CN108304743B - Test system and method for quantitatively evaluating protocol consistency of RFID (radio frequency identification) label - Google Patents
Test system and method for quantitatively evaluating protocol consistency of RFID (radio frequency identification) label Download PDFInfo
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- CN108304743B CN108304743B CN201810076771.7A CN201810076771A CN108304743B CN 108304743 B CN108304743 B CN 108304743B CN 201810076771 A CN201810076771 A CN 201810076771A CN 108304743 B CN108304743 B CN 108304743B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
Abstract
The invention relates to a test system and a method for quantitatively evaluating the protocol consistency of an RFID (radio frequency identification) tag, which comprises an RFID reader, a tag, an antenna and an upper computer module based on an MFC (micro-functional circuit), wherein the RFID reader is connected with the tag; an RFID reader: sending an instruction to realize information reading and writing operations on the tag; the tag is used for receiving a signal sent by the RFID reader, modulating the signal and reflecting the modulated signal back; the antenna comprises a transmitting antenna and a monitoring antenna, the transmitting antenna is used for emitting the command sent by the RFID reader into the air in an electromagnetic wave mode, and the monitoring antenna is used for monitoring the communication process of the RFID reader and the tag and transmitting the received signal to the upper computer module in an electric connection mode; and detecting the support degree of the label on the RFID protocol, thereby giving quantitative and accurate evaluation to the label in the RFID system and providing technical support and guidance for RFID testers and manufacturers.
Description
Technical Field
The invention relates to a test system and a method for quantitatively evaluating the protocol consistency of an RFID (radio frequency identification) label, belonging to the technical field of radio frequency identification.
Background
RFID is an abbreviation of Radio Frequency Identification, Radio Frequency Identification. The RFID is a non-contact automatic identification technology, automatically identifies a target object and acquires related data through a radio frequency identification signal, can quickly track articles and exchange data, does not need manual intervention in identification work, and can work in various severe environments. With the continuous improvement and maturity of RFID technology, it has been applied to the fields of charging systems, public transportation, medicine, retail, logistics, and the like in many countries around the world.
However, at present, many domestic and foreign RFID researches mainly focus on the research of the RFID key technology and the popularization of the commercial application of the RFID, and the research on the RFID test technology is neglected. By testing the RFID system and the application environment before actual application, reference basis can be provided for implementing the RFID technology, the difficulty of the RFID in enterprise deployment and application is reduced, and the development of the RFID technology is powerfully promoted.
A typical RFID system includes tags, a reader and application software, wherein the quality of the tags has a large impact on the system performance, and the high-quality tag performance is the basis for the normal operation of the RFID system. Therefore, there is a need to provide an RFID tag testing system to detect the degree of support of the tag for the RFID protocol, so as to give quantitative and accurate evaluation to the tag in the RFID system.
Chinese patent document CN103487676A discloses a method and a device for testing the performance of an RFID electronic tag, wherein the detection method comprises the following steps: a. transmitting an activation signal to the electronic tag at a test distance S, receiving a response signal fed back by the electronic tag, and acquiring judgment data of the performance of the electronic tag; b. comparing the discrimination data with preset reference data for determining the performance of the electronic tag; c. determining the performance of the electronic tag according to the comparison result of the discrimination data and the preset data; however, the patent only focuses on the activation energy of the tag, omits the read and write function tests commonly used by the tag, and has relatively single test content. Moreover, the method only performs functional test on the label, belongs to qualitative test, does not perform quantitative and accurate performance test, and cannot effectively guide electronic label manufacturers and scientific research institutions.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a test system for quantitatively evaluating the protocol consistency of an RFID label, which automatically detects the support degree of the label on the RFID protocol, thereby ensuring that the label meets the requirements of specification and application.
The invention also provides a method for quantitatively evaluating the protocol consistency of the RFID label;
the technical scheme of the invention is as follows:
a test system for quantitatively evaluating the protocol consistency of an RFID label comprises an RFID reader, a label, an antenna and an upper computer module based on an MFC (micro-functional circuit), wherein the upper computer module comprises a microprocessor, a memory and a microprocessor;
the RFID reader: sending an instruction, and transmitting radio frequency energy through one or more antennas to realize information reading and data writing operations on the tag; the label is as follows: the RFID tag is a data carrier of a radio frequency identification system and is used for receiving a signal sent by an RFID reader, transmitting information stored in the tag, such as an identity card number, a commodity number and the like, by modulating the signal and reflecting the signal back; the antenna comprises a transmitting antenna and a monitoring antenna, the transmitting antenna is used for emitting the instruction sent by the RFID reader into the air in an electromagnetic wave mode, and the monitoring antenna is used for monitoring the communication process of the RFID reader and the tag and transmitting the received signals of the RFID reader and the tag to the upper computer module in an electric connection mode; the upper computer module: and receiving the signal transmitted by the monitoring antenna, performing corresponding signal processing and testing according to the specific requirements of the user, and feeding back the test result to the user.
According to the optimization of the invention, the upper computer module comprises a user interaction unit, a signal testing unit, a weighting calculation unit, a data storage unit and a data output unit which are connected in sequence;
the user interaction unit: the user selects different instructions sent by the RFID reader according to specific test items; if the tag reading distance test item and the reading electric field intensity threshold test item are used, the RFID reader sends a reading command to read the content of the user storage area of the tag; and for the tag writing distance test item and the writing electric field intensity threshold test item, the RFID reader sends a writing command and writes specified content into a user storage area of the tag. The signal testing unit: detecting the maximum reading distance and the maximum writing distance of the tag capable of reading and writing, and the minimum electric field intensity of the reading data operation and the minimum electric field intensity of the writing data operation; the weight calculation unit: receiving test data transmitted by the signal test unit, and performing weighting processing on the test data by using a weighting function softplus function; the data saving unit: the system comprises a signal testing unit, a weighting calculation unit, a database and a control unit, wherein the signal testing unit is used for testing signals transmitted by an RFID reader; for subsequent analysis by a tester. The data output unit: and the test data and the final test result are used for generating a test report, and the test report is displayed to a tester in a text form.
According to the present invention, preferably, the signal testing unit includes a reading distance testing module, a writing distance testing module, a reading electric field strength threshold testing module, and a writing electric field strength threshold testing module;
the reading distance testing module: detecting an area in the tag identified by the RFID reader and reading a maximum distance of the content of the area; the write distance test module: detecting a maximum distance in the tag at which the RFID reader write command is received; the reading electric field strength threshold value testing module: testing the minimum electric field intensity of the tag for reading data; the writing electric field strength threshold value testing module: and testing the minimum electric field intensity of the tag for writing data.
According to the invention, the test system further comprises a sensor, wherein the sensor is connected with the signal test unit and is used for detecting the distance between the antenna and the tag and feeding the distance back to the signal test unit.
A test method for quantitatively evaluating the protocol consistency of RFID tags comprises the following steps:
(1) a user selects specific test items, wherein the test items comprise a reading distance test, a writing distance test, a reading electric field intensity threshold test and a writing electric field intensity threshold test, and the transmitting power p of the RFID reader, the working frequency fc of the RFID reader as 860MHz and the gain G of the transmitting antenna are set; according to the test item selected by the user, the RFID reader sends a read command or a write command to the tag; when a user selects a reading distance test or a reading electric field intensity threshold test, the RFID reader sends a reading command to the tag; when a user selects a writing distance test or a writing electric field intensity threshold test, the RFID reader sends a writing command to the tag;
(2) after receiving the command sent by the RFID reader, the tag makes a specific response: if the command is a read command, the tag feeds back data of the user storage area to the RFID reader, and if the command is a write command, the tag performs write operation on the user storage area; meanwhile, the monitoring antenna monitors the whole communication process of the RFID reader and the tag and transmits the monitored signal to the upper computer module; and carrying out subsequent treatment.
(3) According to different test items selected by the user in the step (1), the signal test unit performs the following different processes:
a. when the user selects the reading distance test in the step (1), entering a reading distance test module to calculate the passing rate of the maximum reading distance test item of the label;
b. when the user selects the write distance test in the step (1), entering a write distance test module to calculate the maximum write distance test item passing rate of the label;
c. when the user selects the reading electric field intensity threshold value test in the step (1), entering a reading electric field intensity threshold value test module to calculate the passing rate of the reading electric field intensity threshold value test;
d. when the user selects the writing electric field intensity threshold value test in the step (1), entering a writing electric field intensity threshold value test module to calculate the passing rate of the writing electric field intensity threshold value test;
(4) inputting the test passing rates obtained in the step (3) into a weighting calculation unit, wherein the test passing rates comprise a maximum reading distance test item passing rate, a maximum writing distance test item passing rate, a reading electric field intensity threshold test passing rate and a writing electric field intensity threshold test passing rate;
(5) using softplus function g (x) ln (1+ e)x-0.6) Calculating the weight of each test passing rate, wherein x refers to the passing rate of the test item, and g (x) is the weight of the test item; after a large number of experimental statistics and weighting by using a softplus function, the calculated test result is closest to the performance of an actual label.
(6) Normalizing the obtained weight values, and multiplying and adding the passing rates and the weights of all the test items respectively to obtain a final test index;
(7) and (4) storing the calculation results obtained in the steps (3) to (6) into a database, and presenting the calculation results to a tester in the form of a text test report.
According to a preferred embodiment of the present invention, the step a of entering the read distance test module to calculate the maximum read distance test item passing rate of the tag includes:
A. setting the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the command of the RFID reader and respond, reading the tag successfully, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step a; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum reading distance m;
B. comparing the magnitude relation between m and the reference value of the reading distance, if m is larger than the reference value of the reading distance, judging that the label reading distance test item passes, otherwise, judging that the label reading distance test item does not pass, and the value range of the reference value of the reading distance is 1-1.5 m;
C. and (4) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step A-B, and calculating the passing rate of the maximum reading distance test item of the label, otherwise, entering the step (4).
More preferably, the reference value of the reading distance is 1 m.
According to a preferred embodiment of the present invention, in the step b, entering the write distance test module to calculate a passing rate of the maximum write distance test item of the tag, includes:
D. keeping the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the write command of the RFID reader and write specified content, the tag is successfully written, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step b; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum writing distance n;
E. comparing the magnitude relation between n and the reference value of the writing distance, if n is larger than the reference value of the writing distance, judging that the label writing distance test item passes, otherwise, judging that the item test item does not pass, wherein the value range of the reference value of the writing distance is 0.8-1 m;
F. and (3) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step D-E, and calculating the maximum write distance test item passing rate of the tag, otherwise, entering the step (4).
Further preferably, the reference value of the write distance is 0.8 m.
According to a preferable embodiment of the present invention, in the step c, the step of calculating the test passing rate of the reading electric field strength threshold by the reading electric field strength threshold test module includes:
firstly, the maximum reading distance d of the label is obtained through the step a, and the field intensity E of the label at the maximum reading distance dreadComprises the following steps:
② will EreadComparing with a preset standard value of reading electric field intensity, if EreadIf the standard value is less than the standard value, the test is considered to pass, otherwise, the test does not pass; the value range of the standard value of the reading electric field intensity is 3-5V/m;
and thirdly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (I) -step (II), calculating the passing rate of the electric field intensity threshold test of the tag reading, and if not, entering the step (4).
Further preferably, the standard value of the reading electric field strength is 4V/m.
According to a preferred embodiment of the present invention, the step d of entering the writing electric field strength threshold value testing module to calculate the writing electric field strength threshold value testing passing rate includes:
and fourthly, acquiring the maximum writing distance di of the label through the step b, wherein the field intensity of the label at the maximum writing distance di is as follows:
fifthly, EwriteComparing with preset writing electric field strength standard value, if EwriteIf the standard value is less than the standard value, the test is considered to pass, otherwise, the test does not pass; the standard value range of the writing electric field intensity is 5-8V/m;
sixthly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (c) -fifth, calculating the passing rate of the label writing electric field intensity threshold test, and otherwise, entering the step (4).
Further preferably, the writing electric field strength standard value is 6V/m.
The invention has the beneficial effects that:
1. the invention provides an RFID automatic test system for detecting the support degree of a label on an RFID protocol, thereby giving quantitative and accurate evaluation to the label in the RFID system and providing technical support and guidance for RFID testers and manufacturers.
2. The invention can store the test data in the database, is convenient for testers to carry out secondary development, reduces the cost of the RFID test, and simultaneously presents the test report to the testers in a text form, so that the test report is visual and clear.
3. The test method for quantitatively evaluating the protocol consistency of the RFID label carries out comprehensive performance test on the label to form a relatively comprehensive test result, and the consistency of the performance test result of the label and the actual performance condition of the label is more than 90%.
Drawings
FIG. 1 is a block diagram of a test system for quantitatively evaluating the protocol consistency of RFID tags according to the present invention;
FIG. 2 is a schematic flow chart of the test method for quantitatively evaluating the protocol consistency of the RFID tag according to the present invention.
Detailed Description
The invention is further defined in the following, but not limited to, the figures and examples in the description.
Example 1
A test system for quantitatively evaluating the protocol consistency of an RFID label is shown in figure 1 and comprises an RFID reader, a label, an antenna and an upper computer module based on an MFC (micro-fluidic circuit);
an RFID reader: sending an instruction, and transmitting radio frequency energy through one or more antennas to realize information reading and data writing operations on the tag; labeling: the RFID tag is a data carrier of a radio frequency identification system and is used for receiving a signal sent by an RFID reader, transmitting information stored in the tag, such as an identity card number, a commodity number and the like, by modulating the signal and reflecting the signal back; the antenna comprises a transmitting antenna and a monitoring antenna, the transmitting antenna is used for emitting the instruction sent by the RFID reader into the air in an electromagnetic wave mode, the monitoring antenna is used for monitoring the communication process of the RFID reader and the tag and transmitting the received signals of the RFID reader and the tag to the upper computer module in an electric connection mode; the upper computer module: and receiving the signal transmitted by the monitoring antenna, performing corresponding signal processing and testing according to the specific requirements of the user, and feeding back the testing result to the user.
Example 2
The test system for quantitatively evaluating the protocol consistency of the RFID tags, which is described in embodiment 1, is different from the test system,
the upper computer module comprises a user interaction unit, a signal testing unit, a weighting calculation unit, a data storage unit and a data output unit which are connected in sequence;
a user interaction unit: the user selects different instructions sent by the RFID reader according to specific test items; if the tag reading distance test item and the reading electric field intensity threshold test item are used, the RFID reader sends a reading command to read the content of the user storage area of the tag; and for the tag writing distance test item and the writing electric field intensity threshold test item, the RFID reader sends a writing command and writes specified content into a user storage area of the tag. A signal test unit: detecting the maximum reading distance and the maximum writing distance of the tag capable of reading and writing, and the minimum electric field intensity of the reading data operation and the minimum electric field intensity of the writing data operation; a weighting calculation unit: receiving test data transmitted by the signal test unit, and performing weighting processing on the test data by using a weighting function softplus function; a data saving unit: the system comprises a database, a signal testing unit, a weighting calculation unit and a control unit, wherein the database is used for storing a command sent by an RFID reader, a signal testing unit and a calculation result obtained by the weighting calculation unit into the database; for subsequent analysis by a tester. A data output unit: and the test data and the final test result are used for generating a test report, and the test report is displayed to a tester in a text form.
Example 3
The test system for quantitatively evaluating the protocol consistency of the RFID tags, which is described in embodiment 2, is different from the test system,
the signal testing unit comprises a reading distance testing module, a writing distance testing module, a reading electric field intensity threshold testing module and a writing electric field intensity threshold testing module;
a reading distance testing module: detecting an area in the tag identified by the RFID reader and reading the maximum distance of the content of the area; a write distance test module: detecting the maximum distance of the tag for receiving a write command of the RFID reader; reading electric field strength threshold value testing module: testing the minimum electric field intensity of the tag for reading data; write electric field strength threshold test module: and testing the minimum electric field intensity of the write data operation of the tag.
Example 4
The test system for quantitatively evaluating the protocol consistency of the RFID tags, which is described in embodiment 2, is different from the test system,
the test system also comprises a sensor which is connected with the signal test unit and is used for detecting the distance between the antenna and the label and feeding the distance back to the signal test unit.
Example 5
The testing method of the testing system for quantitatively evaluating the protocol consistency of the RFID tag, as shown in fig. 2, includes:
(1) a user selects specific test items through a user interaction interface, the test items comprise a reading distance test, a writing distance test, a reading electric field intensity threshold test and a writing electric field intensity threshold test, and the transmitting power p of an RFID reader, the working frequency fc of the RFID reader are set to be 860MHz, and the gain G of a transmitting antenna are set; according to the test item selected by the user, the RFID reader sends a read command or a write command to the tag; when a user selects a reading distance test or a reading electric field intensity threshold test, the RFID reader sends a reading command to the tag; when a user selects a write distance test or a write electric field intensity threshold test, the RFID reader sends a write command to the tag;
(2) after receiving a command sent by the RFID reader, the tag makes a specific response: if the command is a read command, the tag feeds back data of the user storage area to the RFID reader, and if the command is a write command, the tag performs write operation on the user storage area; meanwhile, the monitoring antenna monitors the whole communication process of the RFID reader and the tag and transmits the monitored signal to the upper computer module; and carrying out subsequent treatment.
(3) According to different test items selected by the user in the step (1), the signal test unit performs the following different processes:
a. when the user selects the reading distance test in the step (1), entering a reading distance test module to calculate the passing rate of the maximum reading distance test item of the label; the method comprises the following steps:
A. setting the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the command of the RFID reader and respond, reading the tag successfully, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step a; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum reading distance m;
B. comparing the magnitude relation between m and the reference value of the reading distance, if m is larger than the reference value of the reading distance, judging that the label reading distance test item passes, otherwise, judging that the label reading distance test item does not pass, and the value range of the reference value of the reading distance is 1-1.5 m;
C. and (4) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step A-B, and calculating the passing rate of the maximum reading distance test item of the label, otherwise, entering the step (4).
b. When the user selects the write distance test in the step (1), entering a write distance test module to calculate the maximum write distance test item passing rate of the label; the method comprises the following steps:
D. keeping the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the write command of the RFID reader and write specified content, the tag is successfully written, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step b; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum writing distance n;
E. comparing the magnitude relation between n and the reference value of the writing distance, if n is larger than the reference value of the writing distance, judging that the label writing distance test item passes, otherwise, judging that the item test item does not pass, wherein the value range of the reference value of the writing distance is 0.8-1 m;
F. and (3) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step D-E, and calculating the maximum write distance test item passing rate of the tag, otherwise, entering the step (4).
c. When the user selects the reading electric field intensity threshold value test in the step (1), entering a reading electric field intensity threshold value test module to calculate the passing rate of the reading electric field intensity threshold value test; the method comprises the following steps:
firstly, obtaining the maximum reading distance d of the label through the step a, and then the field strength Eread of the label at the maximum reading distance d is as follows:
comparing Eread with a preset standard value of the reading electric field intensity, if Eread is smaller than the standard value, the test is considered to pass, otherwise the test does not pass; the value range of the standard value of the reading electric field intensity is 3-5V/m;
and thirdly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (I) -step (II), calculating the passing rate of the electric field intensity threshold test of the tag reading, and if not, entering the step (4).
d. When the user selects the writing electric field intensity threshold value test in the step (1), entering a writing electric field intensity threshold value test module to calculate the passing rate of the writing electric field intensity threshold value test; the method comprises the following steps:
and fourthly, acquiring the maximum writing distance di of the label through the step b, wherein the field intensity of the label at the maximum writing distance di is as follows:
fifthly, EwriteComparing with preset writing electric field strength standard value, if EwriteIf the standard value is less than the standard value, the test is considered to pass, otherwise, the test does not pass; the standard value range of the writing electric field intensity is 5-8V/m;
sixthly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (c) -fifth, calculating the passing rate of the label writing electric field intensity threshold test, and otherwise, entering the step (4).
(4) Inputting the test passing rates obtained in the step (3) into a weighting calculation unit, wherein the test passing rates comprise a maximum reading distance test item passing rate, a maximum writing distance test item passing rate, a reading electric field intensity threshold test passing rate and a writing electric field intensity threshold test passing rate;
(5) using softplus function g (x) ln (1+ e)x-0.6) Calculating the weight of each test passing rate, wherein x refers to the passing rate of the test item, and g (x) is the weight of the test item; after a large number of experimental statistics and weighting by using a softplus function, the calculated test result is closest to the performance of an actual label.
(6) Normalizing the obtained weight values, and multiplying and adding the passing rates and the weights of all the test items respectively to obtain a final test index;
(7) and (4) storing the calculation results obtained in the steps (3) to (6) into a database, and presenting the calculation results to a tester in the form of a text test report.
Example 6
The test method according to embodiment 5, which is different in that the reference value of the read distance is 1 m. The value of the reference value of the write distance is 0.8 m. The standard value of the reading electric field strength is 4V/m. The standard value of the writing electric field intensity is 6V/m.
Claims (12)
1. A test system for quantitatively evaluating the protocol consistency of an RFID label is characterized by comprising an RFID reader, a label, an antenna and an upper computer module based on an MFC (micro-fluidic circuit), wherein the upper computer module comprises a microprocessor, a memory and a microprocessor;
the RFID reader: sending an instruction, and transmitting radio frequency energy through one or more antennas to realize information reading and data writing operations on the tag; the label is as follows: the RFID tag is used for receiving a signal sent by an RFID reader, transmitting information stored by the tag by modulating the signal and reflecting the signal back; the antenna comprises a transmitting antenna and a monitoring antenna, the transmitting antenna is used for emitting the instruction sent by the RFID reader into the air in an electromagnetic wave mode, and the monitoring antenna is used for monitoring the communication process of the RFID reader and the tag and transmitting the received signals of the RFID reader and the tag to the upper computer module in an electric connection mode; the upper computer module: receiving the signal transmitted by the monitoring antenna, performing corresponding signal processing and testing according to the specific requirements of the user, and feeding back the testing result to the user;
the upper computer module comprises a user interaction unit, a signal testing unit, a weighting calculation unit, a data storage unit and a data output unit which are connected in sequence;
the user interaction unit: the user selects different instructions sent by the RFID reader according to specific test items; the signal testing unit: detecting the maximum reading distance and the maximum writing distance of the tag capable of reading and writing, and the minimum electric field intensity of the reading data operation and the minimum electric field intensity of the writing data operation; the weight calculation unit: receiving the test data transmitted by the signal test unit, and carrying out weighting processing on the test data; the data saving unit: the system comprises a signal testing unit, a weighting calculation unit, a database and a control unit, wherein the signal testing unit is used for testing signals transmitted by an RFID reader; the data output unit: and the test data and the final test result are used for generating a test report, and the test report is displayed to a tester in a text form.
2. The system of claim 1, wherein the signal testing unit comprises a reading distance testing module, a writing distance testing module, a reading electric field intensity threshold testing module, and a writing electric field intensity threshold testing module;
the reading distance testing module: detecting an area in the tag identified by the RFID reader and reading a maximum distance of the content of the area; the write distance test module: detecting the maximum distance of the tag for receiving the write command of the RFID reader; the reading electric field strength threshold value testing module: testing the minimum electric field intensity of the tag for reading data; the writing electric field strength threshold value testing module: and testing the minimum electric field intensity of the tag for writing data.
3. The system of claim 2, further comprising a sensor connected to the signal testing unit for detecting a distance between the antenna and the tag and feeding the distance back to the signal testing unit.
4. A test method for quantitatively evaluating the protocol consistency of RFID tags by the test system of claim 3, comprising:
(1) a user selects specific test items, wherein the test items comprise a reading distance test, a writing distance test, a reading electric field intensity threshold test and a writing electric field intensity threshold test, and the transmitting power p of the RFID reader, the working frequency fc of the RFID reader as 860MHz and the gain G of the transmitting antenna are set; according to the test item selected by the user, the RFID reader sends a read command or a write command to the tag;
(2) after receiving the command sent by the RFID reader, the tag makes a specific response: if the command is a read command, the tag feeds back data of the user storage area to the RFID reader, and if the command is a write command, the tag performs write operation on the user storage area; meanwhile, the monitoring antenna monitors the whole communication process of the RFID reader and the tag and transmits the monitored signal to the upper computer module;
(3) according to different test items selected by the user in the step (1), the signal test unit performs the following different processes:
a. when the user selects the reading distance test in the step (1), entering a reading distance test module to calculate the passing rate of the maximum reading distance test item of the label;
b. when the user selects the write distance test in the step (1), entering a write distance test module to calculate the maximum write distance test item passing rate of the label;
c. when the user selects the reading electric field intensity threshold value test in the step (1), entering a reading electric field intensity threshold value test module to calculate the passing rate of the reading electric field intensity threshold value test;
d. when the user selects the writing electric field intensity threshold value test in the step (1), entering a writing electric field intensity threshold value test module to calculate the passing rate of the writing electric field intensity threshold value test;
(4) inputting the test passing rates obtained in the step (3) into a weighting calculation unit, wherein the test passing rates comprise a maximum reading distance test item passing rate, a maximum writing distance test item passing rate, a reading electric field intensity threshold test passing rate and a writing electric field intensity threshold test passing rate;
(5) using softplus function g (x) ln (1+ e)x-0.6) Calculating the weight of each test passing rate, wherein x refers to the passing rate of the test item, and g (x) is the weight of the test item;
(6) normalizing the obtained weight values, and multiplying and adding the passing rates and the weights of all the test items respectively to obtain a final test index;
(7) and (4) storing the calculation results obtained in the steps (3) to (6) into a database, and presenting the calculation results to a tester in the form of a text test report.
5. The method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 4, wherein the step a of entering the read distance test module to calculate the passing rate of the maximum read distance test item of the tag comprises the following steps:
A. setting the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the command of the RFID reader and respond, reading the tag successfully, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step a; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum reading distance m;
B. comparing the magnitude relation between m and the reference value of the reading distance, if m is larger than the reference value of the reading distance, judging that the label reading distance test item passes, otherwise, judging that the label reading distance test item does not pass, and the value range of the reference value of the reading distance is 1-1.5 m;
C. and (4) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step A-B, and calculating the passing rate of the maximum reading distance test item of the label, otherwise, entering the step (4).
6. The test method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 5, wherein the reference value of the reading distance is 1 m.
7. The method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 4, wherein the step b of entering the write distance test module to calculate the passing rate of the maximum write distance test item of the tag comprises the following steps:
D. keeping the initial distance between the tag and the transmitting antenna within 0.5m, if the tag can correctly receive the write command of the RFID reader and write specified content, the tag is successfully written, continuing to increase the distance between the tag and the transmitting antenna, and returning to the step b; otherwise, recording the distance between the tag and the transmitting antenna at the moment, namely the maximum writing distance n;
E. comparing the magnitude relation between n and the reference value of the writing distance, if n is larger than the reference value of the writing distance, judging that the label writing distance test item passes, otherwise, judging that the item test item does not pass, wherein the value range of the reference value of the writing distance is 0.8-1 m;
F. and (3) judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step D-E, and calculating the maximum write distance test item passing rate of the tag, otherwise, entering the step (4).
8. The test method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 7, wherein the reference value of the write distance is 0.8 m.
9. The method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 4, wherein the step c of entering the reading electric field strength threshold test module to calculate the passing rate of the reading electric field strength threshold test comprises the following steps:
firstly, the maximum reading distance d of the label is obtained through the step a, and the field intensity E of the label at the maximum reading distance dreadComprises the following steps:
② will EreadComparing with a preset standard value of reading electric field intensity, if EreadIf the standard value is less than the standard value, the test is considered to pass, otherwise, the test does not pass; the value range of the standard value of the reading electric field intensity is 3-5V/m;
and thirdly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (I) -step (II), calculating the passing rate of the electric field intensity threshold test of the tag reading, and if not, entering the step (4).
10. The test method for quantitatively evaluating the protocol consistency of RFID tags according to claim 9, characterized in that the standard value of the read electric field strength is 4V/m.
11. The method for quantitatively evaluating the protocol consistency of the RFID tag according to claim 4, wherein the step d of entering the writing electric field strength threshold value test module to calculate the passing rate of the writing electric field strength threshold value test comprises the following steps:
and fourthly, acquiring the maximum writing distance di of the label through the step b, wherein the field intensity of the label at the maximum writing distance di is as follows:
fifthly, EwriteComparing with preset writing electric field strength standard value, if EwriteIf the standard value is less than the standard value, the test is considered to pass, otherwise, the test does not pass; the standard value range of the writing electric field intensity is 5-8V/m;
sixthly, judging whether the current working frequency of the RFID reader is smaller than 960MHz, if so, increasing the working frequency of the RFID reader in the step (1) to be fc +10MHz, repeating the step (c) -fifth, calculating the passing rate of the label writing electric field intensity threshold test, and otherwise, entering the step (4).
12. The test method for quantitatively evaluating the protocol consistency of RFID tags according to claim 11, characterized in that the standard value of the write electric field strength is 6V/m.
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