CN205354129U

CN205354129U - Radio frequency identification attendance system

Info

Publication number: CN205354129U
Application number: CN201521067736.7U
Authority: CN
Inventors: 杨波; 蒋雪琴
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-12
Filing date: 2015-12-12
Publication date: 2016-06-29
Anticipated expiration: 2025-12-12

Abstract

The utility model relates to a radio frequency identification attendance system, the package power module of this system, RFID card, at least one reading and writing equipment, control terminal, display module, message sending module, attendance information database and keyboard module. Reading and writing equipment includes radio frequency module, processor unit, serial communication module and wireless communication module, and processor unit links to each other with radio frequency module, serial communication module and wireless communication module respectively, receives the data that come from radio frequency module, and the data after the processing are passed through the serial communication module with wireless communication module sends. This system has changed traditional manual work mode of calling the roll, and the great has saved the artifical time of calling the roll and expending, is favorable to promoting the informationization of teaching management, universities and colleges of professorship information construction with higher speed.

Description

A kind of RF identification attendance checking system

Technical field

This utility model relates to technical field of RFID, particularly relates to a kind of RF identification attendance checking system.

Background technology

RF identification is (English: RadioFrequencyIDentification, abbreviation: RFID) be a kind of wireless communication technology, radio signals identification specific objective can be passed through and read and write related data, without setting up machinery or optical contact between the system of identification and specific objective.Wireless information is the electromagnetic field by furnishing radio frequency, and data are sent out from being attached on the label article, with automatic identification with follow the trail of these article.Some label can be obtained by energy when identifying from the electromagnetic field that evaluator sends, and is not required to battery；Also label itself is had to have power supply, it is possible to actively to send radio wave (electromagnetic field of furnishing radio frequency).Label contains the information of Electronic saving, can identify within several meters.With bar code the difference is that, radio-frequency (RF) tag need not be within evaluator sight line, it is also possible to embeds within tracked object.

Attendance management increasingly receives the concern of each school, it is necessary to the system of attendances such as strict student attends class, review one's lessons, and is also an important process and the groundwork target of Vocational College Management personnel simultaneously.The experimental courses of School of High Profession Technology, generally concentrated instruction by teacher, then student resource exercise, or practised by student resource, and teacher plays the effect of guided teaching, student is by experiment, knowledge can be grasped more intuitively, temper professional operation skill, promote the manipulative ability of specialty, very important effect is played in the raising of comprehensive quality of students

The attendance management situation of most School of High Profession Technology mainly has situations below at present: attendance data statistic is bigger, it is necessary to accounts for teacher and accreditation teacher's extensive work time, have impact on other teaching operations of teacher；Cause the result come out not prompt enough, it is easy to omitting attendance record data, education and self education to student can not carry out in time, to such an extent as to the phenomenon level that cannot punish student occurs；Cause management personnel, teacher, student cannot understand work attendance situation in time, form the monitoring lost efficacy；So, numerous teachers very easily lose the enthusiasm to attendance management.Most schools in attendance management still in the state of manual work, it is difficult to adapt to the requirement to student attendance management under the development of current new situations.

Therefore, strengthen schools attendance recording, except need management system by strict implement except, in addition it is also necessary to having the cooperation of technological means, prior art adopts RFID to swipe the card work attendance, but swipe the card work attendance due to its decipherment distance short, the reading time is short, it is easy to causes and leakage swipes the card, or walks around the situations such as the POS, in this case, RFID technique work attendance how is more effectively utilized to be necessary.

Utility model content

The technical problems to be solved in the utility model is in that, swipes the card that decipherment distance is short, the reading time is short for the RFID of schools attendance recording in prior art, easily causes and leakage swipe the card or walk around the defects such as the POS, it is provided that a kind of RF identification attendance checking system.This system can be automatically performed work attendance in real time, and can grasp the situation that checked-in person person is currently located in real time, solves the problem arrived for people's allograph.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of RF identification attendance checking system, this system bag power module, rfid card sheet, at least one read-write equipment, control terminal, display module, SMS transmission module, work attendance information database and Keysheet module, it is characterised in that:

Read-write equipment includes radio-frequency module, processor unit, serial communication modular and wireless communication module, processor unit is connected with radio-frequency module, serial communication modular and wireless communication module respectively, receiving the data from radio-frequency module, the data after process are sent by described serial communication modular and described wireless communication module；

Wherein, described radio-frequency module adopts FM1702SL radio frequency chip, and processor unit adopts ATmega8AVR single-chip microcomputer, and serial communication modular adopts USB-UART conversion chip PL2303, and wireless communication module adopts monolithic radio frequency transceiving chip NRF24L01；

Control terminal to be connected with described read-write equipment, described display module, described SMS transmission module, described work attendance information database and described Keysheet module respectively, this control terminal receives the data from described read-write equipment, it is sent to display module to be shown to user, send described work attendance information database to so that user inquires about, and by SMS transmission module, work attendance information is sent to the mobile terminal specified；

Wherein said SMS transmission module adopts double frequency gsm module TC35i, and described Keysheet module adopts key control chip ZLG7290, and described display module adopts LCM320240ZK graphic lcd.

Preferably, described control terminal adopts ARM embedded processing chip LPC2210.

Preferably, described power module adopts linear voltage stabilization chip LM7805 and ASM1117-3.3.

This utility model is automatically obtained the real time position to checked-in person person by RFID technique and RFID indoor positioning technologies and positions, automatically the personnel's situation in current work attendance region can not only be grasped in real time, and the situation that in work attendance region, personnel are current can also be grasped, this utility model has the advantage of following several respects:

1) change traditional artificial roll-call pattern, greatly save artificial roll-call the spent time, it is possible to prevent the generation of allograph behavior, it is possible to grasp behavior absent from duty in real time；

2) may advantageously facilitate the informationization of teaching management, accelerate School of High Profession Technology's informatization；Be conducive to strengthening student learning consciousness, improve students ' learning performance；Compensate for traditional student attendance way to manage, by information network, it is achieved the real-time of student attendance management.

3) help manager to understand student in time dynamic, reduce management difficulty；Being conducive to collection and arrangement, the analysis of teaching data, for student learning recruitment evaluation, faculty improves teaching method, method provides important evidence；By means of the construction of Work attendance management system, also the raising of school administrator's professional qualities at different levels, teaching management level and efficiency will be promoted.

Accompanying drawing explanation

Accompanying drawing is used for providing being further appreciated by of the present utility model, and constitutes a part for description, is used for explaining this utility model, is not intended that restriction of the present utility model together with embodiment of the present utility model.In the accompanying drawings:

Fig. 1 is system structure schematic diagram of the present utility model；

Fig. 2 is the schematic diagram of processor unit peripheral circuit；

Fig. 3 is the circuit diagram of radio-frequency module；

Fig. 4 is the circuit diagram of power module；

Fig. 5 is the circuit diagram of wireless communication module；

Fig. 6 is the circuit diagram of SMS transmission module；

Fig. 7 is the circuit diagram of Keysheet module；

Fig. 8 is network topology structure schematic diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of attendance checking system.This system bag power module (not shown), rfid card sheet, at least one read-write equipment, control terminal, display module, SMS transmission module, work attendance information database and Keysheet module.Read-write equipment includes radio-frequency module, processor unit, serial communication modular and wireless communication module, processor unit is connected with radio-frequency module, serial communication modular and wireless communication module respectively, rfid card sheet read-write equipment primary responsibility receives, resolves the packet that transmission comes, and control the work without lineman's serial communication module, and obtain the information of rfid card sheet in real time and feed back to control terminal.

System needs to use+5V and+3.3V power supply, wherein+5V in radio-frequency module amplifier, drive circuit and USB-UART serial communication module power ,+3.3V powers to wireless communication module NRF24L01.Although generally speaking system power consumption is less, but in order to reduce interference, improve system stability, require the good stability of power supply, therefore input 12V DC source, being system power supply after with conventional linear voltage stabilization chip LM7805 and ASM1117-3.3 lowering and stabilizing blood pressure, the circuit diagram of power module is as shown in Figure 4.

Read-write equipment includes radio-frequency module, processor unit, serial communication modular and wireless communication module, processor unit is connected with radio-frequency module, serial communication modular and wireless communication module respectively, receiving the data from radio-frequency module, the data after process are sent by described serial communication modular and described wireless communication module.Wherein, radio-frequency module adopts FM1702SL radio frequency chip, and processor unit adopts ATmega8AVR single-chip microcomputer, and serial communication modular adopts USB-UART conversion chip PL2303, and wireless communication module adopts monolithic radio frequency transceiving chip NRF24L01.

Because read-write equipment needs the control used fairly simple: relate only to wireless/serial communication, EEPROM data read-write operation, rfid card sheet read-write operation.Therefore need not select the microcontroller of significantly high level, use a piece of ATmega8 to be just fully able to competent.ATmega8 is based on 8 CMOS microcontrollers of low-power consumption of the AVRRISC structure of enhancing.Due to instruction set and single clock cycle time for each instruction of its advanced person, the data throughput of ATmega8 is up to 1MIPS/MHz, such that it is able to the contradiction that mitigation systems is between power consumption and processing speed.Processor unit peripheral circuit include power on/button reset, system mode instruction, ISP programming, DART/SPI communication interface, the schematic diagram of processor unit peripheral circuit is as shown in Figure 2.

The circuit diagram of serial communication modular has been also contained in Fig. 2.System is completed processor unit and the communication controlled between terminal by FI232RL circuit.This circuit adopts FT232RL chip, it is achieved the conversion between Transistor-Transistor Logic level and USB interface.FI232RL circuit have remove that peripheral crystal oscillator, circuit be simple from, the feature such as TX, RX transmitting-receiving instruction and working stability.

System indicator one has two, one green of a redness.Under general case, green light lights expression system normal operation, and red light is for indicating the mode of operation of RFID read-write equipment.When RFID detects effective card, green light will glimmer 3 times, last about 1S, and with buzzer call, the buzzing time can by program setting, and when invalid card being detected, buzzer does not pipe, and red light continues to light about 1S.

Fig. 3 is the circuit diagram of radio-frequency module, and system adopts FM1702SL as the card reader chip of RF identification part.FM1702SL is based on the non-contact card card reader special chip of IS014443 standard.Supporting the typeA contactless communications protocol under 13.56MHz frequency and multiple encryption algorithms, read-write operation distance is up to 10cm.In campus widely used " all-purpose card ', be the IC-card of MIFARES50 type, be the radio electronic label being operated under 13.56MHz frequency.When FM1702SL card reader sends frequency electromagnetic waves to such IC-card, generation is resonated by the LC series resonant circuit within card, and electric capacity will build up on electric charge.When stored charge is more than 2V, running voltage can be provided for card circuit, it is achieved being wirelessly transferred between data and the card reader in card.Transmitter part within FM1702SL need not increase active circuit just can directly drive the in-plant antenna of operation, and receptor part provides a reliable and effective demodulation and decoding circuitry, for the transponder signal that IS014443A is compatible.Provide great motility so to the design of read-write equipment.Because chip internal has highly integrated analog circuit, so only needing a small amount of peripheral circuit to achieve that read-write capability.

Fig. 5 is the circuit diagram of wireless communication module.NRF24L01 is a new single chip radio-frequency receiving-transmitting device that Nordic company produces, and works in 2.4GHz-2.5GHzISM frequency range.The functional modules such as built-in frequency synthesizer, power amplifier, crystal oscillator, manipulator, and merged enhancement mode ShockBurst technology, wherein output and communication channel can be configured by program.NRF24L01 is low in energy consumption, and when with the power emission of-6dBm, operating current also only has 9mA；During reception, operating current only has 12.3mA, and multiple low-power working mode (power-down mode and idle pulley) makes energy-saving design more convenient.

SMS transmission module adopts the double frequency gsm module TC35i of Siemens Company, and the circuit diagram of SMS transmission module is as shown in Figure 6.Short message sending platform is incorporated into student's safety work attendance system of registering can utilize this general form of note to send the multidate information in the school that comes in and goes out in time to parents of student, facilitate the discrepancy school time of head of a family's students ', can being effectively prevented from some contingencies, the communicating number of short message receiving terminal is stored in work attendance information database.The short message port that sending short messages in groups platform is based on China Mobile, UNICOM, telecommunications directly provide is connected with the Internet and realizes carrying out note Batch sending and self-defined transmission with client's assigned number.Require SMS platform can move to the whole nation, UNICOM and Personal Handyphone System user send timely information；Disclosure satisfy that information group sending function, and can arrive moment；Without by internet platform and SMS platform, not by the threat of network security, there is independence completely.Thus sending short messages in groups platform has the features such as fast, accurate, flexible, the low cost of transmission speed.

Keyboard is as the input equipment of the most frequently used man-machine interaction, and keyboard can be used to realize the function such as Row control and information input.Keyboard can be divided into coding type keyboard and non-coding formula keyboard two class by its version.Coding type keyboard is to be automatically generated by the coding of button by its internal hardware logic circuit.This keyboard is easy to use, but expensive.Non-coding formula keyboard is mainly produced by the coding of button by software.Its simple in construction, low price, but the establishment of Keyboard management program is also more complicated.

Relatively two kinds of methods, native system have employed the latter, but have employed special key control chip ZLG7290, so both simplifies design and reduces cost, improves again the reliability of system, and the schematic diagram of keyboard circuit is as shown in Figure 7.ZLG7290 have employed I²C serial line interface, it is provided that special keyboard interrupt signal, can sample 64 buttons or sensor, can detect the double hit number of times of each button.Its basic function is as follows: keyboard de-jitter is when key is pressed and decontrols, it is possible to there will be level state and repeatedly changes, and is called keyboard shake.Keypad order mistake can be caused, so to carry out de-jitter if not dealing with.

For client user, namely campus user (department leader, student, tutor, manager etc.) can log in native system by campus network, information inquiry and other application operations is carried out according to corresponding authority, such as: work attendance information inquiry, application of asking for leave, examination & approval of asking for leave, natural law inquiry etc. of asking for leave.In order to more convenient unlimited time inquiry, it is also possible to directly logged in native system by Internet and conduct interviews.Then, considering the management mode that School of High Profession Technology is existing, further according to functional requirement and the application architecture demand of this system, the parallel connection that combines with current development technique is tied to the practical situation of campus network, by analyzing, obtain the network operation fabric topology figure of attendance checking system as shown in Figure 8.

Non-contact type that RFID radio-frequency technique has reads and the advantage such as remote reading, enable the system to better obtain student in school (in recognizer read range) active situation, and pass through SMS platform, real-time contacts with Student monitoring people, allow the head of a family also be able to understand more accurately time of turnover school of child, greatly reduce student because go to school not in time to school, classes are over, and the situation such as go home not in time causes the probability of peril.

Protection domain of the present utility model is not limited to the above embodiments, it is clear that this utility model can be carried out various change and deformation without deviating from scope and spirit of the present utility model by those skilled in the art.If these are changed and deform in the scope belonging to this utility model claim and equivalent technologies thereof, then intention of the present utility model also comprises these changes and deformation.

Claims

1. a RF identification attendance checking system, this system bag power module, rfid card sheet, at least one read-write equipment, control terminal, display module, SMS transmission module, work attendance information database and Keysheet module, it is characterised in that:

2. RF identification attendance checking system as claimed in claim 1, it is characterised in that: described control terminal adopts ARM embedded processing chip LPC2210.

3. RF identification attendance checking system as claimed in claim 1 or 2, it is characterised in that: described power module adopts linear voltage stabilization chip LM7805 and ASM1117-3.3.