CN202904680U - Student electronic attendance system - Google Patents
Student electronic attendance system Download PDFInfo
- Publication number
- CN202904680U CN202904680U CN 201220627471 CN201220627471U CN202904680U CN 202904680 U CN202904680 U CN 202904680U CN 201220627471 CN201220627471 CN 201220627471 CN 201220627471 U CN201220627471 U CN 201220627471U CN 202904680 U CN202904680 U CN 202904680U
- Authority
- CN
- China
- Prior art keywords
- student
- radio
- frequency
- receiving circuit
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The utility model discloses a student electronic attendance system, which comprises a student card, and entrance and exit radio frequency transmitting equipment, wherein the entrance and exit radio frequency transmitting equipment comprises two radio frequency transmitting antennas which are used for respectively transmitting different identification signals in a time-sharing and same-frequency way, the student card comprises a radio frequency receiving circuit, a microprocessor and a GSM/GPRS (global system for mobile communications/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 student electronic attendance system has the advantages that the microprocessor of the student card judges whether the state is the entering state or the exiting state according to the intensity change of the different identification signals received by the radio frequency receiving circuit, and the judging result is sent to a server of the system by a GSM/GPRS wireless data channel; the batched entering and exiting of people is supported, the card punching near the system is not required, the blockage or detention of the people at the entrance and exit is avoided, and the attendance information is accurate and reliable; the two transmitting antennas of the entrance and exit equipment transmit in the time-sharing and same-frequency way, the occupation of frequency source is little, the required passing distance during the entering and exiting identification is short, and the accurate identification is realized in the range of 10M; and the equipment structure is simple, and the cost is lower.
Description
[technical field]
The utility model relates to RF discrepancy recognition technology, relates 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, easily causes 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 approximately 30 meters correctly identification of two ends, 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 problems to be solved in the utility model 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 adopted in the utility model is, a kind of student's electronic attendance system, comprise student card and gateway radio-frequency transmissions equipment, gateway radio-frequency transmissions equipment comprises that timesharing penetrates two radio-frequency transmissions antennas of 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.
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, gateway radio-frequency transmissions equipment are that the radio-frequency (RF) receiving circuit of 915M ISM band radio-frequency transmissions equipment, student card is 915M ISM band radio-frequency (RF) receiving circuit.
Above-described student's electronic attendance system, gateway radio-frequency transmissions equipment are the radio-frequency transmissions equipment that the bursty data pattern sends identification signal.
Above-described student's electronic attendance system, student card comprises the GPS module, the GPS module connects microprocessor.
The utility model student electronic attendance system the support staff come in and go out in batches, need not near swiping the card, and can not cause the gateway personnel to block up or be 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]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the utility model embodiment student electronic attendance system block diagram.
Fig. 2 is the utility model student electronic attendance system embodiment gateway radio-frequency transmissions equipment block diagram.
Fig. 3 is that the utility model student electronic attendance system embodiment logic of coming in and going out is judged schematic diagram.
[embodiment]
As depicted in figs. 1 and 2, the utility model student electronic attendance system embodiment 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 the utility model student electronic attendance system 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 (5)
1. student's electronic attendance system, it is characterized in that, comprise student card and gateway radio-frequency transmissions equipment, gateway radio-frequency transmissions equipment comprises that timesharing penetrates two radio-frequency transmissions antennas of 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.
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, gateway radio-frequency transmissions equipment is that the radio-frequency (RF) receiving circuit of 915M ISM band radio-frequency transmissions equipment, student card is 915M ISM band radio-frequency (RF) receiving circuit.
4. student's electronic attendance system according to claim 1 is characterized in that, gateway radio-frequency transmissions equipment is the radio-frequency transmissions equipment that the bursty data pattern sends identification signal.
5. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627471 CN202904680U (en) | 2012-11-23 | 2012-11-23 | Student electronic attendance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220627471 CN202904680U (en) | 2012-11-23 | 2012-11-23 | Student electronic attendance system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202904680U true CN202904680U (en) | 2013-04-24 |
Family
ID=48125320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220627471 Expired - Fee Related CN202904680U (en) | 2012-11-23 | 2012-11-23 | Student electronic attendance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202904680U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982586A (en) * | 2012-11-23 | 2013-03-20 | 深圳市中科南方科技发展有限公司 | Electronic attendance system used by students |
| CN107403477A (en) * | 2017-08-11 | 2017-11-28 | 北京启迪时代科技有限公司 | The method that discrepancy judgement is carried out using wireless signal Time-distribution |
| CN113256831A (en) * | 2021-05-10 | 2021-08-13 | 杭州魔点科技有限公司 | Bluetooth non-inductive attendance checking method, asset safety management method and system |
-
2012
- 2012-11-23 CN CN 201220627471 patent/CN202904680U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982586A (en) * | 2012-11-23 | 2013-03-20 | 深圳市中科南方科技发展有限公司 | Electronic attendance system used by students |
| CN102982586B (en) * | 2012-11-23 | 2015-09-16 | 深圳市中科南方科技发展有限公司 | A kind of student's electronic attendance system |
| CN107403477A (en) * | 2017-08-11 | 2017-11-28 | 北京启迪时代科技有限公司 | The method that discrepancy judgement is carried out using wireless signal Time-distribution |
| CN113256831A (en) * | 2021-05-10 | 2021-08-13 | 杭州魔点科技有限公司 | Bluetooth non-inductive attendance checking method, asset safety management method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102982586B (en) | A kind of student's electronic attendance system | |
| EP3703431B1 (en) | Multi-interface transponder device | |
| CN206921126U (en) | A kind of Internet of Things electronic tag with positioning function | |
| CN100459731C (en) | Method and apparatus for channel sharing between multiple communication systems | |
| CN201054714Y (en) | A road side base station for multi-meaning path recognition | |
| CN111586838B (en) | Underground accurate positioning method for coal mine | |
| CN101473672A (en) | Multiradio scheduling including clock synchronization validity protection | |
| CN102883431A (en) | Intelligent positioning system and intelligent positioning method on basis of CSS (computer system simulation) technology | |
| CN103442362A (en) | Communication device and method for interference coordination and energy conservation with same adopted | |
| CN104299279A (en) | Radiofrequency technology-based special electronic attendance checking system for students | |
| TW200714112A (en) | Wireless access control apparatus, mobile station and method | |
| CN202904680U (en) | Student electronic attendance system | |
| CN202221597U (en) | Garage access control system with short message service trigger and position matching guarantee functions | |
| US7840240B2 (en) | Wireless network node | |
| CN107038764A (en) | A kind of attendance checking system based on RFID | |
| CN201845443U (en) | Bus in-place detection system based on Zigbee technology | |
| CN102957473A (en) | Circulation monitoring data management relay of urban network cable | |
| CN203733314U (en) | Bus stop equipment confirming and sending bus arrival information to mobile phone based on Bluetooth | |
| CN104914449A (en) | Person one-way in/out identifying and positioning system based on 2.4G wireless communication | |
| CN105488545A (en) | RFID (Radio Frequency Identification)-based school-age children security system | |
| CN204925392U (en) | One -way business turn over of personnel discernment positioner based on 2. 4G radio communication | |
| CN204463235U (en) | Based on the vehicle-mounted path recognition device of frequency hopping | |
| CN102722930A (en) | Key-free vehicle entry system and automobile | |
| CN205091766U (en) | School -ager safety coefficient based on RFID | |
| CN206876879U (en) | A kind of Big Dipper and Digital Clustering converged communication system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20201123 |