CN206594691U - Radio frequency recognizing electronic label echo signal processing circuit - Google Patents
Radio frequency recognizing electronic label echo signal processing circuit Download PDFInfo
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- CN206594691U CN206594691U CN201720201567.4U CN201720201567U CN206594691U CN 206594691 U CN206594691 U CN 206594691U CN 201720201567 U CN201720201567 U CN 201720201567U CN 206594691 U CN206594691 U CN 206594691U
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Abstract
The utility model provides a kind of radio frequency recognizing electronic label echo signal processing circuit, includes the intermediate frequency network of antenna module and the connection antenna module；Single input and multi-output gating switch, multiple input single output gating switch, straight-through branch road, the first frequency range filtering circuit, the second frequency range filtering circuit, the 3rd frequency range filtering circuit are set respectively between the single input and multi-output gating switch and multiple input single output gating switch, the input of the single input and multi-output gating switch connects the intermediate frequency network, the output end connection signal processing unit of the multiple input single output gating switch, the signal processing unit is used to handle corresponding label information；Switch unit, the switch unit connects the single input and multi-output gating switch and multiple input single output gating switch with the conducting branches between determining to input and exporting respectively.The utility model improves the performance that radio-frequency identification reader/writer recognizes radio frequency recognizing electronic label, is adapted to different complex environments.
Description
Technical field
The utility model is related to field of radio frequency identification, more particularly to a kind of radio frequency recognizing electronic label echo signal processing electricity
Road.
Background technology
In field of radio frequency identification, radio-frequency identification reader/writer is penetrated by launching radiofrequency signal to radio frequency recognizing electronic label
Frequency identification electronic tag return echo signal is to radio-frequency identification reader/writer, to realize communication each other.And radio frequency identification is electric
Subtab echo-signal includes the label information of radio-frequency identification reader/writer to be transferred in radio frequency recognizing electronic label, echo letter
The transmission rate of label information in number is that the configuration information for being sent to radio frequency recognizing electronic label by radio-frequency identification reader/writer is true
Fixed.And in different situations, the requirement of different transmission rates is had, because different transmission rates can be to radio frequency identification
The recognition effect of read write line produces different influences.Transmission rate is lower, and radio-frequency identification reader/writer is to the label in echo-signal
Information identification decoding is easier, so as to recognize that sensitivity is higher, identification distance mutually strains remote；Conversely, transmission rate is higher, transmission
Label information to radio-frequency identification reader/writer is more, can send label information more times.
Meanwhile, above-mentioned label information is substantially directly extracted from intermediate-freuqncy signal, and intermediate-freuqncy signal can be penetrated by adjacent
The interference of the complex environments such as the mid-frequency noise that frequency identification read write line transmitting carrier wave is produced, the intermediate-freuqncy signal of different transmission rates all can
In the presence of the influence of corresponding interference noise, the recognition performance of radio-frequency identification reader/writer is leveraged.In addition, to the place of echo-signal
Also there is the phenomenons such as dc shift in reason process, cause, to the more complicated of the signal transactings of different transmission rates change, to need design badly
A kind of circuit by optimization can overcome drawbacks described above.
Utility model content
The purpose of this utility model is to provide a kind of radio frequency recognizing electronic label echo signal processing circuit, solved existing
There is radio-frequency identification reader/writer in technology not good to radio frequency recognizing electronic label recognition performance, the not strong technology of complex environment adaptability
Problem.
In order to solve the above-mentioned technical problem, a kind of radio frequency recognizing electronic label echo signal processing electricity of the present utility model
Road, including：
For receiving the antenna module of echo-signal and the intermediate frequency network of the connection antenna module, the intermediate frequency network is used
Intermediate-freuqncy signal in acquisition echo-signal；
Single input and multi-output gating switch and the multiple input single output coordinated with the single input and multi-output gating switch are selected
Pass is opened up, the input of the single input and multi-output gating switch connects the intermediate frequency network, the single input and multi-output gating
First output end of switch connects the first input end of the multiple input single output gating switch, the single input and multi-output gating
Second output end of switch connects the second input of the multiple input single output gating switch by the first frequency range filtering circuit,
3rd output end of the single input and multi-output gating switch connects the multiple input single output by the second frequency range filtering circuit
3rd input of gating switch, the 4th output end of the single input and multi-output gating switch passes through the 3rd frequency range filtering circuit
Connect the 4th input of the multiple input single output gating switch, the output end connection of the multiple input single output gating switch
Signal processing unit, the signal processing unit is used to handle corresponding label information；
Switch unit, the switch unit connects the single input and multi-output gating switch and multiple input single output choosing respectively
Pass is opened up with the conducting branches between control input and output.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, the list
Input multi output gating switch be single input four output gating switch and/or the multiple input single output gating switch be four inputs
Single output gating switch.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, the day
Line component includes the reception network of antenna and the connection antenna, and by gating connection, antenna is received back to the reception network all the way
Ripple signal.
It is described as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model
Intermediate frequency network includes connecting and kept apart described in the demodulator of the antenna module, the disconnecting switch of the connection demodulator and connection
The preamplifying circuit of pass.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, described
The passband of one frequency range filtering circuit is 0Hz ~ 400KHz.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, described
The passband of two frequency range filtering circuits is 20KHz ~ 1.2MHz.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, described
The passband of three frequency range filtering circuits is 20KHz ~ 2MHz.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, the list
Input the 5th output end of multi output gating switch by balanced device connect the multiple input single output gating switch it is the 5th defeated
Enter end.
It is used as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model, the list
Input the 6th output end of multi output gating switch by amplifier connect the multiple input single output gating switch it is the 6th defeated
Enter end.
It is described to cut as the further improvement of the above-mentioned radio frequency recognizing electronic label echo signal processing circuit of the utility model
Change the configuration information control conducting branches that unit is sent to radio frequency recognizing electronic label according to radio-frequency identification reader/writer.
Compared with prior art, the utility model sets single input and multi-output between intermediate frequency network and signal processing unit
Gating switch and multiple input single output gating switch, single input and multi-output gating switch and multiple input single output gating switch it
Between a plurality of process circuit in parallel is set, realize the processing of radio frequency recognizing electronic label echo-signal.The utility model is improved
Radio-frequency identification reader/writer recognizes the performance of radio frequency recognizing electronic label, is adapted to different complex environments.
After the detailed description that the utility model embodiment is read in conjunction with the figure, other features and advantage of the present utility model
It will become clearer.
Brief description of the drawings
, below will be to embodiment party in order to illustrate more clearly of the utility model embodiment or the technical scheme of prior art
The accompanying drawing used required in formula or description of the prior art is briefly described, it is therefore apparent that drawings in the following description are only
It is some embodiments described in the utility model, for those of ordinary skill in the art, is not paying creative labor
On the premise of dynamic, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is radio frequency recognizing electronic label echo signal processing circuit diagram in the embodiment of the utility model one.
Embodiment
The utility model is described in detail below with reference to each embodiment shown in the drawings.But these embodiments
The utility model is not intended to limit, structure, method or work(that one of ordinary skill in the art is made according to these embodiments
Conversion on energy is all contained in protection domain of the present utility model.
It should be noted that in various embodiments, identical label or mark may be used, but these not generations
Absolute contact relation in table structure or function.Also, " first ", " second ", " the 3rd " that is previously mentioned in each embodiment,
Also not representative structure or the absolute differentiation relation functionally such as " 4th ", these are merely for convenience of description.
As shown in figure 1, the embodiment radio frequency recognizing electronic label echo signal processing circuit diagram of the utility model one.
Radio frequency recognizing electronic label echo signal processing circuit may be in radio-frequency identification reader/writer, belong to radio-frequency identification reader/writer knowledge
A part for other circuit, to realize that the identification function of radio-frequency identification reader/writer plays critically important effect.Frequency identification electronic mark
Signing back ripple signal processing circuit includes antenna module 10, intermediate frequency network 20, signal processing unit 42.Antenna module 10 is acted on
In transceiving radio frequency signal, the related circuit of transceiver insulation is additionally included, in the present embodiment, antenna module 10 is used to receive
Radio frequency recognizing electronic label echo-signal.Specifically, antenna module 10 includes antenna 11 and receives network 12, and antenna 11 is according to reality
It the need for border, can be located at outside outside radio-frequency identification reader/writer, receive network 12 and be connected with antenna 11, radio-frequency identification reader/writer application
In the intelligent transportation scene such as vehicle identification, generally require to setting antenna 11 on multilane respectively, by 12 pairs of aerial network
Antenna 11 on different tracks carries out timesharing and used, in the present embodiment, receives network 12 by gating connection antenna all the way
11 receive echo-signal.As described above, in a preferred embodiment, isolating device, coupling can also be included in aerial network 12
Clutch part etc., is managed for the trend to receiving and transmitting signal.
Intermediate frequency network 20 is connected with antenna module 10, and it is to obtain echo-signal by antenna module 10 that it, which is acted on, and is utilized
Intermediate frequency network 20 obtains the intermediate-freuqncy signal in echo-signal.Specifically, intermediate frequency network 20 include demodulator 21, disconnecting switch 22,
Preamplifying circuit 23, demodulator 21, disconnecting switch 22, preamplifying circuit 23 are sequentially connected with.Demodulator 21 is to echo-signal
It is demodulated, the intermediate-freuqncy signal being modulated in echo-signal is demodulated to come.Using disconnecting switch 22, in radio-frequency identification reader/writer
Disconnecting switch 20 is closed when sending order so that link end is in high-impedance state, disconnecting switch is opened when receiving echo-signal
20, thus effectively avoids the vibration that the capacitor charge and discharge in link is produced so that intermediate frequency keeps constant with reference to DC component,
Correct, the Real-time demodulation of echo-signal are ensure that, it is suppressed that direct current offset, to isolation before and after realizing.Preamplifying circuit 23
Processing is amplified to corresponding intermediate-freuqncy signal, is easy to the signal transacting of circuit below.
Signal processing unit 42 is used to handle corresponding intermediate-freuqncy signal, and final realize is obtained in radio frequency recognizing electronic label
Label information.In order to better adapt to the interference that varying environment is caused, between intermediate frequency network 20 and signal processing unit 42 also
Single input and multi-output gating switch 301, multiple input single output gating switch 302 are provided with, above-mentioned gating switch can be specific
Control under, it is ensured that any one input and any one output end are turned on, and are with single input and multi-output gating switch 301
Example, by switching, signal can be from the input of single input and multi-output gating switch 301 to single input and multi-output gating switch
301 the first output end, can also be from the input of single input and multi-output gating switch 301 to single input and multi-output gating switch
301 the second output end, the like.
Straight-through branch is set respectively between single input and multi-output gating switch 301 and multiple input single output gating switch 302
Road, the first frequency range filtering circuit 31, the second frequency range filtering circuit 32, the 3rd frequency range filtering circuit 33, foregoing circuit is using in parallel
Set, i.e., by switching, corresponding intermediate-freuqncy signal can select any one branch road by and complete corresponding processing.Specifically
Ground, the input connection intermediate frequency network 20 of single input and multi-output gating switch 301, the i.e. output end with preamplifying circuit 23 connects
Connect.First input of the first output end connection multiple input single output gating switch 302 of single input and multi-output gating switch 301
End, the second output end of single input and multi-output gating switch 301 connects multiple input single output by the first frequency range filtering circuit 31
Second input of gating switch 302, the 3rd output end of single input and multi-output gating switch 301 filters out electricity by the second frequency range
3rd input of the connection multiple input single output gating switch of road 32 302, the 4th output of single input and multi-output gating switch 301
End connects the 4th input of multiple input single output gating switch 302, multiple input single output by the 3rd frequency range filtering circuit 33
The output end connection signal processing unit 42 of gating switch 302.Above-mentioned filtering circuit can suppress the filtering circuit passband with
Outer noise signal, it is preferable that configuration of the intermediate-freuqncy signal according to radio-frequency identification reader/writer to radio frequency recognizing electronic label, can be returned
The intermediate-freuqncy signal of different rates, therefore intermediate-freuqncy signal that can be respectively to different rates carries out corresponding processing, specifically, to low
Speed intermediate-freuqncy signal can use the first frequency range filtering circuit, and its passband can be 0Hz ~ 400KHz, and medium-rate intermediate frequency is believed
Number can use the second frequency range filtering circuit, its passband can be 20KHz ~ 1.2MHz, high-speed intermediate-freuqncy signal can be adopted
With the 3rd frequency range filtering circuit, its passband can be 20KHz ~ 2MHz, and on other occasions, intermediate-freuqncy signal can also pass through
Between first output end of single input and multi-output gating switch 301 and the first input end of multiple input single output gating switch 302
Straight-through branch road.
The switching of above-mentioned single input and multi-output gating switch 301 and multiple input single output gating switch 302 can be by cutting
Change unit 41 to control, switch unit 41 connects single input and multi-output gating switch 301 and multiple input single output gating switch respectively
302, with the conducting branches between control input and output.Preferably, switch unit 41 can carry out real according to different situations
When control, specifically according to radio-frequency identification reader/writer be sent to radio frequency recognizing electronic label configuration information control conducting branches.
By taking single input and multi-output gating switch 301 as an example, recognize that sensitivity is influenceed needs by particular surroundings in radio-frequency identification reader/writer
Using the recognition mode of low rate, now corresponding configuration information can be sent to radio frequency recognizing electronic label, and radio frequency identification is electric
Subtab is in returned data, rate transmission modulated intermediate-freuqncy signal of the meeting in configuration information.Now, in order to corresponding
Intermediate-freuqncy signal carry out noise suppressed, switch unit 41 can directly by the input of single input and multi-output gating switch 301 and
Second output end is turned on, and corresponding intermediate-freuqncy signal can complete phase by the conducting branches where the first frequency range filtering circuit 31
The noise processed answered.In the above-described embodiment, single input and multi-output gating switch 301 can export gating for single input four
Switch, multiple input single output gating switch 302 can be the single output gating switch of four inputs.
Preferably, single input and multi-output gating switch 301 also includes the 5th output end, multiple input single output gating switch
302 also include the 5th input, are opened in the 5th output end and the multiple input single output gating of single input and multi-output gating switch 301
Balanced device 34 is connected between the 5th input for closing 302, i.e., as single input and multi-output gating switch 301 and multi input
The 5th conducting branches between single output gating switch 302, can select to enter line amplitude to corresponding intermediate-freuqncy signal as needed
The correction of frequency characteristic, reduces the influence of intersymbol interference.
In addition, single input and multi-output gating switch 301 also includes the 6th output end, multiple input single output gating switch 302
Also include the 6th input, in the 6th output end and multiple input single output gating switch of single input and multi-output gating switch 301
Amplifier 35 is connected between 302 the 6th input, i.e., as single input and multi-output gating switch 301 and multi input list
The 6th conducting branches between gating switch 302 are exported, can select to do further enhanced processing to corresponding intermediate-freuqncy signal,
Ensure the treatment effect of signal processing unit 42 below.
In summary, the utility model sets single input and multi-output gating to open between intermediate frequency network and signal processing unit
Close and multiple input single output gating switch, set between single input and multi-output gating switch and multiple input single output gating switch
A plurality of process circuit in parallel, realizes the processing of radio frequency recognizing electronic label echo-signal.The utility model improves radio frequency knowledge
Other read write line recognizes the performance of radio frequency recognizing electronic label, is adapted to different complex environments.
It should be understood that, although the present specification is described in terms of embodiments, but not each embodiment only includes one
Individual independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art will should say
Bright book is as an entirety, and the technical scheme in each embodiment may also be suitably combined to form those skilled in the art can
With the other embodiment of understanding.
The a series of tool described in detail only for feasibility embodiment of the present utility model of those listed above
Body illustrates that they are simultaneously not used to limit protection domain of the present utility model, all to be made without departing from the utility model skill spirit
Equivalent implementations or change should be included within protection domain of the present utility model.
Claims (10)
1. a kind of radio frequency recognizing electronic label echo signal processing circuit, it is characterised in that including：
For receiving the antenna module of echo-signal and the intermediate frequency network of the connection antenna module, the intermediate frequency network is used to obtain
Take the intermediate-freuqncy signal in echo-signal；
Single input and multi-output gating switch and the multiple input single output gating coordinated with the single input and multi-output gating switch are opened
Close, the input of the single input and multi-output gating switch connects the intermediate frequency network, the single input and multi-output gating switch
The first output end connect the first input end of the multiple input single output gating switch, the single input and multi-output gating switch
The second output end the second input of the multiple input single output gating switch is connected by the first frequency range filtering circuit, it is described
3rd output end of single input and multi-output gating switch connects the multiple input single output by the second frequency range filtering circuit and gated
3rd input of switch, the 4th output end of the single input and multi-output gating switch is connected by the 3rd frequency range filtering circuit
4th input of the multiple input single output gating switch, the output end connection signal of the multiple input single output gating switch
Processing unit, the signal processing unit is used to handle corresponding label information；
Switch unit, the switch unit connects the single input and multi-output gating switch respectively and multiple input single output gating is opened
Close with the conducting branches between control input and output.
2. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that the list is defeated
Enter multi output gating switch be single input four output gating switch and/or the multiple input single output gating switch be four input lists
Export gating switch.
3. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that the antenna
Component includes the reception network of antenna and the connection antenna, and by gating connection, antenna receives echo to the reception network all the way
Signal.
4. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that in described
Frequency network includes connecting the demodulator of the antenna module, the disconnecting switch of the connection demodulator and connects the disconnecting switch
Preamplifying circuit.
5. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that described first
The passband of frequency range filtering circuit is 0Hz ~ 400KHz.
6. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that described second
The passband of frequency range filtering circuit is 20KHz ~ 1.2MHz.
7. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that the described 3rd
The passband of frequency range filtering circuit is 20KHz ~ 2MHz.
8. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that the list is defeated
The 5th output end for entering multi output gating switch connects the 5th input of the multiple input single output gating switch by balanced device
End.
9. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that the list is defeated
The 6th output end for entering multi output gating switch connects the 6th input of the multiple input single output gating switch by amplifier
End.
10. radio frequency recognizing electronic label echo signal processing circuit according to claim 1, it is characterised in that described to cut
Change the configuration information control conducting branches that unit is sent to radio frequency recognizing electronic label according to radio-frequency identification reader/writer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720201567.4U CN206594691U (en) | 2017-03-03 | 2017-03-03 | Radio frequency recognizing electronic label echo signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720201567.4U CN206594691U (en) | 2017-03-03 | 2017-03-03 | Radio frequency recognizing electronic label echo signal processing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206594691U true CN206594691U (en) | 2017-10-27 |
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ID=60126873
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720201567.4U Active CN206594691U (en) | 2017-03-03 | 2017-03-03 | Radio frequency recognizing electronic label echo signal processing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113965239A (en) * | 2021-12-06 | 2022-01-21 | 青岛歌尔智能传感器有限公司 | Radio frequency signal transmission control method and device and radio frequency system |
-
2017
- 2017-03-03 CN CN201720201567.4U patent/CN206594691U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113965239A (en) * | 2021-12-06 | 2022-01-21 | 青岛歌尔智能传感器有限公司 | Radio frequency signal transmission control method and device and radio frequency system |
| CN113965239B (en) * | 2021-12-06 | 2024-04-26 | 青岛歌尔智能传感器有限公司 | Radio frequency signal transmission control method and device and radio frequency system |
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