CN102982586A - Electronic attendance system used by students - Google Patents
Electronic attendance system used by students Download PDFInfo
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- CN102982586A CN102982586A CN2012104808282A CN201210480828A CN102982586A CN 102982586 A CN102982586 A CN 102982586A CN 2012104808282 A CN2012104808282 A CN 2012104808282A CN 201210480828 A CN201210480828 A CN 201210480828A CN 102982586 A CN102982586 A CN 102982586A
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Abstract
The invention discloses an electronic attendance system used by students which comprises a student card and outlet/inlet radio-frequency transmitting equipment, wherein the outlet/inlet radio-frequency transmitting equipment comprises two radio-frequency transmitting antennae, and two radio-frequency transmitting antennae transmit different recognition signals at different time and with the same frequency; the student card comprises a radio-frequency receiving circuit, a microprocessor and a GSM (global system for mobile communications)/GPRS (general packet radio service) communication module, and the radio-frequency receiving circuit and the GSM/GPRS communication module are respectively connected with the microprocessor; the microprocessor of the student card judges whether students are in a going-in or going-out state according to the strong or weak changes of different recognition signals received by the radio-frequency receiving circuit, and sends the judged results to the server of the system through a GSM/GPRS wireless data channel. By adopting the system in the invention, students can go in or out in great numbers with no need of approaching the system to swipe the card, thereby causing no congestion or retention at the entrance or exit and generating accurate and reliable attendance information; the two transmitting antennae of the equipment at the entrance and exit can transmit signals at different time and with the same frequency, therefore, less frequency resources are occupied, the walking distance required during entrance or exist is short, and a student can be accurately recognized within 10m; and furthermore, the equipment in the invention is simple in structure and lower in cost.
Description
[technical field]
The present invention relates to RF discrepancy recognition technology, relate in particular to a kind of student's electronic attendance system.
[background technology]
Passive RFID gate control system or fingerprint access control need student's swiping the card or by fingerprint at one or more fixed equipments one by one, active RFID also needs student card and receiver that a nearer distance is arranged or the receiver of door case type is set, when if a large amount of students passes through, will cause crowded queuing, waste the unnecessary time.
Traditional student's electronic attendance system is installed in school's school gate with electronic attendance equipment, wherein, passive RFID gate control system or fingerprint access control need student's swiping the card or by fingerprint at one or more fixed equipments one by one, student's realization work attendance of swiping the card when the school gate, attendance data sends to operator, and operator ceases to notify child parents of student to arrive or instead of school by the note dispensing device to parents of student's sending short message by mobile phone again.Still there are larger defective in practice in this electronic attendance and SMS notification mode: at first, the student must swipe the card or successively by fingerprint, causes easily the school gate student to block up and is detained; Secondly, the initiative of whether swiping the card rests in student's hand, and the student may forget during through school gate and swipe the card, and returns again after also might having brushed card, has caused work attendance inaccurate.
The student card of student's electronic attendance active RFID system and receiver need to have a nearer distance or the receiver of door case type is set, the student is produced block up and be detained, and two data reading machines of active RFID system need spacing distance could correctly identify student card more than 30 meters.
Active RFID need to be placed on two receivers at a distance of about 30 meters two ends and could correctly identify, the data that a fairly large number of active RFID sends can't ensure and not collide, can only pass through some algorithms, as make at transmitting terminal mathematical model after once colliding for the second time or just can avoid for the third time colliding, not that very high (being generally less than 30% theoretical limit 50%) situation is carried out data and recovered at receiving end to colliding the data overlap rate, increased the complicacy of access control equipment and the harshness of cost and service condition.And this data are collided the defective that produces and can only be recovered repeatedly by the later stage technological means such as data validation and algorithm to the wireless data of data and reduce and come in and go out and the disappearance of work attendance information.
[summary of the invention]
The technical problem to be solved in the present invention provide a kind of simple in structure, can not cause the gateway personnel to block up or be detained, work attendance information is student's electronic attendance system accurately and reliably.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is that a kind of student's electronic attendance system comprises student card and gateway radio-frequency transmissions equipment, gateway radio-frequency transmissions equipment comprises two radio-frequency transmissions antennas, and the timesharing of two radio-frequency transmissions antennas is penetrated different identification signals with taking place frequently; Student card comprises radio-frequency (RF) receiving circuit, microprocessor and GSM/GPRS communication module, and radio-frequency (RF) receiving circuit and GSM/GPRS communication module connect respectively microprocessor; The microprocessor of student card is made the judgement that gets the hang of or do well outward according to the variation of the different identification signal powers that radio-frequency (RF) receiving circuit is received, and result of determination is sent to the server of system by the GSM/GPRS wireless data channel.
Above-described student's electronic attendance system, the horizontal range of two radio-frequency transmissions antenna spacings are 5-15 rice.
Above-described student's electronic attendance system, the first radio-frequency transmissions antenna transmission the first identification signal, the second radio-frequency transmissions antenna transmission the second identification signal; The direct of travel of first radio-frequency transmissions sky alignment the second radio-frequency transmissions antenna is approach axis, and the direct of travel of second radio-frequency transmissions sky alignment the first radio-frequency transmissions antenna is outer outgoing direction; When student card is received first the first identification signal, after receive the second identification signal, two identification signals grow in strength, and then by a little less than turning by force, when the second identification signal disappeared after the first identification signal disappeared, are judged to be to enter and finish; When student card is received first the second identification signal, after receive the first identification signal, two identification signals grow in strength, and then by a little less than turning by force, when the first identification signal disappeared after the second identification signal disappeared, are judged to be and go out to finish.
Above-described student's electronic attendance system, the radio-frequency (RF) receiving circuit of gateway radio-frequency transmissions equipment and student card is used the 915M ISM band.
Above-described student's electronic attendance system, gateway radio-frequency transmissions equipment adopt the bursty data pattern to send identification signal.
Above-described student's electronic attendance system, the microprocessor of student card according to result of determination by the GSM/GPRS wireless data channel by the short message that is reserved in phone number in the student card and sends to into the school or go out the school.
Above-described student's electronic attendance system, student card comprises the GPS module, the GPS module connects microprocessor; The GPS module is transferred to microprocessor with the positional information that receives, microprocessor with the positional information of student card by the GSM/GPRS wireless data channel by regularly sending to the server of system and/or the mobile phone of reserved number the interval time of setting.
Above-described student's electronic attendance system, student card is according to the inquiry student card place Chinese address short-message instruction that receives, should ask location address to send to system server, after server gets access to Chinese address, by GPRS Chinese address and reception short message mobile phone number are sent to student card, student card sends to corresponding phone number with " Chinese address " content with short message mode after receiving this GPRS instruction.
Above-described student's electronic attendance system, student card returns note interval time according to arranging of receiving, and upgrade this locality and upload interval time, and according to the most newly-installed reporting position information interval time of uploading.
Student's electronic attendance system support staff of the present invention comes in and goes out in batches, need not near swiping the card, and can not cause the gateway personnel to block up or is detained; Countless according to colliding possibility in theory, work attendance information accurately and reliably; Two emitting antenna timesharing same frequency emissions of gateway equipment, frequency resource takies little, and emissive power can be regulated 0dbm-20dbm, and what the identification of coming in and going out needed passes through apart from short, and 10M just can accurately identify with interior, and device structure is simple, and cost is lower.
[description of drawings]
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is embodiment of the invention student electronic attendance system block diagram.
Fig. 2 is student's electronic attendance system embodiment of the present invention gateway radio-frequency transmissions equipment block diagram.
Fig. 3 is that student's electronic attendance system embodiment of the present invention logic of coming in and going out is judged synoptic diagram.
[embodiment]
As depicted in figs. 1 and 2, student's electronic attendance system embodiment of the present invention comprises student card and gateway radio-frequency transmissions equipment.
The MCU of gateway radio-frequency transmissions equipment is by SPI mouth and four wireless modules of common I/O mouth control.1# wireless module and the timesharing of 3# wireless module are sent a-signal and B signal with taking place frequently, and outwards launch with frequency by two radio-frequency transmissions antennas timesharing of 1# and 3#.
The radio-frequency transmissions antenna of 1# and 3# wireless module is drawn the shell of equipment, is installed near the gateway, and be 5-15 rice along the horizontal range at channel direction interval, terrain clearance is the place of 1-2 rice, adjusts with border construction environment condition factually.
The emissive power that two buttons can be regulated transmitter module is divided into eight grades :+1db+2db+5db+8db+11db+14db+17db+20db, adjust according to the practice of construction environmental baseline.
2# and 4# wireless module are as reserving hardware backup and self check.As long as the radio-frequency transmissions antenna of 2# and 4# wireless module is drawn shell.Shell uses the outer cast aluminium shell of waterproof compartment.
Student card comprises radio-frequency (RF) receiving circuit, microprocessor, GPS module and GSM/GPRS communication module, and radio-frequency (RF) receiving circuit, GPS module and GSM/GPRS communication module connect respectively microprocessor.
Student card only uses RF to receive, and is not limited to a kind of RF receiving chip model, can follow the RF chip of changing flexibly different manufacturers according to the market cost,
The microprocessor of student card is made the judgement that gets the hang of or do well outward according to the variation of the different identification signal powers that radio-frequency (RF) receiving circuit is received, and result of determination is sent to the server of system by the GSM/GPRS wireless data channel.
As shown in Figure 3, the direct of travel of 1# radio-frequency transmissions sky alignment 3# radio-frequency transmissions antenna is approach axis, and the direct of travel of 3# radio-frequency transmissions sky alignment 1# radio-frequency transmissions antenna is outer outgoing direction
Enter decision logic: receive B signal → A after receiving first a-signal
RSSIB
RSSITwo signals strengthen → A gradually simultaneously
RSSI＜B
RSSISimultaneously two signals weaken → the a-signal then B blackout that disappears first gradually.
The decision logic of going out: receive a-signal → B after receiving first the B signal
RSSIA
RSSITwo signals strengthen → B gradually simultaneously
RSSI＜A
RSSISimultaneously two signals weaken gradually → then the B signal disappear first that a-signal disappears.
When student card is received first a-signal, after receive the B signal, two identification signals grow in strength, and then by a little less than turning by force, during the B blackout, are judged to be to enter and finish after a-signal disappears.
When student card is received first the B signal, after receive a-signal, two identification signals grow in strength, and then by a little less than turning by force, when a-signal disappears behind the B blackout, are judged to be and go out to finish.
Student card receives to identify and carries out matching identification after A, B signal data and the corresponding ISSI signal intensity thereof and go out process status, go out or enter a process when comparison report status information (enter, go out) finishing, so just produce work attendance information one time, in identifying, do not report, avoid just entering and go out again at once, or near the school doorway but do not enter to cause erroneous judgement disconnected.
The microprocessor of student card is according to result of determination, the work attendance information exchange crossed the GSM/GPRS wireless data channel send to system server on the internet, and school side can carry out personnel's attendance management by the main frame of internet.
The short message notification parents of student that the microprocessor of student card sends to into the school or goes out the school by the phone number that is reserved in the student card by the GSM/GPRS wireless data channel according to result of determination.
The GPS module is transferred to microprocessor with the positional information that receives, microprocessor is regularly sent to the server of system and/or the mobile phone of reserved number by the GSM/GPRS wireless data channel by the interval time of setting with the positional information of student card, is convenient to school side or the head of a family positions management to the student.Student card returns note interval time according to arranging of receiving, and upgrade this locality and upload interval time, and according to the most newly-installed reporting position information interval time of uploading
The radio-frequency (RF) receiving circuit of gateway radio-frequency transmissions equipment and student card is used the 915M ISM band, gateway radio-frequency transmissions equipment also belongs to the bursty data pattern on launch time, not real-time acquisition frequency resource, also avoid the interference of GSM and other application, launching when gateway radio-frequency transmissions equipment uses with frequency division, is not real-time acquisition frequency resource on whole launch time.Student card receives identification signal, has avoided the data collision, and two emitting antennas can effectively be identified at a distance of 5-10 rice, and two receiving equipments usually will be about 30 meters in traditional active RFID.
Student card is according to the inquiry student card place Chinese address short-message instruction that receives, the GPS address date of student card position is sent to system server, after server parses GPS address date gets access to Chinese address, by the GSM/GPRS wireless data channel Chinese address of correspondence is sent to student card, after student card receives the instruction of server, the content of Chinese address is sent to the mobile phone that sends short-message instruction with short message mode.
The above embodiment of student's electronic attendance system of the present invention has following advantage:
1. the support staff comes in and goes out in batches, need not near swiping the card, and can not cause the gateway personnel to block up or is detained; Countless according to colliding possibility in theory, carry out accurately and effectively the direction identification of personnel's access door behavior, work attendance information is accurately and reliably;
2. two of gateway equipment emitting antenna timesharing same frequency emissions, frequency resource takies little, emissive power can be regulated 0dbm-20dbm, what the identification of coming in and going out needed passes through apart from short, 10M just can accurately identify with interior, simplified doorway equipment and installed, only needed to connect power supply and settle two emitting antennas separated by a distance, without special technique demands such as doorframes.
3. obtain positional information by GPS and GSM base station information and by means of communication such as GPRS the information such as locating information, work attendance are sent to Internet Server, the user can carry out personal management by the internet computer.
Claims (9)
1. student's electronic attendance system is characterized in that, comprises student card and gateway radio-frequency transmissions equipment, and gateway radio-frequency transmissions equipment comprises two radio-frequency transmissions antennas, and the timesharing of two radio-frequency transmissions antennas is penetrated different identification signals with taking place frequently; Student card comprises radio-frequency (RF) receiving circuit, microprocessor and GSM/GPRS communication module, and radio-frequency (RF) receiving circuit and GSM/GPRS communication module connect respectively microprocessor; The microprocessor of student card is made the judgement that gets the hang of or do well outward according to the variation of the different identification signal powers that radio-frequency (RF) receiving circuit is received, and result of determination is sent to the server of system by the GSM/GPRS wireless data channel.
2. student's electronic attendance system according to claim 1 is characterized in that, the horizontal range of two radio-frequency transmissions antenna spacings is 5-15 rice.
3. student's electronic attendance system according to claim 1 is characterized in that, the first radio-frequency transmissions antenna transmission the first identification signal, the second radio-frequency transmissions antenna transmission the second identification signal; The direct of travel of first radio-frequency transmissions sky alignment the second radio-frequency transmissions antenna is approach axis, and the direct of travel of second radio-frequency transmissions sky alignment the first radio-frequency transmissions antenna is outer outgoing direction; When student card is received first the first identification signal, after receive the second identification signal, two identification signals grow in strength, and then by a little less than turning by force, when the second identification signal disappeared after the first identification signal disappeared, are judged to be to enter and finish; When student card is received first the second identification signal, after receive the first identification signal, two identification signals grow in strength, and then by a little less than turning by force, when the first identification signal disappeared after the second identification signal disappeared, are judged to be and go out to finish.
4. student's electronic attendance system according to claim 1 is characterized in that, the radio-frequency (RF) receiving circuit of gateway radio-frequency transmissions equipment and student card is used the 915M ISM band.
5. student's electronic attendance system according to claim 1 is characterized in that, gateway radio-frequency transmissions equipment adopts the bursty data pattern to send identification signal.
6. student's electronic attendance system according to claim 1 is characterized in that, the microprocessor of student card according to result of determination by the GSM/GPRS wireless data channel by the short message that is reserved in phone number in the student card and sends to into the school or go out the school.
7. student's electronic attendance system according to claim 1 is characterized in that, student card comprises the GPS module, and the GPS module connects microprocessor; The GPS module is transferred to microprocessor with the positional information that receives, microprocessor with the positional information of student card by the GSM/GPRS wireless data channel by regularly sending to the server of system and/or the mobile phone of reserved number the interval time of setting.
8. student's electronic attendance system according to claim 7, it is characterized in that, student card is according to the inquiry student card place Chinese address short-message instruction that receives, the GPS address date of student card position is sent to system server, after server parses GPS address date gets access to Chinese address, by the GSM/GPRS wireless data channel Chinese address of correspondence is sent to student card, after student card receives the instruction of server, the content of Chinese address is sent to the mobile phone that sends short-message instruction with short message mode.
9. student's electronic attendance system according to claim 7 is characterized in that, student card returns note interval time according to arranging of receiving, upgrade this locality and upload interval time, and according to the most newly-installed reporting position information interval time of uploading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210480828.2A CN102982586B (en) | 2012-11-23 | 2012-11-23 | A kind of student's electronic attendance system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480828.2A CN102982586B (en) | 2012-11-23 | 2012-11-23 | A kind of student's electronic attendance system |
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| CN102982586A true CN102982586A (en) | 2013-03-20 |
| CN102982586B CN102982586B (en) | 2015-09-16 |
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| CN201210480828.2A Expired - Fee Related CN102982586B (en) | 2012-11-23 | 2012-11-23 | A kind of student's electronic attendance system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104537722A (en) * | 2015-01-26 | 2015-04-22 | 深圳市天星通科技有限公司 | Method and equipment capable of simultaneously checking attendance of multiple persons |
| CN106023327A (en) * | 2016-05-06 | 2016-10-12 | 成都新橙北斗智联有限公司 | Single reporting enter and exit card punching system and method based on wireless technology |
| CN106204773A (en) * | 2015-05-04 | 2016-12-07 | 中兴通讯股份有限公司 | A kind of method realizing work attendance and work attendance service end |
| CN107038764A (en) * | 2016-07-21 | 2017-08-11 | 上海先斯智能技术有限公司 | A kind of attendance checking system based on RFID |
| CN107358671A (en) * | 2017-07-18 | 2017-11-17 | 湖南光海教育科技有限公司 | intelligent campus management system |
| US9852556B2 (en) | 2016-04-15 | 2017-12-26 | Cal-Comp Electronics & Communications Company Limited | Dynamic entrance controlling system and dynamic entrance controlling method |
| CN107610265A (en) * | 2017-09-08 | 2018-01-19 | 天绘北斗信息技术江苏有限公司 | A kind of RFID work attendances are anti-to fail to report method of radiating |
| CN108961446A (en) * | 2017-05-22 | 2018-12-07 | 湖南光海教育科技有限公司 | Intelligent campus monitoring method, device and computer readable storage medium |
| CN109104484A (en) * | 2018-08-13 | 2018-12-28 | 四川科道芯国智能技术股份有限公司 | Student's method for managing and monitoring and device |
| CN113298970A (en) * | 2021-05-24 | 2021-08-24 | 罗华龙 | Human resource management system and method |
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| CN104537722A (en) * | 2015-01-26 | 2015-04-22 | 深圳市天星通科技有限公司 | Method and equipment capable of simultaneously checking attendance of multiple persons |
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| CN107038764A (en) * | 2016-07-21 | 2017-08-11 | 上海先斯智能技术有限公司 | A kind of attendance checking system based on RFID |
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| CN107358671A (en) * | 2017-07-18 | 2017-11-17 | 湖南光海教育科技有限公司 | intelligent campus management system |
| CN107610265A (en) * | 2017-09-08 | 2018-01-19 | 天绘北斗信息技术江苏有限公司 | A kind of RFID work attendances are anti-to fail to report method of radiating |
| CN109104484A (en) * | 2018-08-13 | 2018-12-28 | 四川科道芯国智能技术股份有限公司 | Student's method for managing and monitoring and device |
| CN113298970A (en) * | 2021-05-24 | 2021-08-24 | 罗华龙 | Human resource management system and method |
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| CN102982586B (en) | 2015-09-16 |
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