is used to power the CLF front-end chip. During implementation, the drain of the first field effect transistor is connected to the power pin of the CLF front-end chip; the source of the third field effect transistor is connected to the ground pin of the CLF front-end chip.

[0047] In order to protect the field effect tube and improve the circuit performance, the first field effect tube is connected with a first parasitic diode; the anode of the first parasitic diode is connected to the source of the first field effect tube, and the cathode of the first parasitic diode is connected to the drain of the first field effect tube;

[0048] A second parasitic diode is connected to the second field effect transistor; an anode of the second parasitic diode is connected to the source of the second field effect transistor, and a cathode of the second parasitic diode is connected to the drain of the second field effect transistor;

[0049] The third field effect tube is connected to a third parasitic diode; the anode of the third parasitic diode is connected to the source of the third field effect tube, and the cathode of the third parasitic diode is connected to the drain of the third field effect tube;

[0050] The fourth field effect transistor is connected to a fourth parasitic diode; the anode of the fourth parasitic diode is connected to the source of the fourth field effect transistor, and the cathode of the fourth parasitic diode is connected to the drain of the fourth field effect transistor.

[0051] Parasitic diodes are connected to the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor to avoid breakdown of the field effect transistor, thereby protecting the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor.

[0052] During implementation, the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor are all N-channel enhancement type field effect transistors.

[0053] During implementation, in order to facilitate students to clock in for attendance over the air, the electronic student card also includes an RFID radio frequency circuit; the RFID radio frequency circuit is connected to the main processor using an SPI bus.

[0054] During implementation, the RFID radio frequency circuit may be a 2.4G RFID radio frequency circuit.

[0055] During implementation, in order to facilitate the location of the student, the electronic student card also includes a positioning module; the positioning module is connected to the main processor using a UART bus.

[0056] During implementation, the positioning module can use GPS positioning, BDS positioning, GLONASS positioning, Galileo positioning or QZSS positioning. The positioning module sends the positioning information to the main processor, and the main processor obtains the positioning information of the positioning module and sends it to the parent's APP, so that the parent can know the child's location at any time.

[0057] During implementation, in order to facilitate students to view their attendance and payment information, the electronic student card also includes a display screen, which is connected to the main processor using an SPI bus and is arranged on the front of the housing.

[0058] The SE security chip sends the payment information to the main processor, which sends the payment information to the display screen for display. The RFID radio frequency circuit sends the attendance information to the main processor, which sends the attendance information to the display screen for display.

[0059] During implementation, the electronic student card also includes a SIM module, and the SIM module is connected to the main processor using a UART bus to realize the networking communication function of the electronic student card.

[0060] The electronic student card also includes a voice module, which is connected to the main processor using the SPI center. The main processor sends attendance information, payment information, and call voice to the voice module. The speaker of the voice module broadcasts the information, and the microphone of the voice module collects the student's voice information and sends it to the main processor to realize voice calls.

[0061] It should be noted that the voice module is an existing technology, and the voice data collection, sending and playing functions of the existing voice module can be run in the voice module. The utility model does not involve any software improvements.

[0062] For easy operation, the electronic student card also includes an input button, which is connected to the main processor using an I2C bus and is arranged at the lower part of the front of the housing. During implementation, the button can be an acrylic button. The button is arranged below the display screen.

[0063] During implementation, students can select the current function of the student card by key input, for example, entering the payment function by key selection.

[0064] When implemented, the electronic student card can be Figure 3As shown, the speaker 2 of the voice module is arranged above the front of the shell, the pickup is arranged below the shell, the display screen is arranged above the front of the shell for easy viewing, and the button 4 is arranged below the display screen. When the payment function needs to be used, the payment interface is entered by pressing the button, the main processor reads the wallet information in the secure payment circuit, and then generates a QR code pattern for payment, which is displayed on the display screen for merchants to scan and collect payment; at the same time, the main processor queries the transaction information of the bound digital RMB account through the communication module; after the merchant completes the deduction, the main processor sends the payment information to the display screen for display, so that the user can view the payment amount

[0065] Those skilled in the art can understand that the main processor involved in the above-mentioned embodiments of the wallet information of the secure payment circuit to generate a QR code pattern, query the digital RMB account transaction information and data forwarding processing program is a common method in the prior art, such as the existing wallet information of the secure payment circuit to generate a QR code pattern, query the digital RMB account transaction information and data forwarding processing method is run in the main processor, and the utility model does not involve any software improvements. The utility model only needs to connect each device with corresponding functions through the connection relationship given in the embodiment of the utility model, which does not involve any program software improvements. As for the connection method between the hardware devices of each corresponding function, it can be achieved by those skilled in the art using the existing technology, and will not be described in detail here.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic student card that supports a digital RMB hard wallet, characterized in that: It includes a housing, a main processor and a secure payment circuit, wherein the main processor and the secure payment circuit are arranged on the inner wall of the housing; the main processor and the secure payment circuit are connected via an I2C bus; The secure payment circuit includes a security chip, a CLF front-end chip, an antenna power circuit and an NFC antenna; One end of the antenna power circuit is connected to the NFC antenna, and the other end is connected to the CLF front-end chip. The CLF front-end chip is electrically connected to the security chip; the security chip is electrically connected to the main processor.

2. The electronic student card supporting the digital RMB hard wallet according to claim 1 is characterized in that: The antenna power supply circuit includes a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor; The drain of the first field effect transistor is connected to the drain of the second field effect transistor; The source of the first field effect transistor is connected to the drain of the third field effect transistor; The source of the second field effect transistor is connected to the drain of the fourth field effect transistor; The source of the third field effect transistor is connected to the source of the fourth field effect transistor.

3. The electronic student card supporting the digital RMB hard wallet according to claim 2 is characterized in that: The two pins of the NFC antenna are respectively connected to the source of the first field effect transistor and the source of the second field effect transistor.

4. The electronic student card supporting the digital RMB hard wallet according to claim 2 is characterized in that: The drain of the first field effect transistor is connected to the power pin of the CLF front-end chip; the source of the third field effect transistor is connected to the ground pin of the CLF front-end chip.

5. The electronic student card supporting the digital RMB hard wallet according to claim 2 is characterized in that: A first parasitic diode is connected to the first field effect transistor; an anode of the first parasitic diode is connected to a source of the first field effect transistor, and a cathode of the first parasitic diode is connected to a drain of the first field effect transistor; A second parasitic diode is connected to the second field effect transistor; an anode of the second parasitic diode is connected to the source of the second field effect transistor, and a cathode of the second parasitic diode is connected to the drain of the second field effect transistor; The third field effect tube is connected to a third parasitic diode; the anode of the third parasitic diode is connected to the source of the third field effect tube, and the cathode of the third parasitic diode is connected to the drain of the third field effect tube; The fourth field effect transistor is connected to a fourth parasitic diode; the anode of the fourth parasitic diode is connected to the source of the fourth field effect transistor, and the cathode of the fourth parasitic diode is connected to the drain of the fourth field effect transistor.

6. The electronic student card supporting the digital RMB hard wallet according to claim 2 is characterized in that: The first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor are all N-channel enhancement type field effect transistors.

7. The electronic student card supporting the digital RMB hard wallet according to claim 1 is characterized in that: The electronic student card also includes a positioning module; the positioning module is connected to the main processor using a UART bus.

8. The electronic student card supporting the digital RMB hard wallet according to claim 1 is characterized in that: The electronic student card also includes an RFID radio frequency circuit; the RFID radio frequency circuit is connected to the main processor using an SPI bus.

9. The electronic student card supporting the digital RMB hard wallet according to claim 1, characterized in that: The electronic student card also includes a display screen, which is connected to the main processor using an SPI bus and is arranged on the front side of the housing.

10. The electronic student card supporting the digital RMB hard wallet according to claim 1, characterized in that: The electronic student card also includes an input button, which is connected to the main processor using an I2C bus and is arranged at the lower part of the front side of the housing.

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