CN104504413B - A kind of RFID antenna deployment system monitored in real time for warehouse and method - Google Patents
A kind of RFID antenna deployment system monitored in real time for warehouse and method Download PDFInfo
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- CN104504413B CN104504413B CN201410660090.7A CN201410660090A CN104504413B CN 104504413 B CN104504413 B CN 104504413B CN 201410660090 A CN201410660090 A CN 201410660090A CN 104504413 B CN104504413 B CN 104504413B
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Abstract
The invention discloses a kind of RFID antenna deployment system monitored in real time for warehouse and method, the system, which is included in warehouse, arranges shelf, RFID reader, RFID antenna, photoelectric sensor, GPIO Box conversion and controls case, wireless router, and wherein RFID antenna is deployed in the upper side of each interlayer framework of shelf with the degree of tilt β set；Wherein RFID antenna is connected with RFID reader by RFID cables, during test, posts the product placement of RFID label tag on the shelf among each interlayer framework of shelf, and RFID reader is pasted onto the RFID label tag on product by RFID antenna identification；The deployment functional value of RFID antenna is calculated according to the deployment function of RFID antenna, and RFID antenna height residing in each interlayer framework, position, angle are adjusted, obtain optimal identification energy threshold, using this energy threshold as judge RFID antenna whether be optimal deployed position foundation.This method realizes the RFID antenna Optimization deployment that warehouse monitors in real time, reduces the signal interference of adjacent warehouse compartment.
Description
Technical field
The present invention relates to electronic information technical field, more particularly, to a kind of RFID antenna portion monitored in real time for warehouse
Affix one's name to system and method.
Background technology
With developing rapidly for information science, with RFID (Radio Frequency in Internet of Things
Identification) technology, i.e. radio RF recognition technology are in manufacturing industry supply chain logisticses, the manufacturing and traffic administration etc.
Various fields are widely applied.Because different types of product passes through the pose pattern sum of product during RFID identification scope
Amount is different, and the electromagnetic environment and space disposed around the gate of RFID antenna are also different, therefore difficult finds optimization
RFID antenna dispositions method, the application environment of the RFID antenna deployment of optimization are needed to RFID reader antenna height, antenna
Position, aerial angle carry out complex optimum.
At present, the automatic identification to warehouse article is RFID technique typical case, it is possible to achieve real time inventory, automatic goods
Position management, real-time query, intellectual analysis, raising warehousing and storage activities efficiency.By ring around when reading and writing different product using RFID antenna
Border, product form, neighbouring electromagnetic environment have a great influence, and need to RFID in the three dimensions actual environment residing for the commodity of storehouse
Height, position and the angle of allocating antenna optimize.Liu waits soon《Computer application is studied》The opinion that 4th phase in 2012 delivers
Literary " Optimization deployment of the RFID network based on hybrid particle swarm ", this article describes the optimization of the RFID antenna in Two-Dimensional Moment plane
Deployment, this method come the position of Optimization deployment read write line, read read write line multiple by a kind of Hybrid Particle Swarm
The problem of label information reduces conflict simultaneously, but the dispositions method does not consider read-write knowledge of the solid space environment to RFID antenna
Other performance impact；Liu Yu etc., should at patent of invention CN 101872885B " a kind of system and method for RFID antenna rapid deployment "
Method utilizes the different spatial in gate frame structure and angle by arranging gate frame structure in the lab environment that comes in and goes out
Degree deployment RFID antenna, the parameter combinations of more one or more RFID antennas is under site of deployment environment to being pasted onto on commodity
RFID label tag recognition performance, but this method do not account for RFID antenna deployment in RFID antenna deployment height, position,
The Index Constraints of angle, it is impossible to realize maximization covering of the RFID antenna to warehouse region to be monitored, and RFID reader is penetrated
The overlapping covering of frequency signal, the RFID reader conflict and RFID label tag conflict that will also result in, can not realize that warehouse monitors in real time
Middle RFID antenna Optimization deployment.
The content of the invention
For overcome the deficiencies in the prior art, the present invention proposes a kind of RFID antenna deployment system monitored in real time for warehouse
System and method, pass through SIR between the radio coverage of RFID antenna, RFID antenna, the finger of RFID antenna load capacity
Mark factor normalizing to quantify and optimize, realize the RFID antenna Optimization deployment that warehouse monitors in real time.
To achieve the above object, the first aspect of the present invention, there is provided of the present invention a kind of in real time to be monitored for warehouse
RFID antenna deployment system include shelf 1, RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4, RFID days
Line 5, photoelectric sensor 6；
The storage rack of lamination that described shelf 1 are at least two layers storage commodity, for dispose RFID reader 2,
GPIO Box conversion and controls case 3, wireless router 4, RFID antenna 5, photoelectric sensor 6；
Described RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4 are deployed in the first layer goods of shelf 1
The top surface of frame；
Described RFID antenna 5 is deployed in the upper side of each interlayer framework of shelf 1 with the degree of tilt β of setting；It is described
Photoelectric sensor 6 be deployed in shelf 1 each interlayer framework both sides, wherein,
RFID antenna 5 is connected with RFID reader 2 by cable, during test, posts the product placement of RFID label tag in goods
On shelf among each interlayer framework of frame 1, RFID reader 2 identifies that the RFID being pasted onto on product is marked by RFID antenna 5
Label, the height residing in each interlayer framework of RFID antenna 5, position, angle are adjusted, obtain optimal identification energy valve
Value, using this energy threshold as judge RFID antenna 5 whether be optimal deployed position foundation.
To achieve the above object, the present invention also provides a kind of RFID antenna dispositions method monitored in real time for warehouse, bag
Include following steps：
Step 1：By shelf 1, RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4, RFID antenna 5,
Photoelectric sensor 6 is arranged into the application environment in warehouse；
Step 2：The area to be monitored of warehouse shelf 1 is set, each RFID antenna 5 is set and selects with respect to each with shelf 1
The initial value range of height, position, angle on interlayer framework；
Step 3：It is determined that the overlay area index of each each interlayer inframe of the radiofrequency signal of RFID antenna 5, RFID antenna 5 it
Between the balanced index that loads of the index of RF signal to interface ratio rate, RFID antenna 5, and by the radio coverage of RFID antenna 5
Index, the signal interference index of RFID antenna 5, the index normalized of the load capacity of RFID antenna 5；It is specific as follows：
Step 3-1：If each radiofrequency signal of RFID antenna 5 is in the coverage rate index letter of the overlay area of each interlayer inframe
Number, is designated as f1, its coverage rate target function maximum is calculated, calculating formula is：
max f1=Ncoverage/|St| (1)
Wherein, NcoverageBe it is all by the radio frequency of RFID antenna 5 cover label, StThe matrix being made up of RFID label tag t；
SrThe matrix being made up of RFID antenna r, | St| for RFID label tag sum；
Described RFID label tag sum, expression formula are：
Wherein, SrThe matrix being made up of RFID antenna r, Cv(r) it is label that signal is received from RFID antenna r,
The described RFID label tag that signal is received from RFID antenna r, its expression formula are：
Wherein, r be shelf 1 in each interlayer inframe RFID antenna, StThe matrix being made up of RFID label tag t, Pr,tFor
The signal strength that RFID label tag t receives from RFID antenna r；PqThe reception energy valve to be communicated for RFID reader 2 and RFID label tag
Value；For any one RFID antenna, r ' is other antennas outside RFID antenna r；
Step 3-2：If the index letter of RF signal to interface ratio rate between each any two RFID antennas 5 of interlayer inframe
Number, is designated as f2, RF signal to interface ratio rate target function maximum is calculated, its calculating formula is：
max f2=Σr∈St(Cdr,t/(Cdr,t+γ(t)))/|St| (4)
Wherein, Cdr,tAll antenna r signal strength sums nearby are received by label t for one, | St| marked for RFID
Label sum, γ (t) is label t interference signal levels of conflicts；
Described label t interference signal levels of conflict γ (t), its expression formula are：
Wherein, Pr′,tSignal strength for RFID label tag t from RFID antenna r ' receptions, SmFor required for label reception signal
The minimum energy threshold values reached；
The ratio for the general power that bidding label obtain from the power that a RFID antenna obtains with the label from all RFID antennas
For object function, f is designated as2, calculating target function, work as f2During equal to 1, then it is assumed that levels of conflict is optimal, and now, conflict level
Wei 0；
Step 3-3：If the radiofrequency signal load balancing target function of RFID antenna 5 of each interlayer inframe, is designated as f3, calculate
The maximum of the radiofrequency signal load balancing target function of RFID antenna 5, its calculating formula are：
Wherein, | Sr| it is RFID antenna r total numbers, | St| it is label t total numbers, niFor antenna riEnergy loss, work as f3
When maximum is 1, then it is assumed that load balancing rank is optimal；
Step 4：The deployment function of RFID antenna 5 is set, is designated as ξ (S), its expression formula is：
ξ (S)=[maxf1,maxf2,maxf3] (7)
Wherein, S is the deployed position parameter of RFID antenna 5, maxf1For the maximum radio frequency signal coverage rate index of RFID antenna 5
Function；maxf2For the radiofrequency signal maximum interference target function of RFID antenna 5；maxf3For the maximum radio frequency signal load of RFID antenna 5
Balanced target function；
Step 5：Judge the deployment functional value (ξ (S of described r-th of RFID antenna 5r)) whether it is more than the r+1 RFID
The deployment functional value ξ (S of antenna 5r+1), if the deployment functional value ξ (S of r-th of RFID antennar) it is greater than the r+1 RFID days
The deployment functional value ξ (S of line 5r+1), in other words, if ξ (Sr) ＞ ξ (Sr+1), then assert the deployment functional value of r-th of RFID antenna 5
Corresponding RFID antenna disposes r-th of location parameter better than RFID days corresponding to the deployment functional value of the r+1 RFID antenna 5
The location parameter of line deployment r+1, then judged by the increasing order of above-mentioned position, until obtaining RFID antenna deployment letter
The location parameter that RFID antenna corresponding to several maximums is disposed, the location parameter of the corresponding RFID antenna deployment is RFID days
The optimal location parameter of line deployment, goes to step 6, otherwise return to step 3；
Step 6：The optimal location parameter of RFID antenna deployment according to step 4, by RFID antenna 5, photoelectric sensing
Device 6 is respectively deployed on shelf 1, and RFID reader 2 is connected with RFID antenna 5, obtain 5 optimal deployment of RFID antenna position and
Angle.
A kind of RFID antenna deployment system monitored in real time for warehouse and method of the present invention has compared with prior art
Some beneficial effects are：
(1) the RFID antenna deployment system can be changed according to warehouse field application environment to RFID reader, GPIO Box
Control cabinet, wireless router are installed on the optimal deployment of shelf top layer, can guarantee that normal warehouse material flows automation running, work as photoelectric transfer
Sensor 6 is detected when having material on warehouse compartment, is converted into control signal by GPIO Box conversion and control casees and is sent to read write line, makes day
Line is now working condition；When a certain warehouse compartment is without material, affiliated read write line and antenna are all resting state, to reach control
The purpose of read write line working condition, energy resource consumption and electromagnetic pollution are reduced with this, the signal interference for reducing adjacent warehouse compartment.
(2) the RFID dispositions methods, the disposition optimization of RFID antenna can be realized, warehouse band monitored area is maximized and covered
Lid, solve RFID reader radiofrequency signal it is overlapping caused by read write line conflict and the problems such as label collision.
Brief description of the drawings
Fig. 1 is a kind of RFID antenna deployment system schematic diagram monitored in real time for warehouse provided by the invention.
Fig. 2 RFID antenna dispositions method flow charts.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with instantiation, and with reference to attached
Figure, is further elaborated on to the present invention.
As shown in figure 1, Fig. 1 is a kind of RFID antenna deployment system schematic diagram monitored in real time for warehouse,
Including shelf 1, RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4, RFID antenna 5, photoelectricity
Sensor 6；
The storage rack of lamination that described shelf 1 are at least two layers storage commodity, for dispose RFID reader 2,
GPIO Box conversion and controls case 3, wireless router 4, RFID antenna 5, photoelectric sensor 6, wherein,
Described RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4 are deployed in the first layer goods of shelf 1
The top surface of frame；
Described RFID antenna is deployed in the upper side of each interlayer framework of shelf 1 with the degree of tilt β set；
Described photoelectric sensor 6 is deployed in the both sides of each interlayer framework of shelf 1；
RFID antenna 5 is connected with RFID reader 2 by cable, during test, posts the product placement of RFID label tag in goods
On shelf among each interlayer framework of frame 1, RFID reader 2 identifies that the RFID being pasted onto on product is marked by RFID antenna 5
Label, the height residing in each interlayer framework of RFID antenna 5, position, angle are adjusted, obtain optimal identification energy valve
Value, using this energy threshold as judge RFID antenna 5 whether be optimal deployed position foundation.
As shown in figure 1, the photoelectric sensor 6 is fixed on every layer of goods yard, there is thing when photoelectric sensor 6 is detected on warehouse compartment
During material, control signal is converted into by GPIO Box conversion and controls case 3 and is sent to read write line 2, it is now working condition to make antenna；
When a certain warehouse compartment is without material, affiliated RFID reader 2 and RFID antenna 5 are resting state, to reach control RFID read-write
The working condition of device 2.
As shown in Fig. 2 Fig. 2 is to make a kind of RFID antenna dispositions method stream monitored in real time for warehouse provided by the invention
Cheng Tu, the system disposed using RFID antenna of the present invention realize that RFID antenna dispositions method comprises the following steps：
Step 1：By shelf 1, RFID reader 2, GPIO Box conversion and controls case 3, wireless router 4, RFID antenna 5,
Photoelectric sensor 6 is arranged into the application environment in warehouse；
Step 2：Set warehouse shelf 1 area to be monitored, set each RFID antenna selection it is relative with shelf 1 it is each every
Height, position, the initial value range of angle on layer framework, for example, being highly that h, position are (x, y, z), angle beta on interlayer framework
The location parameter R (x, y, z, β) of antenna is represented for (0~90 °) initial value, wherein x is abscissa of the antenna in overlay area,
Y is ordinate, and β is the parameter of antenna direction；
Step 3：It is determined that between the overlay area index of each interlayer inframe of each RFID antenna radiofrequency signal, RFID antenna
The index of RF signal to interface ratio rate, the balanced index of RFID antenna load, and by the finger of the radio coverage of RFID antenna
Mark, aerial signal interference index, the index normalized of antenna load amount；It is specific as follows：
Step 3-1：If each RFID antenna radiofrequency signal is in the coverage rate index letter of the overlay area of each interlayer inframe
Number, is designated as f1, its coverage rate target function maximum is calculated, calculating formula is：
max f1=Ncov erage/|St| (1)
Wherein, Ncov erageIt is all labels covered by RFID antenna radio frequency, StThe matrix being made up of RFID label tag t,
SrThe matrix being made up of RFID antenna r, | St| for RFID label tag sum；
Described RFID label tag sum, expression formula are：
Wherein, SrThe matrix being made up of RFID antenna r, Cv(r) it is label that signal is received from antenna r；
The described RFID label tag that signal is received from RFID antenna r, its expression formula are：
Wherein, r be shelf 1 in each interlayer inframe RFID antenna, StThe matrix being made up of RFID label tag t, Pr,tFor
The signal strength that RFID label tag t receives from RFID antenna r；PqThe reception energy valve to be communicated for RFID reader and RFID label tag
Value；For any one RFID antenna, r ' is other antennas outside RFID antenna r；
Step 3-2：If the target function of RF signal to interface ratio rate between each any two RFID antennas of interlayer inframe,
It is designated as f2, RF signal to interface ratio rate target function maximum is calculated, its calculating formula is：
max f2=Σr∈St(CdR, t/(CdR, t/(CdR, t+γ(t)))/|St| (4)
Wherein, Cdr,tAll antenna r signal strength sums nearby are received by label t for one, | St| marked for RFID
Label sum, γ (t) is label t interference signal levels of conflicts；
Described label t interference signal levels of conflict γ (t), its expression formula are：
γ (t)=Σ (Pr′,t-Sm),Cdr,t≥Pr′,t≥Sm (5)
Wherein, Pr′,tSignal strength for RFID label tag t from RFID antenna r ' receptions, SmFor required for label reception signal
The minimum energy threshold values reached；
The ratio for the general power that bidding label obtain from the power that a RFID antenna obtains with the label from all RFID antennas
For object function, f is designated as2, calculating target function, work as f2During equal to 1, then it is assumed that levels of conflict is optimal, and now, conflict level
Not Wei 0, for example, when RFID label tag is located at 2 covering overlapping area of RFID reader, if RFID tag signal
Cd can be less thanr,t, then show that the signal that the RFID label tag t that RFID reader r is covered is received is Optimal Signals, and be more than
The required energy threshold S of RFID label tag communicationm；
Step 3-3：If the RFID antenna radiofrequency signal load balancing target function of each interlayer inframe, is designated as f3, calculate
The maximum of RFID antenna radiofrequency signal load balancing target function, its calculating formula are：
Wherein, | Sr| it is RFID antenna r total numbers, | St| it is label t total numbers, niFor antenna riEnergy loss, work as f3
When maximum is 1, then it is assumed that load balancing rank is optimal；
Step 4：The deployment function of RFID antenna is set, is designated as ξ (S), its expression formula is：
ξ (S)=[maxf1,maxf2,maxf3] (7)
Wherein, S is RFID antenna deployed position parameter, maxf1For RFID antenna maximum radio frequency signal coverage rate index letter
Number；maxf2For RFID antenna radiofrequency signal maximum interference target function；maxf3It is balanced for RFID antenna maximum radio frequency signal load
Target function；
Step 5：Judge the deployment functional value (ξ (S of r-th described of RFID antennar)) whether it is more than the r+1 RFID days
The deployment functional value ξ (S of liner+1), if the deployment functional value ξ (S of r-th of RFID antennar) it is greater than the r+1 RFID antenna
Deployment functional value ξ (Sr+1), in other words, if ξ (Sr) ＞ ξ (Sr+1), then assert that the deployment functional value of r-th of RFID antenna is corresponding
RFID antenna dispose r-th of location parameter better than RFID antenna portion corresponding to the deployment functional value of the r+1 RFID antenna
The location parameter of r+1 is affixed one's name to, then is judged by the increasing order of above-mentioned position, until obtaining RFID antenna deployment function
The location parameter that RFID antenna corresponding to maximum is disposed, the location parameter of the corresponding RFID antenna deployment is RFID antenna portion
The optimal location parameter of administration, goes to step 6, otherwise return to step 3；
Step 6：The optimal location parameter of RFID antenna deployment according to step 4, by RFID antenna 5, photoelectric sensing
Device 6 is respectively deployed on shelf 1, and RFID reader 2 is connected with RFID antenna 5, obtain the optimal deployment of RFID antenna position and
Angle.
Claims (2)
- A kind of 1. RFID antenna deployment system monitored in real time for warehouse, it is characterised in that the system include shelf (1), RFID reader (2), GPIO Box conversion and controls casees (3), wireless router (4), RFID antenna (5), photoelectric sensor (6),The storage rack of lamination that described shelf (1) are at least two layers storage commodity, for dispose RFID reader (2), GPIO Box conversion and controls casees (3), wireless router (4), RFID antenna (5), photoelectric sensor (6), described RFID read-write Device (2), GPIO Box conversion and controls casees (3), wireless router (4) are deployed in the top surface of shelf (1) first layer shelf；Described RFID antenna (5) is deployed in the upper side of each interlayer framework of shelf (1) with the degree of tilt β of setting；Described photoelectric sensing Device (6) is deployed in the both sides of each interlayer framework of shelf (1), wherein,RFID antenna (5) is connected with RFID reader (2) by cable, during test, posts the product placement of RFID label tag in goods On shelf among each interlayer framework of frame (1), RFID reader (2) is pasted onto on product by RFID antenna (5) identification RFID label tag, RFID antenna (5) height residing in each interlayer framework, position, angle are adjusted, obtain optimal knowledge Other energy threshold, using this energy threshold as judge RFID antenna (5) whether be optimal deployed position foundation,The photoelectric sensor (6) is fixed on every layer of goods yard, when having material on photoelectric sensor (6) detection warehouse compartment, is passed through GPIO Box conversion and controls casees (3) are converted into control signal and are sent to RFID reader (2), and it is work shape to make RFID antenna (5) State, when a certain warehouse compartment is without material, affiliated RFID reader (2) and RFID antenna (5) are resting state.
- 2. a kind of RFID antenna dispositions method monitored in real time for warehouse, is used for warehouse using one kind described in claim 1 The RFID antenna deployment system monitored in real time is disposed, it is characterised in that is comprised the following steps：Step 1：By shelf (1), RFID reader (2), GPIO Box conversion and controls casees (3), wireless router (4), RFID days Line (5), photoelectric sensor (6) are arranged into the application environment in warehouse；Step 2：Warehouse shelf (1) area to be monitored is set, it is relative every with shelf (1) to set each RFID antenna (5) selection Height, position, the initial value range of angle on one interlayer framework；Step 3：It is determined that the overlay area index of each each interlayer inframe of RFID antenna (5) radiofrequency signal, RFID antenna (5) it Between RF signal to interface ratio rate index, the balanced index of RFID antenna (5) load, and the radio frequency of RFID antenna (5) is covered Index, RFID antenna (5) signal interference index, the index normalized of RFID antenna (5) load capacity in region；Specifically such as Under：Step 3-1：If each RFID antenna (5) radiofrequency signal is in the coverage rate index letter of the overlay area of each interlayer inframe Number, is designated as f1, its coverage rate target function maximum is calculated, calculating formula is：max f1=Ncoverage/|St| (1)Wherein, NcoverageBe it is all by RFID antenna (5) radio frequency cover label, StThe matrix being made up of RFID label tag t, Sr The matrix being made up of RFID antenna r, | St| for RFID label tag sum；Described RFID label tag sum, expression formula are：<mrow> <msub> <mi>S</mi> <mi>t</mi> </msub> <mo>=</mo> <munder> <mo>&Sigma;</mo> <mrow> <mi>r</mi> <mo>&Element;</mo> <msub> <mi>S</mi> <mi>r</mi> </msub> </mrow> </munder> <msub> <mi>C</mi> <mi>v</mi> </msub> <mrow> <mo>(</mo> <mi>r</mi> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>Wherein, SrThe matrix being made up of RFID antenna r, Cv(r) it is label that signal is received from RFID antenna r；The described RFID label tag that signal is received from RFID antenna r, its expression formula are：<mrow> <msub> <mi>C</mi> <mi>v</mi> </msub> <mrow> <mo>(</mo> <mi>r</mi> <mo>)</mo> </mrow> <mo>=</mo> <mo>{</mo> <mi>t</mi> <mo>&Element;</mo> <msub> <mi>S</mi> <mi>t</mi> </msub> <mo>|</mo> <msub> <mi>P</mi> <mrow> <mi>r</mi> <mo>,</mo> <mi>t</mi> </mrow> </msub> <mo>&GreaterEqual;</mo> <msub> <mi>R</mi> <mi>q</mi> </msub> <mo>,</mo> <mo>&ForAll;</mo> <msup> <mi>r</mi> <mo>&prime;</mo> </msup> <mo>&Element;</mo> <msub> <mi>S</mi> <mi>r</mi> </msub> <mo>,</mo> <msup> <mi>r</mi> <mo>&prime;</mo> </msup> <mo>&NotEqual;</mo> <mi>r</mi> <mo>,</mo> <msub> <mi>P</mi> <mrow> <mi>r</mi> <mo>,</mo> <mi>t</mi> </mrow> </msub> <mo>&GreaterEqual;</mo> <msub> <mi>P</mi> <mrow> <msup> <mi>r</mi> <mo>&prime;</mo> </msup> <mo>,</mo> <mi>t</mi> </mrow> </msub> <mo>}</mo> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow>Wherein, r be shelf (1) in each interlayer inframe RFID antenna, StThe matrix being made up of RFID label tag t, Pr,tFor The signal strength that RFID label tag t receives from RFID antenna r；RqThe reception energy to be communicated for RFID reader (2) and RFID label tag Threshold values；For any one RFID antenna, r ' is other antennas outside RFID antenna r；Step 3-2：If the target function of RF signal to interface ratio rate between each any two RFID antennas (5) of interlayer inframe, It is designated as f2, RF signal to interface ratio rate target function maximum is calculated, its calculating formula is：<mrow> <mi>max</mi> <mi> </mi> <msub> <mi>f</mi> <mn>2</mn> </msub> <mo>=</mo> <msub> <mi>&Sigma;</mi> <mrow> <mi>r</mi> <mo>&Element;</mo> <msub> <mi>S</mi> <mi>t</mi> </msub> </mrow> </msub> <mrow> <mo>(</mo> <msub> <mi>Cd</mi> <mrow> <mi>r</mi> <mo>,</mo> <mi>t</mi> </mrow> </msub> <mo>/</mo> <mo>(</mo> <mrow> <msub> <mi>Cd</mi> <mrow> <mi>r</mi> <mo>,</mo> <mi>t</mi> </mrow> </msub> <mo>+</mo> <mi>&gamma;</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mo>)</mo> <mo>)</mo> </mrow> <mo>/</mo> <mo>|</mo> <msub> <mi>S</mi> <mi>t</mi> </msub> <mo>|</mo> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>4</mn> <mo>)</mo> </mrow> </mrow>Wherein, Cdr,tAll antenna r signal strength sums nearby are received by label t for one, | St| it is total for RFID label tag Number, γ (t) is label t interference signal levels of conflicts；Described label t interference signal levels of conflict γ (t), its expression formula are：γ (t)=∑ (Pr′,t-Sm),Cdr,t≥Pr′,t≥Sm (5)Wherein, Pr′,tSignal strength for RFID label tag t from RFID antenna r ' receptions, SmTo reach required for label reception signal Minimum energy threshold values；The ratio for the general power that bidding label obtain from the power that a RFID antenna obtains with the label from all RFID antennas is mesh Scalar functions, it is designated as f2, calculating target function, work as f2During equal to 1, then it is assumed that levels of conflict is optimal, and now, levels of conflict is 0；Step 3-3：If RFID antenna (5) radiofrequency signal load balancing target function of each interlayer inframe, is designated as f3, calculate The maximum of RFID antenna (5) radiofrequency signal load balancing target function, its calculating formula are：<mrow> <mi>max</mi> <mi> </mi> <msub> <mi>f</mi> <mn>3</mn> </msub> <mo>=</mo> <mo>-</mo> <msubsup> <mi>&Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mrow> <mo>|</mo> <msub> <mi>S</mi> <mi>r</mi> </msub> <mo>|</mo> </mrow> </msubsup> <mrow> <mo>(</mo> <msub> <mi>n</mi> <mi>i</mi> </msub> <mo>/</mo> <mo>|</mo> <msub> <mi>S</mi> <mi>t</mi> </msub> <mo>|</mo> <mo>)</mo> </mrow> <mi>l</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>n</mi> <mi>i</mi> </msub> <mo>/</mo> <mo>|</mo> <msub> <mi>S</mi> <mi>t</mi> </msub> <mo>|</mo> <mo>)</mo> </mrow> <mo>/</mo> <mi>l</mi> <mi>n</mi> <mrow> <mo>(</mo> <mo>|</mo> <msub> <mi>S</mi> <mi>r</mi> </msub> <mo>|</mo> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>6</mn> <mo>)</mo> </mrow> </mrow>Wherein, | Sr| it is RFID antenna r total numbers, | St| it is label t total numbers, niFor antenna riEnergy loss, work as f3It is maximum Be worth for 1 when, then it is assumed that load balancing rank is optimal；Step 4：The deployment function of RFID antenna (5) is set, is designated as ξ (S), its expression formula is：ξ (S)=[maxf1,maxf2,maxf3] (7)Wherein, S is RFID antenna (5) deployed position parameter, maxf1For RFID antenna (5) maximum radio frequency signal coverage rate index letter Number；maxf2For RFID antenna (5) radiofrequency signal maximum interference target function；maxf3Born for RFID antenna (5) maximum radio frequency signal Carry balanced target function；Step 5：Judge the deployment functional value (ξ (S of described r-th of RFID antenna (5)r)) whether it is more than the r+1 RFID antenna (5) deployment functional value ξ (Sr+1), if ξ (Sr) ＞ ξ (Sr+1), then assert that the deployment functional value of r-th of RFID antenna (5) is corresponding RFID antenna dispose r-th of location parameter better than RFID antenna corresponding to the deployment functional value of the r+1 RFID antenna (5) The location parameter of r+1 is disposed, then is judged by the increasing order of above-mentioned position, until obtaining RFID antenna deployment function Maximum corresponding to RFID antenna deployment location parameter, the location parameter of corresponding RFID antenna deployment is RFID antenna The optimal location parameter of deployment, goes to step 6, otherwise return to step 3；Step 6：The optimal location parameter of RFID antenna deployment according to step 4, by RFID antenna (5), photoelectric sensor (6) it is respectively deployed on shelf (1), RFID reader (2) is connected with RFID antenna (5), obtains RFID antenna (5) optimal deployment Position and angle.
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| CN107153800B (en) * | 2017-05-04 | 2020-01-10 | 天津工业大学 | Reader antenna optimized deployment method suitable for UHFRFID positioning system |
| CN108010203A (en) * | 2018-01-24 | 2018-05-08 | 四川爱创科技有限公司 | Automatic saler system based on near-field communication technology |
| CN112306865B (en) * | 2020-10-23 | 2022-01-14 | 北京智芯微电子科技有限公司 | Reader-writer antenna debugging method and reader-writer antenna debugging device based on radio frequency door |
| CN112733986A (en) * | 2020-12-24 | 2021-04-30 | 广东爱码科技股份有限公司 | Device for checking equipment materials of fire engine |
| CN113435221A (en) * | 2021-07-13 | 2021-09-24 | 北京京东乾石科技有限公司 | Control method and device for placing articles, warehouse and warehouse checking method |
| CN116562315A (en) * | 2023-03-28 | 2023-08-08 | 中国长江电力股份有限公司 | Full-surrounding type RFID batch sensing door |
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