CN206946493U - The test equipment and system of a kind of radio frequency reader - Google Patents
The test equipment and system of a kind of radio frequency reader Download PDFInfo
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- CN206946493U CN206946493U CN201720759886.7U CN201720759886U CN206946493U CN 206946493 U CN206946493 U CN 206946493U CN 201720759886 U CN201720759886 U CN 201720759886U CN 206946493 U CN206946493 U CN 206946493U
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Abstract
Embodiment of the present utility model provides the test equipment and system of a kind of radio frequency reader.Wherein, the equipment includes：Directional coupler, signal processing apparatus, processor, the first attenuator and the second attenuator；The input and output end of the signal processing apparatus are connected with the directional coupler and the processor respectively, first attenuator is connected with the directional coupler and the processor, and second attenuator is connected with first attenuator and the processor.By embodiment of the present utility model, the sensitivity of radio frequency reader can be accurately tested.
Description
Technical field
Field of radio frequency identification is the utility model is related to, in particular it relates to a kind of test equipment of radio frequency reader and be
System.
Background technology
REID (RFID, Radio Frequency Identification Devices) is a kind of non-contact
Formula identification technology, it is by radiofrequency signal automatic identification destination object and carries out data interaction.RFID automatic recognition systems include
Reader, antenna and label.Wherein, reader with electromagnetic wave send querying command, working frequency be 840MHz~
Between 960MHz, electromagnetic wave receives reader hair by antenna to label, label is searched for while space radiation in region of search
The electromagnetic wave signal sent, the signal is parsed and produces corresponding answer signal, and answer signal is modulated to what is received
Reader is sent on electromagnetic wave signal.The receiving sensitivity of reader determines the recognition capability to tag responses signal.It is existing
Some equipment can not isolate the tag responses signal that reader receives from homogenous frequency signal, can not then test reader
Receiving sensitivity.Radio-frequency identification reader of the prior art also to monitor reception spirit in real time without the self-test function of correlation
Sensitivity.
In the prior art, the method for testing on reader receiving sensitivity is typically to be simulated using an outside source
Label, communicated according to the communication modes indicated in standard with reader, under a certain bit error rate, the transmitting of simulation label is most
Small-power is the sensitivity of reader.Under such a test environment, because reader and simulation label use different frequency source, very
Difficulty reaches same yupin effect, and in the case of different frequencies, the reader bit error rate declines, and the receiving sensitivity then now measured is inaccurate
True.
Utility model content
Embodiment of the present utility model provides a kind of test equipment and system of radio frequency reader, can accurately test and penetrate
Packet Error Ratio of the sensitivity and radio frequency reader of frequency reader under test equipment current transmission power.
To reach above-mentioned purpose, embodiment of the present utility model provides a kind of test equipment of radio frequency reader.It is described
Equipment includes：Directional coupler, signal processing apparatus, processor, the first attenuator and the second attenuator；The signal processing device
The input and output end put are connected with the directional coupler and the processor respectively, first attenuator with it is described fixed
Connected to coupler with the processor, second attenuator is connected with first attenuator and the processor, described
Radiofrequency signal from radio frequency reader to be tested is divided into first of output to the signal processing apparatus by directional coupler
Road signal and second road signal and export the 3rd road signal to first attenuator；The signal processing apparatus is according to institute
State first via signal and the second road signal and produce the data signal for being suitable to processor identification, and by the data signal
Export to the processor；The data signal that the processor exports according to the signal processing apparatus produces first decay
Second control signal of the first control signal of device and second attenuator；First attenuator is according to the described first control
Signal and the 3rd road signal produce the first simulation label signal containing random number and check code；The second attenuator root
The second simulation label letter being adjusted according to second control signal and the first simulation label signal generation transmission power
Number, and the described second simulation label signal is sent to the radio frequency reader to be tested；The processor is always according to described
Data signal and the first simulation label signal produce the comparison signal of the random number and check code, and according to the comparison
The transmission power of signal and the second simulation label signal produces the first test result of the radio frequency reader to be tested
Signal.
Alternatively, the signal processing apparatus includes：The demodulating equipment that is connected with the directional coupler and with it is described
The first sampling apparatus that demodulating equipment connects with the processor, the demodulating equipment are believed the second road signal as local oscillator
Number, and the first via signal is demodulated according to the local oscillation signal, the analog signal after being demodulated；Described first adopts
Sampling device is sampled and nursed one's health to the analog signal after the demodulation, obtains the data signal for being suitable to processor identification.
Alternatively, the equipment also includes：Power detection device, it is connected with second attenuator and the processor；
The power detection device produces the first detection signal of the transmission power of the second simulation label signal, and by described first
Detection signal is sent to the processor.
Alternatively, the power detection device includes：The power splitter being connected with second attenuator and the power splitter
The power detection device of connection and the second sampling apparatus being connected with the power detection device and the processor, the work(
Divide device that the described second simulation label signal is divided into the equal two paths of signals of power；The power detection device produces the two-way
Second detection signal of the transmission power of the signal all the way in signal；Second sampling apparatus by second detection signal by
Analog signal is converted to data signal, and the second detection signal after conversion is transmitted to the processor.
Alternatively, the processor always according to the data signal produce count signal, and according to it is described comparison signal and
The count signal produces the second test result signal of the radio frequency reader to be tested.
Correspondingly, the embodiment of the present invention also provides a kind of test system of radio frequency reader.The system includes：According to upper
State the test equipment described in any one；Host computer, it is connected with the test equipment, the host computer is according to described to be tested
The testing standard of test equipment described in the standard update that radio frequency reader is supported.
Alternatively, the system also includes：Circulator, with the test equipment and the radio frequency reader to be tested point
Do not connect；The circulator receives the radiofrequency signal of the radio frequency reader transmission to be tested and penetrated to described to be tested
Frequency reader sends the second simulation label signal.
Alternatively, the host computer is according between the default radio frequency reader to be tested and the test equipment
The Insertion Loss value of connection cables, the Insertion Loss value of the circulator and the first test result signal produce the 3rd by calibration
Test result signal.
As shown from the above technical solution, the radiofrequency signal from radio frequency reader to be tested is divided into defeated by directional coupler
Go out to signal processing apparatus first via signal and second road signal and export the 3rd road signal to the first attenuator；Signal
Processing unit produces the data signal for being suitable to processor and identifying according to first via signal and second road signal, and data signal is defeated
Go out to processor；The data signal that processor is exported according to signal processing apparatus produce the first attenuator the first control signal and
Second control signal of the second attenuator；First attenuator produces according to the first control signal and the 3rd road signal and contains random number
Label signal is simulated with the first of check code；Second attenuator produces hair according to the second control signal and the first simulation label signal
The second simulation label signal that power is adjusted is penetrated, and the second simulation label signal is sent to radio frequency reading to be tested
Device；Processor produces the comparison signal of random number and check code always according to data signal and the first simulation label signal, and according to
Compare signal and the second transmission power for simulating label signal produce the first test result signal of radio frequency reader to be tested,
The sensitivity of radio frequency reader can accurately be tested.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art.It should be evident that drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these figures.
Fig. 1 is the flow chart of the sensitivity test method for the radio frequency reader that the embodiment of the utility model one provides；
Fig. 2 is the schematic diagram of the state transition for single label inventory dot pattern that the embodiment of the utility model one provides；
Fig. 3 is the flow chart of the Packet Error Ratio method of testing for the radio frequency reader that the embodiment of the utility model one provides；
Fig. 4 is the structural representation of the test equipment for the radio frequency reader that the embodiment of the utility model one provides；
Fig. 5 is the structural representation of the test system for the radio frequency reader that the embodiment of the utility model one provides；
Fig. 6 is the flow chart of the sensitivity test method for the radio frequency reader that the embodiment of the utility model one provides；
Fig. 7 is the flow chart of the Packet Error Ratio method of testing for the radio frequency reader that the embodiment of the utility model one provides.
Embodiment
Embodiment of the present utility model is described in detail with reference to the accompanying drawings.In the following description, elaborate many specific
Details is to make person of ordinary skill in the field that the utility model be appreciated more fully.But for art
Interior technical staff is not it is evident that realization of the present utility model can have some in these details.In addition, it should manage
Solution, the utility model are not limited to introduced specific embodiment.Conversely, it may be considered that with following feature and key element
It is combined to implement the utility model, regardless of whether they are related to different embodiments.Therefore, aspect below, feature,
Embodiment and advantage are used and are not construed as key element or the restriction of claim for illustrative purposes only, unless bright in the claims
Really propose.
Fig. 1 is the flow chart of the sensitivity test method for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 1
Shown, the sensitivity test method for the radio frequency reader that the embodiment of the utility model one provides includes：
In step sl, the radiofrequency signal that radio frequency reader to be tested is sent is received, and the radiofrequency signal is carried out
Parsing, obtain the parsing content of the radiofrequency signal.
In the present embodiment, the radio frequency reader to be tested can be that the radio frequency in radio frequency identification system is read
Device., it is necessary to which radio frequency reader to be tested is configured into single mark before the method for testing of sensitivity of radio frequency reader is carried out
Inventory dot pattern is signed, and also needs to the sensitivity that the test equipment of radio frequency reader is configured to radio frequency reader by host computer
Test pattern.Wherein, single label inventory dot pattern refers to that radio frequency reader to be tested continues to radio frequency reader
Test equipment send meet super high frequency radio frequency identification air-interface standard the radiofrequency signal (modulating-coding comprising querying command
Signal).Due to make use of agreement operating process as defined in standard, therefore for different types of radio frequency reader, as long as it is abided by
Follow the standard, special change need not be carried out during test, thus facilitate adaptation of the radio frequency reader end to test, save
The cost of test operation.Specifically, the super high frequency radio frequency identification air-interface standard includes GB/T 29768《Information technology is penetrated
Frequency identification 800/900MHz air interface protocols》、ISO-18000-6C、GJB7377.1《Military radio frequency identification air interface the 1st
Part：800/900MHz parameters》.With GJB7377.1《Military radio frequency identification air interface part 1：800/900MHz parameters》
Exemplified by agreement, the state transition of single label inventory dot pattern is as shown in Figure 2.Radio frequency reader in SBR
Test equipment, receive inquiry (Query) order that radio frequency reader to be tested is sent, the test equipment hair of radio frequency reader
Send RN11 and CRC5 (random number and check code) and jump to response status, when the volume for receiving radio frequency reader transmission to be tested
Code obtains (ACK) order, and the test equipment of radio frequency reader sends coding information and jumps to open state.Now, complete
To single label inventory procedure of radio frequency reader to be tested.Wherein, command frame format can be entirely by reference to GJB7377.1《It is military
Radio frequency identification air interface part 1：800/900MHz parameters》Agreement.Wherein, the test equipment of radio frequency reader receives to be measured
The radiofrequency signal that the radio frequency reader of examination is sent, and the radiofrequency signal is parsed, obtain the parsing of the radiofrequency signal
Content.
In step s 2, when the parsing content of the radiofrequency signal includes querying command, with the load of the radiofrequency signal
Ripple is that carrier returns to the simulation label signal containing random number and check code to the radio frequency reader to be tested.
In the present embodiment, the simulation label signal is modulated on the carrier wave of the radiofrequency signal, and uses ASK
The simulation label signal is modulated on the carrier wave of received radiofrequency signal by modulation system, and ASK modulation can use switching
The pad value of attenuator is realized.Wherein, when the parsing content of the radiofrequency signal includes querying command, the survey of radio frequency reader
Examination equipment is returned using the carrier wave of the radiofrequency signal as carrier to the radio frequency reader to be tested contains random number and verification
The simulation label signal of code.
In step s3, the coding that the radio frequency reader to be tested is sent for the simulation label signal is received to obtain
Order is taken, and the coding is obtained into the random number contained in order and check code respectively with containing in the simulation label signal
Random number and check code be compared, obtain comparison result.
In a particular embodiment, before step S3 is carried out, the test equipment reception of radio frequency reader is to be tested
The radiofrequency signal that radio frequency reader is sent for the simulation label signal, and the radiofrequency signal is parsed, obtain institute
State the parsing content of radiofrequency signal.When the parsing content of the radiofrequency signal, which includes coding, obtains order, radio frequency reader
Test equipment confirms that receiving the coding that the radio frequency reader to be tested is sent for the simulation label signal obtains life
Order.Wherein, the test equipment of radio frequency reader receives the radio frequency reader to be tested for the simulation label signal hair
The coding that send obtains order, and by the coding obtain the random number contained in order and check code respectively with the simulation label
The random number and check code contained in signal is compared, and obtains comparison result.
In step s 4, according to the transmission power of the comparison result adjustment simulation label signal, with described in determination
The sensitivity of radio frequency reader to be tested.
In a particular embodiment, the step includes：Order is obtained when obtaining the coding according to the comparison result
In the random number that contains and check code respectively with the random number and identical check code contained in the simulation label signal when, it is determined that
The transmission power of the simulation label signal is the sensitivity of the radio frequency reader to be tested；When according to the comparison result
Obtain the coding obtain the random number that contains and check code in order and the random number that contains in the simulation label signal and
During check code difference, the transmission power of the simulation label signal is adjusted, and repeats above-mentioned steps S1~S4, until described
Coding obtains the random number contained in order and check code and simulates the random number contained in label signal and verification with described respectively
Code-phase is same.Wherein, the test equipment of radio frequency reader is according to the comparison result adjustment transmitting work(for simulating label signal
Rate, to determine the sensitivity of the radio frequency reader to be tested.
In the present embodiment, the test equipment of radio frequency reader receives the radio frequency letter that radio frequency reader to be tested is sent
Number, and the radiofrequency signal is parsed, obtain the parsing content of the radiofrequency signal；When in the parsing of the radiofrequency signal
Appearance is when including querying command, using the carrier wave of the radiofrequency signal be carrier to the radio frequency reader return to be tested containing with
The simulation label signal of machine number and check code；The radio frequency reader to be tested is received again for the simulation label signal hair
The coding that send obtains order, and by the coding obtain the random number contained in order and check code respectively with the simulation label
The random number and check code contained in signal is compared, and obtains comparison result；Finally according to comparison result adjustment
The transmission power of label signal is simulated, to determine the sensitivity of the radio frequency reader to be tested, can accurately test radio frequency
The sensitivity of reader.
Fig. 3 is the flow chart of the Packet Error Ratio method of testing for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 3
Shown, the Packet Error Ratio method of testing for the radio frequency reader that the embodiment of the utility model one provides includes：
In step L1, the radiofrequency signal that radio frequency reader to be tested is sent is received, and the radiofrequency signal is carried out
Parsing, obtain the parsing content of the radiofrequency signal.
Before step L1, user can pass through the work(of simulation label signal caused by host computer manual configuration test equipment
Rate value, so as to test Packet Error Ratio of the radio frequency reader under the performance number.Certainly, before step L1, it is also necessary to will treat
The radio frequency reader of test is configured to single label inventory dot pattern.Wherein, the test equipment of radio frequency reader to be tested connects
The radiofrequency signal that radio frequency reader to be tested is sent is received, and the radiofrequency signal is parsed, obtains the radiofrequency signal
Parsing content.
In step L2, when the parsing content of the radiofrequency signal includes querying command, with the load of the radiofrequency signal
Ripple is that carrier returns to the simulation label signal containing random number and check code to the radio frequency reader to be tested, and to described
Querying command is counted.
In the present embodiment, the processor in the test equipment of radio frequency reader counts to the querying command, obtains
Obtain the number that test equipment receives the querying command that radio frequency reader to be tested is sent.Wherein, when the radiofrequency signal
When parsing content includes querying command, the test equipment is penetrated using the carrier wave of the radiofrequency signal as carrier to described to be tested
Frequency reader returns to the simulation label signal containing random number and check code, and the querying command is counted.
In step L3, receive the coding that the radio frequency reader to be tested is sent for the simulation label signal and obtain
Order is taken, and the coding is obtained into the random number contained in order and check code respectively with containing in the simulation label signal
Random number and check code be compared, obtain comparison result.
Wherein, the test equipment receives what the radio frequency reader to be tested was sent for the simulation label signal
Coding obtains order, and by the coding obtain in order the random number that contains and check code respectively with the simulation label signal
In the random number that contains and check code be compared, obtain comparison result.
In step L4, determine that the radio frequency to be tested is read according to the counting of the comparison result and the querying command
The Packet Error Ratio of device.
In a particular embodiment, the step includes：Order is obtained when obtaining the coding according to the comparison result
In the random number that contains and check code respectively with the random number and identical check code contained in the simulation label signal when, for
The coding obtains order and produces tag responses signal, and the tag responses signal is counted, and repeats above-mentioned step
Rapid L1~L4, until length of testing speech reaches the duration of preset time period；Obtained when obtaining the coding according to the comparison result
When the random number and check code contained in order is with the random number and check code difference contained in the simulation label signal, repeat
Above-mentioned steps L1~L4 is performed, until length of testing speech reaches the duration of preset time period；When the length of testing speech reaches described pre-
If during the duration of period, according to the counting of the querying command in the preset time period and the meter of the tag responses signal
The Packet Error Ratio of the radio frequency reader to be tested is calculated in number.Wherein, the preset time period can be by people in the art
Member is set by the host computer being connected with test equipment.
Wherein, it is calculated according to the counting of the querying command and the counting of the tag responses signal described to be tested
Radio frequency reader Packet Error Ratio, including：The counting of the querying command is subtracted into the counting of the tag responses signal, obtained
The difference of the counting and the counting of the tag responses signal of the querying command；By the counting of the querying command and the mark
The difference of counting divided by the counting of the querying command of answer signal are signed, the radio frequency reader to be tested is obtained and is testing
Packet Error Ratio under the current transmission power of equipment.
In the present embodiment, the test equipment of radio frequency reader receives the radio frequency letter that radio frequency reader to be tested is sent
Number, and the radiofrequency signal is parsed, obtain the parsing content of the radiofrequency signal；When in the parsing of the radiofrequency signal
Appearance is when including querying command, using the carrier wave of the radiofrequency signal be carrier to the radio frequency reader return to be tested containing with
The simulation label signal of machine number and check code, and the querying command is counted；The radio frequency to be tested is received again to read
Read the coding that device is sent for the simulation label signal and obtain order, and the coding is obtained to the random number contained in order
It is compared respectively with the random number and check code contained in the simulation label signal with check code, obtains comparison result；Most
The Packet Error Ratio of the radio frequency reader to be tested is determined according to the counting of the comparison result and the querying command afterwards, can
Packet Error Ratio of the accurate test radio frequency reader under the current transmission power of test equipment.
Fig. 4 is the structural representation of the test equipment for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 4 institutes
Show, the test equipment for the radio frequency reader that the embodiment of the utility model one provides includes：Directional coupler 1, signal processing apparatus,
Processor 4, the first attenuator 5 and the second attenuator 6；The input and output end of the signal processing apparatus respectively with it is described fixed
Being connected to coupler 1 and the processor 4, first attenuator 5 is connected with the directional coupler 1 and the processor 4,
Second attenuator 6 is connected with first attenuator 5 and the processor 4, and the directional coupler 1 will come to be tested
Radio frequency reader radiofrequency signal be divided into output to the signal processing apparatus first via signal and second road signal and
Export the 3rd road signal to first attenuator 5；The signal processing apparatus is according to the first via signal and described
Two road signals produce the data signal for being suitable to the processor 4 identification, and the data signal is exported to the processor 4；
The first control that the data signal that the processor 4 exports according to the signal processing apparatus produces first attenuator 5 is believed
Number and second attenuator 6 the second control signal；First attenuator 5 is according to first control signal and described
Three road signals produce the first simulation label signal containing random number and check code；Second attenuator 6 is according to described second
Control signal and the first simulation label signal produce the second simulation label signal that transmission power is adjusted, and by described in
Second simulation label signal is sent to the radio frequency reader to be tested；The processor 4 always according to the data signal and
The first simulation label signal produces the comparison signal of the random number and check code, and according to the comparison signal and described
The transmission power of second simulation label signal produces the first test result signal of the radio frequency reader to be tested.Take this,
It can accurately test to obtain the sensitivity of radio frequency reader.
Wherein, the processor can be FPGA or FPGA and ARM combination.First attenuator 5 is according to described first
Control signal produces the information containing random number and check code, and by the modulates information containing random number and check code to described the
On the carrier wave of three road signals.Specifically, first attenuator 5 is by the modulates information containing random number and check code to described
Mode on the carrier wave of three road signals is ASK modulation mode, and the ASK modulation mode can be by using the first attenuator 5 of switching
Pad value realize.In a particular embodiment, when the data signal includes querying command, the processor 4 produces
Second control signal of the first control signal of first attenuator 5 and second attenuator 6.First attenuator 5
The first simulation label signal containing random number and check code is produced according to first control signal and the 3rd road signal；
Second attenuator 6 produces transmission power and is adjusted according to second control signal and the first simulation label signal
Second simulation label signal, and by described second simulation label signal send to the radio frequency reader to be tested.It is described
Radio frequency reader to be tested produces the radiofrequency signal that order is obtained containing coding according to the described second simulation label signal, and will
The radiofrequency signal for containing coding acquisition order is sent to test equipment.Pass through the directional coupler 1 and signal in test equipment
Processing unit is handled the radiofrequency signal for containing coding acquisition order accordingly, is obtained this and is contained coding acquisition order
Data signal corresponding to radiofrequency signal.It will be apparent that the data signal, which contains coding, obtains order, the processor 4 is by the volume
Code obtains the random number contained in order and check code and simulates the random number contained in label signal and school with described first respectively
Test code to be compared, obtain and compare signal.If it is described compare signal for the coding obtain in order the random number that contains and
Check code is identical with the random number and check code contained in the described first simulation label signal respectively, then marks the described second simulation
The transmission power of label signal is defined as the sensitivity of radio frequency reader to be tested.If the comparison signal obtains for the coding
Take the random number and check code of the random number contained in order and check code respectively with containing in the described first simulation label signal
Difference, then reduce the pad value of the second attenuator 6, the transmission power of increase the second simulation label signal, repeat above-mentioned mistake
Journey, until the coding obtains the random number contained in order and check code respectively with containing in the described first simulation label signal
Random number it is identical with check code.In this process, radio frequency reader to be tested is being not received by test equipment transmission
The second simulation label signal when, produce and include the radiofrequency signal of querying command.Radio frequency reader to be tested is receiving survey
When trying the second simulation label signal that equipment is sent, the radiofrequency signal that order is obtained comprising coding is produced.Wherein, followed for the first time
During ring, the pad value of the second attenuator 6 is defaulted as the pad value of maximum, with the continuous propulsion of circulation, the second decay
The pad value of device 6 constantly reduces, and the transmission power of the second simulation label signal constantly increases, until the coding is obtained in order
The random number and check code contained is identical with the random number and check code contained in the described first simulation label signal respectively.Work as institute
State coding and obtain the random number of the random number contained in order and check code respectively with containing in the described first simulation label signal
Identical with check code, then the transmission power of the described second simulation label signal is defined as radio frequency reading to be tested by processor 4
The sensitivity of device, so as to accurately test to obtain the sensitivity of radio frequency reader.Wherein, the first test result signal tool
Body is the sensitivity of radio frequency reader.
Alternatively, the signal processing apparatus includes：The demodulating equipment 2 that is connected with the directional coupler 1 and with institute
State the first sampling apparatus 3 that demodulating equipment 2 and the processor 4 connect, the demodulating equipment 2 using the second road signal as
Local oscillation signal, and the first via signal is demodulated according to the local oscillation signal, the analog signal after being demodulated；It is described
First sampling apparatus 3 is sampled and nursed one's health to the analog signal after the demodulation, obtains the number for being suitable to processor identification
Word signal.
Specifically, the straight-through end of the directional coupler 1 and coupled end are connected with the demodulating equipment 2 respectively, described fixed
It is connected to the isolation end of coupler 1 with first attenuator 5.Wherein, the demodulating equipment 2 will come from the directional coupler
The second road signal of coupled end the first via signal is demodulated as local oscillation signal, and according to the local oscillation signal,
It can so ensure that test equipment keeps same frequency with the radio frequency reader moment to be tested.First is received in processor 4 to adopt
After the data signal that sampling device 3 is sent, the content of the data signal is parsed, and according to the content-control of the data signal the
One attenuator 5 produces corresponding first simulation label signal.
In the optional embodiment of the utility model one, the equipment also includes：Power detection device, declined with described second
Subtract device 6 and the processor 4 connects；The power detection device produces the of the transmission power of the second simulation label signal
One detection signal, and the first detection signal is sent to the processor.Take this, the second simulation label signal can be obtained
Transmission power.
In the optional embodiment of the utility model one, the power detection device includes：Connect with second attenuator 6
The power splitter 7 that connects, the power detection device 8 being connected with the power splitter 7 and with the power detection device 8 and the processing
The second sampling apparatus 9 that device 4 connects, the described second simulation label signal is divided into the equal two-way of power by the power splitter 7 to be believed
Number；The power detection device 8 produces the second detection signal of the transmission power of the signal all the way in the two paths of signals；It is described
Second detection signal is converted to data signal by the second sampling apparatus 9 by analog signal, and second after conversion is detected
Signal is transmitted to the processor 4.Wherein, the signal all the way in the two paths of signals is used for power detection, and another way signal is used
In being sent to radio frequency reader to be tested.The signal power that power detection device 8 detects is to be sent to be tested penetrate
The performance number of second simulation label signal of frequency reader.The transmission power of the second simulation label signal can caused by test equipment
Adjust, adjusting range is depending on the type selecting of the directional coupler 1 and the type selecting of the second attenuator 6.
In a particular embodiment, the effect of directional coupler 1 is by the radio frequency of radio frequency reader transmission to be tested
Signal is divided into three tunnels, leads directly to end signal and is used for reader command demodulation parsing, couples local oscillator of the end signal as demodulating equipment 2,
Isolate end signal to be used to modulate the information containing random number and check code.Demodulating equipment 2 is mainly down coversion, by radio frequency reader
Order separated from high-frequency signal so as to subsequent processor 4 carry out command analysis.First sampling apparatus 3 includes adopting for AD
Sample equipment and modulate circuit, convert analog signals into the data signal that processor 4 can identify.Processor 4 is main portion
Point, it is responsible for command analysis, attenuator controls, performance number parses, is communicated with host computer.The function of first attenuator 5 is to produce most
The whole simulation label signal of first with protocol information.The effect of second attenuator 6 is that the first simulation label signal is carried out
Overall power is adjusted.The effect of power splitter 7 is that the second simulation label signal is divided into bisection, is divided into the equal two-way letter of power
Number, all the way for power detection, all the way for radio frequency reader command response.The effect of power detection device 8 is detection simulation
The power of label signal.Second sampling apparatus 9 is AD samplings, converts analog signals into the numeral that processor 4 can identify
Signal.
Alternatively, the processor always according to the data signal produce count signal, and according to it is described comparison signal and
The count signal produces the second test result signal of the radio frequency reader to be tested.Take this, can accurately test and penetrate
Packet Error Ratio of the frequency reader under the current transmission power of test equipment.
In a particular embodiment, when the data signal includes querying command, the processor 4 produces described
Second control signal of the first control signal of one attenuator 5 and second attenuator 6, and the querying command is counted
Number, produce the count signal of the querying command.First attenuator 5 is according to first control signal and the 3rd tunnel
Signal produces the first simulation label signal containing random number and check code；Second attenuator 6 is according to the described second control
Signal and the first simulation label signal produce the second simulation label signal that transmission power is adjusted, and by described second
Simulation label signal is sent to the radio frequency reader to be tested.The radio frequency reader to be tested is according to second mould
Intend label signal and produce the radiofrequency signal for containing coding acquisition order, and this is contained to radiofrequency signal transmission of coding acquisition order
To test equipment.Contain coding acquisition order to this by the directional coupler 1 in test equipment and signal processing apparatus to penetrate
Frequency signal is handled accordingly, obtains data signal corresponding to the radiofrequency signal that this contains coding acquisition order.It will be apparent that should
Data signal contains coding and obtains order, and the coding is obtained the random number contained in order and check code by the processor 4
It is compared respectively with the random number and check code contained in the described first simulation label signal, obtains and compare signal.If institute
The random number and check code for stating comparison signal in the coding acquisition order to contain simulate label signal with described first respectively
In the random number that contains it is identical with check code, then the processor 4 produces the first control signal and the institute of first attenuator 5
The second control signal of the second attenuator 6 is stated, first attenuator 5 produces according to first control signal and the 3rd road signal
Raw the first tag responses signal that order is obtained for the coding, second attenuator according to second control signal and
The first tag responses signal produces the second tag responses signal that transmission power is adjusted, and the processor 4 is to described
Second tag responses signal is counted, and said process is repeated, until length of testing speech reaches the duration of preset time period.If institute
The random number and check code for stating comparison signal in the coding acquisition order to contain simulate label signal with described first respectively
In the random number that contains and check code it is different, said process is repeated, until length of testing speech reaches the duration of preset time period.Work as institute
When stating length of testing speech and reaching the duration of the preset time period, according to the counting of the querying command in the preset time period and
The Packet Error Ratio that the radio frequency reader to be tested is calculated of the tag responses signal.In this process, treat
The radio frequency reader of test is being not received by the second simulation label signal and the second tag responses signal of test equipment transmission
When, produce the radiofrequency signal for including querying command.Radio frequency reader to be tested is receiving the second mould of test equipment transmission
When intending label signal, the radiofrequency signal that order is obtained comprising coding is produced.Radio frequency reader to be tested is set receiving test
During the second tag responses signal that preparation is sent, the radiofrequency signal for including querying command is produced.Wherein, the second test result letter
Number be specially Packet Error Ratio of the radio frequency reader under test equipment current transmission power.
Fig. 5 is the structural representation of the test system for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 5 institutes
Show, the test system for the radio frequency reader that the embodiment of the utility model one provides includes：The test equipment that above-described embodiment provides
14；Host computer 13, it is connected with the test equipment 14, the host computer is supported according to the radio frequency reader to be tested
The testing standard of test equipment described in standard update.Take this, it is real-time the standard that radio frequency reader to be tested is supported can be directed to
Ground updates the testing standard of the test equipment.
In a particular embodiment, the interface shape of test equipment 14 and host computer is network interface.
In the optional embodiment of the utility model one, the system also includes：Circulator 12, with the test equipment 14
Connected respectively with the radio frequency reader 11 to be tested；The circulator 12 receives the radio frequency reader to be tested and sent
Radiofrequency signal and send the second simulation label signal to the radio frequency reader to be tested.Take this, be easy to signal
Send and receive.
In a particular embodiment, radio frequency reader 11 to be tested passes through the straight-through end of circulator 12 and test equipment
14 input is connected, and the output port of test equipment is connected with the coupled end of circulator 12.
In the optional embodiment of the utility model one, the host computer 13 is read according to the default radio frequency to be tested
The Insertion Loss value of connection cables between device and the test equipment, the Insertion Loss value of the circulator and first test is read to tie
Fruit signal produces the 3rd test result signal by calibration.Take this, it is ensured that test obtained radio frequency reader to be tested
Sensitivity accuracy.
In a particular embodiment, the connection cables between the frequency read/write 11 to be tested and test equipment 14
Insertion Loss value and the Insertion Loss value of circulator be filled on the software interface of host computer after test equipment connection present cable and
Current annular device Insertion Loss value.Detect to obtain contained random number and verification in ACK orders in the power detection device of test equipment 14
When code division is not with the transmission power level for simulating label signal when the random number and consistent check code in simulation label signal, processing
The performance number is uploaded to host computer by device, and the performance number is subtracted the default radio frequency reader to be tested and institute by host computer
The Insertion Loss value of the connection cables between test equipment and the Insertion Loss value of the circulator are stated, obtains radio frequency reader to be tested
Sensibility in practice.Take this, it is ensured that test the accuracy of the sensitivity of obtained radio frequency reader to be tested.Wherein,
Three test result signals are specially the sensibility in practice of radio frequency reader to be tested.
In a particular embodiment, the software function of host computer includes：Each standard switching, switching mode can be selected down
Menu-style or other forms, concrete form is drawn not to be limited.The working interface of each standard switches including both of which, and one
Kind is sensitivity automatic test pattern, and another kind is sensitivity Packet Error Ratio test pattern.Wherein, sensitivity automatic test pattern
Under, it can at least show present day analog tag signal power i.e. reader sensitivity text box, and not editable；Possess circulation to survey
Number text box is tried, and is editable text frame；Possess and start test with stopping the functions such as test option.Sensitivity Packet Error Ratio is surveyed
Under die trial formula, possess record and receive reader command number and answer signal emitting times text box, and not editable；Possesses work(
Rate adjusts text box, and is editable text frame；Show that present day analog tag signal power is reader sensitivity text box, and
Not editable；Show Packet Error Ratio text box, and not editable；Possess test and complete prompt facility etc..
Fig. 6 is the flow chart of the sensitivity test method for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 6
Shown, the pad value of the second attenuator is defaulted as maximum attenuation value, and the processor in the test equipment of radio frequency reader is known first
Whether include querying command in the radiofrequency signal that radio frequency reader not to be tested is sent, if including querying command, handle
Device controls the first attenuator to produce the first simulation label signal containing RN11 and CRC5 (random number and check code), and controls the
Two attenuators are adjusted to the transmission power of the first simulation label signal, obtain the second simulation mark that transmission power is adjusted
Signal is signed, and the second simulation label signal is sent to radio frequency reader to be tested, and waits radio frequency reader to be tested
The ACK orders of transmission (coding obtains order).After the ACK orders that radio frequency reader to be tested is sent are received, processing
Device is compared contained random number in ACK orders and check code with the check code in the first simulation label signal and random number respectively
It is right, and according to comparison result determine in ACK orders contained random number and check code respectively with the school in the first simulation label signal
Test whether code is consistent with random number, if it is inconsistent, processor turns the pad value of the second attenuator, increase simulation label letter down
Number transmission power, above procedure is repeated, until contained random number in ACK orders and check code are respectively with simulating in label signal
Random number it is consistent with check code.When contained random number in ACK orders and check code respectively with simulation label signal in it is random
When number is consistent with check code, processor controls the first attenuator to produce acknowledgement character response order and is sent to radio frequency to be tested and reads
Device, and pass through the performance number of power detection device detection acknowledgement character response order.Detection obtain acknowledgement character response order performance number it
Afterwards, processor records the performance number and is uploaded to host computer, and user can read the power by the software interface of host computer
Value, the performance number read are the sensitivity of radio frequency reader to be tested.Certainly, the utility model embodiment not limited to this,
When contained random number in ACK orders and check code are respectively with the random number in simulation label signal and during consistent check code, processing
The performance number that device can also be sent to the simulation label signal of radio frequency reader to be tested according to the last time of record determines to treat
The sensitivity of the radio frequency reader of test.
Fig. 7 is the flow chart of the Packet Error Ratio method of testing for the radio frequency reader that the embodiment of the utility model one provides.Such as Fig. 7
It is shown, before the test of Packet Error Ratio of radio frequency reader is carried out, the test equipment of radio frequency reader is set by host computer
Transmission power.Processor in the test equipment of reader identifies in the radiofrequency signal that radio frequency reader to be tested is sent first
Whether include querying command, if including querying command, processor control the first attenuator produce containing RN11 and CRC5 (with
Machine number and check code) first simulation label signal, and control the second attenuator to first simulation label signal transmission power
It is adjusted, obtains the second simulation label signal that transmission power is adjusted, and the second simulation label signal is sent to and treated
The radio frequency reader of test, and querying command is counted using the first counter in processor, and wait to be tested
The ACK orders that radio frequency reader is sent (coding obtains order).Receiving the ACK orders of radio frequency reader transmission to be tested
Afterwards, processor by contained random number in ACK orders and check code respectively with the check code in the first simulation label signal and with
Machine number is compared, and determines that contained random number and check code simulate label with first respectively in ACK orders according to comparison result
Whether the check code in signal is consistent with random number, if unanimously, processor controls the first attenuator and the second attenuator to produce
Tag responses signal for ACK orders is simultaneously sent to radio frequency reader to be tested, while second using processor counts
Device counts to tag responses signal, above procedure is repeated, until length of testing speech reaches the duration of preset time period.If no
Unanimously, then repeatedly above procedure, until length of testing speech reaches the duration of preset time period.When the length of testing speech reaches described pre-
If during the duration of period, according to the counting of the querying command in the preset time period and the meter of the tag responses signal
The Packet Error Ratio of the radio frequency reader to be tested is calculated in number.Set in the radio frequency reader for being calculated to be tested in test
After Packet Error Ratio under standby current transmission power, processor record result of calculation is simultaneously uploaded to host computer, and user can be by upper
The software interface of position machine reads the Packet Error Ratio of radio frequency reader to be tested under the current transmission power of test equipment.When logical
When crossing the transmission power of host computer adjustment test equipment, the transmission times of tag responses signal and the querying command of radio frequency reader
Reception number all should count from zero.In the case where closing radio frequency reader to be tested, the mistake of reader can be stopped
Bag rate is tested.Wherein, the duration of the Packet Error Ratio test of radio frequency reader can be specific according to being actually needed by those skilled in the art
Setting.
Radio frequency reader receiving sensitivity is the Key Performance Indicator of radio frequency reader, develops a set of advanced radio frequency and reads
The test system of device is read, the research and development and production for REID and product provide a reliable Evaluation Environment.By not
Technology evaluation result is regularly published, relevant industrial department and investigative technique personnel can be allowed to understand at present the present situation of i.e. front-end technology
And performance indications, new target is worked out for later research and development, will also study China, develop the summary of progress series,
Promote in different field research, exploitation and application, displaying, Demonstration Platform are provided for industry application.
It should be noted that in all parts of system of the present utility model, according to the function that it to be realized to it
In part carried out logical partitioning, still, the utility model is not only restricted to this, all parts can be carried out as needed weight
New division or combination, for example, can be single part by some component combinations, or can further decompose some parts
For more subassemblies.
All parts embodiment of the present utility model can realize with hardware, or with one or more processor
The software module of operation is realized, or is realized with combinations thereof.It will be understood by those of skill in the art that can be in practice
Using microprocessor or digital signal processor (DSP) come realize in the system according to the utility model embodiment some or
The some or all functions of person's whole part.The utility model is also implemented as performing method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).Such realization
Program of the present utility model can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from internet website and obtained, and either be provided or with any other shape on carrier signal
Formula provides.
The utility model is limited it should be noted that above-described embodiment illustrates rather than to the utility model,
And those skilled in the art can design alternative embodiment without departing from the scope of the appended claims.In right
In it is required that, any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not arranged
Except element or step not listed in the claims being present.Word "a" or "an" before element does not exclude the presence of more
Individual such element.The utility model can be by means of including the hardware of some different elements and by means of properly programmed
Computer is realized.In if the unit claim of equipment for drying is listed, several in these devices can be by same
One hardware branch embodies.The use of word first, second, and third does not indicate that any order.Can be by these lists
Word is construed to title.
Embodiment of above is only suitable to explanation the utility model, and is not limitation of the utility model, relevant technology neck
The those of ordinary skill in domain, in the case where not departing from spirit and scope of the present utility model, can also make a variety of changes and
Modification, therefore all equivalent technical schemes fall within category of the present utility model, scope of patent protection of the present utility model should
It is defined by the claims.
Claims (8)
1. a kind of test equipment of radio frequency reader, it is characterised in that the equipment includes：
Directional coupler, signal processing apparatus, processor, the first attenuator and the second attenuator；
The input and output end of the signal processing apparatus are connected with the directional coupler and the processor respectively, described
First attenuator is connected with the directional coupler and the processor, second attenuator and first attenuator and institute
Processor connection is stated,
Radiofrequency signal from radio frequency reader to be tested is divided into output to the signal processing device by the directional coupler
The first via signal and second road signal put and export the 3rd road signal to first attenuator；
The signal processing apparatus produces according to the first via signal and the second road signal is suitable to processor identification
Data signal, and the data signal is exported to the processor；
The data signal that the processor exports according to the signal processing apparatus produces the first control of first attenuator
Second control signal of signal and second attenuator；
First attenuator produces according to first control signal and the 3rd road signal contains random number and check code
First simulation label signal；
Second attenuator produces transmission power and passed through according to second control signal and the first simulation label signal
Second simulation label signal of adjustment, and the described second simulation label signal is sent to the radio frequency reader to be tested；
The processor produces the random number and check code always according to the data signal and the first simulation label signal
Comparison signal, and according to it is described comparison signal and it is described second simulation label signal transmission power produce it is described to be tested
First test result signal of radio frequency reader.
2. equipment according to claim 1, it is characterised in that the signal processing apparatus includes：
The demodulating equipment being connected with the directional coupler and what is be connected with the demodulating equipment and the processor first adopt
Sampling device,
The demodulating equipment is believed the first via using the second road signal as local oscillation signal according to the local oscillation signal
Number it is demodulated, the analog signal after being demodulated；
First sampling apparatus is sampled and nursed one's health to the analog signal after the demodulation, is obtained and is suitable to processor knowledge
Other data signal.
3. equipment according to claim 1 or 2, it is characterised in that the equipment also includes：
Power detection device, it is connected with second attenuator and the processor；
The power detection device produces the first detection signal of the transmission power of the second simulation label signal, and by described in
First detection signal is sent to the processor.
4. equipment according to claim 3, it is characterised in that the power detection device includes：
The power splitter that is connected with second attenuator, the power detection device being connected with the power splitter and with the power
The second sampling apparatus that detection means connects with the processor,
Described second simulation label signal is divided into the equal two paths of signals of power by the power splitter；
The power detection device produces the second detection signal of the transmission power of the signal all the way in the two paths of signals；
Second detection signal is converted to data signal by second sampling apparatus by analog signal, and by after conversion
Two detection signals are transmitted to the processor.
5. equipment according to claim 1, it is characterised in that the processor produces counting always according to the data signal
Signal, and according to the comparison signal and the second test result of the count signal generation radio frequency reader to be tested
Signal.
6. a kind of test system of radio frequency reader, it is characterised in that the system includes：
According to the test equipment described in any one claim in Claims 1 to 5；
Host computer, it is connected with the test equipment,
The test mark of host computer test equipment according to the standard update that the radio frequency reader to be tested is supported
It is accurate.
7. system according to claim 6, it is characterised in that the system also includes：
Circulator, it is connected respectively with the test equipment and the radio frequency reader to be tested；
The circulator receives the radiofrequency signal that the radio frequency reader to be tested sends and to the radio frequency to be tested
Reader sends the second simulation label signal.
8. system according to claim 7, it is characterised in that the host computer is according to the default radio frequency to be tested
The Insertion Loss value of connection cables between reader and the test equipment, the Insertion Loss value of the circulator and first test
Consequential signal produces the 3rd test result signal by calibration.
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| CN110755821A (en) * | 2019-09-24 | 2020-02-07 | 中国地质大学（北京） | Multi-project all-purpose card system for physical fitness and use method thereof |
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| CN110755821A (en) * | 2019-09-24 | 2020-02-07 | 中国地质大学（北京） | Multi-project all-purpose card system for physical fitness and use method thereof |
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