CN102445584B - Method for testing working voltage of electronic tag - Google Patents
Method for testing working voltage of electronic tag Download PDFInfo
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- CN102445584B CN102445584B CN2011102828446A CN201110282844A CN102445584B CN 102445584 B CN102445584 B CN 102445584B CN 2011102828446 A CN2011102828446 A CN 2011102828446A CN 201110282844 A CN201110282844 A CN 201110282844A CN 102445584 B CN102445584 B CN 102445584B
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Abstract
The invention discloses a method for testing working voltage of an electronic tag. According to the invention, the speed of a tangential direction of a turntable is utilized to simulate the speed of high-speed linear motion of the RFID (radio frequency identification device) electronic tag in practical application, so that an application scenario of the RFID with the electronic tag being in a high-speed motion state can be effectively simulated in a laboratory; and due to the system, the test space is saved, and the size of test equipment is reduced. Meanwhile, according to the invention, the minimal working voltage of an electronic tag product at different motion speed and different working frequency can be scientifically and repetitively analyzed, so that the influence of motion speed on the different electronic tag products can be obtained.
Description
Technical field
The present invention relates to electron trade REID field, relate in particular to a kind of method of testing working voltage of electronic tag.
Background technology
The RFID full name is radio-frequency (RF) identification (Radio Frequency Identification), is a kind of non-contact automatic identification technology that utilizes radio-frequency technique to realize.Electronic tag has that volume is little, read or write speed is fast, shape is various, long service life, reusable, memory capacity large, can penetrate the characteristics such as non-conductive material, can realize multiple goal identification and moving target identification in conjunction with rfid interrogator, further by the sharing in conjunction with the tracking that can also realize article in global range and information with Internet technology.The RFID technology is applied to the industries such as logistics, manufacture, public information service, can significantly improve management and operational paradigm, reduces costs.
As the core technology of Internet of Things, along with the further popularization of Internet of Things, the develop rapidly of RFID technology, the manufacturer of Related product increases gradually, from hand-held to fixed, the kind of rfid interrogator and label has also risen to hundreds of, and is constantly releasing new product.In order to select can meet the product of user's demand in the rfid interrogator numerous and label, just need to carry out special test to the performance index of RFID product, the electronic tag minimum is one of important performance indexes of electronic tag product.
The electronic tag minimum is that read write line drives the electronic label chip needed minimum voltage that works in the standard test environment that does not have barrier to block, and these performance index mainly are subject to the impact of electronic label antenna design and chip power-consumption.At present, also lack a kind of quantitative analytical approach and equipment and test under motion state, when particularly movement velocity is very fast, the concrete impact that the electronic tag minimum is produced.
Summary of the invention
(1) technical matters that will solve
For solving above-mentioned one or more problems, the invention provides a kind of method of testing working voltage of electronic tag, carry out simple, clear and effective automatic test with the working voltage of electronic tag under motion state.
(2) technical scheme
A kind of test macro of working voltage of electronic tag is provided according to an aspect of the present invention.This system comprises: rotating disk, protective cover, drive motor, drive motor controller, brace table, signal source, signal source emitting antenna, signal source emitting antenna support, spectrum analyzer receiving antenna and spectrum analyzer, and wherein: electronic tag to be measured is arranged at the edge of rotating disk; Rotating disk is mounted on the rotational plane of drive motor; Shielding cover is in rotating disk and electronic tag to be measured outside, and directly over protective cover, there is a rectangular opening centre; Protective cover and drive motor are placed in brace table; The signal source emitting antenna is placed on signal source emitting antenna support; The spectrum analyzer receiving antenna is placed on protective cover, and spectrum analyzer receiving antenna and oblong openings all are positioned on the connecting line at main lobe axle center of the main lobe axle center of signal source emitting antenna and electronic tag built-in aerial to be measured.
Preferably, working voltage of electronic tag test macro of the present invention also comprises: control computing machine, control computing machine and be connected respectively with signal source, spectrum analyzer and drive motor controller by data line, be connected by radio frequency feed line respectively between signal source emitting antenna and signal source, spectrum analyzer receiving antenna and spectrum analyzer; The drive motor controller is connected with drive motor; Control computing machine and send the rotating speed steering order to drive motor controller, make drive motor drive rotating disk with rotational speed, thereby electronic tag to be measured rotates thereupon; Control computing machine to the signal source sending controling instruction, make the controlled read write line of signal source emitting antenna output power and frequency read the electronic tag signal; Spectrum analyzer is by the communication process of spectrum analyzer receiving antenna monitor signal source emitting antenna and electronic tag to be measured.
Preferably, in working voltage of electronic tag test macro of the present invention, drive motor controller, control computing machine, signal source, spectrum analyzer are placed in the outside of fully anechoic chamber; Signal source emitting antenna, signal source emitting antenna support, spectrum analyzer receiving antenna, protective cover, rotating disk, electronic tag to be measured, brace table, drive motor are placed in the inside of fully anechoic chamber.
Preferably, in working voltage of electronic tag test macro of the present invention, signal source emitting antenna support and rotating disk adopt specific inductive capacity to be less than 1.5 material and make; There is the firmware that electronic tag is installed at the edge of rotating disk, and the material of this firmware is consistent with the material of rotating disk.
Preferably, in working voltage of electronic tag test macro of the present invention, the spectrum analyzer receiving antenna is that gain is 2dBi and the above double-dipole antenna of 2dBi; The signal source emitting antenna is that gain is 10dBi and the above standard gain antenna of 10dBi, and in the calibration tape wide region, the gain of signal source emitting antenna remains unchanged.
Preferably, in working voltage of electronic tag test macro of the present invention, signal source is to read with predeterminated frequency and default power stage rfid interrogator the instrument of electronic tag signal, and this predeterminated frequency and default power are by controlling the computer remote adjustment.
Preferably, in working voltage of electronic tag test macro of the present invention, protective cover is that the steel plate that has pasted absorbing material by outside is made; The shell of drive motor is metal material, and one deck absorbing material has been pasted in the outside of shell.
According to another aspect of the present invention, also provide a kind of method of utilizing said system to carry out the working voltage of electronic tag test.The method comprises: steps A: control computing machine and send instruction to drive motor controller, electronic tag is moved with rotating disk with setting speed V, V=2 π Rn/60, R is the label position to the center of turntable position must distance, the rotating speed that n is the drive motor per minute, set the initial communication number of times; Step B: by controlling the emissive power of computer settings signal source, the simulation read write line of signal source emission is read the electronic tag signal frequency; Step C: the electromagnetic signal of the communication process of spectrum analyzer lock-on signal source emitting antenna and electronic tag to be measured, in the electromagnetic signal captured, label signal and label signal are read in demodulation, and number of communications adds 1; Step D: whether number of communications is less than predetermined threshold value, if so, and execution step E, otherwise, execution step H; Step e: judge whether correctly to demodulate the electronic tag signal, if so, execution step F, otherwise, execution step G; Step F, spectrum analyzer sends reads label signal and label signal to controlling the computer terminal record after demodulation, turns down the signal source emissive power, if now the signal source emissive power is non-vanishing, execution step G; Step G, re-execute step C; Step H, will control the operating voltage of computing machine voltage now as electronic tag.
Preferably, in working voltage of electronic tag method of testing of the present invention, step F also comprises: step I, if now the signal source emissive power is zero; And the signal source frequency of operation of record changes, and re-executes step B.
Preferably, in working voltage of electronic tag method of testing of the present invention, step I also comprises: step J, if the signal source emissive power is zero; And the signal source frequency of operation of record does not change; And, when the movement velocity of electronic tag to be measured changes, re-execute steps A.
Preferably, in working voltage of electronic tag method of testing of the present invention, before steps A, also comprise: steps A ', set up respectively the communication connection between control computing machine and signal source, drive motor controller, spectrum analyzer, make signal source and drive motor controller enter readiness for operation, spectrum analyzer enters the frequency domain template trigger mode standby condition of spectrum analyzer.
(3) beneficial effect
The method that the present invention tests working voltage of electronic tag has following beneficial effect:
(1) the present invention utilizes rotating disk tangential direction speed to simulate the high-speed straight-line movement velocity of RFID electronic tag in practical application, can effectively test the lab simulation electronic tag in the RFID of high-speed motion state application scenarios, system has been saved the test space, reduces the testing apparatus volume;
(2) the present invention scientifically and repeatably the analytical electron label product in the minimum of different motion speed and different operating frequency, draw the impact that movement velocity produces different electronic tag products.
The accompanying drawing explanation
The structural representation that Fig. 1 is embodiment of the present invention working voltage of electronic tag test macro;
The process flow diagram that Fig. 2 is embodiment of the present invention test working voltage of electronic tag method.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and, with reference to accompanying drawing, the present invention is described in more detail.Although this paper can provide the demonstration of the parameter that comprises particular value, should be appreciated that, parameter is without definitely equaling corresponding value, but can in acceptable error margin or design constraint, be similar to described value.
In one exemplary embodiment of the present invention, provide a kind of working voltage of electronic tag test macro.The structural representation that Fig. 1 is embodiment of the present invention working voltage of electronic tag test macro.As shown in Figure 1, this system comprises: standard test environment 1, signal source emitting antenna 2, signal source emitting antenna support 3, spectrum analyzer receiving antenna 4, protective cover 5, rotating disk 6, electronic tag to be measured 7, brace table 8, drive motor 9, drive motor controller 10, control computing machine 11, signal source 12, spectrum analyzer 13.
As shown in Figure 1, signal source emitting antenna 2, signal source emitting antenna support 3, spectrum analyzer receiving antenna 4, protective cover 5, rotating disk 6, electronic tag 7 to be measured, brace table 8, drive motor 9 is placed in the inside of standard test environment 1, drive motor controller 10, control computing machine 11, signal source 12, spectrum analyzer 13 is placed in the outside of standard test environment 1, signal source emitting antenna 2 is placed on signal source emitting antenna support 3, spectrum analyzer receiving antenna 4 is placed on protective cover 5, electronic tag 7 to be measured is installed on rotating disk 6 by the label draw-in groove, spectrum analyzer receiving antenna 4 is positioned on the connecting line at main lobe axle center of the main lobe axle center of signal source emitting antenna 2 and electronic tag to be measured 7 built-in aerials.Rotating disk 6 is fixed on drive motor 9, and protective cover 5 is enclosed within rotating disk 6 and electronic tag to be measured 7 outsides, and protective cover 5 and drive motor 9 all are placed on brace table 8.Described signal source emitting antenna support and rotating disk adopt low conductivity and specific inductive capacity to be less than 1.5 material and make.
Be connected by radio frequency feed line respectively between signal source emitting antenna 2 and signal source 12, spectrum analyzer receiving antenna 4 and spectrum analyzer 13, control computing machine 11 and be connected respectively with signal source 12, spectrum analyzer 13 and drive motor controller 10 by data line.
In test process, control computing machine 11 and make the speed motion of electronic tag 7 to be measured to set to drive motor controller 10 transmission rotating speed steering orders; Control computing machine 11 to signal source 12 sending controling instructions, make signal source emitting antenna 2 output powers and the controlled read write line of frequency read the electronic tag signal; Spectrum analyzer 13 is the communication process with electronic tag 7 to be measured by spectrum analyzer receiving antenna 4 monitor signal source emitting antennas 2, catches the electromagnetic signal of corresponding described communication process, and in the electromagnetic signal captured, label signal and label signal are read in demodulation; If find the electronic tag signal of correct demodulation read label signal and label signal to controlling computing machine 11 end records after sending demodulation, control computing machine 11 again sending controling instruction to signal source 12, signal source 12 emissive powers are turned down a unit of adjustment, continue to catch the electromagnetic signal of described communication process, until can not correctly demodulate label signal, start test next time after statistics after adjustment emissive power and frequency.If tag motion speed is adjusted, controlling setting movement velocity once test on starting on computing machine 11.
In one embodiment of the invention, standard test environment 1 is based upon long 6 meters, wide 3 meters, in high 3 meters fully anechoic chambers, signal source 12, spectrum analyzer 13, control computing machine 11, drive motor controller 10 are placed in outside fully anechoic chamber, the radio frequency interface of these instruments is connected with the equipment in darkroom by the optical fiber waveguides in conjunction be positioned on the fully anechoic chamber wall with power interface, and the electromagnetic radiation that the equipment interface outside darkroom sends so can not cause change to the electromagnetic environment in fully anechoic chamber.
Signal source emitting antenna support 3 height are 2 meters, by polystyrene material, made, wrap up in absorbing material outward, the standard gain antenna that support top fixed gain is 10dBi is as signal source emitting antenna 2, and signal source emitting antenna 2 is all identical in the antenna gain index of each frequency.The double-dipole antenna that the fixed gain of usining is 2.3dBi is as spectrum analyzer receiving antenna 4, and the distance between spectrum analyzer receiving antenna 4 and signal source emitting antenna 2 is 0.7 meter.Signal source 12 is selected to read the vector signal generator of electronic tag signal with predeterminated frequency and default power stage simulation rfid interrogator, and its frequency range is 0～3GHz, and the minimum step frequency is 1Hz, and minimum step power is 0.02dBm, spectrum analyzer receiving antenna 4 is near reading the label window, spectrum analyzer 13 is selected the real-time spectrum analyzer that can carry out frequency domain triggering display radio signal transient waveform, control the PC that computing machine 11 is selected with LAN interface, with real-time spectrum analyzer 13 and signal source 12, by the 1000Mbps Ethernet switch, be connected, the ICP/IP protocol transmission mode of use based on vxi bus completes exchanges data, drive motor 9 adopts AC servo, velocity accuracy is the per mille of rotating speed, maximum speed is 2000 rev/mins, the shell of drive motor 9 has been wrapped up in absorbing material.
As shown in Figure 2, the process flow diagram that Fig. 2 is embodiment of the present invention test working voltage of electronic tag method.As shown in Figure 2, the present embodiment comprises the following steps:
Step S202: device initialize, set up respectively the communication connection between control computing machine 11 and signal source 12, drive motor controller 10, spectrum analyzer 13, set the parameters of signal source 12 and spectrum analyzer 13, make signal source 12 and drive motor controller 10 enter readiness for operation, spectrum analyzer 13 enters the frequency domain template trigger mode standby condition of spectrum analyzer, and catching number of communications is 0;
Wherein, the communication connection of set up controlling respectively between computing machine and signal source, drive motor controller, spectrum analyzer realizes by Ethernet, serial ports or gpib bus, make to control computing machine can sending and receiving from steering order and the Query Result of signal source, drive motor controller, spectrum analyzer.In the frequency domain template of controlling computer terminal and set spectrum analyzer, triggering is within a very short cycle in sampling time, triggers corresponding equipment operating instruction while occurring meeting the signal of the frequency set and power condition in frequency domain.
Step S204: be [10km/h controlling the scope of setting label 7 movement velocitys to be measured on computing machine 11,160km/h], electronic tag 7 movement velocity V=100km/h to be measured, control computing machine 11 and send instruction to drive motor controller 10, electronic tag 7 to be measured is moved with rotating disk 6 with setting speed V=100km/h, V=2 π Rn/60, R is the label position to the center of turntable position must distance, the rotating speed that n is the drive motor per minute, wherein drive motor adopts AC servo, velocity accuracy is the per mille of rotating speed, and maximum speed is 2000 rev/mins;
Step S206: the emissive power by control computing machine 11 setting signal sources 12 is PSG=20dBm, it is fc=920MHz that the simulation read write line of signal source 12 emissions is read the electronic tag signal frequency, its scope is 840～845MHz and 920～925MHz, opening signal source 12 emission ports;
Step S208: the electromagnetic signal of the communication process of spectrum analyzer 13 lock-on signal source emitting antennas 2 and electronic tag 7 to be measured, in the electromagnetic signal captured, label signal and label signal are read in demodulation, catch number of communications and add 1;
Step S210: judgement is caught number of communications and whether is less than 100, if enter step S212, otherwise enters step S222;
Step S212: if find the electronic tag signal of correct demodulation enter step S214, otherwise enter step S208;
Step S214: send and to read label signal and label signal to controlling computing machine 11 end records after demodulation, turn down signal source 12 emissive powers, for example unit of adjustment of signal source emissive power is 1dBm;
Step S216: enter step S218 if discovery signals source 12 emissive powers have been kept to 0, otherwise enter step S208;
Step S218: if the transmission frequency of signal source 12 changes, enter step S206, otherwise enter step S220;
Step S220: if the movement velocity of electronic tag to be measured 7 changes, enter step S204, otherwise enter step S222;
Step S222: control computing machine 11 statistical study record data, operating voltage using operating voltage now as electronic tag, disconnect the communication connection between control computing machine 11 and signal source 12, drive motor controller 10, spectrum analyzer 13, close all testing apparatuss, test finishes.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a method of utilizing test macro to carry out the working voltage of electronic tag test, is characterized in that,
Described test macro comprises: rotating disk, protective cover, drive motor, drive motor controller, brace table, signal source, signal source emitting antenna, signal source emitting antenna support, spectrum analyzer receiving antenna, spectrum analyzer and control computing machine, wherein:
Electronic tag to be measured is arranged at the edge of described rotating disk; Described rotating disk is mounted on the rotational plane of described drive motor; Shielding cover is in rotating disk and electronic tag to be measured outside, and directly over protective cover, there is a rectangular opening centre; Protective cover and drive motor are placed in brace table; The signal source emitting antenna is placed on signal source emitting antenna support; The spectrum analyzer receiving antenna is placed on protective cover, and spectrum analyzer receiving antenna and described oblong openings all are positioned on the connecting line at main lobe axle center of the main lobe axle center of signal source emitting antenna and electronic tag built-in aerial to be measured;
Described control computing machine is connected respectively with signal source, spectrum analyzer and drive motor controller by data line, between signal source emitting antenna and signal source, spectrum analyzer receiving antenna and spectrum analyzer, by radio frequency feed line, is connected respectively; Drive motor controller is connected with described drive motor; Control computing machine and send the rotating speed steering order to drive motor controller, make described drive motor drive rotating disk with described rotational speed, thereby described electronic tag to be measured rotates thereupon; Control computing machine to the signal source sending controling instruction, make the controlled read write line of signal source emitting antenna output power and frequency read the electronic tag signal; Spectrum analyzer is by the communication process of spectrum analyzer receiving antenna monitor signal source emitting antenna and electronic tag to be measured;
Described method comprises:
Steps A: control computing machine and send instruction to drive motor controller, electronic tag is moved with rotating disk with setting speed V, V=2 π Rn/60, R is the label position to the center of turntable position must distance, the rotating speed that n is the drive motor per minute, set the initial communication number of times;
Step B: by controlling the emissive power of computer settings signal source, the simulation read write line of signal source emission is read the electronic tag signal frequency;
Step C: the electromagnetic signal of the communication process of spectrum analyzer lock-on signal source emitting antenna and electronic tag to be measured, in the electromagnetic signal captured, label signal and label signal are read in demodulation, and number of communications adds 1;
Step D: whether number of communications is less than predetermined threshold value, if so, and execution step E, otherwise, execution step H;
Step e: judge whether correctly to demodulate the electronic tag signal, if so, execution step F, otherwise, execution step H;
Step F, spectrum analyzer sends reads label signal and label signal to controlling the computer terminal record after demodulation, turns down the signal source emissive power;
Step G, judge now whether the signal source emissive power is zero, if non-vanishing, execution step C; If now the signal source emissive power is zero, whether the signal source frequency of operation of judgement record changes, if the signal source frequency of operation of record changes, re-executes step B; If now the signal source emissive power is zero, and the signal source frequency of operation of record do not change, and judges whether the movement velocity of electronic tag to be measured changes, if when the movement velocity of electronic tag to be measured changes, re-executes steps A; Otherwise, execution step H;
Step H, the operating voltage using described control computing machine voltage now as described electronic tag.
2. working voltage of electronic tag method of testing according to claim 1, is characterized in that, before described steps A, also comprises:
Steps A ', set up respectively the communication connection between control computing machine and signal source, drive motor controller, spectrum analyzer, make signal source and drive motor controller enter readiness for operation, spectrum analyzer enters the frequency domain template trigger mode standby condition of spectrum analyzer.
3. working voltage of electronic tag method of testing according to claim 1, is characterized in that, in described test macro:
Described drive motor controller, control computing machine, signal source, spectrum analyzer are placed in the outside of fully anechoic chamber;
Described signal source emitting antenna, signal source emitting antenna support, spectrum analyzer receiving antenna, protective cover, rotating disk, electronic tag to be measured, brace table, drive motor are placed in the inside of fully anechoic chamber.
4. working voltage of electronic tag method of testing according to claim 1, is characterized in that, in described test macro:
Described signal source emitting antenna support and rotating disk adopt specific inductive capacity to be less than 1.5 material and make;
There is the firmware that electronic tag is installed at the edge of rotating disk, and the material of this firmware is consistent with the material of described rotating disk.
5. working voltage of electronic tag method of testing according to claim 1, is characterized in that, in described test macro:
The spectrum analyzer receiving antenna is that gain is the above double-dipole antenna of 2dBi;
Described signal source emitting antenna is that gain is the above standard gain antenna of 10dBi, and in the calibration tape wide region, the gain of signal source emitting antenna remains unchanged.
6. working voltage of electronic tag method of testing according to claim 1, it is characterized in that, in described test macro: described signal source is to read with predeterminated frequency and default power stage rfid interrogator the instrument of electronic tag signal, and this predeterminated frequency and default power are by controlling the computer remote adjustment.
7. working voltage of electronic tag method of testing according to claim 1, is characterized in that, in described test macro:
Protective cover is that the steel plate that has pasted absorbing material by outside is made;
The shell of described drive motor is metal material, and one deck absorbing material has been pasted in the outside of shell.
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| JPH10285252A (en) * | 1997-02-10 | 1998-10-23 | Advantest Corp | Method for testing and measuring communication equipment and its device |
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