CN103178337B - Near field read-write antenna and real-time asset management system - Google Patents
Near field read-write antenna and real-time asset management system Download PDFInfo
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- CN103178337B CN103178337B CN201110435972.XA CN201110435972A CN103178337B CN 103178337 B CN103178337 B CN 103178337B CN 201110435972 A CN201110435972 A CN 201110435972A CN 103178337 B CN103178337 B CN 103178337B
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Abstract
The invention discloses a kind of near field read-write antenna and real-time asset management system, ground plane is formed by the first surface on dielectric substrate, and on dielectric substrate second is arranged bending microstripline with electromagnetic coupled mode reading electronic labels, and the database assets information read being sent to control end carries out storage goes forward side by side line pipe reason, read uniformity, group's property read, asset management efficiency in order to reach to improve and control communication distance, reduce the technique effect of environmental impact.
Description
Technical field
The present invention relates to field of antenna, be specifically related to a kind of near field read-write antenna and real-time asset management system.
Background technology
The example of each industrial field application radio-frequency (RF) identification (RadioFrequencyIdentification, RFID) got more and more in recent years, and the application in the middle of the novel business models such as logistics, medical treatment, national defence, traffic, monitoring in real time constantly increases.RFID automatic identification technology is diffused in the middle of various industry scene, manufacturing facility and actual life in the mode of evolving.In the middle of the show stand of stack room, library or food sales field, utilize the intelligent commodity shelf being provided with near field antenna, carry out taking care of books in real time, the circulation resume of institute's display goods and various product information are provided, define a kind of new AC mode with user.
At present concerning the production of enterprise and system maintenance, when considering the quality of material, delivery date, cost, adopting attachment RFID label tag to carry out the real-time management system of parts and material, is a kind of effective scheme to the aspect such as stock's keeping, process resolution, maintenance record management, buying, inspection of material.And, and the importance of strengthening enterprise competitiveness, the logistics management reduced costs and efficient stock control constantly increases.Be the expansion along with asset class and logistics scope, effectively management carried out to assets and also more and more comes into one's own.
Radio frequency operation principle in rfid system mainly can be divided into electromagnetic coupled mode and microwave mode.Wherein, the rfid system of electromagnetic coupled mode is relatively little by the degree of surrounding environment influence, so have metastable characteristic in electronic tag (Tag).The rfid system of this electromagnetic coupled mode, although be not suitable for being applied in remote identification, mobilely the identifying of label, multiple label group the occasion such as to read, be applicable to the identification aspect of intensive (form of trooping) label.And although the rfid system of microwave mode has good advantage in multiple tag identification speed, group's property read, remote identification, massive store etc.But want group to read label intensive in the confined space, then need to affect problem from basic solution Electromagnetic Interference and surrounding enviroment, and there is the system of limited decipherment distance characteristic.According to the rfid system of high frequency (HighFrequency, HF) frequency range electromagnetic coupled mode, because of physical property Boundary Limit, the improvement of its readable decipherment distance is difficult to realize technically.Therefore, have and can get rid of the interference of periphery frequency resource, and the demand that effectively can read hyperfrequency (Ultra-HighFrequency, UHF) the frequency range near field antenna being attached to cabinet equipment label constantly increases.
The input of current various equipment, output and record management are by fixed type reader-writer dedicated channel, or the mode of the single identification equipment of hand-held read-write, if the intensive various equipment put in the management confined space and use the words of the RFID of uhf band, in order to get rid of electromagnetic influencing each other and electromagnetic interference (Electromagneticinterference, EMI), Electro Magnetic Compatibility (ElectromagneticCompatibility, EMC) impact, within needing first the remote radiation field of 900MHz band RFID antenna to be limited in several Cm.But the control in this radiation field has limitation at technical elements.Utilizing absorbing material, metal shielding board or reducing rfid interrogator (being also called near field read-write device) power output etc. adopts the method for supplementary means to be modal solution.The functional requirement of this near field read-write device antenna is that the radiation field within the scope of antenna physical will maintain uniform field distribution, and readable decipherment distance also will be limited within particular range and (is generally several Cm).Meanwhile, for the ease of expansion and exchange, its price is low and will make slim, and, require that there is the impedance bandwidth comprising UHF full frequency band.
Uhf band near field antenna so far, what mainly adopt is simple loop antenna, or changes the manifold type loop antenna of this loop antenna.The shortcoming of this loop antenna is that antenna ground plane separated by a distance could stablize radiation, and when antenna monnolithic case becomes large time, this antenna is not suitable in the middle of application apparatus management.In addition because of the distributional difference in magnetic field between loop antenna periphery and central part, along with the difference of reading and writing device antenna position, also there is obvious difference to the discrimination of electronic tag (or being called for short label).In order to form uniform field distribution in antenna effective area, also someone proposed helical antenna, but the entirety topology of helical antenna is not suitable for being applied to equipment control reading and writing device antenna.
The RFID technique of uhf band utilizes electromagnetic backscattering to identify electronic tag.The arrangement design mode of the uhf band antenna designed according to original far field operation principle, along with the arrangement factor forms the directive property of specific direction, it cannot eliminate electromagnetic interference and diffuse transmission influence at all, so there will be the situation that discrimination obviously reduces.Particularly cannot form the Flat field in antenna effective interface identification field, therefore, according to the difference of RFID antenna ad-hoc location, there is the shortcoming that discrimination sharply declines.
Further, the antenna port of commercial rfid interrogator, by distributor or interchanger, when being arranged in most antenna to use, because of phenomenons such as the mutual interference between antenna, the reflection on periphery object and decay, there is the white space of electronic label identification.Further, when utilizing multiple antenna port of rfid interrogator, there will be that data processing speed is slow and group reads the problems such as decrease in efficiency because of the mutual exchange between port.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of near field read-write antenna and real-time asset management system, Flat field cannot be formed in antenna effective interface identification field to solve current antenna, cause antenna discrimination obviously to reduce and affect the problem of asset management efficiency.
In order to solve the problem, the invention provides a kind of near field read-write antenna device, comprising: dielectric substrate, bending microstripline, input, load resistance and through hole.Wherein, the first surface of dielectric substrate is formed with ground plane; Bend microstripline in order to be arranged on second of dielectric substrate, and with electromagnetic coupled mode reading electronic labels; Input in order to be arranged on the first end of dielectric substrate, and is electrically connected head end and the read write line of bending microstripline; Load resistance in order to be arranged on the second end of dielectric substrate, and is electrically connected the tail end of bending microstripline; And through hole is in order to be electrically connected ground plane and load resistance to form short-circuit loop.
About real-time asset management system of the present invention, comprising: electronic tag, antenna assembly, read write line and control end.Wherein, each electronic tag is arranged at corresponding asset equipment respectively, and described electronic tag stores corresponding assets information; Antenna assembly has bending microstripline, and reads the assets information of described electronic tag in electromagnetic coupled mode; Read write line is electrically connected described antenna assembly, in order to receive the assets information that described antenna assembly reads; And control end is in order to be interconnected by communication interface and read write line, and the assets information that described antenna assembly reads is stored to database for asset management.
Compared with prior art, application the present invention, solve current antenna and cannot form Flat field in antenna effective interface identification field, cause antenna discrimination obviously to reduce and affect the problem of asset management efficiency, ground plane is formed by the first surface on dielectric substrate, and on dielectric substrate second is arranged bending microstripline with electromagnetic coupled mode reading electronic labels, and the database assets information read being sent to control end carry out storage go forward side by side line pipe reason, improve communication distance, group's property read, asset management efficiency, and reduction environmental impact.
Accompanying drawing explanation
Fig. 1 is the oblique view of the antenna assembly of tool of the present invention bending microstripline.
Fig. 2 is the schematic diagram of E-field normal component, tangential component and the absolute value components of application antenna assembly of the present invention in X-Y plane.
Fig. 3 is the schematic diagram of known rectilinear configuration irradiation structure and bending form irradiation structure of the present invention.
Fig. 4 is according to the differing heights from antenna assembly surface, and the two-dimentional near field magnetic field component of antenna assembly has been expressed as the schematic diagram of two-dimentional scalar component form.
Fig. 5 is the schematic diagram that application inventive antenna is installed on the reflection loss value in rack.
Fig. 6 is the schematic diagram in the change of inventive antenna device according to variable height, its readable identification field.
Fig. 7 is the system block diagrams of answering apparatus to bend the real-time asset management system of the antenna assembly of microstripline.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Refer to Fig. 1, Fig. 1 is the oblique view of the antenna assembly of tool of the present invention bending microstripline, and this antenna assembly 10 comprises: dielectric substrate 110, bending microstripline 120, input 130, load resistance 140 and through hole 150.Wherein, the first surface of dielectric substrate 110 is formed with ground plane 111.On reality is implemented, dielectric substrate 110 can be made up of slim single substrate, and it also can be described as base material, sets up conductor line in order to provide.Because dielectric substrate 110 is prior art, therefore much more no longer to repeat at this.
Bend microstripline 120 in order to be arranged on second of dielectric substrate 110, and with electromagnetic coupled mode reading electronic labels (not shown).On reality is implemented, in order to reduce the electric effect of dielectric substrate 110 and realize ultrathin type, described bending microstripline 120 can be co-planar waveguide (co-planarwaveguide, or ground connection co-plane waveguide (GroundedCPW CPW), GCPW) band shape bending irradiation structure body, sinusoidal wave in order to property performance period near field.Described bending microstripline 120 offsets a segment distance in bending place also can be provided with parasitic agent 121, the length of described distance and parasitic agent 121 adjusts according to design variables such as antenna impedance bandwidth and reflection losses, the length of antenna assembly 10 and width then adjust according to the total length of bending microstripline 120, and its adjusting range is expanded to λ/2 from λ/4.Be noted that described antenna assembly 10 is the near field antenna of hyperfrequency (Ultra-HighFrequency, UHF) frequency range especially.
Input 130 in order to be arranged on the first end of dielectric substrate 110, and is electrically connected the bending head end of microstripline 120 and read write line (or claim near field read-write device, not shown in the figures).On reality is implemented, input 130 is connected to read write line by distributor after can being first connected to distributor (not shown) again.Described distributor can be interconnected with the input 130 of multiple antenna assembly 10 simultaneously.
Load resistance 140 in order to be arranged on the second end of dielectric substrate 110, and is electrically connected the tail end of bending microstripline 120.
Through hole 150 is in order to be electrically connected ground plane 111 with load resistance 140 to form short-circuit loop.
On reality is implemented, antenna assembly 10 in the present invention can vertically be arranged on inside rack (not shown) door and window, and has the length (as: about 110cm) being suitable for rack door and window and the suitable width (as: 5 ~ 10cm) can guaranteeing the equipment operator visual field.The apparent size of antenna assembly 10 freely can change according to practical service environment, and the impact of this change on antenna-reflected loss and readable decipherment distance characteristic is less.In addition, consider the installation site in rack and the application on shelf, above-mentioned dielectric substrate 110 is selected formed with slim single substrate.Be noted that slim dielectric electrical quantity, dielectric constant and its thickness are the major parameters determining the micro-bandwidth of antenna assembly 10 especially.
Mention above, bending microstripline 120 is banded bending irradiation structure body, and that is, antenna assembly 10 defines the cascaded structure radiant body of bending form from input 130 to end.The formation of this ' it ' font bending microstripline 120, compared with rectilinear simple micro-band form, the magnetic current distribution in its antenna effective area is wider.Therefore, within the scope of antenna readable range, can guarantee to identify field uniformly.And the standing wave that rectilinear simple micro-band form is formed, periodically shadow region will be there will be, and will the condition being unfavorable for identifying electronic tag be formed in these positions.In addition, by lay be expanded to Y-axis and with main radiator mutually parasitic agent 121 across a certain distance, maintain uniform radiation field and improve the impedance operator of antenna assembly 10.
In more detail, the above-mentioned bending microstripline 120 formed for the purpose of near-field thermal radiation field is made up of following components.One is, to bend the horizontal primary radiation circuit that curve is formed.Two are, separated by a distance with above-mentioned primary radiation circuit, and the parasitic radiation circuit laterally formed.Three are, with the adapter of one end for benchmark, and the periodic structure that two directions are all symmetrical in length and breadth.Utilizing the rack assets real-time management system of near field read-write device antenna (i.e. antenna assembly 10) in the present invention, in order to make it recognize label in the limited range that antennas orthogonal face is certain, being designed to the pattern only worked in limited radial field.Further, the label on each cabinet equipment is attached to, within its attachment position will be selected in antenna assembly 10 horizontal width and in the shortest vertical height (within 5cm).
In addition, the antenna assembly 10 shown in Fig. 1 is the periodic structures being attached to parasitic agent 121.But the present invention does not limit quantity and the form thereof of described parasitic agent 121 with this.Further, between each parasitic agent 121 and interval adjacent with bending microstripline 120 also can be different according to impedance matching condition.The end of antenna assembly 10, defines the short-circuit loop between ground plane 111 by through hole 150.Further, utilize the load resistance 140 with specified impedance, improve the reflection loss characteristic of antenna.
According to embodiment in the present invention, the interval of above-mentioned bending microstripline 120 and the spacing of parasitic agent 121 larger, coupled electric field size will weaken, thus the readable decipherment distance in antennas orthogonal direction will be shortened.Antenna assembly 10 in the present invention can utilize the modes such as two-sided gum, adhesive, screw to be fixed to inside rack door and window.It is specifically intended that the ground plane 111 that installation site will be selected in antenna assembly 10 does not contact the position on rack door and window metal door frame.
Refer to Fig. 2, Fig. 2 is the schematic diagram of E-field normal component, tangential component and the absolute value components of application antenna assembly of the present invention in X-Y plane.Wherein, electric field strength table 200 represents the power of electric field with different lightness, and it is more weak that lightness higher (color is more shallow) represents electric field, otherwise it is stronger that lightness lower (color is darker) then represents electric field.In order to ensure uniform readable identification field, antenna assembly 10 has the bending microstripline 120 of bending morphosis.Further, from X-Y plane E-field normal component 210, the bending place of bending microstripline 120 is in one-period, and direction of an electric field generating period changes, and inspires periodic sinusoidal ripple.Can know the high field seeing that bending microstripline 120 periphery is formed from the tangential component 220 and absolute value components 230 of X-Y plane electric field, and these electric fields do not have obvious field decay from input 130 to the transmission of antenna assembly 10 end.In antenna assembly 10 field, the field distribution of this electric field component expansion and from input 130 to antenna assembly 10 end without the biography ripple phenomenon of obviously decay, ensure that the even readable identification field in antenna assembly 10 interface, further, the independent working mode between adjacent antenna device 10 and EMI/EMC problem is fundamentally solved.
Refer to Fig. 3, Fig. 3 is the schematic diagram of known rectilinear configuration irradiation structure and bending form irradiation structure of the present invention.By rectilinear configuration irradiation structure 310 and bending form irradiation structure 320 in Fig. 3, illustrate magnetic field absolute value composition and the electric field strength in X-Z plane y=0 cross section respectively, and the power of electric field is represented with the different lightness of electric field strength table 300, it is more weak that lightness higher (color is more shallow) represents electric field, otherwise it is stronger that lightness lower (color is darker) then represents electric field.In common rectilinear configuration irradiation structure 310, along with the height phenomenon of the different standing wave field flows of wavelength is obvious, as: 0 degree of phase place Electric Field Distribution 311 and 90 degree of phase place Electric Field Distribution 312 illustrate.But in the middle of bending form irradiation structure 320, compare diffusion along radiation breakdown voltage, as: 0 degree of phase place Electric Field Distribution 321 and 90 degree of phase place Electric Field Distribution 322 illustrate.This Distribution of Magnetic Field in uniform radiation field, and in readable decipherment distance, can guarantee that relatively stable group reads rate.Particularly along antenna assembly 10 interfacial level Z axis, electric field strength (V/m) sharply declines, and electric field dense distribution around antenna assembly 10 interface.Therefore, can confirm compared with general rectilinear configuration irradiation structure 310, in bending form irradiation structure 320 of the present invention, the shadow region of electric field strength is relatively less.
Refer to Fig. 4, Fig. 4 is according to the differing heights from antenna assembly surface, and the two-dimentional near field magnetic field component of antenna assembly has been expressed as the schematic diagram of two-dimentional scalar component form.As shown in Figure 4, centered by X-axle, periodically high field is defined at X-Y plane internal magnetic field component, and, from antenna assembly 10 surface along the z-axis direction, 1Cm magnetic field intensity of being often separated by dies down, wherein, the first component form 410 is highly for signal during 0mm, second component form 420 are highly for signal during 10mm, three-component form 430 are highly for signal during 20mm, the 4th component form 440 are highly for signal during 30mm and the 5th component form 450 are highly signal during 40mm.Known by the actual test of read write line and antenna assembly 10, because of the impact by antenna assembly 10 surface area etc., to guarantee that uniform decipherment distance is for benchmark, the region of more than 5Cm is the readable decipherment distance critical point of magnetic density.
Refer to Fig. 5, Fig. 5 is the schematic diagram that application inventive antenna is installed on the reflection loss value in rack.The input 130 interconnection network analyzer of antenna assembly 10 in the present invention, in order to test the result of reflection loss and to show, the reflection loss in uhf band 0.86GHz to 0.96GHz frequency range is below-20dB.In the emulation experiment of reality, the impedance bandwidth being benchmark with-10dB, in uhf band RFID centre frequency, place ensure that more than 400MHz.Therefore, can confirming when antenna assembly 10 is installed in actual rack, when considering near field effect, also can guarantee sufficient impedance bandwidth.Because the end of antenna assembly in the present invention 10 can the formation such as load resistance 140 and λ/4 open-circuit, therefore achieve wide-band impedance bandwidth.Namely, compared with the impedance bandwidth of the every money electronic tag in the assets be attached in rack, the bandwidth of antenna assembly 10 is wider, and by factors such as be combineding with each other between load resistance 140 and bending microstripline 120 length, parasitic agent 121, control impedance and the reflection loss of antenna assembly 10.
Refer to Fig. 6, Fig. 6 is the schematic diagram in the change of inventive antenna device according to variable height, its readable identification field.In Fig. 6 with the X-Y plane area of antenna assembly 10 for benchmark, according to the change of variable height Z, respectively illustrate readable identification field.When antenna assembly 10 surface location is set to Z=0, in the length and width field of antenna assembly 10, the height actual measurement of stablizing reading electronic labels is 4cm.Further, in the sustained height of antenna assembly 10, the electronic label identification rate departing from the X-Y plane position of antenna assembly 10 amplitude will sharply decline.
Refer to Fig. 7, Fig. 7 is the system block diagrams of answering apparatus to bend the real-time asset management system of the antenna assembly of microstripline, comprising: electronic tag 20, antenna assembly 10, read write line 30 and control end 40.Wherein, each electronic tag 20 is arranged at corresponding asset equipment 21 respectively, and described electronic tag 20 stores corresponding assets information.In other words, interior of equipment cabinet can deposit multiple stage asset equipment 21 by layer, every platform asset equipment 21 is attached with an electronic tag 20, this electronic tag 20 has unique identification code and represents the assets information of equipment and corresponding with the asset equipment title on intrinsic assets inventory, so that the user being positioned at control end 40 can learn its which platform asset equipment 21 corresponding according to the identification code of electronic tag 20.On reality is implemented, electronic tag is the metal label of hyperfrequency (Ultra-HighFrequency, UHF)
Every day, line apparatus 10 all had bending microstripline 120 (referring to Fig. 1), and read the assets information of described electronic tag 20 in electromagnetic coupled mode.Because antenna assembly 10 elaborates in aforementioned, therefore much more no longer to repeat at this.
Read write line 30 is electrically connected described antenna assembly 10, in order to receive the assets information that described antenna assembly 10 reads.On reality is implemented, each rack has an antenna assembly 10, when will follow the trail of the asset equipment of multiple rack simultaneously, but when the connectivity port lazy weight of read write line 30 is to be supplied to all antenna assemblies 10, first can be connected the antenna assembly 10 of each rack by the distributor 50 of connectivity port abundance, then, then distributor 50 and read write line 30 are interconnected, thus, several neighboring cabinet parallel system can be extended to.Further, the assets information that the antenna assembly 10 of expansion was collected, by by wireless or wired access point (AccessPoint, AP), is passed on toward control end 40 and is recorded in database 41.
The assets information that described antenna assembly 10 reads in order to be interconnected by communication interface and read write line 30, and is stored to database 41 for asset management by control end 40.Described control end 40 is generally the computer terminal possessing central processor equipment and storage facilities, and possesses communication interface in order to intercom with read write line 30 phase, described communication interface, as: RS-232, Ethernet, Wi-Fi, GPRS...... etc.Because communication interface is prior art, therefore much more no longer to repeat at this.Be noted that control end 40 is sustainable especially and just receive assets information every the spacer segment time, and produce when exceeding and but not receiving assets information yet described interval time and show announcement information to inform user's asset equipment generation unusual fluctuation.
In aforesaid way, communication interface is connected with read write line 30 in the mode of radio communication or wire communication, and the label information read in real time (i.e. assets information) is conveyed to control end 40 and is recorded in database 41.Now, user retrieves by the operating system of control end 40, moves and extract received assets information, and by the variation of assets message and then action message value and the facilities information of learning asset equipment.In addition, user also can newly the adding of operating database 41 pairs of assets and facility, upgrade, move, sell, discard, the information such as to replace stores in real time and manages.
Said antenna device 10 can be arranged on the doorframe of rack glass door or iron net door.Antenna assembly 10 is mainly made up of following a few part: one is, dielectric substrate 110; Two are, are formed in the one side of above-mentioned dielectric substrate 110, the bending microstripline 120 (or being called radiation loop) of radiated electromagnetic wave; Three are, are formed in the ground plane 111 of above-mentioned dielectric substrate 110 another side; Four are, the vertical one end of antenna has the input 130 connected for the purpose of feeder line; Five are, connect the load resistance 140 of bending microstripline 120, and this load resistance 140 are electrically connected ground plane 111 through through hole 150.In addition, according to antenna outward appearance subsidiary in the present invention, use because antenna assembly 10 is mounted in rack door and window, so consider attractive in appearance, antenna assembly 10 width needs narrower (within 10cm).Being subject to this finite ground face to ring, can there are some repercussion scatterings in antenna assembly 10.Therefore, according to the rack door and window ground plane situation of attachment antenna assembly 10, the electric field/magnetic field distribution on the ground plane 111 of antenna assembly 10 is by different.When particularly the conductivity area of rack door and window is greater than ground plane 111, can be utilized at repercussion scattering problems and guarantee evenly to identify in the problem in field in antenna effective area.Want the real-time asset management system effectively used in the present invention, and guarantee stable discrimination, the electronic tag 20 be attached on every platform equipment can not depart from beyond antenna assembly 10 effective area.Further, with the attachment position of antenna assembly 10, electronic tag 20 also must guarantee that relative effective area is maximum.
Next, explain according to the part of read assets information for asset management for control end 40, first control end 40 receives successively and processes the data receiving most electronic tag 20 in identification range from read write line 30, further, electronic tag 20 information read is the realtime running assets of particular cabinet by being identified as.This process periodically updates at set intervals, if the event that electronic tag 20 information that generation special time should read could not normally read, the identification range that electronic tag 20 has departed from the antenna assembly 10 of particular cabinet will be identified as, and the information feed back of respective electronic label 20 to the UI application program of control end 40, be sent on auxiliary output medium (PDP picture).UI application program is presented at the detailed content of these information on the PDP picture of operating system, operator can real-time management, the asset stream that monitors to.
On the contrary, the real-time asset management system in the present invention can search for the intrinsic assets information of particular device.According to order request, the assets information of the intrinsic label assets information (i.e. assets information) that the antenna assembly 10 of the indivedual racks connected by distributor 50 in rfid system is recognized and database compares, find out real-time matching information, and passed on the information such as the position of particular cabinet equipment by system to operator.Particularly by additional functions such as in the working balance retrieval within the scope of the definite term additional in application program, particular cabinet, assets make an inventory of warning function setting, the alternate cycle of inventory assets sets, assets mobile route is searched, intelligentized cabinet equipment real time asset management mode can be realized.
By periodicity this process repeatedly, realize managing the real time asset of particular device in rack.Further, utilize the movable passageway in particular space field and portable RFID device, the stability of system can be improved.
Antenna assembly 10 of the present invention is applied in the middle of rack assets real-time management system, not only can real-time tracing from the warehouse-in of assets to outbound, installation, the movement of all assets such as utilization and demand, and these information can be sent to operating system and database carries out keeping.Be convenient to understand and formulate the procurement plan of operating facilities, relevant assets procurement plan and ordering of raw materials plan.The efficiency of asset management business can be improved simultaneously comprehensively.In practical application, the complicated approval process time can be reduced.By sharing and retrieve real-time installation and the operation information of the domestic-investment product of rack, systemic asset management and tracking also become and for ease.
The assets information that rfid system (comprising: antenna assembly 10, electronic tag 20 and read write line 30) obtains, except being sent to control end 40, is also connected with other systems such as ERP (EnterpriseResourcePlanning) by the Internet.Further, in order to realize the efficient management between parent company and remote branch company, the maintenance realizing following assets and system physical assets investigation, prevent the budget waste that causes because of the loss of current assets, can raw materials on hand be optimized.Meanwhile, replace naked eyes so far to confirm with RFID intelligent management and the on-the-spot assets investigation business of hand-kept account book, not only increase the accuracy of business, and stock can be completed rapidly and interrogate and examine.In addition, based on standardized RFID coding scheme, provide stock control live analysis of data to all departments, better support that company leader is comprehensive to stock control, the decision-making of system.
Antenna assembly 10 in the present invention, can use into intelligent shelving type reading and writing device antenna or books in libraries managing antenna range of application expansion.Further, also can be applied to medicine management conveyer belt antenna, put board type antenna, or manage the Special shelf antenna of the various display of products in large-scale sales field.
As mentioned above, be by limited embodiment and accompanying drawing in the present invention, specialized the specific items such as the compositing factor of bending microstripline and parasitic agent.But these are the embodiments provided to help to improve comprehensive understanding level.The present invention can not only be confined in the embodiment mentioned herein.In the middle of the field belonging to the present invention, as long as there is the people of similar relevant knowledge, just by these bases, carry out various forms of correction and distortion.Therefore, thought of the present invention can not only be confined in the embodiment of above-mentioned explanation, is not only claim described later, and all the elements of or equivalent transformation impartial with these claims, all will be considered as being included in the middle of thought range of the present invention.
Claims (9)
1. a near field read-write antenna device, is characterized in that, comprising:
Dielectric substrate, the first surface of this dielectric substrate is formed with ground plane;
Bending microstripline, in order to be arranged on second of this dielectric substrate, and reads at least one electronic tag signal in electromagnetic coupled mode, and described bending microstripline forms the cascaded structure radiant body of bending form, sinusoidal wave in order to property performance period near field; Described bending microstripline offsets a distance and is provided with parasitic agent in bending place, described parasitic agent has multiple, each parasitic agent lays respectively between the adjacent bend place of described bending microstripline, and adjacent described parasitic agent lays respectively at the not homonymy of described bending microstripline;
Input, in order to be arranged on the first end of this dielectric substrate, and is electrically connected head end and a read write line of this bending microstripline;
Load resistance, in order to be arranged on the second end of this dielectric substrate, and is electrically connected the tail end of this bending microstripline;
Through hole, in order to be electrically connected this ground plane and this load resistance to form short-circuit loop;
Described antenna assembly defines the cascaded structure radiant body of bending form from input to end.
2. antenna assembly as claimed in claim 1, it is characterized in that, the length of this antenna assembly and width adjust according to the total length of this bending microstripline, and its adjusting range is expanded to λ/2 from λ/4.
3. antenna assembly as claimed in claim 1, is characterized in that, the length of the distance that described parasitic agent offsets relative to described bending microstripline and parasitic agent at least adjusts according to antenna impedance bandwidth and reflection loss design variable.
4. antenna assembly as claimed in claim 1, it is characterized in that, this antenna assembly is the near field antenna of ultra-high frequency band.
5. application is as a real-time asset management system for the near field read-write antenna device in claim 1-4 as described in any one, and it is characterized in that, this system comprises:
At least one electronic tag, each electronic tag is arranged in corresponding asset equipment respectively, and described electronic tag stores corresponding assets information;
One read write line, this read write line is electrically connected described antenna assembly, in order to receive the assets information that described antenna assembly reads; And
One control end, in order to be interconnected by a communication interface and this read write line, and is stored to a database for asset management by the assets information that described antenna assembly reads.
6. system as claimed in claim 5, it is characterized in that, this electronic tag is the metal label of hyperfrequency.
7. system as claimed in claim 5, is characterized in that, this communication interface is interconnected with the mode of radio communication or wire communication and this read write line.
8. system as claimed in claim 5, is characterized in that, this read write line is electrically connected by least one distributor and described antenna assembly.
9. system as claimed in claim 5, is characterized in that, this control end continues to receive assets information every an interval time, and produces when exceeding and not receiving assets information yet this interval time and show an announcement information.
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| CN106785331B (en) * | 2016-11-16 | 2019-03-19 | 刘启达 | The intelligent counter system of linear polarization near field antenna applied to gold and jewelry industry |
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| CN101052775A (en) * | 2004-11-02 | 2007-10-10 | 传感电子公司 | RFID near field microstrip antenna |
| CN201751904U (en) * | 2010-08-11 | 2011-02-23 | 中兴通讯股份有限公司 | Electronic label reader |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
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| JP4722064B2 (en) * | 2007-02-27 | 2011-07-13 | ブラザー工業株式会社 | Antenna and wireless tag |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052775A (en) * | 2004-11-02 | 2007-10-10 | 传感电子公司 | RFID near field microstrip antenna |
| CN201751904U (en) * | 2010-08-11 | 2011-02-23 | 中兴通讯股份有限公司 | Electronic label reader |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
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| CN103178337A (en) | 2013-06-26 |
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