CN201207193Y - Embedded identity recognition device - Google Patents

Abstract

The utility model discloses an embedded status identification device, which is composed of a biometric collection module, a SOPC programmable on-chip system processing module, a remote biometric image library, a result display module, and a power supply module; by adopting SOPC technique, a Nios II processor, a DSP processor, an on-chip memory, and an I/O interface are integrated on a FPGA, and then combined with peripheral equipments such as 50M active oscillator, EPCS configured memory, FLASH memory, SDRAM memory, configuration interface, and communication interface to form the SOPC programmable on-chip system processing module. The device has the advantages of flexible design, powerful function, system curtailment and meeting the requirements of various new functions in the future. The utility model can be applied in various occasions.

Description

A kind of embedded personal identification device

Technical field

The utility model relates to electronic information detecting instrument technical field, more specifically says, relates to a kind of embedded personal identification device.

Background technology

In the information age, the importance of information security has caused people's extensive concern, need carry out the every aspect that the situation of identity discriminating has been deep into people's life by importing personal information.Identity identifying method commonly used at present mainly contains password password, key, various ID (identity number) card etc., but the security of these methods and reliability can't be guaranteed, be easy to forget or stolen as the password password by the people, various ID (identity number) card, bank card also are easy to be forged etc., and fingerprint, people's face, iris etc. have the important physical feature as the people, have key properties such as uniqueness, non-reproduction, identifiability, therefore the living things feature recognition method can replace the conventional authentication method, become best identity identifying technology.As fingerprint recognition is a kind of faster emerging biometrics identification technology of development in recent years, is at present obtaining application aspect the criminal investigation of public security and the military evaluation.Nowadays, along with development of computer, fingerprint identification technology and Related product thereof have also entered the commercial market, attendance checking system that uses as some units and gate control system etc.The expert estimates that biological characteristics identity recognizing technology will be applied even more extensively on bank ATM cash dispenser, personal communication instrument or various computer equipment.These application scenarios are except the performance that requires equipment, more pay close attention to miniaturization, removableization and the scalable function of equipment, therefore embedded bio feature identification system has practical value more, and the core component of embedded system is exactly a microprocessor, and flush bonding processor has the branch of stone processor (processor structure and function are fixed) and soft-core processor (processor structure and function are unfixing) again.More existing biometric devices have all adopted digital signal processing (DSP, Digital Signal Processor) processor, stone processors such as single-chip microcomputer are realized, learn from the patent status inquiry that Chinese State Intellectual Property Office net is announced, as the patent No. is " 03111558.6 " embedded fingerprint identification module, the patent of the embedded fingerprint recognizer of " 200520010273.0 " a kind of dual processor adopts dsp processor to realize the embedded fingerprint recognizer, and the patent No. adopts dsp processor to realize that embedded human face detects automatically for " 01133782.6 " based on the embedded human face automatic detection equipment of DSP and the invention of method.The stone preparation implement has simple, the deficiency such as can't update at any time of function, does not also adopt the biological characteristic identification system patent of soft-core processor to announce at present or product comes out.The embedded identity recognizer based on the soft-core processor design that we invented still belongs to initiative.FPGA is as a kind of ultra-large integrated circuit, because the trend that its powerful computation capability that has and signal handling capacity become embedded development.NiosII is a employing pipelining of ALTERA company release, 32 RISC (reduced instruction set computer) soft-core processor of single instruction stream.SOPC (System on a Programmable Chip) programmable system on chip is a kind of special embedded system, the system that a plurality of embedded NiosII processors, dsp processor, storer and other control function are formed all can be integrated in the fpga chip, make that the volume of embedded system is littler, with better function.SOPC is called as " future of semiconductor industry ".

Summary of the invention

Technical matters: for overcoming the deficiency that above-mentioned prior art exists, fundamental purpose of the present utility model is to provide a kind of Embedded identity recognition device, it has adopted FPGA and based on the embedded equipment of the SOPC programmable system on chip of Nios II soft-core processor design, realizes the identification of people's identity and identifies function.

Technical scheme: for achieving the above object, a kind of embedded personal identification device of the present utility model, its identity recognition device are by physical characteristics collecting module 1, SOPC programmable system on chip processing module 2, long-range biometric image library module 3, display module 4 and power module 5 are formed as a result.

Wherein, described SOPC programmable system on chip processing module 2 is made up of fpga chip 6, the active crystal oscillator 8 of Avalon bus7,50M, EPCS config memory 9, FLASH storer 10, SDRAM storer 11, configuration interface 12, communication interface 13 etc.; SOPC programmable system on chip processing module 2 is connected with display module 4 as a result with physical characteristics collecting module 1 respectively by USB interface, also is connected with long-range biometric image storehouse 3 by Ethernet interface or wireless network; Power module 5 gives SOPC programmable system on chip processing module 2 power supplies by power interface; In SOPC programmable system on chip processing module 2, fpga chip 6 is connected with LCD display 4, physical characteristics collecting camera 1, the active crystal oscillator 8 of 50M, EPCS config memory 9, FLASH storer 10, SDRAM storer 11, configuration interface 12, communication interface 13 respectively by Avalon bus7.

Wherein, physical characteristics collecting module 1 adopts existing high-resolution camera to realize having scanning, the input function of finishing image, realizes the biometric image collection and is transferred to the function of processor system.

SOPC programmable system on chip processing module 2, should finish the computing of image recognition algorithm, again other module is controlled and detected, finish interrupt request of sending to processor the collection back or the like as handling image acquisition device, Nios II processor changes the processing to biometric image over to.We are with in the SOPC system integration to a fpga chip, and FPGA has adopted the CycloneII chip of ALTERA company, realize the pre-service and the identification and matching of biometric image by creating Nios II processor and dsp processor.By free IP (the Intel lectual Property) nuclear that ALTERA company provides, in FPGA, can create interface functions such as UART, SRAM, SDRAM.

Long-range biometric image library module 3 because the FLASH memory span of device inside is less, stores part biometric image sample commonly used among the FLSAH, can expand use by long-range biometric image storehouse.

Display module 4 as a result, provide the Chinese liquid crystal display screen of a 128*64 to be used for the demonstration of recognition result and system debug information.

Power module 5, because fpga chip needs+5v direct supply, power module is given the image processing system module for power supply by the power supply access interface, therefore by inserting civil power after the voltage stabilizing.

In a kind of embedded personal identification device of the present utility model, the external static storer that uses has EPCS config memory 9, FLASH storer 10, static memory has the function that data are preserved, so EPCS config memory 9, store the preparation information of SOPC system and the data message of device operation in the FLASH storer 10, at every turn after the device energising, configuration information meeting initialization FPGA, in FPGA, realize Nios II processor and dsp processor respectively, micro OS and various control program have been implanted at Nios II processor, implanted image Preprocessing Algorithm and image matching algorithm supervisor at dsp processor, and the program among the FLASH called among the dynamic storage SDRAM11 carry out.

Beneficial effect: the utility model mainly provides a kind of embedded equipment, make this device have the function of part computing machine, break away from tional identification equipment and needed the control of PC, adopted the embedded system of the soft nuclear technology exploitation of Nios II to adjust at any time according to user's demand, the loss of having avoided update processor to regenerate and bring, the processor cost is lower simultaneously, for most of users, the cost of the shared logical resource of Nios II is greatly about about 15 yuans, the high integration of fpga chip makes this device smaller and more exquisite, is easy to carry.This device can be widely used in carrying out the occasion of personal information authentication, the fingerprint locker of using as home-use Fingerprint Lock, market, fingerprint ATM cash dispenser that bank uses or the like, this device not only is confined to the identification of fingerprint simultaneously, needs only for other characteristics of image to change corresponding handling procedure.This device also can make with FPGA to be that the embedded system of representative plays a greater role at computer safety field, for further developing of computer security lays the foundation.

Below in conjunction with the drawings and specific embodiments the utility model further is described in detail, but not as to qualification of the present utility model.

Description of drawings

Fig. 1 is the system architecture diagram of the utility model biometric devices;

Fig. 2 is the system construction drawing of the SOPC programmable system on chip processing module 2 of the utility model biometric devices;

Fig. 3 is the using method process flow diagram of the utility model biometric devices;

Among the figure: 1. physical characteristics collecting module, 2.SOPC programmable system on chip processing module, 3. long-range biometric image library module, 4. display module as a result, 5. power module, 6.FPGA chip, 7.Avalon bus, 8.50M active crystal oscillator, 9.EPCS config memory, 10.FLASH storer, 11.SDRAM storer, 12. configuration interface, 13. communication interfaces.

Embodiment

As depicted in figs. 1 and 2, a kind of embedded personal identification device of the present utility model is by physical characteristics collecting module 1, SOPC programmable system on chip processing module 2, long-range biometric image library module 3, display module 4 and power module 5 are formed as a result.Wherein, described SOPC programmable system on chip processing module 2 is made up of fpga chip 6, the active crystal oscillator 8 of Avalon bus7,50M, EPCS config memory 9, FLASH storer 10, SDRAM storer 11, configuration interface 12, communication interface 13 etc.; SOPC programmable system on chip processing module 2 is connected with display module 4 as a result with physical characteristics collecting module 1 respectively by USB interface, also is connected with long-range biometric image storehouse 3 by Ethernet interface or wireless network; Power module 5 gives SOPC programmable system on chip processing module 2 power supplies by power interface; In SOPC programmable system on chip processing module 2, fpga chip 6 is connected with LCD display 4, physical characteristics collecting camera 1, the active crystal oscillator 8 of 50M, EPCS config memory 9, FLASH storer 10, SDRAM storer 11, configuration interface 12, communication interface 13 respectively by Avalon bus7.

Wherein, physical characteristics collecting module 1 adopts existing high-resolution camera to realize, is responsible for the collection of biometric image, and is transferred to image processing system.

SOPC programmable system on chip processing module 2 is responsible for carrying out pre-service, the recognition function of biometric image, realizes identification.Specifically implement face Fig. 2 content as follows.

Long-range biometric image library module 3 can be realized by a remote database server, can be connected with device by Ethernet or wireless network.

Display module 4 as a result, provide the Chinese liquid crystal display screen of a 128*64 to be used for the demonstration of recognition result and system debug information.

Power module 5, by the stabilized voltage supply interface 220V alternating current is converted to+the 5V direct current offers device, provides 3.3V or 1.5V to each working cell power supply by device.

Be illustrated in figure 2 as the SOPC programmable system on chip processing module of biometric devices and the system construction drawing of fpga chip.

Fpga chip 6, model is CycloneII, can realize a plurality of Nios II processors, a plurality of embedded multipliers are arranged, can realize the hardware dsp processor, carry out high speed image and handle, wherein Nios II processor can adopt SOPC Builder to customize realization, and dsp processor can adopt DSP Builder to customize realization.

Avalon bus 7 is made up of data, address and control signal and arbitrated logic, uses it the peripheral hardware of system module can be coupled together.

LCD display 4 is the realization of display module as a result, and the character mode lcd display screen of 128*64 is used for identification result's demonstration, shows Debugging message during system debug.

Physical characteristics collecting camera 1 is the realization of physical characteristics collecting module, can adopt existing high resolving power digital camera head.Be used for monitoring outside input, be connected to SOPC system USB interface by the USB cable and carry out the transmission of image.

The active crystal oscillator 8 of 50MHz provides an external clock input for Nios II by active crystal oscillator, is connected to FPGA special clock pin clkin end.

EPCS config memory 9, the 1Mbit capacity is used for the storage of SOPC system configuration information.Because fpga chip is based on the SRAM technology, configuration information will be lost after each power down, therefore need provide sheet outer config memory.EPCS is a special-purpose FLASH storer in essence, is used to preserve the configuration information of FPGA, and it can lost content after power down.

FLASH storer (quick erasable flash memory) 10, the 8Mbit capacity, the configuration information if EPCS is unable to hold, then program and data can be placed among the outside FLASH.FLASH also is used to the part biological feature samples in the memory storage simultaneously.

SDRAM storer (stochastic and dynamic storer) 11, the 8Mbit capacity if user program is too big, has surpassed the maximum internal RAM capacity of FPGA interior customization, then can be placed among the SDRAM and carry out.

Configuration interface 12 comprises the JTAG configuration interface, each one AS serial type pattern interface, be used for the read-write of EPCS, FLASH, when systemic-function changes, can be burnt to program and the online data revised in the storer by this interface, do not influence the normal use of device.

Communication interface 13, comprise USB interface, GPRS/3G wireless communication interface and Ethernet mouth, can directly be connected, or communicate by letter with miscellaneous equipment by the USB Bluetooth adapter with computer, also can communicate simultaneously, be connected to remote server and get on other public network.

Be a kind of embedded personal identification method process flow diagram of the present utility model as shown in Figure 3, idiographic flow is as follows:

System initialization: after will installing the energized energising, device at first will carry out system initialization, can write FPGA to configuration information from the exterior arrangement storer by the SOPC system that realizes based on FPGA, carries out initialization, and the function of initialization physical characteristics collecting device, wait for the input of biological characteristic.

Image acquisition: in case when the image processing system processor receives the interrupt request of biometric image input, the physical characteristics collecting camera is finished the function of image acquisition, and the image that collects is delivered to image processing system in the SOPC programmable system on chip.

Feature extraction: the image processing module of SOPC programmable system on chip just carries out pre-service to image, carries out feature extraction.

Compare with image in the FLASH: the image processing module of SOPC programmable system on chip compares the image pattern feature of characteristics of image and the storage of FLASH store memory, judge whether user identity conforms to existing feature, when with device in biometric image in the sample storage when mating, provide recognition result.

Compare with the remote image storehouse: when with device in biometric image in the sample storage when not matching, can continue to be connected in the remote image sample database server and compare by IP cable network or GPRS wireless network, if can find the image of coupling, then provide recognition result, carry out next step operation.

Preserve image:, then can as required new image be kept in the remote image sample database server if still do not find the image of coupling.

Claims (2)

1. embedded personal identification device is characterized in that: this device is by physical characteristics collecting module (1), SOPC programmable system on chip processing module (2), long-range biometric image storehouse (3), display module (4), power module (5) are formed as a result; Wherein, described SOPC programmable system on chip processing module (2) is made up of fpga chip (6), Avalon bus (7), the active crystal oscillator of 50M (8), EPCS config memory (9), FLASH storer (10), SDRAM storer (11), configuration interface (12), communication interface (13) etc.; SOPC programmable system on chip processing module (2) is connected with display module (4) as a result by USB interface and physical characteristics collecting module (1), be connected with long-range biometric image storehouse (3) by Ethernet interface or wireless network, power module (5) is given SOPC programmable system on chip processing module (2) power supply by power interface; In SOPC programmable system on chip processing module (2), fpga chip (6) is connected with LCD display (4), physical characteristics collecting camera (1), the active crystal oscillator of 50M (8), EPCS config memory (9), FLASH storer (10), SDRAM storer (11), configuration interface (12), communication interface (13) respectively by Avalon bus (7).

2. a kind of embedded personal identification device according to claim 1, it is characterized in that: described SOPC programmable system on chip processing module (2) is made up of fpga chip (6) and peripheral interface circuit, by the SOPC technology a plurality of Nios II processors, dsp processor and internal storage etc. all are integrated in the fpga chip (6), have realized embedded system based on FPGA.

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