CN105260690A - Method and system for identifying electronic label through multi-antenna RFID reader - Google Patents
Method and system for identifying electronic label through multi-antenna RFID reader Download PDFInfo
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Abstract
The invention relates to a method and system for identifying an electronic label through a multi-antenna RFID reader. The method comprises: receiving an identification command, and according to the antenna information in the identification command, indicating an antenna emission carrier wave corresponding to the antenna information to electrify the electronic label, wherein the antenna information includes the serial number information of antennas and the identification priority information of the antennas; identifying the electronic label through an air interface; and setting an inventory identity of the identified electronic label. Through The method and system for identifying an electronic label through a multi-antenna RFID reader can guarantee that the identified electronic label does not repeatedly respond to the identification command of the RFID reader by setting the inventory identity of the identified electronic label, and can solve the problem that the electronic label is identified repeatedly within the radio frequency region of each antenna. With the method, the identification efficiency of the RFID reader and the batch label identification capability can be improved while the identification and reading scope of the RFID reader can be enhanced and the coverage validity of the target identification area is improved at the same time.
Description
[technical field]
The present invention relates to RFID wireless communication technology field, particularly relate to the method and system of rfid interrogator multiple antennas identification electronic tag.
[background technology]
Along with the development of science and technology, rfid interrogator brings into use multiple antenna to identify electronic tag, and multiple antenna is mainly used in the identification range expanding read write line or the validity strengthened the covering of target identified region.At present, the rfid interrogator of multiple antennas adopts time-divisional scheme to make each antenna launch carrier wave in turn to carry out poll to electronic tag, and the situation that each antenna exists identification range overlap is not processed, only identify the electronic tag in each antenna rf field successively in turn, then the electronic labeling information recognized within the radio-frequency region from each antenna is gathered and upload to host computer.The weak point of the program is, the situation of the identification range overlap existed within the radio-frequency region not to each antenna processes, rfid interrogator each antenna when utilizing multiple antenna to carry out poll to electronic tag can be caused to repeat the label identifying that other antennas have recognized, thus reduce the efficiency that multiple antennas poll takes inventory identification, and the radio-frequency region overlap of each antenna of rfid interrogator is larger, the recognition efficiency of its read write line is lower.
[summary of the invention]
The invention provides a kind of method and system of rfid interrogator multiple antennas identification electronic tag, in order to ensure effective extended RFID read write line read range and strengthen to target identified region be coated with validity while, avoid repeating to identify electronic recognition in the radio-frequency region of each antenna, and then improve the recognition efficiency of rfid interrogator.
According to the first aspect of the embodiment of the present invention, a kind of method of rfid interrogator multiple antennas identification electronic tag is provided, comprises:
Receive recognition instruction, according to the aerial information comprised in described recognition instruction, indicate the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna;
By air interface identification electronic tag;
The described electronic tag identified taken inventory mark set.
In certain embodiments, described reception recognition instruction, according to the aerial information comprised in described recognition instruction, indicate the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag to comprise: receive recognition instruction, according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag;
Describedly to be comprised by air interface identification electronic tag: taken inventory the electronic tag being designated the first mark by air interface identification;
Described by the described electronic tag identified take inventory mark set comprise: after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.
In certain embodiments, the quantity information of this required electronic tag identified also is comprised in described recognition instruction; Described by the described electronic tag identified take inventory mark set after also comprise:
Whether the electronic tag taken inventory and be masked as the first mark cannot be recognized again in the radio-frequency field detecting described antenna;
When cannot recognize the electronic tag taken inventory and be masked as the first mark again in the radio-frequency field of described antenna, detect all electronic tags according to the quantity information of described electronic tag and whether identified completely;
All electronic tags identified completely complete after, terminate this identify.
In certain embodiments, describedly whether also to comprise after identifying completely according to all electronic tags of described number of labels infomation detection:
When all electronic tags are not identified completely, detect all antennas and whether all launch carrier wave in turn;
Remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
In certain embodiments, described when all electronic tags are not identified completely, detect after whether all antennas launch carrier wave all in turn and also comprise:
When carrier wave launched all in turn by all antennas, terminate this and identify, or after switching described rfid interrogator position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
According to the second aspect of the embodiment of the present invention, a kind of system of rfid interrogator multiple antennas identification electronic tag is also provided, comprises:
Power on module, for receiving recognition instruction, according to the aerial information comprised in described recognition instruction, indicates the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna;
First identification module, for by air interface identification electronic tag;
Mark set module, for taking inventory mark set by the described electronic tag identified.
In certain embodiments, the described module that powers on comprises electronic module, described upper electronic module is for receiving recognition instruction, and according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag;
Described identification module comprises recognin module, and described recognin module is used for taking inventory by air interface identification the electronic tag being designated the first mark;
Described mark set module comprises mark set submodule, described mark set submodule be used for after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.
In certain embodiments, the quantity information of this required electronic tag identified also is comprised in described recognition instruction; The system of described rfid interrogator multiple antennas identification electronic tag also comprises:
First detection module, for detect described antenna radio-frequency field in whether cannot recognize the electronic tag taken inventory and be masked as the first mark again;
Whether the second detection module, during for recognizing the electronic tag taken inventory and be masked as the first mark in the radio-frequency field of described antenna again, detect all electronic tags according to the quantity information of described electronic tag and identified completely;
Second identification module, for identified completely at all electronic tags complete after, terminate this identify.
In certain embodiments, also comprise:
3rd detection module, for when all electronic tags are not identified completely, detects all antennas and whether all launches carrier wave in turn;
Antenna switch module, for remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
In certain embodiments, also comprise:
3rd identification module, for when carrier wave launched all in turn by all antennas, terminates this and identify, or after switching described rfid interrogator position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
The technical scheme that the embodiment of the present invention provides can produce following beneficial effect: first receive recognition instruction, according to the aerial information comprised in described recognition instruction, indicates the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna; By air interface identification electronic tag; The described electronic tag identified taken inventory mark set.The present invention, by the described electronic tag identified taken inventory the recognition instruction that mark set ensures the electronic tag that identified no longer duplicate responses rfid interrogator, repeats to identify the problem of electronic tag in the radio-frequency region solving each antenna; Adopt the method, ensure the read range of effective extended RFID read write line and strengthen to target identified region be coated with validity while, turn improve recognition efficiency and the batch tag recognition ability of rfid interrogator.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write instructions, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
[accompanying drawing explanation]
Fig. 1 is the process flow diagram of the method for a kind of rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 2 is the process flow diagram of the method for the another kind of rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 3 is the process flow diagram of the method for another the rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 4 is the process flow diagram of the method for another the rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 5 is the block diagram of the system of a kind of rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 6 is the block diagram of the system of the another kind of rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 7 is the block diagram of the system of another the rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment;
Fig. 8 is the block diagram of the system of another the rfid interrogator multiple antennas identification electronic tag of the present invention according to an exemplary embodiment.
[embodiment]
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Disclosure embodiment provides a kind of method and system of rfid interrogator multiple antennas identification electronic tag, in order to ensure effective extended RFID read write line read range and strengthen to target identified region be coated with validity while, avoid repeating to identify electronic recognition in the radio-frequency region of each antenna, and then improve the recognition efficiency of rfid interrogator.As shown in Figure 1, the method comprising the steps of S10-S30:
In step slo, receive recognition instruction, according to the aerial information comprised in described recognition instruction, indicate the antenna transmission carrier wave corresponding with described aerial information to power on for the electronic tag in the radio-frequency region of this antenna; Described aerial information comprises the number information of antenna, the identification precedence information of antenna.In the present embodiment, the number information of described antenna can be worked out as required, thus how each antenna of rfid interrogator is all had uniquely and the numbering that can be identified; The identification precedence information of described antenna can be worked out equally as required, correspondingly with the number information of each antenna to associate, such as, antenna priority that in radio frequency coverage, electronic tag quantity is many can be made not front, intelligible, also the priority level of each antenna can be made all identical, now can transfer antenna transmission carrier wave at random in all antennas.
In step S20, by air interface identification electronic tag.After antenna transmission carrier wave corresponding with described aerial information in step slo, electronic tag powers on, and now, can be identified by the mark of taking inventory of air interface according to electronic tag.
In step s 30, mark set is taken inventory by the described electronic tag identified.Complete identification in step S20 after, the described electronic tag identified original can be identified take inventory mark set be can not be identified take inventory mark, thus the electronic tag identified no longer is identified, than the recognition instruction avoiding duplicate responses rfid interrogator in the radio-frequency region of another antenna.
In certain embodiments, as shown in Figure 2, step S10 can comprise step S101, receives recognition instruction, according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag; Also be, in step S101, identification priority level according to antenna starts antenna transmission carrier wave successively, so, in certain embodiments, the all electronic tags be identified needed for this are all identified complete, and when still having antenna not to be activated, need not continue to start residue antenna transmission carrier wave, but directly can terminate this identification thus enter to identify next time, save recognition time, improve recognition efficiency.
Step S20 can comprise step S201, is taken inventory the electronic tag being designated the first mark by air interface identification; In the present embodiment, the taking inventory of identifying that can respond in the radio-frequency region of antenna of described electronic tag is designated the first mark.
Step S30 can comprise step S301, after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.In the present embodiment, the taking inventory of identifying that cannot respond in the radio-frequency region of antenna of described electronic tag is designated the first mark.
In certain embodiments, the quantity information of this required electronic tag identified also is comprised in described recognition instruction; As shown in Figure 3, also comprise step S40-S60 after the step S30 of the method: in step s 40, in the radio-frequency field detecting described antenna, whether cannot recognize the electronic tag taken inventory and be masked as the first mark again; Also, namely, after starting antenna transmission carrier wave successively according to the identification priority level of antenna, judge whether whether all electronic tags that can be identified within the scope of this antenna rf have been identified complete all.
In step s 50, when cannot recognize the electronic tag taken inventory and be masked as the first mark again in the radio-frequency field of described antenna, detect all electronic tags according to the quantity information of described electronic tag and whether identified completely, also be, judge all electronic tags that can be identified within the scope of this antenna rf be all identified complete after, owing to also comprising the quantity information of the electronic tag identified needed for this in described recognition instruction, also be, the total quantity of known all electronic tags before recognition, now judge whether all electronic tags are identified completely, and in step S60, all electronic tags identified completely complete after, even if still there is antenna not to be activated, also need not continue to start residue antenna transmission carrier wave, but this identification can be terminated thus enter to identify next time, save recognition time, improve recognition efficiency.Such as, the quantity of this required electronic tag identified known is 100, antenna amount is 6, when antenna starts after 3, when the label information of all 100 electronic tags be identified needed for this has just all been identified and has obtained complete, can continue to start remaining 3 antenna transmission carrier waves, but directly can terminate this identification thus enter to identify next time, save recognition time, improve recognition efficiency.
In certain embodiments, as shown in Figure 4, also step S70-S80 is comprised after the step S50 of the method:
In step S70, when all electronic tags are not identified completely, detect all antennas and whether all launch carrier wave in turn; Also be, judge all electronic tags that can be identified within the scope of this antenna rf be all identified complete after, owing to also comprising the quantity information of the electronic tag identified needed for this in described recognition instruction, also be, the total quantity of known all electronic tags before recognition, now judge whether all electronic tags are identified completely, and when all electronic tags are not identified completely, detect all antennas and whether all launch carrier wave in turn, and then judge it is terminate this identification or start antenna transmission carrier wave to proceed to identify.
In step S80, remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
In certain embodiments, as shown in Figure 4, also step S90 is comprised after the step S70 of the method:
In step S90, in one embodiment, when carrier wave launched all in turn by all antennas, point out all antennas all to take turns starting one time, this identification completes, terminates this and identifies, also be, due to all antennas start complete after all cannot in its radio-frequency region identification label, therefore need the position of mobile RFID read write line or adopt other measures to identify remaining electronic tag, therefore can stop this and identify.In another embodiment, when carrier wave launched all in turn by all antennas, directly prompting switches described rfid interrogator position, and after switching position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
The said method that the embodiment of the present invention provides, by the described electronic tag identified taken inventory the recognition instruction that mark set ensures the electronic tag that identified no longer duplicate responses rfid interrogator, in the radio-frequency region solving each antenna, repeat to identify the problem of electronic tag; Ensure the read range of effective extended RFID read write line and strengthen to target identified region be coated with validity while, turn improve recognition efficiency and the batch tag recognition ability of rfid interrogator.Meanwhile, utilize the identification priority of antenna to make antenna start in turn, saved recognition time, improve recognition efficiency.
The method of the rfid interrogator multiple antennas identification electronic tag that the corresponding embodiment of the present invention provides, the present invention also provides the system of rfid interrogator multiple antennas identification electronic tag, and as shown in Figure 5, this system can comprise:
Power on module 61, for receiving recognition instruction, according to the aerial information comprised in described recognition instruction, indicates the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna;
First identification module 62, for by air interface identification electronic tag;
Mark set module 63, for taking inventory mark set by the described electronic tag identified.
In certain embodiments, as shown in Figure 6, the described module 61 that powers on comprises electronic module 611, described upper electronic module 611 is for receiving recognition instruction, according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag;
Described identification module 62 comprises recognin module 621, and described recognin module 621 is for taking inventory the electronic tag being designated the first mark by air interface identification;
Described mark set module 63 comprises mark set submodule 631, described mark set submodule 631 for after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.
In certain embodiments, as shown in Figure 7, the quantity information of this required electronic tag identified also is comprised in described recognition instruction; The system of described rfid interrogator multiple antennas identification electronic tag also comprises:
First detection module 64, for detect described antenna radio-frequency field in whether cannot recognize the electronic tag taken inventory and be masked as the first mark again;
Whether the second detection module 65, during for recognizing the electronic tag taken inventory and be masked as the first mark in the radio-frequency field of described antenna again, detect all electronic tags according to the quantity information of described electronic tag and identified completely;
Second identification module 66, for identified completely at all electronic tags complete after, terminate this identify.
In certain embodiments, as shown in Figure 8, the system of described rfid interrogator multiple antennas identification electronic tag also comprises:
3rd detects mould 67 pieces, for when all electronic tags are not identified completely, detects all antennas and whether all launches carrier wave in turn;
Antenna switch module 68, for remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
In certain embodiments, the system of described rfid interrogator multiple antennas identification electronic tag also comprises:
3rd identification module 69, for when carrier wave launched all in turn by all antennas, terminates this and identify, or after switching described rfid interrogator position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for rfid interrogator multiple antennas identification electronic tag, is characterized in that, comprising:
Receive recognition instruction, according to the aerial information comprised in described recognition instruction, indicate the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna;
By air interface identification electronic tag;
The described electronic tag identified taken inventory mark set.
2. the method for rfid interrogator multiple antennas identification electronic tag as claimed in claim 1, it is characterized in that, described reception recognition instruction, according to the aerial information comprised in described recognition instruction, indicate the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag to comprise: receive recognition instruction, according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag;
Describedly to be comprised by air interface identification electronic tag: taken inventory the electronic tag being designated the first mark by air interface identification;
Described by the described electronic tag identified take inventory mark set comprise: after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.
3. the method for rfid interrogator multiple antennas identification electronic tag as claimed in claim 2, is characterized in that, also comprises the quantity information of this required electronic tag identified in described recognition instruction; Described by the described electronic tag identified take inventory mark set after also comprise:
Whether the electronic tag taken inventory and be masked as the first mark cannot be recognized again in the radio-frequency field detecting described antenna;
When cannot recognize the electronic tag taken inventory and be masked as the first mark again in the radio-frequency field of described antenna, detect all electronic tags according to the quantity information of described electronic tag and whether identified completely;
All electronic tags identified completely complete after, terminate this identify.
4. whether the method for rfid interrogator multiple antennas identification electronic tag as claimed in claim 3, is characterized in that, describedly also comprise after identifying completely according to all electronic tags of described number of labels infomation detection:
When all electronic tags are not identified completely, detect all antennas and whether all launch carrier wave in turn;
Remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
5. the method for rfid interrogator multiple antennas identification electronic tag as claimed in claim 4, is characterized in that, described when all electronic tags are not identified completely, detects after whether all antennas launch carrier wave all in turn and also comprises:
When carrier wave launched all in turn by all antennas, terminate this and identify, or after switching described rfid interrogator position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
6. a system for rfid interrogator multiple antennas identification electronic tag, is characterized in that, comprising:
Power on module, for receiving recognition instruction, according to the aerial information comprised in described recognition instruction, indicates the antenna transmission carrier wave corresponding with described aerial information to power on for electronic tag; Described aerial information comprises the number information of antenna, the identification precedence information of antenna;
First identification module, for by air interface identification electronic tag;
Mark set module, for taking inventory mark set by the described electronic tag identified.
7. the system of rfid interrogator multiple antennas identification electronic tag as claimed in claim 6, it is characterized in that, the described module that powers on comprises electronic module, described upper electronic module is for receiving recognition instruction, according to the identification precedence information of all antennas comprised in described recognition instruction, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag;
Described identification module comprises recognin module, and described recognin module is used for taking inventory by air interface identification the electronic tag being designated the first mark;
Described mark set module comprises mark set submodule, described mark set submodule be used for after detecting that described electronic tag is identified, by described electronic tag take inventory mark by described first mark set be can not respond identification second mark.
8. the system of rfid interrogator multiple antennas identification electronic tag as claimed in claim 7, is characterized in that, also comprises the quantity information of this required electronic tag identified in described recognition instruction; The system of described rfid interrogator multiple antennas identification electronic tag also comprises:
First detection module, for detect described antenna radio-frequency field in whether cannot recognize the electronic tag taken inventory and be masked as the first mark again;
Whether the second detection module, during for recognizing the electronic tag taken inventory and be masked as the first mark in the radio-frequency field of described antenna again, detect all electronic tags according to the quantity information of described electronic tag and identified completely;
Second identification module, for identified completely at all electronic tags complete after, terminate this identify.
9. the system of rfid interrogator multiple antennas identification electronic tag as claimed in claim 8, is characterized in that, also comprise:
3rd detection module, for when all electronic tags are not identified completely, detects all antennas and whether all launches carrier wave in turn;
Antenna switch module, for remaining when not launching the antenna of carrier wave, according to all identification precedence informations not launching the antenna of carrier wave, in the antenna not launching carrier wave, the most front antenna transmission carrier wave of instruction priority level arrangement powers on for electronic tag.
10. the system of rfid interrogator multiple antennas identification electronic tag as claimed in claim 9, is characterized in that, also comprise:
3rd identification module, for when carrier wave launched all in turn by all antennas, terminates this and identify, or after switching described rfid interrogator position, the antenna that self-identifying priority level is the highest starts again to launch carrier wave in turn.
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| CN109800829A (en) * | 2018-12-04 | 2019-05-24 | 北京千方科技股份有限公司 | It is a kind of for the signal timesharing sending method of vehicle identification, apparatus and system |
| CN109800829B (en) * | 2018-12-04 | 2022-02-18 | 北京千方科技股份有限公司 | Signal time-sharing sending method, device and system for vehicle identification |
| CN111310486A (en) * | 2018-12-12 | 2020-06-19 | 航天信息股份有限公司 | Vehicle identification method and supervision equipment |
| CN111310486B (en) * | 2018-12-12 | 2023-07-14 | 航天信息股份有限公司 | Vehicle identification method and supervision equipment |
| WO2024088147A1 (en) * | 2022-10-25 | 2024-05-02 | 华为技术有限公司 | Communication method and apparatus |
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| CN105260690B (en) | 2018-02-23 |
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