Application scheme in entrance guard’s system of recognition technology of fingerprint
First, application characteristic of fingerprint recognition technology
The numerous one is used in the biological recognition technology that the identity verifies, the recognition technology of fingerprint is most convenient at present, reliable, encroach on and the solution of cheap price. Characteristic on fingerprint human body it is unique,it have sex, uniquenesses personal, can’t duplicating, privacies absolute, and their complexity is enough to offer enough characteristic used for distinguishing; If we want to increase dependability, we only need to register more fingerprint, distinguish more fingers. The fingerprint module performance loving Deere to develop is remarkable, it is very fast to scan the tempo of fingerprint, it is very convenient to use; While reading fingerprint, users only need to gather the living subject finger with fingerprint the head keep in touch each other, it is to read the most reliable method of biological characteristic of the human body to gather the head and contact with fingerprint directly.
Second, entrance guard’s tool to lock
In daily life, people are ubiquitous must use the tools to lock of various entrance guards. Come to say, mainly have key, password, magnetic stripe card and IC card from the control method of entrance guard’s tool to lock.
With the improvement of people’s living standard, this indispensable essential apparatus of entrance guard’s tool to lock has brought a lot of troubles to life too. Everybody throws the key ‘ Or forget) Experience,it want every day for reminding oneself to put well the key requiring mental skill, one clusters of keys heavy pieces of painful thing undoubtedly for thinking of the light person
And according to control method of the existing entrance guard’s tool to lock at present, there are certain potential safety hazards, the key, password and magnetic stripe card are easy to duplicate, steal; The security of the IC card is relatively high, but easy to lose. So, the tool to lock of entrance guard in the minds of people must have convenient, safe, esthetic characteristics now.
Third, entrance guard’s systematic summary of fingerprint
Entrance guard’s system refers to installing the electronic automatic recognition system of the intelligent card in the entrances and exits in the building because of the modern electron and information technology, through hold non- contact-type card come people correctly ‘ Or the thing) Business turn over implement release, refuse, record,etc. operate intelligent administrative system, control for the entrance guard of the gate, the attendance management, system of intellectual building, high security entrances and exits management, safe and convenient discrepancy of securities trading management are controlled, purpose its for effective control personnel ‘ Articles) Discrepancy,and details it record it is that all pass in and out,it last safety management against entrances and exits.
Register the fingerprint of personnel with this passway of discrepancy of authority in entrance guard’s system, only fingerprint proves that passes into, can enter, control the discrepancy of the confidential departments strictly, guarantee the security of goods and materials and property. Assign user’s fingerprint data in the corresponding entrance guard machine in the software of controlling of the entrance guard of the backstage supporter, can also upload the entrance guard to record in real time, produce entrance guard’s report form, offer basis on which the accident is traced.
Fourth, entrance guard’s systematic framework of fingerprint
According to key product, entrance guard’s system of fingerprint is loved Deere’s fingerprint to deal with module, user’s already existing control module, opening device and power system,etc. to make up.
4.1 systems make up
4.2 Liking dealing with the module in Deere’s fingerprint prove
Love Deere for made up of high performance digital signal processor DSP, large capacity FLASH and 300,000 picture element colored CMOSing fingerprint module. Concrete principle dealt with and discerned that the terminal products manufacturers of fingerprint do not need to understand fingerprint, only need to use and loving the fingerprint module of Deere directly, after MCU sends the order through interface of communication, the module of fingerprint can be finished corresponding fingerprint is input, fingerprint is dealt with, mean and spin proving and fingerprint than to the function.
System, entrance guard of fingerprint, change entrance guard systematic password or verification way of IC card originally into fingerprint of fashion prove way nowadays only. Let users not change any function of its product to improve its performance in of low input cases, have improved the cost performance of the products greatly.
4.2.1 Gather the head in fingerprint
Gather the total reflection principle that the head utilizes the miniature prism in fingerprint, the light source is reflected from the prism on the optical transducer. As people’s finger is pressed on the glass surface, change the surface of the miniature prism because the spine of fingerprint and pressure of valley are different; Reflect the light to get from the miniature prism, reflect the oil that all quantity depends on pressing among spine and depth, skin and glass of the valley of glass surface fingerprint. Through the picture preconditioning, digitization, grey level are dealt with, the picture strengthens and forms the fingerprint picture.
The corresponding technical indicator of the transducer:
The surface is hard to plate the glass of membrane
300,000 picture element colored CMOS
Resolution ratio 500dpi of the transducer;
The surface of transducer resists shock power and resists the ability of destroying: 4H pencil can assault for 1000 times and does not damage continuously within the range of 20cm.
4.2.2 DSP board
Get on the location machine and deal with the communication of the module with easy Deere’s fingerprint on 4.2.3
Fifth, entrance guard’s systematic characteristic of fingerprint
5.1 security
The changing the sex of fingerprint has determined with the uniqueness fingerprint is that the most low-priced, most reliable identity at present discerns the way, so utilize fingerprint to open the door safer.
5.2 accuracy
So long as users press the finger and can open the door lightly in time, accurately.
5.3 high stability
The independence works continuously, stability is good.
5.4 flexibility
Support multi-users, many groups to make up and open;
5.5 scientific process is managed
Divide period management, let management be scientific;
5.6 briefs on
Do not close the door to remind; Lose the electricity and point out the function;
5.7 can set up the warning finger
If someone is compelled and opened the door, use the warning finger to call the police. So as to protect the collective and personal safety of life and property.
5.8 is controlled long-rangely
Let outside your thousand li, can also manage at any time.
5.9 systems adopt differentiated control: Administrator and user.
Establish administration authority in the administrator step by step. Users’ fingerprint concentrates on central authorities’ managing the host computer to gather, store and manage the host computer in the central authorities. Open authority according to user, reach corresponding entrance guard plane under the fingerprint user.
Sixth, entrance guard’s systematic expandability of fingerprint
Entrance guard person who control can person who take off work, may network and manage too. The entrance guard manages and divides differently into in order to network entrance guard’s system and can’t network entrance guard’s system according to communication way. Person who network intellectual entrance guard control system lock by computer, communication converter, media reader, controller, card, cable ‘ Or infrared to penetrating, three rollers are transferred to the floodgate) Make up, can install TCP/IP agreement module additional and solve large-scale entrance guard’s systematic networking project according to customer’s demand.
fingerprint