CN204595951U - A kind of access control system of view-based access control model - Google Patents
A kind of access control system of view-based access control model Download PDFInfo
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- CN204595951U CN204595951U CN201520203789.0U CN201520203789U CN204595951U CN 204595951 U CN204595951 U CN 204595951U CN 201520203789 U CN201520203789 U CN 201520203789U CN 204595951 U CN204595951 U CN 204595951U
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Abstract
The utility model discloses a kind of access control system of view-based access control model, comprise main circuit board, and the laser projector, the camera that are connected with main circuit board respectively, described main circuit board is connected with controlled gate inhibition; Main circuit board comprises main control chip, FIFO cache chip, TFT Liquid Crystal Module and driving circuit; After system energization, driving circuit is powered to modules, ensures system worked well; Camera catches picture, by pulse signal control automatically by picture stored in FIFO cache chip, then main control chip reads picture to cache chip and processes, and the most backward gate inhibition sends control signal; TFT Liquid Crystal Module is for the result that Shows Picture during system debug.Access control system of the present utility model, it adopts virtual inputting interface and graphical passwords, improves the disguise of input and the security of password.
Description
Technical field
The utility model relates to machine vision, field of human-computer interaction, particularly a kind of access control system of view-based access control model.
Background technology
Gate control system is also known as room entry/exit management control system (ACCESS CONTROL SYSTEM). and be the intellectualized management system of a kind of managerial personnel turnover. common gate control system has: password access system, card gate control system, bio-identification gate control system etc.Gate control system developed very fast in recent years, was widely used in management control system.
1) password access system: whether correctly identify turnover authority by inspection input password.The advantage of this kind of gate inhibition is easy to operate, and need not carry card, cost is low.Shortcoming is that password is easily revealed, and security is very poor, and button easily damages, malfunctioning.
2) card gate control system: identify turnover authority by Card Reader or Card Reader encrypted code mode, be divided into again by kind of cards:
1. magnetic card
Advantage: cost is lower; One people one blocks, and safety is general, can join microcomputer, have enabling record.
Shortcoming: card, equipment has wearing and tearing, and the life-span is shorter; Card easily copies; Card image is easily lost because of external magnetic field, makes card invalid.
2. radio-frequency card
Advantage: card and equipment contactless, open the door convenient and safe; Life-span is long, gross data at least ten years; Security is high, has enabling record.
Shortcoming: cost is higher, ID/IC card is cracked, and safety coefficient reduces.
3) bio-identification gate control system: identify turnover by modes such as reviewer's biological characteristics.There is finger pattern, iris type, face recognition type.The advantage of this type systematic: from identification angle security fabulous; Card need not be carried; Shortcoming: cost is very high.Discrimination is not high, high to environmental requirement, user is required that high (such as fingerprint can not scratch, eye can not be red and swollen hemorrhage, can not wound be had on the face, or a number of beard), use inconvenience (such as iris type with face recognition type, setting height(from bottom) position is certain, but the height of user is different.
Therefore be necessary to provide a kind of new access control device to meet the demand of people.
Utility model content
The purpose of this utility model is that the shortcoming overcoming prior art is with not enough, and provide a kind of access control system of view-based access control model, it adopts virtual inputting interface and graphical passwords, improves the disguise of input and the security of password.
The purpose of this utility model is realized by following technical scheme:
An access control system for view-based access control model, comprises main circuit board, and the laser projector, the camera that are connected with main circuit board respectively, and described main circuit board is connected with controlled gate inhibition; Main circuit board comprises main control chip, FIFO cache chip, TFT Liquid Crystal Module and driving circuit; After system energization, driving circuit is powered to modules, ensures system worked well; Camera catches picture, by pulse signal control automatically by picture stored in FIFO cache chip, then main control chip reads picture to cache chip and processes, and the most backward gate inhibition sends control signal; TFT Liquid Crystal Module is for the result that Shows Picture during system debug.
The frame speed that described camera catches picture is 30fps.
The model of described main control chip is STM32F103RET6, and the model of described FIFO cache chip is AL422B.
Principle of work of the present utility model is as follows:
When user presses load button, laser projector can go out keyboard profile in front projection;
When user's finger inputs on the virtual keyboard, the camera be positioned at above dummy keyboard detects the input trajectory of finger, the information detected is imported in the main control chip of main circuit board and process: after the picture that camera is caught reads in main control chip, first spot identification is carried out, the laser launched due to laser projector can produce reflection on nail, form hot spot, so the position of hot spot also just represents the possible position of finger in picture; Then filtering operation is carried out in possible to all hot spots position, by calculating the circularity of hot spot, filters out those speckle noises in irregular shape, thus obtains the position coordinates pointing hot spot; By pointing the position of hot spot, learning which button current time finger is positioned on, so just obtaining the input information of finger, after end of input, the input information of acquisition and the password of storage are mated;
If the password of input conforms to, then gate inhibition opens; If the password not match of input, then gate inhibition can not open.
Described password is graphical passwords, and graphical passwords adopts nine grids or 16 palace lattice, and different passwords has different length and shape.
Described graphical passwords is generated by laser projector, and the shape of generation is controlled by laser projector.The generation of graphical passwords can be selected by user, and graphical passwords longer in theory has higher security.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, the utility model is different from traditional gate inhibition, and maximum innovative point is without the need to physical keyboard entity, but on a virtual plane direct control, decrease the probability of hardware damage, also reduce cost.
2, the application of graphical passwords, different graphical passwords has different length and shape, breaches the restriction that traditional gate inhibition's numerical ciphers has regular length, improves the security of password to a certain extent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the access control system of view-based access control model described in the utility model;
Fig. 2 is the structural representation of the main circuit board of system described in Fig. 1;
Fig. 3 is the workflow diagram of system described in Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Fig. 1 is the structural representation of the virtual gate inhibition of view-based access control model, comprising: for gathering image information camera 1, by the movement locus pointed when obtaining input password, the information collected is imported in main control chip and is processed; System main circuit board 2, for processing the information of camera collection, and result exported, output information is used for the break-make of access control; The left end of simultaneity factor main circuit board 2 is equipped with a laser projector, for projecting keyboard profile; Graphical passwords input keyboard 3 adopts laser projection to realize, for carrying out Password Input.
As Fig. 1, a kind of access control system of view-based access control model, comprises main circuit board, and the laser projector, the camera that are connected with main circuit board respectively, and described main circuit board is connected with controlled gate inhibition; As Fig. 2, main circuit board comprises main control chip, FIFO cache chip, TFT Liquid Crystal Module and driving circuit; After system energization, driving circuit is powered to modules, ensures system worked well; Camera catches picture, by pulse signal control automatically by picture stored in FIFO cache chip, then main control chip reads picture to cache chip and processes, and the most backward gate inhibition sends control signal; TFT Liquid Crystal Module is for the result that Shows Picture during system debug;
The frame speed that described camera catches picture is 30fps;
The model of described main control chip is STM32F103RET6, and the model of described FIFO cache chip is AL422B.
As Fig. 3, a kind of workflow of access control system of view-based access control model is as follows:
When user presses load button, laser projector can go out keyboard profile in front projection;
When user's finger inputs on the virtual keyboard, the camera be positioned at above dummy keyboard detects the input trajectory of finger, the information detected is imported in the main control chip of main circuit board and process: after the picture that camera is caught reads in main control chip, first spot identification is carried out, the laser launched due to laser projector can produce reflection on nail, form hot spot, so the position of hot spot also just represents the possible position of finger in picture; Then filtering operation is carried out in possible to all hot spots position, by calculating the circularity of hot spot, filters out those speckle noises in irregular shape, thus obtains the position coordinates pointing hot spot; By pointing the position of hot spot, learning which button current time finger is positioned on, so just obtaining the input information of finger, after end of input, the input information of acquisition and the password of storage are mated;
If the password of input conforms to, then gate inhibition opens; If the password not match of input, then gate inhibition can not open.
Described password is graphical passwords, and graphical passwords adopts nine grids or 16 palace lattice, and different passwords has different length and shape.
Described graphical passwords is generated by laser projector, and the shape of generation is controlled by laser projector.
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (3)
1. an access control system for view-based access control model, is characterized in that: comprise main circuit board, and the laser projector, the camera that are connected with main circuit board respectively, and described main circuit board is connected with controlled gate inhibition; Main circuit board comprises main control chip, FIFO cache chip, TFT Liquid Crystal Module and driving circuit; After system energization, driving circuit is powered to modules, ensures system worked well; Camera catches picture, by pulse signal control automatically by picture stored in FIFO cache chip, then main control chip reads picture to cache chip and processes, and the most backward gate inhibition sends control signal; TFT Liquid Crystal Module is for the result that Shows Picture during system debug.
2. the access control system of view-based access control model according to claim 1, is characterized in that: the frame speed that described camera catches picture is 30fps.
3. the access control system of view-based access control model according to claim 1, is characterized in that: the model of described main control chip is STM32F103RET6, and the model of described FIFO cache chip is AL422B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520203789.0U CN204595951U (en) | 2015-04-03 | 2015-04-03 | A kind of access control system of view-based access control model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520203789.0U CN204595951U (en) | 2015-04-03 | 2015-04-03 | A kind of access control system of view-based access control model |
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| CN204595951U true CN204595951U (en) | 2015-08-26 |
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| CN201520203789.0U Expired - Fee Related CN204595951U (en) | 2015-04-03 | 2015-04-03 | A kind of access control system of view-based access control model |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867208A (en) * | 2015-04-03 | 2015-08-26 | 华南理工大学 | Vision-based access control system and method |
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2015
- 2015-04-03 CN CN201520203789.0U patent/CN204595951U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867208A (en) * | 2015-04-03 | 2015-08-26 | 华南理工大学 | Vision-based access control system and method |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20150826 Termination date: 20180403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |