CN202257657U

CN202257657U - Passive RFID tag

Info

Publication number: CN202257657U
Application number: CN2011204007694U
Authority: CN
Inventors: 徐轶凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-20
Filing date: 2011-10-20
Publication date: 2012-05-30
Anticipated expiration: 2021-10-20

Abstract

The utility model discloses a passive RFID (Radio Frequency Identification) tag which comprises an antenna coil, an RFID chip and a switch. The antenna coil is connected with the switch to form a loop together with the RFID chip; the purpose of controlling the connection and the disconnection between the RFID tag and the antenna coil can be achieved through that the switch controls the state of the connection between the RFID chip and the antenna coil, so as to achieve the control to the reading of the RFID tag ; and only under the premise of a user' permission, the switch can be switched on, and then the RFID tag can be read, so that the situation that the RFID tag always is in an information transmission state is prevented, and the risks of copying and stealing the information are avoided.

Description

A kind of passive RFID tags

Technical field

The utility model relates to a kind of RFID label, particularly a kind of passive RFID tags.

Background technology

RFID (RF identification) technology is a kind of non-contact automatic identification technology; It is through the automatic recognition objective object of radiofrequency signal and obtain related data, because of its identification work need not manual intervention, and can work in various rugged surroundings; Convenient to operation, and be widely used.

Simple rfid system is usually by a reader (or interrogator), and a plurality of labels (or transponder) and application software system three parts are formed, and its course of work does; Send radiofrequency signal by reader; Label receives the radiofrequency signal that reader sends, and sees off by means of the data that the energy drives label that induction current obtained will be stored in the label chip, and reader receives also understands the data that label sends; Deliver to application software system and do handled, with the information of identification label.

Wherein label is the important ingredient of rfid system; Be the information carrier of rfid system, client's data information, merchandise news etc. need recognition data all to be stored in the chip of label; The passive RFID tags of prior art is is directly connected and composed by aerial coil and a RFID chip usually; Label always is in information transfer state, will the data of its chip-stored be sent as long as receive the specific, radio-frequency signal of card-reading apparatus transmissions such as reader, and its canned data is easy to read and duplicate by equipment such as readers; This makes based on the pass of RFID; Passport, credit card and other similar information transmission cards suffer the information theft and the fraud of initiation identity theft or other type often.

At present the RFID technology has been widely used in the various aspects of living; People need carry the various cards that encapsulate the RFID label, and this carries and manage numerous cards and brings a lot of inconvenience to the individual, for addressing this problem; The scheme of " multi-use card " has been proposed at present; Sum up, it mainly divides dual mode: a kind of is the RFID label of a plurality of different operating frequencies of encapsulation in a card, and the RFID chip of these labels connects the aerial coil of each self-corresponding different frequency respectively, but this mode can not be with the tag package of identical frequency of operation in a card; In order to avoid cause that the RFID tag identification data is chaotic; And the RFID label that encapsulates in the card that daily people use much all uses same technical specification, and its frequency of operation is identical, so still need carry a plurality of cards that encapsulate the RFID label; Another kind of mode is; Use a RFID label to share and use for a plurality of application software systems; The data that read of each application software system are kept at the different sectors of same RFID label chip storage medium; Distinguish the information that present needs read designated sector in the chip by application software, so just caused all information to be positioned in the storage medium of a RFID chip, for the safety of data has been brought great hidden danger; If the RFID chip information is replicated and obtains, its full detail all will be stolen.

Therefore, how effectively to control card-reading apparatus such as reader, prevent that information leakage and a plurality of label from merging is present urgent problem arbitrarily the reading of RFID label.

Summary of the invention

The utility model aims to provide a kind of simple in structure, and the passive RFID tags that arbitrarily read of may command RFID label.

The described passive RFID tags of the utility model comprises aerial coil, RFID chip and switch, and aerial coil is connected to form the loop with the RFID chip after connecting switch.

The described passive RFID tags of the utility model; By aerial coil, switch and the series connection of RFID chip form the loop, and RFID chip and aerial coil are connected and formed the loop when switch closure; Aerial coil receives the radiofrequency signal that card-reading apparatus such as reader send; Be converted into electric current and flow to the RFID chip, drive the RFID chip data of its storage are sent, read by reader; When switch broke off, the disconnection that is connected of FRID chip and aerial coil can't drive, and reader can't reading of data.

Through the connection status between switch control RFID chip and the aerial coil; Reach the purpose that is communicated with or breaks off between control RFID label and the aerial coil; Realize the control that the RFID label is read, coupling cock when only being used in the user and permitting just can make the RFID label be read; Avoid the RFID label to be in information transfer state, information is replicated the risk of stealing always.

Description of drawings

Fig. 1 is the circuit theory diagrams of the utility model passive RFID tags.

Fig. 2 connects the circuit theory diagrams of the passive RFID tags of multigang switch for the utility model.

Fig. 3 connects the circuit theory diagrams of the passive FRIID label of a plurality of switches for the utility model.

Fig. 4 is the structural drawing of prior art multigang switch.

Fig. 5 is the structural map of the utility model passive RFID tags.

Embodiment

Like Fig. 1, the utility model discloses a kind of passive RFID tags, by aerial coil 1; Switch 2 is followed in series to form with RFID chip 3, through closure or cut-off switch 2, and the connection status of control RFID chip 3 and aerial coil 1; And then realization control reader reading to the RFID label; RFID chip 3 is communicated with aerial coil 1 when switch 1 closure, and aerial coil 1 is converted into current drives RFID chip 3 transmission data after receiving radiofrequency signal, and reader reads the data that are stored in the RFID chip; When switch 1 broke off, RFID chip 3 broke off with aerial coil 1 and being connected, and RFID chip 3 does not have current drives to work, and its data can't be read by reader, avoid the RFID label to be in information transfer state, the risk that information is stolen by bootlegging always.

As a kind of improvement of the utility model, can change single connection plane switch into bigeminy or the multigang switch more than the bigeminy, change single connection plane switch into tetrad switch 2` like Fig. 2, comprise not moved end terminal L and four moved end terminal l1, l2 with reference to figure 4 tetrad switches; L3 and l4, the not moved end terminal L of tetrad switch is connected with aerial coil 1` one end, four moved end terminal l1, l2; L3 is connected RFID chip 3` respectively with l4, is connected with the aerial coil 1` other end jointly behind the 4`, 5` and 6`, forms four loops; 2` makes four moved end terminal l1 through control tetrad switch, l2, l3, the closed or disconnection of l4 and moved end L; Can control RFID chip 3` respectively, 4`, 5`, the connection status of 6` and aerial coil 1`; Make RFID chip 3`, 4`, 5`, one of them is communicated with 6` with aerial coil 1` or breaks off; Realization control reader reads four different RF ID chips, and simultaneously one of them RFID chip is communicated with aerial coil, and data are read, and each RFID chip does not disturb mutually.

The function that it has realized four RFID label unifications can be integrated the RFID label of four identical or different technical specifications, is encapsulated in the card; Remove the trouble of carrying a plurality of RFID of being packaged with tag cards from for the user; These four RFID chip 3`, 4`, 5`; 6` has storage medium separately; Its storage medium is separate, if one of them RFID chip information is replicated and steals the information leakage that can not make in other three RFID chip-stored, effectively protects user's information security; And it can the RFID chip that constructed specification frequency is identical be integrated and disturb mutually, has solved the problem that constructed specification RFID label can not merge.

Another kind as the utility model improves, and can a single connection plane switch and a RFID chip be formed a branch road, with a plurality of loops of the parallelly connected formation with aerial coil of two or more branch roads; Connect into branch road like Fig. 3 single connection plane switch 2b and RFID chip 2c, same single connection plane switch 3b and RFID chip 3c connect into branch road, and single connection plane switch 4b and RFID chip 4c connect into branch road; Single connection plane switch 5b and RFID chip 5c connect into branch road, and these four branch roads and aerial coil 1a also connect four loops of formation, through closure or cut-off switch 2b; 3b, 4b and 5b

control RFID chip

2c, 3c respectively; The connection status of 4c and 5c and aerial coil 1a; And then realize the control reader to different

RF ID chip

2c, and 3c, 4c and 5c read.

It can realize the function with a plurality of RFID label unifications equally, and may command card-reading apparatus directly reading the RRID label.

Claims

1. a passive RFID tags comprises aerial coil, and the RFID chip is characterized in that: also comprise switch, aerial coil is connected to form the loop with the RFID chip after connecting switch.

2. passive RFID tags according to claim 1; It is characterized in that: said switch is bigeminy or the above multigang switch of bigeminy; The not moved end of the multigang switch that bigeminy or bigeminy are above is connected with aerial coil one end, and the other end that the moved end of the multigang switch more than bigeminy or the bigeminy connects respectively behind the RFID chip with aerial coil is connected to form a plurality of loops.

3. passive RFID tags according to claim 1 is characterized in that, comprises being no less than two switches and RFID label, and each switch is connected a plurality of loops of parallelly connected formation with aerial coil, back respectively with a RFID label.