CN202596325U - Electronic lock based on fingerprint image identification - Google Patents
Electronic lock based on fingerprint image identification Download PDFInfo
- Publication number
- CN202596325U CN202596325U CN 201220079236 CN201220079236U CN202596325U CN 202596325 U CN202596325 U CN 202596325U CN 201220079236 CN201220079236 CN 201220079236 CN 201220079236 U CN201220079236 U CN 201220079236U CN 202596325 U CN202596325 U CN 202596325U
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- fingerprint
- lock
- fingerprint image
- inner casing
- dead bolt
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Abstract
The utility model discloses an electronic lock based on fingerprint image identification. The electronic lock comprises a fingerprint collection device (1), an electric control device (2), a power supply device (3), a handle (4), a lock core (5), a lock tongue (6), an inner shell (7) and an outer shell (8). The finger collection device collects a fingerprint image; the power supply device supplies power for a fingerprint lock, and a dry battery or another direct current power supply can be adopted; the turning of the handle drives a mechanical transmission mechanism to act, enabling the lock tongue to be drawn into the inner shell; the lock core is a traditional key lock core, and is used as an unlocking method in reserve when the fingerprint lock cannot be used due to a power supply fault or other faults; when the lock tongue is drawn into the inner shell, the lock is in an unlocked state, and when the lock tongue is not drawn into the inner shell, the lock is in a locked state; and the lock can be fixed in a mounting position by the inner shell and the outer shell together with a screw. The electronic lock has high speed and high accuracy of characteristic matching.
Description
Technical field
The utility model belongs to the safety technological guard field, relates to technology such as image processing, pattern-recognition, automatic control, relates more specifically to a kind of electronic lock based on fingerprint image identification.
Background technology
Electronic password lock is called for short electronic lock; Electronic password lock with anti-theft alarm function replaces the traditional mechanical coded lock; Overcome that the mechanical code lock number of password is few, the shortcoming of poor safety performance, coded lock is still all improved a step on performance technically greatly.
Electronic lock is a core with the microprocessor, is equipped with corresponding hardware circuit, accomplishes setting, storage, identification, demonstration, the driving electromagnetic actuator of password and detects alarm signal that its driving current value, receiving sensor send here, sends merit such as data.
Operating principle is that microprocessor receives the code of keying in substantially, and compares with the password that is stored among the EEPROM, if password is correct, then drives electromagnetic actuator and unblanks; If password bad then allows operating personnel to re-enter password, can import at most three times; If three times all incorrect, then microprocessor is reported to the police to intelligent monitor through communication line.Simultaneously, microprocessor with each unlock operation with this moment electromagnetic actuator driving current value send to intelligent monitor as status information, the warning message that will receive simultaneously from sensor interface also sends to intelligent monitor, as the foundation of intelligent analysis.
Different according to the input pin mode, electronic lock can be divided into following several types:
(1) keyswitch type electronic lock: adopt keyboard (or combination button) input unlocking cipher, easy to operate.Internal control circuit often adopts the electronic lock special IC.
(2) dial-type electronic lock: adopt mechanical dial switch input unlocking cipher.Many keyswitch type electronic locks can be transformed into the dial-type electronic lock.
(3) electron key formula electronic lock: use electron key input (or conduct) unlocking cipher.Electron key is the important component part that constitutes control circuit.Electron key can be formed by components and parts or by the element circuit that components and parts constitute, and makes the small hand-held unit form.The contact of electron key and governor circuit can be various ways such as sound, light, electromagnetism.
(4) touch type electronic lock: adopt touch method input unlocking cipher, simple to operate.With respect to key switch, the soft-touch control long service life, cost is low, has therefore optimized electronic lock control circuit.
(5) biological characteristic formula electronic lock: human body biological characteristics such as sound, iris, fingerprint are imported as password, carried out pattern-recognition control by computer and unblank, intellectuality is quite high.
Electronic lock based on fingerprint image identification is high because of intelligent degree, and becomes one of important directions of current electronic lock research and development.Fingerprint Lock generally comprises fingerprint acquisition device and electric control lock two parts; Existing fingerprint acquisition device is generally all gathered fingerprint characteristic with optical principle, after the comparison checking, and devices such as motor in the startup electric control lock or electromagnet; Behaviour's zip tongue, locking bolt action, the opening and closing of control lockset.
Part Fingerprint Lock product in use exists the problem that recognition time is long, recognition accuracy is low, has hindered the large tracts of land of Fingerprint Lock and has promoted and use.
The performance of Fingerprint Lock depends on the high efficiency and the reliability of algorithm for recognizing fingerprint to a great extent.
Algorithm for recognizing fingerprint mainly solves two problems, feature extraction and characteristic matching.Feature extraction utilizes image process method that one width of cloth fingerprint image is carried out feature extraction exactly, and extracting useful characteristic information, to be stored as later identification of fingerprint ready; Characteristic matching is meant fingerprint template in existing fingerprint image and the fingerprint characteristic storehouse compared and determines whether from same finger.
The utility model content
In order to improve the performance of Fingerprint Lock, promptly shorten recognition time, improve recognition accuracy, the utility model discloses a kind of electronic lock based on fingerprint image identification.
As shown in Figure 1, comprise like the lower part: fingerprint acquisition device (1), electric control gear (2), supply unit (3), handle (4), core (5), dead bolt (6), inner casing (7), shell (8);
Fingerprint acquisition device is gathered fingerprint image;
Supply unit is supplied power to Fingerprint Lock, can adopt dry cell or other dc sources;
The action of handle rotating band motivation tool transmission mechanism makes dead bolt take in inner casing;
Core is the traditional key core, when Fingerprint Lock during because of power failure or other faults, and subsequent use method for unlocking;
During dead bolt income inner casing, lockset is an open mode, and when dead bolt was not taken in inner casing, lockset was a locking state;
Inner casing and shell cooperate screw can lockset be fixed on the installation site.
Above-mentioned fingerprint acquisition device (1) is one of critical component of Fingerprint Lock, is made up of photo-electric, condenser type, pressure sensitive or ultrasonic sensor, and its performance parameter directly has influence on the performance of lockset.
Above-mentioned electric control gear (2) is one of critical component of Fingerprint Lock, shown in accompanying drawing 2, comprises like the lower part: digital signal processor (21), memory (22), motor (23), electromagnet (24);
Digital signal processor (21) is a core processor, receives the fingerprint image that fingerprint acquisition device is gathered, and operation algorithm for recognizing fingerprint (25) is accomplished fingerprint image characteristics and extracted with fingerprint image characteristics and mate, and sound and light alarm is also communicated by letter with the external world;
Memory (22) and digital signal processor swap data, main program, initialization subroutine and the algorithm for recognizing fingerprint program of storage digital signal processor, storage fingerprint image characteristics database;
Motor (23) is by DSP CONTROL, and it moves through Worm and worm-wheel gearing and drives a part of dead bolt motion, makes this part dead bolt can take in inner casing;
Electromagnet (24) is by DSP CONTROL, and the tension force that its motion overcomes spring mechanism drives remainder dead bolt income inner casing.
Algorithm for recognizing fingerprint comprises two parts: off-line part (251) and online part (252), and as shown in Figure 3;
Off-line part (251) is at first gathered fingerprint image, and carries out the image preliminary treatment, carries out feature extraction with certain algorithm then, and removes the pseudo-characteristic point, deposits these characteristics in database at last;
Online part (252) is at first gathered fingerprint image, and carries out the image preliminary treatment, carries out feature extraction with identical algorithm then; And removal pseudo-characteristic point; The characteristic that from database, takes the fingerprint is simultaneously compared with it, judges whether it is identical fingerprint, exports matching result at last.
Set up the fingerprint template database, whole validity feature points of image that each template stores is extracted, wherein each characteristic point storage its type year nType and coordinate figure (x, y).
The original fingerprint image is carried out preliminary treatment, then its characteristic point is stored, can reduce the data volume that to preserve effectively, shorten the time of storage and reading database, thereby improve the speed of characteristic matching.
After obtaining comprising the feature point set of many pseudo-characteristic points, pseudo-characteristic point algorithm is removed in operation, can remove a large amount of pseudo-characteristic points effectively, thereby improves the accuracy of characteristic matching.
Description of drawings
Fig. 1 is the system construction drawing of the utility model.
Fig. 2 is the electric control gear structure chart of the utility model.
Fig. 3 is the algorithm for recognizing fingerprint flow chart of the utility model.
The specific embodiment
Fingerprint acquisition device adopts the FPS200 fingerprint sensor of Veridicom company, obtains fingerprint image through direct contact fingerprint line face.
The FPS200 fingerprint sensor includes the sensor array of 300 row * 256 row, and what interrelate with each row is two sampling hold circuits.Fingerprint image acquisition is gathered delegation at every turn, and row collection is taken place by two stages each time.Phase I, the capacitor array of the row of being gathered is a vdd voltage by pre-charge, and in pre-charging stage, internal signal allows first sampling hold circuit to preserve the pre-charge voltage of this row; Second stage, the capacitor array discharge of being gathered row, the discharge magnitude of each sensor unit is proportional to discharge current.Through after the regular hour, internal signal allows the voltage across poles after second batch of sampling hold circuit preserved discharge again.According to twice interelectrode voltage difference, just can measure the size of electric capacity, then capacitance is carried out the A/D conversion, just can obtain the capacitance that each row fingerprint ridge and paddy form.After all provisional capitals had been gathered, these digital quantities were just as the digital quantity of gathering fingerprint image.
Digital signal processor adopts the TMS series LF2407 processor of TI company.
LF2407 is as the SPI master controller, and from equipment, LF2407 obtains the fingerprint image data that FPS200 gathers through the SPI interface to FPS200 as SPI.At this moment, 10 frame/seconds of FPS200 picking rate, the highest 115200b/s of data transmission rate.
The fingerprint image that FPS200 gathers exists noise to a certain degree; Noise can make image quality decrease, causes image blurringly, even floods fingerprint characteristic; Bring difficulty for later characteristic matching; Therefore before carrying out feature extraction, must carry out preliminary treatment, comprise filtering and enhancing etc. fingerprint image.
The foregoing description limits the utility model never in any form, and every employing is equal to the technical scheme that replacement or the mode of equivalent transformation obtain and all drops in the protection domain of the utility model.
Claims (4)
1. the electronic lock based on fingerprint image identification comprises fingerprint acquisition device (1), electric control gear (2), supply unit (3), handle (4), core (5), dead bolt (6), inner casing (7), shell (8); Fingerprint acquisition device is gathered fingerprint image; Supply unit is supplied power to Fingerprint Lock, can adopt dry cell or other dc sources; The action of handle rotating band motivation tool transmission mechanism makes dead bolt take in inner casing; During dead bolt income inner casing, lockset is an open mode, and when dead bolt was not taken in inner casing, lockset was a locking state; Inner casing and shell cooperate screw can lockset be fixed on the installation site; It is characterized in that: fingerprint acquisition device (1) is made up of photo-electric, condenser type, pressure sensitive or ultrasonic sensor; Electric control gear (2) comprises digital signal processor (21), memory (22), motor (23), electromagnet (24).
2. electronic lock according to claim 1; It is characterized in that: digital signal processor (21) is a core processor; Receive the fingerprint image that fingerprint acquisition device is gathered; Operation algorithm for recognizing fingerprint (25) is accomplished fingerprint image characteristics and is extracted with fingerprint image characteristics coupling, sound and light alarm and with the external world and communicate by letter.
3. electronic lock according to claim 1 is characterized in that: motor (23) is by DSP CONTROL, and it moves through Worm and worm-wheel gearing and drives a part of dead bolt motion, makes this part dead bolt can take in inner casing.
4. according to claim 1 or 3 described electronic locks, it is characterized in that: electromagnet (24) is by DSP CONTROL, and its motion overcomes the tension force of spring mechanism, drives remainder dead bolt income inner casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220079236 CN202596325U (en) | 2012-03-04 | 2012-03-04 | Electronic lock based on fingerprint image identification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220079236 CN202596325U (en) | 2012-03-04 | 2012-03-04 | Electronic lock based on fingerprint image identification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202596325U true CN202596325U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220079236 Expired - Fee Related CN202596325U (en) | 2012-03-04 | 2012-03-04 | Electronic lock based on fingerprint image identification |
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| Country | Link |
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| CN (1) | CN202596325U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535985A (en) * | 2012-03-04 | 2012-07-04 | 南京理工大学常熟研究院有限公司 | Electronic lock based on fingerprint image identification |
| CN105332565A (en) * | 2015-12-16 | 2016-02-17 | 马健 | Intelligent control assembly suitable for being additionally installed on mechanical lock and mechanical lock with intelligent control assembly |
| CN105484576A (en) * | 2013-03-15 | 2016-04-13 | 品谱股份有限公司 | Wireless lockset with integrated antenna, touch activation, and light communication method |
| CN106617773A (en) * | 2016-11-23 | 2017-05-10 | 丽水市人民医院 | Hazardous medicine preservation cabinet with anti-theft authorization |
| CN109064594A (en) * | 2018-07-18 | 2018-12-21 | 江苏华维电力科技有限公司 | A kind of lock controller for substation |
| CN111554010A (en) * | 2020-04-26 | 2020-08-18 | 欧菲微电子技术有限公司 | Unlocking device and method of ultrasonic fingerprint door lock and intelligent door lock |
-
2012
- 2012-03-04 CN CN 201220079236 patent/CN202596325U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535985A (en) * | 2012-03-04 | 2012-07-04 | 南京理工大学常熟研究院有限公司 | Electronic lock based on fingerprint image identification |
| CN105484576A (en) * | 2013-03-15 | 2016-04-13 | 品谱股份有限公司 | Wireless lockset with integrated antenna, touch activation, and light communication method |
| CN105484576B (en) * | 2013-03-15 | 2019-07-23 | 品谱股份有限公司 | With wireless locksets that are antenna integrated, touching activation and optical communication device |
| US11408201B2 (en) | 2013-03-15 | 2022-08-09 | Spectrum Brands, Inc. | Wireless lockset with integrated antenna, touch activation, and light communication method |
| US11408202B2 (en) | 2013-03-15 | 2022-08-09 | Spectrum Brands, Inc. | Wireless lockset with integrated antenna, touch activation, and light communication method |
| US11913252B2 (en) | 2013-03-15 | 2024-02-27 | Assa Abloy Americas Residential Inc. | Wireless lockset with touch activation |
| CN105332565A (en) * | 2015-12-16 | 2016-02-17 | 马健 | Intelligent control assembly suitable for being additionally installed on mechanical lock and mechanical lock with intelligent control assembly |
| CN106617773A (en) * | 2016-11-23 | 2017-05-10 | 丽水市人民医院 | Hazardous medicine preservation cabinet with anti-theft authorization |
| CN109064594A (en) * | 2018-07-18 | 2018-12-21 | 江苏华维电力科技有限公司 | A kind of lock controller for substation |
| CN111554010A (en) * | 2020-04-26 | 2020-08-18 | 欧菲微电子技术有限公司 | Unlocking device and method of ultrasonic fingerprint door lock and intelligent door lock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20200304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |