CN101964074A - Radio-frequency electronic identifier and radio-frequency identification system and realization method thereof - Google Patents
Radio-frequency electronic identifier and radio-frequency identification system and realization method thereof Download PDFInfo
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Abstract
The invention discloses a radio-frequency electronic identifier and a radio-frequency identification system and a realization method thereof. The radio-frequency electronic identifier comprises antennas, an analog circuit, a logic control circuit and a memory, wherein, the analog circuit comprises a frequency band selection circuit. In the invention, a wider working frequency band is divided into a plurality of working sub-frequency bands by the band selection circuit, so as to lead the radio-frequency electronic identifier of the invention to operate in a narrower working sub-frequency band, thus improving the radio-frequency input quality factor and the read-write sensitivity of the radio-frequency electronic identifier; the temporary frequency hopping or the fixed frequency hopping are performed through a read-write control electronic identifier, so as to improve the information safety of the electronic identifier, or satisfy the regional wireless spectrum legal provisions.
Description
Technical field
The invention belongs to field of radio frequency integrated circuits, relate to a kind of less radio-frequency electronic mark, radio frequency identification system and its implementation, be specially less radio-frequency electronic mark, radio frequency identification system and its implementation of a kind of ultrahigh frequency or 2.4G frequency range.
Background technology
RFID is a REID, and it is a kind of contactless automatic identification technology, and its ultimate principle is to utilize radiofrequency signal and space coupling and transport property, realizes the automatic identification to static or mobile object.Radio-frequency recognition system generally partly is made up of electronic mark, read write line, antenna and main frame etc., the data message of storage destination object in the electronic mark.During system works, read write line is by the radio frequency interface radiated electromagnetic wave, enter the read-write scope of read write line when electronic mark after, receive the radiofrequency signal of read write line, it (is Passive Tag that the energy that relies on induction to be obtained sends out the product information that is stored in the chip, passive marker or passive sign), the signal that perhaps initiatively sends a certain frequency (is Active Tag, active sign or active sign), read write line receives, after reading information and decoding, deliver to CIS and carry out the related data processing, realization is read the noncontact to electronic mark, reach automatic recognition objective object and obtain the purpose of related data, reading while write device can also carry out write operation to electronic mark under the control of main frame, rewrites the information that is stored in the sign.In general, according to employed electromagnetic wave frequency range, the RFID technology is divided into low frequency (LF), high frequency (HF), ultrahigh frequency (UHF) three classes.Wherein super high frequency technique has advantages such as decipherment distance is far away, recognition speed fast, can discern high-speed moving target, data capacity is big, is more suitable for the application in following logistics and supply chain field.
For super high frequency technique, present international standard ISO18000-6C has stipulated the working frequency range of 860-960MHz, ISO18000-4 has stipulated the working frequency range of 2.45GHz, and countries in the world have been formulated the permission working frequency range of country separately respectively, general each frequency range 4～20MHz width does not wait, and is used as UHF RFID as China regulation 840-845MHz and 920-925MHz frequency range.Because electronic mark will adapt to the working frequency range in the whole world, therefore the realization of all electronic mark chips at present all is that the wideband section covers, as ultrahigh frequency frequency range 860-960MHz, covering reaches nearly 100 megahertzes, the quality factor that this means electronic mark chip radio frequency input circuit are low to moderate about 10, selectivity ratios is relatively poor, such situation will cause the read-write sensitivity of electronic mark chip and reading/writing distance to be subjected to certain restriction not reaching optimal situation, in addition, because the frequency of operation of read write line and electronic mark is in same frequency range all the time, there is certain hidden danger in information security.
In sum, the UHF electronic of prior art sign exists quality factor low and read-write sensitivity that causes thus and the problem that reading/writing distance is relatively poor, there is hidden danger in information security as can be known, therefore, be necessary to propose improved technological means in fact, solve this problem.
Summary of the invention
For overcoming signal-selectivity and the Information Security problem that above-mentioned prior art exists, one object of the present invention is to provide a kind of less radio-frequency electronic mark, radio frequency identification system and its implementation, it is by definition work frequency sub-band, make the less radio-frequency electronic mark work in narrower work frequency sub-band, the radio frequency import prime factor and the read-write sensitivity of less radio-frequency electronic mark have been improved, make the less radio-frequency electronic mark that the read write line response that is operated in another work frequency sub-band is weakened simultaneously, improved reading/writing distance.
Another object of the present invention is to provide a kind of less radio-frequency electronic mark, radio frequency identification system and its implementation, it carries out interim redirect or fixedly redirect by read write line control less radio-frequency electronic mark, make other read write lines can not grasp the information and the state of less radio-frequency electronic mark comprehensively, improve the Information Security of less radio-frequency electronic mark.
For reaching above-mentioned and other purpose, the present invention has realized a kind of less radio-frequency electronic mark, comprises antenna, mimic channel, logic control circuit and storer, and wherein, this mimic channel further comprises:
Matching network, be connected in this antenna, be used for the impedance of this antenna and the input impedance of this less radio-frequency electronic mark chip are mated, so that follow-up rectification circuit can be effectively the part radio-frequency (RF) energy of this antenna induction is converted to the DC voltage of using for other parts, make demodulator circuit obtain the signal of enough energy simultaneously so that correct demodulation;
The Frequency Band Selection circuit, be connected between this matching network and rectification circuit, modulation circuit and the demodulator circuit, be used for a working frequency range is divided into a plurality of work frequency sub-band, the work at present frequency sub-band of this less radio-frequency electronic mark is selected to set according to the read write line signal that this less radio-frequency electronic mark receives by this logic control circuit, when this less radio-frequency electronic mark initially powers on, can call the default work frequency sub-band of this less radio-frequency electronic mark that is stored in the storer automatically;
Rectification circuit is used for the radio-frequency (RF) energy of this antenna induction is converted into other parts uses that DC voltage offers this less radio-frequency electronic mark;
Demodulator circuit, input end are connected in this matching network, receiving the radio-frequency pulse that this antenna receives by this matching network, and therefrom demodulate instruction and data, deliver to this logic control circuit and carry out subsequent treatment;
Modulation circuit, input end are connected to this logic control circuit, the instruction and data of this logic control circuit generation is modulated the back go out by this antenna transmission;
Electrify restoration circuit is connected in this logic control circuit, is used to produce reset signal; And
Clock generation circuit is connected in this electrify restoration circuit and this logic control circuit, for this electrify restoration circuit and this logic control circuit provide clock signal.
Further, mimic channel of the present invention also comprises a mu balanced circuit, its input end is connected in the output terminal of this rectification circuit, and output terminal is connected with this modulation circuit, this demodulator circuit and this logic control circuit, thinks that this less radio-frequency electronic mark provides stable operating voltage.
Wherein, this working frequency range is 840MHz-960MHz.
Wherein, this working frequency range is 2.45GHz-2.485GHz.
Wherein, this Frequency Band Selection circuit is divided into 4 work frequency sub-band with this working frequency range.
Wherein, the bandwidth of each work frequency sub-band is 20MHz-30MHz.
For reaching above-mentioned and other purpose, the present invention has also realized a kind of radio frequency identification system, it comprises an above-mentioned less radio-frequency electronic mark and a read write line, it is characterized in that, this less radio-frequency electronic mark is divided into a plurality of work frequency sub-band by a Frequency Band Selection circuit with a working frequency range, and the default work frequency sub-band of this less radio-frequency electronic mark is arranged in the storer of this less radio-frequency electronic mark, when this read write line reads this less radio-frequency electronic mark, send on the frequency near the centre of the work of each in wireless frequency spectrum specialized range frequency sub-band successively earlier continuous carrier to this less radio-frequency electronic mark so that electric flux on it to be provided, if have only one section effective wireless frequency, the two ends that the read write line working frequency range can be set are respectively as two work frequency sub-band.Automatically from storer, transfer default work frequency sub-band after this less radio-frequency electronic mark powers on then parameter is set, and the work frequency sub-band of this sign is set.
For reaching above-mentioned and other purpose, the present invention also provides the implementation method of a kind of radio frequency identification system, and it comprises the steps:
Define the work frequency sub-band of this less radio-frequency electronic mark, a working frequency range is divided into a plurality of these work frequency sub-band, and the setting of the default work frequency sub-band of this less radio-frequency electronic mark is stored in the storer of this less radio-frequency electronic mark;
When this read write line will read this less radio-frequency electronic mark, near each work frequency sub-band is middle, send continuous carrier to this less radio-frequency electronic mark, so that this less radio-frequency electronic mark is charged on the frequency at first successively;
After this less radio-frequency electronic mark powers on, read this default work frequency sub-band of setting in this storer, and the work at present frequency sub-band is set to this default work frequency sub-band; Read while write the device frequency sub-band of will working and be set at corresponding work frequency sub-band.
Further, when this read write line is not known the default work frequency sub-band of this less radio-frequency electronic mark or need to be forced the less radio-frequency electronic mark to be operated in other work frequency sub-band, can after a plurality of different frequency continuous carriers of emission, closely follow an interim frequency sub-band select command that comprises interim frequency sub-band parameter; This less radio-frequency electronic mark is set to the odd-job frequency sub-band that this interim frequency sub-band parameter is determined according to this interim frequency sub-band select command work at present frequency sub-band, and returning an interim setting check signal, this interim setting check signal can not return under many tag environment.
Further, this method also comprises the steps:
This read write line can send to this less radio-frequency electronic mark and comprise the fixedly stator Frequency Band Selection order of setup parameter;
This less radio-frequency electronic mark is after receiving this stator Frequency Band Selection order, according to this fixedly setup parameter revise default work frequency sub-band in this storer, and return fixedly setting check signal to this read write line, this fixedly the setting check signal under many tag environment, can not return.
Further, this method comprises the steps: that also this read write line sends this interim frequency sub-band select command to this less radio-frequency electronic mark continuously, to realize the continuous redirect of work frequency sub-band.
Wherein, frequency is near the frequency center of each work frequency sub-band near this centre, if having only one section effective wireless frequency, the two ends that the read write line working frequency range can be set power on for this less radio-frequency electronic mark as the frequency of emission continuous carrier respectively.
Wherein, each work frequency sub-band centre frequency carrier wave sends and is not less than 200us.
Compared with prior art, a kind of electronic mark of the present invention, radio frequency identification system and implementation method, its radio circuit in electronic mark partly is provided with the Frequency Band Selection circuit, by the Frequency Band Selection circuit work frequency sub-band is defined and selects, make that electronic mark of the present invention can be a narrower work frequency sub-band job, solved prior art because electronic mark wideband end covers the low problem of quality factor that produces, through experiment, the radio frequency import prime factor of electronic mark of the present invention can be brought up to 25-40 by original about 10, improved selectivity greatly, and the electronic mark that makes improves to a certain extent in the sensitivity meeting of a certain work frequency sub-band, and weaken greatly for the response of the read write line that is operated in another work frequency sub-band simultaneously, improved security; In addition, implementation method of the present invention also by interim frequency hopping and fixing frequency hopping, makes other read write lines can not comprehensively grasp the information and the state of sign, has improved the Information Security of electronic mark, has reached the purpose of information security.
Description of drawings
Fig. 1 is the circuit structure diagram of a kind of preferred embodiment of less radio-frequency electronic mark of the present invention;
Fig. 2 comprises the system architecture diagram of the radio frequency identification system of less radio-frequency electronic mark among Fig. 1 for the present invention;
Fig. 3 is the implementation method process flow diagram of a kind of radio frequency identification of the present invention system.
Embodiment
Below by specific instantiation and accompanying drawings embodiments of the present invention, those skilled in the art can understand other advantage of the present invention and effect easily by the content that this instructions disclosed.The present invention also can be implemented or be used by other different instantiation, and the every details in this instructions also can be based on different viewpoints and application, carries out various modifications and change under the spirit of the present invention not deviating from.
Fig. 1 is the schematic diagram of a kind of preferred embodiment of less radio-frequency electronic mark of the present invention.As shown in Figure 1, a kind of less radio-frequency electronic mark 100 of the present invention comprises mimic channel 101, antenna 102, logic control circuit 103 and storer 104.
Mimic channel 101 is responsible for sending command signal and the reflection answer signal between modulation, receiving demodulation less radio-frequency electronic mark 100 and the read write line (not shown), and it further comprises: matching network 1011, Frequency Band Selection circuit 1012, rectification circuit 1013, mu balanced circuit 1014, demodulator circuit 1015, modulation circuit 1016, electrify restoration circuit 1017 and clock generation circuit 1018.Matching network 1011 is used for the input impedance of the impedance of antenna 102 and rectification circuit 1013 is mated, so that the part radio-frequency (RF) energy that rectification circuit 1013 can effectively be responded to antenna 102 transforms and for the dc energy (DC voltage) that back level module is used, guarantee that simultaneously demodulator circuit can obtain enough energy of correct restituted signal; Frequency Band Selection circuit 1012, be connected between matching network 1011 and the rectification circuit 1013, and be connected in logic control circuit 103 and storer 104, be used for a broad working frequency range is divided into a plurality of work frequency sub-band, the bandwidth of each work frequency sub-band is advisable with 20MHz-30MHz, and will the work set information of frequency sub-band of Frequency Band Selection circuit 1012 is stored in the storer 104, select to set by 103 pairs of work of logic control circuit frequency sub-band, in preferred embodiment of the present invention, with 30MHz is a sub-bin width, ultrahigh frequency frequency range (840-960MHz) is divided into 4 work frequency sub-band, promptly 840～870MHz is the first work frequency sub-band, 870～900MHz is the second work frequency sub-band, 900～930MHz is the 3rd work frequency sub-band, 930～960MHz is the 4th work frequency sub-band, and the setting of the frequency sub-band of will working is stored in the storer 104 of less radio-frequency electronic mark 100, so that less radio-frequency electronic mark 100 reads and sets on request the work frequency sub-band when powering on, resonance band with control antenna 102, can decide on design requirement as for the quantity of cutting apart the work frequency sub-band, the present invention is not as limit; Rectification circuit 1013 is used for the part radio-frequency (RF) energy of antenna 102 inductions is converted into the dc energy (DC voltage) that back each module of level is used; Mu balanced circuit 1014 is optional circuit, its input end is connected in the output terminal of rectification circuit 1013, output terminal respectively with demodulator circuit 1015, modulation circuit 1016 and logic control circuit 103 link to each other, the dc voltage stability that is used for rectification circuit 1013 is exported is in the particular level scope, for less radio-frequency electronic mark 100 provides stable operating voltage, preferable, in the preferred embodiment of the present invention, this mu balanced circuit also can be different from traditional mu balanced circuit, herein mu balanced circuit 1014 also can only limit high pressure and do not have voltage drop to be beneficial to the less radio-frequency electronic mark to low pressure can be in extremely low-yield down work, the present invention is not as limit; Its demodulator circuit 1015, its input end is connected in matching network 1011, be used for demodulating instruction and data from the radio-frequency pulse that antenna 102 receives, and deliver to logic control circuit 103 and handle, demodulator circuit 1015 adopts simple demodulation method such as envelope detection mode or FSK usually; Modulation circuit 1016 input ends are connected to logic control circuit 103, impedance by control less radio-frequency electronic mark 100 radio frequency interfaces, thereby the reflection coefficient that changes at antenna 102 interfaces comes the data-signal that logic control circuit 103 produces is modulated, and feeds back to read write line by antenna 102; Electrify restoration circuit 1017, be connected in logic control circuit 103, herein, electrify restoration circuit has two main effects: the one, work as the effective coverage that less radio-frequency electronic mark 100 enters read write line, when supply voltage has reached the operate as normal current potential, producing the reset signal of entire chip, secondly is when supply voltage reduces suddenly, and this circuit can prevent that by resetting capability error from appearring in logical circuit; And clock generation circuit 1018, for example adopt ring oscillator circuit, for electrify restoration circuit 1017 and logic control circuit 103 provide clock signal.
Antenna 102, be used for and reading and writing device antenna between obtain radio-frequency (RF) energy by electromagnetic field couples; Logic control circuit 103 is used to control the flow direction of less radio-frequency electronic mark 100 internal datas, carry out state exchange, store and return needed content according to the instruction control less radio-frequency electronic mark 100 that receives, comprise functions such as command analysis, digital coding, data storage, read/write; Storer 104 is used for data storage, and preferred, storer 104 is generally scratch pad memory (EEPROM) or single writable memory (OTP), and the default work frequency sub-band of less radio-frequency electronic mark 100 then is arranged in the storer 104.
Fig. 2 is the structural drawing of a kind of preferred embodiment of a kind of radio frequency identification of the present invention system.As shown in Figure 2, a kind of radio frequency identification of the present invention system, comprise read write line 200 and less radio-frequency electronic mark 100 shown in Figure 1, wherein, less radio-frequency electronic mark 100 is divided into a plurality of work frequency sub-band by the Frequency Band Selection circuit with a broad working frequency range, this broad working frequency range can be the ultrahigh frequency frequency range, as 840MHz-960MHz, the present invention is not as limit, and the default work frequency sub-band of this less radio-frequency electronic mark 100 is arranged in the storer of less radio-frequency electronic mark 100, when read write line 200 need read the less radio-frequency electronic mark, read write line 200 on the intermediate frequency of each work frequency sub-band, send at first successively continuous carrier to less radio-frequency electronic mark 100 so that less radio-frequency electronic mark 100 power on, then from storer, read the information of default work frequency sub-band and it is provided with the work at present frequency sub-band of this less radio-frequency electronic mark 100 by less radio-frequency electronic mark 100, simultaneously, read write line 200 self also is provided with its corresponding work frequency sub-band, and promptly the work at present frequency range of read write line 200 also is set to the default work frequency sub-band of less radio-frequency electronic mark 100.In addition, read write line 200 is Iterim Change or the fixing default work frequency sub-band that changes less radio-frequency electronic mark 100 according to circumstances, and less radio-frequency electronic mark 100 will give feedback acknowledgment.
Fig. 3 is the process flow diagram of first preferred embodiment of radio frequency identification of the present invention system implementation method, please also refer to Fig. 3 and Fig. 2, the implementation method of a kind of radio frequency identification of the present invention system is applied in the radio frequency identification system of Fig. 2, and concrete steps are as follows:
Certainly, because some specific needs, will be for a long time in being another range of countries of non-default work frequency sub-band, uses the permission working frequency range as less radio-frequency electronic mark 100, this just needs to change the default work frequency sub-band of less radio-frequency electronic mark 100, carry out the fixedly setting or the fixedly redirect of work frequency sub-band, second preferred embodiment of following radio frequency identification of the present invention system implementation method has then been realized this purpose.Be that with the first preferred embodiment of the invention difference second preferred embodiment of the invention also has subsequent step after step 206:
Certainly, for security needs, the present invention can also carry out the security that continuous redirect can strengthen electronic mark at the different operating frequency sub-band by making less radio-frequency electronic mark 100, specifically, can realize continuous redirect work frequency sub-band by the control of 200 pairs of electronic marks of read write line, promptly in certain time interval, repeat to send interim frequency sub-band select command,, be the frequency hopping mode of operation to realize the continuous redirect of work frequency sub-band to less radio-frequency electronic mark 100 by read write line.Wherein, the frequency of redirect can be adjusted as required; as in China; the frequency range of permission work has two, and one is 840-845MHz, and another is 920-925MHz; in order to increase the security of less radio-frequency electronic mark; can make the continuously redirect between these two frequency ranges of less radio-frequency electronic mark, because these two frequency ranges differ 80MHz, the redirect between the frequency range can be played the information safety protection effect.
Empirical tests, the present invention carries out definition of work frequency sub-band and frequency hopping agreement by above-mentioned Frequency Band Selection circuit, make the radio frequency import prime factor of less radio-frequency electronic mark chip of the present invention to bring up to 25-40 by original about 10, improved selectivity greatly, and because this sensitivity meeting in a certain work frequency sub-band of less radio-frequency electronic mark of the present invention improves to a certain extent, response for the read write line that is operated in another work frequency sub-band simultaneously then can weaken greatly, has improved the security of less radio-frequency electronic mark.In addition, the present invention makes other read write line can not comprehensively grasp the information and the state of electronic mark by the less radio-frequency electronic mark being carried out interim frequency hopping and the fixedly setting of frequency hopping, and the security that has improved electronic mark has reached the purpose of information security.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any those skilled in the art all can be under spirit of the present invention and category, and the foregoing description is modified and changed.Therefore, the scope of the present invention should be listed as claims.
Claims (10)
1. a less radio-frequency electronic mark comprises antenna, mimic channel, logic control circuit and storer, it is characterized in that, this mimic channel further comprises:
Matching network, be connected in this antenna, be used for the impedance of this antenna and the input impedance of this less radio-frequency electronic mark chip are mated, so that follow-up rectification circuit can be effectively the part radio-frequency (RF) energy of this antenna induction is converted to the DC voltage of using for other parts, make demodulator circuit obtain the signal of enough energy simultaneously so that correct demodulation;
The Frequency Band Selection circuit, be connected between this matching network and a rectification circuit, a modulation circuit and the demodulator circuit, be used for a working frequency range is divided into a plurality of work frequency sub-band, the work at present frequency sub-band of this less radio-frequency electronic mark is selected to set according to the read write line signal that this less radio-frequency electronic mark receives by this logic control circuit, when this less radio-frequency electronic mark initially powers on, can call the default work frequency sub-band of this less radio-frequency electronic mark that is stored in this storer automatically;
Rectification circuit is used for the radio-frequency (RF) energy of this antenna induction is converted into other parts uses that DC voltage offers this less radio-frequency electronic mark;
Demodulator circuit, input end are connected in this matching network, receiving the radio-frequency pulse that this antenna receives by this matching network, and therefrom demodulate instruction and data, deliver to this logic control circuit and carry out subsequent treatment;
Modulation circuit, input end are connected to this logic control circuit, the instruction and data of this logic control circuit generation is modulated the back go out by this antenna transmission;
Electrify restoration circuit is connected in this logic control circuit, is used to produce reset signal; And
Clock generation circuit is connected in this electrify restoration circuit and this logic control circuit, for this electrify restoration circuit and this logic control circuit provide clock signal.
2. less radio-frequency electronic mark as claimed in claim 1, it is characterized in that: this mimic channel also comprises a mu balanced circuit, its input end is connected in the output terminal of this rectification circuit, output terminal is connected with this modulation circuit, this demodulator circuit and this logic control circuit, for this less radio-frequency electronic mark provides stable operating voltage.
3. less radio-frequency electronic mark as claimed in claim 2 is characterized in that: this working frequency range is 840MHz-960MHz or 2.45GHz-2.485GHz.
4. less radio-frequency electronic mark as claimed in claim 3 is characterized in that: this Frequency Band Selection circuit is divided into 4 work frequency sub-band with this working frequency range, and the bandwidth of each work frequency sub-band is 20MHz-30MHz.
5. one kind comprises the radio frequency identification system of less radio-frequency electronic mark according to claim 1, comprise this a less radio-frequency electronic mark and a read write line, it is characterized in that, this less radio-frequency electronic mark is divided into a plurality of work frequency sub-band by a Frequency Band Selection circuit with a working frequency range, and the default work frequency sub-band of this less radio-frequency electronic mark is arranged in the storer of this less radio-frequency electronic mark, when this read write line reads this less radio-frequency electronic mark, sending continuous carrier to this less radio-frequency electronic mark on the arbitrary frequency in centre of the first work of each in the wireless frequency spectrum specialized range successively frequency sub-band powers on to guarantee this less radio-frequency electronic mark, this less radio-frequency electronic mark directly reads this default work frequency sub-band from this storer then, current work frequency sub-band is provided with, reads while write its work at present frequency range of device and be set to this default work frequency sub-band frequency range and be set at corresponding work frequency sub-band.
6. radio frequency identification system that comprises as less radio-frequency electronic mark as described in the claim 5, comprise this a less radio-frequency electronic mark and a read write line, it is characterized in that: if this working frequency range has only one section effective wireless frequency, the two ends that this read write line working frequency range then can be set power on for this less radio-frequency electronic mark as the frequency of two emission continuous carriers respectively.
7. the implementation method as radio frequency identification system as described in the claim 5 comprises the steps:
Define the work frequency sub-band of this less radio-frequency electronic mark, a working frequency range is divided into a plurality of these work frequency sub-band, and the setting of the default work frequency sub-band of this less radio-frequency electronic mark is stored in the storer of this less radio-frequency electronic mark;
When this read write line will read this less radio-frequency electronic mark and known this default work frequency sub-band, sending continuous carrier to this less radio-frequency electronic mark, so that this less radio-frequency electronic mark is charged on arbitrary frequency in the middle of each work frequency sub-band successively earlier;
After this less radio-frequency electronic mark powers on, read this default work frequency sub-band of setting in this storer, and the work at present frequency sub-band is set at this default work frequency sub-band, read while write device the work at present frequency range also is set at this default work frequency sub-band.
8. radio frequency identification as claimed in claim 7 system implementation method, it is characterized in that: when this read write line does not know that the default work frequency sub-band of this less radio-frequency electronic mark or needs force this less radio-frequency electronic mark to be operated in other work frequency sub-band, then after a plurality of different frequency continuous carriers of emission, closely follow an interim frequency sub-band select command that comprises interim frequency sub-band parameter; This less radio-frequency electronic mark is set to the odd-job frequency sub-band that this interim frequency sub-band parameter is determined according to this interim frequency sub-band select command work at present frequency sub-band, and returning an interim setting check signal, this interim setting check signal can not return under many tag environment.
9. radio frequency identification as claimed in claim 8 system implementation method is characterized in that this method also comprises the steps:
This read write line sends to this less radio-frequency electronic mark and comprises the fixedly stator Frequency Band Selection order of setup parameter;
This less radio-frequency electronic mark is after receiving this stator Frequency Band Selection order, according to this fixedly setup parameter revise default work frequency sub-band in this storer, and return fixedly setting check signal to this read write line, this fixedly the setting check signal under many tag environment, can not return.
10. radio frequency identification as claimed in claim 8 system implementation method, it is characterized in that, this method comprises the steps: that also this read write line can repeat to send this interim frequency sub-band select command to this less radio-frequency electronic mark in certain time interval, to realize the continuous redirect of work frequency sub-band, be the frequency hopping mode of operation.
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Cited By (12)
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| CN102156898A (en) * | 2011-04-07 | 2011-08-17 | 清华大学 | Chip with information identification and preparation method of chip |
| CN102222210A (en) * | 2011-06-23 | 2011-10-19 | 连云港杰瑞深软科技有限公司 | RFID (Radio Frequency Identification Device) communication device based on low-frequency trigger and communication method |
| CN102393897A (en) * | 2011-07-11 | 2012-03-28 | 上海沛宇信息科技有限公司 | Active RFID identification system and control method thereof for accurately reading boundary |
| CN102694421A (en) * | 2011-03-23 | 2012-09-26 | 三星电机株式会社 | Wireless power transmitter and wireless power transceiver |
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| CN102968659A (en) * | 2012-10-26 | 2013-03-13 | 上海中科高等研究院 | Radio frequency identification wireless and wired interactive communication method and radio frequency identification |
| CN102968659B (en) * | 2012-10-26 | 2015-06-10 | 中国科学院上海高等研究院 | Electronic lable wireless and wired interactive communication method and electronic label |
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| CN107947822A (en) * | 2016-10-13 | 2018-04-20 | 中兴通讯股份有限公司 | A kind of antenna-matching circuit, the system of selection of frequency range and device |
| CN108808245A (en) * | 2018-06-06 | 2018-11-13 | Oppo（重庆）智能科技有限公司 | Tuning switch processing method, device, storage medium and electronic equipment |
| CN108808245B (en) * | 2018-06-06 | 2020-12-22 | Oppo（重庆）智能科技有限公司 | Tuning switch processing method and device, storage medium and electronic equipment |
| CN113057641A (en) * | 2019-12-13 | 2021-07-02 | 深圳市凯沃尔电子有限公司 | Method for quickly reading data |
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