CN104809421A - Method and equipment for reading electronic tag - Google Patents
Method and equipment for reading electronic tag Download PDFInfo
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- CN104809421A CN104809421A CN201510257970.4A CN201510257970A CN104809421A CN 104809421 A CN104809421 A CN 104809421A CN 201510257970 A CN201510257970 A CN 201510257970A CN 104809421 A CN104809421 A CN 104809421A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
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Abstract
The invention discloses a method and equipment for reading an electronic tag. The method comprises the following steps that a reader-writer broadcasts a monitoring signal on a first channel according to a pre-set period; the reader-writer receives a first monitoring modulating signal returned back by the monitoring signal on the first channel; when the signal-to-noise ratio of the first channel is determined to be smaller than a first pre-set value according to the first monitoring modulating signal, the reader-writer broadcasts the monitoring signal on residual channels, except the first channel, in a transmission channel; when the signal-to-noise ratio of a second channel is determined to be greater than or equal to the first pre-set value according to a second monitoring modulating signal returned back by the monitoring signal on the second channel in the transmission channel, the reader-writer reads data of the electronic tag on the second channel. With the adoption of the method and the equipment for reading the electronic tag, the technical problem in the prior art that the accuracy of reading the electronic tag is lower, caused by the communication interference between the reader-writer and the electronic tag, is solved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and apparatus of reading electronic labels.
Background technology
RFID (Radio Frequency Identification, radio-frequency (RF) identification) technology, be commonly called as electronic tag, it is a kind of contactless automatic identification technology, it automatically identifies destination object by radiofrequency signal and obtains related data, identification work need not manual intervention, can work in various rugged surroundings.RFID technique identifiable design high-speed moving object also can identify multiple label simultaneously, swift and convenient to operate.RFID is a kind of simple wireless system, and this system at least should comprise following two parts, and one is read write line, and two is electronic tag (or claiming radio-frequency card, transponder etc.).
In prior art, electronic tag is after entering magnetic field, if receive the load instructions modulation signal that read write line sends, the electricity that just can induction current be relied on to obtain sends out storage data message in the chips, read write line read this data message and decoding after, deliver to CIS and carry out relevant data process, but, under extraneous strong electromagnetic environment, radio communication between read write line and electronic tag can be subject to strong interference, thus affect the reading of read write line to the data message of electronic tag, and then the accuracy causing electronic tag to read is lower.
Summary of the invention
Embodiments provide a kind of method and apparatus of reading electronic labels, at least to solve the lower technical matters of accuracy that the electronic tag that causes due to the Communication Jamming existed between read write line and electronic tag in prior art reads.
According to an aspect of the embodiment of the present invention, provide a kind of method of reading electronic labels, comprising: read write line is broadcasted on the first channel according to predetermined period and intercepted signal;
Described read write line receive on described first channel in response to described intercept that signal returns first intercept modulation signal;
According to described first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described first channel is less than the first preset value time, described read write line intercepts signal except on the residue channel of described first channel described in broadcast successively in transmission channel, wherein, described transmission channel is at least two channels divided according to preset strategy according to the working frequency range of described read write line;
According on the second channel in described transmission channel in response to described intercept that signal returns second intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described second channel is greater than or equal to described first preset value time, the data of described read write line reading electronic labels on described second channel.
Alternatively, signal is intercepted described in for the described electronic tag charging intercepting signal described in receiving;
The data that described read write line reads described electronic tag on described second channel comprise:
After described electronic tag completes charging, described read write line reads the data of described electronic tag on described second channel.
Alternatively, the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, described read write line intercepts the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the described 3rd;
When determining that the signal to noise ratio (S/N ratio) of described 3rd channel is greater than or equal to the second preset value, if described electronic tag completes charging, described read write line reads the information of described electronic tag on described 3rd channel, and wherein, described second preset value is less than described first preset value.
Alternatively, the data that described read write line reads described electronic tag comprise:
Described read write line broadcast load instructions modulation signal;
Described read write line receives the load-modulate signal that described electronic tag sends according to described load instructions modulation signal, wherein, described load-modulate signal is the modulation signal obtained after encrypt data is carried in described load instructions modulation signal by described electronic tag, and described encrypt data comprises the encrypt data that in the storage data field of described electronic tag, at least two sectors are corresponding;
Encrypt data corresponding to described read write line at least two sectors according to secret key decryption corresponding to described encrypt data obtains plaintext data corresponding at least two sectors;
When the plaintext data that described at least two sectors are corresponding is identical, described read write line is decoded described plaintext data.
Alternatively, described read write line comprises, antenna array module, and described antenna array module comprises at least two antennas, for receiving described load-modulate signal;
Described read write line receives the load-modulate signal that described electronic tag broadcasts according to described load instructions modulation signal and comprises:
Described read write line determines the receiving antenna receiving described load-modulate signal in described aerial array;
Described read write line disconnects antenna adjacent with described receiving antenna in described aerial array.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of read-write equipment, be applied to a kind of read write line, it is characterized in that, comprising:
First radio unit, intercepts signal for broadcasting on the first channel;
Receiving element, intercepts modulation signal for receiving on described first channel in response to intercept that signal returns first of described first radio unit broadcast;
Second radio unit, for intercept receive according to described receiving element described first modulation signal determine that the signal to noise ratio (S/N ratio) of described first channel is less than the first preset value time, signal is intercepted except on the residue channel of described first channel described in broadcast successively in transmission channel, wherein, described transmission channel is at least two channels divided according to preset strategy according to the working frequency range of described read write line;
Reading unit, for according on the second channel in described transmission channel in response to intercept that signal returns second of described second radio unit broadcast intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described second channel is greater than or equal to described first preset value time, the data of reading electronic labels on described second channel.
Alternatively, signal is intercepted described in for the electronic tag charging intercepting signal described in receiving;
Described reading unit is used for, and after described electronic tag completes charging, described second channel reads the data of described electronic tag.
Alternatively, also comprise:
Processing unit, for intercept the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) is intercepted according to the described 3rd, and the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, intercept the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the described 3rd;
Described reading unit also for, when described processing unit determines that the signal to noise ratio (S/N ratio) of described 3rd channel is greater than or equal to the second preset value, if described electronic tag completes charging, described 3rd channel reads the information of described electronic tag.Wherein, described second preset value is less than described first preset value.
Alternatively, described reading unit comprises:
Broadcast module, for broadcasting load instructions modulation signal;
Receiver module, for receiving the load-modulate signal that described electronic tag is broadcast according to the load instructions modulation signal that described broadcast module sends, wherein, described load-modulate signal is the modulation signal obtained after encrypt data is carried in described load instructions modulation signal by described electronic tag, and described encrypt data comprises the encrypt data that in the storage data field of described electronic tag, at least two sectors are corresponding;
Deciphering module, encrypt data corresponding at least two sectors described in the secret key decryption that the encrypt data for receiving according to described receiver module is corresponding obtains plaintext data corresponding at least two sectors;
Decoder module, when the plaintext data that at least two sectors that described deciphering module obtains are corresponding is identical, described plaintext data of decoding.
Alternatively, described reading unit also comprises:
Antenna array module, comprises at least two antennas, for receiving described load-modulate signal;
Antenna control module, determines the receiving antenna receiving described load-modulate signal, and disconnects antenna adjacent with described receiving antenna in described aerial array in described aerial array.
In embodiments of the present invention, read write line is broadcasted on the first channel according to predetermined period and is intercepted signal, this read write line receive on this first channel intercept that signal returns in response to this first intercept modulation signal, according to this first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this first channel is less than the first preset value time, this read write line intercepts signal except the residue channel of this first channel broadcasts this successively in transmission channel, wherein, this transmission channel is at least two channels divided according to preset strategy according to the working frequency range of this read write line, according on the second channel in this transmission channel in response to this intercept that signal returns second intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this second channel is greater than or equal to this first preset value time, the data of this read write line reading electronic labels on this second channel.Thus solve the lower problem of accuracy that the electronic tag that causes due to the Communication Jamming existed between read write line and electronic tag in prior art reads.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of schematic flow sheet reading and writing electronic tag of the embodiment of the present invention;
Fig. 2 is the structural representation of a kind of antenna controling circuit of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the another kind read-write electronic tag of the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of read-write equipment of the embodiment of the present invention;
Fig. 5 is the structural representation of the another kind of read-write equipment of the embodiment of the present invention;
Fig. 6 is the structural representation of the another kind of read-write equipment of the embodiment of the present invention;
Fig. 7 is the structural representation of the another kind of read-write equipment of the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
The embodiment of the present invention provides a kind of method of reading electronic labels, and as shown in Figure 1, the flow process of the method comprises:
S101, read write line are broadcasted on the first channel according to predetermined period and are intercepted signal;
S102, this read write line receive on this first channel intercept that signal returns in response to this first intercept modulation signal;
Wherein, read write line is broadcasted after this intercepts signal on the first channel, and this intercepts signal can be back to read write line when encountering object (as wall or ground etc.), then this read write line receive return first intercept modulation signal.
S103, according to this first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this first channel is less than the first preset value time, this read write line is broadcasted this on a second channel and is intercepted signal;
S104, according to this first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this first channel is less than the first preset value time, this read write line is broadcasted this intercept signal except on the residue channel of this first channel successively in transmission channel;
Wherein, this transmission channel is at least two channels divided according to preset strategy according to the working frequency range of this read write line.
In a kind of possible implementation of the present invention, in advance the working frequency range of this read write line can be divided at least two channels, such as, if the working frequency range of this read write line is 121KHz to 131KHz, 10 efficient channels can be divided according to this working frequency range, the width of each channel is 1KHz, read write line at random wherein channel according to predetermined period broadcast this intercept signal time, all the other channels are in standby silent status.
S105, according on the second channel in this transmission channel in response to this intercept that signal returns second intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this second channel is greater than or equal to this first preset value time, the data of this read write line reading electronic labels on this second channel.
Alternatively, this intercepts signal for charging to receiving this electronic tag of intercepting signal; After this electronic tag completes charging, this read write line reads the data of this electronic tag on this second channel.Like this, before the data of reading electronic labels, read write line utilized intercept signal for electronic tag charged, thus to avoid when reading the data of this electronic tag just to electronic tag charging, having saved the time of the data of reading electronic labels.
Wherein, above-mentioned predetermined period can be greater than or equal to the discharge and recharge time of electronic tag, like this, can keep the charging to electronic tag at any time.
Alternatively, the intercept according to this that whole channels that signal determines on this transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than this first preset value time, this read write line intercepts the 3rd minimum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the 3rd, when determining that the signal to noise ratio (S/N ratio) of the 3rd channel is greater than or equal to the second preset value, this read write line reads the information of this electronic tag on the 3rd channel.
Wherein, this second preset value is less than this first preset value.
It should be noted that, when signal to noise ratio (S/N ratio) is less than this first preset value, then represent that this channel exists interference, therefore, read write line other channels then successively in transmission channel continue broadcast, and this intercepts signal, until determine that the signal to noise ratio (S/N ratio) intercepting modulation signal returned is greater than or equal to this first preset value, then determines that the channel that this intercepts modulation signal corresponding does not exist interference, then read write line sets up wireless link with electronic tag on this channel, and reads the data of this electronic tag.
In addition, if read write line determines that the signal to noise ratio (S/N ratio) intercepting modulation signal that other channels in transmission channel return all is less than this first preset value, what then read write line returned from the whole channels in transmission channel intercepts the signal to noise ratio (S/N ratio) of modulation signal, select signal to noise ratio (S/N ratio) maximum channel, if this maximum signal to noise ratio (S/N ratio) is greater than or equal to the second preset value, after this electronic tag completes charging, this read write line reads the information of this electronic tag on the channel that this maximum signal to noise ratio (S/N ratio) is corresponding.
In sum, read write line is when there is not interference in modulation signal determination present channel according to intercepting of returning, then reading electronic labels on present channel, read write line according to return intercept on modulation signal determination present channel exist interference time, all the other channels then in the transmission channel divided broadcast this successively and intercepts signal, until according to one of them channel returns intercept modulation signal determine that this channel does not exist interference time, the then data of reading electronic labels on this channel, if all there is interference in the whole channels in transmission channel, then therefrom select the minimum channel of interference and be greater than or equal to this second preset value (although namely this channel exists interference in the signal to noise ratio (S/N ratio) that the channel that this interference is minimum is corresponding, but still normal data transmission can be carried out) time, the data of reading electronic labels on the channel that this interference is minimum.
Alternatively, the data that read write line reads this electronic tag can comprise following implementation: this read write line broadcast load instructions modulation signal, and receive the load-modulate signal that this electronic tag sends according to this load instructions modulation signal, wherein, this load-modulate signal is the modulation signal obtained after encrypt data is carried in this load instructions modulation signal by this electronic tag, the encrypt data that this read write line is corresponding according to these at least two sectors of secret key decryption that this encrypt data is corresponding obtains plaintext data corresponding at least two sectors, when the plaintext data that these at least two sectors are corresponding is identical, this read write line is decoded this plaintext data.
Wherein, this encrypt data comprises the encrypt data that in the storage data field of this electronic tag, at least two sectors are corresponding.
In a kind of possible implementation of the present invention, to be described the example that is encrypted as of two sectors, the storage area of electronic tag can be divided into 8 sectors, and be designated as 0 to sector, sector 7 respectively, wherein, sector 0 is configuration store region, sector 7 is key storage region, 1 to sector, sector 6 is data storage areas, wherein, use two group key K1 and K2 by AES (Advanced Encryption Standard to needing the data of write, Advanced Encryption Standard) cryptographic algorithm is encrypted and obtains two groups of encrypt datas, be designated as M1 and M2 respectively, wherein, K1 and M1 is corresponding, K2 and M2 is corresponding, and M1 is write sector 1, M2 writes sector 2, after electronic tag receives the load instructions modulation signal of read write line broadcast, load-modulate signal is obtained after encrypt data M1 and M2 being carried in this load instructions modulation signal, and be sent to read write line, this read write line deciphers M1 and M2 respectively according to K1 and K2, obtain plaintext data M11 and M22 that at least two sectors are corresponding, when M11 with M22 is identical, this read write line is decoded this plaintext data, when M11 with M22 is identical, this read write line abandons M11 and M22, and again receive the load-modulate signal of electronic tag transmission, here just illustrate, the present invention is not construed as limiting.
Like this, decipher two groups of encrypt datas simultaneously and add deciphering difficulty, improve the security of data, in addition, the object of verification is mutually played by the deciphering of two groups of ciphertexts, when there is error code phenomenon in transmitting procedure, the mistake of plaintext data may be caused, by mutual verification, thus avoid the electronic tag data introducing mistake, improve the safety and reliability of electronic tag data.
Alternatively, this read write line comprises, antenna array module, and this antenna array module comprises at least two antennas, for receiving this load-modulate signal;
This read write line determines the receiving antenna receiving this load-modulate signal in this aerial array, and disconnects antenna adjacent with this receiving antenna in this aerial array.
Like this, when read write line transmits data by receiving antenna and electronic tag, by disconnecting the antenna adjacent with this receiving antenna, thus preventing from identifying blind area because mutual inductance phenomenon is formed between adjacent antenna, avoiding the electronic tag signal that None-identified read write line sends in this blind area.
In a kind of possible implementation of the present invention, as shown in Figure 2, each antenna in aerial array can adopt antenna controling circuit as shown in Figure 2 to control, circuit shown in Fig. 2 comprises power amplification circuit, control circuit and decoding circuit, this power amplification circuit is for amplifying the load-modulate signal of reception, this decoding circuit is used for the decoding data to electronic tag, control circuit is for controlling the closed and conducting of power amplification circuit and decoding circuit, wherein, triode T2 and T3 composition pushes away exempts from circuit, and form power amplification circuit with resistance R1 and resistance R2 and resistance R3, decoding circuit is made up of chip LM358, this decoding circuit is connected with one end of the pin 1 of the connectivity port AN of aerial coil, control circuit is then by tongue tube P0, triode T1 and resistance R11 and resistance R12 is formed, resistance R11 one end is connected with CTL circuit, one end is connected with one end of resistance R12 with the base stage of triode T1 respectively, the other end of resistance R12 and the grounded emitter of triode T1, the collector of triode T1 is connected with the positive pole of diode D2 and the pin 3 of tongue tube P0 respectively, the negative pole of diode D2 is connected with the pin 2 of voltage and tongue tube P0 respectively, the pin 1 of tongue tube P0 is connected with power amplification circuit, the pin 4 of tongue tube P0 is connected with one end of the pin 2 of the connectivity port AN of aerial coil, the pin 1 of the connectivity port AN of this aerial coil is connected with aerial coil with the other end of pin 2, when the pin 1 and pin 4 couples of tongue tube P0 that pass through tongue tube P0 apply high level, then this clarinet P0 conducting, thus make the wire loop conducting of antenna, when the pin 1 and pin 4 couples of tongue tube P0 that pass through tongue tube P0 apply low level, then this clarinet P0 disconnects, thus the wire loop of this antenna is disconnected, therefore, when receiving circuit works, then by the antenna controling circuit of this receiving circuit adjacent antenna, the wire loop of this antenna is disconnected, like this, when an Antenna Operation, avoid the mutual inductance phenomenon of other antennas to the antenna of this work.
It should be noted that; the antenna controling circuit of foregoing description is a kind of possible embodiment of the present invention; the present invention is to above-mentioned embodiment and be not construed as limiting, and other can realize also should falling within the scope of protection of the present invention the embodiment of the control of antenna safety return circuit.
The embodiment of the present invention provides the method for another kind of reading electronic labels, and as shown in Figure 2, the flow process of the method comprises:
On the first channel that S301, read write line are selected in the transmission channel of division according to predetermined period, signal is intercepted in broadcast.
In a kind of possible implementation of the present invention, in advance the working frequency range of this read write line can be divided at least two channels, such as, if the working frequency range of this read write line is 121KHz to 131KHz, 10 efficient channels can be divided according to this working frequency range, the width of each channel is 1KHz, read write line at random wherein channel according to predetermined period broadcast this intercept signal time, all the other channels are in standby silent status.
S302, read write line receive intercept that signal returns in response to this first intercept modulation signal.
Wherein, read write line is broadcasted after this intercepts signal on present channel, and this intercepts signal can be back to read write line when encountering object (as wall or ground etc.), then this read write line receive return first intercept modulation signal.
S303, read write line are intercepted modulation signal according to first and are determined whether the signal to noise ratio (S/N ratio) of this first channel is less than the first preset value;
When determining to be less than the first preset value, perform step S304 to step S306;
When determining to be greater than or equal to the first preset value, perform step S310 to step S311.
S304, this read write line are broadcasted this intercept signal according on the second channel of predetermined period in the transmission channel divided.
S305, this read write line receive on this second channel intercept that signal returns in response to this second intercept modulation signal.
S306, read write line are intercepted modulation signal according to second and are determined whether the signal to noise ratio (S/N ratio) of this second channel is less than the first preset value.
When determining to be less than the first preset value, perform step S307 to step S309;
When determining to be greater than or equal to the first preset value, perform step S310 to step S311.
S307, read write line continue in transmission channel, to intercept signal except the residue channel of this second channel broadcasts this successively.
S308, read write line the intercept according to this that whole channels that signal determines on this transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than this first preset value time, intercept the 3rd minimum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the 3rd.
S309, when determining that the signal to noise ratio (S/N ratio) of the 3rd channel is greater than or equal to the second preset value, this read write line sets up wireless link with this electronic tag on the 3rd channel, and by this wireless link broadcast load instructions modulation signal, and receive the load-modulate signal that this electronic tag sends according to this load instructions modulation signal.
Wherein, the second preset value is less than the first preset value.
S310, read write line set up wireless link on present channel, and by this wireless link broadcast load instructions modulation signal, and receive the load-modulate signal that this electronic tag sends according to this load instructions modulation signal.
Wherein, this load-modulate signal is the modulation signal obtained after encrypt data is carried in this load instructions modulation signal by this electronic tag.
S311, read write line are after the load-modulate signal receiving electronic tag transmission, the encrypt data corresponding according to these at least two sectors of secret key decryption that the encrypt data in this load-modulate signal is corresponding obtains plaintext data corresponding at least two sectors, and when these at least two plaintext data are identical, the data read that present channel is decoded.
Wherein, this encrypt data comprises the encrypt data that in the storage data field of this electronic tag, at least two sectors are corresponding.
Like this, decipher two groups of encrypt datas simultaneously and add encryption difficulty, improve the security of data, in addition, the object of verification is mutually played by the deciphering of two groups of ciphertexts, when there is error code phenomenon in transmitting procedure, the mistake of plaintext data may be caused, by mutual verification, thus avoid the electronic tag data introducing mistake, improve the safety and reliability of electronic tag data.
It should be noted that, signal is intercepted for receiving electronic tag charging that this intercepts signal in above-described embodiment, like this, before the data of reading electronic labels, read write line utilized intercept signal for electronic tag charged, thus to avoid when reading the data of this electronic tag just to electronic tag charging, save the time of the data of reading electronic labels.
In addition, this read write line comprises, antenna array unit, and this antenna array unit comprises at least two antennas, for receiving this load-modulate signal;
This read write line determines the receiving antenna receiving this load-modulate signal in this aerial array, and disconnects antenna adjacent with this receiving antenna in this aerial array.
Like this, when read write line transmits data by receiving antenna and electronic tag, by disconnecting the antenna adjacent with this receiving antenna, thus preventing from identifying blind area because mutual inductance phenomenon is formed between adjacent antenna, avoiding the electronic tag signal that None-identified read write line sends in this blind area.Its concrete description can with reference in above-described embodiment to the description of Fig. 2, repeated no more herein.
It should be noted that, for above-mentioned each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that can add required general hardware platform by software according to the method for above-described embodiment and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computing machine, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
Adopt above-described embodiment, read write line disturbs by selecting not exist or disturbs minimum channel and electronic tag to set up wireless link, and by the data of this wireless link reading electronic labels, thus solve the lower problem of accuracy that the electronic tag that causes due to the Communication Jamming existed between read write line and electronic tag in prior art reads.
The embodiment of the present invention provides a kind of read-write equipment 40, is applied to a kind of read write line, comprises:
First radio unit 41, intercepts signal for broadcasting on the first channel;
Receiving element 42, intercepts modulation signal for receiving on this first channel in response to intercept that signal returns first of this first radio unit 41 broadcast;
Second radio unit 43, for receive according to this receiving element this first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this first channel is less than the first preset value time, signal is intercepted except the residue channel of this first channel broadcasts this successively in transmission channel, wherein, this transmission channel is at least two channels divided according to preset strategy according to the working frequency range of this read write line;
Reading unit 44, for according on the second channel in this transmission channel in response to intercept that signal returns second of the broadcast of this second radio unit intercept modulation signal determine that the signal to noise ratio (S/N ratio) of this second channel is greater than or equal to this first preset value time, the data of reading electronic labels on this second channel.
Alternatively, this intercepts signal for charging to receiving this electronic tag of intercepting signal;
This reading unit 44 for, after this electronic tag completes charging, this read write line reads the data of this electronic tag on this second channel.
Alternatively, as shown in Figure 5, this fetch equipment 40 also comprises:
Processing unit 45, for intercept the intercept according to this that whole channels that signal determines on this transmission channel receive the 3rd signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than this first preset value time, the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) is intercepted according to the 3rd, and the intercept according to this that whole channels that signal determines on this transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than this first preset value time, intercept the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the 3rd;
This reading unit 44 also for, when this processing unit 45 determines that the signal to noise ratio (S/N ratio) of the 3rd channel is greater than or equal to the second preset value, the 3rd channel reads the information of this electronic tag.Wherein, this second preset value is less than this first preset value.
Alternatively, as shown in Figure 6, this reading unit 44 comprises:
Broadcast module 441, for broadcasting load instructions modulation signal;
Receiver module 442, for receiving the load-modulate signal that this electronic tag is broadcast according to the load instructions modulation signal that this broadcast module 451 sends, wherein, this load-modulate signal is the modulation signal obtained after encrypt data is carried in this load instructions modulation signal by this electronic tag, and this encrypt data comprises the encrypt data that in the storage data field of this electronic tag, at least two sectors are corresponding;
Deciphering module 443, encrypt data corresponding to these at least two sectors of secret key decryption that the encrypt data for receiving according to this receiver module 442 is corresponding obtains plaintext data corresponding at least two sectors;
Decoder module 444, when the plaintext data that at least two sectors that this deciphering module 443 obtains are corresponding is identical, this plaintext data of decoding.
Like this, decipher two groups of encrypt datas simultaneously and add encryption difficulty, improve the security of data, in addition, the object of verification is mutually played by the deciphering of two groups of ciphertexts, when there is error code phenomenon in transmitting procedure, the mistake of plaintext data may be caused, by mutual verification, thus avoid the electronic tag data introducing mistake, improve the safety and reliability of electronic tag data.
Alternatively, as shown in Figure 7, this reading unit 44 also comprises:
Antenna array module 445, comprises at least two antennas, for receiving this load-modulate signal;
Antenna control module 446, determines the receiving antenna receiving this load-modulate signal, and disconnects antenna adjacent with this receiving antenna in this aerial array in this aerial array.
Like this, when read write line transmits data by receiving antenna and electronic tag, by disconnecting the antenna adjacent with this receiving antenna, thus preventing from identifying blind area because mutual inductance phenomenon is formed between adjacent antenna, avoiding the electronic tag signal that None-identified read write line sends in this blind area.
It should be noted that, affiliated those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the fetch equipment of foregoing description and description, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
If the integrated unit in above-described embodiment using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in the storage medium that above computer can read.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in storage medium, comprises all or part of step of some instructions in order to make one or more computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a method for reading electronic labels, is characterized in that, comprising:
Read write line is broadcasted on the first channel according to predetermined period and is intercepted signal;
Described read write line receive on described first channel in response to described intercept that signal returns first intercept modulation signal;
According to described first intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described first channel is less than the first preset value time, described read write line intercepts signal except on the residue channel of described first channel described in broadcast successively in transmission channel, wherein, described transmission channel is at least two channels divided according to preset strategy according to the working frequency range of described read write line;
According on the second channel in described transmission channel in response to described intercept that signal returns second intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described second channel is greater than or equal to described first preset value time, the data of described read write line reading electronic labels on described second channel.
2. method according to claim 1, is characterized in that, described in intercept signal for the described electronic tag charging intercepting signal described in receiving;
The data that described read write line reads described electronic tag on described second channel comprise:
After described electronic tag completes charging, described read write line reads the data of described electronic tag on described second channel.
3. method according to claim 1 and 2, it is characterized in that, the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, described read write line intercepts the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the described 3rd;
When determining that the signal to noise ratio (S/N ratio) of described 3rd channel is greater than or equal to the second preset value, described read write line reads the information of described electronic tag on described 3rd channel, and wherein, described second preset value is less than described first preset value.
4. method according to claim 3, is characterized in that, the data that described read write line reads described electronic tag comprise:
Described read write line broadcast load instructions modulation signal;
Described read write line receives the load-modulate signal that described electronic tag sends according to described load instructions modulation signal, wherein, described load-modulate signal is the modulation signal obtained after encrypt data is carried in described load instructions modulation signal by described electronic tag, and described encrypt data comprises the encrypt data that in the storage data field of described electronic tag, at least two sectors are corresponding;
Encrypt data corresponding to described read write line at least two sectors according to secret key decryption corresponding to described encrypt data obtains plaintext data corresponding at least two sectors;
When the plaintext data that described at least two sectors are corresponding is identical, described read write line is decoded described plaintext data.
5. method according to claim 4, is characterized in that,
Described read write line comprises, antenna array module, and described antenna array module comprises at least two antennas, for receiving described load-modulate signal;
Described read write line receives the load-modulate signal that described electronic tag broadcasts according to described load instructions modulation signal and comprises:
Described read write line determines the receiving antenna receiving described load-modulate signal in described aerial array;
Described read write line disconnects antenna adjacent with described receiving antenna in described aerial array.
6. a read-write equipment, is applied to a kind of read write line, it is characterized in that, comprising:
First radio unit, intercepts signal for broadcasting on the first channel;
Receiving element, intercepts modulation signal for receiving on described first channel in response to intercept that signal returns first of described first radio unit broadcast;
Second radio unit, for intercept receive according to described receiving element described first modulation signal determine that the signal to noise ratio (S/N ratio) of described first channel is less than the first preset value time, signal is intercepted except on the residue channel of described first channel described in broadcast successively in transmission channel, wherein, described transmission channel is at least two channels divided according to preset strategy according to the working frequency range of described read write line;
Reading unit, for according on the second channel in described transmission channel in response to intercept that signal returns second of described second radio unit broadcast intercept modulation signal determine that the signal to noise ratio (S/N ratio) of described second channel is greater than or equal to described first preset value time, the data of reading electronic labels on described second channel.
7. read-write equipment according to claim 6, is characterized in that, described in intercept signal for the electronic tag charging intercepting signal described in receiving;
Described reading unit is used for, and after described electronic tag completes charging, described second channel reads the data of described electronic tag.
8. the equipment according to claim 6 or 7, is characterized in that, also comprises:
Processing unit, for intercept the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) is intercepted according to the described 3rd, and the intercept described in basis that whole channels that signal determines on described transmission channel receive the 3rd intercept signal to noise ratio (S/N ratio) corresponding to modulation signal be all less than described first preset value time, intercept the 3rd maximum channel of modulation signal determination signal to noise ratio (S/N ratio) according to the described 3rd;
Described reading unit also for, when described processing unit determines that the signal to noise ratio (S/N ratio) of described 3rd channel is greater than or equal to the second preset value, described 3rd channel reads the information of described electronic tag.Wherein, described second preset value is less than described first preset value.
9. equipment according to claim 8, is characterized in that, described reading unit comprises:
Broadcast module, for broadcasting load instructions modulation signal;
Receiver module, for receiving the load-modulate signal that described electronic tag is broadcast according to the load instructions modulation signal that described broadcast module sends, wherein, described load-modulate signal is the modulation signal obtained after encrypt data is carried in described load instructions modulation signal by described electronic tag, and described encrypt data comprises the encrypt data that in the storage data field of described electronic tag, at least two sectors are corresponding;
Deciphering module, encrypt data corresponding at least two sectors described in the secret key decryption that the encrypt data for receiving according to described receiver module is corresponding obtains plaintext data corresponding at least two sectors;
Decoder module, when the plaintext data that at least two sectors that described deciphering module obtains are corresponding is identical, described plaintext data of decoding.
10. equipment according to claim 9, is characterized in that, described reading unit also comprises:
Antenna array module, comprises at least two antennas, for receiving described load-modulate signal;
Antenna control module, determines the receiving antenna receiving described load-modulate signal, and disconnects antenna adjacent with described receiving antenna in described aerial array in described aerial array.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257970.4A CN104809421B (en) | 2015-05-19 | 2015-05-19 | The method and apparatus of reading electronic labels |
| PCT/CN2016/082463 WO2016184386A1 (en) | 2015-05-19 | 2016-05-18 | Method and device for reading electronic tag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510257970.4A CN104809421B (en) | 2015-05-19 | 2015-05-19 | The method and apparatus of reading electronic labels |
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| CN104809421B CN104809421B (en) | 2018-06-19 |
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| WO2016184386A1 (en) * | 2015-05-19 | 2016-11-24 | 沃科合众科技（北京）股份有限公司 | Method and device for reading electronic tag |
| CN111368569A (en) * | 2020-03-05 | 2020-07-03 | 广东识芯微电子科技有限公司 | Frequency division dual-channel RFID multi-tag identification method and system |
| WO2024037523A1 (en) * | 2022-08-19 | 2024-02-22 | 华为技术有限公司 | Positioning method and device |
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| WO2016184386A1 (en) * | 2015-05-19 | 2016-11-24 | 沃科合众科技（北京）股份有限公司 | Method and device for reading electronic tag |
| CN111368569A (en) * | 2020-03-05 | 2020-07-03 | 广东识芯微电子科技有限公司 | Frequency division dual-channel RFID multi-tag identification method and system |
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| WO2024037523A1 (en) * | 2022-08-19 | 2024-02-22 | 华为技术有限公司 | Positioning method and device |
Also Published As
| Publication number | Publication date |
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| CN104809421B (en) | 2018-06-19 |
| WO2016184386A1 (en) | 2016-11-24 |
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