CN208861340U - A kind of finger-print cipher application circuit and coded lock - Google Patents

Abstract

The utility model belongs to fingerprint identification technology field, specifically provide a kind of finger-print cipher application circuit and coded lock, module SENSOR is obtained by microcontroller, memory module FLASH, fingerprint monitoring modular TOUCHKEY and fingerprint to realize the identification and matching of fingerprint, to realize the opening and closing to coded lock, modules use low-power chip, and it will be connected to each other by peripheral circuit, pass through the technical solution, realize the quick opening and closing of coded lock, and allow coded lock to rapidly enter dormant state in the input of no fingerprint, reach energy saving purpose.

Description

A kind of finger-print cipher application circuit and coded lock

Technical field

The utility model belongs to fingerprint identification technology field, and in particular to a kind of finger-print cipher application circuit and coded lock.

Background technique

People often because can not find key can not enter and worried, do not know when especially child old man is easily lost key What is to be done, therefore finger-print puzzle lock comes into being.Each application on human skin lines (including fingerprint) is in pattern, breakpoint and intersection It is different on point, be it is unique and constant throughout one's life, it is measurable that our ten fingers generate minimum 4900 independence Feature, need to be by the fingerprint typing coding lock system of user using preceding, and in use, user need to only use finger Induction panel is touched, system automatic identification fingerprint, then coded lock automatically opens successful match.In existing coded lock, usually Delay time of unlocking because fingerprint incudes slow, identification mistake, the experience of extreme influence user, on the other hand, due to password Lock needs to provide power supply, therefore often very inconvenient to coded lock charging.

Summary of the invention

Problem slow the purpose of the utility model is to overcome the unlocking of finger-print puzzle lock in the prior art and that power consumption is fast.

For this purpose, the utility model provides a kind of finger-print cipher application circuit, including microcontroller, memory module FLASH, fingerprint monitoring modular TOUCHKEY, fingerprint obtain module SENSOR and power supply；

The microcontroller includes GD32FFPRTGU6 chip and the periphery that connect with the GD32FFPRTGU6 chip Circuit；

It includes BF5326A chip that the fingerprint, which obtains module SENSOR, the BF5326A chip with it is described The electrical connection of GD32FFPRTGU6 chip；

The memory module FLASH includes BY25D80ASMIG chip, the BY25D80ASMIG chip with it is described The electrical connection of GD32FFPRTGU6 chip；

The fingerprint monitoring modular TOUCHKEY includes BF6881A chip, the BF6881A respectively with it is described GD32FFPRTGU6 chip and BF5326A chip electrical connection；

The power supply respectively with the microcontroller, memory module FLASH, fingerprint monitoring modular TOUCHKEY and refer to Line obtains module SENSOR electrical connection.

Further, the GD32FFPRTGU6 chip and the BY25D80ASMIG chip by chip are arranged on pcb board.

The utility model additionally provides a kind of coded lock, comprising:

Sensor, the sensor are electrically connected with the BF6881A chip；

Processor CPU, the processor CPU are electrically connected with the GD32FFPRTGU6 chip and drive motor respectively；

Power module, the power module are electrically connected with the drive motor, sensor and processor CPU respectively.

It further, further include bulletin module, the bulletin module includes display module and/or loudspeaker, the display Module and/or loudspeaker are electrically connected with the processor CPU respectively.

Further, the display module includes LED display and fluorescent lamp.

It further, further include power management module, including NMOS tube, the NMOS tube grid is electrically connected with processor CPU It connects, the drain electrode of the NMOS tube is electrically connected with the power module, and source electrode and the drive motor of the NMOS pipe are electrically connected It connects.

Further, the UART_TD pin of the PA9 pin of the GD32FFPRTGU6 chip and the processor CPU it Between connected by NMOS tube, the UART_RD pin of the PA10 pin of the GD32FFPRTGU6 chip and the processor CPU it Between pass through NMOS tube connect.

The utility model has the beneficial effects that

This finger-print cipher application circuit and coded lock provided by the utility model pass through microcontroller, storage mould Block FLASH, fingerprint monitoring modular TOUCHKEY and fingerprint obtain module SENSOR to realize the identification and matching of fingerprint, Lai Shixian Opening and closing to coded lock, modules use low-power chip, and will be connected to each other by peripheral circuit, pass through the skill Art scheme realizes the quick opening and closing of coded lock, and allows coded lock to rapidly enter suspend mode shape in the input of no fingerprint State reaches energy saving purpose.

The utility model is described in further details below with reference to attached drawing.

Detailed description of the invention

Fig. 1 is the circuit diagram of the main control chip U1 of the utility model finger-print cipher application circuit and coded lock；

Fig. 2 is the circuit diagram of the memory chip U5 of the utility model finger-print cipher application circuit and coded lock；

Fig. 3 is the circuit diagram of the fingerprint acquisition module of the utility model finger-print cipher application circuit and coded lock；

Fig. 4 is the circuit diagram of the fingerprint monitoring modular of the utility model finger-print cipher application circuit and coded lock；

Fig. 5 is the main control chip U1 and coded lock processor CPU of the utility model finger-print cipher application circuit and coded lock Communication connection circuit diagram.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work All other embodiment obtained, fall within the protection scope of the utility model.

In the description of the present invention, it should be understood that term " center ", "upper", "lower", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute The orientation or positional relationship shown, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this is practical Novel limitation.

Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply Ground includes one or more of the features；In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two It is a or more than two.

The utility model proposes a kind of finger-print cipher application circuits, it is characterised in that: including microcontroller, storage Module FLASH, fingerprint monitoring modular TOUCHKEY and fingerprint obtain module SENSOR；The microcontroller includes GD32FFPRTGU6 chip and the peripheral circuit being connect with the GD32FFPRTGU6 chip；The fingerprint obtains module SENSOR Including BF5326A chip, the BF5326A chip is electrically connected with the GD32FFPRTGU6 chip；The memory module FLASH includes BY25D80ASMIG chip, and the BY25D80ASMIG chip is electrically connected with the GD32FFPRTGU6 chip； The fingerprint monitoring modular TOUCHKEY includes BF6881A chip, the BF6881A respectively with the GD32FFPRTGU6 chip And the BF5326A chip electrical connection, the power supply are monitored with the microcontroller, memory module FLASH, fingerprint respectively Module TOUCHKEY and fingerprint obtain module SENSOR electrical connection.It follows that as shown in Figures 1 to 5, main control chip U1 is used The dedicated MCU of GD32FFPRTGU6 fingerprint recognition that million easily innovation GigaDevice are provided, and difference is realized by peripheral circuit With being electrically connected for other modules.Wherein, it is dedicated to obtain the fingerprint recognition that module SENSOR is provided using BYD company for fingerprint BF5326A chip, and fingerprint collecting that fingerprint monitoring modular TOUCHKEY is used and that BYD company provides is dedicated BF6881A chip, the chip to the acquisition of fingerprint and identification fast and accurately.In addition, with FLASH (BY25D80ASMIG) chip As memory, the speed of the memory access of fingerprint identification process is improved, BY25D80ASMIG chip /CS pin, SO draw Foot, SCLK pin and SI pin respectively with the PA15 pin of GD32FFPRTGU6 chip, PB4 pin, PB3 pin and PB5 pin Connection.All chips pass through V-3.3V-D-S power supply and are powered.

Wherein, peripheral circuit includes: that the PA1 pin of GD32FFPRTGU6 chip and the INT of the BF6881A chip draw It is connected between foot by 10k Ω resistance.It follows that as shown in Figure 1 and Figure 4, GD32FFPRTGU6 chip and BF6881A core Piece is communicated by TouchOut, and the finger print information packing that BF6881A chip will test is then passed to GD32FFPRTGU6 chip is handled, and 10k Ω is equipped on two chip communication routes and plays the role of current limliting and impedance matching, Convenient individually debugging, moreover it is possible to play the role of Anti-surging.In addition, the VTX pin of BF5326A chip, LDO_RING pin and VCAL pin passes through 1 μ F capacity earth respectively.It follows that these three pins pass through 1 μ F capacity earth respectively, do not show in figure Out, when carrying out PCB layout, place arrangement capacitor is closed in above three pin, by adding capacity earth, effectively filtering is outer Boundary's interference peace information, plays filter action, improves the accuracy of fingerprint recognition.In addition, the chip is also to connect 3.3v power supply.

The PB7 pin of GD32FFPRTGU6 chip is connect with the SDA pin of the BF6881A chip by pull-up resistor The SCL pin of 3.3v power supply, the PB6 pin of the GD32FFPRTGU6 chip and the BF6881A chip passes through pull-up resistor Connect 3.3v power supply.It follows that as shown in Figure 1 and Figure 4, by upper between GD32FFPRTGU6 chip and BF6881A chip Pull-up resistor is attached, and pull-up resistor resistance value is 4.7k Ω, and pull-up power supply V-3.3v-D-S, communication mode is that I2C serially leads to Letter mode.By the pull-up resistor of the 4.7k Ω, it has been effectively ensured between multiple chips and has been consistent, it is different to avoid level It causes and electric current is caused to flow backward mutually；In addition, SDA and SCL are at high level state in I2C bus free, it is effectively anti- Only external disturbance causes error starting I2C bus, influences to communicate.

Further scheme, the GD32FFPRTGU6 chip and the BY25D80ASMIG chip by chip are arranged in PCB On plate.BY25D80ASMIG chip is a FLASH storage chip of BYD company research and development, as far as possible in PCB layout typesetting By storage chip close to GD32FFPRTGU6 chip layout, disposed adjacent can shorten cabling, reduce extraneous crosstalk, improve information The stability and high speed of access.

The utility model additionally provides a kind of coded lock, comprising: sensor, the sensor and the BF6881A chip Electrical connection；Processor CPU, the processor CPU are electrically connected with the GD32FFPRTGU6 chip and drive motor respectively；Electricity Source module, the power module are electrically connected with the drive motor, sensor and processor CPU respectively.It follows that the password Under the premise of lock is using above-mentioned finger-print cipher application circuit, it is equipped with ppu CPU, power module and drive motor. Connected between the PA9 pin of the GD32FFPRTGU6 chip and the UART_TD pin of the processor CPU by NMOS tube It connects, passes through NMOS tube between the PA10 pin of the GD32FFPRTGU6 chip and the UART_RD pin of the processor CPU Connection, with this come the communication established between two processing chips, when GD32FFPRTGU6 chip obtains finger print information and successful match When, processor CPU is passed it to, processor CPU controls drive motor unlocking again.Wherein, sensor is using super One of sound wave fingerprint collecting sensor, semiconductor transducer or optical sensor.

Further scheme further includes bulletin module, and the bulletin module includes display module and/or loudspeaker, described Display module and/or loudspeaker are electrically connected with the processor CPU respectively.It follows that being informed in real time by bulletin module The state of user password lock, for example, if the success of system Auto-matching, display module shows " door is opened " after pressing fingerprint Printed words, loudspeaker can also inform user with this with voice broadcast " door is opened ".

Further scheme, the display module include LED display and fluorescent lamp.It follows that LED display exists It does not shine when coded lock dormant state, fluorescent lamp can play the role of navigation, and especially when ambient light deficiency, user is not Fingerprint typing touch area can be quickly navigated to, fluorescent lamp can play the role of good navigator fix because of its self-luminous principle.

Further scheme, further includes power management module, including NMOS tube, the NMOS tube grid and processor CPU Electrical connection, the drain electrode of the NMOS tube are electrically connected with the power module, the source electrode of the NMOS tube and drive motor electricity Connection.It follows that CPU control NMOS tube come open/close drive motor, realize the automatic opening/closing function of coded lock.

Principle: usually for fingerprint monitoring modular TOUCHKEY when not detecting signal, system power supply is in power down shape State, only the V-3.3V-TOUCH power supply of the part TOUCHKEY, and itself is a super low-power consumption chip, consumptions by BF6881A It is electric seldom.When finger touches RING, a signal is coupled to BF6881A by CK4, then BF6881A puts signal GD32FFPRTGU6 chip is sent to by the 3rd pin TouchOut greatly.GD32FFPRTGU6 chip is sent out after receiving trigger signal Send corresponding signal to power module, the 3.3v voltage of V-3.3V-D-S conveying at this time comes, completes whole system and power on, coded lock is just It is initially powered up, modules are started to work, and GD32FFPRTGU6 chip and processor CPU form communication and data transmission.When being It after system completes corresponding operation, is resetted and is reset by upper processor CPU software, V-3.3V-D-S power down, system stops conveying number According to system standby enters dormant state, until next starting signal comes.

Product function test:

(1) fingerprint collecting is verified, and in the random typing difference finger print of man-machine interface, interface is more enough to be clearly apparent fingerprint, And having prompt typing progress, automatic identification with the presence or absence of repetition fingerprint and saves after the completion of typing.Refer to when using prosthetic finger typing When line, system prompt fingerprint typing mistake, and user is prompted to replace finger.

(2) fingerprint comparison is verified, and under man-machine interface dormant state, directly carries out identity with the finger that fingerprint is crossed in typing Certification, door lock are performed fighting out automatically.When using other instead does not have the finger of preparatory typing fingerprint or prosthetic finger to be authenticated, system User can be prompted to be not present, finger please be replace.Continuous 5 errors, system meeting automatic alarm enter security monitoring mode.

(3) product network online upgrade data cloud storage enters internet in the man-machine page of user and tests.Can succeed into Row on-line software updating.And data cloud storage

Product reliability test:

(1) product Low-power test, it is desirable that electric current is less than 20uA to complete machine in the dormant state；Running current is less than 1A；

(2) product high-low temperature resistant is tested, it is desirable that 70 degree of high temperature are tested after storage 48 hours, and function OK, appearance is without obvious change Change.After the degree of low temperature -40 storage 48 hours, tested after static 2 hours, function OK, appearance is without obvious variation；

(3) cooling thermal impact is tested, and after GB2423 " electric and electronic product Essential Environment testing regulations " standard testing, is produced Moral character energy OK, appearance is without significant change；

(4) smog is tested, and soda acid salt spray test 48 hours, is tested after drying, function OK, and appearance is without obvious corrosion；

(5) wear-resisting test applies the lotus of 500g on dedicated measuring head mainly for fingerprint typing touch area Weight, with 40 beats/min of speed, wipes 250 times back and forth in sample surfaces.It does not fade as OK on surface.

This finger-print cipher application circuit and coded lock provided by the utility model pass through microcontroller, storage mould Block FLASH, fingerprint monitoring modular TOUCHKEY and fingerprint obtain module SENSOR to realize the identification and matching of fingerprint, come real Now to the opening and closing of coded lock, modules use low-power chip, and will be connected to each other by peripheral circuit, by this Technical solution realizes the quick opening and closing of coded lock, and allows coded lock to rapidly enter suspend mode in the input of no fingerprint State reaches energy saving purpose.

Exemplified as above is only to the utility model for example, not constituting to the protection scope of the utility model Limitation, within all designs the same or similar with the utility model all belong to the scope of protection of the present invention.

Claims (7)

1. a kind of finger-print cipher application circuit, it is characterised in that: including microcontroller, memory module FLASH, fingerprint monitoring Module TOUCHKEY, fingerprint obtain module SENSOR and power supply；

The microcontroller includes GD32FFPRTGU6 chip and the periphery electricity connecting with the GD32FFPRTGU6 chip Road；

It includes BF5326A chip that the fingerprint, which obtains module SENSOR, the BF5326A chip and the GD32FFPRTGU6 core Piece electrical connection；

The memory module FLASH includes BY25D80ASMIG chip, the BY25D80ASMIG chip with it is described The electrical connection of GD32FFPRTGU6 chip；

The fingerprint monitoring modular TOUCHKEY includes BF6881A chip, the BF6881A respectively with the GD32FFPRTGU6 Chip and BF5326A chip electrical connection；

The power supply is obtained with the microcontroller, memory module FLASH, fingerprint monitoring modular TOUCHKEY and fingerprint respectively Modulus block SENSOR electrical connection.

2. finger-print cipher application circuit according to claim 1, it is characterised in that: the GD32FFPRTGU6 chip and institute BY25D80ASMIG chip by chip is stated to be arranged on pcb board.

3. a kind of coded lock, including finger-print cipher application circuit as claimed in claim 1 or 2, which is characterized in that further include:

Sensor, the sensor are electrically connected with the BF6881A chip；

Processor CPU, the processor CPU are electrically connected with the GD32FFPRTGU6 chip and drive motor respectively；

Power module, the power module are electrically connected with the drive motor, sensor and processor CPU respectively.

4. coded lock according to claim 3, it is characterised in that: further include bulletin module, the bulletin module includes aobvious Show that module and/or loudspeaker, the display module and/or loudspeaker are electrically connected with the processor CPU.

5. coded lock according to claim 4, it is characterised in that: the display module includes LED display and fluorescent lamp.

6. coded lock according to claim 3, it is characterised in that: it further include power management module, including NMOS tube, it is described NMOS tube grid is electrically connected with processor CPU, and the drain electrode of the NMOS tube is electrically connected with the power module, the NMOS tube Source electrode is electrically connected with the drive motor.

7. coded lock according to claim 3, it is characterised in that: the PA9 pin of the GD32FFPRTGU6 chip and institute It states and is connected between the UART_TD pin of processor CPU by NMOS tube, the PA10 pin of the GD32FFPRTGU6 chip and institute It states and is connected between the UART_RD pin of processor CPU by NMOS tube.