CN108595994A - Super high frequency radio frequency identification label signal demodulating equipment - Google Patents
Super high frequency radio frequency identification label signal demodulating equipment Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
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- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
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- H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
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Abstract
The invention discloses a kind of ultrahigh frequency RFID label signal demodulator circuit devices, including detection mechanism, the demodulating mechanism with multi signal access, comparator and processor；Processor is according to the current state of read-write equipment, control demodulating mechanism gating current demand signal access corresponding with current state；The two-way obtained according to label return signal signal to be demodulated is sent to demodulating mechanism by detection mechanism；By demodulating mechanism under current demand signal access gating condition, two-way processing signal is obtained to two-way signal to be demodulated and gives comparator；The obtained corresponding demodulated signal of label return signal after being compared to two-way processing signal is sent to processor by comparator.Realize rectified signal full dynamic range, being all-trans completely demodulates to speed range, avoid the occurrence of the high state for being difficult to demodulating and decoding when returning bit rate, avoid after carrying out AD acquisitions, the algorithm for carrying out large amount of complex could be completed to demodulate to label return signal.
Description
Technical field
The present invention relates to Signal Regulation technical fields, and in particular to a kind of super high frequency radio frequency identification (Radio Frequency
Identification, RFID) label signal demodulating equipment..
Background technology
The core component of ultrahigh frequency RFID read-write equipment system is ultrahigh frequency RFID electronic tag and electronic tag
Read-write equipment.Read-write equipment emits the radio wave electron label of specific frequency, to drive electronic tag circuit will be internal
Data send out, while received in sequence and demodulating label data, thus obtain the data stored in electronic tag.
Currently, after RFID read-write equipment receives the signal that label returns, the method pair of RF envelope detection is mostly used greatly
Signal is demodulated, but it needs to face problems with：
1) since the forward emitting power domain of walker of RFID read-write equipment is larger, and usually transmission power is very big, to subtract
The influence that small carrier wave handles follow-up signal will generally carry out carrier wave elimination, and carrier wave eliminates result by load condition, antenna
With influences such as degree, when transmission power is very big, carrier cancellation circuit effect is limited, can not be by detection width under all transmission powers
Degree is limited in the range of a very little, therefore the dynamic range of signals after detection is larger.
2) when the processing such as being filtered, amplify to signal after detection, processing circuit response time, the distortion factor will necessarily be introduced
Etc. influence factors, for the signal that dynamic range is larger, under different conditions, influence degree differs：Since RFID read-write equipment is adopted
With half-duplex operating mode, (the code stand-by period is returned when the response time of circuit is more than returning the code stand-by period for read-write equipment signal：
That is signaling signal and the time interval for returning code signal, reverse rate is bigger, and it is shorter to return the code stand-by period), signaling signal processing is dynamic
It does not complete, the waveform for subsequently returning code signal will be had an impact, detected amplitude is bigger, then influences more serious, in fact it could happen that hair
Code signal falls into oblivion back the state of code signal completely.When RFID read-write equipment reversely returns bit rate difference, signal distortion is different.
3) RF envelope detection is used to carry out the read-write equipment of signal demodulation, after the completion of demodulator circuit signal processing, due to
Input signal difference, output waveform differ greatly, and need to carry out AD acquisitions mostly, and design largely again on signal processing software
Miscellaneous algorithm could be completed to decode, decoding software difficulty be significantly increased to label signal, inevitable also to occupy a large amount of processor
Resource increases processor cost.And the circuit acquired without AD, it is more difficult for the decoding process of signal, easily occur
The state of certain frequency band signals can only be demodulated.But since dynamic range of signals is larger, for part signal, demodulation process is not perfect,
It cannot complete to decode by software algorithm, the reverse signal of high-speed occur, the more difficult phenomenon of decoding greatly reduces
Read-write equipment performance.
Therefore, make it to RFID read-write equipment full dynamic range, the return signal being all-trans into speed range processing output
Waveform has high consistency, to improve accuracy, the demodulator circuit adaptability of the demodulation of read-write equipment reverse link signal, signal
Handling result output amplitude is constant, waveform stabilization, reach can be sent directly into processor I/O interfaces processing, need not move through into
Row AD acquisitions.It is undesirable to solve demodulation result when high time bit rate, it is difficult to the problem of decoding, while output signal is convenient for follow-up place
Device decoding is managed, without complicated data processing algorithm, the reduction decoding software difficulty of high degree reduces processor cost, is
Those skilled in the art's technical problem urgently to be resolved hurrily.
Invention content
For problem present in customer service the relevant technologies at least to some extent, the purpose of the present invention is to provide a kind of superelevation
Frequency RFID tag signal demodulating circuit device,
To achieve the above object, the present invention provides a kind of ultrahigh frequency RFID label signal demodulator circuit device, including detection
Mechanism, the demodulating mechanism with multi signal access, comparator and processor；
The detection mechanism, the demodulating mechanism, the comparator and the processor are sequentially connected；
The demodulating mechanism is also connected with the processor；
The processor controls the demodulating mechanism gating and the current state pair according to the current state of read-write equipment
The current demand signal access answered；
The first signal to be demodulated obtained according to label return signal and the second signal to be demodulated are sent out by the detection mechanism
Give the demodulating mechanism；
The demodulating mechanism is used under the current demand signal access gating condition, is carried out to the described first signal to be demodulated
The the first processing signal obtained after processing, and, the second processing letter obtained after handling the described second signal to be demodulated
Number, and the first processing signal and the second processing signal are sent to the comparator；
The comparator by it is described first processing signal and second processing signal be compared after the obtained mark
The corresponding demodulated signal of label return signal is sent to the processor.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, the demodulating mechanism is by multistage phase successively
Sub- regulating mechanism even is formed；
Every grade of sub- regulating mechanism includes filter circuit and the amplifying circuit that is connected with the filter circuit；
Next stage amplifying circuit is also connected with upper level filter circuit；
Each filter circuit is connected with the processor；
Final stage amplifying circuit in final stage grade subsolution regulating mechanism is also connected with the comparator；
The filter circuit includes a plurality of signal path.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, the amplifying circuit includes two-way operation
Amplifying circuit or calculus of differences amplifying circuit.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, putting in every grade of sub- regulating mechanism
Big circuit is realized using identical tertiary circuit structure.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, putting in every grade of sub- regulating mechanism
Big circuit is realized using the 4th different circuit structures.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, per signal paths using identical the
One circuit structure is realized；
Each first circuit structure is corresponding with different circuit configuration parameters.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, first circuit structure is using RC electricity
It realizes on road.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, per signal paths using different the
Two circuit structures are realized.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, the detection mechanism passes through to the mark
Two geophone intervals of return signal are signed from wavelength control is carried out, make the described first signal to be demodulated and second letter to be demodulated
Number opposite in phase.
Further, in ultrahigh-frequency tag signal demodulating equipment described above, the phase of first signal to be demodulated
Phase difference with the second signal to be demodulated is 180 °.
The ultrahigh frequency RFID label signal demodulating equipment of the present invention, by processor according to the current state of read-write equipment,
It controls demodulating mechanism and gates current demand signal access corresponding with current state, so that regulating mechanism is in current demand signal path condition
Under, at the first signal to be demodulated and the second signal to be demodulated that are obtained according to current label return signal to detection mechanism
Reason obtains the first processing signal and second processing signal, then handles signal and the progress of second processing signal by comparator pair first
After obtain the corresponding demodulated signal of current label return signal it is complete to realize rectified signal so that processor is acquired
Dynamic range, being all-trans completely demodulates to speed range, avoids the occurrence of the high state that demodulating and decoding is difficult to when returning bit rate, avoid into
After row AD acquisitions, the algorithm for carrying out large amount of complex could be completed to demodulate to label return signal.
Description of the drawings
Fig. 1 is the structural schematic diagram of the ultrahigh frequency RFID label signal demodulating equipment embodiment one of the present invention；
Fig. 2 is the structural schematic diagram of ultrahigh frequency RFID label signal demodulating equipment embodiment two of the present invention；
Fig. 3 is the circuit diagram of Fig. 2.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
The present embodiment technical solution is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only this implementation
Example a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
There is the every other embodiment obtained under the premise of making creative work, belongs to the range of the present embodiment protection.
The (if present)s such as term " first ", " second " in specification and claims and above-mentioned attached drawing are to be used for area
Not similar part, without being used to describe specific sequence or precedence.It should be appreciated that the data used in this way are appropriate
In the case of can be interchanged, so that embodiments herein described herein can be real with the sequence other than illustrating herein
It applies.
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
Fig. 1 is the structural schematic diagram of the ultrahigh frequency RFID label signal demodulating equipment embodiment one of the present invention, such as Fig. 1 institutes
Show, the ultrahigh frequency RFID label signal demodulating equipment of the present embodiment may include detection mechanism 10, the solution with multi signal access
Regulating mechanism 11, processor 12 and comparator 13.Wherein, detection mechanism 10, demodulating mechanism 11, comparator 13 and processor 12 according to
It is secondary to be connected；Demodulating mechanism 11 is also connected with processor 12.
During specific implementation at one, when read-write equipment emits the radio wave electron label of specific frequency, processing
Device 12 can know the current state of read-write equipment, such as the specific frequency of read-write equipment transmitting, time code stand-by period in real time.This
Sample, after ultrahigh frequency RFID electronic tag generates current label return signal, processor 12 can be according to the current of read-write equipment
State, control demodulating mechanism 11 gate current demand signal access corresponding with current state.It can be first with detection mechanism 10 to mark
Label return signal is handled, and obtains the first signal to be demodulated and the second signal to be demodulated, and by the first signal to be demodulated and the
Two signals to be demodulated are sent to demodulating mechanism 11, by demodulating mechanism 11 under current demand signal access gating condition, wait solving to first
The the first processing signal obtained after adjusting signal to be handled, and, second obtained after handling the second signal to be demodulated
Signal is handled, and the first processing signal and second processing signal are sent to comparator 13.
In the present embodiment, can according to the dynamic range of the signal obtained after detection, reversely return the features such as code signal rate,
In conjunction with the major influence factors during demodulated signal, a plurality of signal path of circuit design is set for demodulating mechanism 11, it is different
The signal obtained after the corresponding detection of signal path is different.For example, using identical first circuit knot per signal paths
Structure realizes that each first circuit structure is corresponding with different circuit configuration parameters, and such as the first circuit structure is realized using RC circuits.
Alternatively, according to the multiple and different second circuit knot of the parameter designings such as the frequency, domain of walker, stand-by period of label return signal
Structure so that realized using different second circuit structures per signal paths.Therefore the circuit characteristic of each signal paths is different,
Carry out differentiation processing to each condition input signals, achievees the purpose that the high consistency of signal output waveform.In this way, demodulating mechanism
11 under current demand signal access gating condition, the first processing signal obtained after handling the first signal to be demodulated, and,
It when the second processing signal obtained after handling the second signal to be demodulated, is influenced smaller, is kept away by dynamic range of signals
Exempt from the action of signaling signal processing not completing, the waveform for subsequently returning code signal will be had an impact, it is complete to avoid the occurrence of signaling signal
The state of code signal is fallen into oblivion back, the distortion factor of the first processing signal and second processing signal is reduced, to realize that rectified signal is complete
Dynamic range, being all-trans completely demodulates to speed range, and the state of demodulating and decoding is difficult to when avoiding the occurrence of high time bit rate.
Demodulating mechanism 11 is by the first processing signal and after second processing signal is sent to comparator 13, by comparator 13 to the
One processing signal and second processing signal are compared, and to restore the label return signal of constant amplitude, and the amplitude is permanent
The waveform of fixed label return signal is not varied widely with reasons such as dynamic ranges, at this point it is possible to which amplitude is consolidated
Fixed label return signal is sent to processor as the corresponding demodulated signal of current label return signal, and by the demodulated signal
12 I/O interfaces, are directly acquired demodulated signal by processor 12, without carrying out AD acquisitions.
The ultrahigh frequency RFID label signal demodulating equipment of the present embodiment, by processor 12 according to the current shape of read-write equipment
State, control demodulating mechanism 11 gates current demand signal access corresponding with current state, so that demodulating mechanism 11 is logical in current demand signal
Under the conditions of road, the first signal to be demodulated and the second signal to be demodulated that detection mechanism 10 is obtained according to current label return signal
It is handled, obtains the first processing signal and second processing signal, then by comparator 13 to the first processing signal and second processing
Signal obtains the corresponding demodulated signal of current label return signal after being compared, so that processor 12 is acquired, realize
Rectified signal full dynamic range, being all-trans completely demodulates to speed range, and demodulating and decoding is difficult to when avoiding the occurrence of high time bit rate
State avoids after carrying out AD acquisitions, and the algorithm for carrying out large amount of complex could be completed to demodulate to label return signal.
Fig. 2 is the structural schematic diagram of ultrahigh frequency RFID label signal demodulating equipment embodiment two of the present invention, as shown in Fig. 2,
On the basis of the ultrahigh frequency RFID label signal demodulating equipment embodiment shown in Fig. 1 of the present embodiment, further in further detail
Technical scheme of the present invention is described.
As shown in Fig. 2, the subsolution regulating mechanism 111 that demodulating mechanism 11 is sequentially connected by multistage in the present embodiment is formed；Every grade
Subsolution regulating mechanism 111 includes filter circuit 1111 and the amplifying circuit 1112 being connected with filter circuit 1111；The amplification of next stage
Circuit 1112 is also connected with the filter circuit of upper level 1111；Each filter circuit 1111 is connected with processor 12；Final stage grade
Final stage amplifying circuit in demodulating mechanism 111 is also connected with comparator 13；Filter circuit 1111 includes a plurality of signal path.Its
In, the amplifying circuit 1112 in every grade of subsolution regulating mechanism 111 is realized using identical tertiary circuit structure, alternatively, every grade of subsolution
Amplifying circuit 1112 in regulating mechanism 111 is realized using the 4th different circuit structures.
As shown in Fig. 2, the present embodiment is described technical scheme of the present invention by taking two-stage subsolution regulating mechanism 111 as an example,
In practical applications, the number of subsolution regulating mechanism 111 can be set according to actual demand.Detection mechanism 10 is by returning to label
Two geophone intervals of signal make the opposite in phase of the first signal to be demodulated and the second signal to be demodulated from wavelength control is carried out.
For example, the phase difference of the phase of the first signal to be demodulated and the second signal to be demodulated is 180 °.The filter circuit 1111 of the first order
Under the current demand signal path condition that processor 12 selects, signal is carried out to the first signal to be demodulated and the second signal to be demodulated
Debiasing and after being filtered, carries out first time enhanced processing, and when enhanced processing does not change signal phase.First time signal amplifies
After the completion, it to ensure signal waveform, is filtered again by the filter circuit 1111 of the second level, wherein the filter of the second level
Wave circuit 1111 is consistent with 1111 structure of filter circuit and parameter of the first order.After the completion of second is handled, to ensure to be handled
Signal reaches larger amplitude angle value, need to carry out secondary amplification by the feeding amplifying circuit 1112 of the second level, enhanced processing does not change letter
Number phase.After signal completes secondary amplification, the first processing signal and second processing signal of two opposite in phase are obtained, and by two
After road signal feeding comparator 13 is compared, outgoing label return signal waveform is obtained, and ensure that signal output amplitude is constant.Compare
Treated that amplitude output signal is constant for device 13, and signal waveform is not varied widely with reasons such as dynamic ranges,
Directly I/O mouthfuls can be handled using control be acquired processing.Wherein, processor 12 is preferably based on field programmable gate array
(Field-Programmable Gate Array, FPGA) plate is realized.
Fig. 3 is the circuit diagram of Fig. 2, as shown in figure 3, RC circuit realities may be used in the present embodiment per signal paths
It is existing.Wherein, the major influence factors of RC circuits are influence and RC circuit of the RC time constants to the response time to flowing through letter
Number the distortion factor influence：Different reverse link rates, time code stand-by period is different, and reverse link rate is bigger, the stand-by period
It is shorter；Under same RC parameters, reverse link rate is smaller, and signal distortion is more serious；In this RC circuit, when to accelerate to respond
Between, it usually needs C values are smaller, but when the reduction of C values, low-frequency range waveform is easily distorted.
In circuit shown in Fig. 3, after considering response time and distortion factor influence, when filter circuit 1111 is waited for returning code
Between (i.e. reverse rate size) be primary reference point, it is 4 grades that filter circuit 1111, which is divided, since circuit structure is consistent,
Each gear circuit configuration parameter is different.4 gears are respectively：64K is 1 grade, returns code stand-by period 15.625us；128K~
5.729~7.8125us of code stand-by period is returned in 2 grades of the positions 174.55K；274.29K~349.09K is three gears, returns the code stand-by period
2.864~3.645us；Code stand-by period 1.5625us is returned in 4 grades of the positions 640K.The RC parameter configurations of each gear meet：Full inspection wave
In dynamic range of signals, the signaling signal processing response time returns the code stand-by period no more than the gear minimum；All times of the gear
There is not serious distortion in the signal waveform of bit rate.
Two groups of signals to be demodulated that the processing of detection mechanism 10 obtains are initially entered RC circuits to carry out at debiasing and filtering
After reason, into the two-way operational amplification circuit 1112 in Fig. 3, processing is amplified to the amplitude of two groups of signals, completes the first order
Processing, later, into the RC circuits of the second level in Fig. 3, after being handled by RC circuits, enter back into check the mark amplifying circuit 1112 into
Row processing, enters back into comparator 13 and is handled, finally obtain the corresponding demodulated signal of current label return signal by processor
12 pairs of demodulated signals are acquired.
It should be noted that in order to further ensure exporting result stability, in practical applications, comparator 13 can be
Two, after first comparator 13 obtains demodulated signal, second comparator 13 is inputted, by demodulated signal and a fixed thresholding
Information of voltage is compared, so that obtained demodulated signal is more stablized.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (10)
1. a kind of super high frequency radio frequency identification label signal demodulating circuit device, which is characterized in that including detection mechanism, there are more letters
Demodulating mechanism, comparator and the processor of number access；
The detection mechanism, the demodulating mechanism, the comparator and the processor are sequentially connected；
The demodulating mechanism is also connected with the processor；
It is corresponding with the current state to control the demodulating mechanism gating according to the current state of read-write equipment for the processor
Current demand signal access；
Obtained according to label return signal first signal to be demodulated and the second signal to be demodulated are sent to by the detection mechanism
The demodulating mechanism；
The demodulating mechanism is used under the current demand signal access gating condition, is handled the described first signal to be demodulated
The the first processing signal obtained afterwards, and, the second processing signal obtained after handling the described second signal to be demodulated, and
Signal is handled by described first and the second processing signal is sent to the comparator；
The comparator returns the obtained label after being compared to the first processing signal and second processing signal
A number corresponding demodulated signal of writing in reply is sent to the processor.
2. ultrahigh-frequency tag signal demodulating equipment according to claim 1, which is characterized in that the demodulating mechanism is by multistage
The sub- regulating mechanism being sequentially connected is formed；
Every grade of sub- regulating mechanism includes filter circuit and the amplifying circuit that is connected with the filter circuit；
Next stage amplifying circuit is also connected with upper level filter circuit；
Each filter circuit is connected with the processor；
Final stage amplifying circuit in final stage grade subsolution regulating mechanism is also connected with the comparator；
The filter circuit includes a plurality of signal path.
3. ultrahigh-frequency tag signal demodulating equipment according to claim 2, which is characterized in that the amplifying circuit includes double
Road operational amplification circuit or calculus of differences amplifying circuit.
4. ultrahigh-frequency tag signal demodulating equipment according to claim 2, which is characterized in that every grade of sub- regulating mechanism
In amplifying circuit using identical tertiary circuit structure realize.
5. ultrahigh-frequency tag signal demodulating equipment according to claim 4, which is characterized in that every grade of sub- regulating mechanism
In amplifying circuit realized using different the 4th circuit structure.
6. ultrahigh-frequency tag signal demodulating equipment according to claim 1, which is characterized in that use phase per signal paths
The first same circuit structure is realized；
Each first circuit structure is corresponding with different circuit configuration parameters.
7. ultrahigh-frequency tag signal demodulating equipment according to claim 6, which is characterized in that first circuit structure is adopted
It is realized with RC circuits.
8. ultrahigh-frequency tag signal demodulating equipment according to claim 1, which is characterized in that per signal paths using not
Same second circuit structure is realized.
9. according to any ultrahigh-frequency tag signal demodulating equipments of claim 1-8, which is characterized in that the detection mechanism
By two geophone intervals to the label return signal from wavelength control is carried out, make the described first signal to be demodulated and described
The opposite in phase of second signal to be demodulated.
10. ultrahigh-frequency tag signal demodulating equipment according to claim 9, which is characterized in that first letter to be demodulated
Number the phase difference of phase and the second signal to be demodulated be 180 °.
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| CN201810376686.2A CN108595994A (en) | 2018-04-25 | 2018-04-25 | Super high frequency radio frequency identification label signal demodulating equipment |
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| CN201810376686.2A CN108595994A (en) | 2018-04-25 | 2018-04-25 | Super high frequency radio frequency identification label signal demodulating equipment |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03158016A (en) * | 1989-11-15 | 1991-07-08 | Sanyo Electric Co Ltd | Am radio receiver |
| US5847662A (en) * | 1994-12-27 | 1998-12-08 | Kabushiki Kaisha Toshiba | Radio card communication apparatus |
| US20040116788A1 (en) * | 2002-08-07 | 2004-06-17 | Orsense Ltd | Method and system for decomposition of multiple channel signals |
| CN101320419A (en) * | 2008-06-26 | 2008-12-10 | 桂林瀚特信息产业有限公司 | Ultrahigh frequency RFID label reader-writer |
| US20090224887A1 (en) * | 2008-03-10 | 2009-09-10 | Arash Sadeghfam | Adjustable circuit and rfid reader device |
| DE102008013468A1 (en) * | 2008-03-10 | 2009-09-17 | Pepperl + Fuchs Gmbh | Adjustable filtering circuit for use in radio frequency identification reader device, has band-stop filter arranged in downstream side of one of the mixing stages, for suppressing carrier signal in intermediate frequency signal |
| CN102611393A (en) * | 2011-12-26 | 2012-07-25 | 深圳市虹远通信有限责任公司 | Radio frequency power amplifier system having waveband switching function |
| EP2564229A2 (en) * | 2010-04-26 | 2013-03-06 | Cambridge Enterprise Limited | Rfid tag location systems |
| CN105335768A (en) * | 2014-08-14 | 2016-02-17 | 杭州中瑞思创科技股份有限公司 | Universal carrier wave elimination module suitable for ultrahigh-frequency reading and writing device and carrier wave elimination method for ultrahigh-frequency reading and writing device |
| CN105846834A (en) * | 2016-03-14 | 2016-08-10 | 青岛海信移动通信技术股份有限公司 | Radio-frequency signal filtering method and wireless communication equipment |
| CN205901722U (en) * | 2016-08-19 | 2017-01-18 | 江苏本能科技有限公司 | Radio frequency identification zero intermediate frequency receiver |
| CN107392071A (en) * | 2017-06-27 | 2017-11-24 | 苏州沃古斯电子商务有限公司 | A kind of novel ultra-high frequency reader |
| CN107733472A (en) * | 2017-10-26 | 2018-02-23 | 江苏本能科技有限公司 | The adaptive method to set up of radio frequency identification frequency and system, control device |
| CN208421836U (en) * | 2018-04-25 | 2019-01-22 | 昆明联诚科技股份有限公司 | Super high frequency radio frequency identification label signal demodulating equipment |
-
2018
- 2018-04-25 CN CN201810376686.2A patent/CN108595994A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03158016A (en) * | 1989-11-15 | 1991-07-08 | Sanyo Electric Co Ltd | Am radio receiver |
| US5847662A (en) * | 1994-12-27 | 1998-12-08 | Kabushiki Kaisha Toshiba | Radio card communication apparatus |
| US20040116788A1 (en) * | 2002-08-07 | 2004-06-17 | Orsense Ltd | Method and system for decomposition of multiple channel signals |
| US20090224887A1 (en) * | 2008-03-10 | 2009-09-10 | Arash Sadeghfam | Adjustable circuit and rfid reader device |
| DE102008013468A1 (en) * | 2008-03-10 | 2009-09-17 | Pepperl + Fuchs Gmbh | Adjustable filtering circuit for use in radio frequency identification reader device, has band-stop filter arranged in downstream side of one of the mixing stages, for suppressing carrier signal in intermediate frequency signal |
| CN101320419A (en) * | 2008-06-26 | 2008-12-10 | 桂林瀚特信息产业有限公司 | Ultrahigh frequency RFID label reader-writer |
| EP2564229A2 (en) * | 2010-04-26 | 2013-03-06 | Cambridge Enterprise Limited | Rfid tag location systems |
| CN102611393A (en) * | 2011-12-26 | 2012-07-25 | 深圳市虹远通信有限责任公司 | Radio frequency power amplifier system having waveband switching function |
| CN105335768A (en) * | 2014-08-14 | 2016-02-17 | 杭州中瑞思创科技股份有限公司 | Universal carrier wave elimination module suitable for ultrahigh-frequency reading and writing device and carrier wave elimination method for ultrahigh-frequency reading and writing device |
| CN105846834A (en) * | 2016-03-14 | 2016-08-10 | 青岛海信移动通信技术股份有限公司 | Radio-frequency signal filtering method and wireless communication equipment |
| CN205901722U (en) * | 2016-08-19 | 2017-01-18 | 江苏本能科技有限公司 | Radio frequency identification zero intermediate frequency receiver |
| CN107392071A (en) * | 2017-06-27 | 2017-11-24 | 苏州沃古斯电子商务有限公司 | A kind of novel ultra-high frequency reader |
| CN107733472A (en) * | 2017-10-26 | 2018-02-23 | 江苏本能科技有限公司 | The adaptive method to set up of radio frequency identification frequency and system, control device |
| CN208421836U (en) * | 2018-04-25 | 2019-01-22 | 昆明联诚科技股份有限公司 | Super high frequency radio frequency identification label signal demodulating equipment |
Non-Patent Citations (8)
| Title |
|---|
| MUKHERJEE，S ET AL: "chipless radio frequency identification （RFID） device", PROCEEDINGS OF THE 1ST RFID EURASIA CONFERENCE, 1 January 2007 (2007-01-01) * |
| 彭昊 等: "多通道高保真音频信号ⅡR滤波器设计", 电子技术应用, vol. 41, no. 11, 31 December 2015 (2015-12-31) * |
| 李阳 等: "一种高动态范围、低功耗UHF RFID标签解调器的设计", 中国集成电路, no. 09 * |
| 王善进 等: "基于零中频接收技术的RFID阅读器射频电路单元的设计", 计算机测量与控制, no. 03, 25 March 2010 (2010-03-25) * |
| 王苗苗: "联合锋电位和局部场电位的视觉信息整合特性研究", 中国优秀硕士论文电子期刊 基础科学;医药卫生科技;信息科技, 15 January 2016 (2016-01-15) * |
| 郭海岛 等: "超高频电子标签读写器的设计", 黑龙江科技信息, no. 28, 5 October 2008 (2008-10-05) * |
| 齐晓辉 等: "基于多相滤波器的高分辨率信道化接收机设计", 现代雷达, no. 01, 15 January 2013 (2013-01-15) * |
| 龚广伟 等: "基于FPGA的多通道校准算法同步实现", 电子产品世界, no. 07, 4 July 2009 (2009-07-04) * |
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