Multi-card reading module

Abstract

The utility model discloses a multi-card reading module. The multi-card reading module is characterized in that a main controller is connected with a non-contact intelligent card reading module; the output end of the identity card reading module and the output end of the non-contact intelligent card reading module are connected with the analog switch module. The output end of the analog switch module is connected with the filter circuit; the filter circuit is connected with the antenna through the matching circuit; the analog switch circuit is used for switching and selecting one path of received radio frequency signals of the non-contact intelligent card reading module and the identity card reading module according to an output signal of the main controller and outputting the radio frequency signals to the filtering module, and the identity card reading module and the main controller are connected with an upper computer; the input end of the first receiving circuit is connected to the output end of the filter circuit, and the output end of the first receiving circuit is connected with the input end of the identity card reading module; the input end of the second receiving circuit is connected to the output end of the filter circuit, and the output end of the second receiving circuit is connected with the input end of the non-contact intelligent card reading module. The reading module is small in size.

Description

Technical Field

[0001] This application relates to the field of IC card readers, and in particular to a multi-card reading module. Background Technology

[0002] In the healthcare field, with the continuous advancement of information technology, medical services are becoming increasingly convenient. Currently, many medical institutions support patient registration and management using ID cards and contactless IC cards (such as Mifare One cards or contactless CPU cards). This multi-card compatible system provides convenience for patients.

[0003] However, most current ID card readers only implement the function of reading and recognizing second-generation ID cards. Even some multi-card compatible reading systems typically use two antenna boards: one for setting up the ID card reading module and the other for setting up the IC card reading module. This results in a large area occupied by the card reader and a large overall module area for the card reader. Summary of the Invention

[0004] Based on this, and in response to the aforementioned technical problems, a multi-card reading module is provided to solve the problem of large module footprint in existing card readers.

[0005] In a first aspect, a multi-card reading module is provided, the module comprising: a main controller, an ID card reading module, a contactless smart card reading module, an analog switch module, a filtering circuit, a first receiving circuit, a second receiving circuit, a matching circuit, and an antenna;

[0006] The main controller is connected to the contactless smart card reader module; the output terminals of the ID card reader module and the contactless smart card reader module are respectively connected to the analog switch module; the output terminal of the analog switch module is connected to the filter circuit; the filter circuit is connected to the antenna through the matching circuit; the analog switch circuit is used to switch and select one of the radio frequency signals received from the contactless smart card reader module and the ID card reader module according to the output signal of the main controller and output it to the filter module.

[0007] The ID card reader module and the main controller are connected to a remote host computer.

[0008] The input terminal of the first receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the first receiving circuit is connected to the input terminal of the ID card reader module; the input terminal of the second receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the second receiving circuit is connected to the input terminal of the contactless smart card reader module.

[0009] Optionally, in the above scheme, the output terminals of the ID card reader module and the main controller are connected to a remote host computer through a serial port switching circuit.

[0010] In the above scheme, optionally, the serial port switching circuit includes: diode D1 and diode D3, and resistor R4;

[0011] The output terminal of the ID card reader module is connected to one end of diode D1, the output terminal of the main controller is connected to one end of diode D3, the other end of diode D1 and the other end of diode D3 are connected, and one end of resistor R4 is connected to the connection point of the other end of diode D1 and the other end of diode D3.

[0012] Optionally, in the above scheme, the ID card reader module includes a USB interface and a UART serial port, and communicates with the host computer through the USB interface and the UART serial port.

[0013] Optionally, in the above scheme, the main controller is an STM32F051.

[0014] Optionally, in the above scheme, the model of the analog switch module is TS5A23159.

[0015] Optionally, in the above scheme, the chip in the contactless smart card reader module is the FM17550.

[0016] This application has at least the following beneficial effects:

[0017] This application transmits radio frequency (RF) signals to an analog switch module via the RF chip in the ID card reader module or the RF chip in the contactless smart card reader module. The analog switch module then switches the card, and an antenna is connected via a filtering and matching circuit. The antenna acquires the corresponding information, which is then received and processed by a first or second receiving circuit. Therefore, the ID card reader module and the contactless smart card reader module share not only the same antenna coil but also the same RF matching and filtering circuits. This allows for the reading of both ID cards and IC cards (contactless smart cards) on a single antenna board, significantly reducing the reader's size. Attached Figure Description

[0018] Figure 1 A schematic diagram of the module framework of a multi-card reader module provided in one embodiment of this application;

[0019] Figure 2 A circuit schematic diagram of an ID card reader module is provided for one embodiment of this application;

[0020] Figure 3A circuit diagram of a chip for a contactless smart card reader module provided in one embodiment of this application;

[0021] Figure 4 A circuit schematic diagram of a main controller provided in one embodiment of this application;

[0022] Figure 5 A circuit schematic diagram of an analog switch provided in one embodiment of this application;

[0023] Figure 6 This is a PCB layout diagram of various modules in a motherboard provided in one embodiment of this application;

[0024] Figure 7 The circuit diagram is shown for a serial port switching circuit provided in one embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] In one embodiment, such as Figure 1 As shown, a multi-card reading module is provided, the module including: a main controller, an ID card reading module, a contactless smart card reading module, an analog switch module, a filtering circuit, a first receiving circuit, a second receiving circuit, a matching circuit, and an antenna;

[0027] The main controller is connected to the contactless smart card reader module; the output terminals of the ID card reader module and the contactless smart card reader module are respectively connected to the analog switch module; the output terminal of the analog switch module is connected to the filter circuit; the filter circuit is connected to the antenna through the matching circuit; the analog switch circuit is used to switch and select one of the radio frequency signals received from the contactless smart card reader module and the ID card reader module according to the output signal of the main controller and output it to the filter module.

[0028] The ID card reader module and the main controller are connected to a remote host computer.

[0029] The input terminal of the first receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the first receiving circuit is connected to the input terminal of the ID card reader module; the input terminal of the second receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the second receiving circuit is connected to the input terminal of the contactless smart card reader module.

[0030] Specifically, the ID card reader module uses a third-generation SAM module (a micro-module with a built-in radio frequency chip, providing both encrypted ID card decoding and radio frequency signal analysis functions) manufactured by a designated unit of the Ministry of Public Security. Figure 2 The diagram shown is the circuit schematic of SAM_A_III-R.

[0031] The contactless smart card reader module uses the FM17550 chip, providing card reading functionality for contactless smart cards conforming to the ISO 14443 TYPE A and TYPE B protocols. For example... Figure 3 The diagram shown is a circuit schematic of the chip in a contactless smart card reader module.

[0032] The main controller is an STM32F051. Figure 4 The circuit schematic of the main controller is shown.

[0033] The analog switch module uses an analog switch of model TS5A23159. For example... Figure 5 This is a circuit diagram simulating a switch.

[0034] Simultaneously, the main controller, ID card reader module, contactless smart card reader module, analog switch module, filtering circuit, first receiving circuit, and second receiving circuit are mounted on the motherboard, while the matching circuit and antenna are mounted on the antenna board. For example... Figure 6 The diagram shown is a PCB layout diagram of each module in the motherboard.

[0035] An analog switch is used to switch between two RF signals from an ID card reader module (SAM_A_III-R) and a contactless smart card reader module (FM17550). Placing the analog switch before the filtering circuit reduces the voltage withstand requirement for the analog switch chip. Therefore, the two RF chips (SAM_A_III-R and FM17550) not only share the same antenna coil but also the same RF matching and filtering circuits. Furthermore, the antenna coil and RF matching circuit are designed on a separate antenna board, allowing for easy motherboard adaptation to antenna boards of different sizes and shapes.

[0036] In the aforementioned multi-card reader module, the RF chip in the ID card reader module or the RF chip in the contactless smart card reader module sends an RF signal to the analog switch module. The analog switch module then switches the card. Simultaneously, an antenna is connected via a filtering circuit and a matching circuit to acquire the corresponding information. This information is then received and processed by either the first or second receiving circuit. Therefore, the ID card reader module and the contactless smart card reader module share not only the same antenna coil but also the same RF matching circuit and filtering circuit. This allows for the reading of both ID cards and IC cards (contactless smart cards) on a single antenna board, significantly reducing the reader's area.

[0037] In one embodiment, the output terminals of the ID card reader module and the main controller are connected to a remote host computer via a serial port switching circuit.

[0038] In one embodiment, such as Figure 7 As shown, the serial port switching circuit includes: diode D1 and diode D3, and resistor R4;

[0039] The output terminal of the ID card reader module is connected to one end of diode D1, the output terminal of the main controller is connected to one end of diode D3, the other end of diode D1 and the other end of diode D3 are connected, and one end of resistor R4 is connected to the connection point of the other end of diode D1 and the other end of diode D3.

[0040] In one embodiment, the ID card reader module includes a USB interface and a UART serial port, and communicates with a host computer through the USB interface and the UART serial port.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-card reading module, characterized in that, The module includes: a main controller, an ID card reader module, a contactless smart card reader module, an analog switch module, a filter circuit, a first receiving circuit, a second receiving circuit, a matching circuit, and an antenna; The main controller is connected to the contactless smart card reader module; the output terminals of the ID card reader module and the contactless smart card reader module are respectively connected to the analog switch module; the output terminal of the analog switch module is connected to the filter circuit; the filter circuit is connected to the antenna through the matching circuit; the analog switch module is used to switch and select one of the radio frequency signals received from the contactless smart card reader module and the ID card reader module according to the output signal of the main controller and output it to the filter circuit. The ID card reader module and the main controller are connected to a remote host computer. The input terminal of the first receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the first receiving circuit is connected to the input terminal of the ID card reader module; the input terminal of the second receiving circuit is connected to the connection line between the filtering circuit and the matching circuit, and the output terminal of the second receiving circuit is connected to the input terminal of the contactless smart card reader module.

2. The multi-card reading module according to claim 1, characterized in that, The output terminals of the ID card reader module and the main controller are connected to a remote host computer via a serial port switching circuit.

3. The multi-card reading module according to claim 2, characterized in that, The serial port switching circuit includes: diodes D1 and D3, and resistor R4; The output terminal of the ID card reader module is connected to one end of diode D1, the output terminal of the main controller is connected to one end of diode D3, the other end of diode D1 and the other end of diode D3 are connected, and one end of resistor R4 is connected to the connection point of the other end of diode D1 and the other end of diode D3.

4. The multi-card reading module according to claim 1, characterized in that, The ID card reader module includes a USB interface and a UART serial port, and communicates with the host computer through the USB interface and the UART serial port.

5. The multi-card reading module according to claim 1, characterized in that, The main controller is an STM32F051.

6. The multi-card reading module according to claim 1, characterized in that, The model number of the analog switch module is TS5A23159.

7. The multi-card reading module according to claim 1, characterized in that, The chip used in the contactless smart card reader module is the FM17550.

Images