CN104007381B - A kind of method of reference signal in quick test radiofrequency signal system - Google Patents
A kind of method of reference signal in quick test radiofrequency signal system Download PDFInfo
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- CN104007381B CN104007381B CN201410251895.6A CN201410251895A CN104007381B CN 104007381 B CN104007381 B CN 104007381B CN 201410251895 A CN201410251895 A CN 201410251895A CN 104007381 B CN104007381 B CN 104007381B
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
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Abstract
The invention discloses a kind of method of reference signal in quick test radiofrequency signal system, this method comprises the following steps：RFID essential informations in electronic tag are set；Reader is set ,/identification circuit generation reference signal is produced by radio frequency, reader outwardly sends radio frequency identification signal；Radio frequency identification signal is modulated to square-wave signal by electronic tag by modulating, and sets the frequency of radiofrequency signal between 0.1MHz~1MHz；Electronic tag sends response signal to reader；The waveform of the response is decomposed into the sawtooth profile of monotone increasing and/or monotonic decreasing, by sawtooth profile compared with the expected value preserved in advance, differentiates whether the function of electronic tag is realized.The present invention improves the efficiency of test radiofrequency signal system reference signal, square wave is modulated to sawtooth waveforms, without frequently change test equipment when testing the radio frequency reference signal of varying level, the efficiency of test benchmark signal greatly improves, and overcomes the defects of R＆D cycle is long, testing efficiency is low.
Description
Technical field
The present invention relates to base in a kind of method of test benchmark signal, more particularly to a kind of quick test radiofrequency signal system
The method of calibration signal.
Background technology
REID（Radio Frequency Identification, RFID）It is that one kind is wide variety of certainly
Dynamic identification technology, it passes through Space Coupling using radiofrequency signal（Alternating magnetic field or electromagnetic field）Realize contactless information transmission
And identifying purpose is reached by the information of transmission.As a kind of contactless automatic identification technology, its principle is with electromagnetism
Field is medium, and the interaction of energy and information is carried out using label and reader as core, realizes the automatic identification to target object, with
Bar code, magnetic card, Contact Type Ic Card are compared, and RFID identification technology has that untouchable, read or write speed is efficient and convenient, memory capacity
Greatly, recognition efficiency is high and many advantages, such as security performance is good, has been widely used in every field.From the basic of information transmission
For principle, REID is based on transformer coupled model in low-frequency range（Energy transmission and letter between primary and secondary
Number transmit）, in Space Coupling model of the high band based on radar detection target（Radar emission electromagnetic wave signal is taken after encountering target
Band target information returns to radar receiver）.What Harry's Stockman in 1948 was delivered《Utilize the communication of reflection power》Establish
The theoretical foundation of REID.Nowadays radio-frequency technique is widely used in various fields, such as：TV, broadcast, mobile electricity
Words, radar, automatic recognition system etc., setting the product of such radio-frequency enabled will refer to before being delivered for use by a series of radio frequencies
Mapping is tried, and could be listed after test passes.Radio-frequency recognition system is related to two entities：Reader and label, reader and label
Between communicated using radio RF recognition technology, read write line by label carry out operation complete information read-write, radio frequency
Identify that measuring technology is for weighing the important means with difficult radio frequency identification equipment and application environment etc..At present, radio frequency identification is surveyed
Method for testing is concentrated mainly in terms of preventing the non-safety functions such as conflict, the modulating frequency degree of accuracy, traffic rate, right in the prior art
Space state is still in the test for how quickly carrying out reference signal.
The content of the invention
It is an object of the invention to provide a kind of method of reference signal in quick test radiofrequency signal system, RFID is submitted
The production test efficiency of rfid circuit, solves shortcoming existing for prior art.
The present invention adopts the following technical scheme that realization：
A kind of method of reference signal in quick test radiofrequency signal system, it is characterised in that this method includes following step
Suddenly：
1）RFID essential informations in electronic tag are set；
2）Reader is set ,/identification circuit generation reference signal is produced by radio frequency, reader outwardly sends radio frequency knowledge
Level signal；
4）Electronic tag receives the radio frequency identification signal of reader, and radio frequency identification signal is modulated into square wave by modulating
Signal, the frequency of radiofrequency signal is set between 0.1MHz~1MHz, until waveform stabilization, electronic tag is sent to reader to be rung
Induction signal；
5）Between a cycle, the waveform of the response is decomposed into the zigzag of monotone increasing and/or monotonic decreasing
Waveform；
6）Repeat step 5）Until waveform stabilization, by the sawtooth profile compared with the expected value preserved in advance,
Differentiate whether the function of electronic tag is realized.
Further, the frequency of radiofrequency signal is 0.1MHz, 0.5MHz or 1MHz.
Further, the time of waveform stabilization continues more than 500 milliseconds.
Further, in addition to step 7）：Based on the master control of reader and one by controlling tested radio frequency identification signal
Calculation machine is connected, and sets pulse width and the cycle of sawtooth signal, and send inquiry from main control computer to envelope detected instrument
Instruction, demodulated envelope Wave data is inquired about, inquiry gained envelope waveform data result feeds back to main control computer, to the bag received
Whether network Wave data carries out achievement data calculating and is saved into memory, by the waveform judge index data of envelope just
Normal scope.
The method have the benefit that：The efficiency of test radiofrequency signal system reference signal is improved, by square wave
Sawtooth waveforms is modulated to, without frequently change test equipment, unit interval when testing the radio frequency reference signal of varying level
The efficiency of interior test benchmark signal greatly improves, and overcomes the defects of R＆D cycle is long, testing efficiency is low in the prior art.
Brief description of the drawings
Fig. 1 is the oscillogram of non-modulated master reference signal.
Fig. 2 is the oscillogram of the reference signal after ovennodulation.
Embodiment
By the following description to embodiment, it will more contribute to public understanding of the invention, but can't should be by Shen
Given specific embodiment of asking someone is considered as the limitation to technical solution of the present invention, any definition to part or technical characteristic
Be changed and/or make form to overall structure and immaterial conversion is regarded as what technical scheme was limited
Protection domain.
Embodiment 1：The method of reference signal, this method comprise the following steps in a kind of quick test radiofrequency signal system：
1）RFID essential informations in electronic tag are set；
2）Reader is set ,/identification circuit generation reference signal is produced by radio frequency, reader outwardly sends radio frequency knowledge
Level signal；
4）Electronic tag receives the radio frequency identification signal of reader, and radio frequency identification signal is modulated into square wave by modulating
Signal, the frequency of radiofrequency signal is set between 0.1MHz~1MHz, until waveform stabilization；Electronic tag is sent to reader to be rung
Induction signal；
As preferred：The set of frequency of radiofrequency signal is 0.1MHz, 0.5MHz or 1MHz, naturally it is also possible to using other not
Same frequency, experiment prove that when frequency elects above three numerical value as the time of waveform stabilization is relatively short, therefore when test number
When measuring huge, the substantial amounts of testing time can be saved.In other embodiments, a value of radiofrequency signal is 0.35MHz,
For 0.35MHz waveform in addition to this shorter advantage of the time with waveform stabilization, it is that waveform is few to be also equipped with an advantage
Undergo mutation, this advantage not possessed when being other frequency samples, during other waveforms of value, if the duration it is longer can be random
There is the kurtosis of a waveform, its amplitude is the several times of mean amplitude of tide, and this waveform mutation can cause the shakiness of test process
It is fixed, test equipment is sent alarm, hinder testing efficiency.
5）Between a cycle, the waveform of the response is decomposed into the zigzag of monotone increasing and/or monotonic decreasing
Waveform；
6）Repeat step 5）Until waveform stabilization, by the sawtooth profile compared with the expected value preserved in advance,
Differentiate whether the function of electronic tag realizes that the time of waveform stabilization should continue more than 500 milliseconds, less than 500 milliseconds meetings cause
Test ineffective, it is necessary to which retest can just obtain reliable numerical value.
Embodiment 2：Improvement can also be further made on the basis of embodiment 1, increases a step 7）：It will read
Device is used to control the main control computer of tested radio frequency identification signal to be connected with one, sets pulse width and the week of sawtooth signal
Phase, and query statement is sent from main control computer to envelope detected instrument, inquire about demodulated envelope Wave data, inquiry gained envelope
Wave data result feeds back to main control computer, carries out achievement data calculating to the envelope waveform data received and is saved into storage
In device, by the waveform judge index data of envelope whether in normal range (NR).The present embodiment is increased on the basis of embodiment 1
Step 7 is added）, other parts are identical, therefore will not be described here.
According to the regulation of contactless RFID label tag agreement, reader carries out data to pass through electromagnetic wave after ASK modulation
Send, RFID label chip after entering the launching site of reader needs that modulated data is demodulated to come, and is read with completing reception
Read data and the order that device sends over.The method of demodulation ASK signals typically uses envelope detection method, with envelope detection method
Demodulator circuit it is relatively simple for structure, area and power consumption are relatively small, passive RFID tag chip typically using the method carry out
Data demodulate, but prior art is that envelope is extracted by low pass filter, the envelope signal unobvious extracted, bag
Overshoot phenomenon in network signal is easy to make shaping circuit produce false triggering, causes demodulating data to malfunction, it is therefore desirable to be wrapped
Network compares and judged, i.e., the size of the envelope-sampling voltage of reference signal is extracted using main control computer, obtains antenna envelope letter
Number envelope variation edge, then judge the output voltage of comparison circuit, obtain and demodulated output data.Extract envelope and carry out base
The judgement of calibration signal will be helpful to the further accurate difference for determining tested waveform and expected value etc, difficult for detection sawtooth waveforms
The problem of to find, can be detected by its envelope, prevent flase drop or missing inspection, improve the accuracy rate of detection.
Certainly, the present invention can also have other various embodiments, in the case of without departing substantially from spirit of the invention and its essence,
Those skilled in the art can be made according to the present invention it is various it is corresponding change and deformation, but these it is corresponding change and
Deformation should all belong to the protection domain of appended claims of the invention.
Claims (3)
1. a kind of method of reference signal in quick test radiofrequency signal system, it is characterised in that this method comprises the following steps：
1）RFID essential informations in electronic tag are set；
2）Reader is set ,/identification circuit generation reference signal is produced by radio frequency, reader outwardly sends radio frequency identification letter
Number；
3）Electronic tag receives the radio frequency identification signal of reader, and radio frequency identification signal is modulated into square wave by modulation believes
Number, the frequency of radiofrequency signal is set between 0.1MHz~1MHz, until waveform stabilization, electronic tag sends to reader and responded
Signal；
4）Between a cycle, the waveform of the response is decomposed into the sawtooth profile of monotone increasing and/or monotonic decreasing；
5）Repeat step 4）Until waveform stabilization, by the sawtooth profile compared with the expected value preserved in advance, differentiate
Whether the function of electronic tag is realized；
6）Reader is set into sawtooth signal with one for controlling the main control computer of tested radio frequency identification signal to be connected
Pulse width and cycle, and query statement is sent from main control computer to envelope detected instrument, demodulated envelope Wave data is inquired about,
Inquiry gained envelope waveform data result feeds back to main control computer, and achievement data calculating is carried out to the envelope waveform data received
And be saved into memory, by the waveform judge index data of envelope whether in normal range (NR).
2. the method for reference signal in quick test radiofrequency signal system according to claim 1, it is characterised in that radio frequency
The frequency of signal is 0.1MHz, 0.5MHz or 1MHz.
3. the method for reference signal in quick test radiofrequency signal system according to claim 1, it is characterised in that waveform
The stable time continues more than 500 milliseconds.
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| CN104007381B true CN104007381B (en) | 2018-01-02 |
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| JP3570430B1 (en) * | 2003-10-29 | 2004-09-29 | オムロン株式会社 | Loop coil antenna |
| CN101556303B (en) * | 2008-04-08 | 2012-09-26 | 南茂科技股份有限公司 | Wafer test system for integrating radio frequency identification and test method thereof |
| CN101592705A (en) * | 2008-05-28 | 2009-12-02 | 北京中食新华科技有限公司 | Radio frequency identification RFID test system |
| CN101592704A (en) * | 2008-05-28 | 2009-12-02 | 北京中食新华科技有限公司 | Radio frequency identification RFID test method |
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Inventor after: Shao Weiping Inventor after: Yang Hongzhen Inventor after: Wu Hui Inventor after: Xie Tantan Inventor after: Cheng Luming Inventor after: Zhao Jianpeng Inventor after: You Qilin Inventor after: Zhang Mingxi Inventor after: Peng Yao Inventor before: Wang Songhao |
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