CN104881624A - Radio frequency identification RFID apparatus, method and optical distribution network ODN equipment - Google Patents
Radio frequency identification RFID apparatus, method and optical distribution network ODN equipment Download PDFInfo
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Abstract
The invention provides a radio frequency identification RFID apparatus, a method and a piece of optical distribution network ODN equipment. The radio frequency identification RFID apparatus comprises at least two radio frequency antennas coated with radio frequency labels and an RFID control unit for controlling the reading of radio frequency labels. Shielding units are filled between at least two radio frequency antennas. The shielding units are used for isolating interference between the radio frequency antennas. By means of the invention, the problem in the prior art that mistaken reading of RFID radio frequency labels cannot be effectively prevented is solved. The accuracy of detecting radio frequency labels on fibers can be effectively improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of radio frequency discrimination RFID device, method and Optical Distribution Network ODN equipment.
Background technology
In intelligent wireless Optical Distribution Network (Optical Distribution Network, referred to as ODN) equipment, use the electronic tag based on radio-frequency (RF) identification (Radio Frequency IDentification, referred to as RFID) technology.Fig. 1 is intelligent wireless Optical Distribution Network structural representation in correlation technique, and as shown in Figure 1, row's optical fiber flange is installed in apparatus front panel position.Designing antenna on equipment veneer below flange.Fixed placement RFID on fiber connector in ODN.Write specified data in advance inside RFID label tag, show ODN apparatus optical fiber distribution information.When fiber connector inserts flange, aerial radiation scope on equipment veneer comprises radio-frequency (RF) tag, RFID control module switches poll by the antenna on veneer, and the data in contactless reading radio-frequency (RF) tag, understand the information such as the optical fiber distributing table in current ODN equipment.In some moment, on ODN equipment veneer, RFID control module is only switched to a wherein road feeder, then this antenna is applied in excitation, RFID control module to be coupled interaction data by the inductive coupling between the antenna on veneer and the antenna in radio-frequency (RF) tag or electromagnetic backscatter, thus knows the data stored in RFID tag.Label is arranged in a row in the practical application of intelligent ODN equipment, apart from one another by relatively fixing and very little.If because interval is large, it is just few that the flange on ODN veneer can hold quantity, is unfavorable for improving the ALARA Principle fiber capacity on every block veneer.So radio-frequency (RF) tag mutually between interval little, when RFID control module only wishes the data reading radio-frequency (RF) tag N, but also likely the data of radio-frequency (RF) tag N-1 or radio-frequency (RF) tag N+1 be also read simultaneously.
The such communication form of similar intelligent wireless ODN equipment can be summarized as: in the reading range of a RFID control module, there is multiple radio-frequency (RF) tag transponder, the data stream that control module sends is received by multiple transponder sometimes.Multiple transponder transmits data to control module simultaneously, is called multiple-access communication.If just there will be communication contention aware when having two or more transponder to reply data like this and data interfere with each other (collision) simultaneously.Whether, in the standards such as existing ISO15693, conflict in replying at the same time for multiple label, be judged by the decoding situation of data encoding in Frame.Pulse burst region is added in the reply Frame of patent 200610152279.0 before tag transponder access RFID control module, adopt leading random pulses collision detection method, can detect more accurately multiple labels data collision, and the number of tags that data collision occurs is provided.In addition, published also have ALOHA network (Additive Links Online Hawaii Area, referred to as ALOHA) the anti-collision algorithm agreement of algorithm, CDMA slotted ALOHA algorithm, dynamic slot ALOHA algorithm, binary search algorithm etc., but all can not solve a RFID control module in intelligent wireless ODN equipment and misread the problem that one or more close on label.And, because the optical fiber on ODN equipment will support any plug, change position, whether the method for unique identifier (Unique Identifier, referred to as UID) in traditional judgement radio-frequency (RF) tag therefore can't be relied on to identify in two or more labels read is the label wishing to read.
Therefore, can not effectively prevent RFID tag from misreading in the related.
Summary of the invention
The invention provides a kind of radio frequency discrimination RFID device, method and Optical Distribution Network ODN equipment, at least to solve the problem that can not effectively prevent RFID tag from misreading in correlation technique.
According to an aspect of the present invention, provide a kind of radio frequency discrimination RFID device, comprise: at least two cover the radio-frequency antenna of radio-frequency (RF) tag and the RFID control module for controlling radio-frequency (RF) tag reading, screen unit is filled between described at least two radio-frequency antennas, wherein, described screen unit is for isolating the interference between described radio-frequency antenna.
Preferably, described screen unit be following one of at least: the metal flat on the printing board PCB base material of the described radio-frequency antenna of carrying; The metal flat of radome is installed.
Preferably, described metal flat is Copper Foil.
Preferably, the shape of described metal flat is rectangle.
Preferably, the as a whole can of described screen unit.
According to a further aspect in the invention, provide a kind of Optical Distribution Network ODN equipment, comprise the device described in above-mentioned any one.
According to also one side of the present invention, provide a kind of radio frequency discrimination RFID disposal route, comprising: determine that the screen unit between radio-frequency antenna isolates the isolation disturbed between described radio-frequency antenna; According to the described isolation adjustment determined for controlling the radio-frequency antenna power of the RFID control module of radio-frequency (RF) tag reading; Radio-frequency (RF) identification process is carried out according to the described radio-frequency (RF) identification power after adjustment.
Preferably, the described screen unit determining between described radio-frequency antenna is isolated the described isolation disturbed between described radio-frequency antenna and is comprised: when not having described screen unit between described radio-frequency antenna, is that radio-frequency antenna to be measured applies excitation; Detect the electric field energy affecting the radio-frequency antenna adjacent with described radio-frequency antenna to be measured after applying excitation; Determine that the described screen unit between described radio-frequency antenna isolates the described isolation disturbed between described radio-frequency antenna according to the described electric field energy detected.
In accordance with a further aspect of the present invention, provide a kind of radio frequency discrimination RFID treating apparatus, comprising: determination module, for determining that the screen unit between radio-frequency antenna isolates the isolation disturbed between described radio-frequency antenna; Adjusting module, for adjusting the power of described radio-frequency antenna according to the described isolation determined; Processing module, for carrying out radio-frequency (RF) identification process according to the power of the described radio-frequency antenna after adjustment.
Preferably, described determination module comprises: applying unit, for not having described screen unit between described radio-frequency antenna, is that radio-frequency antenna to be measured applies excitation; Detecting unit, for detecting the electric field energy having influence on the adjacent radio frequency antenna of described radio-frequency antenna to be measured after described radio-frequency antenna to be measured applies excitation; According to the described electric field energy detected, determining unit, for determining that the described screen unit between described radio-frequency antenna isolates the described isolation disturbed between described radio-frequency antenna.
Pass through the present invention, adopt radio frequency discrimination RFID device, comprise: at least two cover the radio-frequency antenna of radio-frequency (RF) tag and the RFID control module for controlling radio-frequency (RF) tag reading, screen unit is filled between described at least two radio-frequency antennas, wherein, described screen unit, for isolating the interference between described radio-frequency antenna, solves in correlation technique and can not effectively prevent RFID tag from misreading, and then reaches the effect effectively improving the radio-frequency (RF) tag recognition accuracy on optical fiber.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is intelligent wireless Optical Distribution Network structural representation in correlation technique;
Fig. 2 is the structured flowchart of the radio frequency discrimination RFID device according to the embodiment of the present invention;
Fig. 3 is the structural representation of the Optical Distribution Network ODN equipment according to the embodiment of the present invention;
Fig. 4 is the process flow diagram of the radio frequency discrimination RFID method according to the embodiment of the present invention;
Fig. 5 is the structured flowchart of the radio frequency discrimination RFID device according to the embodiment of the present invention;
Fig. 6 is the preferred structure block diagram of determination module 52 in the radio frequency discrimination RFID device according to the embodiment of the present invention;
Fig. 7 is system hardware structure block diagram according to the preferred embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Provide a kind of radio frequency discrimination RFID device in the present embodiment, Fig. 2 is the structured flowchart of the radio frequency discrimination RFID device according to the embodiment of the present invention, as shown in Figure 2, this device comprises: at least two cover the radio-frequency antenna 22 of radio-frequency (RF) tag and the RFID control module 24 for controlling radio-frequency (RF) tag reading, screen unit 26 is filled between at least two radio-frequency antennas, wherein, screen unit 26 is for isolating the interference between radio-frequency antenna.
By the radio frequency discrimination RFID device of above-mentioned framework, namely fill for isolating the screen unit disturbed between radio-frequency antenna between radio-frequency antenna, the antenna reading range of RFID control module is made only to be confined to two screen unit zone lines, not only solving in correlation technique effectively to prevent RFID tag from misreading, and then reaches the effect effectively improving the radio-frequency (RF) tag recognition accuracy on optical fiber.
This screen unit can adopt various ways, and such as, this screen unit can be the metal flat on the printing board PCB base material of carrying radio-frequency antenna; The metal flat of radome also can be installed.Wherein, this metal flat can be Copper Foil, can certainly be other metal material, such as, and iron, aluminium etc.The shape of metal flat also can be multiple, preferably, can be rectangle.In addition, in order to good protected effect, this screen unit can as a whole can; such as; in order to good shielding protection effect, this screen unit can as a whole can, namely surrounds radio-frequency antenna both sides and surrounded rectangular parallelepiped above by the metal flat of three pieces of sheets.
In the another aspect of the present embodiment, additionally provide a kind of Optical Distribution Network ODN equipment, Fig. 3 is the structural representation of the Optical Distribution Network ODN equipment according to the embodiment of the present invention, and as shown in Figure 3, this ODN equipment 32 comprises the radio frequency discrimination RFID device 34 of above-mentioned any one.
In the present embodiment, additionally provide a kind of radio frequency discrimination RFID method, Fig. 4 is the process flow diagram of the radio frequency discrimination RFID method according to the embodiment of the present invention, and as shown in Figure 4, this flow process comprises the steps:
Step S402, determines the isolation disturbed between the screen unit isolation radio-frequency antenna between radio-frequency antenna;
Step S404, according to the power of the isolation adjustment radio-frequency antenna determined;
Step S406, the power according to the radio-frequency antenna after adjustment carries out radio-frequency (RF) identification process.
Pass through above-mentioned steps, namely fill for isolating the screen unit disturbed between radio-frequency antenna between radio-frequency antenna, the antenna reading range of RFID control module is made only to be confined to two screen unit zone lines, by determining the isolation between radio-frequency antenna, according to the isolation adjustment radio-frequency antenna power determined, make the isolation effect of screen unit better, not only solving in correlation technique effectively to prevent RFID tag from misreading, and then reaches the effect effectively improving the radio-frequency (RF) tag recognition accuracy on optical fiber.
Preferably, determine that the isolation disturbed between the screen unit isolation radio-frequency antenna between radio-frequency antenna can adopt multiple processing mode, such as, the mode of electric field excitation can be adopted, when there is no screen unit between radio-frequency antenna, for radio-frequency antenna to be measured applies excitation; Detect the electric field energy having influence on the adjacent radio frequency antenna of this radio-frequency antenna to be measured after this radio-frequency antenna to be measured applies excitation; According to the isolation disturbed between the screen unit isolation radio-frequency antenna between this electric field energy determination radio-frequency antenna detected.
Additionally provide a kind of radio frequency discrimination RFID device in the present embodiment, this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, term " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
In the present embodiment, additionally provide a kind of radio frequency discrimination RFID device, Fig. 5 is the structured flowchart of the radio frequency discrimination RFID device according to the embodiment of the present invention, as shown in Figure 5, this device comprises determination module 52, adjusting module 54 and processing module 56, is described below to this device.
Determination module 52, for determining the isolation disturbed between the screen unit isolation radio-frequency antenna between radio-frequency antenna; Adjusting module 54, is connected to above-mentioned determination module 52, for adjusting the power for this radio-frequency antenna according to the isolation determined; Processing module 56, is connected to above-mentioned adjusting module 54, for carrying out radio-frequency (RF) identification process according to the power of the radio-frequency antenna after adjustment.
Fig. 6 is the preferred structure block diagram of determination module 52 in the radio frequency discrimination RFID device according to the embodiment of the present invention, and as shown in Figure 6, this determination module 52 comprises applying unit 62, detecting unit 64 and determining unit 66, is described below to this determination module 52.
Applying unit 62, for not having screen unit between radio-frequency antenna, is that radio-frequency antenna to be measured applies excitation; Detecting unit 64, is connected to above-mentioned applying unit 62, for detecting the electric field energy having influence on the adjacent radio frequency antenna of this radio-frequency antenna to be measured after this radio-frequency antenna to be measured applies excitation; Determining unit 66, is connected to above-mentioned detecting unit 64, for isolating the isolation disturbed between radio-frequency antenna according to the screen unit between the electric field energy determination radio-frequency antenna detected.
By above-described embodiment and preferred implementation, provide a kind of applied environment being adapted at a RFID control module and multiple radio-frequency (RF) tag transponder in intelligent wireless ODN equipment, prevent RFID tag from misreading the method for generation.This RFID label tag misread preventing method, makes intelligent wireless ODN equipment can at a time, read-only to incidental radio-frequency (RF) tag on a desired optical fiber, and reads less than radio-frequency (RF) tag incidental on adjacent fiber.Namely by above-mentioned process, not only effectively improve the intelligence degree of conventional wireless ODN equipment, and improve the radio-frequency (RF) tag recognition accuracy on optical fiber.
Below in conjunction with accompanying drawing, the preferred embodiment for the present invention is described.
Fig. 7 is system hardware structure block diagram according to the preferred embodiment of the present invention, as shown in Figure 7, within the system, except the radio-frequency antenna 72(carrying radio-frequency (RF) tag comprised in correlation technique is with said radio-frequency antenna 22, as the radio-frequency antenna N-1 in Fig. 7, radio-frequency antenna N, radio-frequency antenna N+1), the radio frequency discrimination RFID control module 74(be connected with radio-frequency antenna by feeder and above-mentioned radio-frequency (RF) identification control module 24) outward, also comprise shroud module 72(and above-mentioned screen unit 26), wherein, radio-frequency (RF) tag can keep consistent with conventional wireless ODN device location with the relative position of flange.
It should be noted that, gap between antennas adds shroud module, increases the isolation between antenna.The antenna reading range of RFID control module is made only to be confined to two shroud module zone lines.As the radio-frequency (RF) tag N that hope is read, then when RFID control module is switched to feeder N, RFID control module is connected with antenna N.Due to the shielding action of shroud module, now RFID control module is read-only to radio-frequency (RF) tag N by antenna N, and does not read radio-frequency (RF) tag N-1 and N+1.
Shroud module can adopt various ways, with device signal be connected.Shroud module is typically employed in the rectangular copper foil plane on printed circuit board (PrintedCircuit Board, referred to as PCB) base material or in rectangular copper foil plane, adds the form of shielding sheet.
Compared with intelligent wireless ODN equipment traditional in correlation technique, use the method increasing shroud module, reliably solve the problem that wireless ODN equipment misreads surrounding tags.Improve the accuracy of intelligent ODN recognition of devices radio-frequency (RF) tag, more effectively utilize the fiber resource of ODN distributing frame, save existing fiber and do not make full use of the cost but wanting to use new ODN optical fiber distributing.
In addition, it is pointed out that shroud module increases Copper Foil on veneer PCB substrate surface, shape is generally rectangle.Square surface Copper Foil length is identical with antenna length or close.Square surface Copper Foil width according to the line space design on PCB between antenna, can retain certain interval, directly can not contact with antenna.Also can beat pad on this Copper Foil, radome is installed.Radome is generally sheet form, and vast of heaven line length is identical or close, and distance PCB substrate surface elevation is identical with optical fiber flange height or close.No matter shroud module is only increase Copper Foil on veneer PCB substrate surface, or install sheet radome, effectively can ensure that veneer directional antenna Electric Field Distribution concentrates on the radio-frequency (RF) tag flange region wishing to read.
Because the situation that label is misread appears in present intelligent ODN equipment veneer, therefore Water demand antenna is on the impact of 4 millimeter radio-frequency (RF) tag above adjacent antenna.Therefore the field strength distribution of 4mm above Water demand antenna, thus draw a conclusion.Provide the process of modeling below:
The antenna that modeling three is adjacent in HFSS software, middle antenna adds excitation, and the antenna on both sides does not add excitation.4 millimeters of Electric Field Distribution above antenna.Can be drawn by Computer Simulation, middle antenna electric field energy is at 3.8082*103, and the electric field energy having influence on both sides is 2.3802*103, difference 20log(3.8082/2.3802)=4.1dB.
The antenna that modeling three is adjacent, middle antenna adds excitation, and the antenna on both sides does not add excitation, by the shroud module adding sheet radome form between antenna.4 millimeters of Electric Field Distribution above antenna.Can be drawn by Computer Simulation, middle antenna electric field energy is at 5.6632*103, and the electric field energy having influence on both sides is 1.4158*103, difference 20log(5.6632/1.4158)=12.04dB.
The antenna that modeling three is adjacent, middle antenna adds excitation, and the antenna on both sides does not add excitation.Shroud module adopts overall can form, because veneer is arranged in a can, therefore considers the impact of can multiple antennas field.4 millimeters of Electric Field Distribution above antenna.Can show that middle antenna electric field energy is at 5.2782*103 by Computer Simulation, the electric field energy having influence on both sides is 1.3195*103, difference 20log(5.2782/1.3195)=12.04dB.
Analyze above-mentioned three kinds of situations and can obtain the isolation of antenna with adjacent antenna at about 12dB, if will ensure not misread, then need the power adjusting antenna, the antenna power after adjustment both can not after minimizing 12dB in the scope that label is readable.The power adjustment functions of antenna is completed by radio frequency control module.
Therefore, above-described embodiment and preferred implementation, on the basis of conventional wireless intelligence ODN system, distinguish published RFID anti-collision algorithm, do not rely on the UID in radio-frequency (RF) tag, adopt the measure increasing shroud module, give a kind of method of RFID radio electronic label misread preventing.This method solving conventional wireless ODN system can only anticollision conflict, the wherein current optical fiber label that will read can not be identified, the problem that radio-frequency (RF) tag on optical fiber has certain probability to misread, improves the utilization factor of optical fiber in ODN system, has very large economic worth and market using value.
Said method, not only realizes simple, with low cost, without the need to changing existing ODN vessel flange and optical fiber arrangement relative position, without the need to depending on the UID number in radio-frequency (RF) tag, successful, and the needs meeting intelligent wireless ODN equipment higher.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a radio frequency discrimination RFID device, comprising: at least two covering the radio-frequency antenna of radio-frequency (RF) tag and the RFID control module for controlling radio-frequency (RF) tag reading, it is characterized in that,
Between described at least two radio-frequency antennas, fill screen unit, wherein, described screen unit is for isolating the interference between described radio-frequency antenna.
2. device according to claim 1, is characterized in that, described screen unit be following one of at least:
Metal flat on the printing board PCB base material of the described radio-frequency antenna of carrying;
The metal flat of radome is installed.
3. device according to claim 2, is characterized in that, described metal flat is Copper Foil.
4. device according to claim 2, is characterized in that, the shape of described metal flat is rectangle.
5. device according to claim 1, is characterized in that, the as a whole can of described screen unit.
6. an Optical Distribution Network ODN equipment, is characterized in that, comprises the device according to any one of claim 1 to 5.
7. a radio frequency discrimination RFID method, is characterized in that, comprising:
Determine that the screen unit between radio-frequency antenna isolates the isolation disturbed between described radio-frequency antenna;
The power of described radio-frequency antenna is adjusted according to the described isolation determined;
Power according to the described radio-frequency antenna after adjustment carries out radio-frequency (RF) identification process.
8. method according to claim 7, is characterized in that, the described screen unit determining between described radio-frequency antenna is isolated the described isolation disturbed between described radio-frequency antenna and comprised:
When there is no described screen unit between described radio-frequency antenna, for radio-frequency antenna to be measured applies excitation;
Detect the electric field energy having influence on the adjacent radio frequency antenna of described radio-frequency antenna to be measured after described radio-frequency antenna to be measured applies excitation;
Determine that the described screen unit between described radio-frequency antenna isolates the described isolation disturbed between described radio-frequency antenna according to the described electric field energy detected.
9. a radio frequency discrimination RFID device, is characterized in that, comprising:
Determination module, for determining that the screen unit between radio-frequency antenna isolates the isolation disturbed between described radio-frequency antenna;
Adjusting module, for adjusting the power of described radio-frequency antenna according to the described isolation determined;
Processing module, for carrying out radio-frequency (RF) identification process according to the power of the described radio-frequency antenna after adjustment.
10. device according to claim 9, is characterized in that, described determination module comprises:
Applying unit, for not having described screen unit between described radio-frequency antenna, is that radio-frequency antenna to be measured applies excitation;
Detecting unit, for detecting the electric field energy having influence on the adjacent radio frequency antenna of described radio-frequency antenna to be measured after described radio-frequency antenna to be measured applies excitation;
According to the described electric field energy detected, determining unit, for determining that the described screen unit between described radio-frequency antenna isolates the described isolation disturbed between described radio-frequency antenna.
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| CN201410068864.7A CN104881624A (en) | 2014-02-27 | 2014-02-27 | Radio frequency identification RFID apparatus, method and optical distribution network ODN equipment |
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| CN201410068864.7A CN104881624A (en) | 2014-02-27 | 2014-02-27 | Radio frequency identification RFID apparatus, method and optical distribution network ODN equipment |
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Application publication date: 20150902 |