CN107016313A - Space determines the method and device of RFID position indoors - Google Patents
Space determines the method and device of RFID position indoors Download PDFInfo
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- CN107016313A CN107016313A CN201710207882.2A CN201710207882A CN107016313A CN 107016313 A CN107016313 A CN 107016313A CN 201710207882 A CN201710207882 A CN 201710207882A CN 107016313 A CN107016313 A CN 107016313A
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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
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10019—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers.
- G06K7/10079—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
- G06K7/10089—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision
- G06K7/10099—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves resolving collision on the communication channels between simultaneously or concurrently interrogated record carriers. the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse
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Abstract
The present invention relates to a kind of method that space indoors determines RFID position, including：Main read write line in locating base station sends request of data, and the first label chip transmission first into the positioning label in main read write line coverage returns signal to main read write line；The locating base station for receiving the first return signal starts one from read write line transmission request of data；The working frequency range of master and slave read write line is differed；Judge whether to receive to come from read write line the second return signal of self-positioning label, in this way, it is determined that the current position range of positioning label；Otherwise, start another in locating base station from read write line, all from read write line or the current position range of positioning label is determined until traveling through.The invention further relates to a kind of device for realizing the above method.The space indoors for implementing the present invention determines the method and device of RFID position, has the advantages that：Do not need more data operation to can be realized as accurate position to determine.
Description
Technical field
The present invention relates to field of radio frequency identification, RFID is determined more specifically to a kind of space indoors
The method and device of position.
Background technology
Positioned for personnel or equipment, if necessary to be carried out in a wide range of or field, then in most cases, GPS or north
Bucket system can just be solved well, be the positioning terminal of personnel or the big system of device configuration above-mentioned two, it becomes possible to be realized almost
It is all to receive the positioning of satellite-signal position, and position location is more accurate.But, satellite-signal can not received, defended
The place of star poor signal or location overlap, for example, the space of location overlap is (for example, more in the hall of building or in high building
Individual overlapping space in height), even if above-mentioned localization method can not then be positioned or positioning reluctantly, effect is also excessively poor.And
Some when, the record of positioning or motion track in the above-mentioned space that can not be positioned is highly desirable to again, in prior art
In, it will usually positioning is realized using other technological means is superimposed in above-mentioned location technology, for example, adding mobile base using GPS
The GPSONE stood.But, because the sphere of action of base station is than larger, and its directionality is poor, and such positioning is also only one
The estimation of individual Position Approximate.Therefore, in the prior art, in some specific occasions, for example, in the hall of a building
Or in the garden of top seal, due to the missing of satellite-signal, accurate positioning can not be realized.
The content of the invention
The technical problem to be solved in the present invention is, for the above-mentioned indoors due to the missing of satellite-signal of prior art
And can not realize the defect accurately positioned can carry out what interior was more accurately positioned there is provided a kind of without satellite-signal
Space determines the method and device of RFID position indoors.
The technical solution adopted for the present invention to solve the technical problems is：A kind of space indoors of construction determines RFID electronics
The method of label position, comprises the following steps：
A) the main read write line in locating base station sends request of data, the positioning mark into the main read write line coverage
First label chip of label sends first and returns signal to the main read write line；
B) receive first return signal locating base station start one from read write line send request of data, it is described from
Read write line coverage includes a part for the main read write line coverage；The working frequency range of the master and slave read write line not phase
Together；
C the second return signal from the positioning label whether is received from read write line described in) judging, in this way, it is determined that
The position range that the positioning label is currently located；Otherwise, another started in the locating base station is repeated from read write line
Step B) and C), until traveling through all positions being currently located from read write line or the determination positioning label in the locating base station
Put scope.
Further, the locating base station includes main read write line, multiple from read write line and controlled the multiple
The control unit of read write line；The multiple working frequency range from read write line is identical with using agreement, in the control of described control unit
Under system, start work one by one, until the locating base station receives the second return signal that the positioning label is sent；It is described many
The individual coverage from read write line includes a part for the main read write line coverage, multiple covering models from read write line respectively
Enclosing includes the coverage of the main read write line.
Further, it is described by the set location difference of the read write line or reading and writing device antenna it to be covered from read write line
Lid scope is different or described identical but different coverages are realized by different antenna structures from read write line set location.
Further, the step C) in, the positioning label is receiving the main read write line request of data or hair
First is sent when returning signal to main read write line, starts the second label chip on the positioning label, waits what is sent from read write line
Request of data.
Further, second label chip is sent to described from the return signal of read write line, carries by this
The identity code of main read write line that is obtained in the memory shared in positioning label, the identity code of the first label chip and
The identity code of second label chip.
Further, the step C) in, pass through the main reading carried described in comparison from the signal that read write line is received
Write device identity code and the first label chip identity code whether identity code with the main read write line and institute
State the first label chip identity code that main read write line receives identical, such as all same, judge that the signal returns for second and believe
Number.
Further, also comprise the following steps：
According to the signal intensity of second return signal, acquirement of tabling look-up is described to position label and described from reading and writing device antenna
The distance of set location, further reduces the scope of the position of the positioning label.
The invention further relates to a kind of device for realizing the above method, including：
First return signal acquisition unit：For making main read write line in locating base station send request of data, into described
First label chip of the positioning label in main read write line coverage sends first and returns signal to the main read write line；
From read write line start unit：For making the locating base station for receiving first return signal start one from read-write
Device sends request of data, described to include a part for the main read write line coverage from read write line coverage；It is described master and slave
The working frequency range of read write line is differed；
Position judgment unit：Second returning from the positioning label whether is received for judging described from read write line
Signal, in this way, determines the position range that the positioning label is currently located；Otherwise, opened described in calling from read write line start unit
Another in the locating base station is moved from read write line and calling station judging unit, until traveling through in the locating base station
All position ranges being currently located from read write line or the determination positioning label.
Further, the locating base station includes main read write line, multiple from read write line and controlled the multiple
The control unit of read write line；The multiple working frequency range from read write line is identical with using agreement, in the control of described control unit
Under system, start work one by one, until the locating base station receives the second return signal that the positioning label is sent；It is described many
The individual coverage from read write line includes a part for the main read write line coverage, multiple covering models from read write line respectively
Enclosing includes the coverage of the main read write line；It is described from read write line by the set location of the read write line or reading and writing device antenna not
With so that its coverage is different or described identical but different by different antenna structure realizations from read write line set location
Coverage.
Further, in addition to：
Signal intensity judging unit：For the signal intensity according to second return signal, the acquirement positioning of tabling look-up
Label and the distance from reading and writing device antenna set location, further reduce the scope of the position of the positioning label.
The space indoors for implementing the present invention determines the method and device of RFID position, with following beneficial effect
Really：By using with it is multiple and with master slave relation read write line locating base station to multiple and related electronics marks
The positioning electronic tag for signing chip coordinates, and the return letter that different electronic label chips are sent is obtained on different read write lines
Number, and the identity identification information of these return signals carrying is handled, determine these signals by same positioning label hair
Go out；Because the coverage of multiple read write lines is overlapping and known, therefore connecing by the above-mentioned signal with logical relation
Receive, pass through simple logic judgment, it becomes possible to the position progressively reduced where the positioning label, and then relatively accurately taken
Position where personnel with the positioning label.Therefore, it does not need more data operation to can be realized as accurately
Position is determined.
Brief description of the drawings
Fig. 1 is that space determines method stream in the method and device embodiment of RFID position to the present invention indoors
Cheng Tu；
Fig. 2 is a space orientation base station location and coverage schematic diagram in the embodiment；
Fig. 3 is the structural representation of locating base station in the embodiment；
Fig. 4 is the structural representation of positioning label in the embodiment；
Fig. 5 is that device connects schematic diagram in the embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated.
As shown in figure 1, determining the method and device embodiment of RFID position in the space indoors of the present invention
In, the composition of its alignment system includes the locating base station and the locating base station of multiple interior spaces for being arranged on needs positioning
The positioning label carried by the server of network connection and by personnel.Wherein, each locating base station includes a main RFID
Read write line (main read write line) and multiple from RFID reader (from read write line), the main read write line of said one and it is multiple from read write line by
Control unit is controlled, when locating base station is started working, and main read write line works, but multiple is not worked from read write line；Only exist
When the main read write line receives the return signal that a positioning label is sent, these are from read write line just in the control of control unit
Under, work one by one.In other words, one from read write line work when, other are idle from read write line.From read write line work simultaneously
When receiving the second return signal (signal is sent by the different piece of above-mentioned positioning label), control unit will be received twice
Data content in signal is uploaded to the server by network connection, and server is according to these data contents, by simple
Logic judgment can just obtain positioning the position range where label.If follow-up reselection other modes are verified, can
The position limitation of the positioning label obtained with will determine that is in a less scope, so as to realize accurate positioning.
In the present embodiment, the not just traditional RFID of label is positioned, but one has multiple electronic tags
The complex of chip；Positioning label at least includes two electronic label chips, and one is used to carry out between above-mentioned main read write line
Data interaction, another be used for from carrying out data interaction between read write line, again by being arranged on above-mentioned positioning label
The above-mentioned electronic label chip with carrying out data interaction from read write line of control unit control thereon.Specifically, in this implementation
In example, above-mentioned localization method includes：
The main read write line of step S11 locating base stations obtains positioning label and sends the first return signal：In the present embodiment, it is fixed
Main read write line on the base station of position sends request of data, into the first label core of the positioning label in the main read write line coverage
Piece sends first and returns signal to the main read write line.Due to multiple locating base stations, Mei Geding may be installed in an interior space
The coverage or sphere of action of position base station are different, but multiple locating base stations substantially cover the interior space.Do not having
When any one positioning label enters the above-mentioned interior space, the main read write line work of above-mentioned each locating base station is respectively equal from read write line
Do not work.Electrical source consumption, the Electromagnetic Interference reduced in the space can not only so be saved, additionally it is possible to position label at one
During into the above-mentioned interior space, its region is generally determined according to the main read write line for receiving the first return signal.And
Positioning label is not when entering into the sphere of action of any one locating base station, yet only one of which electronic tag core on the positioning label
Piece part (be usually the first electronic label chip, including its connection antenna and with another electronic label chip partial sharing
Memory etc.) work, another electronic label chip part (being usually the second electronic label chip part) be it is idle,
Also the signal that any read write line is sent will not be received；Therefore, the area of coverage that label enters a locating base station is positioned when one
During domain, the first electronic chip in positioning label is partially received the request of data that the main read write line of locating base station is sent, and sends
Above-mentioned main read write line is returned signal to, the return signal is the first return signal, wherein carrying the first electronic label chip portion
The identity code divided.The request of data that the main read write line for being partially received locating base station in above-mentioned first electronic chip is sent
When, the control unit carried in the request of data in the pincode of main read write line, positioning label will be in the signal
The pincode of above-mentioned main read write line is taken out, and is stored to multiple electronic label chip parts of the positioning label and is total to
Specified location in the memory cell enjoyed, in order to the use in subsequent step.In the present embodiment, if said memory cells
In specified location on former prior data, then in above process, original data will be capped.
One in step S12 startup locating base stations receives the return signal of positioning label transmission from read write line：At this
In step, the main read write line in locating base station is received after above-mentioned first return signal, by being arranged in above-mentioned locating base station
Control unit make it that one in the control base station starts from read write line, should after read write line startup, send request of data or
Activation signal；Now, for above-mentioned positioning label, because it is received or sends radiofrequency signal, therefore control thereon
Unit processed starts the second electronic label chip part on the positioning label.Due to the upper main read write line of locating base station
Identical frequency range and agreement are used with the first electronic label chip part on positioning label；In locating base station from read write line and
Position the second electronic label chip on label and use identical frequency range and agreement, therefore position the second electronic tag on label
Chip part can receive the request of data sent from read write line or activation signal of above-mentioned locating base station, and then, this second
Electronic label chip part send return signal to above-mentioned locating base station should from read write line, this return signal is the second return
Signal.
Step S13 judge whether to receive return signal and whether the second return signal, next step is performed in this way；It is no
Then, return to above-mentioned steps S12, start two outer one not yet started in this judgement from read write line.In the present embodiment,
Because a locating base station includes multiple from read write line, and each coverage from read write line is different, multiple from read write line
Coverage include the coverage of above-mentioned main read write line, accordingly, it is possible to one from read write line startup after can not obtain
It is not above-mentioned second return signal to position the return signal of label or the signal of return, and such case is typically above-mentioned positioning mark
Sign and in the coverage from read write line.Therefore, in this step, it is necessary to judge whether that receiving above-mentioned second returns to letter
Number.Specifically include two steps, one has been whether signal return, another is whether the signal that returns is above-mentioned the
Two return signals, if can obtain the judgement of affirmative in two steps, then it is assumed that the signal received is by above-mentioned positioning
Label is sent to above-mentioned the second return signal from read write line；One step of any of which can not be affirmed, then judge not receive
It is not the second return signal to the second return signal or the signal received, now, no longer performs next step, but return to step
Rapid S12, starts another in the locating base station from read write line, again in the coverage of above-mentioned main read write line in addition
One region sends request of data or activation signal, and judges whether to receive the second return signal.It is noted that opening
Another is opened when the read write line, the signal for originally opening but being not received by signal or receiving is not the second return signal
Will be closed from read write line.That is, whenever, most only one of which are from read write line work in a locating base station
Make.So set and be advantageous in that, the coverage from read write line in a locating base station, due to putting position restriction and
The restriction of antenna structure, is inevitably present overlapping position, if two overlapped coverages are opened from read write line simultaneously
Open, the second return signal of the positioning label on lap position can simultaneously be received from read write line by two, can so give it
In one bring difficulty from the judgement of read write line, and the step of judgement can be increased.In the present embodiment, if never received
To above-mentioned second return signal, then the locating base station from read write line will rotation always start, until receiving above-mentioned second
Return signal travels through all from read write line of the locating base station.
In the present embodiment, it is described that it is caused by the set location difference of the read write line or reading and writing device antenna from read write line
Coverage is different or described identical but different covering models are realized by different antenna structures from read write line set location
Enclose.And in above-mentioned positioning label, its second electronic label chip part is sent to second return signal from read write line
In, carry identity code, the first electronic tag of the main read write line obtained in the memory shared in the positioning label
The identity code of chip part and the identity code of the second electronic label chip part.In this step, locating base station is sentenced
When whether the signal that disconnecting is received is the second return signal, a crucial step be compare whether carried in the signal it is above-mentioned
Identity code, and these identity code (mainly identifications of main read write line and the first electronic label chip part
Code) it is whether identical with the identity code of main read write line known to the locating base station and the first electronic label chip part.So
Judgement by simply contrast it is achieved that need not be related to complexity calculating.
Step S14 determines the position range of the positioning label according to two read write line coverages：In the present embodiment,
Have in above-mentioned two return signal, above-mentioned main read write line and an identity code from read write line can be readily available, for
For system, each main read write line or set or know in advance from the coverage of read write line, in this case, by
The identity code of above-mentioned main read write line is just able to know that approximate location of the positioning label in the above-mentioned interior space, then by from
The identity code of read write line by the range shorter into the coverage from read write line, in a locating base station
For master and slave read write line, the coverage from read write line is main read write line coverage in the coverage of main read write line
A part.So, in the present embodiment, it is only necessary to simple to judge, it becomes possible to obtain positioning the accurate position of label
Put, eliminate the calculating process of complexity.Under certain situation in the present embodiment, such position range has been able to meet and wanted
Ask.
Step S15 further reduces the positioning label position scope according to the intensity of the second return signal：In this step
In rapid, by the detection of the signal intensity to above-mentioned second return signal, obtain representing the parameter of signal intensity, such as RSSI or
Similar parameter, then by search exist in advance in locating base station or in read write line signal intensity and distance correspondence form
Mode, further reduce the positioning label and from the position range in read write line coverage, obtaining more accurately positioning
Information.In the present embodiment, in some cases, above-mentioned signal intensity not only can also be carried out to above-mentioned second return signal
Detection, can also carry out signal strength detection to above-mentioned the first return signal for receiving, and tables look-up and obtain the positioning label and exist
More defined location in main read write line coverage.So, the obtained position that two can be tabled look-up mutually compares or taken
Its average value, is then handled or is calculated again and finally obtain an accurate positional information.Certainly, the benefit so done
It is obvious, but cost is also obvious, and its operand can be increased.
It is noted that in the present embodiment, the location information that locating base station is sent to server is typically multiple bodies
The signal intensity of part identification code and return signal.In most cases, server is strong by these identity codes and signal
Degree, and storage positional information on the server, signal intensity form etc., it becomes possible to obtain positioning the position of label.And
Two identity codes of positioning label are transferred to server and also have an effect to be that can know the identity positioned on label
Other code discipline is got off, and confirms the identity of positioning label.When the follow-up positioning label occurs, it is verified or found be new
The positioning label of entrance.Because alignment system can not can know that the identity code of all positioning labels.Never go out when one
When the positioning label now crossed appears in some occasions, remind operating personnel to go to and check, it is ensured that safety.
Fig. 2 shown in an interior space, the coverage condition of a locating base station.Wherein it is provided with the interior space 20
Multiple locating base stations (one of them is shown in Fig. 2), the sphere of action of these locating base stations covers the whole interior space 20, Fig. 2
In locating base station main read write line coverage 21, three coverages from read write line be 21,22 and 23.In Fig. 2 from
The coverage of main read write line is divided into some by the coverage of read write line, therefore, when it is determined that one connects from read write line
When receiving above-mentioned second return signal, it becomes possible to which the position of positioning label is narrowed down into this from reading by the coverage of main read write line
Write the coverage of device.In some cases, due to the complexity of interior space shape, may multiple main read write lines covering
Occur in scope it is overlapping, at this time it is also possible to by the way of multiple locating base station polls.Because the quantity of locating base station will be much
The above-mentioned interior space is divided into by the way of the acceptable band of position less than using independent read write line, therefore, even in
Under this extreme case, independent reading is also far smaller than used using the poll time of the alignment system of the method in the present embodiment
Write the poll time of device, it means that in the case of positioning label densities on an equal basis, using the positioning system of method in the present embodiment
System has more time-triggered protocol conflict, and the possibility for occurring failing to report is substantially reduced.
Fig. 3 and Fig. 4 show in the present embodiment, a kind of structure of locating base station and positioning label.As can be seen that in figure
In 3 and Fig. 4, start maintenance work is the main read write line of locating base station and the first RFID chip of positioning label.
After locating base station receives the first return signal and current potential label receives or sends radiofrequency signal, pass through respective control respectively
Unit so that started working from read write line and the second RFID chip.
The invention further relates to a kind of device for realizing the above method, including the first return signal acquisition unit 1, from read write line
Start unit 2, position judgment unit 3 and signal intensity judging unit 4；Wherein, the first return signal acquisition unit 1 is used to make to determine
Main read write line on the base station of position sends request of data, into the first label of the positioning label in the main read write line coverage
Chip sends first and returns signal to the main read write line；It is used to make to receive first return from read write line start unit 2
The locating base station of signal starts one and sends request of data from read write line, described to include the main read-write from read write line coverage
A part for device coverage；The working frequency range of the master and slave read write line is differed；Position judgment unit 3 is used to judge described
The second return signal from the positioning label whether is received from read write line, in this way, the current institute of the positioning label is determined
Position range；Otherwise, call it is described from read write line start unit start the locating base station in another from read-write
Device and calling station judging unit, until traveling through all in the locating base station from read write line or determining that the positioning label is worked as
The position range at preceding place；Signal intensity judging unit 4 is used for the signal intensity according to second return signal, acquirement of tabling look-up
The positioning label and the distance from reading and writing device antenna set location, further reduce the position of the positioning label
Scope.
In addition, in the present embodiment, the locating base station includes a main read write line, multiple from read write line and control institute
State the control unit of multiple read write lines；The multiple working frequency range from read write line is identical with using agreement, single in the control
Under the control of member, start work one by one, until the locating base station receives the second return signal that the positioning label is sent；
The multiple coverage from read write line includes a part for the main read write line coverage respectively, multiple from read write line
Coverage includes the coverage of the main read write line；It is described from setting of the read write line by the read write line or reading and writing device antenna
Position difference causes its coverage different or described identical but real by different antenna structures from read write line set location
Existing different coverage.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of method that space indoors determines RFID position, it is characterised in that comprise the following steps：
A) the main read write line in locating base station sends request of data, into the positioning label in the main read write line coverage
First label chip sends first and returns signal to the main read write line；
B the locating base station for) receiving first return signal starts one from read write line transmission request of data, described from read-write
Device coverage includes a part for the main read write line coverage；The working frequency range of the master and slave read write line is differed；
C second return signal that the second label chip from the positioning label whether is received from read write line) is judged,
In this way, the position range that the positioning label is currently located is determined；Otherwise, another in the locating base station is started from reading
Write device repeat step B) and C), it is all current from read write line or the determination positioning label in the locating base station until traveling through
The position range at place.
2. the method that space indoors according to claim 1 determines RFID position, it is characterised in that described
Locating base station includes a main read write line, multiple control units from read write line and the multiple read write line of control；It is described many
The individual working frequency range from read write line is identical with using agreement, under the control of described control unit, starts work, Zhi Daosuo one by one
State locating base station and receive the second return signal that the positioning label is sent；The multiple coverage from read write line is distinguished
Include a part for the main read write line coverage, multiple coverages from read write line include the covering of the main read write line
Scope.
3. the method that space indoors according to claim 2 determines RFID position, it is characterised in that described
Make it that its coverage is different or described from reading from read write line by the set location difference of the read write line or reading and writing device antenna
Write device set location identical but different coverages are realized by different antenna structures.
4. the method that space indoors according to claim 3 determines RFID position, it is characterised in that described
Step C) in, the positioning label first returns signal to main read write line receiving the main read write line request of data or send
When, start the second label chip on the positioning label, wait the request of data sent from read write line.
5. the method that space indoors according to claim 4 determines RFID position, it is characterised in that described
Second label chip is sent to described from the return signal of read write line, carries in the memory by being shared in the positioning label
The identification of the identity code of obtained main read write line, the identity code of the first label chip and the second label chip
Code.
6. the method that space indoors according to claim 5 determines RFID position, it is characterised in that described
Step C) in, by the identity code and the first mark of the main read write line carried described in comparison from the signal that read write line is received
Sign the first the mark whether identity code of chip receives with the identity code and the main read write line of the main read write line
Sign chip identity code identical, such as all same, judge the signal for the second return signal.
7. the method that the space indoors according to claim 1-6 any one determines RFID position, it is special
Levy and be, also comprise the following steps：
According to the signal intensity of second return signal, acquirement of the tabling look-up positioning label is set with described from reading and writing device antenna
The distance of position, further reduces the scope of the position of the positioning label.
8. a kind of realize that space indoors as claimed in claim 1 determines the device of RFID location method, it is special
Levy and be, including：
First return signal acquisition unit：For making the main read write line in locating base station send request of data, into the main reading
The the first label chip transmission first for writing the positioning label in device coverage returns signal to the main read write line；
From read write line start unit：Sent out for making the locating base station for receiving first return signal start one from read write line
Request of data is sent, it is described to include a part for the main read write line coverage from read write line coverage；The master and slave read-write
The working frequency range of device is differed；
Position judgment unit：Believe for judging described from whether read write line receives the second return from the positioning label
Number, in this way, determine the position range that the positioning label is currently located；Otherwise, call described from the startup of read write line start unit
Another in the locating base station is from read write line and calling station judging unit, until traveling through the institute in the locating base station
Have from read write line or determine the position range that the positioning label is currently located.
9. device according to claim 8, it is characterised in that the locating base station includes main read write line, a Duo Gecong
The control unit of read write line and the multiple read write line of control；The multiple working frequency range and use agreement phase from read write line
Together, under the control of described control unit, start work one by one, sent until the locating base station receives the positioning label
The second return signal；The multiple coverage from read write line includes one of the main read write line coverage respectively
Point, multiple coverages from read write line include the coverage of the main read write line；It is described to pass through the read write line from read write line
Or the set location difference of reading and writing device antenna make it that its coverage is different or described identical but logical from read write line set location
Cross different antenna structures and realize different coverages.
10. device according to claim 9, it is characterised in that also include：
Signal intensity judging unit：For the signal intensity according to second return signal, the acquirement positioning label of tabling look-up
With the distance from reading and writing device antenna set location, the scope of the position of the positioning label is further reduced.
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| CN201710207882.2A CN107016313B (en) | 2017-03-31 | 2017-03-31 | Method and device for determining position of RFID electronic tag in indoor space |
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