CN102693569A - Intelligent access control system based on radio frequency identification and working method thereof - Google Patents
Intelligent access control system based on radio frequency identification and working method thereof Download PDFInfo
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- CN102693569A CN102693569A CN2012101634522A CN201210163452A CN102693569A CN 102693569 A CN102693569 A CN 102693569A CN 2012101634522 A CN2012101634522 A CN 2012101634522A CN 201210163452 A CN201210163452 A CN 201210163452A CN 102693569 A CN102693569 A CN 102693569A
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Abstract
The invention discloses an intelligent access control system based on radio frequency identification and a working method thereof. The system mainly comprises a radio frequency identification reader, an external antenna, RFID (radio frequency identification) tags and a background radio frequency signal processing server. The working method includes: arranging RFID tag arrays in a monitoring area, utilizing characteristics that wireless radio frequency signals reflected by the tags attenuate when shielded by passer-bys to sense mobility patterns of an object according to the law of signal attenuation of the RFID tag arrays, and displaying and recording getting-in-and-out of personnel within the system in real time by identification of the RFID tags worn by users. The intelligent access control system based on the radio frequency identification and the working method thereof effectively improve the automation level of user identification and relieve physical space constraints brought to people by conventional access control systems, and in-and-out record monitoring of personnel can be provided efficiently by a real-time display system.
Description
Technical field
The present invention relates to a kind of intelligent access control system; Specifically be a kind of based on REID; Utilize RF identification non-contact type wireless transmission feature; Through in physical space, disposing with reference to the RF tag array and analyzing the human body correlation interference characteristic of signal frequently, realize the intelligent access control system and the method for work thereof of contactless identification.
Background technology
Intelligent access control system is a kind of novel modernized safety management system, and its collection microcomputer automatic identification technology and modern safety management measure are one, relate to electronics, machinery, optics, computer technology, mechanics of communication, many new technologies such as biotechnology.
Existing intelligent access control system can be divided into following three major types by the turnover RM:
1, password identification
Whether correctly discern the turnover authority through check input password.This series products is easy to operate, and shortcoming is that password is revealed easily, and security is still not high and do not have a turnover record.
2, card identification
Discern the turnover authority through Card Reader or Card Reader encrypted code mode, comprise magnetic card and radio-frequency card, advantage be card difficulty be replicated, shortcoming is that cost is higher, card is used by others easily, security is not high yet,
3, bio-identification
Discern turnover through modes such as reviewer's biological characteristics, finger pattern is arranged, iris type, face recognition type.Advantage is that security is fabulous from the identification angle; Need not carry card, shortcoming: cost is very high, the problem that exists identification to be prone to make mistakes simultaneously.
Along with the proposition of " Internet of Things " notion, be that a series of Internet of Things core technologies of representative have obtained development apace with RF identification (RFID) technology, based on contactless, quick, the technological extensive concern that caused of efficient identification of RFID technology.How REID being introduced intelligent access control system, improve the automaticity of user identity identification, alleviate the conventional door access control system to the physical space constraint that people bring, is the direction that those skilled in the art make great efforts.
Summary of the invention
Technical matters to be solved by this invention provides a kind of radio frequency signal decay characteristics of utilizing, and carries out the intelligent access control system and the method for work thereof of personnel identity identification and mobile behavior pattern-recognition in real time, efficiently.
A kind of intelligent access control system based on REID, this system mainly is made up of radiofrequency signal acquisition front end and radiofrequency signal processing server two parts; Wherein, the radiofrequency signal acquisition front end comprises:
Radio-frequency identification reader:, send it back the radiofrequency signal processing server on backstage in real time with the RFID tag array signal that collects and through personal identification information through the RF identification external antenna;
RF identification external antenna:, the signal that reflects from array is received and send to radio-frequency identification reader effectively to RFID tag array emission electromagnetic signal;
The RFID tag array: being oppositely arranged with the RF identification external antenna, is the gate control system passage between the two, and the RFID tag array is formed the referential array of a mobile behavior identification through some RFID tags rational deployment in physical space;
Backstage radiofrequency signal processor comprises:
Mobile behavior mode detection engine: the signal that received RF identification reader sends, according to the signal variation characteristic of RFID tag array, the direction of real-time judge personnel movement promptly gets into and still leaves;
Real-time monitoring display interface: utilize mobile behavior direction evaluation algorithm, in real time display monitoring information.
In addition, the present invention also provides the method for work of this intelligent access control system, and its job step is:
1) running environment of initialization system; Start radio-frequency identification reader; Between RF identification external antenna and RFID tag array, set up radio-frequency field; Through the situation that whether exists label to lose in the current RFID tag array of real-time detection, judge whether the current running status of system is good;
2) radio-frequency identification reader is through RF identification external antenna continuous sweep RFID tag array; Because human body about 70% all is to be made up of water; And water has absorption to radiofrequency signal; In the time of personnel's process gate control system passage, that part of label that is blocked by human body can go out the situation of active; In case detect the situation that label is lost, label drop-out that radio-frequency identification reader is about to collect and process personal identification information send to the radiofrequency signal processing server on backstage;
3) the radiofrequency signal processing server assigns mobile behavior mode detection engine that the label drop-out of losing is further handled, and result returns to backstage radiofrequency signal processing server immediately;
4) if the result who returns gets into or leaves; To trigger real-time monitoring display interface and refresh current record; If carried the system authorization label through personnel; All tag numbers are taken out in the monitoring display interface from the current authorization labels tabulation that collects in real time, through inquiring about local mapping table, show when the essential information and the photo that advance into or leave personnel.If do not carry the system authorization label through personnel, monitoring interface shows visitor's record.
Above-mentioned steps 1) in, more serious if the referential array label is lost phenomenon, direction through regulating the RF identification external antenna and the label position in the RFID tag array are calibrated, and in detecting the RFID tag array, rarely have label to lose.
As improvement of the present invention, radio-frequency identification reader uses the partial cache strategy to the tag recognition information that collects, and guarantees reliable bottom layer signal is consigned to the radiofrequency signal processing server, thereby correctly analyzes and handle.
The present invention is through the signal attenuation characteristics with reference to the RFID tag array, the direction that detected object moves; Simultaneously, can realize personnel identity identification fast through identification to authorization labels.For the user provide intuitively, fast, gate inhibition's monitor service efficiently.Compare with traditional gate control system, the maximum characteristics of the present invention are: utilize the RFID technology that user's mobile behavior pattern has been realized effective perception, system need not the user and wears the RFID label and just can realize the intelligent perception to moving direction.In addition, personnel only need carry and authorize RF tag just can realize clog-free identification and checking in the system, also can real-time perception for personnel's outside the system that does not wear label turnover behavior, greatly simplified the identifying of gate control system.Simultaneously, through the analysis of historical record, can be from many aspects analyst's turnover behavioral characteristic.
Conclude and get up to have following advantage:
1) directly perceived: show personnel's in the current system essential information, photo etc. in real time through monitoring interface.
2) quick: the user only need carry the label of mandate, need not to carry out special operational through system, and the physical constraint of conventional door access control system to personnel avoided in the turnover behavior of the automatic recording user of system's meeting.
3) efficient: for many people situation of process simultaneously, system also can carry out work well.
Description of drawings
The scene structure figure of Fig. 1 system of the present invention,
Fig. 2 system data flow graph.
Embodiment
1, system's scene
Like Fig. 1, intelligent access control system of the present invention mainly is made up of the radiofrequency signal processor two parts on radiofrequency signal acquisition front end and backstage.Wherein the radiofrequency signal acquisition front end is made up of following components: radio-frequency identification reader, RF identification external antenna, RFID tag array.The backstage radiofrequency signal is handled and is divided into two parts: mobile behavior mode detection engine and real-time monitoring display interface.The each several part function is following:
Radio-frequency identification reader: through external antenna, the reference label array signal that in real time antenna is collected sends it back backstage radiofrequency signal processing server according to certain trigger mechanism.Reader uses the partial cache strategy to the tag recognition information that collects, and guarantees reliable bottom layer signal is consigned to backstage radiofrequency signal processor, thereby correctly analyzes and handle.
The RFID tag array: external antenna receives the signal of returning from tag reflection to RFID tag array emission electromagnetic signal effectively.
The RFID tag array: RFID tag is formed the referential array of a mobile behavior identification through rational deployment in physical space.As shown in Figure 1; Tag array is divided into two rows, and physical space length is about one meter five, altogether 15 reference label; Eight numberings of last row are respectively: 1,3,5,7,9,11,13,15, and seven numberings of following row are respectively: 2,4,6,8,10,12,14.
Mobile behavior mode detection engine: according to tag array signal variation characteristic, the direction of real-time judge personnel movement promptly gets into and still leaves.
Real-time monitoring display interface: utilize mobile behavior direction evaluation algorithm, display monitoring information in real time comprises authorization labels personnel's photo, salutatory, personnel's essential information etc.
Fig. 2 is the system data flow graph.Radio-frequency identification reader writes down the current tag number that scans with the sweep frequency of per second four times.Tag array is divided into two rows, and physical space length is about one meter five, 15 reference label altogether, on arrange eight numberings and be respectively: 1,3,5,7,9,11,13,15, seven numberings of following row are respectively: 2,4,6,8,10,12,14.In the time of personnel's process, can shelter from the communication path of some label and antenna, cause some label in the reference label array to lose according to the certain rules characteristic.Reader sends it back the radiofrequency signal processing server with the tag recognition information list.The radiofrequency signal processing server calculates loses the tag number tabulation; To lose the tag number tabulation and submit to mobile behavior mode detection engine; This engine is based on the variation tendency of the tag number of losing on time sequencing: be from the trumpet to the large size, to change or from the large size to the trumpet, change, just can judge personnel's moving direction.In addition, in order to handle various turnover behaviors and the unsettled situation of label signal, mobile behavior mode detection engine guarantees the correctness that direction is judged through a whole set of robustness measure, comprising: average, mechanism such as setting threshold, unusual tag processes.This engine sends to real-time monitoring display interface with result.Simultaneously; The non-referential array label that the radiofrequency signal processing server will collect (being the label that the user carries) is submitted to the authorization labels information management module; The authorization labels information management module is through the local mapping table of inquiry; Confirm that this time turnover behavior is personnel's in the system record or visitor's record, and result is submitted to real-time monitoring display interface, and deposit turnover recorded information management holder in.Simultaneously, turnover recorded information administration module externally provides the query processing function, can check the turnover historical information and carry out further analyzing and processing.
The concrete application approach of the present invention is a lot, and the above only is a preferred implementation of the present invention, should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement, these improvement also should be regarded as protection scope of the present invention.
Claims (4)
1. the intelligent access control system based on REID is characterized in that, this system mainly is made up of radiofrequency signal acquisition front end and radiofrequency signal processing server two parts; Wherein, the radiofrequency signal acquisition front end comprises:
Radio-frequency identification reader:, send it back the radiofrequency signal processing server on backstage in real time with the RFID tag array signal that collects and through personal identification information through the RF identification external antenna;
RF identification external antenna:, the signal that reflects from array is received and send to radio-frequency identification reader effectively to RFID tag array emission electromagnetic signal;
The RFID tag array: being oppositely arranged with the RF identification external antenna, is the gate control system passage between the two, and the RFID tag array is formed the referential array of a mobile behavior identification through some RFID tags rational deployment in physical space;
Backstage radiofrequency signal processor comprises:
Mobile behavior mode detection engine: the signal that received RF identification reader sends, according to the signal variation characteristic of RFID tag array, the direction of real-time judge personnel movement promptly gets into and still leaves;
Real-time monitoring display interface: utilize mobile behavior direction evaluation algorithm, in real time display monitoring information.
2. method of work based on the intelligent access control system of REID is characterized in that job step is:
1) running environment of initialization system; Start radio-frequency identification reader; Between RF identification external antenna and RFID tag array, set up radio-frequency field; Through the situation that whether exists label to lose in the current RFID tag array of real-time detection, judge whether the current running status of system is good;
2) radio-frequency identification reader is through RF identification external antenna continuous sweep RFID tag array, and in the time of personnel's process gate control system passage, that part of label that is blocked by human body can go out the situation of active; In case detect the situation that label is lost, label drop-out that radio-frequency identification reader is about to collect and process personal identification information send to the radiofrequency signal processing server on backstage;
3) the radiofrequency signal processing server assigns mobile behavior mode detection engine that the label drop-out of losing is further handled, and result returns to backstage radiofrequency signal processing server immediately;
4) if the result who returns gets into or leaves; To trigger real-time monitoring display interface and refresh current record; If carried the system authorization label through personnel; All tag numbers are taken out in the monitoring display interface from the current authorization labels tabulation that collects in real time, through inquiring about local mapping table, show when the essential information and the photo that advance into or leave personnel
,If do not carry the system authorization label through personnel, monitoring interface shows visitor's record.
3. the method for work of the intelligent access control system based on REID according to claim 2; It is characterized in that; In the step 1); If it is more serious that the referential array label is lost phenomenon, direction through regulating the RF identification external antenna and the label position in the RFID tag array are calibrated, and in detecting the RFID tag array, rarely have label to lose.
4. according to the method for work of claim 2 or 3 described intelligent access control systems based on REID; It is characterized in that; Step 2) in; Radio-frequency identification reader uses the partial cache strategy to the tag recognition information that collects, and guarantees reliable bottom layer signal is consigned to the radiofrequency signal processing server, thereby correctly analyzes and handle.
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Cited By (4)
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| CN103208204A (en) * | 2013-05-07 | 2013-07-17 | 南京大学 | Parking lot stall monitoring system based on radio frequency identification technology and working method |
| CN105913521A (en) * | 2016-04-15 | 2016-08-31 | 中交上海三航科学研究院有限公司 | Personnel in and out management method, system and terminal equipment with system |
| CN110718003A (en) * | 2019-09-01 | 2020-01-21 | 天津大学 | Entrance and exit detection method based on RFID |
| CN114595711A (en) * | 2022-03-16 | 2022-06-07 | 天津大学 | Radio frequency tag authentication method based on direction sensitivity characteristic |
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| CN1866301A (en) * | 2005-05-20 | 2006-11-22 | 中国科学院自动化研究所 | Radio frequency identity card gate inhibition system combined with sensing technology |
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| CN103208204A (en) * | 2013-05-07 | 2013-07-17 | 南京大学 | Parking lot stall monitoring system based on radio frequency identification technology and working method |
| CN103208204B (en) * | 2013-05-07 | 2015-01-14 | 南京大学 | Parking lot stall monitoring system based on radio frequency identification technology and working method |
| CN105913521A (en) * | 2016-04-15 | 2016-08-31 | 中交上海三航科学研究院有限公司 | Personnel in and out management method, system and terminal equipment with system |
| CN110718003A (en) * | 2019-09-01 | 2020-01-21 | 天津大学 | Entrance and exit detection method based on RFID |
| CN110718003B (en) * | 2019-09-01 | 2021-12-17 | 天津大学 | Entrance and exit detection method based on RFID |
| CN114595711A (en) * | 2022-03-16 | 2022-06-07 | 天津大学 | Radio frequency tag authentication method based on direction sensitivity characteristic |
| CN114595711B (en) * | 2022-03-16 | 2023-08-11 | 天津大学 | Radio frequency tag authentication method based on direction sensitivity characteristics |
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Application publication date: 20120926 |