CN2872476Y - Manual passive radio-frequency label reader - Google Patents
Manual passive radio-frequency label reader Download PDFInfo
- Publication number
- CN2872476Y CN2872476Y CN 200620054982 CN200620054982U CN2872476Y CN 2872476 Y CN2872476 Y CN 2872476Y CN 200620054982 CN200620054982 CN 200620054982 CN 200620054982 U CN200620054982 U CN 200620054982U CN 2872476 Y CN2872476 Y CN 2872476Y
- Authority
- CN
- China
- Prior art keywords
- antenna
- radio frequency
- read
- write
- circuit
- 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
- Near-Field Transmission Systems (AREA)
Abstract
This utility model discloses a portable non-energy radio frequency label read-write device, which comprises a palmtop computer PDA, a read-write module consisting of a control unit and a radio frequency unit, an antenna, an antenna reflecting plate, a wave absorbing device; wherein, the palmtop computer PDA is connected to the radio frequency unit through the control unit, the antenna is fixed onto one surface of the antenna reflecting plate, and the wave absorbing device and the read-write module are fixed onto the other side of the antenna reflecting plate. The palmtop computer PDA completes such functions as user interface operation and management; the control unit completes such functions as the palmtop computer PDA user operation command receiving, communication protocol analysis, radio frequency unit control, information decoding of echo from the label, and power supply management; the radio frequency unit is responsible for the generation and emission of the microwave modulation power signal, and the demodulation of the zero intermediate frequency of the electronic label echoed signal. By using the aforesaid structure, the utility model produces positive effects in read-write speed, reliability, interference-free feature and product miniaturization.
Description
Technical field
The utility model relates to a kind of electronic label read/write, particularly a kind of hand-hold passive radio frequency label read-write machine.
Background technology
The read-write system of passive RF label claims rfid system again, generally is made up of read write line, electronic tag and antenna.At present the electronic tag in this field is divided into two kinds of passive label (Passive tags) and active tag (Active tags).Self has powered battery active tag, and read/write distance is far away, and simultaneously volume is bigger, and to compare cost higher with passive label, is also referred to as active label.The required energy of acquisition work in the electromagnetic field that passive label is produced by reader, cost is very low and have very long serviceable life, and littler also lighter than active tag, reading/writing distance is then nearer, is also referred to as passive label.The employed frequency of radio frequency identification is called as the frequency of operation of rfid system, is divided into 3 scopes basically: low frequency (30kHz-300kHz), high frequency (3MHz-30MHz) and ultrahigh frequency (300MHz-3GHz).Common frequency of operation has low frequency (125kHz, 134.2kHz) and high frequency (13.56MHz) and ultrahigh frequency (900MHz, 2.4GHz) or the like.The utility model is to belong to ultrahigh frequency (UHF) passive type radio frequency identification (RFID) technical field.
But the technical indicator of existing passive radio electronic label read write line is
(1) reading/writing distance: 10cm～6m;
(2) read or write speed: reading 32bits is more than the 20ms, and writing 32bits is more than the 50ms;
(3) emissive power adjustment: by hardware, the artificial adjustment, more complicated, difficulty is big;
(4) emissive power flatness:＞0.5dBm;
(5) traffic rate:＜19200bps;
(6) data-interface: model is RS-232 or RJ-45.
In reading/writing distance, read or write speed, reliability, antijamming capability and intelligent product and the deficiency that all exists easy to use.Maximum deficiency is that existing read write line volume is bigger, can't realize the hand-held function of using.
The utility model content
The technical problems to be solved in the utility model provides that a kind of reading/writing distance is far away, read or write speed is fast, reliability and the strong hand-hold passive radio electronic label read write line of antijamming capability.
In order to solve the problems of the technologies described above, the utility model provides a kind of hand-hold passive radio frequency label read-write machine, its special character is, the reader/writer module that comprises palm PC, forms by control module and radio frequency unit, antenna, antenna-reflected plate, inhale wave apparatus, described palm PC is operatively connected to radio frequency unit by control module, and described antenna is fixed on described antenna-reflected plate one side, described suction wave apparatus and described module for reading and writing and is fixed on the other one side of antenna-reflected plate.
In order better to solve the problems of the technologies described above, the control module of hand-hold passive radio frequency label read-write machine of the present utility model comprises serial line interface, single-chip microcomputer, CPLD, power supply unit and electric battery, described serial line interface is connected in described single-chip microcomputer, described electric battery is connected in described single-chip microcomputer by described power supply unit, and described single-chip microcomputer connects with data line with described CPLD.Described radio frequency unit comprises radio-frequency transmissions circuit, radio demodulating circuit, phaselocked loop and circulator, described radio-frequency transmissions circuit, radio demodulating circuit and phaselocked loop link to each other with described CPLD, described circulator connects with described radio-frequency transmissions circuit and described radio-frequency (RF) receiving circuit, and described antenna is connected in described circulator.Described radio-frequency transmissions circuit comprises that low noise amplifier, modulator and power amplifier are composed in series successively.Described radio demodulating circuit is composed in series successively by detuner, pulse amplifier and comparison shaping circuit, described low noise amplifier is connected with described CPLD with described relatively shaping circuit, and described power amplifier is connected with described circulator with described detuner.Described suction wave apparatus is the polyfoam that contains the metal powder of dispersion.Described suction wave apparatus is arranged on reader/writer module with the opposite one side of antenna.Described reader/writer module is that printed circuit board (PCB) is made more than 6 layers or 6 layers.Described antenna comprises antenna oscillator and support bar, and described antenna oscillator is fixed on the described antenna-reflected plate by described support bar.Described antenna oscillator is parallel with described antenna-reflected plate.Described suction wave apparatus is close to described reader/writer module.
Adopt hand-hold passive radio frequency label read-write machine of the present utility model, technique effect has been to realize that read-write capability realize that be very easy to use, read or write speed is fast on a machine that can grip with palm, and antijamming capability is strong.Read-write object is a passive electronic label, and not only size is little, in light weight, long service life, price are low, and has avoided replacing battery or the charging and because the troubles such as use dispute that battery causes of active electronic label.Ability with remote reading tag data.Can the quick identification label, than the fast several times of the read or write speed of general read write line.Owing to take the composite design scheme, not only make the circuit compactness, whole hardware platform device is few, volume is little, low price, and the circuit hear rate reduces, reliability is higher, and it is stronger to adapt to the working environment ability.Use more conveniently, multiple output interface, radio-frequency power software control, antenna joint detection and duty acousto-optic hint all provide very big convenience for the user.The utility model can be designed as has the intelligent characteristic product, can directly be connected use with industrial control unit (ICU).
The utility model can be used for article identification and data acquisition, utilizes the superperformance that the utlity model has, and will extensively be applied in following field.Warehouse logistics management: electronic tag can substitute existing bar coded sticker, and has more excellent characteristic, all has wide application prospects for the drifting management of flow of goods and warehousing management and mail, parcel, aviation luggage etc.; Transportation management: highway, railway transport administration, encased conveying management etc.; Customs's management of being open to the custom: customs is open to the custom, changes the goods and materials and the vehicle management of pass; Motor vehicle management: departments such as public security, traffic are to the monitoring and the management of various motor vehicles; The toll on the road and bridge: owing to the utlity model has the ability of remote high speed reading tag data, the toll on the road and bridge can not stopped and be carried out, and is particularly useful for expressway tol lcollection; Parking lot management: realize management and charge robotization; Entrance guard management: comprise Vehicle And Personnel's turnover management; Explained hereafter flow process: in whole process of production, monitor parts; Product false proof: utilize label internal storage write-protect function, authenticity of products is differentiated.
Description of drawings
Fig. 1 is the utility model structural drawing;
Fig. 2 is the utility model electric function structured flowchart a;
Fig. 3 is the utility model electric function structured flowchart b;
Fig. 4 is the utility model sign indicating number type, information coding and command timing figure;
Fig. 5 is the separation circuit of the utility model signal ground current potential and power supply potential;
Fig. 6 is the direct zero intermediate frequency demodulator circuit of the utility model;
Fig. 7 is the utility model CPLD building-block of logic;
Fig. 8 is the utility model output power controlling circuit;
Fig. 9 is the utility model antenna connection detection circuit;
Figure 10 is that the utility model self-adaptation on-line software is handled block diagram;
Figure 11 is the utility model label write-protect software control block diagram;
Figure 12 is the utility model software configuration synoptic diagram;
Figure 13 is the utility model structural representation;
Figure 14 is the utility model structural representation.
Embodiment
Accompanying drawings embodiment of the present utility model.
See also Fig. 1～Fig. 3, Figure 12, shown in Figure 13, the read write line of the hand-hold passive radio-frequency (RF) tag of present embodiment, is inhaled wave apparatus 77 at the reader/writer module that comprises palm PC PDA, is made up of control module and radio frequency unit, antenna 29, antenna-reflected plate 78.Control module comprises serial line interface 10, single-chip microcomputer 9, CPLD (CPLD) 5, power supply unit and electric battery, and radio frequency unit comprises radio-frequency transmissions circuit, radio demodulating circuit, phase-locked loop frequency synthesizer 12, circulator 1.The radio-frequency transmissions circuit comprises low noise amplifier 6, modulator 7, power amplifier 8, and the radio demodulating circuit is composed in series successively by detuner 2, pulse amplifier 3, comparison shaping circuit 4.Described palm computer PDA connects with single-chip microcomputer 9 by the serial line interface 10 in the control module, and described CPLD 5 is connected to low noise amplifier 6, the phaselocked loop 12 of radio frequency unit and compares shaping circuit 4.
Described antenna 29 is fixed on described antenna-reflected plate 78 one sides, and described suction wave apparatus 77 and described reader/writer module are fixed on antenna-reflected plate 78 one side in addition.
The effect of circulator 1 be with microwave transmit with the microwave receiving Signal Spacing with separate, guarantee that microwave transmits can flow to antenna 29 and not enter the radio demodulating passage that the microwave signal that antenna 29 receives can enter the radio demodulating circuit by circulator 1.The effect of radio-frequency transmissions circuit is that the command code that will mail to label is modulated on the transmission frequency by modulator 7, and carries out microwave power by power amplifier 8 and amplify.The effect of radio demodulating circuit is that label is handled by the echoed signal that antenna receives, and comprises by detuner 2 carrying out the zero intermediate frequency demodulation, carrying out processing and amplifying and comparison shaping circuit 4 compares shaping processing etc. by pulse amplifier 3.CPLD 5 is finished the digital control function of whole read write line, it bear the generation of label echo detection, decoding and buffer memory, modulation waveform ASK sequence and transmission, Cyclic Redundancy Check verification and with task such as single-chip microcomputer 9 swap datas.Why adopting CPLD 5 to be because its power consumption that needs is extremely low, is that the application of hand-held is very desirable for battery powered portable use.In addition, the hand-held read write line is battery-powered, thus hardware many power unit circuit, software is many as the power supply unit of power management part.Single-chip microcomputer 9 is processing enters of whole read write line, it to finish that the explanation of client personal computer machine message packet, serial communication, single-chip microcomputer instruction control word produce, electronic tag data reads and write, CPLD 5 data storage and download, radio-frequency power control, phase-locked loop frequency control etc.Serial communication interface 10 is finished the data communication of read write line and external unit.Phase-locked loop frequency synthesizer 12 provides various frequency standards for whole read write line.
Read-write object of the present utility model, promptly electronic tag is the novel passive electronic tag that adopts the Sahara RW9000 of U.S. SCS company series and the SENSE of our company 9000 series, its technology is carried out the ISO-18000 industry standard.Their frequency of operation is an ISM wave band (902～928MHz); The card memory size is 1 kilobit (kBits) (wherein 928Bits develops use for the user); Read or write speed: average every 32bits reads minimum about 1.4 milliseconds (ms) consuming time, writes the minimum 30ms consuming time of average every 32bits; Adopt the multiple-unit access instruction, only to the label of proprietary application system discern, read-write operation; Possess the anti-collision communications protocol, can operate simultaneously a plurality of labels; Adopt frequency hopping, have very strong antijamming capability.The base material of label and packing forms have papery basic unit, the band self-adhesive encapsulation of soft film basic unit, Polyvinylchloride (PVC) basic unit, ABS encapsulation, ceramic package etc.They can be pasted on object surfaces such as papery, plastic and glass respectively, adopt the special stand Pasting in the metal surface.
During operation, earlier with the read write line power supply opening, by palm PC PDA control single chip computer 9, single-chip microcomputer 9 at first passes through single-chip microcomputer---and CPLD bus (address bus 59 and data bus 63) downloads executive software for field-programmable gate circuit 5, makes CPLD 5 operate as normal.When the user sends order or request by serial communication interface 10 or combined communication interface 11, the order that produces the operation label of single-chip microcomputer 9 certificates, notice CPLD 5 produces amplitude keying (ASK) waveform signal, mailing to the radio-frequency transmissions circuit goes, modulated RF modulator 7, again through radio-frequency power amplifier 8, circulator 1, by antenna 29 to the space radiation microwave.Electronic tag is subjected to the excitation that read write line is sent microwave energy, starts working.After it receives the order of read write line, promptly beam back the microwave signal of response command to read write line according to order request, receive and circulator 1 by read write line enters the radio demodulating circuit by antenna 29, amplify, compare reshaper 4 shapings through detuner 2 demodulation, pulse amplifier 3, obtain the baseband signal (DATA) of label, these baseband signals obtain the label echo data again after processing such as CPLD 5 samplings, digital filtering, relevant judgement, deposit in its storer, and notice single-chip microcomputer 9.Single-chip microcomputer 9 is issued the user through serial communication interface 10 or combined communication interface 11 after doing further processing from CPLD 5 taking-up label informations, answers user's order or request.In addition, CPLD 5 also by the power supply of radio-frequency power supply port (RF_PW) control radio-frequency power amplifier 8, makes read write line be controlled to aerial radiation electric wave; The information of CPLD 5 receiving antennas, 29 connection detection circuit (RF_JC) is judged and is indicated antenna 29 connection status by antenna pilot lamp (ANT).Single-chip microcomputer 9 is also controlled the output power of radio-frequency power amplifier 8 by automated power control port (APC); Single-chip microcomputer 9 is sent echo comparison reference (REF) to the comparison shaping circuit 4 of radio demodulating circuit, for its relatively shaping.
See also shown in Figure 4ly, according to the ISO-18000 standard, in order to improve rapidity, reliability, the security of communicating by letter between electronic tag and the read write line, the utility model is taked following measure in the design of the communication protocol between read write line and the label.
It at first is arouse machine processed, the effect that wakes up is the tag activation that will enter in the reading and writing device antenna active region, the label that only is waken up could communicate with read write line, prevents the interference of outer other label of locking system, guarantees the reliable and accurate of read write line and native system label information exchange.Next is yard type and information code Design, the coding of the information code type that the utility model adopts and " 0 " in order and the response and " 1 " information.The design of specific command sign indicating number, the specific command code type of the utility model setting have " waking up " order, " reading " order, " writing " order, " write-protect " order, " inquiry write-protect " order etc., and its yard type and sequential are seen shown in Figure 3.That these command codes have adopted is novel, distinguished special format and algorithm, reliability, security, high efficiency when having increased read-write passive RF electronic tag greatly.The rapid answer communication mechanism, the utility model can detect real-time to each information bit of the response message of label, fast response; In case the discovery information errors, termination at once recovers again, thereby has improved the speed of information exchange between read write line and the label.Many label communications mechanism adopts scale-of-two linear search tree algorithm, realizes a plurality of electronic tags are operated simultaneously fast.The data error-check has adopted the combined dual error-check of special Cyclic Redundancy Check and parity checking, guarantees the correctness and the reliability of electronic tag data, improves recognition accuracy.Information security, the utility model increases special function codes such as write-protect, and the part tag storage information of appointment is implemented protection, prevents that significant data from being rewritten, and guarantees data security.
Modulation and the reception of emission and echoed signal and the effect of demodulation in order to strengthen command code adopt following scheme.
See also shown in Figure 5ly, the signal ground current potential separates with the power supply earth potential.Because high low signal amplifies simultaneously, not only the circuit working load is heavy, and the interference that causes by power supply is very big, at signal and power supply altogether the time, and the circuit instability, control circuit is easy to cause erroneous judgement.After having adopted the earthy separation circuit of signal ground current potential and power supply, make the receiving cable circuit working stable, echo is clean, clear.Wherein, reg+5vr sends into the U3A3 pin of emitter follower amplifier (U3A) (model is MAX4020) through resistance R 3, resistance R 4 dividing potential drops after electric capacity R9, the electric capacity R10 filtering.U3A1 pin current potential equals U3A4 pin current potential; Because resistance R 3 is identical with resistance R 4 sizes, so the DC potential of U3A1 pin equals 1/2 of reg+5vr place current potential, and the ac potential of U3A1 pin equals power supply ground, and reason is the interchange bypass that electric capacity R9, electric capacity R10, electric capacity R4, electric capacity R6 form.Adopting foregoing circuit to make with the relevant signal ground power supply ground relevant with following power supply of signal separates fully.
See also shown in Figure 6ly, adopt circuit shown in it can realize direct zero intermediate frequency demodulation scheme.Directly the zero intermediate frequency demodulation scheme can directly demodulate the signal of electronic tag apace from the echoed signal of electronic tag, has avoided the complicacy and the difficulty of the secondary mixing technology of common microwave receiver employing, thereby has improved the reliability that system receives.
Its course of work is as follows, the information of electronic tag reflected back is sent into circulator after dual-mode antenna receives, received signal after circulator separates receiving and transmitting signal, be the signal that electronic tag returns, send into the orthogonal demodulation circuit of forming by chip U73 (model is BP2C), chip U79 (model is RMS-2H), chip U70 (model is QCN-12) and chip U71 (model is RMS-2H) etc.Its chips U79, chip U70 are frequency mixer.Mixed frequency signal by the frequency mixer generation: difference frequency is F
LO-F
RFBe F frequently
LO+ F
RFBecause local oscillation signal (F
LO) and the radiofrequency signal (F of radio-frequency transmissions circuit
RF) all take from same signal source, promptly phaselocked loop 12, and the signal that electronic tag returns and the radiofrequency signal of transmission channel be frequency together, therefore, difference frequency (that is intermediate frequency) F
LO-F
RF=0, the modulated signal that label returns then directly is demodulated into baseband signal.With frequency F
LO+ F
RFMuch larger than the frequency of operation of mixing and by elimination.
Be in harmonious proportion the radio-frequency transmissions circuit with getting a signal source because zero intermediate frequency is separated, promptly save a signal source, both be easy to realize, save cost again, improve the reliability of system simultaneously.
As Fig. 3, shown in Figure 7, it is XC2S50TQ144 that CPLD 5 is selected model for use, its principal character is, 50,000 programmable gate, up to the block RAM resource of 32Kbit, up to 784 CLB logical resources, have 121 programmable Is/O resource, abundant internal wiring resource, its internal logic structure is as shown in Figure 7.Data bus 63 provides data message for command register 52, command register 52 is used to deposit single-chip microcomputer 9 and sends the order that will send also here, command interpretation state machine 53 produces state transitions and redirect according to the order in the command register 52, generates order data and gives ASK pulse producer 54; ASK pulse producer 54 produces according to command interpretation state machine 53 order datas and sends corresponding ASK modulation waveform to the radio-frequency transmissions circuit.The address information that address decoder 55 translating address buses 59 provide, 56 pairs of label echo signals of Echo Processing logic device are sampled and are compared, and judge the echo data state, decode echo data, by echo latching logic device 57 buffer memorys.The state machine of command interpretation simultaneously 53 produces look-at-me, is read by single-chip microcomputer 9, does further processing.Check logic 58 provides corresponding hardware CRC computing fast for single-chip microcomputer 9.The clock source is that the external crystal-controlled oscillation of 40MHz provides.Frequency division is carried out in 59 pairs of clock sources of clock division logic 13, for CPLD 5 logics provide the clock signal of 0.1 microsecond (us), 1us and 90us, is used for the generation of the sequential under the various situations.
The model that single-chip microcomputer is selected for use is C8051F126, and its principal character is high speed 8051 kernels, instruction pipeline structure; 256 byte RAM, 8K byte XRAM, 128K byte FLASH, 64 * 4 byte Cache; 8 I/O mouths (P0～P7), thereby the general purpose I/O pin of abundant (totally 64) is arranged; Dual uart serial ports, two 12 DAC digital to analog converters, 10 ADC analog to digital converters and 8 ADC analog to digital converters; 3.3V operating voltage.
Partly provide RS-232, RS-485 and Wiegand system's output interfaces such as (Wei roots) in communication interface, RS-485 and Wiegand interface have been Duoed than general read write line, especially the Wiegand interface can be convenient, fast, neatly with various industrial control equipment seamless links, greatly increased range of application and application scenario.
Partly provide RS-232, RS-485 and Wei Gen system's output interfaces such as (Wiegand) in communication interface, RS-485 and Wiegand interface have been Duoed than general read write line, especially the Wiegand interface can be convenient, fast, neatly with various industrial control equipment seamless links, greatly increased range of application and application scenario.
See also shown in Figure 8ly, adjust not too conveniently in actual use because radio-frequency emission power is artificial, adjust also more complicated and difficulty, the utility model has increased the way by the software control radio-frequency emission power, brings convenience to use.U2 (model is PF01411) is power amplifier (PA), and radio frequency (RF) input signal is by the U21 pin input of U2, and the U24 pin is exported, and the U22 pin is the power control end, and control signal is from CPU.The DC potential that changes the U22 pin can change the output power of power amplifier (PA).Radio frequency power output (RFOut) obtains by test with the relation of power control input voltage amplitude, makes form and corresponding curve, and software is sent the controlling value of power control input by tabling look-up according to the radio frequency power output actual needs.
For preventing that the output of power amplifier level is unloaded, protection radio-frequency (RF) power amplification pipe is not damaged, the utility model is set up the antenna connection detection circuit.When antenna does not connect or bad connection, system's light warning then, the radio-frequency (RF) power amplification pipe stops to launch radio-frequency power automatically.
Adopt software design to guarantee function modoularization in the present embodiment.Software function sees also shown in Figure 12, mainly is divided into PDA application software module, API protocol process module, serial communication and protocol-analysis model, tag operational processing module, system's control and block of state and label protocol control treatment module.
The PDA application software module provides operation interface and administration interface for the user; The API protocol process module is the bridge that connects application software and first floor system, and the built-in function of operation underlying device is provided for application software; Serial communication and protocol-analysis model receive the order that API sends, and carry out verification, and protocal analysis returns deal with data to upper strata API then; Tag operational processing module (comprising " reading label ", " writing labels ", " write-protection label " and operations such as " inquiry write-protects ") provides the basic function to tag operational; System control and state (comprise " systematic parameter " and " system state " etc.) module is controlled each parameter of internal system work and the various states of system such as is inquired about at function; The label protocol control module produces the command waveform of electronic tag.
See also shown in Figure 13 and 14, the micro-integrated read write line of present embodiment integrates antenna and read-write capability unit, and PDA is optional.For making compact conformation, take following measure: at first, an embedded miniature antenna.Satisfying on the basis of technical indicator, reduce antenna size as far as possible, and directly be welded on the circuit board.Secondly, 6 layers of design of pcb board, the printed board design is the key of miniaturization, the first increases the number of plies of printed board, increases to 6 layers by 4 layers of original 181X; It two is to adopt two-sided paster, and it three is plate face compact in design.At last, all adopt small-sized components and parts.
See also Fig. 3, shown in Figure 9, for preventing that the output of function amplifier stage is unloaded, protection radio-frequency (RF) power amplification pipe is not damaged, the utility model is set up the antenna connection detection circuit.When antenna does not connect or bad connection, system's light warning then, the radio-frequency (RF) power amplification pipe stops to launch radio-frequency power automatically.When ground connection type antenna 29 is connected with read write line when good through capacitance C99, the current potential that D99 is ordered is 0 volt; And do not connect antenna 29 or during when read write line with the antenna bad connection, and when promptly inductance L 99 is infinitely great, there is not pressure drop on the resistance R 99, the current potential that D99 is ordered then is+5 volts.The D99 point directly links to each other with CPLD 5, and CPLD 5 can be made antenna in view of the above and connect judgement whether not good, that report to the police and whether export.
The built-in hummer of read write line, read write line is whenever read the electronic tag signal, then sends sound, reminds the user.Three light emitting diodes (LED) are set: red light indication power supply; The amber light marker antenna connects; The green light designation data.This acousto-optic hint mode provides great convenience for system integration test and site test.
According to the different demands of user to applying in radio frequency identification, three kinds of models of the utility model design are to adapt to the different application scope.First kind is suitable for read-only application, and read write line only reads the electronic tag numbering that is attached on the body surface with timing or triggering mode work; Second kind is suitable for the readable application of writing, and read write line only just carries out work after receiving control command, can carry out read or write to any storage unit on the electronic tag.The third is suitable for authorizing the readable application of writing, and read write line only just carries out work after receiving control command, and any storage unit on the electronic tag is authorized read-write operation.
Read write line comprises the self-adaptation on-line software in the present embodiment, and its treatment step sees also shown in Figure 10.The purpose that adopts software control is in order to adapt to the situation that read write line and PC machine adopt serial ports to carry out communication.In order to improve the read or write speed of read write line, should use the highest communication speed.But because existing electromagnetic field environment differs, if adopt fixedly baud rate, then possibly in the big place of environmental interference can't communication; And in the little place of environmental interference, then lose time.Adopted the self-adaptation on-line mode, then can select high as far as possible baud rate to carry out serial communication according to site environment.When the principle that realizes software control is the read write line start, set baud rate 2400bps, PC also carries out online with same baud rate and read write line, after the online success, both sides select more higher leveled baud rate further online, and till can't be online, both sides remodify baud rate and are 2400bps afterwards, carry out onlinely then with maximum baud rate that can UNICOM, and carry out work with this baud rate.If occur communication failure in the course of work, then online again, select high as far as possible communication baud rate under the current environment, thereby the assurance system is always with maximum baud rate work.
See also shown in Figure 11ly, the label write-protect is in some purposes, and the partial data of label inside can not at will be changed.In order to prevent that these data from arbitrarily being changed, to provide the write-protect function is carried out in the label segment zone, can be implemented in and to read under some situation but cannot write.
The technical indicator that hand-hold passive radio frequency label read-write machine in the present embodiment can reach is listed in the table below:
| Sequence | Content | Index | |
| 1 | Frequency of operation | ISM 902～928MHz |
| 2 | Mode of operation | Fixed frequency or frequency hopping work, frequency is 500KHz (software setting) at |
| 3 | Power bracket | Software control :+20dBm～+ 31.5dBm (instantaneous peak value) minimum step value (software setting)＜0.2 |
| 4 | Power flatness | ＜0.5 ± |
| 5 | Antenna | Built-in microwave antenna: gain 5dBi. |
| 6 | |
1 RS-232 |
| 7 | The PDA cpu performance | Intel X Scale PXA255 400MHz (externally positioned type is identical with selectable unit PDA) |
| 8 | The storage data capacity | 64MB SDRAM/32MB Flash (every 32MB maximum can be stored about 500,000 Sahara smart card ID data) (selectable unit PDA is identical) |
| 9 | Display | 3.5 " the color TFT touch-screen (selectable unit PDA is identical) of 6.5 Wan Sezhen |
| 10 | Read-write capability | 1) reading and writing Sense9000 series Sahara agreement radio frequency smart card; 2) maximum read distance: 1.2M (power setting is when+31.5dBm (peak value) is supporting with the RW9520 card); |
| 11 | The label read or write speed | 1) read or write speed software can be provided with; 2) the fastest read or write speed when label total data (read and write single) can be set: on average read every 32bits:＜10ms; |
| On average write every 32bits:＜60ms. | ||
| 12 | Application software platform | 1) is suitable for operating system: Pocket PC2003; 2) provide API kit (optional accessory); 3) Default Value is supported programming tool: eVCEvb. |
| 13 | Power supply | 1) lithium battery :+3.7V 2000mAh (stand-by time＞24 hour, continuous working＞120 minute); 2) charging adapter. |
| 14 | Overall dimensions and weight | Overall dimensions (PDA selectable unit): the about 500G of 145 * 90 * 50 mm (the embedded type of PDA): the about 400G of 155 * 80 * 31mm |
Claims (10)
1, a kind of hand-hold passive radio frequency label read-write machine, it is characterized in that: comprise that palm PC PDA, the reader/writer module, antenna, antenna-reflected plate, suction wave apparatus, the described palm PC PDA that are made up of control module and radio frequency unit are operatively connected to radio frequency unit by control module, described antenna is fixed on described antenna-reflected plate one side, described suction wave apparatus and described module for reading and writing and is fixed on the other one side of antenna-reflected plate.
2, hand-hold passive radio frequency label read-write machine according to claim 1, it is characterized in that: described control module comprises serial line interface, single-chip microcomputer, CPLD, power supply unit and electric battery, described serial line interface is connected in described single-chip microcomputer, described electric battery is connected in described single-chip microcomputer by described power supply unit, and described single-chip microcomputer connects with data line with described CPLD.
3, hand-hold passive radio frequency label read-write machine according to claim 2, it is characterized in that: described radio frequency unit comprises radio-frequency transmissions circuit, radio demodulating circuit, phase-locked loop frequency synthesizer and circulator, described radio-frequency transmissions circuit, radio demodulating circuit and phase-locked loop frequency synthesizer link to each other with described CPLD, described circulator connects with described radio-frequency transmissions circuit and described radio-frequency (RF) receiving circuit, and described antenna is connected in described circulator.
4, according to claim 1,2 or 3 described hand-hold passive radio frequency label read-write machines, it is characterized in that: described radio-frequency transmissions circuit comprises that low noise amplifier, modulator and power amplifier are composed in series successively, describedly be composed in series successively by detuner, pulse amplifier and comparison shaping circuit, described low noise amplifier is connected with described CPLD with detuner, and described power amplifier is connected with described circulator with described relatively shaping circuit.
5, hand-hold passive radio frequency label read-write machine according to claim 4, it is characterized in that: described suction wave apparatus is arranged on a side of described antenna-reflected plate with described reader/writer module, and the two is separately positioned on the not ipsilateral of antenna-reflected plate with described antenna as a whole.
6, hand-hold passive radio frequency label read-write machine according to claim 5 is characterized in that: described suction wave apparatus is close to described reader/writer module.
7, hand-hold passive radio frequency label read-write machine according to claim 1 is characterized in that: described suction wave apparatus is the polyfoam that contains the metal powder of dispersion.
8, hand-hold passive radio frequency label read-write machine according to claim 1 is characterized in that: described reader/writer module is made by printed circuit board (PCB) more than 6 layers or 6 layers.
9, hand-hold passive radio frequency label read-write machine according to claim 1, it is characterized in that: described antenna comprises antenna oscillator and support bar, antenna-reflected plate, described antenna oscillator is fixed on the described antenna-reflected plate by described support bar, and described antenna oscillator and described antenna-reflected plate can be arranged in parallel.
10, hand-hold passive radio frequency label read-write machine according to claim 1 is characterized in that: described reader/writer module and described antenna are separately positioned on two faces of described antenna-reflected plate, and described suction wave apparatus is close to described reader/writer module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620054982 CN2872476Y (en) | 2006-02-16 | 2006-02-16 | Manual passive radio-frequency label reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620054982 CN2872476Y (en) | 2006-02-16 | 2006-02-16 | Manual passive radio-frequency label reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872476Y true CN2872476Y (en) | 2007-02-21 |
Family
ID=37740819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620054982 Expired - Fee Related CN2872476Y (en) | 2006-02-16 | 2006-02-16 | Manual passive radio-frequency label reader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2872476Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222244A (en) * | 2011-05-20 | 2011-10-19 | 海能达通信股份有限公司 | Anti-counterfeiting verification method of fitting, configuration method thereof and wireless communication equipment |
| CN103647592A (en) * | 2013-12-30 | 2014-03-19 | 上海和为科技有限公司 | Signal sending method, signal receiving method and equipment |
| CN103646261A (en) * | 2013-11-30 | 2014-03-19 | 四川久远新方向智能科技有限公司 | Intelligent traffic radio frequency card automatic reading and inquiring system |
| CN106709388A (en) * | 2015-11-13 | 2017-05-24 | 航天信息股份有限公司 | Reader-writer power calibration device and calibration method |
| CN109900751A (en) * | 2019-02-27 | 2019-06-18 | 北京航空航天大学 | A kind of portable capacitance chromatography imaging measuring device |
| CN111814506A (en) * | 2020-07-16 | 2020-10-23 | 昆明物理研究所 | Non-contact automatic read-write system for identity information of dangerous chemicals |
| CN112244993A (en) * | 2020-10-31 | 2021-01-22 | 杭州诺生医疗科技有限公司 | Radio frequency ablation instrument |
-
2006
- 2006-02-16 CN CN 200620054982 patent/CN2872476Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222244A (en) * | 2011-05-20 | 2011-10-19 | 海能达通信股份有限公司 | Anti-counterfeiting verification method of fitting, configuration method thereof and wireless communication equipment |
| CN103646261A (en) * | 2013-11-30 | 2014-03-19 | 四川久远新方向智能科技有限公司 | Intelligent traffic radio frequency card automatic reading and inquiring system |
| CN103646261B (en) * | 2013-11-30 | 2017-08-18 | 四川久远新方向智能科技有限公司 | Intelligent traffic radio frequency card reads inquiry system automatically |
| CN103647592A (en) * | 2013-12-30 | 2014-03-19 | 上海和为科技有限公司 | Signal sending method, signal receiving method and equipment |
| CN103647592B (en) * | 2013-12-30 | 2017-03-08 | 上海和为科技有限公司 | A kind of signal acceptance method and equipment |
| CN106709388A (en) * | 2015-11-13 | 2017-05-24 | 航天信息股份有限公司 | Reader-writer power calibration device and calibration method |
| CN109900751A (en) * | 2019-02-27 | 2019-06-18 | 北京航空航天大学 | A kind of portable capacitance chromatography imaging measuring device |
| CN109900751B (en) * | 2019-02-27 | 2020-12-04 | 北京航空航天大学 | Portable capacitance tomography measuring device |
| CN111814506A (en) * | 2020-07-16 | 2020-10-23 | 昆明物理研究所 | Non-contact automatic read-write system for identity information of dangerous chemicals |
| CN111814506B (en) * | 2020-07-16 | 2024-03-26 | 昆明物理研究所 | Non-contact automatic read-write system for identity information of dangerous chemicals |
| CN112244993A (en) * | 2020-10-31 | 2021-01-22 | 杭州诺生医疗科技有限公司 | Radio frequency ablation instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2872476Y (en) | Manual passive radio-frequency label reader | |
| CN201993807U (en) | Vehicle management system based on RFID (radio frequency identification devices) | |
| CN101609138B (en) | Cargo tracking and monitoring system | |
| CN2904118Y (en) | High-speed remote-passive RF tag reader-writer | |
| CN101256681B (en) | Highway electric non-stop toll device | |
| CN103020799A (en) | Method and system for good transportation based on radio frequency identification device (RFID) | |
| CN101038631A (en) | Embedded RFID card identification portable device and identification method | |
| CN206489597U (en) | A kind of production process tracking system | |
| CN101236594A (en) | Rapid response long distance recognition radio frequency label | |
| CN101216876A (en) | A transport monitoring system and method on sensing radio frequency identification and general packet wireless service | |
| CN103729895A (en) | Method, device and system for awakening electronic tag | |
| CN112134638B (en) | Synchronous deployment system and method for Internet of things and emergency broadcast | |
| CN103577775A (en) | Method for searching for and identifying personal articles through mobile phone | |
| CN201341134Y (en) | Vehicle radio frequency identification wireless base station and radio frequency communication system | |
| CN2904117Y (en) | Integrated passive RF tag reader-writer | |
| CN2549541Y (en) | Electronic running vehicle tolling device with two electronic labels plus CPU card with double inter faces | |
| CN201845377U (en) | Traffic intelligent card identification system | |
| CN103761493A (en) | Portable wireless radio card reader | |
| CN206133594U (en) | Take RFID label of BLE function | |
| CN108182372A (en) | A kind of active RFID record card device based on bluetooth | |
| CN208367714U (en) | A kind of sorting system for logistics transportation | |
| CN201017338Y (en) | Active integrated sealing electronic label | |
| CN218122665U (en) | JJC catenary operation vehicle material video management system adopting RFID technology | |
| CN212305371U (en) | 4G remote industrial communication gateway | |
| CN202711315U (en) | Fast inspection system for inspecting cargo in container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XIANSHI SCIENCE CO., LTD., SHENZHEN CITY ADDRESS Free format text: FORMER NAME OR ADDRESS: SINCERE TECHNOLOGY CO., LTD., SHENZHEN CITY ADDRESS |
|
| CP03 | Change of name, title or address |
Address after: Building 3, building D, Tianji building, Tian Tian Digital City, Guangdong, Shenzhen, Futian District 518040, China Patentee after: Shenzhen Sense Technology Co., Ltd. Address before: Building 3, building D, Tianji building, Tian Tian Digital City, Guangdong, Shenzhen, Futian District 518040, China Patentee before: Sense Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: XIANSHI SCIENCE CO., LTD., SHENZHEN CITY Free format text: FORMER NAME: SINCERE TECHNOLOGY CO., LTD., SHENZHEN CITY |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070221 Termination date: 20140216 |