CN214504481U

CN214504481U - Entrance guard device for realizing quick card number reading

Info

Publication number: CN214504481U
Application number: CN202120354498.7U
Authority: CN
Inventors: 林志; 沈小惠; 朱雯婧
Original assignee: Jiangsu Aerospace Dawei Technology Co Ltd
Current assignee: Jiangsu Aerospace Dawei Technology Co Ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-10-26
Anticipated expiration: 2031-02-08

Abstract

The utility model discloses an entrance guard's device that quick card number read relates to the entrance guard field, include: the main control module, a memory module, read head module and gate control module, the main control module is connected to the read head module respectively, gate control module and memory module, the read head module includes the read head chip, read head antenna coil and card number reading circuit, the read head chip is connected to read head antenna coil through card number reading circuit, read head antenna coil includes three information output, card number reading circuit includes two inductances, a plurality of electric capacity and a plurality of resistance, read head antenna coil's transmission information can be acquireed fast by the read head chip, the problem that current entrance guard device structure is complicated has been solved, can guarantee through simple electronic components that also can realize entrance guard device's reliable use when personnel's discrepancy volume is great, entrance guard device's normal operating has been realized.

Description

Entrance guard device for realizing quick card number reading

Technical Field

The utility model belongs to the technical field of entrance guard's field and specifically relates to an entrance guard's device of punching card based on cryptograph.

Background

The door control device is a device for realizing automatic management of door locks, integrates management and automatic control, and is widely applied to door control, attendance management and security systems in intelligent buildings, community communities and other places.

The card number is used as the only element for authority verification through a radio frequency access control card in the prior access control device, the circuit structure of the device is complex, so that the problem of slow identification speed is brought, meanwhile, the population of a community and an industrial area is numerous, and particularly during the rush hour of work and work, the flow of people at an access is large, so that the access control device is difficult to load, the access control device cannot acquire related access information quickly, the safety cannot be guaranteed, and the actual effect of convenient access of the access control device is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

The inventor provides a card entrance guard's device of punching based on cryptograph to above-mentioned problem and technical demand, the technical scheme of the utility model as follows:

an entrance guard's device that realizes quick card number reading includes: the reading head chip is connected with the main control module, the reading head chip is connected to the reading head antenna coil through the card number reading circuit, the reading head antenna coil comprises three information output ends, the card number reading circuit comprises two inductors, a plurality of capacitors and a plurality of resistors, the first information output end is connected to one end of the first capacitor and one end of the second capacitor through the first resistor, the other end of the second capacitor is connected to one end of the third capacitor and one end of the first inductor, and the other end of the first inductor is connected to the first signal end of the reading head chip;

the second information output end is connected to a third signal end of the reading head chip through a second resistor, the third signal end of the reading head chip is further connected with a common end of the first inductor and the second inductor through a third capacitor, the third signal end of the reading head chip is further connected with a common end of the second inductor and a sixth capacitor through a fifth capacitor, the third signal end of the reading head chip is further connected with a common end of the second capacitor and the first resistor through the first inductor, and the third signal end of the reading head chip is further connected with a common end of the sixth capacitor and the third resistor through a fourth capacitor;

a third information output terminal is connected to the other end of the fourth capacitor, one end of the sixth capacitor, and one end of a seventh capacitor through the third resistor, the other end of the sixth capacitor is connected to the other end of the fifth capacitor and one end of the second inductor, the other end of the second inductor is connected to the fourth signal terminal of the read head chip, the other end of the seventh capacitor is connected to one end of a fifth resistor and the fifth signal terminal of the read head chip through the fourth resistor, the other end of the fifth resistor is connected to the sixth signal terminal of the read head chip and one end of an eighth capacitor, and the other end of the eighth capacitor is grounded.

According to a further technical scheme, the reading head module further comprises a clock frequency circuit, the clock frequency circuit comprises a crystal oscillator and two capacitors, a clock output signal end of the reading head chip is connected to one end of a ninth capacitor and a first input end of the crystal oscillator, a first output end of the crystal oscillator is connected to a clock input signal end of the reading head chip and one end of a tenth capacitor, and the other end of the ninth capacitor, the other end of the tenth capacitor, a second input end of the crystal oscillator and a second output end of the crystal oscillator are connected to the ground.

The access control device further comprises a ciphertext module, wherein the main control module is connected to the ciphertext module, and the ciphertext module is constructed based on a ciphertext chip with the model number of ATSHA 204A.

The device further comprises a buzzer driving circuit, the main control module is connected to the buzzer driving circuit, and the buzzer driving circuit is used for being connected to an external buzzer.

The further technical scheme is that the reading head chip adopts a non-contact communication chip working under 13.56 MHz.

The further technical scheme is that the model of the reading head chip is FM 17550.

The utility model has the beneficial technical effects that: the problem that the existing access control device is complex in structure is solved, and the reliable use of the access control device can be guaranteed when the personnel access amount is large through simple electronic components; the ciphertext module can encrypt the card number information, so that data is prevented from being stolen by lawbreakers, and the privacy of a user is further protected; alarm information can be output to external alarm equipment through the output module.

Drawings

Fig. 1 is a schematic structural diagram of the access control device of the present application.

FIG. 2 is a circuit schematic of a read head module of the present application.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

An entrance guard device for realizing fast card number reading, as shown in fig. 1, comprises: the main control module is connected to the reading head module, the gate control module and the storage module respectively, the main control module realizes operation management of the whole device, the main control module acquires card number information of the access control card through the reading head module and stores related information through the storage module, follow-up managers can conveniently check the access information of people, and the main control module controls opening and closing of the door lock through the gate control module.

As shown in fig. 2, the reader module includes a reader chip, a reader antenna coil, and a card number reading circuit, the reader chip is connected to the reader antenna coil through the card number reading circuit, the reader chip employs a non-contact communication chip operating at 13.56MHz, and further, the model of the reader chip is FM 17550.

The reading head antenna coil comprises three information output terminals X1, X2 and X3, the card number reading circuit comprises two inductors, a plurality of capacitors and a plurality of resistors, the first information output terminal X1 is connected to one end of a first capacitor C1 and one end of a second capacitor C2 through a first resistor R1, the other end of the second capacitor C2 is connected to one end of a third capacitor C3 and one end of a first inductor L1, and the other end of the first inductor L1 is connected to a first signal terminal TX1 of the reading head chip.

The second information output terminal X2 is connected to a third signal terminal TVSS2 of the read head chip through a second resistor R2, the third signal terminal TVSS2 of the read head chip is further connected to a common terminal of a first inductor L1 and a second capacitor C2 through a third capacitor C3, the third signal terminal TVSS2 of the read head chip is further connected to a common terminal of a second inductor L2 and a sixth capacitor C6 through a fifth capacitor C5, the third signal terminal TVSS2 of the read head chip is further connected to a common terminal of a second capacitor C2 and a first resistor R1 through a first capacitor C1, and the third signal terminal TVSS2 of the read head chip is further connected to a common terminal of a sixth capacitor C6 and a third resistor R3 through a fourth capacitor C4.

The second information output terminal X2 is connected to the other end of the first capacitor C1, one end of the third capacitor C3, one end of the fourth capacitor C4, one end of the fifth capacitor C5, ground, the second signal terminal TVSS1 of the read head chip, and the third signal terminal TVSS2 of the read head chip through a second resistor R2.

The third information output end X3 is connected to the other end of the fourth capacitor C4, one end of the sixth capacitor C6 and one end of the seventh capacitor C7 through the third resistor R3, the other end of the sixth capacitor C6 is connected to the other end of the fifth capacitor C5 and one end of the second inductor L2, the other end of the second inductor L2 is connected to the fourth signal terminal TX2 of the read head chip, the other end of the seventh capacitor C7 is connected to one end of the fifth resistor R5 and the fifth signal terminal RX of the read head chip through the fourth resistor R4, the other end of the fifth resistor R5 is connected to the sixth signal terminal VMID of the read head chip and one end of the eighth capacitor C8, the other end of the eighth capacitor C8 is grounded, fast reading of the door control card number can be realized through a small number of electronic components, and normal operation of the door control device is ensured.

The read head module further includes a clock frequency circuit including a crystal oscillator Y and two capacitors, a clock output signal terminal OSCOUT of the read head chip is connected to one end of a ninth capacitor C9 and a first input terminal I1 of the crystal oscillator Y, a first output terminal O1 of the crystal oscillator is connected to one end of a clock input signal terminal OSCIN of the read head chip and one end of a tenth capacitor C10, and the other end of the ninth capacitor C9, the other end of the tenth capacitor C10, a second input terminal I2 of the crystal oscillator Y and a second output terminal O2 of the crystal oscillator are connected to ground.

Furthermore, the gate control device further comprises a ciphertext module, the main control module is connected to the ciphertext module, the ciphertext module comprises a ciphertext chip, the ciphertext chip adopts an ATSHA204A chip, the ATSHA204A chip is a high-security and rich-function encryption IC developed by ATMEL company, an SHA256 algorithm is used for encryption operation, a slot (EEPROM) with 16 bytes is arranged in the chip, the slot (EEPROM) can store user data and a secret key, the ciphertext module can receive card number information of the access control card and encrypt the card number information, the data is prevented from being stolen by lawless persons, and privacy of users is further protected.

The device also comprises an output module, wherein the main control module is connected to the output module, the output module is used for being connected to external alarm equipment, and when the device detects a copy card without authority, the device can output signals to the outside for alarm processing.

What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.

Claims

1. The utility model provides an realize entrance guard's device of quick card number reading which characterized in that includes: the reading head chip is connected with the main control module, the reading head chip is connected to the reading head antenna coil through the card number reading circuit, the reading head antenna coil comprises three information output ends, the card number reading circuit comprises two inductors, a plurality of capacitors and a plurality of resistors, the first information output end is connected to one end of the first capacitor and one end of the second capacitor through the first resistor, the other end of the second capacitor is connected to one end of the third capacitor and one end of the first inductor, and the other end of the first inductor is connected to the first signal end of the reading head chip;

the second information output end is connected to a third signal end of the reading head chip through a second resistor, the third signal end of the reading head chip is further connected with a common end of the first inductor and the second capacitor through a third capacitor, the third signal end of the reading head chip is further connected with a common end of the second inductor and a sixth capacitor through a fifth capacitor, the third signal end of the reading head chip is further connected with a common end of the second capacitor and the first resistor through the first inductor, and the third signal end of the reading head chip is further connected with a common end of the sixth capacitor and the third resistor through a fourth capacitor;

2. The door access device according to claim 1, wherein the reading head module further comprises a clock frequency circuit, the clock frequency circuit comprises a crystal oscillator and two capacitors, a clock output signal terminal of the reading head chip is connected to one terminal of a ninth capacitor and a first input terminal of the crystal oscillator, a first output terminal of the crystal oscillator is connected to a clock input signal terminal of the reading head chip and one terminal of a tenth capacitor, and the other terminal of the ninth capacitor, the other terminal of the tenth capacitor, a second input terminal of the crystal oscillator and a second output terminal of the crystal oscillator are grounded.

3. The access control device of claim 1, further comprising a ciphertext module, wherein the main control module is connected to the ciphertext module, and the ciphertext module is constructed based on a ciphertext chip with the model number of ATSHA 204A.

4. The access control device as claimed in claim 1, further comprising a buzzer driving circuit, wherein the main control module is connected to the buzzer driving circuit, and the buzzer driving circuit is used for being connected to an external buzzer.

5. The access control device as claimed in claim 1, wherein the reader chip is a contactless communication chip operating at 13.56 MHz.

6. An access control device as claimed in any one of claims 1 to 5 wherein the readhead chip is of the type FM 17550.