CN112149436A - Portable RFID field tester - Google Patents
Portable RFID field tester Download PDFInfo
- Publication number
- CN112149436A CN112149436A CN202011158234.0A CN202011158234A CN112149436A CN 112149436 A CN112149436 A CN 112149436A CN 202011158234 A CN202011158234 A CN 202011158234A CN 112149436 A CN112149436 A CN 112149436A
- Authority
- CN
- China
- Prior art keywords
- tag
- reader
- signal
- frequency
- rfid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 32
- 238000004458 analytical method Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 27
- 230000006854 communication Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 23
- 230000011664 signaling Effects 0.000 claims description 21
- 238000011156 evaluation Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 238000010183 spectrum analysis Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0095—Testing the sensing arrangement, e.g. testing if a magnetic card reader, bar code reader, RFID interrogator or smart card reader functions properly
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0722—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips comprising an arrangement for testing the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The application discloses a portable RFID field tester, which comprises a control terminal, a reader and an antenna; the control terminal is a computer or an embedded mainboard containing application software and controls the work among all the components of the tester; the reader is a device for reading label information and comprises a control unit and a radio frequency module; the radio frequency module comprises a transmitter and a receiver, the transmitter is used for sending a radio signal to the tag, and the receiver is used for receiving the radio signal of the tag; the antenna is a transmitting and receiving device for transmitting data between the tag and the reader; the control terminal controls the reader to send electromagnetic waves through the antenna, after the tag enters the electromagnetic wave magnetic field, a coil in the tag can generate induction current, and the tag starts to work and receives radio frequency signals sent by the reader; if the tag is an active tag, a radio frequency signal with a certain frequency is actively sent, and the reader acquires the signal through the antenna, decodes the signal and sends the decoded signal to a control unit of the reader for relevant data processing.
Description
Technical Field
The invention belongs to the technical field of electronic measurement, and relates to a portable RFID (radio frequency identification) field tester.
Background
In the radio communication technology, the RFID technology, that is, the radio frequency identification technology, is a non-visual, non-mechanical or optical contact two-way communication automatic identification technology, and has the advantages of high sensitivity, high speed, strong anti-interference capability, abundant information, encryption capability, long service life, and the like, so that the application in the aspects of tag identification, reader, testing and performance evaluation of RFID products, and the like is quite wide.
The research of the RFID technology is significant, and the RFID technology is similar to the working mechanism of a radar, and the radar determines the characteristics of the position, the shape, the state and the like of an object by processing radio waves or microwaves reflected by the object, and the like. Early in the second world war, the military began to use, developed rapidly since the nineties of the twentieth century, and various RFID products were crowded up to now. Today, the quality requirements of RFID products are more strict due to the rapid development of the RFID industry, and therefore, RFID detectors for detecting the performance of RFID products are in operation. However, the RFID detection has many difficulties, such as many standards, high performance requirements, and inconvenience of a heavy large detection system device. Therefore, the design and implementation of portable RFID detectors become necessary, and the design of related RFID tags and readers also becomes diversified.
Disclosure of Invention
In order to overcome the defects in the prior art, the portable RFID field tester can transmit, collect and record RFID standard radio frequency signals of ultrahigh frequency and microwave frequency bands, and analyze radio frequency parameters, protocol parameters and signaling data of the tested signals according to relevant autonomous standards. The method has the characteristics of ingenious design, convenience in operation and high measurement accuracy, and has a good application prospect.
In order to achieve the above objective, the following technical solutions are adopted in the present application:
a portable RFID field tester is used in cooperation with an RFID tag, the tag is an identification object of the RFID field tester, consists of a coupling element and a radio frequency chip, stores user information, and is installed on the surface of an identified object, and the tester comprises a control terminal, a reader and an antenna;
the control terminal is a computer or an embedded mainboard containing application software and controls the work among all the components of the tester;
the reader is a device for reading label information and comprises a control unit and a radio frequency module; the radio frequency module comprises a transmitter and a receiver, the transmitter is used for sending a radio signal to the tag, and the receiver is used for receiving the radio signal of the tag;
the antenna is a transmitting and receiving device for transmitting data between the tag and the reader;
the control terminal controls the reader to send electromagnetic waves through the antenna, after the tag enters the electromagnetic wave magnetic field, a coil in the tag generates induction current, and the tag starts to work and receives radio frequency signals sent by the reader; if the tag is a passive tag, the product information stored in the chip is sent out; if the active tag is an active tag, a radio frequency signal with a certain frequency is actively sent, the reader acquires the signal through the antenna, decodes the signal, sends the decoded signal to a control unit of the reader for related data processing, and finally feeds the decoded signal back to the control terminal to realize data interaction.
The invention further comprises the following preferred embodiments:
preferably, the control terminal of the tester and the control unit of the reader are integrated on a mainboard which takes a programmable embedded dual-core processor as a central chip, and the periphery of the programmable embedded dual-core processor is connected with a power management module, a key function module, a capacitance touch module, an asynchronous transceiver module and a radio frequency unit of the reader; the radio frequency unit is an RF agile transceiver;
the key function module and the capacitance touch module are used for realizing data interaction with a user;
the asynchronous transceiver is used for realizing the communication interface function of the detector;
the power supply management module is used for realizing external and internal power supply mode conversion.
Preferably, the tester is used for signal monitoring and performance evaluation of readers and tags in the RFID deployment process;
the signal monitoring in the RFID deployment process comprises the steps of detecting the RFID deployment environment, analyzing RFID radio frequency communication signaling and evaluating the performance based on a reference label;
the performance evaluation of the reader and the tag is divided into tag conformance detection and reader conformance detection.
Preferably, the operation process of detecting the RFID deployment environment is as follows: in the RFID deployment process, a portable RFID field tester and an antenna thereof are placed in an RFID deployment environment, and the tester is used for recording the signal intensity of each channel; and displaying the latest frequency spectrum scanning data in real time in the real-time frequency spectrum analysis bandwidth according to the set frequency, so as to realize the evaluation of the field environment.
Preferably, the RFID radio frequency communication signaling analysis operation process is: under the condition that the RFID to be tested is in a working state, the portable RFID field tester and the antenna thereof are placed in the working range of the RFID to be tested, the tester is used for analyzing the communication condition of the reader and the tag, the signaling and the time sequence parameter in the working process are recorded, and the function of analyzing the RFID radio frequency communication signaling is realized by analyzing the signaling and the time sequence parameter.
Preferably, the performance evaluation operation process based on the reference label is as follows: under the condition that the RFID to be tested is not in a working state, a portable RFID field tester and matched equipment are placed within the working range of the RFID to be tested, wherein the matched equipment comprises a detection antenna and a reference label suite;
the method comprises the steps that a reference tag is communicated with a reader to be tested, a tester is used for collecting radio frequency signals of a product to be tested to analyze a time domain and a frequency domain, and main parameters of radio frequency performance are obtained, wherein the main parameters comprise working frequency, in-band power, reading distance and writing distance;
when the tested RFID is in an abnormal working state, the reference label can be used for replacing a failed product with reduced radio frequency performance parameters for verification, and system faults can be positioned and diagnosed in an auxiliary mode.
Preferably, the first and second electrodes are formed of a metal,
the label conformity detection process comprises the following steps:
the returned response signal is collected and analyzed by sending an instruction signal to the detected tag;
carrying out modulation depth, pulse width, under modulation or over modulation and frequency domain analysis on the returned response signals;
the modulation depth refers to the ratio of the amplitude of the modulated wave to the amplitude of the carrier wave;
the pulse width is the period for which the pulse can reach the amplitude value;
the under-modulation refers to the ratio of the time that the peak value of the modulation signal is lower than the normal modulation amplitude value to the pulse width time;
the overmodulation refers to the ratio of the time for which certain peaks of the modulation signal exceed the normal modulation amplitude to the pulse width;
the frequency domain analysis comprises the analysis of the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the measured signal;
the centre frequency being the theoretical centre frequency of the signal to be measured, using foRepresents;
the frequency drift refers to the condition that the output frequency value of the radio frequency equipment changes in a single direction along with the time when the radio frequency equipment continuously works for a long time, and the frequency drift fΔUsing actual value f of center frequency of measured signalmeaAnd the theoretical center frequency foThe difference of (d) is expressed as:
fΔ＝fmea-fo
the adjacent channel leakage ratio is used for measuring the influence characteristics of the radio frequency equipment on the channels outside the main working frequency when the radio frequency equipment works, and the ratio of the power P (R) of the measured label at the transmitting channel R to the power P (S) of other channels S is expressed as follows:
the reader conformance detection comprises time domain signal analysis and reader detection frequency analysis of signals sent by the reader;
the time domain signal analysis displays the time domain waveform of the measured signal after frequency conversion and various parameters analyzed based on the time domain waveform;
the reader detection frequency analysis comprises the analysis of the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the detected signal.
The beneficial effect that this application reached:
this application has realized integrating, small, portable RFID field tester through the pertinence design to RFID field tester, can carry out capability test to label and reading the ware at the installing point of label, has realized the instant, reliable detection to RFID relevant equipment for the RFID product has obtained better performance, the guarantee of more reliable product, more humanized technical support.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a portable RFID field tester according to the present application;
FIG. 2 is a schematic diagram of a hardware architecture of a portable RFID field tester according to the present application;
fig. 3 is a schematic diagram of a compliance testing software architecture of a portable RFID field tester according to the present application.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
As shown in fig. 1, the portable RFID field tester of the present application is used in cooperation with an RFID tag, where the tag is an identification object of the RFID field tester, is composed of a coupling element and a radio frequency chip, stores user information, and is installed on a surface of an identified object, and the tester includes a control terminal, a reader, and an antenna;
the control terminal is a computer or an embedded mainboard containing application software and controls the work among all the components of the tester;
the reader is a device for reading label information and comprises a control unit and a radio frequency module; the radio frequency module comprises a transmitter and a receiver, the transmitter is used for sending a radio signal to the tag, and the receiver is used for receiving the radio signal of the tag;
the antenna is a transmitting and receiving device for transmitting data between the tag and the reader; in practical application, the system power, the shape and the relative position of the antenna can affect the data transmitting and receiving performance of the reader;
the control terminal controls the reader to send electromagnetic waves through the antenna, after the tag enters the electromagnetic wave magnetic field, a coil in the tag generates induction current, and the tag starts to work and receives radio frequency signals sent by the reader; if the tag is a passive tag, the product information stored in the chip is sent out; if the active tag is an active tag, a radio frequency signal with a certain frequency is actively sent, the reader acquires the signal through the antenna, decodes the signal, sends the decoded signal to a control unit of the reader for related data processing, and finally feeds the decoded signal back to the control terminal to realize data interaction.
As shown in fig. 2, in the embodiment of the present application, a control terminal of the tester and a control unit of the reader are integrated on a motherboard which uses a programmable embedded dual-core processor as a central chip, the programmable embedded dual-core processor selects Xilinx ZYNQ SOC when actually implemented, and a power management module, a key function module, a capacitive touch module, an asynchronous transceiver module, and a radio frequency unit of the reader are connected to the periphery of the programmable embedded dual-core processor; the radio frequency unit is an RF agile transceiver, and the AD9361 is adopted by the RF agile transceiver in actual implementation;
the key function module and the capacitance touch module are used for realizing data interaction with a user;
the asynchronous transceiver is used for realizing the communication interface function of the detector;
the power supply management module is used for realizing external and internal power supply mode conversion.
In specific implementation, the tester is used for signal monitoring and performance evaluation of readers and tags in the RFID deployment process;
the signal monitoring in the RFID deployment process comprises the steps of detecting the RFID deployment environment, analyzing RFID radio frequency communication signaling and evaluating the performance based on a reference label;
as shown in fig. 3, the performance evaluation of the reader and the tag is divided into tag compliance detection and reader compliance detection.
In the embodiment of the present application, the operation process of detecting the deployment environment of the RFID is as follows: in the RFID deployment process, a portable RFID field tester and an antenna thereof are placed in an RFID deployment environment, and the tester is used for recording the signal intensity of each channel; and displaying the latest frequency spectrum scanning data in real time in the real-time frequency spectrum analysis bandwidth according to the set frequency, so as to realize the evaluation of the field environment. In addition, for the signal interference problem in a complex radio frequency environment, a radio frequency communication process signal can be captured, large data can be collected in a long time, and an interference event with unknown duration and occurring at an unknown place in unknown time can be obtained.
In the embodiment of the present application, the operation process of analyzing the RFID radio frequency communication signaling is as follows: under the condition that the RFID to be tested is in a working state, the portable RFID field tester and the antenna thereof are placed in the working range of the RFID to be tested, the tester is used for analyzing the communication condition of the reader and the tag, the signaling and the time sequence parameter in the working process are recorded, and the function of analyzing the RFID radio frequency communication signaling is realized by analyzing the signaling and the time sequence parameter. The signaling analysis function mainly aims at the detection, verification and analysis of the communication signaling of the reader and the label, can analyze the signaling receiving and sending sequence and track and detect, thereby visually observing the time sequence of the communication between the reader and the label and analyzing the signaling points with problems. When the tested RFID is in an abnormal working state, the specific situation of the abnormal phenomenon can be further analyzed, and the reason of the abnormal phenomenon can be traced. Under the configuration of the RFID radio frequency communication signaling mode, the detector works in different detection modes such as reader simulation, label simulation, signal monitoring and the like. The reader mode can actively transmit an instruction signal, simultaneously receive and analyze a tag response signal, and is suitable for electronic tag detection; the tag mode can receive and analyze the instruction signal and simultaneously transmit a response signal, and is suitable for the detection of the conformity and the performance of the reader; the signal monitoring mode can collect, stream the disc in real time and playback the communication signals of the RFID, and is suitable for the integral performance detection and fault diagnosis of the RFID.
In an embodiment of the present application, the performance evaluation operation process based on the reference tag includes: under the condition that the RFID to be tested is not in a working state, a portable RFID field tester and matched equipment are placed within the working range of the RFID to be tested, wherein the matched equipment comprises a detection antenna and a reference label suite;
as shown in fig. 3, the reference tag communicates with the reader to be tested, and the tester collects the radio frequency signal of the product to be tested to perform time domain and frequency domain analysis, so as to obtain the main parameters of the radio frequency performance, wherein the main parameters include the working frequency, the in-band power, the reading distance and the writing distance;
when the tested RFID is in an abnormal working state, the reference label can be used for replacing a failed product with reduced radio frequency performance parameters for verification, and system faults can be positioned and diagnosed in an auxiliary mode.
In an embodiment of the present application, the tag conformance detection process is: the returned response signal is collected and analyzed by sending an instruction signal to the detected tag;
the method comprises the steps of modulating depth, pulse width, under modulation or over modulation and frequency domain analysis on a returned response signal;
the modulation depth refers to the ratio of the amplitude of the modulated wave to the amplitude of the carrier wave, as a percentage RmdRepresents;
if the modulation function p (t) of the known signal is:
p(t)＝(A+m(t))×cos 2πft
in the formula: a is the carrier amplitude; m (t) is a function of the modulated waveform; f is the frequency; t is time.
Then the depth R is modulatedmdCan be expressed as:
in the formula: peak (m) is the peak of the modulated waveform function;
modulation depth RmdIt can also be expressed by the amplitude relationship of the modulated wave to the carrier:
in the formula: m ismaxIs the maximum amplitude of the modulated wave; m isminIs the minimum amplitude of the modulated wave; p is a radical ofmaxIs the maximum amplitude of the carrier; p is a radical ofminIs the minimum amplitude of the carrier;
the pulse width represents the period for which the pulse can reach an amplitude, denoted T, i.e.:
T＝tum+tom+tam
in the formula: t is tumAn under-modulation time; t is tomOvermodulation time; t is tamTime of normal modulation amplitude;
the under modulation refers to the time t when the peak value of the modulation signal is lower than the normal modulation amplitudeumRatio to pulse width time T, time T of normal modulation amplitudeumThe ratio to the pulse width time T is expressed as:
the time t when some peak value of the overmodulation modulation signal exceeds the normal modulation amplitudeomRatio to pulse width T, time T of normal modulation amplitudeomThe ratio to the pulse width T is expressed as:
the frequency domain analysis comprises the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the detected signal;
the centre frequency being the theoretical centre frequency, using foRepresents;
the frequency drift refers to the situation that the output frequency value of the radio frequency equipment changes unidirectionally along with the time when the radio frequency equipment continuously works for a long time. Frequency drift fΔUsing actual value f of center frequency of measured signalmeaAnd the theoretical center frequency foThe difference of (d) is expressed as:
fΔ＝fmea-fo
the adjacent channel leakage ratio is used for measuring the influence characteristics of the radio frequency equipment on the channels outside the main working frequency when the radio frequency equipment works, and the ratio of the power P (R) of the measured label at the transmitting channel R to the power P (S) of other channels S is expressed as follows:
the software designs a communication data module which comprises decoding data and displaying the decoding and identification results of the radio frequency signals. The method can analyze the relative measurement value, the code, the lead code check, the cyclic redundancy check and the like of the reverse link frequency of the detected signal, and realize the conformity detection of each index of the radio frequency identification label.
In specific implementation, the reader conformance detection operation process is as follows: collecting and analyzing signals sent by a reader, and setting central frequency, collecting time, sampling rate and bandwidth parameters to carry out detection;
the reader conformance detection comprises time domain signal analysis and reader detection frequency analysis of signals sent by the reader;
the time domain signal analysis displays the time domain waveform of the signal after frequency conversion and various parameters analyzed based on the time domain waveform;
the reader detection frequency analysis is similar to the label conformity test analysis content, and also comprises the analysis of the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the detected signal.
The communication data module for the reader conformance detection comprises decoding data, preamble code check and CRC check, and analyzes the measurement of the measurement value related to the coding mode and the reference time T _ c.
By monitoring signals in the ultrahigh frequency and microwave frequency band RFID deployment process and evaluating the performance of the reader and the tag, the deployment of the system can be effectively optimized, the problems of how many antennas are arranged, how to determine the optimal position of each antenna, the optimal labeling position of each article and the like are solved, and the optimization of the RFID deployment process is realized.
Abbreviation:
RFID, Radio Frequency Identification, RFID for short;
MD, Modulation Depth, also called Modulation degree, MD for short;
PW, Pulse Width, PW for short;
UM, Under Modulation, also called Under-dash, abbreviated as UM;
OM, Over Modulation, also called overshoot, abbreviated as OM;
ACLR, adjacentchannel Leakage Ratio, ACLR for short;
CRC, Cyclic Redundancy Check, CRC for short.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (8)
1. A portable RFID field tester, the tester is used in cooperation with an RFID tag, the tag is an identification object of the RFID field tester, is composed of a coupling element and a radio frequency chip, stores user information, and is installed on the surface of an identified object, and the portable RFID field tester is characterized in that:
the tester comprises a control terminal, a reader and an antenna;
the control terminal controls the work among all the components of the tester;
the reader is a device for reading label information and comprises a control unit and a radio frequency module; the radio frequency module comprises a transmitter and a receiver, the transmitter is used for sending a radio signal to the tag, and the receiver is used for receiving the radio signal of the tag;
the antenna is a transmitting and receiving device for transmitting data between the tag and the reader;
the control terminal controls the reader to send electromagnetic waves through the antenna, after the tag enters the electromagnetic wave magnetic field, a coil in the tag generates induction current, and the tag starts to work and receives radio frequency signals sent by the reader; when the tag is a passive tag, the product information stored in the chip is sent out; when the active tag is an active tag, a radio frequency signal with a certain frequency is actively sent, the reader acquires the signal through the antenna, decodes the signal, sends the decoded signal to a control unit of the reader for related data processing, and finally feeds the decoded signal back to the control terminal to realize data interaction.
2. The portable RFID field tester of claim 1, wherein:
the control terminal of the tester and the control unit of the reader are integrated on a mainboard which takes a programmable embedded dual-core processor as a central chip, and the periphery of the programmable embedded dual-core processor is connected with a power supply management module, a key function module, a capacitance touch module, an asynchronous transceiver module and a radio frequency unit of the reader; the radio frequency unit is an RF agile transceiver;
the key function module and the capacitance touch module are used for realizing data interaction with a user;
the asynchronous transceiver is used for realizing the communication interface function of the detector;
the power supply management module is used for realizing external and internal power supply mode conversion.
3. The portable RFID field tester of claim 1, wherein:
the tester is used for signal monitoring and performance evaluation of the reader and the tag in the RFID deployment process;
the signal monitoring in the RFID deployment process comprises the steps of detecting the RFID deployment environment, analyzing RFID radio frequency communication signaling and evaluating the performance based on a reference label;
the performance evaluation of the reader and the tag is divided into tag conformance detection and reader conformance detection.
4. A portable RFID field tester as defined in claim 3 wherein:
the detection operation process of the RFID deployment environment comprises the following steps:
in the RFID deployment process, a portable RFID field tester and an antenna thereof are placed in an RFID deployment environment, and the tester is used for recording the signal intensity of each channel; and displaying the latest frequency spectrum scanning data in real time in the real-time frequency spectrum analysis bandwidth according to the set frequency, so as to realize the evaluation of the field environment.
5. A portable RFID field tester as defined in claim 3 wherein:
the RFID radio frequency communication signaling analysis and operation process comprises the following steps:
under the condition that the RFID to be tested is in a working state, the portable RFID field tester and the antenna thereof are placed in the working range of the RFID to be tested, the tester is used for analyzing the communication condition of the reader and the tag, the signaling and the time sequence parameter in the working process are recorded, and the function of analyzing the RFID radio frequency communication signaling is realized by analyzing the signaling and the time sequence parameter.
6. A portable RFID field tester as defined in claim 3 wherein:
the performance evaluation operation process based on the reference label comprises the following steps:
under the condition that the RFID to be tested is not in a working state, a portable RFID field tester and matched equipment are placed within the working range of the RFID to be tested, wherein the matched equipment comprises a detection antenna and a reference label suite;
the method comprises the steps that a reference tag is communicated with a reader to be tested, a tester is used for collecting radio frequency signals of a product to be tested to analyze a time domain and a frequency domain, and main parameters of radio frequency performance are obtained, wherein the main parameters comprise working frequency, in-band power, reading distance and writing distance;
when the tested RFID is in an abnormal working state, the reference tag is adopted to replace a failed product with reduced radio frequency performance parameters for verification, and system faults are positioned and diagnosed in an auxiliary mode.
7. A portable RFID field tester as defined in claim 3 wherein:
the label conformity detection process comprises the following steps:
the returned response signal is collected and analyzed by sending an instruction signal to the detected tag;
carrying out modulation depth, pulse width, under modulation or over modulation and frequency domain analysis on the returned response signals;
the modulation depth refers to the ratio of the amplitude of the modulated wave to the amplitude of the carrier wave;
the pulse width is the period for which the pulse can reach the amplitude value;
the under-modulation refers to the ratio of the time that the peak value of the modulation signal is lower than the normal modulation amplitude value to the pulse width time;
the overmodulation refers to the ratio of the time for which certain peaks of the modulation signal exceed the normal modulation amplitude to the pulse width;
the frequency domain analysis comprises the analysis of the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the measured signal;
the centre frequency being the theoretical centre frequency of the signal to be measured, using foRepresents;
the frequency drift refers to the condition that the output frequency value of the radio frequency equipment changes in a single direction along with the time when the radio frequency equipment continuously works for a long time, and the frequency drift fΔUsing actual value f of center frequency of measured signalmeaAnd the theoretical center frequency foThe difference of (d) is expressed as:
fΔ＝fmea-fo
the adjacent channel leakage ratio is used for measuring the influence characteristics of the radio frequency equipment on the channels outside the main working frequency when the radio frequency equipment works, and the ratio of the power P (R) of the measured label at the transmitting channel R to the power P (S) of other channels S is expressed as follows:
8. a portable RFID field tester as defined in claim 3 wherein:
the reader conformance detection comprises time domain signal analysis and reader detection frequency analysis of signals sent by the reader;
the time domain signal analysis displays the time domain waveform of the measured signal after frequency conversion and various parameters analyzed based on the time domain waveform;
the reader detection frequency analysis comprises the analysis of the center frequency, the frequency drift, the adjacent channel leakage ratio and the phase of the detected signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158234.0A CN112149436A (en) | 2020-10-26 | 2020-10-26 | Portable RFID field tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011158234.0A CN112149436A (en) | 2020-10-26 | 2020-10-26 | Portable RFID field tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112149436A true CN112149436A (en) | 2020-12-29 |
Family
ID=73955021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011158234.0A Pending CN112149436A (en) | 2020-10-26 | 2020-10-26 | Portable RFID field tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112149436A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295082A (en) * | 2021-05-20 | 2021-08-24 | 浙江波誓盾科技有限公司 | Crack detection method, crack detection system, computer device and readable storage medium |
| CN113326909A (en) * | 2021-05-14 | 2021-08-31 | 西京学院 | RFID dynamic monitoring system and time error, difference frequency and cross test measuring method |
| CN117910486A (en) * | 2024-03-20 | 2024-04-19 | 深圳市捷通科技有限公司 | Communication control method, system and storage medium based on RFID |
| CN117910486B (en) * | 2024-03-20 | 2024-06-04 | 深圳市捷通科技有限公司 | Communication control method, system and storage medium based on RFID |
-
2020
- 2020-10-26 CN CN202011158234.0A patent/CN112149436A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113326909A (en) * | 2021-05-14 | 2021-08-31 | 西京学院 | RFID dynamic monitoring system and time error, difference frequency and cross test measuring method |
| CN113295082A (en) * | 2021-05-20 | 2021-08-24 | 浙江波誓盾科技有限公司 | Crack detection method, crack detection system, computer device and readable storage medium |
| CN117910486A (en) * | 2024-03-20 | 2024-04-19 | 深圳市捷通科技有限公司 | Communication control method, system and storage medium based on RFID |
| CN117910486B (en) * | 2024-03-20 | 2024-06-04 | 深圳市捷通科技有限公司 | Communication control method, system and storage medium based on RFID |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1261954B1 (en) | A tag evaluation module for radio frequency identification (rfid) systems | |
| CN203911933U (en) | ETC roadside unit having radio frequency self-test function | |
| AU2001237177A1 (en) | A tag evaluation module for radio frequency identification (RFID) systems | |
| CN112149436A (en) | Portable RFID field tester | |
| US9792470B2 (en) | Interference detection and mitigation in RFID readers and systems | |
| CN102539970A (en) | RFID (radio frequency identification) equipment testing method and system | |
| CN105022020A (en) | RF electromagnetic field and radio immunity test system and method of electric energy meter | |
| CN102298685B (en) | Automotive electronic radio-frequency identification parameter detecting system based on virtual instrument | |
| CN203490332U (en) | Multifunctional hand-held smart partial discharge detection device | |
| CN101162505A (en) | Methods and apparatus for analyzing signal conditions affecting operation of an rfid communication device | |
| CN104090252A (en) | Comprehensive detecting system and method for cable type fault indicator | |
| CN111769890B (en) | Transponder production detecting system | |
| CN110824215A (en) | Broadband carrier based electricity stealing behavior detection method and device | |
| CN213122996U (en) | Portable RFID field tester | |
| CN101170324B (en) | Testing system and testing method of near-field communication device | |
| CN110068750A (en) | GIS partial discharge superfrequency method based on wireless network monitors system | |
| CN201654821U (en) | Radio frequency identification electronic tag simulator | |
| CN101520492A (en) | Method for testing near field communication equipment by near field test system | |
| CN108680843A (en) | A kind of method for detection of partial discharge of switch cabinet based on Radio Transmission Technology | |
| CN103033683A (en) | Passive radio frequency identification devices (RFID) electronic tag resonant frequency detection system based on Chirp signal and passive RFID electronic tag resonant frequency detection method based on the Chirp signal | |
| CN107907847A (en) | The self-test and self-calibration system and method for high-frequency local discharging on-line checking based on frequency mixing technique | |
| CN111169505A (en) | Railway detection system based on RFID | |
| CN215682301U (en) | NAVTEX system broadcasting efficiency detection platform based on frequency domain difference | |
| CN101093535A (en) | Method for testing whether there is responsion from passive UHF label or not | |
| CN101964042B (en) | Rfid reader and method for identifying rfid tag thereof and apparatus for analyzing reception power pattern |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |