CN205750958U - Coded lock based on FPGA - Google Patents

Abstract

A combination lock based on FPGA. The early mechanical combination locks had the disadvantages of few passwords and poor security. An FPGA-based cipher lock, comprising: an FPGA system, wherein the FPGA system (1) has a key processing module circuit (1‑1), a main control CPU (1‑2) and a decoding display circuit (1 ‑3), the FPGA system is externally connected with an opening/closing module circuit (2), an alarm module circuit (3), a keyboard circuit (5), a display (4) and a WiFi receiving control module circuit 6, and the The keyboard circuit is connected to the key processing module circuit through wires, the key processing module circuit is connected to the main control CPU, the main control CPU is connected to the decoding display circuit, and the decoding display circuit is connected to the display. The utility model is applied to the field of security, in particular to a combination lock based on FPGA.

Description

FPGA-Based Combination Lock

Technical field:

The utility model relates to the security field, in particular to an FPGA-based combination lock.

Background technique:

The main function of the password lock is to encrypt and protect certain operations, the purpose is to prevent unauthorized personnel from using certain facilities or performing unauthorized operations. Its practical application is very extensive, such as door card systems, vending machines, bank ATMs Or all safes contain this kind of coded lock; the early mechanical coded locks had the disadvantages of less codes and poor security, and today, with the rapid development of electronic technology, electronic coded locks with functions such as anti-theft alarms replace mechanical coded locks It is an inevitable trend. The electronic combination lock has the unparalleled superiority of the mechanical lock. It can not only complete the function of the lock itself, but also have other functions, such as identification, alarm, etc.; , low power consumption, easy operation and other advantages, making it welcomed by more and more people.

Invention content:

The purpose of the utility model is to provide a combination lock based on FPGA.

Above-mentioned purpose realizes by following technical scheme:

A kind of combination lock based on FPGA, its composition comprises: FPGA system, described FPGA system interior has button processing module circuit, main control CPU and decoding display circuit, described FPGA system is connected with opening/closing module circuit respectively , an alarm module circuit, a keyboard circuit, a display and a WiFi receiving control module circuit, the keyboard circuit is connected to the key processing module circuit through wires, the key processing module circuit is connected to the main control CPU, and the main control CPU is connected to the decoding A display circuit, the decoding and display circuit is connected to a display.

The FPGA-based combination lock, the FPGA system and the WiFi receiving control module circuit are respectively connected to the power system circuit, and the WiFi receiving control module circuit is connected to the mobile phone through a wireless network.

In the FPGA-based combination lock, the main control CPU adopts a module chip with a model number of EPF10K10LC84-4.

The beneficial effects of the utility model:

1. The combination lock of this utility model adopts the FPGA control system, and its characteristics are: small size, low power consumption, cheap price, safe and reliable, very convenient for maintenance and upgrading, and can realize timely and intelligent management when used in conjunction with programmable logic devices Function, especially in the expansion of the system has a good advantage, has a good application prospect.

Combination lock of the present utility model, when password input is correct, its state is simulated with LED indicator light, and wherein with red light off, and green light is on to represent unlocking;

The combination lock of the present utility model stores a modifiable 1-10-digit password in the combination lock master control CPU, and realizes unlocking when the unlock button switch is pressed and the input password is equal to the value stored in the memory, otherwise the lock will be closed all the time, and will cause Call the police.

In the combination lock of the present invention, if the wrong password is input for three consecutive times, the circuit is automatically in a self-locking state, making it impossible to open again, and the speaker sends an alarm signal for 20 seconds, and the password is not allowed to be input again until the reset button is pressed.

In the password lock of the present utility model, the first action of inputting the password triggers an 8-second timer, and if there is no confirmation signal for unlocking within 8 seconds, the speaker emits a warning sound and the LED light continuously flashes.

The password lock of the utility model adopts the WiFi receiving control module circuit and adopts the wireless communication technology, and does not need to rewire, so that the installation and use of the whole system are more flexible and convenient. Protective modification of the passwords of the combination locks of the parts and devices used is conducive to strengthening the management of the parts and devices that need to be protected.

Description of drawings:

Accompanying drawing 1 is the structural representation of the utility model.

Accompanying drawing 2 is the minimum system diagram of EPF10K10LC84-4 of the present utility model.

Accompanying drawing 3 is the schematic diagram of the power supply circuit of the present utility model.

Accompanying drawing 4 is the schematic diagram of the external clock circuit of the present utility model.

Accompanying drawing 5 is the interface circuit schematic diagram of the present utility model.

In the figure: 1 — FPGA system; 1-1 — button processing module circuit; 1-2 — main control CPU; 1-3 — decoding display circuit; 2 — door opening/closing module circuit; 3 — alarm module circuit; 4 — Display; 5 - keyboard circuit; 6 - WiFi receiving control module circuit; 7 - power system circuit; 8 - mobile phone;

detailed description:

Example 1:

A kind of combination lock based on FPGA, its composition comprises: FPGA system, described FPGA system 1 inside has button processing module circuit 1-1, main control CPU1-2 and decoding display circuit 1-, described FPGA system outside Respectively connected with opening/closing module circuit 2, alarm module circuit 3, keyboard circuit 5, display 4 and WiFi receiving control module circuit 6, described keyboard circuit is connected to button processing module circuit by wire, and described button processing module circuit is connected A main control CPU, the main control CPU is connected to a decoding and display circuit, and the decoding and display circuit is connected to a display.

Example 2:

According to the combination lock based on FPGA described in Embodiment 1, the FPGA system and the WiFi receiving control module circuit are respectively connected to the power supply system circuit 8, and the WiFi receiving control module circuit is connected to the mobile phone 8 through a wireless network.

Example 3:

According to the combination lock based on FPGA described in Embodiment 2, the main control CPU adopts a module chip whose model is EPF10K10LC84-4.

Example 4:

According to the combination lock based on FPGA described in embodiment 2, its overall design principle is: realize the integration of a large number of logic circuits in the system, and use a field programmable logic gate array device (FPGA) in the design; FPGA mainly realizes the following in the system Logic functions: keyboard processing, decoding display, password setting, decoding and opening, alarm and other control functions; the system has 13 keys, including 10 number keys from 0 to 9, 1 confirmation key, 1 alarm reset key, 1 (1) After entering the correct password through the keyboard or through the mobile phone and pressing the confirmation button, both the keyboard and the WiFi receiving control module circuit will pass the correct information to the key processing module circuit, and then the key processing module circuit will After processing, it is transmitted to the main control CPU module, and then transmitted to the opening/closing module circuit after being processed by the main control CPU to control the peripheral equipment to open the door; (2) When the wrong password is entered through the keyboard or through the mobile phone and the confirmation key is pressed, the keyboard And the WiFi receiving control module circuit will pass the wrong information to the button processing module circuit, and then pass it to the main control CPU module after being processed by the key processing module circuit, and then pass it to the opening/closing module circuit after being processed by the main control CPU to control the peripheral The device does not open the door, and the alarm circuit alarms at the same time; (3) When the door is open, the password can be set after entering the new password for the first time and then confirming the password. The entered password is displayed on the 10-digit digital tube, and the last entered number is displayed on the On the far right, every time a digit is input, the display of the password on the digital tube will move one digit to the left, and the high digit zero does not need to be input, so the password can be 1~10 digits, and the initial password is 0, that is, after power on, press the confirm button The door can be opened; (4) After the door is opened, the door can be closed by the lock button, and the door can only be opened by entering the password again after the door is closed. In the process of entering the password, when the user enters the wrong password, the system will alarm, and the alarm will sound from the speaker. When the wrong password appears three times in a row, the system will alarm for a long time (20 seconds), and the reset button must be pressed to stop.

Claims (3)

1. a coded lock based on FPGA, its composition includes: FPGA system, it is characterized in that: the internal tool of described FPGA system There are keystroke handling modular circuit, master cpu and coding display circuit, outside described FPGA system, are connected to opening-closing door Modular circuit, alarm module circuitry, keyboard circuit, display and WiFi receive control module circuit, and described keyboard circuit leads to Crossing wire and connect keystroke handling modular circuit, described keystroke handling modular circuit connects master cpu, and described master cpu is even Connecing coding display circuit, described coding display circuit connects display.

Coded lock based on FPGA the most according to claim 1, is characterized in that: described FPGA system and described WiFi Receiving control module circuit and connect power system circuit respectively, described WiFi receives control module circuit by wireless network even Catcher machine.

Coded lock based on FPGA the most according to claim 2, is characterized in that: described master cpu employing model is: The module chip of EPF10K10LC84-4.