CN209959044U

CN209959044U - Household safe control system with double fingerprint identification

Info

Publication number: CN209959044U
Application number: CN201920577034.5U
Authority: CN
Inventors: 周金芝; 杨明
Original assignee: Bozhou University
Current assignee: Bozhou University
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-01-17
Anticipated expiration: 2029-04-25

Abstract

The utility model discloses to depositing of family's public property and valuables, designed a double fingerprint identification's domestic safe deposit box control system. The system is composed of a single-chip microcomputer minimum system, a fingerprint module, a serial communication module, an electromagnetic relay module, a buzzer module and a touch color screen module, and can achieve functions of registering, unlocking and cancelling a user. By inputting and verifying fingerprints of two persons, the safety of the system is enhanced. Through testing, the system is stable and reliable, has high sensitivity and meets the design requirements.

Description

Household safe control system with double fingerprint identification

Technical Field

The utility model belongs to be used for the family safety protection field, concretely relates to double fingerprint identification's domestic safe case control system.

Technical Field

The improvement of living standard of people and the increasing of family wealth, the safe case becomes an important tool for storing the valuables in the family. The traditional safe is generally of a key type or a password type, and the safety is not enough. The fingerprint identification technology is used for the safe, so that the security and safety of the safe can be greatly improved. Fingerprints are widely used for identity authentication and identification due to the characteristics of convenience, stability and uniqueness. Present safe deposit box based on fingerprint identification is mostly single fingerprint identification, the utility model discloses based on embedded technique and fingerprint identification technique, designed one set of double fingerprint identification's domestic safe deposit box control system for deposit the public property and the valuables of family, further strengthened the security of safe deposit box.

The prior art has the following problems:

1. in a traditional mechanical safety box, a key needs to be carried or kept, the key is troublesome, and the danger that the key is lost, is imitated by others or is opened by a private key, and is easily unlocked by an unlocking tool exists.

2. The password type safe has the risk that the password is forgotten or revealed;

3. the IC card-swiping type safety box can also face the potential safety hazard that the property is lost due to the loss and theft of the IC card.

SUMMERY OF THE UTILITY MODEL

For solving the problem in the above-mentioned background, the utility model relates to a double fingerprint identification's domestic safe deposit box control system has characteristics such as security performance height, uniqueness, convenience.

In order to achieve the above object, the utility model provides a following technical scheme: a double fingerprint identification household safe control system comprises a single chip microcomputer minimum system, a serial communication module and a control module, wherein the single chip microcomputer minimum system is an STM32F103ZET6 chip; the minimum system of the single chip microcomputer is connected with the fingerprint sensor; the minimum system of the single chip microcomputer is connected with the electromagnetic relay module; the minimum system of the single chip microcomputer is connected with the buzzer module; the minimum system of the single chip is connected with the independent key; the minimum system of the single chip microcomputer is connected with a liquid crystal display module.

Preferably, the single chip microcomputer minimum system takes an STM32F103ZET6 chip as a control core and adopts an interrupt processing technology of an ARMCortex-M3 kernel;

preferably, the liquid crystal display module adopts a 2.4-inch TFT liquid crystal display screen;

preferably, the electromagnetic relay module is used for controlling the opening and closing of the electromagnetic lock.

Preferably, the fingerprint sensor module consists of an optical fingerprint sensor module and a semiconductor fingerprint sensor module;

preferably, the buzzer module plays a role in sound prompt;

compared with the prior art, the beneficial effects of the utility model are that:

1. STM32F103ZET6 singlechip is selected as the control core of system through the system. STM32F103ZET6 is 32-bit microcontroller, adopts ARM Cortex-M3 kernel, has the advantage that the low power consumption, the performance is high. Compared with 8-bit and 16-bit single-chip machines, the single-chip machine has the characteristics of higher performance, stronger specificity, more pins, strong functions and wide application; by the fact that STM32F103ZET6 has the highest working frequency of 72MHz, complexity of a system peripheral circuit can be simplified due to abundant on-chip peripherals; the ARMCortex-M3 kernel adopts Tail-changing interruption technology in the interruption processing, and the interruption can be reduced by 70% in practical application due to the interruption processing completely based on hardware. The amount of code is reduced by 45% by a single Thumb-2 instruction set. The ARM frame comprises an ARM v7 Harvard framework, a three-stage pipeline, performance and power consumption of 1.25DMIPS/MHZ and 0.19MW/MHZ and a prominent energy efficiency ratio of 0.06mW/MHZ, and a Cortex-M3 processor is internally integrated with most of memories and controllers, and can be directly connected with Flash outside, so that the design difficulty and the application obstacle are reduced, the programmable complexity is greatly simplified, and the ARM frame forms a better choice of various application schemes.

2. The electromagnetic relay control circuit is composed of a control system input loop and a controlled system output loop, the control system is used for driving the loop to generate electromagnetic attraction, the controlled system is driven by mechanical transmission (contacts of a load loop are closed, so that the load loop is conducted to work, and the electromagnetic relay control circuit plays roles of automatic adjustment, safety protection, circuit conversion and the like in the circuit by controlling an automatic switch of large current and high voltage with small current and low voltage.

3. The fingerprint module has the functions of fingerprint input, image processing, fingerprint comparison, search, template storage and the like. When logging in through the fingerprint, each fingerprint is logged twice, then fingerprint images logged twice are processed, and a synthesized fingerprint template is stored in the module; in the fingerprint matching stage, a fingerprint to be verified acquires a fingerprint image through a fingerprint sensor, processes the image, compares the image with a fingerprint template in a module and matches the image with the fingerprint template in the module, and if the image is matched with a specified template in the module, the fingerprint comparison is called as fingerprint comparison (1: 1); if matching with a plurality of templates, namely fingerprint searching (1: N), the fingerprint module gives a result of matching success or failure.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a diagram of the fingerprint interface circuit of the present invention;

fig. 3 is an electromagnetic relay circuit of the present invention;

figure 4 shows a buzzer module circuit of the present invention;

fig. 5 is a TFT liquid crystal module circuit of the present invention;

fig. 6 is a fingerprint input flow of the present invention;

FIG. 7 is a flowchart illustrating the fingerprint search process of the present invention;

fig. 8 is a user registration flowchart of the present invention;

FIG. 9 is a flow chart of the system of the present invention;

in the figure: 1. the single chip microcomputer STM32F103ZET6 minimum system; 2. a fingerprint sensor;

3. an independent key; 4. a serial communication module; 5. an electromagnetic relay; 6. a buzzer module;

7. and a TFT liquid crystal display screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

The safety box control system of the utility model is designed as shown in fig. 1, and comprises a single chip microcomputer STM32F103ZET6 minimum system, a serial communication module, a fingerprint sensor, an electromagnetic relay module, a buzzer module, independent keys and a liquid crystal display module; the single chip microcomputer minimum system consists of an STM32F103ZET6 chip, a power supply circuit, a clock circuit, a reset circuit, a start configuration circuit and a program downloading circuit; the liquid crystal display module adopts a TFT liquid crystal display screen, and three keys of unlocking, registering and canceling are arranged on the display screen for a user to operate; the electromagnetic relay module is used for controlling the opening and closing of the electromagnetic lock.

As shown in fig. 2, the fingerprint interface circuit of the present invention, the fingerprint module in the fingerprint module defines and describes the function of each pin of the interface circuit

Pin number	Name (R)	Type (B)	Description of functions
				1	Vin	in	A positive power supply input. (line color: red)
2	TD	out	And outputting the serial data. TTL logicA level. (line color: green)
				3	RD	in	And inputting serial data. TTL logic level. (line color: white)
4	GND	–	Signal ground. The interior is connected to a power ground. (line color: black)

The fingerprint module communicates with singlechip STM32F103ZET6 through serial communication interface. The module pin 2 (data transmitting pin) is connected with a data receiving end (RXD) of the singlechip, and the module pin 3 (data receiving pin) is connected with a data transmitting end (TXD) of the singlechip as shown in the figure.

The utility model discloses an electromagnetic relay circuit, port PD12 connecting resistance R10, resistance R10 connect R9 and triode Q2's base, the collecting electrode of triode connect diode D3 and relay, the triode projecting pole connect the power, electromagnetic relay top be connected with armature, the power socket connect photosensitive diode and R8. The single chip microcomputer provides a low level for the relay circuit through the port PD12, so that the triode Q2 is conducted, the driving circuit is conducted, the electromagnet generates magnetic attraction armature, the movable contact and the fixed contact of the electromagnetic relay are attracted, the electromagnetic lock circuit is conducted, and unlocking is achieved.

As shown in fig. 4, the utility model discloses a buzzer module circuit, the buzzer module play the sound prompt role. The buzzer module circuit consists of a bias resistor, a current-limiting resistor, a PNP type triode and a buzzer. The base of triode Q1 connect R7 and R6, the collecting electrode of triode connect bee calling organ pin 1, the projecting pole of triode is connected the power, bee calling organ pin 2 ground connection, after obtaining a low level of singlechip, the triode switches on, multivibrator starts to vibrate, the audio signal of output certain frequency, drive bee calling organ sound production.

As shown in fig. 5, the utility model discloses a TFT liquid crystal module circuit colored liquid crystal display module system chooses for use 2.4 cun TFT (thin Film transistor) touch color screen as the display screen, mainly used shows some prompt information. The TFT screen is a thin film transistor type liquid crystal display screen, and each pixel point of the TFT screen is driven by a thin film transistor integrated behind the TFT screen, so that the response speed of the display screen is improved, and the display color level can be accurately controlled, so that the color of the TFT liquid crystal is more vivid.

As shown in fig. 6 and 7, the utility model discloses a flow and fingerprint search flow are typeeed to the fingerprint, the utility model discloses a flow fingerprint module is typeeed to the fingerprint has the fingerprint and types, image processing, the fingerprint is compared, search and template stores the function of waiting. Fingerprint processing includes two processes: fingerprint login and fingerprint matching; fingerprint matching has two modes: fingerprint comparison (1: 1) and fingerprint search (1: N). When the fingerprint is logged in, each fingerprint is logged in twice, then the fingerprint images logged in twice are processed, and the synthesized fingerprint template is stored in the module. In the fingerprint matching stage, a fingerprint to be verified acquires a fingerprint image through a fingerprint sensor, processes the image, then compares the image with a fingerprint template in a module for matching, and if the image is matched with a specified template in the module, the fingerprint matching is called as fingerprint comparison (1: 1); if matching with a plurality of templates, namely fingerprint searching (1: N), the fingerprint module gives a result of matching success or failure.

Fig. 8 shows a registration process of the system design of the present invention.

Step 1, electrifying, wherein the indicator lights led1 and led2 flash, when no user exists in the system (the two indicator lights are shown as the basis after the system is turned on or reset);

and 2, pressing a registration key on the touch screen, entering a user registration mode, sequentially performing fingerprint input on two users, collecting fingerprints twice by each user, synthesizing a fingerprint template, and storing the fingerprint template in the module.

As shown in fig. 9, the system of the cabinet control system design uses a flow chart.

When a user wants to open the safe, the fingerprints of the two users need to be matched and verified in sequence, and if the fingerprints are verified successfully, the single chip microcomputer sends a low-level signal to a driving circuit of the electromagnetic relay to drive the load circuit and open the electromagnetic lock. When the user presses the lock key, the lock is locked again.

Step 1, after power-on or reset, led1 flickers, led2 lights, and user home fingerprint verification is waited;

and 2, placing the finger of the user A on the fingerprint module, and then turning off the led1 and the led2 or sounding the buzzer, so that the user A is successfully verified.

And 3, when the finger of the user A leaves, the Led1 is bright, the Led2 flickers, and the user B is waited to be successfully verified.

And 4, the user B releases the fingers, the led1 and the led2 are lightened, and the electronic lock is opened.

And step 5, pressing the up-down locking key1 (power off or reset), and locking the electronic lock again.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The present invention is not limited to the above description of the embodiments, and those skilled in the art should be able to make modifications and alterations without creative work on the basis of the present invention.

Claims

1. The utility model provides a double fingerprint identification's domestic safe case control system, its characterized in that, includes singlechip STM32F103ZET6 minimum system (1), fingerprint sensor (2), independent button (3), serial communication module (4), electromagnetic relay (5), buzzer module (6), TFT liquid crystal display (7).

2. The double fingerprint identification household safe control system of claim 1, characterized in that: and the STM32F103ZET6 single chip microcomputer serves as a control core of the system.

3. The double fingerprint identification household safe control system of claim 1, characterized in that: the fingerprint sensor is formed by combining an optical fingerprint sensor and a semiconductor fingerprint sensor.

4. The double fingerprint identification household safe control system of claim 1, characterized in that: the electromagnetic relay control circuit consists of a control system input loop and a controlled system output loop, the control system is used for driving the loop to generate electromagnetic attraction, and contacts of a controlled system load loop are driven to be closed through mechanical transmission, so that the load loop is conducted to work.

5. The double fingerprint identification household safe control system of claim 4, wherein: the single chip microcomputer provides a low level for the relay circuit through the port PD12, so that the triode Q2 is conducted, the driving circuit is conducted, the electromagnet generates magnetic attraction armature, the movable contact and the fixed contact of the electromagnetic relay are attracted, the electromagnetic lock circuit is conducted, and unlocking is achieved.

6. The double fingerprint identification household safe control system of claim 5, wherein: port PD12 connecting resistance R10, resistance R10 connect R9 and triode Q2's base, the collecting electrode of triode connect diode D3 and relay, the triode projecting pole connect the power, electromagnetic relay top be connected with armature U4, resistance R8 is connected to one side of armature U4, photosensitive diode D2 other end connection power seat J3 is connected to resistance R8's one end.

7. The double fingerprint identification household safe control system of claim 1, characterized in that: the buzzer module plays a role in sound prompt, after the single chip microcomputer obtains a low level, the triode is conducted, the multivibrator starts to vibrate, an audio signal with a certain frequency is output, and the buzzer is driven to sound.

8. The double fingerprint identification household safe control system of claim 7, wherein the base of the triode Q1 is connected with R7 and R6, the collector of the triode Q1 is connected with a buzzer pin 1, the emitter of the triode Q1 is connected with a power supply, and the buzzer pin 2 is grounded.

9. The double fingerprint identification household safe control system of claim 1, characterized in that: the TFT liquid crystal display screen adopts a 2.4-inch TFT (thin Film transistor) touch color screen.