CN108416242A - A kind of low frequency RFID reader and its resonant parameter method of adjustment of adaptive environment - Google Patents
A kind of low frequency RFID reader and its resonant parameter method of adjustment of adaptive environment Download PDFInfo
- Publication number
- CN108416242A CN108416242A CN201810204422.9A CN201810204422A CN108416242A CN 108416242 A CN108416242 A CN 108416242A CN 201810204422 A CN201810204422 A CN 201810204422A CN 108416242 A CN108416242 A CN 108416242A
- Authority
- CN
- China
- Prior art keywords
- real
- time
- rfid reader
- low frequency
- electronic switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 15
- 238000005520 cutting process Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- G06K7/10198—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 setting parameters for the interrogator, e.g. programming parameters and operating modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of low frequency RFID reader of adaptive environment and its resonant parameter methods of adjustment, it is related to radio frequency arts, the application adds impedance adjustment resistance and resonance adjustment capacitance in the circuit structure of traditional low frequency RFID reader, and automatically switched come matching capacitance and resistance using phaselocked loop driving source and electronic switching circuit, equipment powers on initially every time, internal MCU will be detected and be adjusted resonant parameter automatically, so that Antenna Operation is under optimal state, reduce influence of the environment to low frequency RFID reader, realize environment self-adaption, the switch speed of electronic switching circuit is very fast simultaneously, it will not influence the normal use of low frequency RFID reader.
Description
Technical field
The present invention relates to radio frequency arts, the low frequency RFID reader and its resonance of especially a kind of adaptive environment are joined
Number adjusting method.
Background technology
Low frequency RF ID (Radio Frequency Identification, radio frequency identification) reader makes in daily life
With extensive, for example, gate inhibition, animals and plants management etc..Please refer to Fig.1 the circuit diagram shown, the basis knot of low frequency RFID reader
Structure is a series resonant circuit being made of inductance L1, capacitance C1 and resistance R1, and inductance L1 is antenna, this antenna L1
It is both transmitting antenna and reception antenna, antenna L1 is powered by coupled magnetic field to the low frequency tags in magnetic field, while also being led to
The variation for crossing analysis coupled magnetic field achievees the purpose that communication.
Under normal circumstances, inductance L1 and the matching of capacitance C1 and resistance R1 have been adjusted when low frequency RFID reader appears on the scene
It is whole to arrive the most optimized parameter, in short distance low frequency RFID reader in use, user there environment is having slight change influences
Smaller, user can ignore this influence substantially；But in large-scale remote low frequency RFID reader in use, environmental change often
Unexpectedly, such as surrounding has metal hand rail, ferromagnetic medium etc., and the antenna in large-scale remote low frequency RFID reader
Area is bigger, since antenna itself is the air core coil of a pure inductance, be put into antenna range any metal or
Ferromagnetic medium can all influence the inductance value and AC impedance of antenna, thus the antenna in such reader be easier by it is extraneous its
The influence of his medium, the resonant parameter adjusted when to destroy appearance influence the reading effect and normal use of reader.
Invention content
The present inventor is regarding to the issue above and technical need, it is proposed that a kind of low frequency RFID reader of adaptive environment and
Its resonant parameter method of adjustment, low frequency RFID reader disclosed in the present application use phaselocked loop driving source and electronic switching circuit certainly
Dynamic switching comes matching capacitance and resistance so that equipment powers on initial adjust automatically resonant parameter every time, allows Antenna Operation optimal
In the environment of change.
Technical scheme is as follows：
A kind of low frequency RFID reader of adaptive environment, the low frequency RFID reader include：Driving source, fixed resistance,
Fixed antenna, fixed capacity, the first impedance adjustment resistance, the second impedance adjustment resistance, n resonance adjustment capacitance, microcontroller list
First MCU and n+2 electronic switching circuit, driving source have phase-locked loop characteristics, and each electronic switching circuit respectively includes just defeated
Enter end, negative input end and two output ends, and electronic switching circuit is connected with open type switch, n between the two outputs
For positive integer；The anode of driving source is connected to cathode, fixed day after being sequentially connected in series fixed resistance, fixed antenna and fixed capacity
The common end of line and fixed capacity is connected to MCU, and each component that adjusts is corresponding with an electronic switching circuit respectively, each to adjust
Component is composed in series series circuit with the open type switch in corresponding electronic switching circuit respectively, adjusts one end of component
An output end of corresponding electronic switching circuit is connected as the first end of series circuit, the other end, electronic switching circuit
Second end of another output end as series circuit, adjustment component include the first impedance adjustment resistance, the second impedance adjustment electricity
Resistance and n resonance adjust capacitance；The series circuit that first impedance adjustment resistance and corresponding electronic switching circuit form with it is solid
Determine resistor coupled in parallel, the series circuit that the second impedance adjustment resistance is formed with corresponding electronic switching circuit is in parallel with fixed resistance,
The series circuit that each resonance adjustment capacitance is formed with corresponding electronic switching circuit is in parallel with fixed capacity respectively, and first
The negative input end of impedance adjustment resistance and the corresponding n+1 electronic switching circuit of n resonance adjustment capacitance is respectively connected with, and second
The negative input end of the corresponding electronic switching circuit of impedance adjustment resistance is hanging, the positive input terminal difference of n+2 electronic switching circuit
Connect MCU.
A kind of resonant parameter method of adjustment of low frequency RFID reader adaptive environment, this method are applied to above-mentioned adaptive
In the low frequency RFID reader of environment, this method includes：
The state of n+2 electronic switching circuit is controlled according to the resonant parameter of storage；
Start driving source, determines that low frequency RFID reader is carried out according to resonant parameter under the present circumstances after Frequency Locking
The real-time working characteristic of work, and detect whether real-time working characteristic meets preset requirement, real-time working characteristic includes at least low
The real-time frequency and real not time circuit quality factor of frequency RFID reader；
If real-time working characteristic does not meet preset requirement, low frequency is adjusted by adjusting the state of each electronic switching circuit
The resonant parameter of RFID reader, until the error between the real-time working characteristic and preset requirement of low frequency RFID reader is minimum
Shi Qidong peak value frequency points automatically begin to work.
Its further technical solution is to determine that low frequency RFID reader carries out work according to resonant parameter under the present circumstances
The real-time working characteristic of work, and detect whether real-time working characteristic meets preset requirement, including：
The frequency values at the common end of fixed antenna and fixed capacity are obtained, determine that frequency values are low frequency RFID reader
Real-time frequency；
Whether in error range to detect error between real-time frequency and setpoint frequency, if error exceeds error range,
Then determine that real-time frequency does not meet preset requirement；
If the error between real-time frequency and setpoint frequency is in error range, fixed antenna and fixed capacity are obtained
Voltage value at common end calculates the real not time circuit quality factor of low frequency RFID reader according to voltage value；
Real not time circuit quality factor is detected whether in preset factor range, if real not time circuit quality factor is beyond pre-
If quality factor range, it is determined that real not time circuit quality factor does not meet preset requirement.
Its further technical solution is, if real-time frequency does not meet preset requirement, by adjusting each electronic switch
The resonant parameter of the state adjustment low frequency RFID reader of circuit, including：
If the error between real-time frequency and setpoint frequency exceeds error range, and real-time frequency is less than setpoint frequency, then
The corresponding electronic switching circuit of several resonance adjustment capacitance is disconnected up to the real-time frequency of low frequency RFID reader and sets frequency
Error between rate is minimum；
If the error between real-time frequency and setpoint frequency exceeds error range, and real-time frequency is higher than setpoint frequency, then
The corresponding electronic switching circuit of several resonance adjustment capacitance is closed up to the real-time frequency of low frequency RFID reader and sets frequency
Error between rate is minimum.
Its further technical solution is that several resonance adjustment capacitance, which is opened or closed, using dichotomy method classification number corresponds to
Electronic switching circuit.
Its further technical solution is, if real not time circuit quality factor does not meet preset requirement, by adjusting each
The resonant parameter of the state adjustment low frequency RFID reader of electronic switching circuit, including：
If real not time circuit quality factor exceeds preset factor range, and real not time circuit quality factor is more than preset
The maximum value of factor range, then disconnect the first impedance adjustment resistance and/or the corresponding electronic cutting of the second impedance adjustment resistance is powered-down
Road is until the error between the real not time circuit quality factor and preset factor range of low frequency RFID reader is minimum；
If real not time circuit quality factor exceeds preset factor range, and real not time circuit quality factor is less than preset
The minimum value of factor range, then be closed the first impedance adjustment resistance and/or the corresponding electronic cutting of the second impedance adjustment resistance is powered-down
Road is until the error between the real not time circuit quality factor and preset factor range of low frequency RFID reader is minimum.
Its further technical solution is that this method further includes：
The resonant parameter of storage is updated to the resonant parameter after adjustment.
The method have the benefit that：
This application discloses a kind of low frequency RFID reader of adaptive environment and its resonant parameter method of adjustment, the low frequencies
RFID reader adjusts the circuit structure of traditional low frequency RFID reader, using phaselocked loop driving source and electronic cutting
Automatically switch to come matching capacitance and resistance for powered-down road, and equipment powers on every time initially will adjust automatically resonant parameter so that antenna
It is operated under optimal state, reduces influence of the environment to low frequency RFID reader, realize the parameter tune of adaptive environment
It is whole.Newest electronic switching technology is used simultaneously, switch speed reaches Millisecond, does not interfere with the work of reader, avoids
The influence that the regulation of electrical circuit is brought.
Description of the drawings
Fig. 1 is the circuit structure diagram of existing low frequency RFID reader.
Fig. 2 is the circuit structure diagram of low frequency RFID reader disclosed in the present application.
Specific implementation mode
The following further describes the specific embodiments of the present invention with reference to the drawings.
This application discloses a kind of low frequency RF ID of adaptive environment (Radio Frequency Identification,
Radio frequency identification) reader, which is adjusted by the circuit structure to traditional low frequency RFID reader
To realize the resonant parameter adjustment function of adaptive environment.Please refer to Fig.2 the low frequency RFID reader in the application shown
Circuit diagram, which includes：Driving source V1, fixed resistance R1, fixed antenna L1, fixed capacity C1, first
Impedance adjustment resistance RJ1, the second impedance adjustment resistance RJ2, n resonance adjustment capacitance CJ1-CJn, micro-control unit MCU and n
+ 2 electronic switching circuits ER1, ER2, EC1-ECn, n is positive integer, and normal conditions divide into n=8, then low frequency RFID reader
Adjusting range is 28=256 grades.There are driving source V1 phase-locked loop characteristics, each electronic switching circuit to respectively include positive input terminal IN
+, negative input end IN- and two output ends, and electronic switching circuit is connected with open type switch, electricity between the two outputs
Sub switch circuit is mainly made of the common electronic component such as diode, triode, relay, resistance and capacitance, and electronic cutting is powered-down
Road is common circuit module in circuit, and those skilled in the art can be expressly understood that its internal composition and operation principle, this Shen
Please this is repeated no more.In this application, each adjustment component is corresponding with an electronic switching circuit respectively and is connected, here
Adjustment component includes the first impedance adjustment resistance RJ1, the second impedance adjustment resistance RJ2 and n resonance adjustment above-mentioned
Capacitance CJ1-CJn is connected as shown in Fig. 2, the first impedance adjustment resistance RJ1 is corresponding with electronic switching circuit ER1, the second impedance tune
Whole resistance RJ2 is corresponding with electronic switching circuit ER2 to be connected, resonance adjust capacitance CJ1-CJn successively with electronic switching circuit EC1-
ECn, which is corresponded to, to be connected.Each adjustment component is composed in series with the open type switch in corresponding electronic switching circuit respectively
Join circuit, specially：Adjust first end of the one end as series circuit of component, the other end connects corresponding electronic switching circuit
An output end, the second end of another output end of electronic switching circuit as series circuit.
The anode of driving source V1 be sequentially connected in series after fixed resistance R1, fixed antenna L1 and fixed capacity C1 be connected to it is negative
The common end of pole, fixed antenna L1 and fixed capacity C1 is connected to MCU.First impedance adjustment resistance RJ1 and corresponding electronic cutting
The series circuit of powered-down road composition is in parallel with fixed resistance R1, the second impedance adjustment resistance RJ2 and corresponding electronic switching circuit
The series circuit of composition is in parallel with fixed resistance R1, each resonance adjustment capacitance and corresponding electronic switching circuit composition
Series circuit is in parallel with fixed capacity C1 respectively, for each adjustment component, when adjusting in the concatenated electronic switching circuit of component
Open type switch be closed when, the adjustment component access circuit, otherwise do not access.First impedance adjustment resistance RJ1 and n is humorous
The negative input end IN- of corresponding n+1 electronic switching circuit ER1, the EC1-ECn of adjustment capacitance CJ1-CJn of shaking is respectively connected with, and second
The negative input end IN- of the corresponding electronic switching circuit ER2 of impedance adjustment resistance RJ2 is hanging, and the second impedance adjustment resistance RJ2 is used for
Coarse adjustment is carried out to the frequency of entire circuit, the first impedance adjustment resistance RJ1 adjusts capacitance CJ1-CJn compositions with n resonance and finely tunes
Part is finely adjusted the frequency of entire circuit.IN+ points of the positive input terminal of n+2 electronic switching circuit ER1, ER2, EC1-ECn
MCU is not connected, and MCU is powered-down to control electronic cutting by the low and high level for controlling the positive input terminal IN+ of each electronic switching circuit
The opening and closing of open type switch inside road.
Disclosed herein as well is a kind of resonant parameter method of adjustment of low frequency RFID reader adaptive environment, this method is answered
In low frequency RFID reader for such as Fig. 2, this method process is as follows：
Device power is initial, and MCU controls n+2 electronic switching circuit in entire circuit according to the resonant parameter of storage
State, the resonant parameter of storage are reference records when adjusting the last time, then electronic switching circuit is in the adjustment of last time most
Good state.Start phaselocked loop driving source V1 at this time, after waiting Frequency Lockings, MCU measures the public affairs of fixed antenna L1 and fixed capacity C1
Frequency values and voltage value at total end, low frequency RFID reader is detected using obtained frequency values and voltage value is measured in real time
Whether real-time working characteristic meets preset requirement, is mainly the following different situations：
The first situation determines that the frequency values for measuring and obtaining are the real-time frequency of low frequency RFID reader, and detection is real-time
In error range whether, setpoint frequency and error range are preset value, error model to error between frequency and setpoint frequency
Enclose such as can be ± 0.3KHz ranges.If the error between real-time frequency and setpoint frequency is in error range, public affairs are utilized
Formula VPP=VDRV* Q calculates the real not time circuit quality factor q of low frequency RFID reader according to the voltage value that measurement obtains, wherein
VPPThe voltage value as measured, VDRVFor the voltage value of driving source V1.If detecting real not time circuit quality factor q also pre-
If within the scope of quality factor, then it is assumed that this can continue to use resonance when the last adjustment of storage without adjusting resonant parameter
Parameter then directly initiates peak value frequency point and automatically begins to work.
The second situation, if detecting, the error between real-time frequency and setpoint frequency exceeds error range, and frequency in real time
Rate is less than setpoint frequency, then quickly exits the resonance having been cut into adjustment capacitance using dichotomy method classification number, namely use two
Point-score classification number disconnects the corresponding electronic switching circuit of several resonance adjustment capacitance, until between real-time frequency and setpoint frequency
Error minimum until.Then using formula as above according to measure in real time obtained voltage value be calculated real not time circuit quality because
Sub- Q.If real not time circuit quality factor q exceed preset factor range, and real not time circuit quality factor q be more than preset because
The maximum value of subrange, according to formula Q=2 π fL/R it is found that in the case of frequency f and antennainductance L certain, entire electricity
The impedance adjustment resistance of incision inversely, is then disconnected and increases entire electricity by the resistance value R and real not time circuit quality factor q on road
The resistance value R on road, namely disconnect the first impedance adjustment resistance RJ1 and/or the corresponding electronic switches of the second impedance adjustment resistance RJ2
Circuit ER1, ER2 so that circuit quality factor Q reduces until between real not time circuit quality factor q and preset factor range
Error minimum until.If real not time circuit quality factor q exceeds preset factor range, and real not time circuit quality factor q is small
In the minimum value of preset factor range, then reduce the resistance value of entire circuit by continuing to be incorporated to new impedance adjustment resistance
R to increase real not time circuit quality factor q, namely is closed the first impedance adjustment resistance RJ1 and/or the second impedance adjustment resistance
RJ2 corresponding electronic switching circuit ER1, ER2 are up to the error between real not time circuit quality factor q and preset factor range
For minimum.When adjusting to real-time frequency and real not time circuit quality factor all with preset requirement error minimum, start peak value frequency point
Automatically begin to work.
The third situation, if the error between real-time frequency and setpoint frequency exceeds error range, and real-time frequency is higher than
Setpoint frequency is then rapidly joined the resonance that do not cut adjustment capacitance using dichotomy method classification number, namely using dichotomy method point
Series is closed the corresponding electronic switching circuit of several resonance adjustment capacitance, until the error between real-time frequency and setpoint frequency
Until minimum.Similarly, by controlling the first impedance adjustment resistance RJ1 and/or the corresponding electronic cuttings of the second impedance adjustment resistance RJ2
The state of powered-down road ER1, ER2 adjust method such as the second situation of real not time circuit quality factor q, and the application is no longer superfluous to this
It states.When adjusting to real-time frequency and real not time circuit quality factor all with preset requirement error minimum, starts peak value frequency point and open automatically
Beginning work.
In this application, equipment can all use above method adjust automatically resonant parameter after the power is turned on every time, due to entire electricity
Road all uses electronic switching circuit, therefore switch speed is all Millisecond, and the regulation of electrical circuit time almost can be ignored,
Resonant parameter can ensure that low frequency RFID reader is operated under optimal state after adjusting, while MCU is by the resonance of storage
Parameter is updated to the resonant parameter after adjustment, equipment powers on next time when, using updated resonant parameter as initial ginseng
Number.
Above-described is only the preferred embodiment of the application, and present invention is not limited to the above embodiments.It is appreciated that this
The other improvements and change that field technology personnel directly export or associate without departing from the spirit and concept in the present invention
Change, is considered as being included within protection scope of the present invention.
Claims (7)
1. a kind of low frequency RFID reader of adaptive environment, which is characterized in that the low frequency RFID reader includes：Driving
Source, fixed resistance, fixed antenna, fixed capacity, the first impedance adjustment resistance, the second impedance adjustment resistance, n resonance adjustment electricity
Hold, micro-control unit MCU and n+2 electronic switching circuit, the driving source have phase-locked loop characteristics, each electronic cutting
Powered-down road respectively includes positive input terminal, negative input end and two output ends, and the electronic switching circuit is described two defeated
Open type switch is connected between outlet, n is positive integer；The anode of the driving source is sequentially connected in series the fixed resistance, fixation
Cathode is connected to after antenna and fixed capacity, the fixed antenna and the common end of the fixed capacity are connected to the MCU,
Each adjustment component is corresponding with an electronic switching circuit respectively, and each adjustment component is powered-down with corresponding electronic cutting respectively
Open type switch in road is composed in series series circuit, one end of the adjustment component as the series circuit first end,
The other end connects an output end of corresponding electronic switching circuit, another output end of the electronic switching circuit is as institute
The second end of series circuit is stated, the adjustment component includes the first impedance adjustment resistance, the second impedance adjustment resistance
And the n resonance adjusts capacitance；The series electrical that the first impedance adjustment resistance is formed with corresponding electronic switching circuit
Road is in parallel with the fixed resistance, the series circuit that the second impedance adjustment resistance and corresponding electronic switching circuit form with
The fixed resistance is in parallel, the series circuit point of each the resonance adjustment capacitance and corresponding electronic switching circuit composition
It is not in parallel with the fixed capacity, the first impedance adjustment resistance and the corresponding n+1 electricity of n resonance adjustment capacitance
The negative input end of sub switch circuit is respectively connected with, the negative input end of the corresponding electronic switching circuit of the second impedance adjustment resistance
Vacantly, the positive input terminal of the n+2 electronic switching circuit is separately connected the MCU.
2. a kind of resonant parameter method of adjustment of low frequency RFID reader adaptive environment, the method is applied to such as claim
In low frequency RFID reader described in 1, which is characterized in that the method includes：
The state of the n+2 electronic switching circuit is controlled according to the resonant parameter of storage；
Start the driving source, determines the low frequency RFID reader under the present circumstances according to the resonance after Frequency Locking
The real-time working characteristic that parameter works, and detect whether the real-time working characteristic meets preset requirement, the real-time work
Make real-time frequency and real not time circuit quality factor that characteristic includes at least the low frequency RFID reader；
If the real-time working characteristic does not meet the preset requirement, adjusted by adjusting the state of each electronic switching circuit
The resonant parameter of the low frequency RFID reader, until the real-time working characteristic of the low frequency RFID reader is wanted with described preset
Start peak value frequency point when error minimum between asking and automatically begins to work.
3. according to the method described in claim 2, it is characterized in that, the determination low frequency RFID reader is in current environment
Under the real-time working characteristic that works according to the resonant parameter, and detect whether the real-time working characteristic meets default want
It asks, including：
The fixed antenna and the frequency values at the common end of the fixed capacity are obtained, determines that the frequency values are the low frequency
The real-time frequency of RFID reader；
Whether in error range error between the real-time frequency and setpoint frequency is detected, if the error exceeds the mistake
Poor range, it is determined that the real-time frequency does not meet the preset requirement；
If the error between the real-time frequency and setpoint frequency obtains the fixed antenna and institute in the error range
The voltage value at the common end of fixed capacity is stated, the real not time circuit product of the low frequency RFID reader are calculated according to the voltage value
Prime factor；
The real not time circuit quality factor is detected whether in preset factor range, if the real not time circuit quality factor is super
Go out the preset factor range, it is determined that the real not time circuit quality factor does not meet the preset requirement.
4. according to the method described in claim 3, it is characterized in that, if real-time frequency does not meet the preset requirement, pass through
The state for adjusting each electronic switching circuit adjusts the resonant parameter of the low frequency RFID reader, including：
If the error between the real-time frequency and setpoint frequency exceeds the error range, and the real-time frequency is less than described
Setpoint frequency, then disconnect several resonance corresponding electronic switching circuit of adjustment capacitance until the low frequency RFID reader reality
When frequency and the setpoint frequency between error it is minimum；
If the error between the real-time frequency and setpoint frequency exceeds the error range, and the real-time frequency is higher than described
Setpoint frequency, then be closed several resonance corresponding electronic switching circuit of adjustment capacitance until the low frequency RFID reader reality
When frequency and the setpoint frequency between error it is minimum.
5. according to the method described in claim 4, it is characterized in that,
The corresponding electronic switching circuit of several resonance adjustment capacitance is opened or closed using dichotomy method classification number.
6. according to the method described in claim 3, it is characterized in that, if real not time circuit quality factor does not meet described default want
It asks, then the state by adjusting each electronic switching circuit adjusts the resonant parameter of the low frequency RFID reader, including：
If the real not time circuit quality factor exceeds the preset factor range, and the real not time circuit quality factor is more than
The maximum value of the preset factor range then disconnects the first impedance adjustment resistance and/or second impedance adjustment
Real not time circuit quality factor and the preset of the corresponding electronic switching circuit of resistance up to the low frequency RFID reader
Error between factor range is minimum；
If the real not time circuit quality factor exceeds the preset factor range, and the real not time circuit quality factor is less than
The minimum value of the preset factor range is then closed the first impedance adjustment resistance and/or second impedance adjustment
Real not time circuit quality factor and the preset of the corresponding electronic switching circuit of resistance up to the low frequency RFID reader
Error between factor range is minimum.
7. according to any method of claim 2 to 6, which is characterized in that the method further includes：
The resonant parameter of storage is updated to the resonant parameter after the adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204422.9A CN108416242B (en) | 2018-03-13 | 2018-03-13 | Low-frequency RFID reader adaptive to environment and resonance parameter adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810204422.9A CN108416242B (en) | 2018-03-13 | 2018-03-13 | Low-frequency RFID reader adaptive to environment and resonance parameter adjusting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108416242A true CN108416242A (en) | 2018-08-17 |
| CN108416242B CN108416242B (en) | 2023-11-17 |
Family
ID=63131112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810204422.9A Active CN108416242B (en) | 2018-03-13 | 2018-03-13 | Low-frequency RFID reader adaptive to environment and resonance parameter adjusting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108416242B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111178105A (en) * | 2019-12-31 | 2020-05-19 | 深圳移航通信技术有限公司 | RFID (radio frequency identification) tag information reading device and method |
| CN112669499A (en) * | 2020-12-17 | 2021-04-16 | 歌尔光学科技有限公司 | Radio frequency parameter application method, radio frequency parameter pushing method, wearable device, terminal and system |
| WO2023223169A1 (en) * | 2022-05-17 | 2023-11-23 | Covidien Lp | Q-factor control for use with retained surgical item detection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710300A (en) * | 2012-05-11 | 2012-10-03 | 北京握奇数据系统有限公司 | Radio frequency identification (RFID) loop antenna matching method, antenna, electronic tag and reader |
| CN103996903A (en) * | 2014-05-09 | 2014-08-20 | 张远奇 | Novel low frequency animal RFID tag reader antenna |
| KR20150001325A (en) * | 2013-06-27 | 2015-01-06 | 주식회사 에이텍 | Loop antenna matching circuit using radio frequency identification |
| CN205318397U (en) * | 2015-12-29 | 2016-06-15 | 无锡市富华科技有限责任公司 | A electronic tags reads ware for handing terminal |
| CN207895465U (en) * | 2018-03-13 | 2018-09-21 | 无锡市富华科技有限责任公司 | A kind of low frequency RFID reader of adaptive environment |
-
2018
- 2018-03-13 CN CN201810204422.9A patent/CN108416242B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710300A (en) * | 2012-05-11 | 2012-10-03 | 北京握奇数据系统有限公司 | Radio frequency identification (RFID) loop antenna matching method, antenna, electronic tag and reader |
| KR20150001325A (en) * | 2013-06-27 | 2015-01-06 | 주식회사 에이텍 | Loop antenna matching circuit using radio frequency identification |
| CN103996903A (en) * | 2014-05-09 | 2014-08-20 | 张远奇 | Novel low frequency animal RFID tag reader antenna |
| CN205318397U (en) * | 2015-12-29 | 2016-06-15 | 无锡市富华科技有限责任公司 | A electronic tags reads ware for handing terminal |
| CN207895465U (en) * | 2018-03-13 | 2018-09-21 | 无锡市富华科技有限责任公司 | A kind of low frequency RFID reader of adaptive environment |
Non-Patent Citations (1)
| Title |
|---|
| 高小明;: "一种无源RFID无线射频识别系统的研究与设计", 微计算机信息, no. 20 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111178105A (en) * | 2019-12-31 | 2020-05-19 | 深圳移航通信技术有限公司 | RFID (radio frequency identification) tag information reading device and method |
| CN111178105B (en) * | 2019-12-31 | 2021-08-24 | 上海移为通信技术股份有限公司 | RFID (radio frequency identification) tag information reading device and method |
| US11636302B2 (en) | 2019-12-31 | 2023-04-25 | Queclink Wireless Solutions Co., Ltd. | RFID tag information reading apparatus and method |
| CN112669499A (en) * | 2020-12-17 | 2021-04-16 | 歌尔光学科技有限公司 | Radio frequency parameter application method, radio frequency parameter pushing method, wearable device, terminal and system |
| CN112669499B (en) * | 2020-12-17 | 2023-01-24 | 歌尔科技有限公司 | Radio frequency parameter application method, radio frequency parameter pushing method, wearable device, terminal and system |
| WO2023223169A1 (en) * | 2022-05-17 | 2023-11-23 | Covidien Lp | Q-factor control for use with retained surgical item detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108416242B (en) | 2023-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106549505B (en) | Resonance type wireless power supply transmitting line and its control method and impedance control circuit | |
| CN109075612B (en) | Wireless power transmission control device and method | |
| CN108416242A (en) | A kind of low frequency RFID reader and its resonant parameter method of adjustment of adaptive environment | |
| KR20170141101A (en) | Wireless power transmitting unit capable auto-tunning in response to impedance variance of load | |
| US10923958B2 (en) | Power transmitter, resonance-type contactless power supply and control method thereof | |
| US10615702B2 (en) | Power converter and control method thereof | |
| US10381877B2 (en) | Electrical energy receiving end capable of overvoltage protection and wireless electrical energy transmission device | |
| CN207895465U (en) | A kind of low frequency RFID reader of adaptive environment | |
| CN105205513B (en) | A kind of radio-frequency recognition system and method based on Adaptive matching technology | |
| CN106532978B (en) | Wireless power transmission system and wireless power transmission control method | |
| CN106253490B (en) | The control method of power-supply device and power-supply device | |
| JP2018196291A (en) | Non-contact power supply device | |
| US11569688B2 (en) | Wireless charger and control method | |
| Wang et al. | A novel coupling factor independent highly efficient resonant based wireless power transfer | |
| CN109314406B (en) | Wireless power transmission system | |
| Pucci et al. | A 13.56 mhz bidirectional ipt system with wirelessly synchronised transceivers for ultra-low coupling operation | |
| CN110603712A (en) | Non-contact power supply device | |
| CN210775644U (en) | Voltage fluctuation detection circuit | |
| KR101444746B1 (en) | Apparatus for transmitting magnetic resonance power | |
| EP3116099B1 (en) | Power supply device and power supply method | |
| WO2023040507A1 (en) | Wireless charging receiver circuit, system and chip | |
| CN211406271U (en) | Mode switching power amplifier system adaptive to multiple loads | |
| CN116683661A (en) | Magnetic coupling resonance wireless power transmission control scheme with maximized receiving efficiency | |
| CN214543820U (en) | Reconfigurable current type wireless power transmission system with impedance matching | |
| Makarov et al. | Experimental Study of Class E Family Power Amplifiers with Shunt Filter for Reduced Duty Ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Low Frequency RFID Reader with Adaptive Environment and Its Resonance Parameter Adjustment Method Granted publication date: 20231117 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: WUXI FOFIA TECHNOLOGY Co.,Ltd. Registration number: Y2024980009489 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |