CN202153360U - Portable 134.2 KHz RFID multi-interface reader-writer - Google Patents
Portable 134.2 KHz RFID multi-interface reader-writer Download PDFInfo
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- CN202153360U CN202153360U CN2010206316927U CN201020631692U CN202153360U CN 202153360 U CN202153360 U CN 202153360U CN 2010206316927 U CN2010206316927 U CN 2010206316927U CN 201020631692 U CN201020631692 U CN 201020631692U CN 202153360 U CN202153360 U CN 202153360U
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Abstract
The utility model relates to a portable 134.2 KHz RFID multi-interface reader-writer, comprising a power supply circuit; an antenna emitting a radiofrequency signal with a specific frequency and enabling targets with electric tags to generate induction current when entering into the working area of an emission antenna and a reading and writing circuit realizing data modulation, data demodulation and signal receiving and transmitting; a control circuit identifying tag identity and performing processing and control thereon according to logical operation of the demodulated and decoded data, and emitting instructions to control a reader-writer to complete different reading and writing operation; an interface circuit outputting tag data; a storage circuit storing tag data; a display circuit for displaying the reading and writing result on a liquid crystal screen; and an indication circuit for displaying the operation state of the reader-writer. The portable 134.2 KHz RFID multi-interface reader-writer is fast in reading and writing speed, can perform operation on EEPROM of a tag, is long in reading and writing distance, can realize non-contact type reading and writing operation, storage, output and display of a passive low frequency glass tube implanted tag, is strong in interference resistance, and has good secrecy and safety performance.
Description
(1) technical field
The utility model relates to the radio RF recognition technology field, specially refers to a kind of portable many interfaces of 134.2K hertz RFID read write line.
(2) background technology
RFID is a kind of contactless automatic identification and data acquisition technology, and it is through the automatic recognition objective object of radiofrequency signal and obtain related data, and identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be discerned high-speed moving object and can discern a plurality of labels simultaneously, and is swift and convenient to operate.Radio-frequency recognition system is generally formed complete system by electronic tag, read-write facility, application software three.Electronic tag includes a silicon and an antenna, the data message of storage target in the chip.During system works; Read write line sends electronic pulse signal to FX; When electronic tag gets into this zone, be activated and send the data message (passive electronic label) that is stored in the label to rfid interrogator; Perhaps initiatively send the signal (being active electronic label) of a certain frequency, rfid interrogator through decoding processing, sends to information the computer application software of rear end through bluetooth or USB interface after receiving from the data message of label; Thereby realize the contactless of electronic tag read, reach the purpose that automatic recognition object obtains data.Reading while write device also can be under the control of application software makes amendment to the information of electronic tag and writes.Frequency according to work is different, and REID is divided into low frequency (LF), high frequency (HF), ultrahigh frequency (UHF), microwave frequency band.Wherein the main advantage of low-frequency technology is embodied in: frequency of operation is not retrained by radio frequency control; Can through-fall, organic organization, timber etc.; (for example: animal identification etc.) be fit to very much the recognition application in-plant, low velocity, that the data volume requirement is less.
Present portable low frequency read write line design mainly is made up of control circuit, interface circuit, RF receiving and transmission module.Hypotelorism (being lower than 2 centimetres) occurs reading through regular meeting in the open air or during outdoor utility, do not have wireless or the Bluetooth transmission interface, problems such as no display message and storage capacity bring very big obstacle for actual the use.
(3) summary of the invention
The utility model is exactly will provide a kind of and can portablely use, guarantee the 134.2K hertz rfid interrogator that reads distance, storage appropriate data information, bluetooth and USB several data interface are arranged, and is used as all kinds of computer application systems based on the low-frequency electronic label.
The utility model is a kind of portable many interfaces of 134.2K hertz RFID read write line, it is characterized in that: the power circuit that comprises the WV that whole read write line is provided; The radiofrequency signal of 134.2K hertz CF be can send, faradic antenna and the read/write circuit of realizing data-modulated, demodulation and receiving and transmitting signal produced when making the target of adhering to electronic tag get into the perform region of emitting antenna; Can make corresponding processing and control to the valid data behind the demodulation sign indicating number according to the identity of this label of logical operation identification, and send the control circuit that the instruction control read write line is accomplished different read-write operations; Can be the interface circuit of the related data of electronic tag output; The memory circuit of the related data of ability store electrons label; The indicating circuit of display circuit that also comprises the result that can on the LCD liquid crystal display, present read-write and the running status that is used to show said many interfaces read write line.
The technical scheme that the utility model adopts is that portable many interfaces of 134.2K hertz RFID read write line hardware mainly is made up of seven parts: power circuit, read/write circuit and antenna, control circuit, interface circuit, memory circuit, display circuit and indicating circuit.
Power circuit adopts the TPS60110 chip, and power distribution supply well guarantees that the WV of whole read write line can keep corresponding normal working voltage; Can charge to lithium battery through usb circuit again simultaneously.
Read/write circuit is used to realize data-modulated, demodulation and receiving and transmitting signal, and native system adopts RFID private radio base station ic EM4095 as the interface between electronic tag and the recognition terminal.Reading and writing device antenna produces directed radiofrequency signal.Electronic tag adopts the passive read-write label of EM4305 of EM company, can through read write line relevant information be write label according to customer requirements during use.When label gets in the antenna radio frequency operation scope of read write line; Label is activated; Read write line sends reading data signal and gives label; Label passes through antenna transmission to read write line, on one side read write line deposits memory circuit in through modulation after receiving information, Yi Bian the data after will handling are sent computer application system back to through interface circuit according to the reading data signal that receives with data designated in the storage unit; If need to revise the data of label, can send write data signal by read write line and give label, label is revised internal storage data after receiving data automatically.
The STC89C58 single-chip microcomputer that control circuit adopts Shenzhen macrocrystalline company to produce, implementation procedure control, data processing and accomplish and the data communication of computer application system or the data transmission of I/O equipment through interface circuit.
Interface circuit comprises usb circuit and Bluetooth circuit.Usb circuit guarantees communicating by letter of computer application system or I/O equipment and control circuit, to control circuit transmitting control commands or reception data and the operationral report from control circuit.The design of novel Bluetooth circuit and control are very succinct, can connect as serial ports after the successful matching and operate, and being connected of very convenient read write line and smart machine also can solve the problem of carrying out complex query and data analysis in the open air.
The two-wire system serial electrically-erasable ROM (read-only memory) AT24C256 that memory circuit adopts atmel corp to produce, it has the self-timing writing cyclophysis, and capacity 256Kbit is particularly suitable for having the application scenario of strict demand to use to power consumption.
Display circuit is the LCD liquid crystal display, mainly can show the application result of the utility model effectively.
Indicating circuit is a LED light, mainly can show the running status of the utility model effectively.
Further, described power circuit can with the 220V civil power through rectification, filtering, voltage stabilizing, boost, after the step-down the stable+5V of output and+direct current of 3.3V accomplishes; + 5V voltage stabilizer adopts TPS60110.
Further, described read/write circuit mainly is made up of the EM4095 of the compatible EM4205 of ability, EM4105 multiple transport protocols; The frequency of operation of said EM4095 is 100KHz-150KHz.
Further, described control circuit is made up of microcontroller STC89C58; It is responsible for starting EM4095 and receives the coded data by the EM4095 demodulation, is also undertaking the task of communicating by letter with computer application system.
Further, described interface circuit can adopt USB or bluetooth communication standard to realize the communication between read write line and the computer application system server; Communication chip is selected the FT232 chip for use; Bluetooth communication function ability and smart machine are set up wireless connections.
Further, described memory circuit adopts the AT24C256 chip of atmel corp, and memory capacity is 256Kbit; Because the max cap. of EM4305 electronic tag is 512bit, so the memory circuit that is made up of the AT24C256 chip can be preserved the complete information of 512 above objects.
Further, described display circuit is made up of the LCD liquid crystal display.
Further, described indicating circuit mainly is made up of a light emitting diode, a triode, 2 10K resistance.
Further, read write line can read the UID of electronic tag, can also carry out reading and rewriting effectively at a high speed to the 512bit EEPROM zone of the electronic tag of subsidiary enough information.The utility model is compared with prior art, has adopted the mode of modular design, and structure is more reasonable, and it is more clear that function is divided.Adopt the low frequency 134.2K hertz electromagnetic medium of easy absorption such as through-fall and liquid effectively, enlarged the applied environment of RFID.Novel self-bonded enameled wire has promoted the distance that reads simultaneously.Adopt single Embedded low-power scm can realize the multiple signals processing, simplified the structure of read write line, reduced cost.The output that is adopted as read write line of Bluetooth circuit has increased a new wave point, being connected of convenient and smart machine.LCD display and LED light be applied as that the user reads easily and the situation of understanding equipment provides good interface.
(4) description of drawings
Fig. 1 is the hardware structure diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 2 is the power circuit principle figure of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 3 is the read/write circuit schematic diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 4 is the control circuit schematic diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 5 is the interface circuit schematic diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 6 is the memory circuit schematic diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 7 is the display circuit schematic diagram of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Fig. 8 and Fig. 9 are the indicating circuit schematic diagrams of many interfaces of the portable 134.2K hertz of the utility model RFID read write line.
Wherein, Fig. 8 is a green light display circuit schematic diagram; Fig. 9 is a red light display circuit schematic diagram.
(5) embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1 is the hardware configuration composition of portable many interfaces of 134.2K hertz RFID read write line.Carry out further setting forth in detail in the face of the function of each ingredient down:
1, power unit
Power unit is by battery, voltage checking chip and boost and the step-down chip is formed.The utility model adopts the 3.7V lithium battery power supply, can be lithium cell charging through USB interface.Because there is the subelement WV to be respectively 5V and 3.3V, so need 3.7V voltage be boosted to 5V respectively, be depressurized to 3.3V, could solve the problem of all power supplies like this.
2, read-write part
The read-write part has read-write chip and antenna to constitute.Read-write chip adopts the EM4095 chip to design.The coded format that reads and writes data is the Man Cheshite coding, speed RF/64.Antenna is certainly around forming by novel enameled wire.
3, control section
Control section is CPU, adopts the STC89C58 single-chip microcomputer of Shenzhen macrocrystalline company.This single-chip microcomputer can utilize the USB mouth to download, and is easy to operate.This circuit is the core in addition, can control the order of entire circuit operation, accomplishes read-write operation, and carries out data processing and calculate.
4, interface section
The interface section comprises USB interface and bluetooth module.USB interface adopts more stable FT232 chip at present, realizes that the USB and the mutual commentaries on classics of serial ports operate, and the communication carried out of responsible USB interface and CPU.Make bluetooth communication control very simple after adopting novel bluetooth module, can be very convenient after the successful matching as operation of serial-port.
5, storage area
Storage area has adopted the AT24C256 chip of atmel corp, can store the UID and expansion area (EEPROM) data of electronic tag, and memory capacity is 256Kbit.
6, display part
The display part is LCD display.LCD display mainly shows the information that reads and about the operation information of equipment.
7, indicating section
Indicating section is a LED light.The pilot lamp flicker shows when reading electronic tag, can show green if normally read, and can not normally read then exhibit red.
Fig. 2 to Fig. 9 is the circuit theory diagrams of portable many interfaces of 134.2K hertz RFID read write line.Mainly comprise power circuit, read/write circuit, control circuit, interface circuit, memory circuit, display circuit and indicating circuit totally 7 parts.Pcb board adopts the doubling plate design, thickness of slab 1.5mm, and full technology has silk-screen, resistance weldering etc.The structure of PCB is with reference to enclosure designs, and is fixed according to the position of pilot lamp, switch, coil, battery and USB interface.The height of considering liquid crystal display in addition also has shell mechanism, and components and parts are basically all moved on to the pcb board middle part, and power circuit is very near from lithium battery, and the Card Reader circuit is very near from the Card Reader coil, can guarantee the shortest distance and the highest circuit operational efficiency of connecting like this.
Successively the each several part circuit is carried out detailed introduction below.
1, power circuit
The WV of EM4095 is+5V that STC89C58 single-chip microcomputer WV is+3.3V.Available 220V civil power through rectification, filtering, voltage stabilizing, boost, after the step-down the stable+5V of output and+direct current of 3.3V is its power supply.+ 5V voltage stabilizer adopts the TPS60110 of TI, and its application circuit is as shown in Figure 2.Carry out after the rectification lithium battery being charged through USB power utilization diode pair electric current in addition.
2, read/write circuit
The compatible multiple transport protocols (like EM4205, EM4150 etc.) of EM4095, frequency of operation 100kHz-150kHz; Do not need external crystal oscillator, utilize inner phase-locked loop pll just can obtain the resonance frequency with antenna matching; Adopt the amplitude modulation combined synchronous demodulation technique to have sleep pattern.Simple with the interface of microcontroller, the result is as shown in Figure 3 for the EM4095 pin, and the signal that antenna induction produces is through coupling capacitance input DMOD-IN end.This signal carries out bit comparison mutually with the input signal of antenna driver by phase comparator, forms the voltage corresponding with phase differential, as the control signal of voltage controlled oscillator, and the final locking that realizes the antenna emission signal frequency.The work of EM4095 is controlled by input signal SHD and MOD.During MOD=0, chip operation is in a reading mode; During MOD=1, chip operation is in the reading and writing pattern; During SHD=1, be sleep pattern.After the chip power supply, SHD should be earlier a high level, with the initialization chip.And then connecing low level, chip promptly is in reiving/transmitting state.The RDY_CLK end is used for to microcontroller the state of chip internal and the reference clock synchronous with receiving and transmitting signal being provided.Through inquiry RDY_CLK end signal state, microcontroller can confirm to receive from the DEMOD_OUT termination moment of data.
Read/write circuit by EM4095 constitutes is as shown in Figure 3, and C8, C13, C14, C18, C7, R2 form the LC resonant antenna.The working current of antenna is relevant with the Q value of resonant circuit.The value of adjustment L and R can improve the Q value, but the L value is fixing through resonant circuit basically, just can improve the Q value so reduce the R value.This employing diameter is that the coil about 0.4mm carries out coiling, and the Q value is modulated about 32 at last.
3, control circuit
Microcontroller STC89C58 is responsible for starting EM4095 and receives the coded data by the EM4095 demodulation.The SHD termination P1.2 of EM4095, MOD termination P1.1, RDY_CLK termination P1.0 is as the synchronous clock of encoding and decoding.The STC89C58 single-chip microcomputer is also being undertaken the task of communicating by letter with computer application system except control EM4095 chip operation.Concrete connection is as shown in Figure 4.The optional classical circuit of other circuit of STC89C58 (like clock circuit, reset circuit).
4, interface circuit
Can adopt USB or bluetooth communication standard to realize the communication between read write line and the computer application system server.The usb communication chip is selected FT232 interface conversion chip for use, and the electronic switch that has CD4052 to open as bluetooth.With the transmission data line and the cross connection of reception data line of computing machine and STC89C58 single-chip microcomputer, and shared ground wire.Interface circuit is as shown in Figure 5.
5, memory circuit
Memory circuit is as shown in Figure 6, the P1.5 of WP termination STC89C58, the P1.6 of SCL termination STC89C58, the P1.7 of SDA termination STC89C58.Memory circuit adopts the AT24C256 chip of atmel corp, and memory capacity is 256Kbit.Because the max cap. of EM4305 electronic tag is 512bit, so the memory circuit that has the AT24C256 chip to constitute can be preserved the complete information of maximum 512 objects.
6, display circuit
Display circuit is being connected of LCD liquid crystal display and microprocessor STC89C58.The LCD liquid crystal display is as shown in Figure 7, and the RS end is connected with the P2.0 of STC89C58, and the RW end is connected with the P2.1 of STC89C58, and the E end is connected with the P2.2 of STC89C58, and the RST end is connected with the P2.3 of STC89C58, and the BLCD end is connected with the P2.4 of STC89C58.
7, indicating circuit
Indicating circuit mainly is made up of a light emitting diode D1, a triode 9013 (Q1), 2 10K resistance (R3, R4).The GLED end is connected with the P2.5 of STC89C58, green light, and circuit is as shown in Figure 8; The RLED end is connected with the P2.6 of STC89C58, glows, and circuit is as shown in Figure 9.
The basic parameter of many interfaces of the portable 134.2K hertz of the utility model RFID read write line is following:
(1) the read write line radio-frequency spectrum is the 134.2K hertz.
(2) read write line maximum identification distance greater than 7cm ± 2cm (look read write line battery and environment and decide, add prolong antenna can prolong read apart from).
(3) read write line Applicable temperature :-20 ℃ /+70 ℃.
(4) read write line is suitable for humidity: 45%RH/80%RH
(5) data storage: 256Kbit
(6) work power consumption: less than 10W
(7) power supply: during 1000mA
(8) communication interface: USB, bluetooth
(9) system parameter setting: support online setting
(10) antennal interface: the cloudy head of SMA type
(11) communications protocol: Manchester coding, RF/64.
Claims (9)
1. portable many interfaces of 134.2K hertz RFID read write line is characterized in that: the power circuit that comprises the WV that whole read write line is provided; The radiofrequency signal of 134.2K hertz CF be can send, faradic antenna and the read/write circuit of realizing data-modulated, demodulation and receiving and transmitting signal produced when making the target of adhering to electronic tag get into the perform region of emitting antenna; Can make corresponding processing and control to the valid data behind the demodulation sign indicating number according to the identity of this label of logical operation identification, and send the control circuit that the instruction control read write line is accomplished different read-write operations; Can be the interface circuit of the related data of electronic tag output; The memory circuit of the related data of ability store electrons label; The indicating circuit of display circuit that also comprises the result that can on the LCD liquid crystal display, present read-write and the running status that is used to show said many interfaces read write line.
2. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1 is characterized in that: described power circuit can with the 220V civil power through rectification, filtering, voltage stabilizing, boost, after the step-down the stable+5V of output and+direct current of 3.3V accomplishes; + 5V voltage stabilizer adopts TPS60110.
3. a kind of making according to claim 1 taken many interfaces of formula 134.2K hertz RFID read write line, it is characterized in that: described read/write circuit mainly is made up of the EM4095 of the compatible EM4205 of ability, EM4105 multiple transport protocols; The frequency of operation of said EM4095 is 100KHz-150KHz.
4. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1, it is characterized in that: described control circuit is made up of microcontroller STC89C58; It is responsible for starting EM4095 and receives the coded data by the EM4095 demodulation, is also undertaking the task of communicating by letter with computer application system.
5. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1, it is characterized in that: described interface circuit can adopt USB or bluetooth communication standard to realize the communication between read write line and the computer application system server; Communication chip is selected the FT232 chip for use; Bluetooth communication function ability and smart machine are set up wireless connections.
6. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1 is characterized in that: described memory circuit adopts the AT24C256 chip of atmel corp, and memory capacity is 256Kbit; Because the max cap. of EM4305 electronic tag is 512bit, so the memory circuit that is made up of the AT24C256 chip can be preserved the complete information of 512 above objects.
7. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1, it is characterized in that: described display circuit is made up of the LCD liquid crystal display.
8. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1, it is characterized in that: described indicating circuit mainly is made up of a light emitting diode, a triode, 2 10K resistance.
9. a kind of portable many interfaces of 134.2K hertz RFID read write line according to claim 1; It is characterized in that: read write line can read the UID of electronic tag, can also carry out reading and rewriting effectively at a high speed to the 512bit EEPROM zone of the electronic tag of subsidiary enough information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206316927U CN202153360U (en) | 2010-11-30 | 2010-11-30 | Portable 134.2 KHz RFID multi-interface reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206316927U CN202153360U (en) | 2010-11-30 | 2010-11-30 | Portable 134.2 KHz RFID multi-interface reader-writer |
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| CN202153360U true CN202153360U (en) | 2012-02-29 |
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| CN2010206316927U Expired - Fee Related CN202153360U (en) | 2010-11-30 | 2010-11-30 | Portable 134.2 KHz RFID multi-interface reader-writer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516232A (en) * | 2012-06-15 | 2014-01-15 | 上海宝信软件股份有限公司 | High-accuracy loosely-coupled multi-level voltage output type power allocation circuit |
| CN103914719A (en) * | 2014-04-18 | 2014-07-09 | 广州健新自动化科技有限公司 | RFID tag read-write device |
| CN105160387A (en) * | 2015-06-22 | 2015-12-16 | 杭州玖欣物联科技有限公司 | Magnetic coupling radio frequency identification tag circuit applying loop coil antenna |
| CN107679430A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of control circuit for RFID intelligent read equipment |
-
2010
- 2010-11-30 CN CN2010206316927U patent/CN202153360U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516232A (en) * | 2012-06-15 | 2014-01-15 | 上海宝信软件股份有限公司 | High-accuracy loosely-coupled multi-level voltage output type power allocation circuit |
| CN103516232B (en) * | 2012-06-15 | 2015-11-18 | 上海宝信软件股份有限公司 | A kind of power supply dispensable circuit of high-precision loose coupling multilevel voltage output |
| CN103914719A (en) * | 2014-04-18 | 2014-07-09 | 广州健新自动化科技有限公司 | RFID tag read-write device |
| CN105160387A (en) * | 2015-06-22 | 2015-12-16 | 杭州玖欣物联科技有限公司 | Magnetic coupling radio frequency identification tag circuit applying loop coil antenna |
| CN105160387B (en) * | 2015-06-22 | 2018-01-26 | 杭州玖欣物联科技有限公司 | A kind of magnetic coupling radio frequency identification label system using loop coil antenna |
| CN107679430A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of control circuit for RFID intelligent read equipment |
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