CN208314841U - A kind of ultrahigh frequency RFID device of label independence energy supply - Google Patents
A kind of ultrahigh frequency RFID device of label independence energy supply Download PDFInfo
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- CN208314841U CN208314841U CN201820893832.4U CN201820893832U CN208314841U CN 208314841 U CN208314841 U CN 208314841U CN 201820893832 U CN201820893832 U CN 201820893832U CN 208314841 U CN208314841 U CN 208314841U
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Abstract
The utility model provides a kind of ultrahigh frequency RFID device of label independence energy supply, including reader and passive label, it is communicated to connect between the reader and the label by read-write antenna, it further include power signal source and activation antenna, the signal input interface of the UHF Power output interface of the power signal source and the activation antenna communicates to connect, and the energy output interface of the activation antenna and the energy input interface of the passive label communicate to connect.The utility model solves ultra-high frequency RFID label because of environmental problem (such as liquid environment, super long distance environment, object blocks environment etc.) cause ultrahigh frequency radio frequency identification (RFID) reader emitted energy insufficient, ultra-high frequency RFID label can not be activated, or ultra-high frequency RFID label returns to energy deficiency, can not parse the problem of identifying by ultrahigh frequency radio frequency identification (RFID) reader.
Description
Technical field
The utility model relates to a kind of ultrahigh frequency RFID devices, more specifically design a kind of hyperfrequency of label independence energy supply
RFID device.
Background technique
With the extensive use of ultra-high frequency RFID label, there are more application scenarios to need using ultra-high frequency RFID technology,
For example new retail trade, cloth grass wash rental service, clothes shops etc..But due to ultra-high frequency RFID technology, RFID tag is
Passive, it needs to carry out offer energy by reader, as shown in Figure 1, the workflow of usually ultrahigh frequency radio frequency identification (RFID) reader is
Reader A emitted energy passes to ultrahigh-frequency tag F by antenna E, and label F returns to the signal of modulation by antenna E
Reader A is given, label is completed and reads.But since the energy that in many use environments, reader is sent is because of attenuation of air,
Liquid absorption, object, which such as blocks at reasons, the energy for reaching RFID tag, just to be become seldom, and label can not be activated, and cause to read and write
The label read rate (label reads quantity and reading speed) of device is very low.If improving reader simply exports energy, due to super
High frequency RFID technique is self-interference system, and the energy of transmission is bigger, and the interference of oneself bring is also bigger, equally can not be real well
The reading of existing label.
Summary of the invention
Purpose of utility model: the utility model aim is in view of the deficiencies of the prior art, to provide a kind of high sensitivity, anti-
The ultrahigh frequency RFID device of the strong label independence energy supply of interference performance.
Technical solution: a kind of ultrahigh frequency RFID device of label independence energy supply described in the utility model, including reader and
Passive label is communicated to connect by read-write antenna between the reader and the label, further includes power signal source and activation
The signal input interface of antenna, the high frequency power output interface of the power signal source and the activation antenna communicates to connect, institute
The energy input interface of the energy output interface and the passive label of stating activation antenna communicates to connect.
Technical solutions of the utility model are further defined to, and the power signal source is the reader, and is also wrapped
It includes and the signal source coupling that the reader exports is divided into two-part power coupler, the read-write of the power coupler
Output interface and the signal input interface of the read-write antenna communicate to connect, the activation signal output interface of the power coupler
It is communicated to connect with the signal input interface of the activation antenna.
Further, power amplifier is also set up between the power coupler and the activation antenna.
Further, the power signal source is independent power signal source.
Further, the read-write antenna and the activation antenna are the antenna or difference polarization mode of same polarization mode
Antenna, the set-up mode of antenna are vertically to put, or arranged side by side put or spaced apart put.
Further, the read-write antenna and/or the activation antenna are two or more antennas, described two or more antennas
It is combined by power splitter or antenna timesharing distributor.
The utility model has the advantages that a kind of ultrahigh frequency RFID device of label independence energy supply provided by the utility model, solves hyperfrequency
RFID tag leads to ultrahigh frequency radio frequency identification (RFID) reader because of environmental problem (such as liquid environment, super long distance environment, object block environment etc.)
Emitted energy is insufficient, ultra-high frequency RFID label can not be activated or ultra-high frequency RFID label to return to energy insufficient, can not be by
The problem of ultrahigh frequency radio frequency identification (RFID) reader parsing identification, and since the activating sensitivity of current label is not high enough, reader is read
The link of label is in non-equilibrium state, using the method, can solve link imbalance, improves label read rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model ultrahigh frequency RFID device described in background technology；
Fig. 2 is the structural schematic diagram of the ultrahigh frequency RFID device of label standalone feature described in the utility model embodiment 1；
Fig. 3 is the structural schematic diagram of the ultrahigh frequency RFID device of label standalone feature described in the utility model embodiment 2.
Specific embodiment
Technical solutions of the utility model are described in detail below by attached drawing, but the protection scope of the utility model
It is not limited to the embodiment.
Embodiment 1: a kind of ultrahigh frequency RFID device of label independence energy supply, the label read to needs separately provide
Energy, and the space isolation etc. of the antenna using the decaying or different directions of the electromagnetic wave of space length are super to improve
HF RPID tags read rate is especially suitable for the case where moisture is more multi-environment and label intensively stacks.
The structural schematic diagram of the ultrahigh frequency RFID device of label standalone feature provided in this embodiment is as shown in Fig. 2, with biography
The RFID device of system is identical, including reader A and passive label F, passes through read-write day between the reader A and the label F
Line E communication connection.It the difference is that, further include power signal source and activation antenna D, the function with traditional RFID device
The signal input interface of the high frequency power output interface of rate signal source and the activation antenna D communicate to connect, the activation antenna D
Energy output interface and the passive label F energy input interface communicate to connect.
In the present embodiment, the power signal source is the reader A, and further includes exporting the reader A
Signal source coupling is divided into two-part power coupler B and carries out the power amplifier C, the power coupler B of power amplification
Read-write output interface and the read-write antenna E signal input interface communicate to connect, the activation of the power coupler B
Signal output interface is connect with the signal input interface of the power amplifier C, the signal output interface of the power amplifier C
It is communicated to connect with the signal input interface of the activation antenna D.Wherein, the parameters relationship between each signal are as follows: the coefficient of coup of B
For a, the gain of power amplifier is b, tag activation sensitivity c, the signal decaying of label modulation loss c1, antenna D to label F
D, the signal of label F to antenna E are decayed e, gain d1 of the antenna D to label F, hair of the antenna E to the antenna gain e1, A of label F
Penetrate power f, the saturation power value h of the receiving sensitivity g, A of A.The attenuation of air de of antenna D to antenna E, antenna D are to antenna E's
The E-antenna gain ed1 of D antenna gain de1, antenna E to antenna D.So the transmission power of D, that is, power amplifier C output power i:f-a
+ b (in the case where guaranteeing i, a is small as far as possible), wherein 1:i+d1-d > c；2:i+d1-d-c1-e+e1 > g；3:i+de1+ed1-de <
h。
The connection type of the present embodiment: it is connected between reader A and read-write antenna E by feeder line, reader A, power coupling
It is also to be connected to by feeder line, and lead between read-write antenna E and passive label F between clutch B, power amplifier C and activation antenna D
Wireless signal connection is crossed, activating is also to be connected between antenna D and passive label F by wireless signal.
The working principle of above-mentioned technical proposal are as follows: the signal of ultrahigh frequency radio frequency identification (RFID) reader A output, by power coupler B,
Sub-fraction energy coupling is come out, it is amplified by power amplifier C then, is exported by antenna D and gives passive label F,
After passive label F activation, the signal of return is returned into reader A by antenna E, label is completed and reads；Meanwhile reader
Most of energy, by coupler, by antenna E, passive label F is given in output, after passive label F activation, by the letter of return
Number, by antenna E, reader A is returned to, label is completed and reads.
In order to realize above-mentioned principle, to antenna put require it is very high, the read-write antenna E and the activation antenna D are
The antenna of the antenna of same polarization mode or different polarization modes, the set-up mode of antenna be vertically put, or put side by side, or
It puts at a certain distance.Since the output energy of antenna D is very big, but by space be isolated perhaps antenna polarization isolation or
The allocating antennas methods such as its space of lines isolation, so that when reaching the antenna end E, signal is decayed to normally from the signal that antenna D is exported
Level will not influence the reading sensitivity and overload saturation threshold of reader A, work normally reader A.Usual antenna D and
Antenna E is to put to have the different antenna 2 antenna D and antenna E for intensifying mode of 1 selection vertically to put 3 antenna D and day with selection method
Line E is coplanar side by side to put 4 antenna D and antenna E is spaced apart puts.When two antenna spacing certain distances are put, every
Distance needs determine that the attenuation of air needed is according to electromagnetic wave in sky according to preventing reader to be saturated required attenuation of air
Propagation formula calculates in gas, attenuation of air=32.44+20lg d (Km)+20lg f (MHz).
In addition, the read-write antenna E and/or activation antenna D is two or more antennas, described two or more antennas are logical
Power splitter or the combination of antenna timesharing distributor are crossed, to realize better energy supply.
The method of label independence energy supply in above-mentioned ultrahigh frequency RFID device are as follows: independent for label by independent activation antenna
Activation energy is provided, the power signal source of the activation antenna is the reader A, reduces the requirement of networking, and can make
Function is synchronous with reading, improves raising ultrahigh frequency RFID read rate in particular circumstances.
Embodiment 2: a kind of ultrahigh frequency RFID device of label independence energy supply, structural schematic diagram is as shown in figure 3, its structure
It is substantially the same manner as Example 1, difference are as follows: the power signal source is independent power signal source G.Reader A sends instruction,
By antenna E, it is sent to passive label F.Since tag distances antenna E is farther out or due to the energy deficiency etc. that issues of antenna E,
Energy is not enough to activate passive label F, or activation passive label F in time, and the signal that label returns is very faint, reader A
Signal can not be extracted, label reading cannot be completed.At this point, power signal source G (power can be adjusted according to actual needs), passes through
Antenna D provides energy to the passive label F of ultrahigh frequency RFID, and passive label F is allowed to be in the state that is activated.Passive label F passes through
The energy signal from antenna D is modulated, modulated signal is returned into reader A by antenna E, label is completed and reads.
The output power setting method of above-mentioned power signal source G are as follows: tag activation sensitivity c, label modulation loss c1, day
Line D is to the signal decaying d of label F, and the signal decaying e of label F to antenna E, antenna D is to the gain d1 of label F, and antenna E is to mark
Sign the saturation power value h of the receiving sensitivity g, A of the transmission power f, A of the antenna gain e1, A of F.Air of the antenna D to antenna E
Decay de, the E-antenna gain ed1 of D the antenna gain de1, antenna E to antenna D of antenna D to antenna E.So the transmission power of D
That is the output power i of signal source G, wherein 1:i+d1-d > c；2:i+d1-d-c1-e+e1 > g；3:i+de1+ed1-de < h.
The energy that power signal source G is provided is a stable carrier signal, and the frequency bandwidth of passive label F can compare
Width, thus do not need it is synchronous with reading data, as long as deviateing communication channel channel, not interference communications, using independent signal
Source can implement the feeder line between the BCD in 1 to avoid scheme, convenient for implementing in scheme.And in how independent signal source function
In the case of, it can be opened using timesharing, reduce the quantity of synchronization activation label, reduce tag-collision, high label is provided and is read
Take rate.
As described above, although the utility model has been indicated and described referring to specific preferred embodiment, it must not
It is construed to the limitation to the utility model itself.In the spirit and scope for not departing from the utility model that appended claims define
Under the premise of, it can various changes can be made in the form and details to it.
Claims (6)
1. a kind of ultrahigh frequency RFID device of label independence energy supply, including reader (A) and passive label (F), the reader
(A) it is communicated to connect between the label (F) by read-write antenna (E), which is characterized in that further include power signal source and activation
Antenna (D), the UHF Power output interface of the power signal source are communicated with the signal input interface of activation antenna (D)
Connection, the energy output interface of activation antenna (D) and the energy input interface of the passive label (F) communicate to connect.
2. a kind of ultrahigh frequency RFID device of label independence energy supply according to claim 1, which is characterized in that the power
Signal source is the reader (A), and further includes that the signal source coupling of the reader (A) output is divided into two-part function
Rate coupler (B), the read-write output interface of the power coupler (B) connect with the signal input of the read-write antenna (E)
Port communications connection, the signal input interface of the activation signal output interface of the power coupler (B) and activation antenna (D)
Communication connection.
3. a kind of ultrahigh frequency RFID device of label independence energy supply according to claim 2, which is characterized in that the power
Power amplifier (C) is also set up between coupler (B) and the activation antenna (D).
4. a kind of ultrahigh frequency RFID device of label independence energy supply according to claim 1, which is characterized in that the power
Signal source is independent power signal source (G).
5. a kind of ultrahigh frequency RFID device of label independence energy supply described in any claim according to claim 1 ~ 4, special
Sign is that the read-write antenna (E) and activation antenna (D) are the antenna of same polarization mode or the day of different polarization modes
Line, the set-up mode of antenna are vertically to put, or arranged side by side put or spaced apart put.
6. a kind of ultrahigh frequency RFID device of label independence energy supply described in any claim according to claim 1 ~ 4, special
Sign is that the read-write antenna (E) and/or the activation antenna (D) are two or more antennas, and described two or more antennas pass through
Power splitter or the combination of antenna timesharing distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820893832.4U CN208314841U (en) | 2018-06-11 | 2018-06-11 | A kind of ultrahigh frequency RFID device of label independence energy supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820893832.4U CN208314841U (en) | 2018-06-11 | 2018-06-11 | A kind of ultrahigh frequency RFID device of label independence energy supply |
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| Publication Number | Publication Date |
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| CN208314841U true CN208314841U (en) | 2019-01-01 |
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| CN201820893832.4U Withdrawn - After Issue CN208314841U (en) | 2018-06-11 | 2018-06-11 | A kind of ultrahigh frequency RFID device of label independence energy supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN109919286A (en) * | 2019-01-25 | 2019-06-21 | 上海烨煊信息技术有限公司 | A kind of electronic tag |
| CN114595793A (en) * | 2022-05-10 | 2022-06-07 | 浙江海康科技有限公司 | Ultrahigh frequency RFID power system, compensation method and power compensator |
-
2018
- 2018-06-11 CN CN201820893832.4U patent/CN208314841U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN108596322B (en) * | 2018-06-11 | 2023-12-15 | 上海双十信息科技有限公司 | Ultrahigh frequency RFID device and method with independent energy supply of labels |
| CN109919286A (en) * | 2019-01-25 | 2019-06-21 | 上海烨煊信息技术有限公司 | A kind of electronic tag |
| CN109919286B (en) * | 2019-01-25 | 2022-03-08 | 上海烨煊信息技术有限公司 | Electronic label |
| CN114595793A (en) * | 2022-05-10 | 2022-06-07 | 浙江海康科技有限公司 | Ultrahigh frequency RFID power system, compensation method and power compensator |
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