CN109033906A - A kind of device and method for testing RFID sensitivity - Google Patents
A kind of device and method for testing RFID sensitivity Download PDFInfo
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- CN109033906A CN109033906A CN201810840454.8A CN201810840454A CN109033906A CN 109033906 A CN109033906 A CN 109033906A CN 201810840454 A CN201810840454 A CN 201810840454A CN 109033906 A CN109033906 A CN 109033906A
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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
- G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
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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
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- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of device and methods for testing RFID sensitivity, including computer, ultrahigh frequency readers to be tested and test fixture；The computer, ultrahigh frequency readers to be tested and test fixture are communicated to connect by Ethernet interface or RS232 interface；Computer is for starting sensitivity test, count the sensitivity under specific bit error rate, it is connected between reader and working plate by radio frequency line, reader checks order and single carrier according to the transmission of hyperfrequency agreement, and the UHF chips bound on working plate can reply random number or the information such as EPC encoded information or TID according to decoded order.The working plate of this method is made of circulator, coupler, ultrahigh-frequency tag chip, numerical-control attenuator, power cell calibration unit and microprocessor etc., can substitute expensive test equipment, and test result is truer, accurate.
Description
Technical field
The present invention relates to the research and development of UHF reader or the applied technical field of production line measurement sensitivity, specially a kind of surveys
Try the device and method of RFID sensitivity.
Background technique
Ultra-high-frequency passive radio-frequency recognition system is generally by reader, antenna, passive label composition.Research and development or production line production
The receiving sensitivity of test reader is required in the process, thus clear equipment performance, refering to fig. 1.
Receiving sensitivity refers to the receiver minimum that receiver input terminal need to input in the case where meeting certain error rate condition
Signal level.In practical research and development or production process, signal source simulation electronic label is used, usually by adjusting power and computer statistics
The bit error rate, the reversed receiving sensitivity of test equipment.In addition it is also possible to carrier wave is modulated by RF switch by FPGA or MCU,
Simulation electronic label.Regardless of test method, the real scene of true tag backscattering can not be all simulated, and if
Influence before having ignored to leakage to reversed sensitivity also results in test data inaccuracy.Therefore, it is necessary in response to this,
A kind of closer true application scenarios are developed, more accurate test method is tested.
Chinese invention patent 200910193540.5 (applying date: on October 30th, 2009) discloses a kind of test RFID and reads
Read the method and its equipment of device receiving sensitivity.Test method includes reader transmitting local oscillator carrier signal, while listening to label
The local oscillator carrier signal of answer signal, reader transmitting is input to first annular device after being reflected by an obstacle, and first annular device is defeated
Send local oscillator carrier signal to tag responses signal simulator, tag responses signal simulator is modulated local oscillator carrier signal,
Decaying and function point processing, generate power equal first via tag analog signal and the second road sign label analog signal, the first road sign
Analog signal input power meter is signed, the second road sign label analog signal inputs the first annular device, first annular device input second
Road sign label analog signal is to the receiving end of reader.Its test equipment includes reader, first annular device, tag responses signal mode
Quasi- device and power meter.The technical program can accurately, quickly and easily test the receiving sensitivity of RFID reader.The invention
Measurement sensitivity method is to simulate label returned data by modulation carrier wave, and there are errors with physical tags return signal, cannot
True and accurate reflects actual conditions.
Chinese invention patent ZL 201010148006.5 (applying date: on 04 09th, 2010) discloses a kind of radio frequency knowledge
Other reader remotely testing receiver sensitivity method and apparatus, technical problems to be solved are to monitor the reception of RFID reader
Sensitivity.Method of the invention, comprising the following steps: signal source exports a frequency values, and data stream generation unit generates data flow
And it is encoded, after modulation amplification, oriented coupler to receiving unit, amplification demodulation reverts to connecing for coded format
Numeric data code is received, error rate calculation judging unit compares it with initial data code, calculates the bit error rate.The device of the invention is equipped with
Center processor, the transmitting unit and receiving unit being connect with center processor.Compared with prior art, the present invention utilizing read-write
Device generates test signal, and the sensitivity technique for carrying out the machine timing or being initiated by remote control method, from surveying, the time is short, can make remote
Process control side determines the working condition of reader at any time, realizes radio-frequency identification reader/writer sensitivity remote real-time monitoring.The hair
It send through winding on-line checking sensitivity situation, it can not true measurement sensitivity although convenient.
To sum up, sensitive using signal source test reader for the method for RFID sensitivity test in currently available technology
Degree, it is not only expensive, but also be not suitable for production line and build multiple test station demands.In addition, sending specific letter with signal source
Number simulation stamp methods measurement sensitivity, the data tested out do not account for before to influence of the leakage to sensitivity, also can not mould
Quasi- reality, which reversely solves adjusting data according to agreement, climbing problem, and then can not real embodiment reader sensitivity.
Summary of the invention
The purpose of the present invention is to provide a kind of device and method for testing RFID sensitivity, the more inexpensive tests of use
Scheme more really, accurately tests reader receiving sensitivity, can substitute expensive test equipment, is more suitable for research and development or raw
Producing line concurrent testing occasion, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of device for testing RFID sensitivity, including electricity
Brain, ultrahigh frequency readers to be tested and test fixture；The computer, ultrahigh frequency readers to be tested and test fixture pass through ether
Network interface or RS232 interface communication connection；
The computer counts the sensitivity under specific bit error rate for starting sensitivity test；
It is connected between the ultrahigh frequency readers to be tested and test fixture by radio frequency line, ultrahigh frequency readers to be tested
Order and carrier wave are checked according to the transmission of hyperfrequency agreement, the UHF chips bound on test fixture are replied according to decoded order
Random number or EPC encoded information or TID information.
The test fixture can dynamically set the threshold of sensitivity of working plate transmitting, according to research and development or production line requirement
Flexible configuration, test fixture by switch matrix, first order circulator, coupler, second level circulator, ultrahigh-frequency tag chip,
Numerical-control attenuator and power detecting unit composition.
Preferably, the ultrahigh frequency readers to be tested send carrier wave and forward signal, before waking up label and sending
To order, while ultrahigh frequency readers to be tested are opened reversed receive and are switched, monitor the letter that label returns according to protocol requirement
Number, forward direction checks order according to agreement transmission.
Preferably, it is connected between the ultrahigh frequency readers to be tested and test fixture by radio frequency line, if to be tested super
High frequency reader has multiple antenna ports, and test fixture supports multiple antenna port sensitivity tests by switch matrix.
Preferably, the test fixture receives before reader to order, returns after resolve command and checks data.
Preferably, the test fixture receives before reader to order, forward direction order successively pass through circulator, coupler,
PI decays link, and forward power reaches UHF chips by decaying, UHF chips successfully parse it is preceding to after order, according to association
View returns to random number or label information area data.
Preferably, the carrier wave that the label emits ultrahigh frequency readers to be tested is modulated, modulated signal process
Match, controllable attenuation device pours into the antenna port of ultrahigh frequency readers to be tested through circulator.
Preferably, the energy size of the ultrahigh frequency readers antenna port to be tested is configurable, and computer is connect by Ethernet
Mouth or RS interface configure test fixture return signal energy size, realize that dynamic adjusts the sensitive of ultrahigh frequency readers to be tested
Degree.
Preferably, the test fixture is returned to the energy size adjustable of ultrahigh frequency readers to be tested, and calibrating mode is logical
Crossing software configuration can choose FM coding or MILLER coding.
The present invention provides another technical solution are as follows: a method of test RFID sensitivity, comprising the following steps:
S1: ultrahigh frequency readers to be tested first send single carrier according to hyperfrequency agreement, sending window, survey for activating
The ultra-high-frequency passive chip that trial work is loaded onto；
S2: ultrahigh frequency readers to be tested send before to checking order, tag resolution is to preceding to after order, backscattering tune
Carrier wave processed exports reverse data；
S3: in the information for receiving window reception test fixture and returning of ultrahigh frequency readers to be tested, if to be tested super
The EPC code or TID that high frequency reader energy unsuccessful demodulation tag decoder returns, then it is assumed that this sensitivity test passes through, and otherwise recognizes
For this test crash.
Compared with prior art, the beneficial effects of the present invention are:
The device and method of this test RFID sensitivity can be tested effectively compared with prior art with signal source in solution
It is expensive, the problem of unsuitable production line builds multiple test station demands；In addition, tradition sends signal specific with signal source
Stamp methods measurement sensitivity is simulated, the data tested out do not account for the preceding influence to leakage to sensitivity, can not simulate yet
The practical adjusting data that reversely solves according to agreement has a climbing problem, so can not real embodiment reader sensitivity, the present invention is using more
The testing scheme of low cost more really, accurately tests reader receiving sensitivity, can substitute expensive test equipment, more
It is suitble to research and development or production line concurrent testing occasion.
Detailed description of the invention
Fig. 1 is traditional test sensitivity system block diagram；
Fig. 2 is measurement sensitivity system block diagram of the present invention；
Fig. 3 is test fixture functional block diagram of the present invention.
In figure: 1 computer, 2 ultrahigh frequency readers, 3 test fixtures, 4 Ethernet interfaces or RS232 interfaces to be tested, 5 radio frequencies
Line.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
Please refer to Fig. 2-3, a kind of device for testing RFID sensitivity, including computer 1,2 and of ultrahigh frequency readers to be tested
Test fixture 3；Computer 1, ultrahigh frequency readers to be tested 2 and test fixture 3 are communicated by Ethernet interface or RS232 interface 4
Connection；
Wherein, computer 1 is for starting sensitivity test, and counts the sensitivity under specific bit error rate；Superelevation to be tested
It is connected between frequency reader 2 and test fixture 3 by radio frequency line 5, ultrahigh frequency readers 2 to be tested are sent according to hyperfrequency agreement
Order and carrier wave are checked, the UHF chips bound on test fixture 3 reply random number according to decoded order or EPC is encoded
Information or TID information；Test fixture 3 can dynamically set the threshold of sensitivity of working plate transmitting, according to research and development or production line
It is required that flexible configuration, test fixture 3 is by switch matrix, first order circulator, coupler, second level circulator, ultrahigh-frequency tag
Chip, numerical-control attenuator and power detecting unit composition.
When work, ultrahigh frequency readers 2 to be tested send carrier wave and forward signal, for waking up label and sending preceding to life
It enables, while ultrahigh frequency readers to be tested 2 are opened reversed receive and switched, monitor the signal that label returns according to protocol requirement, spirit
When sensitivity is tested, forward direction checks order according to agreement transmission, the random number and label information that tag decoder returns under normal circumstances
Area's data, while receiving above- mentioned information, then it is assumed that this time otherwise successfully decoded then records this and checks unsuccessfully；Superelevation to be tested
It is connected between frequency reader 2 and test fixture 3 by radio frequency line 5, if ultrahigh frequency readers to be tested 2 have multiple antenna ports, is surveyed
Trial work fills 3 and supports multiple antenna port sensitivity tests by switch matrix；To order, parsing before the reception reader of test fixture 3
It is returned after order and checks data.
Wherein, to order before the reception of test fixture 3 reader, its main feature is that circulator, coupling are successively passed through in forward direction order
Device, PI decay link, and forward power reaches UHF chips by decaying, and UHF chips successfully parses preceding to after order, meeting
Random number or label information area data are returned to according to agreement, scattering energy size with Forward receiving ability has relationship；Label pair
The carrier wave that ultrahigh frequency readers 2 to be tested emit is modulated, and modulated signal is filled through overmatching, controllable attenuation device through circulator
Enter the antenna port of ultrahigh frequency readers 2 to be tested, the energy size of 2 antenna port of ultrahigh frequency readers to be tested is configurable, computer 1
3 return signal energy size of test fixture is configured by Ethernet interface or RS232 interface 4, it is to be tested super to realize that dynamic adjusts
The sensitivity of high frequency reader 2；Test fixture 3 is returned to the energy size adjustable of ultrahigh frequency readers 2 to be tested, due to tooling
Radio-frequency devices discrete type and UHF chips albedo size are also different on plate, need to calibrate return by reference instrument
Energy, thus guarantee reflect signal it is precisely consistent, calibrating mode by software configuration can choose FM0 encode or MILLER
Coding, so that the signal for guaranteeing the working plate transmitting on different test fixtures 3 is that standard is consistent.
Embodiment 2:
1 description based on the above embodiment, the present invention provide another embodiment are as follows: a kind of side for testing RFID sensitivity
Method, comprising the following steps:
Step 1: ultrahigh frequency readers 2 to be tested first send single carrier according to hyperfrequency agreement, sending window, it is used for
Activate the ultra-high-frequency passive chip on test fixture 3；
Step 2: ultrahigh frequency readers 2 to be tested send before to checking order, tag resolution is to preceding to after order, reversely
Scattering modulation carrier wave, exports reverse data；
Step 3: in the information for receiving window reception test fixture 3 and returning of ultrahigh frequency readers 2 to be tested, if to
Test EPC code or TID that 2 energy unsuccessful demodulation tag decoder of ultrahigh frequency readers returns, then it is assumed that this sensitivity test passes through,
Otherwise it is assumed that this test crash.
Wherein, for ultrahigh frequency readers 2 to be tested according to hyperfrequency agreement, forward direction, which is first sent, obtains random number order, if
Ultrahigh frequency readers 2 to be tested can normally receive the random number of the return of test fixture 3 and verification passes through, then then send and obtain
The forward direction order of EPC code or TID, the data that demodulating and decoding test fixture 3 returns, finally provides success or failure mark；If
Verification failure, then record epicycle test crash；Moreover, 2 forward power size of ultrahigh frequency readers to be tested can be according to reality
Application scenarios power setting can also require flexible setting according to research and development, thus to leakage signal to be tested super before considering
The influence of 2 sensitivity of high frequency reader, utmostly close to practical application scene.
In summary: it is provided by the invention it is a kind of test RFID sensitivity device and method compared with prior art can
It solves the problem of to build multiple test station demands with the expensive unsuitable production line of signal source testing cost with effective；In addition, passing
System with signal source send signal specific simulate stamp methods measurement sensitivity, the data tested out do not account for before to leakage to spirit
The influence of sensitivity, can not also simulate the practical adjusting data that reversely solves according to agreement has climbing problem, and then can not real embodiment reading
Device sensitivity, the present invention use more inexpensive testing scheme, more really, accurately test reader receiving sensitivity, energy
Expensive test equipment is substituted, research and development or production line concurrent testing occasion are more suitable for.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (9)
1. it is a kind of test RFID sensitivity device, which is characterized in that including computer (1), ultrahigh frequency readers to be tested (2) and
Test fixture (3)；The computer (1), ultrahigh frequency readers to be tested (2) and test fixture (3) by Ethernet interface or
RS232 interface (4) communication connection；
The computer (1) counts the sensitivity under specific bit error rate for starting sensitivity test；
It is connected between the ultrahigh frequency readers to be tested (2) and test fixture (3) by radio frequency line (5), hyperfrequency to be tested
Reader (2) checks order and carrier wave according to the transmission of hyperfrequency agreement, and the UHF chips bound on test fixture (3) are according to solution
Random number or EPC encoded information or TID information are replied in the order of code.
The test fixture (3) can dynamically set the threshold of sensitivity of working plate transmitting, according to research and development or production line requirement
Flexible configuration, test fixture (3) is by switch matrix, first order circulator, coupler, second level circulator, ultrahigh-frequency tag core
Piece, numerical-control attenuator and power detecting unit composition.
2. a kind of device for testing RFID sensitivity as described in claim 1, it is characterised in that: the hyperfrequency to be tested is read
Read device (2) and send carrier wave and forward signal, for before waking up label and sending to order, while ultrahigh frequency readers to be tested
(2) it according to protocol requirement, opens reversed receive and switchs, monitor the signal that label returns, forward direction checks order according to agreement transmission.
3. a kind of device for testing RFID sensitivity as described in claim 1, it is characterised in that: the hyperfrequency to be tested is read
It reads to connect between device (2) and test fixture (3) by radio frequency line (5), if ultrahigh frequency readers to be tested (2) have multiple antenna feeders
Mouthful, test fixture (3) supports multiple antenna port sensitivity tests by switch matrix.
4. a kind of device for testing RFID sensitivity as described in claim 1, it is characterised in that: the test fixture (3) connects
It receives before reader to order, is returned after resolve command and check data.
5. a kind of device for testing RFID sensitivity as claimed in claim 4, it is characterised in that: the test fixture (3) connects
To order before receipts reader, circulator, coupler, PI decaying link are successively passed through in forward direction order, and forward power is by decaying to
Up to UHF chips, UHF chips successfully parse before to after order, random number or label information area data are returned to according to agreement.
6. a kind of device for testing RFID sensitivity as claimed in claim 5, it is characterised in that: the label is to be tested super
The carrier wave of high frequency reader (2) transmitting is modulated, and modulated signal pours into be measured through overmatching, controllable attenuation device through circulator
Try the antenna port of ultrahigh frequency readers (2).
7. a kind of device for testing RFID sensitivity as claimed in claim 6, it is characterised in that: the hyperfrequency to be tested is read
The energy size for reading device (2) antenna port is configurable, and computer (1) configures test fixture by Ethernet interface or RS232 interface (4)
(3) return signal energy size realizes that dynamic adjusts the sensitivity of ultrahigh frequency readers to be tested (2).
8. a kind of device for testing RFID sensitivity as claimed in claim 7, it is characterised in that: the test fixture (3) is returned
To the energy size adjustable of ultrahigh frequency readers to be tested (2), calibrating mode by software configuration can choose FM0 coding or
MILLER coding.
9. a kind of method of test RFID sensitivity as described in claim 1, which comprises the following steps:
S1: ultrahigh frequency readers (2) to be tested first send single carrier according to hyperfrequency agreement, sending window, survey for activating
Trial work fills the ultra-high-frequency passive chip on (3)；
S2: ultrahigh frequency readers (2) to be tested send before to checking order, tag resolution is to preceding to after order, backscattering tune
Carrier wave processed exports reverse data；
S3: in the information that the reception window reception test fixture (3) of ultrahigh frequency readers to be tested (2) returns, if to be tested
The EPC code or TID that ultrahigh frequency readers (2) energy unsuccessful demodulation tag decoder returns, then it is assumed that this sensitivity test passes through, no
Then think this test crash.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810840454.8A CN109033906A (en) | 2018-07-27 | 2018-07-27 | A kind of device and method for testing RFID sensitivity |
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| CN201810840454.8A CN109033906A (en) | 2018-07-27 | 2018-07-27 | A kind of device and method for testing RFID sensitivity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110751000A (en) * | 2019-09-24 | 2020-02-04 | 国网湖南省电力有限公司 | Verification test method and device for ultrahigh frequency RFID (radio frequency identification) tag |
| CN111382587A (en) * | 2018-12-29 | 2020-07-07 | 武汉万集信息技术有限公司 | Radio frequency reader-writer, test signal selection method and storage medium |
| CN112541559A (en) * | 2020-12-28 | 2021-03-23 | 高新兴智联科技有限公司 | Reader equipment and method based on UWB technology |
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Application publication date: 20181218 |